@article{LehmannWittpahlZakouretal.2019, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Modeling realistic optical aberrations to reuse existing drive scene recordings for autonomous driving validation}, series = {Journal of Electronic Imaging}, volume = {28}, journal = {Journal of Electronic Imaging}, number = {1}, publisher = {SPIE}, issn = {1560-229X}, doi = {10.1117/1.JEI.28.1.013005}, pages = {013005}, year = {2019}, abstract = {Training autonomous vehicles requires lots of driving sequences in all situations. Collecting and labeling these drive scenes is a very time-consuming and expensive process. Currently, it is not possible to reuse these drive scenes with different optical properties, because there exists no numerically efficient model for the transfer function of the optical system. We present a numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network. The novelty lies in the portability and the parameterization of this model. We present a lens measurement series, yielding a numerical function for the PSF that depends only on the parameters defocus, field, and azimuth. By convolving existing images and videos with this PSF, we generate images as if seen through the measured lens. The methodology applies to any optical scenario, but we focus on the context of autonomous driving, where the quality of the detection algorithms depends directly on the optical quality of the used camera system. With this model, it is possible to reuse existing recordings, with the potential to avoid millions of test drive miles. The parameterization of the optical model allows for a method to validate the functional and safety limits of camera-based advanced driver assistance systems based on the real, measured lens actually used in the product.}, language = {en} } @article{LeadbetterHortvonLoewisetal.2012, author = {Leadbetter, S. J. and Hort, M. C. and von L{\"o}wis, S. and Weber, Konradin and Witham, C. S.}, title = {Modeling the resuspension of ash deposited during the eruption of Eyjafjallaj{\"o}kull in spring 2010}, series = {Journal of Geophysical Research: Atmospheres}, volume = {117}, journal = {Journal of Geophysical Research: Atmospheres}, number = {D20}, publisher = {American Geophysical Union (AGU)}, issn = {0148-0227}, doi = {10.1029/2011JD016802}, year = {2012}, abstract = {Eyjafjallaj{\"o}kull, a volcano in southern Iceland, erupted explosively in April and May 2010 depositing ash over a region of more than 3000 km2 to the east and southeast of the volcano. This deposited ash has been frequently remobilized by the wind causing concern for the health of Icelanders living in the region. An investigation was carried out to determine whether it would be possible to produce forecasts of days when high airborne ash concentrations were likely to occur. Information about the spatially varying surface characteristics of the region of deposited ash is not available so in the modeling approach adopted here ash is released from the surface at a rate proportional to the cube of the excess friction velocity (local friction velocity minus a threshold) only when the friction velocity exceeds a threshold. Movement of the resuspended ash is then modeled in a Lagrangian dispersion model. Modeled ash concentrations are compared to observed concentrations from two periods; PM10 observations between 23 May and 2 July 2010 and airborne particle counts between 21 September 2010 and 16 February 2011. More than 66\% of the resuspension episodes between May and July are captured by the model and the relative magnitudes of the modeled episodes in this period are in good agreement with the observations. 66\% of episodes between October and February are also captured by the model although there is an increase in the false alarm rate which appears to be due to the influence of precipitation.}, language = {en} } @article{VersuemerSteffensBlaettermannetal.2020, author = {Vers{\"u}mer, Siegbert and Steffens, Jochen and Bl{\"a}ttermann, Patrick and Becker-Schweitzer, J{\"o}rg}, title = {Modelling evaluations of low-level sounds in everyday situations using linear machine learning for variable selection}, series = {Frontiers in Psychology}, volume = {11}, journal = {Frontiers in Psychology}, publisher = {Frontiers}, issn = {1664-1078}, doi = {10.3389/fpsyg.2020.570761}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-23779}, year = {2020}, language = {en} } @article{BenimEppleKrohmer2005, author = {Benim, Ali Cemal and Epple, B. and Krohmer, B.}, title = {Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation}, series = {Progress in Computational Fluid Dynamics, An International Journal}, volume = {5}, journal = {Progress in Computational Fluid Dynamics, An International Journal}, number = {6}, publisher = {inderscience}, doi = {10.1504/pcfd.2005.007067}, pages = {345}, year = {2005}, language = {en} } @inproceedings{JuerjensOchoaSchmidtetal.2011, author = {J{\"u}rjens, Jan and Ochoa, Mart{\´i}n and Schmidt, Holger and Marchal, Lo{\"i}c and Houmb, Siv Hilde and Islam, Shareeful}, title = {Modelling Secure Systems Evolution: Abstract and Concrete Change Specifications}, series = {Formal Methods for Eternal Networked Software Systems: 11th International School on Formal Methods for the Design of Computer, Communication and Software Systems, SFM 2011, Bertinoro, Italy, June 13-18, 2011. Advanced Lectures}, volume = {LNCS, 6659}, booktitle = {Formal Methods for Eternal Networked Software Systems: 11th International School on Formal Methods for the Design of Computer, Communication and Software Systems, SFM 2011, Bertinoro, Italy, June 13-18, 2011. Advanced Lectures}, editor = {Bernardo, Marco and Issarny, Val{\´e}rie}, publisher = {Springer}, address = {Berlin, Heidelberg}, isbn = {978-3-642-21455-4}, doi = {10.1007/978-3-642-21455-4_15}, pages = {504 -- 526}, year = {2011}, abstract = {Developing security-critical systems is difficult, and there are many well-known examples of vulnerabilities exploited in practice. In fact, there has recently been a lot of work on methods, techniques, and tools to improve this situation already at the system specification and design. However, security-critical systems are increasingly long-living and undergo evolution throughout their lifetime. Therefore, a secure software development approach that supports maintaining the needed levels of security even through later software evolution is highly desirable. In this chapter, we recall the UMLsec approach to model-based security and discuss on tools and techniques to model and verify evolution of UMLsec models.}, language = {en} } @inproceedings{EchternachtStaggePriebeetal.2015, author = {Echternacht, David and Stagge, Hanno and Priebe, Jens and Wiernes, Pablo Ezequiel and Jagielski, Kai and Petri, Anne-Kathrin and Drießen, Sarah and Trevisan, Bianka and Digmayer, Claas and Oberst, Christian A. and Keysselitz, B{\"a}rbel and Kremer, Martin and Sieber, Sandra and Krapp, Stefan and Jakobs, Eva-Maria and Frenz, Martin and Lohrberg, Frank and Wachten, Kunibert and Moser, Albert}, title = {Modelling, Planning, Design and Evaluation of DC-Distribution Grids}, series = {International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn}, booktitle = {International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn}, publisher = {VDE-Verl.}, address = {Bonn}, pages = {289 -- 295}, year = {2015}, language = {en} } @misc{Mehlhorn2017, author = {Mehlhorn, Nils}, title = {Modern Cross-Platform Development for Mobile Applications}, address = {D{\"u}sseldorf}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-11276}, pages = {43}, year = {2017}, abstract = {While developing for multiple platforms at once seems like a convenient solution, there are several challenges arising when trying to abstract the entire mobile development. This paper is meant to evaluate current cross-platform development for mobile applications. The background for its necessity, its conceptual approach and the problems to face when developing cross-platform were determined and explained in detail. Afterwards, certain solutions were evaluated against the former insights. Based on the results, an informed discussion and conclusion was performed. The mobile environment consist of only two big players by now, Android and iOS. These operating systems differ in architecture, design and consequently in the way applications are developed for each of them. Therefore, high demands are made towards cross-platform solutions. Tools which allow for the creation of applications for multiple platforms at once have to match native applications in regard to user experience and performance. At the same time they need to be able to optimize developments with the goal of being cost efficient. Apache Cordova, Xamarin and NativeScript were selected for evaluation in regard to their ability to meet these requirements. Cordova acts as the comparison group of cross-platform tools. It is the big player in the field and there are reasons for this. However, aspiring solutions with higher nativity and ambitious approaches are emerging. Xamarin and NativeScript deliver top quality results while offering loosely coupled developments. Therefore it is possible to develop high quality applications and still benefit from the advantages of platform-independent solutions. As a consequence mobile development is about to change in the foreseeable future. More sophisticated approaches may lead to a higher number of developments done cross-platform, and rightfully so.}, language = {en} } @inproceedings{HurdTruckenmuellerThammetal.2005, author = {Hurd, Paul and Truckenmueller, Frank and Thamm, Norbert and Pollak, Helmut and Neef, Matthias and Deckers, Mathias}, title = {Modern Reaction HP/IP Turbine Technology Advances and Experiences}, series = {Proceedings of the ASME Power Conference - 2005 : includes papers from the 2005 International Conference on Power Engineering (ICOPE) ; presented at the 2005 ASME Power Conference, April 5 - 7, 2005, Chicago, Illinois, USA}, booktitle = {Proceedings of the ASME Power Conference - 2005 : includes papers from the 2005 International Conference on Power Engineering (ICOPE) ; presented at the 2005 ASME Power Conference, April 5 - 7, 2005, Chicago, Illinois, USA}, publisher = {ASME}, address = {New York}, isbn = {0-7918-4182-0}, doi = {10.1115/PWR2005-50085}, pages = {425 -- 435}, year = {2005}, language = {en} } @article{EliassonPalssonWeber2011, author = {El{\´i}asson, J{\´o}nas and Palsson, Asgeir and Weber, Konradin}, title = {Monitoring ash clouds for aviation}, series = {Nature}, volume = {475}, journal = {Nature}, number = {7357}, publisher = {Springer Nature}, doi = {10.1038/475455b}, pages = {455}, year = {2011}, language = {en} } @article{GalbanMaderwaldEggebrechtetal.2005, author = {Galban, Craig and Maderwald, Stefan and Eggebrecht, Holger and Grote, Wolfgang and de Greiff, A. and Uffmann, K. and Ladd, M. E.}, title = {Monitoring the Effects of Chronic Obstructive Pulmonary Disease on Muscle Elasticity by MR Elastography}, series = {Proc. Intl. Soc. Mag. Reson. Med.}, volume = {13}, journal = {Proc. Intl. Soc. Mag. Reson. Med.}, pages = {2015}, year = {2005}, abstract = {Men afflicted with chronic obstructive pulmonary disease (COPD) show signs of muscle dysfunction, such as increased muscle fatigue and acidosis during exercise. We hypothesize that muscle elasticity of the lower extremities differs between patients with COPD and age-related controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0\%, 5\%, 10\%, 15\%, and 20\% of the subject's maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in the maximum applied force.}, language = {en} } @article{AgneseSalvador2012, author = {Agnese, Pablo and Salvador, Pablo F.