@inproceedings{PaulHerder2018, author = {Paul, Felix and Herder, Jens}, title = {A model-based filtering approach for real-time human motion data}, series = {Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 15. Workshop der GI-Fachgruppe VR/AR}, booktitle = {Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 15. Workshop der GI-Fachgruppe VR/AR}, editor = {Herder, Jens and Geiger, Christian and D{\"o}rner, Ralf and Grimm, Paul}, publisher = {Shaker Verlag}, address = {Herzogenrath}, isbn = {978-3-8440-6215-1}, doi = {10.2370/9783844062151}, pages = {37 -- 44}, year = {2018}, abstract = {Acquiring human motion data from video images plays an important role in the field of computer vision. Ground truth tracking systems require markers to create high quality motion data. But in many applications it is desired to work without markers. In recent years affordable hardware for markerless tracking systems was made available at a consumer level. Efficient depth camera systems based on Time-of-Flight sensors and structured light systems have made it possible to record motion data in real time. However, the gap between the quality of marker-based and markerless systems is high. The error sources of a markerless motion tracking pipeline are discussed and a model-based filter is proposed, which adapts depending on spatial location. The proposed method is then proven to be more robust and accurate than the unfiltered data stream and can be used to visually enhance the presence of an actor within a virtual environment in live broadcast productions.}, language = {en} } @techreport{ScherpFranzSaathoffetal.2009, author = {Scherp, Ansgar and Franz, Thomas and Saathoff, Carsten and Staab, Steffen}, title = {A Model of Events based on a Foundational Ontology}, series = {Arbeitsberichte aus dem Bereich Informatik}, journal = {Arbeitsberichte aus dem Bereich Informatik}, publisher = {Universit{\"a}t Koblenz-Landau}, address = {Koblenz}, organization = {Universit{\"a}t Koblenz-Landau}, issn = {1864-0850}, year = {2009}, language = {en} } @inproceedings{RosenkranzBurgmayerAckermannetal.2017, author = {Rosenkranz, Andreas and Burgmayer, Ralf and Ackermann, David and H{\"a}drich, Markus and Weinzierl, Stefan}, title = {A Mobile App for Room Acoustical Measurements}, series = {Fortschritte der Akustik - DAGA 2017: 43. Jahrestagung f{\"u}r Akustik}, booktitle = {Fortschritte der Akustik - DAGA 2017: 43. Jahrestagung f{\"u}r Akustik}, editor = {Schmidt, Gerhard and Nolte, Bodo and Heute, Ulrich}, publisher = {Kiel}, address = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, isbn = {978-3-939296-12-6}, pages = {235 -- 237}, year = {2017}, language = {en} } @techreport{KopsKhabyuk2007, author = {Kops, Manfred and Khabyuk, Olexiy}, title = {A methodology for the graphical exposition of broadcasting systems}, volume = {Arbeitspapiere des Instituts f{\"u}r Rundfunk{\"o}konomie an der Universit{\"a}t zu K{\"o}ln}, number = {231e}, publisher = {Inst. f{\"u}r Rundfunk{\"o}konomie, Univ. K{\"o}ln}, address = {K{\"o}ln}, organization = {Inst. f{\"u}r Rundfunk{\"o}konomie, Univ. K{\"o}ln}, isbn = {978-3-938933-34-3}, year = {2007}, language = {en} } @article{OcakciNiemannDraghici2025, author = {Ocakci, Elif and Niemann, J{\"o}rg and Draghici, George}, title = {A Method to Evaluate the Life Cycle Sustainability Value of Alternative Solution Designs}, series = {Acta Technica Napocensis; Series: Applied Mathematics, Mechanics and Engineering}, volume = {68}, journal = {Acta Technica Napocensis; Series: Applied Mathematics, Mechanics and Engineering}, number = {1S}, publisher = {Technical University of Cluj-Napoca}, issn = {2393-2988}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58290}, pages = {277 -- 284}, year = {2025}, abstract = {The paper focuses on developing an integrative methodology to evaluate environmental, economic, and social sustainability of alternative solution design options. Core approach is to extend the classic method of Quality Function Deployment (QFD) towards a holistic integrated model to overall evaluate the different aspects of all three pillars of sustainability (economy, ecology and social) across the product life cycle. The methods identify key aspects and allow users to consider and weigh different life cycle aspects in a overall scoring scheme.