TY - JOUR A1 - Eurich, Bernhard A1 - Klenzner, Thomas A1 - Oehler, Michael T1 - Impact of room acoustic parameters on speech and music perception among participants with cochlear implants JF - Hearing research Y1 - 2019 U6 - https://doi.org/10.1016/j.heares.2019.03.012 VL - 377 SP - 122 EP - 132 PB - Elsevier ER - TY - JOUR A1 - Spiegel, Thomas T1 - Impact of Renewable Energy Expansion to the Balancing Energy Demand of Differential Balancing Groups JF - Journal of Sustainable Development of Energy, Water and Environment Systems N2 - The research addresses the present situation on the German electricity market caused by variable renewable energy sources. The increasing number of households with photovoltaic and battery storage systems and their impacts require special attention. These systems change the traditional electricity customer from the sole electricity consumer to an electricity producer and consumer in one person. These so-called prosumers differ in their actual electricity demand from the initially estimated electricity demand with standard load profile. This discrepancy results in deviations within a differential balancing group. Thereby, the main finding of this research is a significant higher balancing energy demand with the expansion of photovoltaic and battery storage systems. Hence, the standard load profile is particularly not suitable for differential balancing groups with a high penetration of solar systems and still less suitable for groups with solar and battery storage systems KW - Balance responsible party KW - Balancing energy KW - Differential balancing group KW - Electricity schedule registration KW - peer KW - Photovoltaic and battery storage systems KW - Prosumer KW - Standard load profile Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-29207 SN - 1848-9257 VL - 6 IS - 4 SP - 784 EP - 799 PB - SDEWES ER - TY - CHAP A1 - Müller, Patrick A1 - Braun, Alexander A1 - Keuper, Margret T1 - Impact of realistic properties of the point spread function on classification tasks to reveal a possible distribution shift T2 - NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA KW - chromatic aberration KW - corruption KW - Deep Neural Networks KW - Distribution Shift KW - MTF Y1 - 2022 UR - https://openreview.net/forum?id=r7WJpE3oy0 PB - NeurIPS CY - New Orleans ER - TY - JOUR A1 - Sidharth, K. Pillai A1 - Rajkumar, Mattacaud R. A1 - Chithrakumar, V. K. A1 - Asirvatham, Godson L. A1 - Benim, Ali Cemal A1 - Wogwises, Somchai T1 - Impact of increased outer wall rotation on convection in a vertical annulus with a stationary heated inner cylinder JF - Heat Transfer N2 - The interplay of centrifugal and buoyant forces on convective heat transfer in a vertical annulus formed by rotating adiabatic outer cylinder and stationary heated inner cylinder has been experimentally and numerically investigated. Experiments were performed for rotational speeds corresponding to the rotation parameter ζ in the range of 527 ≤ ζ ≤ 2860, maintaining the heat flux of the heated stationary inner cylinder as 80 W/m2, for radius ratio (η) and aspect ratio of the vertical annulus being 0.614 and 0.052, respectively. The problem was investigated numerically using the commercial computational fluid dynamics package, ANSYS CFX. The numerical methodology has been validated by comparing the numerically predicted average surface Nusselt number with experimentally obtained values. The comparison revealed an enhancement of the thermal performance of the heated stationary inner cylinder in the range 527 ≤ ζ ≤ 1190 due to the increase in turbulence intensity towards the heated inner cylinder. However, when the rotation parameter was increased further in the range 1190 ≤ ζ ≤ 2860, the thermal performance of the stationary heated inner cylinder showed only marginal improvement. The aforementioned thermal behavior of the inner heated stationary cylinder has been explored based on the flow statistics gathered from the numerical simulations. KW - Numerische Strömungssimulation KW - Nusselt-Zahl KW - Statischer Auftrieb KW - Zentrifugalkraft KW - Zylinder (Maschinenbau) KW - Wärmeübertragung Y1 - 2022 U6 - https://doi.org/10.1002/htj.22617 SN - 2688-4534 VL - 51 IS - 7 SP - 6656 EP - 6684 PB - Wiley ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Biswas, Nirmalendu A1 - Manna, Nirmal K A1 - Benim, Ali Cemal T1 - Impact of chimney divergence and sloped absorber on energy efficacy of a solar chimney power plant (SCPP) JF - Ain Shams Engineering Journal N2 - A numerical study is carried out meticulously to scrutinize the impact of different shapes of chimneys like circular (outer dia, dc), convergent (outer dia, 0.5dc), divergent (outer dia, 1.5dc), sudden contraction (outer dia, 0.5dc), and sudden expansion (outer dia, 1.5dc) on the performance of an SCPP. Furthermore, the parametric impact with different chimney divergence angles (CDA, ϕ), and ground absorber slope angle (GSA, γ) on the SCPP performance is also scrutinized. Optimum divergence angle (ϕ=+0.75◦) enhances the power generation up to ~ 47% (76 kW) with a horizontal ground absorber surface. An increase or decrease in CDA lessens the power generation. With a sloped ground absorber angle γ=0.6◦, the gain in power generation is 60% (82 kW). The study of combination of ground sloped absorber (γ=0.6◦) and divergent chimney (ϕ=+0.75◦) shows enhancement of the power generation upto 80% (92 kW) more than the classical Manzaranes plant. KW - Solar chimney power plant (SCPP) KW - Chimney divergence angle KW - Sloped absorber surface KW - Power generation KW - Efficiency KW - Regression analysis KW - DEAL KW - HSD Publikationsfonds Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42410 SN - 2090-4495 PB - Elsevier ER - TY - JOUR A1 - Kraus, Nicole A1 - Lindenberg, Julia A1 - Zeeck, Almut A1 - Kosfelder, Joachim A1 - Vocks, Silja T1 - Immediate Effects of Body Checking Behaviour on Negative and Positive Emotions in Women with Eating Disorders: An Ecological Momentary Assessment Approach JF - European eating disorders review : the journal of the Eating Disorders Association Y1 - 2015 U6 - https://doi.org/10.1002/erv.2380 VL - 23 IS - 5 SP - 399 EP - 407 PB - Wiley ER - TY - CHAP A1 - Spiegel, Thomas ED - The International Centre for Sustainable Development of Energy, Water and Environment Systems, T1 - Imbalance reduction of energy balancing groups as a means of renewable energy expansion - Optiosn for an active energy balancing group management T2 - 12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik Y1 - 2017 ER - TY - CHAP A1 - Siekmann, Leonard A1 - Steed, Clint Alex A1 - Mangaroo-Pillay, Mia A1 - Niemann, Jörg A1 - Fussenecker, Claudia T1 - Identifying the Industry 4.0 Skills Gap: A Comparative Analysis of Vocational Training in South Africa and Germany T2 - Advancing Learning Factories: Enabling Future-Ready Skills. Proceedings of the 15th Conference on Learning Factories 2025, Volume 1 KW - Industrie 4.0 KW - Berufliche Qualifikation KW - Deutschland KW - Südafrika Y1 - 2025 SN - 9783031988790 U6 - https://doi.org/10.1007/978-3-031-98880-6_26 SN - 2367-3370 VL - Lecture Notes in Networks and Systems, Bd. 1545 SP - 212 EP - 222 PB - Springer Nature CY - Cham ER - TY - CHAP A1 - Breuer, Christopher A1 - Drees, Tim A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Identification of potentials and locations for power-to-gas in germany T2 - 6. EUROSOLAR-Konferenz "Stadtwerke mit erneuerbaren Energien", 21.-22. Juni 2012, Heidelberg Y1 - 2012 SN - 978-3-00-037648-1 PB - Eurosolar CY - Berlin ER - TY - CHAP A1 - Voigt, Christian A1 - Misuraca, Gianluca A1 - Kucsera, Csaba A1 - Lipparini, Fiorenza T1 - ICT-enabled Social Innovations in Social Services: Mapping the Evidence T2 - 2016 Conference for E-Democracy and Open Government (CeDEM), 18.05.2016 - 20.05.2016, Krems, Austria Y1 - 2016 SN - 978-1-5090-1042-4 U6 - https://doi.org/10.1109/cedem.2016.15 SP - 105 EP - 114 PB - IEEE ER - TY - CHAP A1 - Treskunov, Anastasia A1 - Gerhardt, Emil A1 - Nowottnik, David A1 - Fischer, Ben A1 - Gerhardt, Laurin A1 - Säger, Mitja A1 - Geiger, Christian ED - Alt, Florian ED - Bulling, Andreas ED - Döring, Tanja T1 - ICAROSmuIti - A VR Test Environment for the Development of Multimodal and Multi-User Interaction Concepts T2 - Proceedings of Mensch und Computer 2019, MuC'19: Mensch-und-Computer, Hamburg, 08.09.2019-11.09.2019 Y1 - 2019 UR - https://dl.acm.org/doi/proceedings/10.1145/3340764 SN - 9781450371988 U6 - https://doi.org/10.1145/3340764.3345379 SP - 909 EP - 911 PB - ACM CY - New York ER - TY - CHAP A1 - Geiger, Christian A1 - Fritze, Robin A1 - Lehmann, Anke A1 - Stöcklein, Jörg ED - Schmidt, Albrecht ED - Gellersen, Hans ED - van den Hoven, Elise ED - Mazalek, Ali ED - Holleis, Paul ED - Villar, Nicolas T1 - HYUI: a visual framework for prototyping hybrid user interfaces T2 - Proceedings of the 2nd international conference on Tangible and embedded interaction - TEI '08, 18.02.2008 - 20.02.2008, Bonn Y1 - 2008 UR - http://portal.acm.org/citation.cfm?doid=1347390 SN - 9781605580043 U6 - https://doi.org/10.1145/1347390.1347406 PB - ACM Press CY - New York ER - TY - JOUR A1 - Maqableh, A. M. A1 - Ammourah, S. A. A1 - Khadrawi, A. F. A1 - Al-Nimr, M. A. A1 - Benim, Ali Cemal T1 - Hydrodynamics behaviour of a fluid flow in micro-venturi JF - Candian Journal of Physics Y1 - 2012 U6 - https://doi.org/10.1139/p11-145 VL - 90 IS - 1 SP - 83 EP - 89 PB - Canadian Science Publishing ER - TY - BOOK A1 - Stuhlsatz, André T1 - Hybride Spracherkennung Eine HMM/SVM-Systemintegration Y1 - 2008 SN - 9783639100624 PB - VDM Verlag CY - Saarbrücken ER - TY - CHAP A1 - Wohlmacher, Bernhard A1 - Mertl, Fabian A1 - Klapperich, Holger A1 - Huldtgren, Alina ED - Ziefle, Martina ED - Mulvenna, Maurice ED - Maciaszek, Leszek T1 - Hybrid Ludo: Combination of a Tangible UI for Seniors and a Web-based Ludo Game T2 - Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health, April 23-25, 2022 Y1 - 2022 SN - 978-989-758-566-1 U6 - https://doi.org/10.5220/0011069500003188 SN - 2184-4984 SP - 283 EP - 290 PB - SciTePress ER - TY - JOUR A1 - Steffens, Jochen A1 - Schulte-Fortkamp, Brigitte A1 - Becker-Schweitzer, Jörg T1 - Human-machine interaction as influencing factor of indoor soundscape evaluation JF - The Journal of the Acoustical Society of America Y1 - 2012 U6 - https://doi.org/10.1121/1.4708899 VL - 131 IS - 4 PB - AIP ER - TY - JOUR A1 - Stuhlsatz, André ED - Fellbaum, Klaus T1 - HSVM - A SVM Toolkit for Segmented Speech Data JF - Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2007 KW - Spracherkennung Y1 - 2007 UR - https://web.archive.org/web/20250718065024/https://www.essv.de/pdf/2007_107_114.pdf SN - 978-3-940046-40-6 SN - 0940-6832 SP - 107 EP - 114 ER - TY - CHAP A1 - Elvers, Paul A1 - Steffens, Jochen T1 - How empowering music influences performance and risk-behavior in sports: a randomized controlled trial T2 - Proceedings of the Congress of the International Association of Empirical Aesthetics (Wien, Österreich) Y1 - 2016 CY - Wien ER - TY - CHAP A1 - Dräger, Paul A1 - Steffens, Jochen A1 - von Berg, Markus T1 - How Does Lombard Speech Behave When The Background Noise Level Decreases? [Vortrag] T2 - Fortschritte der Akustik - DAGA 2024, 18. - 21. März 2024, Hannover N2 - The Lombard Effect and its impact on human speech production, also known as ‘Lombard Speech’, have been investigated in numerous scientific studies. It is known that the intensity, but also the type of background noise can affect Lombard Speech. By contrast, the potential effect of a gradual reduction of the amplitude of the background noise has received little attention in previous research. To test for such an effect, we split 34 participants into couples and had them orally compare images. In the experimental condition, there was background noise (masker) whose amplitude was reduced from 70 to 50 dB(A) over a period of 100 seconds. Measures of speech production after this decay were compared to those of a reference condition in which the masker was constantly at 50 dB(A). We hypothesized that speech production due to prior exposure to a louder masker would show a stronger expression of Lombard Speech in the experimental compared to the reference condition. The results showed a significant difference regarding the level of the first formant F1 across conditions, but not regarding the overall dB(A) level. However, tendencies could be identified, which can serve as a basis for further investigations. Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/files/upload/paper/135.pdf SN - 978-3-939296-22-5 SP - 1259 EP - 1262 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - GEN A1 - Steffens, Jochen A1 - Blättermann, Patrick A1 - Sattler, Maximilian A1 - Tang, Kevin T1 - How does a credible voice sound? [Project Repository] N2 - A project repository for the paper: Steffens, Blättermann, Sattler and Tang (2025, "How does a credible voice sound?"). It contains three components: the dataset, data analyses and the materials to elicit the speech data. KW - Sprechen KW - Glaubwürdigkeit KW - Akustik Y1 - 2025 UR - https://osf.io/mtcuh/ UR - https://opus4.kobv.de/opus4-hs-duesseldorf/frontdoor/index/index/docId/5313 U6 - https://doi.org/10.17605/OSF.IO/MTCUH PB - Open Science Framework ER - TY - JOUR A1 - Steffens, Jochen A1 - Blättermann, Patrick A1 - Sattler, Maximilian A1 - Tang, Kevin T1 - How does a credible voice sound? JF - The Journal of the Acoustical Society of America N2 - Credibility is a crucial social factor that influences people's perception and decision-making. This study explores the acoustic attributes that define credible speech compared to neutral and ironic speech. A custom-built German corpus was developed, containing speech samples recorded from amateurs to enhance ecological validity. The study extracted a broad set of audio features from these samples, employing recursive feature elimination to identify the most influential attributes. These were then analyzed using a machine-learning-supported multinomial logistic regression model. The results indicated significant differences in the acoustic features associated with credible speech compared to neutral and ironic speech. Key findings include the role of a higher energy level (1st mel-frequency cepstral coefficient) in credible compared to neutral and ironic speech and a higher speaking rate in both credible and ironic compared to neutral speech. Also, irony is characterized by more high-frequency content (mean spectral centroid) compared to credible or neutral speech. Gender differences in spoken irony involve a greater influence of speaking rate in women's speech, while high pitch plays a more significant role in men's speech. This research thus contributes to the understanding of how credibility is conveyed through speech and offers insights for applications in communication, media, and artificial intelligence. The study also highlights the methodological advancements made by incorporating a diverse range of acoustic features and employing a robust machine-learning framework. KW - Sprechen KW - Glaubwürdigkeit KW - Akustik Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-53133 SN - 1520-8524 VL - 157 IS - 5 SP - 3780 EP - 3792 PB - Acoustical Society of America ER - TY - CHAP A1 - Greb, Fabian A1 - Schlotz, Wolff A1 - Steffens, Jochen ED - Burger, B. ED - Bamford, J. ED - Carlson, E. T1 - How do the functions of music listening vary across situations and persons? T2 - SysMus 2016: Proceedings of the International Conference of Students of Systematic Musicology 16: Programme, abstracts & proceedings Y1 - 2016 PB - Department of Music, University of Jyväskylä & Finnish Centre for Interdisciplinary Music Research CY - Jyväskylä ER - TY - CHAP A1 - Karnop, Christoph A1 - Steffens, Jochen ED - Ginsborg, Jane ED - Lamont, Alexandra T1 - How do personality traits influence the effect of listening to sad music on induced musical emotions? T2 - Proceedings of the 25th Anniversary Conference of the European Society for the Cognitive Sciences of Music (ESCOM): “The expressive interaction with music” (Ghent, Belgium) Y1 - 2017 CY - Ghent ER - TY - CHAP A1 - Krämer, Andreas A1 - Kalka, Regine ED - Khare, Anshuman ED - Stewart, Brian ED - Schatz, Rod T1 - How Digital Disruption Changes Pricing Strategies and Price Models BT - Digital Disruption’s Role in Business Model Transformation T2 - Phantom Ex Machina KW - Preispolitik KW - Marketing Y1 - 2017 UR - http://link.springer.com/10.1007/978-3-319-44468-0_6 SN - 978-3-319-44467-3 SN - 978-3-319-44468-0 U6 - https://doi.org/10.1007/978-3-319-44468-0_6 SP - 87 EP - 103 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Dörries, Gundula A1 - Geiger, Christian A1 - Lehmann, Anke A1 - Wegstein, Andrea ED - Villar, Nicolas ED - Izadi, Shahram ED - Fraser, Mike ED - Benford, Steve T1 - HorseIO - virtual riding lessons with a low-cost tangible horse interface T2 - Proceedings of the 3rd International Conference on Tangible and Embedded Interaction - TEI '09, 16.02.2009 - 18.02.2009, Cambridge Y1 - 2009 UR - http://portal.acm.org/citation.cfm?doid=1517664 SN - 9781605584935 U6 - https://doi.org/10.1145/1517664.1517708 PB - ACM Press CY - New York ER - TY - JOUR A1 - Nehr, Sascha A1 - Bohn, Birger A1 - Fuchs, Hendrik A1 - Hofzumahaus, Andreas A1 - Wahner, Andreas T1 - HO2 formation from the OH + benzene reaction in the presence of O2 JF - Physical Chemistry Chemical Physics KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.1039/c1cp20334g SN - 1463-9076 VL - 13 IS - 22 PB - Royal Society of Chemistry (RSC) ER - TY - JOUR A1 - Groen, Jeroen P. A1 - Langelaar, Matthijs A1 - Sigmund, Ole A1 - Ruess, Martin T1 - Higher-order multi-resolution topology optimization using the finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2017 U6 - https://doi.org/10.1002/nme.5432 SN - 1097-0207 VL - 110 IS - 10 SP - 903 EP - 920 PB - Wiley ER - TY - CHAP A1 - Anton, Johan A1 - Nebel, Janine A1 - Froese, Christian A1 - Kleinschmidt, Ralph A1 - Quandt, Thomas A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin ED - Ernst, Stefan T1 - Higher alcohol synthesis over Na-modified Co-Cu catalysts: Co2C formation and effect of surface composition T2 - Preprints of the DGMK-Conference "Synthesis Gas Chemistry", October 7 - 9, 2015, Dresden N2 - Cu–Co-based model catalysts were prepared by a sophisticated alkali-free synthesis method and tested in the conversion of synthesis gas to higher alcohols. MoO3-coated alumina was used as the support, providing both high specific surface area and strongly interacting sites for the deposition of the active metals. A bulk Cu/Co ratio of ~2 was found to be most suitable in terms of activity and product distribution. Surface enrichment of Mo for all samples was observed by XPS, which significantly influenced the performance of the catalysts. Mo was found to be both a structural and a chemical promoter. Strong metal–support interactions were further achieved by modification of alumina with magnesia. With 12 wt% Mg incorporated, the catalysts showed 40% total oxygenate selectivity including 11% selectivity to ethanol. Y1 - 2015 SN - 978-3-941721-56-2 VL - DGMK Tagungsbericht, 2015,2 PB - DGMK CY - Hamburg ER - TY - JOUR A1 - Barbashov, Maksim A1 - Gellings, Markus A1 - Özen, Semih A1 - Jahr, Andreas T1 - High-speed wear tests on mower blade from various manufactures using the wear pot methode JF - Agricultural engineering.eu N2 - 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. Thatn 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. N2 - Bei der Grünfutterernte in der Landwirtschaft werden häufig Scheibenmähwerke eingesetzt, um einen hohen Durchsatz zu erzielen. Die dabei eingesetzten Messer sind einem hohen Verschleiß ausgesetzt und werden häufig wegen Verschleiß gewechselt, was sich in einer schlechten Schnittqualität widerspiegelt. Daher ist es interessant, bereits im Produktionsprozess Kosten einzusparen, ohne dabei die Lebensdauer der Messer zu beeinträchtigen. Diese Studie erfasst die aktuelle Fertigungsqualität von Mähmessern und untersucht, wie sie sich im Vergleich verhalten. Anhand der Ergebnisse sollen weitere Entscheidungen über Methoden, Verfahren und Wege zur Verlängerung der Lebensdauer von Rotorklingen vorgeschlagen werden. Für die Untersuchungen wurde ein Prüfstand auf der Basis des Verschleißtopfverfahrens verwendet. Der am Messer auftretende Verschleiß wird anhand mehrerer Parameter ermittelt und entsprechend verglichen. Die aus den Untersuchungen gewonnenen Parameter können für weiterführende Verschleißuntersuchungen genutzt werden. KW - Disc mower blades KW - rotary mower KW - slurry pot KW - ellipse-fit method Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44709 SN - 2943-5641 VL - 79 IS - 2 SP - 95 EP - 115 PB - Kuratorium für Technik und Bauwesen in der Landwirtschaft e. V. (KTBL) ER - TY - JOUR A1 - Fleiger, P. M. A1 - Reichardt, Roland A1 - Treiber, K. T1 - High-Precision Power Measurement for the Grindability Test According to Zeisel JF - Chemical Engineering & Technology Y1 - 2012 U6 - https://doi.org/10.1002/ceat.201200118 VL - 35 IS - 11 SP - 1941 EP - 1948 PB - Wiley ER - TY - JOUR A1 - Kaluza, Stefan A1 - Schröter, Marie Katrin A1 - Naumann d'Alnoncourt, Raoul A1 - Reinecke, Thomas A1 - Muhler, Martin T1 - High Surface Area ZnO Nanoparticles via a Novel Continuous Precipitation Route JF - Advanced Functional Materials Y1 - 2008 U6 - https://doi.org/10.1002/adfm.200800457 SN - 1616-3028 N1 - The authors gratefully acknowledge fruitful discussions with Malte Behrens and Robert Schlögl, and financial support by the BMBF (Bundesministerium für Bildung und Forschung, project 01RI05028 “Entwicklung von Methanolsynthesekatalysatoren als Basis für nachhaltige Ressourcennutzung”). Supporting Information is available online from Wiley InterScience or from the author. VL - 18 IS - 22 SP - 3670 EP - 3677 ER - TY - CHAP A1 - Flasko, Matthias A1 - Pogscheba, Patrick A1 - Herder, Jens A1 - Vonolfen, Wolfgang T1 - Heterogeneous binocular camera-tracking in a Virtual Studio T2 - 8. Workshop Virtuelle und Erweiterte Realität der GI-Fachgruppe VR/AR N2 - This paper presents a tracking of parts of a human body in a virtual TV studio environment. The tracking is based on a depth camera and a HD studio camera and aims at a realistic interaction between the actor and the computer generated environment. Stereo calibration methods are used to match corresponding pixels of both cameras (HD color and depth image). Hence the images were rectified and column aligned. The disparity is used to correct the depth image pixel by pixel. This image registration results in row and column aligned images where ghost regions are in the depth image resulting from occlusion. Both images are used to generate foreground masks with chroma and depth keying. The color image is taken for skin color segmentation to determine and distinguish the actor’s hands and face. In the depth image the flesh colored regions were used to determine their spatial position. The extracted positions were augmented by virtual objects. The scene is rendered correctly with virtual camera parameters which were calculated from the camera calibration parameters. Generated computer graphics with alpha value are combined with the HD color images. This compositing shows interaction with augmented objects for verification. The additional depth information results in changing the size of objects next to the hands when the actor moves around. KW - virtual studio KW - camera-tracking KW - VSVR Y1 - 2011 CY - Wedel ER - TY - JOUR A1 - Bayer, Markus A1 - Pabst, Andrea T1 - Heroes and victims: economies of entitlement after violent pasts JF - Peacebuilding KW - FBSK_Webseite Y1 - 2018 U6 - https://doi.org/10.1080/21647259.2017.1303868 N1 - The research for the article was conducted as part of the project ‘Nonviolent Resistance and Democratic Consolidation’ funded by the German Research Foundation. We would like to thank Benjamin T. Shannon, Peter Finkenbusch, Felix Bethke, Daniel Lambach and the two anonymous reviewers for commenting and editing. VL - 6 IS - 1 SP - 49 EP - 64 PB - Taylor & Francis ER - TY - JOUR A1 - Stelzmann, Daniela A1 - Çelik, Fatma A1 - Gerhold, Lars T1 - Help-seeking Behavior of Adolescents and Emerging Adults with Mental Health Problems During the COVID-19 Pandemic: A Scoping Review JF - Kindheit und Entwicklung: Zeitschrift für Klinische Kinderpsychologie N2 - Theoretical Background: The COVID-19 pandemic has negatively impacted the mental health of many adolescents and emerging adults (A and EA). Studies from before the COVID-19 pandemic document that A and EA with mental health problems rarely seek help. At the same time, studies suggest that the COVID-19 pandemic and the associated framework conditions also negatively impacted the help-seeking process for A and EA. Objective: This study provides a research synthesis on A’s and EA’s help-seeking process (in particular, help-seeking behavior) during the COVID-19 pandemic and identifies potential influencing factors on the help-seeking process. Method: We conducted a scoping review in accordance with the framework proposed by Arksey and O’Malley (2005) and adhered to the PRISMA Extension for Scoping Reviews Guidelines (Tricco et al., 2018) while analyzing the content of primary studies examining the help-seeking process of A and EA with mental health problems during the COVID-19 pandemic. Results: Fourteen primary studies met the inclusion criteria. The synthesized data