TY - RPRT A1 - Bhaiya, Madhur A1 - Jahr, Andreas A1 - Happel, Holger T1 - Harvesting-Combine-Flow Simulation Technique N2 - CFX 11.0 is a Computational Fluid Dynamics (CFD) program for simulating the behavior of systems involving fluid flow, heat transfer, and other related physical processes. It works by solving the equations of fluid flow (in a special form) over a region of interest, with specified (known) conditions on the boundary of that region. This tool is used here to analyse the straw cutter which is used to comminute the straw which is left standing in the field after stripper header has stripped the grains from the crops. Stripper Header is a new technique different to conventional harvester machines and it is still under development and testing. It works on the principle in which grains are first stripped off from the head of the standing crop which helps in much reduced intake freeing up the separation systems to handle a larger volume of grains. But with this, the new problem of the disposal of the long, uncut straw left after stripping of grains arose. So a straw cutter is used after the stripper header stage in this Combine Harvester, where the rotor is equipped with pressed steel blades and rotates towards the crop, i.e., it cuts and lifts the straw over the top. This technique is environment friendly because previously farmers would have to burn the long, uncut straw standing in the fields while in this case mulched straw can be used for min-till systems. This rotor based straw cutting machine is analysed here which helps us in increasing power efficiency and comminution rate and quality of cut straw particles. Here fluid flow simulation has been preferred over particle simulation: - CFX 10.0 tool is not very effective for particle simulation techniques and computation time is increased considerably. - It’s very hard to realize particle simulation in CFX 10.0 because we have to define size and properties of each particle and besides this wall conditions would have to be defined differently for every boundary. - Besides this, it’s hard to realize cutting effect with straw particles in CFX 10.0 which otherwise would be comminuted in real life conditions. - The results obtained from fluid simulation are validated using experimental results and found to be nearly the same which clearly contradicts any need of performing particle simulation. KW - Häckseln KW - Ernte KW - Stroh KW - Partikelstrom KW - CFD KW - chaff KW - harvesting KW - Particle flow KW - simulation KW - FHD Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-4239 CY - Düsseldorf ER - TY - GEN A1 - Czech, Michael T1 - Finite-Elemente Crashsimulation eines Stoßfängerquerträgers inklusive Crashboxen mittels einer nichtlinearen Kurzzeitanalyse N2 - Die Diplomarbeit beinhaltet die Finite-Elemente-Simulation eines Systems aus Stoßfängerquerträgers und Crashboxen. Durch eine gezielte Deformation sollen diese Elemente einen Teil der Aufprallenergie aufnehmen. In dieser Berechnung prallt das System mit einer hohen Geschwindigkeit auf eine Barriere auf. Dabei entstehen große Verformungen. Die gesamte Simulation spielt sich innerhalb von wenigen Millisekunden ab.Das Problem ist also gekennzeichnet durch die Lösung eines nichtlinearen dynamischen Problems mit großen Verformungen. Das speziell hierfür geeignete explizite Verfahren wurde hierbei verwendet. Dieses Verfahren zeichnet sich gegenüber dem impliziten durch kürzere Berechnungszeiten am Computer aus, vorausgesetzt die Stabilitätsbeschränkungen werden hierbei nicht verletzt. Eine Einführung in die Thematik der Finiten-Elemente-Methode (FEM)ist am Anfang dieser Diplomarbeit gesetzt. Von den Grundlagen der linear-elastischen FEM-Berechnungen erfolgt hiernach die Ausweitung auf nichtlineare FEM-Berechnungen. Materialeigenschaften wie das plastische Verformen (Fließen) oder die zunehmende Verfestigung mit steigender Beanspruchung werden hierbei aufgegriffen und in das FE-Modell eingearbeitet. Die eigentliche Simulation erfolgte in mehreren Schritten. Das System des Stoßfängerquerträgers wurde hierbei in die Komponenten Crashbox und Stoßfängerquerträger aufgeteilt. Die Auslegung der Crashbox erfolgte also getrennt. Es werden mehrere Varianten der Crashbox simuliert, wobei die Maße sowie die Wandstärke als vorgegeben angesehen werden. Die Varianten unterschieden sich in der Form der Falten an der Crashbox, welche eine gezielte Deformation und somit eine effizientere Aufnahme der Aufprallenergie, steuern sollen. Die Auslegung des Stoßfängerquerträgers erfolgte in ähnlicher Weise. In Hinblick auf Materialeinsparungen und Verstärkungen im Bereich vor der Crashbox werden mehrere Varianten gesondert simuliert. Aus den Ergebnissen der vorangehenden Analysen setzte sich schließlich das Gesamtsystem zusammen. Um die Aussagekraft dieser Analysen zu untersuchen wird am Ende der Aufprall des Gesamtsystems auf eine versetzte und deformierbare Barriere simuliert. KW - Finite-Elemente-Methode KW - Crashsimulation KW - nichtlineare Kurzzeitanalyse KW - FHD KW - Diplomarbeit Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1656 CY - Düsseldorf ER - TY - GEN A1 - Fischer, Andreas T1 - Entwicklung, Erprobung und Inbetriebnahme einer automatisierten Montageeinheit einschließlich der Teilezuführung N2 - Thema der Diplomarbeit ist die Entwicklung, Erprobung und Inbetriebnahme einer automatisierten Montageeinheit einschließlich der Teilezuführung. Die Arbeit wird im Rahmen der "projektbezogene Konstruktionsausbildung" an einer Anlage in der Fachhochschule Düsseldorf durchgeführt. Die Anlage stellt eine Fertigungszelle dar, bei der ein Rundling mit einem Kunststoffstopfen versehen wird und anschließend eine Qualitätskontrolle mit Bildverarbeitung durchläuft. Ziel der Diplomarbeit ist es, anhand eines Projektes, den Ablauf und die Vorgehensweise des methodischen Konstruierens zur Lösung eines Problems zu erarbeiten. Darunter fallen das funktions- und systemorientierte Konstruieren, die Planung und Durchführung von Versuchen im Entwicklungsablauf und die Lieferantenfragen. KW - Konstruktionslehre KW - Mechanik KW - automatisierte Montageeinheit KW - Diplomarbeit KW - MV Y1 - 1999 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-19 CY - Düsseldorf ER - TY - GEN A1 - Schmitz, Thomas T1 - Entwicklung einer mobilen Software zum Steuern und Überwachen von Wohnungstüren auf Basis von Android im Umfeld von Ambient Assisted Living N2 - In diesem Projekt wird eine mögliche Kombination von Android und OSGi als Grundlage einer mobilen Plattform für AAL Anwendungen betrachet. Im ersten Teil werden die Grundlagen der Android Programmierung erläutert. Darauf folgt ein kurzer Überblick über die verwendeten OSGi Dienste. Zum Schluß wird als mögliche Anwendung eine Implementierung zum Überwachen und Steuern von Wohnungstüren gezeigt, die im Rahmen des AAL Projekts zum Einsatz kommen könnte. KW - Android KW - AAL KW - OSGi KW - FHD KW - EI Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-6908 CY - Düsseldorf ER - TY - THES A1 - Schmitz, Thomas T1 - Entwicklung einer OSGi-Service-Komponente zum dynamischen Laden von Benutzeroberflächen für Android im Umfeld von Ambient Assisted Living T1 - Development of an OSGi Service Component for dynamic loading of user interfaces for Android in the field of Ambient Assisted Living N2 - In diesem Projekt wird ein Softwaresystem entwickelt, mit dem es möglich ist, verschiedene Geräte über ein Android Smartphone zu überwachen und zu steuern. Um auf die Dynamik der Umgebung zu reagieren, wird als Basis das OSGi Framework verwendet. Im ersten Teil wird auf die Architektur und den Aufbau von Android und des OSGi Framework eingegangen. Anschließend wird die für dieses Projekt entwickelte Architektur betrachtet. Zum Schluss wird die Implementierung der einzelnen Module und deren Zusammenwirken erläutert. KW - Android KW - OSGi KW - AAL KW - FHD KW - Bachelorthesis Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-6693 CY - Düsseldorf ER - TY - THES A1 - Kern, Mirco T1 - Optimierung der drahtlosen Kommunikation zwischen Komponenten mit Contiki-Betriebssystem in Hinblick auf Datendurchsatz, Energieeffizienz und Sicherheit am Beispiel des WieDAS-Projektes T1 - Improvement of the wireless communication between components running with the Contiki operating system in terms of bandwith, energy efficiency and security based on the example of the WieDAS project N2 - Dieses Bachelorprojekt wurde im Labor für Informatik an der Fachhochschule Düsseldorf durchgeführt und steht im Zusammenhang mit einem Forschungsprojekt zu dem Themengebiet Ambient Assisted Living. Hauptziele des Bachelorprojektes waren die Optimierung der Kommunikation über das 6LoWPAN-Protokoll hinsichtlich der Aspekte Datendurchsatz, Energieeffizienz und der Sicherheit der Datenübertragung. Um diese Ziele zu erreichen, wurden innerhalb des Projektes ein Kommunikationsmodul und eine entsprechenden Entwicklungsplatine realisiert. Zudem wurden softwaretechnische Funktionen entwickelt, die der Anpassung des Mikrocontroller-Betriebssystems Contiki 2.5 für die Nutzung der Stromsparfunktionen des verwendeten Mikrocontrollers ATmega128RFA1 und der Verwendung des Verschlüsselungsmoduls dienen. Durch die am Ende des Projektes durchgeführten Gerätetests konnte die Erreichung der wesentlichen Projektziele verifiziert werden. Innerhalb dieser Thesis wird dem Leser neben dem Grundlagenwissen zu dem verwendeten Mikrocontroller die Vorgehensweise bei der Erstellung der Hard- und Software näher gebracht werden. N2 - This bachelor project was realized in the laboratory of computer science at the Fachhochschule Düsseldorf and is associated with a research project on the topic of Ambient Assisted Living. The main goals of the bachelor project has been the improvement of the communication over the 6LoWPAN protocol in terms of bandwith issues, energy efficiency and the security of the data transmission. To achieve these goals within the project, a communication module with a suitable development board has been realized. In addition, software-related functions have been developed that are used to adapt the microcontroller operating system Contiki 2.5 for the use of the energy-saving features of the microcontroller ATmega128RFA1 and the use of its encryption module. At the end of the project device testings has been realized to verify the attainment of the project´s main goals. Within this thesis, the reader will get the basic knowledge of the used microcontroller and the procedure of creating the hardware and software. KW - ATmega128RFA1 KW - 6LoWPAN KW - IPv6 KW - Hardware-Verschlüsselung KW - AES KW - ATmega128RFA1 KW - Hardware Encryption KW - FHD Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-7203 CY - Düsseldorf ER - TY - THES A1 - Wientzek, Niels T1 - Konzeption und Implementierung eines Android-Services für das OSGi-Framework T1 - Design and implementation of an Android service for the OSGi Framework N2 - In diesem Projekt wird ein Softwaresystem entwickelt, mit dem es möglich ist ein OSGi Framework durchgängig im Hintergrund von Android zu betreiben. Für die Demonstration der Kommunikation zwischen Framework und weiteren Android Anwendungen wird eine Beispielanwendung entworfen. Im ersten Teil dieser Arbeit wird auf die technischen Grundlagen von Android sowie auf die OSGi Service Platform eingegangen. Anschließend folgt die Anforderungsanalyse, sowie die State-of-the-art-Analyse. Das Konzept wird erstellt und anschließend die Implementierung erläutert. Zum Schluss wird das Softwaresystem evaluiert und eine Zusammenfassung aller Kapitel beendet die Arbeit. N2 - In this project, a software system will be developed, which make it possible to operate an OSGi framework consistently in the background of Android. For communication between the Framework and other Android applications, a sample application is designed to demonstrate this. The first part of this thesis discusses the technology behind Android and the OSGi Service Platform. After that the requirements analysis and state-of-the-art analysis follows. The concept is created and the implementation is explained. Finally, the software system is evaluated and a summary of each chapter is at the end of this thesis. KW - OSGI KW - Android KW - Sorftwareengeneering KW - FHD Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-7341 CY - Düsseldorf ER - TY - GEN A1 - Kleiner, Tanja T1 - Entwicklung eines amperometrischen Blutglukosemessgerätes mit Touchscreen und integriertem Funkmodul zur Fernkontrolle für AAL N2 - Entwicklung eines Blutzcukermessgerätes auf Basis eines ATMEAG1284P für den Einsatz in AAL. Einsatz eines IPv6-Modul zur Übertragung der Messdaten. Bespielhafte Implementierung anhand eines Prototyps. KW - Blutzucker KW - Mikrocontroller KW - AAL KW - FHD KW - EI Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-7174 CY - Düsseldorf ER - TY - GEN A1 - Kern, Mirco T1 - Untersuchung eines Mikroprozessor-Betriebssystems mit 6LoWPAN-Stack in Hinblick auf die Portierung auf neue Prozessoren T1 - Analysis of an operation system for microprocessors containing a 6LoWPAN-Stack in terms of porting to other processors N2 - Innerhalb dieser Dokumentation des im Labor für Informatik an der Fachhochschule Düsseldorf durchgeführten Parxisprojekt werden zunächst Grundlagen vermittelt, die nötig sind, um den Kontext des Projekts und das Kommunikationsprotokoll 6LoWPAN zu verstehen. Da das Ziel des Praxisprojekts die Untersuchung eines Kommunikationssystems mit 6LoWPAN-Stack hinsichtlich dessen Portierungsmöglichkeiten ist, werden hierauf verschiedene, bereits auf dem Markt befindliche Lösungen analysiert und verglichen, die entweder direkt den drahtlosen Datenaustausch mit Hilfe des 6LoWPAN-Protokolls oder aber die Erweiterung zu einem eigenen Stack ermöglichen und dargestellt, warum das Mikrocontroller-Betriebssystem Contiki als geeignetster Kandidat hierfür erscheint. Als Basis für die Analyse in Hinblick auf eine mögliche Portierung dient der Mikrocontroller ATmega128RFA1 des Herstellers Atmel, der über eine integrierte Transceiver-Einheit verfügt. Nach der Vermittlung der Grundlagen des Contiki-Betriebssystems, die insbesondere den schichtenartigen Aufbau der Verzeichnisse und das komplexe, über Makefiles organisierte Build-System betreffen, folgt die Beschreibung der Vorgehensweise bei der Portierung von Contiki und den dabei aufgetretenen Problemen. Da während der Arbeit an diesem Praxisprojekt eine neue Version des Contiki-Betriebssystems veröffentlicht wurde, wird zusätzlich auf diese Version und die vorhandenen Inkompatibilitäten zwischen den verschiedenen Contiki-Versionen eingegangen und eine Beispielanwendung für die neue Version implementiert. Die Performancemessungen verschiedener Kommunikationshardware runden diese Arbeit zusammen mit dem Fazit, das nocheinmal auf das Betriebssystem Contiki, den Mikrocontroller ATmega128RFA1 und mögliche Vertiefungsund Optimierungsmöglichkeiten eingeht, ab. KW - Contiki KW - 6LoWPAN KW - Portierung KW - IPv6 KW - ATmega128RFA1 KW - FHD KW - EI Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-7084 CY - Düsseldorf ER - TY - GEN A1 - Andreas, Daniel T1 - Entwicklung einer über Funk angebundenen steuerbaren Heizungsregelung unter Verwendung des Betriebssystems Contiki im Umfeld des Ambient Assisted Livings N2 - Diese Arbeit befasst sich mit der Entwicklung einer über Funk steuerbaren Heizungsregelung. Dazu wird die Hardware unter Verwendung eines Mikrocontrollers entwickelt und das Betriebssystem Contiki verwendet, um die Funkanbindung zu realisieren. KW - Heizungsregelung KW - Contiki KW - FHD KW - EI Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8122 CY - Düsseldorf ER - TY - THES A1 - Andreas, Daniel T1 - Einbindung und Optimierung einer Heizungsregelung mittels eines Software-Frameworks in das Funknetzwerk des Ambient Assisted Living – Forschungsprojekts T1 - Integration and optimization of a heating control via a software framework into the wireless network of the Ambient Assisted Living research project N2 - Diese Bachelorthesis beinhaltet die Optimierung einer mikrocontroller-basierten Heizungsregelung und die Funkanbindung dieser an ein OSGi-Framework zur dynamischen Verwaltung von Komponenten. KW - Heizungsregelung KW - Contiki KW - OSGi KW - FHD Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8137 CY - Düsseldorf ER - TY - THES A1 - Kock, Stephan T1 - Körperschallmessungen an techn. Systemen T1 - Measurement of structure born sound at technical systems N2 - Diese Arbeit befasst sich mit der Entwicklung eines Messplatzes zur Erfassung von Körperschallemissionen eines technischen Systems. Der Leser dieser Arbeit soll einen Einblick in die physikalischen und normativen Grundlagen einer Körperschalluntersuchung erhalten. Er soll weiterhin in die Lage versetzt werden, den entwickelten Messplatz zu verstehen und eigenständig Prüfungen durchzuführen. N2 - This thesis discusses the development of a measurement setup to capture structure born sound emissions from technical systems. The reader of this thesis should get an insight into the physical and normative principles of structure born sound measurement. He should also be enabled to understand the developed measurement setup and to perform an examination on his own. KW - Körperschall KW - Körperschallmessung KW - Bachelor KW - Systeme KW - Körperschalluntersuchung KW - measurement KW - structure born sound KW - technical system KW - sound measurement KW - FHD Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-7592 CY - Düsseldorf ER - TY - THES A1 - Moecker, Sascha T1 - Applikationsentwicklung auf dem mobilen Android System zur Interaktion mit Prozessdaten auf einer Siemens SIMATIC SPS N2 - In dieser Bachelor-Thesis werden die Möglichkeiten eines Remote-Zugriffs auf die Prozessdaten einer Siemens SIMATIC speicherprogrammierbaren Steuerung (SPS) untersucht. Der Schwerpunkt liegt auf der Interaktion mit Prozessdaten über ein mobiles Android-Gerät unter Nutzung der WLAN-Schnittstelle. Als praktischer Teil der Thesis steht daher die Entwicklung einer Android-Applikation zum Erstellen, Editieren und Ausführen grafischer Oberflächen, welche Prozessdaten anschaulich über Anzeigeelemente darstellen und eine Interaktion mit dem Anwender über Bedienelemente auf dem Bildschirm des mobilen Geräts ermöglichen. Hierzu geht die Thesis zu Beginn auf die grundlegenden Strukturen eines SIMATIC Automatisierungssystems hinsichtlich Hardware- und Softwarekomponenten sowie auf bestehende Remote-Zugriffsmöglichkeiten ein. Diese werden mit der App-Lösung verglichen und Vor- und Nachteile evaluiert. Anschließend werden die verwendete Kommunikationsbibliothek Libnodave und ein Abriss über das Android-Framework gegeben. Diese Technologien bilden die Grundlage zur Entwicklung eigener Applikationen zur Interaktion mit der SIMATIC Automatisierungshardware. Mit der Untersuchung des Softwareentwicklungsprozesses und der Funktionsbeschreibung der entwickelten Applikation AndroHmiS7 wird die Anwendung der erarbeiteten Themen gegeben. N2 - In this bachelor thesis the possibilities of a remote access to the process data of a Siemens SIMATIC programmable logic control (PLC) are examined. The main emphasis is on the interaction with process data over a mobile Android device under the use of the WLAN interface. The practical part of the thesis is therefore the development of an Android application for creating, editing and executing a graphical surface. This surface represents process data descriptive via display elements and makes an interaction with the user possible over the screen of the mobile device via operating elements. To this, the thesis initially goes into the basic structures of a SIMATIC automation system with regard to hardware and software items as well as to existing remote access options. These are compared to each other and advantages and disadvantages are evaluated with the App-solution. The used communication library Libnodave and a survey about the Android framework are given. These technologies form the basis for the development of individual applications for the interaction with SIMATIC automation hardware. With the examination of the software development process and the functional description of the developed application AndroHmiS7 an implementation of the topics worked out in this thesis is explained. T2 - Application development on the mobile Android System for interaction with process data on a Siemens Simatic PLC KW - Android KW - SIMATIC KW - S7-300 KW - WinAC KW - SPS KW - PLC KW - Libnodave KW - Mini-HMI KW - Prodave KW - Siemens KW - AndroHmiS7 KW - FHD Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8282 CY - Düsseldorf ER - TY - THES A1 - Müller, Thomas T1 - Verfahren zur Tragfähigkeitsberechnung von hochübersetzenden Epizykloidengetrieben für die Elektromobilität N2 - In dieser Arbeit wird ein allgemeingültiges Verfahren zur Tragfähigkeitsberechnung von hochübersetzenden Epizykloidengetrieben entwickelt. Epizykloidengetriebe sind spezielle Umlaufrädergetriebe mit epizykloidaler Triebstockverzahnung. Die Grundlage des Verfahrens bilden die Berechnungs- und Anwendungsnormen der DIN 3990. Neben der Herleitung des Rechengangs wird beispielhaft der Tragfähigkeitsnachweis für die Anwendung in einem urbanen Elektrofahrzeug ausgeführt. Das dabei betrachtete Epizykloidengetriebe hat eine Übersetzung von -34 bei einer maximalen Eingangsdrehzahl von 20.000 min-1 und einer zu übertragenden Leistung von 27 kW. Der Rechengang teilt sich auf in den Nachweis der Flankentragfähigkeit, der Zahnfußtragfähigkeit und der Fresstragfähigkeit. Das Vorgehen je Nachweis ist dabei vergleichbar: Es werden zunächst individuelle Faktoren berechnet, die anschließend in den rechnerischen Festigkeitsnachweis einfließen. Bei der Entwicklung des Rechenverfahrens wird auf eine Allgemeingültigkeit der Gleichungen geachtet. Damit wird die erstellte Auslegungsgrundlage auch für ein breites Einsatzspektrum außerhalb der Elektromobilität nutzbar. Für zukünftige Untersuchungen zu Aspekten der Dimensionierung und Anwendung der Epizykloidengetriebe werden Hinweise und Ansätze basierend auf den erlangten Erkenntnissen bereitgestellt. N2 - In this scientific paper a universal procedure is developed for the load capacity calculation of Epicycloid Gears. Epicycloid Gears are special Planetary Gears with an epicycloidical Lantern Gearing. The basis of the procedure are the calculation and application standards of the DIN 3990. In addition to the derivation of the calculation process, the load-bearing capacity proof for the application in an urban electric vehicle is exemplary carried out. The considered Epicycloid Gear has a transmission ration of -34 at a maximum input rotation speed of 20.000 min-1 and a transmitted power of 27 kW. The calculation process is divided into the proof of the Flank Load Capacity, the Root Load Capacity and the Scuffing Load Capacity. The procedure per detection is comparable: Apriori individual factors are calculated and entered into the analytical proof of strength afterwards. In the development of the calculation procedure the universal validity of the equations is considered. Thereby the created layout basis is utilizable for a wide application spectrum beyond the electro mobility. For future studies on aspects of dimensioning and usage of the Epicycloid Gear further hints and approaches based on the gained knowledge are provided. T2 - Procedure for the load capacity calculation of high transmission epicycloid gears for electric mobility KW - Getriebe KW - Elektromobilität KW - Tragfähigkeitsberechnung KW - Transmission KW - electric mobility KW - load capacity calculation KW - FHD Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8306 CY - Düsseldorf ER - TY - THES A1 - Knoll, Andreas T1 - Konzeption und Realisierung einer Client-Server-Anwendung zum mobilen entfernten Zugriff auf Dienste einer Ambient Assisted Living Service Plattform T1 - Design and realization of a client-server application for mobile remote access of services in an ambient assisted living service platform N2 - Diese Bachelor-Thesis befasst sich mit der Konzeption und Realisierung einer Client-Server-Anwendung zum mobilen entfernten Zugriff auf Dienste einer Ambient Assisted Living Plattform. Die Anwendungslogik befindet sich dabei auf einem Server, welcher Dienste mithilfe einer Implementierung von OSGi Remote Services zur Verfügung stellt. Als Client-Anwendung fungiert eine Android-App, welche auf diese Dienste zugreift und vom Server mittels auf dem MQTT-Protokoll basierenden Push Notifications über Alarme informiert wird. Diese Ausarbeitung gibt zunächst einen Einblick in die Android- und OSGi-Programmierung und beschreibt die Anforderungen an das zu entwerfende System. Nachfolgend wird der aktuelle Stand der Technik betrachtet und ein Realisierungskonzept erstellt. Anschließend wird die Realisierung der gewünschten Anwendung dokumentiert und das Ergebnis evaluiert. N2 - This bachelor’s thesis deals with the design and realization of a client-server application for mobile remote access of services in an ambient assisted living platform. The application logic is deployed to a server that provides services using an implementation of the OSGi specification for remote services. An Android application functions as the client which remotely accesses those services. In addition, the server sends alarm messages to the client using push notifications based on the MQTT protocol. This paper provides an insight into programming for OSGi and Android. Subsequently, it gives an overview of various implementations of push notifications as well as remote services for OSGi. In the last part, this thesis provides different concepts and a documentation of the prototypical implementation of the most appropriate one. Finally, the result is evaluated. KW - Android KW - OSGi KW - Remote Services KW - AAL KW - Push Notifications KW - FHD Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8080 CY - Düsseldorf ER - TY - GEN A1 - Knoll, Andreas T1 - Entwicklung einer OSGi-basierten Android-Software zum Steuern von Geräten im Bereich von Ambient Assisted Living N2 - Dieses Projekt befasst sich mit der Entwicklung einer Android-Software zur Steuerung von Geräten und Sensoren im Umfeld einer Ambient Assisted Living - Plattform. Ein durchgehend im Hintergrund betriebenes OSGi-Framework ermöglicht dabei die bidirektionale Kommunikation zwischen dem Smartphone / Tablet und den AAL-Geräten. Die Projektarbeit gibt einen Einblick in die Android-Programmierung, beschreibt die Anpassung eines OSGi-Frameworks an neue Software-Design-Richtlinien und dokumentiert detailliert die Konzeption und Realisierung einer Anwendung, welche die gewünschten Anforderungen erfüllt. N2 - This project deals with the development of an Android application which can be used as a control station for devices and sensors in an ambient assisted living platform. Bidirectional communication between a smartphone / tablet and the AAL devices is realized through an OSGi framework which permanently runs in the background. This paper gives an insight into programming for Android, describes the customization of an OSGi framework to match the latest software design guidelines and gives a detailed documentation of the conception and realization of an application that meets the requirements. KW - Android KW - OSGi KW - AAL KW - Android KW - OSGi KW - AAL KW - FHD KW - EI Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8093 CY - Düsseldorf ER - TY - THES A1 - Gerlach, Wolfram T1 - Evaluierung von Konzepten zur Integration des Nutzerwelten Systems in die Softwareplattform von openHAB N2 - In dieser Arbeit geht es um die Implementierung des NutzerWelten Systems in das Open Source Projekt von openHAB. Erst wird openHAB vorgestellt und die Konzepte dahinter, wie das Thing und das Item. Hiernach wird die NutzerWelten Plattform erörtert und die Architektur dahinter präsentiert. Aufbauend darauf wird auf die Konzepte zur Integration des NutzerWelten Systems in openHAB eingegangen. Anschließend wird ein Entwurf des Systems in UML aufgestellt und die Konzepte der Software Architektur vorgestellt, die für die Implementierung hilfreich sind. Zuletzt wird der Entwurf präzisiert und vertieft. Hierbei wird auf die Implementierung der einzelnen Klassen eingegangen und ihre Umsetzung vorgestellt. N2 - This thesis is about the implementation of the NutzerWelten-system into the open source project of openHAB. In the first part of this work, openHAB and its concepts, like the Thing and the Item, are introduced. The second part of this work presents the NutzerWelten-system and its architecture. Based on these systems, the concepts to integrate the system into openHAB are explained. In the following part of this work, a first draft of the system is created in UML and the used design patterns are presented. The last part shows the implementation of the designed classes and adds missing components to the concepts. T2 - Evaluation of concepts to integrate the Nutzerwelten-system into the software of openHAB KW - Nutzerwelten KW - automatisiertes Haus KW - smart home KW - openHAB KW - Masterthesis Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-10901 CY - Düsseldorf ER - TY - GEN A1 - Wlotzka, Victoria T1 - Implementierung von MQTT Services in openHAB T1 - Implementation of MQTT services in openHAB N2 - Dieses Praxisprojekt befasst sich mit dem offenen Nachrichten-Protokoll MQTT und wie dieses in dem Heimautomatisierungsprogramm openHAB implementiert werden kann. Dabei wird zunächst auf die verschiedenen Funktionalitäten von MQTT eingegangen. Im Folgenden wird das Programm openHAB näher erläutert und Schritt für Schritt erklärt, wie die Implementierung durchgeführt wird. Zum Schluss wird gezeigt, wie mit Hilfe von MQTT der Zugriff auf die Android App von Nutzerwelten erfolgt. KW - MQTT KW - openHAB Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-9712 CY - Düsseldorf ER - TY - GEN A1 - Sturmberg, Marius T1 - Analyse der Open Source ERP Software iDempiere N2 - Diese Projektarbeit befasst sich mit der ERP Open Source Software iDempiere. Sie richtet sich vorwiegend an Studenten aus dem Bereich Informationstechnik und soll als eine Art Guide dienen. Der Leser wird Schritt für Schritt in die Benutzung von iDempiere herangeführt und bekommt anschließend einen ersten Einblick in die Entwicklung des auf OSGi basierenden iDempiere. Dabei werden Themen wie das Einrichten der Eclipse-Entwicklungsumgebung mit Buckminster und Mercurial sowie das Einrichten der PostgreSQL Datenbank aufgegriffen. N2 - This project work deals with the ERP open source software iDempiere. The documentation was created for students of information engineering and should serve as a guide. The consumer will be guided step by step in the use of iDempiere and will then get a first insight into the development of the OSGi based iDempiere. The documentation will show how to setup the Eclipse environment and how to use Buckminster and Mercurial. It also will show how to create and configurate the PostgreSQL database. KW - iDempiere KW - ERP KW - iDempiere KW - ERP KW - FHD KW - EI Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8410 CY - Düsseldorf ER - TY - THES A1 - Sturmberg, Marius T1 - Funktionale Erweiterung der Open Source ERPSoftware iDempiere N2 - Diese Bachelor-Thesis befasst sich mit der Plug-in-Entwicklung der auf OSGi basierenden Open-Source ERP Software iDempiere. Sie gibt einen Einblick in die Grundlagen der Plug-in-Entwicklung in iDempiere wobei der Fokus auf der Entwicklung von iDempiere-Prozessen liegt. Im Mittelpunkt der Arbeit steht allerdings die Konzeption, Realisierung und Validierung eines eigenen Plug-ins. N2 - This bachelor thesis deals with the Plug-in development of the Open Source ERP Software iDempiere. It will deliver insight into the basics of Plug-in development in iDempiere. The focus of the basic chapter will be on the development of iDempiere processes. However the principal topic of the thesis is the conception, implementation and validation of an own iDempiere Plug-in. KW - iDempiere KW - ERP KW - Plug-in-Entwicklung KW - iDempiere KW - FHD KW - Plug-in-Development Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8424 CY - Düsseldorf ER - TY - THES A1 - Schulte, Stephen T1 - Migration der Nutzerwelten RCP Anwendung von Eclipse Version 3.7 nach Eclipse 4.x N2 - Im Rahmen dieser Bachelorthesis sollen die Möglichkeiten für eine Migration des Nutzerwelten Programmcodes in die neuen Eclipse 4 Versionen ermittelt und anhand von Beispielen schrittweise erklärt werden. Hierbei werden zunächst die neuen Möglichkeiten erläutert die eine Eclipse 4 Entwicklung bietet und welche Vorteile durch die Einführung von Dependency Injections und dem Application Model entstanden sind. Anschließend werden die möglichen Wege zur Durchführung einer Migration aufgezeigt und auf ihre Vorteile und Nachteile überprüft. Im letzten Abschnitt werden schließlich die Migrationswege anhand von Beispielen schrittweise an einem Bundle der Nutzerwelten RCP durchgeführt und auf ihren Nutzen für eine Migration des gesamten Programms bewertet. N2 - In the context of this bachelor thesis the possibilities for an migration of the Nutzerwelten program code should be determined by using examples and migrating the code step by step. At first we take a look at the new feature of the Eclipse 4 development and which advantages are given by using dependency injections and the application model. Afterwards the possible ways for an migration are demonstrated and verified for there positive and negative aspects. Finally the possible migration ways are shown at an example migration of the Nutzerwelten RCP bundle and the utility for an migration of the whole program is checked. KW - Eclipse KW - Migration KW - FHD Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-8843 CY - Düsseldorf ER - TY - RPRT A1 - Deckert, Carsten ED - Niemann, Jörg ED - Deckert, Carsten T1 - Tensions in Team Creativity: Using the Value Square to Model Team Climate for Creativity N2 - This paper explores the tensions in team creativity. The tensions in team creativity are based on a tension between originality and effectiveness in the standard definition of creativity. To display the tensions in team creativity, the value square (“Wertequadrat”) developed by Schulz von Thun (1998) is used which balances a value with its countervalue. The author identifies tensions for cohesion, consensus and conformity. Cohesion is described as a tension between team diversity and team safety, consensus as a tension between constructive controversy and participatory decision-making and conformity as a tension between support for innovation and task orientation. Finally, the connection of individual and team creativity is described as an interplay between solitary and interactive components. T3 - Working Papers in Industrial Engineering - 1 KW - Innovation KW - Creativity KW - Team Climate Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-16763 SN - 2627-8375 CY - Düsseldorf ER - TY - RPRT A1 - Biedermann, Till M. A1 - Kameier, Frank T1 - Konzeption eines praxisnahen Versuchsstandes zur Untersuchung von Leading Edge Serrations als Proof-of-Concept N2 - Der Einsatz von Leading Edge Serrations (gezackte Tragflächenvorderkanten) als Schallminderungsmaßnahme bei hochturbulenter Anströmung wurde bisher maßgeblich in Form von eben im Windkanal gelagerten, modifizierten Tragflügeln untersucht. Diese Untersuchungen dienten der aeroakustischen Designoptimierung und der Identifikation von Wirkmechanismen anhand eines simplifizierten Systems. Das zukünftige Einsatzgebiet dieser neuartigen Modifikation wird im Bereich von Windenergieanlagen, Flugzeugtriebwerken und kontrarotierenden Rotoren der nächsten Generation aber auch bei gängigen Axialverdichtern gesehen. Der Transfer der im ebenen System erhaltenen Erkenntnisse in Richtung einer rotierenden Applikation erfordert die Berücksichtigung einer Vielzahl an zusätzlichen Einflussgrößen, welche die aerodynamische und aeroakustische Effizienz der Leading Edge Serrations in Form verstärkender oder auch hemmender Effekte signifikant beeinflussen können. Im durchgeführten Projekt wurde untersucht, inwieweit sich diese durch Buckelwale und Eulen inspirierten Tragflächen auf rotierende Systeme übertragen lassen, ohne Einbußen ihrer bereits bestätigten vorteilhaften aeroakustischen und aerodynamischen Eigenschaften zu erleiden. Von besonderem Interesse waren hier etwaige Einflüsse der mit dem Radius variierenden Umfangsgeschwindigkeit sowie der im Praxisfall stark variierenden Anströmrichtungen und –zustände. In diesem Sinne wurde ein experimenteller Versuchsstand in Anlehnung an die DIN EN ISO 5136 zur simultanen Vermessungen der aeroakustischen und aerodynamischen Eigenschaften konzipiert. Ein eigens konzipierter Modellrotor in Form eines Axialverdichters ermöglichte einen flexiblen Austausch der Rotorblätter, was die Möglichkeit einer kosten- und zeitsparenden Variation der Rotorblattgeometrien bietet. Im Rahmen des Projektes konnten neben der Konzeption des Versuchsstandes im Rahmen einer experimentellen Proof-of-Concept Studie und einer umfangreichen Quantifizierung der Zuströmbedingungen auch das Schallreduktionspotential der untersuchten Applikation im rotierenden System nachgewiesen werden. Eine Variation verschiedener aerodynamischer und geometrischer Einflussgrößen lässt zudem allgemeingültige Aussagen bezüglich der zugrundeliegenden Abhängigkeiten zu. Zudem führten parallele Untersuchungen mittels Array-Beamforming mit dem Ziel der Schallquellenlokalisationen zu wertvollen Transfererkenntnissen bezüglich des Einsatzes von Leading Edge Serrations im rotierenden System. Eine erste Untersuchung zur möglichen Approximation der Wirkzusammenhänge von Einfluss- und Zielgrößen wies ein hohes Potential zur komplexen Modellbildung mittels neuronaler Netze aus. Die gewonnenen Erkenntnisse tragen zu einem tieferen Verständnis der zugrundeliegenden Wirkmechanismen von Leading Edge Serrations bei und unterstützten in der Definition weiterer verbleibender Forschungslücken, deren Erforschung im mittel- bis langfristigen Kontext einen Beitrag zu einer industriellen Verwertung dieser Applikation und somit zu einer Reduktion der Lärmbelastung der Bevölkerung leistet. N2 - Leading Edge Serrations are well known for their superior performance in reducing aerofoil-gust-interaction noise as well as beneficial aerodynamic properties such as delayed stall effects and an increased post stall performance. However, up to now, Leading Edge Serrations were mainly analysed in a rigidly mounted setting in front of free jets or in cascade applications in order to investigate fundamental effects and to study the underlying aerodynamic and aeroacoustic principles. Eventually, these serrations are intended to be used in rotating systems such as turbomachines, counter rotating rotors or fans and blowers. Even wind energy turbines represent a possible field of application. The transfer of the rigidly well-analysed serration effects to the rotating frame, though, poses one of the main obstacles for successfully implementing Leading Edge Serrations as a passive noise reduction application as several additional parameters and varying boundary conditions might affect the aerodynamic and aeroacoustic efficiency of the serrations. The current project investigates on how these serrations, inspired by owls and humpback whales, can be transferred to the rotating system by avoiding losses in aeroacoustic and aerodynamic performance and taking into account the already acquired knowledge on the underlying effects. Of particular interest are effects of the circumferential velocity, which scales linearly with the rotor radius as well as effects of varying points of operation, leading to changes in the stagger angles or altering inflow conditions, respectively. For the experimental study a test rig according to the ISO 5136 standard was realised, allowing a simultaneous measurement of both, aerodynamic and aeroacoustic properties. The rotor was self-designed according to the single aerofoil approach, featuring exchangeable fan blades to enable a time- and cost efficient variation of the serration parameters. Apart from realising the test rig and a detailed quantification of the inflow conditions, a Proof-of-Concept study was performed in order to confirm the aeroacoustic effect of Leading Edge Serrations in a rotating application and to carve out the noise reduction potential. Moreover, a variation of the geometric serration parameters as well as the aerodynamic inflow conditions already allows for drawing basic conclusions on the underlying scaling-laws and dependencies. A supplementary aeroacoustic study via array beamforming in the rigid frame provided information on the positions of main noise sources of aerofoils with and without serrations, which were of high value and facilitated a successful transfer to the rotating frame. Finally, by use of artificial neural networks, first steps were undertaken towards modelling the effect of the investigated parameters on the aerodynamic and aeroacoustic performance. A first developed fundamental model already allows for a prediction of the noise radiation and offers multiobjective-optimisation by means of aerodynamic and aeroacoustic properties. T3 - Berichte zu HSD-intern geförderten Forschungsprojekten - 2 KW - Konzeption KW - Leading Edge Serrations KW - Proof of Concept KW - Versuch Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-12300 SN - 2625-3690 CY - Düsseldorf ER - TY - CHAP A1 - Spiegel, Thomas A1 - Adam, Mario T1 - Lastflexibilität in Wohngebäuden für reale Stromnetze mit Transportbeschränkungen T2 - 10. Fachtagung Smart Energy and Systems, 04.