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Aufgrund der §§ 2 Abs. 4 S. 2, 16 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 Richtlinie erlassen.
Ausgefertigt aufgrund des Beschlusses des Präsidiums der Hochschule Düsseldorf am 30.08.2023.
Düsseldorf, den 25.09.2023
Aufgrund des § 31 Abs. 2 der Verordnung betreffend die digitale Lehre sowie betreffend die Durchführung online gestützter Wahlen der Hochschulen und der Studierendenschaften (Hochschul-Digitalverordnung – HDVO) vom 22.09.2023 (GV. NRW. S. 1116) hat das Präsidium der Hochschule Düsseldorf folgende Übergangsbestimmungen für das Wintersemester 2023/24 erlassen.
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.
Das vom Bundesministerium für Bildung und Forschung geförderte Forschungsprojekt IZESO untersucht vielschichtige Formen des zivilgesellschaftlichen Engagements im Alltag, Zugänge zu Engagement und institutionelle Blockierungen und Barrieren. Im Zuge einer ethnografischen Feldforschung wurde ein paradigmatisches Modell sozialräumlichen Engagements entwickelt. Es stellt Engagementprofile dar und bezieht intervenierende Bedingungen auf der Mikro-, Meso- und Makroeben ein. Hierdurch lassen sich Zugänge zu und Ausschlüsse von spezifischen Engagementformen identifizieren.
Despite the higher uptake of digital media also in older age groups, there are still challenges for people of high ages and with cognitive or motoric problems, which prevent them from learning and using devices like smartphones or tablets. Tangible user interfaces provide an opportunity to connect these people to social media, thereby increasing their digital participation in society and reducing loneliness. In this paper, we discuss the challenges of intergenerational communication and research the opportunities affiliated with tangible technologies to overcome technology barriers for adults of high ages. We present a hybrid system for social media interactions between young smartphone users and their old relatives, who do not use mobile technologies. The system consists of a tangible user interface designed specifically for old adults that connects to a standard mobile messenger service. TAMI was designed in a user-centered process to fulfill the needs of older adults and tested in a longer-term field study with pairs of young and old relatives.
User-centered and Participatory Design approaches have become widespread within HCI, also when designing digital media for older adults. These methodologies are seen as crucial to adapt technology design to older people's needs and increase their acceptance of digital technology. Nevertheless, it is often difficult to reach a diverse group of older people, for instance, people with limited technology skills, limited mobility, or cognitive issues. In addition, gerontologists criticized lately how older people's participation unfolds in technology design projects, e.g. that people are pushed into the role of users. Little is known about the motivations and needs of older adults regarding their participation in HCI research. To close this gap, we conducted an online survey (N=46) and semi-structured interviews (N=8) focusing on motivations, willingness and experiences regarding participation. Results show that people are generally willing to participate due to interest in the topic, learning new things and social bonding. However, despite the conceptions within HCI that long-term engagement is crucial within participatory design, older people in the study preferred less commitment and more open formats.
The healthcare sector's digital transformation necessitates the involvement of stakeholders through participation and co-creation processes. This study aims to investigate the understanding and implementation of participation and co-creation in the development of hybrid interaction technologies in healthcare. Eight interdisciplinary research projects were examined through semi-structured group interviews with 49 participants from academia, industry, and the application field. The interviews focused on participants' perspectives on project goals, user groups, access to the field, methods of participation and co-creation, and user motivation. The results highlight the diverse understandings of participation and co-creation, with some perceiving them as research-driven and others as already embedded in user- centered design. The projects emphasized user needs but often excluded stakeholders from collaborative decision-making. Challenges in achieving continuous involvement and co-decision were acknowledged. The findings underscore the need for reflexive practice and evaluation of participation and co-creation throughout the development process, as well as further research on participation across projects. By addressing these challenges and embracing participatory approaches, digital health applications can better address ethical concerns, build trust, and increase acceptance and adoption in the healthcare sector.
Diese Studie befasst sich mit der Akzeptanz von Lautstärke-Begrenzungen seitens der Besucher*innen von Musik-Veranstaltungen unter Anwendung eines C-bewerteten Schalldruckpegel-Grenzwertes. Im Gegensatz zu einem A-Bewertungsfilter kann ein CBewertungsfilter unterstützen, das gehörschädigende Potenzial hoher tieffrequenter Schalldruckpegel elektronischer Musik-Genre, wie zum Beispiel Techno, abzuschätzen. Dazu wurden, basierend auf einer französischen Verordnung zum Schutz des Publikums von Veranstaltungen vor hohen Schalldrücken (Décret no 2017-1244) sowie der deutschen Norm DIN15905-5, bei sieben Veranstaltungen, bei denen die Musik-Genre EDM, Techno, Tech-House, Psy-Trance und Dubstep geboten wurden, C- und A-bewertete Schalldruckpegel-Grenzwerte festgelegt. Die Besucher*innen der Veranstaltungen, die sich bereit erklärten an der Studie teilzunehmen, wurden hinsichtlich ihrer Zufriedenheit gegenüber der Musik-Lautstärke sowie ihrem Besuchsverhalten von Veranstaltungen mit gleichen Musik-Lautstärken befragt. Die 163 Teilnehmer*innen der Umfrage äußerten sich überwiegend positiv zu vorherrschenden Schalldruckpegeln. Mehr als 80% der Teilnehmer*innen würden Musik-Veranstaltungen, die auf Lautstärken von bis zu 118 dB LCeq,15min und 99 dB LAeq,30min begrenzt sind, regelmäßig besuchen. Ein signifikanter Zusammenhang zwischen dem Besuchsverhalten und Schalldruckpegel-Schwankungen unterhalb der definierten Grenzwerte um bis zu 9 dB(A,C) konnte nicht festgestellt werden. Bei Veranstaltungen der in dieser Studie überprüften Musik-Genre werden Schalldruckpegel-Begrenzungen auf 118 dB LCeq,15min und 99 dB LAeq,30min vom Publikum akzeptiert und können von Veranstalter*innen zum Schutz des Gehörs der Besucher*innen ohne Einfluss auf das Besuchsverhalten und damit einhergehende wirtschaftliche Aspekte einer Veranstaltung angewandt werden.
Medien, Design und Demenz
(2018)
Wear it or fear it: exploration of drivers & barriers in smartwatch acceptance by senior citizens
(2018)
Probing the Potential of Multimedia Artefacts to Support Communication of People with Dementia
(2015)
“Public Brewing“ – eine interaktive Medienfassade mit einer be-greifbaren Nutzerschnittstelle
(2014)
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.
Spatial precision and recall indices to assess the performance of instance segmentation algorithms
(2022)
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.
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.
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.
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.
899 - Erste Satzung zur Änderung der Leistungsbezügeordnung der Hochschule Düsseldorf vom 24.08.2023
(2023)
Aufgrund des § 2 Abs. 4 S. 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 und der Verordnung über die Gewährung und Bemessung von Leistungsbezügen sowie über die Gewährung von Forschung- und Lehrzulagen für Hochschulbedienstete (Hochschul-Leistungsbezügeverordnung - HLeistBVO) vom 17.12.2004 (GV. NRW. S. 790) in der aktuell geltenden Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen.