TY - THES
A1 - Funke, Maren
T1 - Die Beeinflussbarkeit der für die ökologische Nachhaltigkeit relevanten KPIs durch die Digitalisierung in kleinen Unternehmen
N2 - Ist die Digitalisierung für kleine Unternehmen ein Werkzeug, Prozesse ökologisch nachhaltiger zu gestalten? Am Beispiel eines Baustoffhandels wird dies Untersucht. Die Aufstellung umweltbezogener KPIs für einzelne Prozesse jeweils vor und nach der (Teil-)Digitalisierung wird durchgeführt. Die Umweltauswirkungen der digitalen Transformation lassen sich somit messen und bewerten.
KW - Digitalisierung
KW - Klein- und Mittelbetrieb
KW - Nachhaltigkeit
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28992
PB - Technische Hochschule Brandenburg
CY - Brandenburg an der Havel
ER -
TY - THES
A1 - Nicksch, Tino
T1 - Schwachstellenanalyse in der Kommunikation von Medizingeräten am Beispiel von B. Braun Infusionspumpen
N2 - Der Einfluss von Technik in der Medizin wird immer deutlicher. Hierbei steigt auch im gleichen Maß die Bedrohung auf das Gesundheitswesen durch Cyberkriminalität. [1] Diese Arbeit umfasst eine Schwachstellenbetrachtung und Analyse der Kommunikation zweier B. Braun Infusionspumpen und dem dazugehörigen Konfigurationswerkzeug, der „Online-Suite“. Hierbei wurde ein Fokus auf vor allem drei Untersuchungsmethoden gelegt: 1. Ein Portscan mittels „Nmap“, welcher bereits erste, leicht einsehbare Informationen über die verwendeten Ports und Dienste aufdecken sollte. 2. Ein Schwachstellenscan durchgeführt mit „GVM/OpenVAS“, welcher die einzelnen Schwachstellen der Dienste und Software an Hand von einem „CVSS-Wert“ bewertet. 3. Eine Betrachtung des Netzwerkverkehrs in Wireshark, um den Aufbau der Kommunikation zu analysieren. Hierbei ergaben sich diverse Sicherheitsrisiken und Probleme. Diese können im schlimmsten Fall auch die Sicherheit des Patienten beeinflussen. Besonders häufig wurden hierbei Schwachstellen gefunden, welche durch veraltete und nicht weiter unterstützte Software bedingt waren.
KW - Vulnerability Scan
KW - Medical Devices
KW - Infusion Pumps
KW - Security
KW - Patient Safety
KW - Informationssicherheit
KW - Medizinisches Gerät
KW - Infusomat
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29024
ER -
TY - GEN
A1 - Lemke, Claudia
T1 - Umfragedesign "LLM-Readiness"
N2 - Das Umfragedesign "LLM-Readiness" - Gruppen- und Einzelumfrage unter Erstsemesterstudierenden der HWR Berlin im Wintersemester 2022/2023 - ergänzt die Publikation "Kritische Reflexion und Handlungsansätze zum Einsatz Generativer KI in der Wirtschaftsinformatik, welche zur Jahrestagung des AKWI im September 2023 eingereicht wird.
KW - Umfrage
KW - Forschungsplanung
KW - Umfragedesign
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29099
ER -
TY - THES
A1 - Jungclaus, Bjarne
T1 - Detektion von Ransomware in der IT-Systemlandschaft bei Betreibern Kritischer Infrastruktur
N2 - Ransomware-Angriffe auf Kritische Infrastrukturen, wie Energie- oder Wasserversorgung, treten immer häufiger auf und stellen eine große Bedrohung für die Betreiber und die Bevölkerung dar. Eine verlässliche und frühzeitige Erkennung dieser Angriffe ist somit ein wichtiger Bestandteil von IT-Sicherheitskonzepten.
Ziel dieser Arbeit ist die Klärung der Fragen, welche Methoden zur Erkennung von Ransomware eingesetzt werden und welche Indikatoren für Ransomware-Angriffe mithilfe eines Angriffserkennungssystems in einer nachgebildeten IT-KRITIS-Infrastruktur erkannt werden können.
Es wurden Methoden zur Detektion von Malware und Ransomware genauer betrachtet.
In einem Experiment wurde die Erkennung von Ransomware mithilfe eines Angriffserkennungssystems (Elastic Stack) untersucht. Das Ergebnis dieser Arbeit zeigt, dass die Erkennung sowohl mit allgemeinen Detektionsansätzen als auch mit auf Ransomware spezialisierten Methoden erfolgen kann.
Aus dem Experiment geht hervor, dass die Detektion von Ransomware-Angriffen mithilfe eines Angriffserkennungssystems in der Praxis erfolgreich ist. Indikatoren für RansomwareAngriffe werden sowohl auf Systemebene (Prozesse, Dateioperationen, Registry-Änderungen etc.) als auch auf Netzwerkebene (C2-Kommunikation, auffällige DNS-Anfragen, IPAdressen etc.) erkannt.
KW - IT-Sicherheit
KW - Kritische Infrastruktur
KW - Ransomware
KW - Detektion
KW - Informationssicherheit
KW - Datenverarbeitungssystem
KW - Computersicherheit
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29033
ER -
TY - THES
A1 - Monz, Johannes Stefan
T1 - Datenmodellinterne Revisionshistorie für nebenläufige Geschäftsprozesse am Fallbeispiel der Verwaltung von Studiengangscurricula
N2 - Die Versionierung von Daten ist ein hochkomplexes Problem, das viele verschiedene
Aspekte berücksichtigen muss. Daher ist in diesem Bereich bisher noch kein univer-
sell anwendbarer Ansatz beschrieben worden. Verschiedene Autoren haben sich an einer
Lösung versucht und Herangehensweisen für ihre eigenen Anwendungsfälle entwickelt.
In dieser Arbeit wird ein neuer Ansatz anhand eines Fallbeispiels vorgestellt. Der An-
satz zielt darauf ab, Daten- und Versionierungsstrukturen in einem relationalen Da-
tenmodell zu vereinigen und dabei eine einfache Integration von Geschäftsprozessen
zu ermöglichen. Insbesondere wird darauf geachtet, dass die Erzwingung des korrekten
Ablaufs von Geschäftsprozessen durch eine maschinelle Umsetzung derselben möglich
ist. Das Datenmodell beinhaltet eine vollständige Versionierungshistorie in Form eines
gerichteten zyklenlosen Graphen. Hiermit bietet es eine breit anwendbare Lösung zur
Datenversionierung, die zudem gut in bestehende Abläufe und Datensätze integrierbar
ist. In dieser Arbeit wird das kombinierte Datenmodell vorgestellt und anhand von ge-
nerischen Beispielen erläutert. Zudem wird die Funktionalität des Ansatzes anhand des
Fallbeispiels der Verwaltung der Studiengangscurricula des Fachbereichs Informatik und
Medien der Technischen Hochschule Brandenburg belegt. Hierbei wird auch die Integra-
tion von Geschäftsprozessen und die Nutzbarkeit in der tatsächlichen Datenverwaltung
dargestellt.
N2 - Versioning of Datasets is a highly complex problem whose solutions are required to take
many different aspects into account. As such, no universally applicable approach has
been published yet. Various authors have tried and developed solutions for their own
use cases. In this thesis, we present our approach based on our use case. The approach
shown here aims to unify structures for data persistence and version control into a single
data model and to allow a seamless integration of business processes. In particular, the
aim is to ensure that an enforcement of business processes via an automated execution
of said processes is easily possible. The data model delivers a complete version history
as a directed non-cyclic graph. As such, it offers a widely applicable solution for data
versioning in small systems, which is also easily integratable into existing data sets,
processes and structures. This thesis presents the combined data model and explains
its appliation using generic examples. Afterwards, the funcionality of the approach in
a real-life setting is demonstrated with our use case of managing the curricula of the
Department of Computer Science and Media at the Brandenburg University of Applied
Sciences. In this, the integration of business processes and the usage in actual data
mangement is also demonstrated.
