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 -