TY - JOUR AU - Castenow, Jannik AU - Kling, Peter AU - Knollmann, Till AU - Meyer auf der Heide, Friedhelm ID - 29843 JF - Information and Computation KW - Computational Theory and Mathematics KW - Computer Science Applications KW - Information Systems KW - Theoretical Computer Science SN - 0890-5401 TI - A Discrete and Continuous Study of the Max-Chain-Formation Problem ER - TY - CONF AU - Fockel, Markus AU - Schubert, David AU - Trentinaglia, Roman AU - Schulz, Hannes AU - Kirmair, Wolfgang ID - 29847 T2 - Proceedings of the 10th International Conference on Model-Driven Engineering and Software Development TI - Semi-automatic Integrated Safety and Security Analysis for Automotive Systems ER - TY - CONF AU - Koch, Thorsten AU - Trippel, Sascha AU - Dziwok, Stefan AU - Bodden, Eric ID - 29844 T2 - Proceedings of the 10th International Conference on Model-Driven Engineering and Software Development TI - Integrating Security Protocols in Scenario-based Requirements Specifications ER - TY - CHAP AU - Albers, Timm AU - Filipiak, Agnes AU - Franzen, Katja AU - Hellmich, Frank ED - Schimek, B ED - Kremsner, G ED - Proyer, M ED - Grubich, R ED - Paudel, F ED - Grubich-Müller, R ID - 26657 T2 - Grenzen.Gänge.Zwischen.Welten. Kontroversen – Entwicklungen – Perspektiven der Inklusionsforschung TI - Kompetenzentwicklung im inklusiven Unterricht (KinU) – eine internationale Perspektive ER - TY - GEN AU - Beule, Felix AU - Teutenberg, Dominik AU - Meschut, Gerson AU - Aubel, Tobias AU - Matzenmiller, Anton ID - 29852 T2 - 22. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Methodenentwicklung zur Versagensanalyse aufgrund der Aushärtung vorgeschädigter Klebverbindungen in stahlintensiven Mischbaustrukturen ER - TY - CONF AU - Carillo Beber, Vinicius AU - Nagel, Christof AU - Mayer, Bernd AU - Köster, Christian AU - Matzenmiller, Anton AU - Hecht, Matthias AU - Baumgartner, Jörg AU - Melz, Tobias AU - Tews, Karina AU - Çavdar, Serkan AU - Meschut, Gerson ID - 29855 T2 - 22. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden ER - TY - GEN AU - Lanza, Lukas Johannes AU - Berger, Thomas ID - 29835 TI - Funnel control of linear systems under output measurement losses ER - TY - THES AU - Schneider, Stefan Balthasar ID - 29672 TI - Network and Service Coordination: Conventional and Machine Learning Approaches" ER - TY - CONF AB - Cyber-physical systems generate and collect huge amounts of usage data during operation. Analyzing these data may enable manufacturing companies to identify weaknesses and learn about the users of their products. Such insights are valuable in the early phases of product development like product planning, as they facilitate decision-making for product improvement. The analysis and exploitation of usage data in product planning, however, is a new task for manufacturing companies. To reduce mistakes and improve the results, companies should build upon a suitable reference process model. Unfortunately, established models for analyzing data cannot be easily applied for product planning. In this paper, we propose a reference process model for usage data-driven product planning. It builds on three well-established models for analyzing data and addresses the unique characteristics of usage data-driven product planning. Finally, we customize the model for a manufacturing company and demonstrate how it could be implemented in practice. AU - Meyer, Maurice AU - Wiederkehr, Ingrid AU - Panzner, Melina AU - Koldewey, Christian AU - Dumitrescu, Roman ID - 29380 T2 - Proceedings of the 55th Hawaii International Conference on System Sciences TI - A Reference Process Model for Usage Data-Driven Product Planning ER - TY - CONF AU - Yigitbas, Enes AU - Karakaya, Kadiray AU - Jovanovikj, Ivan AU - Engels, Gregor ED - Grunske, Lars ED - Siegmund, Janet ED - Vogelsang, Andreas ID - 29927 T2 - Software Engineering 2022, Fachtagung des GI-Fachbereichs Softwaretechnik, 21.-25. Februar 2022, Virtuell TI - Enhancing Human-in-the-Loop Adaptive Systems through Digital Twins and VR Interfaces VL - {P-320} ER - TY - CONF AU - Yigitbas, Enes AU - Gorissen, Simon AU - Weidmann, Nils AU - Engels, Gregor ED - Grunske, Lars ED - Siegmund, Janet ED - Vogelsang, Andreas ID - 29926 T2 - Software Engineering 2022, Fachtagung des GI-Fachbereichs Softwaretechnik, 21.-25. Februar 2022, Virtuell TI - Collaborative Software Modeling in Virtual Reality VL - {P-320} ER - TY - CONF AU - Witschen, Linus Matthias AU - Wiersema, Tobias AU - Reuter, Lucas David AU - Platzner, Marco ID - 29945 T2 - 2022 59th ACM/IEEE Design Automation Conference (DAC) TI - Search Space Characterization for Approximate Logic Synthesis ER - TY - CONF AU - Witschen, Linus Matthias AU - Wiersema, Tobias AU - Artmann, Matthias AU - Platzner, Marco ID - 29865 T2 - Design, Automation and Test in Europe (DATE) TI - MUSCAT: MUS-based Circuit Approximation Technique ER - TY - GEN AB - We extend a recent result in high-gain feedback output tracking control to achieve exact tracking within finite time, i.e., the output of a system and its relevant derivatives have certain exact values at a predefined finite time. We propose a new funnel control scheme achieving this, whereas the error between the reference and the output evolves within prescribed bounds. Applications of this are, for instance, linking up two parts of a train, or docking spaceships. AU - Lanza, Lukas Johannes ID - 29952 TI - Exact output tracking in prescribed finite time via funnel control ER - TY - CONF AU - Kowatz, Jannik AU - Teutenberg, Dominik AU - Meschut, Gerson ID - 29344 T2 - 22. Kolloquium Gemeinsame Forschung in der Klebtechnik TI - Weiterentwicklung der induktiven Schnellhärtung von Klebverbindungen für robuste Fertigungsprozesse unter Berücksichtigung von serienrelevanten Einflussfaktoren ER - TY - CONF AU - Chudalla, Nick AU - Meschut, Gerson AU - Bartley, Aurélie AU - Wibbeke, Tim Michael ID - 30003 T2 - 22. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Analyse des Versagensverhaltens geklebter Stahl-Verbindungen beim werkstoffschonenden Entfügen in der Karosserieinstandsetzung ER - TY - JOUR AB - The growing demand for bandwidth and energy efficiency requires new solutions for signal detection and processing. We demonstrate a concept for high-bandwidth signal detection with low-speed photodetectors and electronics. The method is based on the parallel optical sampling of a high-bandwidth signal with sinc-pulse sequences provided by a Mach-Zehnder modulator. For the electronic detection and processing this parallel sampling enables to divide the high-bandwidth optical signal with the bandwidth B into N electrical signals with the baseband bandwidth of B/(2N) . In proof-of-concept experiments with N=3 , we present the detection of 24 GHz optical signals by detectors with a bandwidth of only 4 GHz. For ideal components, the sampling and bandwidth down-conversion does not add an excess error to the signals and even for the non-ideal components of our proof-of-concept setup, it is below 1%. Thus, the rms error for the measurement of the 24 GHz signal was reduced by a factor of about 3.4 and the effective number of bits were increased by 1.8. AU - Meier, Janosch AU - Singh, Karanveer AU - Misra, Arijit AU - Preussler, Stefan AU - Scheytt, Christoph AU - Schneider, Thomas ID - 30012 JF - IEEE Photonics Journal TI - High-Bandwidth Arbitrary Signal Detection Using Low-Speed Electronics VL - 14 ER - TY - JOUR AB - In this paper, the theory of phase-locking of a microwave oscillator on the interharmonics, i.e. non-integer harmonics, of the repetition rate of the optical pulse train of a mode-locked laser (MLL) is developed. A balanced optical microwave phase detector (BOMPD) is implemented using a balanced Mach-Zehnder modulator and is employed to discriminate the phase difference between the envelope of the optical pulses and the microwave oscillator. It is