KW - Datenverarbeitungssystem
KW - Versionsverwaltung
KW - Relationale Datenbank
KW - Prozesskette
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29380
ER -
TY - THES
A1 - Nowak, Max
T1 - Integration von Endnutzer Netzwerkgeräten in zentralisierte Protokoll Management Systeme am Beispiel der FRITZ!Box
N2 - Diese Bachelorarbeit untersucht die Einbindung eines typischen Endnutzer Netzwerkgerätes in ein bestehendes Protokollierungssystem. Aufgrund des erhöhten Anteils an Mitarbeitern im Homeoffice in deutschen Firmen sind die Heimnetzwerke ein bedeutend wichtigerer Bestandteil der Firmensicherheit und es soll untersucht werden, wie übliche Heimnetzwerkgeräte in die Sicherheitsstrukturen der Firmen eingebunden werden können.
Zu diesem Zweck wird ein Proof-of-Concept basierend auf den Technologien TR-064, zur Kommunikation mit der FRITZ!Box und Syslog, zur Kommunikation mit einem Protokollierungssystem entwickelt.
Anhand dieses Prototypen lässt sich feststellen, dass eine solche Einbindung zwar einfach umzusetzen ist, aber auf dieser keine effektive Überwachung aufgebaut werden kann. Die Ursache dafür ist der Umstand, dass TR-064 nur einen Bruchteil der Logdaten von der FRITZ!Box zurücksendet.
KW - Computersicherheit
KW - Informationssicherheit
KW - Logdatei
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29191
ER -
TY - GEN
A1 - Weber, Simon
A1 - Stein, Stefan
A1 - Pilgermann, Michael
A1 - Schrader, Thomas
T1 - Attack Detection for Medical Cyber- Physical Systems - The Visualization
N2 - Attack Detection for Medical Cyber-Physical Systems -
The Visualization
KW - Detection
KW - IDS
KW - intrusion prevention
KW - medical cyber-physical systems
KW - medical CPS
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29142
ER -
TY - BOOK
A1 - Kraska, Martin
T1 - Technisches Rechnen mit SMath : Matrizen, Diagramme, Datenverarbeitung
KW - SMath
KW - Software
KW - Anleitung
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29486
PB - Technische Hochschule Brandenburg
CY - Brandenburg
ER -
TY - BOOK
A1 - Kraska, Martin
T1 - Technisches Rechnen mit SMath : Erste Schritte
KW - SMath
KW - Software
KW - Anleitung
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29479
PB - Technische Hochschule Brandenburg
CY - Brandenburg
ER -
TY - THES
A1 - Dalitz, Franz
T1 - Implementierung eines Stacks zum Erzeugen, Verarbeiten und Visualisieren von Telemetriedaten für ein Microservice basiertes System
N2 - Einsicht in die Abläufe und Leistung heutiger Software und verteilter Systeme zu erlangen, wird durch stetig steigende Komplexität zunehmend erschwert. Die Firma Peterson Technologies GmbH implementierte zur Linderung dieser Problematik ein internes Telemetriesystem. Ziel dieser Arbeit ist es, das System auf Wunsch der Firma durch ein neues zu ersetzen, um so die Überwachung zu verbessern und aktuellere Software zu verwenden. Nach einer Untersuchung des vorherigen Systems werden Prioritäten festgelegt, welche die spätere Nutzung, Instandhaltung und Erweiterung des neuen Systems erleichtern sollen. Darauf folgen die Planung seiner Architektur, die Auswahl und Implementierung der Software und schließlich das Erzeugen einer einfachen Dokumentation. Der resultierende Telemetriestack ist funktionstüchtig und erfüllt die Vorstellungen der Firma. Dennoch weist er einige Probleme, wie beispielsweise eine hohe CPU Belastung auf, welche zusammen mit Möglichkeiten der Verbesserung und Erweiterung abschließend betrachtet werden.
KW - Telemetrie
KW - Distributed Tracing
KW - Microservices
KW - Grafana
KW - OpenTelemetry
KW - Telemetrie
KW - Mikroservice
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29418
CY - Brandenburg an der Havel
ER -
TY - THES
A1 - Blauert, Derk-Janko
T1 - Bewertung des Potentials von Network Access Control (NAC) für die Netzwerksicherheit in modernen IT-Umgebungen mittels vergleichender Betrachtung der beiden Produkte PacketFence und macmon
N2 - In der heutigen digitalisierten Welt spielt die Sicherheit von IT-Infrastrukturen eine
entscheidende Rolle. Diese Bachelorarbeit untersucht das Potenzial von Network
Access Control (NAC) als eine IT-Lösung zur Verbesserung der Netzwerksicherheit in
modernen IT-Umgebungen. Dabei steht die Zugriffskontrolle von Personen und
Geräten im Vordergrund. Damit soll erreicht werden, dass unautorisierter Zugriff zum
Netzwerk verhindert wird. Es werden die Begrifflichkeiten, Funktionsweise und
potenzielle Angriffsvektoren von NAC untersucht. Des Weiteren werden die jeweiligen
Funktionen der NAC-Produkte macmon und der Open-Source Lösung PacketFence
gegenübergestellt. Im praktischen Teil der Arbeit werden dann die vorgestellten
Angriffsvektoren an einem Test-Netzwerk durchgeführt und analysiert.
Die Arbeit zeigt, dass NAC eine wichtige Komponente in der Zugriffskontrolle für eine
moderne IT-Infrastruktur ist. Während einige Angriffe auf das Test-Netzwerk
abgewehrt werden konnten, war es dennoch möglich, sich als Angreifer am Netzwerk
anzumelden. NAC ist ein unerlässliches Tool für größere IT-Infrastrukturen, jedoch
erfordert eine korrekte Konfiguration und effektive Nutzung von NAC ein
umfangreiches Wissen über die verschiedenen Aspekte und Themenbereiche der
Netzwerksicherheit.
N2 - In today's digitalized world, the security of IT infrastructures plays a vital role. This
bachelor's thesis examines the potential of Network Access Control (NAC) as an IT
solution to enhance network security in modern IT enviroments. The focus is on access
control for individuals and devices. The goal is to prevent unauthorized network access.
The terminology, functionality, and potential attack vectors of NAC are explored.
Furthermore, the respective functions of the NAC products macmon and the open-
source solution PacketFence are compared. In the practical part of the thesis, the
introduced attack vectors are tested on a lab network and analyzed.
The study shows that NAC is a crucial component in access control for modern IT
infrastructure. While some attacks on the test network were successfully prevented, it
was still possible for an attacker to gain access to the network. NAC is an indispensable
tool for larger IT infrastructures. However proper configuration and effective use of
NAC require extensive knowledge of the various aspects and topics of network security.
KW - Informationssicherheit
KW - Datenverarbeitungssystem
KW - Computersicherheit
Y1 - 2023
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29514
PB - Technische Hochschule Brandenburg
CY - Brandenburg an der Havel
ER -
TY - RPRT
A1 - Schugardt, Alexander
T1 - Untersuchung der Rotorfestigkeit von permanenterregten Synchronmaschinen mit vergrabenen Magneten
N2 - Diese Projektarbeit behandelt die mechanische Simulation der Rotoren von permanenterregten Synchronmaschinen für den Festigkeitsnachweis. Hierzu wird die Finite-Elemente-Methode mit dem Programm CalculiX verwendet. Als Beispiel wird der Elektromotor des Toyota Prius II im Detail betrachtet. Hierbei werden die unterschiedlichen Lasten modelliert, dazu zählen neben der Zentrifugalkraft auch der Innendruck durch eine Presspassung sowie die elektromagnetischen Kräfte. Für die Modellierung von Kräften auf der Rotoroberfläche wird eine Methodik zur Umsetzung in CalculiX entwickelt und anhand eines Beispielmodells demonstriert. Der angestrebte Festigkeitsnachweis kann im Rahmen dieser Arbeit erbracht werden. Weiterhin wird gezeigt, dass der Einfluss der elektromagnetischen Kräfte im Arbeitspunkt mit der höchsten Drehzahl sehr gering ausfällt. Insgesamt bietet diese Arbeit die Grundlagen für mechanische Modellierungen von Rotoren unter Berücksichtigung aller Kräfte. Dies kann direkt auf andere Elektromotoren angewendet werden.
KW - Rotor
As the consortium who published this initial 2021-study on steganography patterns, in this paper we present the first comprehensive pattern-based taxonomy tailored to fit all known domains of steganography, including smaller and emerging areas, such as filesystem steganography and cyber-physical systems steganography. Besides, to make our contribution more effective and promote the use of the taxonomy to advance research on steganography, we also provide a thorough tutorial on its utilization.
Our pattern collection is available at https://patterns.ztt.hs-worms.de.
Y1 - 2023 U6 - https://doi.org/10.36227/techrxiv.20215373.v1 ER - TY - GEN A1 - Stockhausen, Pablo A1 - Johannsen, Andreas A1 - Maurer, Robert T1 - Machine-Learning Verfahren für eine nachhaltige Letzte-Meile-Logistik N2 - Dieser Beitrag entwickelt ein Konzept zur praktischen Umsetzung eines Machine- Learning Verfahrens zum Lösen von Vehicle Routing Problemen im Kontext einer nachhaltigen “Letzte-Meile”-Logistik, welches durch einen Prototyp umgesetzt und getestet wurde. Der Prototyp basiert auf dem “Reinforcement Learning”-System und verwendet als Algorithmus “REINFORCE mit Baseline”. In einer Vergleichsanalyse wurde der Prototyp mit dem bekannten Vertreter Google-OR, anhand von zwei Anwendungsszenarien, verglichen. Der Prototyp überzeugt dabei in der Laufzeit und dem Automatismus. Es konnte festgestellt werden, dass eine Verwendung von Lernenden-Systemen für das Vehicle Routing Problem sich bei nur bei einem größeren Stoppvolumen und einer erweiterten IT-Infrastruktur empfiehlt. Y1 - 2023 ER - TY - CHAP A1 - Stockhausen, Pablo A1 - Johannsen, Andreas A1 - Maurer, Robert ED - Krupka, Daniel ED - Federrath, Hannes ED - Demmler, Daniel T1 - Konzeption eines Machine-Learnings-Verfahrens zum Lösen von Green Vehicle Routing Problemen T2 - Konferenz: Informatik 2022, Lecture Notes in Informatics (LNI), Bonn, 2022/ Konferenzband: Informatik 2022 Fachtagung vom 26.-30. September 2022, Hamburg/ Band: P-326 Y1 - 2023 SN - 978-3-88579-720-3 SP - 885 EP - 897 PB - Gesellschaft für Informatik CY - Bonn ER - TY - JOUR A1 - Braubach, Lars A1 - Jander, Kai T1 - 1. Introduction JF - International Journal of Parallel, Emergent and Distributed Systems Y1 - 2023 U6 - https://doi.org/10.1080/17445760.2023.2251386 SN - 1744-5779 VL - 38 IS - 6 SP - 459 EP - 460 PB - Taylor & Francis ER - TY - JOUR A1 - Hasche, Eberhard A1 - Karaschewski, Oliver A1 - Creutzburg, Reiner T1 - iPhone12 imagery in scene-referred computer graphics pipelines JF - Electronic Imaging N2 - With the release of the Apple iPhone 12 Pro Max in 2020, various features were integrated that make it attractive as a recording device for scene-related computer graphics pipelines. The captured Apple RAW images have a much higher dynamic range than the standard 8-bit images. Since a scene-based workflow naturally has an extended dynamic range (HDR), the Apple RAW recordings can be well integrated. To correctly integrate the iPhone 12 pro Apple RAW data into a scene-related workflow, two command-line software solutions, among others, are dcraw and rawtoaces. In this paper, we concentrate on dcraw. dcraw offers the possibility to export RAW images directly to ACES2065-1. Different images recorded under different lighting conditions are examined to determine which options for the dcraw development produce the best results. Images from five different lighting situations like D65, D60, D55, D50, and 2980K, are examined. The DNG files are developed using different methods within dcraw. The values of the recorded ColorChecker24 patches are compared to reference values derived from BabelColor [1] and ACES [2]. Y1 - 2023 U6 - https://doi.org/10.2352/EI.2023.35.3.MOBMU-350 SP - 350-1 EP - 350-14 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Jaster, Daniel A1 - Creutzburg, Reiner A1 - Hasche, Eberhard T1 - A qualitative study of LiDAR technologies and their application areas JF - Electronic Imaging N2 - In this work, the most relevant 3D LiDAR technologies and their applications in 2022 were investigated. For this purpose, applications of LiDAR systems were classified into the typical application areas "3D modeling", "smart city", "robotics", "smart automotive" and "consumer goods". The investigation has shown that neither "mechanical" LiDAR technologies, nor so-called solid-state LiDAR technologies, nor "hybrid" LiDAR technologies can be evaluated as optimal for the typical application areas. In none of the application areas could all of the elaborated requirements be met. However, the "hybrid" LiDAR technologies such as sequential MEMS LiDAR technology and sequential flash LiDAR technology proved to be among the most suitable for most typical application areas. However, other technologies also tended to be suitable for individual typical application areas. Finally, it was found that several of the LiDAR technologies investigated are currently equally suitable for some typical application areas. To evaluate the suitability, concrete LiDAR systems - of different technologies and properties - were compared with the specific requirements of exemplary applications of an application area. The results of the investigation provide an orientation as to which LiDAR technology is promising for which application area. Y1 - 2023 U6 - https://doi.org/10.2352/EI.2023.35.3.MOBMU-368 VL - 35 SP - 368-1 EP - 368-15 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Maleki, Maniya A1 - Mohammadi, Mahdieh T1 - Velocity and pressure functions of an oscillating flow in a circular Hele-Shaw cell JF - Iranian Journal of Physics Research N2 - In this study, we have investigated the form of velocity and pressure functions of a fluid oscillating between two parallel glass sheets that form a circular Hele-Shaw cell. The flow has been considered to be radial, incompressible and laminar. The time-dependent Navier-Stokes equation has been solved in cylindrical coordinates using Fourier transform, and the oscillating flow velocity across the thickness of the cell has been obtained at different times. The flow velocity function in the unsteady state is related to the vertical component of the coordinates in the form of parabolic functions and also to the inverse of the radial component. The time dependence appears as a simple harmonic with a frequency equal to the oscillation frequency. The velocity of the flow is maximum at the middle of the cell along its height and gradually decreases from the middle towards the top or bottom plane and reaches zero. Pressure does not depend on the height and changes logarithmically with the radius. The dependence of pressure on time is also a simple harmonic with the external frequency, but it has a phase shift with respect to the velocity. Y1 - 2023 U6 - https://doi.org/10.47176/ijpr.22.1.81304 VL - 22 IS - 1 SP - 113 EP - 120 PB - Physics Society of Iran ER - TY - JOUR A1 - Lachowski, Krzysztof A1 - Hammermeister, Florian A1 - Halenz, Bastian A1 - Lieckefett, Florian A1 - Götze, Thomas A1 - Prill, Robert A1 - Becker, Roland T1 - The Patellostabilometer: A New Device for Quantification of Mediolateral Patella Displacement JF - Sensors N2 - Mediolateral patella displacement is of interest for diagnostics and clinically relevant research questions. Apart from manual testing, no standardized method is currently available. Proper quantification of patella mobility is necessary to better understand pathologies at the patellofemoral joint. Patella mobility was assessed in 25 healthy individuals using a Patellostabilometer, a new prototype instrument for quantification of the mediolateral patella displacement. The participants underwent measurements of the mediolateral displacement three times using the Patellostabilome- ter. A maximal force of 10 N was applied for patella movement. Additionally, leg length and circumference of the knee, upper- and lower-leg were measured. Lateral patella displacement of 18.27 ± 3.76 mm (range 15.85–20.64 mm, interquartile range (IQR) of 4.79) was measured. The medial patella displacement showed 24.47 ± 6.59 mm (range 19.29–29.76 mm, IQR of 10.47). The test–retest measurement error was 2.32 ± 1.76 mm (IQR of 2.38 mm), with five outliers. There was greater test–retest variability between the measurements of the medial displacement compared to the lateral one. The test–retest variability reached 7% of the patella displacement. Other parameters provided no significant correlations. Based on the natural patellofemoral mobility, a precise and clinically