TY - JOUR A1 - Biedermann, Till M. A1 - Czeckay, Pasquale A1 - Hintzen, Nils A1 - Kameier, Frank A1 - Paschereit, C. O. T1 - Applicability of Aeroacoustic Scaling Laws of Leading Edge Serrations for Rotating Applications JF - acoustics KW - DOAJ KW - ISAVE Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40311 SN - 2624-599X VL - 2 IS - 3 SP - 579 EP - 594 PB - MDPI ER - TY - CHAP A1 - Parreiras, Fernando Silva A1 - Saathoff, Carsten A1 - Walter, Tobias A1 - Franz, Thomas A1 - Staab, Steffen T1 - APIs a gogo: Automatic Generation of Ontology APIs’ T2 - ISWeb — Information Systems and Semantic Web, University of Koblenz-Landau Y1 - 2009 U6 - https://doi.org/10.1109/ICSC.2009.90 SP - 1 EP - 7 PB - University of Koblenz-Landau CY - Koblenz ER - TY - JOUR A1 - Hautmann, Christopher A1 - Hoijtink, Herbert A1 - Eichelberger, Ilka A1 - Görtz-Dorten, Anja A1 - Hanisch, Charlotte A1 - Plück, Julia A1 - Walter, Daniel A1 - Döpfner, Manfred T1 - Any indication for bias due to participation? Comparison of the effects of a parent management training rated by participating and non-participating parents JF - Clinical psychology & psychotherapy Y1 - 2013 U6 - https://doi.org/10.1002/cpp.1784 VL - 20 IS - 5 SP - 384 EP - 393 PB - Wiley ER - TY - JOUR A1 - Queval, Loic A1 - Gottkehaskamp, Raimund T1 - Analytical Field Calculation of Modulated Double Helical Coils JF - IEEE Transactions on Applied Superconductivity Y1 - 2015 U6 - https://doi.org/10.1109/tasc.2015.2477377 VL - 25 IS - 6 SP - 1 EP - 7 PB - IEEE ER - TY - JOUR A1 - Molloy, Dara A1 - Müller, Patrick A1 - Deegan, Brian A1 - Mullins, Darragh A1 - Horgan, Jonathan A1 - Ward, Enda A1 - Jones, Edward A1 - Braun, Alexander A1 - Glavin, Martin T1 - Analysis of the Impact of Lens Blur on Safety-Critical Automotive Object Detection JF - IEEE Access N2 - Camera-based object detection is widely used in safety-critical applications such as advanced driver assistance systems (ADAS) and autonomous vehicle research. Road infrastructure has been designed for human vision, so computer vision, with RGB cameras, is a vital source of semantic information from the environment. Sensors, such as LIDAR and RADAR, are also often utilized for these applications; however, cameras provide a higher spatial resolution and color information. The spatial frequency response (SFR), or sharpness of a camera, utilized in object detection systems must be sufficient to allow a detection algorithm to localize objects in the environment over its lifetime reliably. This study explores the relationship between object detection performance and SFR. Six state-of-the-art object detection models are evaluated with varying levels of lens defocus. A novel raw image dataset is created and utilized, containing pedestrians and cars over a range of distances up to 100-m from the sensor. Object detection performance for each defocused dataset is analyzed over a range of distances to determine the minimum SFR necessary in each case. Results show that the relationship between object detection performance and lens blur is much more complex than previous studies have found due to lens field curvature, chromatic aberration, and astigmatisms. We have found that smaller objects are disproportionately impacted by lens blur, and different object detection models have differing levels of robustness to lens blur KW - DOAJ KW - Object detection KW - intelligent transportation system KW - autonomous vehicles KW - ADAS KW - lens blur Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-42999 SN - 2169-3536 VL - 12 SP - 3554 EP - 3569 PB - IEEE ER - TY - JOUR A1 - Pfeiffelmann, Bjorn A1 - Ozman, Cansu A1 - Benim, Ali Cemal A1 - Joos, Franz T1 - Analysis of the effect of nonuniform surface temperature distribution on the performance of a thermoelectric generator JF - Sustainable Energy Technologies and Assessments Y1 - 2022 U6 - https://doi.org/10.1016/j.seta.2022.102375 SN - 2213-1388 VL - 53 IS - A PB - Elsevier ER - TY - CHAP A1 - von Berg, Markus A1 - Schwörer, Paul A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - Analysis of physical and perceptual properties of room impulse responses: development of an online tool T2 - Forum Acusticuum 2023: 10th Convention of European Acoustics Association, Turin, Italy, 11th-15th September 2023 N2 - Over the past decades, research in room acoustics has established several derivative measures of an impulse response, some of which are incorporated in the ISO 3382 standards. These parameters intend to represent perceptual qualities, but were developed without a consistent modeling of room acoustical perception. More recent research proposed comprehensive inventories of room acoustic perception that are purely based on evaluations by human subjects, such as the Room Acoustical Quality Index (RAQI). In this work RA-QI scores acquired for 70 room impulse responses were predicted from room acoustical parameters. Except for Reverberance, the prediction of RAQI factors performed rather poor. In most cases, the sound source had a greater impact on RAQI scores. All analyses are published in an online tool, where users can upload omnidirectional and binaural impulse responses, and instantly obtain and visualize several physical descriptors, as well as predicted RAQI scores for three different sound sources. So far, acceptable prediction accuracy is achieved for Reverberance, Strength, Irregular Decay, Clarity and Intimacy. Larger data sets of evaluated impulse responses are required to improve the model performance and enable reliable predictions of room acoustical quality. Therefore, the administration of RAQI evaluations within the website is currently being developed. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41955 PB - EAA ER - TY - RPRT A1 - Salom, Jaume A1 - Marszal, Anna Joanna A1 - Candanedo, Jose A1 - Widen, Joakim A1 - Byskov Lindberg, Karen A1 - Sartori, Igor T1 - Analysis of Load Match and Grid Interaction Indicators in Net Zero Energy Buildings with High-Resolution Data: A report of Subtask A IEA Task 40/Annex 52 Towards Net Zero Energy Solar Buildings KW - Bilanzierung KW - Energienetz KW - Mismatch Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?https://www.researchgate.net/publication/271135453_Analysis_of_load_match_and_grid_interaction_indicators_in_net_zero_energy_buildings_with_high-resolution_data PB - Catalonia Institute for Energy Research, IREC CY - Barcelona ER - TY - JOUR A1 - Pfeiffelmann, Björn A1 - Diederich, Michael A1 - Gül, Fethi A1 - Benim, Ali Cemal A1 - Hamberger, Andreas A1 - Heese, Markus T1 - Analysis of combustion, heat and fluid flow in a biomass furnace JF - E3S Web of Conferences KW - DOAJ Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-27880 SN - 2267-1242 VL - 128 PB - edp sciences ER - TY - CHAP A1 - Ille, Fabian A1 - Adam, Mario A1 - Gottschald, Jonas A1 - Wirth, Hans Peter T1 - Analysis of Ageing Phenomena for Big Solar Thermal Plants T2 - ECOS - 31th International Conference on Efficiency, Cost, Optimization, Simulation and Enviromental Impact of Energy Systems, 17.-21.06.2018, Guimaraes / Portugal KW - ST2000-LangEff Y1 - 2018 UR - https://www.researchgate.net/publication/326147054_Analysis_of_Ageing_Phenomena_for_Big_Solar_Thermal_Plants CY - Guimaraes ER - TY - CHAP A1 - Hatebur, Denis A1 - Heisel, Maritta A1 - Schmidt, Holger T1 - Analysis and Component-based Realization of Security Requirements T2 - 2008 Third International Conference on Availability, Reliability and Security N2 - We present a process to develop secure software with an extensive pattern-based security requirements engineering phase. It supports identifying and analyzing conflicts between different security requirements. In the design phase, we proceed by selecting security software components that achieve security requirements. The process enables software developers to systematically identify, analyze, and finally realize security requirements using security software components. We illustrate our approach by a lawyer agency software example. KW - security requirement KW - requirements engineering KW - data security KW - computer science Y1 - 2008 UR - https://ieeexplore.ieee.org/document/4529338 SN - 978-0-7695-3102-1 U6 - https://doi.org/10.1109/ARES.2008.27 N1 - Sie haben Zugriff auf den Volltext innerhalb des HSD Campus. SP - 195 EP - 203 PB - IEEE CY - Barcelona ER - TY - CHAP A1 - Hörner, Fernand ED - Dumnić Vilotijević, Marija ED - Medić, Ivana T1 - Analysing the voice in popular music with categories of ‚voice‘ T2 - Contemporary Popular Music Studies: Proceedings of the International Association for the Study of Popular Music 2017 Y1 - 2019 SN - 9783658252540 SP - 235 EP - 247 PB - Springer Fachmedien CY - Wiesbaden ER - TY - CHAP A1 - Jonker, Catholijn M. A1 - Aydoğan, Reyhan A1 - Baarslag, Tim A1 - Broekens, Joost A1 - Detweiler, Christian A. A1 - Hindriks, Koen V. A1 - Huldtgren, Alina A1 - Pasman, Wouter ED - Criado Pacheco, Natalia ED - Carrascosa, Carlos ED - Osman, Nardine ED - Julián Inglada, Vicente T1 - An Introduction to the Pocket Negotiator: A General Purpose Negotiation Support System T2 - Multi-Agent Systems and Agreement Technologies: 14th European Conference, EUMAS 2016, and 4th International Conference, AT 2016, Valencia, Spain, December 15-16, 2016 Y1 - 2017 SN - 978-3-319-59294-7 U6 - https://doi.org/10.1007/978-3-319-59294-7_2 VL - Lecture Notes in Computer Science (LNCS, volume 10207) SP - 13 EP - 27 PB - Springer CY - Cham ER - TY - JOUR A1 - Hötzel, K. A1 - von Brachel, R. A1 - Schmidt, U. A1 - Rieger, E. A1 - Kosfelder, Joachim A1 - Hechler, T. A1 - Schulte, D. A1 - Vocks, Silja T1 - An Internet-based program to enhance motivation to change in females with symptoms of an eating disorder: a randomized controlled trial JF - Psychological medicine Y1 - 2014 U6 - https://doi.org/10.1017/s0033291713002481 VL - 44 IS - 9 SP - 1947 EP - 1963 PB - Cambridge University Press ER - TY - CHAP A1 - Beckers, Kristian A1 - Faßbender, Stephan A1 - Schmidt, Holger T1 - An Integrated Method for Pattern-Based Elicitation of Legal Requirements Applied to a Cloud Computing Example T2 - 2012 Seventh International Conference on Availability, Reliability and Security N2 - Considering legal aspects during software development is a challenging problem, due to the cross-disciplinary expertise required. The problem is even more complex for cloud computing systems, because of the international distribution, huge amounts of processed data, and a large number of stakeholders that