shown mathematically that the inherent nonlinear properties of BOMPD with respect to the microwave excitation amplitude can be used for interharmonic locking. The characteristic functions of the phase detector for interharmonic locking are derived analytically and are compared with the measurement results. An opto-electronic phase-locked loop (OEPLL) is demonstrated whose output frequency locks on interharmonics of the MLL repetition rate when an appropriate modulator bias and sufficient RF amplitude are applied. Thus, for the first time theory and experiment of reliable locking on interharmonics of the repetition rate of a MLL are presented. AU - Bahmanian, Meysam AU - Kress, Christian AU - Scheytt, Christoph ID - 30011 JF - Optics Express TI - Locking of microwave oscillators on the interharmonics of mode-locked laser signals VL - 14 ER - TY - BOOK AU - Rossel, Moritz Sebastian AU - Meschut, Gerson ID - 30102 SN - 978-3-86776-631-9 TI - Methodenentwicklung für die Simulation mechanischer Fügeprozesse mit besonderer Berücksichtigung fügespezifischer Reibverhältnisse VL - 573 ER - TY - GEN AU - Roopa, Rajanna ID - 30152 TI - Evaluation of Algorithms for the Node Capacitated Clique ER - TY - JOUR AB - Metasurfaces provide applications for a variety of flat elements and devices due to the ability to modulate light with subwavelength structures. The working principle meanwhile gives rise to the crucial problem and challenge to protect the metasurface from dust or clean the unavoidable contaminants during daily usage. Here, taking advantage of the intelligent bioinspired surfaces which exhibit self-cleaning properties, a versatile dielectric metasurface benefiting from the obtained superhydrophilic or quasi-superhydrophobic states is shown. The design is realized by embedding the metasurface inside a large area of wettability supporting structures, which is highly efficient in fabrication, and achieves both optical and wettability functionality at the same time. The superhydrophilic state enables an enhanced optical response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated between these two wettability or functional states by appropriate treatments in a repeatable way, without degrading the optical performance. The proposed design strategy will bring new opportunities to smart metasurfaces with improved optical performance, versatility, and physical stability. AU - Lu, Jinlong AU - Sain, Basudeb AU - Georgi, Philip AU - Protte, Maximilian AU - Bartley, Tim AU - Zentgraf, Thomas ID - 26747 IS - 1 JF - Advanced Optical Materials SN - 2195-1071 TI - A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response VL - 10 ER - TY - GEN AU - Korzeczek, Sebastian ID - 30198 TI - Aufarbeitung und lmplementierung von DAG-Rider ER - TY - GEN AU - Nachtigall, Marcel ID - 30199 TI - Hybrid Routing in Three Dimensions ER - TY - JOUR AB - DNA origami technology enables the folding of DNA strands into complex nanoscale shapes whose properties and interactions with molecular species often deviate significantly from that of genomic DNA. Here, we investigate the salting-out of different DNA origami shapes by the kosmotropic salt ammonium sulfate that is routinely employed in protein precipitation. We find that centrifugation in the presence of 3 M ammonium sulfate results in notable precipitation of DNA origami nanostructures but not of double-stranded genomic DNA. The precipitated DNA origami nanostructures can be resuspended in ammonium sulfate-free buffer without apparent formation of aggregates or loss of structural integrity. Even though quasi-1D six-helix bundle DNA origami are slightly less susceptible toward salting-out than more compact DNA origami triangles and 24-helix bundles, precipitation and recovery yields appear to be mostly independent of DNA origami shape and superstructure. Exploiting the specificity of ammonium sulfate salting-out for DNA origami nanostructures, we further apply this