TY - CONF AB - The creation of an RDF knowledge graph for a particular application commonly involves a pipeline of tools that transform a set ofinput data sources into an RDF knowledge graph in a process called dataset augmentation. The components of such augmentation pipelines often require extensive configuration to lead to satisfactory results. Thus, non-experts are often unable to use them. Wepresent an efficient supervised algorithm based on genetic programming for learning knowledge graph augmentation pipelines of arbitrary length. Our approach uses multi-expression learning to learn augmentation pipelines able to achieve a high F-measure on the training data. Our evaluation suggests that our approach can efficiently learn a larger class of RDF dataset augmentation tasks than the state of the art while using only a single training example. Even on the most complex augmentation problem we posed, our approach consistently achieves an average F1-measure of 99% in under 500 iterations with an average runtime of 16 seconds AU - Dreßler, Kevin AU - Sherif, Mohamed AU - Ngonga Ngomo, Axel-Cyrille ID - 31806 KW - 2022 RAKI SFB901 deer dice kevin knowgraphs limes ngonga sherif simba T2 - Proceedings of the 33rd ACM Conference on Hypertext and Hypermedia TI - ADAGIO - Automated Data Augmentation of Knowledge Graphs Using Multi-expression Learning ER - TY - JOUR AU - Redder, Adrian AU - Ramaswamy, Arunselvan AU - Karl, Holger ID - 32854 IS - 13 JF - IFAC-PapersOnLine TI - Practical Network Conditions for the Convergence of Distributed Optimization VL - 55 ER - TY - CONF AU - Hansmeier, Tim AU - Brede, Mathis AU - Platzner, Marco ID - 33253 T2 - GECCO '22: Proceedings of the Genetic and Evolutionary Computation Conference Companion TI - XCS on Embedded Systems: An Analysis of Execution Profiles and Accelerated Classifier Deletion ER - TY - CONF AU - Chen, Wei-Fan AU - Chen, Mei-Hua AU - Mudgal, Garima AU - Wachsmuth, Henning ID - 33274 T2 - Proceedings of the 9th Workshop on Argument Mining (ArgMining 2022) TI - Analyzing Culture-Specific Argument Structures in Learner Essays ER - TY - CONF AU - Maack, Marten AU - Pukrop, Simon AU - Rasmussen, Anna Rodriguez ED - Chechik, Shiri ED - Navarro, Gonzalo ED - Rotenberg, Eva ED - Herman, Grzegorz ID - 33491 T2 - 30th Annual European Symposium on Algorithms, ESA 2022, September 5-9, 2022, Berlin/Potsdam, Germany TI - (In-)Approximability Results for Interval, Resource Restricted, and Low Rank Scheduling VL - 244 ER - TY - GEN AB - We study the consequences of modeling asymmetric bargaining power in two-person bargaining problems. Comparing application of an asymmetric version of a bargaining solution to an upfront modification of the disagreement point, the resulting distortion crucially depends on the bargaining solution concept. While for the Kalai-Smorodinsky solution weaker players benefit from modifying the disagreement point, the situation is reversed for the Nash bargaining solution. There, weaker players are better off in the asymmetric bargaining solution. When comparing application of the asymmetric versions of the Nash and the Kalai-Smorodinsky solutions, we demonstrate that there is an upper bound for the weight of a player, so that she is better off with the Nash bargaining solution. This threshold is ultimately determined by the relative utilitarian bargaining solution. From a mechanism design perspective, our results provide valuable information for a social planner, when implementing a bargaining solution for unequally powerful players. AU - Haake, Claus-Jochen AU - Streck, Thomas ID - 32106 KW - Asymmetric bargaining power KW - Nash bargaining solution KW - Kalai-Smorodinsky bargaining solution TI - Distortion through modeling asymmetric bargaining power VL - 148 ER - TY - GEN AU - Grynko, Yevgen AU - Shkuratov, Yuriy AU - Alhaddad, Samer AU - Förstner, Jens ID - 34136 KW - tet_topic_scattering TI - Light backscattering from numerical analog of planetary regoliths ER - TY - JOUR AB - How can Knowledge In/Equity be addressed in qualitative research by taking the idea of Open Science into account? Two projects from the Open Science Fellows Programme by Wikimedia Deutschland will be used to illustrate how Open Science practices can succeed in qualitative research, thereby reducing In/Equity. In this context, In/Equity is considered as a fair and equal representation of people, their knowledge and insights and comprehends questions about how epistemic, structural, institutional and personal biases generate and shape knowledge as guidance. Three questions guide this approach: firstly, what do we understand by In/Equity in the context of knowledge production in these projects? Secondly, who will be involved in knowledge generation and to what extent will they be valued or unvalued? Thirdly, how can data be made accessible for re-use to enable true participation and sharing? AU - Steinhardt, Isabel AU - Kruschick, Felicitas ID - 34132 JF - Research Ideas and Outcomes KW - Open Science KW - Knowledge Equity KW - Qualitative Methods SN - 2367-7163 TI - Knowledge Equity and Open Science in qualitative research – Practical research considerations VL - 8 ER - TY - JOUR AB - Subwavelength dielectric resonators assembled into metasurfaces have become a versatile tool for miniaturizing optical components approaching the nanoscale. An important class of metasurface functionalities is associated with asymmetry in both the generation and transmission of light with respect to reversals of the positions of emitters and receivers. The nonlinear light–matter interaction in metasurfaces offers a promising pathway towards miniaturization of the asymmetric control of light. Here we demonstrate asymmetric parametric generation of light in nonlinear metasurfaces. We assemble dissimilar nonlinear dielectric resonators into translucent metasurfaces that produce images in the visible spectral range on being illuminated by infrared radiation. By design, the metasurfaces produce different and completely independent images for the reversed direction of illumination, that is, when the positions of the infrared emitter and the visible light receiver are exchanged. Nonlinearity-enabled asymmetric control of light by subwavelength resonators paves the way towards novel nanophotonic components via dense integration of large quantities of nonlinear resonators into compact metasurface designs. AU - Kruk, Sergey S. AU - Wang, Lei AU - Sain, Basudeb AU - Dong, Zhaogang AU - Yang, Joel AU - Zentgraf, Thomas AU - Kivshar, Yuri ID - 32088 JF - Nature Photonics KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 1749-4885 TI - Asymmetric parametric generation of images with nonlinear dielectric metasurfaces VL - 16 ER - TY - CONF AB - In this paper, machine learning techniques will be used to classify different PCB layouts given their electromagnetic frequency spectra. These spectra result from a simulated near-field measurement of electric field strengths at different locations. Measured values consist of real and imaginary parts (amplitude and phase) in X, Y and Z directions. Training data was obtained in the time domain by varying transmission line geometries (size, distance and signaling). It was then transformed into the frequency domain and used as deep neural network input. Principal component analysis was applied to reduce the sample dimension. The results show that classifying different designs is possible with high accuracy based on synthetic data. Future work comprises measurements of real, custom-made PCB with varying parameters to adapt the simulation model and also test the neural network. Finally, the trained model could be used to give hints about the error’s cause when overshooting EMC limits. AU - Maalouly, Jad AU - Hemker, Dennis AU - Hedayat, Christian AU - Rückert, Christian AU - Kaufmann, Ivan AU - Olbrich, Marcel AU - Lange, Sven AU - Mathis, Harald ID - 34140 KW - emc KW - pcb KW - electronic system development KW - machine learning KW - neural network T2 - 2022 Kleinheubach Conference TI - AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development ER - TY - CHAP AU - Hagengruber, Ruth Edith ED - Banse, Gerhard ED - Fuchs-Kittowski, Klaus ID - 34108 T2 - Sitzungsberichte der Leibniz-Sozietät der Wissenschaften 150/151, Jahrgang 2022: „Cyberscience – Wissenschaftsforschung und Informatik. Digitale Medien und die Zukunft der Kultur wissenschaftlicher Tätigkeit. Arbeitskreis „Emergente Systeme/Informatik und Gesellschaft“ der Leibniz-Sozietät der Wissenschaften zu Berlin in Kooperation mit der Gesellschaft für Wissenschaftsforschung“ TI - Die „dritte Wissensdimension“. Eine Epistemologie für eine neue Wissenswelt ER - TY - CHAP AB - This work addresses the automatic resolution of software requirements. In the vision of