}, title = {More alike than different: the Spanish and Irish labour markets before and after the crisis}, series = {IZA Journal of European Labor Studies}, volume = {1}, journal = {IZA Journal of European Labor Studies}, number = {1}, publisher = {Springer Nature}, issn = {2193-9012}, doi = {10.1186/2193-9012-1-9}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-28185}, pages = {9}, year = {2012}, language = {en} } @inproceedings{MuellerMeuterPark2008, author = {M{\"u}ller, Dennis and Meuter, Mirko and Park, Su-Birm}, title = {Motion segmentation using interest points}, series = {2008 IEEE Intelligent Vehicles Symposium}, booktitle = {2008 IEEE Intelligent Vehicles Symposium}, publisher = {IEEE}, isbn = {978-1-4244-2568-6}, doi = {10.1109/IVS.2008.4621239}, pages = {19 -- 24}, year = {2008}, language = {en} } @inproceedings{LadwigEversJansenetal.2020, author = {Ladwig, Philipp and Evers, Kester and Jansen, Eric J. and Fischer, Ben and Nowottnik, David and Geiger, Christian}, title = {MotionHub: Middleware for Unification of Multiple Body Tracking Systems}, series = {Proceedings of the 7th International Conference on Movement and Computing: MOCO '20: 7th International Conference on Movement and Computing, Jersey City, 15.07.2020-17.07.2020}, booktitle = {Proceedings of the 7th International Conference on Movement and Computing: MOCO '20: 7th International Conference on Movement and Computing, Jersey City, 15.07.2020-17.07.2020}, publisher = {ACM}, address = {New York}, isbn = {9781450375054}, doi = {10.1145/3401956.3404185}, pages = {1 -- 8}, year = {2020}, language = {en} } @inproceedings{Dahm2007, author = {Dahm, Markus}, title = {MP3ergo - Usability of MP3 players}, series = {proc. 10th intl conf Humans and Computers, Duesseldorf}, booktitle = {proc. 10th intl conf Humans and Computers, Duesseldorf}, address = {D{\"u}sseldorf}, pages = {123 -- 128}, year = {2007}, abstract = {Listening to music played by small MP3-players is almost as ubiquituous as talking over mobile phones. In this paper we analyse interaction elements and usabilty of current MP3-players. To determine the usability, an empirical study based on a website that presented three simulated MP3-players was performed with over 1000 participants. The results show that, despite most marketing claims, some interaction devices are not as intuitive and really suitable for the task as they schould be. Also we found some surprising results concerning erroneous usage of navigation keys.}, language = {en} } @article{HubervanderBurgvanderHooftetal.2021, author = {Huber, Florian and van der Burg, Sven and van der Hooft, Justin J. J. and Ridder, Lars}, title = {MS2DeepScore: a novel deep learning similarity measure to compare tandem mass spectra}, series = {Journal of Cheminformatics}, volume = {13}, journal = {Journal of Cheminformatics}, number = {1}, publisher = {Cold Spring Harbor Laboratory}, issn = {1758-2946}, doi = {10.1186/s13321-021-00558-4}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-34847}, pages = {84}, year = {2021}, abstract = {Mass spectrometry data is one of the key sources of information in many workflows in medicine and across the life sciences. Mass fragmentation spectra are generally considered to be characteristic signatures of the chemical compound they originate from, yet the chemical structure itself usually cannot be easily deduced from the spectrum. Often, spectral similarity measures are used as a proxy for structural similarity but this approach is strongly limited by a generally poor correlation between both metrics. Here, we propose MS2DeepScore: a novel Siamese neural network to predict the structural similarity between two chemical structures solely based on their MS/MS fragmentation spectra. Using a cleaned dataset of > 100,000 mass spectra of about 15,000 unique known compounds, we trained MS2DeepScore to predict structural similarity scores for spectrum pairs with high accuracy. In addition, sampling different model varieties through Monte-Carlo Dropout is used to further improve the predictions and assess the model's prediction uncertainty. On 3600 spectra of 500 unseen compounds, MS2DeepScore is able to identify highly-reliable structural matches and to predict Tanimoto scores for pairs of molecules based on their fragment spectra with a root mean squared error of about 0.15. Furthermore, the prediction uncertainty estimate can be used to select a subset of predictions with a root mean squared error of about 0.1. Furthermore, we demonstrate that MS2DeepScore outperforms classical spectral similarity measures in retrieving chemically related compound pairs from large mass spectral datasets, thereby illustrating its potential for spectral library matching. Finally, MS2DeepScore can also be used to create chemically meaningful mass spectral embeddings that could be used to cluster large numbers of spectra. Added to the recently introduced unsupervised Spec2Vec metric, we believe that machine learning-supported mass spectral similarity measures have great potential for a range of metabolomics data processing pipelines.}, language = {en} } @article{deJongeLouwenChekmenevaetal.2023, author = {de Jonge, Niek F. and Louwen, Joris J. R. and Chekmeneva, Elena and Camuzeaux, Stephane and Vermeir, Femke J. and Jansen, Robert S. and Huber, Florian and van der Hooft, Justin J. J.}, title = {MS2Query: reliable and scalable MS2 mass spectra-based analogue search}, series = {Nature Communications}, volume = {14}, journal = {Nature Communications}, publisher = {Springer}, issn = {2041-1723}, doi = {10.1038/s41467-023-37446-4}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46105}, pages = {12}, year = {2023}, abstract = {Metabolomics-driven discoveries of biological samples remain hampered by the grand challenge of metabolite annotation and identification. Only few metabolites have an annotated spectrum in spectral libraries; hence, searching only for exact library matches generally returns a few hits. An attractive alternative is searching for so-called analogues as a starting point for structural annotations; analogues are library molecules which are not exact matches but display a high chemical similarity. However, current analogue search implementations are not yet very reliable and relatively slow. Here, we present MS2Query, a machine learning-based tool that integrates mass spectral embedding-based chemical similarity predictors (Spec2Vec and MS2Deepscore) as well as detected precursor masses to rank potential analogues and exact matches. Benchmarking MS2Query on reference mass spectra and experimental case studies demonstrate improved reliability and scalability. Thereby, MS2Query offers exciting opportunities to further increase the annotation rate of metabolomics profiles of complex metabolite mixtures and to discover new biology.}, subject = {Metabolomik}, language = {en} } @article{MuellerBraun2023, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {MTF as a performance indicator for AI algorithms?}, series = {Electronic Imaging: Society for Imaging Science and Technology}, volume = {35}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {16}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2023.35.16.AVM-125}, pages = {1 -- 7}, year = {2023}, abstract = {Abstract The modulation-transfer function (MTF) is a fundamental optical metric to measure the optical quality of an imaging system. In the automotive industry it is used to qualify camera systems for ADAS/AD. Each modern ADAS/AD system includes evaluation algorithms for environment perception and decision making that are based on AI/ML methods and neural networks. The performance of these AI algorithms is measured by established metrics like Average Precision (AP) or precision-recall-curves. In this article we research the robustness of the link between the optical quality metric and the AI performance metric. A series of numerical experiments were performed with object detection and instance segmentation algorithms (cars, pedestrians) evaluated on image databases with varying optical quality. We demonstrate with these that for strong optical aberrations a distinct performance loss is apparent, but that for subtle optical quality differences - as might arise during production tolerances - this link does not exhibit a satisfactory correlation. This calls into question how reliable the current industry practice is where a produced camera is tested end-of-line (EOL) with the MTF, and fixed MTF thresholds are used to qualify the performance of the camera-under-test.}, language = {en} } @phdthesis{Spiegel2024, author = {Spiegel, Thomas}, title = {Multi-criteria flexibility allocation for electric distribution networks}, publisher = {IRC-Library, Information Resource Center der Constructor University}, address = {Bremen}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:579-opus-1011990}, year = {2024}, abstract = {Germany's national climate protection policy, the German Energy Transition, is oriented towards the reduction of energy-related greenhouse gas emissions by rapidly expanding the share of renewable energy systems. New challenges arise regarding technical and energy economical integration as installed wind and photovoltaic power capacities increase continuously. This thesis contributes to the topic by introducing a framework for online multi-criteria flexibility allocation in electrical distribution networks with transport capacity limitations. It considers technical aspects and market participant interests that may contradict each other. Local master data is preprocessed using geospatial information of buildings, photovoltaic systems, wind turbines, and the human population within a spatial domain of interest. By combining weather forecast data, this establishes the foundation for predicting power flow in the electrical distribution network and generating grid-beneficial criteria utilizing the smart grid traff.}, language = {en} } @article{ZanderRuessBogetal.2017, author = {Zander, Nils and Ruess, Martin and Bog, Tino and Kollmannsberger, Stefan and Rank, Ernst}, title = {Multi-level hp -adaptivity for cohesive fracture modeling}, series = {International Journal for Numerical Methods in Engineering}, volume = {109}, journal = {International Journal for Numerical Methods in Engineering}, number = {13}, publisher = {Wiley}, issn = {1097-0207}, doi = {10.1002/nme.5340}, pages = {1723 -- 1755}, year = {2017}, language = {en} } @article{ElhaddadZanderBogetal.2018, author = {Elhaddad, Mohamed and Zander, Nils and Bog, Tino and Kudela, L{\´a}szl{\´o} and Kollmannsberger, Stefan and Kirschke, Jan and Baum, Thomas and Ruess, Martin and Rank, Ernst}, title = {Multi-level hp-finite cell method for embedded interface problems with application in biomechanics}, series = {International Journal for Numerical Methods in Biomedical Engineering}, volume = {34}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, number = {4}, publisher = {Wiley}, issn = {2040-7947}, doi = {10.1002/cnm.2951}, year = {2018}, abstract = {This work presents a numerical discretization technique for solving 3-dimensional material interface problems involving complex geometry without conforming mesh generation. The finite cell method (FCM), which is a high-order fictitious domain approach, is used for the numerical approximation of the solution without a boundary-conforming mesh. Weak discontinuities at material interfaces are resolved by using separate FCM meshes for each material sub-domain and weakly enforcing the interface conditions between the different meshes. Additionally, a recently developed hierarchical hp-refinement scheme is used to locally refine the FCM meshes to resolve singularities and local solution features at the interfaces. Thereby, higher convergence rates are achievable for nonsmooth problems. A series of numerical experiments with 2- and 3-dimensional benchmark problems is presented, showing that the proposed hp-refinement scheme in conjunction with the weak enforcement of the interface conditions leads to a significant improvement of the convergence rates, even in the presence of singularities. Finally, the proposed technique is applied to simulate a vertebra-implant model. The application showcases the method's potential as an accurate simulation tool for biomechanical problems involving complex geometry, and it demonstrates its flexibility in dealing with different types of geometric description.