own or process the data. Approaches exist to deal with parts of the problem, but they are isolated from each other. We present an integrated method for elicitation of legal requirements. A cloud computing online banking scenario illustrates the application of our methods. The running example deals with the problem of storing personal information in the cloud and based upon the BDSG (German Federal Data Protection Act). We describe the structure of the online banking cloud system using an existing pattern-based approach. The elicited information is further refined and processed into functional requirements for software development. Moreover, our method covers the analysis of security-relevant concepts such as assets and attackers particularly with regard to laws. The requirements artifacts then serve as inputs for existing patterns for the identification of laws relevant for the online banking cloud system. Finally, our method helps to systematically derive functional as well as security requirements that realize the previously identified laws. KW - law KW - security KW - requirements engineering KW - software architecture Y1 - 2012 UR - https://ieeexplore.ieee.org/document/6329218 SN - 978-0-7695-4775-6 U6 - https://doi.org/10.1109/ARES.2012.25 N1 - Sie haben Zugriff auf den Volltext innerhalb des HSD Campus. SP - 463 EP - 472 PB - IEEE CY - Prague ER - TY - CHAP A1 - Nunn, Christian A1 - Kummert, Anton A1 - Müller, Dennis A1 - Meuter, Mirko A1 - Müller-Schneiders, Stefan T1 - An improved adaboost learning scheme using LDA features for object recognition T2 - Proceedings of the 12th International IEEE Conference on Intelligent Transportation Systems, St. Louis, MO, USA, October 3-7, 2009 Y1 - 2009 SN - 978-1-4244-5521-8 U6 - https://doi.org/10.1109/ITSC.2009.5309856 SP - 1 EP - 6 PB - IEEE CY - Piscataway, N.J. ER - TY - CHAP A1 - Marinos, Dionysios A1 - Geiger, Christian T1 - An immersive multiuser music generation interface T2 - Proceedings of the International Conference on Advances in Computer Enterntainment Technology - ACE '09, 29.10.2009 - 31.10.2009, Athens Y1 - 2009 UR - http://portal.acm.org/citation.cfm?doid=1690388 SN - 9781605588643 U6 - https://doi.org/10.1145/1690388.1690486 PB - ACM Press CY - New York ER - TY - JOUR A1 - Ruess, Martin A1 - Pahl, P. J. T1 - An extended QR-solver for large profiled matrices JF - International Journal for Numerical Methods in Engineering Y1 - 2009 U6 - https://doi.org/10.1002/nme.2618 SN - 1097-0207 VL - 79 IS - 11 SP - 1419 EP - 1442 PB - Wiley ER - TY - CHAP A1 - Voigt, Christian A1 - Montero, Calkin Suero A1 - Menichinelli, Massimo ED - Bagnoli, Franco ED - Satsiou, Anna ED - Stavrakakis, Ioannis ED - Nesi, Paolo ED - Pacini, Giovanna ED - Welp, Yanina ED - Tiropanis, Thanassis ED - DiFranzo, Dominic T1 - An Empirically Informed Taxonomy for the Maker Movement T2 - Internet Science Y1 - 2016 SN - 978-3-319-45981-3 U6 - https://doi.org/10.1007/978-3-319-45982-0_17 VL - Lecture Notes in Computer Science, 9934 SP - 189 EP - 204 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Liang, Ke A1 - Ruess, Martin A1 - Abdalla, Mostafa T1 - An eigenanalysis-based bifurcation indicator proposed in the framework of a reduced-order modeling technique for non-linear structural analysis JF - International Journal of Non-Linear Mechanics Y1 - 2016 U6 - https://doi.org/10.1016/j.ijnonlinmec.2016.01.013 SN - 0020-7462 VL - 81 SP - 129 EP - 138 PB - Elsevier ER - TY - JOUR A1 - Magisano, D. A1 - Liang, Ke A1 - Garcea, G. A1 - Leonetti, L. A1 - Ruess, Martin T1 - An efficient mixed variational reduced-order model formulation for nonlinear analyses of elastic shells JF - International Journal for Numerical Methods in Engineering Y1 - 2018 U6 - https://doi.org/10.1002/nme.5629 SN - 1097-0207 VL - 113 IS - 4 SP - 634 EP - 655 PB - Wiley ER - TY - JOUR A1 - Yang, Z. A1 - Ruess, Martin A1 - Kollmannsberger, Stefan A1 - Düster, Alexander A1 - Rank, Ernst T1 - An efficient integration technique for the voxel-based finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2012 U6 - https://doi.org/10.1002/nme.4269 SN - 1097-0207 VL - 91 IS - 5 SP - 457 EP - 471 PB - Wiley ER - TY - CHAP A1 - Mayer, Christian A1 - Pogscheba, Patrick A1 - Marinos, Dionysios A1 - Wöldecke, Björn A1 - Geiger, Christian ED - Chisik, Yoram ED - Geiger, Christian ED - Hasegawa, Shoichi T1 - An audio-visual music installation with dichotomous user interactions T2 - Proceedings of the 11th Conference on Advances in Computer Entertainment Technology, Funchal, 11.11.2014-14.11.2014 Y1 - 2014 UR - https://dl.acm.org/doi/proceedings/10.1145/2663806 SN - 9781450329453 U6 - https://doi.org/10.1145/2663806.2663842 SP - 1 EP - 6 PB - ACM CY - New York ER - TY - JOUR A1 - Wittpahl, Christian A1 - Deegan, Brian A1 - Black, Bob A1 - Braun, Alexander T1 - An analytic-numerical image flicker study to test novel flicker metrics JF - Electronic Imaging: Society for Imaging Science and Technology Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-35671 SN - 2470-1173 IS - 17 SP - 1 EP - 8 PB - Society for Imaging Science and Technology ER - TY - JOUR A1 - Unger, Stefanie A1 - Tisch, Anita A1 - Tophoven, Silke T1 - Age and gender differences in the impact of labour-market transitions on