@inproceedings{FatemiTischbeinWirtzetal.2023, author = {Fatemi, Armin and Tischbein, Franziska and Wirtz, Frank and Schmoger, Christin and Dorendorf, Stefan and Schurtz, Annika and Echternacht, David and Ulbig, Andreas}, title = {On the Impact of Smartification Strategies for the State Estimation of Low Voltage Grids}, series = {13th "Internationale Energiewirtschaftstagung" (IEWT2023), February 15-17, 2023, Vienna, Austria}, booktitle = {13th "Internationale Energiewirtschaftstagung" (IEWT2023), February 15-17, 2023, Vienna, Austria}, address = {Wien}, doi = {10.48550/arXiv.2303.07964}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41282}, pages = {1 -- 15}, year = {2023}, abstract = {The decarbonization of for example the energy or heat sector leads to the transformation of distribution grids. The expansion of decentralized energy resources and the integration of new consumers due to sector coupling (e.g. heat pumps or electric vehicles) into low voltage grids increases the need for grid expansion and usage of flexibilities in the grid. A high observability of the current grid status is needed to perform these tasks efficiently and effectively. Therefore, there is a need to increase the observability of low voltage grids by installing measurement technologies (e.g. smart meters). Multiple different measurement technologies are available for low voltage grids which can vary in their benefit to observation quality and their installation costs. Therefore, Bayernwerk Netz GmbH and E.DIS AG in cooperation with E-Bridge Consulting GmbH and the Institute for High Voltage Equipment and Grids, Digitalization and Energy Economics (IAEW) investigated the effectiveness of different strategies for the smartification of low voltage grids. This paper presents the methodology used for the investigation and exemplary results focusing on the impact of intelligent cable distribution cabinets and smart meters on the quality of the state estimation.}, language = {en} } @inproceedings{LehmannWittpahlZakouretal.2018, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Resolution and accuracy of non-linear regression of PSF with artificial neural networks}, series = {SPIE Optical Systems Design: Optical Instrument Science, Technology, and Applications, 2018, Frankfurt, Germany}, volume = {Proc. SPIE, Vol. 10695}, booktitle = {SPIE Optical Systems Design: Optical Instrument Science, Technology, and Applications, 2018, Frankfurt, Germany}, number = {106950C}, editor = {Haverkamp, Nils and Youngworth, Richard N.}, publisher = {International Society for Optics and Photonics}, address = {Frankfurt}, organization = {International Society for Optics and Photonics}, doi = {10.1117/12.2313144}, pages = {52 -- 63}, year = {2018}, abstract = {In a previous work we have demonstrated a novel numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The novelty lies in the portability and the parameterization of this model, which allows for completely new ways to validate optical systems, which is especially interesting for mass production optics like in the automotive industry, but also for ophtalmology. The numerical basis for this model is a non-linear regression of the PSF with an artificial neural network (ANN). In this work we examine two important aspects of this model: the spatial resolution and the accuracy of the model. Measurement and simulation of a PSF can have a much higher resolution then the typical pixel size used in current camera sensors, especially those for the automotive industry. We discuss the influence this has on on the topology of the ANN and the final application where the modeled PSF is actually used. Another important influence on the accuracy of the trained ANN is the error metric which is used during training. The PSF is a distinctly non-linear function, which varies strongly over field and defocus, but nonetheless exhibits strong symmetries and spatial relations. Therefore we examine different distance and similarity measures and discuss its influence on the modeling performance of the ANN.}, language = {en} } @inproceedings{BrettschneiderHerderdeMooijetal.2019, author = {Brettschneider, Nico and Herder, Jens and de Mooij, Jeroen and Ryskeldiev, Bektur}, title = {Audio vs. Visual Avatars as Guides in Virtual Environments}, series = {21th International Conference on Human and Computer, HC-2018, March 27-28, 2019, Shizuoka University, Hamamatsu, Japan.}, booktitle = {21th International Conference on Human and Computer, HC-2018, March 27-28, 2019, Shizuoka University, Hamamatsu, Japan.}, editor = {Herder, Jens}, publisher = {Hochschule D{\"u}sseldorf}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, doi = {10.20385/0hrj-qc02}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-23859}, pages = {9}, year = {2019}, abstract = {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.}, language = {en} } @article{LehmannWittpahlZakouretal.2019, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Modeling realistic optical aberrations to reuse existing drive scene recordings for autonomous driving validation}, series = {Journal of Electronic Imaging}, volume = {28}, journal = {Journal of Electronic Imaging}, number = {1}, publisher = {SPIE}, issn = {1560-229X}, doi = {10.1117/1.JEI.28.1.013005}, pages = {013005}, year = {2019}, abstract = {Training autonomous vehicles requires lots of driving sequences in all situations. Collecting and labeling these drive scenes is a very time-consuming and expensive process. Currently, it is not possible to reuse these drive scenes with different optical properties, because there exists no numerically efficient model for the transfer function of the optical system. We present a numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network. The novelty lies in the portability and the parameterization of this model. We present a lens measurement series, yielding a numerical function for the PSF that depends only on the parameters defocus, field, and azimuth. By convolving existing images and videos with this PSF, we generate images as if seen through the measured lens. The methodology applies to any optical scenario, but we focus on the context of autonomous driving, where the quality of the detection algorithms depends directly on the optical quality of the used camera system. With this model, it is possible to reuse existing recordings, with the potential to avoid millions of test drive miles. The parameterization of the optical model allows for a method to validate the functional and safety limits of camera-based advanced driver assistance systems based on the real, measured lens actually used in the product.