relevant quantification of patella mobility is allowed. Y1 - 2023 UR - https://www.mdpi.com/1424-8220/23/3/1274 U6 - https://doi.org/https://doi.org/10.3390/s23031274 IS - 23 (3) PB - MDPI ER - TY - JOUR A1 - Rizun, Nina A1 - Revina, Aleksandra A1 - Edelmann, Noella T1 - Application of Text Analytics in Public Service Co-Creation: Literature Review and Research Framework JF - DG.O 2023: The 24th Annual International Conference on Digital Government Research N2 - The public sector faces several challenges, such as a number of external and internal demands for change, citizens' dissatisfaction and frustration with public sector organizations, that need to be addressed. An alternative to the traditional top-down development of public services is co-creation of public services. Co-creation promotes collaboration between stakeholders with the aim to create better public services and achieve public values. At the same time, data analytics has been fuelled by the availability of immense amounts of textual data. Whilst both co-creation and TA have been used in the private sector, we study existing works on the application of Text Analytics (TA) techniques on text data to support public service co-creation. We systematically review 75 of the 979 papers that focus directly or indirectly on the application of TA in the context of public service development. In our review, we analyze the TA techniques, the public service they support, public value outcomes, and the co-creation phase they are used in. Our findings indicate that the TA implementation for co-creation is still in its early stages and thus still limited. Our research framework promotes the concept and stimulates the strengthening of the role of Text Analytics techniques to support public sector organisations and their use of co-creation process. From policy-makers' and public administration managers' standpoints, our findings and the proposed research framework can be used as a guideline in developing a strategy for the designing co-created and user-centred public services. Y1 - 2023 UR - https://dl.acm.org/doi/10.1145/3598469.3598471 U6 - https://doi.org/10.1145/3598469.3598471 SP - 12 EP - 22 PB - Association for Computing Machinery ER - TY - JOUR A1 - Guterding, Daniel T1 - Sparse Modeling Approach to the Arbitrage-Free Interpolation of Plain-Vanilla Option Prices and Implied Volatilities JF - Risks N2 - We present a method for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, which is based on a system of integral equations that relates terminal density and option prices. Using a discretization of the terminal density, we write these integral equations as a system of linear equations. We show that the kernel matrix of this system is, in general, ill-conditioned, so that it cannot be solved for the discretized density using a naive approach. Instead, we construct a sparse model for the kernel matrix using singular value decomposition (SVD), which allows us not only to systematically improve the condition number of the kernel matrix, but also determines the computational effort and accuracy of our method. In order to allow for the treatment of realistic inputs that may contain arbitrage, we reformulate the system of linear equations as an optimization problem, in which the SVD-transformed density minimizes the error between the input prices and the arbitrage-free prices generated by our method. To further stabilize the method in the presence of noisy input prices or arbitrage, we apply an 𝐿1-regularization to the SVD-transformed density. Our approach, which is inspired by recent progress in theoretical physics, offers a flexible and efficient framework for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, without the need to explicitly specify a stochastic process, expansion basis functions or any other kind of model. We demonstrate the capabilities of our method in a number of artificial and realistic test cases. Y1 - 2023 UR - https://www.mdpi.com/2227-9091/11/5/83 U6 - https://doi.org/https://doi.org/10.3390/risks11050083 IS - 11 (5) PB - MDPI AG ER - TY - JOUR A1 - Stannarius, Ralf A1 - Harth, Kirsten T1 - The structure of disintegrating defect clusters in smectic C freely suspended films JF - Soft Matter N2 - Disclinations or disclination clusters in smectic C freely suspended films with topological charges larger than one are unstable. They disintegrate, preferably in a spatially symmetric fashion, into single defects with individual charges of +1, which is the smallest positive topological charge allowed in polar vector fields. While the opposite process of defect annihilation is well-defined by the initial defect positions, disintegration starts from a singular state and the following scenario including the emerging regular defect patterns must be selected by specific mechanisms. We analyze experimental data and compare them with a simple model where the defect clusters adiabatically pass quasi-equilibrium solutions in one-constant approximation. It is found that the defects arrange in geometrical patterns that correspond very closely to superimposed singular defect solutions, without additional director distortions. The patterns expand by affine transformations where all distances between individual defects scale with the same time-dependent scaling factor proportional to the square-root of time. Y1 - 2023 UR - https://pubs.rsc.org/en/content/articlelanding/2023/sm/d3sm00808h U6 - https://doi.org/https://doi.org/10.1039/d3sm00808h IS - 19 SP - 6109 EP - 6115 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Xu, Han-Xiang A1 - Shimizu, Makoto A1 - Guterding, Daniel A1 - Otsuki, Junya A1 - Jeschke, Harald O. T1 - Pressure evolution of electronic structure and magnetism in the layered van der Waals ferromagnet CrGeTe3 JF - Physical Review B N2 - Layered van der Waals ferromagnets, which preserve their magnetic properties down to exfoliated monolayers, are fueling an abundance of fundamental research and nanoscale device demonstration. CrGeTe3 is a prime example of this class of materials. Its temperature-pressure phase diagram features an insulator-to-metal transition and a significant increase in ferromagnetic Curie-Weiss temperatures upon entering the metallic state. We use density functional theory to understand the magnetic exchange interactions in CrGeTe3 at ambient and elevated pressures. We calculate Heisenberg exchange couplings, which provide the correct ferromagnetic ground state and explain the experimentally observed pressure dependence of magnetism in CrGeTe3. Furthermore, we combine density functional theory with dynamical mean-field theory to investigate the effects of electronic correlations and the nature of the high-pressure metallic state in CrGeTe3. Y1 - 2023 U6 - https://doi.org/https://doi.org/10.1103/PhysRevB.108.125142 IS - Vol. 108 PB - American Physical Society ER - TY - JOUR A1 - Klopp, Christoph A1 - Trittel, Torsten A1 - Harth, Kirsten A1 - Stannarius, Ralf T1 - Coalescence of biphasic droplets embedded in free standing smectic A films JF - Soft Matter N2 - We investigate micrometer-sized flat droplets consisting of an isotropic core surrounded by a nematic rim in freely suspended smectic A liquid-crystal films. In contrast to purely isotropic droplets which are characterized by a sharp edge and no long-range interactions, the nematic fringe introduces a continuous film thickness change resulting in long-range mutual attraction of droplets. The coalescence scenario is divided in two phases. The first one consists in the fusion of the nematic regions. The second phase involves the dissolution of a thin nematic film between the two isotropic cores. The latter has many similarities with the rupture of thin liquid films between droplets coalescing in an immiscible viscous liquid. Coalescence of biphasic droplets in free-standing smectic films is controlled in part by the rupture of a thin nematic membrane separating the isotropic droplet cores. Y1 - 2023 UR - https://pubs.rsc.org/en/content/articlelanding/2024/sm/d3sm01549a U6 - https://doi.org/10.1039/d3sm01549a SN - 1744-683X VL - 20 IS - 5 SP - 1036 EP - 1046 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Nagel, Michael A1 - Schminder, Christian ED - Erich Schmidt Verlag, T1 - Sachbezogenes Verhandeln als Methode im Zielbildungsprozess von innovationsorientierten Public Private Partnerships. JF - Ideen- und Innovationsmanagement Y1 - 2023 U6 - https://doi.org/10.37307/j.2198-3151.2022.02.07 SN - 2198-3151 IS - 2 SP - 72 EP - 77 PB - Erich