-05.11.2019, Dortmund KW - Windheizung 2.0 Y1 - 2019 N1 - nur Vortrag, keine Veröffentlichung im Tagungsband CY - Dortmund ER - TY - RPRT A1 - Deckert, Carsten A1 - Maschmann, Jonas Christopher A1 - Ngoy, Mayanga T1 - Kreativität und Entrepreneurship im Masterstudium Maschinenbau an deutschen Fachhochschulen und Universitäten N2 - Von Maschinenbau-Ingenieur*innen wird oft erwartet, innovative Produkte, Dienstleistungen oder Prozesse zu entwickeln und zu vermarkten. Das Ziel der vorliegenden Arbeit ist es herauszufinden, inwiefern sie bereits im Masterstudium Maschinenbau durch die Förderung von Kreativität und Entrepreneurship darauf vorbereitet werden. Um die Forschungsfrage zu beantworten, wurden die Modulhandbücher der zehn größten Universitäten sowie Fachhochschulen mithilfe einer Schlagwortsuche auf einschlägige Begriffe analysiert. Die Studie zeigt, dass deutsche Ingenieur*innen sowohl an Fachhochschulen als auch an Universitäten hinsichtlich Kreativität und Entrepreneurship eher unzureichend ausgebildet werden. N2 - Mechanical engineers are often expected to develop and commercialize innovative products, services, or processes. The aim of this study is to find out to what extent they are already prepared for this in the master's programme in mechanical engineering by promoting creativity and entrepreneurship. To answer the research question, the module manuals of the ten largest universities and colleges were analysed for relevant terms using a keyword search. The study shows that German engineers are rather inadequately trained in creativity and entrepreneurship, both at universities and universities of applied sciences. T3 - Working Papers in Industrial Engineering - 4 KW - Kreativität KW - Innovation KW - Entrepreneurship KW - Entrepreneurial Mindset KW - Creativity KW - Mechanical Engineering Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-32121 SN - 2627-8375 PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - GEN A1 - Seidel, Carl Anton T1 - Jumping Humanoid Simulink Simulation With Three Hill-Type Muscle Models N2 - This paper investigates the implementation of a human body model for the simulation of a jumping motion in Simulink. It contains details to get an insight into modern biomechanics without previous experience. In the simulation, a Hill-Type muscle is used to generate joint momentum with a phenomenologically realistic relationship between muscle length and force. The simulation published with this article is one of many solutions to design a humanoid simulation. The paper guides through the implemented build and explains its range of application. KW - biomechanics KW - humanoid Simulation KW - locomotion study KW - Simulation of Mechanical Systems Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-33765 CY - Düsseldorf ER - TY - JOUR A1 - Deckert, Carsten A1 - Schomaker, Rahel M. T1 - Kultur und Innovation – Wie sich kulturelle Faktoren auf die nationale Innovationsfähigkeit auswirken JF - Der Betriebswirt KW - Innovation Y1 - 2019 U6 - https://doi.org/10.3790/dbw.60.2.18 SN - 2628-7846 VL - 60 IS - 2 SP - 18 EP - 23 PB - Duncker & Humblot ER - TY - JOUR A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heating, Ventilation, Domestic Appliances – an Energy Integrated System Concept for the Household of the Future JF - Energy Y1 - 2021 U6 - https://doi.org/10.1016/j.energy.2021.121303 SN - 0360-5442 VL - 234 PB - Elsevier ER - TY - JOUR A1 - von Berg, Markus A1 - Steffens, Jochen A1 - Weinzierl, Stefan A1 - Müllensiefen, Daniel T1 - Assessing room acoustic listening expertise JF - Journal of the Acoustical Society of America N2 - Musicians and music professionals are often considered to be expert listeners for listening tests on room acoustics. However, these tests often target acoustic parameters other than those typically relevant in music such as pitch, rhythm, amplitude, or timbre. To assess the expertise in perceiving and understanding room acoustical phenomena, a listening test battery was constructed to measure the perceptual sensitivity and cognitive abilities in the identification of rooms with different reverberation times and different spectral envelopes. Performance in these tests was related to data from the Goldsmiths Musical Sophistication Index, self-reported previous experience in music recording and acoustics, and academic knowledge on acoustics. The data from 102 participants show that sensory and cognitive abilities are both correlated significantly with musical training, analytic listening skills, recording experience, and academic knowledge on acoustics, whereas general interest in and engagement with music do not show any significant correlations. The regression models, using only significantly correlated criteria of musicality and professional expertise, explain only small to moderate amounts (11%–28%) of the variance in the “room acoustic listening expertise” across the different tasks of the battery. Thus, the results suggest that the traditional criteria for selecting expert listeners in room acoustics are only weak predictors of their actual performances. Y1 - 2021 U6 - https://doi.org/10.1121/10.0006574 VL - 150 IS - 4 PB - Acoustical Society of America ER - TY - JOUR A1 - Heizmann, Michael A1 - Braun, Alexander A1 - Glitzner, Markus A1 - Günther, Matthias A1 - Hasna, Günther A1 - Klüver, Christina A1 - Krooß, Jakob A1 - Marquardt, Erik A1 - Overdick, Michael A1 - Ulrich, Markus T1 - Implementing machine learning: chances and challenges JF - at - Automatisierungstechnik Y1 - 2022 U6 - https://doi.org/10.1515/auto-2021-0149 SN - 2196-677X VL - 70 IS - 1 SP - 90 EP - 101 PB - De Gruyter CY - Berlin ER - TY - CHAP A1 - Lohmann, Sandra A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Ille, Fabian A1 - Lambach, Stefan T1 - Jahres-Energieeffizienz Von Kühlgeräten Zur Klimatisierung - Normberechnung Und Simulation T2 - Deutsche Kaelte-und Klimatagung 2016, 16 - 18 November 2016, Kassel Kassel KW - Coolplan Y1 - 2017 SN - 978-1-5108-3656-3 N1 - Inhaltsverzeichnis: proceedings.com/content/033/033625webtoc.pdf SP - 1125 EP - 1376 PB - Deutscher Kalte- und Klimatechnisher Verein (DKV) CY - Hannover ER - TY - CHAP ED - Neef, Matthias ED - Zielke, Thomas ED - Fussenecker, Claudia ED - Niemann, Jörg T1 - Proceedings of the HSD Student Engineering Conferences | Issue 1: Selected Papers from the Courses 2018/2019 T3 - Proceedings of the HSD Student Engineering Conferences - 1 Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-21527 SN - 2700-1857 CY - Düsseldorf ER - TY - RPRT A1 - Deckert, Carsten A1 - Schomaker, Rahel M. A1 - Knappitsch, Eithne T1 - Culture and Entrepreneurship: The Political, Social and Individual Influences on Opportunity Entrepreneurs N2 - The impact of culture on entrepreneurship is a widely accepted phenomenon. Cultural factors influence entrepreneurship via different mechanisms on the macro-, meso-, and micro-level of a country. Building on existing research, we draw a clear link between national cultural dimensions and entrepreneurship, using a new model that arranges different cultural dimensions in groups based on their particular function: political, social, or individual (PSI-model) and that distinguishes between values and practices where relevant. The PSI-model provides a coherent theoretical framework on which different cultural dimensions and their impact on entrepreneurship can be analysed, allowing for particular attention to be drawn to social practices and social values. This paper contributes to a better understanding of the relationship between culture and entrepreneurship, providing empirical evidence of how specific cultural dimensions influence entrepreneurship. The findings are of relevance from a policy perspective and can be used to generate practical recommendations for national institutions interested in promoting entrepreneurship and entrepreneurial activities. The findings are also transferable to other fields related to national cultural dimensions such as level of innovation, investment, budgeting etc. T3 - Working Papers in Industrial Engineering - 3 KW - Entrepreneurship KW - Cultural Dimensions KW - National Culture KW - PSI Model Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-23837 SN - 2627-8375 PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Deckert, Carsten A1 - Mohya, Ahmed T1 - Kreativitätstechniken für angehende Ingenieurinnen und Ingenieure JF - Innovations-Forum N2 - In Zeiten fortschreitender Digitalisierung und zunehmender Transparenz auf den Märkten müssen sich Unternehmen mit zunehmenden Veränderungen, z. B. durch Prozess- und Produktinnovationen, auseinandersetzen. Es ist daher unerlässlich, dass sich angehende Ingenieurinnen und Ingenieure mit dem Prozess der Ideenfindung und der damit verbundenen Innovationsbereitschaft auseinandersetzen. Kreativität spielt eine entscheidende Rolle im Prozess der Ideengenerierung und Problemlösung. Hochschulen, die Ingenieurstudiengänge anbieten, sind daher gefordert, die entsprechenden Fähigkeiten zu vermitteln. Durch den gezielten Einsatz von Kreativitätstechniken kann die Kreativität gefördert werden. Der vorliegende Beitrag befasst sich mit der Bewertung unterschiedlicher Kreativitätstechniken und geht der Frage nach, welche Kreativitätstechniken sich eignen, den angehenden Ingenieurinnen und Ingenieuren beim kreativen Problemlösen zu unterstützen. KW - Kreativität KW - Innovation Y1 - 2020 VL - 18 IS - 1 SP - 42 EP - 46 PB - InnoFo ER - TY - CHAP ED - Jahr, Andreas ED - Batos, Andrej T1 - SIMULAND 2020: Simulation landtechnischer Prozesse, Düsseldorf, 19. März 2020 N2 - Die Simulation landwirtschaftlicher Prozesse hat in den vergangenen Jahren stark an Bedeutung gewonnen. Damit ist die Hoffnung verbunden, neue Erkenntnisse zu generieren mit dem Ziel der Erhöhung der Effizienz, Qualität und Wirtschaftlichkeit in der Landwirtschaft. Besonders große Herausforderungen stellen dabei die Modellierung landwirtschaftlicher Güter und der für Simulationen teilweise erforderliche, hohe Rechenaufwand dar. Um der bereits recht weiten und weiter fortschreitenden Verbreitung dieser Technologien Rechnung zu tragen und sie zu fördern, entstand die Idee für eine themenspezifische Tagung, die sich ausdrücklich und ausschließlich mit der Simulation landtechnischer Güter und Prozesse befasst. N2 - The simulation of agricultural processes has become important in recent years. Nowadays, the focus is mainly on the virtual representation of agricultural goods and the processes associated with their processing and handling. The goal of these efforts is to generate new knowledge helping to increase efficiency, quality and profitability in agriculture. Modelling of agricultural goods poses a large challenge due to their highly complex structure and a high scattering of the measured values as well as their inhomogeneous and time-varying properties. In addition, some simulation cases result in a high computing effort. In order to support and promote the already quite broad and progressive dissemination of these technologies, the idea for a topic-specific conference was born, which deals explicitly and exclusively with the simulation of agricultural goods and processes. T2 - SimuLand 2020 - Conference Proceedings KW - Simulation KW - VDI KW - FMDauto KW - Modellierung KW - Simulation KW - Parametrierung KW - Parameterermittlung KW - parameterization KW - parameter determination KW - agricultural goods Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-23368 SN - 978-3-941334-30-4 CY - Düsseldorf ER - TY - GEN A1 - Gottschald, Jonas A1 - Reich, Marius A1 - Adam, Mario T1 - Lernende Algorithmen - Künstliche Intelligenz für Wärmenetze T2 - hn21 Journal KW - BestHeatNet Y1 - 2021 UR - https://www.hn-nrw.de/aktivitaeten/publikationen/journal/# IS - 2021 SP - 8 EP - 8 PB - Zentrum für Forschungskommunikation CY - Köln ER - TY - THES A1 - Braun, Alexander T1 - Addressing Single Yb+ Ions: A new scheme for quantum computing in linear ion traps Y1 - 2007 SN - 978-3-86727-276-6 PB - Cuvillier Verlag CY - Göttingen ER - TY - CHAP A1 - Dubberke, Frithjof A1 - Priebe, Klaus-Peter A1 - Vrabec, Jadran A1 - Neef, Matthias A1 - Rödder, Maximilian T1 - Thermodynamic simulation and experimental validation of a cascaded two-stage organic Rankine cycle T2 - ASME ORC 2015, Brussels KW - simulation Y1 - 2015 CY - Brussels ER - TY - CHAP A1 - Helm, Peter A1 - Spliethoff, Hartmut A1 - Neef, Matthias T1 - Closing the Gap: Measuring Bristle Blow Down of Brush Seals T2 - 19 th International Conference on Fluid Sealing, Poitiers Y1 - 2007 CY - Poitiers ER - TY - CHAP A1 - Neef, Matthias A1 - Hepermann, Florian A1 - Sürken, Norbert A1 - Schettel, Joachim T1 - Brush Seal Porosity Modeling: Applicability and Limitations T2 - ETC7 – 7th Conference on Turbomachinery, Athens Y1 - 2007 CY - Athens ER - TY - CHAP A1 - Neef, Matthias A1 - Hummel, Dietrich T1 - Euler solutions for a finite-span flapping wing T2 - "Fixed, flapping and rotary wing vehicles at very low Reynolds numbers, Notre Dame, Indiana, USA Y1 - 2000 ER - TY - JOUR A1 - Deckert, Carsten T1 - Spannungsfelder der Teamkreativität: Wie Teamklima und -kontext zur Kreativität beitragen JF - Ideen und Innovationsmanagement N2 - Dieser Beitrag untersucht die Spannungsfelder der Teamkreativität. Die Spannungsfelder basieren auf einer grundlegenden Spannung aus Originalität und Effektivität, die der Standarddefinition der Kreativität zugrunde liegt. Es lassen sich auf Basis des Teamklimas und -kontextes Spannungsfelder hinsichtlich Konformität, Konsens und Kohäsion identifizieren. Mit Bezug zur Konformität müssen Teams ein positives Spannungsfeld aus der Unterstützung für Innovation und Aufgabenorientierung erreichen, um gleichzeitig Experimentierfreude zu fördern und hohe Qualitätsansprüche zu erzielen. Konsens entsteht im Spannungsfeld aus konstruktivem Konflikt und partizipatorischer Entscheidungsfindung. Bei der Kohäsion besteht eine Spannung zwischen der Teamidentität (Geborgenheit) und den individuellen Identitäten der Teammitglieder (Diversität). Der Beitrag beschreibt, wie diese drei Spannungsfelder zusammenarbeiten, wenn außergewöhnliche Kreativität in Teams entsteht. KW - Teamwork KW - Teamkreativität Y1 - 2019 SN - 2198-3143 IS - 4 SP - 116 EP - 120 ER - TY - THES A1 - Biedermann, Till M. T1 - Aeroacoustic transfer of leading edge serrations from single aerofoils to low-pressure fan applications T1 - Strömungsakustischer Transfer von Leading Edge Serrations an einzelnen Tragflügeln hin zu Niederdruck-Axialventilatoren N2 - Leading edge serrations are well-known for their aeroacoustic potential in reducing aerofoil-turbulence interaction noise and are also associated with certain aerodynamic advantages. To prepare leading edge serrations for industrial application, two obstacles remain to be addressed. First is a combined analysis of the aeroacoustic and the aerodynamic performance of leading edge serrations to develop optimum designs. Second is the need to examine the transferability of the known effects of leading edge serrations from a single aerofoil to full rotors, which are considered to be the final area of application. This thesis aims to assist in the transfer of a well-investigated aerofoil with serrated leading edges from the rigid to the rotating domain. With this purpose, a single aerofoil type is selected and thoroughly analysed, experimentally and numerically, to generate a reliable data basis for aerodynamic performance and noise reduction capability. Aside from gathering information on the overall performance, the spatial distribution of the noise sources is localised, and the spectral composition of the noise reduction is found to follow a clearly defined scaling law. Aerodynamically, generated vortices are found to be responsible for a complex three-dimensional separation mechanism of the leading edge serrations, causing a delay of stall. The generated data basis is then used to design low-pressure axial fans of minimum complexity by keeping the initially chosen aerofoil type. The experimentally identified noise reduction mechanisms for the serrated axial fans are found to be more diverse than the single aerofoil and highly dependent on the inflow conditions and the operation point of the fan. A highly similar pattern for the spectral scaling of the noise reduction supports the finding that at optimum operation conditions, the previously identified noise reduction mechanisms for the single aerofoils are transferable to the rotating domain. On the other hand, additional aerodynamic mechanisms are found to dominate the noise reduction for the instability region of the fan, also contributing to reduced blade-to-blade interaction effects. Moreover, the blade-tip leakage flow is altered by delaying the development of coherent structures. The next step towards a more general description of the aeroacoustic and aerodynamic dependencies is developing a comprehensive model based on artificial neural networks. This model allows a combined analysis of the aerodynamic and acoustic performance of rotors with serrated leading edges and shows an accurate prediction of the overall performance and the spectral composition of the radiated noise. It also enables the development of multi-objective optima for serration designs and motivates further studies into the generalisability of the observed trends. Furthermore, the developed model represents a feasible tool to create tailored serration designs for maximum efficiency in both aeroacoustics and aerodynamics, contributing to the development of future low-noise fans and rotating machinery. N2 - Leading Edge Serrations sind hinlänglich für ihr Potential zur Reduktion von turbulenzinduziertem Schall bekannt. Ebenso können sie sich als aerodynamisch vorteilhaft erweisen. Mit dem Ziel, Leading Edge Serrations industriellen Anwendungen zugänglich zu machen, verbleiben primär noch zwei Hemmnisse. Zum einen die Notwendigkeit einer kombinierten Bewertung des aerodynamischen und des aeroakustischen Potentials mit dem Ziel der Identifikation optimaler Designansätze. Zum anderen sind Aussagen hinsichtlich der Übertragbarkeit der bekannten Schallreduktionsmechanismen von einem einzelnen Tragflügel hin zu rotierenden Strömungsmaschinen zu treffen, da letztere das finale Anwendungsgebiet von Leading Edge Serrations darstellen. Diese Arbeit zielt darauf ab, bei dem Transfer eines umfassend analysierten Tragflügeldesigns mit Leading Edge Serrations hin zu einem rotierenden System zu assistieren. Hierzu wird ein für spätere rotierende Anwendungen sinnvolles Tragflügelprofil gewählt und sowohl experimentell als auch numerisch umfassend untersucht, um eine Datenbasis des aerodynamischen und aeroakustischen Potentials zu generieren. Neben Informationen über die globalen Eigenschaften, wurde ebenfalls die räumliche Lage der Schallquellen lokalisiert. Zudem konnte der Verlauf des spektralen Schallreduktionsvermögens einer klaren Gesetzmäßigkeit zugeordnet werden. In Bezug auf die Aerodynamik wurden Wirbelstrukturen, welche sich an den Leading Edge Serrations bilden, als ursächlich für einen komplexen dreidimensionalen Ablösemechanismus identifiziert, welcher eine verzögerte Strömungsablösung bewirkt. Unter Beibehaltung des gewählten Tragflügelprofils wurde die generierte Datenbasis in einem zweiten Schritt zur Auslegung von axialen Niederdruckventilatoren niedriger Komplexität genutzt. Die hier experimentell identifizieren Schallreduktionsmechanismen sind, im Vergleich zu einem einzelnen Tragflügel, deutlich diverser und weisen eine klare Abhängigkeit vom Betriebspunkt des Ventilators sowie von den Einflussparametern auf. Unter optimalen Zuströmbedingungen kann eine klare Übertragbarkeit der Effekte vom ebenen in das rotierende System gezeigt werden. Im Gegensatz wird das Schallreduktionspotential im Instabilitätsbereich des Ventilators durch aerodynamische Strömungsphänomene dominiert, welche zudem zu einer vorteilhaften Beeinflussung von Schaufelinteraktionen beitragen. Des Weiteren wurde durch den Einsatz von Rotoren mit Leading Edge Serrations eine verzögerte Entstehung von kohärenten Strukturen im Blattspitzenbereich nachgewiesen. Um einen weiteren Schritt in Richtung einer globalen Beschreibung der erhaltenen aeroakustischen und aerodynamischen Abhängigkeiten zu gehen, wurde ein umfassendes Modell generiert, welches auf dem Training künstlicher neuronaler Netze beruht. Das generierte Modell ermöglicht eine kombinierte Prognose der aerodynamischen und aeroakustischen Performance der getesteten Prototypen und weist sowohl im Zeitbereich als auch hinsichtlich der spektralen Zusammensetzung der Signale eine hohe Prognosegüte auf. Dies ermöglicht die Definition multikriterieller Optima bezüglich des Serration Designs und motiviert weiterführende Studien hinsichtlich einer Generalisierbarkeit der beobachteten Trends. Schlussendlich ermöglicht das generierte Modell maßgeschneiderte Designansätze für eine maximale aerodynamische und aeroakustische Effizienz, was einen sinnvollen Beitrag zur zukünftigen Entwicklungen schallarmer Ventilatoren und Strömungsmaschinen darstellt. KW - aeroacoustics KW - aerodynamics KW - low-pressure axial fan KW - leading edge serrations KW - artificial neural networks KW - künstliche neuronale Netze KW - Vorderkantenzacken KW - Niederdruck-Axialventilatoren KW - Aerodynamik KW - Strömungsakustik Y1 - 2019 U6 - https://doi.org/10.14279/depositonce-9075 PB - Technische Universität Berlin CY - Berlin ER - TY - RPRT A1 - Rings, Jørn A1 - Deckert, Carsten T1 - Innovation Spaces: Einfluss der physischen Arbeitsumgebung auf kreatives Denken in Büroumgebungen N2 - Das vorliegende Working Paper untersucht den Einfluss der physischen Arbeitsumgebung auf die Kreativität in Unternehmen. Dabei werden sowohl Aspekte der individuellen Kreativität als auch der Corporate Creativity (organisationalen Kreativität) betrachtet. Das Ergebnis ist eine Raumtypologie, die Funktionen eines Raumes in die beiden Achsen „Handeln vs. Geschehen-Lassen“ und „Rückzug vs. Begegnung“ einteilt und dadurch vier unterschiedliche Raumtypen im Hinblick auf die Kreativität unterscheidet. Diese vier Raumtypen sind die Grundlage für das Verständnis von Innovation Spaces – räumlichen Flächen im Unternehmen, die die Kreativ- und Ideenarbeit unterstützen. Das Wirken und die Ausgestaltung dieser unterschiedlichen Funktionen wird anhand von zwei Umsetzungsbeispiele von realisierten Innovation Spaces dargestellt und anhand der Ergebnisse einer Studie zu Akzeptanz und Erfolg von Innovation Spaces untersucht. Daraus werden Handlungsempfehlungen an Unternehmen herausgearbeitet, die Innovation Spaces als Teil einer Innovationskultur im Kontext von New Work begreifen. T3 - Working Papers in Industrial Engineering - 2 KW - Arbeitsplatz KW - Corporate Creativity KW - Innovation Spaces Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-20503 SN - 2627-8375 PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Baier, André A1 - Neef, Matthias T1 - Studierende lehren und lernen sozial-ökologische Verantwortung JF - Die Neue Hochschule KW - Verantwortung Y1 - 2019 VL - 60 IS - 5 SP - 8 EP - 11 ER - TY - GEN T1 - 680 - Dritte Satzung zur Änderung der Prüfungsordnung für die Bachelorstudiengänge „Elektro- und Informationstechnik“ und „Elektro- und Informationstechnik“ (dual) an der Hochschule Düsseldorf vom 19.12.2019 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 680 KW - Bachelor KW - Amtliche Mitteilungen KW - Elektro- und Informationstechnik KW - Satzung KW - Änderung KW - Prüfungsrecht Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-20902 CY - Düsseldorf ER - TY - GEN T1 - 683 - Dritte Satzung zur Änderung der Prüfungsordnung für den Bachelorstudiengang „Kommunikations- und Informationstechnik“ an der Hochschule Düsseldorf vom 19.12.2019 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 683 KW - Amtliche Mitteilungen KW - Prüfungsordnung KW - Bachelor KW - Satzung KW - Änderung KW - Kommunikations- und Informationstechnik KW - Prüfungsrecht Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-20944 CY - Düsseldorf ER - TY - CHAP A1 - Neef, Matthias T1 - Innerstädtische Nutzung von Kleinwindkraftanlagen: Potentiale und Hürden T2 - Mülheimer Initiative für Klimaschutz, 06.05.2013 Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-21017 CY - Mülheim an der Ruhr ER - TY - THES A1 - Neef, Matthias T1 - Analyse des Schlagfluges durch numerische Strömungsberechnung N2 - Mit Hilfe eines Finite-Volumen-Verfahrens wird die dreidimensionale reibungsbehaftete Stroemung um einen schlagenden Fluegel berechnet. Die Bewegungsparamter sind dabei vergleichbar mit den Bedingungen im Reiseflug grosser Voegel. Das numerische Verfahren wird fuer den gezeigten Anwendungsfall, indem eine Methode zur Realisierung von beliebigen periodischen Bewegungen implemetiert wird. Eine Verifizierung erfolgt durch den Vergleich mit analytischen, numerischen und experimentellen Ergebnissen aus der Literatur. Mit dem verifizierten Verfahren werden die instationaeren Groessen wie Druck und Geschwindigkeiten in der Umgebung des bewegten Fluegels berechnet. Daraus ergeben sich ferner die zeitlich gemittelten Groessen wie Schub und Wirkungsgrad des Schlagfluges. Ausserdem wird die Interaktion von Laengs- und Querwirbeln im Nachlauf des schlagenden Fluegels untersucht. Es zeigt sich ein dominanter Einfluss der pulsierenden Randwirbel aufgrund der endlichen Spannweite, waehrend die Anfahr- und Stoppwirbel, verursacht durch die Fluegelbewegung, im Reiseflug grosser Voegel nahezu vernachlaessigbar erscheinen. N2 - The three-dimensional viscous flow around a flapping wing is calculated by means of a finite volume code. The invoked motion parameters are comparable with the conditions in cruising flight of large birds. For the described application the numerical procedure is extended by implementing a method for realisation of arbitrary periodic motions. The verification is obtained by comparison with analytical, numerical and experimental results from existing literature. With the verified method the instationary quantities such as pressure and velocity are known in the vicinity of the wing. This also yields the time averaged values such as thrust and propulsive efficiency of the flapping wing propulsion. Additionally, the interaction between longitudinal and transverse vortices in the wake of the flapping wing is investigated. A dominant influence of the oscillating tip vortices due to the finite span can be seen, while the starting and stopping vortices due to the wing motion appear almost negligible in the cruising flight of large birds. Y1 - 2002 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:084-14501 UR - http://www.digibib.tu-bs.de/?docid=00001361 VL - ZLR-Forschungsbericht, 2 ER - TY - CHAP A1 - Neef, Matthias A1 - Fussenecker, Claudia A1 - Niemann, Jörg A1 - Zielke, Thomas ED - Clark, Robin ED - Munkebo Hussmann, Peter ED - Järvinen, Hannu-Matti T1 - Publish your undergraduate research! A mandatory course for master students in engineering T2 - Creativity, innovation and entrepreneurship for engineering education excellence : proceedings of the 46th SEFI Annual Conference 2018, Copenhagen, Denmark N2 - Undergraduate students in engineering often have little exposure to the world of scientific publishing and the culture of sharing research work. While the beneficial exchange between research and teaching is well promoted, while the benefits of conference participation for students have already been surveyed and while courses on scientific writing are readily available, the concept of mini-conferences as part of the curriculum combines all three aspects into one. Therefore, the course "Engineering Conferences" was developed and installed as a mandatory part of a master program for engineering students. The idea is to go beyond simply teaching the standards of academic writing and skills for using scientific publications. By using a learner-centered approach, the students are engaged in typical activities around an active attendance of a real conference. Based on their bachelor thesis, they write a paper complying with common academic standards, submit the paper and review submissions of their fellow students. They also produce a poster and defend their work in a poster session held publicly on campus. This contribution is based on the experience from the first four terms teaching the course. It explains the didactic rationale behind the concept and individual teaching modules, it comprises the collection of useful resources for teaching and organizing scientific publishing and it includes the consequences drawn from course evaluation results. Y1 - 2018 SN - 978-2-87352-016-8 PB - SEFI - Société Européenne pour la Formation des Ingénieurs CY - Brussels ER - TY - JOUR A1 - Dubberke, Frithjof H. A1 - Linnemann, Matthias A1 - Abbas, Wameedh Khider A1 - Baumhögger, Elmar A1 - Priebe, Klaus-Peter A1 - Roedder, Maximilian A1 - Neef, Matthias A1 - Vrabec, Jadran T1 - Experimental setup of a cascaded two-stage organic Rankine cycle JF - Applied Thermal Engineering N2 - In combination with a bottoming cycle, operated with a pure fluid in transcritical mode, the usage of a zeotropic mixture as a working fluid appears to be exergetically favorable for power cycle efficiency in cascaded two-stage organic Rankine cycles (CORC). A CORC is set up and initially tested with cyclopentane and propane as working fluids in its high temperature and low temperature cycle, respectively. A thermal oil cycle serves as the heat source and is powered electrically with a maximum heat flow of 158 kW. The design of this experimental setup allows for a rapid replacement of individual components and for a wide range of conditions in terms of fluids and thermodynamic states. The components of all cycles and the measurement and control technology are described in detail. A testing procedure is presented, followed by a discussion of the measurement results, where it is shown that the intended concept of two cascaded organic Rankine cycles is operational and that the measured data are consistent. KW - organic Rankine cycle KW - cascade KW - multicomponent working fluid KW - temperature-glide KW - pinch point KW - exergetice efficiency Y1 - 2018 U6 - https://doi.org/10.1016/j.applthermaleng.2017.11.137 VL - 131 SP - 958 EP - 964 PB - Elsevier ER - TY - JOUR A1 - Feseker, Daniel A1 - Kinell, Mats A1 - Neef, Matthias T1 - Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow JF - Journal of Turbomachinery N2 - The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties. KW - Compressor KW - Gas turbine engines KW - Turbine components KW - Boundary layer development KW - Fluid dynamics KW - Heat transfer KW - Measurement techniques KW - Film cooling KW - Heat transfer phenomena Y1 - 2018 U6 - https://doi.org/10.1115/1.4039842 VL - 140 IS - 7 CY - ASME ER - TY - GEN A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heizung, Lüftung, Weiße Ware - Ein integriertes Systemkonzept für das Haus der Zukunft T2 - KI Kälte Luft Klimatechnik N2 - In energieeffizienten Gebäuden spielt der Bedarf an Energie für die Raumheizung gegenüber der benötigten Energie für Warmwasser und zum Antrieb elektrischer Geräte eine zusehends untergeordnete Rolle. Die thermische Energie für elektrische Haushalts­geräte, wie Waschmaschine, Kühlschrank etc., wird für gewöhnlich dezentral im Gerät erzeugt. Vor diesem Hintergrund ist das Ziel eines Forschungsprojekts der Bau und der Test eines Funktionsmusters zur funktionalen und energetischen Kopplung der Haushaltsgeräte und der Heizungs- und Lüftungstechnik des Gebäudes. Grundgedanke dabei ist die Nutzung von Synergien bei Komponenten und Wärmeströmen, wie der Wärmepumpe als Kälteaggregat für den Kühlschrank, und die effiziente Nutzung von Abwärme der Haushaltsgeräte für die Warmwasserbereitung und Raumheizung. KW - Energieeffizienz KW - energiBUS4home Y1 - 2018 SN - 1865-5432 VL - 54 IS - 11 SP - 50 EP - 56 PB - Hüthig ER - TY - JOUR A1 - Bonk, Christian Dirk A1 - Laux, Christoph A1 - Rödder, Maximilian A1 - Neef, Matthias T1 - Design of a 1 KW Organic Rankine Cycle for Teaching and Research Issues JF - Energy Procedia N2 - This paper deals with the design of a micro-scale ORC plant for teaching and research including the development of an automated control concept. The aim is to provide a safe and environmentally acceptable micro-scale heat engine, which can be developed, implemented and used in university labs for the education of students as well as for small research projects. The test rig allows the support of several learning outcomes on a multi-disciplinary level particularly for the implementation and simulation of small power systems. Special attention was given to the organic working fluid characteristics and its selection process. In addition to the above-mentioned performance goals, favourable safety properties and low global warming potential were decisive in the selection of the novel organic fluid called 3M™ Novec™ 649. The performance and the fluid behaviour of Novec 649 in a micro-scale power cycle are of major interest and the research goal for the test rig presented in this paper. Due to the expected power output of 1 kW, a scroll expander was chosen as the generator drive for the micro plant. In order to design the major parts of the ORC, the thermodynamic simulation software EBSILON®Professional was used. The supply temperature was set to 140 °C. As a result of the simulation, feasible expander inlet pressures spread from 5.5 bar to 8.5 bar. This leads to thermal efficiencies of the ORC in the order of 5 %. Adding a recuperator to the cycle system decreases the operating pressure range but in the end, the thermal efficiency can be increased by 1.5 %-points up to 6.2 %. Finally, an automated control concept is introduced, where the pump is controlled via the fill level measurement system. KW - EBSILON®Professional KW - Micro-Scale ORC Plant KW - Teaching KW - Research KW - Automated Control Concept Y1 - 2017 U6 - https://doi.org/10.1016/j.egypro.2017.09.117 VL - 129 SP - 931 EP - 938 PB - Elsevier ER - TY - JOUR A1 - Neef, Matthias A1 - Zielke, Thomas A1 - Fussenecker, Claudia T1 - „Engineering Conferences“: Wissenschaftlich Kommunizieren im Master JF - Die Neue Hochschule Y1 - 2017 VL - 58 IS - 3 ER - TY - JOUR A1 - Roedder, Maximilian A1 - Neef, Matthias A1 - Laux, Christoph A1 - Priebe, Klaus-P. T1 - Systematic Fluid Selection for Organic Rankine Cycles and Performance Analysis for a Combined High and Low Temperature Cycle JF - Journal of Engineering for Gas Turbines and Power N2 - The organic Rankine cycle (ORC) is an established thermodynamic process that converts waste heat to electric energy. Due to the wide range of organic working fluids available the fluid selection adds an additional degree-of-freedom to the early design phase of an ORC process. Despite thermodynamic aspects such as the temperature level of the heat source, other technical, economic, and safety aspects have to be considered. For the fluid selection process in this paper, 22 criteria were identified in six main categories while distinguishing between elimination (EC) and tolerance criteria (TC). For an ORC design, the suggested method follows a practical engineering approach and can be used as a structured way to limit the number of interesting working fluids before starting a detailed performance analysis of the most promising candidates. For the first time, the selection process is applied to a two-stage reference cycle, which uses the waste heat of a large reciprocating engine for cogeneration power plants. It consists of a high temperature (HT) and a low temperature (LT) cycle in which the condensation heat of the HT cycle provides the heat input of the LT cycle. After the fluid selection process, the detailed thermodynamic cycle design is carried out with a thermodynamic design tool that also includes a database for organic working fluids. The investigated ORC cycle shows a net thermal efficiency of about 17.4% in the HT cycle with toluene as the working fluid and 6.2% in LT cycle with isobutane as the working fluid. The electric efficiency of the cogeneration plant increases from 40.4% to 46.97% with the both stages of the two-stage ORC in operation. KW - Gas Turbines KW - Cycle Innovations KW - Energy KW - Power systems KW - Fluids Y1 - 2016 U6 - https://doi.org/10.1115/1.4031361 VL - 138 IS - 031701 EP - 3 PB - ASME ER - TY - JOUR A1 - Wolter, Nina A1 - Zekorn, Thomas A1 - Neef, Matthias T1 - Stationäre thermodynamische Prozesssimulationen am Beispiel eines Industriekraftwerks JF - BWK: das Energie-Fachmagazin N2 - Um bauliche Veränderungen in bestehenden Kraftwerksprozessen auf ihre Wirkungsweise untersuchen und thermodynamisch beziehungsweise wirtschaftlich bewerten zu können, werden thermische Kraftwerksprozesse mit geeigneter Simulationssoftware abgebildet und in verschiedenen Detaillierungsstufen ausgelegt oder nachgerechnet. Im Folgenden wird ein Weg aufgezeigt, wie mit Hilfe einer stationären Simulationssoftware die Gesamtjahresbilanz eines Kraftwerks vorausberechnet werden kann. Mit Hilfe von Prozessdaten aus Vorjahren wird nachgewiesen, dass das Berechnungsmodell das bestehende Kraftwerk mit einer Abweichung von weniger als drei Prozent bezüglich erzeugter elektrischer Leistung und Brennstoffeinsatz und bei bekannter Dampfproduktion abbilden kann. Das so verifizierte Modell kann zur Untersuchung von Zubaumaßnahmen oder Veränderungen im Kraftwerksprozess eingesetzt werden. KW - Energiebilanz KW - Kraftwerk Y1 - 2016 VL - 68 IS - 6 SP - 6 EP - 10 ER - TY - CHAP A1 - Laux, Christoph A1 - Gotter, Andreas A1 - Neef, Matthias T1 - Experimental investigation of a low pressure steam Rankine cycle for waste heat utilization of internal combustion engines T2 - Proceedings of the 5th International Seminar on ORC Power Systems N2 - High heat losses via exhaust gas and coolant in internal combustion engines (ICE) are the basis for numerous investigations regarding downstream processes for power generation. The most promising concepts are Organic Rankine Cycles (ORC) and Steam Rankine Cycles (SRC). In previous work of the Center of Innovative Energy Systems, Düsseldorf (Germany), the technical and economic feasibility of a low pressure SRC has been investigated and the advantages in comparison to organic Rankine cycles are highlighted. A distinctive feature of the cycle is the use of the ICE coolant heat for evaporation, which limits the cycles maximum steam pressure to values below atmospheric pressure. This work presents first results of a test rig with data reconciliation according to DIN 2048 to validate the simulation results and design calculations. As a basis for the experimental investigations, a gas fired CHP plant was selected. The design of the test rig is optimized for the operation in the laboratory, where the coolant heat is emulated by a tempering device and the exhaust heat of the CHP plant is emulated by a gas burner. With the designed test rig, it is possible to control the volume flow and the temperatures of the coolant and exhaust gas, so that different load conditions of the gas fired CHP plant can be investigated. For initial tests, the turbine in the SRC is replaced by a throttle to achieve the pressure drop of the turbine. The experimental results show, that the exhaust and coolant heat of a 36 kWel CHP plant can be emulated and the performance expectations of the cycle can be met in stable steady-state conditions. Based on the measurement results and the turbine design calculations an electric power output of the cycle of 3.8 kW will be possible, which results in a cycle efficiency of about 6.5 % and an increase of the electrical power output of the CHP plant of about 10 %. The results show that the plant concept is technically feasible and, with further optimization, also represents an alternative to ORC plants in terms of increasing the efficiency of a cogeneration plant. Y1 - 2019 SN - 978-90-9032038-0 PB - The National Technical University of Athens (NTUA) CY - Athens ER - TY - CHAP A1 - Kramer, Tim A1 - Lerner, Igor A1 - Sacher, Patrick A1 - Neef, Matthias A1 - Baier, André ED - Dederichs-Koch, Andrea ED - Mohnert, Andrea ED - Kammasch, Gudrun T1 - Blue Engineering: Was ist das und wie gelingt die Implementierung an meiner Hochschule? T2 - Diversität und Kulturelle Vielfalt - Differenzieren, Individualisieren - oder Integrieren? Wege zu technischer Bildung : Referate der 13. Ingenieurpädagogischen Regionaltagung 2018 and der Hochschule Bochum vom 7.-9. Juni 2018 KW - Blue Engineering KW - Diversität Y1 - 2018 SN - 978-3-9818728-2-8 PB - Ingenieur-Pädagogische Wissensgesellschaft (IPW) CY - Berlin ER - TY - RPRT A1 - Neef, Matthias A1 - Laux, Christoph T1 - Optimierung des elektrischen Nutzungsgrades eines Blockheizkraftwerks durch Abwärmeverwertung in einem nachgeschalteten Dampfkraftprozess N2 - Abschlussbericht Förderung: Bundesministerium für Bildung und Forschung (BMBF) Förderkennzeichen: 03FH006I2 Projektzeitraum: 31.08.2012 -31.08.2015 Y1 - 2016 U6 - https://doi.org/10.2314/GBV:867675985 CY - Düsseldorf ER - TY - CHAP A1 - Helm, Peter A1 - Pugachev, Alexander A1 - Neef, Matthias T1 - Breaking the Swirl With Brush Seals: Numerical Modeling and Experimental Evidence T2 - Proceedings of the ASME Turbo Expo 2008 : presented at the 2008 ASME Turbo Expo, June 9 - 13, 2008, Berlin, Germany N2 - Striving for smaller losses in turbomachinery has led to many advancements in the design of seals. Modern sealing concepts such as brush seals hold a great potential to increase the efficiency of both flight engines and stationary turbines. At the same time, in order to maintain stable operating conditions of the rotor, swirl-induced forces must be kept at a minimum in the sealing channels. Therefore, the influence of the permeable and flexible bristle pack of brush seals on the flow around the rotor surface must be known. In this paper the swirl flow in the cavities of two different seal geometries is studied experimentally and numerically. A conventional three-tooth labyrinth serves as a reference. A second seal arrangement with a bristle pack upstream of two teeth is compared with the reference labyrinth. The swirl is evaluated experimentally from total and static pressure measurements in various axial and circumferential positions. Additionally, the axial swirl distribution is calculated using computational fluid dynamics (CFD). Here, the numerical model of the brush seal is based on the porous medium approach and is calibrated using the experimental values of the leakage and the bristle clearance by adjusting the thickness of the bristle pack. The calibrated CFD model is then used to study the impact of the brush seal on the swirl component of the sealing flow. The observed significant decrease of the swirl by the brush seal shows good agreement with the experimental data. The impact of changes in bristle pack clearance on the swirl is also investigated and compared with experimental evidence. The aim is to show that the brush seals have a natural tendency to interrupt seal swirl. They can therefore be used for swirl control in order to create a beneficial impact on the dynamic stability of turbomachines. Y1 - 2008 SN - 978-0-7918-4314-7 U6 - https://doi.org/10.1115/GT2008-50257 VL - 4 SP - 1387 EP - 1396 PB - ASME CY - New York ER - TY - CHAP A1 - Hurd, Paul A1 - Truckenmueller, Frank A1 - Thamm, Norbert A1 - Pollak, Helmut A1 - Neef, Matthias A1 - Deckers, Mathias T1 - Modern Reaction HP/IP Turbine Technology Advances and Experiences T2 - Proceedings of the ASME Power Conference - 2005 : includes papers from the 2005 International Conference on Power Engineering (ICOPE) ; presented at the 2005 ASME Power Conference, April 5 - 7, 2005, Chicago, Illinois, USA Y1 - 2005 UR - https://asmedigitalcollection.asme.org/POWER/proceedings/POWER2005/41820/425/311927 SN - 0-7918-4182-0 U6 - https://doi.org/10.1115/PWR2005-50085 SP - 425 EP - 435 PB - ASME CY - New York ER - TY - CHAP A1 - Völker, Lutz A1 - Casey, Michael A1 - Neef, Matthias A1 - Stüer, Heinrich T1 - The Flow Field and Performance of a Model Low Pressure Steam Turbine T2 - 6th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics : conference proceedings; 7-11 March 2005, Lille, France N2 - A 3-stage model of a low pressure steam turbine has been equipped with extensive instrumentation to assess aerodynamic performance and for validation of numerical methods. Emphasis was placed on detailed measurements at the inlet and exit of the last stage guide vane. Two configurations were examined – the first used a guide vane with lean in the last stage and a the second used a guide vane combining both lean and sweep. The experimental results from the two configurations have been compared with data from various design methods, ranging from through-flow to 3D multistage viscous simulations with mixing planes. Despite the challenges in modelling complex rotating blades in a wet steam environment, good agreement between the numerical and experimental results was obtained, and the new stator vane combining lean and sweep achieved the desired increase in reaction at the hub section. Y1 - 2005 CY - Lille ER - TY - CHAP A1 - Windte, Jan A1 - Radespiel, Rolf A1 - Neef, Matthias ED - Kroll, Norbert ED - Fassbender, Jens K. T1 - Aerodynamic Analysis of Flapping Airfoil Propulsion at Low Reynolds Numbers T2 - MEGAFLOW - Numerical Flow Simulation for Aircraft Design KW - Lift Curve KW - Chord Length KW - Pitch Motion KW - Laminar Separation Bubble KW - Combine Motion Y1 - 2005 SN - 978-3-540-24383-0 U6 - https://doi.org/10.1007/3-540-32382-1_21 VL - NNFM, 89 SP - 299 EP - 313 PB - Springer-Verlag CY - Berlin, Heidelberg ER - TY - CHAP A1 - Neef, Matthias A1 - Hummel, D. ED - Krause, Egon ED - Jäger, Willi T1 - Euler and Navier-Stokes Solutions for Flapping Wing Propulsion T2 - High Performance Computing in Science and Engineering ’01 KW - Wing Motion KW - Computational Fluid Dynamics KW - High Performance Computing KW - Thrust Coefficient Y1 - 2002 SN - 978-3-642-62719-4 U6 - https://doi.org/10.1007/978-3-642-56034-7_37 VL - 30 SP - 386 EP - 395 PB - Springer CY - Berlin ER - TY - CHAP A1 - Neef, Matthias A1 - Hummel, Dietrich ED - Mueller, Thomas J. T1 - Euler Solutions for a Finite-Span Flapping Wing T2 - Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications Y1 - 2001 SN - 978-1-56347-517-7 U6 - https://doi.org/10.2514/5.9781600866654.0429.0451 VL - 16 SP - 429 EP - 451 PB - American Institute of Aeronautics and Astronautics CY - Reston, VA ER - TY - JOUR A1 - Neef, Matthias A1 - Fritzen, J. P. A1 - Schumacher, G. T1 - Evaluation of mount loads in dynamic testing of a jet engine JF - Mechanical Systems and Signal Processing N2 - In the dynamic testing of jet engines the evaluation of loads on the mount structure is vital for comparison with finite element calculations of such testing. Measuring these loads with the help of strain gauges applied to the structure becomes difficult if the mount is overdetermined and thus not every strain gauge can be assigned to a single load direction. In this study, the overdetermined mount structure of the BR715 engine was examined at one of the three mounting points between the Boeing 717 airframe and the engine, where loads in five directions were reacted. Firstly, the dependence of five measured strains upon known static load conditions at the mounting point had to be determined. For this purpose a static calibration test was carried out where defined forces and moments in known directions were applied to the structure while the output from five strain gauges was measured accordingly. The result was the desired relationship between loads and strains in terms of a matrix, which yields the corresponding load condition of the examined mounting point if multiplied with a set of strains. The same calibration procedure was carried out with a finite element model of the mount, where direct comparison to dynamic load results from the model itself was possible. With this model the validity of the above method was shown as well as possible errors which may occur while evaluating dynamic test results. The method was found to give satisfactory results even for dynamic loading, although some inertia forces disturb the signals in dynamic testing. Finally, the results from an actual dynamic engine test were processed into loads and then compared to the simulated loads from a finite element model of the engine. Good agreement was found and the indication of any remaining discrepancies was used to update the model for an even better representation of the dynamic test loads. Y1 - 2003 UR - http://www.sciencedirect.com/science/article/pii/S0888327001914050 U6 - https://doi.org/10.1006/mssp.2001.1405 VL - 17 IS - 3 SP - 665 EP - 681 PB - Elsevier ER - TY - CHAP A1 - Jones, Kevin A1 - Castro, Breno A1 - Mahmoud, Osama A1 - Pollard, S. A1 - Platzer, Max A1 - Neef, Matthias A1 - Gonet, K. A1 - Hummel, D. T1 - A collaborative numerical and experimental investigation of flapping-wing propulsion T2 - 40th AIAA Aerospace Sciences Meeting & Exhibit N2 - An international, collaborative investigation is undertaken to evaluate the relative merits and limitations of various numerical methods and experimental measurement techniques, specifically for the analysis of flapping-wing propulsion. A finite aspect-ratio configuration is extensively investigated, both quantitatively and qualitatively, in a low-speed wind tunnel. Direct force measurements are made, as well as time-accurate and time-averaged laser Doppler velocimetry and unsteady flow visualization. The reduced frequency, mean angle of attack, aspect ratio and Reynolds number are varied in the experiments. The experiment is numerically simulated using flatplate theory, two and three-dimensional panel codes, and two and three-dimensional Euler and Navier- Stokes solvers. The ability of each of the methods to capture important aspects of the flow physics are evaluated through comparisons with each other and the experimental data. Additionally, the comparisons indicate areas where further research is needed. The collaborative effort provides a survey of available capabilities and provides a fixed set of flappingwing data for others to compare against. Y1 - 2002 UR - http://arc.aiaa.org/doi/book/10.2514/MASM02 U6 - https://doi.org/10.2514/6.2002-706 PB - American Institute of Aeronautics and Astronautics CY - Reston, Virigina ER - TY - CHAP A1 - Neef, Matthias A1 - aus der Wiesche, Stefan ED - aus der Wiesche, Stefan ED - Joos, Franz T1 - Aufbau und Wirkungsweise von Dampfturbinen: Grundlagen, Konstruktion, Betrieb T2 - Handbuch Dampfturbinen KW - Turbinen Y1 - 2018 SN - 978-3-658-20629-1 U6 - https://doi.org/10.1007/978-3-658-20630-7_2 SP - 27 EP - 83 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Feseker, Daniel A1 - Kinell, Mats A1 - Neef, Matthias ED - The American Society of Mechanical Engineers, T1 - Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow T2 - Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017 N2 - The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties. Y1 - 2017 UR - https://asmedigitalcollection.asme.org/GT/proceedings/GT2017/50886/Charlotte, North Carolina, USA/241903 SN - 978-0-7918-5088-6 U6 - https://doi.org/10.1115/GT2017-64143 PB - The American Society of Mechanical Engineers CY - New York ER - TY - CHAP A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heizung, Lüftung, Weiße Ware – ein integriertes Systemkonzept für das Haus der Zukunft T2 - Deutsche Kälte- und Klimatagung 2017 Bremen KW - Heizung KW - EnerTEG Y1 - 2017 SN - 9783932715938 SP - 1028 EP - 1041 CY - Stuttgart ER - TY - CHAP A1 - Neef, Matthias A1 - Zielke, Thomas A1 - Fussenecker, Claudia ED - Danish Network for Engineering Education, T1 - Engineering Conferences - An Innovative Course for Master Students in Engineering T2 - Exploring Teaching for Active Learning in Engineering Education N2 - This poster summarizes a few facts, figures and resources related to the Master course ”Engineering Conferences”. KW - Poster Y1 - 2017 SN - 978-87-998898-1-5 PB - Danish Network for Engineering Education (IUPN) CY - Odense ER - TY - CHAP A1 - Neef, Matthias A1 - Zielke, Thomas A1 - Fussenecker, Claudia ED - Danish Network for Engineering Education, T1 - Engineering Conferences - An Innovative Course for Master Students in Engineering T2 - Exploring Teaching for Active Learning in Engineering Education N2 - A course called "Engineering Conferences" is presented that the authors have developed and installed as a mandatory part of the curriculum in Master programs for engineering students. The idea is to go beyond teaching the standards of academic writing and skills for working with scientific publications. By using a learner-centered approach, we get the students engaged in typical activities around an active attendance of a real conference. They write a paper complying with common academic standards, submit the paper and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on campus. In this article, we present our rationale to develop the course and our results from the first semester teaching this course. This includes the presentation of useful resources for teaching and organizing scientific publishing as well as our reflected learning experience regarding the student's understanding of significance for scientific publishing. KW - Engineering Conference Y1 - 2017 SN - 978-87-998898-1-5 SP - 13 EP - 24 CY - Odense ER - TY - CHAP A1 - Zielke, Thomas A1 - Neef, Matthias A1 - Fussenecker, Claudia T1 - Teaching Engineering Conferences T2 - Proceedings of the Canadian Engineering Education Association (CEEA) Conference N2 - This article is on a university course called Engineering Conferences. It has been developed by the authors and installed as a mandatory part of the curriculum in three master’s degree programs for engineering students. The participants of the course are postgraduates with different nationalities, mostly German, and different technical backgrounds. They study Mechanical Engineering, Simulation and Experimental Technology, or International Business Engineering. The basic idea of the course concept goes far beyond simply teaching the standards of academic writing and skills for using scientific publications. By using a learnercentered approach, the students get engaged in typical activities around an active attendance of a real conference. Students learn to locate the field of their bachelor thesis or project report in the world of research communities, scientific journals and engineering conferences. They learn about conferences matching their bachelor/project topic. They write a paper complying with common academic standards, submit it to a mock-up conference, and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on the campus. Engineering Conferences is a course on scientific communication and presentation that also aims at the development of other skills and competences needed in the world of modern engineering. KW - Engineering Conferences Y1 - 2017 CY - Winnipeg ER - TY - CHAP A1 - Laux, Christoph A1 - Goebel, Johannes A1 - Neef, Matthias A1 - Gotter, Andreas T1 - Investigation in the Technical and Economic Feasibility of a Low-Pressure Steam Cycle for the Waste Heat Utilization of a Cogeneration Plant T2 - Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute N2 - This paper deals with the investigation in the technical and economic feasibility of a low-pressure steam cycle for the waste heat utilization of a combined heat and power (CHP) plant. The proposed steam cycle uses a pressure level below atmospheric pressure which allows to use the heat from the motor’s coolant for evaporation. The cycle is designed to increase the maximum electrical efficiency of a gas fired reciprocating engine and to increase operational flexibility for varying heat demand. Since organic Rankine cycle (ORC) plants are already being successfully used for waste heat recovery, advantages of the low-pressure steam Rankine cycle (SRC) over an ORC are highlighted. Many ORC fluids are toxic or flammable and thus have an increased risk potential compared to water. An additional advantage of water compared to ORC fluids is the possibility of superheating above 500 °C. The technical feasibility of the proposed cycle is studied by the detailed design of the individual system components such as turbine, heat exchangers and auxiliary parts. This includes the detailed thermodynamic design of the full cycle for the calculation of plant efficiencies. As a basis for future experimental investigations, a cogeneration plant with an electrical output of 50 kWel was selected as a heat source for the steam cycle. The design geometries of the turbine and the heat exchanger are presented along with efficiency and cost predictions. A subsonic radial turbine with a rotational speed of 155,000 rpm was selected. The maximum turbine output is about 7.5 kW. The use of a flash evaporator is investigated to reduce the size and the costs for the evaporator. The suggested steam cycle helps to increase the electrical efficiency of the CHP plant by 4.5% points from an original 36.5% to 41.0%. The steam cycle itself has an electrical efficiency of approximately 9%. Additionally, the condensation temperature in this steam cycle is high enough to be extracted as useful heat output to generate domestic water with a temperature of 50°C. Y1 - 2015 SN - 978-0-7918-5667-3 VL - 3: Coal, biomass and alternative fuels - cycle innovations - electric power - industrial and cogeneration PB - International Gas Turbine Institute (ASME) CY - New York ER - TY - CHAP A1 - Rödder, Maximilian A1 - Laux, Christoph A1 - Neef, Matthias T1 - Systematic fluid selection in early stages of ORC design: a practical engineering approach T2 - Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute Y1 - 2015 SN - 978-0-7918-5667-3 VL - 3: Coal, biomass and alternative fuels - cycle innovations - electric power - industrial and cogeneration PB - International Gas Turbine Institute (ASME) CY - New York ER - TY - CHAP A1 - Rödder, Maximilian A1 - Spiegel, Thomas A1 - Frank, Lena A1 - Neef, Matthias A1 - Adam, Mario ED - Großmann, Uwe ED - Kunold, Ingo T1 - Integration eines multifunktionalen Wärmepumpensystems als Hardware-in-the-Loop in ein Niederspannungsnetzmodell T2 - Smart Energy and Systems 2019: Digitalisierung - Anwendungen in Technik und Industriegesellschaft, 10. Fachtagung, 04.-05.11.2019, Dortmund KW - energiBUS4home Y1 - 2019 SP - 70 EP - 77 PB - vwh Verlag Werner Hülsbusch Fachverlag für Medientechnik und -wirtschaft CY - Glückstadt ER - TY - CHAP A1 - Neef, Matthias A1 - André, Baier T1 - Blue Engineering: Ingenieur_innen mit ökologischer und sozialer Verantwortung - ein Studierenden-getriebenes, modulares Seminar-Konzept T2 - DGHD-Jahrestagung KW - Poster Y1 - 2019 UR - https://www.researchgate.net/publication/331327194_Blue_Engineering_Ingenieur_innen_mit_okologischer_und_sozialer_Verantwortung_-_ein_Studierenden-getriebenes_modulares_Seminar-Konzept PB - Universität Leipzig CY - Leipzig ER - TY - JOUR A1 - Deckert, Carsten A1 - Kalefeld, Jannik A1 - Kutz, Martin T1 - Geschäftsmodelle für das Internet der Dinge: Welche Geschäftsmodellinnovation passt zum Unternehmen? JF - ZWF Zeitschrift für wirtschaftlichen Fabrikbetrieb Y1 - 2020 U6 - https://doi.org/10.3139/104.112265 SN - 0947-0085 VL - 115 IS - 12 SP - 928 EP - 933 PB - Hanser ER - TY - BOOK A1 - Kiel, Jürgen T1 - Einführung in die elektrische Energie- und Antriebstechnik N2 - Die zunehmende Automatisierung und der sensible Umgang mit (elektrischer) Energie spielen in der gesellschaftlichen Diskussion eine zunehmende Rolle. Die technischen Hintergründe sind hierbei nicht nur für die jeweiligen Experten von Bedeutung, sondern sind auch selbstverständlich Grundlagenwissen im Maschinenbau, in der Verfahrenstechnik und in der Energietechnik. Für genau diese Zielgruppe ist dieses Buch konzipiert. Um eine möglichst große Bandbreite an Themen abzudecken, wurde in vielen Bereichen vereinfacht, verkürzt und verallgemeinert, um zumindest den Kern der jeweiligen Problematik verständlich zu machen. Daher wird auch als Voraussetzung lediglich das Verständnis des elektrischen Kreises mit ohm’schen, induktiven und kapazitiven Verbrauchern erwartet. Außerdem wurde der Spagat zwischen Grundlagen- und Praxiswissen gewagt. KW - Leistungselektronik KW - Drehstrommaschine KW - Frequenzumrichter KW - Maschinenbau KW - Gleichstrommaschine KW - Einführung KW - Transformator KW - Servoregler Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-23945 SN - 978-3-941334-31-1 CY - Düsseldorf ER - TY - CHAP A1 - Deckert, Carsten A1 - Stodick, Klaus A1 - Hertz-Eichenrode, David ED - Proff, Heike T1 - Nachhaltige Paketauslieferung mit Mikro-Depots T2 - Making Connected Mobility Work: Technische und betriebswirtschaftliche Aspekte KW - City Logistik KW - Paketlieferung KW - Mikro-depot Y1 - 2021 SN - 978-3-658-32265-6 U6 - https://doi.org/10.1007/978-3-658-32266-3_34 SP - 549 EP - 561 PB - Springer CY - Wiesbaden ER - TY - JOUR A1 - Schittkowski, Julian A1 - Ruland, Holger A1 - Laudenschleger, Daniel A1 - Girod, Kai A1 - Kähler, Kevin A1 - Kaluza, Stefan A1 - Muhler, Martin A1 - Schlögl, Robert T1 - Methanol Synthesis from Steel Mill Exhaust Gases: Challenges for the Industrial Cu/ZnO/Al 2 O 3 Catalyst JF - Chemie Ingenieur Technik Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34526 SN - 1522-2640 N1 - We gratefully appreciate the support received from the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF, Verbundvorhaben Carbon2Chem®). VL - 90 IS - 10 SP - 1419 EP - 1429 PB - Wiley ER - TY - CHAP A1 - Lippel, Jens A1 - Becker, Martin A1 - Zielke, Thomas ED - Obaidat, Mohammad S. ED - Ören, Tuncer ED - Szczerbicka, Helena T1 - Modeling Dynamic Processes with Deep Neural Networks: A Case Study with a Gas-fired Absorption Heat Pump T2 - SIMULTECH 2019: Proceedings of the 9th International Conference on Simulation and Modeling Methodologies, Technologies and Applications : Prague, Czech RepublicJuly 29-31, 2019 Y1 - 2019 SN - 978-989-758-381-0 U6 - https://doi.org/10.5220/0007932903170326 SP - 317 EP - 326 PB - INSTICC ER - TY - CHAP A1 - Faber, Christian A1 - Anthrakidis, Anette A1 - Lanz, Marco A1 - Rusack, Markus A1 - Weis, Fabian A1 - Adam, Mario A1 - Schramm, Sebastian T1 - Barriers to solar process heat applications, T2 - SWC 2011: ISES Solar World Congress, 28 August - 2 September 2011, Kassel, Germany KW - Solare-Prozesswärme-Standards Y1 - 2011 UR - https://proceedings.ises.org/swc2011/proceedings/PDF/Papers.pdf SP - 1326 EP - 1334 CY - Kassel ER - TY - CHAP A1 - Zielke, Thomas A1 - Bernst, Irina A1 - Crombach, Tobias A1 - Becker, Martin A1 - Lippel, Jens ED - Gómez Chova, Luis ED - López Martínez, A. ED - Candel Torres, I. T1 - WHAT CAN BE LEARNED BY GRADING ANALYTICS? T2 - INTED 2018: 12th International Technology, Education and Development Conference : 5-7 March, 2018, Valencia (Spain) : conference proceedings Y1 - 2018 SN - 978-84-697-9480-7 U6 - https://doi.org/10.21125/inted.2018.0593 VL - 12th International Technology, Education and Development Conference SP - 3097 EP - 3106 PB - IATED Academy CY - Valencia, Spain ER - TY - CHAP A1 - Becker, Martin A1 - Lippel, Jens A1 - Zielke, Thomas ED - Vezzani, Roberto T1 - Dimensionality Reduction for Data Visualization and Linear Classification, and the Trade-off between Robustness and Classification Accuracy T2 - Proceedings of ICPR 2020: 25th International Conference on Pattern Recognition, 10-15 January 2021, Milan Y1 - 2021 SN - 978-1-72818-808-9 U6 - https://doi.org/10.1109/ICPR48806.2021.9412865 SP - 6478 EP - 6485 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Becker, Martin A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Gradient Descent Analysis: On Visualizing the Training of Deep Neural Networks T2 - VISIGRAPP 2019: Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications : Prague, Czech Republic, February 25-27, 2019 Y1 - 2019 SN - 978-989-758-354-4 U6 - https://doi.org/10.5220/0007583403380345 VL - Volume: 3 SP - 338 EP - 345 PB - INSTICC ER - TY - BOOK A1 - Marzi, Thomas A1 - Deerberg, Görge A1 - Dötsch, Christian A1 - Grevé, Anna A1 - Hiebel, Markus A1 - Stefan Kaluza, A1 - Knappertsbusch, Volker A1 - Maga, Daniel A1 - Müller, Torsten A1 - Pflaum, Hartmut A1 - Pohlig, Astrid A1 - Renner, Manfred A1 - Seifert, Ulrich A1 - Stießel, Sebastian A1 - Unger, Christoph A1 - Wack, Thorsten A1 - Weidner, Eckhard T1 - Kohlendioxid, Biomasse und Regenerativer Strom - Ressourcen einer neuen Kohlenstoffwirtschaft? Y1 - 2017 SN - 978-3-87468-358-6 U6 - https://doi.org/10.24406/UMSICHT-N-473349 VL - Umsicht-Diskurs IS - 1 PB - Fraunhofer-Institut für Umwelt-, Sicherheit- und Energietechnik CY - Oberhausen ER - TY - JOUR A1 - Schmidt, Stefan A1 - Göbel, Christoph A1 - Nebel, Janine A1 - Wiesmann, Thomas A1 - Hamel, Christian A1 - Reinsdorf, Arne A1 - Wolf, Dorit A1 - Gehrmann, Stefan A1 - Tenhumberg, Nils A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - Recent Developments in the Conversion of Synthesis Gas to Short-Chain Alcohols over Cu-Co-Based Catalysts JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201800023 SN - 1522-2640 VL - 90 IS - 10 SP - 1465 EP - 1475 PB - Wiley ER - TY - JOUR A1 - Weide, Philipp A1 - Schulz, Katharina A1 - Kaluza, Stefan A1 - Rohe, Markus A1 - Beranek, Radim A1 - Muhler, Martin T1 - Controlling the Photocorrosion of Zinc Sulfide Nanoparticles in Water by Doping with Chloride and Cobalt Ions JF - Langmuir Y1 - 2016 UR - http://www.ncbi.nlm.nih.gov/pubmed/27934521 U6 - https://doi.org/10.1021/acs.langmuir.6b03385 SN - 1520-5827 VL - 32 IS - 48 SP - 12641 EP - 12649 PB - ACS Publ. ER - TY - CHAP A1 - Becker, Martin A1 - Lippel, Jens A1 - Stuhlsatz, André T1 - Regularized Nonlinear Discriminant Analysis - An Approach to Robust Dimensionality Reduction for Data Visualization T2 - Proceedings of the 12th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, 27.02.2017 - 01.03.2017, Porto, Portugal Y1 - 2017 SN - 978-989-758-228-8 U6 - https://doi.org/10.5220/0006167501160127 SP - 116 EP - 127 PB - SCITEPRESS - Science and Technology Publications ER - TY - CHAP A1 - Stuhlsatz, Andre A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Discriminative feature extraction with Deep Neural Networks T2 - The 2010 International Joint Conference on Neural Networks (IJCNN), 18.07.2010 - 23.07.2010, Barcelona, Spain Y1 - 2010 UR - http://ieeexplore.ieee.org/document/5596329/ SN - 978-1-4244-6916-1 U6 - https://doi.org/10.1109/IJCNN.2010.5596329 SP - 1 EP - 8 PB - IEEE ER - TY - JOUR A1 - Schulzke, Tim A1 - Conrad, Stefan A1 - Kaluza, Stefan A1 - van Loo, Tom T1 - Upgrading of fast pyrolysis condensates via esterification with higher alcohols JF - Biomass and Bioenergy Y1 - 2017 U6 - https://doi.org/10.1016/j.biombioe.2017.05.010 SN - 0961-9534 N1 - Postprint ist veröffentlicht unter: http://publica.fraunhofer.de/dokumente/N-446003.html VL - 103 SP - 11 EP - 20 PB - Elsevier ER - TY - JOUR A1 - Wiesmann, Thomas A1 - Hamel, Christian A1 - Kaluza, Stefan T1 - Techniques to Remove Traces of Oxygen by Catalytic Conversion from Gas Mixtures JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201800022 SN - 1522-2640 VL - 90 IS - 10 SP - 1446 EP - 1452 PB - Wiley ER - TY - JOUR A1 - Titus, Juliane A1 - Kaluza, Stefan A1 - Marschall, Roland T1 - German Catalysis on an International Scale in Weimar JF - ChemCatChem Y1 - 2014 U6 - https://doi.org/10.1002/cctc.201402266 SN - 1867-3899 VL - 6 IS - 6 SP - 1523 EP - 1525 PB - Wiley ER - TY - JOUR A1 - Kaluza, Stefan A1 - Behrens, Malte A1 - Schiefenhövel, Nora A1 - Kniep, Benjamin A1 - Fischer, Richard A1 - Schlögl, Robert A1 - Muhler, Martin T1 - A Novel Synthesis Route for Cu/ZnO/Al2O3 Catalysts used in Methanol Synthesis: Combining Continuous Consecutive Precipitation with Continuous Aging of the Precipitate JF - ChemCatChem Y1 - 2011 U6 - https://doi.org/10.1002/cctc.201000329 SN - 1867-3899 VL - 3 IS - 1 SP - 189 EP - 199 PB - Wiley ER - TY - JOUR A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the Role of Aging, Washing, and Drying in the Synthesis of Polycrystalline Zinc Oxide by Precipitation: Combining Fast Continuous Mixing, Spray Drying and Freeze Drying to Unravel the Solid-State Transformations of the Precipitate JF - Catalysis Letters Y1 - 2009 UR - 1572-879X U6 - https://doi.org/10.1007/s10562-008-9818-5 N1 - The authors gratefully acknowledge fruitful discussions with Malte Behrens and Robert Schlögl, and the financial support by the BMBF (Bundesministerium für Bildung und Forschung) within the scope of the project 01RI05028 “Entwicklung von Methanolsynthesekatalysatoren als Basis für nachhaltige Ressourcennutzung” VL - 129 IS - 3-4 SP - 287 EP - 292 PB - Springer ER - TY - CHAP A1 - Kaluza, Stefan A1 - Muhler, Martin ED - Gaigneaux, E. M. ED - Devillers, M. ED - Hermans, S. ED - Jacobs, P. A. ED - Martens, J. A. ED - Ruiz, P. T1 - A novel continuous approach for the synthesis and characterization of pure and mixed metal oxide systems applied in heterogeneous catalysis T2 - Scientific Bases for the Preparation of Heterogeneous Catalysts Y1 - 2010 SN - 978-0-444-53601-3 U6 - https://doi.org/10.1016/S0167-2991(10)75027-8 VL - Studies in Surface Science and Catalysis, 175 SP - 217 EP - 220 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Mei, Bastian A1 - Sánchez, Miguel D. A1 - Reinecke, Thomas A1 - Kaluza, Stefan A1 - Xia, Wei A1 - Muhler, Martin T1 - The synthesis of Nb-doped TiO2 nanoparticles by spray drying: an efficient and scalable method JF - Journal of Materials Chemistry Y1 - 2011 U6 - https://doi.org/10.1039/c1jm11431j SN - 1364-5501 VL - 21 IS - 32 SP - 11781 EP - 11790 PB - Royal Society of Chemistry (RSC) ER - TY - JOUR A1 - Kaluza, Stefan A1 - Schröter, Marie Katrin A1 - Naumann d'Alnoncourt, Raoul A1 - Reinecke, Thomas A1 - Muhler, Martin T1 - High Surface Area ZnO Nanoparticles via a Novel Continuous Precipitation Route JF - Advanced Functional Materials Y1 - 2008 U6 - https://doi.org/10.1002/adfm.200800457 SN - 1616-3028 N1 - The authors gratefully acknowledge fruitful discussions with Malte Behrens and Robert Schlögl, and financial support by the BMBF (Bundesministerium für Bildung und Forschung, project 01RI05028 “Entwicklung von Methanolsynthesekatalysatoren als Basis für nachhaltige Ressourcennutzung”). Supporting Information is available online from Wiley InterScience or from the author. VL - 18 IS - 22 SP - 3670 EP - 3677 ER - TY - JOUR A1 - Peter, Maximilian A1 - Fichtl, Matthias B. A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin A1 - Hinrichsen, Olaf T1 - Detailed kinetic modeling of methanol synthesis over a ternary copper catalyst JF - Chemical Engineering Journal Y1 - 2012 U6 - https://doi.org/10.1016/j.cej.2012.06.066 SN - 0009-2509 VL - 203 SP - 480 EP - 491 PB - Elsevier ER - TY - JOUR A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the precipitation mechanism and the role of the post-precipitation steps during the synthesis of binary ZnO–Al2O3 composites with high specific surface area JF - Journal of Materials Chemistry KW - FBMV Y1 - 2009 U6 - https://doi.org/10.1039/b902004g SN - 1364-5501 VL - 19 IS - 23 SP - 3914 EP - 3922 PB - Royal Society of Chemistry (RSC) ER - TY - JOUR A1 - Girod, Kai A1 - Lohmann, Heiko A1 - Kaluza, Stefan T1 - Methanol Synthesis with Steel Mill Gases: Performance Investigations in an On‐Site Technical Center JF - Chemie Ingenieur Technik KW - DEAL Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34409 SN - 1522-2640 N1 - he investigations within the scope of the project Carbon2Chem® are funded by the German Federal Ministry of Education and Research (BMBF; support code: 03EK3039F). We also thank our project partners in the Carbon2Chem subproject L2 (methanol synthesis) for the trustful cooperation. Open access funding enabled and organized by Projekt DEAL. VL - 93 IS - 5 SP - 850 EP - 855 PB - Wiley ER - TY - JOUR A1 - Junge Puring, Kai A1 - Piontek, Stefan A1 - Smialkowski, Mathias A1 - Burfeind, Jens A1 - Kaluza, Stefan A1 - Doetsch, Christian A1 - Apfel, Ulf-Peter T1 - Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications JF - Journal of visualized experiments : JoVE N2 - The rock material pentlandite with the composition Fe4.5Ni4.5S8 was synthesized via high temperature synthesis from the elements. The structure and composition of the material was characterized via powder X-ray diffraction (PXRD), Mössbauer spectroscopy (MB), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and energy dispersive X-ray spectroscopy (EDX). Two preparation methods of pentlandite bulk electrodes are presented. In the first approach a piece of synthetic pentlandite rock is directly contacted via a wire ferrule. The second approach utilizes pentlandite pellets, pressed from finely ground powder, which is immobilized in a Teflon casing. Both electrodes, whilst being prepared by an additive-free method, reveal high durability during electrocatalytic conversions in comparison to common drop-coating methods. We herein showcase the striking performance of such electrodes to accomplish the hydrogen evolution reaction (HER) and present a standardized method to evaluate the electrocatalytic performance by electrochemical and gas chromatographic methods. Furthermore, we report stability tests via potentiostatic methods at an overpotential of 0.6 V to explore the material limitations of the electrodes during electrolysis under industrial relevant conditions. Y1 - 2017 UR - http://www.ncbi.nlm.nih.gov/pubmed/28671654 U6 - https://doi.org/10.3791/56087 SN - 1940-087X IS - 124 PB - JoVE ER - TY - JOUR A1 - Girod, Kai A1 - Breitkreuz, Klaas A1 - Henning, Torsten A1 - Lohmann, Heiko A1 - Kaluza, Stefan A1 - Schluter, Stefan T1 - Steel Mills as Syngas Source for Methanol Synthesis: Simulation and Practical Performance Investigations JF - Chemical Engineering Transactions N2 - In the present contribution, the utilization of steel-mill gases for an industrial methanol synthesis process is described. The focus of this work is on the influence of syngas compositions derived from steel-mill gases on an industrial Cu/ZnO/Al2O3 catalyst. Elevated CO2 and H2O concentrations seem to have an irreversible impact on the activity of the catalyst. In order to obtain realistic gas composition for the catalyst tests, a process simulation of the methanol synthesis was conducted. The calculated gas compositions at the reactor inlet were applied in a practical test in order to evaluate the catalyst stability under steel mill gas conditions. No noticeable deactivation was observed. KW - DOAJ Y1 - 2019 SN - 978-88-95608-71-6 U6 - https://doi.org/10.3303/CET1974080 SN - 2283-9216 VL - 74 SP - 475 EP - 480 PB - AIDIC ER - TY - JOUR A1 - Girod, Kai A1 - Breitkreuz, Klaas A1 - Gerstner, Andrea A1 - Marzi, Thomas A1 - Schulzke, Tim A1 - Kaluza, Stefan T1 - Close‐to‐Practice Investigations of Heterogeneously Catalyzed Syngas Conversions in Slurry and Fixed‐Bed Reactor Systems JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201700143 SN - 1522-2640 VL - 90 IS - 5 SP - 690 EP - 695 PB - Wiley ER - TY - CHAP A1 - Hamel, Christian A1 - Kaluza, Stefan A1 - Unger, Christoph ED - Ernst, Stefan T1 - Catalytic tar reforming of biomass-derived synthesis gas: Influence of the catalyst, gas composition and sulfur poisoning T2 - Preprints of the DGMK-Conference "Synthesis Gas Chemistry",October 7 - 9, 2015, Dresden Y1 - 2015 SN - 978-3-941721-56-2 VL - DGMK Tagungsbericht, 2015,2 SP - 139 EP - 146 PB - DGMK CY - Hamburg ER - TY - JOUR A1 - Engeldahl, Barthel A1 - Özaslan, Mehtap A1 - Marschall, Roland A1 - Rose, Marcus A1 - Kaluza, Stefan A1 - Titus, Juliane A1 - Sprung, Christoph T1 - Weimar 2015: Catalysing Tomorrow’s Solutions JF - ChemCatChem Y1 - 2015 U6 - https://doi.org/10.1002/cctc.201500435 SN - 1867-3899 VL - 7 IS - 12 SP - 1794 EP - 1796 PB - Wiley ER - TY - JOUR A1 - Heeskens, Denise A1 - Aghaei, Pedram A1 - Kaluza, Stefan A1 - Strunk, Jennifer A1 - Muhler, Martin T1 - Selective oxidation of ethanol in the liquid phase over Au/TiO 2 JF - physica status solidi (b) Y1 - 2013 U6 - https://doi.org/10.1002/pssb.201248440 SN - 1521-3951 VL - 250 IS - 6 SP - 1107 EP - 1118 PB - Wiley ER - TY - JOUR A1 - Boz, İsmail A1 - Kaluza, Stefan A1 - Boroğlu, Mehtap Şafak A1 - Muhler, Martin T1 - Synthesis of high surface area ZnO powder by continuous precipitation JF - Materials Research Bulletin Y1 - 2012 U6 - https://doi.org/10.1016/j.materresbull.2012.02.005 SN - 1873-4227 VL - 47 IS - 5 SP - 1185 EP - 1190 PB - Elsevier ER - TY - JOUR A1 - Engel, Rebecca V. A1 - Kaluza, Stefan A1 - Oezaslan, Mehtap A1 - Peitz, Stephan T1 - German Catalysis Meeting - 50 Years and as Young as Ever JF - ChemCatChem Y1 - 2017 U6 - https://doi.org/10.1002/cctc.201700683 SN - 1867-3899 VL - 9 IS - 11 SP - 2018 EP - 2020 PB - Wiley ER - TY - JOUR A1 - Bordoloi, Ankur A1 - Sanchez, Miguel A1 - Noei, Heshmat A1 - Kaluza, Stefan A1 - Großmann, Dennis A1 - Wang, Yuemin A1 - Grünert, Wolfgang A1 - Muhler, Martin T1 - Catalytic Behaviour of Mesoporous Cobalt-Aluminum Oxides for CO Oxidation JF - Journal of Catalysts Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34344 SN - 2314-5110 SP - 1 EP - 9 PB - Hindawi ER - TY - CHAP A1 - Anton, Johan A1 - Nebel, Janine A1 - Froese, Christian A1 - Kleinschmidt, Ralph A1 - Quandt, Thomas A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin ED - Ernst, Stefan T1 - Higher alcohol synthesis over Na-modified Co-Cu catalysts: Co2C formation and effect of surface composition T2 - Preprints of the DGMK-Conference "Synthesis Gas Chemistry", October 7 - 9, 2015, Dresden N2 - Cu–Co-based model catalysts were prepared by a sophisticated alkali-free synthesis method and tested in the conversion of synthesis gas to higher alcohols. MoO3-coated alumina was used as the support, providing both high specific surface area and strongly interacting sites for the deposition of the active metals. A bulk Cu/Co ratio of ~2 was found to be most suitable in terms of activity and product distribution. Surface enrichment of Mo for all samples was observed by XPS, which significantly influenced the performance of the catalysts. Mo was found to be both a structural and a chemical promoter. Strong metal–support interactions were further achieved by modification of alumina with magnesia. With 12 wt% Mg incorporated, the catalysts showed 40% total oxygenate selectivity including 11% selectivity to ethanol. Y1 - 2015 SN - 978-3-941721-56-2 VL - DGMK Tagungsbericht, 2015,2 PB - DGMK CY - Hamburg ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Song, Huiqing A1 - Froese, Christian A1 - Weide, Philipp A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - The effect of sodium on the structure–activity relationships of cobalt-modified Cu/ZnO/Al2O3 catalysts applied in the hydrogenation of carbon monoxide to higher alcohols JF - Journal of Catalysis Y1 - 2016 U6 - https://doi.org/10.1016/j.jcat.2015.12.016 SN - 0021-9517 VL - 335 SP - 175 EP - 186 PB - Elsevier ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Song, Huiqing A1 - Froese, Christian A1 - Weide, Philipp A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - Structure–activity relationships of Co-modified Cu/ZnO/Al2O3 catalysts applied in the synthesis of higher alcohols from synthesis gas JF - Applied Catalysis A: General Y1 - 2015 U6 - https://doi.org/10.1016/j.apcata.2015.07.002 SN - 0926-860X VL - 505 SP - 326 EP - 333 PB - Elsevier ER - TY - JOUR A1 - Anton, Johan A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - Fast and Reproducible Testing of Cu–Co-Based Catalysts Applied in the Conversion of Synthesis Gas to Ethanol and Higher Alcohols JF - Catalysis Letters Y1 - 2015 U6 - https://doi.org/10.1007/s10562-015-1543-2 N1 - The work was part of the project “Bioethanol from synthesis gas—BETSY”, funded by the Ministry for Economy, Energy, Building, Habitation and Transportation of Northrhine-Westphalia within the program Ziel2.NRW financed by the European Union through the European regional development fund ERDF. VL - 145 IS - 7 SP - 1374 EP - 1381 PB - Springer ER - TY - JOUR A1 - Westkämper, Engelbert A1 - Niemann, Jörg A1 - Stolz, M. T1 - Digital information—potentials for TeleX applications JF - Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Y1 - 2002 U6 - https://doi.org/10.1243/0954405021520319 SN - 2041-2975 SN - 0954-4054 VL - 216 IS - 5 SP - 801 EP - 808 PB - sage journals ER - TY - JOUR A1 - Westkämper, Engelbert A1 - Niemann, Jörg A1 - Dauensteiner, A. T1 - Economic and ecological aspects in product life cycle evaluation JF - Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Y1 - 2001 U6 - https://doi.org/10.1243/0954405011518601 SN - 2041-2975 VL - 215 IS - 5 SP - 673 EP - 681 PB - sage journals ER - TY - CHAP A1 - Linditsch, Claudia A1 - Fussenecker, Claudia A1 - Niemann, Jörg A1 - Messnarz, Richard A1 - Penz, Eva A1 - Casey, Anette A1 - Stolfa, Jakub ED - Larrucea, Xabier ED - Santamaria, Izaskun ED - O'Connor, Rory V. ED - Messnarz, Richard T1 - ELIC – Building the New Generation of Engineers for Automotive in Europe T2 - Systems, Software and Services Process Improvement. 