}, language = {en} } @article{LehmannWittpahlZakouretal.2019, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Resolution and accuracy of nonlinear regression of point spread function with artificial neural networks}, series = {Optical Engineering}, volume = {58}, journal = {Optical Engineering}, number = {4}, publisher = {SPIE}, issn = {0091-3286}, doi = {10.1117/1.oe.58.4.045101}, pages = {045101}, year = {2019}, abstract = {We had already demonstrated a numerical model for the point spread function (PSF) of an optical system that can efficiently model both the experimental measurements and the lens design simulations of the PSF. The novelty lies in the portability and the parameterization of this model, which allow for completely new ways to validate optical systems, which is especially interesting not only for mass production optics such as in the automotive industry but also for ophthalmology. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network (ANN). After briefly describing both the principle and the applications of the model, we then discuss two optically important aspects: the spatial resolution and the accuracy of the model. Using mean squared error (MSE) as a metric, we vary the topology of the neural network, both in the number of neurons and in the number of hidden layers. Measurement and simulation of a PSF can have a much higher spatial resolution than the typical pixel size used in current camera sensors. We discuss the influence this has on the topology of the ANN. The relative accuracy of the averaged pixel MSE is below 10  -  4, thus giving confidence that the regression does indeed model the measurement data with good accuracy. This article is only the starting point, and we propose several research avenues for future work.}, language = {en} } @inproceedings{BallesterRipollHerderLadwigetal.2016, author = {Ballester Ripoll, Marina and Herder, Jens and Ladwig, Philipp and Vermeegen, Kai}, title = {Comparison of two Gesture Recognition Sensors for Virtual TV Studios}, series = {GI-VRAR, Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 13. Workshop der GI-Fachgruppe VR/AR,}, booktitle = {GI-VRAR, Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 13. Workshop der GI-Fachgruppe VR/AR,}, editor = {Pfeiffer, Thies and Fr{\"o}hlich, Julia and Kruse, Rolf}, publisher = {Shaker Verlag}, address = {Herzogenrath}, isbn = {978-3-8440-4718-9}, year = {2016}, abstract = {In order to improve the interactivity between users and computers, recent technologies focus on incorporating gesture recognition into interactive systems. The aim of this article is to evaluate the effectiveness of using a Myo control armband and the Kinect 2 for recognition of gestures in order to interact with virtual objects in a weather report scenario. The Myo armband has an inertial measurement unit and is able to read electrical activity produced by skeletal muscles, which can be recognized as gestures, which are trained by machine learning. A Kinect sensor was used to build up a dataset which contains motion recordings of 8 different gestures and was also build up by a gesture training machine learning algorithm. Both input methods, the Kinect 2 and the Myo armband, were evaluated with the same interaction patterns in a user study, which allows a direct comparison and reveals benefits and limits of each technique.}, language = {en} } @inproceedings{HerderBrettschneiderdeMooijetal.2019, author = {Herder, Jens and Brettschneider, Nico and de Mooij, Jeroen and Ryskeldiev, Bektur}, title = {Avatars for Co-located Collaborations in HMD-based Virtual Environments}, series = {IEEE VR 2019, 26th IEEE Conference on Virtual Reality and 3D User Interfaces, Osaka, March, 2019}, booktitle = {IEEE VR 2019, 26th IEEE Conference on Virtual Reality and 3D User Interfaces, Osaka, March, 2019}, publisher = {IEEE}, address = {Osaka}, doi = {10.1109/VR.2019.8798132}, pages = {968 -- 969}, year = {2019}, abstract = {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. Usage of realtime-tracked avatars in co-located business-oriented applications with a "guide-user-scenario" is examined for user-related factors of Spatial Presence, Social Presence, User Experience and Task Load. A user study was conducted in order to compare both techniques of a realtime-tracked avatar and a non-visualised guide. 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 and engagement.}, language = {en} } @inproceedings{HerderLadwigVermeegenetal.2018, author = {Herder, Jens and Ladwig, Philipp and Vermeegen, Kai and Hergert, Dennis and Busch, Florian and Klever, Kevin and Holthausen, Sebastian and Ryskeldiev, Bektur}, title = {Mixed Reality Experience - How to Use a Virtual (TV) Studio for Demonstration of Virtual Reality Applications}, series = {GRAPP 2018 - 13th International Conference on Computer Graphics Theory and Applications}, booktitle = {GRAPP 2018 - 13th International Conference on Computer Graphics Theory and Applications}, publisher = {INSTICC}, address = {Setubal - Portugal}, isbn = {978-989-758-287-5}, doi = {10.5220/0006637502810287}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-15823}, pages = {281 -- 287}, year = {2018}, abstract = {The article discusses the question of "How to convey the experience in a virtual environment to third parties?" and explains the different technical implementations which can be used for live streaming and recording of a mixed reality experience. The real-world applications of our approach include education, entertainment, e- sports, tutorials, and cinematic trailers, which can benefit from our research by finding a suitable solution for their needs. We explain and outline our Mixed Reality systems as well as discuss the experience of recorded demonstrations of different VR applications, including the need for calibrated camera lens parameters based on realtime encoder values.}, language = {en} } @techreport{ChristiansonHerder1995, author = {Christianson, Kiel and Herder, Jens}, title = {Mini-lectures in Computer Science on the WWW}, address = {Aizu}, organization = {University of Aizu, Center for Language Research}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-854}, year = {1995}, abstract = {The task of the Center for Language Research is to provide content-based English language instruction for students of computer science and engineering. As such, we find ourselves at the confluence of many of the streams currently running through the English Language Teaching profession, including English for Science and Technology (EST), English for Academic Purposes (EAP), English for Specific Purposes (ESP), Computer-assisted language learning (CALL), content-based instruction, and multimedia applications in foreign language pedagogy. This paper describes our initial attempts to construct a number of World Wide Web pages where students will be able to study EST, EAP, and computer science topics on their own in a multimedia environment.