method to separate DNA origami triangles from genomic DNA fragments in a complex mixture. Our results thus demonstrate the possibility of concentrating and purifying DNA origami nanostructures by ammonium sulfate-induced salting-out. AU - Hanke, Marcel AU - Hansen, Niklas AU - Chen, Ruiping AU - Grundmeier, Guido AU - Fahmy, Karim AU - Keller, Adrian ID - 30209 IS - 5 JF - International Journal of Molecular Sciences KW - Inorganic Chemistry KW - Organic Chemistry KW - Physical and Theoretical Chemistry KW - Computer Science Applications KW - Spectroscopy KW - Molecular Biology KW - General Medicine KW - Catalysis SN - 1422-0067 TI - Salting-Out of DNA Origami Nanostructures by Ammonium Sulfate VL - 23 ER - TY - GEN AU - Striewe, Marius AU - Meschut, Gerson AU - Schmelzle, Lars AU - Mergheim, Julia AU - Possart, Gunnar AU - Steinmann, Paul ID - 30222 T2 - 22. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Experimentelle und numerische Untersuchung des Einflusses variabler Betriebstemperaturen auf das Trag- und Versagensverhalten struktureller Klebverbindungen unter Crashbelastung ER - TY - GEN AU - Klippstein, Sven Helge ID - 30229 TI - Reproducibility in Polymer Laser Sintering ER - TY - CONF AB - Recent reinforcement learning approaches for continuous control in wireless mobile networks have shown impressive results. But due to the lack of open and compatible simulators, authors typically create their own simulation environments for training and evaluation. This is cumbersome and time-consuming for authors and limits reproducibility and comparability, ultimately impeding progress in the field. To this end, we propose mobile-env, a simple and open platform for training, evaluating, and comparing reinforcement learning and conventional approaches for continuous control in mobile wireless networks. mobile-env is lightweight and implements the common OpenAI Gym interface and additional wrappers, which allows connecting virtually any single-agent or multi-agent reinforcement learning framework to the environment. While mobile-env provides sensible default values and can be used out of the box, it also has many configuration options and is easy to extend. We therefore believe mobile-env to be a valuable platform for driving meaningful progress in autonomous coordination of wireless mobile networks. AU - Schneider, Stefan Balthasar AU - Werner, Stefan AU - Khalili, Ramin AU - Hecker, Artur AU - Karl, Holger ID - 30236 KW - wireless mobile networks KW - network management KW - continuous control KW - cognitive networks KW - autonomous coordination KW - reinforcement learning KW - gym environment KW - simulation KW - open source T2 - IEEE/IFIP Network Operations and Management Symposium (NOMS) TI - mobile-env: An Open Platform for Reinforcement Learning in Wireless Mobile Networks ER - TY - THES AU - Fanasch, Patrizia ID - 30201 TI - Governance and Reputation in the Market for Experience Goods ER - TY - BOOK AB - The volume comprises a variety of research approaches that seek to explore and understand employees’ learning and development through and for work. Working life reveals challenges through technological, economic and societal development that can only rudimentarily be addressed by formal education and training. Workplace learning becomes more and more important for employees and enterprises to successfully cope with these challenges. Workplace learning is a steadily growing field of educational research but it lacks so far a scholastic canon – there is rather a diversity of research approaches. This volume reflects this diversity by bringing together researchers from different countries and different theoretical backgrounds, presenting their current research on topics that all are relevant for understanding presages, processes and outcomes of workplace learning. Hence, this volume is of relevance for researchers as well as practitioners in the field and policy makers. ED - Harteis, Christian ED - Gijbels, David ED - Kyndt, Eva ID - 30291 KW - tivesTeam learningTeam climateSocial influences on team learningKnowledge construction in teamsLearning cultureAcknowledgement of competencesTechnology and professional learningCreation of a learning eco-systemDiversity as a challenge for organisationsHigher education as preparation for WPLSocial support in networks and professional learningvocational and professional education SN - 2210-5549 TI - Research Approaches on Workplace Learning ER - TY - CHAP AB - Multiobjective optimization plays an increasingly important role in modern applications, where several objectives are often of equal importance. The task in multiobjective optimization and multiobjective optimal control is therefore to compute the set of optimal compromises (the Pareto set) between the conflicting objectives. Since the Pareto set generally consists of an infinite number of solutions, the computational effort can quickly become challenging which is particularly problematic when the objectives are costly to evaluate as is the case for models governed by partial differential equations (PDEs). To decrease the numerical effort to an affordable amount, surrogate models can be used to replace the expensive PDE evaluations. Existing multiobjective optimization methods using model reduction are limited either to low parameter dimensions or to few (ideally two) objectives. In this article, we present a combination of the reduced basis model reduction method with a continuation approach using inexact gradients. The resulting approach can handle an arbitrary number of objectives while yielding a significant reduction in computing time. AU - Banholzer, Stefan AU - Gebken, Bennet AU - Dellnitz, Michael AU - Peitz, Sebastian AU - Volkwein, Stefan ED - Michael, Hintermüller ED - Roland, Herzog ED - Christian, Kanzow ED - Michael, Ulbrich ED - Stefan, Ulbrich ID - 16296 SN - 978-3-030-79392-0 T2 - Non-Smooth and Complementarity-Based Distributed Parameter Systems TI - ROM-Based Multiobjective Optimization of Elliptic PDEs via Numerical Continuation ER - TY - CHAP AB - With the ever increasing capabilities of sensors and controllers, autonomous driving is quickly becoming a reality. This disruptive change in the automotive industry poses major challenges for manufacturers as well as suppliers as entirely new design and testing strategies have to be developed to remain competitive. Most importantly, the complexity of autonomously driving vehicles in a complex, uncertain, and safety-critical environment requires new testing procedures to cover the almost infinite range of potential scenarios. AU - Peitz, Sebastian AU - Dellnitz, Michael AU - Bannenberg, Sebastian ED - Bock, H. G. ED - Küfer, K.-H. ED - Maas, P. ED - Milde, A. ED - Schulz, V. ID - 30294 SN - 1612-3956 T2 - German Success Stories in Industrial Mathematics TI - Efficient Virtual Design and Testing of Autonomous Vehicles VL - 35 ER - TY - CHAP AB - This chapter presents a discussion of the concept of agency. Agency is understood as a multifaceted construct describing the idea that human beings make choices, act on these choices, and thereby exercise influence on their own lives as well as their environment. We argue that the concept is discussed from three different perspectives in the literature—transformational, dispositional, and relational—that are each related to learning and development in work contexts. These perspectives do not reflect incompatible positions but rather different aspects of the same phenomena. The chapter also offers an avenue of insight into empirical studies that employ agency as a central concept as well as discussions about concepts that closely overlap with ideas of human beings as agents of power and influence. AU - Goller, Michael AU - Paloniemi, Susanna ID - 30289 KW - Agency Workplace learning Professional development Proactivity Self-direction SN - 2210-5549 T2 - Research Approaches