On-The-Fly Computing, software services should be composed on demand, based solely on natural language input from human users. To enable this, we build a chatbot solution that works with human-in-the-loop support to receive, analyze, correct, and complete their software requirements. The chatbot is equipped with a natural language processing pipeline and a large knowledge base, as well as sophisticated dialogue management skills to enhance the user experience. Previous solutions have focused on analyzing software requirements to point out errors such as vagueness, ambiguity, or incompleteness. Our work shows how apps can collaborate with users to efficiently produce correct requirements. We developed and compared three different chatbot apps that can work with built-in knowledge. We rely on ChatterBot, DialoGPT and Rasa for this purpose. While DialoGPT provides its own knowledge base, Rasa is the best system to combine the text mining and knowledge solutions at our disposal. The evaluation shows that users accept 73% of the suggested answers from Rasa, while they accept only 63% from DialoGPT or even 36% from ChatterBot. AU - Kersting, Joschka AU - Ahmed, Mobeen AU - Geierhos, Michaela ED - Stephanidis, Constantine ED - Antona, Margherita ED - Ntoa, Stavroula ID - 32179 KW - On-The-Fly Computing KW - Chatbot KW - Knowledge Base SN - 1865-0929 T2 - HCI International 2022 Posters TI - Chatbot-Enhanced Requirements Resolution for Automated Service Compositions VL - 1580 ER - TY - CONF AU - Otroshi, Mortaza AU - Meschut, Gerson ID - 34152 TI - Methodenentwicklung zur Verbesserung der Schädigungsmodellierung in der numerischen 3D-Belastungssimulation mechanischer Fügeverfahren unter Berücksichtigung der fügeinduzierten Vorbeanspruchung ER - TY - CONF AU - Krauter, Stefan AU - Bendfeld, Jörg ID - 34155 T2 - Proceedings of the 8th World Conference on Photovoltaik Energy Conversion TI - Microinverter PV Systems: New Efficiency Rankings and Formula for Energy Yield Assessment for any PV Panel Size at different Microinverter types ER - TY - CONF AU - Kakande, Josephine Nakato AU - Philipo, Godiana Hagile AU - Krauter, Stefan ID - 34156 T2 - Proceedings of the 8th World Conference on Photovoltaik Energy Conversion TI - Optimal Design of a Semi Grid-Connected PV System for a Site in Lwak, Kenya Using HOMER ER - TY - GEN AU - Otroshi, Mortaza AU - Meschut, Gerson ID - 34153 TI - Schädigungsmodellierung von Hilfsfügeelementen beim mechanischen Fügen von Stahlwerkstoffen ER - TY - THES AB - Wettstreit zwischen der Entwicklung neuer Hardwaretrojaner und entsprechender Gegenmaßnahmen beschreiten Widersacher immer raffiniertere Wege um Schaltungsentwürfe zu infizieren und dabei selbst fortgeschrittene Test- und Verifikationsmethoden zu überlisten. Abgesehen von den konventionellen Methoden um einen Trojaner in eine Schaltung für ein Field-programmable Gate Array (FPGA) einzuschleusen, können auch die Entwurfswerkzeuge heimlich kompromittiert werden um einen Angreifer dabei zu unterstützen einen erfolgreichen Angriff durchzuführen, der zum Beispiel Fehlfunktionen oder ungewollte Informationsabflüsse bewirken kann. Diese Dissertation beschäftigt sich hauptsächlich mit den beiden Blickwinkeln auf Hardwaretrojaner in rekonfigurierbaren Systemen, einerseits der Perspektive des Verteidigers mit einer Methode zur Erkennung von Trojanern auf der Bitstromebene, und andererseits derjenigen des Angreifers mit einer neuartigen Angriffsmethode für FPGA Trojaner. Für die Verteidigung gegen den Trojaner ``Heimtückische LUT'' stellen wir die allererste erfolgreiche Gegenmaßnahme vor, die durch Verifikation mittels Proof-carrying Hardware (PCH) auf der Bitstromebene direkt vor der Konfiguration der Hardware angewendet werden kann, und präsentieren ein vollständiges Schema für den Entwurf und die Verifikation von Schaltungen für iCE40 FPGAs. Für die Gegenseite führen wir einen neuen Angriff ein, welcher bösartiges Routing im eingefügten Trojaner ausnutzt um selbst im fertigen Bitstrom in einem inaktiven Zustand zu verbleiben: Hierdurch kann dieser neuartige Angriff zur Zeit weder von herkömmlichen Test- und Verifikationsmethoden, noch von unserer vorher vorgestellten Verifikation auf der Bitstromebene entdeckt werden. AU - Ahmed, Qazi Arbab ID - 29769 KW - FPGA Security KW - Hardware Trojans KW - Bitstream-level Trojans KW - Bitstream Verification TI - Hardware Trojans in Reconfigurable Computing ER - TY - CONF AB - Within innovation management, choosing the best fitting product idea is the most important decision point. The future existence and success of the organization is depending on selected product ideas. To find the best fitting idea for an organization, it needs evaluation criteria representing the organizations mission Therefore, this study focuses on a holistic overview about evaluation criteria and on supporting organizations in the process to select its individual evaluation criteria. Based on a literature study, existing approaches regarding evaluation criteria in product idea selection are identified and a list of evaluation criteria is reworked. Using the list of evaluation criteria, a prioritization method is created. Within an interview with experts in innovation management, the method is discussed regarding usability and the level of assistance in product idea selection. The developed criteria can be used directly by innovation manager and industrial practitioners to evaluate potential product ideas. AU - Gräßler, Iris AU - Koch, Anna-Sophie ID - 34166 KW - innovation management KW - evaluation criteria KW - idea selection KW - idea evaluation KW - meta-study SN - 978-952-335-694-8 T2 - XXXIII Proceedings of the ISPIM Innovation Conference TI - Evaluation Criteria in Product Idea Selection Decisions ER - TY - THES AB - Anforderungsänderungen sind ein wesentlicher Grund für Ineffizienzen und Projektfehlschläge in der Entwicklung komplexer technischer Systeme. Proaktives Management von Anforderungsänderungen hat das Potenzial, den Umgang mit Anforderungsänderungen effizienter zu gestalten. Dafür ist ein systematischer Ansatz erforderlich, der eine ganzheitliche Bewertung und Handhabung des Änderungsrisikos im industriellen Entwicklungskontext ermöglicht. Im Rahmen dieser Dissertation wird mit der ProMaRC-Methodik ein neuartiger Ansatz für das proaktive Management von Anforderungsänderungen vorgestellt. Die Methodik wurde in enger Zusammenarbeit mit Industrieanwender:innen aus der Automobilindustrie entwickelt und anhand von fünf Fallstudien validiert. Mittels automatisierter Abhängigkeitsanalyse auf Grundlage künstlicher Intelligenz wird der Anwendungsaufwand gegenüber bestehenden Ansätzen reduziert. Die teilautomatisierte Bewertung und Handhabung der Änderungswahrscheinlichkeit und -auswirkung erfolgt anhand eines modifizierten PageRank-Algorithmus und umfasst erstmalig alle für die Risikoanalyse relevanten Einflussfaktoren. Die Validierung belegt, dass durch die ProMaRC-Methodik eine überzeugende Kombination aus praxistauglichem Anwendungsaufwand und Vollständigkeit der Analyse erzielt wird. Damit erschließt diese Dissertation das bisher kaum beachtete Forschungsfeld des proaktiven Managements von Anforderungsänderungen und fördert eine effizientere Produktentwicklung. AU - Oleff, Christian ID - 34174 TI - Proaktives Management von Anforderungsänderungen in der Entwicklung komplexer technischer Systeme VL - 406 ER - TY - CONF AB - This paper aims at discussing past limitations set in sentiment analysis research regarding explicit and implicit mentions of opinions. Previous studies have regularly neglected this question in favor of methodical research on standard-datasets. Furthermore, they were limited to linguistically less-diverse domains, such as commercial product reviews. We face this issue by annotating a German-language physician review dataset that contains numerous implicit, long, and complex statements that indicate aspect ratings, such as the physician’s friendliness. We discuss the nature of implicit statements and present various samples to illustrate the challenge described. AU - Kersting, Joschka AU - Bäumer, Frederik Simon ED - Kersting, Joschka ID - 31054 KW - Sentiment analysis KW - Natural language processing KW - Aspect phrase extraction T2 - Proceedings of the Fourteenth International Conference on Pervasive Patterns and Applications (PATTERNS 2022): Special Track AI-DRSWA: Maturing Artificial Intelligence - Data Science for Real-World Applications TI - Implicit Statements in Healthcare Reviews: A Challenge for Sentiment Analysis ER - TY - JOUR AU - Hoyer, Britta AU - De Jaegher, Kris ID - 31881 JF - International Journal of Game Theory TI - Network Disruption and the Common-Enemy Effect ER - TY - GEN AB - BloKK-Beitrag für das ZeKK, 03.12.2022 AU - Lebock, Sarah