}, language = {en} } @article{BiedermannReichPaschereit2020, author = {Biedermann, Till M. and Reich, M. and Paschereit, C. O.}, title = {Multi-Objective Modeling of Leading-Edge Serrations Applied to Low-Pressure Axial Fans}, series = {Journal of Engineering for Gas Turbines and Power}, volume = {142}, journal = {Journal of Engineering for Gas Turbines and Power}, number = {11}, publisher = {ASME}, doi = {10.1115/1.4048599}, year = {2020}, language = {en} } @inproceedings{GottschaldAdamReich2018, author = {Gottschald, Jonas and Adam, Mario and Reich, Marius}, title = {Multi-Objective Optimization of a District Heating Networks Energy Supply Systems Structure and Dimension}, series = {SDH - 5th International Solar District Heating Conference, 11.-12.04.2018, Graz / Austria}, booktitle = {SDH - 5th International Solar District Heating Conference, 11.-12.04.2018, Graz / Austria}, address = {Graz}, organization = {SDH projects}, year = {2018}, language = {en} } @article{PetrarcaHeninStelmaszczyketal.2011, author = {Petrarca, M. and Henin, S. and Stelmaszczyk, K. and Bock, S. and Kraft, S. and Schramm, U. and Vaneph, C. and Vogel, A. and Kasparian, J. and Sauerbrey, R. and Weber, Konradin and W{\"o}ste, L. and Wolf, J.-P.}, title = {Multijoule scaling of laser-induced condensation in air}, series = {Applied Physics Letters}, volume = {99}, journal = {Applied Physics Letters}, number = {14}, publisher = {AIP Publishing}, issn = {0003-6951}, doi = {10.1063/1.3646397}, year = {2011}, abstract = {Using 100 TW laser pulses, we demonstrate that laser-induced nanometric particle generation in air increases much faster than the beam-averaged incident intensity. This increase is due to a contribution from the photon bath, which adds up with the previously identified one from the filaments and becomes dominant above 550 GW/cm2. It appears related to ozone formation via multiphoton dissociation of the oxygen molecules and demonstrates the critical need for further increasing the laser energy in view of macroscopic effects in laser-induced condensation.}, language = {en} } @inproceedings{FiedlerRillingBogenetal.2015, author = {Fiedler, Jannik and Rilling, Stefan and Bogen, Manfred and Herder, Jens}, title = {Multimodal interaction techniques in scientific data visualization: An analytical survey}, series = {In Proceedings of the 10th International Conference on Computer Graphics Theory and Applications (GRAPP-2015)}, booktitle = {In Proceedings of the 10th International Conference on Computer Graphics Theory and Applications (GRAPP-2015)}, editor = {Braz, Jos{\´e}}, publisher = {SCITEPRESS}, address = {s. l.}, isbn = {978-989-758-087-1}, doi = {10.5220/0005296404310437}, pages = {431 -- 437}, year = {2015}, abstract = {The interpretation process of complex data sets makes the integration of effective interaction techniques crucial. Recent work in the field of human-computer interaction has shown that there is strong evidence that multimodal user interaction, i.e. the integration of various input modalities and interaction techniques into one comprehensive user interface, can improve human performance when interacting with complex data sets. However, it is still unclear which factors make these user interfaces superior to unimodal user interfaces. The contribution of this work is an analytical comparison of a multimodal and a unimodal user interface for a scientific visualization application. We show that multimodal user interaction with simultaneously integrated speech and gesture input improves user performance regarding efficiency and ease of use.}, language = {en} } @inproceedings{SkodaSteffensBeckerSchweitzer2012, author = {Skoda, Sabrina and Steffens, Jochen and Becker-Schweitzer, J{\"o}rg}, title = {Multisensory interaction - A comparative study on driving sound evaluation in moving base and fixed base driving simulators}, series = {Proceedings of the Driving Simulation Conference 2012, CD-ROM}, booktitle = {Proceedings of the Driving Simulation Conference 2012, CD-ROM}, address = {Paris}, year = {2012}, language = {en} } @inproceedings{MoeserReuferGeiger2011, author = {M{\"o}ser, Annika and Reufer, Thomas and Geiger, Christian}, title = {Multitouch and pen interaction for 3D configuration of virtual yachts at trade fairs}, series = {Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology - ACE '11, Lisbon, 08.11.2011 - 11.11.2011}, booktitle = {Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology - ACE '11, Lisbon, 08.11.2011 - 11.11.2011}, editor = {Rom{\~a}o, Teresa and Correia, Nuno and Inami, Masahiko and Kato, Hirokasu and Prada, Rui and Terada, Tsutomu and Dias, Eduardo and Chambel, Teresa}, publisher = {ACM Press}, address = {New York}, isbn = {9781450308274}, doi = {10.1145/2071423.2071514}, pages = {1}, year = {2011}, language = {en} } @inproceedings{MarinosGeigerSchwirtenetal.2010, author = {Marinos, Dionysios and Geiger, Christian and Schwirten, Tobias and G{\"o}bel, Sebastian}, title = {Multitouch navigation in zoomable user interfaces for large diagrams}, series = {ACM International Conference on Interactive Tabletops and Surfaces - ITS '10, 07.11.2010 - 10.11.2010, Saarbr{\"u}cken}, booktitle = {ACM International Conference on Interactive Tabletops and Surfaces - ITS '10, 07.11.2010 - 10.11.2010, Saarbr{\"u}cken}, editor = {Kr{\"u}ger, Antonio and Sch{\"o}ning, Johannes and Wigdor, Daniel and Haller, Michael}, publisher = {ACM Press}, address = {New York}, isbn = {9781450303996}, doi = {10.1145/1936652.1936713}, pages = {275}, year = {2010}, language = {en} } @incollection{SteffensSteeleGuastavino2016, author = {Steffens, Jochen and Steele, Daniel and Guastavino, Catherine}, title = {Music influences the perception of our acoustic and visual environment}, series = {Proceedings of the 45th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2016}, booktitle = {Proceedings of the 45th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2016}, organization = {Institute of Noise Control Engineering}, pages = {7155 -- 7160}, year = {2016}, language = {en} } @article{ElversFischingerSteffens2018, author = {Elvers, Paul and Fischinger, Timo and Steffens, Jochen}, title = {Music listening as self-enhancement}, series = {Psychology of Music}, volume = {10}, journal = {Psychology of Music}, number = {2}, publisher = {Sage}, doi = {10.1177/0305735617707354}, pages = {1 -- 19}, year = {2018}, language = {en} } @masterthesis{Obry2023, type = {Bachelor Thesis}, author = {Obry, Yannick}, title = {Music Streaming Adaption - Drivers of Behavioral Intention}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41326}, school = {Hochschule D{\"u}sseldorf}, pages = {31}, year = {2023}, abstract = {Music consumption and distribution has changed drastically in the last twenty years due to digitalization. Instead of buying music products, like CDs or even downloaded digital music files, today music is predominantly distributed via online music streaming. Therefore, it is mandatory for the music industry as well as researchers to determine which factors are affecting consumers intention to use music streaming services. This study aims to investigate drivers of Behavioral Intention (BI) to use a music streaming service. Particularly, aspects of social preferences in the context of music streaming will be explored. Therefore, a research model is created, based on the Value-based Adoption Model (VAM) (Kim et al., 2007) with an extension to take social factors into account. An online questionnaire with 102 participants was conducted to test the research model and the corresponding hypotheses. In order to evaluate reliable indications, some adjustments needed to be made resulting in a corrected research model. The final independent variables of the corrected model are Perceived Value (PV) (which is composed of Perceived Usefulness (PU) and Perceived Enjoyment (PE)), Perceived Ease of Use (PEU), Perceived Price Value (PPV), Facilitating Conditions (FC), Perceived Fairness (PF), Social Connectivity (SC), and Peer-Effects (PFX). The empirical results show that Perceived Value (PV), Perceived Price Value (PPV), and Perceived Fairness (PF) are determinants of consumers Behavioral Intention (BI) to use a music streaming service.}, language = {en} } @article{BehbehaniSteffens2021, author = {Behbehani, Sami and Steffens, Jochen}, title = {Musical DIAMONDS: The influence of situational classes and characteristics on music listening behavior}, series = {Psychology of Music}, volume = {49}, journal = {Psychology of Music}, number = {6}, publisher = {sage journals}, issn = {1741-3087}, doi = {10.1177/0305735620968910}, pages = {1532 -- 1545}, year = {2021}, language = {en} } @article{AckermannBrinkmannWeinzierl2024, author = {Ackermann, David and Brinkmann, Fabian and Weinzierl, Stefan}, title = {Musical instruments as dynamic sound sources}, series = {Journal of the Acoustical Society of America}, volume = {155}, journal = {Journal of the Acoustical Society of America}, publisher = {Acoustical Society of America}, issn = {1520‑8524}, doi = {10.1121/10.0025463}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58972}, pages = {2302 -- 2313}, year = {2024}, abstract = {Unlike electro-acoustic sound sources, musical instruments have a time-varying, dynamic directivity, due to the note-dependent radiation behavior of the instrument and due to the expressive movements that musicians perform with their instrument. While previous studies have generally examined the directivity of the static, unmoved instrument for specific notes played, we show the individual and combined contributions of these two factors to a temporal modulation of the radiation behavior, based on motion tracking of typical movement patterns for all instruments of a classical symphony orchestra and on the directivity measured for all partials over the entire pitch range of these instruments. The effect of this modulation, which is manifested by changes in timbre and room acoustic excitation, was determined by spectral variations in the free field and under reverberant conditions, as well as by a modulation of room acoustic parameters. Our results show that these effects are well above the just noticeable differences for all musical instruments and all perceptual variables considered. While the effect of motion dominates for brass instruments, string and woodwind instruments exhibit large note-related differences, which should be taken into account in virtual acoustic realities if an auditory liveliness comparable to physical reality is to be achieved.