on Workplace Learning TI - Agency: Taking Stock of Workplace Learning Research ER - TY - CHAP AB - The article explores the particular quality of changes introduced through the latest wave of digital transformation of workplaces. It has effects on workflow processes, on distribution of work and tasks, and the mode of distributing working tasks, e.g. through cyber-physical systems. Hence, the changes in work are manifold and require changes in vocational education and training as well as in workplace learning. These changes reveal new challenges for research on workplace learning. Finally, conclusions for future workplace learning research will be developed. AU - Harteis, Christian ID - 30290 KW - Digitalisation Self organisation Distribution of labour Automation SN - 2210-5549 T2 - Research Approaches on Workplace Learning TI - Research on Workplace Learning in Times of Digitalisation ER - TY - CHAP AU - Gräßler, Iris AU - Pottebaum, Jens ED - Krause, Dieter ED - Heyden, Emil ID - 28991 SN - 9783030783679 T2 - Design Methodology for Future Products TI - From Agile Strategic Foresight to Sustainable Mechatronic and Cyber-Physical Systems in Circular Economies ER - TY - GEN AU - Schafmeister, Frank ID - 30347 T2 - International Conference on Electric & Electronic in Hybrid and Electric Vehicles and Electric Energy Management (EEHE), TI - Compensation of LF Common-Mode Noise by the internal DC/DC-Stage for transformerless On-Board Chargers at Three- and Single-Phase Operation ER - TY - CONF AU - Förster, Nikolas AU - Rehlaender, Philipp AU - Wallscheid, Oliver AU - Schafmeister, Frank AU - Böcker, Joachim ID - 30349 T2 - Proc. 37th IEEE Applied Power Electronics Conference (APEC) TI - An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors ER - TY - CONF AU - Keuck, Lukas AU - Schafmeister, Frank AU - Böcker, Joachim ID - 30350 T2 - Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM) TI - Robust Hysteresis Control for LLC Resonant Converters Using a Fully Isolated Measurement Scheme ER - TY - JOUR AB - While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often, symmetry effects are utilized to obtain particular optical responses. By breaking certain spatial symmetries, chiral structures arise and provide robust chiroptical responses to these plasmonic resonances. Here, we observe strong chiroptical responses in the linear and nonlinear optical regime for chiral L-handed helicoid-III nanoparticles and quantify them by means of an asymmetric factor, the so-called g-factor. We calculate the linear optical g-factors for two distinct chiroptical resonances to −0.12 and –0.43 and the nonlinear optical g-factors to −1.45 and −1.63. The results demonstrate that the chirality of the helicoid-III nanoparticles is strongly enhanced in the nonlinear regime. AU - Spreyer, Florian AU - Mun, Jungho AU - Kim, Hyeohn AU - Kim, Ryeong Myeong AU - Nam, Ki Tae AU - Rho, Junsuk AU - Zentgraf, Thomas ID - 30195 IS - 3 JF - ACS Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Biotechnology KW - Electronic KW - Optical and Magnetic Materials SN - 2330-4022 TI - Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles VL - 9 ER - TY - JOUR AB - AbstractTailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles. AU - Jonas, B. AU - Heinze, D. AU - Schöll, E. AU - Kallert, P. AU - Langer, T. AU - Krehs, S. AU - Widhalm, A. AU - Jöns, K. D. AU - Reuter, D. AU - Schumacher, S. AU - Zrenner, Artur ID - 30385 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry SN - 2041-1723 TI - Nonlinear down-conversion in a single quantum dot VL - 13 ER - TY - JOUR AU - Hoyer, Britta AU - van Straaten, Dirk ID - 30341 JF - Journal of Behavioral and Experimental Economics KW - General Social Sciences KW - Economics and Econometrics KW - Applied Psychology SN - 2214-8043 TI - Anonymity and Self-Expression in Online Rating Systems - An Experimental Analysis VL - 98 ER - TY - JOUR AU - Praschan, Tom AU - Heinze, Dirk