indicate that increased psychological stress during the COVID-19 pandemic did not automatically lead to increased help-seeking behavior. Furthermore, we identified several factors influencing help-seeking behavior, such as personal factors (e. g., gender), factors linked to the social environment (e. g., open conversation style within the family), and structural factors (e. g., prolonged waiting periods) that influenced the help-seeking process. Notably, many of these factors had already been identified in prepandemic studies (e. g., gender). Discussion and conclusion: We discuss the results concerning possible prevention measures. N2 - Theoretischer Hintergrund: Präpandemische Studien zeigen, dass Jugendliche (J) und junge Erwachsene (JE) mit psychischen Problemen nur selten Hilfe in Anspruch nehmen. Gleichzeitig deuten Studien darauf hin, dass die COVID-19-Pandemie und die damit verbundenen Rahmenbedingungen negativ auf den Hilfesuchprozess von J und JE eingewirkt haben. Fragestellung: Ziel der Studie ist es, eine Studiensynthese über den Hilfesuchprozess von J und JE während der COVID-19 Pandemie zu erstellen und dabei potenzielle Einflussfaktoren auf den Hilfesuchprozess zu identifizieren. Methode: Wir haben ein Scoping Review nach den PRISMA-Richtlinien durchgeführt, in dem Primärstudien, die den Hilfesuchprozess von J und JE mit psychischen Problemen während der COVID-19 Pandemie dokumentieren, synthetisiert wurden. Ergebnisse: Die Synthese der Primärstudien (k = 14) zeigt, dass die erhöhte psychische Belastung durch die COVID-19-Pandemie sich nicht automatisch in erhöhtem Hilfesuchverhalten widerspiegelt. Dabei konnten mehrere Einflussfaktoren auf den Hilfesuchprozess identifiziert werden (z. B. Geschlecht, Mental Health Literacy, Stigma), die bereits aus präpandemischen Phasen bekannt sind. Diskussion und Schlussfolgerung: Wir diskutieren die Ergebnisse im Hinblick auf mögliche Präventionsmaßnahmen. KW - COVID-19 KW - Jugend KW - Mentale Gesundheit KW - Heranwachsender KW - Hilfesuchprozess KW - Scoping Review KW - FBSK_Webseite KW - HSD Publikationsfonds Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44536 SN - 0942-5403 SP - 224 EP - 235 PB - Hogrefe ER - TY - JOUR A1 - Thomas, Tanja A1 - Virchow, Fabian T1 - Hegemonic listening and doing memory on right-wing violence: Negotiating German political culture in public spheres JF - Philosophy & Social Criticism N2 - The first section of this chapter illustrates that the pogrom in Rostock-Lichtenhagen in 1992 has not been categorized sufficiently as a substantial milestone of right-wing violence in postwar Germany. This pogrom led to historically significant limitations in the right to asylum, ultimately resulting in a change to the German constitution. We propose to look at Rostock-Lichtenhagen as an example to explain that practices of remembering right-wing violence, a process that we describe with the term ‘Doing Memory on right-wing violence’, is a central part of creating a society’s basic story. This basic story, in turn, contributes to how a society understands itself. In this chapter’s second section, we argue first that analyzing practices of memory of right-wing violence, be they acknowledging, forgetting or suppressing those practices, actually make it possible to even expose the persistence of the basic story as a central element of political culture. Second, we want to uncover how potential and publicly effective interventions of and changes to the basic story might look like. Here, we build on Habermas’ model of democracy, utilize Susan Bickford’s work on listening as an important element in her political philosophy and refer to Benjamin Barber, who articulates that a participatory democracy requires political listening. As a result, our chapter’s third section demonstrates how listening can be conceptualized from a supra-individual perspective and how questions that are critical of existing hegemonic structures can prioritize a focus on hegemonic (non)listening. Lastly, we will sketch out strategies to intervene in hegemonic (non)listening. These strategies connect theoretically with concepts of ‘counter publics’ and ‘opinion forming publics’ and reference, among others, the work of Seyla Benhabib and Iris Marion Young, thus enabling the creation and execution of resistance practices of Doing Memory on right-wing violence. KW - Rechtsradikalismus KW - Politische Gewaltanwendung KW - Rostock-Lichtenhagen KW - Kollektives Gedächtnis KW - FBSK_Webseite Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46532 SN - 0191-4537 VL - 50 IS - 1 SP - 102 EP - 124 PB - Sage ER - TY - JOUR A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heating, Ventilation, Domestic Appliances – an Energy Integrated System Concept for the Household of the Future JF - Energy Y1 - 2021 U6 - https://doi.org/10.1016/j.energy.2021.121303 SN - 0360-5442 VL - 234 PB - Elsevier ER - TY - JOUR A1 - Maqableh, A. M. A1 - Khadrawi, A. F. A1 - Nimr, M. AlA. A1 - Ammourah, S. A. A1 - Benim, Ali Cemal T1 - Heat transfer characteristics of parallel and counter flow micro-channel heat exchangers with varying wall resistance JF - Progress in Computational Fluid Dynamics, An International Journal Y1 - 2011 U6 - https://doi.org/10.1504/pcfd.2011.042183 VL - 11 IS - 5 PB - inderscience ER - TY - CHAP A1 - Bhattacharyya, Suvanjan A1 - Jain, Naman A1 - Bhatt, Tapasvi A1 - Ghosh, Soumya A1 - Benim, Ali Cemal T1 - Heat Transfer Augmentation in a Mini-channel Using Magnetic Nanofluid and Magnetic Vortex T2 - Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, Düsseldorf, Germany KW - Wärmeübertragung KW - Numerische Strömungssimulation KW - Laminare Strömung KW - Magnetische Flüssigkeit KW - Magnetischer Flussschlauch Y1 - 2024 SN - 9783031666087 U6 - https://doi.org/10.1007/978-3-031-66609-4_1 SN - 2195-4356 VL - 2 SP - 3 EP - 11 PB - Springer Nature CY - Cham ER - TY - JOUR A1 - Bhattacharyya, Suvanjan A1 - Chattopadhyay, Himadri A1 - Banerjee, Arnab A1 - Benim, Ali Cemal T1 - Heat transfer and flow field in a circular twisted channel JF - MATEC Web of Conferences Y1 - 2018 U6 - https://doi.org/10.1051/matecconf/201824001005 VL - 240 PB - edp sciences ER - TY - JOUR A1 - Yalçınkaya, Orhan A1 - Durmaz, Ufuk A1 - Tepe, Ahmet Ümit A1 - Benim, Ali Cemal A1 - Uysal, Ünal T1 - Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array JF - Energies N2 - The main purpose of this investigation was to explore the heat transfer and flow characteristics of aero-foil-shaped fins combined with extended jet holes, specifically focusing on their feasibility in cooling turbine blades. In this study, a comprehensive investigation was carried out by applying impinging jet array cooling (IJAC) on a semi-circular curved surface, which was roughened using aerofoil-shaped fins. Numerical computations were conducted under three different Reynolds numbers (Re) ranging from 5000 to 25,000, while nozzle-to-target surface spacings (S/d) ranged from 0.5 to 8.0. Furthermore, an assessment was made of the impact of different fin arrangements, single-row (L1), double-row (L2), and triple-row (L3), on convective heat transfer. Detailed examinations were performed on area-averaged and local Nusselt (Nu) numbers, flow properties, and the thermal performance criterion (TPC) on finned and smooth target surfaces. The study’s results revealed that the use of aerofoil-shaped fins and the reduction in S/d, along with surface roughening, led to significant increases in the local and area-averaged Nu numbers compared to the conventional IJAC scheme. The most notable heat transfer enhancement was observed at S/d = 0.5 utilizing extended jets and the surface design incorporating aerofoil-shaped fins. Under these specific conditions, the maximum heat transfer enhancement reached 52.81%. Moreover, the investigation also demonstrated that the highest TPC on the finned surface was achieved when S/d = 2.0 for L2 at Re = 25,000, resulting in a TPC value of 1.12. Furthermore, reducing S/d and mounting aerofoil-shaped fins on the surface yielded a more uniform heat transfer distribution on the relevant surface than IJAC with a smooth surface, ensuring a relatively more uniform heat transfer distribution to minimize the risk of localized overheating. KW - Beschaufelung KW - Kühlung KW - aerofoil-shaped fin KW - impinging jet array KW - cooling of turbine blades KW - heat transfer uniformity KW - pin-fin row KW - Wärmeübertragung KW - Turbine Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46387 SN - 1996-1073 VL - 17 IS - 5 PB - MDPI ER - TY - CHAP A1 - Bleck, Christian ED - Schmitz, Daniela ED - Fiedler, Manfred ED - Becker, Heike ED - Habetur, Simone ED - Ortloff, Jan-Hendrik T1 - Healthy (Health-Equitable) Cities: Approaches to Participation and Inclusion in the Neighborhood T2 - Chronic Care – Science and Practice KW - FBSK_Webseite KW - Gesundheitsförderung KW - Prävention KW - Stadtviertel KW - Teilhabe KW - Gemeindeverwaltung Y1 - 2026 SN - 9783662722978 U6 - https://doi.org/10.1007/978-3-662-72298-5_50 SP - 403 EP - 413 PB - Springer Nature CY - Berlin, Heidelberg ER - TY - CHAP A1 - Herder, Jens A1 - Neider, Christian A1 - Kinuwaki, Shinichi T1 - HDR-based lighting estimation for virtual studio (TV) environments T2 - 10th International Conference on Human and Computer N2 - Two high dynamic range HDR environments maps based on video streams from fish-eye lens cameras are used for generating virtual lights in a virtual set renderer. The task of realistic virtual light setup of scenes using captured environment maps might be eased as well as visual quality improves. We discuss the light setting problem for virtual studio tv productions which have mixed scenes of real objects, actors, virtual objects and virtual backgrounds. Benefits of hdr interactive light control are that the real light in the studio does not have to be remodeled and the artistic impression by using the light in the studio is also captured. An analysis of system requirements identifies technical challenges. We discuss the properties of a prototype system including test production. KW - HDR environment maps KW - light interaction KW - tracking KW - virtual set environments KW - Virtual (TV) Studio KW - video processing KW - FHD KW - VSVR Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-16665 SP - 111 EP - 117 CY - Düsseldorf, Aizu-Wakamatsu ER - TY - JOUR A1 - Carapezza, M. L. A1 - Barberi, F. A1 - Ranaldi, M. A1 - Ricci, T. A1 - Tarchini, L. A1 - Barrancos, José A1 - Fischer, C. A1 - Granieri, D. A1 - Lucchetti, C. A1 - Melian, G. A1 - Perez, N. A1 - Tuccimei, P. A1 - Vogel, A. A1 - Weber, Konradin T1 - Hazardous gas emissions from the flanks of the quiescent Colli Albani volcano (Rome, Italy) JF - Applied Geochemistry KW - Luftreinhaltung Y1 - 2012 UR - https://doi.org/10.1016/j.apgeochem.2012.02.012 U6 - https://doi.org/10.1016/j.apgeochem.2012.02.012 VL - 27 IS - 9 SP - 1767 EP - 1782 PB - Elsevier ER - TY - JOUR A1 - Virchow, Fabian T1 - Hass-Rede-Freiheit – Medienhandeln der populistischen und extremen Rechten JF - Forschungsjournal Soziale Bewegungen N2 - Zunehmend werden Medien der extremen und populistischen Rechten als ‚Alternativmedien‘ bezeichnet; dieses politische Lager zielt unter dem Banner des Eintretens für die Meinungsfreiheit auf eine Ausweitung des Sagbaren (z. B. Rassismus, Antisemitismus) und zugleich eine Einschränkung liberaler und demokratischer Positionen. Ein breites Spektrum an Strategien und kommunikative Arsenalen sowie die mit der AfD verfügbaren Ressourcen erlauben eine erhebliche Ausweitung der Reichweite. KW - Rechtsradikalismus KW - Hassrede KW - Meinungsfreiheit KW - Kommunikationsstrategie KW - FBSK_Webseite Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-50575 SN - 2365-9890 VL - 38 IS - 1 SP - 55 EP - 69 PB - De Gruyter CY - Berlin, Boston ER - TY - RPRT A1 - Bhaiya, Madhur A1 - Jahr, Andreas A1 - Happel, Holger T1 - Harvesting-Combine-Flow Simulation Technique N2 - CFX 11.0 is a Computational Fluid Dynamics (CFD) program for simulating the behavior of systems involving fluid flow, heat transfer, and other related physical processes. It works by solving the equations of fluid flow (in a special form) over a region of interest, with specified (known) conditions on the boundary of that region. This tool is used here to analyse the straw cutter which is used to comminute the straw which is left standing in the field after stripper header has stripped the grains from the crops. Stripper Header is a new technique different to conventional harvester machines and it is still under development and testing. It works on the principle in which grains are first stripped off from the head of the standing crop which helps in much reduced intake freeing up the separation systems