}, language = {en} } @article{AngladaTortSteffensMuellensiefen2019, author = {Anglada-Tort, Manuel and Steffens, Jochen and M{\"u}llensiefen, Daniel}, title = {Names and titles matter: The impact of linguistic fluency and the affect heuristic on aesthetic and value judgements of music}, series = {Psychology of Aesthetics, Creativity, and the Arts}, volume = {13}, journal = {Psychology of Aesthetics, Creativity, and the Arts}, number = {3}, publisher = {APA}, doi = {10.1037/aca0000172}, pages = {277 -- 292}, year = {2019}, language = {en} } @inproceedings{GeigerPaelkeGansen2006, author = {Geiger, Christian and Paelke, Volker and Gansen, Ivonne}, title = {Navigating by Following Stories}, series = {Technologies for Interactive Digital Storytelling and Entertainment, Third International Conference, TIDSE 2006, Darmstadt, Germany, December 4-6, 2006, Proceedings}, booktitle = {Technologies for Interactive Digital Storytelling and Entertainment, Third International Conference, TIDSE 2006, Darmstadt, Germany, December 4-6, 2006, Proceedings}, editor = {Hutchison, David and Kanade, Takeo and Kittler, Josef and Kleinberg, Jon M. and Mattern, Friedemann and Mitchell, John C. and Naor, Moni and Nierstrasz, Oscar and Pandu Rangan, C. and Steffen, Bernhard and Sudan, Madhu and Terzopoulos, Demetri and Tygar, Dough and Vardi, Moshe Y. and Weikum, Gerhard and G{\"o}bel, Stefan and Malkewitz, Rainer and Iurgel, Ido}, publisher = {Springer}, address = {Berlin, Heidelberg}, isbn = {978-3-540-49934-3}, doi = {10.1007/11944577_32}, pages = {324 -- 333}, year = {2006}, language = {en} } @misc{SpindlerMadjlessiRoudi2025, author = {Spindler, Susanne and Madjlessi-Roudi, Sara}, title = {Navigating Repression: Social Space-oriented Social Work with Immigrants during the first Trump Era}, series = {sozialraum.de}, journal = {sozialraum.de}, number = {1}, editor = {Deinet, Ulrich}, publisher = {socialnet}, issn = {1868-2596}, year = {2025}, subject = {Migrationspolitik}, language = {en} } @inproceedings{Musall2011, author = {Musall, Eike}, title = {Near zero energy home, Net zero energy house, Plus energy building-How is it understood and how is it implemented?}, series = {Danfoss Heating Solutions' Technology Management Event, Billund}, booktitle = {Danfoss Heating Solutions' Technology Management Event, Billund}, address = {Billund}, year = {2011}, language = {en} } @incollection{VossMusallSartorietal.2013, author = {Voss, Karsten and Musall, Eike and Sartori, Igor and Lollini, Roberto}, title = {Nearly Zero, Net Zero, and Plus Energy Buildings - Theory, Terminology, Tools, and Examples}, series = {Transition to renewable energy systems}, booktitle = {Transition to renewable energy systems}, editor = {Stolten, Detlef and Scherer, Viktor}, publisher = {Wiley}, address = {Weinheim}, isbn = {978-3-527-33239-7}, doi = {10.1002/9783527673872.ch41}, pages = {875 -- 889}, year = {2013}, language = {en} } @article{AtacSchwiertzJorgensenetal.2023, author = {Ata{\c{c}}, Ilker and Schwiertz, Helge and J{\o}rgensen, Martin Bak and Vandevoordt, Robin and Hinger, Sophie and Spindler, Susanne}, title = {Negotiating Borders through a Politics of Scale: Municipalities and Urban Civil Society Initiatives in the Contested Field of Migration}, series = {Geopolitics}, volume = {29}, journal = {Geopolitics}, number = {2}, publisher = {Informa}, issn = {1465-0045}, doi = {10.1080/14650045.2022.2129732}, pages = {714 -- 740}, year = {2023}, subject = {Migration}, language = {en} } @incollection{Mueller2020, author = {M{\"u}ller, Regine}, title = {Negotiating with social problems. Professionalism in combatting child poverty in Germany}, series = {Social glocalisation and education. social work, health sciences and practical theology perspectives on change}, booktitle = {Social glocalisation and education. social work, health sciences and practical theology perspectives on change}, editor = {Hobelsberger, Hans}, publisher = {Verlag Barbara Budrich}, address = {Leverkusen}, isbn = {978-3-8474-1512-1}, pages = {279 -- 286}, year = {2020}, language = {en} } @incollection{AeleneiMusall2017, author = {Aelenei, Laura and Musall, Eike}, title = {Net ZEB case study buildings, measures and solution sets}, series = {Solution sets for net zero energy buildings}, booktitle = {Solution sets for net zero energy buildings}, editor = {Gardes, Fran{\c{c}}ois and Ayoub, Josef and Aelenei, Daniel and Aelenei, Laura and Scognamiglio, Alessandra}, publisher = {Ernst \& Sohn}, address = {Berlin}, isbn = {9783433604663}, doi = {10.1002/9783433604663.ch3}, pages = {39 -- 102}, year = {2017}, language = {en} } @incollection{AeleneiMusall2017, author = {Aelenei, Laura and Musall, Eike}, title = {Net zero energy building design fundamentals}, series = {Solution sets for net zero energy buildings}, booktitle = {Solution sets for net zero energy buildings}, editor = {Gardes, Fran{\c{c}}ois and Ayoub, Josef and Aelenei, Daniel and Aelenei, Laura and Scognamiglio, Alessandra}, publisher = {Ernst \& Sohn}, address = {Berlin}, isbn = {9783433604663}, doi = {10.1002/9783433604663.ch2}, pages = {7 -- 38}, year = {2017}, language = {en} } @inproceedings{MarszalBourelleMusalletal.2010, author = {Marszal, Anna Joanna and Bourelle, Julien S. and Musall, Eike and Heiselberg, Per and Gustavsen, Arild and Voss, Karsten}, title = {Net Zero Energy Buildings - Calculation Methodologies versus National Building Codes}, series = {EuroSun Conference 2010, Graz, 28.9-30.9.2010}, booktitle = {EuroSun Conference 2010, Graz, 28.9-30.9.2010}, address = {Graz}, year = {2010}, abstract = {The international cooperation project IEA SHC Task 40 / ECBCS Annex 52 "Towards Net Zero Energy Solar Buildings", attempts to develop a common understanding and to set up the basis for an international definition framework of Net Zero Energy Buildings (Net ZEBs). Th e understanding of such buildings and how the Net ZEB status should be calculated differs in most countries. This paper presents an overview of Net ZEBs energy calculation methodologies proposed by organisations representing eight different countries: Austria, Canada, Denmark, Germany, Italy, Norway, Switzerland and the USA. The different parameters used in the calculations are discussed and the various renewable supply options considered in the methodologies are summarised graphically. Thus, the paper helps to understand different existing approaches to calculate energy balance in Net ZEBs, highlights the importance of variables selection and identify possible renewable energy supply options which may be considered in calculations. Finally, the gap between the methodology proposed by each organisation and their respective national building code is assessed; providing an overview of the possible changes building codes will need to undergo in the coming years.}, language = {en} } @inproceedings{Musall2012, author = {Musall, Eike}, title = {Net Zero Energy Buildings - Definition and building concepts}, series = {Net Zero-Energy Buildings Conference, Lissabon}, booktitle = {Net Zero-Energy Buildings Conference, Lissabon}, address = {Lissabon}, year = {2012}, language = {en} } @misc{OPUS4-2014, title = {Net Zero Energy Buildings: International Projects of Carbon Neutrality in Buildings}, volume = {Detail green books}, editor = {Voss, Karsten and Musall, Eike}, publisher = {De Gruyter}, address = {Berlin}, isbn = {3920034805}, year = {2013}, language = {en} } @inproceedings{MusallWeissVossetal.2010, author = {Musall, Eike and Weiß, Tobias and Voss, Karsten and Lenoir, Aur{\´e}lie and Donn, Michael and Cory, Shaan and Garde, Fran{\c{c}}ois}, title = {Net Zero Energy Solar Buildings: An Overview and Analysis on worldwide Building Projects. EuroSun Conference 2010}, address = {Graz}, organization = {EuroSun Conference 2010}, year = {2010}, abstract = {This paper summarises the state of two research phases within the scope of the IEA Task 40 / Annex 52 "Towards Net Zero Energy Solar Buildings" [1]. The first objective is a cross section analysis of a comprehensive collection of more than 280 international zero energy buildings. The aim is to show trends, motives of actors, as well as their method to reach the zero energy balance. Secondly, an in-depth study shows a rough analysis and characteristics of 50 exemplary Nets ZEBs from different countries and climate regions, as well as their combinations of measures concerning energy efficiency and renewable energy supply. It is shown that diverse actors with miscellaneous motives have lead to a lot of different building variations. Typical strategies can be assigned to the typology groups "small residential building", "apartment building" and "non residential building". Net ZEBs are much more energy efficient than average buildings which were built according to national construction and energy regulations. None of the leading Net ZEB examples exist without generation of PV electricity. Trends give an outlook of current and possible future combinations of technologies and passive measures for the realization of (future) net zero energy buildings.}, language = {en} } @article{BernhardtLeeser2017, author = {Bernhardt, Anne-Julchen and Leeser, J{\"o}rg}, title = {NEUBAU: Flexible Self-Build Cities in Germany}, series = {Architectural Design}, volume = {87}, journal = {Architectural Design}, number = {5}, publisher = {Wiley}, doi = {10.1002/ad.2213}, pages = {30 -- 37}, year = {2017}, language = {en} } @article{ZellnerHerrmannWiesenetal.2016, author = {Zellner, R. and Herrmann, H. and Wiesen, P. and Nehr, Sascha}, title = {New and Emerging Technologies of Societal Relevance: Impact on Air Quality and Climate}, series = {Chemie Ingenieur Technik}, volume = {88}, journal = {Chemie Ingenieur Technik}, number = {9}, publisher = {Wiley}, issn = {0009-286X}, doi = {10.1002/cite.201650083}, pages = {1257 -- 1258}, year = {2016}, language = {en} } @phdthesis{Eilert2013, author = {Eilert, Eva}, title = {New applications of heterologous gene expression in Hansenula polymorpha for protein and metabolite production}, publisher = {Institut f{\"u}r Molekulare Mykologie, Institut f{\"u}r Mikrobiologie}, address = {D{\"u}sseldorf}, organization = {Institut f{\"u}r Molekulare Mykologie, Institut f{\"u}r Mikrobiologie}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:061-20130527-092604-7}, year = {2013}, abstract = {The methylotrophic yeast Hansenula polymorpha has been established as a highly efficient expression system. Strong promoters derived from the methanol metabolism pathway and mitotically stable high-copy integration have made this organism very effective for heterologous protein expression. To improve the processing of secretory proteins targeted by the MFα prepro sequence, variations in the amino acid composition near the processing site of Kex2p were investigated (Manuscript I). The insertion of Ala-Pro between MFα prepro sequence and protein of interest leads to an improved processing of the signal sequence in case of interleukin-6 (IL-6) and interferon-α 2a (IFNα-2a). Modeling of the transition sequences confirmed a better exposition of the Kex2p-cleavage site in dependency of Ala-Pro insertions. Analysis of the secreted proteins revealed activity of an Ala-Pro specific endoprotease. Partial removal of the N-terminal Ala-Pro dipeptide was also detected during IFNα-2a processing. The putative protease responsible for the processing of Ala-Pro dipeptides was identified by gene deletion. Significant similarities with Saccharomyces cerevisiae Ste13p were identified. To generally improve productivity in the H. polymorpha system new fusion protein strategies were investigated (Manuscript II). The recombinantly strongly expressed cytosolic ferritin heavy chain (FTH1) was analyzed with regard to its potential as fusion partner for difficult-to-express target proteins. A fragment of the parathyroid hormone (PTH) was chosen to explore whether fusion to FTH1 enhances PTH stability. We could show that the expression level of this fusion protein was at least of the magnitude of that of FTH1 without fusion partner. The solubility of the fusion protein was increased in comparison to FTH1 alone and no degradation of PTH occurred when fused C-terminally to FTH1. Ectoine and 5-hydroxyectoine belong to the family of compatible solutes which are known to contribute to the adaptation of the cell to osmotic stress by mediation of a constant turgor. H. polymorpha was engineered to express the enzymes of the H. elongata 5-hydroxyectoine biosynthesis pathway (Manuscript III). Expression of the enzymes EctB, EctA, EctC and EctD in H. polymorpha resulted in production of 5-hydroxyectoine in gram per liter scale with almost full conversion of ectoine to 5-hydroxyectoine. We showed that 5-hydroxyectoine synthesis was influenced by feeding of methanol during cultivation. Furthermore, 5-hydroxyectoine synthesis was downregulated by the addition of methionine, lysine or threonine indicating the existence of a feedback regulated aspartate kinase in H. polymorpha.