}, language = {en} } @inproceedings{GeigerHerderGoebeletal.2010, author = {Geiger, Christian and Herder, Jens and G{\"o}bel, Sebastian and Heinze, Christin and Marinos, Dionysios}, title = {Design and Virtual Studio Presentation of a Traditional Archery Simulator}, series = {Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen, Duisburg, Germany, September 12-15, 2010}, booktitle = {Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen, Duisburg, Germany, September 12-15, 2010}, address = {Duisburg}, pages = {37 -- 44}, year = {2010}, abstract = {In this paper we describe the design of a virtual reality simulator for traditional intuitive archery. Traditional archers aim without a target figure. Good shooting results require an excellent body-eye coordination that allows the user to perform identical movements when drawing the bow. Our simulator provides a virtual archery experience and supports the user to learn and practice the motion sequence of traditional archery in a virtual environment. We use an infrared tracking system to capture the user's movements in order to correct his movement. To provide a realistic haptic feedback a real bow is used as interaction device. Our system provides a believable user experience and supports the user to learn how to shoot in the traditional way. Following a user-centered iterative design approach we developed a number of prototypes and evaluated them for refinement in sequent iteration cycles. For illustration purposes we created a short video clip in our virtual studio about this project that presents the main ideas in an informative yet entertaining way.}, language = {en} } @inproceedings{MuellerBraunKeuper2022, author = {M{\"u}ller, Patrick and Braun, Alexander and Keuper, Margret}, title = {Impact of realistic properties of the point spread function on classification tasks to reveal a possible distribution shift}, series = {NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA}, booktitle = {NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA}, address = {New Orleans}, year = {2022}, language = {en} } @article{KernebeckHollePogschebaetal.2019, author = {Kernebeck, Sven and Holle, Daniela and Pogscheba, Patrick and Jordan, Felix and Mertl, Fabian and Huldtgren, Alina and Bader, Sebastian and Kirste, Thomas and Teipel, Stefan and Holle, Bernhard and Halek, Margareta}, title = {A Tablet App- and Sensor-Based Assistive Technology Intervention for Informal Caregivers to Manage the Challenging Behavior of People With Dementia (the insideDEM Study): Protocol for a Feasibility Study}, series = {JMIR research protocols}, volume = {8}, journal = {JMIR research protocols}, number = {2}, publisher = {JMIR}, doi = {10.2196/11630}, year = {2019}, language = {en} } @inproceedings{DrochtertGeigerHogenetal.2015, author = {Drochtert, D. and Geiger, Christian and Hogen, M. and Huldtgren, Alina and K{\"o}se, O. and Wiche, R. and Loss, L.}, title = {Public Brewing: a Media Fa{\c{c}}ade with a Mixed Reality Interface}, series = {Proceedings of the 4th International Symposium on Pervasive Displays, 10.06.2015-12.06.2015, Saarbr{\"u}cken}, booktitle = {Proceedings of the 4th International Symposium on Pervasive Displays, 10.06.2015-12.06.2015, Saarbr{\"u}cken}, editor = {Gehring, Sven and Kr{\"u}ger, Antonio and Alt, Florian and Taylor, Nick}, publisher = {ACM}, address = {New York}, isbn = {9781450336086}, doi = {10.1145/2757710.2757736}, pages = {69 -- 75}, year = {2015}, language = {en} } @incollection{HuldtgrenMertlVormannetal.2015, author = {Huldtgren, Alina and Mertl, Fabian and Vormann, Anja and Geiger, Christian}, title = {Probing the Potential of Multimedia Artefacts to Support Communication of People with Dementia}, series = {Human-Computer Interaction - INTERACT 2015}, booktitle = {Human-Computer Interaction - INTERACT 2015}, editor = {Abascal, Julio and Barbosa, Simone and Fetter, Mirko and Gross, Tom and Palanque, Philippe and Winckler, Marco}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-22697-2}, doi = {10.1007/978-3-319-22698-9_6}, pages = {71 -- 79}, year = {2015}, language = {en} } @inproceedings{HuldtgrenVormannGeiger2015, author = {Huldtgren, Alina and Vormann, Anja and Geiger, Christian}, title = {Mapping Memories for People with Dementia}, series = {Information and Communication Technologies for Ageing Well and e-Health}, booktitle = {Information and Communication Technologies for Ageing Well and e-Health}, editor = {Helfert, Markus and Holzinger, Andreas and Ziefle, Martina and Fred, Ana and O'Donoghue, John and R{\"o}cker, Carsten}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-27694-6}, doi = {10.1007/978-3-319-27695-3_10}, pages = {165 -- 184}, year = {2015}, language = {en} } @article{HuldtgrenMertlVormannetal.2017, author = {Huldtgren, Alina and Mertl, Fabian and Vormann, Anja and Geiger, Christian}, title = {Reminiscence of People With Dementia Mediated by Multimedia Artifacts}, series = {Interacting with Computers}, volume = {29}, journal = {Interacting with Computers}, number = {5}, publisher = {Oxford University Press}, doi = {10.1093/iwc/iwx005}, pages = {679 -- 696}, year = {2017}, language = {en} } @inproceedings{HuldtgrenMayerKierepkaetal.2014, author = {Huldtgren, Alina and Mayer, Christian and Kierepka, Oliver and Geiger, Christian}, title = {Towards serendipitous urban encounters with SoundtrackOfYourLife}, series = {Proceedings of the 11th Conference on Advances in Computer Entertainment Technology, Funchal, 11.11.2014-14.11.2014}, booktitle = {Proceedings of the 11th Conference on Advances in Computer Entertainment Technology, Funchal, 11.11.2014-14.11.2014}, editor = {Chisik, Yoram}, publisher = {ACM}, address = {New York}, isbn = {9781450329453}, doi = {10.1145/2663806.2663836}, pages = {1 -- 8}, year = {2014}, language = {en} } @inproceedings{HuldtgrenPedroPohlmeyeretal.2014, author = {Huldtgren, Alina and Pedro, Gabriela Ascencio San and Pohlmeyer, Anna E. and Herrara, Natalia A.Romero}, title = {AAL-technology acceptance through experience}, series = {Proceedings - PERVASIVEHEALTH 2014: 8th International Conference on Pervasive Computing Technologies for Healthcare, Oldenburg Germany, May 20 - 23, 2014}, booktitle = {Proceedings - PERVASIVEHEALTH 2014: 8th International Conference on Pervasive Computing Technologies for Healthcare, Oldenburg Germany, May 20 - 23, 2014}, publisher = {Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering}, address = {Brussels}, isbn = {9781631900112}, doi = {10.4108/icst.pervasivehealth.2014.254934}, pages = {170 -- 173}, year = {2014}, language = {en} } @inproceedings{DielmannHuldtgren2015, author = {Dielmann, Steffen and Huldtgren, Alina}, title = {Eine haptische Lichtsteuerung f{\"u}r Senioren in Smart Environments}, series = {Mensch und Computer 2015 - Tagungsband}, booktitle = {Mensch und Computer 2015 - Tagungsband}, editor = {Pielot, Martin and Diefenbach, Sarah and Henze, Niels}, publisher = {De Gruyter}, address = {Berlin, M{\"u}nchen, Boston}, isbn = {9783110443929}, doi = {10.1515/9783110443929-035}, pages = {287 -- 290}, year = {2015}, language = {en} } @article{JacobsHuldtgren2021, author = {Jacobs, Naomi and Huldtgren, Alina}, title = {Why value sensitive design needs ethical commitments}, series = {Ethics and Information Technology}, volume = {23}, journal = {Ethics and Information Technology}, number = {1}, publisher = {Springer Nature}, issn = {1572-8439}, doi = {10.1007/s10676-018-9467-3}, pages = {23 -- 26}, year = {2021}, language = {en} } @inproceedings{HuldtgrenKlapperichEndter2022, author = {Huldtgren, Alina and Klapperich, Holger and Endter, Cordula}, title = {Next Steps for User Integration in ICT for Aging Well}, series = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health April 23-25, 2022}, booktitle = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health April 23-25, 2022}, editor = {Ziefle, Martina and Mulvenna, Maurice and Maciaszek, Leszek}, publisher = {SciTePress}, isbn = {978-989-758-566-1}, issn = {2184-4984}, doi = {10.5220/0011072700003188}, pages = {291 -- 298}, year = {2022}, language = {en} } @inproceedings{JonkerAydoğanBaarslagetal.2017, author = {Jonker, Catholijn M. and Aydoğan, Reyhan and Baarslag, Tim and Broekens, Joost and Detweiler, Christian A. and Hindriks, Koen V. and Huldtgren, Alina and Pasman, Wouter}, title = {An Introduction to the Pocket Negotiator: A General Purpose Negotiation Support System}, series = {Multi-Agent Systems and Agreement Technologies: 14th European Conference, EUMAS 2016, and 4th International Conference, AT 2016, Valencia, Spain, December 15-16, 2016}, volume = {Lecture Notes in Computer Science (LNCS, volume 10207)}, booktitle = {Multi-Agent Systems and Agreement Technologies: 14th European Conference, EUMAS 2016, and 4th International Conference, AT 2016, Valencia, Spain, December 15-16, 2016}, editor = {Criado Pacheco, Natalia and Carrascosa, Carlos and Osman, Nardine and Juli{\´a}n Inglada, Vicente}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-59294-7}, doi = {10.1007/978-3-319-59294-7_2}, pages = {13 -- 27}, year = {2017}, language = {en} } @inproceedings{AskariHuldtgrenIJsselsteijn2018, author = {Askari, Sima Ipakchian and Huldtgren, Alina and IJsselsteijn, Wijnand}, title = {Wear it or fear it: exploration of drivers \& barriers in smartwatch acceptance by senior citizens}, series = {Proceedings of the 4th International Conference on Information and Communication Technologies for Ageing Well and e-Health,IC T4AWE - Volume 1, 26-36, 2018, Funchal, Madeira, Portugal}, booktitle = {Proceedings of the 4th International Conference on Information and Communication Technologies for Ageing Well and e-Health,IC T4AWE - Volume 1, 26-36, 2018, Funchal, Madeira, Portugal}, editor = {Bamidis, P.D. and Ziefle, M. and Maciaszek, L.}, publisher = {SciTePress Digital Library}, isbn = {978-989-758-299-8}, doi = {10.5220/0006673000260036}, pages = {26 -- 36}, year = {2018}, language = {en} } @inproceedings{WohlmacherMertlKlapperichetal.2022, author = {Wohlmacher, Bernhard and Mertl, Fabian and Klapperich, Holger and Huldtgren, Alina}, title = {Hybrid Ludo: Combination of a Tangible UI for Seniors and a Web-based Ludo Game}, series = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health, April 23-25, 2022}, booktitle = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health, April 23-25, 2022}, editor = {Ziefle, Martina and Mulvenna, Maurice and Maciaszek, Leszek}, publisher = {SciTePress}, isbn = {978-989-758-566-1}, issn = {2184-4984}, doi = {10.5220/0011069500003188}, pages = {283 -- 290}, year = {2022}, language = {en} } @article{KatsimerouAlbedaHuldtgrenetal.2016, author = {Katsimerou, Christina and Albeda, Joris and Huldtgren, Alina and Heynderickx, Ingrid and Redi, Judith A.}, title = {Crowdsourcing Empathetic Intelligence: The Case of the Annotation of EMMA Database for Emotion and Mood Recognition}, series = {ACM Transactions on Intelligent Systems and Technology}, volume = {7}, journal = {ACM Transactions on Intelligent Systems and Technology}, number = {4}, publisher = {Association for Computing Machinery}, issn = {2157-6904}, doi = {10.1145/2897369}, pages = {1 -- 27}, year = {2016}, language = {en} } @inproceedings{HuldtgrenMertlVormannetal.2015, author = {Huldtgren, Alina and Mertl, Fabian and Vormann, Anja and Geiger, Chris}, title = {Probing the Potential of Multimedia Artefacts to Support Communication of People with Dementia}, series = {Human-Computer Interaction - INTERACT 2015}, volume = {Lecture Notes in Computer Science, vol. 9298}, booktitle = {Human-Computer Interaction - INTERACT 2015}, editor = {Abascal, Julio and Barbosa, Simone and Fetter, Mirko and Gross, Tom and Palanque, Philippe and Winckler, Marco}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-22698-9}, doi = {10.1007/978-3-319-22698-9_6}, pages = {71 -- 79}, year = {2015}, language = {en} } @article{MuellerBrummelBraun2021, author = {M{\"u}ller, Patrick and Brummel, Mattis and Braun, Alexander}, title = {Spatial recall index for machine learning algorithms}, series = {London Imaging Meeting}, volume = {2021}, journal = {London Imaging Meeting}, number = {1}, publisher = {Society for Imaging Science and Technology}, isbn = {0-89208-346-6}, doi = {10.2352/issn.2694-118X.2021.LIM-58}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-35657}, pages = {58 -- 62}, year = {2021}, abstract = {We present a novel metric Spatial Recall Index to assess the performance of machine-learning (ML) algorithms for automotive applications, focusing on where in the image which performance occurs. Typical metrics like intersection-over-union (IoU), precisionrecallcurves or average precision (AP) quantify the performance over a whole database of images, neglecting spatial performance variations. But as the optics of camera systems are spatially variable over the field of view, the performance of ML-based algorithms is also a function of space, which we show in simulation: A realistic objective lens based on a Cooke-triplet that exhibits typical optical aberrations like astigmatism and chromatic aberration, all variable over field, is modeled. The model is then applied to a subset of the BDD100k dataset with spatially-varying kernels. We then quantify local changes in the performance of the pre-trained Mask R-CNN algorithm. Our examples demonstrate the spatial dependence of the performance of ML-based algorithms from the optical quality over field, highlighting the need to take the spatial dimension into account when training ML-based algorithms, especially when looking forward to autonomous driving applications.}, language = {en} } @article{WittpahlDeeganBlacketal.2021, author = {Wittpahl, Christian and Deegan, Brian and Black, Bob and Braun, Alexander}, title = {An analytic-numerical image flicker study to test novel flicker metrics}, series = {Electronic Imaging: Society for Imaging Science and Technology}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {17}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2021.17.AVM-183}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-35671}, pages = {1 -- 8}, year = {2021}, language = {en} } @misc{HuldtgrenKatsimerouKuijstersetal.2015, author = {Huldtgren, Alina and Katsimerou, Christina and Kuijsters, Andre and Redi, Judith A. and Heynderickx, Ingrid E. J.