}, subject = {Nachhaltigkeit}, language = {en} } @misc{EilertSuckowPiontek2014, author = {Eilert, Eva and Suckow, Manfred and Piontek, Michael}, title = {A method for producing ectoine or a derivative thereof and a yeast cell for use as a host cell in such a method}, organization = {Artes Biotechnology GmbH}, year = {2014}, abstract = {Klassifikationen IPC C12N15/81; C12N15/82; C12P17/12; C12P7/42; CPC C12N15/815 (EP); C12P17/12 (EP);}, language = {en} } @article{WeinzierlLepaAckermann2018, author = {Weinzierl, Stefan and Lepa, Steffen and Ackermann, David}, title = {A measuring instrument for the auditory perception of rooms: The Room Acoustical Quality Inventory (RAQI)}, series = {The Journal of the Acoustical Society of America}, volume = {144}, journal = {The Journal of the Acoustical Society of America}, number = {3}, publisher = {Acoustical Society of America}, issn = {0001-4966}, doi = {10.1121/1.5051453}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58954}, pages = {1245 -- 1257}, year = {2018}, abstract = {With the Room Acoustical Quality Inventory (RAQI), a measuring instrument for the perceptual space of performance venues for music and speech has been developed. First, a focus group with room acoustical experts determined relevant aspects of room acoustical impression in the form of a comprehensive list of 50 uni- and bipolar items in different categories. Then, n = 190 subjects rated their acoustical impression of 35 binaurally simulated rooms from 2 listening positions, with symphonic orchestra, solo trumpet, and dramatic speech as audio content. Subsequent explorative and confirmative factor analyses of the questionnaire data resulted in three possible solutions with four, six, and nine factors of room acoustical impression. The factor solutions, as well as the related RAQI items, were tested in terms of reliability, validity, and several types of measurement invariance, and were cross-validated by a follow-up experiment with a subsample of 46\% of the original participants, which provided re-test reliabilities and stability coefficients for all RAQI constructs. The resulting psychometrically evaluated measurement instrument can be used for room quality assessment, acoustical planning, and the further development of room acoustical parameters in order to predict primary acoustical qualities of venues for music and speech.}, language = {en} } @inproceedings{LadwigGeiger2019, author = {Ladwig, Philipp and Geiger, Christian}, title = {A Literature Review on Collaboration in Mixed Reality}, series = {Smart Industry \& Smart Education. Proceedings of the 15th International Conference on Remote Engineering and Virtual Instrumentation}, volume = {Lecture Notes in Networks and Systems}, booktitle = {Smart Industry \& Smart Education. Proceedings of the 15th International Conference on Remote Engineering and Virtual Instrumentation}, editor = {Auer, Michael E. and Langmann, Reinhard}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-95677-0}, doi = {10.1007/978-3-319-95678-7_65}, pages = {591 -- 600}, year = {2019}, language = {en} } @inproceedings{VermeegenHerder2018, author = {Vermeegen, Kai and Herder, Jens}, title = {A Lighthouse-based Camera Tracking System for Professional Virtual Studios}, series = {Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 15. Workshop der GI-Fachgruppe VR/AR}, booktitle = {Workshop Proceedings / Tagungsband: Virtuelle und Erweiterte Realit{\"a}t - 15. Workshop der GI-Fachgruppe VR/AR}, editor = {Herder, Jens and Geiger, Christian and D{\"o}rner, Ralf and Grimm, Paul}, publisher = {Shaker Verlag}, address = {Herzogenrath}, isbn = {978-3-8440-6215-1}, doi = {10.2370/9783844062151}, pages = {19 -- 26}, year = {2018}, abstract = {This article describes the possibilities and problems that occur using the SteamVR tracking 2.0 system as a camera tracking system in a virtual studio and explains an approach for implementation and calibration within a professional studio environment. The tracking system allows for cost effective deployment. Relevant application fields are also mixed reality recording and streaming of AR and VR experiences.}, language = {en} } @article{GuoRuess2015, author = {Guo, Yujie and Ruess, Martin}, title = {A layerwise isogeometric approach for NURBS-derived laminate composite shells}, series = {Composite Structures}, volume = {124}, journal = {Composite Structures}, publisher = {Elsevier}, issn = {0263-8223}, doi = {10.1016/j.compstruct.2015.01.012}, pages = {300 -- 309}, year = {2015}, language = {en} }