}, language = {en} } @article{NehrFranzenReuterKucejko2017, author = {Nehr, Sascha and Franzen-Reuter, Isabelle and Kucejko, Catharina}, title = {New directions: Future approaches to the standardized assessment of airborne pollutants affecting environmental quality}, series = {Atmospheric Environment}, volume = {166}, journal = {Atmospheric Environment}, publisher = {Elsevier}, issn = {1352-2310}, doi = {10.1016/j.atmosenv.2017.06.051}, pages = {570 -- 572}, year = {2017}, language = {en} } @inproceedings{SteffensSteeleGuastavino2015, author = {Steffens, Jochen and Steele, Daniel and Guastavino, Catherine}, title = {New Insights into Soundscape Evaluations Using the Experience Sampling Method}, series = {Proceedings of Euronoise 2015, 31 May - 3 June, Maastricht}, booktitle = {Proceedings of Euronoise 2015, 31 May - 3 June, Maastricht}, address = {Maastricht}, pages = {1495 -- 1500}, year = {2015}, language = {en} } @inproceedings{HuldtgrenKlapperichEndter2022, author = {Huldtgren, Alina and Klapperich, Holger and Endter, Cordula}, title = {Next Steps for User Integration in ICT for Aging Well}, series = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health April 23-25, 2022}, booktitle = {Proceedings of the 8th International Conference on Information and Communication Technologies for Ageing Well and e-Health April 23-25, 2022}, editor = {Ziefle, Martina and Mulvenna, Maurice and Maciaszek, Leszek}, publisher = {SciTePress}, isbn = {978-989-758-566-1}, issn = {2184-4984}, doi = {10.5220/0011072700003188}, pages = {291 -- 298}, year = {2022}, language = {en} } @article{GuoRuess2015, author = {Guo, Yujie and Ruess, Martin}, title = {Nitsche's method for a coupling of isogeometric thin shells and blended shell structures}, series = {Computer Methods in Applied Mechanics and Engineering}, volume = {284}, journal = {Computer Methods in Applied Mechanics and Engineering}, publisher = {Elsevier}, issn = {0045-7825}, doi = {10.1016/j.cma.2014.11.014}, pages = {881 -- 905}, year = {2015}, language = {en} } @inproceedings{SteffensWeinzierl2023, author = {Steffens, Jochen and Weinzierl, Stefan}, title = {Noise for dinner - Towards a comprehensive statistical model of the acoustical and overall quality of restaurants}, series = {Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023, September 11 - 15, 2023,Torino, Italy}, booktitle = {Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023, September 11 - 15, 2023,Torino, Italy}, editor = {Astolfi, Arianna and Asdrubali, Francesco and Shtrepi, Louena}, publisher = {European Acoustics Association}, address = {Turin, Italy}, isbn = {978-88-88942-67-4}, issn = {2221-3767}, doi = {10.61782/fa.2023.0483}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-47908}, pages = {3325 -- 3327}, year = {2023}, abstract = {Studies on noise in restaurants have shown a multitude of potential negative effects, for example related to mood, overall satisfaction, intended revisit, the ability to communicate and the actual behaviour in the room. In this paper, we investigated the complex interplay between room acoustics, soundscape evaluation, non-acoustical aspects of a restaurant visit and overall restaurant quality. Based on acoustical measurements and reports from 142 persons visiting 12 restaurants in Berlin, we propose a structural equation model including both acoustical and non- acoustical factors and yielding a good overall fit. The model, for instance, suggests that the A-weighted sound level negatively impacts the assessment of overall restaurant quality, while the effect of soundscape pleasantness on overall restaurant quality is mediated by the restaurant's perceived atmosphere. Moreover, the reverberation time was found to be effective predominantly through its effect on sound strength, which leads patrons to increasingly raise their speech level to ensure intelligibility. These results thus emphasize the need to design actively the restaurant's acoustical atmosphere beyond pure loudness reduction which involves a specific trade-off between comfort and liveliness, depending on the desired character of the place.}, subject = {European Acoustics Association}, language = {en} } @inproceedings{LaviaWitchelAlettaetal.2018, author = {Lavia, Lisa and Witchel, Harry J. and Aletta, Francesco and Steffens, Jochen and Fiebig, Andr{\´e} and Kang, Jian and Howes, Christine and Healey, Patrick G. T.}, title = {Non-Participant Observation Methods for Soundscape Design and Urban Planning}, series = {Handbook of research on perception-driven approaches to urban assessment and design}, booktitle = {Handbook of research on perception-driven approaches to urban assessment and design}, editor = {Aletta, Francesco and Xiao, Jieling}, publisher = {IGI Global Disseminator of Knowledge}, address = {Hershey, PA}, isbn = {9781522536383}, pages = {73 -- 99}, year = {2018}, language = {en} } @article{YangKollmannsbergerDuesteretal.2011, author = {Yang, Zhengxiong and Kollmannsberger, Stefan and D{\"u}ster, Alexander and Ruess, Martin and Garcia, Eduardo Grande and Burgkart, Rainer and Rank, Ernst}, title = {Non-standard bone simulation: interactive numerical analysis by computational steering}, series = {Computing and Visualization in Science}, volume = {14}, journal = {Computing and Visualization in Science}, number = {5}, publisher = {Springer}, doi = {10.1007/s00791-012-0175-y}, pages = {207 -- 216}, year = {2011}, language = {en} } @article{LiangRuess2016, author = {Liang, Ke and Ruess, Martin}, title = {Nonlinear buckling analysis of the conical and cylindrical shells using the SGL strain based reduced order model and the PHC method}, series = {Aerospace Science and Technology}, volume = {55}, journal = {Aerospace Science and Technology}, publisher = {Elsevier}, issn = {1270-9638}, doi = {10.1016/j.ast.2016.05.018}, pages = {103 -- 110}, year = {2016}, language = {en} } @inproceedings{NabholzCurcicMehneretal.2019, author = {Nabholz, Ulrike and Curcic, Michael and Mehner, Jan E. and Degenfeld-Schonburg, Peter}, title = {Nonlinear Dynamical System Model for Drive Mode Amplitude Instabilities in MEMS Gyroscopes}, series = {2019 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL), Naples, 01-05 April 2019}, booktitle = {2019 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL), Naples, 01-05 April 2019}, publisher = {IEEE}, isbn = {978-1-5386-7828-2}, doi = {10.1109/ISISS.2019.8739703}, year = {2019}, language = {en} } @inproceedings{VersuemerBlaettermannSteffens2025, author = {Vers{\"u}mer, Siegbert and Bl{\"a}ttermann, Patrick and Steffens, Jochen}, title = {Nonlinearities in generalized models based on different soundscape datasets [Abstract]}, series = {DAS|DAGA 2025: 51st Annual Meeting on Acoustics, March 17-20, 2025, Copenhagen}, booktitle = {DAS|DAGA 2025: 51st Annual Meeting on Acoustics, March 17-20, 2025, Copenhagen}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, address = {Berlin}, year = {2025}, subject = {Soundscape}, language = {en} } @inproceedings{Voigt2018, author = {Voigt, Christian}, title = {Not Every Remix is an Innovation}, series = {Proceedings of the 10th ACM Conference on Web Science, 27.05.-30.05.2018, Amsterdam}, booktitle = {Proceedings of the 10th ACM Conference on Web Science, 27.05.-30.05.2018, Amsterdam}, editor = {Akkermans, Hans and Fontaine, Kathy and Vermeulen, Ivar and Houben, Geert-Jan and Weber, Matthew S.}, publisher = {ACM}, address = {New York}, isbn = {9781450355636}, doi = {10.1145/3201064.3201070}, pages = {153 -- 161}, year = {2018}, language = {en} } @article{WolfUlrichBraun2023, author = {Wolf, Dominik Werner and Ulrich, Markus and Braun, Alexander}, title = {Novel developments of refractive power measurement techniques in the automotive world}, series = {Metrologia}, volume = {60}, journal = {Metrologia}, number = {064001}, publisher = {IOP Publishing}, issn = {1681-7575}, doi = {10.1088/1681-7575/acf1a4}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41484}, year = {2023}, abstract = {Refractive power measurements serve as the primary quality standard in the automotive glazing industry. In the light of autonomous driving new optical metrics are becoming more and more popular for specifying optical quality requirements for the windshield. Nevertheless, the link between those quantities and the refractive power needs to be established in order to ensure a holistic requirement profile for the windshield. As a consequence, traceable high-resolution refractive power measurements are still required for the glass quality assessment. Standard measurement systems using Moir{\´e} patterns for refractive power monitoring in the automotive industry are highly resolution limited, wherefore they are insufficient for evaluating the camera window area. Consequently, there is a need for more sophisticated refractive power measurement systems that provide a higher spatial resolution. In addition, a calibration procedure has to be developed in order to guarantee for comparability of the measurement results. For increasing the resolution, a measurement setup based on an auto-correlation algorithm is tested in this paper. Furthermore, a calibration procedure is established by using a single reference lens with a nominal refractive power of 100 km-1. For the calibration of the entire measurement range of the system, the lens is tilted by an inclination angle orthogonal to the optical axis. The effective refractive power is then given by the Kerkhof model. By adopting the measurement and calibration procedure presented in this paper, glass suppliers in the automotive industry will be able to detect relevant manufacturing defects within the camera window area more accurately paving the way for a holistic quality assurance of the windshield for future advanced driver-assistance system (ADAS) functionalities. Concurrently, the traceability of the measurement results is ensured by establishing a calibration chain based on a single reference lens, which is traced back to international standards.