subjective health in Germany JF - Scandinavian journal of public health Y1 - 2018 U6 - https://doi.org/10.1177/1403494817738430 VL - 46 IS - 19 SP - 49 EP - 64 PB - Sage ER - TY - THES A1 - Thiel, Vanessa T1 - African Artivism: Politically engaged art in Sub-Saharan Africa T3 - Hervorragende Abschlussarbeiten im Fachbereich Sozial- und Kulturwissenschaften - 26 KW - Senegal KW - Hip Hop KW - Zimbabwe KW - Satire KW - critical art KW - africa KW - activism KW - WiSe17/18 KW - Masterthesis Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-12035 CY - Düsseldorf ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Diederich, Michael A1 - Pfeiffelmann, Björn T1 - Aerodynamic Optimization of Airfoil Profiles for Small Horizontal Axis Wind Turbines JF - Computation KW - DOAJ Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-25143 SN - 2079-3197 VL - 6 IS - 2 PB - MDPI ER - TY - CHAP A1 - Windte, Jan A1 - Radespiel, Rolf A1 - Neef, Matthias ED - Kroll, Norbert ED - Fassbender, Jens K. T1 - Aerodynamic Analysis of Flapping Airfoil Propulsion at Low Reynolds Numbers T2 - MEGAFLOW - Numerical Flow Simulation for Aircraft Design KW - Lift Curve KW - Chord Length KW - Pitch Motion KW - Laminar Separation Bubble KW - Combine Motion Y1 - 2005 SN - 978-3-540-24383-0 U6 - https://doi.org/10.1007/3-540-32382-1_21 VL - NNFM, 89 SP - 299 EP - 313 PB - Springer-Verlag CY - Berlin, Heidelberg ER - TY - THES A1 - Biedermann, Till M. T1 - Aeroacoustic transfer of leading edge serrations from single aerofoils to low-pressure fan applications T1 - Strömungsakustischer Transfer von Leading Edge Serrations an einzelnen Tragflügeln hin zu Niederdruck-Axialventilatoren N2 - Leading edge serrations are well-known for their aeroacoustic potential in reducing aerofoil-turbulence interaction noise and are also associated with certain aerodynamic advantages. To prepare leading edge serrations for industrial application, two obstacles remain to be addressed. First is a combined analysis of the aeroacoustic and the aerodynamic performance of leading edge serrations to develop optimum designs. Second is the need to examine the transferability of the known effects of leading edge serrations from a single aerofoil to full rotors, which are considered to be the final area of application. This thesis aims to assist in the transfer of a well-investigated aerofoil with serrated leading edges from the rigid to the rotating domain. With this purpose, a single aerofoil type is selected and thoroughly analysed, experimentally and numerically, to generate a reliable data basis for aerodynamic performance and noise reduction capability. Aside from gathering information on the overall performance, the spatial distribution of the noise sources is localised, and the spectral composition of the noise reduction is found to follow a clearly defined scaling law. Aerodynamically, generated vortices are found to be responsible for a complex three-dimensional separation mechanism of the leading edge serrations, causing a delay of stall. The generated data basis is then used to design low-pressure axial fans of minimum complexity by keeping the initially chosen aerofoil type. The experimentally identified noise reduction mechanisms for the serrated axial fans are found to be more diverse than the single aerofoil and highly dependent on the inflow conditions and the operation point of the fan. A highly similar pattern for the spectral scaling of the noise reduction supports the finding that at optimum operation conditions, the previously identified noise reduction mechanisms for the single aerofoils are transferable to the rotating domain. On the other hand, additional aerodynamic mechanisms are found to dominate the noise reduction for the instability region of the fan, also contributing to reduced blade-to-blade interaction effects. Moreover, the blade-tip leakage flow is altered by delaying the development of coherent structures. The next step towards a more general description of the aeroacoustic and aerodynamic dependencies is developing a comprehensive model based on artificial neural networks. This model allows a combined analysis of the aerodynamic and acoustic performance of rotors with serrated leading edges and shows an accurate prediction of the overall performance and the spectral composition of the radiated noise. It also enables the development of multi-objective optima for serration designs and motivates further studies into the generalisability of the observed trends. Furthermore, the developed model represents a feasible tool to create tailored serration designs for maximum efficiency in both aeroacoustics and aerodynamics, contributing to the development of future low-noise fans and rotating machinery. N2 - Leading Edge Serrations sind hinlänglich für ihr Potential zur Reduktion von turbulenzinduziertem Schall bekannt. Ebenso können sie sich als aerodynamisch vorteilhaft erweisen. Mit dem Ziel, Leading Edge Serrations industriellen Anwendungen zugänglich zu machen, verbleiben primär noch zwei Hemmnisse. Zum einen die Notwendigkeit einer kombinierten Bewertung des aerodynamischen und des aeroakustischen Potentials mit dem Ziel der Identifikation optimaler Designansätze. Zum anderen sind Aussagen hinsichtlich