}, title = {Design Considerations for Adaptive Lighting to Improve Seniors' Mood}, series = {ICOST 2015: Inclusive Smart Cities and e-Health}, volume = {ecture Notes in Computer Science, vol. 9102}, journal = {ICOST 2015: Inclusive Smart Cities and e-Health}, editor = {Geissb{\"u}hler, Antoine and Demongeot, Jacques and Mokhtari, Mounir and Abdulrazak, Bessam and Aloulou, Hamdi}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-19312-0}, doi = {10.1007/978-3-319-19312-0_2}, pages = {15 -- 26}, year = {2015}, language = {en} } @inproceedings{MertlMeisslerWieketal.2019, author = {Mertl, Fabian and Meißler, Nadine and Wiek, Lena and Fr{\"o}hlich, Alina and Huldtgren, Alina}, title = {"Traumreise" - Exploring the Use of Multisensory Digital Media in Dementia Groups}, series = {Proceedings of the 13th EAI International Conference on Pervasive Computing Technologies for Healthcare, Trento Italy May 20 - 23, 2019}, booktitle = {Proceedings of the 13th EAI International Conference on Pervasive Computing Technologies for Healthcare, Trento Italy May 20 - 23, 2019}, publisher = {Association for Computing Machinery}, address = {New York}, isbn = {9781450361262}, doi = {10.1145/3329189.3329199}, pages = {189 -- 197}, year = {2019}, language = {en} } @misc{Huldtgren2015, author = {Huldtgren, Alina}, title = {Design for Values in ICTInformation and communication technologies}, series = {Handbook of Ethics, Values, and Technological Design: Sources, Theory, Values and Application Domains}, journal = {Handbook of Ethics, Values, and Technological Design: Sources, Theory, Values and Application Domains}, editor = {van den Hoven, Jeroen and Vermaas, Pieter E. and van de Poel, Ibo}, publisher = {Springer}, address = {Dordrecht}, isbn = {978-94-007-6970-0}, doi = {10.1007/978-94-007-6970-0_35}, pages = {739 -- 767}, year = {2015}, language = {en} } @inproceedings{NeumannAdamBackesetal.2021, author = {Neumann, Hannah and Adam, Mario and Backes, Klaus and B{\"o}rner, Martin and Clees, Tanja and Doetsch, Christian and Glaeser, Susanne and Herrmann, Ulf and May, Johanna and Rosenthal, Florian and Sauer, Dirk Uwe and Stadler, Ingo}, title = {Development of open educational resources for renewable energy and the energy transition process}, series = {ISES SWC 2021: Solar World Congress Virtual Conference, 25.-29. Oktober 2021}, booktitle = {ISES SWC 2021: Solar World Congress Virtual Conference, 25.-29. Oktober 2021}, organization = {The International Solar Energy Society (ISES)}, doi = {10.18086/swc.2021.47.03}, year = {2021}, language = {en} } @inproceedings{Gottschald2021, author = {Gottschald, Joans}, title = {Data Driven Model Predictive Control of a District Heating Network}, series = {Smart Energy Systems International Conference 2021, 21.09.2021,}, booktitle = {Smart Energy Systems International Conference 2021, 21.09.2021,}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, year = {2021}, language = {en} } @techreport{Deckert2024, author = {Deckert, Carsten}, title = {Good Vibrations from Electronic Circuits: The Technological Development of the Synthesizer}, issn = {2941-4075}, doi = {10.20385/opus4-4439}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-44394}, pages = {28}, year = {2024}, language = {en} } @incollection{CelikKarabaş2022, author = {{\c{C}}elik, Fatma and Karaba{\c{s}}, Beyza}, title = {You don't talk about that!? - A survey on prospective social worker's knowledge on CSA and their use of media}, series = {Child Sexual Abuse and the Media}, booktitle = {Child Sexual Abuse and the Media}, editor = {Stelzmann, Daniela and Ischebeck, Josephine}, publisher = {Nomos Verlagsgesellschaft}, address = {Baden-Baden}, isbn = {978-3-7489-0440-3}, doi = {10.5771/9783748904403-123}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-44412}, publisher = {Hochschule D{\"u}sseldorf}, pages = {123 -- 134}, year = {2022}, abstract = {Well-trained professionals, like social workers, are essential for effective prevention of child sexual abuse (CSA). The present study assesses knowledge and knowledge acquisition regarding CSA in social work undergraduate students in a cross-sectional design. Three options for acquisition were assumed: 1) professional education, 2) media consumption, or 3) own experiences of CSA. Results indicated no improvement of knowledge through any of the prior mentioned sources and a high variability in knowledge. In contrast to expectations, personal experiences of CSA were associated with a higher threshold in recognition of CSA incidents. The meaning of the results for prevention and intervention are discussed by highlighting the role of taboos in professional education and the effects of media coverage.}, language = {en} } @article{BarbashovGellingsOezenetal.2024, author = {Barbashov, Maksim and Gellings, Markus and {\"O}zen, Semih and Jahr, Andreas}, title = {Hochgeschwindigkeitsverschleißtests an Scheibenm{\"a}hwerkmessern verschiedener Hersteller nach der Verschleißtopfmethode}, series = {Agricultural engineering.eu}, volume = {79}, journal = {Agricultural engineering.eu}, number = {2}, publisher = {Kuratorium f{\"u}r Technik und Bauwesen in der Landwirtschaft e. V. (KTBL)}, issn = {2943-5641}, doi = {10.15150/ae.2024.3311}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-44709}, pages = {95 -- 115}, year = {2024}, abstract = {Rotary mowers are ofen used for forage harvesting in agriculture, as this technology can achieve a high throughput. These knives are therefore exposed to high levels of wear and tear, and will also be ofen changed because of loss of material by bad cutting quality. That is why it is interesting to save costs during manufacturing in spite of a correspondingly long service life. This research records the current manufacturing quality of the mower blades and examines how they behave in comparison. Based on the obtained results, further decisions on the methods, procedures and ways of extending the life of the disc mower blades should be proposed. For the investigations, a test bench based on a wear pot was used. The wear that occurs on the blade is determined using several parameters and compared accordingly. The parameters of the test setup determined as a result of the test can be used for further studies of wear resistance.