25th European Conference, EuroSPI 2018, Bilbao, Spain, September 5-7, 2018, Proceedings Y1 - 2018 SN - 978-3-319-97924-3 U6 - https://doi.org/10.1007/978-3-319-97925-0_55 SP - 654 EP - 665 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Ardelean-Baidoc, Raluca A1 - Oniga, Gabriel A1 - Niemann, Jörg A1 - Sava, Adriana A1 - Pîslă, Adrian A1 - (Keine Angabe), T1 - Change Management Aspects in Developing the International Airport “Avram Iancu” Cluj T2 - The proceedings of the 14th European Conference on Innovation and Entrepreneurship, 19-20 September 2019 Y1 - 2019 SN - 9781912764358 U6 - https://doi.org/10.34190/ECIE.19.092 PB - ACPI ER - TY - CHAP A1 - Niemann, Jörg A1 - Fussenecker, Claudia A1 - Schlösser, Martin ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Toolbox of Methods for the Digital Business Transformation T2 - Systems, Software and Services Process Improvement KW - FBMV Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_59 SP - 783 EP - 793 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Niemann, Jörg A1 - Westkämper, Engelbert ED - Brissaud, Daniel ED - Tichkiewitch, Serge ED - Zwolinski, Peggy T1 - Dynamic life cycle performance simulation of production systems T2 - Innovation in Life Cycle Engineering and Sustainable Development Y1 - 2006 SN - 978-1-4020-4601-8 U6 - https://doi.org/10.1007/1-4020-4617-0_29 SP - 419 EP - 428 PB - Springer Netherlands CY - Dordrecht ER - TY - JOUR A1 - Dehmer, Joanna A1 - Kutzera, Ana-Alicia A1 - Niemann, Jörg T1 - Digitalisierung von Geschäftsmodellen durch plattformbasiertes Value Chain Management JF - zwf – Zeitschrift für wirtschaftlichen Fabrikbetrieb Y1 - 2017 U6 - https://doi.org/10.3139/104.111697 SN - 0947-0085 VL - 112 IS - 4 SP - 253 EP - 256 PB - Hanser ER - TY - CHAP A1 - Trofimov, Igor A1 - Jahr, Andreas T1 - Zeitsignale im Massenstrom eines Linearschwingförderers zur Nutzung für Regelungsaufgaben T2 - IFToMM D-A-CH Konferenz / Vierte IFToMM D-A-CH Konferenz 2018 Y1 - 2018 U6 - https://doi.org/10.17185/duepublico/45302 SP - 1 EP - 9 PB - DuEPublico CY - Duisburg-Essen ER - TY - JOUR A1 - Westkämper, Engelbert A1 - Niemann, Jörg A1 - Stierle, Thomas T1 - Systemorientierte Produktionsstrukturen für den Werkzeugmaschinenbau JF - zwf – Zeitschrift für wirtschaftlichen Fabrikbetrieb Y1 - 2004 U6 - https://doi.org/10.3139/104.100805 SN - 0947-0085 VL - 99 IS - 9 SP - 461 EP - 464 PB - Hanser ER - TY - JOUR A1 - Niemann, Jörg A1 - Westkämper, Engelbert T1 - Lebenslaufumfassende Wirtschaftlichkeitsbetrachtungen JF - zwf – Zeitschrift für wirtschaftlichen Fabrikbetrieb KW - FBMV Y1 - 2003 U6 - https://doi.org/10.3139/104.100611 SN - 0947-0085 VL - 98 IS - 1-2 SP - 50 EP - 53 PB - Hanser ER - TY - GEN ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Systems, Software and Services Process Improvement T2 - Communications in Computer and Information Science Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4 VL - 1251 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Macher, Georg A1 - Brenner, Eugen A1 - Messnarz, Richard A1 - Ekert, Damjan A1 - Stolfa, Jakub A1 - Stolfa, Svatopluk A1 - Niemann, Jörg A1 - Fussenecker, Claudia A1 - Schoening, Marius A1 - Paul, Alexander A1 - Pavlov, Nikolay A1 - Gigov, Boyko A1 - Pavlova, Maria Stefanova ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - A Study of Electric Powertrain Engineering - Its Requirements and Stakeholders Perspectives T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_29 SP - 396 EP - 407 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Fussenecker, Claudia A1 - Niemann, Jörg A1 - Paul, Alexander A1 - Schlösser, Martin A1 - Schöning, Marius ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Educating Future Engineers – Meeting Challenges at Secondary School and University T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_56 SP - 742 EP - 753 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Yang, Zhengxiong A1 - Kollmannsberger, Stefan A1 - Düster, Alexander A1 - Ruess, Martin A1 - Garcia, Eduardo Grande A1 - Burgkart, Rainer A1 - Rank, Ernst T1 - Non-standard bone simulation: interactive numerical analysis by computational steering JF - Computing and Visualization in Science Y1 - 2011 U6 - https://doi.org/10.1007/s00791-012-0175-y VL - 14 IS - 5 SP - 207 EP - 216 PB - Springer ER - TY - CHAP A1 - Wendland, André A1 - Bumann, Marc A1 - Martin, Shane A1 - Niemann, Jörg A1 - Bosman, Stephen ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Optimizing System Design Through Thermal Analysis with Cubesatellite as Case Study T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_30 SP - 408 EP - 420 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Kretschmar, Dominik A1 - Niemann, Jörg A1 - Müller, Felix ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Spin-Off Strategies of Established Companies Due to Digitalization and Disruption T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_58 SP - 772 EP - 782 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Niemann, Jörg A1 - Fussenecker, Claudia A1 - Schlösser, Martin ED - Walker, Alastair ED - O'Connor, Rory V. ED - Messnarz, Richard T1 - Eye Tracking for Quality Control in Automotive Manufacturing T2 - Systems, Software and Services Process Improvement Y1 - 2019 SN - 978-3-030-28004-8 U6 - https://doi.org/10.1007/978-3-030-28005-5_22 SP - 289 EP - 298 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Zander, Nils A1 - Kollmannsberger, Stefan A1 - Ruess, Martin A1 - Yosibash, Z. A1 - Rank, Ernst T1 - The Finite Cell Method for linear thermoelasticity JF - Computers & Mathematics with Applications Y1 - 2012 U6 - https://doi.org/10.1016/j.camwa.2012.09.002 SN - 0898-1221 N1 - Open Archiv VL - 64 IS - 11 SP - 3527 EP - 3541 PB - Elsevier ER - TY - JOUR A1 - Ruess, Martin A1 - Pahl, P. J. T1 - An extended QR-solver for large profiled matrices JF - International Journal for Numerical Methods in Engineering Y1 - 2009 U6 - https://doi.org/10.1002/nme.2618 SN - 1097-0207 VL - 79 IS - 11 SP - 1419 EP - 1442 PB - Wiley ER - TY - BOOK A1 - Niemann, Jörg A1 - Pisla, Adrian T1 - Life-Cycle Management of Machines and Mechanisms T3 - Mechanisms and Machine Science Y1 - 2021 SN - 978-3-030-56447-6 U6 - https://doi.org/10.1007/978-3-030-56449-0 VL - 90 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Zander, Nils A1 - Bog, Tino A1 - Elhaddad, Mohamed A1 - Espinoza, R. A1 - Hu, H. A1 - Joly, A. A1 - Wu, C. A1 - Zerbe, P. A1 - Düster, Alexander A1 - Kollmannsberger, Stefan A1 - Parvizian, J. A1 - Ruess, Martin A1 - Schillinger, Dominik A1 - Rank, Ernst T1 - FCMLab: A finite cell research toolbox for MATLAB JF - Advances in Engineering Software Y1 - 2014 U6 - https://doi.org/10.1016/j.advengsoft.2014.04.004 SN - 0965-9978 VL - 74 SP - 49 EP - 63 PB - Elsevier ER - TY - CHAP A1 - Ruess, Martin A1 - Varduhn, Vasco A1 - Rank, Ernst A1 - Yosibash, Zohar ED - Bader, Michael T1 - A Parallel High-Order Fictitious Domain Approach for Biomechanical Applications T2 - 11th International Symposium on Parallel and Distributed Computing (ISPDC), 2012 : 25 - 29 June 2012, Munich, Germany ; proceedings Y1 - 2012 UR - http://ieeexplore.ieee.org/document/6341523/ SN - 978-1-4673-2599-8 U6 - https://doi.org/10.1109/ISPDC.2012.45 SP - 279 EP - 285 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Ruess, Martin A1 - Mundani, Ralf-Peter A1 - Rank, Ernst T1 - Computational steering in dynamic structure simulation: An improved communication concept T2 - 2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH), Toronto, 26.09.2009 - 27.09.2009 Y1 - 2009 UR - http://ieeexplore.ieee.org/document/5444450/ SN - 978-1-4244-3877-8 U6 - https://doi.org/10.1109/TIC-STH.2009.5444450 SP - 497 EP - 502 PB - IEEE ER - TY - JOUR A1 - Ruess, Martin A1 - Schillinger, Dominik A1 - Bazilevs, Yuri A1 - Varduhn, Vasco A1 - Rank, Ernst T1 - Weakly enforced essential boundary conditions for NURBS-embedded and trimmed NURBS geometries on the basis of the finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2013 U6 - https://doi.org/10.1002/nme.4522 SN - 1097-0207 VL - 95 IS - 10 SP - 811 EP - 846 PB - Wiley ER - TY - JOUR A1 - Schillinger, Dominik A1 - Ruess, Martin A1 - Zander, Nils A1 - Bazilevs, Yuri A1 - Düster, Alexander A1 - Rank, Ernst T1 - Small and large deformation analysis with the p- and B-spline versions of the Finite Cell Method JF - Computational Mechanics Y1 - 2012 U6 - https://doi.org/10.1007/S00466-012-0684-Z SN - 1432-0924 VL - 50 IS - 4 SP - 445 EP - 478 PB - Springer ER - TY - JOUR A1 - Ruess, Martin A1 - Tal, David A1 - Trabelsi, Nir A1 - Yosibash, Zohar A1 - Rank, Ernst T1 - The finite cell method for bone simulations: verification and validation JF - Biomechanics and modeling in mechanobiology Y1 - 2012 UR - http://www.ncbi.nlm.nih.gov/pubmed/21695444 U6 - https://doi.org/10.1007/s10237-011-0322-2 SN - 1617-7940 VL - 11 IS - 3-4 SP - 425 EP - 437 PB - Springer ER - TY - JOUR A1 - Ruess, Martin A1 - Schillinger, Dominik A1 - Özcan, Ali I. A1 - Rank, Ernst T1 - Weak coupling for isogeometric analysis of non-matching and trimmed multi-patch geometries JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2014 U6 - https://doi.org/10.1016/j.cma.2013.10.009 SN - 0045-7825 VL - 269 SP - 46 EP - 71 PB - Elsevier ER - TY - JOUR A1 - Rank, Ernst A1 - Ruess, Martin A1 - Kollmannsberger, Stefan A1 - Schillinger, Dominik A1 - Düster, Alexander T1 - Geometric modeling, isogeometric analysis and the finite cell method JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2012 U6 - https://doi.org/10.1016/j.cma.2012.05.022 SN - 0045-7825 VL - 249-252 SP - 104 EP - 115 PB - Elsevier ER - TY - JOUR A1 - Yang, Z. A1 - Ruess, Martin A1 - Kollmannsberger, Stefan A1 - Düster, Alexander A1 - Rank, Ernst T1 - An efficient integration technique for the voxel-based finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2012 U6 - https://doi.org/10.1002/nme.4269 SN - 1097-0207 VL - 91 IS - 5 SP - 457 EP - 471 PB - Wiley ER - TY - JOUR A1 - Kollmannsberger, Stefan A1 - Özcan, Ali I. A1 - Baiges, J. A1 - Ruess, Martin A1 - Rank, Ernst A1 - Reali, A. T1 - Parameter-free, weak imposition of Dirichlet boundary conditions and coupling of trimmed and non-conforming patches JF - International Journal for Numerical Methods in Engineering Y1 - 2015 U6 - https://doi.org/10.1002/nme.4817 SN - 1097-0207 VL - 101 IS - 9 SP - 670 EP - 699 PB - Wiley ER - TY - CHAP A1 - Guo, Yujie A1 - Ruess, Martin T1 - Isogeometric Weak Coupling of Shell Structures T2 - 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015, Kissimmee, Florida, USA, 5 - 9 January 2015 Y1 - 2015 UR - https://arc.aiaa.org/doi/book/10.2514/MSDM15 SN - 978-1-62410-342-1 U6 - https://doi.org/10.2514/6.2015-0965 SP - 1 EP - 14 PB - Curran CY - Red Hook ER - TY - JOUR A1 - Schillinger, Dominik A1 - Ruess, Martin T1 - The Finite Cell Method: A Review in the Context of Higher-Order Structural Analysis of CAD and Image-Based Geometric Models JF - Archives of Computational Methods in Engineering Y1 - 2015 U6 - https://doi.org/10.1007/s11831-014-9115-y SN - 1886-1784 VL - 22 IS - 3 SP - 391 EP - 455 PB - Springer ER - TY - JOUR A1 - Liang, Ke A1 - Ruess, Martin A1 - Abdalla, Mostafa T1 - The Koiter–Newton approach using von Kármán kinematics for buckling analyses of imperfection sensitive structures JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2014 U6 - https://doi.org/10.1016/j.cma.2014.07.008 SN - 0045-7825 VL - 279 SP - 440 EP - 468 PB - Elsevier ER - TY - JOUR A1 - Liang, Ke A1 - Zhang, YongJie A1 - Sun, Qin A1 - Ruess, Martin T1 - A new robust design for imperfection sensitive stiffened cylinders used in aerospace engineering JF - Science China Technological Sciences KW - peer Y1 - 2015 U6 - https://doi.org/10.1007/s11431-015-5793-4 SN - 1869-1900 VL - 58 IS - 5 SP - 796 EP - 802 PB - Springer ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin A1 - Gürdal, Zafer T1 - A contact extended isogeometric layerwise approach for the buckling analysis of delaminated composites JF - Composite Structures Y1 - 2014 U6 - https://doi.org/10.1016/j.compstruct.2014.05.006 SN - 0263-8223 VL - 116 SP - 55 EP - 66 PB - Elsevier ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin T1 - Nitsche’s method for a coupling of isogeometric thin shells and blended shell structures JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2015 U6 - https://doi.org/10.1016/j.cma.2014.11.014 SN - 0045-7825 VL - 284 SP - 881 EP - 905 PB - Elsevier ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin T1 - A layerwise isogeometric approach for NURBS-derived laminate composite shells JF - Composite Structures Y1 - 2015 U6 - https://doi.org/10.1016/j.compstruct.2015.01.012 SN - 0263-8223 VL - 124 SP - 300 EP - 309 PB - Elsevier ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin T1 - Weak Dirichlet boundary conditions for trimmed thin isogeometric shells JF - Computers & Mathematics with Applications Y1 - 2015 U6 - https://doi.org/10.1016/j.camwa.2015.06.012 SN - 0898-1221 N1 - Open Archiv VL - 70 IS - 7 SP - 1425 EP - 1440 PB - Elsevier ER - TY - JOUR A1 - Wille, Hagen A1 - Ruess, Martin A1 - Rank, Ernst A1 - Yosibash, Zohar T1 - Uncertainty quantification for personalized analyses of human proximal femurs JF - Journal of Biomechanics N2 - Computational models for the personalized analysis of human femurs contain uncertainties in bone material properties and loads, which affect the simulation results. To quantify the influence we developed a probabilistic framework based on polynomial chaos (PC) that propagates stochastic input variables through any computational model. We considered a stochastic E-ρ relationship and a stochastic hip contact force, representing realistic variability of experimental data. Their influence on the prediction of principal strains (ϵ1 and ϵ3) was quantified for one human proximal femur, including sensitivity and reliability analysis. Large variabilities in the principal strain predictions were found in the cortical shell of the femoral neck, with coefficients of variation of ≈40%. Between 60 and 80% of the variance in ϵ1 and ϵ3 are attributable to the uncertainty in the E-ρ relationship, while ≈10% are caused by the load magnitude and 5-30% by the load direction. Principal strain directions were unaffected by material and loading uncertainties. The antero-superior and medial inferior sides of the neck exhibited the largest probabilities for tensile and compression failure, however all were very small (pf<0.001). In summary, uncertainty quantification with PC has been demonstrated to efficiently and accurately describe the influence of very different stochastic inputs, which increases the credibility and explanatory power of personalized analyses of human proximal femurs. Y1 - 2016 UR - http://www.ncbi.nlm.nih.gov/pubmed/26873282 U6 - https://doi.org/10.1016/j.jbiomech.2015.11.013 SN - 0021-9290 VL - 49 IS - 4 SP - 520 EP - 527 PB - Elsevier ER - TY - CHAP A1 - Friedrich, Linus A1 - Lyssakow, Pawel A1 - Pearce, Garth A1 - Ruess, Martin A1 - Bisagni, Chiara A1 - Schröder, Kai-Uwe ED - Papadrakakis, Manolis ED - Papadopoulos, V. ED - Stefanou, G. ED - Plevris, V. T1 - ON THE STRUCTURAL DESIGN OF IMPERFECTION SENSITIVE LAMINATED COMPOSITE SHELL STRUCTURES SUBJECTED TO AXIAL COMPRESSION T2 - Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 05.06.2016 - 10.06.2016, Crete Island KW - composite shells KW - imperfection sensitivity KW - Shell buckling Y1 - 2016 UR - http://www.eccomasproceedia.org/conferences/eccomas-congresses/eccomas-congress-2016 SN - 978-618-82844-0-1 U6 - https://doi.org/10.7712/100016.1951.5838 SP - 2182 EP - 2189 PB - Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece CY - Athens ER - TY - CHAP A1 - Friedrich, Linus A1 - Ruess, Martin A1 - Schröder, Kai-Uwe T1 - Efficient and robust shell design of space launcher vehicle structures T2 - 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, San Diego, 4-8 January 2016 Y1 - 2016 UR - https://arc.aiaa.org/doi/book/10.2514/MSDM16 SN - 978-1-62410-392-6 U6 - https://doi.org/10.2514/6.2016-1973 SP - 1 EP - 18 PB - American Institute of Aeronautics and Astronautics CY - Reston ER - TY - JOUR A1 - Liang, Ke A1 - Ruess, Martin A1 - Abdalla, Mostafa T1 - An eigenanalysis-based bifurcation indicator proposed in the framework of a reduced-order modeling technique for non-linear structural analysis JF - International Journal of Non-Linear Mechanics Y1 - 2016 U6 - https://doi.org/10.1016/j.ijnonlinmec.2016.01.013 SN - 0020-7462 VL - 81 SP - 129 EP - 138 PB - Elsevier ER - TY - JOUR A1 - Friedrich, Linus A1 - Loosen, Simon A1 - Liang, Ke A1 - Ruess, Martin A1 - Bisagni, Chiara A1 - Schröder, Kai-Uwe T1 - Stacking sequence influence on imperfection sensitivity of cylindrical composite shells under axial compression JF - Composite Structures Y1 - 2015 U6 - https://doi.org/10.1016/j.compstruct.2015.08.132 SN - 0263-8223 VL - 134 SP - 750 EP - 761 PB - Elsevier ER - TY - JOUR A1 - Varduhn, Vasco A1 - Hsu, Ming-Chen A1 - Ruess, Martin A1 - Schillinger, Dominik T1 - The tetrahedral finite cell method: Higher-order immersogeometric analysis on adaptive non-boundary-fitted meshes JF - International Journal for Numerical Methods in Engineering Y1 - 2016 U6 - https://doi.org/10.1002/nme.5207 SN - 1097-0207 VL - 107 IS - 12 SP - 1054 EP - 1079 PB - Wiley ER - TY - JOUR A1 - Liang, Ke A1 - Ruess, Martin A1 - Abdalla, Mostafa T1 - Co-rotational finite element formulation used in the Koiter–Newton method for nonlinear buckling analyses JF - Finite Elements in Analysis and Design Y1 - 2016 U6 - https://doi.org/10.1016/j.finel.2016.03.006 SN - 0168-874X VL - 116 SP - 38 EP - 54 PB - Elsevier ER - TY - JOUR A1 - Zander, Nils A1 - Ruess, Martin A1 - Bog, Tino A1 - Kollmannsberger, Stefan A1 - Rank, Ernst T1 - Multi-level hp -adaptivity for cohesive fracture modeling JF - International Journal for Numerical Methods in Engineering Y1 - 2017 U6 - https://doi.org/10.1002/nme.5340 SN - 1097-0207 VL - 109 IS - 13 SP - 1723 EP - 1755 PB - Wiley ER - TY - JOUR A1 - Liang, Ke A1 - Ruess, Martin T1 - Nonlinear buckling analysis of the conical and cylindrical shells using the SGL strain based reduced order model and the PHC method JF - Aerospace Science and Technology Y1 - 2016 U6 - https://doi.org/10.1016/j.ast.2016.05.018 SN - 1270-9638 VL - 55 SP - 103 EP - 110 PB - Elsevier ER - TY - JOUR A1 - Nguyen, Lam H. A1 - Stoter, Stein K.F. A1 - Baum, Thomas A1 - Kirschke, Jan A1 - Ruess, Martin A1 - Yosibash, Zohar A1 - Schillinger, Dominik T1 - Phase-field boundary conditions for the voxel finite cell method: Surface-free stress analysis of CT-based bone structures JF - International Journal for Numerical Methods in Biomedical Engineering Y1 - 2017 UR - http://www.ncbi.nlm.nih.gov/pubmed/28294574 U6 - https://doi.org/10.1002/cnm.2880 SN - 2040-7947 VL - 33 IS - 12 PB - Wiley ER - TY - JOUR A1 - Guo, Yujie A1 - Heller, Jason A1 - Hughes, Thomas J.R. A1 - Ruess, Martin A1 - Schillinger, Dominik T1 - Variationally consistent isogeometric analysis of trimmed thin shells at finite deformations, based on the STEP exchange format JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2018 U6 - https://doi.org/10.1016/j.cma.2018.02.027 SN - 0045-7825 N1 - Open Manuscript https://www.sciencedirect.com/science/article/am/pii/S0045782518301075 VL - 336 SP - 39 EP - 79 PB - Elsevier ER - TY - JOUR A1 - Nguyen, Lam H. A1 - Stoter, Stein K.F. A1 - Ruess, Martin A1 - Sanchez Uribe, Manuel A. A1 - Schillinger, Dominik T1 - The diffuse Nitsche method: Dirichlet constraints on phase-field boundaries JF - International Journal for Numerical Methods in Engineering Y1 - 2018 U6 - https://doi.org/10.1002/nme.5628 SN - 1097-0207 VL - 113 IS - 4 SP - 601 EP - 633 PB - Wiley ER - TY - JOUR A1 - Keshavanarayana, Pradeep A1 - Ruess, Martin A1 - de Borst, René T1 - On the monolithic and staggered solution of cell contractility and focal adhesion growth JF - International Journal for Numerical Methods in Biomedical Engineering Y1 - 2018 UR - http://www.ncbi.nlm.nih.gov/pubmed/30070031 U6 - https://doi.org/10.1002/cnm.3138 SN - 2040-7947 VL - 34 IS - 11 PB - Wiley ER - TY - JOUR A1 - Magisano, D. A1 - Liang, Ke A1 - Garcea, G. A1 - Leonetti, L. A1 - Ruess, Martin T1 - An efficient mixed variational reduced-order model formulation for nonlinear analyses of elastic shells JF - International Journal for Numerical Methods in Engineering Y1 - 2018 U6 - https://doi.org/10.1002/nme.5629 SN - 1097-0207 VL - 113 IS - 4 SP - 634 EP - 655 PB - Wiley ER - TY - JOUR A1 - Groen, Jeroen P. A1 - Langelaar, Matthijs A1 - Sigmund, Ole A1 - Ruess, Martin T1 - Higher-order multi-resolution topology optimization using the finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2017 U6 - https://doi.org/10.1002/nme.5432 SN - 1097-0207 VL - 110 IS - 10 SP - 903 EP - 920 PB - Wiley ER - TY - JOUR A1 - Guo, Yujie A1 - Zou, Zhihui A1 - Ruess, Martin T1 - Isogeometric multi-patch analyses for mixed thin shells in the framework of non-linear elasticity JF - Computer Methods in Applied Mechanics and Engineering Y1 - 2021 U6 - https://doi.org/10.1016/j.cma.2021.113771 SN - 0045-7825 VL - 380 SP - 49 EP - 52 PB - Elsevier ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin A1 - Schillinger, Dominik T1 - A parameter-free variational coupling approach for trimmed isogeometric thin shells JF - Computational Mechanics Y1 - 2017 U6 - https://doi.org/10.1007/s00466-016-1368-x SN - 1432-0924 VL - 59 IS - 4 SP - 693 EP - 715 PB - Springer ER - TY - JOUR A1 - Elhaddad, Mohamed A1 - Zander, Nils A1 - Bog, Tino A1 - Kudela, László A1 - Kollmannsberger, Stefan A1 - Kirschke, Jan A1 - Baum, Thomas A1 - Ruess, Martin A1 - Rank, Ernst T1 - Multi-level hp-finite cell method for embedded interface problems with application in biomechanics JF - International Journal for Numerical Methods in Biomedical Engineering N2 - This work presents a numerical discretization technique for solving 3-dimensional material interface problems involving complex geometry without conforming mesh generation. The finite cell method (FCM), which is a high-order fictitious domain approach, is used for the numerical approximation of the solution without a boundary-conforming mesh. Weak discontinuities at material interfaces are resolved by using separate FCM meshes for each material sub-domain and weakly enforcing the interface conditions between the different meshes. Additionally, a recently developed hierarchical hp-refinement scheme is used to locally refine the FCM meshes to resolve singularities and local solution features at the interfaces. Thereby, higher convergence rates are achievable for nonsmooth problems. A series of numerical experiments with 2- and 3-dimensional benchmark problems is presented, showing that the proposed hp-refinement scheme in conjunction with the weak enforcement of the interface conditions leads to a significant improvement of the convergence rates, even in the presence of singularities. Finally, the proposed technique is applied to simulate a vertebra-implant model. The application showcases the method's potential as an accurate simulation tool for biomechanical problems involving complex geometry, and it demonstrates its flexibility in dealing with different types of geometric description. Y1 - 2018 UR - http://www.ncbi.nlm.nih.gov/pubmed/29265715 U6 - https://doi.org/10.1002/cnm.2951 SN - 2040-7947 VL - 34 IS - 4 PB - Wiley ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Escudier, Marcel A1 - Nahavandi, Ali A1 - Nickson, A. K. A1 - Syed, Khawar J. A1 - Joos, Franz T1 - Experimental and numerical investigation of isothermal flow in an idealized swirl combustor JF - International Journal of Numerical Methods for Heat & Fluid Flow Y1 - 2010 U6 - https://doi.org/10.1108/09615531011024084 VL - 20 IS - 3 SP - 348 EP - 370 PB - Emerald ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Epple, B. A1 - Krohmer, B. T1 - Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation JF - Progress in Computational Fluid Dynamics, An International Journal Y1 - 2005 U6 - https://doi.org/10.1504/pcfd.2005.007067 VL - 5 IS - 6 PB - inderscience ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Nahavandi, A. A1 - Syed, K. J. T1 - URANS and LES analysis of turbulent swirling flows JF - Progress in Computational Fluid Dynamics, An International Journal Y1 - 2005 U6 - https://doi.org/10.1504/pcfd.2005.007680 VL - 5 IS - 8 PB - inderscience ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Ozkan, K. A1 - Cagan, M. A1 - Gunes, D. T1 - Computational investigation of turbulent jet impinging onto rotating disk JF - International Journal of Numerical Methods for Heat & Fluid Flow Y1 - 2007 U6 - https://doi.org/10.1108/09615530710730157 VL - 17 IS - 3 SP - 284 EP - 301 PB - Emerald ER - TY - JOUR A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Feature extraction with deep neural networks by a generalized discriminant analysis JF - IEEE transactions on neural networks and learning systems N2 - We present an approach to feature extraction that is a generalization of the classical linear discriminant analysis (LDA) on the basis of deep neural networks (DNNs). As for LDA, discriminative features generated from independent Gaussian class conditionals are assumed. This modeling has the advantages that the intrinsic dimensionality of the feature space is bounded by the number of classes and that the optimal discriminant function is linear. Unfortunately, linear transformations are insufficient to extract optimal discriminative features from arbitrarily distributed raw measurements. The generalized discriminant analysis (GerDA) proposed in this paper uses nonlinear transformations that are learnt by DNNs in a semisupervised fashion. We show that the feature extraction based on our approach displays excellent performance on real-world recognition and detection tasks, such as handwritten digit recognition and face detection. In a series of experiments, we evaluate GerDA features with respect to dimensionality reduction, visualization, classification, and detection. Moreover, we show that GerDA DNNs can preprocess truly high-dimensional input data to low-dimensional representations that facilitate accurate predictions even if simple linear predictors or measures of similarity are used. Y1 - 2012 U6 - https://doi.org/10.1109/tnnls.2012.2183645 VL - 23 IS - 4 SP - 596 EP - 608 PB - IEEE ER - TY - JOUR A1 - Maqableh, A. M. A1 - Khadrawi, A. F. A1 - Nimr, M. AlA. A1 - Ammourah, S. A. A1 - Benim, Ali Cemal T1 - Heat transfer characteristics of parallel and counter flow micro-channel heat exchangers with varying wall resistance JF - Progress in Computational Fluid Dynamics, An International Journal Y1 - 2011 U6 - https://doi.org/10.1504/pcfd.2011.042183 VL - 11 IS - 5 PB - inderscience ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Escudier, M. P. A1 - Nahavandi, A. A1 - Nickson, A. K. A1 - Syed, K. J. A1 - Joos, F. T1 - Computational analysis of incompressible turbulent flow in an idealised swirl combustor JF - Progess in Computational Fluid Dynamics, An International Journal Y1 - 2011 U6 - https://doi.org/10.1504/pcfd.2011.037571 VL - 11 IS - 1 SP - 42 EP - 45 PB - inderscience ER - TY - JOUR A1 - Winkler, Michael A1 - Becker, Klaus A1 - Doolan, Con A1 - Kameier, Frank A1 - Paschereit, Christian Oliver T1 - Aeroacoustic Effects of a Cylinder-Plate Configuration JF - AIAA Journal Y1 - 2012 U6 - https://doi.org/10.2514/1.j051578 VL - 50 IS - 7 SP - 1614 EP - 1620 PB - ARC ER - TY - JOUR A1 - Chattopadhyay, Himadri A1 - Benim, Ali Cemal T1 - Turbulent Heat Transfer Over a Moving Surface Due to Impinging Slot Jets JF - Journal of Heat Transfer Y1 - 2011 U6 - https://doi.org/10.1115/1.4004075 VL - 133 IS - 10 PB - ASME ER - TY - JOUR A1 - Elíasson, Jónas A1 - Palsson, Asgeir A1 - Weber, Konradin T1 - Monitoring ash clouds for aviation JF - Nature Y1 - 2011 U6 - https://doi.org/10.1038/475455b VL - 475 IS - 7357 PB - Springer Nature ER - TY - JOUR A1 - Gaida, Daniel A1 - Wolf, Christian A1 - Meyer, C. A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Bäck, T. A1 - Bongards, M. A1 - McLoone, S. T1 - State estimation for anaerobic digesters using the ADM1 JF - Water science and technology N2 - The optimization of full-scale biogas plant operation is of great importance to make biomass a competitive source of renewable energy. The implementation of innovative control and optimization algorithms, such as Nonlinear Model Predictive Control, requires an online estimation of operating states of biogas plants. This state estimation allows for optimal control and operating decisions according to the actual state of a plant. In this paper such a state estimator is developed using a calibrated simulation model of a full-scale biogas plant, which is based on the Anaerobic Digestion Model No.1. The use of advanced pattern recognition methods shows that model states can be predicted from basic online measurements such as biogas production, CH4 and CO2 content in the biogas, pH value and substrate feed volume of known substrates. The machine learning methods used are trained and evaluated using synthetic data created with the biogas plant model simulating over a wide range of possible plant operating regions. Results show that the operating state vector of the modelled anaerobic digestion process can be predicted with an overall accuracy of about 90%. This facilitates the application of state-based optimization and control algorithms on full-scale biogas plants and therefore fosters the production of eco-friendly energy from biomass. Y1 - 2012 U6 - https://doi.org/10.2166/wst.2012.286 VL - 66 IS - 5 SP - 1088 EP - 1095 PB - IWA Publishing ER - TY - JOUR A1 - Aslan, Erman A1 - Nahavandi, A. A1 - Taymaz, I. A1 - Benim, Ali Cemal T1 - A note on modelling non-rectangular boundaries by the Lattice Boltzmann Method JF - Progress in Computational Fluid Dynamics, An International Journal Y1 - 2012 U6 - https://doi.org/10.1504/pcfd.2012.049815 VL - 12 IS - 6 SP - 433 EP - 438 PB - inderscience ER - TY - JOUR A1 - Maqableh, A. M. A1 - Ammourah, S. A. A1 - Khadrawi, A. F. A1 - Al-Nimr, M. A. A1 - Benim, Ali Cemal T1 - Hydrodynamics behaviour of a fluid flow in micro-venturi JF - Candian Journal of Physics Y1 - 2012 U6 - https://doi.org/10.1139/p11-145 VL - 90 IS - 1 SP - 83 EP - 89 PB - Canadian Science Publishing ER - TY - JOUR A1 - Anders, Denis A1 - Weinberg, Kerstin A1 - Reichardt, Roland T1 - Isogeometric analysis of thermal diffusion in binary blends JF - Computational Materials Science Y1 - 2012 U6 - https://doi.org/10.1016/j.commatsci.2011.01.008 VL - 52 IS - 1 SP - 182 EP - 188 PB - Elsevier ER - TY - JOUR A1 - Taymaz, Imdat A1 - Aslan, Erman A1 - Benim, Ali Cemal T1 - Numerical investigation of incompressible fluid flow and heat transfer across a bluff body in a channel flow JF - Thermal Science Y1 - 2015 U6 - https://doi.org/10.2298/tsci120220145t VL - 19 IS - 2 SP - 537 EP - 547 PB - doiSerbia ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Iqbal, Sohail A1 - Joos, Franz A1 - Wiedermann, Alexander T1 - Numerical Analysis of Turbulent Combustion in a Model Swirl Gas Turbine Combustor JF - Journal of Combustion Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28044 SN - 2090-1968 SN - 2090-1976 VL - 2016 SP - 1 EP - 12 PB - Hindawi ER - TY - JOUR A1 - Fomin, A. A1 - Dvornikov, L. A1 - Paramonov, M. A1 - Jahr, Andreas T1 - To the theory of mechanisms subfamilies JF - IOP Conference Series: Materials Science and Engineering Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28062 VL - 124 PB - IOP Publishing ER - TY - JOUR A1 - Henin, S. A1 - Stelmaszczyk, K. A1 - Petrarca, M. A1 - Rohwetter, P. A1 - Hao, Z. Q. A1 - Lüder, J. A1 - Petit, Y. A1 - Vogel, A. A1 - Weber, Konradin A1 - Kasparian, J. A1 - Wöste, L. A1 - Wolf, J.-P. T1 - Laser Filament Induced Water Condensation JF - EPJ Web of Conferences N2 - C Owned by the authors, published by EDP Sciences, 2013 Y1 - 2013 U6 - https://doi.org/10.1051/epjconf/20134112008 VL - 41 PB - edp sciences ER - TY - JOUR A1 - Joly, P. A1 - Petrarca, M. A1 - Vogel, A. A1 - Pohl, T. A1 - Nagy, T. A1 - Jusforgues, Q. A1 - Simon, P. A1 - Kasparian, J. A1 - Weber, K. A1 - Wolf, J.-P. T1 - Laser-induced condensation by ultrashort laser pulses at 248 nm JF - Applied Physics Letters Y1 - 2013 U6 - https://doi.org/10.1063/1.4794416 VL - 102 IS - 9 PB - AIP ER - TY - JOUR A1 - Iqbal, Sohail A1 - Benim, Ali Cemal A1 - Fischer, S. A1 - Joos, F. A1 - Kluβ, D. A1 - Wiedermann, Alexander T1 - Experimental and numerical analysis of natural bio and syngas swirl flames in a model gas turbine combustor JF - Journal of Thermal Science Y1 - 2016 U6 - https://doi.org/10.1007/s11630-016-0885-4 VL - 25 IS - 5 SP - 460 EP - 469 PB - Springer ER - TY - JOUR A1 - Birmili, Wolfram A1 - Rehn, Johanna A1 - Vogel, Andreas A1 - Boehlke, Christoph A1 - Weber, Konradin A1 - Rasch, Fabian T1 - Micro-scale variability of urban particle number and mass concentrations in Leipzig, Germany JF - Meteorologische Zeitschrift Y1 - 2013 U6 - https://doi.org/10.1127/0941-2948/2013/0394 VL - 22 IS - 2 SP - 155 EP - 165 PB - Bornträger ER - TY - JOUR A1 - Aslan, Erman A1 - Taymaz, Imdat A1 - Benim, Ali Cemal T1 - Investigation of LBM curved boundary treatments for unsteady flows JF - European Journal of Mechanics - B/Fluids Y1 - 2015 U6 - https://doi.org/10.1016/j.euromechflu.2015.01.004 VL - 51 SP - 68 EP - 74 PB - Elsevier ER - TY - JOUR A1 - Niemann, Jörg A1 - Pisla, Adrian T1 - Sustainable Potentials and Risks Assess in Automation and Robotization Using the Life Cycle Management Index Tool—LY-MIT JF - Sustainability KW - FLiX KW - DOAJ Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27966 SN - 2071-1050 VL - 10 IS - 12 PB - MDPI ER - TY - JOUR A1 - Iqbal, Sohail A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Numerical analysis of lifted hydrogen flame JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27950 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal T1 - Numerical study of the quenching of a laminar premixed hydrogen flame JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27976 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Numerical analysis of liquid jet impingement cooling of a thermoelectric generator JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27988 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Saeedrashed, Younis Saida A1 - Benim, Ali Cemal T1 - A computational investigation of the hydrodynamics of the Badush dam in northern Iraq JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27997 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Prata, A. J. A1 - Dezitter, F. A1 - Davies, I. A1 - Weber, Konradin A1 - Birnfeld, M. A1 - Moriano, D. A1 - Bernardo, C. A1 - Vogel, A. A1 - Prata, G. S. A1 - Mather, T. A. A1 - Thomas, H. E. A1 - Cammas, J. A1 - Weber, M. T1 - Artificial cloud test confirms volcanic ash detection using infrared spectral imaging JF - Scientific reports N2 - Airborne volcanic ash particles are a known hazard to aviation. Currently, there are no means available to detect ash in flight as the particles are too fine (radii < 30 μm) for on-board radar detection and, even in good visibility, ash clouds are difficult or impossible to detect by eye. The economic cost and societal impact of the April/May 2010 Icelandic eruption of Eyjafjallajökull generated renewed interest in finding ways to identify airborne volcanic ash in order to keep airspace open and avoid aircraft groundings. We have designed and built a bi-spectral, fast-sampling, uncooled infrared camera device (AVOID) to examine its ability to detect volcanic ash from commercial jet aircraft at distances of more than 50 km ahead. Here we report results of an experiment conducted over the Atlantic Ocean, off the coast of France, confirming the ability of the device to detect and quantify volcanic ash in an artificial ash cloud created by dispersal of volcanic ash from a second aircraft. A third aircraft was used to measure the ash in situ using optical particle counters. The cloud was composed of very fine ash (mean radii ~10 μm) collected from Iceland immediately after the Eyjafjallajökull eruption and had a vertical thickness of ~200 m, a width of ~2 km and length of between 2 and 12 km. Concentrations of ~200 μg m(-3) were identified by AVOID at distances from ~20 km to ~70 km. For the first time, airborne remote detection of volcanic ash has been successfully demonstrated from a long-range flight test aircraft. Y1 - 2016 U6 - https://doi.org/10.1038/srep25620 VL - 6 PB - Springer Nature ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Gül, Fethi A1 - Assmann, Alexander A1 - Akhyari, Payam A1 - Lichtenberg, Artur A1 - Joos, Franz T1 - Validation of loss-coefficient-based outlet boundary conditions for simulating aortic flow JF - Journal of Mechanics in Medicine and Biology Y1 - 2016 U6 - https://doi.org/10.1142/s0219519416500111 VL - 16 IS - 2 PB - World Scientific ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - A Finite Volume Analysis of Thermoelectric Generators JF - Heat Transfer Engineering Y1 - 2019 U6 - https://doi.org/10.1080/01457632.2018.1474588 SN - 0145-7632 SN - 1521-0537 VL - 40 IS - 17-18 SP - 1442 EP - 1450 PB - Taylor & Francis ER - TY - JOUR A1 - Saeedrashed, Younis Saida A1 - Benim, Ali Cemal T1 - Validation Methods of Geometric 3D-CityGML Data for Urban Wind Simulations JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27906 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Cicek, Aydin A1 - Eker, Arif Mert T1 - A numerical analysis of the thermohydraulics of an EGS project in Turkey JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27910 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Diederich, Michael A1 - Gül, Fethi A1 - Benim, Ali Cemal A1 - Hamberger, Andreas A1 - Heese, Markus T1 - Analysis of combustion, heat and fluid flow in a biomass furnace JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27880 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Özman, Cansu A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Variable temperature effects on TEG performance JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27893 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Diederich, Michael A1 - Gül, Fethi T1 - Prediction and measurement of the aerodynamic performance of a wind turbine JF - MATEC Web of Conferences Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27925 SN - 2261-236X VL - 240 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Diederich, Michael A1 - Gül, Fethi A1 - Oclon, Pawel A1 - Taler, Jan T1 - Computational and experimental investigation of the aerodynamics and aeroacoustics of a small wind turbine with quasi-3D optimization JF - Energy Conversion and Management Y1 - 2018 U6 - https://doi.org/10.1016/j.enconman.2018.09.042 VL - 177 SP - 143 EP - 149 PB - Elsevier ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Chattopadhyay, Himadri A1 - Banerjee, Arnab A1 - Benim, Ali Cemal T1 - Heat transfer and flow field in a circular twisted channel JF - MATEC Web of Conferences Y1 - 2018 U6 - https://doi.org/10.1051/matecconf/201824001005 VL - 240 PB - edp sciences ER - TY - JOUR A1 - Guo, Y. A1 - Do, H. A1 - Ruess, Martin T1 - Isogeometric stability analysis of thin shells: From simple geometries to engineering models JF - International Journal for Numerical Methods in Engineering Y1 - 2019 U6 - https://doi.org/10.1002/nme.6020 SN - 1097-0207 VL - 118 IS - 8 SP - 433 EP - 458 PB - Wiley ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Pfeiffelmann, Björn T1 - Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework JF - Energies KW - DOAJ Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27727 SN - 1996-1073 VL - 13 IS - 1 PB - MDPI ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Pfeiffelmann, Björn T1 - Validation of Combustion Models for Lifted Hydrogen Flame JF - E3S Web of Conferences Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27815 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Diederich, Michael A1 - Nahavandi, Ali T1 - Prediction of flow and dispersion in cross–ventilated buildings JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27785 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Diederich, Michael T1 - Prediction of Roughness Effects on Wind Turbine Aerodynamics JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27775 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Pfeiffelmann, Björn T1 - Prediction of hydrogen flame propagation in a channel with exit contraction JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27806 SN - 2267-1242 VL - 128 IS - 01013 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Pfeiffelmann, Björn T1 - Prediction of burning velocity and quenching distance of hydrogen flames JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27790 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Gobinda Das, Sampad A1 - Chattopadhyay, Himadri A1 - Benim, Ali Cemal A1 - Moghimi, M. A. T1 - Transport Phenomenon of Simultaneously Developing Flow and Heat Transfer in Twisted Sinusoidal Wavy Microchannel under Pulsating Inlet Flow Condition JF - E3S Web of Conferences Y1 - 2019 U6 - https://doi.org/10.1051/e3sconf/201912801011 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Pfeiffelmann, Björn A1 - Ocłoń, Paweł A1 - Taler, Jan T1 - Computational investigation of a lifted hydrogen flame with LES and FGM JF - Energy Y1 - 2019 U6 - https://doi.org/10.1016/j.energy.2019.02.133 SN - 0360-5442 VL - 173 SP - 1172 EP - 1181 PB - Elsevier ER - TY - JOUR A1 - Fomin, Alexey A1 - Petelin, Daniil A1 - Jahr, Andreas T1 - Synthesis and Analysis of a Novel Linkage Mechanism with the Helical Motion of the End-Effector JF - Robotics Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27736 SN - 2218-6581 N1 - Supplementary Material ist verfügbar: https://www.mdpi.com/2218-6581/9/3/53/s1 (Zip mit mov-Datei) VL - 9 IS - 3 SP - 1 EP - 15 PB - MDPI ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Diederich, Michael A1 - Gül, Fethi A1 - Benim, Ali Cemal A1 - Heese, Markus A1 - Hamberger, Andreas T1 - Computational and Experimental Investigation of an Industrial Biomass Furnace JF - Chemical Engineering & Technology Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27747 SN - 1521-4125 VL - 43 IS - 8 SP - 1538 EP - 1546 PB - Wiley ER - TY - JOUR A1 - Shahzad, Azeem A1 - Gulistan, Uzma A1 - Ali, Ramzan A1 - Iqbal, Azhar A1 - Benim, Ali Cemal A1 - Kamran, Muhammad A1 - Khan, Salah Ud-Din A1 - Khan, Shahab Ud-Din A1 - Farooq, Aamir T1 - Numerical Study of Axisymmetric Flow and Heat Transfer in a Liquid Film over an Unsteady Radially Stretching Surface JF - Mathematical Problems in Engineering Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27755 N1 - Acknowledgments The authors would like to sincerely appreciate funding from Researchers Supporting Project (no. RSP-2020/58), King Saud University, Riyadh, Saudi Arabia. R. Ali acknowledges the School of Art and Sciences, University of Central Asia, Kyrgyz Republic, for travel grant to visit the Department of Basic Sciences, UET, Taxila, and CFS, Düsseldorf. VL - 2020 SP - 1 EP - 9 PB - Hindawi ER - TY - JOUR A1 - Basaran, Anil A1 - Benim, Ali Cemal A1 - Yurddas, Ali T1 - Prediction of heat and fluid flow in microchannel condensation JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27768 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - JOUR A1 - Das, Sampad Gobinda A1 - Bhattacharyya, Suvanjan A1 - Chattopadhyay, Himadri A1 - Benim, Ali Cemal T1 - Transport Phenomenon of Simultaneously Developing Flow and Heat Transfer in Twisted Sinusoidal Wavy Microchannel under Pulsating Inlet Flow Condition JF - Heat Transfer Engineering Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27697 SP - 1 EP - 14 PB - Taylor & Francis ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Computational Investigation of Impingement Cooling of Thermoelectric Generators JF - Heat Transfer Engineering Y1 - 2021 U6 - https://doi.org/10.1080/01457632.2019.1699296 SN - 0145-7632 VL - 42 IS - 3-4 SP - 282 EP - 295 PB - Taylor & Francis ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Syed, Khawar, J., T1 - Laminar flamelet modelling of turbulent premixed combustion JF - Applied Mathematical Modelling Y1 - 1998 UR - https://doi.org/10.1016/s0307-904x(98)00012-2 U6 - https://doi.org/10.1016/s0307-904x(98)00012-2 N1 - C 1998 Elsevier Science Inc.All rights reserve VL - 22 IS - 1-2 SP - 113 EP - 136 PB - Elsevier ER - TY - JOUR A1 - Kameier, Frank A1 - Wagner, Thomas A1 - Horvat, Igor A1 - Ullrich, Frank T1 - Experimentelle und numerische Untersuchung zur Strömungsakustik einer Staulippe JF - ATZ Automobiltech Zeitschrift Y1 - 2009 U6 - https://doi.org/10.1007/bf03222094 VL - 111 IS - 7-8 SP - 562 EP - 567 PB - Springer ER - TY - JOUR A1 - Kameier, Frank A1 - Wagner, Thomas A1 - Horvat, Igor A1 - Ullrich, Frank T1 - Experimental and numerical investigation of air dam aeroacoustics JF - ATZ worldwide Y1 - 2009 U6 - https://doi.org/10.1007/bf03225090 VL - 111 IS - 7-8 SP - 54 EP - 59 PB - Springer ER - TY - JOUR A1 - Carapezza, M. L. A1 - Barberi, F. A1 - Ranaldi, M. A1 - Ricci, T. A1 - Tarchini, L. A1 - Barrancos, J. A1 - Fischer, C. A1 - Granieri, D. A1 - Lucchetti, C. A1 - Melian, G. A1 - Perez, N. A1 - Tuccimei, P. A1 - Vogel, A. A1 - Weber, Konradin T1 - Hazardous gas emissions from the flanks of the quiescent Colli Albani volcano (Rome, Italy) JF - Applied Geochemistry Y1 - 2012 UR - https://doi.org/10.1016/j.apgeochem.2012.02.012 U6 - https://doi.org/10.1016/j.apgeochem.2012.02.012 VL - 27 IS - 9 SP - 1767 EP - 1782 PB - Elsevier ER - TY - JOUR A1 - Carapezza, M. L. A1 - Barberi, F. A1 - Ranaldi, M. A1 - Ricci, T. A1 - Tarchini, L. A1 - Barrancos, J. A1 - Fischer, C. A1 - Perez, N. A1 - Weber, Konradin A1 - Di Piazza, A. A1 - Gattuso, A. T1 - Diffuse CO2 soil degassing and CO2 and H2S concentrations in air and related hazards at Vulcano Island (Aeolian arc, Italy) JF - Journal of Volcanology and Geothermal Research Y1 - 2011 U6 - https://doi.org/10.1016/j.jvolgeores.2011.06.010 VL - 207 IS - 3-4 SP - 130 EP - 144 PB - Elsevier ER - TY - JOUR A1 - Wolf, Christian A1 - Gaida, Daniel A1 - Stuhlsatz, André A1 - Ludwig, Thomas A1 - McLoone, Seán A1 - Bongards, Michael T1 - Predicting organic acid concentration from UV/vis spectrometry measurements – a comparison of machine learning techniques JF - Transactions of the Institute of Measurement and Control Y1 - 2013 U6 - https://doi.org/10.1177/0142331211403797 VL - 35 IS - 1 SP - 5 EP - 15 PB - sage journals ER - TY - JOUR A1 - Fleiger, P. M. A1 - Reichardt, Roland A1 - Treiber, K. T1 - High-Precision Power Measurement for the Grindability Test According to Zeisel JF - Chemical Engineering & Technology Y1 - 2012 U6 - https://doi.org/10.1002/ceat.201200118 VL - 35 IS - 11 SP - 1941 EP - 1948 PB - Wiley ER - TY - JOUR A1 - Schramm, Sebastian A1 - Adam, Mario T1 - Storage in Solar Process Heat Applications JF - Energy Procedia KW - Solare-Prozesswärme-Standards Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27244 SN - 1876-6102 N1 - PII: S1876610214003981 VL - 48 SP - 1202 EP - 1209 PB - Elsevier ER - TY - JOUR A1 - Gaida, Philipp A1 - Weinberg, Kerstin A1 - Jahr, Andreas T1 - Viscoelastic modelling and experimental results of a dielectric electro-active polymer diaphragm actuator JF - Proceedings in Applied Mathematics and Mechanics (PAMM) Y1 - 2014 U6 - https://doi.org/10.1002/pamm.201410225 VL - 14 IS - 1 SP - 475 EP - 476 PB - Wiley ER - TY - JOUR A1 - Wiesmann, Thomas A1 - Youn Suh, Sung A1 - Kaluza, Stefan A1 - Lohmann, Heiko A1 - Zeidler‐Fandrich, Barbara T1 - Catalytic Oxygen Removal from Synthetic Coke Oven Gas: A Comparison of Sulfided CoMo/γ‐Al 2 O 3 and NiMo/γ‐Al 2 O 3 Catalysts with Pt/γ‐Al 2 O 3 as Benchmark Catalyst JF - Chemie Ingenieur Technik KW - DEAL Y1 - 2020 U6 - https://doi.org/10.1002/cite.202000067 N1 - The research project is funded by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF, Verbundvorhaben Carbon2Chem®, FKZ: 03EK3040D). Open access funding enabled and organized by Projekt DEAL VL - 92 IS - 10 SP - 1533 EP - 1541 PB - Wiley ER - TY - JOUR A1 - Biedermann, Till M. A1 - Kameier, F. A1 - Paschereit, C. O. T1 - Successive Aeroacoustic Transfer of Leading Edge Serrations From Single Airfoil to Low-Pressure Fan Application JF - Journal of Engineering for Gas Turbines and Power KW - ISAVE Y1 - 2019 U6 - https://doi.org/10.1115/1.4044362 VL - 141 IS - 10 PB - ASME ER - TY - JOUR A1 - Kacso-Vidrean, Lorand A1 - Niemann, Jörg A1 - Baidoc, Raluca A1 - Pisla, Adrian T1 - Change Management Aspects in Solar Energy Implementation JF - Procedia - Social and Behavioral Sciences KW - FliX Y1 - 2018 U6 - https://doi.org/10.1016/j.sbspro.2018.04.021 VL - 238 SP - 432 EP - 441 PB - Elsevier ER - TY - JOUR A1 - Becker, Martin A1 - Lippel, Jens A1 - Stuhlsatz, André A1 - Zielke, Thomas T1 - Robust dimensionality reduction for data visualization with deep neural networks JF - Graphical Models Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-26904 SN - 1524-0703 VL - 108 PB - Elsevier ER - TY - JOUR A1 - Girod, Kai A1 - Lohmann, Heiko A1 - Schlüter, Stefan A1 - Kaluza, Stefan T1 - Methanol Synthesis with Steel-Mill Gases: Simulation and Practical Testing of Selected Gas Utilization Scenarios JF - Processes Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-26928 VL - 8 IS - 12 PB - MDPI ER - TY - JOUR A1 - Biedermann, Till M. A1 - Reich, M. A1 - Paschereit, C. O. T1 - Multi-Objective Modeling of Leading-Edge Serrations Applied to Low-Pressure Axial Fans JF - Journal of Engineering for Gas Turbines and Power Y1 - 2020 UR - https://doi.org/10.1115/1.4048599 U6 - https://doi.org/10.1115/1.4048599 VL - 142 IS - 11 PB - ASME ER - TY - THES A1 - Brummel, Mattis T1 - Performance evaluation of state-of-the-art computer vision systems in the field of autonomous driving in dependency of optical parameters KW - Master KW - SoSe21 Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37508 CY - Düsseldorf ER - TY - THES A1 - Kuhlmann, André T1 - Development of a Confined Spaces Dispatch Software for a Canadian Fire Brigade T1 - Entwicklung einer Einsatzleitsoftware für beengte Räume für eine kanadische Feuerwehrwache N2 - This work focuses on designing an application ecosystem for a Canadian fire department. As it is part of the critical infrastructure, safety and code quality is of main concern. The thesis will go over the complete development life cycle, from planning to the actual implementation of a Computer-Aided Dispatch software for confined spaces. It is looked into the Canadian legislation to derive application flows and data structure from it. At the end, the reader will have a thorough understanding of confined spaces and how to come up with a working application infrastructure. KW - Software Development KW - NG911 KW - Confined Spaces Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37578 CY - Düsseldorf ER - TY - JOUR A1 - Di Gioia, Antonio A1 - Brown, Ian P. A1 - Nie, Yue A1 - Knippel, Ryan A1 - Ludois, Daniel C. A1 - Dai, Jiejian A1 - Hagen, Skyler A1 - Alteheld, Christian T1 - Design and Demonstration of a Wound Field Synchronous Machine for Electric Vehicle Traction With Brushless Capacitive Field Excitation JF - IEEE Transactions on Industry Applications N2 - This paper describes the modeling, optimization, mechanical design, and experimental characterization of a high power density wound field synchronous machine (WFSM) for electric vehicle traction applications. The WFSM is designed for brushless rotor field excitation using an axial flux hydrodynamic capacitive power coupler (CPC). The flexible design environment, which was used for large-scale multiobjective optimization of the WFSM, is described. A prototype WFSM, spray cooled with automatic transmission fluid, with an 80-kW output at a base speed of 4000 r/min has been tested. The prototyped WFSM achieves volumetric torque and power densities of 17.22 N·m/L and 7.19 kW/L referred to the envelope cylindrical volume of the active materials plus spray cooling rings. The specific torque and power densities are 4.69 N·m/kg and 1.95 kW/kg referred to the mass of the active materials and the shaft. The prototyped CPC provided up to 1-kW excitation power with a mass 600 g and volume of 0.271 L. Y1 - 2018 U6 - https://doi.org/10.1109/tia.2017.2784799 VL - 54 IS - 2 SP - 1390 EP - 1403 PB - IEEE ER - TY - JOUR A1 - Heizmann, Michael A1 - Braun, Alexander A1 - Hüttel, Markus A1 - Klüver, Christina A1 - Marquardt, Erik A1 - Overdick, Michael A1 - Ulrich, Markus T1 - Artificial intelligence with neural networks in optical measurement and inspection systems JF - at - Automatisierungstechnik Y1 - 2020 U6 - https://doi.org/10.1515/auto-2020-0006 VL - 68 IS - 6 SP - 477 EP - 487 PB - De Gruyter ER - TY - GEN A1 - Breuer, Christopher A1 - Drees, Tim A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Standorte und Potenziale für Power-to-Gas T2 - e|m|w Y1 - 2012 UR - https://www.emw-online.com/artikel/182128/spitzenkappung-erfordert-intelligente-netzsteuerung IS - 4 PB - Energate ER - TY - JOUR A1 - Langmann, Reinhard A1 - Rojas-Peña, Leandro T1 - PLCs as Industry 4.0 Components in Laboratory Applications JF - International Journal of Online Engineering KW - DOAJ Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28089 SN - 1861-2121 VL - 12 IS - 7 PB - iJOE ER - TY - JOUR A1 - Richter, Jessica A1 - Steenmann, Anna A1 - Schellscheidt, Benjamin A1 - Licht, Thomas T1 - On-Chip Diffusion Bonding creates Stable Interconnections Usable at Temperatures over 300°C JF - International Symposium on Microelectronics Y1 - 2019 U6 - https://doi.org/10.4071/2380-4505-2019.1.000530 VL - 2019 IS - 1 SP - 000530 EP - 000534 PB - IMAPS ER - TY - JOUR A1 - Heinicke, Christian A1 - Baekler, Peter A1 - Hehl, Friedrich W. T1 - Einstein-aether theory, violation of Lorentz invariance, and metric-affine gravity JF - Physical Review D Y1 - 2005 U6 - https://doi.org/10.1103/physrevd.72.025012 VL - 72 IS - 2 PB - APS ER - TY - JOUR A1 - Baekler, Peter A1 - Hehl, Friedrich W. A1 - Nester, James M. T1 - Poincaré gauge theory of gravity: Friedman cosmology with even and odd parity modes: Analytic part JF - Physical Review D Y1 - 2011 U6 - https://doi.org/10.1103/physrevd.83.024001 VL - 83 IS - 2 PB - APS ER - TY - JOUR A1 - Baekler, Peter A1 - Hehl, Friedrich W. T1 - Beyond Einstein–Cartan gravity: quadratic torsion and curvature invariants with even and odd parity including all boundary terms JF - Classical and Quantum Gravity Y1 - 2011 U6 - https://doi.org/10.1088/0264-9381/28/21/215017 VL - 28 IS - 21 PB - IOP ER - TY - JOUR A1 - Kagermann, Dominik A1 - Lang, Kati A1 - Roscher, Angélique T1 - Mehr Lernerfolg durch die Digitalisierung der Lehre JF - Sales Excellence Y1 - 2020 U6 - https://doi.org/10.1007/s35141-020-0392-9 VL - 29 IS - 11 SP - 20 EP - 23 PB - Springer ER - TY - JOUR A1 - Baekler, Peter A1 - Hehl, Friedrich W. T1 - ROTATING BLACK HOLES IN METRIC-AFFINE GRAVITY JF - International Journal of Modern Physics D Y1 - 2006 U6 - https://doi.org/10.1142/s0218271806008589 VL - 15 IS - 5 SP - 635 EP - 668 PB - World Scientific ER - TY - JOUR A1 - Jain, V. K. A1 - Franz, J. H. T1 - Some Design Issues in Infrared Wireless Networks JF - IETE Technical Review Y1 - 2004 U6 - https://doi.org/10.1080/02564602.2004.11417161 VL - 21 IS - 5 SP - 335 EP - 343 PB - Taylor & Francis ER - TY - JOUR A1 - Langmann, Reinhard A1 - Stiller, Michael T1 - Industrial Cloud – Status und Ausblick JF - HMD Praxis der Wirtschaftsinformatik Y1 - 2015 U6 - https://doi.org/10.1365/s40702-015-0162-0 VL - 52 IS - 5 SP - 647 EP - 664 PB - Springer Nature ER - TY - JOUR A1 - Langmann, Reinhard T1 - Distributed Web-Based Control System JF - International Journal of Online Engineering (iJOE) Y1 - 2010 U6 - https://doi.org/10.3991/ijoe.v6i3.1345 VL - 6 IS - 3 PB - iJOE ER - TY - JOUR A1 - Braun, Alexander A1 - Kornmesser, Christoph A1 - Beushausen, Volker T1 - Simultaneous spatial and spectral imaging of lasing droplets JF - Journal of the Optical Society of America N2 - We present an experimental technique that allows the simultaneous spatial imaging and spectral analysis of falling droplets that exhibit lasing. Single droplet investigations serve as, among other purposes, a preliminary study for spray and combustion researchers. The described setup provides a valuable tool for the evaluation of microdroplet investigations with laser-spectroscopic techniques that rely on laser-induced fluorescence (LIF) or similar spectroscopical phenomena. The emphasis is that both spatial and spectral information are obtained from single-shot images of a falling droplet. Furthermore, combining spatial imaging and a spatially resolving optical multichannel analyzer makes a pointwise rastering of the droplets spectrum possible. This allows for the (almost) unambiguous determination of sources of influence on the spectrum of these droplets-such as geometrical distortion and lasing, nondissolved tracer lumps, and similar phenomena. Although the focus is on the experimental technique itself, we supplement detailed studies of lasing in falling microdroplets. These results were obtained with the aim of developing a system for measuring temperature distributions in droplets and sprays. In the light of these results the practice of calibrating a droplets spectrum by use of a bulk liquid sample needs to be critically reviewed. Y1 - 2005 U6 - https://doi.org/10.1364/josaa.22.001772 SN - 0030-3941 VL - 22 IS - 9 SP - 1772 EP - 1779 PB - Optical Society of America ER - TY - CHAP A1 - Christmann, Simon A1 - Busboom, Imke A1 - Feige, Volker K.S. A1 - Haehnel, Hartmut T1 - Towards Automated Quality Inspection Using a Semi-Mobile Robotized Terahertz System T2 - 2020 Third International Workshop on Mobile Terahertz Systems (IWMTS) KW - angle compensation KW - automatic alignment KW - Projekt Smart Production KW - robot KW - terahertz time-domain spectroscopy KW - thickness measurements Y1 - 2020 SN - 978-1-7281-5598-2 U6 - https://doi.org/10.1109/IWMTS49292.2020.9166259 SP - 1 EP - 5 PB - IEEE CY - Essen ER - TY - JOUR A1 - Balzer, Chr. A1 - Braun, Alexander A1 - Hannemann, T. A1 - Paape, Chr. A1 - Ettler, M. A1 - Neuhauser, W. A1 - Wunderlich, Chr. T1 - Electrodynamically trapped Yb+ ions for quantum information processing JF - Physical Review A Y1 - 2006 U6 - https://doi.org/10.1103/PhysRevA.73.041407 SN - 2469-9934 VL - 73 IS - 4 PB - American Physical Society ER - TY - JOUR A1 - Schuller, Bjorn A1 - Vlasenko, Bogdan A1 - Eyben, Florian A1 - Wollmer, Martin A1 - Stuhlsatz, André A1 - Wendemuth, Andreas A1 - Rigoll, Gerhard T1 - Cross-Corpus Acoustic Emotion Recognition: Variances and Strategies JF - IEEE Transactions on Affective Computing Y1 - 2010 U6 - https://doi.org/10.1109/t-affc.2010.8 VL - 1 IS - 2 SP - 119 EP - 131 PB - IEEE ER - TY - JOUR A1 - Lyalina, Yuliya A1 - Langmann, Reinhard A1 - Krisilov, V. T1 - The Interaction Model in iLearning Environments and its Use in the Smart Lab Concept JF - International Journal of Online Engineering Y1 - 2011 U6 - https://doi.org/10.3991/ijoe.v7i4.1793 VL - 7 IS - 4 PB - iJOE ER - TY - JOUR A1 - Queval, Loic A1 - Gottkehaskamp, Raimund T1 - Analytical Field Calculation of Modulated Double Helical Coils JF - IEEE Transactions on Applied Superconductivity Y1 - 2015 U6 - https://doi.org/10.1109/tasc.2015.2477377 VL - 25 IS - 6 SP - 1 EP - 7 PB - IEEE ER - TY - JOUR A1 - Franz, Jürgen T1 - Benefits of Communication Methods in Environmental Protection JF - IETE Technical Review Y1 - 1996 U6 - https://doi.org/10.1080/02564602.1996.11416600 VL - 13 IS - 3 SP - 153 EP - 162 PB - Taylor & Francis ER - TY - GEN A1 - Braun, Alexander T1 - Laserspektroskopische Messverfahren zur Temperaturbestimmung in Sprays Y1 - 2001 PB - Georg-August-Universität Göttingen CY - Göttingen ER - TY - JOUR A1 - Tseng, Ethan A1 - Mosleh, Ali A1 - Mannan, Fahim A1 - St-Arnaud, Karl A1 - Sharma, Avinash A1 - Peng, Yifan A1 - Braun, Alexander A1 - Nowrouzezahrai, Derek A1 - Lalonde, Jean-François A1 - Heide, Felix T1 - Differentiable Compound Optics and Processing Pipeline Optimization for End-to-end Camera Design JF - ACM Transactions on Graphics N2 - Most modern commodity imaging systems we use directly for photography‐-or indirectly rely on for downstream applications‐-employ optical systems of multiple lenses that must balance deviations from perfect optics, manufacturing constraints, tolerances, cost, and footprint. Although optical designs often have complex interactions with downstream image processing or analysis tasks, today’s compound optics are designed in isolation from these interactions. Existing optical design tools aim to minimize optical aberrations, such as deviations from Gauss’ linear model of optics, instead of application-specific losses, precluding joint optimization with hardware image signal processing (ISP) and highly parameterized neural network processing. In this article, we propose an optimization method for compound optics that lifts these limitations. We optimize entire lens systems jointly with hardware and software image processing pipelines, downstream neural network processing, and application-specific end-to-end losses. To this end, we propose a learned, differentiable forward model for compound optics and an alternating proximal optimization method that handles function compositions with highly varying parameter dimensions for optics, hardware ISP, and neural nets. Our method integrates seamlessly atop existing optical design tools, such as Zemax. We can thus assess our method across many camera system designs and end-to-end applications. We validate our approach in an automotive camera optics setting‐-together with hardware ISP post processing and detection‐-outperforming classical optics designs for automotive object detection and traffic light state detection. For human viewing tasks, we optimize optics and processing pipelines for dynamic outdoor scenarios and dynamic low-light imaging. We outperform existing compartmentalized design or fine-tuning methods qualitatively and quantitatively, across all domain-specific applications tested. Y1 - 2021 U6 - https://doi.org/10.1145/3446791 SN - 1557-7368 VL - 40 IS - 2 SP - 1 EP - 19 PB - Association for Computing Machinery CY - New York, NY, USA ER - TY - JOUR A1 - Johanning, M. A1 - Braun, Alexander A1 - Timoney, N. A1 - Elman, V. A1 - Neuhauser, W. A1 - Wunderlich, Chr T1 - Individual addressing of trapped ions and coupling of motional and spin states using RF radiation JF - Physical review letters N2 - Individual electrodynamically trapped and laser cooled ions are addressed in frequency space using radio-frequency radiation in the presence of a static magnetic field gradient. In addition, an interaction between motional and spin states induced by an rf field is demonstrated employing rf optical double resonance spectroscopy. These are two essential experimental steps towards realizing a novel concept for implementing quantum simulations and quantum computing with trapped ions. Y1 - 2009 UR - http://www.ncbi.nlm.nih.gov/pubmed/19257664 U6 - https://doi.org/10.1103/PhysRevLett.102.073004 SN - 1079-7114 VL - 102 IS - 7 PB - American Physical Society ER - TY - CHAP A1 - Johanning, M. A1 - Braun, Alexander A1 - Elman, V. A1 - Wunderlich, Chr. A1 - Neuhauser, W. T1 - Individual Addressing with Trapped Yb+ Ions T2 - 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 17.06.2007 - 22.06.2007, Munich, Germany Y1 - 2007 UR - http://ieeexplore.ieee.org/document/4386787/ SN - 978-1-4244-0930-3 U6 - https://doi.org/10.1109/CLEOE-IQEC.2007.4386787 PB - IEEE CY - München ER - TY - JOUR A1 - Johanning, M. A1 - Braun, Alexander A1 - Eiteneuer, D. A1 - Paape, C. A1 - Balzer, C. A1 - Neuhauser, W. A1 - Wunderlich, C. T1 - Resonance-enhanced isotope-selective photoionization of YbI for ion trap loading JF - Applied Physics B Y1 - 2011 UR - https://arxiv.org/pdf/0712.0969.pdf U6 - https://doi.org/10.1007/s00340-011-4502-7 SN - 1432-0649 VL - 103 IS - 2 SP - 327 EP - 338 PB - Springer Nature ER - TY - CHAP A1 - Mueller, Patrick A1 - Lehmann, Matthias A1 - Braun, Alexander T1 - Simulating tests to test simulation T2 - IS&T International Symposium on Electronic Imaging 2020: Autonomous Vehicles and Machines, 26 January 2020 — 30 January 2020, Burlingame, CA, USA Y1 - 2020 U6 - https://doi.org/10.2352/ISSN.2470-1173.2020.16.AVM-149 VL - 2020 IS - 16 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Wittpahl, Christian A1 - Zakour, Hatem Ben A1 - Lehmann, Matthias A1 - Braun, Alexander T1 - Realistic Image Degradation with Measured PSF JF - Electronic Imaging, Autonomous Vehicles and Machines 2018 KW - SiL/HiL Y1 - 2018 U6 - https://doi.org/10.2352/ISSN.2470-1173.2018.17.AVM-149 SN - 2470-1173 IS - 17 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Krebs, Christian A1 - Müller, Patrick A1 - Braun, Alexander T1 - Impact of Windshield Optical Aberrations on Visual Range Camera Based Classification Tasks Performed by CNNs JF - London Imaging Meeting Y1 - 2021 SN - 0-89208-346-6 U6 - https://doi.org/10.2352/issn.2694-118X.2021.LIM-83 SN - 2694-118X VL - 2021 IS - 1 SP - 83 EP - 87 PB - Ingenta connect ER - TY - JOUR A1 - Braun, Alexander T1 - Automotive mass production of camera systems: Linking image quality to AI performance JF - tm - Technisches Messen N2 - Artificial intelligence methods based on machine learning or artificial neural networks have become indispensable in camera-based driver assistance systems, and also represent an essential building block for future autonomous driving. However, the great successes of these evaluation methods in environment perception and also driving planning are accompanied by equally great challenges in the validation and verification of these systems. One of the essential aspects for this is the required guaranteed safety of the functions under mass production conditions of the vehicles. This article explains this point of view using a detailed example from the field of camera-based driver assistance systems: the determination of inspection limits at the end of the production line. The camera is one of the most important sensor modalities for vehicle environment sensing and as such, the quality of the camera systems plays a key role in the safety argumentation of the overall system. Several illustrative application examples (role of simulations, calibration, influence of the windshield) will be presented. The basic ideas presented can be well transferred to the other sensor modalities (lidar, radar, ToF, etc.). The investigations/evidence show that doubts are allowed whether or how fast autonomous driving on level L4/5 will take hold as robotaxis or – even more challenging – in private ownership on a larger scale. KW - Electrical and Electronic Engineering KW - Instrumentation Y1 - 2022 U6 - https://doi.org/10.1515/teme-2022-0029 SN - 2196-7113 PB - Walter de Gruyter ER - TY - CHAP A1 - Becker, Andreas A1 - Loges, Hauke A1 - Kippelt, Stefan A1 - Gitis, Alexander A1 - Merei, Ghada A1 - Echternacht, David A1 - Müller, Marcus A1 - Zeh, Alexander A1 - Kleimaier, Martin A1 - Leuthold, Matthias A1 - Hesse, Holger C. A1 - Beck, Hans-Peter A1 - Engel, Bernd A1 - Jossen, Andreas A1 - Moser, Albert A1 - Rehtanz, Christian A1 - Sauer, Dirk-Uwe A1 - Witzmann, Rolf T1 - Electricity Storage Systems in Medium- and Low-Voltage Networks T2 - Proceedings of International ETG Congress 2015: Die Energiewende - blueprints for the new energy age : date: 17-18 Nov. 2015 Y1 - 2015 SN - 9783800741212 SP - 151 EP - 158 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Balzer, Chr. A1 - Hannemann, Th. A1 - Wunderlich, Chr. A1 - Braun, Alexander A1 - Ettler, M. A1 - Paape, Chr. A1 - Neuhauser, W. T1 - Efficient photoionisation, preparation and coherent manipulation of trapped /sup 171/Yb/sup +/-ions T2 - EQEC '05. European Quantum Electronics Conference, 12-17 June 2005, Munich Y1 - 2005 UR - http://ieeexplore.ieee.org/document/1567474/ SN - 0-7803-8973-5 U6 - https://doi.org/10.1109/EQEC.2005.1567474 SP - 308 PB - IEEE ER - TY - CHAP A1 - Breuer, Christopher A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Technical and economic comparison of national and joint cross-border curative congestion management application T2 - 2011 8th International Conference on the European Energy Market (EEM), 25.05.2011 - 27.05.2011, Zagreb, Croatia Y1 - 2011 UR - http://ieeexplore.ieee.org/document/5952974/ SN - 978-1-61284-285-1 U6 - https://doi.org/10.1109/EEM.2011.5952974 SP - 33 EP - 38 PB - IEEE ER - TY - CHAP A1 - Breuer, Christopher A1 - Drees, Tim A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Identification of potentials and locations for power-to-gas in germany T2 - 6. EUROSOLAR-Konferenz "Stadtwerke mit erneuerbaren Energien", 21.-22. Juni 2012, Heidelberg Y1 - 2012 SN - 978-3-00-037648-1 PB - Eurosolar CY - Berlin ER - TY - BOOK A1 - Buchholz, B. A1 - Jeromin, I. A1 - Asgarieh, L. A1 - Echternacht, David A1 - Fan, M. A1 - Repo, S. A1 - Dedekind, K. A1 - Ma, Z. A1 - Gramme, E. T1 - Asset management for distribution networks with high penetration of distributed energy resources Y1 - 2018 CY - Cigré ER - TY - THES A1 - Echternacht, David T1 - Optimierte Positionierung von Messtechnik zur Zustandsschätzung in Verteilnetzen. Zugl.: Aachen, Techn. Hochsch., Diss., 2014 T2 - Aachener Beiträge zur Energieversorgung Y1 - 2015 UR - http://d-nb.info/1066589119/04 SN - 9783941704480 PB - Printproduction Wolff CY - Aachen ER - TY - JOUR A1 - Echternacht, David A1 - Linnemann, Christian A1 - Drees, Tim A1 - Breuer, Christopher A1 - Moser, Albert T1 - Wechselwirkungen zwischen Druckluftspeichern und Netzengpässen in zukünftigen Energiesystemen JF - Solarzeitalter : Politik, Kultur und Ökonomie erneuerbarer Energien Y1 - 2013 VL - 25 IS - 1 SP - 54 EP - 59 PB - EUROSOLAR Verl. ER - TY - GEN A1 - Breuer, Christopher A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Der Norden und der Osten brauchen Windgas T2 - E 21-Magazin : Energie für morgen Y1 - 2012 IS - 2 SP - 46 EP - 47 PB - Energate ER - TY - CHAP A1 - Echternacht, David A1 - Franken, Muriel A1 - Moser, Albert A1 - Geulen, Uwe A1 - Zimmer, Peter A1 - Feilhauer, Werner A1 - Schrieder, W. T1 - Smart Area Aachen - in field test of meter placement and state estimation algorithms for distribution grids T2 - 2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 05.10.2015 - 07.10.2015, Montevideo Y1 - 2015 UR - http://ieeexplore.ieee.org/document/7381194/ SN - 978-1-4673-6605-2 U6 - https://doi.org/10.1109/ISGT-LA.2015.7381194 SP - 435 EP - 439 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - El Haouati, I. A1 - Schermuly, Rainer A1 - Meyer, F. ED - Schulz, Detlef T1 - Simulating the impact of e-mobility charging infrastructure on urban low-voltage networks. Postersession T2 - NEIS 2018: Conference on Sustainable Energy Supply and Energy Storage Systems. Hamburg, Deutschland, 20.09.-21.09.2018 Y1 - 2018 SN - 978-3-8007-4821-1 SP - 208 EP - 213 PB - VDE CY - Frankfurt am Main; Piscataway, NJ ER - TY - CHAP A1 - Echternacht, David A1 - Eickmann, Jonas A1 - Moser, Albert T1 - Quantifizierung des Nutzens von Smart Metern zur Zustandsschätzung in der Verteilnetzebene T2 - Innehalten und Ausblick: Effektivität und Effizienz für die Energiewende / 13. Symposium Energieinnovation, 12. - 14. Februar 2014, TU Graz Y1 - 2014 UR - https://www.tugraz.at/fileadmin/user_upload/Events/Eninnov2014/files/kf/KF_Eickmann_Smart.pdf PB - TU Graz CY - Graz ER - TY - CHAP A1 - Echternacht, David A1 - Heuberger, Daniel A1 - Breuer, Christopher A1 - Linnemann, Christian A1 - Moser, Albert T1 - Advantageous positions for HVDC terminals in Europe T2 - 2013 IEEE Energytech, 21.05.2013 - 23.05.2013, Cleveland Y1 - 2013 UR - http://ieeexplore.ieee.org/document/6645291/ SN - 978-1-4673-4444-9 U6 - https://doi.org/10.1109/EnergyTech.2013.6645291 SP - 1 EP - 5 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Linnemann, Christian A1 - Drees, Tim A1 - Breuer, Christopher A1 - Moser, Albert ED - EUROSOLAR and the World Council for Renewable Energy, T1 - Large-Scale Storage Technologies in the Context of future German Transmission Grid Congestions T2 - 7th International Renewable Energy Storage Conference, 12.11.-14.11.2012, Berlin Y1 - 2012 CY - Berlin ER - TY - CHAP A1 - Echternacht, David A1 - Kleimaier, Martin A1 - Moser, Albert T1 - Kostenoptimale Positionierung von Messtechnik zur Zustandsschätzung in der Verteilnetzebene unter Berücksichtigung stochastisch abhängiger Messfehler T2 - Internationaler ETG-Kongress 2013 - Energieversorgung auf dem Weg nach 2050 - Symposium 1: Security in Critical Infrastructures Today 11/05/2013 - 11/06/2013, Berlin Y1 - 2013 SP - 1 EP - 8 PB - VDE CY - Berlin ER - TY - CHAP A1 - Echternacht, David A1 - Feilhauer, Werner A1 - Franken, Muriel A1 - Geulen, Uwe A1 - Moser, Albert A1 - Schrieder, Werner A1 - Zimmer, Peter T1 - Smart Area Aachen - Zustandsschätzung in Verteilnetzen T2 - Von Smart Grids zu Smart Markets 2015 - Beiträge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland Y1 - 2015 PB - ETG CY - Kassel ER - TY - CHAP A1 - Echternacht, David A1 - Fellhauer, W. A1 - Geulen, Uwe A1 - Schrieder, Werner A1 - Zimmer, Peter T1 - Smart Area Aachen - State Estimation in Distribution Grids T2 - Worls Smart Grid Forum 2013, Berlin, 23-25 September 2013 Y1 - 2013 SP - 1 EP - 6 CY - Berlin ER - TY - GEN A1 - Echternacht, David T1 - Spitzenkappung erfordert intelligente Netzsteuerung T2 - e|m|w Y1 - 2018 UR - https://www.emw-online.com/artikel/182128/spitzenkappung-erfordert-intelligente-netzsteuerung IS - 2 PB - Energate ER - TY - CHAP A1 - Echternacht, David A1 - Stagge, Hanno A1 - Priebe, Jens A1 - Wiernes, Pablo Ezequiel A1 - Jagielski, Kai A1 - Petri, Anne-Kathrin A1 - Drießen, Sarah A1 - Trevisan, Bianka A1 - Digmayer, Claas A1 - Oberst, Christian A. A1 - Keysselitz, Bärbel A1 - Kremer, Martin A1 - Sieber, Sandra A1 - Krapp, Stefan A1 - Jakobs, Eva-Maria A1 - Frenz, Martin A1 - Lohrberg, Frank A1 - Wachten, Kunibert A1 - Moser, Albert T1 - Modelling, Planning, Design and Evaluation of DC-Distribution Grids T2 - International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn Y1 - 2015 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7388494 SP - 289 EP - 295 PB - VDE-Verl. CY - Bonn ER - TY - CHAP A1 - Kippelt, Stefan A1 - Rehtanz, Christian A1 - Gitis, Alexander Mihailovic A1 - Leuthold, Matthias A1 - Sauer, Dirk Uwe A1 - Echternacht, David A1 - Rotering, Niklas A1 - Moser, Albert A1 - Kleimaier, Martin A1 - Loges, Hauke A1 - Becker, Andreas A1 - Aundrup, Thomas A1 - Berthold, Andreas A1 - Pokojski, Martin T1 - Dezentrale Energiespeicher: Studie zu Stromspeichern in der Nieder- und Mittelspannungsebene T2 - Von Smart Grids zu Smart Markets 2015 - Beiträge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland Y1 - 2015 PB - ETG CY - Kassel ER - TY - CHAP A1 - Gitis, Alexander A1 - Sauer, Dirk-Uwe A1 - Moser, Albert A1 - Echternacht, David A1 - Kleimaier, Martin A1 - Becker, Andreas A1 - Aundrup, Thomas A1 - Berthold, Andreas A1 - Pokojski, Martin A1 - Leuthold, Matthias A1 - Rotering, Niklas T1 - Dezentrale Energiespeicher: Einsatzmöglichkeiten, Bedarf und Wirtschaftlichkeit T2 - VDE-Kongress 2014 - Smart Cities - Intelligente Lösungen für das Leben in der Zukunft 20.10.2014 - 21.10.2014 in Frankfurt am Main Y1 - 2014 SP - 1 EP - 6 PB - VDE CY - Frankfurt am Main ER - TY - CHAP A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Optimized positioning of measurements in distribution grids T2 - 2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 14.10.2012 - 17.10.2012, Berlin Y1 - 2012 UR - http://ieeexplore.ieee.org/document/6465628/ SN - 978-1-4673-2597-4 U6 - https://doi.org/10.1109/ISGTEurope.2012.6465628 SP - 1 EP - 7 PB - IEEE ER - TY - BOOK A1 - Echternacht, David A1 - Moser, Albert T1 - Cost optimal meter placement in low and medium voltagte grids considering stochastic dependencies T3 - IEEE PES ISGT Europe 2013, 06.10.2013 - 09.10.2013, Lyngby Y1 - 2013 UR - http://ieeexplore.ieee.org/document/6695335/ SN - 978-1-4799-2984-9 U6 - https://doi.org/10.1109/ISGTEurope.2013.6695335 SP - 1 EP - 5 PB - IEEE ER - TY - CHAP A1 - Linnemann, Christian A1 - Echternacht, David A1 - Breuer, Christopher A1 - Heuberger, Daniel A1 - Moser, Albert T1 - Ermittlung vorteilhafter HGÜ-Anschlussknoten T2 - Smart Grid: Intelligente Energieversorgung der Zukunft ; Kongressbeitäge ; 5. - 6. November 2012, Internationales Congresscenter Stuttgart (ICS) Y1 - 2012 SN - 978-3-8007-3446-7 PB - VDE-Verl. CY - Berlin ER - TY - CHAP A1 - Echternacht, David A1 - Schultze, Nico ED - Cichowski, Rolf Rüdiger T1 - Integriertes Asset Management als Basis einer Energiewendegerechten Instandhaltungs- und Investitionsstrategie T2 - Anlagentechnik 2018: Anlagentechnik für elektrische Verteilungsnetze Y1 - 2018 SN - 9783802211669 VL - Anlagentechnik für elektrische Verteilungsnetze SP - 167 EP - 173 PB - EW Medien und Kongresse CY - Frankfurt am Main ER - TY - CHAP A1 - Echternacht, David A1 - Neusel-Lange, N. A1 - Schermuly, Rainer A1 - Meyer, F. T1 - Target Network Planning and Asset Condition Assessment as Basis for an integrated Asset Management Approach T2 - ETG Congress 2017, Bonn, 28.11.-29.11.2017 Y1 - 2017 CY - Bonn ER - TY - CHAP A1 - Echternacht, David A1 - Schermuly, Rainer ED - Cichowski, Rolf Rüdiger T1 - Simulation der Auswirkungen privater Ladeinfrastruktur auf Niederspannungsnetze T2 - Anlagentechnik 2020 Y1 - 2019 SN - 978-3-8007-4838-9 SP - 149 EP - 158 PB - VDE Verlag CY - Berlin ET - Neuerscheinung ER - TY - CHAP A1 - Neme, Christopher A1 - Seefeldt, Friedrich A1 - Gottstein, Meg A1 - Echternacht, David A1 - Moser, Albert A1 - Weston, Frederick T1 - The Positive Effects of Energy Efficiency on the German Electricity Sector: Peer-reviewed paper presented at IEPPEC 2014 International Energy Policies & Programmes Evaluation Conference T2 - 15. International Energy Policies & Programmes Evaluation Conference (IEPEC), Berlin, Deutschland, 09.09-11.09.2014 Y1 - 2014 UR - https://www.agora-energiewende.de/en/publications/the-positive-effects-of-energy-efficiency-on-the-german-electricity-sector/ SP - 1 EP - 16 CY - Berlin ER - TY - CHAP A1 - Linnemann, Christian A1 - Echternacht, David A1 - Breuer, Christopher A1 - Moser, Albert T1 - Modeling optimal redispatch for the European Transmission grid T2 - 2011 IEEE Trondheim PowerTech,19.06.2011 - 23.06.2011, Trondheim Y1 - 2011 UR - http://ieeexplore.ieee.org/document/6019442/ SN - 978-1-4244-8418-8 U6 - https://doi.org/10.1109/PTC.2011.6019442 SP - 1 EP - 8 PB - IEEE ER - TY - CHAP A1 - Adam, Mario T1 - Künstliche Intelligenz zur Betriebsoptimierung eines Nahwärmenetzes in Kempen mit verschiedenen regenerativen Energiequellen T2 - Berliner Energietage, 22. April 2021, Berlin KW - BestHeatNet Y1 - 2021 CY - Düsseldorf ER - TY - CHAP A1 - Neumann, Hannah A1 - Adam, Mario A1 - Backes, Klaus A1 - Börner, Martin A1 - Clees, Tanja A1 - Doetsch, Christian A1 - Glaeser, Susanne A1 - Herrmann, Ulf A1 - May, Johanna A1 - Rosenthal, Florian A1 - Sauer, Dirk Uwe A1 - Stadler, Ingo T1 - Development of open educational resources for renewable energy and the energy transition process T2 - ISES SWC 2021: Solar World Congress Virtual Conference, 25.-29. Oktober 2021 KW - OER4EE Y1 - 2021 ER - TY - CHAP A1 - Müller, Benedikt A1 - Adam, Mario T1 - Multikriterielle Auslegung Deutschlands bislang größter solarthermischen Anlage zur Integration in ein Bestandsfernwärmenetz T2 - RET-Con – 5. Regenerative Energietechnik Konferenz, 10. - 11. Februar 2022, Nordhausen KW - Sol-FWK Y1 - 2022 CY - Neuhausen ER - TY - CHAP A1 - Winnitzki, Michael A1 - Spiegel, Thomas A1 - Adam, Mario T1 - Ansätze des maschinellen Lernens für die Prognose des Strombedarfes von Ortsnetzstationen als Beitrag für Steuerungsaufgaben in der Niederspannung. Postersession T2 - Innovationen im Verteilernetz: ETG-CIRED-Workshop 2021 (D-A-CH) 02.