@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{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{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{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} }