}, language = {en} } @inproceedings{MarziKlapperichHuldtgren2023, author = {Marzi, Karoline and Klapperich, Holger and Huldtgren, Alina}, title = {Insights on Older Adults' Willingness, Motives and Experiences regarding Participation in HCI research}, series = {MuC '23: Proceedings of Mensch und Computer 2023, Rapperswil Switzerland, September 3 - 6, 2023}, booktitle = {MuC '23: Proceedings of Mensch und Computer 2023, Rapperswil Switzerland, September 3 - 6, 2023}, editor = {Stolze, Markus and Loch, Frieder and Baldauf, Matthias and Alt, Florian and Schneegrass, Christina and Kosch, Thomas and Hirzle, Teresa and Sadeghian, Shadan and Draxler, Fiona and Bektas, Kenan and Lohan, Katrin and Knierim, Pascal}, publisher = {Association for Computing Machinery}, address = {New York}, isbn = {979-8-4007-0771-1}, doi = {10.1145/3603555.3608540}, pages = {432 -- 436}, year = {2023}, abstract = {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.}, language = {en} } @inproceedings{MuellerBraun2022, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {Simulating optical properties to access novel metrological parameter ranges and the impact of different model approximations}, series = {2022 IEEE International Workshop on Metrology for Automotive (MetroAutomotive), 4-6 July 2022}, booktitle = {2022 IEEE International Workshop on Metrology for Automotive (MetroAutomotive), 4-6 July 2022}, publisher = {IEEE}, isbn = {978-1-6654-6689-9}, doi = {10.1109/MetroAutomotive54295.2022.9855079}, pages = {133 -- 138}, year = {2022}, language = {en} } @article{KueppersBiermannSteffens2011, author = {K{\"u}ppers, Thomas and Biermann, Jan-Welm and Steffens, Jochen}, title = {Structurized sound design process of electric vehicle interior sound}, series = {The Journal of the Acoustical Society of America}, volume = {130}, journal = {The Journal of the Acoustical Society of America}, number = {4}, publisher = {AIP Publishing}, doi = {10.1121/1.3655178}, year = {2011}, language = {en} } @article{SteffensPetrenkoGuastavino2014, author = {Steffens, Jochen and Petrenko, Johannes and Guastavino, Catherine}, title = {Comparison of momentary and retrospective soundscape evaluations}, series = {Journal of the Acoustical Society of America}, volume = {135}, journal = {Journal of the Acoustical Society of America}, number = {2}, publisher = {AIP Publishing}, doi = {10.1121/1.4877121}, pages = {2187}, year = {2014}, language = {en} } @article{PreciadoLopezHuberGrigorievetal.2014, author = {Preciado L{\´o}pez, Magdalena and Huber, Florian and Grigoriev, Ilya and Steinmetz, Michel O. and Akhmanova, Anna and Koenderink, Gijsje H. and Dogterom, Marileen}, title = {Actin-microtubule coordination at growing microtubule ends}, series = {Nature Communications}, volume = {5}, journal = {Nature Communications}, publisher = {Springer Nature}, issn = {2041-1723}, doi = {10.1038/ncomms5778}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-34878}, pages = {4778}, year = {2014}, abstract = {To power dynamic processes in cells, the actin and microtubule cytoskeletons organize into complex structures. Although it is known that cytoskeletal coordination is vital for cell function, the mechanisms by which cross-linking proteins coordinate actin and microtubule activities remain poorly understood. In particular, it is unknown how the distinct mechanical properties of different actin architectures modulate the outcome of actin-microtubule interactions. To address this question, we engineered the protein TipAct, which links growing microtubule ends via end-binding proteins to actin filaments. We show that growing microtubules can be captured and guided by stiff actin bundles, leading to global actin-microtubule alignment. Conversely, growing microtubule ends can transport, stretch and bundle individual actin filaments, thereby globally defining actin filament organization. Our results provide a physical basis to understand actin-microtubule cross-talk, and reveal that a simple cross-linker can enable a mechanical feedback between actin and microtubule organization that is relevant to diverse biological contexts.}, language = {en} } @article{RuthHantschelLoepthienetal.2024, author = {Ruth, Nicolas and Hantschel, Florian and Loepthien, Tim and Randall, Will M. and Steffens, Jochen}, title = {The relation between technology acceptance and music listening: An experience sampling study}, series = {Jahrbuch Musikpsychologie}, volume = {32}, journal = {Jahrbuch Musikpsychologie}, publisher = {Leibniz Institute for Psychology (ZPID)}, issn = {2569-5665}, doi = {10.5964/jbdgm.181}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-44662}, pages = {1 -- 10}, year = {2024}, abstract = {In the intersection of technology and music listening, understanding user experiences is paramount. This research employed the Experience Sampling Method via the smartphone app MuPsych to continuously capture real-time data on individuals' music listening behaviors and related emotional responses. Over a span of two weeks, participants from Germany were prompted to report on various factors as they engaged in music listening, resulting in a rich dataset. Results indicate that Spotify Premium was the most frequently used music application, with personal playlists being the preferred listening format. To unravel the intricacies of these responses and their determinants, linear mixed-effects model analysis was utilized. Among the critical findings, the Perceived Usefulness and Perceived Ease of Use, two of the central constructs of the Technology Acceptance Model, emerged as significant predictors for the valence and enjoyment of the music experienced by users during the onset of music listening sessions. This highlights the imperative role of user-friendly interfaces in enhancing positive emotional states even before fully engaging with the music, underscoring the need for designers and developers of music-related apps to prioritise usability and useful functions.}, language = {en} } @article{PreciadoLopezHuberGrigorievetal.2014, author = {Preciado L{\´o}pez, Magdalena and Huber, Florian and Grigoriev, Ilya and Steinmetz, Michel O. and Akhmanova, Anna and Dogterom, Marileen and Koenderink, Gijsje H.}, title = {In vitro reconstitution of dynamic microtubules interacting with actin filament networks}, series = {Methods in Enzymology}, volume = {540}, journal = {Methods in Enzymology}, publisher = {Elsevier}, issn = {1557-7988}, doi = {10.1016/B978-0-12-397924-7.00017-0}, pages = {301 -- 320}, year = {2014}, language = {en} } @article{GeerkensSieberichsBraunetal.2024, author = {Geerkens, Simon and Sieberichs, Christian and Braun, Alexander and Waschulzik, Thomas}, title = {QI²: an interactive tool for data quality assurance}, series = {AI and Ethics}, volume = {4}, journal = {AI and Ethics}, publisher = {Springer Nature}, issn = {2730-5961}, doi = {10.1007/s43681-023-00390-6}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-42945}, pages = {141 -- 149}, year = {2024}, abstract = {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.