-03.11.2021, München KW - Windheizung 2.0 KW - ZIES Y1 - 2021 CY - München ER - TY - JOUR A1 - Deniz Canal, Cansu A1 - Boke, Yakup Erhan A1 - Aydin, Ozer A1 - Benim, Ali Cemal T1 - COMPUTATIONAL ANALYSIS OF PULVERIZED COAL CO-FIRING WITH BIOMASS IN 150MWe UNIT OF TUNCBILEK THERMAL POWER PLANT JF - Isi Bilimi ve Teknigi Dergisi - Journal of Thermal Science and Technology Y1 - 2021 U6 - https://doi.org/10.47480/isibted.979314 SN - 1300-3615 VL - 41 IS - 1 SP - 37 EP - 50 ER - TY - CHAP A1 - Schomaker, Rahel M. A1 - Lobnig, Christina A. A1 - Deckert, Carsten ED - Schüll, Elmar ED - Berner, Heiko ED - Kolbinger, Martin Lu ED - Pausch, Markus T1 - Soziale Innovation in und durch die öffentliche Verwaltung – theoretische Überlegungen und empirische Ergebnisse für Österreich T2 - Soziale Innovation im Kontext: Beiträge zur Konturierung eines unscharfen Konzepts Y1 - 2022 SN - 978-3-658-37221-7 U6 - https://doi.org/10.1007/978-3-658-37221-7_9 N1 - Projekt: Alpine Social Innovation Strategy - ASIS SP - 205 EP - 225 PB - Springer CY - Wiesbaden ER - TY - GEN ED - Deckert, Carsten T1 - CSR und Logistik: Spannungsfelder Green Logistics und City-Logistik Y1 - 2021 SN - 978-3-662-63569-8 U6 - https://doi.org/10.1007/978-3-662-63570-4 VL - Management-Reihe Corporate Social Responsibility PB - Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - Deckert, Carsten ED - Deckert, Carsten T1 - Nachhaltige Logistik: Verbesserte Ressourcennutzung und Umweltverträglichkeit durch Green Logistics und City-Logistik T2 - CSR und Logistik: CSR und Logistik: Spannungsfelder Green Logistics und City-Logistik Y1 - 2021 U6 - https://doi.org/10.1007/978-3-662-63570-4_1 VL - Management-Reihe Corporate Social Responsibility SP - 3 EP - 44 PB - Springer Gabler CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - Deckert, Carsten A1 - Mohya, Ahmed ED - Deckert, Carsten T1 - Nachhaltige Lagerung: Vom Lagerbau bis zum Lagerbetrieb T2 - CSR und Logistik: Spannungsfelder Green Logistics und City-Logistik Y1 - 2021 U6 - https://doi.org/10.1007/978-3-662-63570-4_7 VL - Management-Reihe Corporate Social Responsibility SP - 149 EP - 167 PB - Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - von Berg, Markus A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - Comparing individual perception of timbre and reverberance BT - Proceedings of the 24th International Congress on Acoustics N2 - Room reverberation alters the spatial impression and timbre of a sound by modulating its spectral and temporal characteristics. Thus, we argue that, on a perceptual level, reverberation basically breaks down into interaural differences and spectro-temporal cues and that the separation of a perceived timbre into a sound source and a surrounding room is a purely cognitive process. To investigate the connection between the perception of reverberation cues and timbre analysis, the sensitivity for changes in reverberation was compared to timbre perception abilities. The Timbre Perception Test was used to measure the perception of the temporal envelope, spectral centroid, and spectral flux of artificial sounds. Sensitivity for changes in reverberation time was tested with a discrimination task using speech and noise with speech-alike spectral and temporal envelopes as source signals. Musical and acoustical expertise was assessed through the Goldsmiths Musical Sophistication Index and self-reports on experience with and knowledge of acoustics. There was a considerable correlation between timbre and reverberance perception ability, but timbre perception and academic experience predicted only 41% of the variance in reverberance perception. Still, perception abilities related to similar acoustical phenomena seem to be better indicators of listening skills than self-reports on acoustical or musical expertise. KW - Timbre KW - Klangfarbe KW - Reverberation KW - Nachhall Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-38706 UR - https://ica2022korea.org/data/Proceedings_A11.pdf CY - Gyeoungju, Südkorea ER - TY - RPRT A1 - Deckert, Carsten A1 - Keszler, Julia A1 - Schmitz, Helen A1 - Mohya, Ahmed T1 - Forecasting Game: Teaching Prospective Engineers Quantitative Forecasting Techniques with a Simulation Game N2 - In order to determine demand as precisely as possible, many businesses use several forecasting methods. The aim of forecasting is to determine future demand based on data from the past. The use of a specific method is not always easy and depends on a number of factors. To help prospective engineers find the most suitable forecasting method for a specific problem, a forecasting game was developed and then evaluated. The paper describes the design and the evaluation of the forecasting game. In order to provide an overview of existing forecasting methods, the first part of the paper examined the mathematical fundamentals of eight different forecasting methods and outlined the requirements for their application. The second part of the paper describes the creation of a forecasting game in which prospective engineers can learn how to determine the appropriate forecasting method for specific scenarios. In total, five scenarios covering the three different demand patterns (linear/stationary, trend and seasonal) as well as the forecast quality methods were developed and can be played through. For each scenario, the player has to choose the most appropriate forecasting method for a specific problem based on a self-created task description. To make the game as realistic as possible, a fictional company with a background story was designed. The last part was about the evaluation of the forecasting game. For the evaluation, a student survey to gather the opinions of the students was conducted. The results of the student survey show an overall positive evaluation of the simulation game by the students. However, the test also showed that the game takes a certain amount of time. Since only 15 of the approximately 30 students who tested the game participated in the evaluation, the results are not significant. T3 - Working Papers in Industrial Engineering - 5 Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-39057 CY - Düsseldorf ER - TY - JOUR A1 - Falling, Luisa A1 - Kaluza, Stefan A1 - Strucks, Peter T1 - A Short Review on Ni-Catalyzed Methanation of CO²: Reaction Mechanism, Catalyst Deactivation, Dynamic Operation JF - Chemie Ingenieur Technik N2 - Today, the use of renewable energies and recycling of climate-changing gases are increasingly important. In this context,coupling of methanation with small, decentralized CO2sources such as biogas plants provides one possibility. However,fluctuating availability of renewables for hydrogen production in combination with small storage volumes result in anenhanced demand for dynamic process operation. This leads to new research challenges with respect to the required cata-lysts and the overall process design. To draw reliable conclusions about the catalytic performance under dynamic processoperation, the mechanism of the methanation reaction as well as typical deactivation procedures of the catalyst appliedunder steady-state conditions have to be reviewed thoroughly. KW - Power-to-gas KW - Ni catalysts KW - Dynamic operation KW - Deactivation KW - CO2Methanation Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-32134 SN - 1522-2640 VL - 93 SP - 1526 EP - 1536 PB - Wiley ER - TY - JOUR A1 - Biedermann, Till M. A1 - Reich, Marius A1 - Kameier, Frank A1 - Adam, Mario T1 - Assessment of statistical sampling methods and approximation models applied to aeroacoustic and vibroacoustic problems JF - Advances in Aircraft and Spacecraft Science KW - artificial neural networks KW - design of experiments KW - Latin hypercube sampling KW - aeroacoustics KW - aerodynamics KW - spectral analysis Y1 - 2019 UR - http://www.techno-press.org/content/?page=article&journal=aas&volume=6&num=6&ordernum=7 U6 - https://doi.org/10.12989/aas.2019.6.6.531 SN - 2287-528X VL - 6 IS - 6 SP - 529 EP - 550 PB - Techno Press ER - TY - CHAP A1 - Goebel, Johannes A1 - Kowalski, Marek A1 - Frank, Lena A1 - Adam, Mario T1 - Rechnersimulationen Zum Winter- Und Sommerbetrieb Einer Abwasser-Gaswärmepumpe/- Kältemaschine T2 - Deutsche Kaelte-und Klimatagung 2016, 16 - 18 November 2016, Kassel Kassel KW - Abwasser-Gas-WP/KM Y1 - 2017 SN - 978-1-5108-3656-3 N1 - ÖffentlichInhaltsverzeichnis: proceedings.com/content/033/033625webtoc.pdf SP - 440 EP - 458 PB - Deutscher Kalte- und Klimatechnisher Verein (DKV) CY - Hannover ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Canal, Cansu Deniz A1 - Boke, Yakup Erhan T1 - A Validation Study for RANS Based Modelling of Swirling Pulverized Fuel Flames JF - Energies N2 - A swirling pulverized coal flame is computationally investigated. A Eulerian–Lagrangian formulation is used to describe the two-phase flow. Turbulence is modelled within a RANS (Reynolds averaged numerical simulation) framework. Four turbulence viscosity- (TV) based models, namely the standard k-ε model, realizable k-ε model, renormalization group theory k-ε model, and the shear stress transport k-ω model are used. In addition, a Reynolds stress transport model (RSM) is employed. The models are assessed by comparing the predicted velocity fields with the measurements of other authors. In terms of overall average values, the agreement of the predictions to the measurements is observed to be within the range 20–40%. A better performance of the RSM compared to the TV models is observed, with a nearly twice as better overall agreement to the experiments, particularly for the swirl velocity. In the second part of the investigation, the resolution of the discrete particle phase in modelling the turbulent particle dispersion (TPD) and particle size distribution (SD) is investigated. Using the discrete random walk model for the TPD, it is shown that even five random walks are sufficient for an accuracy that is quite high, with a less than 1% mean deviation from the solution obtained by thirty random walks. The approximation of the measured SD is determined by a continuous Rosin–Rammler distribution function, and inaccuracies that can occur in its subsequent discretization are demonstrated and discussed. An investigation on the resolution of the SD by discrete particle size classes (SC) indicates that 12 SC are required for an accuracy with a less than 1% mean deviation from the solution with 18 SC. Although these numbers may not necessarily be claimed to be sufficiently universal, they may serve as guidance, at least for SD with similar characteristics KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37365 SN - 1996-1073 VL - 14 IS - 21 PB - MDPI ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Frank, Thiemo A1 - Assmann, Alexander A1 - Lichtenberg, Artur A1 - Akhyari, Payam T1 - Computational investigation of hemodynamics in hardshell venous reservoirs: A comparative study JF - Artificial Organs N2 - Extracorporeal circulation using heart‐lung‐machines is associated with a profound activation of corpuscular and plasmatic components of circulating blood, which can also lead to deleterious events such as systemic inflammatory response and hemolysis. Individual components used to install the extracorporeal circulation have an impact on the level of activation, most predominantly membrane oxygenators and hardshell venous reservoirs as used in extracorporeal systems. The blood flows in two different hardshell reservoirs are computationally investigated. A special emphasis is placed on the prediction of an onset of transition and turbulence generation. Reynolds‐averaged numerical simulations (RANS) based on a transitional turbulence model, as well as large eddy simulations (LES) are applied to achieve an accurate prediction. In the LES analysis, the non‐Newtonian behavior of the blood is considered via the Carreau model. Blood damage potential is quantified applying the Modified Index of Hemolysis (MIH) based on the predicted flow fields. The results indicate that the flows in both reservoirs remain predominantly laminar. For one of the reservoirs, considerable turbulence generation is observed near the exit site, caused by the specific design for the connection with the drainage tube. This difference causes the MIH of this reservoir to be nearly twice as large as compared to the alternative design. However, a substantial improvement of these performance criteria can be expected by a local geometry modification. Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-29070 SN - 1525-1594 VL - 44 IS - 4 SP - 411 EP - 418 PB - Wiley ER - TY - JOUR A1 - Strucks, Peter A1 - Watermann, Clara A1 - Weber, Konradin A1 - Kaluza, Stefan T1 - Systematic Investigations of Vibrational and Fluid‐Mechanical Stability of Coated Monolithic Catalysts JF - Chemie Ingenieur Technik N2 - Heterogeneous catalysts usually consist of porous, inorganic materials. Especially in the mobile application, e.g., in exhaust gas catalysis as a part of the gas line of an engine, there are loads due to vibrations and high gas velocities. It can be assumed that physical stress will lead to a loss of the catalytically active coating. The present contribution describes experimental setups and methods for a systematic and reproducible investigation of the main influences to the mass loss due to vibrational and fluid‐mechanical stress caused by particle‐free gas flows. KW - Design of experiments KW - Extruded catalysts KW - Mechanical stability Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28930 SN - 1522-2640 VL - 93 IS - 5 SP - 1 EP - 6 PB - Wiley ER - TY - JOUR A1 - Deckert, Carsten A1 - Schomaker, Rahel M. T1 - Cultural tightness–looseness and national innovativeness: impacts of tolerance and diversity of opinion JF - Journal of Innovation and Entrepreneurship N2 - The links between innovativeness as a driver of economic performance, and the determinants of innovativeness have been investigated by management scholars and economists for decades, focusing mostly on “hard factors” as investment in research and development, or education. Focusing on a relatively neglected, but in times of globalization even more important aspect, the infuence of cultural characteristics on innovativeness, we apply diferent econometric models to test for links between cultural tightness and looseness on the one hand, and national innovativeness on the other hand. We fnd that cultural tightness—in the sense of homogenous and intolerant societies—has a negative link to national innovativeness, while cultural looseness—in the sense of tolerant and diverse societies—displays a positive link to national innovativeness. KW - DOAJ KW - DEAL KW - Innovation KW - Kultur KW - Toleranz KW - Diversity of opinion Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-36515 SN - 2192-5372 VL - 11 SP - 1 EP - 19 PB - Springer Nature ER - TY - JOUR A1 - Nyssen Guillén, Viola Isabel A1 - Deckert, Carsten T1 - Cultural influence on innovativeness - links between “The Culture Map” and the “Global Innovation Index” JF - International Journal of Corporate Social Responsibility KW - culture KW - culture dimensions KW - Innovativeness KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-29121 SN - 2366-0074 VL - 6 IS - 1 PB - Springer Nature ER - TY - JOUR A1 - Reich, Marius A1 - Gottschald, Jonas A1 - Riegebauer, Philipp A1 - Adam, Mario T1 - Predictive Control of District Heating System Using Multi-Stage Nonlinear Approximation with Selective Memory JF - Energies KW - BestHeatNet KW - DOAJ Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-33627 SN - 1996-1073 VL - 13 IS - 24 PB - MDPI ER - TY - JOUR A1 - Nolting, Lars A1 - Spiegel, Thomas A1 - Reich, Marius A1 - Adam, Mario A1 - Praktiknjo, Aaron T1 - Can energy system modeling benefit from artificial neural networks? Application of two-stage metamodels to reduce computation of security of supply assessments JF - Computers & Industrial Engineering KW - KIVi Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-26979 SN - 0360-8352 VL - 142 PB - Elsevier ER - TY - JOUR A1 - Spiegel, Thomas T1 - Impact of Renewable Energy Expansion to the Balancing Energy Demand of Differential Balancing Groups JF - Journal of Sustainable Development of Energy, Water and Environment Systems N2 - The research addresses the present situation on the German electricity market caused by variable renewable energy sources. The increasing number of households with photovoltaic and battery storage systems and their impacts require special attention. These systems change the traditional electricity customer from the sole electricity consumer to an electricity producer and consumer in one person. These so-called prosumers differ in their actual electricity demand from the initially estimated electricity demand with standard load profile. This discrepancy results in deviations within a differential balancing group. Thereby, the main finding of this research is a significant higher balancing energy demand with the expansion of photovoltaic and battery storage systems. Hence, the standard load profile is particularly not suitable for differential balancing groups with a high penetration of solar systems and still less suitable for groups with solar and battery storage systems KW - Balance responsible party KW - Balancing energy KW - Differential balancing group KW - Electricity schedule registration KW - peer KW - Photovoltaic and battery storage systems KW - Prosumer KW - Standard load profile Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-29207 SN - 1848-9257 VL - 6 IS - 4 SP - 784 EP - 799 PB - SDEWES ER - TY - CHAP A1 - Gottschald, Jonas A1 - Adam, Mario A1 - Reich, Marius T1 - Multi-Objective Optimization of a District Heating Networks Energy Supply Systems Structure and Dimension T2 - SDH - 5th International Solar District Heating Conference, 11.-12.04.2018, Graz / Austria KW - Fast-Energy-Design Y1 - 2018 UR - https://www.researchgate.net/publication/325896757_Robust_Optimization_of_District_Heating_Networks_Structure_and_Dimension_combining_Metamodels_and_Multi-Objective_Optimization CY - Graz ER - TY - CHAP A1 - Backes, Klaus A1 - Adam, Mario A1 - Wirth, Hans Peter A1 - Götzelmann, Dennis A1 - Helbig, Sonja A1 - Eggert, Daniel ED - Häberle, Andreas T1 - Efficient Design of Solar Assisted Heating Systems for Multi-Family Houses T2 - Proceedings of EuroSun 2018, 12th International Conference on Solar Energy for Buildings and Industry, 10.-13.09.2018, Rapperswil / Switzerland, International Solar Energy Society KW - SUW-MFH Y1 - 2018 SN - 978-3-9820408-0-6 U6 - https://doi.org/10.18086/eurosun2018.01.02​ SP - 1 EP - 9 PB - International Solar Energy Society CY - Freiburg ER - TY - CHAP A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Reich, Marius A1 - Götzelmann, Dennis T1 - BestHeatNet – Selbstlernende Betriebsoptimierung einer hybriden Nahwärmeversorgung T2 - Der Geothermiekongress, 19.-21.11.2019, München KW - BestHeatNet Y1 - 2019 UR - https://www.der-geothermiekongress.de/fileadmin/user_upload/DGK/DGK_2019/Teilnahme/P12_Gottschald_BestHeatNet-124.pdf CY - München ER - TY - CHAP A1 - Gottschald, Jonas A1 - Reich, Marius A1 - Adam, Mario ED - Hochschule Nordhausen, T1 - Multikriterielle Auslegung der Energieversorgung eines Nahwärmenetzes T2 - RET.Con 2018: Tagungsband : 1. Regenerative Energietechnik-Konferenz in Nordhausen 8.-9. Februar 2018 KW - Fast-Energy-Design Y1 - 2018 UR - https://www.db-thueringen.de/receive/dbt_mods_00045831 SP - 141 EP - 148 PB - Hochschule Nordhausen CY - Nordhausen ER - TY - CHAP A1 - Biedermann, Till M. A1 - Reich, Marius A1 - Kameier, Frank A1 - Adam, Mario A1 - Paschereit, C. T1 - Assessment of Statistical Sampling Methods and Approximation Models Applied to Aeroacoustic and Vibroacoustic Problem T2 - NOVEM - 6th conference on Noise and Vibration emerging methods, 07.-09.05.2018, Ibiza / Spain Y1 - 2018 CY - Ibiza ER - TY - CHAP A1 - Gottschald, Jonas A1 - Reich, Marius A1 - Adam, Mario A1 - Leibauer, R. T1 - Selbstlernende Betriebsoptimierung einer hybriden Nahwärmeversorgung T2 - Fachkonferenz Digitalisieren - Sektoren koppeln - Flexibilisieren, 24.11.2020, Berlin KW - BestHeatNet Y1 - 2020 CY - Berlin ER - TY - JOUR A1 - Glembin, Jens A1 - Adam, Mario A1 - Deidert, Jörn A1 - Jagnow, Kati A1 - Rockendorf, Gunter A1 - Wirth, Hans Peter T1 - Simulation and Evaluation of Different Boiler Implementations and Configurations in Solar Thermal Combi Systems JF - Energy Procedia KW - Kessel und große Solarthermieanlagen Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27350 N1 - Acknowledgements The work presented in this paper has been realized within the project “Integration von Heizkesseln in Wärmeverbundsysteme mit großen Solaranlagen“ (Integration of heating boilers in thermal energy distribution circuits with large solar systems), which has been funded by the German Ministry for Environment, Nature Conservation and Nu-clear Safety based on a decision of the German Federal Parliament (FKZ 0325958Z). Within the project, the authors developed a new boiler model for dynamic simulations and validated it against test rig and field data. Field measurements and additional system simulations have been used to analyze and evaluate the interaction of the solar thermal system and the boiler. The authors are grateful for the project support. The content of this publication is in the responsibility of the authors. VL - 30 SP - 601 EP - 610 PB - Elsevier ER - TY - JOUR A1 - Ebling, Dirk A1 - Krumm, A. A1 - Pfeiffelmann, Björn A1 - Gottschald, J. A1 - Bruchmann, J. A1 - Benim, Ali Cemal A1 - Adam, Mario A1 - Labs, R. A1 - Herbertz, R. R. A1 - Stunz, A. T1 - Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes JF - Journal of Electronic Materials KW - heat recovery KW - Thermoelectric generation KW - thermoelectric generation system KW - waste heat KW - EnerTEG Y1 - 2016 U6 - https://doi.org/10.1007/s11664-016-4511-8 N1 - The authors acknowledge financial support from the Ministry of Economic Affairs and Energy of the State of North Rhine-Westphalia, Germany and the European Commission from the European Regional Development Fund. VL - 45 IS - 7 SP - 3433 EP - 3439 PB - Springer ER - TY - CHAP A1 - Reich, Marius A1 - Adam, Mario A1 - Gottschald, Jonas T1 - Robust Optimization of District Heating Networks Structure and Dimension combining Metamodels and Multi-Objective Optimization T2 - ECOS - 31th International Conference on Efficiency, Cost, Optimization, Simulation and Enviromental Impact of Energy Systems, 17.-21.06.2018, Guimaraes / Portugal KW - EnergyExpert Y1 - 2018 UR - https://www.researchgate.net/publication/325896757_Robust_Optimization_of_District_Heating_Networks_Structure_and_Dimension_combining_Metamodels_and_Multi-Objective_Optimization CY - Guimaraes ER - TY - CHAP A1 - Ille, Fabian A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Wirth, Hans Peter T1 - Analysis of Ageing Phenomena for Big Solar Thermal Plants T2 - ECOS - 31th International Conference on Efficiency, Cost, Optimization, Simulation and Enviromental Impact of Energy Systems, 17.-21.06.2018, Guimaraes / Portugal KW - ST2000-LangEff Y1 - 2018 UR - https://www.researchgate.net/publication/326147054_Analysis_of_Ageing_Phenomena_for_Big_Solar_Thermal_Plants CY - Guimaraes ER - TY - CHAP A1 - Nolting, Lars A1 - Spiegel, Thomas A1 - Reich, Marius A1 - Adam, Mario A1 - Praktiknjo, Aaron T1 - Can Energy System Modeling benefit from Artificial Neural Networks? Application of Two-Stage Metamodels to Reduce Computation of Security of Supply Assessments (Best Application Paper Award) T2 - CIE – 48th International Conference on Computers & Industrial Engineering, 02.-05.12.2018, Auckland / New Zealand KW - KIVi Y1 - 2018 CY - Auckland ER - TY - CHAP A1 - Goebel, J. A1 - Kowalski, M. A1 - Frank, Lena A1 - Adam, Mario ED - Deutscher Kälte- und Klimatechnischer Verein, T1 - Hardware in the Loop Test eines optimiertem Winter- und Sommerbetriebs einer Abwasser-Gaswärmepumpe/-Kältemaschiene T2 - Deutsche Kaelte-und Klimatagung 2017 Bremen KW - Abwasser-Gas-WP/KM Y1 - 2017 SN - 978-1-5108-5823-7 SP - 1085 EP - 1097 PB - Curran Associates, Inc. CY - Red Hook ER - TY - CHAP A1 - Goebel, Johannes A1 - Frank, Lena A1 - Zielke, Thomas A1 - Becker, Martin A1 - Lippel, Jens ED - Deutscher Kälte- und Klimatechnischer Verein, T1 - Modellierung dynamischer Prozesse mit Deep Neural Networks am Beispiel einer Gas-Absorptionswärmepumpe T2 - Deutsche Kaelte-und Klimatagung 2017 Bremen KW - Abwasser-Gas-WP/KM KW - ZIES Y1 - 2017 SP - 1147 EP - 1160 PB - Curran Associates, Inc. CY - Red Hook ER - TY - CHAP A1 - Goebel, J. A1 - Kowalski, M. A1 - Adam, Mario ED - Holzhauer, Ralf ED - Obergassel, Cordula ED - Rehorek, Astrid T1 - Abwasser als Wärmequelle und -senke für Wärmepumpen - Auswahl von Typtagen für Test und Dimensionierung mit Hilfe von Cluster-Verfahren T2 - Ressourcen-Wissen: Hebung Ungenutzter Potenziale KW - Abwasser-Gas-WP/KM Y1 - 2017 SN - 9783981902808 PB - Graduierteninstitut NRW CY - Bochum ER - TY - CHAP A1 - Helbig, Sonja A1 - Eggert, Daniel A1 - Adam, Mario T1 - Einfluss von Speicheranschlusshöhen und geschichteter Speicherbe- und -entladung auf die Effizienz solarer Kombisysteme im Mehrfamilienhaus T2 - Symposium Thermische Solarenergie – Energiewende Wärme, 13.-15.06.2018, Bad Staffelstein KW - SUW-MFH Y1 - 2018 CY - Bad Staffelstein ER - TY - CHAP A1 - Spiegel, Thomas A1 - Backes, K. A1 - Adam, Mario A1 - Helbig, Sonja A1 - Eggert, Daniel T1 - Best-Practice-Lösungen für Mehrfamilienhäuser mit Solaranlage T2 - Symposium Thermische Solarenergie – Energiewende Wärme, 13.-15.06.2018, Bad Staffelstein KW - SUW-MFH Y1 - 2018 CY - Bad Staffelstein ER - TY - CHAP A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Ille, Fabian A1 - Wirth, Hans Peter T1 - Bestandsaufnahme von solarthermischen Großanlagen aus den Förderprogrammen Solarthermie-2000 und Solarthermie2000plus T2 - 26. Symposium Thermische Solarenergie 2016, 20.-22.04.2016, Bad Staffelstein KW - ST2000-LangEff Y1 - 2016 UR - http://docplayer.org/78153296-Bestandsaufnahme-von-solarthermischen-grossanlagen-aus-den-foerderprogrammen-solarthermie-2000-und-solarthermie2000plus.html CY - Bad Staffelstein ER - TY - CHAP A1 - Wirth, Hans Peter A1 - Adam, Mario A1 - Ille, Fabian A1 - Gottschald, Jonas ED - Ostbayerisches Technologie-Transfer-Institut e. V., T1 - Monitoring von solarthermischen Großanlagen aus den Monitoring von solarthermischen Großanlagen aus den FörderprogrammenSolarthermie-2000 und Solarthermie2000plus. Posterpräsentation T2 - 27. OTTI Symposium Thermische Solarenergie; Energiewende: Wärme, 10.-12.05.2017, Bad Staffelstein KW - ST2000-LangEff Y1 - 2017 ER - TY - CHAP A1 - Helbig, Sonja A1 - Mercker, Oliver A1 - Steinweg, J. A1 - Eggert, Daniel A1 - Herz, M. A1 - Adam, Mario ED - Ostbayerisches Technologie-Transfer-Institut e. V., T1 - Gesamtsystembewertung von solarunterstützten Wärmeversorgungskonzepten in Mehrfamilienhäusern - Effizienz gegenüber Wirtschaftlichkeit T2 - 27. OTTI Symposium Thermische Solarenergie; Energiewende: Wärme, 10.-12.05.2017, Bad Staffelstein KW - SUW-MFH Y1 - 2017 ER - TY - CHAP A1 - Reich, Marius A1 - Adam, Mario A1 - Lambach, Stefan T1 - Comparison of different Methods for Approximating Models of Energy Supply Systems and Polyoptimising the Systems-Structure and Components-Dimension T2 - 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2017), San Diego, California, USA, 2-6 July 2017 KW - Fast-Energy-Design Y1 - 2018 SN - 9781510862562 SP - 2921 EP - 2933 PB - Curran Associates Inc CY - Red Hook, NY ER - TY - CHAP A1 - Adam, Mario A1 - Ille, Fabian A1 - Radosavljevic, Radojka A1 - Wirth, Hans Peter T1 - PVT-Solarkollektoren - Marktanalyse und Etrags-/Betriebssimulationen von Gesamtsystemen mit Wärmepumpen. Posterpräsentation T2 - 25. OTTI Symposium Thermische Solarenergie, 6.-8.05.2015, Bad Staffelstein KW - PVT-Norm Y1 - 2015 CY - Bad Staffelstein ER - TY - CHAP A1 - Rödder, Maximilian A1 - Frank, Lena A1 - Kirschner, Daniel A1 - Neef, Matthias A1 - Adam, Mario ED - The International Centre for Sustainable Development of Energy, Water and Environment Systems, T1 - EnergiBUS4home – Sustainable energy resourcing in low-energy buildings T2 - 12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik KW - energiBUS4home Y1 - 2017 ER - TY - CHAP A1 - Adam, Mario A1 - Lohmann, Sandra T1 - Berechnungs- und Auslegungstool zur energieeffizienten Kühlung von Gebäuden (Coolplan). P5-28 T2 - EnOB-Symposium 2014: Energieinnovationen in Neubau und Sanierung: Neues aus der Forschung für mehr Energieeffizienz, Raumkomfort, Wirtschaftlichkeit und Nachhaltigkeit, 20.–21. März 2014, Essen, Zeche Zollverein KW - Coolplan Y1 - 2014 PB - Projektträger Jülich CY - Essen ER - TY - CHAP A1 - Spiegel, Thomas ED - The International Centre for Sustainable Development of Energy, Water and Environment Systems, T1 - Imbalance reduction of energy balancing groups as a means of renewable energy expansion - Optiosn for an active energy balancing group management T2 - 12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik Y1 - 2017 ER - TY - CHAP A1 - Backes, Klaus A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Faber, Christian A1 - Henneböhl, Fred. A1 - Lanz, Marco A1 - Anthrakidis, Anette T1 - KWKK-Anlagen im Feldtest: Verbesserung ihrer Regelung und Hydraulik T2 - Deutsche Kälte-Klima-Tagung 2011, 16.-18.11.2011, Aachen KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW - 2 Y1 - 2011 UR - https://zies.hs-duesseldorf.de/forschung-und-entwicklung/erneuerbare-energien/Projekte_e2/Documents/KWKK2.pdf CY - Aachen ER - TY - CHAP A1 - Adam, Mario A1 - Walter, D. A1 - Backes, Klaus A1 - Steinweg, Jan T1 - Classification of Hydraulic Designs and Hardware-in-the-loop-Tests of Solar Assisted Heating Systems for Multi-Family Houses T2 - 2016 International Energy and Sustainability Conference (IESC), 30.06.-1.07.2016, Cologne KW - SUW-MFH Y1 - 2016 UR - https://doi.org/10.1109/IESC.2016.7569494 U6 - https://doi.org/10.1109/IESC.2016.7569494 SP - 1 EP - 6 PB - IEEE CY - Köln ER - TY - CHAP A1 - Ille, Fabian A1 - Adam, Mario A1 - Wirth, Hans Peter A1 - Radosavljevic, Radojka T1 - Market and simulation analysis of PVT applications for the determination of new PVT test procedures T2 - Conference Proceedings EuroSun 2014, 16.-19.09.2014, Aix-les-Bains KW - PVT-Norm Y1 - 2014 UR - http://proceedings.ises.org/paper/eurosun2014/eurosun2014-0048-Ille.pdf SP - 1 EP - 10 ER - TY - CHAP A1 - Schramm, Sebastian A1 - Adam, Mario T1 - Speichereinbindung mit dynamischem Beladebereich im Vergleich zu anderen Speicherladekonzepten. Poster-Präsentation T2 - Gleisdorf SOLAR - 12. Internationale Konferenz für solares Heizen und Kühlen, 08.-10.06.2016, Gleisdorf/Austria KW - Solare-Prozesswärme-Standards Y1 - 2016 UR - https://www.aee-intec.at/0uploads/dateien1152.pdf SP - 433 EP - 441 ER - TY - CHAP A1 - Helbig, Sonja A1 - Steinweg, Jan A1 - Eggert, Daniel A1 - Adam, Mario ED - Martinez, Victor ED - Gonzales, Jose T1 - Performance Testing and Optimization of Solar Assisted Heating Systems for Multi Family Houses T2 - EuroSun 2016 - Proceedings 11th ISES EuroSun Conference, 11. -14.10.2016, Palma (Mallorca), Spain KW - SUW-MFH Y1 - 2016 SN - 978-3-9814659-6-9 U6 - https://doi.org/10.18086/eurosun.2016.04.13 SP - 1 EP - 10 ER - TY - CHAP A1 - Steinweg, Jan A1 - Eggert, Daniel A1 - Rockendorf, G. A1 - Backes, Klaus A1 - Adam, Mario ED - Ostbayerisches Technologie-Transfer-Institut e.V., T1 - Leistungsbewertung und Optimierung von solar unterstützten Wärmezentralen in Mehrfamilienhäusern. Posterpräsentation T2 - 26. Symposium Thermische Solarenergie 2016, 20.-22.04.2016, Bad Staffelstein KW - SUW-MFH Y1 - 2016 CY - Bad Staffelstein ER - TY - CHAP A1 - Glembin, J. A1 - Adam, Mario A1 - Deidert, J. A1 - Jagnow, K. A1 - Rockendorf, G. A1 - Wirth, Hans Peter T1 - Vergleichende Untersuchung von Kesseleinbindungen in solarthermischen Kombianlagen. Posterbeitrag T2 - 22. OTTI Symposium Thermische Solarenergie KW - Kessel und große Solarthermieanlagen Y1 - 2012 ER - TY - CHAP A1 - Goebel, Johannes A1 - Frank, Lena A1 - Adam, Mario T1 - Heizen und Kühlen mittels Abwasser-Gaswärmepumpen/-Kältemaschinen T2 - Deutsche Kälte- und Klimatagung 2015, 18.-20.11.2015, Dresden KW - Abwasser-Gas-WP/KM Y1 - 2016 SN - 978-1-5108-1998-6 N1 - Inhaltsverzeichnis: https://www.proceedings.com/content/029/029687webtoc.pdf SP - 1190 EP - 1202 ER - TY - CHAP A1 - Backes, Klaus A1 - Ille, Fabian A1 - Adam, Mario T1 - Klassifizierung und Laborfeldtests solar unterstützter Wärmezentralen in Mehrfamilienhäusern. Posterpräsentation T2 - 26. Symposium Thermische Solarenergie 2016, 20.-22.04.2016, Bad Staffelstein KW - SUW-MFH Y1 - 2016 ER - TY - CHAP A1 - Anthrakidis, Anette A1 - Faber, Christian A1 - Krokerm M, A1 - Lanz, Marco A1 - Backes, Klaus A1 - Adam, Mario A1 - Dreher, Martina A1 - Schramm, Sebastian T1 - Solare Prozesswärmestandards - Konzeptionierung, Aufbau und wissenschaftliche Begleitung einer Pilotanlage T2 - 20. OTTI Symposium Thermische Solarenergie, 05.-07.05.2010, Bad Staffelstein KW - Solare-Prozesswärme-Standards Y1 - 2010 CY - Bad Staffelstein ER - TY - CHAP A1 - Ille, Fabian A1 - Adam, Mario A1 - Schramm, Sebastian A1 - Backes, Klaus A1 - Faber, Christian A1 - Anthrakidis, Anette T1 - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW mit periodisch arbeitender Sorptionsmaschine T2 - Deutsche Kälte-Klima-Tagung 2008, 20.-21.11.2008, Ulm KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW Y1 - 2008 CY - Ulm ER - TY - CHAP A1 - Backes, Klaus A1 - Faber, Christian A1 - Anthrakidis, Anette A1 - Ille, Fabian A1 - Adam, Mario A1 - Schramm, Sebastian T1 - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW mit periodisch arbeitender Sorptionsmaschine T2 - World Sustainable Energy Days 2008, 5-7. März, Wels KW - Solare-Prozesswärme-Standards Y1 - 2008 CY - Wels ER - TY - CHAP A1 - Backes, Klaus A1 - Faber, Christian A1 - Anthrakidis, Anette A1 - Ille, Fabian A1 - Adam, Mario A1 - Schramm, Sebastian ED - WREN, T1 - A small scale Combined Cooling, Heating and Power System T2 - World Renewable Energy Congress X and Exhibition, 19-25.07.2008, Glasgow KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW Y1 - 2008 CY - Glasgow ER - TY - CHAP A1 - Lohmann, Sandra A1 - Ille, Fabian A1 - Adam, Mario T1 - Solar cooling in a hardware-in-the-loop test and pilot plant. Postersession A1 T2 - 5th International Conference Solar Air-Conditioning, 25.-27.09.2013, Bad Krozingen KW - Solare Kühlung Y1 - 2013 SN - 978-3-943891-21-8 ER - TY - CHAP A1 - Lohmann, Sandra A1 - Thesing, M. A1 - Adam, Mario T1 - Solare Kühlung – Dynamische Rechnersimulationen und DoE-unterstützte Parametervariationen T2 - Deutsche Kälte-Klima-Tagung 2010, 17.-19.11.2010, Magdeburg KW - Solare Kühlung Y1 - 2010 SN - 978-1-61782-341-1 VL - 3 SP - 685 EP - 711 CY - Magdeburg ER - TY - CHAP A1 - Lohmann, Sandra A1 - Radosavljevic, Radojka A1 - Gottschald, Jonas A1 - Adam, Mario A1 - Goebel, Johannes T1 - Solare Kühlung im Hardware-in-the-Loop-Test T2 - Deutsche Kälte-Klima-Tagung 2012, 21.-23.11.2012, Würzburg KW - FBMV KW - Solare Kühlung KW - ZIES Y1 - 2012 ER - TY - CHAP A1 - Adam, Mario A1 - Dreher, Martina A1 - Schramm, Sebastian A1 - Anthrakidis, Anette A1 - Faber, Christian A1 - Lanz, Marco T1 - Solare-ProzesswärmeStandards. Poster Session T2 - World Sustainable Energy Days 2011, 2.-4. März, Wels KW - Solare-Prozesswärme-Standards KW - Poster Y1 - 2011 CY - Wels ER - TY - CHAP A1 - Schramm, Sebastian T1 - Hydraulische Einbindung von Speichern in Solare Prozesswärmesysteme: Posterbeitrag T2 - 22. OTTI Symposium Thermische Solarenergie KW - Solare-Prozesswärme-Standards Y1 - 2012 ER - TY - CHAP A1 - Schramm, Sebastian A1 - Adam, Mario A1 - Backes, Klaus A1 - Ille, Fabian A1 - Faber, Christian A1 - Anthrakidis, Anette T1 - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW mit periodisch arbeitender Sorptionsmaschine T2 - VDI-Tage der Gebäudetechnik 2008: Tagung Dortmund, 28.-29. Mai 2008 KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW Y1 - 2008 SN - 9783180920436 VL - VDI-Berichte, 2043 SP - 103 EP - 116 PB - VDI-Verl. CY - Düsseldorf ER - TY - GEN A1 - Lambach, Stefan A1 - Kowalski, M. A1 - Reich, Marius A1 - Adam, Mario T1 - Vermessung und Modellierung eines Komfort-Lüftungsgerätes mit passiver Wärmerückgewinnung und aktiver, umschaltbarer Luft/Luft-Wärmepumpe im Kühlbetrieb T2 - KI Kälte Luft Klimatechnik KW - Coolplan-AIR Y1 - 2020 SN - 1865-5432 VL - 56 IS - 10 SP - 48 EP - 55 PB - Hüthig ER - TY - GEN A1 - Gottschald, Jonas A1 - Leibauer, Rüdiger T1 - Energiezentrale mit Weitblick - Künstliche Intelligenz in der Quartiersversorgung T2 - emw - Energie. Markt. Wettbewerb KW - BestHeatNet Y1 - 2021 UR - https://www.emw-online.com/artikel/209237/energiezentrale-mit-weitblick SN - 1611-2997 VL - 1 IS - 1 PB - Energate ER - TY - GEN A1 - Wirth, Hans Peter A1 - Gottschald, Jonas A1 - Ille, Fabian A1 - Adam, Mario T1 - Monitoring von Solarthermieanlagen T2 - IKZ-Energy KW - ST2000-LangEff Y1 - 2018 UR - https://www.ikz.de/detail/news/detail/monitoring-von-solarthermischen-grossanlagen/ VL - 41 IS - 1/2 SP - 8 EP - 11 PB - STROBEL VERLAG ER - TY - GEN A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heizung, Lüftung, Weiße Ware – Ein integriertes Systemkonzept für das Haus der Zukunft T2 - KKA – Kälte Klima Aktuell KW - energiBUS4home Y1 - 2018 SN - 0722-4605 VL - 37 IS - 4 SP - 42 EP - 47 PB - Bauverl. BV ER - TY - GEN A1 - Lambach, Stefan A1 - Lohmann, Sandra A1 - Adam, Mario T1 - Jahres-Energieeffizienz von Kühlgeräten zur Klimatisierung – Vergleich von Normberechnung und Jahressimulationen, T2 - KI Kälte Luft Klimatechnik KW - Coolplan-AIR Y1 - 2018 VL - 54 IS - 5 SP - 50 EP - 55 PB - Hüthig ER - TY - GEN A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - energiBUS4home – Integration von Haushaltsgeräten in ein multifunktionales Wärmepumpensystem T2 - KI Kälte Luft Klimatechnik KW - energiBUS4home Y1 - 2020 SN - 1865-5432 VL - 56 IS - 8/9 SP - 41 EP - 45 PB - Hüthig ER - TY - GEN A1 - Adam, Mario A1 - Gottschald, Jonas T1 - Kempen wird zum Reallabor T2 - Stadt + Werk: Energiepolitik, Klimaschutz, Rekommunalisierung KW - BestHeatNet Y1 - 2019 SN - 2193-195X VL - 9 IS - 7/8 SP - 22 EP - 23 PB - K21 Media AG ER - TY - GEN A1 - de Carvalho, Raphael A1 - Heinze, Robert A1 - Ille, Fabian A1 - Adam, Mario A1 - Kameier, Frank A1 - Schauenberg, Udo T1 - Verbesserte energetische Prognose von air conomy Modulen. Vergleich zwischen Design of Experiments (DoE) und Dimensionsanalyse (Teil 1) T2 - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik Y1 - 2012 VL - 63 IS - 8 SP - 24 EP - 28 PB - Springer VDI-Verlag ER - TY - GEN A1 - Adam, Mario A1 - Lohmann, Sandra T1 - Vermessung der Yazaki-Absorptionskältemaschine WFC-SC5 T2 - KI Kälte - Luft - Klimatechnik KW - Solare Kühlung Y1 - 2014 UR - https://www.ki-portal.de/wp-content/uploads/2014/02/KI_2014_01-02_Wissenschaft_Lohmann.pdf SN - 1865-5432 VL - 50 IS - 1/2 SP - 26 EP - 30 PB - Hüthig ER - TY - GEN A1 - Kowalski, M. A1 - Adam, Mario A1 - Backes, Klaus T1 - Vermessung der SorTech-Adsorptionskältemaschine ACS 08 T2 - KI Kälte - Luft - Klimatechnik KW - Coolplan Y1 - 2015 UR - https://www.ki-portal.de/wp-content/uploads/2015/10/KI_2015_08-09_Wissenschaft_Adam.pdf SN - 1865-5432 VL - 51 IS - 10 SP - 26 EP - 30 PB - Hüthig ER - TY - GEN A1 - Backes, Klaus A1 - Adam, Mario A1 - Gottschald, Jonas T1 - KWKK-Anlagen im Feldtest. Optimaler Betrieb durch Verbesserungen bei Regelung und Hydraulik T2 - KK Die Kälte + Klimatechnik KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW - 2 Y1 - 2012 SN - 0343-2246 VL - 65 IS - 3 SP - 20 EP - 27 PB - Alfons W. Gentner Verlag ER - TY - GEN A1 - Wirth, Hans Peter A1 - Gottschald, Jonas A1 - Ille, Fabian A1 - Adam, Mario T1 - Wärme: Zuverlässige Kollektoren liefern hohe Solarerträge: Monitoring von Solarthermieanlagen T2 - Sonne, Wind & Wärme KW - ST2000-LangEff Y1 - 2017 UR - 1861-2741 VL - 41 IS - 4 SP - 81 EP - 83 PB - VDE Verlag ER - TY - GEN A1 - Gottschald, Jonas A1 - Adam, Mario A1 - Marx, H. T1 - Heiztechnik - Langzeitmessergebnisse eines vakuumisolierten Warmwasserspeichers T2 - HLH Heizung – Lüftung – Haustechnik KW - VakuTank Y1 - 2014 SN - 0017-9906 VL - 64 IS - 4 SP - 20 EP - 25 PB - VDI-Verlag ER - TY - GEN A1 - Backes, Klaus A1 - Adam, Mario T1 - KWKK-Anlagen im Feldtest (Teil 1) T2 - SHT Sanitär + Heizungstechnik KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW Y1 - 2012 SN - 0036-4401 VL - 77 IS - 3 SP - 40 EP - 44 PB - Krammer ER - TY - GEN A1 - Backes, Klaus A1 - Adam, Mario T1 - KWKK-Anlagen im Feldtest (Teil 2) T2 - SHT Sanitär + Heizungstechnik KW - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich von 10 kW Y1 - 2012 SN - 0036-4401 VL - 77 IS - 4 SP - 50 EP - 53 PB - Kramer ER - TY - GEN A1 - de Carvalho, Raphael A1 - Heinze, Robert A1 - Ille, Fabian A1 - Adam, Mario A1 - Kameier, Frank A1 - Schauenberg, Udo T1 - Verbesserte energetische Prognose von air conomy Modulen. Vergleich zwischen Design of Experiments (DoE) und Dimensionsanalyse (Teil 2) T2 - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik Y1 - 2012 VL - 63 IS - 9 SP - 32 EP - 36 PB - Springer VDI-Verlag ER - TY - GEN A1 - Adam, Mario A1 - Lohmann, Sandra T1 - Solare Kühlung – Dynamische Rechnersimulationen und Parametervariationen T2 - KI Kälte - Luft - Klimatechnik KW - Solare Kühlung Y1 - 2011 SN - 1865-5432 VL - 47 IS - 5 SP - 22 EP - 26 PB - Hüthig ER - TY - CHAP A1 - Deckert, Carsten A1 - Chandra, Tanja A1 - Mohya, Ahmed A1 - Schmidt, Gerrit A1 - Schönheit, Matthias ED - Deckert, Carsten T1 - Unterirdischer Warentransport in urbanen Ballungsräumen T2 - CSR und Logistik Y1 - 2021 SN - 978-3-662-63569-8 U6 - https://doi.org/10.1007/978-3-662-63570-4_14 VL - Management-Reihe Corporate Social Responsibility SP - 283 EP - 305 PB - Gabler Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - Deckert, Carsten A1 - Godau, Daniel A1 - Kretschmar, Dominik A1 - Rudolph, Vincent ED - Deckert, Carsten T1 - Komparative Analyse der Nachhaltigkeitsberichte in der deutschen Logistikbranche T2 - CSR und Logistik Y1 - 2021 SN - 978-3-662-63569-8 U6 - https://doi.org/10.1007/978-3-662-63570-4_2 VL - Management-Reihe Corporate Social Responsibility SP - 45 EP - 62 PB - Gabler Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - Deckert, Carsten A1 - Stodick, Klaus A1 - Hertz-Eichenrode, David ED - Deckert, Carsten T1 - Nachhaltige Paketauslieferung mit Mikro-Depots T2 - CSR und Logistik Y1 - 2021 SN - 978-3-662-63569-8 U6 - https://doi.org/10.1007/978-3-662-63570-4_13 VL - Management-Reihe Corporate Social Responsibility SP - 271 EP - 282 PB - Gabler Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - CHAP A1 - Deckert, Carsten A1 - Mohya, Ahmed A1 - Suntharalingam, Sujieban T1 - VIRTUAL WHITEBOARDS DIGITAL POST-ITS - INCORPORATING INTERNET-BASED TOOLS FOR IDEATION INTO ENGINEERING COURSES T2 - SEFI 2021: 49th ANNUAL CONFERENCE BERLIN, 13.09.