Schmidt Verlag GmbH & Co ER - TY - JOUR A1 - Johannsen, Andreas T1 - ERP-Einführung - Bewertung einer Standardimplementierungsmethode für SAP Business One JF - ERP Management Y1 - 2023 SN - 1860-6725 SP - 19 EP - 22 PB - GITO Verlag ER - TY - JOUR A1 - Kuznetsov, Arthur A1 - Frorip, Aleksandr A1 - Sünter, Alar A1 - Kasvand, Nensi A1 - Korsakov, Vadim A1 - Konoplev, Georgii A1 - Stepanova, Oksana A1 - Rusalepp, Linda A1 - Anton, Dea A1 - Püssa, Tõnu A1 - Roasto, Mati A1 - Abramova, Liubov A1 - Kozin, Andrey A1 - Toom, Lauri A1 - Hirsch, Sören A1 - Mukhin, Nikolay ED - mdpi, T1 - Fast Protein and Metabolites (Nucleotides and Nucleosides) Liquid Chromatography Technique and Chemical Sensor for the Assessment of Fish and Meat Freshness JF - Chemosensors N2 - Fast protein and metabolite liquid chromatography (FPLMC) was introduced years ago to enable the easy separation of high-molecular compounds such as proteins from small molecules and the identification of the low-molecular substances. In this paper, the method is applied for the rapid evaluation of freshness and monitoring the aging of animal meat and fish. A novel chromatographic sensor was developed with a deep UV LED-based photometric detection unit (255–265 nm), an original flow cuvette and registration scheme; the processing of a chromatogram with the sensor takes approximately 15 min. Strict isochronism between the elution of ATP metabolites, mainly hypoxanthine (Hx) and inosine monophosphate (IMP), and the time of maturation of meat or fish, was discovered. A new freshness index H* = [Hx]/[IMP] was introduced, which is proportional to the instrumental delay time in the FPMLC chromatograms: the H* index < 0.5 indicates the presence of inosine monophosphate (IMP) and the high quality of the meat or fish. Reasonably strong correlations were revealed between data obtained by FPMLC and total volatile basic nitrogen TVB-N (for fish) or volatile fatty acids VFA (for meat) content. Moreover, putative nucleotide salvage and an increase in the concentration of IMP were observed in fish after heat treatment using the FPMLC sensor and NMR technique. Y1 - 2023 UR - https://www.mdpi.com/2227-9040/11/1/69 U6 - https://doi.org/10.3390/chemosensors11010069 SN - 2227-9040 IS - 1/2023 / Band 11 PB - MDPI ER - TY - JOUR A1 - Mikhailov, Ivan Igorevich A1 - Lamkin, I. A. A1 - Degterev, Aleksandr A1 - Degtereva, Mariya A1 - Pavlova, Marina A1 - Kurachkina, Marharyta A1 - Tarasov, S. A. A1 - Kuzmina, Ulyana T1 - Фоточувствительные структуры с каскадными концентраторами излучения на основе коллоидных квантовых точек халькогенидов металлов JF - Journal of the Russian Universities Radioelectronics N2 - The problem of increasing the efficiency of existing photodetectors and creating their new types attracts much research attention. Among new photodetector types are photosensitive structures based on cascade concentrators, whose operational principle involves the absorption of optical radiation followed by its reemission at a longer wavelength and radiation concentration onto a highly efficient small-area photodetector. The absorption and re-emission spectra of each cascade layer depend on the characteristics of the material used. Сolloidal quantum dots are among the most promising materials for cascade layers due to their manufacturing technology, which provides for accurate control over the photoluminescence maximum position. It seems highly relevant to develop and to study photosensitive structures with cascade concentrators of various shapes based on CdS, CdSe/ZnS, and PbS colloidal quantum dots. Aim . To develop photosensitive structures with a wide-range sensitivity spectrum based on concentrators containing arrays of metal chalcogenide CQDs and to study their characteristics. Materials and methods . Cascade photosensitive structures were manufactured based on layers made of polymethyl methacrylate and layers of colloidal quantum dots embedded in a polystyrene matrix. Results . Three-layer concentrators were manufactured with different colloidal quantum dots in each concentrator layers. A 22 % increase in the output power was observed for a three-layer cascade structure based on different cascade layer materials compared to a similar structure using a single layer concentrator. Conclusion . The conducted studies showed an increase in the efficiency of photosensitive structures with a cascade concentrator based on colloidal quantum dots of various types (CdS, CdSe/ZnS, and PbS) in the cascade layers. T2 - Photo-sensitive Structures with Cascade Radiation Concentrators Based on Colloidal Quantum Dots of Metal Chalcogenides Y1 - 2023 U6 - https://doi.org/10.32603/1993-8985-2023-26-2-78-88 SN - 2658-4794 VL - 26 IS - 2 SP - 78 EP - 88 PB - Saint Petersburg Electrotechnical University ER - TY - RPRT A1 - Reimann, Christoph A1 - Shetty, Darshan A1 - Klecha, Dominik A1 - Munaf, Jasmin A1 - Boateng, Newell T1 - Absence of external resources in Germany BT - An analysis about the deglobalization of resources in Germany based on the case studies oil and gas and rare earths N2 - This scientific paper deals with the question of to what extent the deglobalization of raw materials will have an impact on Germany. For this purpose, a general understanding of the terms “globalization” and “deglobalization” will be provided. In addition, the drivers and challenges of (de)globalization are explained in more detail. The question was then examined based on specific case studies, which are decisive for today's prosperity and are predominantly imported. This includes gases, oils, and rare earths. The paper distinguishes between the effects of a loss of these resources on Germany, if the deglobalization takes place slowly and planned or unplanned and fast. The effects are then considered at three different levels: at the government level, at the corporate level, and at the population level. At the corporate level, the focus was primarily on the largest German industries. Each of the case studies ends with possible hypothetical scenarios that do not have to happen but could happen in the worst case. The scenarios show how bad things can get and provide an answer to the scientific question of how deglobalization in the case study could affect Germany. KW - Natürliche Ressourcen KW - Globalisierung KW - Fallstudie Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28928 ER - TY - JOUR A1 - Baecker, Christoph A1 - Alabbadi, Osama A1 - Yogiputra, Georgius Pradipta A1 - Tien Dung, Nguyen T1 - Threats provided by artificial intelligence that could disrupt the democratic system N2 - This research paper examines the potential consequences of AI technology on democratic systems. The study focuses on two main areas: the weakening of the media and the emergence of "smart dictatorship." The paper examines the ways in which AI can be used to supervise, manipulate, and frustrate the media, thereby weakening its role as a check on government and corporate power. The study also explores how AI technology can be used to create an "omnidirectional monitoring" society, where individuals are constantly monitored and controlled through the use of "panopticon" techniques and "social bots". This can lead to the emergence of a "postdemocratic" society, characterized by growing inequality, dehumanization, and the manipulation of information on online media platforms. The research methodology adopted in the study is qualitative, using expert interviews with three experts who discussed the overall use of AI and its disruptive effects on democracy, such as the creation of fake news, filter bubbles, and algorithm bias. In conclusion, this research highlights the need for increased awareness and regulation of AI technology to ensure its responsible use and to protect democratic values. KW - Künstliche Intelligenz KW - Demokratie KW - Wertordnung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28988 PB - Technische Hochschule Brandenburg ER - TY - THES A1 - Garzón Gil, Zahira A1 - Ingabire, Noella Arlette A1 - Kibathi, Patrick T1 - Disruption of Africa's education systems and economic development due to overpopulation N2 - Education lies at the foot of economic growth and human development. However, an increase in population tends to put a strain on existing education systems, especially in Africa where most countries are characterized by slow economic development, rapid population growth rates and a median age just shy of 20 years. Due to the slow rate of economic growth, many African countries lack the financial