}, language = {en} } @misc{Deckert2023, author = {Deckert, Carsten}, title = {Now What You Hear Is Not a Test: The Invention and Commercialization of Rap Music}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, doi = {10.20385/opus4-4113}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41134}, pages = {14}, year = {2023}, language = {en} } @inproceedings{Musall2011, author = {Musall, Eike}, title = {Null-/Plusenergiegeb{\"a}ude - Erfahrungen und Perspektiven zu klimaneutralen Geb{\"a}uden in Deutschland}, series = {1. Internationaler Plusenergie-Kongress, Bern}, booktitle = {1. Internationaler Plusenergie-Kongress, Bern}, address = {Bern}, year = {2011}, language = {en} } @article{IqbalPfeiffelmannBenimetal.2018, author = {Iqbal, Sohail and Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of lifted hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001014}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27950}, year = {2018}, language = {en} } @article{PfeiffelmannBenimJoos2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of liquid jet impingement cooling of a thermoelectric generator}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001032}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27988}, year = {2018}, language = {en} } @inproceedings{YalcınkayaDurmazTepeetal.2024, author = {Yal{\c{c}}{\i}nkaya, Orhan and Durmaz, Ufuk and Tepe, Ahmet {\"U}mit and Benim, Ali Cemal and Uysal, {\"U}nal}, title = {Numerical Analysis of Roughened Target Surface for Enhancing Jet Impingement Cooling}, series = {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, D{\"u}sseldorf, Germany}, volume = {1}, booktitle = {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, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031672408}, issn = {2195-4356}, doi = {10.1007/978-3-031-67241-5_64}, pages = {713 -- 720}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BenimIqbalJoosetal.2016, author = {Benim, Ali Cemal and Iqbal, Sohail and Joos, Franz and Wiedermann, Alexander}, title = {Numerical Analysis of Turbulent Combustion in a Model Swirl Gas Turbine Combustor}, series = {Journal of Combustion}, volume = {2016}, journal = {Journal of Combustion}, publisher = {Hindawi}, issn = {2090-1968}, doi = {10.1155/2016/2572035}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-28044}, pages = {1 -- 12}, year = {2016}, language = {en} } @article{Benim2021, author = {Benim, Ali Cemal}, title = {Numerical Calculation of Sink Velocities for Helminth Eggs in Water}, series = {Computation}, volume = {9}, journal = {Computation}, number = {12}, publisher = {MDPI}, issn = {2079-3197}, doi = {10.3390/computation9120136}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-37318}, year = {2021}, abstract = {The settling velocities of helminth eggs of three types, namely Ascaris suum (ASC), Trichuris suis (TRI), and Oesophagostomum spp. (OES), in clean tap water are computationally determined by means of computational fluid dynamics, using the general-purpose CFD software ANSYS Fluent 18.0. The previous measurements of other authors are taken as the basis for the problem formulation and validation, whereby the latter is performed by comparing the predicted sink velocities with those measured in an Owen tube. To enable a computational treatment, the measured shapes of the eggs are parametrized by idealizing them in terms of elementary geometric forms. As the egg shapes show a variation within each class, "mean" shapes are considered. The sink velocities are obtained through the computationally obtained drag coefficients. The latter are defined by means of steady-state calculations. Predicted sink velocities are compared with the measured ones. It is observed that the calculated values show a better agreement with the measurements, for ASC and TRI, compared to the theoretical sink values delivered by the Stokes theory. However, the observed agreement is still found not to be very satisfactory, indicating the role of further parameters, such as the uncertainties in the characterization of egg shapes or flocculation effects even in clean tap water.}, language = {en} } @article{TaymazAslanBenim2015, author = {Taymaz, Imdat and Aslan, Erman and Benim, Ali Cemal}, title = {Numerical investigation of incompressible fluid flow and heat transfer across a bluff body in a channel flow}, series = {Thermal Science}, volume = {19}, journal = {Thermal Science}, number = {2}, publisher = {doiSerbia}, doi = {10.2298/tsci120220145t}, pages = {537 -- 547}, year = {2015}, language = {en} } @article{KimSchnellScheffknechtetal.2007, author = {Kim, Ju Pyo and Schnell, Uwe and Scheffknecht, G{\"u}nter and Benim, Ali Cemal}, title = {Numerical modelling of MILD combustion for coal}, series = {Progress in Computational Fluid Dynamics}, volume = {7}, journal = {Progress in Computational Fluid Dynamics}, number = {6}, publisher = {Inderscience Publishers}, issn = {1468-4349}, doi = {10.1504/PCFD.2007.014683}, year = {2007}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @inproceedings{SaeedrashedSachdevaSinghetal.2024, author = {Saeedrashed, Younis and Sachdeva, Aryaman and Singh, Srijna and Benim, Ali Cemal}, title = {Numerical Simulation of Cavitation Characteristics on Stepped Spillway Due to Different Geometry Configuration}, series = {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, D{\"u}sseldorf, Germany}, volume = {2}, booktitle = {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, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031666087}, issn = {2195-4356}, doi = {10.1007/978-3-031-66609-4_66}, pages = {715 -- 725}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BaşaranBenimYurddas2021, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal and Yurddas, Ali}, title = {Numerical Simulation of the Condensation Flow of the Isobutane (R600a) inside Microchannel}, series = {Heat Transfer Engineering}, volume = {43}, journal = {Heat Transfer Engineering}, number = {3-5}, publisher = {Taylor \& Francis}, issn = {0145-7632}, doi = {10.1080/01457632.2021.1874668}, pages = {337 -- 361}, year = {2021}, language = {en} } @article{ShahzadGulistanAlietal.2020, author = {Shahzad, Azeem and Gulistan, Uzma and Ali, Ramzan and Iqbal, Azhar and Benim, Ali Cemal and Kamran, Muhammad and Khan, Salah Ud-Din and Khan, Shahab Ud-Din and Farooq, Aamir}, title = {Numerical Study of Axisymmetric Flow and Heat Transfer in a Liquid Film over an Unsteady Radially Stretching Surface}, series = {Mathematical Problems in Engineering}, volume = {2020}, journal = {Mathematical Problems in Engineering}, publisher = {Hindawi}, doi = {10.1155/2020/6737243}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27755}, pages = {1 -- 9}, year = {2020}, language = {en} } @incollection{CanalBenim2025, author = {Canal, Cansu Deniz and Benim, Ali Cemal}, title = {Numerical Study of Co-Firing in Swirl Burner Using Coal-Biomass Blends}, series = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, volume = {Springer Proceedings in Mathematics \& Statistics, Bd. 487}, booktitle = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, editor = {Sharma, Rajesh Kumar and Srivastava, Shailesh Kumar and Benim, Ali Cemal}, publisher = {Springer Nature}, address = {Singapore}, isbn = {9789819625789}, issn = {2194-1009}, doi = {10.1007/978-981-96-2579-6_3}, pages = {21 -- 32}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{PfeiffelmannBenim2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal}, title = {Numerical study of the quenching of a laminar premixed hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001031}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27976}, year = {2018}, language = {en} } @article{LuRohrerHollandetal.2012, author = {Lu, K. D. and Rohrer, F. and Holland, F. and Fuchs, H. and Bohn, Birger and Brauers, Theo and Chang, C. C. and H{\"a}seler, R. and Hu, M. and Kita, K. and Kondo, Y. and Li, X. and Lou, S. R. and Nehr, Sascha and Shao, M. and Zeng, L. M. and Wahner, A. and Zhang, Y. H. and Hofzumahaus, A.}, title = {Observation and modelling of OH and HO2 concentrations in the Pearl River Delta 2006: a missing OH source in a VOC rich atmosphere}, series = {Atmospheric Chemistry and Physics}, volume = {12}, journal = {Atmospheric Chemistry and Physics}, number = {3}, publisher = {Copernicus}, issn = {1680-7324}, doi = {10.5194/acp-12-1541-2012}, pages = {1541 -- 1569}, year = {2012}, abstract = {Abstract. Ambient OH and HO2 concentrations were measured by laser induced fluorescence (LIF) during the PRIDE-PRD2006 (Program of Regional Integrated Experiments of Air Quality over the Pearl River Delta, 2006) campaign at a rural site downwind of the megacity of Guangzhou in Southern China. The observed OH concentrations reached daily peak values of (15-26) × 106 cm-3 which are among the highest values so far reported for urban and suburban areas. The observed OH shows a consistent high correlation with j(O1D) over a broad range of NOx conditions. The correlation cannot be reproduced by model simulations, indicating that OH stabilizing processes are missing in current models. The observed OH exhibited a weak dependence on NOx in contrast to model predictions. While modelled and measured OH agree well at NO mixing ratios above 1 ppb, a continuously increasing underprediction of the observed OH is found towards lower NO concentrations, reaching a factor of 8 at 0.02 ppb NO. A dependence of the modelled-to-measured OH ratio on isoprene cannot be concluded from the PRD data. However, the magnitude of the ratio fits into the isoprene dependent trend that was reported from other campaigns in forested regions. Hofzumahaus et al. (2009) proposed an unknown OH recycling process without NO, in order to explain the high OH levels at PRD in the presence of high VOC reactivity and low NO. Taking a recently discovered interference in the LIF measurement of HO2 into account, the need for an additional HO2 → OH recycling process persists, but the required source strength may be up to 20\% larger than previously determined. Recently postulated isoprene mechanisms by Lelieveld et al. (2008) and Peeters and M{\"u}ller (2010) lead to significant enhancements of OH expected for PRD, but an underprediction of the observed OH by a factor of two remains at low NO (0.1-0.2 ppb). If the photolysis of hydroperoxy aldehydes from isoprene is as efficient as proposed by Peeters and M{\"u}ller (2010), the corresponding OH formation at PRD would be more important than the primary OH production from ozone and HONO. While the new isoprene mechanisms need to be confirmed by laboratory experiments, there is probably need for other, so far unidentified chemical processes to explain entirely the high OH levels observed in Southern China.}, language = {en} } @inproceedings{WeberHewelingFischeretal.2017, author = {Weber, Konradin and Heweling, Georg and Fischer, Christian and Lange, Martin and B{\"o}hlke, Christoph}, title = {Octocopter investigation of the vertical and horizontal variation of ultrafine particles, fine particulate matter and soot in the traffic plume emitted from a Rhine river bridge in Duesseldorf, Germany}, series = {Geophysical Research Abstracts: EGU General Assembly 2017}, volume = {19}, booktitle = {Geophysical Research Abstracts: EGU General Assembly 2017}, publisher = {Copernicus}, address = {G{\"o}ttingen}, year = {2017}, abstract = {For this study an octocopter UAV was used for carrying an ultrafine (UFP) particle monitor, an optical particle counter (OPC) and a micro aethalometer. The UFP-monitor, based on electrical charging of UFPs, was able to count the number of UFPs and give an estimated mean diameter of the measured particles. The OPC, based on the particle induced light scattering of a laser beam, was able to detect aerosols in a size range of about 250 nm to 32 μm in 31 bins. The micro aethalometer measured the soot by optical attenuation of a light beam which is caused by carbon particulate matter. The octocopter with a lift off weight by 10.5 kg was especially designed and constructed at the University of Applied Sciences, Duesseldorf, for the measurement of air pollutants. It was equipped with eight 900 W electric engines and a pixhawk flight control. Technically this octocopter was able to climb up to altitudes of up to 2 km AGL. However, during this study an altitude range of several 10 meters was used. During this study about 60 octocopter flights were performed. The flights clearly revealed a plume of UFPs coming from the traffic on the bridge. This result was confirmed by various upwind and downwind measurements with the octocopter in the region of the bridge.