to handle a larger volume of grains. But with this, the new problem of the disposal of the long, uncut straw left after stripping of grains arose. So a straw cutter is used after the stripper header stage in this Combine Harvester, where the rotor is equipped with pressed steel blades and rotates towards the crop, i.e., it cuts and lifts the straw over the top. This technique is environment friendly because previously farmers would have to burn the long, uncut straw standing in the fields while in this case mulched straw can be used for min-till systems. This rotor based straw cutting machine is analysed here which helps us in increasing power efficiency and comminution rate and quality of cut straw particles. Here fluid flow simulation has been preferred over particle simulation: - CFX 10.0 tool is not very effective for particle simulation techniques and computation time is increased considerably. - It’s very hard to realize particle simulation in CFX 10.0 because we have to define size and properties of each particle and besides this wall conditions would have to be defined differently for every boundary. - Besides this, it’s hard to realize cutting effect with straw particles in CFX 10.0 which otherwise would be comminuted in real life conditions. - The results obtained from fluid simulation are validated using experimental results and found to be nearly the same which clearly contradicts any need of performing particle simulation. KW - Häckseln KW - Ernte KW - Stroh KW - Partikelstrom KW - CFD KW - chaff KW - harvesting KW - Particle flow KW - simulation KW - FHD Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-4239 CY - Düsseldorf ER - TY - BOOK A1 - Huber, Florian T1 - Hands-on Introduction to Data Science with Python N2 - In today’s world, data is generated at an unprecedented pace, and our ability to harness it is changing the way we live, work, and even think. Data science, the interdisciplinary field that blends statistics, computer science, and domain-specific knowledge, empowers us to extract insights from this vast ocean of data. As data science becomes increasingly essential across various industries and sectors, there is a growing need for skilled professionals who can make sense of data and transform it into actionable information. This book is designed to give you a very broad and at the same time a very practical hands-on tour through the full spectrum of data science approaches KW - Data Science KW - Python (Programmiersprache) KW - Lehrmittel Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-49548 N1 - The DOI represents all versions, and will always resolve to the latest one. The online version of this book can be found here: https://florian-huber.github.io/data_science_course/book/intro.html All materials and source code to render the book can be found on GitHub: https://github.com/florian-huber/data_science_course PB - Zenodo ET - v0.21 ER - TY - CHAP A1 - Voigt, Christian A1 - Mair, Sebastian A1 - Unterfrauner, Elisabeth ED - Bodrunova, Svetlana S. T1 - Hacking the Knowledge of Maker Communities in Support of 21st Century Education T2 - Internet Science Y1 - 2018 SN - 978-3-030-01436-0 U6 - https://doi.org/10.1007/978-3-030-01437-7_22 VL - Lecture Notes in Computer Science: 11193 SP - 286 EP - 299 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Fischer, Peter C. A1 - Fassbach, Burkhard T1 - Guest Post: The German D&O Procurement Clause Revisited JF - The D&O Diary: A Periodic Journal Containing Items of Interest From the World of Directors & Officers Liability, With Occasional Commentary KW - Organhaftung KW - Vorstandsmitglied Y1 - 2024 UR - https://web.archive.org/web/20250417174603/https://www.dandodiary.com/2024/05/articles/d-o-insurance/guest-post-the-german-do-procurement-clause-revisited/ ER - TY - JOUR A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Guaranteed stability in optimal power generation dispatching under uncertainty JF - IEEE Transactions on Power Systems N2 - Stability and cost optimality of power generation and supply systems must not be considered independently from one another. Simple examples show that optimizing cost without considering stability may result in modes of operation that, while economically optimal, are unstable. We demonstrate that stability, robustness, and optimality can be considered systematically and simultaneously by combining bifurcation theory and nonlinear optimization. Essentially, the proposed method enforces a backoff distance between the optimal point of operation and operational or stability boundaries in the space of the optimization variables, where bifurcation theory is used to describe nonlinear stability boundaries. KW - Normal vector method KW - Power dispatch KW - Robust optimization KW - Stability KW - Unit commitment Y1 - 2013 U6 - https://doi.org/10.1109/TPWRS.2012.2207970 SN - 1558-0679 VL - 28 IS - 2 SP - 1103 EP - 1112 PB - IEEE ER - TY - JOUR A1 - Huber, Florian A1 - Käs, Josef A1 - Stuhrmann, Björn T1 - Growing actin networks form lamellipodium and lamellum by self-assembly JF - Biophysical Journal N2 - Many different cell types are able to migrate by formation of a thin actin-based cytoskeletal extension. Recently, it became evident that this extension consists of two distinct substructures, designated lamellipodium and lamellum, which differ significantly in their kinetic and kinematic properties as well as their biochemical composition. We developed a stochastic two-dimensional computer simulation that includes chemical reaction kinetics, G-actin diffusion, and filament transport to investigate the formation of growing actin networks in migrating cells. Model parameters were chosen based on experimental data or theoretical considerations. In this work, we demonstrate the system's ability to form two distinct networks by self-organization. We found a characteristic transition in mean filament length as well as a distinct maximum in depolymerization flux, both within the first 1-2 microm. The separation into two distinct substructures was found to be extremely robust with respect to initial conditions and variation of model parameters. We quantitatively investigated the complex interplay between ADF/cofilin and tropomyosin and propose a plausible mechanism that leads to spatial separation of, respectively, ADF/cofilin- or tropomyosin-dominated compartments. Tropomyosin was found to play an important role in stabilizing the lamellar actin network. Furthermore, the influence of filament severing and annealing on the network properties is explored, and simulation data are compared to existing experimental data. KW - Open Archive Y1 - 2008 UR - http://www.ncbi.nlm.nih.gov/pubmed/18708450 U6 - https://doi.org/10.1529/biophysj.108.134817 SN - 1542-0086 VL - 95 IS - 12 SP - 5508 EP - 5523 PB - Biophysical Society ER - TY - CHAP A1 - Galle, Bo A1 - Arellano, Santiago A1 - Conde, Vladimir A1 - Pfeffer, Melissa A1 - Barsotti, Sara A1 - Stefansdottir, Gerður A1 - Bergsson, Baldur A1 - Bergsson, Bergur A1 - Ingvarsson, Thorgils A1 - Weber, Konradin T1 - Ground based measurements of the gas emission from the Holuhraun volcanic fissure eruption on Iceland 2014/2015 T2 - Geophysical Research Abstracts: EGU General Assembly 2015 N2 - The since 31 August 2014 ongoing volcanic eruption at Holuhraun on Iceland is by far the strongest source of sulfur dioxide in Europe over the last 230 years with sustained emission rates exceeding 100 000 ton/day. This gas emission severely affects local population and has become a concern also for air traffic. The eruption has in December continued at constant pace for 3.5 months. Three scenarios are envisaged for the future; (1) the eruption stops, (2) the fissure extends under the Vattnajökul glacier and (3) Bardarbunga volcano erupts. The two later scenarios will cause increased gas emission, severe ash emissions and extended flooding. Under the scope of the EU-project FUTUREVOLC, a project with 3.5 years duration, aiming at making Iceland a supersite for volcanological research as a European contribution to GEO, we are developing a version of the Scanning DOAS instrument that is adapted to high latitudes with low UV radiation and severe meteorological conditions. Since the first day of the eruption several of these novel instruments has been monitoring the SO2 emission from the eruption. Data from our instruments are still after 3.5 months the only sustained ground-based monitoring of this gas emission. A lot of work is however needed to sustain this operation at a very remote site and under severe field conditions. At the same time the very high concentrations in the gas plume, in combination with bad meteorological conditions require the development of novel methods to derive reliable flux estimates. In this presentation we will discuss the instrumental issues and present the latest version of the emission estimates made from our measurements. KW - Luftreinhaltung KW - Vulkanismus KW - Messtechnik KW - Schwefeldioxid Y1 - 2015 UR - https://web.archive.org/web/20240616051633/https://meetingorganizer.copernicus.org/EGU2015/EGU2015-1722-1.pdf N1 - Vortragsabstract VL - 17 PB - Copernicus CY - Göttingen ER - TY - RPRT A1 - Niemann, Jörg A1 - Bruckmann, Julian A1 - Krautzer, Florian T1 - Green City Deals: A study on the global warming potential of alternative urban transportation systems N2 - The population is growing constantly in urban areas. This results in an increasing demand for mobility solutions while it is also worldwide aimed to reduce greenhouse gas emissions. This paper summarizes the results of a comparative study concerning the greenhouse gas emissions (based on carbon footprint) caused by alternative urban passenger transportation systems. The emissions for the vehicles and their infrastructure are analyszed over the entire life cycle from manufacturing up to their end of life. An existing cable car sytem in La Paz, Bolivia was analysed and evaluated in comparison to other modes of transportation such as small busses, large busses and a tram. According to the system definitions and the considered balance framework the study shows that beside the use of the systems the materials and the manufacturing as well as the infrastructure have a significant impact on the total emissions over the life cycle. To put focus on the „true and real“ impacts to the society it is preferable to consider the measurement results in total absolute emissions. KW - Carbon footprint KW - urban mobility KW - cable car KW - bus KW - tram KW - transport planning KW - city planning Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-28972 CY - Düsseldorf ER - TY - CHAP A1 - Jandura, Olaf A1 - Weinmann, Carina ED - Ziegele, Marc ED - Kümpel, Anna Sophie ED - Dienlin, Tobias T1 - Greater Confusion in the Voter Market in Germany: Differences Between Subjective and Value-Based Categorization on the Left-Right Axis T2 - Jahrestagung der DGPuK-Fachgruppe Rezeptions- und Wirkungsforschung 2022: Tagungsband N2 - In den letzten Jahren war häufig von einem Rechtsruck in der Gesellschaft die Rede (O. Decker et al., 2016). Bevölkerungsrepräsentative Umfragedaten belegen diese These jedoch nicht. Weder die Allgemeine Bevölkerungsumfrage der Sozialwissenschaften (ALLBUS) noch der European Social Survey zeigen für die letzten Jahrzehnte signifikante Veränderungen in der Selbstpositionierung der Befragten auf der Links-Rechts-Skala. Dies wirft die Frage auf, ob es sich bei dem behaupteten gesellschaftlichen Rechtsruck um ein soziologisches Wahrnehmungsphänomen handelt, das durch die intensive öffentliche Debatte verstärkt wird, oder ob Zweifel an der Validität der politischen Selbstpositionierung auf der Links-Rechts-Skala angebracht sind. Der vorliegende Artikel befasst sich mit der letzteren Frage. Unsere Analysen ergaben, dass bei 31 % der Befragten in unserer Stichprobe eine Divergenz zwischen der subjektiven Positionierung auf der Links-Rechts-Skala und einer wertbezogenen Positionierung besteht. Wir erörtern, welche Variablen diese Divergenz erklären können und welche Konsequenzen daraus für die kommunikationswissenschaftliche Forschung gezogen werden können. N2 - In recent years, there has been frequent talk of a shift to the right in society (O. Decker et al., 2016). However, population-representative survey data do not substantiate this thesis, with neither the German General Social Survey (ALLBUS) nor the European Social Survey showing any significant changes in respondents’ self-positioning on the left-right axis over the past decades. This raises the question of whether the purported societal shift to the right is a sociological perceptual phenomenon that is magnified due to intense public debate, or whether doubts about the validity of the question on