AU - Breddermann, Dominik AU - Zrenner, Artur AU - Walther, Andrea AU - Schumacher, Stefan ID - 30384 IS - 4 JF - Physical Review B SN - 2469-9950 TI - Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton VL - 105 ER - TY - CONF AB - Resonant evanescent coupling can be utilized to selectively excite orbital angular momentum (OAM) modes of high angular order supported by a thin circular dielectric rod. Our 2.5-D hybrid-analytical coupled mode model combines the vectorial fields associated with the fundamental TE- and TM-modes of a standard silicon photonics slab waveguide, propagating at oblique angles with respect to the rod axis, and the hybrid modes supported by the rod. One observes an efficient resonant interaction in cases where the common axial wavenumber of the waves in the slab matches the propagation constant of one or more modes of the rod. For certain modes of high angular order, the incident wave is able to transfer its directionality to the field in the fiber, exciting effectively only one of a pair of degenerate OAM modes AU - Hammer, Manfred AU - Ebers, Lena AU - Förstner, Jens ED - Andrews, David L. ED - Galvez, Enrique J. ED - Rubinsztein-Dunlop, Halina ID - 30387 KW - tet_topic_waveguide T2 - Complex Light and Optical Forces XVI TI - Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber ER - TY - JOUR AU - Cresson, Jacky AU - Jiménez, Fernando AU - Ober-Blöbaum, Sina ID - 30490 JF - AIMS TI - Continuous and discrete Noether's fractional conserved quantities for restricted calculus of variations VL - 14(1) ER - TY - THES AB - In dieser Arbeit wird die elektromagnetische Wellenausbreitung in integrierten optischen Wellenleitern mit Hilfe von halb analytischen und numerischen Simulationsmethoden untersucht. Im ersten Teil werden 2-D Si/SiO2-Wellenleiterkonfigurationen mit hohem Brechungsindexkontrast betrachtet. Die Strukturen werden mit halb geführten Wellen unter schrägen Ausbreitungswinkeln angeregt. Dadurch kann die Leistungsübertragung zu bestimmten ausgehenden Moden unterdrückt werden, wodurch vollständig verlustfreie Systeme entstehen. Zusätzlich dient die Anregung mit einem seitlich begrenzten, einfallenden Wellenbündel aus halb geführten Wellen dazu, praktisch relevantere 3-D Konfigurationen zu realisieren. Darüber hinaus wird eine schrittweise Winkelspektrum-Methode vorgestellt, die es ermöglicht, in Kombination mit voll vektoriellen 2-D Finite-Elemente-Lösungen für Teilprobleme mit geringerer Komplexität, die Wellenausbreitung in planaren, linsenförmigen Wellenleitern numerisch in drei Raumrichtungen zu berechnen. Im zweiten Teil dieser Arbeit wird die Ausbreitung in Wellenleiterstrukturen aus Lithiumniobat untersucht, welche für quantenoptische Effekte genutzt werden. Zur Detektion einzelner Photonen werden supraleitende Nanodrähte auf eindiffundierten Lithiumniobat Wellenleitern mit zusätzlicher Taperschicht aus Silizium betrachtet. Um die Wellenausbreitung in diesen 3-D Wellenleitern zu beschreiben, wird eine einseitig gerichtete Finite-Elemente „Modal Matching“ Methode eingeführt. Abschließend werden Rippenwellenleiter aus Lithiumniobat analysiert, die auf Siliziumdioxid Plattformen aufgebracht sind. Der Schwerpunkt liegt hier auf dem nichtlinearen „Parametric Down-Conversion“ Prozess, der für die Erzeugung verschränkter Photonen verwendet wird. AU - Ebers, Lena ID - 30722 KW - tet_topic_waveguide TI - Semi-guided waves in integrated optical waveguide structures ER - TY - GEN AB - We consider the combinatorial bandits problem with semi-bandit feedback under finite sampling budget constraints, in which the learner can carry out its action only for a limited number of times specified by an overall budget. The action is to choose a set of arms, whereupon feedback for each arm in the chosen set is received. Unlike existing works, we study this problem in a non-stochastic setting with subset-dependent feedback, i.e., the semi-bandit feedback received could