ID - 34187 TI - Blogpost "Von der Grundstimmung als philosophischer Ausgangspunkt" ER - TY - JOUR AB - Far-field multi-speaker automatic speech recognition (ASR) has drawn increasing attention in recent years. Most existing methods feature a signal processing frontend and an ASR backend. In realistic scenarios, these modules are usually trained separately or progressively, which suffers from either inter-module mismatch or a complicated training process. In this paper, we propose an end-to-end multi-channel model that jointly optimizes the speech enhancement (including speech dereverberation, denoising, and separation) frontend and the ASR backend as a single system. To the best of our knowledge, this is the first work that proposes to optimize dereverberation, beamforming, and multi-speaker ASR in a fully end-to-end manner. The frontend module consists of a weighted prediction error (WPE) based submodule for dereverberation and a neural beamformer for denoising and speech separation. For the backend, we adopt a widely used end-to-end (E2E) ASR architecture. It is worth noting that the entire model is differentiable and can be optimized in a fully end-to-end manner using only the ASR criterion, without the need of parallel signal-level labels. We evaluate the proposed model on several multi-speaker benchmark datasets, and experimental results show that the fully E2E ASR model can achieve competitive performance on both noisy and reverberant conditions, with over 30% relative word error rate (WER) reduction over the single-channel baseline systems. AU - Zhang, Wangyou AU - Chang, Xuankai AU - Boeddeker, Christoph AU - Nakatani, Tomohiro AU - Watanabe, Shinji AU - Qian, Yanmin ID - 33669 JF - IEEE/ACM Transactions on Audio, Speech, and Language Processing SN - Print ISSN: 2329-9290 Electronic ISSN: 2329-9304 TI - End-to-End Dereverberation, Beamforming, and Speech Recognition in A Cocktail Party ER - TY - JOUR AB - AbstractComprehensive data understanding is a key success driver for data analytics projects. Knowing the characteristics of the data helps a lot in selecting the appropriate data analysis techniques. Especially in data-driven product planning, knowledge about the data is a necessary prerequisite because data of the use phase is very heterogeneous. However, companies often do not have the necessary know-how or time to build up solid data understanding in connection with data analysis. In this paper, we develop a methodology to organize and categorize and thus understand use phase data in a way that makes it accessible to general data analytics workflows, following a design science research approach. We first present a knowledge base that lists typical use phase data from a product planning view. Second, we develop a taxonomy based on standard literature and real data objects, which covers the diversity of the data considered. The taxonomy provides 8 dimensions that support classification of use phase data and allows to capture data characteristics from a data analytics view. Finally, we combine both views by clustering the objects of the knowledge base according to the taxonomy. Each of the resulting clusters covers a typical combination of analytics relevant characteristics occurring in practice. By abstracting from the diversity of use phase data into artifacts with manageable complexity, our approach provides guidance to choose appropriate data analysis and AI techniques. AU - Panzner, Melina AU - von Enzberg, Sebastian AU - Meyer, Maurice AU - Dumitrescu, Roman ID - 34197 JF - Journal of the Knowledge Economy KW - Economics and Econometrics SN - 1868-7865 TI - Characterization of Usage Data with the Help of Data Classifications ER - TY - JOUR AB - Mounting sensors in disk stack separators is often a major challenge due to the operating conditions. However, a process cannot be optimally monitored without sensors. Virtual sensors can be a solution to calculate the sought parameters from measurable values. We measured the vibrations of disk stack separators and applied machine learning (ML) to detect whether the separator contains only water or whether particles are also present. We combined seven ML classification algorithms with three feature engineering strategies and evaluated our model successfully on vibration data of an experimental disk stack separator. Our experimental results demonstrate that random forest in combination with manual feature engineering using domain specific knowledge about suitable features outperforms all other models with an accuracy of 91.27 %. AU - Merkelbach, Silke AU - Afroze, Lameya AU - Janssen, Nils AU - von Enzberg, Sebastian AU - Kühn, Arno AU - Dumitrescu, Roman ID - 34196 JF - Vibroengineering PROCEDIA KW - General Medicine SN - 2345-0533 TI - Using vibration data to classify conditions in disk stack separators VL - 46 ER - TY - CHAP AU - Hobscheidt, Daniela AU - Menzefricke, Jörn Steffen AU - Gabriel, Stefan AU - Kühn, Arno AU - Dumitrescu, Roman ID - 34195 SN - 9783658383787 T2 - Praxishandbuch Robotic Process Automation (RPA) TI - Soziotechnische Herausforderungen bei der Einführung von RPA managen ER - TY - CHAP AU - Bansmann, Michael AU - Dumitrescu, Roman AU - Fechtelpeter, Christian ID - 34193 SN - 2523-3637 T2 - Gestaltung digitalisierter Arbeitswelten TI - Transfer von Arbeit 4.0-Anwendungsszenarien ER - TY - CHAP AU - Brock, Jonathan AU - von Enzberg, Sebastian AU - Kühn, Arno AU - Dumitrescu, Roman ID - 34194 SN - 9783658383787 T2 - Praxishandbuch Robotic Process Automation (RPA) TI - Nutzung von Process Mining in RPA-Projekten ER - TY - JOUR AB - Praxeologische Kompetenzansätze verstehen Kompetenz als sozial erlernt und folglich als relativ zum sozialen Kontext. Damit einher geht die Frage, wie solche praxeologisch gerahmten Kompetenzen eigentlich unabhängig von der sie hervorbringenden Praxis evaluiert werden können – und eben dadurch erst für einen breiteren Kompetenzdiskurs fruchtbar sind. Die Dokumentarische Evaluationsforschung bietet hierzu erste Anhaltspunkte, offenbart aber auch Grenzen, die mit dem Evaluationsverständnis zusammenhängen, sich jedoch in der Forschungspraxis so nicht finden lassen. Aus der Differenz zwischen Methode und Praxis dokumentarischer Evaluation lässt sich formulieren, wie eine praxeologische Evaluation gestaltet werden könnte. Dabei spielt die Formulierung von Referenzrahmen eine zentrale Rolle, welche einerseits der zu evaluierenden Praktik external sein, andererseits praktisch formuliert werden müssen, damit sie soziale Praktiken jenseits ihrer eigenen Sinnhaftigkeit evaluativ (er-)fassen können. AU - Bloh, Thiemo ID - 34200 IS - 02 JF - Zeitschrift für Evaluation KW - Strategy and Management KW - Applied Psychology KW - Social Sciences (miscellaneous) KW - Education KW - Communication KW - Statistics and Probability SN - 1619-5515 TI - Rekonstruktive Evaluationsforschung im Kontext praxeologischer Kompetenzdiskurse. Kritische Reflexionen und konzeptionelle Überlegungen zur Dokumentarischen Evaluationsforschung VL - 2022 ER - TY - JOUR AU - Bloh, Thiemo AU - Caruso, Carina ID - 34198 JF - die hochschullehre TI - Ein kritisch-multiperspektivischer Blick auf Forschendes Lernen in der Lehrkräftebildung. Fragen, Erwägungen und Rekonstruktionen. VL - 8 ER - TY - JOUR AU - Bloh, Thiemo ID - 34199 IS - 6 JF - Zeitschrift für Pädagogik TI - Grundlagentheoretische Differenzen in der Lehrkräftekooperationsforschung VL - 68 ER - TY - JOUR AB - AlSi casting alloys combine excellent castability with high strength. Hence, this group of alloys is often used in the automotive sector. The challenge for this application is the brittle character of these alloys which leads to cracks during joint formation when mechanical joining technologies are used. A rise in ductility can be achieved by a considerable increase in the solidification rate which results in grain refinement. High solidification rates can be realized in twin–roll casting (TRC) by water-cooled rolls. Therefore, a hypoeutectic EN AC–AlSi9 (for European Norm - aluminum cast product) is manufactured by the TRC process and analyzed. Subsequently, joining investigations are performed on castings in as-cast and heat-treated condition using the self-piercing riveting process considering the joint formation and the load-bearing capacity. Due to the fine microstructure, the crack initiation can be avoided during joining, while maintaining the joining parameters, especially by specimens in heat treatment conditions. Furthermore, due to the extremely fine microstructure, the load-bearing capacity of the joint can be significantly increased in terms of the maximum load-bearing force and the energy absorbed. AU - Neuser, Moritz AU - Kappe, Fabian AU - Ostermeier, Jakob AU - Krüger, Jan Tobias AU - Bobbert, Mathias AU - Meschut, Gerson