political self-positioning on the left-right scale are warranted. The present article addresses the latter issue. Our analyses revealed a divergence between subjective positioning on the left-right axis and value-based positioning for 31% of respondents in our sample. We further discuss which variables may explain this divergence and what consequences can be drawn for research in communication science. KW - left-right scale KW - subjective positioning KW - value-based positioning KW - political values KW - Links-Rechts-Skala KW - subjektive Positionierung KW - wertbasierte Positionierung KW - politische Werte KW - Politische Einstellung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-56419 SP - 75 EP - 92 PB - SSOAR CY - Düsseldorf ER - TY - JOUR A1 - Shajahan, Mohamed Iqbal A1 - Benim, Ali Cemal T1 - Granular PCM based heat sink for electronics thermal management JF - Applied Thermal Engineering N2 - This study investigates aluminum heat sinks integrated with GR42 phase change material (PCM), aiming to enhance thermal inertia and stabilize device temperatures. This is important, since the increasing miniaturization and performance demands for electronic devices have led in a growing need for advanced thermal management systems capable of handling rapid transient loads. The novelty of the work lies in examining different heat sink layouts that optimize the heat dissipation capabilities of GR42 PCMs while minimizing size and weight for electronic cooling. The experimental testing was conducted using three configurations, namely no fin, circular fin and hexagonal fin, with three input powers (4 W, 8 W, and 12 W). The experimental results show that the hexagonal-fin heat sink, surface area is 25 % more than circular fins, exhibited superior thermal performance without significant variation in input power. Notably, the hexagonal-fin heat sink achieved the desired set point temperature of 55 ◦C in 33 % less time than the circular-fin design and 45 % less time than the heat sink without fins. Furthermore, the peak temperatures increased up to 21 % for circular fins. During the charging cycles, the enhancement ratios vary from 72 % and begin to narrow to 25 % during discharge cycles. The hexagonal-fin configuration also exhibited superior melting dynamics, completing the phase transition 44 % faster at higher input power than the circular fins, and established a thermal deviation of nearly 51 % less than finless heat sinks. These findings underscore the critical role of fin geometry and PCM integration in achieving uniform temperature distribution and improved energy storage efficiency. Overall, the hexagonal-fin heat sink with GR42 PCM shows strong potential as a passive cooling solution for low-power portable electronic devices. KW - Heat sinks KW - Portable electronic cooling KW - Latent heat storage KW - GR42 PCM KW - Hexagonal fin KW - Circular fin KW - HSD Publikationsfonds KW - DFG Publikationskosten Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-59649 SN - 1359-4311 VL - 286 PB - Elsevier ER - TY - INPR A1 - Yuwono, Steve A1 - Löppenberg, Marlon A1 - Schwung, Dorothea A1 - Schwung, Andreas T1 - Gradient-based Learning in State-based Potential Games for Self-Learning Production Systems T2 - arxiv N2 - In this paper, we introduce novel gradient-based optimization methods for state-based potential games (SbPGs) within self-learning distributed production systems. SbPGs are recognised for their efficacy in enabling self-optimizing distributed multi-agent systems and offer a proven convergence guarantee, which facilitates collaborative player efforts towards global objectives. Our study strives to replace conventional ad-hoc random exploration-based learning in SbPGs with contemporary gradient-based approaches, which aim for faster convergence and smoother exploration dynamics, thereby shortening training duration while upholding the efficacy of SbPGs. Moreover, we propose three distinct variants for estimating the objective function of gradient-based learning, each developed to suit the unique characteristics of the systems under consideration. To validate our methodology, we apply it to a laboratory testbed, namely Bulk Good Laboratory Plant, which represents a smart and flexible distributed multi-agent production system. The incorporation of gradient-based learning in SbPGs reduces training times and achieves more optimal policies than its baseline. KW - Machine Learning KW - Artificial Intelligence KW - Computer Science and Game Theory KW - Maschinelles Lernen KW - Künstliche Intelligenz KW - Spieltheorie Y1 - 2024 U6 - https://doi.org/10.48550/arXiv.2406.10015 PB - arxiv ER - TY - CHAP A1 - Becker, Martin A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Gradient Descent Analysis: On Visualizing the Training of Deep Neural Networks T2 - VISIGRAPP 2019: Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications : Prague, Czech Republic, February 25-27, 2019 Y1 - 2019 SN - 978-989-758-354-4 U6 - https://doi.org/10.5220/0007583403380345 VL - Volume: 3 SP - 338 EP - 345 PB - INSTICC ER - TY - RPRT A1 - Deckert, Carsten T1 - Good Vibrations from Electronic Circuits: The Technological Development of the Synthesizer T3 - Business Cases in Industrial Engineering - 4 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44394 SN - 2941-4075 ER - TY - JOUR A1 - de Jonge, Niek F. A1 - Mildau, Kevin A1 - Meijer, David A1 - Louwen, Joris J. R. A1 - Bueschl, Christoph A1 - Huber, Florian A1 - van der Hooft, Justin J. J. T1 - Good practices and recommendations for using and benchmarking computational metabolomics metabolite annotation tools JF - Metabolomics N2 - Background Untargeted metabolomics approaches based on mass spectrometry obtain comprehensive profiles of complex biological samples. However, on average only 10% of the molecules can be annotated. This low annotation rate hampers biochemical interpretation and effective comparison of metabolomics studies. Furthermore, de novo structural characterization of mass spectral data remains a complicated and time-intensive process. Recently, the field of computational metabolomics has gained traction and novel methods have started to enable large-scale and reliable metabolite annotation. Molecular networking and machine learning-based in-silico annotation tools have been shown to greatly assist metabolite characterization in diverse fields such as clinical metabolomics and natural product discovery. Aim of review We highlight recent advances in computational metabolite annotation workflows with a special focus on their evaluation and comparison with other tools. Whilst the progress is substantial and promising, we also argue that inconsistencies in benchmarking different tools hamper users from selecting the most appropriate and promising method for their research. We summarize benchmarking strategies of the different tools and outline several recommendations for benchmarking and comparing novel tools. Key scientific concepts of review This review focuses on recent advances in mass spectral library-based and machine learning-supported metabolite annotation workflows. We discuss large-scale library matching and analogue search, the current bloom of mass spectral similarity scores, and how molecular networking has changed the field. In addition, the potentials and challenges of machine learning-supported metabolite annotation workflows are highlighted. Overall, recent developments in computational metabolomics have started to fundamentally change metabolomics workflows, and we expect that as a community we will be able to overcome current method performance ambiguities and annotation bottlenecks. KW - Metabolomik KW - Massenspektrometrie KW - Maschinelles Lernen KW - Benchmarking KW - Mass fragmentation spectra Y1 - 2022 U6 - https://doi.org/10.1007/s11306-022-01963-y SN - 1573-3890 VL - 18 IS - 12 PB - Springer Nature ER - TY - CHAP A1 - Geiger, Christian A1 - Thiele, Simon A1 - Meyer, Laurid A1 - Meyer, Stefan A1 - Hören, Lutz A1 - Drochtert, Daniel ED - Reidsma, Dennis ED - Katayose, Haruhiro ED - Nijholt, Anton T1 - Goin’ Goblins - Iterative Design of an Entertaining Archery Experience T2 - Advances in Computer Entertainment. 10th International Conference, ACE 2013, Boekelo, The Netherlands, November 12-15, 2013. Proceedings Y1 - 2013 SN - 978-3-319-03160-6 U6 - https://doi.org/10.1007/978-3-319-03161-3_20 VL - 8253 SP - 284 EP - 295 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Virchow, Fabian ED - Fischer, Jörg ED - Dunn, Kerry T1 - Globalization, Crisis, and Right-Wing Populism in Context T2 - Stifled Progress – International Perspectives on Social Work and Social Policy in the Era of Right-Wing Populism Y1 - 2019 SN - 9783847413233 SP - 59 EP - 70 PB - Verlag Barbara Budrich CY - Opladen ER - TY - JOUR A1 - Migueles, Jairo H. A1 - Rowlands, Alex V. A1 - Huber, Florian A1 - Sabia, Séverine A1 - van Hees, Vincent T. T1 - GGIR: A Research Community–Driven Open Source R Package for Generating Physical Activity and Sleep Outcomes From Multi-Day Raw Accelerometer Data JF - Journal for the Measurement of Physical Behaviour Y1 - 2019 U6 - https://doi.org/10.1123/jmpb.2018-0063 SN - 2575-6605 VL - 2 IS - 3 SP - 188 EP - 196 PB - Human Kinetics ER - TY - CHAP A1 - Virchow, Fabian T1 - Germany T2 - Routledge Handbook of Violent Extremism and Resilience KW - Rechtsradikalismus KW - Deutschland KW - Resilienz Y1 - 2023 SN - 9781003267102 U6 - https://doi.org/10.4324/9781003267102-13 SP - 168 EP - 180 PB - Routledge CY - London ET - 1 ER - TY - JOUR A1 - Titus, Juliane A1 - Kaluza, Stefan A1 - Marschall, Roland T1 - German Catalysis on an International Scale in Weimar JF - ChemCatChem Y1 - 2014 U6 - https://doi.org/10.1002/cctc.201402266 SN - 1867-3899 VL - 6 IS - 6 SP - 1523 EP - 1525 PB - Wiley ER - TY - JOUR A1 - Engel, Rebecca V. A1 - Kaluza, Stefan A1 - Oezaslan, Mehtap A1 - Peitz, Stephan T1 - German Catalysis Meeting - 50 Years and as Young as Ever JF - ChemCatChem Y1 - 2017 U6 - https://doi.org/10.1002/cctc.201700683 SN - 1867-3899 VL - 9 IS - 11 SP - 2018 EP - 2020 PB - Wiley ER - TY - CHAP A1 - Jendreiko, Christian ED - Arias, Joaquín ED - Azzolini, Damiano ED - Basu, Kinjal ED - Dahl, Veronica ED - Hecher, Markus ED - Pacenza, Francesco ED - Saribatur, Zeynep ED - Varanasi, Sarat C. T1 - Generative Logic: Teaching Prolog as Generative AI in Art and Design T2 - ICLP-WS 2024 ICLP Workshops 2024: Workshop Proceedings of the 40th International Conference on Logic Programming (ICLP-WS 2024) co-located with the 40th International Conference on Logic Programming (ICLP 2024) N2 - This paper introduces a method for teaching Prolog, especially to BA and MA students in art and design faculties. The method is called Exploring Generative Logic (EGL). The method is based on the concept of Generative Logic. Both methods are under development at the Faculty of Design, HSD, University of Applied Sciences, Düsseldorf. The basic idea of teaching Prolog with EGL is to present Prolog not as “another” programming language, but primarily as a logic AI. This perspective helps beginners gain a clear view of how Prolog works and focuses on understanding Prolog as a powerful generative AI, making it highly attractive in the domain of art and design. The author assumes that the EGL method can be easily adapted to other educational settings: education of non-programmers of all ages, including children in elementary or secondary schools, as well as students in other non-STEM curricula, to develop skills in logical thinking, digital literacy, AI literacy, and artistic literacy. The paper is divided into two parts: Part one provides an introduction to the basic ideas and objectives of the teaching method. Part two offers a description of the teaching method. KW - Generative Logic KW - Teaching Prolog KW - Logic Programming KW - Generative AI KW - Generative Design KW - Symbolic AI KW - Digital Literacy KW - AI Literacy Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46771 SN - 1613-0073 VL - 3799 SP - 1 EP - 11 PB - RWTH Aachen CY - Aachen ER - TY - THES A1 - Versümer, Siegbert T1 - Generalized prediction of quiet indoor soundscapes based on retrospective and in-situ judgements N2 - This dissertation aims to enhance the understanding of how people perceive and react to everyday sounds, particularly in their homes. The focus is laid on indoor soundscapes and the interplay between acoustic measures, individual differences, and contextual factors. A retrospective online study and a field study at peoples’ homes based on the Experience Sampling Method were the ecologically valid ground truth for four key publications. These address significant gaps in soundscape research by providing insights into the factors influencing sound perception