der Übertragbarkeit der bekannten Schallreduktionsmechanismen von einem einzelnen Tragflügel hin zu rotierenden Strömungsmaschinen zu treffen, da letztere das finale Anwendungsgebiet von Leading Edge Serrations darstellen. Diese Arbeit zielt darauf ab, bei dem Transfer eines umfassend analysierten Tragflügeldesigns mit Leading Edge Serrations hin zu einem rotierenden System zu assistieren. Hierzu wird ein für spätere rotierende Anwendungen sinnvolles Tragflügelprofil gewählt und sowohl experimentell als auch numerisch umfassend untersucht, um eine Datenbasis des aerodynamischen und aeroakustischen Potentials zu generieren. Neben Informationen über die globalen Eigenschaften, wurde ebenfalls die räumliche Lage der Schallquellen lokalisiert. Zudem konnte der Verlauf des spektralen Schallreduktionsvermögens einer klaren Gesetzmäßigkeit zugeordnet werden. In Bezug auf die Aerodynamik wurden Wirbelstrukturen, welche sich an den Leading Edge Serrations bilden, als ursächlich für einen komplexen dreidimensionalen Ablösemechanismus identifiziert, welcher eine verzögerte Strömungsablösung bewirkt. Unter Beibehaltung des gewählten Tragflügelprofils wurde die generierte Datenbasis in einem zweiten Schritt zur Auslegung von axialen Niederdruckventilatoren niedriger Komplexität genutzt. Die hier experimentell identifizieren Schallreduktionsmechanismen sind, im Vergleich zu einem einzelnen Tragflügel, deutlich diverser und weisen eine klare Abhängigkeit vom Betriebspunkt des Ventilators sowie von den Einflussparametern auf. Unter optimalen Zuströmbedingungen kann eine klare Übertragbarkeit der Effekte vom ebenen in das rotierende System gezeigt werden. Im Gegensatz wird das Schallreduktionspotential im Instabilitätsbereich des Ventilators durch aerodynamische Strömungsphänomene dominiert, welche zudem zu einer vorteilhaften Beeinflussung von Schaufelinteraktionen beitragen. Des Weiteren wurde durch den Einsatz von Rotoren mit Leading Edge Serrations eine verzögerte Entstehung von kohärenten Strukturen im Blattspitzenbereich nachgewiesen. Um einen weiteren Schritt in Richtung einer globalen Beschreibung der erhaltenen aeroakustischen und aerodynamischen Abhängigkeiten zu gehen, wurde ein umfassendes Modell generiert, welches auf dem Training künstlicher neuronaler Netze beruht. Das generierte Modell ermöglicht eine kombinierte Prognose der aerodynamischen und aeroakustischen Performance der getesteten Prototypen und weist sowohl im Zeitbereich als auch hinsichtlich der spektralen Zusammensetzung der Signale eine hohe Prognosegüte auf. Dies ermöglicht die Definition multikriterieller Optima bezüglich des Serration Designs und motiviert weiterführende Studien hinsichtlich einer Generalisierbarkeit der beobachteten Trends. Schlussendlich ermöglicht das generierte Modell maßgeschneiderte Designansätze für eine maximale aerodynamische und aeroakustische Effizienz, was einen sinnvollen Beitrag zur zukünftigen Entwicklungen schallarmer Ventilatoren und Strömungsmaschinen darstellt. KW - aeroacoustics KW - aerodynamics KW - low-pressure axial fan KW - leading edge serrations KW - artificial neural networks KW - künstliche neuronale Netze KW - Vorderkantenzacken KW - Niederdruck-Axialventilatoren KW - Aerodynamik KW - Strömungsakustik Y1 - 2019 U6 - https://doi.org/10.14279/depositonce-9075 PB - Technische Universität Berlin CY - Berlin ER - TY - JOUR A1 - Winkler, Michael A1 - Becker, Klaus A1 - Doolan, Con A1 - Kameier, Frank A1 - Paschereit, Christian Oliver T1 - Aeroacoustic Effects of a Cylinder-Plate Configuration JF - AIAA Journal Y1 - 2012 U6 - https://doi.org/10.2514/1.j051578 VL - 50 IS - 7 SP - 1614 EP - 1620 PB - ARC ER - TY - CHAP A1 - Echternacht, David A1 - Heuberger, Daniel A1 - Breuer, Christopher A1 - Linnemann, Christian A1 - Moser, Albert T1 - Advantageous positions for HVDC terminals in Europe T2 - 2013 IEEE Energytech, 21.05.2013 - 23.05.2013, Cleveland Y1 - 2013 UR - http://ieeexplore.ieee.org/document/6645291/ SN - 978-1-4673-4444-9 U6 - https://doi.org/10.1109/EnergyTech.2013.6645291 SP - 1 EP - 5 PB - IEEE ER - TY - JOUR A1 - Beniddir, Mehdi A. A1 - Kang, Kyo Bin A1 - Genta-Jouve, Grégory A1 - Huber, Florian A1 - Rogers, Simon A1 - van der Hooft, Justin J. J. T1 - Advances in decomposing complex metabolite mixtures using substructure- and network-based computational metabolomics approaches JF - Natural Product Reports Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34772 SN - 1460-4752 VL - 38 IS - 11 SP - 1967 EP - 1993 PB - The Royal Society of Chemistry ER - TY - THES A1 - Braun, Alexander T1 - Addressing Single Yb+ Ions: A new scheme for quantum computing in linear ion traps Y1 - 2007 SN - 978-3-86727-276-6 PB - Cuvillier Verlag CY - Göttingen ER - TY - JOUR A1 - Beyer, Marc-André A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Adaptive exact linearization control of batch polymerization reactors using a Sigma-Point Kalman Filter JF - Journal of Process Control N2 - The Chylla–Haase polymerization reactor is widely accepted as a benchmark process for the evaluation of control strategies for batch reactors. In this contribution a control concept based on Exact I/O-Linearization is proposed and compared to a conventional cascade control structure. In order