AU - Schaper, Mirko AU - Grydin, Olexandr ID - 34207 IS - 10 JF - Advanced Engineering Materials KW - Condensed Matter Physics KW - General Materials Science SN - 1438-1656 TI - Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting VL - 24 ER - TY - CONF AU - Bloh, Thiemo ID - 34203 TI - Was bedeutet Post-Digitalität? – Universitäre Lehrpraktiken zwischen situativer Anforderung und habitueller Prägung ER - TY - CONF AU - Bloh, Thiemo ID - 34201 TI - AussteigerInnen – Fluchtbewegungen in der LehrerInnenbiographie ER - TY - CONF AU - Bloh, Thiemo ID - 34202 TI - „Referenzrahmen“ als gewinnbringendes Konstrukt im Kontext Dokumentarischer Evaluationsforschung!? ER - TY - CONF AU - Bloh, Thiemo ID - 34204 TI - The Deconstruction of Professionalism ER - TY - CHAP AB - Nowadays, clinching is a widely used joining technique, where sheets are joined by pure deformation to create an interlock without the need for auxiliary parts. This leads to advantages such as reduced joining time and manufacturing costs. On the other hand, the joint strength solely relies on directed material deformation, which renders an accurate material modelling essential to reliably predict the joint forming. The formation of the joint locally involves large plastic strains and possibly complex non-proportional loading paths, as typical of many metal forming applications. Consequently, a finite plasticity formulation is utilised incorporating a Chaboche–Rousselier kinematic hardening law to capture the Bauschinger effect. Material parameters are identified from tension–compression tests on miniature spec- imens for the dual-phase steel HCT590X. The resulting material model is implemented in LS-Dyna to study the locally diverse loading paths and give a quantitative statement on the importance of kinematic hardening for clinching. It turns out that the Bauschinger effect mainly affects the springback of the sheets and has a smaller effect on the joint forming itself. AU - Friedlein, Johannes AU - Mergheim, Julia AU - Steinmann, Paul ID - 34211 KW - Clinching KW - Material modelling KW - Kinematic hardening KW - Parameter identification KW - Bauschinger effect SN - 2367-1181 T2 - The Minerals, Metals & Materials Series TI - Influence of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal ER - TY - JOUR AB - In this paper, a study based on experimental and numerical simulations is performed to analyze fatigue cracks in clinched joints. An experimental investigation is conducted to determine the failure modes of clinched joints under cyclic loading at different load amplitudes with single-lap shear tests. In addition, numerical FEM simulations of clinching process and subsequent shear loading are performed to support the experimental investigations by analyzing the state of stresses at the location of failure. An attempt is made to explain the location of crack initiation in the experiments using evaluation variables such as contact shear stress and maximum principal stress. AU - Ewenz, L. AU - Bielak, Christian Roman AU - Otroshi, Mortaza AU - Bobbert, Mathias AU - Meschut, Gerson AU - Zimmermann, M. ID - 34213 IS - 2-3 JF - Production Engineering KW - Industrial and Manufacturing Engineering KW - Mechanical Engineering SN - 0944-6524 TI - Numerical and experimental identification of fatigue crack initiation sites in clinched joints VL - 16 ER - TY - CHAP AB - Force–displacement measurements and micrograph analyses are commonly used methods to validate numerical models of clinching processes. However, these methods often lead to resetting of elastic deformations and crack- closing after unloading. In contrast, the in situ computed tomography (CT) can provide three-dimensional images of the clinch point under loading conditions. In this paper, the potential of the in situ investigation of a clinching process as validation method is analyzed. For the in situ testing, a tailored test set-up featuring a beryllium cylinder for load-bearing and clinching tools made from ultra-high-strength titanium and Si3N4 are used. In the experiments, the clinching of two aluminum sheets is interrupted at specific process steps in order to perform the CT scans. It is shown that in situ CT visualizes the inner geometry of the joint at high precision and that this method is suitable to validate numerical models. AU - Köhler, Daniel AU - Kupfer, Robert AU - Troschitz, Juliane AU - Gude, Maik ID - 34212 KW - Clinching KW - Non-destructive testing KW - Computed tomography KW - In situ CT SN - 2367-1181 T2 - The Minerals, Metals & Materials Series TI - Clinching in In Situ CT—A Novel Validation Method for Mechanical Joining Processes ER - TY - JOUR AB - Resource-saving and sustainable production is becoming increasingly important regarding social, political and economic aspects, thus making the use of lightweight-construction technologies a current trend. For this reason, multi-material-systems made of high-strength steel and aluminium as well as metal and fibre-reinforced plastics gain in importance. However, different material properties, e.g. stiffness, thermal expansion coefficients or chemical incompatibilities, are challenging for conventional joining technologies. Joining by cold formed pin structures has shown to have high potential for joining multi-material-systems. These pins can be joined either by direct pin pressing into an unperforated joining partner or by caulking, where the pins are inserted through a pre-punched joining partner and the pin head is upset, resulting in a form-fit joint. Usually, cylindrical pins are used for joining. However, non-rotationally symmetrical pin geometries offer the possibility of introducing a predetermined breaking point or reinforcing a connection in the principal force direction. In this work, cylindrical pins as well as non-rotationally symmetrical pin geometries, such as polygonal and oval pin structures, are cold extruded from the sheet metal plane of an HCT590X+Z dual phase steel and joined in the next step with an EN AW-6014 aluminium using direct pin pressing. Since the formation of an undercut has an crucial influence on the joint strength, the investigations will be focused on the resulting joint geometry. In addition, the effect of different pin heights will be examined to analyse the joint formation at different levels of compression of the pin structures. Finally, the joints are evaluated regarding their joint strength in tensile shear tests and cross tension tests. Here the flow resistance of the geometry used as well as the pin height and thus the strain hardening of the pin base during the extrusion of the pins play a decisive role for the shear strength. AU - Römisch, David AU - Kraus, Martin AU - Merklein, Marion ID - 34219 IS - 6 JF - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications KW - Mechanical Engineering KW - General Materials Science SN - 1464-4207 TI - Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing VL - 236 ER - TY - JOUR AB - In this study, quasi-unidirectional continuous fiber reinforced thermoplastics (CFRTs) are joined with metal sheets via cold formed cylindrical, elliptical and polygonal pin structures which are directly pressed into the CFRT component after local infrared heating. In comparison to already available studies, the unique novelty is the use of non-rotational symmetric pin structures for the CFRT/metal hybrid joining. Thus, a variation in the fiber orientation in the CFRT component as well as a variation in the non-rotational symmetric pins’ orientation in relation to the sample orientation is conducted. The created samples are consequently mechanically tested via single lap shear experiments in a quasi-static state. Finally, the failure behavior of the single lap shear samples is investigated with the help of microscopic images and detailed photographs. In the single lap shear tests, it could be shown that non-rotational symmetric pin structures lead to an increase in maximum testing forces of up to 74% when compared to cylindrical pins. However, when normalized to the pin foot print related joint strength, only one polygonal pin variation showed increased joint strength in comparison to cylindrical pin structures. The investigation of the failure behavior showed two distinct failure modes. The first failure mode was failure of the CFRT component due to an exceedance of the maximum bearing strength of the pin-hole leading to significant damage in the CFRT component. The second failure mode was pin-deflection due to the applied testing load and a subsequent pin extraction from the CFRT component resulting in significantly less visible damage in the CFRT component. Generally, CFRT failure is more likely with a fiber orientation of 0° in relation to the load direction while pin extraction typically occurs