}, subject = {Messtechnik}, language = {en} } @inproceedings{RakowFaeskornWoykeSaatzetal.2022, author = {Rakow, Thomas C. and Faeskorn-Woyke, Heide and Saatz, Inga Marina and Knolle, Harm}, title = {OER Tools and Courses for Teaching Database Systems as Developed in the Project EILD.nrw}, series = {LWDA'22: Lernen, Wissen, Daten, Analysen. October 05-07, 2022, Hildesheim, Germany}, volume = {CEUR Workshop Proceedings: 3341}, booktitle = {LWDA'22: Lernen, Wissen, Daten, Analysen. October 05-07, 2022, Hildesheim, Germany}, editor = {Reuss, Pascal and Eisenstadt, Viktor and Sch{\"o}nborn, Jakob and Sch{\"a}fer, Jero}, publisher = {CEUR-WS}, address = {Aachen}, issn = {1613-0073}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-40622}, year = {2022}, abstract = {In the EILD.nrw project, Open Educational Resources (OER) are being developed for teaching databases. Instructors can use the tools and courses in a variety of learning scenarios. Students of computer science and application subjects learn the complete life cycle of databases. For this purpose, quizzes, interactive tools, instructional videos, and courses for learning management systems are developed and published under a Creative Commons license.}, language = {en} } @article{Gerhards2023, author = {Gerhards, Claudia}, title = {Of tubes and telegrams: The names of social media platforms and messenger services}, series = {Convergence: The International Journal of Research into New Media Technologies}, volume = {0}, journal = {Convergence: The International Journal of Research into New Media Technologies}, number = {0}, publisher = {Sage}, issn = {1748-7382}, doi = {10.1177/13548565231174591}, pages = {1 -- 25}, year = {2023}, language = {en} } @article{FuchsAcirBohnetal.2014, author = {Fuchs, H. and Acir, Ismail-Hakki and Bohn, Birger and Brauers, Theo and Dorn, Hans-Peter and H{\"a}seler, R. and Hofzumahaus, A. and Holland, F. and Kaminski, M. and Li, X. and Lu, K. and Lutz, A. and Nehr, Sascha and Rohrer, F. and Tillmann, R. and Wegener, R. and Wahner, A.}, title = {OH regeneration from methacrolein oxidation investigated in the atmosphere simulation chamber SAPHIR}, series = {Atmospheric Chemistry and Physics}, volume = {14}, journal = {Atmospheric Chemistry and Physics}, number = {15}, publisher = {Copernicus}, issn = {1680-7324}, doi = {10.5194/acp-14-7895-2014}, pages = {7895 -- 7908}, year = {2014}, abstract = {Abstract. Hydroxyl radicals (OH) are the most important reagent for the oxidation of trace gases in the atmosphere. OH concentrations measured during recent field campaigns in isoprene-rich environments were unexpectedly large. A number of studies showed that unimolecular reactions of organic peroxy radicals (RO2) formed in the initial reaction step of isoprene with OH play an important role for the OH budget in the atmosphere at low mixing ratios of nitrogen monoxide (NO) of less than 100 pptv. It has also been suggested that similar reactions potentially play an important role for RO2 from other compounds. Here, we investigate the oxidation of methacrolein (MACR), one major oxidation product of isoprene, by OH in experiments in the simulation chamber SAPHIR under controlled atmospheric conditions. The experiments show that measured OH concentrations are approximately 50\% larger than calculated by the Master Chemical Mechanism (MCM) for conditions of the experiments (NO mixing ratio of 90 pptv). The analysis of the OH budget reveals an OH source that is not accounted for in MCM, which is correlated with the production rate of RO2 radicals from MACR. In order to balance the measured OH destruction rate, 0.77 OH radicals (1σ error: ± 0.31) need to be additionally reformed from each reaction of OH with MACR. The strong correlation of the missing OH source with the production of RO2 radicals is consistent with the concept of OH formation from unimolecular isomerization and decomposition reactions of RO2. The comparison of observations with model calculations gives a lower limit of 0.03 s-1 for the reaction rate constant if the OH source is attributed to an isomerization reaction of MACR-1-OH-2-OO and MACR-2-OH-2-OO formed in the MACR + OH reaction as suggested in the literature (Crounse et al., 2012). This fast isomerization reaction would be a competitor to the reaction of this RO2 species with a minimum of 150 pptv NO. The isomerization reaction would be the dominant reaction pathway for this specific RO2 radical in forested regions, where NO mixing ratios are typically much smaller.}, language = {en} } @article{AckermannFiedlerBrinkmannetal.2020, author = {Ackermann, David and Fiedler, Felicitas and Brinkmann, Fabian and Schneider, Martin and Weinzierl, Stefan}, title = {On the Acoustic Qualities of Dynamic Pseudo-Binaural Recordings}, series = {Journal of the Audio Engineering Society}, volume = {68}, journal = {Journal of the Audio Engineering Society}, number = {6}, publisher = {Audio-Engineering Society}, issn = {0004-7554}, doi = {10.17743/jaes.2020.0036}, pages = {418 -- 427}, year = {2020}, abstract = {The motion-tracked binaural (MTB) technique allows the dynamic, pseudobinaural rendering of spatial sound scenes recorded by a circular array of microphones on a rigid sphere. The system provides a multichannel live audio transmission from which a head-related signal with approximated interaural time and level differences can be derived and played via headphones, head tracking, and a corresponding rendering software. The latter is mainly calculating imperceptible interpolation between channel pairs during head movements. This contribution evaluates the potential of this format for the creation of virtual acoustic envi- ronments. Based on the technical realization of a 16-channel MTB array with omnidirectional diffuse field-corrected electret condenser microphone capsules, the plausibility of 8 and 16-channel recordings was tested against a physical sound source. Furthermore, the sound quality of the pseudobinaural rendering was assessed based on different items of the Spatial Audio Quality Inventory (SAQI) compared to a true dynamic binaural reference. The results show that the overall plausibility of the MTB signal with optimal interpolation is close to the reference. Even if there are small differences with respect to tone color and spatial sound source attributes, the degree of externalization and even the perceived source elevation were, despite the absence of pinna cues, well comparable to the true binaural reference.}, language = {en} } @article{Virchow2020, author = {Virchow, Fabian}, title = {On the complexity of emotions in social discourse and political action: a reply to Leser and Spissinger}, series = {Global Discourse}, volume = {10}, journal = {Global Discourse}, number = {2}, publisher = {Ingenta}, doi = {10.1332/204378920x15862771406251}, pages = {343 -- 346}, year = {2020}, language = {en} } @inproceedings{Franz2008, author = {Franz, Thomas}, title = {On the Evaluation of Personal Knowledge Management Solutions: Evaluating Tools of the X-COSIM Semantic Desktop}, series = {LWA 2008 - Workshop-Woche: Lernen, Wissen \& Adaptivit{\"a}t, W{\"u}rzburg, 6.-8. Oktober 2008, Proceedings}, booktitle = {LWA 2008 - Workshop-Woche: Lernen, Wissen \& Adaptivit{\"a}t, W{\"u}rzburg, 6.-8. Oktober 2008, Proceedings}, address = {W{\"u}rzburg}, pages = {15 -- 22}, year = {2008}, language = {en} } @inproceedings{FatemiTischbeinWirtzetal.2023, author = {Fatemi, Armin and Tischbein, Franziska and Wirtz, Frank and Schmoger, Christin and Dorendorf, Stefan and Schurtz, Annika and Echternacht, David and Ulbig, Andreas}, title = {On the Impact of Smartification Strategies for the State Estimation of Low Voltage Grids}, series = {13th "Internationale Energiewirtschaftstagung" (IEWT2023), February 15-17, 2023, Vienna, Austria}, booktitle = {13th "Internationale Energiewirtschaftstagung" (IEWT2023), February 15-17, 2023, Vienna, Austria}, publisher = {arXiv}, address = {Wien}, doi = {10.48550/arXiv.2303.07964}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41282}, pages = {1 -- 15}, year = {2023}, abstract = {The decarbonization of for example the energy or heat sector leads to the transformation of distribution grids. The expansion of decentralized energy resources and the integration of new consumers due to sector coupling (e.g. heat pumps or electric vehicles) into low voltage grids increases the need for grid expansion and usage of flexibilities in the grid. A high observability of the current grid status is needed to perform these tasks efficiently and effectively. Therefore, there is a need to increase the observability of low voltage grids by installing measurement technologies (e.g. smart meters). Multiple different measurement technologies are available for low voltage grids which can vary in their benefit to observation quality and their installation costs. Therefore, Bayernwerk Netz GmbH and E.DIS AG in cooperation with E-Bridge Consulting GmbH and the Institute for High Voltage Equipment and Grids, Digitalization and Energy Economics (IAEW) investigated the effectiveness of different strategies for the smartification of low voltage grids. This paper presents the methodology used for the investigation and exemplary results focusing on the impact of intelligent cable distribution cabinets and smart meters on the quality of the state estimation.}, language = {en} } @article{KeshavanarayanaRuessdeBorst2018, author = {Keshavanarayana, Pradeep and Ruess, Martin and de Borst, Ren{\´e}}, title = {On the monolithic and staggered solution of cell contractility and focal adhesion growth}, series = {International Journal for Numerical Methods in Biomedical Engineering}, volume = {34}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, number = {11}, publisher = {Wiley}, issn = {2040-7947}, doi = {10.1002/cnm.3138}, year = {2018}, language = {en} } @article{AckermannBoehmWeinzierl2017, author = {Ackermann, David and B{\"o}hm, Christoph and Weinzierl, Stefan}, title = {On the numerical simulation of natural acoustic sound sources [Meeting Abstract]}, series = {The Journal of the Acoustical Society of America}, volume = {141}, journal = {The Journal of the Acoustical Society of America}, number = {5_Supplement}, issn = {0001-4966}, doi = {10.1121/1.4989163}, pages = {3997 -- 3997}, year = {2017}, abstract = {A convincing auralization of acoustical scenes does not only require a proper modeling of the sound propagation between source and receiver, but also an appropriate representation of the acoustical source itself. While the properties of electro-acoustic sources can be well represented by advanced loudspeaker formats with high resolution, the complex, time-variant behavior of natural acoustic sources such as speakers, singers or musical instruments is not in any way considered by current techniques for acoustical simulation and auralization. In the talk, we will present measurement results of the sound power and directivity of natural acoustic sound sources and their dependence on pitch and dynamic level, as well as measurements of typical movements of the source during musical performances. We will demonstrate the physical and perceptual relevance of these effects both in the direct field and in room acoustical environments based on a technical and perceptual evaluation, and discuss new approaches to include these effects in numerical simulations.}, language = {en} } @article{Deckert2016, author = {Deckert, Carsten}, title = {On the Originality-Effectiveness Duality of Creativity: Tensions Concerning the Components of Creativity}, series = {Business Creativity and the Creative Economy}, volume = {2}, journal = {Business Creativity and the Creative Economy}, number = {1}, doi = {10.18536/bcce.2016.10.2.1.07}, pages = {70 -- 82}, year = {2016}, abstract = {The standard definition of individual creativity is based on a tension between originality on the one side and effectiveness (usefulness and appropriateness) on the other side. In this article this tension is called the originality-effectiveness duality of creativity. The article explores how this duality pervades the componential theories of creativity. To analyze the components of creativity with regard to their tensions, the so called value square ("Wertequadrat") developed by Helwig (1967) and Schulz von Thun (1998) is used. The value square explains each component as a dynamic equilibrium and shows how a positive value is balanced with its positive countervalue. Tensions of mindfulness, precision and ambiguity, as well as immersion and detachment are identified permeating the components of creativity. This article explores the implications these tensions have for creativity research and for businesses in a creative economy.