-16.09.2021 Y1 - 2021 SP - 1370 EP - 1375 ER - TY - CHAP A1 - Deckert, Carsten A1 - Schomaker, Rahel A1 - Knappitsch, Eithne ED - Poznańska, Krystyna ED - Szczepańska-Woszczyna, Katarzyna ED - Michałek, Janusz T1 - Cultural Impacts on National Innovativeness and Entrepreneurship T2 - Innovation and entrepreneurship : theory and practice Y1 - 2022 SN - 9788366794306 SP - 57 EP - 84 PB - WSB University CY - Dąbrowa Górnicza ER - TY - JOUR A1 - Deckert, Carsten A1 - Niemann, Jörg T1 - Management des Innovationsportfolios: Portfolio-Matrizen zumManagement von Innovationsprojekten JF - WiSt - Wirtschaftswissenschaftliches Studium Y1 - 2021 U6 - https://doi.org/10.15358/0340-1650-2021-11-59 VL - 50 IS - 11 SP - 59 EP - 64 PB - Beck ER - TY - CHAP A1 - Deckert, Carsten A1 - Görs, Nadine A1 - Mäckel, Frederic ED - Deckert, Carsten T1 - Carbon Footprint in der Transportbranche T2 - CSR und Logistik Y1 - 2021 SN - 978-3-662-63569-8 U6 - https://doi.org/10.1007/978-3-662-63570-4_5 VL - Management-Reihe Corporate Social Responsibility SP - 103 EP - 121 PB - Gabler Springer CY - Berlin, Heidelberg ET - 2., überarb. Aufl. ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Water-Cooled Thermoelectric Generators for Improved Net Output Power: A Review JF - Energies N2 - Thermoelectric generators (TEGs) have the ability to convert waste heat into electrical energy under unfavorable conditions and are becoming increasingly popular in academia, but have not yet achieved a broad commercial success, due to the still comparably low efficiency. To increase the efficiency and economic viability of TEGs, research is performed on the materials on one hand and on the system connection on the other. In the latter case, the net output power of the cooling system plays a key role. At first glance, passive cooling seems preferable to active cooling because it does not affect the net electrical output power. However, as shown in the present review, the active cooling is to be preferred for net output power. The situation is similar in air and water-cooling. Even though air-cooling is easier to set up, the water-cooling should be preferred to achieve higher net output power. It is shown that microchannel cooling has similar hydraulic performance to conventional cooling and inserts increase the net output power of TEG. As the review reveals that active water-cooling should be the method of choice to achieve high net output power, it also shows that a careful optimization is necessary to exploit the potential. KW - Energy Engineering and Power Technology KW - Renewable Energy, Sustainability and the Environment KW - Electrical and Electronic Engineering KW - Control and Optimization KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37323 SN - 1996-1073 VL - 14 IS - 24 PB - MDPI ER - TY - JOUR A1 - Benim, Ali Cemal T1 - Numerical Calculation of Sink Velocities for Helminth Eggs in Water JF - Computation N2 - The settling velocities of helminth eggs of three types, namely Ascaris suum (ASC), Trichuris suis (TRI), and Oesophagostomum spp. (OES), in clean tap water are computationally determined by means of computational fluid dynamics, using the general-purpose CFD software ANSYS Fluent 18.0. The previous measurements of other authors are taken as the basis for the problem formulation and validation, whereby the latter is performed by comparing the predicted sink velocities with those measured in an Owen tube. To enable a computational treatment, the measured shapes of the eggs are parametrized by idealizing them in terms of elementary geometric forms. As the egg shapes show a variation within each class, “mean” shapes are considered. The sink velocities are obtained through the computationally obtained drag coefficients. The latter are defined by means of steady-state calculations. Predicted sink velocities are compared with the measured ones. It is observed that the calculated values show a better agreement with the measurements, for ASC and TRI, compared to the theoretical sink values delivered by the Stokes theory. However, the observed agreement is still found not to be very satisfactory, indicating the role of further parameters, such as the uncertainties in the characterization of egg shapes or flocculation effects even in clean tap water. KW - Applied Mathematics KW - Modeling and Simulation KW - General Computer Science KW - Theoretical Computer Science KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37318 SN - 2079-3197 VL - 9 IS - 12 PB - MDPI ER - TY - JOUR A1 - Senthur, N.S. A1 - Anand, C A1 - Ramesh Kumar, M A1 - Elumalai, P.V. A1 - Shajahan, Mohamed Iqbal A1 - Benim, Ali Cemal A1 - Nasr, Emad Abouel A1 - Hussein, H.M.A. A1 - Parthasarathy, M. T1 - Influence of cobalt chromium nanoparticles in homogeneous charge compression ignition engine operated with citronella oil JF - Energy Science & Engineering KW - General Energy KW - Safety, Risk, Reliability and Quality KW - DOAJ Y1 - 2022 U6 - https://doi.org/10.1002/ese3.1088 SN - 2050-0505 VL - 10 IS - 4 SP - 1251 EP - 1263 PB - Wiley ER - TY - CHAP A1 - Deckert, Carsten A1 - Kalefeld, Jannik A1 - Kutz, Martin ED - Kumar, Vikas ED - Leng, Jiewu ED - Akberdina, Victoria ED - Kuzmin, Evgeny T1 - Business Model Innovation for the Internet of Things T2 - Lecture Notes in Information Systems and Organisation: Digital Twins and New Business Models Y1 - 2022 SN - 978-3-030-94617-3 U6 - https://doi.org/10.1007/978-3-030-94617-3_23 SN - 2195-4968 VL - LNISO,volume 54 SP - 321 EP - 333 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Neef, Matthias A1 - Sulda, Erik A1 - Sürken, Norbert A1 - Walkenhorst, Jan T1 - Design Features and Performance Details of Brush Seals for Turbine Applications T2 - Proceedings of the ASME Turbo Expo 2006 : presented at the 2006 ASME Turbo Expo, May 6 - 11, 2006, Barcelona, Spain N2 - Adaptive and contacting seals such as brush seals have been successfully applied to turbomachinery for several years. In large steam turbine applications, however, various challenges still persist. Special focus is directed at the long-term performance and longevity of brushes on conventional spring-backed seal segments in steam turbines. This issue is particularly related to wear during startup conditions. This paper discusses the results of wear tests, derived from simulated transient turbine behavior, where the resultant seal leakage under steady state conditions is monitored. It is shown that the brush seal is significantly capable of adapting to varying operating conditions, but exhibits a degree of performance degradation during the initial startups. Together with previously reported mid-term wear data and an experience based long-term phenomenological approach a general model for brush seal performance degradation is developed. This model can be used for performance prediction and exerts influence on brush seal design. Y1 - 2006 SN - 0-7918-4238-X U6 - https://doi.org/10.1115/GT2006-90404 VL - 3 SP - 1385 EP - 1392 PB - ASME CY - New York ER - TY - RPRT A1 - Deckert, Carsten T1 - Innovation Scouting - Auf der Suche nach der radikalen Innovation T2 - CBS Working Paper Series N2 - Veränderte wirtschaftliche Rahmenbedingungen und die zunehmende Bedeutung von radikalen Innovationen und technologischen Diskontinuitäten führen dazu, dass mehr und mehr Unternehmen Scouting-Aktivitäten implementieren. Diese gehen über das klassische Innovationsmanagement hinaus. Im vorliegenden Beitrag werden Auswirkungen dieses Scouting Paradigmas diskutiert und ein Framework zu dessen Umsetzung entwickelt, das sowohl den Blick nach außen als auch nach innen richtet. External Innovation Scouting dient dazu, systematisch Technologien und Geschäftsideen als Innovationschancen für das Unternehmen zu ermitteln. Beim Internal Innovation Scouting geht es darum, die richtigen Rahmenbedingungen dafür zu schaffen, dass Mitarbeiter Innovationschancen aufgreifen und im Unternehmen radikale Innovationen marktreif entwickeln können. Außerdem stellt das Innovation Scouting neue Anforderungen an die Innovationsbewertung. Innovation Scouting ergänzt das bestehende Innovationsmanagement um eine langfristige Perspektive, die für das Überleben jenseits der Quartalsberichte von entscheidender Bedeutung sein kann. Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-18296 UR - https://www.researchgate.net/publication/271013459_Innovation_Scouting_-_Auf_der_Suche_nach_der_radikalen_Innovation VL - 2 PB - Cologne Business School CY - Köln ER - TY - CHAP A1 - Deckert, Carsten T1 - Why Some Ideas Refuse to Diffuse BT - 8th Annual Conference Front End of Innovation (FEI EMEA), Munich N2 - There is a popular saying in German: Innovation is when the market shouts “Hooray!”. Thus, a new idea is only as good as its diffusion into the addressed social system. The question is what affects the adoption or rejection of a new idea. Carsten Deckert shares his experience on the main innovation resistances and on ways to increase the acceptance of new ideas. He talks about which perceived attributes of innovations are conducive to the rate of adoption of an innovation and which are characteristics of failed innovations. Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-18193 PB - KNect 365 CY - München ER - TY - RPRT A1 - Deckert, Carsten T1 - Tensions in Creativity - Using the Value Square to Model Individual Creativity T2 - CBD Working Paper Series N2 - The definition of individual creativity is based on a tension between novelty on the one side and usefulness respectively appropriateness on the other side. The paper explores how this tension pervades the stage and componential theories of creativity. To achieve this, the so called value square (“Wertequadrat”) developed by Helwig (1967) and Schulz von Thun (1998)is used which balances a value with its countervalue to analyze creativity. The author identifies tensions of action and inaction, expertise and mindfulness, precision and ambiguity as well as immersion and detachment permeating the creative process and the components of creativity. As a conclusion a morphological box for creativity is presented which allows one to show which combination of characteristics of the tensions support different stages of creativity. Furthermore implications for development and time management are discussed. Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-18209 UR - https://www.researchgate.net/publication/282875608_Tensions_in_Creativity_-_Using_the_Value_Square_to_Model_Individual_Creativity VL - 2 PB - Cologne Business School CY - Köln ER - TY - RPRT A1 - Deckert, Carsten T1 - Tensions in Creative Products - Using the Value Square to Model Functional Creativity T2 - CBS Working Paper Series Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-18078 UR - https://www.researchgate.net/publication/305900610_Tensions_in_Creative_Products_-_Using_the_Value_Square_to_Model_Functional_Creativity VL - 4 PB - Cologne Business School CY - Köln ER - TY - CHAP A1 - Deckert, Carsten T1 - Tensions in Corporate Creativity T2 - Book of Papers N2 - The standard definition of creativity is based on a tension between originality and effectiveness. Borrowing from the wave-particle duality in physics one could say that there is an originality-effectiveness duality at work for creativity. The paper explores how this tension pervades Amabile's (1997) componential theory of organizational creativity with the components organizational motivation, management practices (including work assignment and work control) and resources. As a method the so called value square (" Wertequadrat ") developed by Helwig (1967) and Schulz von Thun (1998) is used which balances a value with its countervalue. The author identifies a tension of corporate tradition and corporate change for organizational motivation, a tension of skills and challenges for work assignment, a tension of management by control and management by loss of control for work control as well as a tension of organizational efficiency and organizational slack for resources. Additionally different implications of these tensions for the resistance of a company to creativity, for an organizational climate conducive to creativity as well as for resource allocation in creative endeavours are discussed. KW - Components of Creativity KW - Corporate Creativity KW - Organizational Creativity Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-18065 UR - https://www.researchgate.net/publication/313010955_TENSIONS_IN_CORPORATE_CREATIVITY SP - 79 EP - 86 ER - TY - JOUR A1 - Deckert, Carsten T1 - Ecological sustainability of material resources – Why material efficiency just isn’t enough JF - uwf UmweltWirtschaftsForum Y1 - 2016 U6 - https://doi.org/10.1007/s00550-016-0419-2 VL - 24 IS - 4 SP - 325 EP - 335 PB - Springer ER - TY - RPRT A1 - Deckert, Carsten T1 - Creative Heuristics: A Framework for Systematic Creative Problem Solving T2 - CBS Working Paper Series Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-17982 UR - https://www.researchgate.net/publication/318700662_Creative_Heuristics_A_Framework_for_Systematic_Creative_Problem_Solving VL - 1 PB - Cologne Business School CY - Köln ER - TY - JOUR A1 - Deckert, Carsten A1 - Görs, Nadine T1 - Transport carbon footprint in the german courier, express and parcel industry (CEP industry) JF - Sustainability Management Forum | NachhaltigkeitsManagementForum Y1 - 2019 U6 - https://doi.org/10.1007/s00550-018-0471-1 VL - 27 IS - 1 SP - 23 EP - 30 PB - Springer ER - TY - JOUR A1 - Benim, Ali Cemal T1 - Introducing the “Mathematical Modelling and Numerical Simulation of Combustion and Fire” Section of the Journal Fire JF - fire Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40257 SN - 2571-6255 VL - 5 IS - 6 PB - MDPI ER - TY - CHAP A1 - von Berg, Markus A1 - Schwörer, Paul A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - Analysis of physical and perceptual properties of room impulse responses: development of an online tool T2 - Forum Acusticuum 2023: 10th Convention of European Acoustics Association, Turin, Italy, 11th-15th September 2023 N2 - Over the past decades, research in room acoustics has established several derivative measures of an impulse response, some of which are incorporated in the ISO 3382 standards. These parameters intend to represent perceptual qualities, but were developed without a consistent modeling of room acoustical perception. More recent research proposed comprehensive inventories of room acoustic perception that are purely based on evaluations by human subjects, such as the Room Acoustical Quality Index (RAQI). In this work RA-QI scores acquired for 70 room impulse responses were predicted from room acoustical parameters. Except for Reverberance, the prediction of RAQI factors performed rather poor. In most cases, the sound source had a greater impact on RAQI scores. All analyses are published in an online tool, where users can upload omnidirectional and binaural impulse responses, and instantly obtain and visualize several physical descriptors, as well as predicted RAQI scores for three different sound sources. So far, acceptable prediction accuracy is achieved for Reverberance, Strength, Irregular Decay, Clarity and Intimacy. Larger data sets of evaluated impulse responses are required to improve the model performance and enable reliable predictions of room acoustical quality. Therefore, the administration of RAQI evaluations within the website is currently being developed. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41955 PB - EAA ER - TY - JOUR A1 - Brummel, Mattis A1 - Müller, Patrick A1 - Braun, Alexander T1 - Spatial precision and recall indices to assess the performance of instance segmentation algorithms JF - Electronic Imaging KW - Space-Variance KW - Computer Vision KW - IoU KW - image perturbations Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41552 SN - 2470-1173 VL - 34 IS - 16 SP - 1 EP - 6 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Ali, R. A1 - Farooq, A. A1 - Shahzad, A. A1 - Benim, Ali Cemal A1 - Iqbal, A. A1 - Razzaq, M. T1 - Computational approach on three-dimensional flow of couple-stress fluid with convective boundary conditions JF - Physica A: Statistical Mechanics and its Applications Y1 - 2022 U6 - https://doi.org/10.1016/j.physa.2019.124056 SN - 0378-4371 VL - 553 PB - Elsevier ER - TY - JOUR A1 - Queval, Loic A1 - Sotelo, Guilherme G. A1 - Kharmiz, Yassin A1 - Dias, Daniel H. N. A1 - Sass, Felipe A1 - Zermeno, Victor M. R. A1 - Gottkehaskamp, Raimund T1 - Optimization of the Superconducting Linear Magnetic Bearing of a Maglev Vehicle JF - IEEE Transactions on Applied Superconductivity KW - High temperature superconductors KW - linear magnetic bearing KW - maglev system KW - stochastic optimization KW - superconductor modeling Y1 - 2016 U6 - https://doi.org/10.1109/TASC.2016.2528989 SN - 1051-8223 VL - 26 IS - 3 PB - IEEE ER - TY - JOUR A1 - Mabrouk, Riheb A1 - Benim, Ali Cemal A1 - Naji, Hassane A1 - Dhahri, Hacen T1 - Investigation of Pulsed Flow Effects on the Phase Change Within an Open-Cell Metal Foam Using Thermal Lattice Boltzmann Method JF - Transport in Porous Media KW - Thermal lattice Boltzmann method KW - Energetic and exergetic efficiencies KW - Local thermal non-equilibrium KW - Solidification process KW - Melting KW - Porous media KW - Pulsating flow Y1 - 2023 U6 - https://doi.org/10.1007/s11242-023-01903-x SN - 0169-3913 VL - 147 IS - 2 SP - 225 EP - 257 PB - Springer Nature ER - TY - JOUR A1 - Queval, Loic A1 - Coty, Alain A1 - Vido, Lionel A1 - Gottkehaskamp, Raimund A1 - Multon, Bernard T1 - A Switched Reluctance Motor Drive Using Photovoltaic Transistors: Principle, Prototype, Experimental, and Numerical Results JF - IEEE Transactions on Industry Applications Y1 - 2017 U6 - https://doi.org/10.1109/TIA.2017.2718493 SN - 0093-9994 VL - 53 IS - 5 SP - 4886 EP - 4893 PB - IEEE ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Chattopadhyay, Himadri A1 - Benim, Ali Cemal T1 - Computational investigation of heat transfer enhancement by alternating inclined ribs in tubular heat exchanger JF - Progress in Computational Fluid Dynamics KW - CFD KW - forced convection KW - transitional turbulence KW - inclined ribs KW - heat transfer enhancement Y1 - 2017 U6 - https://doi.org/10.1504/PCFD.2017.088818 SN - 1468-4349 VL - 17 IS - 6 SP - 390 EP - 396 PB - Inderscience Enterprises Limited ER - TY - JOUR A1 - Farooq, Asma A1 - Ali, Ramzan A1 - Benim, Ali Cemal T1 - Soret and Dufour effects on three dimensional Oldroyd-B fluid JF - Physica A: Statistical Mechanics and its Applications Y1 - 2018 U6 - https://doi.org/10.1016/j.physa.2018.02.204 SN - 0378-4371 VL - 503 SP - 345 EP - 354 PB - Elsevier ER - TY - JOUR A1 - Biswas, Nirmalendu A1 - Mandal, Dipak Kumar A1 - Manna, Nirmal K. A1 - Benim, Ali Cemal T1 - Enhanced energy and mass transport dynamics in a thermo-magneto-bioconvective porous system containing oxytactic bacteria and nanoparticles: cleaner energy application JF - Energy Y1 - 2023 U6 - https://doi.org/10.1016/j.energy.2022.125775 SN - 0360-5442 VL - 263 IS - B PB - Elsevier ER - TY - JOUR A1 - Schwung, Dorothea A1 - Yuwono, Steve A1 - Schwung, Andreas A1 - Ding, Steven X. T1 - PLC-Informed Distributed Game Theoretic Learning of Energy-Optimal Production Policies JF - IEEE Transactions on Cybernetics Y1 - 2022 U6 - https://doi.org/10.1109/TCYB.2022.3179950 SN - 2168-2267 SP - 1 EP - 14 PB - IEEE ER - TY - JOUR A1 - Grote-Ramm, Wolfgang A1 - Lanuschny, David A1 - Lorenzen, Finn A1 - Brito, Marcel Oliveira A1 - Schoenig, Felix T1 - Continual learning for neural regression networks to cope with concept drift in industrial processes using convex optimisation JF - Engineering Applications of Artificial Intelligence Y1 - 2022 U6 - https://doi.org/10.1016/j.engappai.2023.105927 SN - 0952-1976 VL - 120 PB - Elsevier ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Benim, Ali Cemal A1 - Pathak, Manabendra A1 - Chamoli, Sunil A1 - Gupta, Ashutosh T1 - Thermohydraulic characteristics of inline and staggered angular cut baffle inserts in the turbulent flow regime JF - Journal of Thermal Analysis and Calorimetry Y1 - 2020 U6 - https://doi.org/10.1007/s10973-019-09094-8 SN - 1388-6150 VL - 140 IS - 3 SP - 1519 EP - 1536 PB - Springer Nature ER - TY - JOUR A1 - Laux, Christoph A1 - Gotter, Andreas A1 - Eckert, Frank A1 - Neef, Matthias T1 - Experimental results of a low-pressure steam Rankine cycle with a novel water lubricated radial inflow turbine for the waste heat utilization of internal combustion engines JF - Energy Conversion and Management Y1 - 2022 U6 - https://doi.org/10.1016/j.enconman.2022.116265 SN - 0196-8904 VL - 271 PB - Elsevier ER - TY - JOUR A1 - Nebel, Janine A1 - Schmidt, Stefan A1 - Pan, Qiushi A1 - Lotz, Katrin A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the role of cobalt carbidization in higher alcohol synthesis over hydrotalcite-based Co-Cu catalysts JF - Chinese Journal of Catalysis Y1 - 2019 U6 - https://doi.org/10.1016/S1872-2067(19)63344-9 SN - 1872-2067 N1 - The research project is funded by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF, Verbundvorhaben Carbon2Chem®, FKZ: 03EK3041). VL - 40 IS - 11 SP - 1731 EP - 1740 PB - Elsevier ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Göbel, Christoph A1 - Gabrysch, Thomas A1 - Song, Huiqing A1 - Froese, Christian A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - CO Hydrogenation to Higher Alcohols over Cu–Co-Based Catalysts Derived from Hydrotalcite-Type Precursors JF - Topics in Catalysis Y1 - 2016 UR - https://doi.org/10.1007/s11244-016-0663-2 U6 - https://doi.org/10.1007/s11244-016-0663-2 VL - 59 IS - 15-16 SP - 1361 EP - 1370 PB - Springer Nature ER - TY - CHAP A1 - Langmann, Reinhard A1 - Stiller, Michael ED - Auer, Michel E. ED - Zutin, Danilo G. T1 - Cloud-based industrial control services - The next generation PLC? T2 - Online Engineering & Internet of Things: Proceedings of the 14th International Conference on Remote Engineering and Virtual Instrumentation REV 2017, held 15–17 March 2017, Columbia University, New York, USA Y1 - 2017 SN - 978-3-319-64351-9 U6 - https://doi.org/10.1007/978-3-319-64352-6_1 SN - 2190-4111 VL - Lecture Notes in Networks and Systems : 22 SP - 3 EP - 18 PB - Springer Nature CY - Cham ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Benim, Ali Cemal A1 - Chattopadhyay, Himadri A1 - Banerjee, Arnab T1 - Experimental investigation of heat transfer performance of corrugated tube with spring tape inserts JF - Experimental Heat Transfer Y1 - 2019 U6 - https://doi.org/10.1080/08916152.2018.1531955 SN - 0891-6152 VL - 32 IS - 5 SP - 411 EP - 425 PB - Taylor & Francis ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Canal, Cansu Deniz A1 - Boke, Yakup Erhan T1 - Computational investigation of oxy-combustion of pulverized coal and biomass in a swirl burner JF - Energy Y1 - 2022 U6 - https://doi.org/10.1016/j.energy.2021.121852 SN - 0360-5442 VL - 238 IS - C PB - Elsevier ER - TY - JOUR A1 - Basaran, Anil A1 - Benim, Ali Cemal A1 - Yurddas, Ali T1 - Numerical Simulation of the Condensation Flow of the Isobutane (R600a) inside Microchannel JF - Heat Transfer Engineering Y1 - 2021 U6 - https://doi.org/10.1080/01457632.2021.1874668 SN - 0145-7632 VL - 43 IS - 3-5 SP - 337 EP - 361 PB - Taylor & Francis ER - TY - JOUR A1 - Keshavanarayana, Pradeep A1 - Ruess, Martin A1 - de Borst, René T1 - A feedback-loop extended stress fiber growth model with focal adhesion formation JF - International Journal of Solids and Structures Y1 - 2017 U6 - https://doi.org/10.1016/j.ijsolstr.2017.08.023 SN - 0020-7683 N1 - Open Archive VL - 128 SP - 160 EP - 173 PB - Elsevier ER - TY - JOUR A1 - Mabrouk, Riheb A1 - Naji, Hassane A1 - Benim, Ali Cemal A1 - Dhahri, Hacen T1 - A State of the Art Review on Sensible and Latent Heat Thermal Energy Storage Processes in Porous Media: Mesoscopic Simulation JF - Applied Sciences KW - DOAJ Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40343 VL - 12 IS - 14 PB - MDPI ER - TY - JOUR A1 - Biedermann, Till M. A1 - Czeckay, Pasquale A1 - Hintzen, Nils A1 - Kameier, Frank A1 - Paschereit, C. O. T1 - Applicability of Aeroacoustic Scaling Laws of Leading Edge Serrations for Rotating Applications JF - acoustics KW - DOAJ KW - ISAVE Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40311 SN - 2624-599X VL - 2 IS - 3 SP - 579 EP - 594 PB - MDPI ER - TY - JOUR A1 - Failing, Luisa A1 - Kaluza, Stefan A1 - Strucks, Peter T1 - Catalytic CO2 methanation: Providing optimal test conditions for kinetic investigations JF - Chemie Ingenieur Technik N2 - In the context of using renewable energies and recycling climate-changing gases, methanation of CO2 provides one possibility. However, volatile availability of renewable energies for hydrogen production and fluctuating CO2streams from different sources lead to enhanced demand in investigating the influence of dynamic process operation on the catalyst performance, including detailed kinetic characterization. Reliable kinetic measurements require isothermal temperature control and absence of macrokinetic diffusion limitations. Both were investigated in this work while the determination of steady-state kinetic parameters is part of ongoing studies. Furthermore, a detailed analysis with respect to the long-term-stability of the nickel-based catalyst was performed KW - CO2 methanation KW - Kinetics KW - Long-term stability KW - Ni catalyst KW - Power-to-Gas Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40026 SN - 1522-2640 VL - 95 IS - 5 SP - 749 EP - 753 PB - Wiley ER - TY - JOUR A1 - Niemann, Joerg A1 - Fussenecker, Claudia A1 - Schloesser, Martin A1 - Ocakci, Elif T1 - THE WORKERS PERSPECTIVE - EYE TRACKING IN PRODUCTION ENVIRONMENTS JF - ACTA TECHNICA NAPOCENSIS SERIES-APPLIED MATHEMATICS MECHANICS AND ENGINEERING Y1 - 2021 SN - 1221-5872 VL - 64 IS - 1 SP - 7 EP - 14 PB - Technical University of Cluj-Napoca ER - TY - JOUR A1 - Pfeiffelmann, Bjorn A1 - Ozman, Cansu A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Analysis of the effect of nonuniform surface temperature distribution on the performance of a thermoelectric generator JF - Sustainable Energy Technologies and Assessments Y1 - 2022 U6 - https://doi.org/10.1016/j.seta.2022.102375 SN - 2213-1388 VL - 53 IS - A PB - Elsevier ER - TY - GEN A1 - Adam, Mario T1 - Windheizung 2.0 – Erfolgreiche Umsetzung der EU-Nachhaltigkeitsziele T2 - hn21 Journal KW - Windheizung 2.0 Y1 - 2022 UR - https://www.hn-nrw.de/aktivitaeten/publikationen/journal/# SP - 1 EP - 1 PB - Zentrum für Forschungskommunikation CY - Köln ER - TY - GEN A1 - Deckert, Carsten A1 - Phan Ngoc, Duc Anh T1 - PlayStation 4 vs. Xbox One: Competitive Analysis of the Video Game Industry T3 - Business Cases in Industrial Engineering - 3 KW - Business Case KW - Strategy KW - Delta Model KW - Video Game Industry Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41142 CY - Düsseldorf ER - TY - GEN A1 - Deckert, Carsten A1 - Lauermann, Paul T1 - Warum ist es am Rhein so schön? Strategische Ausrichtung des Binnenhafens Bonn T3 - Business Cases in Industrial Engineering - 1 KW - Business Case KW - Hafen KW - Strategie KW - Logistik Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41121 CY - Düsseldorf ER - TY - GEN A1 - Deckert, Carsten T1 - Now What You Hear Is Not a Test: The Invention and Commercialization of Rap Music T3 - Business Cases in Industrial Engineering - 2 KW - Business Case KW - Musikindustrie KW - Entrepreneurship KW - Innovation Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41134 CY - Düsseldorf ER - TY - RPRT A1 - Niemann, Jörg A1 - Bruckmann, Julian A1 - Krautzer, Florian T1 - Green City Deals: A study on the global warming potential of alternative urban transportation systems N2 - The population is growing constantly in urban areas. This results in an increasing demand for mobility solutions while it is also worldwide aimed to reduce greenhouse gas emissions. This paper summarizes the results of a comparative study concerning the greenhouse gas emissions (based on carbon footprint) caused by alternative urban passenger transportation systems. The emissions for the vehicles and their infrastructure are analyszed over the entire life cycle from manufacturing up to their end of life. An existing cable car sytem in La Paz, Bolivia was analysed and evaluated in comparison to other modes of transportation such as small busses, large busses and a tram. According to the system definitions and the considered balance framework the study shows that beside the use of the systems the materials and the manufacturing as well as the infrastructure have a significant impact on the total emissions over the life cycle. To put focus on the „true and real“ impacts to the society it is preferable to consider the measurement results in total absolute emissions. KW - Carbon footprint KW - urban mobility KW - cable car KW - bus KW - tram KW - transport planning KW - city planning Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28972 CY - Düsseldorf ER - TY - CHAP A1 - Tischbein, Franziska A1 - Fatemi, Armin A1 - Wirtz, Frank A1 - Schmoger, Christin A1 - Dorendorf, Stefan A1 - Schurtz, Annika A1 - Echternacht, David A1 - Ulbig, Andreas T1 - Development of Strategies for the Smartification of Low-Voltage Grids T2 - ETG-Fb. 170: ETG Kongress 2023 : Die Energiewende beschleunigen, 25. – 26.05.2023 in Kasse Y1 - 2023 SN - 978-3-8007-6108-1 VL - ETG-Fachberichte 170 SP - 438 EP - 444 PB - VDE CY - Berlin ER - TY - CHAP A1 - Fatemi, Armin A1 - Tischbein, Franziska A1 - Wirtz, Frank A1 - Schmoger, Christin A1 - Dorendorf, Stefan A1 - Schurtz, Annika A1 - Echternacht, David A1 - Ulbig, Andreas T1 - On the Impact of Smartification Strategies for the State Estimation of Low Voltage Grids T2 - 13th "Internationale Energiewirtschaftstagung" (IEWT2023), February 15-17, 2023, Vienna, Austria N2 - The decarbonization of for example the energy or heat sector leads to the transformation of distribution grids. The expansion of decentralized energy resources and the integration of new consumers due to sector coupling (e.g. heat pumps or electric vehicles) into low voltage grids increases the need for grid expansion and usage of flexibilities in the grid. A high observability of the current grid status is needed to perform these tasks efficiently and effectively. Therefore, there is a need to increase the observability of low voltage grids by installing measurement technologies (e.g. smart meters). Multiple different measurement technologies are available for low voltage grids which can vary in their benefit to observation quality and their installation costs. Therefore, Bayernwerk Netz GmbH and E.DIS AG in cooperation with E-Bridge Consulting GmbH and the Institute for High Voltage Equipment and Grids, Digitalization and Energy Economics (IAEW) investigated the effectiveness of different strategies for the smartification of low voltage grids. This paper presents the methodology used for the investigation and exemplary results focusing on the impact of intelligent cable distribution cabinets and smart meters on the quality of the state estimation. KW - State Estimation KW - Smart Meter KW - Grid Observability KW - Measurement Technologies Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41282 SP - 1 EP - 15 CY - Wien ER - TY - CHAP A1 - Lehmann, Matthias A1 - Wittpahl, Christian A1 - Zakour, Hatem Ben A1 - Braun, Alexander ED - Haverkamp, Nils ED - Youngworth, Richard N. T1 - Resolution and accuracy of non-linear regression of PSF with artificial neural networks T2 - SPIE Optical Systems Design: Optical Instrument Science, Technology, and Applications, 2018, Frankfurt, Germany N2 - In a previous work we have demonstrated a novel numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The novelty lies in the portability and the parameterization of this model, which allows for completely new ways to validate optical systems, which is especially interesting for mass production optics like in the automotive industry, but also for ophtalmology. The numerical basis for this model is a non-linear regression of the PSF with an artificial neural network (ANN). In this work we examine two important aspects of this model: the spatial resolution and the accuracy of the model. Measurement and simulation of a PSF can have a much higher resolution then the typical pixel size used in current camera sensors, especially those for the automotive industry. We discuss the influence this has on on the topology of the ANN and the final application where the modeled PSF is actually used. Another important influence on the accuracy of the trained ANN is the error metric which is used during training. The PSF is a distinctly non-linear function, which varies strongly over field and defocus, but nonetheless exhibits strong symmetries and spatial relations. Therefore we examine different distance and similarity measures and discuss its influence on the modeling performance of the ANN. Y1 - 2018 U6 - https://doi.org/10.1117/12.2313144 N1 - Preprint bei ArXiv verfügbar. VL - Proc. SPIE, Vol. 10695 IS - 106950C SP - 52 EP - 63 PB - International Society for Optics and Photonics CY - Frankfurt ER - TY - CHAP A1 - Brettschneider, Nico A1 - Herder, Jens A1 - de Mooij, Jeroen A1 - Ryskeldiev, Bektur ED - Herder, Jens T1 - Audio vs. Visual Avatars as Guides in Virtual Environments T2 - 21th International Conference on Human and Computer, HC-2018, March 27–28, 2019, Shizuoka University, Hamamatsu, Japan. N2 - Through constant technical progress, multi-user virtual reality is transforming towards a social activity that is no longer only used by remote users, but also in large-scale location-based experiences. We evaluate the usage of realtime-tracked avatars in co-located business-oriented applications in a "guide-user-scenario" in comparison to audio only instructions. The present study examined the effect of an avatar-guide on the user-related factors of Spatial Presence, Social Presence, User Experience and Task Load in order to propose design guidelines for co-located collaborative immersive virtual environments. Therefore, an application was developed and a user study with 40 participants was conducted in order to compare both guiding techniques of a realtime-tracked avatar guide and a non-visualised guide with otherwise constant conditions. Results reveal that the avatar-guide enhanced and stimulated communicative processes while facilitating interaction possibilities and creating a higher sense of mental immersion for users. Furthermore, the avatar-guide appeared to make the storyline more engaging and exciting while helping users adapt to the medium of virtual reality. Even though no assertion could be made concerning the Task Load factor, the avatar-guide achieved a higher subjective value on User Experience. Due to the results, avatars can be considered valuable social elements in the design of future co-located collaborative virtual environments. KW - Virtual Reality KW - Co-located Collaborations KW - Networked Immersive Virtual Environments KW - Head-mounted Display KW - Avatars KW - Lehre Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-23859 UR - https://vsvr.medien.hs-duesseldorf.de/publications/hc2018-avatar/ PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Lehmann, Matthias A1 - Wittpahl, Christian A1 - Zakour, Hatem Ben A1 - Braun, Alexander T1 - Modeling realistic optical aberrations to reuse existing drive scene recordings for autonomous driving validation JF - Journal of Electronic Imaging N2 - Training autonomous vehicles requires lots of driving sequences in all situations. Collecting and labeling these drive scenes is a very time-consuming and expensive process. Currently, it is not possible to reuse these drive scenes with different optical properties, because there exists no numerically efficient model for the transfer function of the optical system. We present a numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network. The novelty lies in the portability and the parameterization of this model. We present a lens measurement series, yielding a numerical function for the PSF that depends only on the parameters defocus, field, and azimuth. By convolving existing images and videos with this PSF, we generate images as if seen through the measured lens. The methodology applies to any optical scenario, but we focus on the context of autonomous driving, where the quality of the detection algorithms depends directly on the optical quality of the used camera system. With this model, it is possible to reuse existing recordings, with the potential to avoid millions of test drive miles. The parameterization of the optical model allows for a method to validate the functional and safety limits of camera-based advanced driver assistance systems based on the real, measured lens actually used in the product. Y1 - 2019 U6 - https://doi.org/10.1117/1.JEI.28.1.013005 SN - 1560-229X VL - 28 IS - 1 SP - 013005 PB - SPIE ER - TY - JOUR A1 - Lehmann, Matthias A1 - Wittpahl, Christian A1 - Zakour, Hatem Ben A1 - Braun, Alexander T1 - Resolution and accuracy of nonlinear regression of point spread function with artificial neural networks JF - Optical Engineering N2 - We had already demonstrated a numerical model for the point spread function (PSF) of an optical system that can efficiently model both the experimental measurements and the lens design simulations of the PSF. The novelty lies in the portability and the parameterization of this model, which allow for completely new ways to validate optical systems, which is especially interesting not only for mass production optics such as in the automotive industry but also for ophthalmology. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network (ANN). After briefly describing both the principle and the applications of the model, we then discuss two optically important aspects: the spatial resolution and the accuracy of the model. Using mean squared error (MSE) as a metric, we vary the topology of the neural network, both in the number of neurons and in the number of hidden layers. Measurement and simulation of a PSF can have a much higher spatial resolution than the typical pixel size used in current camera sensors. We discuss the influence this has on the topology of the ANN. The relative accuracy of the averaged pixel MSE is below 10  −  4, thus giving confidence that the regression does indeed model the measurement data with good accuracy. This article is only the starting point, and we propose several research avenues for future work. Y1 - 2019 U6 - https://doi.org/10.1117/1.oe.58.4.045101 SN - 0091-3286 VL - 58 IS - 4 SP - 045101 PB - SPIE ER - TY - JOUR A1 - Wohlers, Luis Constantin A1 - Müller, Patrick A1 - Braun, Alexander T1 - Original image noise reconstruction for spatially-varying filtered driving scenes JF - Electronic Imaging: Society for Imaging Science and Technology Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41479 SN - 2470-1173 VL - 34 IS - 16 SP - 1 EP - 7 PB - Society for Imaging Sciences and Technology ER - TY - JOUR A1 - Wolf, Dominik Werner A1 - Ulrich, Markus A1 - Braun, Alexander T1 - Novel developments of refractive power measurement techniques in the automotive world JF - Metrologia N2 - Refractive power measurements serve as the primary quality standard in the automotive glazing industry. In the light of autonomous driving new optical metrics are becoming more and more popular for specifying optical quality requirements for the windshield. Nevertheless, the link between those quantities and the refractive power needs to be established in order to ensure a holistic requirement profile for the windshield. As a consequence, traceable high-resolution refractive power measurements are still required for the glass quality assessment. Standard measurement systems using Moiré patterns for refractive power monitoring in the automotive industry are highly resolution limited, wherefore they are insufficient for evaluating the camera window area. Consequently, there is a need for more sophisticated refractive power measurement systems that provide a higher spatial resolution. In addition, a calibration procedure has to be developed in order to guarantee for comparability of the measurement results. For increasing the resolution, a measurement setup based on an auto-correlation algorithm is tested in this paper. Furthermore, a calibration procedure is established by using a single reference lens with a nominal refractive power of 100 km-1. For the calibration of the entire measurement range of the system, the lens is tilted by an inclination angle orthogonal to the optical axis. The effective refractive power is then given by the Kerkhof model. By adopting the measurement and calibration procedure presented in this paper, glass suppliers in the automotive industry will be able to detect relevant manufacturing defects within the camera window area more accurately paving the way for a holistic quality assurance of the windshield for future advanced driver-assistance system (ADAS) functionalities. Concurrently, the traceability of the measurement results is ensured by establishing a calibration chain based on a single reference lens, which is traced back to international standards. Y1 - 2023 UR - http://iopscience.iop.org/article/10.1088/1681-7575/acf1a4 U6 - https://doi.org/10.1088/1681-7575/acf1a4 SN - 1681-7575 IS - ACCEPTED MANUSCRIPT PB - IOP Publishing ER - TY - JOUR A1 - Müller, Patrick A1 - Braun, Alexander T1 - MTF as a performance indicator for AI algorithms? JF - Electronic Imaging: Society for Imaging Science and Technology N2 - Abstract The modulation-transfer function (MTF) is a fundamental optical metric to measure the optical quality of an imaging system. In the automotive industry it is used to qualify camera systems for ADAS/AD. Each modern ADAS/AD system includes evaluation algorithms for environment perception and decision making that are based on AI/ML methods and neural networks. The performance of these AI algorithms is measured by established metrics like Average Precision (AP) or precision-recall-curves. In this article we research the robustness of the link between the optical quality metric and the AI performance metric. A series of numerical experiments were performed with object detection and instance segmentation algorithms (cars, pedestrians) evaluated on image databases with varying optical quality. We demonstrate with these that for strong optical aberrations a distinct performance loss is apparent, but that for subtle optical quality differences – as might arise during production tolerances – this link does not exhibit a satisfactory correlation. This calls into question how reliable the current industry practice is where a produced camera is tested end-of-line (EOL) with the MTF, and fixed MTF thresholds are used to qualify the performance of the camera-under-test. KW - AI performance metrics KW - Artificial Intelligence KW - Modulation Transfer Function (MTF) KW - Optical Quality KW - Perception Y1 - 2023 U6 - https://doi.org/10.2352/EI.2023.35.16.AVM-125 SN - 2470-1173 VL - 35 IS - 16 SP - 1 EP - 7 PB - Society for Imaging Sciences and Technology ER - TY - CHAP A1 - Müller, Patrick A1 - Braun, Alexander A1 - Keuper, Margret T1 - Impact of realistic properties of the point spread function on classification tasks to reveal a possible distribution shift T2 - NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA KW - chromatic aberration KW - corruption KW - Deep Neural Networks KW - Distribution Shift KW - MTF Y1 - 2022 UR - https://openreview.net/forum?id=r7WJpE3oy0 CY - New Orleans ER - TY - CHAP A1 - Müller, Patrick A1 - Braun, Alexander T1 - Simulating optical properties to access novel metrological parameter ranges and the impact of different model approximations T2 - 2022 IEEE International Workshop on Metrology for Automotive (MetroAutomotive), 4-6 July 2022 Y1 - 2022 SN - 978-1-6654-6689-9 U6 - https://doi.org/10.1109/MetroAutomotive54295.2022.9855079 SP - 133 EP - 138 PB - IEEE ER - TY - JOUR A1 - Müller, Patrick A1 - Braun, Alexander T1 - Local performance evaluation of AI-algorithms with the generalized spatial recall index JF - tm - Technisches Messen Y1 - 2023 U6 - https://doi.org/10.1515/teme-2023-0013 SN - 2196-7113 VL - 90 IS - 7-8 SP - 464 EP - 477 PB - de Gruyter ER - TY - PAT A1 - Braun, Alexander A1 - Richwin, Matthias A1 - Weber, Thomas T1 - Optoelektronische Sensoreinrichtung für ein Kraftfahrzeug N2 - Beschrieben wird eine optoelektronische Sensoreinrichtung für ein Kraftfahrzeug zur unterscheidenden Detektion von Feuchtigkeit und Salzlösungen auf einer Fahrzeugscheibe, mit einer Beleuchtungseinheit zur Einstrahlung von Licht in eine Fahrzeugscheibe und mit einem Lichtempfänger, welcher von der Fahrzeugscheibe reflektiertes Licht erfasst, sowie mit einem Koppelelement zur Ein- und Auskopplung von Licht in bzw. aus der Fahrzeugscheibe, wobei die Beleuchtungseinrichtung Licht über einen Einfallswinkelbereich in die Fahrzeugscheibe einstrahlt, der sich über mehrere Winkelgrade erstreckt, wobei der Lichtempfänger eine Vielzahl von Empfangselementen aufweist, wobei ein optisches System das von der Fahrzeugscheibe in einen Ausfallswinkelbereich reflektierte Licht auf Empfangselemente des Lichtempfängers abbildet und wobei der Lichtempfänger ein Signal generiert, aus dem eine Auswertevorrichtung den Grenzwinkel der Totalreflexion an der Fahrzeugscheibe ermittelt. Y1 - 2009 UR - https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=DE102007052704A1 PB - Deutsches Patent- und Markenamt ER - TY - JOUR A1 - Müller, Patrick A1 - Brummel, Mattis A1 - Braun, Alexander T1 - Spatial recall index for machine learning algorithms JF - London Imaging Meeting N2 - We present a novel metric Spatial Recall Index to assess the performance of machine-learning (ML) algorithms for automotive applications, focusing on where in the image which performance occurs. Typical metrics like intersection-over-union (IoU), precisionrecallcurves or average precision (AP) quantify the performance over a whole database of images, neglecting spatial performance variations. But as the optics of camera systems are spatially variable over the field of view, the performance of ML-based algorithms is also a function of space, which we show in simulation: A realistic objective lens based on a Cooke-triplet that exhibits typical optical aberrations like astigmatism and chromatic aberration, all variable over field, is modeled. The model is then applied to a subset of the BDD100k dataset with spatially-varying kernels. We then quantify local changes in the performance of the pre-trained Mask R-CNN algorithm. Our examples demonstrate the spatial dependence of the performance of ML-based algorithms from the optical quality over field, highlighting the need to take the spatial dimension into account when training ML-based algorithms, especially when looking forward to autonomous driving applications. Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-35657 SN - 0-89208-346-6 VL - 2021 IS - 1 SP - 58 EP - 62 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Wittpahl, Christian A1 - Deegan, Brian A1 - Black, Bob A1 - Braun, Alexander T1 - An analytic-numerical image flicker study to test novel flicker metrics JF - Electronic Imaging: Society for Imaging Science and Technology Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-35671 SN - 2470-1173 IS - 17 SP - 1 EP - 8 PB - Society for Imaging Science and Technology ER - TY - CHAP A1 - Rakow, Thomas ED - Wojciechowski, Manfred T1 - Die Entwicklung von Lehrinhalten im Fach Datenbanken T1 - The development of teaching content in the subject of databases (in German) T2 - Forschungsreport 2022, Hochschule Düsseldorf N2 - Im Projekt EILD.nrw wurden Open Educational Resources (OER) für die Lehre im Fach Datenbanken entwickelt. Lehrende können die Tools und Kurse in einer Vielzahl von Lernszenarien einsetzen. Studierende der Informatik und Anwendungsfächer lernen den kompletten Lebenszyklus von Datenbanken kennen. Zu diesem Zweck wurden Quizze, interaktive Tools, Lehrvideos und Kurse für Lernmanagementsysteme entwickelt und unter einer Creative Commons-Lizenz veröffentlicht. N2 - In the EILD.nrw project, Open Educational Resources (OER) are being developed for teaching databases. Instructors can use the tools and courses in a variety of learning scenarios. Students of computer science and application subjects learn the complete life cycle of databases. For this purpose, quizzes, interactive tools, instructional videos, and courses for learning management systems were developed and published under a Creative Commons license. KW - Lehrinhalte KW - teaching content KW - Datenbanken KW - Hochschule KW - OER KW - databases KW - higher education Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42822 UR - https://doi.org/10.20385/opus4-4007 SP - 112 EP - 113 CY - Düsseldorf ER - TY - CHAP A1 - Kampann, Maximilian A1 - Goebel, Johannes A1 - Adam, Mario ED - Wesselak, Viktor T1 - Effizienzuntersuchungen an einem Wärmepumpensystem mit Schichtspeicher für Raumheizung und Trinkwarmwasser anhand von Hardware-in-the-Loop Versuchen T2 - Tagungsband: 6. Regenerative Energietechnik Konferenz in Nordhausen, 9.-10.2.2023 Y1 - 2023 UR - https://www.hs-nordhausen.de/fileadmin/Dateien/Forschung/2021/Tagungsband_RETCon_2023_Web.pdf SN - 978-3-940820-21-1 SP - 176 EP - 188 PB - Nordhausen CY - Hochschule Nordhausen ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Biswas, Nirmalendu A1 - Manna, Nirmal K A1 - Benim, Ali Cemal T1 - Impact of chimney divergence and sloped absorber on energy efficacy of a solar chimney power plant (SCPP) JF - Ain Shams Engineering Journal N2 - A numerical study is carried out meticulously to scrutinize the impact of different shapes of chimneys like circular (outer dia, dc), convergent (outer dia, 0.5dc), divergent (outer dia, 1.5dc), sudden contraction (outer dia, 0.5dc), and sudden expansion (outer dia, 1.5dc) on the performance of an SCPP. Furthermore, the parametric impact with different chimney divergence angles (CDA, ϕ), and ground absorber slope angle (GSA, γ) on the SCPP performance is also scrutinized. Optimum divergence angle (ϕ=+0.75◦) enhances the power generation up to ~ 47% (76 kW) with a horizontal ground absorber surface. An increase or decrease in CDA lessens the power generation. With a sloped ground absorber angle γ=0.6◦, the gain in power generation is 60% (82 kW). The study of combination of ground sloped absorber (γ=0.6◦) and divergent chimney (ϕ=+0.75◦) shows enhancement of the power generation upto 80% (92 kW) more than the classical Manzaranes plant. KW - Solar chimney power plant (SCPP) KW - Chimney divergence angle KW - Sloped absorber surface KW - Power generation KW - Efficiency KW - Regression analysis Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42410 SN - 2090-4495 N1 - Datenverfügbarkeitserklärung: Daten, die die Ergebnisse dieser wissenschaftlichen Publikation stützen, sind auf begründete Anfrage bei dem*der korrespondierenden Autor*in erhältlich. PB - Elsevier ER - TY - JOUR A1 - Langmann, Reinhard A1 - Michael, Stiller T1 - The PLC as a Smart Service in Industry 4.0 Production System JF - Applied Sciences Y1 - 2019 U6 - https://doi.org/10.3390/app9183815 SN - 2076-3417 VL - 9 IS - 18 PB - MDPI ER - TY - RPRT A1 - Deckert, Carsten A1 - Kretschmar, Dominik A1 - Plagge, Christoph T1 - Auf einen gemeinsamen Nenner gebracht? – Reporting der Treibhausgas-Emissionen der Logistikunternehmen in Deutschland T3 - Working Papers in Industrial Engineering - 6 KW - Logistik KW - Nachhaltigkeit KW - Treibhausgasemissionen Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-43130 CY - Düsseldorf ER - TY - CHAP A1 - Grote, Wolfgang A1 - Schulze Darup, M. A1 - Reinig, G. T1 - Modellprädiktive Regelung von Entnahmeturbinen und Dampfnetzen (Poster) T2 - Chemie Ingenieur Technik Y1 - 2009 U6 - https://doi.org/10.1002/cite.200950184 VL - 2009 IS - 8 SP - 1113 EP - 1114 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Biswas, Nirmalendu A1 - Mandal, Dipak Kumar A1 - Manna, Nirmal K. A1 - Benim, Ali Cemal T1 - Magneto-hydrothermal triple-convection in a W-shaped porous cavity containing oxytactic bacteria JF - scientific reports N2 - Bioconvective heat and mass transport phenomena have recently been the subject of interest in diverse fields of applications pertaining to the motion of fluids and their thermophysical properties. The transport processes in a system involving triple convective phenomena, irregular geometry, and boundary conditions constitute a complex phenomenon. This work aims to explore the mixed thermo-bioconvection of magnetically susceptible fluid containing copper nanoparticles and oxytactic bacteria in a novel W-shaped porous cavity. The buoyant convention is generated due to the isothermal heating at the wavy bottom wall, whereas the mixed convection is induced due to the shearing motion of the top-cooled sliding wall. Furthermore, the bioconvection is induced due to the manifestation of oxytactic bacteria or organisms. The inclined sidewalls are insulated. The geometry is packed with water based Cu nanoparticle mixed porous structure, which is subjected to a magnetizing field acted horizontally. The complex transport equations are transformed into nondimensional forms, which are then computed using the finite volume-based developed code. The coupled triple-convective flow physics are explored for a wide range of involved controlling parameters, which could provide helpful insight to the system designer for its proper operation. The shape of geometry can be considered one of the important parameters to control the heat and mass transport phenomena. In general, the influence of amplitude (δ) is more compared to the waviness number (m) of the undulations. The magnitude of heat (Nu) and mass (Sh) transfer rate for the W-shaped cavity is high compared to conventional square and trapezoidal-shaped cavities. The output of the analysis could be very helpful for the designer for modeling devices operating on nanotechnology-based bioconvection, microbial fuel cells, and others. KW - DOAJ Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40041 SN - 2045-2322 VL - 12 PB - Springer Nature ER - TY - CHAP A1 - Stöhr, Marcel A1 - Zielke, Thomas ED - Leipzig, Konrad von ED - Sacks, Natasha ED - Mc Clelland, Michelle T1 - Machine Learning for Soft Sensors and an Application in Cement Production T2 - Smart, Sustainable Manufacturing in an Ever-Changing World Proceedings of International Conference on Competitive Manufacturing (COMA ’22) KW - Soft sensors KW - Machine learning KW - Dynamic processes KW - Cement production KW - Robustness KW - Artificial intelligence Y1 - 2023 SN - 978-3-031-15604-5 U6 - https://doi.org/10.1007/978-3-031-15602-1_46 VL - Lecture Notes in Production Engineering SP - 627 EP - 638 PB - Springer CY - Cham ER - TY - JOUR A1 - Geerkens, Simon A1 - Sieberichs, Christian A1 - Braun, Alexander A1 - Waschulzik, Thomas T1 - QI²: an interactive tool for data quality assurance JF - AI and Ethics N2 - The importance of high data quality is increasing with the growing impact and distribution of ML systems and big data. Also, the planned AI Act from the European commission defines challenging legal requirements for data quality especially for the market introduction of safety relevant ML systems. In this paper, we introduce a novel approach that supports the data quality assurance process of multiple data quality aspects. This approach enables the verification of quantitative data quality requirements. The concept and benefits are introduced and explained on small example data sets. How the method is applied is demonstrated on the well-known MNIST data set based an handwritten digits. KW - Performance metrics KW - HSD Publikationsfonds KW - DEAL KW - DFG Publikationskosten KW - Machine learning KW - Quality assurance KW - Data integrity KW - Data quality Y1 - 2024 U6 - https://doi.org/10.1007/s43681-023-00390-6 SN - 2730-5961 N1 - Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 532148125 and supported by the central publication fund of Hochschule Düsseldorf University of Applied Sciences Data availability declaration: The data that support the findings of this scientific publication are available from the corresponding author upon reasonable request. PB - Springer Nature ER - TY - JOUR A1 - Sieberichs, Christian A1 - Geerkens, Simon A1 - Braun, Alexander A1 - Waschulzik, Thomas T1 - ECS: an interactive tool for data quality assurance JF - AI and Ethics N2 - With the increasing capabilities of machine learning systems and their potential use in safety-critical systems, ensuring high-quality data is becoming increasingly important. In this paper, we present a novel approach for the assurance of data quality. For this purpose, the mathematical basics are first discussed and the approach is presented using multiple examples. This results in the detection of data points with potentially harmful properties for the use in safety-critical systems. KW - DEAL KW - HSD Publikationsfonds KW - Data visulization KW - Distance based KW - Data quality assurance KW - Equivalence class sets KW - DFG Publikationskosten Y1 - 2024 U6 - https://doi.org/10.1007/s43681-023-00393-3 SN - 2730-5961 N1 - Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 532148125 and supported by the central publication fund of Hochschule Düsseldorf University of Applied Sciences Data availability declaration: All data that support the findings of this scientific publication are available within this paper and/or its supplementary information files/materials. Otherwise: The data that support the findings of this scientific publication are available from the corresponding author upon reasonable request. PB - Springer Nature ER - TY - INPR A1 - Geerkens, Simon A1 - Sieberichs, Christian A1 - Braun, Alexander A1 - Waschulzik, Thomas T1 - QI2 -- an Interactive Tool for Data Quality Assurance N2 - The importance of high data quality is increasing with the growing impact and distribution of ML systems and big data. Also the planned AI Act from the European commission defines challenging legal requirements for data quality especially for the market introduction of safety relevant ML systems. In this paper we introduce a novel approach that supports the data quality assurance process of multiple data quality aspects. This approach enables the verification of quantitative data quality requirements. The concept and benefits are introduced and explained on small example data sets. How the method is applied is demonstrated on the well known MNIST data set based an handwritten digits. KW - Data Structures and Algorithms KW - Machine Learning KW - Computers and Society KW - Artificial Intelligence Y1 - 2023 CY - arXiv ER - TY - INPR A1 - Sieberichs, Christian A1 - Geerkens, Simon A1 - Braun, Alexander A1 - Waschulzik, Thomas T1 - ECS -- an Interactive Tool for Data Quality Assurance N2 - With the increasing capabilities of machine learning systems and their potential use in safety-critical systems, ensuring high-quality data is becoming increasingly important. In this paper we present a novel approach for the assurance of data quality. For this purpose, the mathematical basics are first discussed and the approach is presented using multiple examples. This results in the detection of data points with potentially harmful properties for the use in safety-critical systems. KW - Artificial Intelligence KW - Machine Learning KW - PrePrint KW - Systems and Control Y1 - 2023 U6 - https://doi.org/10.48550/arXiv.2307.04368 PB - arXiv ER - TY - JOUR A1 - Molloy, Dara A1 - Müller, Patrick A1 - Deegan, Brian A1 - Mullins, Darragh A1 - Horgan, Jonathan A1 - Ward, Enda A1 - Jones, Edward A1 - Braun, Alexander A1 - Glavin, Martin T1 - Analysis of the Impact of Lens Blur on Safety-Critical Automotive Object Detection JF - IEEE Access N2 - Camera-based object detection is widely used in safety-critical applications such as advanced driver assistance systems (ADAS) and autonomous vehicle research. Road infrastructure has been designed for human vision, so computer vision, with RGB cameras, is a vital source of semantic information from the environment. Sensors, such as LIDAR and RADAR, are also often utilized for these applications; however, cameras provide a higher spatial resolution and color information. The spatial frequency response (SFR), or sharpness of a camera, utilized in object detection systems must be sufficient to allow a detection algorithm to localize objects in the environment over its lifetime reliably. This study explores the relationship between object detection performance and SFR. Six state-of-the-art object detection models are evaluated with varying levels of lens defocus. A novel raw image dataset is created and utilized, containing pedestrians and cars over a range of distances up to 100-m from the sensor. Object detection performance for each defocused dataset is analyzed over a range of distances to determine the minimum SFR necessary in each case. Results show that the relationship between object detection performance and lens blur is much more complex than previous studies have found due to lens field curvature, chromatic aberration, and astigmatisms. We have found that smaller objects are disproportionately impacted by lens blur, and different object detection models have differing levels of robustness to lens blur KW - DOAJ KW - Object detection KW - intelligent transportation system KW - autonomous vehicles KW - ADAS KW - lens blur Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42999 SN - 2169-3536 VL - 12 SP - 3554 EP - 3569 PB - IEEE ER - TY - CHAP A1 - Lorenzen, Finn A1 - Schönig, Felix A1 - Grote-Ramm, Wolfgang A1 - Oliveira Brito, Marcel A1 - Neuberger, Heiko A1 - Sobolyev, Alexander T1 - Continual Adaptation of Compressor Maps During Operation on Measurement Data For Increased Performance of Model-Based Applications in Turbomachinery T2 - ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, June 26–30, 2023 Boston, Massachusetts, USA N2 - Higher control engineering concepts, including artificial intelligence and model-based control, are recently becoming more popular in complex industrial applications because they enable a significant increase in efficiency. E.g., a model-based approach can be used to enhance the control and monitoring of several coupled components of a larger turbomachinery train. This requires dynamic models of the components, including all machine characteristics, which may experience a shift in their behavior over the course of their lifetime. Such changes occur due to natural fouling, wear of sub-components or external effects induced by maintenance measures. To overcome this problem, we model machine-characteristic maps with artificial neural networks, which may be used as part of prediction models in a model predictive control unit. If an appropriate data set is available, this allows us to adapt the model to the current behavior of the machine without requiring in-depth knowledge about the underlying physics of this “concept drift”, as it is known in literature. However, the training of neural networks is usually connected with high computational effort while the task needs to be executed in real-time during operation. Furthermore, in real operating conditions, machine sensors can only provide labeled data from the current operating point of the machine, which can be stationary for long operation periods of up to several months. In general, this yields only an unrepresentative data subset of the machine-characteristics, which is not sufficient to retrain the whole model to a new state. To solve these problems, we firstly reduce the model adaptation to a convex optimization problem, which can be efficiently solved in real-time conditions. Secondly, we use a specialized data management system with which we can integrate historical data to supplement the unrepresentative data subset. In this paper we show the application of the outlined method on a compressor map and discuss the advantages and requirements of the method in the context of modeling applications for industrial turbomachinery. KW - compressors KW - Intelligent control KW - Neural networks KW - Modeling Y1 - 2023 SN - 978-0-7918-8697-7 U6 - https://doi.org/10.1115/GT2023-103458 VL - Volume 4 SP - 1 EP - 7 PB - ASME CY - Boston ER - TY - JOUR A1 - Grote-Ramm, Wolfgang A1 - Lanuschny, David A1 - Lorenzen, Finn A1 - Oliveira Brito, Marcel A1 - Schönig, Felix T1 - Continual learning for neural regression networks to cope with concept drift in industrial processes using convex optimisation JF - Engineering Applications of Artificial Intelligence N2 - Process models in industrial applications, e.g. predictive maintenance or automation, are subject to both divergence from the underlying system due to their time-variant nature and to high complexity resulting from a wide operational range being covered. Hence, regression models require high accuracy for the present system state and at the same time need to be valid across the whole system operating space. While accuracy for the current system state can be gained by updating the model on the current data, the overall validity must often be retrieved from historical or design data. We propose a method to find an appropriate compromise for these two demands. A pre-trained artificial neural network (ANN) is continually updated on the current sensor data stream using convex optimisation. Thus, a unique and optimal solution is generated in each update step, while robust regression accuracy on the domain that is not covered by the arriving data subset is maintained. This is achieved by introducing a data management system to provide some historical data, constraining the optimisation problem and manipulating the architecture of the ANN. Models updated with this method show reasonable stability but display plastic behaviour at the current operating point. KW - Continual learning KW - Concept drift KW - Catastrophic forgetting KW - Convex optimization Y1 - 2023 U6 - https://doi.org/10.1016/j.engappai.2023.105927 SN - 1873-6769 VL - 120 PB - Elsevier CY - New York ER - TY - CHAP A1 - Schramm, Alexander A1 - Kruger, Karl A1 - Niemann, Jörg A1 - Grote, Wolfgang ED - Dimitrov, Dimiter ED - Hagedorn-Hansen, Devon ED - Leipzig, Karl von T1 - Possibilities, Limitations and Considerations for Eye Tracking in Industrial Environments: Experience from a Case Study T2 - International Conference on Competitive Manufacturing (COMA 19) proceedings : 30 January 2019-1 February 2019, Stellenbosch, South Africa N2 - Eye tracking is a measurement technique for determining the orientation and viewing direction of an individual’s eyes. It allows for an evaluation of the individual’s gaze and other related information.There is a wide variety of application areas for eye tracking, however the usage in engineeringindustry is still limited. This paper presents a case study for the use of eye tracking in a testingstation for electrical circuit breakers. The case study aims to evaluate the measurement and analysispossible with the Tobii wearable eye tracking system. From the case study, possibilities, limitationsand considerations for eye tracking in industrial settings are identified and discussed. The paperconcludes that while eye tracking can be used to effectively capture and visualize insightfulinformation, it faces major challenges related to subjectivity in analysis and labour intensiveness. KW - Eye Tracking Y1 - 2019 SN - 978-0-7972-1779-9 SP - 390 EP - 396 PB - Department of Industrial Engineering, Stellenbosch University CY - Stellenbosch ER - TY - JOUR A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Möllenbruck, Florian A1 - Mönnigmann, Martin T1 - Plant-wide control of a parabolic trough power plant with thermal energy storage JF - IFAC Proceedings Volumes N2 - We present a control scheme for a parabolic trough power plant that is equipped with a molten salt thermal energy storage system. We show that the multivariable control problem for the solar field can be decoupled by controlling the three way valve that splits the heat transfer fluid between the storage system and the steam generator. The steam generation cycle is regulated with inlet pressure control. The subsystems of the plant are modeled based on first principles, where we focus on the steam generation cycle. A multi-group extraction turbine with pre- and reheater is considered, which is suitable for solar power plants. We demonstrate the benefits of the proposed control scheme with a day-to-day simulation. KW - Control of power plants KW - Solar power plants KW - Thermal energy storage KW - Decoupling control Y1 - 2014 U6 - https://doi.org/10.3182/20140824-6-ZA-1003.00879 SN - 2589-3653 VL - 47 IS - 3 SP - 419 EP - 425 PB - Elsevier ER - TY - JOUR A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Guaranteed stability in optimal power generation dispatching under uncertainty JF - IEEE Transactions on Power Systems N2 - Stability and cost optimality of power generation and supply systems must not be considered independently from one another. Simple examples show that optimizing cost without considering stability may result in modes of operation that, while economically optimal, are unstable. We demonstrate that stability, robustness, and optimality can be considered systematically and simultaneously by combining bifurcation theory and nonlinear optimization. Essentially, the proposed method enforces a backoff distance between the optimal point of operation and operational or stability boundaries in the space of the optimization variables, where bifurcation theory is used to describe nonlinear stability boundaries. KW - Normal vector method KW - Power dispatch KW - Robust optimization KW - Stability KW - Unit commitment Y1 - 2013 U6 - https://doi.org/10.1109/TPWRS.2012.2207970 SN - 1558-0679 VL - 28 IS - 2 SP - 1103 EP - 1112 PB - IEEE ER - TY - JOUR A1 - Mier, Dominik A1 - Möllenbruck, Florian A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Mönnigmann, Martin T1 - Model predictive control of the steam cycle in a solar power plant JF - IFAC-PapersOnLine N2 - We derive a nonlinear model of the steam cycle of a solar power plant, estimate its unknown parameters with measured data, and design a linear model predictive controller based on the resulting model. Simulations show that the linear model predictive controller is able to regulate the electrical power of the nonlinear steam process of the plant to a given reference trajectory very well. Moreover, it results in very good disturbance rejection. KW - Power plant control KW - solar power KW - model predictive control Y1 - 2015 U6 - https://doi.org/10.1016/j.ifacol.2015.09.052 SN - 2405-8963 VL - 48 IS - 8 SP - 710 EP - 715 PB - Elsevier ER - TY - CHAP A1 - Grote-Ramm, Wolfgang A1 - Schönig, Felix T1 - Model Predictive Control of Solar Receivers T2 - 25th Cologne Solar Colloquium (DLR) Y1 - 2022 UR - https://www.dlr.de/sf/PortalData/73/Resources/dokumente/soko/soko2022/DLR_Solar_Colloquium_2022_Model_Predictive_Control_GROTE-RAMM.pdf ER - TY - CHAP A1 - Beckers, Sebastian A1 - Pawlik, Julian A1 - Kiel, Jürgen A1 - Grote, Wolfgang T1 - Simulation von Partikelflugbahnen zur Auslegungshilfe von elektrostatischen Luftfiltern T2 - Tagungsband: ASIM Workshop 2019 - Simulation Technischer Systeme Grundlagen und Methoden in Modellbildung und Simulation, 21.-22. Februar 2019, Braunschweig Y1 - 2019 SN - 978-3-901608-06-3 U6 - https://doi.org/10.11128/arep.57 SP - 147 EP - 152 PB - ARGESIM, ASIM CY - Wien ER - TY - CHAP A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Optimal power system unit commitment with guaranteed local stability T2 - Proceedings of the 2011 American Control Conference N2 - This article deals with the cost optimal commitment of power systems. System stability is often only considered after solving the commitment problem. We show by example that a cost optimization may result in a mode of operation that, while economically optimal, is unstable or has otherwise unacceptable dynamics. As a remedy, we propose to use the so-called normal vector method, which has been developed for the optimization of nonlinear dynamical systems with stability boundaries and uncertain parameters. We apply the method to a small sample power grid, where the optimization goal is to minimize the energy production costs for a given power consumption. KW - Optimization KW - Power system stability KW - Robustness Y1 - 2011 U6 - https://doi.org/10.1109/ACC.2011.5991058 SN - 2378-5861 SP - 4526 EP - 4531 PB - IEEE ER - TY - CHAP A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Modellbasierte Regelung von Entnahmedampfturbinen (eingeladener Vortrag) T2 - 43. Regelungstechnisches Kolloquium in Boppard vom 25.-27. Februar 2009 KW - Modellierung von Dampfturbinen KW - Modellprädiktive Regelung KW - Generische Modelle KW - MIMO Regelung KW - Betriebsartenspezifische Regelung Y1 - 2009 UR - https://www.iosb.fraunhofer.de/content/dam/iosb/iosbtest/documents/veranstaltungen/boppard-regelungstechnisches-kolloquium/Programm_2009.pdf ER - TY - JOUR A1 - Uffmann, Kai A1 - Abicht, Claus A1 - Grote, Wolfgang A1 - Quick, Harald H. A1 - Ladd, Mark E. T1 - Design of an MR-compatible piezoelectric actuator for MR elastography JF - Concepts in Magnetic Resonance Part A: Bridging Education and Research N2 - Magnetic Resonance (MR) elastography is a method for measuring tissue elasticity via phase images acquired with an MR scanner. The propagation of periodic mechanical waves through the tissue can be captured by means of a modified phase contrast sequence. These waves are generated with a mechanical oscillator (actuator) and coupled into the tissue through the skin. The actuator must be capable of generating a sinusoidal excitation with excellent phase and amplitude stability, while not disturbing the MR imaging process. In this work, an actuator based on a piezoelectric principle was developed. Based on the imaging evaluation of several material samples, the housing for the piezoelectric ceramic was constructed of aluminum. Smaller parts of the housing were manufactured from brass and titanium to fulfill the mechanical constraints. A lever was used to transfer the oscillation generated by the piezoelectric ceramic to the point of excitation. The lever amplifies the piezoelectric motion, allowing for a more compact design. Three different lever designs were characterized by an acceleration sensor both outside and inside the magnet. It was shown that the rigidity of the lever, as determined by its material and form, was decisive in determining the resonant frequency of the system and therefore the maximum practical frequency of operation. It was also shown that the motion of the oscillator is unaffected by the electromagnetic fields of the MR imager. The final design can be placed directly in the magnet bore within a few centimeters of the tissue volume to be imaged without generating significant artifacts. An amplitude range of 0–1 mm in the frequency range from 0 to over 300 Hz was achieved, sufficient for performing most MR elastography applications. © 2002 Wiley Periodicals, Inc. Concepts in Magnetic Resonance (Magn Reson Engineering) 15: 239–254, 2002 KW - Elasticity KW - Elastography KW - Actuator KW - MRI KW - Piezoelectric Y1 - 2002 UR - 1552-5023 U6 - https://doi.org/https://doi.org/10.1002/cmr.10045 VL - 15 IS - 4 SP - 239 EP - 254 PB - Wiley ER - TY - JOUR A1 - Beyer, Marc-André A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Adaptive exact linearization control of batch polymerization reactors using a Sigma-Point Kalman Filter JF - Journal of Process Control N2 - The Chylla–Haase polymerization reactor is widely accepted as a benchmark process for the evaluation of control strategies for batch reactors. In this contribution a control concept based on Exact I/O-Linearization is proposed and compared to a conventional cascade control structure. In order to adapt the exact linearization control strategy to various polymerization products and batch conditions, an advanced probabilistic inference algorithm (Sigma-Point Kalman Filter) is applied and investigated. Sigma-Point Kalman Filters have the major improvement of simplified implementation compared to local linearization methods (i.e. Extended Kalman Filter) because no analytical Jacobians are required. Stochastic simulation studies are introduced and show the effectiveness, accuracy and benefit of the control concept. Within several scenarios a satisfying robustness against structural errors in the underlying model equations for the nonlinear control law and the inference algorithm is demonstrated. Furthermore it is pointed out, that with little effort in reassembling the plant design, control performance can be improved significantly. KW - Batch process operation KW - Exact I/O-Linearization control KW - Online parameter estimation KW - Sigma-Point Kalman Filter Y1 - 2008 UR - 1873-2771 U6 - https://doi.org/10.1016/j.jprocont.2007.12.002 VL - 18 IS - 7-8 SP - 663 EP - 675 PB - Elsevier ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Eggebrecht, Holger A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. E. T1 - Monitoring the Effects of Chronic Obstructive Pulmonary Disease on Muscle Elasticity by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with chronic obstructive pulmonary disease (COPD) show signs of muscle dysfunction, such as increased muscle fatigue and acidosis during exercise. We hypothesize that muscle elasticity of the lower extremities differs between patients with COPD and age-related controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in the maximum applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02015.pdf VL - 13 SP - 2015 ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Herrmann, Burkhard A1 - Brauck, K. A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. T1 - Measuring Skeletal Muscle Elasticity in Patients with Hypogonadism by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with hypogonadism have reduced fat-free mass and in some cases a loss in muscle strength. We hypothesize that muscle elasticity of the lower extremities differs between patients with hypogonadism and healthy controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02016.pdf VL - 13 SP - 2016 ER - TY - THES A1 - Grote, Wolfgang T1 - Ein Beitrag zur modellbasierten Regelung von Entnahmedampfturbinen KW - Dynamische Modellierung KW - Dampfturbine KW - Prädiktive Regelung KW - Dampfkraftwerk Y1 - 2009 UR - https://hss-opus.ub.ruhr-uni-bochum.de/opus4/2109 PB - Bochum ER - TY - CHAP A1 - Grote-Ramm, Wolfgang A1 - Schönig, Felix A1 - Schwarzbözl, Peter A1 - Drexelius, Maximilian A1 - Maldonado Quinto, Daniel A1 - Binder, Matthias T1 - Model Predictive Control and Service Life Monitoring for Molten Salt Solar Power Towers T2 - 29th SolarPACES Conference, Sydney N2 - A two-component system for control and monitoring of solar power towers with molten salt receivers is proposed. The control component consists of a model predictive control applica-tion (MPC) with a flexible objective function and on-line tunable weights, which runs on a In-dustrial PC and uses a reduced order dynamic model of the receiver’s thermal and flow dy-namics. The second component consists of a service-life monitoring unit, which estimates the service-life consumption of the absorber tubes depending on the current mode of operation based on thermal stresses and creep fatigue in the high temperature regime. The calculation of stresses is done based on a detailed finite element study, in which a digital twin of the re-ceiver was developed. By parallelising the model solver, the estimation of service-life con-sumption became capable of real-time operation. The system has been implemented at a test facility in Jülich, Germany, and awaits field experiments. In this paper, the modeling and archi-tecture are presented along simulation results, which were validated on a hardware-in-the-loop test bench. The MPC showed good disturbance rejection while respecting process variable constraints during the simulation studies. KW - Solar Power Tower KW - Molten Salt KW - Model Predictive Control KW - Dynamic Modelling KW - Service-life Monitoring Y1 - 2023 N1 - Eingereichter Beitrag ER -