with a fiber orientation of 90°. It is assumed that for future investigations, pin structures with an undercutting shape that creates an interlocking joint could counteract the tendency for pin-extraction and consequently lead to increased maximum joint strengths. AU - Popp, Julian AU - Römisch, David AU - Merklein, Marion AU - Drummer, Dietmar ID - 34223 IS - 10 JF - Applied Sciences KW - Fluid Flow and Transfer Processes KW - Computer Science Applications KW - Process Chemistry and Technology KW - General Engineering KW - Instrumentation KW - General Materials Science SN - 2076-3417 TI - Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures VL - 12 ER - TY - JOUR AB - Thermoplastic composites (TPCs) are predestined for use in lightweight structures, especially for high-volume applications. In many cases, joining is a key factor for the successful application of TPCs in multi-material systems. Many joining processes for this material group are based on warm forming the joining zone. This results in a change of the local material structure characterised by modified fibre paths, as well as varying fibre contents, which significantly influences the load-bearing behaviour. During the forming process, many different phenomena occur simultaneously at different scales. In this paper, the deformation modes and flow mechanisms of TPCs during forming described in the literature are first analysed. Based on this, three different joining processes are investigated: embedding of inserts, moulding of contour joints, and hotclinching. In order to identify the phenomena occurring in each process and to describe the characteristic resulting material structure in the joining zones, micrographs as well as computed tomography (CT) analyses are performed for both individual process stages and final joining zones. AU - Troschitz, Juliane AU - Gröger, Benjamin AU - Würfel, Veit AU - Kupfer, Robert AU - Gude, Maik ID - 34225 IS - 15 JF - Materials SN - 1996-1944 TI - Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation VL - 15 ER - TY - JOUR AB - Unter dem Begriff der Auflösung wird für gewöhnlich das kleinste messbare Merkmal eines Messsystems verstanden. In der dimensionellen Computertomografie hingegen haben sich in den vergangenen Jahren mehrere Auflösungskonzepte etabliert, die aufgrund der fehlenden Normung zueinander im Kontrast stehen. In diesem Beitrag werden die drei häufigsten Konzepte, die Voxelgröße, die Ortsauflösung und die metrologische Strukturauflösung in Kürze vorgestellt. Anschließend wird eine Abgrenzung zwischen den Konzepten getroffen und ein Integration der bestehenden Konzepte in ein gemeinsames Amplituden-Wellenlängen Diagramm diskutiert. AU - Binder, Felix AU - Hausotte, Tino ID - 34221 IS - s1 JF - tm - Technisches Messen KW - Electrical and Electronic Engineering KW - Instrumentation SN - 2196-7113 TI - Über die Abgrenzung von Auflösungskonzepten in der industriellen Computertomografie VL - 89 ER - TY - JOUR AB - Die Erkennbarkeit von Rissen und geometrischen Qualitätskennwerten von Fügeverbindungen mittels Computertomografie ist von der Interfacestrukturauflösung abhängig, welche mittels geeigneter Prüfkörper untersucht wird. Die Reduktion von Abbildungsartefakten im Bereich von Bauteilzwischenräumen und -oberflächen verbessert deren dimensionelle Erfassbarkeit. AU - Busch, Matthias AU - Butzhammer, Lorenz AU - Hausotte, Tino ID - 34220 IS - s1 JF - tm - Technisches Messen KW - Electrical and Electronic Engineering KW - Instrumentation SN - 2196-7113 TI - Herausforderungen bei computertomografischen Untersuchungen von Fügeverbindungen VL - 89 ER - TY - CONF AU - Marx, Julian AU - Rieskamp, Jonas AU - Mirbabaie, Milad ID - 33519 T2 - Proceedings of the 33rd Australasian Conference on Information Systems TI - ‘Just a Normal Day in the Metaverse’ – Distraction Conflicts of Knowledge Work in Virtual Environments ER - TY - CONF AU - Alshomary, Milad AU - Rieskamp, Jonas AU - Wachsmuth, Henning ID - 32247 T2 - Proceedings of the 9th International Conference on Computational Models of Argument TI - Generating Contrastive Snippets for Argument Search ER - TY - THES AB - Das Ultraschall-Dickdrahtbonden mit Aluminiumdraht ist ein Standardverfahren zur elektrischenKontaktierung von Leistungshalbleitermodulen. Die steigenden Anforderungen an die Effizienzund Zuverlässigkeit der Module haben zu technologischen Weiterentwicklungen geführt und eswerden vermehrt Kupferdrähte mit wesentlich besseren elektrischen und thermischen Eigenschafteneingesetzt. Hieraus resultieren durch höhere Prozesskräfte und Ultraschallleistung neueHerausforderungen bei der Prozessentwicklung; hierfür wird ein Simulationsmodell zur Verbesserungder Prozessentwicklung entwickelt.In Ultraschall-Drahtbondversuchen mit 400 m Aluminium und Kupfer Drähten wurde der Einflussder Prozessparameter auf die Bondqualität untersucht; diese Ergebnisse und zusätzliche Messungender Drahtdeformation und Schwingungen wurden für die Formulierung der Anforderungenund zur Validierung der Ergebnisse des Simulationsmodells genutzt.Es wurde ein Prozessmodell, basierend auf einer Co-Simulation zwischen MATLAB und ANSYS,entwickelt; hierbei wurden die phyiskalischen Phänomene wie die Ultraschall Werkstoffentfestigung,der Verbindungsaufbau und die dynamischen Systemeigenschaften abgebildet.Basierend auf einer Zug-Druck-Prüfmaschine wurde ein Prüfstand zur Identifikation der Modellparameterentwickelt. In zusätzlichen Druckversuchen mit den Bonddrähten mit und ohneUltraschallanregung wurde die Reduktion der Umformkräfte unter Ultraschalleinfluss untersucht.Mit dem entwickelten Prozessmodell wurden die Parameterstudien aus den Ultraschall-Drahtbondversuchensimuliert und direkt mit den experimentellen Ergebnissen verglichen, wobei sich einerelativ gute Übereinstimmung zwischen Simulation und Messung sowohl für Aluminium, als auchfür Kupfer, erzielen ließ. AU - Schemmel, Reinhard ID - 34272 SN - 978-3-8440-8527-3 TI - Enhanced process development by simulation of ultrasonic heavy wire bonding VL - 13 ER - TY - JOUR AU - Gutt, Jana Kim AU - Thommes, Kirsten ID - 34283 IS - 1 JF - Academy of Management Proceedings KW - Microbiology SN - 0065-0668 TI - Speaking of Performance: Evaluating Team Members’ Performance with Open-Ended Audio Comments VL - 2022 ER - TY - CONF AU - Trentinaglia, Roman ID - 34298 T2 - Proceedings of the 25th International Conference on Model Driven Engineering Languages and Systems: Companion Proceedings TI - Deriving model-based safety and security assurance cases from design rationale of countermeasure patterns ER - TY - JOUR AB - Eines der Lernziele des Physikstudiums stellt der Erwerb literaler Fähigkeiten für das Verfassen wissenschaftlicher Arbeiten dar. Die Student:innen werden allerdings im Rahmen ihres Studiums bisher kaum systematisch beim Erwerb dieser Fähigkeiten unterstützt. Eine Übungsgelegenheit für das Verfassen von Texten nach wissenschaftlichem Vorbild stellt das Laborpraktikum dar, in dem die Student:innen zu den absolvierten Experimenten Laborberichte verfassen. Im Paderborner Physik Praktikum 3P wurden in den letzten Jahren vier unterschiedliche Unterstützungsangebote für das Erlernen des wissenschaftlichen Schreibens entwickelt und mittels Zufriedenheitswerten evaluiert. In dem Beitrag werden die vier Angebote auf inhaltlicher Ebene hinsichtlich der Lernwirksamkeit mittels einer schriftproduktbasierten Evaluation analysiert. Durch die vergleichende Analyse können Potenziale und Grenzen der Angebote diskutiert und Implikationen für die Gestaltung von Unterstützungsangeboten zum Erlernen des wissenschaftlichen Schreibens in der Physik abgeleitet werden. AU - Bauer, Anna Brigitte AU - Lahme, Simon Zacharias AU - Sacher, Marc ID - 34316 IS - 1 JF - PhyDid A - Physik und Didaktik in Schule und Hochschule KW - Laborpraktikum KW - Schreiben TI - Potenziale und Grenzen von Unterstützungsmaßnahmen zum wissenschaftlichen Schreiben im Paderborner Physik Praktikum 3P VL - 21 ER - TY - JOUR AB - AbstractThe solvation of ions changes the physical, chemical and thermodynamic properties of water, and the microscopic origin of this behaviour is believed to be ion-induced perturbation of water’s hydrogen-bonding network. Here we provide microscopic insights into this process by monitoring the dissipation of energy in salt solutions using time-resolved terahertz–Raman spectroscopy. We resonantly drive the low-frequency rotational dynamics of water molecules using intense terahertz pulses and probe the Raman response of their intermolecular translational motions. We find that the intermolecular rotational-to-translational energy transfer is enhanced by highly charged cations and is drastically reduced by highly charged anions, scaling with the ion surface charge density and ion concentration. Our