}, language = {en} } @article{SieberichsGeerkensBraunetal.2024, author = {Sieberichs, Christian and Geerkens, Simon and Braun, Alexander and Waschulzik, Thomas}, title = {ECS: an interactive tool for data quality assurance}, series = {AI and Ethics}, volume = {4}, journal = {AI and Ethics}, publisher = {Springer Nature}, issn = {2730-5961}, doi = {10.1007/s43681-023-00393-3}, pages = {131 -- 139}, year = {2024}, abstract = {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.}, language = {en} } @article{BenimGuelAssmannetal.2016, author = {Benim, Ali Cemal and G{\"u}l, Fethi and Assmann, Alexander and Akhyari, Payam and Lichtenberg, Artur and Joos, Franz}, title = {Validation of loss-coefficient-based outlet boundary conditions for simulating aortic flow}, series = {Journal of Mechanics in Medicine and Biology}, volume = {16}, journal = {Journal of Mechanics in Medicine and Biology}, number = {2}, publisher = {World Scientific}, doi = {10.1142/s0219519416500111}, year = {2016}, language = {en} } @inproceedings{TiatorKerkmannGeigeretal.2020, author = {Tiator, Marcel and Kerkmann, Anna Maria and Geiger, Christian and Grimm, Paul}, title = {Using Semantic Segmentation to Assist the Creation of Interactive VR Applications}, series = {2020 IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR), Utrecht, 14.12.2020 - 18.12.2020}, booktitle = {2020 IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR), Utrecht, 14.12.2020 - 18.12.2020}, publisher = {IEEE}, isbn = {978-1-7281-7463-1}, doi = {10.1109/AIVR50618.2020.00011}, pages = {1 -- 9}, year = {2020}, language = {en} } @unpublished{MuenchPriesmannReichetal.2024, author = {M{\"u}nch, Justin and Priesmann, Jan and Reich, Marius and Tillmanns, Marius and Praktiknjo, Aaron and Adam, Mario}, title = {Uplifting the Complexity of Analysis for Probabilistic Security of Electricity Supply Assessments Using Artificial Neural Networks}, publisher = {Elsevier}, doi = {10.2139/ssrn.4770407}, year = {2024}, language = {en} } @article{MuellerBraun2023, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {Local performance evaluation of AI-algorithms with the generalized spatial recall index}, series = {tm - Technisches Messen}, volume = {90}, journal = {tm - Technisches Messen}, number = {7-8}, publisher = {De Gruyter}, issn = {2196-7113}, doi = {10.1515/teme-2023-0013}, pages = {464 -- 477}, year = {2023}, language = {en} } @book{NiemannPisla2021, author = {Niemann, J{\"o}rg and Pisla, Adrian}, title = {Life-Cycle Management of Machines and Mechanisms}, series = {Mechanisms and Machine Science}, volume = {90}, journal = {Mechanisms and Machine Science}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56447-6}, doi = {10.1007/978-3-030-56449-0}, year = {2021}, language = {en} } @incollection{MacherBrennerMessnarzetal.2020, author = {Macher, Georg and Brenner, Eugen and Messnarz, Richard and Ekert, Damjan and Stolfa, Jakub and Stolfa, Svatopluk and Niemann, J{\"o}rg and Fussenecker, Claudia and Schoening, Marius and Paul, Alexander and Pavlov, Nikolay and Gigov, Boyko and Pavlova, Maria Stefanova}, title = {A Study of Electric Powertrain Engineering - Its Requirements and Stakeholders Perspectives}, series = {Systems, Software and Services Process Improvement}, booktitle = {Systems, Software and Services Process Improvement}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4_29}, pages = {396 -- 407}, year = {2020}, language = {en} } @incollection{FusseneckerNiemannPauletal.2020, author = {Fussenecker, Claudia and Niemann, J{\"o}rg and Paul, Alexander and Schl{\"o}sser, Martin and Sch{\"o}ning, Marius}, title = {Educating Future Engineers - Meeting Challenges at Secondary School and University}, series = {Systems, Software and Services Process Improvement}, booktitle = {Systems, Software and Services Process Improvement}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4_56}, pages = {742 -- 753}, year = {2020}, language = {en} } @incollection{WendlandBumannMartinetal.2020, author = {Wendland, Andr{\´e} and Bumann, Marc and Martin, Shane and Niemann, J{\"o}rg and Bosman, Stephen}, title = {Optimizing System Design Through Thermal Analysis with Cubesatellite as Case Study}, series = {Systems, Software and Services Process Improvement}, booktitle = {Systems, Software and Services Process Improvement}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4_30}, pages = {408 -- 420}, year = {2020}, language = {en} } @incollection{KretschmarNiemannMueller2020, author = {Kretschmar, Dominik and Niemann, J{\"o}rg and M{\"u}ller, Felix}, title = {Spin-Off Strategies of Established Companies Due to Digitalization and Disruption}, series = {Systems, Software and Services Process Improvement}, booktitle = {Systems, Software and Services Process Improvement}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4_58}, pages = {772 -- 782}, year = {2020}, language = {en} } @incollection{NiemannFusseneckerSchloesser2020, author = {Niemann, J{\"o}rg and Fussenecker, Claudia and Schl{\"o}sser, Martin}, title = {Toolbox of Methods for the Digital Business Transformation}, series = {Systems, Software and Services Process Improvement}, booktitle = {Systems, Software and Services Process Improvement}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4_59}, pages = {783 -- 793}, year = {2020}, language = {en} } @inproceedings{DeckertKalefeldKutz2022, author = {Deckert, Carsten and Kalefeld, Jannik and Kutz, Martin}, title = {Business Model Innovation for the Internet of Things}, series = {Lecture Notes in Information Systems and Organisation: Digital Twins and New Business Models}, volume = {LNISO,volume 54}, booktitle = {Lecture Notes in Information Systems and Organisation: Digital Twins and New Business Models}, editor = {Kumar, Vikas and Leng, Jiewu and Akberdina, Victoria and Kuzmin, Evgeny}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-94617-3}, issn = {2195-4968}, doi = {10.1007/978-3-030-94617-3_23}, pages = {321 -- 333}, year = {2022}, language = {en} } @misc{OPUS4-3198, title = {Systems, Software and Services Process Improvement}, series = {Communications in Computer and Information Science}, volume = {1251}, journal = {Communications in Computer and Information Science}, editor = {Yilmaz, Murat and Niemann, J{\"o}rg and Clarke, Paul and Messnarz, Richard}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-030-56440-7}, doi = {10.1007/978-3-030-56441-4}, year = {2020}, language = {en} } @inproceedings{StoehrZielke2023, author = {St{\"o}hr, Marcel and Zielke, Thomas}, title = {Machine Learning for Soft Sensors and an Application in Cement Production}, series = {Smart, Sustainable Manufacturing in an Ever-Changing World Proceedings of International Conference on Competitive Manufacturing (COMA '22)}, volume = {Lecture Notes in Production Engineering}, booktitle = {Smart, Sustainable Manufacturing in an Ever-Changing World Proceedings of International Conference on Competitive Manufacturing (COMA '22)}, editor = {Leipzig, Konrad von and Sacks, Natasha and Mc Clelland, Michelle}, publisher = {Springer Nature Switzerland}, address = {Cham}, isbn = {978-3-031-15604-5}, doi = {10.1007/978-3-031-15602-1_46}, pages = {627 -- 638}, year = {2023}, language = {en} } @article{WohlersMuellerBraun2022, author = {Wohlers, Luis Constantin and M{\"u}ller, Patrick and Braun, Alexander}, title = {Original image noise reconstruction for spatially-varying filtered driving scenes}, series = {Electronic Imaging: Society for Imaging Science and Technology}, volume = {34}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {16}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2022.34.16.AVM-214}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41479}, pages = {1 -- 7}, year = {2022}, language = {en} } @article{WolfUlrichBraun2023, author = {Wolf, Dominik Werner and Ulrich, Markus and Braun, Alexander}, title = {Novel developments of refractive power measurement techniques in the automotive world}, series = {Metrologia}, volume = {60}, journal = {Metrologia}, number = {064001}, publisher = {IOP Publishing}, issn = {1681-7575}, doi = {10.1088/1681-7575/acf1a4}, year = {2023}, abstract = {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 Moir{\´e} 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.}, language = {en} } @article{MuellerBraun2023, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {MTF as a performance indicator for AI algorithms?}, series = {Electronic Imaging: Society for Imaging Science and Technology}, volume = {35}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {16}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2023.35.16.AVM-125}, pages = {1 -- 7}, year = {2023}, abstract = {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.}, language = {en} } @inproceedings{HuldtgrenMertlVormannetal.2016, author = {Huldtgren, Alina and Mertl, Fabian and Vormann, Anja and Geiger, Christian}, title = {Reminiscence of People with Dementia Mediated by a Tangible Multimedia Book}, series = {Proceedings of the International Conference on Information and Communication Technologies for Ageing Well and e-Health,, Rome, 21.04.2016 - 22.04.2016}, booktitle = {Proceedings of the International Conference on Information and Communication Technologies for Ageing Well and e-Health,, Rome, 21.04.2016 - 22.04.2016}, publisher = {SCITEPRESS - Science and Technology Publications}, isbn = {978-989-758-180-9}, doi = {10.5220/0005758801910201}, pages = {191 -- 201}, year = {2016}, language = {en} } @inproceedings{HuldtgrenVormannGeiger2015, author = {Huldtgren, Alina and Vormann, Anja and Geiger, Christian}, title = {Reminiscence Map - Insights to Design for People with Dementia from a Tangible Prototype}, series = {Proceedings of the 1st International Conference on Information and Communication Technologies for Ageing Well and e-Health, Lisbon, 20.05.2015 - 22.05.2015}, booktitle = {Proceedings of the 1st International Conference on Information and Communication Technologies for Ageing Well and e-Health, Lisbon, 20.05.2015 - 22.05.2015}, publisher = {SCITEPRESS - Science and Technology Publications}, isbn = {978-989-758-102-1}, doi = {10.5220/0005442702330242}, pages = {233 -- 242}, year = {2015}, language = {en} } @article{BergstroemElQasemMorville2021, author = {Bergstr{\"o}m, Aileen and El-Qasem, Kawthar and Morville, Anne-Le}, title = {JOS Special Issue: Occupational Science in Europe}, series = {Journal of Occupational Science}, volume = {28}, journal = {Journal of Occupational Science}, number = {1}, publisher = {Taylor \& Francis}, issn = {1442-7591}, doi = {10.1080/14427591.2021.1886644}, pages = {1 -- 5}, year = {2021}, language = {en} } @article{Gerhards2017, author = {Gerhards, Claudia}, title = {Product placement on YouTube: An explorative study on YouTube creators' experiences with advertisers}, series = {Convergence: The International Journal of Research into New Media Technologies}, volume = {25}, journal = {Convergence: The International Journal of Research into New Media Technologies}, number = {3}, publisher = {SAGE Publications}, issn = {1354-8565}, doi = {10.1177/1354856517736977}, pages = {516 -- 533}, year = {2017}, abstract = {During its process of diffusion, YouTube has become increasingly attractive for advertisers, not only in terms of classical commercials (like pre-roll ads) but also in terms of product placement opportunities. This article aims to explore the processes between YouTube creators and advertisers concerning product placement enquiries. For this purpose, YouTube creators from Germany ( n = 57) answered an online survey about their experiences with advertisers. The creators covered a wide range of YouTube channel genres (beauty, fashion, comedy, gaming, cooking) and differed in number of subscribers. Some creators who took part in the survey had less than 20,000 subscribers, others had between 20,000 and 500,000 subscribers and still others had more than 500,000 subscribers. How often do YouTube creators use product placement? Is paid-for placement an important source of finance for them? How professional are the relations and processes between YouTube creators and advertisers? Before presenting and discussing the results of the empirical survey of the current use of product placement, a brief history of how YouTube has become a marketing space for advertisers is provided.}, language = {en} } @article{KretschmarSchmiederNiemann, author = {Kretschmar, Dominik and Schmieder, Matthias and Niemann, J{\"o}rg}, title = {Knowledge Management Concept to Compensate a High Employee Fluctuation}, series = {Acta Technica Napocensis. Series: Applied Mathematics, Mechanics and Engineering}, volume = {61}, journal = {Acta Technica Napocensis. Series: Applied Mathematics, Mechanics and Engineering}, number = {III}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-44818}, pages = {483 -- 488}, abstract = {Knowledge is our most valuable asset! Due to the increasing fluctuation caused by demographic change, the change in society and the industry, companies are increasingly confronted with knowledge management. Therefore, companies have problems with carrying out projects effectively. There are several models, methods and tools to develop an effective concept for knowledge management. Can the process capability of projects be ensured despite high fluctuation? What appropriate methods and tools are available to manage knowledge? These and more questions are clarified in the course of this work and presented in a conceptual proposal.}, language = {en} } @article{PriesmannMuenchTillmannsetal.2024, author = {Priesmann, Jan and M{\"u}nch, Justin and Tillmanns, Marius and Ridha, E. and Spiegel, T. and Reich, Marius and Adam, Mario and Nolting, L. and Praktiknjo, Aaron}, title = {Artificial intelligence and design of experiments for resource adequacy assessment in power systems}, series = {Energy Strategy Reviews}, volume = {53}, journal = {Energy Strategy Reviews}, publisher = {Elsevier}, issn = {2211-467X}, doi = {10.1016/j.esr.2024.101368}, year = {2024}, language = {en} }