capability to provide proper education for their ever-growing populations or even already overpopulated regions, many of which have people who have reached the appropriate school-going age. This leads to a series of disruptive impacts on the education systems resulting in a people who are poorly or improperly educated, and thus are not equipped with the necessary skills required for the vast technical, professional and ever modernizing high-skill job markets such as construction, economic and technical professions, teaching occupations and so on, all of which drive economic growth and development. Therefore, we can see that rapid population growth, if left unchecked, may lead to overpopulation scenarios which could have a negative disruptive impact on education and human development, both of which are important factors necessary for economic growth. Key words: Population, education, Africa, poverty, economy, development. KW - Übervölkerung KW - Afrika KW - Armut KW - Demographie Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28909 EP - 21 Seiten ER - TY - CHAP A1 - Weretecki, Patrick A1 - Kristal, Samuel T1 - Brand Value Co-Creation bei der Deutschen Telekom- Das (neu) entdeckte Potential der regionalen Marketingkommunikation T2 - Marketing-Management : Konzepte - Instrumente - Unternehmensfallstudien / Philip Kotler, Kevin Lane Keller, Alexander Chernev, Marc Oliver Opresnik ; Übersetzung: Anke Harrer, Oberschleißheim - 16. aktualisierte Aufl. - München: Pearson, 2023 Y1 - 2024 SN - 978-3-86894-443-3 SP - 363 EP - 368 PB - Pearson ER - TY - CHAP A1 - Markgraf, Klaus T1 - Entwicklung eines Tools zur spezifischen, lastgangbasierten Eigenverbrauchsoptimierung mittels PV-Leistungsprognose T2 - Konferenz: 18. Symposium Energieinnovation, 2024, Graz/Austria N2 - The German government's initiative to cover 80% of the gross electricity supply with renewable energies by 2050 brings considerable ecological benefits, but also poses several challenges. One of these challenges is the growing number of photovoltaic systems (PV systems), which, due to their high feed-in power, already pose a risk to the security of the electricity distribution grid during long periods of sunny weather. To counteract this, active research is being carried out in the field of PV power forecasting. This research is primarily aimed at providing the grid operator with a predicted power output, which enables a longer planning horizon and thus increases the operational grid security. However, the considerable annual electricity consumption of private households and the increasing spread of PV systems for self-consumption show that the energy behavior of households, especially self-consumption, also influences grid security. Additionally, households have an incentive to boost their self-consumption because the cost of drawing each kilowatt-hour from the grid is substantially higher than the compensation received for injecting an equivalent amount of energy back into the grid. However, as of now, there is no software available that easily enables households to tailor the usage patterns of their electrical appliances according to a photovoltaic (PV) forecast. The project described here aims to close this gap by creating such software. Various PV forecasting models are used and tested for their suitability for this purpose. A self-generated optimization process is implemented in this project to optimize the consumer configuration based on the PV forecasts. The here-developed tool enables the user to enter parameters for his PV system and the specific load profiles of his electrical appliances. Based on this data, the optimization algorithm determines a consumption plan with a forecast horizon until the end of the next day that maximizes the user's self-consumption. To validate the tool, the optimization process is carried out over a period of 60 days using a predefined scenario and the results are compared with a scenario in which the electrical appliances are intuitively operated at midday. The analysis of these results ultimately shows the potential impact of such a tool on the economic efficiency of private households and the supply stability. Y1 - 2024 U6 - https://doi.org/10.6084/m9.figshare.25610976 SP - 1 EP - 10 ER - TY - JOUR A1 - Ayalon, Inbal A1 - Avisar, Dror A1 - Jechow, Andreas A1 - Levy, Oren T1 - Corals nitrogen and carbon isotopic signatures alters under Artificial Light at Night (ALAN) JF - The Science of The Total Environment N2 - This study examines the impact of Artificial Light at Night (ALAN) on two coral species, Acropora eurystoma and Pocillopora damicornis, in the Gulf of Aqaba/Eilat Red Sea, assessing their natural isotopic responses to highlight changes in energy and nutrient sourcing due to sensory light pollution. Our findings indicate significant disturbances in photosynthetic processes in Acropora eurystoma, as evidenced by shifts in δ13C values under ALAN, pointing to alterations in carbon distribution or utilization. In Pocillopora damicornis, similar trends were observed, with changes in δ13C and δ15N values suggesting a disruption in its nitrogen cycle and feeding strategies. The study also uncovers species-specific variations in heterotrophic feeding, a crucial factor in coral resilience under environmental stress, contributing to the corals' fixed carbon budget. Light measurements across the Gulf demonstrated a gradient of light pollution which possess the potential of affecting marine biology in the region. ALAN was found to disrupt natural diurnal tentacle behaviors in both coral species, crucial for prey capture and nutrient acquisition, thereby impacting their isotopic composition and health. Echoing previous research, our study underscores the need to consider each species' ecological and physiological contexts when assessing the impacts of anthropogenic changes. The findings offer important insights into the complexities of marine ecosystems under environmental stress and highlight the urgency of developing effective mitigation strategies. Y1 - 2024 U6 - https://doi.org/10.1016/j.scitotenv.2024.170513 IS - 920 PB - Elsevier ER - TY - JOUR A1 - Trittel, Torsten A1 - Puzyrev, Dmitry A1 - Stannarius, Ralf T1 - Platonic solids bouncing on a vibrating plate JF - Physical Review E N2 - The energy transfer between bouncing particles and rigid boundaries during impacts is crucially influenced not only by restitution coefficients of the material but also by particle shapes. This is particularly important when such particles are mechanically agitated with vibrating plates. Inertial measurement units are able to measure all acceleration and rotational velocity components of an object and store these data for subsequent analysis. We employ them to measure the dynamics of cubes and icosahedra on vibrating plates to study the efficiency of energy transfer into the individual degrees of freedom (DOFs) of the excited object. The rotational DOFs turn out to be much less excited than the vertical translational motion. Most remarkably, there is only little difference between the two Platonic solids in both the absolute energies and the energy partition ratios. Y1 - 2024 U6 - https://doi.org/10.1103/PhysRevE.109.034903 VL - 109 IS - 3 PB - American Physical Society ER - TY - JOUR A1 - Kristal, Samuel A1 - Weretecki, Patrick T1 - Social first? Not always! Brand co-creation through regional marketing at Deutsche Telekom JF - Transfer: Zeitschrift für Kommunikation & Markenmanagement N2 - Deutsche Telekom, one of the world's leading integrated telecommunications companies, has recently shifted its focus in event marketing to prioritize more personal co-creational communication on regional occasions, rather than largescale events. This paper outlines the three-part LAW-principle that Deutsche Telekom follows in its brand communication in Germany, providing examples for each of the three pillars. The co-creation resulting from brand communication is changing the role of marketing and brand practitioners. They are now required to negotiate with various stakeholders. Y1 - 2024 VL - 70 IS - 1 SP - 67 EP - 71 PB - New Business Verlag ER - TY - JOUR A1 - Catalano, Francesco A1 - Nasello, Laura A1 - Guterding, Daniel T1 - Quantum Computing Approach to Realistic ESG-Friendly Stock Portfolios JF - Risks N2 - Finding an optimal balance between risk and returns in investment portfolios is a central challenge in quantitative finance, often addressed through Markowitz portfolio theory (MPT). While traditional portfolio