molecular dynamics simulations reveal that the water–water hydrogen-bond strength between the first and second solvation shells of cations increases, while it decreases around anions. The opposite effects of cations and anions on the intermolecular interactions of water resemble the effects of ions on the stabilization and denaturation of proteins. AU - Balos, Vasileios AU - Kaliannan, Naveen Kumar AU - Elgabarty, Hossam AU - Wolf, Martin AU - Kühne, Thomas AU - Sajadi, Mohsen ID - 34300 IS - 9 JF - Nature Chemistry KW - General Chemical Engineering KW - General Chemistry SN - 1755-4330 TI - Time-resolved terahertz–Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water VL - 14 ER - TY - BOOK AB - Wie werden technische Systeme zeitgemäß entwickelt, die in Komplexität und Anspruch alles bisher Dagewesene übertreffen? Darauf gibt Systems Engineering Antworten. Bisherige Beschreibungen sind für den Maschinenbau aber oft schwer greifbar und zu unkonkret. Dieses Buch bricht den internationalen Stand der Wissenschaft auf das Wesentliche herunter und beschreibt praxisnah die Kernelemente des Systems Engineering. Eine konkrete Schritt-für-Schritt Anleitung ebnet den Weg für den erfolgreichen Transfer aus der klassischen Produktentwicklung hin zum Systems Engineering. Die Inhalte werden grafisch professionell und bewusst lebendig vermittelt. So wird nicht nur ein fundiertes Systems Engineering-Verständnis geschaffen, sondern auch die Basis für Kommunikation und Umsetzung im Unternehmen gelegt. AU - Gräßler, Iris AU - Oleff, Christian ID - 34397 SN - 978-3-662-64516-1 TI - Systems Engineering - verstehen und industriell umsetzen ER - TY - CONF AB - Challenges in the development of resource-efficient lightweight designs, such as emission and cost targets in production, lead to an increasing demand for environmentally friendly and fast joining processes. Therefore, cold-forming mechanical joining techniques provide an energy-efficient alternative in comparison to established processes, such as spot welding. However, to ensure a sufficient reliability of the product design, not only the selection of an appropriate manufacturing and joining method, but also the suitable dimensioning and validation of the entire joining process is a crucial step. In this context, thermal processes offer a large number of design principles while mechanical joining methods mainly require extensive experimental tests and the inclusion of expert knowledge. Although few contributions already investigated the data-based analysis of mechanical joints, a system for the requirement- and manufacturing-oriented dimensioning of joining components, such as different profiles and blanks, in combination with the estimation of joint properties is not available yet. Motivated by this lack, this contribution introduces an engineering workbench for the support of design engineers in the early development phases of the knowledge and data-based design of mechanical joining connections using clinching as an example. In this regard, the approach is demonstrated involving a similar material and sheet thickness combination with static loads. AU - Zirngibl, Christoph AU - Sauer, Christopher AU - Schleich, Benjamin AU - Wartzack, Sandro ID - 34415 T2 - Volume 2: 42nd Computers and Information in Engineering Conference (CIE) TI - Knowledge and Data-Based Design and Dimensioning of Mechanical Joining Connections ER - TY - JOUR AB - Given strict emission targets and legal requirements, especially in the automotive industry, environmentally friendly and simultaneously versatile applicable production technologies are gaining importance. In this regard, the use of mechanical joining processes, such as clinching, enable assembly sheet metals to achieve strength properties similar to those of established thermal joining technologies. However, to guarantee a high reliability of the generated joint connection, the selection of a best-fitting joining technology as well as the meaningful description of individual joint properties is essential. In the context of clinching, few contributions have to date investigated the metamodel-based estimation and optimization of joint characteristics, such as neck or interlock thickness, by applying machine learning and genetic algorithms. Therefore, several regression models have been trained on varying databases and amounts of input parameters. However, if product engineers can only provide limited data for a new joining task, such as incomplete information on applied joining tool dimensions, previously trained metamodels often reach their limits. This often results in a significant loss of prediction quality and leads to increasing uncertainties and inaccuracies within the metamodel-based design of a clinch joint connection. Motivated by this, the presented contribution investigates different machine learning algorithms regarding their ability to achieve a satisfying estimation accuracy on limited input data applying a statistically based feature selection method. Through this, it is possible to identify which regression models are suitable to predict clinch joint characteristics considering only a minimum set of required input features. Thus, in addition to the opportunity to decrease the training effort as well as the model complexity, the subsequent formulation of design equations can pave the way to a more versatile application and reuse of pretrained metamodels on varying tool configurations for a given clinch joining task. AU - Zirngibl, Christoph AU - Schleich, Benjamin AU - Wartzack, Sandro ID - 34417 IS - 4 JF - AI KW - Industrial and Manufacturing Engineering SN - 2673-2688 TI - Estimation of Clinch Joint Characteristics Based on Limited Input Data Using Pre-Trained Metamodels VL - 3 ER - TY - CHAP AU - Harmening, Anda-Lisa Martha Josephine Anna ID - 33186 T2 - Sonderausgabe des Jahrbuchs für internationale Germanistik 2022 TI - Das Leben nehmen oder den Tod geben – Selbstbestimmtes Sterben auf der Schwelle von Utopie zur Realität? ER - TY - BOOK ED - Harmening, Anda-Lisa Martha Josephine Anna ED - Leinfellner, Stefanie ED - Meier, Rebecca ID - 34450 SN - 978-3-534-27585-4 TI - Wissenstransfer als Aufgabe, Herausforderung und Chance kulturwissenschaftlicher Forschung VL - 1 ER - TY - BOOK ED - Tönnies, Merle ED - Voigts, Eckart ID - 34453 TI - Twenty-First Century Anxieties: Dys/Utopian Spaces and Contexts in Contemporary British Theatre VL - 32 ER - TY - JOUR AU - Tönnies, Merle AU - Flotmann-Scholz, Christina ID - 34452 IS - 2 JF - Anglistik: International Journal of English Studies TI - Directing Pandemic Attention: Dystopian Corona Narratives and the Nation in British Media and Politics VL - 33 ER - TY - JOUR AU - Tönnies, Merle AU - Voigts, Eckart ID - 34454 JF - Twenty-First Century Anxieties: Dys/Utopian Spaces and Contexts in Contemporary British Theatre (CDE Studies) TI - Anger, Anxiety and Hope: The Complicit Realities and Engaged/ing Communities of Contemporary Briitsh Dys/Utopian Theatre VL - 32 ER - TY - CHAP AU - Lütje-Klose , Birgit AU - Grüter, Sandra AU - Neumann, Phillip AU - Weber, Antonia AU - Goldan, Janka AU - Gorges, Julia AU - Wild, Elke ED - Lutz, Deborah ED - Becker, Jonas ED - Buchhaupt, Felix ED - Katzenbach, Dieter ED - Strecker, Alicia ED - Urban, Michael ID - 34467 SN - 978-3-8309-4514-7 T2 - Qualifizierung für Inklusion. Sekundarstufe TI - Weil wir tatsächlich nicht voneinander wussten, was jeder Einzelne so an verborgenen Schätzen bringt VL - 3 ER - TY - CONF AU - laeim, Huddad AU - Schlickriede, Christian AU - Chaisakul, Papichaya AU - Chattham, Nattaporn AU - Panitchakan, Hathai AU - Siangchaew, Krisda AU - Zentgraf, Thomas AU - Pattanaporhratana, Apichart ED - Engheta, Nader ED - Noginov, Mikhail A. ED - Zheludev, Nikolay I. ID - 34465 T2 - Metamaterials, Metadevices, and Metasystems 2022 TI - Design and investigation of a metalens for efficiency enhancement of laser-waveguide coupling in a limited space system ER - TY - JOUR AB - Abstract Background The outcome after ACL reconstruction (ACLR) is in general disappointing with unacceptable number of athletes that do not return to pre-injury level of sports, high re-injury rates, early development of osteoarthritis and shorter careers. Athletes after ACLR have high expectation to return to sports which is in contrast with the current outcomes. The aim of this manuscript is to present an overview of factors that are needed to be incorporated and to personalize the rehabilitation process for an athlete who has undergone an ACLR. Level of evidence 4. AU - Gokeler, Alli AU - Grassi, Alberto AU - Hoogeslag, Roy AU - van Houten, Albert AU - Bolling, Caroline AU - Buckthorpe, Matthew AU - Norte, Grant AU - Benjaminse, Anne AU - Heuvelmans, Pieter AU - Di Paolo, Stefano AU - Tak, Igor AU - Villa, Francesco