to adapt the exact linearization control strategy to various polymerization products and batch conditions, an advanced probabilistic inference algorithm (Sigma-Point Kalman Filter) is applied and investigated. Sigma-Point Kalman Filters have the major improvement of simplified implementation compared to local linearization methods (i.e. Extended Kalman Filter) because no analytical Jacobians are required. Stochastic simulation studies are introduced and show the effectiveness, accuracy and benefit of the control concept. Within several scenarios a satisfying robustness against structural errors in the underlying model equations for the nonlinear control law and the inference algorithm is demonstrated. Furthermore it is pointed out, that with little effort in reassembling the plant design, control performance can be improved significantly. KW - Batch process operation KW - Exact I/O-Linearization control KW - Online parameter estimation KW - Sigma-Point Kalman Filter Y1 - 2008 UR - 1873-2771 U6 - https://doi.org/10.1016/j.jprocont.2007.12.002 VL - 18 IS - 7-8 SP - 663 EP - 675 PB - Elsevier ER - TY - CHAP A1 - Luizard, Paul A1 - Steffens, Jochen A1 - Weinzierl, Stefan ED - Lautenbach, Margriet ED - Witew, Ingo B. ED - de Vries, Diemer ED - Hornikx, Maarten T1 - Adaptation of singers to physical and virtual room acoustics T2 - Proceedings of the International Symposium on Room Acoustics (ISRA) 2019, Amsterdam, Netherlands. Y1 - 2019 SN - 978-90-9032895-9 U6 - https://doi.org/10.18154/RWTH-CONV-240115 PB - Nederlands Akoestisch Genootschap CY - Heerde ER - TY - JOUR A1 - Preciado López, Magdalena A1 - Huber, Florian A1 - Grigoriev, Ilya A1 - Steinmetz, Michel O. A1 - Akhmanova, Anna A1 - Koenderink, Gijsje H. A1 - Dogterom, Marileen T1 - Actin-microtubule coordination at growing microtubule ends JF - Nature Communications N2 - To power dynamic processes in cells, the actin and microtubule cytoskeletons organize into complex structures. Although it is known that cytoskeletal coordination is vital for cell function, the mechanisms by which cross-linking proteins coordinate actin and microtubule activities remain poorly understood. In particular, it is unknown how the distinct mechanical properties of different actin architectures modulate the outcome of actin-microtubule interactions. To address this question, we engineered the protein TipAct, which links growing microtubule ends via end-binding proteins to actin filaments. We show that growing microtubules can be captured and guided by stiff actin bundles, leading to global actin-microtubule alignment. Conversely, growing microtubule ends can transport, stretch and bundle individual actin filaments, thereby globally defining actin filament organization. Our results provide a physical basis to understand actin-microtubule cross-talk, and reveal that a simple cross-linker can enable a mechanical feedback between actin and microtubule organization that is relevant to diverse biological contexts. KW - DOAJ Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34878 SN - 2041-1723 VL - 5 PB - Springer Nature ER - TY - JOUR A1 - Siccardi, Stefano A1 - Adamatzky, Andrew A1 - Tuszyński, Jack A1 - Huber, Florian A1 - Schnauß, Jörg T1 - Actin networks voltage circuits JF - Physical Review E Y1 - 2020 U6 - https://doi.org/10.1103/PhysRevE.101.052314 SN - 2470-0053 VL - 101 IS - 5-1 PB - American Physical Society (APS) ER - TY - JOUR A1 - Adamatzky, Andrew A1 - Schnauß, Jörg A1 - Huber, Florian T1 - Actin droplet machine JF - Royal Society Open Science N2 - The actin droplet machine is a computer model of a three-dimensional network of actin bundles developed in a droplet of a physiological solution, which implements mappings of sets of binary strings. The actin bundle network is conductive to travelling excitations, i.e. impulses. The machine is interfaced with an arbitrary selected set of k electrodes through which stimuli, binary strings of length k represented by impulses generated on the electrodes, are applied and responses are recorded. The responses are recorded in a form of impulses and then converted to binary strings. The machine's state is a binary string of length k: if there is an impulse recorded on the ith electrode, there is a '1' in the ith position of the string, and '0' otherwise. We present a design of the machine and analyse its state transition graphs. We envisage that actin droplet machines could form an elementary processor of future massive parallel computers made from biopolymers. Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34675 UR - http://www.ncbi.nlm.nih.gov/pubmed/31903204 SN - 2054-5703 N1 - A.A. was partially supported by EPSRC grant no. EP/P016677/1. The authors declare that they have no competing interests. VL - 6 IS - 12 PB - Royal Soc. Publ. ER - TY - CHAP A1 - Huldtgren, Alina A1 - Pedro, Gabriela Ascencio San A1 - Pohlmeyer, Anna E. A1 - Herrara, Natalia A.Romero T1 - AAL-technology acceptance through experience T2 - Proceedings - PERVASIVEHEALTH 2014: 8th International Conference on Pervasive Computing Technologies for Healthcare, Oldenburg Germany, May 20 - 23, 2014 KW - Ambient assisted living KW - Technology acceptance Y1 - 2014 SN - 9781631900112 U6 - https://doi.org/10.4108/icst.pervasivehealth.2014.254934 SP - 170 EP - 173 PB - Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering CY - Brussels ER - TY - CHAP A1 - Geiger, Christian A1 - Reckter, Holger A1 - Dumitrescu, Roman A1 - Kahl, Sascha A1 - Berssenbrügge, Jan ED - Jacko, Julie A. T1 - A Zoomable User Interface for Presenting Hierarchical Diagrams on Large Screens T2 - Human-Computer Interaction. Novel Interaction Methods and Techniques, 13th International Conference, HCI International 2009, San Diego, CA, USA, July 19-24, 2009, Proceedings, Part II Y1 - 2009 SN - 978-3-642-02576-1 U6 - https://doi.org/10.1007/978-3-642-02577-8_87 VL - 5611 SP - 791 EP - 800 PB - Springer CY - Berlin, Heidelberg ER - TY - JOUR A1 - Amano, Katsumi A1 - Matsushita, Fumio A1 - Yanagawa, Hirofumi A1 - Cohen, Michael A1 - Herder, Jens A1 - Martens, William A1 - Koba, Yoshiharu A1 - Tohyama, Mikio T1 - A Virtual Reality Sound System Using Room-Related Transfer Functions Delivered Through a Multispeaker Array: the PSFC at the University of Aizu Multimedia Center JF - TVRSJ N2 - The PSFC, or Pioneer Sound Field Controller, is a DSP-driven hemispherical loudspeaker array, installed at the University of Aizu Multimedia Center. The PSFC features realtime manipulation of the primary components of sound spatialization for each of two audio sources located in a virtual environment, including the content (apparent direction and distance) and context (room characteristics: reverberation level, room size and liveness). In an alternate mode, it can also direct the destination of the two separate input signals across 14 loudspeakers, manipulating the direction of the virtual sound sources with no control over apparent distance other than that afforded by source loudness (including no simulated environmental reflections or reverberation). The PSFC speaker dome is about 10 m in diameter, accommodating about fifty simultaneous users, including about twenty users comfortably standing or sitting near its ``sweet spot,'' the area in which the illusions of sound spatialization are most vivid. Collocated with a large screen rear-projection stereographic display, the PSFC is intended for advanced multimedia and virtual reality applications. KW - audio signal processing, audio telecommunications KW - auralization KW - calm technology KW - directional mixing console KW - multichannel sound reproduction KW - room-related transfer functions KW - roomware KW - sound localization KW - virtual conferencing environment Y1 - 1998 U6 - https://doi.org/10.18974/tvrsj.3.1_1 VL - 3 IS - 1 SP - 1 EP - 12 PB - J-STAGE ER - TY - CHAP A1 - Herder, Jens A1 - Myszkowski, Karol A1 - Kunii, Tosiyasu L. A1 - Ibusuki, Masumi ED - Weghorst, Suzanne J. ED - Sieburg, Hans B. ED - Morgan, Karen S. T1 - A Virtual Reality Interface to an Intelligent Dental Care System T2 - Medicine Meets Virtual Reality 4 Y1 - 1996 SP - 17 EP - 20 PB - IOS Press CY - Amsterdam ER - TY - JOUR A1 - Benim, Ali Cemal A1 - Canal, Cansu Deniz A1 - Boke, Yakup Erhan T1 - A Validation Study for RANS Based Modelling of Swirling Pulverized Fuel Flames JF - Energies N2 - A swirling pulverized coal flame is computationally investigated. A Eulerian–Lagrangian formulation is used to describe the two-phase flow. Turbulence is modelled within a RANS (Reynolds averaged numerical simulation) framework. Four turbulence viscosity- (TV) based models, namely the standard k-ε model, realizable k-ε model, renormalization group theory k-ε model, and the shear stress transport k-ω model are used. In addition, a Reynolds stress transport model (RSM) is employed. The models are assessed by comparing the predicted velocity fields with the measurements of other authors. In terms of overall average values, the agreement of the predictions to the measurements is observed to be within the range 20–40%. A better performance of the RSM compared to the TV models is observed, with a nearly twice as better overall agreement to the experiments, particularly for the swirl velocity. In the second part of the investigation, the resolution of the discrete particle phase in modelling the turbulent particle dispersion (TPD) and particle size distribution (SD) is investigated. Using the discrete random walk model for the TPD, it is shown that even five random walks are sufficient for an accuracy that is quite high, with a less than 1% mean deviation from the solution obtained by thirty random walks. The approximation of the measured SD is determined by a continuous Rosin–Rammler distribution function, and inaccuracies that can occur in its subsequent discretization are demonstrated and discussed. An investigation on the resolution of the SD by discrete particle size classes (SC) indicates that 12 SC are required for an accuracy with a less than 1% mean deviation from the solution with 18 SC. Although these numbers may not necessarily be claimed to be sufficiently universal, they may serve as guidance, at least for SD with similar characteristics KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-37365 SN - 1996-1073 VL - 14 IS - 21 PB - MDPI ER - TY - JOUR A1 - Kernebeck, Sven A1 - Holle, Daniela A1 - Pogscheba, Patrick A1 - Jordan, Felix A1 - Mertl, Fabian A1 - Huldtgren, Alina A1 - Bader, Sebastian A1 - Kirste, Thomas