optimization is carried out in a continuous fashion, as if stocks could be bought in fractional increments, practical implementations often resort to approximations, as fractional stocks are typically not tradeable. While these approximations are effective for large investment budgets, they deteriorate as budgets decrease. To alleviate this issue, a discrete Markowitz portfolio theory (DMPT) with finite budgets and integer stock weights can be formulated, but results in a non-polynomial (NP)-hard problem. Recent progress in quantum processing units (QPUs), including quantum annealers, makes solving DMPT problems feasible. Our study explores portfolio optimization on quantum annealers, establishing a mapping between continuous and discrete Markowitz portfolio theories. We find that correctly normalized discrete portfolios converge to continuous solutions as budgets increase. Our DMPT implementation provides efficient frontier solutions, outperforming traditional rounding methods, even for moderate budgets. Responding to the demand for environmentally and socially responsible investments, we enhance our discrete portfolio optimization with ESG (environmental, social, governance) ratings for EURO STOXX 50 index stocks. We introduce a utility function incorporating ESG ratings to balance risk, return and ESG friendliness, and discuss implications for ESG-aware investors. Y1 - 2024 UR - http://dx.doi.org/10.3390/risks12040066 U6 - https://doi.org/10.3390/risks12040066 SN - 2227-9091 VL - 12 IS - 4 SP - 1 EP - 12 PB - MDPI ER - TY - JOUR A1 - Ochkov, V. F. A1 - Kraska, Martin A1 - Lukatsky, A. M. T1 - Математический Анализ Трамвайных Путей T1 - Mathematical Analysis of Tram Tracks JF - Физика в школе N2 - В статье рассказано, как необходимо проектировать повороты железной дороги, чтобы не было сильных боковых толчков. используются методы математического анализа для решения задачи. пред- ложена новая переходная кривая N2 - The article explains how to design railroad turns to minimize lateral jolts. mathematical analysis methods are used to solve the problem. a new transi- tion curve is proposed. Y1 - 2024 UR - http://twt.mpei.ac.ru/OCHKOV/Physic-in-School-1-2024.pdf U6 - https://doi.org/10.47639/0130-5522_2024_1_32 SP - 32 EP - 45 ER - TY - JOUR A1 - Arroyo, Hector Linares A1 - Abascal, Angela A1 - Degen, Tobias A1 - Aubé, Martin A1 - Espey, Brian R. A1 - Gyuk, Geza A1 - Hölker, Franz A1 - Jechow, Andreas A1 - Kuffer, Monika A1 - Sánchez de Miguel, Alejandro A1 - Simoneau, Alexandre A1 - Walczak, Ken A1 - Kyba, Christopher C. M. T1 - Monitoring, trends and impacts of light pollution JF - Nature Reviews Earth & Environment N2 - Light pollution has increased globally, with 80% of the total population now living under light-polluted skies. In this Review, we elucidate the scope and importance of light pollution and discuss techniques to monitor it. In urban areas, light emissions from sources such as street lights lead to a zenith radiance 40 times larger than that of an unpolluted night sky. Non-urban areas account for over 50% of the total night-time light observed by satellites, with contributions from sources such as transportation networks and resource extraction. Artificial light can disturb the migratory and reproductive behaviours of animals even at the low illuminances from diffuse skyglow. Additionally, lighting (indoor and outdoor) accounts for 20% of global electricity consumption and 6% of CO2 emissions, leading to indirect environmental impacts and a financial cost. However, existing monitoring techniques can only perform a limited number of measurements throughout the night and lack spectral and spatial resolution. Therefore, satellites with improved spectral and spatial resolution are needed to enable time series analysis of light pollution trends throughout the night. Y1 - 2024 U6 - https://doi.org/10.1038/s43017-024-00555-9 SP - 1 EP - 14 PB - Springer Nature ER - TY - JOUR A1 - Vega, Catherine Perez A1 - Hölker, Franz A1 - Zielinska-Dabkowska, Karolina M A1 - Jechow, Andreas T1 - Polarised light pollution on river water surfaces caused by artificial light at night from illuminated bridges and surroundings JF - Journal of Limnology N2 - Artificial light at night originating from bridge illumination can cause polarised light pollution when it is reflected at water body surfaces. This alters the optical conditions of a river at night and potentially interferes with natural polarisation signals from, for example, moonlight. Therefore, this type of light pollution could detrimentally change the behaviour of organisms sensitive to polarised light, a navigational cue and signal known to be used e.g. by flying water-seeking insects to detect suitable aquatic habitats to reproduce and lay eggs. So far, polarised light pollution from artificial light at night is understudied. Here, we quantify polarised light pollution at the water’s surface near seven illuminated bridges crossing the river Spree in Berlin. Our measurements show for the first time, that nocturnal bridge illumination induces polarised light pollution towards potential flying paths of polarotactic aquatic insects. On average, around 9% of the water surfaces at the investigated bridges were highly polluted by polarised light, with values ranging between 3 and 12 % for each bridge. Thus, polarised light pollution from artificial light at night is an emergent pollutant for aquatic systems. Future work on this topic should include more comprehensive measurements, further ecological studies on its impacts and the development of sustainable lighting solutions that can contribute to the protection of riverine nightscapes. Y1 - 2024 U6 - https://doi.org/10.4081/jlimnol.2024.2173 VL - 83 SP - 1 EP - 13 PB - PAGEPress ER - TY - JOUR A1 - Jechow, Andreas T1 - Let there be Skyglow - light pollution from a large outdoor music festival (Lollapalooza Berlin 2016) JF - Scientific Reports N2 - Live music is often linked to elaborate light shows, particularly at large outdoor music festivals. However, artificial light at night is one form of environmental pollution, light pollution, and because outdoor festivals emit a substantial amount of artificial light into the environment, they are a potential source of light pollution. So far, no studies that quantified the impact of such festivals on urban light pollution and skyglow exist. Here, the light pollution produced by a major rock festival (Lollapalooza Berlin 2016 with 70,000 visitors per day in an urban park) was investigated with ground-based radiometry and night-time light data. A small night-sky radiometer installed near the main stages and a calibrated digital camera from a nearby observation spot inside of the park were used to quantify changes in night sky brightness and direct light emissions within the park. The impact of the music festival on the urban skyglow was indeed measurable. Zenith luminance increased locally by up to a factor of 8 and illuminance increased by about 50% at the observation spot within the park. The radiance detected by night-time satellite was also increased during the festival. This is the first time, that light pollution from such a major rock music event was quantified. Y1 - 2024 U6 - https://doi.org/10.1038/s41598-024-62448-7 VL - 14 SP - 1 EP - 10 PB - Springer Nature ER - TY - JOUR A1 - Klopp, Christoph A1 - Trittel, Torsten A1 - Stannarius, Ralf T1 - Coarsening of Quasi Two-Dimensional Emulsions Formed by Islands in Free-Standing Smectic Films JF - CHEMPHYSCHEM N2 - We study the coarsening behavior of assemblies of islands on smectic A freely suspended films in ISS microgravity experiments. The islands can be regarded as liquid inclusions in a two-dimensional fluid in analogy to liquid droplets of the discontinuous phase of an emulsion. The coarsening is effectuated by two processes, predominantly by island coalescence, but to some extend also by Ostwald ripening, whereby large islands grow at the expense of surrounding smaller ones. A peculiarity of this system is that the continuous and the discontinuous phases consist of the same material. We determine the dynamics, analyze the self-similar aging of the island size distribution and discuss characteristic exponents of the mean island growth. Smectic islands on a thin freely suspended smectic film form a quasi two-dimensional emulsion, without a liquid subphase. We describe the coarsening dynamics that involves island coalescence and Ostwald ripening. Y1 - 2024 U6 - https://doi.org/10.1002/cphc.202400166 SN - 1439-4235 SP - 1 EP - 13 PB - Wiley ER - TY - CHAP A1 - Hagen, Dirk A1 - Hasche, Eberhard A1 - Creutzburg, Reiner M. T1 - The 300th anniversary of Immanuel Kant: opportunities and challenges of the mega-event with ethically oriented XR and VFX T2 - SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States N2 - The 300th birthday of the world-famous German philosopher Immanuel Kant (1724-1804) in 2024 offers an extraordinary opportunity to explore integrating advanced technologies into cultural mega-events. This paper examines the opportunities and challenges of using various technologies, such as Extended Reality (XR) and Visual Effects (VFX), to bring this essential European intellectual to a broader audience. These technologies, including technological advances based on real-time rendering in conjunction with LED volumes and high-quality 3D assets, offer immersive and interactive event experiences. However, the use of these technologies presents specific challenges, such as processing limitations and the need to create specialized content, including the development of 3D models relevant to the life and philosophy of Immanuel Kant. This article provides an overview of the current state of such opportunities and challenges and examines their application in the context of this cultural mega-event. The aim is to create a compelling event experience, e.g., as part of a museum visit, while simultaneously using technology in a meaningful educational way. It is essential not to overload historical and intellectual personalities such as Immanuel Kant with technological possibilities in the sense of an ethical responsibility. At the same time, the creation and communication of knowledge require explanation in a museum context or another explanatory framework. Y1 - 2024 U6 - https://doi.org/10.1117/12.3025603 SP - 193 EP - 204 ER - TY - JOUR A1 - Dietenberger, Manuel A1 - Jechow, Andreas A1 - Kalinkat, Gregor A1 - Schroer, Sibylle A1 - Saathoff, Birte A1 - Hölker, Franz T1 - Reducing the fatal attraction of nocturnal insects using tailored and shielded road lights JF - communications biology N2 - The attraction of insects to artificial light is a global environmental problem with far-reaching implications for ecosystems. Since light pollution is rarely integrated into conservation approaches, effective mitigation strategies towards environmentally friendly lighting that drastically reduce insect attraction are urgently needed. Here, we tested novel luminaires in two experiments (i) at a controlled experimental field site and (ii) on streets within three municipalities. The luminaires are individually tailored to only emit light onto the target area and to reduce spill light. In addition, a customized shielding renders the light source nearly invisible beyond the lit area. We show that these novel luminaires significantly reduce the attraction effect on flying insects compared to different conventional luminaires with the same illuminance on the ground. This underlines the huge potential of spatially optimized lighting to help to bend the curve of global insect decline without compromising human safety aspects. A customized light distribution should therefore be part of sustainable future lighting concepts, most relevant in the vicinity of protected areas. Y1 - 2024 U6 - https://doi.org/10.1038/s42003-024-06304-4 VL - 7 SP - 1 EP - 12 ER - TY - CHAP A1 - Veldyaeva, Ekaterina A1 - Fitz, Lukas R. G. A1 - Scheeg, Jochen T1 - Gamifying IT Service Management Education for Future IT Professionals T2 - Pacific Asia Conference on Information Systems, Ho Chi Minh City, Vietnam, 2024 N2 - IT Service Management (ITSM) education is nowadays an established subject of IT-related higher education programs worldwide. The recent years have witnessed significant developments in software and ITSM frameworks, which underscores the importance of adapting educational formats to meet the latest standards. Recent developments include the introduction of practice-oriented approaches and case-based learning. Building upon previous literature, this study describes and evaluates the first iteration of a teaching case integrating a simulation game for practicing ITIL® 4 foundations in an undergraduate ITSM curriculum. The game-based approach shows scalability and dynamism, fostering high student engagement and content comprehension. It represents a promising avenue for training IT workers and contributes to ongoing ITSM education development. Y1 - 2024 UR - https://aisel.aisnet.org/cgi/viewcontent.cgi?article=1066&context=pacis2024 SP - 1 EP - 9 ER - TY - CHAP A1 - Kraska, Martin T1 - SMath + Maxima - Powerful Tool for Engineering Calculations T2 - 2024 7th International Conference on Information Technologies in Engineering Education (Inforino), Moscow, Russian Federation N2 - SMath Studio is mathematical notebook software similar to Mathcad. Its outstanding and intuitive support for scientific units makes it an invaluable asset in higher engineering education. SMath Studio has been used for more than ten years in various courses at Brandenburg University of Applied Sciences, Germany (Technische Hochschule Brandenburg, THB). To enhance the usability of the software, substantial contributions have been made. One of them is the Maxima plugin for access to the free and open-source computer algebra system Maxima. This plugin combines the flexible notebook format of SMath Studio with powerful symbolic functions like integrals and solvers for algebraic and differential equations. Additionally, the plugin adds interactive 3D graphics to SMath. The paper discusses the basic design, features, and limitations, and showcases some applications. Y1 - 2024 SN - 979-8-3503-7136-9 U6 - https://doi.org/10.1109/Inforino60363.2024.10551993 SP - 1 EP - 5 PB - IEEE ER - TY - CHAP A1 - Fitz, Lukas R. G. A1 - Scheeg, Michaela A1 - Scheeg, Jochen T1 - Information, Inspiration, Innovation - Designing an Open Innovation Platform for SME Digital Transformation Projects T2 - CENTERIS – International Conference on ENTERprise Information Systems / ProjMAN – International Conference on Project MANagement / HCist – International Conference on Health and Social Care Information Systems and Technologies 2023 N2 - When small- and medium-sized Enterprises (SMEs) pursue digital transformation (DT) projects, awareness for available solutions and exploration of best practices and collaboration opportunities belong to key activities. This short paper presents background, design and preliminary evaluation of an open innovation (OI) platform for SME DT, which showcases projects completed by collaborating expert institutions and offers new project pitches. Initial findings from user tests with SME practitioners indicate that the solution supports SMEs in DT exploration phases. Moreover, insights on SME OI platform design criteria are derived. Y1 - 2024 U6 - https://doi.org/10.1016/j.procs.2024.06.276 SP - 11009 EP - 11114 PB - Elsevier ER - TY - JOUR A1 - Ogashawara, Igor A1 - Wollrab, Sabine A1 - Berger, Stella A. A1 - Kiel, Christine A1 - Jechow, Andreas A1 - Guislain, Alexis L. N. A1 - Gege, Peter A1 - Ruhtz, Thomas A1 - Hieronymi, Martin A1 - Schneider, Thomas A1 - Lischeid, Gunnar A1 - Singer, Gabriel A. A1 - Hölker, Franz A1 - Grossart, Hans-Peter A1 - Nejstgaard, Jens Christian T1 - Unleashing the power of remote sensing data in aquatic research: Guidelines for optimal utilization JF - Limnology and Oceanography Letters N2 - The growing utilization of remote sensing data in lake studies provides crucial spatial insights into biogeochemistry and biology. However, clarity regarding the development and intended use of remote sensing products is often lacking. This letter aims to elucidate the tradeoffs for the utilization of remote sensing data in limnological studies with an example of based on the estimation of chlorophyll a due to its importance as a water quality indicator. The analysis initiates with a meticulous product selection, requiring an evaluation of its capacity to address the optical complexity of freshwater systems. Assessing atmospheric correction and product limitations ensures alignment with the study's objectives. Subsequently, rigorous validation of remote sensing products is essential, accompanied by a cautious interpretation of the data. This letter advocates for the use of remote sensing data, offering key strategies for their optimal utilization in lake studies. Y1 - 2024 U6 - https://doi.org/10.1002/lol2.10427 SP - 1 EP - 7 PB - Wiley ER -