in real-life contexts, the evaluation of low-level (i.e., quiet) sounds, and the consequences of (in)appropriate statistical analysis of imbalanced hierarchical soundscape data. The studies reveal that the sound source category is a critical predictor of annoyance and the pleasantness of soundscapes, with different types of sounds (e.g., natural, human, technical) having distinct impacts. Contrary, the effect of acoustic measures like perceived and calculated loudness on sound perception was expected to be high but was masked by contextual factors. These were the perceived control over the acoustic situation and the affective state of a person in the specific situation, proving context-related perceptual measures to be more important than the sound itself. The research consequently highlights the need for automatic sound source identification in complex polyphony everyday sound environments and suggests that individual preferences and liking of sounds could be potential factors in predicting individual sound perception. The dissertation also emphasizes the importance of using appropriate statistical methods, including mixed-effects models and nonlinear regression techniques, to generate more generalizable and more valid results based on hierarchical and imbalanced soundscape data. The findings underscore the limitations of traditional acoustic metrics and advocate for the use of time-series data to better capture the dynamic nature of everyday sound environments in contrast to stimuli typically used in laboratory studies. The author further developed a multi-objective function for avoiding both over- and underfitting during hyperparameter tuning, significantly improving generalized model fitting in soundscape research. Overall, this work contributes to the field of soundscape research by providing a comprehensive analysis of sound perception in indoor environments, highlighting the importance of context, individual differences, and advanced statistical methods in understanding and modeling soundscapes. Finally, future perspectives were discussed, such as the focus on individual preferences, experiences, and expectations for the improved prediction of individual sound perception. N2 - Diese Dissertation verbessert das Verständnis dafür, wie Menschen alltägliche Geräusche wahrnehmen. Der Schwerpunkt liegt dabei auf der Geräuschkulisse in Innenräumen und dem Zusammenspiel von (psycho-)akustischen Messgrößen, individuellen Unterschieden und kontextuellen Faktoren. Eine retrospektive Online-Studie und eine Feldstudie in Wohnräumen der Probanden bildeten die ökologisch valide Grundlage der vier Schlüsselpublikationen. Diese untersuchen Faktoren, die die Geräuschwahrnehmung in realen Kontexten beeinflussen, indem sie die Bewertung von Geräuschen und die Folgen einer (un-)angemessenen statistischen Analyse von unausgewogenen hierarchischen Soundscape-Daten betrachten. Die Studien zeigen, dass die Kategorie der Geräuschquelle ein entscheidender Prädiktor für die Belästigung und die Angenehmheit ist. Entgegen der Erwartung, dass akustische Messgrößen wie die wahrgenommene und berechnete Lautheit einen großen Einfluss auf die Geräuschwahrnehmung haben, zeigte sich jedoch, dass diese durch kontextbezogene Faktoren maskiert wurde. Dabei handelte es sich um die empfundene Kontrolle über die akustische Situation und den emotionalen Zustand einer Person in der spezifischen Situation, wobei sich kontextbezogene Wahrnehmungsmaße als wichtiger erwiesen als das Umgebungsgeräusch selbst. Die Untersuchung unterstreicht folglich die Notwendigkeit einer automatischen Identifizierung von Geräuschquellen in komplexen polyphonen alltäglichen Geräuschumgebungen und legt nahe, dass individuelle Vorlieben für bestimmte Klänge wichtige Faktoren bei der Vorhersage der individuellen Geräuschwahrnehmung sein könnten. Die Dissertation unterstreicht zusätzlich die Bedeutung der Verwendung geeigneter statistischer Methoden, einschließlich Modellen mit gemischten Effekten und nichtlinearen Regressionstechniken, um verallgemeinerungsfähigere Ergebnisse auf der Grundlage hierarchischer und unausgewogener Daten von Soundscape-Studien zu erzielen. Die Ergebnisse zeigen zudem die Grenzen akustischer und psychoakustischer Metriken auf und implizieren die Verwendung von Zeitreihendaten, um die dynamische Natur alltäglicher Geräuschumgebungen besser zu repräsentieren. Darüber hinaus entwickelte der Autor eine Mehrzieloptimierung zur Vermeidung von Über- und Unteranpassung beim Hyperparametertuning, wodurch die Anpassung verallgemeinerbarer Modelle erheblich verbessert wird. Insgesamt leistet diese Arbeit einen wesentlichen Beitrag, indem sie eine umfassende Analyse der Geräuschwahrnehmung in Innenräumen liefert und die Bedeutung von Kontext, individuellen Unterschieden und angemessenen statistischen Methoden für das Verständnis und die Modellierung von Soundscapes hervorhebt. Abschließend werden mögliche Zukunftsperspektiven erörtert, wie z. B. der Fokus auf individuelle Präferenzen, Erfahrungen und Erwartungen für eine verbesserte Vorhersage der individuellen Geräuschwahrnehmung. KW - Psychoakustik KW - Lautwahrnehmung KW - Lautstärke KW - Belästigung Y1 - 2025 U6 - https://doi.org/10.14279/depositonce-23962 PB - Berlin CY - Technische Universität Berlin ER - TY - JOUR A1 - Eckhardt, Jennifer A1 - Kaletka, Christoph A1 - Pelka, Bastian A1 - Unterfrauner, Elisabeth A1 - Voigt, Christian A1 - Zirngiebl, Marthe T1 - Gender in the making: An empirical approach to understand gender relations in the maker movement JF - International Journal of Human-Computer Studies Y1 - 2021 U6 - https://doi.org/10.1016/j.ijhcs.2020.102548 SN - 1095-9300 VL - 145 IS - 102548 PB - Elsevier ER - TY - JOUR A1 - Möllmann, Anne A1 - Hunger, Antje A1 - Schulz, Claudia A1 - Wilhelm, Sabine A1 - Buhlmann, Ulrike T1 - Gazing rituals in body dysmorphic disorder JF - Journal of behavior therapy and experimental psychiatry KW - FBSK_Webseite Y1 - 2020 U6 - https://doi.org/10.1016/j.jbtep.2019.101522 VL - 68 PB - Elsevier ER - TY - JOUR A1 - Möllmann, Anne A1 - Hunger, Antje A1 - Dusend, Christina A1 - van den Hout, Marcel A1 - Buhlmann, Ulrike T1 - Gazing at facial features increases dissociation and decreases attractiveness ratings in non-clinical females - A potential explanation for a common ritual in body dysmorphic disorder JF - PloS one N2 - Rituals, such as gazing at faces, are common in body dysmorphic disorder (BDD) and appear in cognitive-behavioral models as a maintaining factor. Rituals are also common in obsessive-compulsive disorder (OCD). In contrast to OCD, the proposed associations between rituals and intrusive thoughts/appearance preoccupation have not been empirically investigated for BDD. We examined if the assumed effect of gazing rituals on attractiveness ratings exists and if it is associated with dissociation. In an experiment, we asked N = 65 non-clinical females to focus on the nose of a photographed face at pre- and post-test. In between, participants gazed at the nose of either the same (relevant gazing) or another face (irrelevant gazing). We found increasing dissociation after gazing in both conditions and a differentially stronger decrease of attractiveness ratings in the relevant gazing condition. Our findings support the hypothesized effect of gazing rituals on attractiveness evaluation in cognitive-behavioral models for BDD. Y1 - 2019 U6 - https://doi.org/10.1371/journal.pone.0219791 VL - 14 IS - 7 PB - PLoS ER - TY - CHAP A1 - Treskunov, Anastasia A1 - Vogel, Christoph A1 - Wróblewska, Marta A1 - Bertram, Michael A1 - Büntig, Fabian A1 - Geiger, Christian ED - Chisik, Yoram ED - Holopainen, Jussi ED - Khaled, Rilla ED - Luis Silva, José ED - Alexandra Silva, Paula T1 - G:RASS – Experiencing a City Through an Artist’s Eyes T2 - Intelligent Technologies for Interactive Entertainment: INTETAIN 2017, Funchal, Portugal, June 20-22, 2017, Proceedings Y1 - 2018 UR - https://doi.org/10.1007/978-3-319-73062-2_12 SN - 978-3-319-73061-5 U6 - https://doi.org/10.1007/978-3-319-73062-2_12 SP - 142 EP - 145 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Gaida, Daniel A1 - Stuhlsatz, André A1 - Meier, Hans-Günter ED - Wendemuth, Andreas ED - Meier, Hans-Günter T1 - Fusion of Visual and Inertial Measurements for Pose Estimation T2 - Proceedings of the Workshop on Emotion-, Speech- and Face Recognition with Advanced Classifiers: Düsseldorf, Germany, May 16 - 17, 2008 ; 3rd joined research workshop between Otto-von-Guericke University Magdeburg and the University of Applied Sciences FH Düsseldorf Y1 - 2008 SN - 9783940961242 SP - 39 EP - 48 PB - Otto-von-Guericke University Magdeburg CY - Magdeburg ER - TY - CHAP A1 - Triebus, Charlotte A1 - Harth, Jonathan A1 - Druzetic-Vogel, Ivana A1 - Geiger, Christian ED - De Paolis, Lucio Tommaso ED - Arpaia, Pasquale ED - Sacco, Marco T1 - From Tool to Space: Towards Classifying New Media Art T2 - Extended Reality: International Conference, XR Salento 2025, Otranto, Italy, June 17–20, 2025, Proceedings, Part V KW - Medienkunst KW - Erweiterte Realität (Informatik) KW - Klassifikation KW - Taxonomie Y1 - 2025 SN - 9783031977749 U6 - https://doi.org/10.1007/978-3-031-97775-6_10 SN - 0302-9743 VL - Lecture Notes in Computer Science, Bd.15741 SP - 171 EP - 191 PB - Springer Nature Switzerland CY - Cham ER - TY - JOUR A1 - Voss, Karsten A1 - Musall, Eike A1 - Lichtmeß, Markus T1 - From Low Energy to Net Zero-Energy Buildings: Status and Perspectives JF - Journal of Green Building N2 - “Net Zero-Energy Building” has become a popular catchphrase to describe the synergy between energy-efficient building and renewable energy utilisation to achieve a balanced energy budget over an annual cycle. Taking into account the energy exchange with a grid overcomes the limitations of energy-autonomous buildings with the need for seasonal energy storage on-site. Although the expression, “Net Zero-Energy Building,” appears in many energy policy documents, a harmonised definition or a standardised balancing method is still lacking. This paper reports on the background and the various effects influencing the energy balance approach. After discussing the national energy code framework in Germany, a harmonised terminology and balancing procedure is proposed. The procedure takes not only the energy balance but also energy efficiency and load matching into account. KW - Eigene Methodik Y1 - 2011 U6 - https://doi.org/10.3992/jgb.6.1.46 VL - 6 IS - 1 SP - 46 EP - 57 PB - College Publishing ER - TY - CHAP A1 - Thielen, Sven A1 - Salgert, Björn A1 - Franz, Thomas T1 - From Lab to Market: Architectural Evolution in Open Source Transition T2 - Software Architecture, 19th European Conference, ECSA 2025, Limassol, Cyprus, September 15–19, 2025, Proceedings KW - Open Source KW - Architectural Erosion KW - Open Source Software KW - Hybrid Governance KW - Real-Time Systems KW - Software Archipelago KW - Cathedral-Bazaar Model Y1 - 2025 SN - 9783032021373 U6 - https://doi.org/10.1007/978-3-032-02138-0_20 SN - 0302-9743 VL - LNCS 15929 SP - 306 EP - 322 PB - Springer Nature CY - Cham ER - TY - RPRT A1 - van Rießen, Anne A1 - van den Brink, Henning T1 - From impacts to benefits: User research as a change of perspective for studies on the practice of drama education N2 - This essay looks at the potentials and limitations of user research for studies on the practice of drama education. To date, this field has been dominated by impact studies. After illustrating the blind spots that are created by taking this research approach to the practice of drama education, we will present the user research perspective and look at the opportunities that it provides to generate new, differentiated knowledge. User research makes it possible to illuminate the processes of acquiring and using knowledge in terms of its delivery. It also provides a potential framework of analysis for placing these processes in the delivery context, which includes subjective learning types, relevance and institutional and social conditions. This expanded perspective will make it possible to identify the factors that foster and limit benefits and reflect them in practice. N2 - In diesem Beitrag stehen die Potenziale und Grenzen der Nutzerforschung für die Erforschung theaterpädagogischer Praxis im Zentrum. Dabei wird unter Rückgriff auf die Wirkungsforschung, die bisher dieses Forschungsfeld dominiert, zunächst deutlich gemacht, welche „Blindstellen“ diese Forschungsperspektive für die theaterpädagogische Praxis birgt. Anschließend wird die Perspektive der Nutzerforschung dargestellt, um davon ausgehend der Frage nachzugehen, welche Option diese bietet, neues und differenziertes Wissen über die theaterpädagogische Praxis zu generieren. So könnte es unseres