Della ID - 32578 IS - 1 JF - Journal of Experimental Orthopaedics KW - Orthopedics and Sports Medicine SN - 2197-1153 TI - Return to sports after ACL injury 5 years from now: 10 things we must do VL - 9 ER - TY - JOUR AU - Scharfen, Hans-Erik AU - Lehmann, Tim AU - Büchel, Daniel AU - Baumeister, Jochen ID - 32361 JF - Psychology of Sport and Exercise KW - Applied Psychology SN - 1469-0292 TI - Cortical responses to sport-specific stimuli in a standing stop signal task ER - TY - JOUR AU - Di Paolo, Stefano AU - Nijmeijer, Eline AU - Bragonzoni, Laura AU - Dingshoff, Evelien AU - Gokeler, Alli AU - Benjaminse, Anne ID - 32449 JF - European Journal of Sport Science KW - Orthopedics and Sports Medicine KW - Physical Therapy KW - Sports Therapy and Rehabilitation KW - General Medicine SN - 1746-1391 TI - Comparing lab and field agility kinematics in young talented female football players: Implications for ACL injury prevention ER - TY - JOUR AB - Abstract Background The outcome after ACL reconstruction (ACLR) is in general disappointing with unacceptable number of athletes that do not return to pre-injury level of sports, high re-injury rates, early development of osteoarthritis and shorter careers. Athletes after ACLR have high expectation to return to sports which is in contrast with the current outcomes. The aim of this manuscript is to present an overview of factors that are needed to be incorporated and to personalize the rehabilitation process for an athlete who has undergone an ACLR. Level of evidence 4. AU - Gokeler, Alli AU - Grassi, Alberto AU - Hoogeslag, Roy AU - van Houten, Albert AU - Lehman, Tim AU - Bolling, Caroline AU - Buckthorpe, Matthew AU - Norte, Grant AU - Benjaminse, Anne AU - Heuvelmans, Pieter AU - Di Paolo, Stefano AU - Tak, Igor AU - Villa, Francesco Della ID - 34478 IS - 1 JF - Journal of Experimental Orthopaedics KW - Orthopedics and Sports Medicine SN - 2197-1153 TI - Return to sports after ACL injury 5 years from now: 10 things we must do VL - 9 ER - TY - JOUR AU - Gokeler, Alli AU - Grassi, Alberto AU - Hoogeslag, Roy AU - van Houten, Albert AU - Lehman, Tim AU - Bolling, Caroline AU - Buckthorpe, Matthew AU - Norte, Grant AU - Benjaminse, Anne AU - Heuvelmans, Pieter AU - Di Paolo, Stefano AU - Tak, Igor AU - Villa, Francesco Della ID - 34477 IS - 1 JF - Journal of Experimental Orthopaedics KW - Orthopedics and Sports Medicine SN - 2197-1153 TI - Correction: Return to sports after ACL injury 5 years from now: 10 things we must do VL - 9 ER - TY - JOUR AU - Di Paolo, Stefano AU - Nijmeijer, Eline AU - Bragonzoni, Laura AU - Dingshoff, Evelien AU - Gokeler, Alli AU - Benjaminse, Anne ID - 34475 JF - European Journal of Sport Science KW - Orthopedics and Sports Medicine KW - Physical Therapy KW - Sports Therapy and Rehabilitation KW - General Medicine SN - 1746-1391 TI - Comparing lab and field agility kinematics in young talented female football players: Implications for ACL injury prevention ER - TY - CHAP AU - Wolters, Dennis AU - Engels, Gregor ED - Taibi, Davide ED - Kuhrmann, Marco ED - Mikkonen, Tommi ED - Klünder, Jil ED - Abrahamsson, Pekka ID - 34292 SN - 0302-9743 T2 - Product-Focused Software Process Improvement TI - Towards Situational Process Management for Professional Education Programmes VL - 13709 ER - TY - CONF AB - This report presents the results of a friendly competition for formal verification and policy synthesis of stochastic models. It also introduces new benchmarks and their properties within this category and recommends next steps for this category towards next year’s edition of the competition. In comparison with tools on non-probabilistic models, the tools for stochastic models are at the early stages of development that do not allow full competition on a standard set of benchmarks. We report on an initiative to collect a set of minimal benchmarks that all such tools can run, thus facilitating the comparison between efficiency of the implemented techniques. The friendly competition took place as part of the workshop Applied Verification for Continuous and Hybrid Systems (ARCH) in Summer 2022. AU - Abate, Alessandro AU - Blom, Henk AU - Delicaris, Joanna AU - Haesaert, Sofie AU - Hartmanns, Arnd AU - van Huijgevoort, Birgit AU - Lavaei, Abolfazl AU - Ma, Hao AU - Niehage, Mathis AU - Remke, Anne AU - Schön, Oliver AU - Schupp, Stefan AU - Soudjani, Sadegh AU - Willemsen, Lisa ID - 34532 SN - 2398-7340 T2 - EPiC Series in Computing TI - ARCH-COMP22 Category Report: Stochastic Models ER - TY - JOUR AU - Brosch, Anian AU - Wallscheid, Oliver AU - Böcker, Joachim ID - 34533 JF - IEEE Transactions on Power Electronics KW - Electrical and Electronic Engineering TI - Model Predictive Torque Control for Permanent Magnet Synchronous Motors Using a Stator-Fixed Harmonic Flux Reference Generator in the Entire Modulation Range ER - TY - GEN AB - While trade-offs between modeling effort and model accuracy remain a major concern with system identification, resorting to data-driven methods often leads to a complete disregard for physical plausibility. To address this issue, we propose a physics-guided hybrid approach for modeling non-autonomous systems under control. Starting from a traditional physics-based model, this is extended by a recurrent neural network and trained using a sophisticated multi-objective strategy yielding physically plausible models. While purely data-driven methods fail to produce satisfying results, experiments conducted on real data reveal substantial accuracy improvements by our approach compared to a physics-based model. AU - Schön, Oliver AU - Götte, Ricarda-Samantha AU - Timmermann, Julia ID - 34524 T2 - arXiv:2204.12972 TI - Multi-Objective Physics-Guided Recurrent Neural Networks for Identifying Non-Autonomous Dynamical Systems ER - TY - GEN AB - This paper addresses the problem of computing controllers that are correct by design for safety-critical systems and can provably satisfy (complex) functional requirements. We develop new methods for models of systems subject to both stochastic and parametric uncertainties. We provide for the first time novel simulation relations for enabling correct-by-design control refinement, that are founded on coupling uncertainties of stochastic systems via sub-probability measures. Such new relations are essential for constructing abstract models that are related to not only one model but to a set of parameterized models. We provide theoretical results for establishing this new class of relations and the associated closeness guarantees for both linear and nonlinear parametric systems with additive Gaussian uncertainty. The results are demonstrated on a linear model and the nonlinear model of the Van der Pol Oscillator. AU - Schön, Oliver AU - Huijgevoort, Birgit van AU - Haesaert, Sofie AU - Soudjani, Sadegh ID - 34530 T2 - arXiv:2210.08269 TI - Correct-by-Design Control of Parametric Stochastic Systems ER - TY - CONF AU - Campagner, Andrea AU - Lienen, Julian AU - Hüllermeier, Eyke AU - Ciucci, Davide ID - 34542 T2 - Lecture Notes in Computer Science TI - Scikit-Weak: A Python Library for Weakly Supervised Machine Learning VL - 13633 ER - TY - GEN AU - Schönhärl, Korinna ID - 34549 IS - 11 T2 - Sehepunkte TI - Review on: Daniel Benedikt Stienen: Verkauftes Vaterland VL - 22 ER - TY - GEN AU - Schönhärl, Korinna ID - 34554 T2 - HSozKult TI - Review on: Sven Steinmo: Willing to Pay? A Reasonable Choice Approach ER - TY - JOUR AB - Mit steigenden Optimierungsanforderungen an das Individuum wächst auch das indivi- duelle Bedürfnis nach Kontrolle. Dieses kann u. a. durch self tracking-Technologien erfüllt werden. Anhand von drei Fallbeispielen – der Personenwaage, dem Wearable und dem habit tracker – zeigt dieser Aufsatz, wie sich medienbasierte Selbsttechnologien im historischen Verlauf intensiviert und stärker in den Alltag integriert haben. Ein besonderer Fokus liegt dabei auf der Ambivalenz dieser Medien: Ermöglichen sie auf der einen Seite zwar eine Selbstkontrolle und stellen so potenziell sta- bilisierende Ressourcen für das Individuum dar, schaffen sie auf der anderen Seite auch neue Anforderungen, die es zu erfüllen gilt. AU - Schloots, Franziska Margarete ID - 34614 IS - 7 JF - ffk Journal KW - self-tracking KW - Selbsttechnologien KW - Wearable KW - Bullet Journal KW - Personenwaage KW - Selbstvermessung TI - ‚Understand what’s happening within‘. Selbstkontrolle mit Personenwaage, Wearable und habit tracker VL - 6 ER - TY - GEN AB - In this article, we show how second-order derivative information can be incorporated into gradient sampling methods for nonsmooth optimization. The second-order information we consider is essentially the set of coefficients of all second-order Taylor expansions of the objective in a closed ball around a given point. Based