A1 - Teipel, Stefan A1 - Holle, Bernhard A1 - Halek, Margareta T1 - A Tablet App- and Sensor-Based Assistive Technology Intervention for Informal Caregivers to Manage the Challenging Behavior of People With Dementia (the insideDEM Study): Protocol for a Feasibility Study JF - JMIR research protocols Y1 - 2019 U6 - https://doi.org/10.2196/11630 VL - 8 IS - 2 PB - JMIR ER - TY - CHAP A1 - Côté, Isabelle A1 - Hatebur, Denis A1 - Heisel, Maritta A1 - Schmidt, Holger A1 - Wentzlaff, Ina T1 - A Systematic Account of Problem Frames T2 - Proceedings of the 12th European Conference on Pattern Languages of Programs (EuroPLoP '2007), Irsee, Germany, July 4-8, 2007. N2 - We give an enumeration of possible problem frames, based on domain characteristics, and comment on the usefulness of the obtained frames. In particular, we investigate problem domains and their characteristics in detail. This leads to fine-grained criteria for describing problem domains. As a result, we identify a new type of problem domain and come up with integrity conditions for developing useful problem frames. Taking a complete enumeration of possible problem frames (with at most three problem domains, of which only one is constrained) as a basis, we find 8 new problem frames, 7 of which we consider as useful in practical software development. KW - problem frames KW - systematic account Y1 - 2008 SP - 749 EP - 767 PB - Universitätsverlag Konstanz CY - Konstanz ER - TY - JOUR A1 - Queval, Loic A1 - Coty, Alain A1 - Vido, Lionel A1 - Gottkehaskamp, Raimund A1 - Multon, Bernard T1 - A Switched Reluctance Motor Drive Using Photovoltaic Transistors: Principle, Prototype, Experimental, and Numerical Results JF - IEEE Transactions on Industry Applications Y1 - 2017 U6 - https://doi.org/10.1109/TIA.2017.2718493 SN - 0093-9994 VL - 53 IS - 5 SP - 4886 EP - 4893 PB - IEEE ER - TY - CHAP A1 - Macher, Georg A1 - Brenner, Eugen A1 - Messnarz, Richard A1 - Ekert, Damjan A1 - Stolfa, Jakub A1 - Stolfa, Svatopluk A1 - Niemann, Jörg A1 - Fussenecker, Claudia A1 - Schoening, Marius A1 - Paul, Alexander A1 - Pavlov, Nikolay A1 - Gigov, Boyko A1 - Pavlova, Maria Stefanova ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - A Study of Electric Powertrain Engineering - Its Requirements and Stakeholders Perspectives T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_29 SP - 396 EP - 407 PB - Springer Nature Switzerland CY - Cham ER - TY - JOUR A1 - Mabrouk, Riheb A1 - Naji, Hassane A1 - Benim, Ali Cemal A1 - Dhahri, Hacen T1 - A State of the Art Review on Sensible and Latent Heat Thermal Energy Storage Processes in Porous Media: Mesoscopic Simulation JF - Applied Sciences KW - DOAJ Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40343 VL - 12 IS - 14 PB - MDPI ER - TY - CHAP A1 - Ishikawa, Kimitaka A1 - Hirose, Minefumi A1 - Herder, Jens T1 - A Sound Spatialization Server for a Speaker Array as an Integrated Part of a Virtual Environment T2 - IEEE YUFORIC Germany 98 N2 - Spatial sound plays an important role in virtual reality environments, allowing orientation in space, giving a feeling of space, focusing the user on events in the scene, and substituting missing feedback cues (e.g., force feedback). The sound spatialization framework of the University of Aizu, which supports number of spatialization backends, has been extended to include a sound spatialization server for a multichannel loudspeaker array (Pioneer Sound Field Control System). Our goal is that the spatialization server allows easy integration into virtual environments. Modeling of distance cues, which are essential for full immersion, is discussed. Furthermore, the integration of this prototype into different applications allowed us to reveal the advantages and problems of spatial sound for virtual reality environments. KW - distance cue KW - loudspeaker array KW - psychoacoustic KW - sound spatialization server Y1 - 1998 UR - http://vsvr.medien.hs-duesseldorf.de/publications/ve98-spatial-server/welcome.html PB - IEEE CY - Stuttgart ER - TY - THES A1 - Herder, Jens T1 - A Sound Spatialization Resource Management Framework N2 - In a virtual reality environment, users are immersed in a scene with objects which might produce sound. The responsibility of a VR environment is to present these objects, but a practical system has only limited resources, including spatialization channels (mixels), MIDI/audio channels, and processing power. A sound spatialization resource manager, introduced in this thesis, controls sound resources and optimizes fidelity (presence) under given conditions, using a priority scheme based on psychoacoustics. Objects which are spatially close together can be coalesced by a novel clustering algorithm, which considers listener localization errors. Application programmers and VR scene designers are freed from the burden of assigning mixels and predicting sound source locations. The framework includes an abstract interface for sound spatialization backends, an API for the VR environments, and multimedia authoring tools. KW - audio rendering KW - human perception KW - Resource Management KW - Sound Spatialization Y1 - 1999 UR - http://vsvr.medien.hs-duesseldorf.de/publications/phd99-abstract.html PB - University of Tsukuba CY - Tsukuba ER -