Erachtens mit Hilfe der Nutzerforschung möglich werden, die Aneignungs- und Nutzungsprozesse im Erbringungsverhältnis besser auszuleuchten, ins Verhältnis zum Erbringungskontext zu setzen und nutzenfördernde und -limitierende Faktoren zu identifizieren. T2 - Von der Wirkung zum Nutzen: Die Nutzerforschung als Perspektivwechsel bei der Erforschung theaterpädagogischer Praxis T3 - Studies in Social Sciences and Culture. Aus der Forschung des Fachbereichs Sozial- und Kulturwissenschaften der HSD - 6 KW - sozialpädagogische Nutzer*innenforschung KW - Wirkungsforschung KW - social pedagogical user research KW - drama education KW - Theaterpädagogik KW - impact studies Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-21273 SN - 2509-6958 CY - Düsseldorf ER - TY - JOUR A1 - Irrgang, Melanie A1 - Steffens, Jochen A1 - Egermann, Hauke T1 - From acceleration to rhythmicity: Smartphone-assessed movement predicts properties of music JF - Journal of New Music Research KW - Accelerometer KW - Embodied Music Cognition KW - Mobile Devices KW - Movement and Computing KW - Music Information Retrieval Y1 - 2020 U6 - https://doi.org/10.1080/09298215.2020.1715447 VL - 4 IS - 7 SP - 1 EP - 14 PB - Taylor & Francis ER - TY - GEN A1 - de Bánffy-Hall, Alicia T1 - Fresh Eyes on Music: lessons for community music and music education T2 - Sounding Board Y1 - 2013 SN - 1464-6730 ER - TY - CHAP A1 - Gräßle, Kathrin A1 - Müller, Regine ED - Thole, Werner ED - Höblich, Davina ED - Ahmed, Sarina T1 - Freie Träger [Im Erscheinen] T2 - Taschenwörterbuch Soziale Arbeit KW - im Erscheinen Y1 - 2026 PB - Julius Klinkhardt CY - Bad Heilbrunn ET - 3. überarbeitete Auflage ER - TY - CHAP A1 - Herder, Jens A1 - Daemen, Jeff A1 - Haufs-Brusberg, Peter A1 - Abdel Aziz, Isis ED - Brunnett, Guido ED - Coquillart, Sabine ED - van Liere, Robert ED - Welch, Gregory ED - Váša, Libor T1 - Four Metamorphosis States in a Distributed Virtual (TV) Studio: Human, Cyborg, Avatar, and Bot - Markerless Tracking and Feedback for Realtime Animation Control T2 - Virtual Realities: International Dagstuhl Seminar, Dagstuhl Castle, Germany, June 9-14, 2013, Revised Selected Papers KW - Markeless tracking KW - virtual studio KW - Avatars KW - virtual characters KW - Interaction feedback KW - VSVR KW - Virtual (TV) Studio Y1 - 2015 UR - https://link.springer.com/chapter/10.1007/978-3-319-17043-5_2 SN - 978-3-319-17042-8 U6 - https://doi.org/10.1007/978-3-319-17043-5_2 VL - LNCS, 8844 SP - 16 EP - 32 PB - Springer CY - Cham ER - TY - CHAP A1 - Burga, Jose A1 - Daemen, Jeff A1 - Djuderija, Sascha A1 - Gnehr, Maren A1 - Goossens, Lars A1 - Hartz, Sven A1 - Haufs-Brusberg, Peter A1 - Herder, Jens A1 - Ibrahim, Mohammed A1 - Koop, Nikolas A1 - Leske, Christophe A1 - Meyer, Laurid A1 - Müller, Antje A1 - Salgert, Björn A1 - Schroeder, Richard A1 - Thiele, Simon T1 - Four Metamorphosis States in a Distributed Virtual (TV) Studio: Human, Cyborg, Avatar, and Bot T2 - 10th International Conference on Visual Media Production (CVMP 2013), London N2 - The major challenge in virtual studio technology is the interaction between the actor and virtual objects. Within a distributed live production, two locally separated markerless tracking systems where used simultaneously alongside a virtual studio. The production was based on a fully tracked actor, cyborg (half actor, half graphics), avatar, and a bot. All participants could interact and throw a virtual disc. This setup is compared and mapped to Milgram’s continuum and technical challenges are described. KW - TV KW - Distributed Virtual KW - Studio KW - Human KW - Cyborg KW - Avatar KW - Bot KW - VSVR Y1 - 2013 CY - London ER - TY - CHAP A1 - Häusler, Alexander ED - Fischer, Jörg ED - Dunn, Kerry T1 - Forms of Right-Wing Populism: The Example Alternative for Germany (AfD) T2 - Stifled Progress – International Perspectives on Social Work and Social Policy in the Era of Right-Wing Populism KW - Forena Y1 - 2019 SN - 9783847413233 U6 - https://doi.org/10.2307/j.ctvfrxr60.4 SP - 17 EP - 32 PB - Verlag Barbara Budrich CY - Opladen ER - TY - JOUR A1 - Huber, Florian A1 - Strehle, Dan A1 - Schnauß, Jörg A1 - Käs, Josef T1 - Formation of regularly spaced networks as a general feature of actin bundle condensation by entropic forces JF - New Journal of Physics KW - DOAJ Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34833 SN - 1367-2630 VL - 17 IS - 4 PB - IOP Publishing ER - TY - JOUR A1 - Emanuelsson, E. U. A1 - Hallquist, M. A1 - Kristensen, K. A1 - Glasius, M. A1 - Bohn, Birger A1 - Fuchs, H. A1 - Kammer, B. A1 - Kiendler-Scharr, A. A1 - Nehr, Sascha A1 - Rubach, F. A1 - Tillmann, R. A1 - Wahner, A. A1 - Wu, H.-C. A1 - Mentel, Th. F. T1 - Formation of anthropogenic secondary organic aerosol (SOA) and its influence on biogenic SOA properties JF - Atmospheric Chemistry and Physics N2 - Abstract. Secondary organic aerosol (SOA) formation from mixed anthropogenic and biogenic precursors has been studied exposing reaction mixtures to natural sunlight in the SAPHIR chamber in Jülich, Germany. In this study aromatic compounds served as examples of anthropogenic volatile organic compound (VOC) and a mixture of α-pinene and limonene as an example for biogenic VOC. Several experiments with exclusively aromatic precursors were performed to establish a relationship between yield and organic aerosol mass loading for the atmospheric relevant range of aerosol loads of 0.01 to 10 μg m−3. The yields (0.5 to 9%) were comparable to previous data and further used for the detailed evaluation of the mixed biogenic and anthropogenic experiments. For the mixed experiments a number of different oxidation schemes were addressed. The reactivity, the sequence of addition, and the amount of the precursors influenced the SOA properties. Monoterpene oxidation products, including carboxylic acids and dimer esters were identified in the aged aerosol at levels comparable to ambient air. OH radicals were measured by Laser Induced Fluorescence, which allowed for establishing relations of aerosol properties and composition to the experimental OH dose. Furthermore, the OH measurements in combination with the derived yields for aromatic SOA enabled application of a simplified model to calculate the chemical turnover of the aromatic precursor and corresponding anthropogenic contribution to the mixed aerosol. The estimated anthropogenic contributions were ranging from small (≈8%) up to significant fraction (50%) providing a suitable range to study the effect of aerosol composition on the aerosol volatility (volume fraction remaining (VFR) at 343 K: 0.86–0.94). The aromatic aerosol had higher oxygen to carbon ratio O/C and was less volatile than the biogenic fraction. However, in order to produce significant amount of aromatic SOA the reaction mixtures needed a higher OH dose that also increased O/C and provided a less volatile aerosol. The SOA yields, O/C, and f44 (the mass fraction of CO2+ ions in the mass spectra which can be considered as a measure of carboxylic groups) in the mixed photo-chemical experiments could be described as linear combinations of the corresponding properties of the pure systems. For VFR there was in addition an enhancement effect, making the mixed aerosol significantly less volatile than what could be predicted from the pure systems. A strong positive correlation was found between changes in volatility and O/C with the exception during dark hours where the SOA volatility decreased while O/C did not change significantly. Thus, this change in volatility under dark conditions as well as the anthropogenic enhancement is due to chemical or morphological changes not affecting O/C. KW - Luftreinhaltung Y1 - 2013 U6 - https://doi.org/10.5194/acp-13-2837-2013 SN - 1680-7324 VL - 13 IS - 5 SP - 2837 EP - 2855 PB - Copernicus ER - TY - RPRT A1 - Deckert, Carsten A1 - Keszler, Julia A1 - Schmitz, Helen A1 - Mohya, Ahmed T1 - Forecasting Game: Teaching Prospective Engineers Quantitative Forecasting Techniques with a Simulation Game N2 - In order to determine demand as precisely as possible, many businesses use several forecasting methods. The aim of forecasting is to determine future demand based on data from the past. The use of a specific method is not always easy and depends on a number of factors. To help prospective engineers find the most suitable forecasting method for a specific problem, a forecasting game was developed and then evaluated. The paper describes the design and the evaluation of the forecasting game. In order to provide an overview of existing forecasting methods, the first part of the paper examined the mathematical fundamentals of eight different forecasting methods and outlined the requirements for their application. The second part of the paper describes the creation of a forecasting game in which prospective engineers can learn how to determine the appropriate forecasting method for specific scenarios. In total, five scenarios covering the three different demand patterns (linear/stationary, trend and seasonal) as well as the forecast quality methods were developed and can be played through. For each scenario, the player has to choose the most appropriate forecasting method for a specific problem based on a self-created task description. To make the game as realistic as possible, a fictional company with a background story was designed. The last part was about the evaluation of the forecasting game. For the evaluation, a student survey to gather the opinions of the students was conducted. The results of the student survey show an overall positive evaluation of the simulation game by the students. However, the test also showed that the game takes a certain amount of time. Since only 15 of the approximately 30 students who tested the game participated in the evaluation, the results are not significant. T3 - Working Papers in Industrial Engineering - 5 Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-39057 SN - 2627-8375 CY - Düsseldorf ER - TY - CHAP A1 - Schröder, Joachim ED - Borggräfe, Henning ED - Jah, Akim T1 - Forced Accommodation for Jews in the Context of the Deportations at the Düsseldorf Abattoir (1939–1944) T2 - Deportations in the Nazi Era. Sources and Research N2 - During the period 1941 to 1944, the former Düsseldorf abattoir served as an assembly camp for almost 6,000 Jewish men, women and children from the administrative district of Düsseldorf prior to their deportation. Their deportation was the end of a long process of disenfranchisement and social isolation, the penultimate stage of which was eviction from their own or rented housing and confinement in forced accommodation: a ‘Judenhaus’ (‘Jews house’, a tenement building where Jews were housed), communal accommodation or a camp. This paper investigates for the first time the background to and the process of ‘residential segregation’ in this region. It names the various actors of local municipal authorities and the NSDAP involved and uses examples to describe the situation faced by those who were persecuted. KW - Segregation (Soziologie) KW - Deportation KW - Nationalsozialismus KW - Regierungsbezirk Düsseldorf KW - Judenverfolgung Y1 - 2023 SN - 9783110746464 U6 - https://doi.org/10.1515/9783110746464-014 VL - 2 SP - 229 EP - 248 PB - De Gruyter ER - TY - CHAP A1 - Krieter, Philipp A1 - Zerrer, Patrick A1 - Puschmann, Cornelius A1 - Geise, Stephanie ED - Boratto, Ludovico ED - Gena, Cristina ED - Marras, Mirko ED - Germanakos, Panagiotis ED - Popescus, Elvira T1 - Following Topics Across All Apps and Media Formats: Mobile Keyword Tracking as a Privacy-Friendly Data Source in Mobile Media Research T2 - UMAP Adjunct '24: Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization, Cagliari Italy, July 1 - 4, 2024 Y1 - 2024 SN - 979-8-4007-0466-6 U6 - https://doi.org/10.1145/3631700.3664879 SP - 126 EP - 131 PB - ACM CY - New York ER - TY - JOUR A1 - Rückert, Frank Ulrich A1 - Ibrar, Burhan A1 - Ahmed, Arslan A1 - Allweyer, Benjamin A1 - Hübner, Dirk A1 - Klinger, Friedrich A1 - Knaus, Hermann A1 - Benim, Ali Cemal T1 - Fluid flow and heat transfer of a novel passive cooling system for gearless wind turbines with a power range of 3–12 MW JF - Energy N2 - Today, the gearless horizontal axis wind turbines are mainstream in wind energy industry. High demands of electric power led to bigger systems and active cooling reduces the overall efficiency of the turbines. Passive cooling systems have been examined for the first time for a gearless wind energy generator with power range of 3–12 MW. With further developed heat conductors, it is possible to operate a wind generator in a larger power class with passive cooling components. This is accompanied by enormous cost savings due to elimination of costs for active cooling elements such