}, language = {en} } @article{Manthe2021, author = {Manthe, Barbara}, title = {On the Pathway to Violence: West German Right-Wing Terrorism in the 1970s}, series = {Terrorism and Political Violence}, volume = {33}, journal = {Terrorism and Political Violence}, number = {1}, publisher = {Taylor \& Francis}, issn = {0954-6553}, doi = {10.1080/09546553.2018.1520701}, pages = {49 -- 70}, year = {2021}, language = {en} } @article{Manthe2021, author = {Manthe, Barbara}, title = {On the Pathway to Violence: West German Right-Wing Terrorism in the 1970s}, series = {Terrorism and Political Violence}, volume = {33}, journal = {Terrorism and Political Violence}, number = {1}, publisher = {Taylor \& Francis}, issn = {0954-6553}, doi = {10.1080/09546553.2018.1520701}, pages = {49 -- 70}, year = {2021}, language = {en} } @article{KaluzaMuhler2009, author = {Kaluza, Stefan and Muhler, Martin}, title = {On the precipitation mechanism and the role of the post-precipitation steps during the synthesis of binary ZnO-Al2O3 composites with high specific surface area}, series = {Journal of Materials Chemistry}, volume = {19}, journal = {Journal of Materials Chemistry}, number = {23}, publisher = {Royal Society of Chemistry (RSC)}, issn = {1364-5501}, doi = {10.1039/b902004g}, pages = {3914 -- 3922}, year = {2009}, language = {en} } @article{KaluzaMuhler2009, author = {Kaluza, Stefan and Muhler, Martin}, title = {On the Role of Aging, Washing, and Drying in the Synthesis of Polycrystalline Zinc Oxide by Precipitation: Combining Fast Continuous Mixing, Spray Drying and Freeze Drying to Unravel the Solid-State Transformations of the Precipitate}, series = {Catalysis Letters}, volume = {129}, journal = {Catalysis Letters}, number = {3-4}, publisher = {Springer}, doi = {10.1007/s10562-008-9818-5}, pages = {287 -- 292}, year = {2009}, language = {en} } @article{NebelSchmidtPanetal.2019, author = {Nebel, Janine and Schmidt, Stefan and Pan, Qiushi and Lotz, Katrin and Kaluza, Stefan and Muhler, Martin}, title = {On the role of cobalt carbidization in higher alcohol synthesis over hydrotalcite-based Co-Cu catalysts}, series = {Chinese Journal of Catalysis}, volume = {40}, journal = {Chinese Journal of Catalysis}, number = {11}, publisher = {Elsevier}, issn = {1872-2067}, doi = {10.1016/S1872-2067(19)63344-9}, pages = {1731 -- 1740}, year = {2019}, language = {en} } @inproceedings{FriedrichLyssakowPearceetal.2016, author = {Friedrich, Linus and Lyssakow, Pawel and Pearce, Garth and Ruess, Martin and Bisagni, Chiara and Schr{\"o}der, Kai-Uwe}, title = {ON THE STRUCTURAL DESIGN OF IMPERFECTION SENSITIVE LAMINATED COMPOSITE SHELL STRUCTURES SUBJECTED TO AXIAL COMPRESSION}, series = {Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 05.06.2016 - 10.06.2016, Crete Island}, booktitle = {Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 05.06.2016 - 10.06.2016, Crete Island}, editor = {Papadrakakis, Manolis and Papadopoulos, V. and Stefanou, G. and Plevris, V.}, publisher = {Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece}, address = {Athens}, isbn = {978-618-82844-0-1}, doi = {10.7712/100016.1951.5838}, pages = {2182 -- 2189}, year = {2016}, language = {en} } @article{RichterSteenmannSchellscheidtetal.2019, author = {Richter, Jessica and Steenmann, Anna and Schellscheidt, Benjamin and Licht, Thomas}, title = {On-Chip Diffusion Bonding creates Stable Interconnections Usable at Temperatures over 300°C}, series = {International Symposium on Microelectronics}, volume = {2019}, journal = {International Symposium on Microelectronics}, number = {1}, publisher = {IMAPS}, organization = {IMAPS}, doi = {10.4071/2380-4505-2019.1.000530}, pages = {000530 -- 000534}, year = {2019}, language = {en} } @article{HautmannHoijtinkEichelbergeretal.2009, author = {Hautmann, Christopher and Hoijtink, Herbert and Eichelberger, Ilka and Hanisch, Charlotte and Pl{\"u}ck, Julia and Walter, Daniel and D{\"o}pfner, Manfred}, title = {One-year follow-up of a parent management training for children with externalizing behaviour problems in the real world}, series = {Behavioural and cognitive psychotherapy}, volume = {37}, journal = {Behavioural and cognitive psychotherapy}, number = {4}, publisher = {Cambridge University Press}, doi = {10.1017/s135246580999021x}, pages = {379 -- 396}, year = {2009}, language = {en} } @inproceedings{VoigtSwatman2006, author = {Voigt, Christian and Swatman, Paula}, title = {Online Case Discussions: Tensions in Activity Systems}, series = {Sixth IEEE International Conference on Advanced Learning Technologies (ICALT'06), 05-07 July 2006, Kerkrade, The Netherlands}, booktitle = {Sixth IEEE International Conference on Advanced Learning Technologies (ICALT'06), 05-07 July 2006, Kerkrade, The Netherlands}, publisher = {IEEE}, isbn = {0-7695-2632-2}, doi = {10.1109/icalt.2006.1652550}, pages = {748 -- 750}, year = {2006}, language = {en} } @inproceedings{BeckersEickerFassbenderetal.2012, author = {Beckers, Kristian and Eicker, Stefan and Faßbender, Stephan and Heisel, Maritta and Schmidt, Holger and Schwittek, Widura}, title = {Ontology-Based Identification of Research Gaps and Immature Research Areas}, series = {Multidisciplinary Research and Practice for Information Systems: IFIP WG 8.4, 8.9/TC 5 International Cross-Domain Conference and Workshop on Availability, Reliability, and Security, CD-ARES 2012, Prague, Czech Republic, August 20-24, 2012. Proceedings}, volume = {LNCS, 7465}, booktitle = {Multidisciplinary Research and Practice for Information Systems: IFIP WG 8.4, 8.9/TC 5 International Cross-Domain Conference and Workshop on Availability, Reliability, and Security, CD-ARES 2012, Prague, Czech Republic, August 20-24, 2012. Proceedings}, editor = {Quirchmayr, Gerald and Basl, Josef and You, Ilsun and Xu, Lida and Weippl, Edgar}, publisher = {Springer}, address = {Berlin, Heidelberg}, isbn = {978-3-642-32497-0}, issn = {1611-3349}, doi = {10.1007/978-3-642-32498-7_1}, pages = {1 -- 16}, year = {2012}, language = {en} } @inproceedings{WeberWeidemannvanHarenetal.1995, author = {Weber, Konradin and Weidemann, Johannes and van Haren, Guenther and Lamp, Torsten}, title = {Open-path FTIR measurements at an urban area in Germany}, series = {SPIE Proceedings, Optical Sensing for Environmental and Process Monitoring}, volume = {2365}, booktitle = {SPIE Proceedings, Optical Sensing for Environmental and Process Monitoring}, editor = {Simpson, Orman A.}, publisher = {SPIE}, issn = {0277-786X}, doi = {10.1117/12.210818}, pages = {37 -- 46}, year = {1995}, subject = {FT-IR-Spektroskopie}, language = {en} } @inproceedings{TiatorHuhnGeigeretal.2022, author = {Tiator, Marcel and Huhn, Calvin and Geiger, Christian and Grimm, Paul}, title = {OpenXtract: A Blender Add-On for the Accelerated Extraction of the Objects of Interest}, series = {2022 IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR)}, booktitle = {2022 IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR)}, publisher = {IEEE}, doi = {10.1109/AIVR56993.2022.00020}, pages = {99 -- 103}, year = {2022}, subject = {Geometrische Modellierung}, language = {en} } @unpublished{WolfBraunUlrich2024, author = {Wolf, Dominik Werner and Braun, Alexander and Ulrich, Markus}, title = {Optical aberrations in autonomous driving: Physics-informed parameterized temperature scaling for neural network uncertainty calibration}, series = {International Journal of Computer Vision (IJCV)}, journal = {International Journal of Computer Vision (IJCV)}, publisher = {arXiv}, doi = {10.48550/arXiv.2412.13695}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-50120}, year = {2024}, abstract = {'A trustworthy representation of uncertainty is desirable and should be considered as a key feature of any machine learning method' (Huellermeier and Waegeman, 2021). This conclusion of Huellermeier et al. underpins the importance of calibrated uncertainties. Since AI-based algorithms are heavily impacted by dataset shifts, the automotive industry needs to safeguard its system against all possible contingencies. One important but often neglected dataset shift is caused by optical aberrations induced by the windshield. For the verification of the perception system performance, requirements on the AI performance need to be translated into optical metrics by a bijective mapping (Braun, 2023). Given this bijective mapping it is evident that the optical system characteristics add additional information about the magnitude of the dataset shift. As a consequence, we propose to incorporate a physical inductive bias into the neural network calibration architecture to enhance the robustness and the trustworthiness of the AI target application, which we demonstrate by using a semantic segmentation task as an example. By utilizing the Zernike coefficient vector of the optical system as a physical prior we can significantly reduce the mean expected calibration error in case of optical aberrations. As a result, we pave the way for a trustworthy uncertainty representation and for a holistic verification strategy of the perception chain.}, language = {en} } @inproceedings{MuellerLehmannBraun2019, author = {M{\"u}ller, Patrick and Lehmann, Matthias and Braun, Alexander}, title = {Optical quality metrics for image restoration}, series = {Digital Optical Technologies 2019}, volume = {Proceedings, Vol. 11062}, booktitle = {Digital Optical Technologies 2019}, editor = {Kress, Bernard C. and Schelkens, Peter}, address = {Munich}, organization = {International Society for Optics and Photonics}, doi = {10.1117/12.2528100}, pages = {1106214}, year = {2019}, abstract = {Image restoration is a process used to remove blur (from different sources like object motion or aberrations) from images by either non-blind or blind-deconvolution. The metrics commonly used to quantify the restoration process are peak signal-to-noise ratio (PSNR) and structural similarity index measure (SSIM). Often only a small sample of test images are used (like Lena or the camera guy). In optical design research PSNR and SSIM are not normally used, here image quality metrics based on linear system theory (e.g. modulation transfer function, MTF) are used to quantify optical errors like spherical or chromatic aberration. In this article we investigate how different image restoration algorithms can be quantified by applying image quality metrics. We start with synthetic image data that is used in camera test stands (e.g. Siemens star etc.), apply two different spatially variant degradation algorithms, and restore the original image by a direct method (Wiener filtering within sub-images), and by an iterative method (alternating direction method of multipliers, ADMM). Afterwards we compare the quality metrics (like MTF curves) for the original, the degraded and the restored image. As a first result we show that restoration algorithms sometimes fail in dealing with non-natural scenes, e.g. slanted-edge targets. Further, these first results indicate a correlation between degradation and restoration, i.e. the restoration algorithms are not capable of removing the optically relevant errors introduced by the degradation, a fact neither visible nor available from the PSNR values. We discuss the relevance in the context of the automotive industry, where image restoration may yield distinct advantages for camera-based applications, but testing methods rely on the used image quality metrics.}, language = {en} }