Filtern
Erscheinungsjahr
- 2019 (204) (entfernen)
Dokumenttyp
- Wissenschaftlicher Artikel (51)
- HS-Verwaltungsschriften (48)
- Konferenzveröffentlichung (30)
- Arbeitspapier / Forschungsbericht (25)
- Sammelbandbeitrag/Buchkapitel (17)
- Bachelorarbeit (13)
- Buch (Monographie) (7)
- Masterarbeit (6)
- Artikel im Fachmagazin (2)
- Dissertation (2)
Schlagworte
- Amtliche Mitteilungen (45)
- Prüfungsrecht (38)
- Prüfungsordnung (30)
- Bachelor (28)
- Änderung (21)
- Satzung (19)
- Master (18)
- IFRS (15)
- DOAJ (9)
- Forena (5)
Fachbereich/Einrichtung
- Fachbereich - Sozial- & Kulturwissenschaften (56)
- Hochschulverwaltung (47)
- Fachbereich - Maschinenbau und Verfahrenstechnik (43)
- Fachbereich - Medien (35)
- Fachbereich - Wirtschaftswissenschaften (28)
- Fachbereich - Elektro- & Informationstechnik (15)
- Fachbereich - Architektur (8)
- Fachbereich - Design (7)
- Digital Learning and Digital Literacy (6)
- Creative Media Production and Entertainment Computing (4)
- Digitale Vernetzung und Informationssicherheit (4)
- Digital Health (2)
- Hochschule Düsseldorf (2)
- Intelligente Mensch-Technik-Interaktion (2)
- Campus IT (1)
- Hochschulbibliothek (1)
- Sound and Vibration Engineering (1)
Kempen wird zum Reallabor
(2019)
Actin filaments are conductive to ionic currents, mechanical and voltage solitons. These travelling localisations can be utilised to generate computing circuits from actin networks. The propagation of localisations on a single actin filament is experimentally unfeasible to control. Therefore, we consider excitation waves propagating on bundles of actin filaments. In computational experiments with a two-dimensional slice of an actin bundle network we show that by using an arbitrary arrangement of electrodes, it is possible to implement two-inputs-one-output circuits.
Actin droplet machine
(2019)
The actin droplet machine is a computer model of a three-dimensional network of actin bundles developed in a droplet of a physiological solution, which implements mappings of sets of binary strings. The actin bundle network is conductive to travelling excitations, i.e. impulses. The machine is interfaced with an arbitrary selected set of k electrodes through which stimuli, binary strings of length k represented by impulses generated on the electrodes, are applied and responses are recorded. The responses are recorded in a form of impulses and then converted to binary strings. The machine's state is a binary string of length k: if there is an impulse recorded on the ith electrode, there is a '1' in the ith position of the string, and '0' otherwise. We present a design of the machine and analyse its state transition graphs. We envisage that actin droplet machines could form an elementary processor of future massive parallel computers made from biopolymers.
Computational investigation of hemodynamics in hardshell venous reservoirs: A comparative study
(2019)
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.
Experimental investigation of heat transfer performance of corrugated tube with spring tape inserts
(2019)
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.
„Provisorisch für immer?“ Flüchtlingslager zwischen Nothilfe und langfristiger Entwicklungsplanung
(2019)
In dieser Bachelorarbeit wurde quantitativ zur Leistungsmotivation und dem individuellen Studienerfolg geforscht. Es wurden N = 167 Studierende des Studiengangs Sozialarbeit/Sozialpädagogik der Hochschule Düsseldorf mit einem teilstandardisierten Fragebogen bezüglich ihrer Leistungsmotivation und individuellem Studienerfolg befragt, welcher sich aus der bisherigen Bachelordurchschnittsnote, der Studienabbruchsintention, der Studienzufriedenheit sowie der Prozentzahl bestandener Prüfung, zusammensetzt. Untersucht wurde, ob Zusam- menhänge zwischen Leistungsmotivation und dem individuellen Studienerfolg bestehen und ob sich benotete und unbenotete Studierende hinsichtlich ihrer Leistungsmotivation, Studien- abbruchsintention und Studienzufriedenheit unterscheiden. Die Ergebnisse zeigen, dass die bisherige Bachelordurchschnittsnote, Studienabbruchsintention, Studienzufriedenheit und die Prozentzahl bestandener Prüfungen statistisch signifikant Leistungsmotivation voraussagen (F (4, 153) = 2.58, p < .05). Die benoteten und unbenoteten Studierenden unterscheiden sich nicht voneinander.
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.
Instrumente sozialen Wandels
(2019)
In German music education, the focus has historically been on formal music education in schools. Participatory music making in the community, or community music, has so far received little attention in theory or practice. This thesis constitutes the first in-depth analysis of the development of community music in Germany, conducted using empirical data and literature analysis. The development of the Munich Community Music Action Research Group is highlighted as an example of the potential of community music in the German context. The research shows that the context-specific development of a framework for community music in Germany, within the community music spirit of participation reflected in the action research methodology, gives voice to and connects community musicians, and has contributed considerably to the development of community music theory and practice, not only in Munich, but across Germany.
Community Music
(2019)
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.
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.
Die Veröffentlichung gibt zunächst einen Überblick über das Themenfeld "Chatbots" aus der medieninformatischen und kommunikationswissenschaftlichen Perspektive. Auchwird der Einsatz von Chatbots als Kommunikations- und Marketinginstrument im Hochschulbereich diskutiert. Aufbauend auf einer Weiterentwicklung des Technologieakzeptanzmodells (TAM) wird der Konzeptionsprozess eines Chatbotprototyps für den Masterstudiengang "Kommunikations-, Multimedia- und Marktmanagement" dokumentiert und der Prototyp selbst empirisch evaluiert. Die Zielgruppe der Studierenden stellt einem solchen Kommunikationsinstrument ein positives Zeugnis aus. Die Entscheidung einer Hochschule zur Einführungeines Chatbots sollte jedoch individuell vor dem Hintergrund einer Kosten-Nutzen-Abwägung und der eigenen pädagogischen Mission getroffen werden.
Soziale Arbeit, verstanden als Instanz zur Bearbeitung sozialer Ungleichheit, ist auch im deutschen Strafrechtssystem tätig. Bisher sind jedoch Studien zu der Frage, inwieweit Soziale Arbeit im Strafrechtssystem aufgrund der dort vorherrschenden institutionellen Bedingungen zum Abbau sozialer Ungleichheit beizutragen vermag oder gar an deren (Re-)Produktion beteiligt ist, noch rar. Deshalb wurden in der hiesigen Studie 16 Qualitätsleitfäden bzw. Arbeitsanweisungen aus sieben Bundesländern analysiert, die Soziale Arbeit in der (Jugend-)Gerichtshilfe, Bewährungshilfe oder in den Sozialen Diensten im Vollzug einsetzen bzw. berücksichtigen soll. Dabei wurde ein intersektionalitätstheoretischer Zugang gewählt, so dass nicht nur einzelne soziale Kategorien wie Geschlecht, soziale oder ethnische Herkunft in den Fokus kamen, sondern auch die wechselseitigen Kreuzungen dieser Differenzmerkmale, nach denen Menschen kategorisiert und mit sozial ungleichen Lebenschancen ausgestattet sind.