as the use of fans, pumps, and heat exchangers. An additional factor is the significant reduction in necessary maintenance due to the minimized incidence of corrosion and wear. Design of the cooling fins and an ideal position of the generator within the housing of the wind turbine has been objectives. Mandatory is that maximum temperatures of the generator fins should stay under 155 °C, which could be reached with several designs for different heat exchanger geometries. KW - Windturbine KW - Wärmeübertragung KW - Numerische Strömungssimulation KW - Generator KW - Kühlung KW - Passive cooling KW - Gearless wind turbine Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46594 SN - 0360-5442 VL - 312 PB - Elsevier ER - TY - JOUR A1 - Weber, Stephan A1 - Kuttler, Wilhelm A1 - Weber, Konradin T1 - Flow characteristics and particle mass and number concentration variability within a busy urban street canyon JF - Atmospheric Environment KW - Luftreinhaltung Y1 - 2006 U6 - https://doi.org/10.1016/j.atmosenv.2006.07.002 VL - 40 IS - 39 SP - 7565 EP - 7578 PB - Elsevier ER - TY - JOUR A1 - Marcinkowski, Frank A1 - de Haas, Hella A1 - Kohler, Sarah T1 - Flight or fight? - How the coronavirus pandemic has affected scientists’ willingness to engage with the public JF - Humanities and Social Sciences Communications N2 - During the coronavirus pandemic, scientists who worked to overcome the outbreak received recognition, but also opposition and even hostility. This article examines how the experience of the pandemic has affected the willingness of scientists to engage with the public. Derived from a comprehensive survey of 4207 scientists at German universities and research institutions, animosity towards scientists during the pandemic has created a sense of insecurity that may cause them to withdraw from the public eye. Depending on the relative strength of two cognitive appraisals, the severity of the threat and the appropriateness of the retreat option, the likelihood of respondents engaging with the public varies significantly. KW - COVID-19-Pandemie KW - Wissenschaftskommunikation KW - Bedrohung KW - Wahrnehmung KW - Öffentlichkeit Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60444 SN - 2662-9992 VL - 12 PB - Springer Nature ER - TY - CHAP A1 - Wöldecke, Björn A1 - Marinos, Dionysios A1 - Geiger, Christian ED - Gehring, Sven ED - Boring, Sebastian ED - Quigley, Aaron T1 - Flexible Registration of Multiple Displays T2 - Proceedings of The International Symposium on Pervasive Displays, Copenhagen, 03.06.2014-04.06.2014 Y1 - 2014 UR - https://dl.acm.org/doi/proceedings/10.1145/2611009 SN - 9781450329521 U6 - https://doi.org/10.1145/2611009.2611030 SP - 86 EP - 91 PB - ACM CY - New York ER - TY - CHAP A1 - Rosenthal, Fabian A1 - Blättermann, Patrick A1 - Versümer, Siegbert T1 - flexcv: Python package for fitting, comparing, and logging multiple machine learning models using various cross-validation methods [Poster] T2 - Fortschritte der Akustik - DAGA 2024, 18. - 21. März 2024, Hannover N2 - The evaluation of listening experiments and studies on acoustics not only requires basic knowledge of statistics, but also poses challenges in the implementation of different methodologies. Especially for small sample sizes and peculiarities regarding hierarchical data structures, the need to individualize evaluation scripts arises. Therefore, we introduce flexcv, a powerful machine learning package for Python for evaluating various models on experimental tabular data, especially with small sample sizes. It supports random effects evaluation (including random slopes) for both linear and non-linear regressors, providing broad applicability to different experiments and research questions.flexcv quickly allows to perform nested cross-validation on a variety of models for comparison with each other. On the one hand, the implementation of a flexible interface simplifies the exchange of methods in the script, allowing researchers to change cross-validation methods without having to touch the actual cross-validation code. On the other hand, extensive online logging allows and simplifies the evaluation and experiment tracking along the process and different machines. Y1 - 2024 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - GEN A1 - Rosenthal, Fabian A1 - Versümer, Siegbert A1 - Blättermann, Patrick T1 - flexcv: Easy and flexible nested cross validation for tabular data in python N2 - Python package customizing nested cross validation for tabular data. KW - Software KW - Python (Programmiersprache) Y1 - 2024 U6 - https://doi.org/10.5281/zenodo.10160846 PB - Zenodo CY - Genf ET - Version v24.0-beta ER - TY - CHAP A1 - Weber, Konradin A1 - Fischer, Christian A1 - Vogel, Andreas A1 - Pohl, Tobias A1 - Böhlke, Christoph A1 - Lau, Hendrik A1 - Eliasson, Jonas A1 - Palsson, Thorgeir ED - Mladenov, Valeri ED - Tasho, Tashev ED - Hui, Wang ED - Ivan, Kralov ED - Sergey, Stankevich ED - Pelin, Yildiz ED - Jon, Burley T1 - First results of an airborne release of volcanic ash for testing of volcanic ash plume measurement instruments T2 - Recent Advances in Energy and Environmental Management KW - Luftreinhaltung KW - Vulkanasche KW - Messtechnik KW - Forschungsflugzeug Y1 - 2013 VL - Energy, Environmental and Structural Engineering Series 13 SP - 169 EP - 172 PB - WSEAS ER - TY - JOUR A1 - Benim, Ali Cemal T1 - Finite element solution of an enclosed turbulent diffusion flame JF - International Journal for Numerical Methods in Fluids N2 - A finite element formulation of enclosed turbulent diffusion flames is presented. A primitive variables approach is preferred in the analysis. A mixed interpolation is employed for the velocity and pressure. In the solution of the Navier‐Stokes equations, a segregated formulation is adopted, where the pressure discretization equation is obtained directly from the discretized continuity equation, considering the velocity‐pressure relationships in the discretized momentum equations. The state of turbulence is defined by a κ–ϵ model. Near solid boundaries, a wall function approach is employed. The combustion rates are estimated using the eddy dissipation concept. The expensive direct treatment of the integrodifferential equations of radiation is avoided by employing the moment method, which allows the derivation of an approximate local field equation for the radiation intensity. The proposed finite element model is verified by investigating a technical turbulent diffusion flame of semi‐industrial size, and comparing the results with experiments and finite difference predictions. KW - Finite-Elemente-Methode KW - Turbulente Diffusionsflamme KW - Navier-Stokes-Gleichung KW - Numerische Strömungssimulation Y1 - 1989 U6 - https://doi.org/10.1002/fld.1650090305 SN - 0271-2091 VL - 9 IS - 3 SP - 289 EP - 303 PB - Wiley ER - TY - JOUR A1 - Benim, Ali Cemal T1 - Finite element analysis of confined turbulent swirling flows JF - International Journal for Numerical Methods in Fluids N2 - The finite element method is applied to incompressible and statistically steady confined turbulent swirling flows. A velocity–pressure formulation is employed. The momentum and continuity equations are solved using a segregated algorithm. Two turbulence models, namely the standard κ–ε model and the algebraic stress model, are considered. It is shown that the algebraic stress model leads to significantly more accurate results in swirling flows compared to the κ–ε model. A novel way of implementing the algebraic stress model is presented in which the stresses are coupled to the Navier–Stokes equations in such a way that they ‘correct’ the effective viscosity hypothesis. This formulation seems to provide a convenient approach for finite elements. In deriving the discretization equations, a streamline‐upwind/Petrov–Galerkin method is employed. Comparisons performed between various upwind schemes show that the numerical solution may be substantially affected by the particular upwind procedure used. The analysis is extended to the prediction of particle motion in turbulent swirling flow fields. Here the fluid turbulence is modelled adopting a stochastic approach. The influence of turbulence modelling on particle movement is investigated. KW - Finite-Elemente-Methode KW - Turbulente Strömung KW - Navier-Stokes-Gleichung KW - Numerische Strömungssimulation Y1 - 1990 U6 - https://doi.org/10.1002/fld.1650110602 SN - 0271-2091 VL - 11 IS - 6 SP - 697 EP - 717 PB - Wiley ER - TY - CHAP A1 - Willers, Oliver A1 - Curcic, Michael A1 - Bosch, Robert ED - Thomas, Otto T1 - Fingerprinting MEMS Gyroscopes T2 - 11th Smart Systems Integration Conference 2017 International Conference and Exhibition on Integration Issues of Miniaturized Systems Cork, Ireland 8-9 March 2017 Y1 - 2017 SN - 978-1-5108-4478-0 PB - Curran Associates, Inc. ER - TY - JOUR A1 - Henin, Stefano A1 - Petit, Yannick A1 - Rohwetter, Philipp A1 - Stelmaszczyk, Kamil A1 - Hao, Zuoqiang A1 - Nakaema, Walter Morinobu A1 - Vogel, Andreas A1 - Pohl, Tobias A1 - Schneider, Friedhelm A1 - Kasparian, Jérôme A1 - Weber, Konradin A1 - Wöste, Ludger A1 - Wolf, Jean-Pierre T1 - Field measurements suggest the mechanism of laser-assisted water condensation JF - Nature Communications N2 - Because of the potential impact on agriculture and other key human activities, efforts have been dedicated to the local control of precipitation. The most common approach consists of dispersing small particles of dry ice, silver iodide, or other salts in the atmosphere. Here we show, using field experiments conducted under various atmospheric conditions, that laser filaments can induce water condensation and fast droplet growth up to several μm in diameter in the atmosphere as soon as the relative humidity exceeds 70%. We propose that this effect relies mainly on photochemical formation of p.p.m.-range concentrations of hygroscopic Hno3, allowing efficient binary Hno3–H2o condensation in the laser filaments. Thermodynamic, as well as kinetic, numerical modelling based on this scenario semiquantitatively reproduces the experimental results, suggesting that particle stabilization by Hno3 has a substantial role in the laser-induced condensation. KW - Luftreinhaltung KW - Kondensation KW - Laser KW - Niederschlag Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-52439 SN - 2041-1723 VL - 2 IS - 1 PB - Springer Nature ER - TY - CHAP A1 - Lutz, Katharina A1 - Boehnke, Mandy A1 - Huinink, Johannes A1 - Tophoven, Silke ED - Oláh, Livia Sz ED - Frątczak, Ewa T1 - Female employment, reconciliation policies, and childbearing intentions in East and West Germany. T2 - Childbearing, women's employment and work-life balance policies in contemporary Europe Y1 - 2013 SN - 1137318546 SP - 97 EP - 134 PB - Palgrave Macmillan CY - New York ER - TY - JOUR A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Feature extraction with deep neural networks by a generalized discriminant analysis JF - IEEE transactions on neural networks and learning systems N2 - We present an approach to feature extraction that is a generalization of the classical linear discriminant analysis (LDA) on the basis of deep neural networks (DNNs). As for LDA, discriminative features generated from independent Gaussian class conditionals are assumed. This modeling has the advantages that the intrinsic dimensionality of the feature space is bounded by the number of classes and that the optimal discriminant function is linear. Unfortunately, linear transformations are insufficient to extract optimal discriminative features from arbitrarily distributed raw measurements. The generalized discriminant analysis (GerDA) proposed in this paper uses nonlinear transformations that are learnt by DNNs in a semisupervised fashion. We show that the feature extraction based on our approach displays excellent performance on real-world recognition and detection tasks, such as handwritten digit recognition and face detection. In a series of experiments, we evaluate GerDA features with respect to dimensionality reduction, visualization, classification, and detection. Moreover, we show that GerDA DNNs can preprocess truly high-dimensional input data to low-dimensional representations that facilitate accurate predictions even if simple linear predictors or measures of similarity are used. Y1 - 2012 U6 - https://doi.org/10.1109/tnnls.2012.2183645 VL - 23 IS - 4 SP - 596 EP - 608 PB - IEEE ER - TY - CHAP A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Zielke, Thomas T1 - Feature Extraction for Simple Classification T2 - 2010 20th International Conference on Pattern Recognition, August 23 - 26, 2010 , Istanbul, Turkey Y1 - 2010 SN - 978-0-7695-4109-9 U6 - https://doi.org/10.1109/ICPR.2010.377 SN - 1051-4651 SP - 1525 EP - 1528 PB - IEEE ER -