on this concept, we define a model of the objective as the maximum of these Taylor expansions. Iteratively minimizing this model (constrained to the closed ball) results in a simple descent method, for which we prove convergence to minimal points in case the objective is convex. To obtain an implementable method, we construct an approximation scheme for the second-order information based on sampling objective values, gradients and Hessian matrices at finitely many points. Using a set of test problems, we compare the resulting method to five other available solvers. Considering the number of function evaluations, the results suggest that the method we propose is superior to the standard gradient sampling method, and competitive compared to other methods. AU - Gebken, Bennet ID - 34618 T2 - arXiv:2210.04579 TI - Using second-order information in gradient sampling methods for nonsmooth optimization ER - TY - JOUR AU - Dreher, Yannik AU - Fichtler, Julius AU - Karfusehr, Christoph AU - Jahnke, Kevin AU - Xin, Yang AU - Keller, Adrian AU - Göpfrich, Kerstin ID - 33446 JF - Biophysical Journal KW - Biophysics SN - 0006-3495 TI - Genotype-phenotype mapping with polyominos made from DNA origami tiles VL - 121 ER - TY - JOUR AB - AbstractThe influence of ultra-thin SiOx plasma deposited films on the corrosion resistance of adhesive films on a laser surface melted 7075 aluminium alloy was investigated by means of complementary techniques in comparison to the just laser surface melted state. Laser surface melting (LSM) was performed using a continuous wave mode at a wavelength of 1064 nm. Ultra-thin plasma polymer films were deposited from a mixture of hexamethyldisilane (HMDSO), oxygen, and argon by means of an audio-frequency glow discharge. The surface morphology and surface chemistry compositions were investigated by employing field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), diffuse reflection infrared Fourier transform spectroscopy, and X-ray photoelectron spectroscopy. The corrosion resistance of plasma polymer coated LSM Al-7075 alloy was studied using linear sweep voltammetry and electrochemical impedance spectroscopy in a chloride-containing electrolyte. The electrochemical studies showed an improved corrosion resistance for plasma film-coated alloys compared to the just laser surface melted state. To study the corresponding surface adhesive properties, the samples were coated with an epoxy amine adhesive. 90°-peel test under humid conditions confirmed the improvement of interfacial wet-adhesion corrosion tests showed a strong improvement of the delamination resistance of adhesives caused by the ultra-thin interfacial SiOx-films. AU - Varghese, J. AU - Vieth, P. AU - Xie, X. AU - Grundmeier, Guido ID - 34642 IS - 1 JF - SN Applied Sciences KW - General Earth and Planetary Sciences KW - General Physics and Astronomy KW - General Engineering KW - General Environmental Science KW - General Materials Science KW - General Chemical Engineering SN - 2523-3963 TI - Enhanced corrosion resistance of epoxy-films on ultra-thin SiOx PECVD film coated laser surface melted Al-alloys VL - 5 ER - TY - JOUR AU - Hoppe, Christian AU - Mitschker, Felix AU - Mai, Lukas AU - Liedke, Maciej Oskar AU - Arcos, Teresa AU - Awakowicz, Peter AU - Devi, Anjana AU - Attallah, Ahmed Gamal AU - Butterling, Maik AU - Wagner, Andreas AU - Grundmeier, Guido ID - 34648 IS - 4 JF - Plasma Processes and Polymers KW - Polymers and Plastics KW - Condensed Matter Physics SN - 1612-8850 TI - Influence of surface activation on the microporosity of PE‐CVD and PE‐ALD SiO x thin films on PDMS VL - 19 ER - TY - JOUR AU - Bürger, Julius AU - Venugopal, Harikrishnan AU - Kool, Daniel AU - de los Arcos, Teresa AU - Gonzalez Orive, Alejandro AU - Grundmeier, Guido AU - Brassat, Katharina AU - Lindner, Jörg K.N. ID - 34651 IS - 26 JF - Advanced Materials Interfaces KW - General Medicine SN - 2196-7350 TI - High‐Resolution Study of Changes in Morphology and Chemistry of Cylindrical PS‐ b ‐PMMA Block Copolymer Nanomasks during Mask Development VL - 9 ER - TY - JOUR AU - Neßlinger, Vanessa AU - Orive, Alejandro G. AU - Meinderink, Dennis AU - Grundmeier, Guido ID - 34649 JF - Journal of Colloid and Interface Science KW - Colloid and Surface Chemistry KW - Surfaces KW - Coatings and Films KW - Biomaterials KW - Electronic KW - Optical and Magnetic Materials SN - 0021-9797 TI - Combined in-situ attenuated total reflection-Fourier transform infrared spectroscopy and single molecule force studies of poly(acrylic acid) at electrolyte/oxide interfaces at acidic pH VL - 615 ER - TY - JOUR AU - Xie, Xiaofan AU - de los Arcos, Teresa AU - Grundmeier, Guido ID - 34650 IS - 11 JF - Plasma Processes and Polymers KW - Polymers and Plastics KW - Condensed Matter Physics SN - 1612-8850 TI - Comparative analysis of hexamethyldisiloxane and hexamethyldisilazane plasma polymer thin films before and after plasma oxidation VL - 19 ER - TY - CONF AU - Behrent, Sigrid ED - Klepper-Pang, Almut ED - Bahr, Andreas ID - 34419 IS - 54 T2 - Sprachen. Politik. Sprachenpolitik. Der Beitrag der Sprachenzentren zur Hochschule der Zukunft. Dokumentation der 31. Arbeitstagung vom 5.-7. März 2020 an der Europa-Universität Viadrina in Frankfurt (Oder) TI - Mentoring-Programm zur Einarbeitung neuer Lehrbeauftragter. Format, Inhalte und Evaluationsergebnisse. ER - TY - GEN AU - Schöppner, Volker AU - Gevers, Karina AU - Schraa, L. AU - Töws, P. ID - 34723 SN - 1864-3450 T2 - Joining Plastics TI - Auswirkungen unterschiedlicher Erwärmstrategien auf die quasistatische und zyklische Belastbarkeit von infrarotgeschweißten, glasfaserverstärkten Thermoplastbauteilen ER - TY - CONF AU - Schöppner, Volker AU - Brüning, Florian AU - Sommer, L. ID - 34717 TI - A Reverse Engineering Approach for Calibrating Frictional Behavior of Contact Models for Numerical Simulation of Solids Conveying in Extruders ER - TY - GEN AU - Schöppner, Volker AU - Kleinschmidt, Dennis AU - Nillius, U. AU - Hopmann, C. ID - 34722 T2 - GAK TI - Auswirkungen des Vorscherungseinflusses im Extrusionsprozess auf die rheologischen Kennwerte gefüllter Kautschukmischungen ER - TY - GEN AU - Schöppner, Volker AU - Dörner, Marius AU - Frank, Maximilian AU - Schall, Christoph Wilhelm Theodor ID - 34721 T2 - Kunststoffe TI - Auf der Welle zum Mischerfolg ER - TY - GEN AU - Moritzer, Elmar AU - Scholle, Maximilian ID - 34724 TI - BMC-Spritzgießen bricht die Glasfaser ER - TY - GEN AU - Moritzer, Elmar AU - Scholle, Maximilian AU - Tölle, Lisa AU - Bomm, J. ID - 34732 SN - 1863-7116 T2 - RFP Rubber Fibres Plastics TI - Influence of process parameter on fiber quality during fiber recycling through thermal fiber recovery ER - TY - GEN AU - Moritzer, Elmar AU - Scholle, Maximilian AU - Tölle, Lisa AU - Bomm, J. ID - 34729 T2 - GAK - Gummi Fasern Kunststoffe TI - Einfluss der Prozessführung auf die Faserqualität beim Faserrecycling mittels thermischer Faserrückgewinnung ER - TY - CONF AU - Schöppner, Volker AU - Kleinschmidt, Dennis ID - 34730 TI - Estimation and correction of non-isothermal effects of carbon black-filled rubber compounds in viscosity measurements ER - TY - CONF AU - Moritzer, Elmar AU - Richters, Maximilian ID - 34731 TI - Filling and Flow Behavior of Novel Wood-Filled Thermoplastic Elastomers ER - TY - CONF AU - Schöppner, Volker AU - Kleinschmidt, Dennis AU - Hopmann, C. AU - Limper, A. AU - Fey, F. AU - Facklam, M. AU - Schön, M. ID - 34738 TI - Investigations on the Influence of Viscoelasticity on the Swell Behaviour and Flow Instabilities of Carbon Black-Filled Rubber Compounds ER - TY - CONF AU - Schöppner, Volker AU - Brüning, Florian ID - 34735 TI - Investigating Different Methods for Numerical Simulation of Temperature Development in a Feed Section of a Single-Screw Extruder ER - TY - CONF AU - Schöppner, Volker AU - Köllermeier, Jonas ID - 34734 TI - Integration of IR Based Inline Measurement Systems of the Surface Temperature of Square Hollow Profiles in an Extrusion Process ER - TY - CONF AU - Schöppner, Volker AU - Frank, Maximilian ID - 34737 TI - Investigation of the Pressure-Throughput Behavior of Different Spiral Shearing Sections on an Analytical and Simulative Basis ER - TY - CONF AU - Schöppner, Volker AU - Altepeter, Matthias AU - Wanke, S. ID - 34740 TI - Modelling of the material degradation of polypropylene on the co-rotating twin-screw extruder ER - TY - GEN AU - Schöppner, Volker AU - Kleinschmidt, Dennis AU - Nillius, U. AU - Hopmann, C. ID - 34752 T2 - GAK TI - Weiterentwicklung eines Verfahrens zur Korrektur von Wandgleiteffekten im Rahmen rheologischer Messungen an gefüllten Kautschukmischungen ER - TY - GEN AU - Moritzer, Elmar AU - Kröker, M. AU - Scholle, Maximilian ID - 34741 SN - 2699-4534 TI - Rückführung zerkleinerter Organobleche ER -