be generated by an oblivious adversary and also might depend on the chosen set of arms. In addition, we consider a general feedback scenario covering both the numerical-based as well as preference-based case and introduce a sound theoretical framework for this setting guaranteeing sensible notions of optimal arms, which a learner seeks to find. We suggest a generic algorithm suitable to cover the full spectrum of conceivable arm elimination strategies from aggressive to conservative. Theoretical questions about the sufficient and necessary budget of the algorithm to find the best arm are answered and complemented by deriving lower bounds for any learning algorithm for this problem scenario. AU - Brandt, Jasmin AU - Haddenhorst, Björn AU - Bengs, Viktor AU - Hüllermeier, Eyke ID - 30724 T2 - arXiv:2202.04487 TI - Finding Optimal Arms in Non-stochastic Combinatorial Bandits with Semi-bandit Feedback and Finite Budget ER - TY - CHAP AU - Temmen, Katrin AU - Kersten, Peter AU - Schäfer, Dominik ID - 29950 SN - 2367-3370 T2 - Mobility for Smart Cities and Regional Development - Challenges for Higher Education TI - Work-in-Progress: The Potential of Interactive Scripts – Supporting Conceptual Understanding and Collaborative Problem-Solving Skills VL - 390 ER - TY - GEN AB - Es ist eine Reibscheibe (18) für eine Reibungskupplung (10) vorgesehen mit einem zwischen Druckplatten (14, 16, 38) verklemmbaren Rotorring (32), Reibbelägen zur Herstellung eines Reibschlusses des Rotorrings (32) mit der jeweiligen Druckplatte, (14, 16, 38), einem axial feststehenden Wellenelement (20) zur Übertragung eines Drehmoments und mindestens einem mit dem Rotorring (32) und mit dem Wellenelement (20) im Wesentlichen drehfest verbundenen und in axialer Richtung elastisch nachgiebigen Federelement (34) zur elastischen axialen Verlagerung des Rotorrings (32) relativ zum Wellenelement (20), wobei der Rotorring (32) zwischen einer Offenstellung, in welcher das Federelement (34) entspannt ist, und einer Schließstellung, in welcher das Federelement (34) von mindestens einer Druckplatte (14, 16, 38) verspannt ist, im Wesentlichen in axialer Richtung parallelverschiebbar ist. Durch den über den vergleichsweise geringen erforderlichen axialen Verlagerungsweg federnd an dem axial unbeweglichen Wellenelement (20) angebundenen die Reibbeläge tragenden Rotorring (32) kann bei geringen Herstellungskosten unnötige Reibung vermieden werden, so dass eine verschleißarme und geräuscharme lösbare Koppelung von Bauteilen ermöglicht ist. AU - Zimmer, Detmar AU - Blumenthal, Lars Martin AU - Schadomsky, Magnus ID - 30730 TI - Reibscheibe für eine Reibungskupplung ER - TY - GEN AU - Schulz, Michael AU - Neuhaus, Uwe AU - Kaufmann, Jens AU - Kühnel, Stephan AU - Alekozai, Emal M. AU - Rohde, Heiko AU - Hoseini, Sayed AU - Theuerkauf, René AU - Badura, Daniel AU - Kerzel, Ulrich AU - Lanquillon, Carsten AU - Daurer, Stephan AU - Günther, Maik AU - Huber, Lukas AU - Thiée, Lukas-Walter AU - zur Heiden, Philipp AU - Passlick, Jens AU - Dieckmann, Jonas AU - Schwade, Florian AU - Seyffarth, Tobias AU - Badewitz, Wolfgang AU - Rissler, Raphael AU - Sackmann, Stefan AU - Gölzer, Philipp AU - Welter, Felix AU - Röth, Jochen AU - Seidelmann, Julian AU - Haneke, Uwe ID - 30737 TI - DASC-PM v1.1 - Ein Vorgehensmodell für Data-Science-Projekte ER - TY - JOUR AU - Riedl, Thomas AU - Kunnathully, Vinay S. AU - Trapp, Alexander AU - Langer, Timo AU - Reuter, Dirk AU - Lindner, Jörg K. N. ID - 30743 JF - Advanced Materials Interfaces KW - Mechanical Engineering KW - Mechanics of Materials SN - 2196-7350 TI - Size‐Dependent Strain Relaxation in InAs Quantum Dots on Top of GaAs(111)A Nanopillars ER - TY - CONF AU - Huber, Jonas AU - Wallmeier, Peter AU - Pieper, Ralf AU - Schafmeister, Frank AU - Kolar, Johann ID - 30844 T2 - Proc. 9th IEEJ International Power Electronics Conference (IPEC) TI - Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters ER -