@article{30384,
author = {{Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}},
issn = {{2469-9950}},
journal = {{Physical Review B}},
number = {{4}},
publisher = {{American Physical Society (APS)}},
title = {{{Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}}},
doi = {{10.1103/physrevb.105.045302}},
volume = {{105}},
year = {{2022}},
}
@inproceedings{30387,
abstract = {{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}},
author = {{Hammer, Manfred and Ebers, Lena and Förstner, Jens}},
booktitle = {{Complex Light and Optical Forces XVI}},
editor = {{Andrews, David L. and Galvez, Enrique J. and Rubinsztein-Dunlop, Halina}},
keywords = {{tet_topic_waveguide}},
pages = {{120170F}},
publisher = {{SPIE}},
title = {{{Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber}}},
doi = {{10.1117/12.2612179}},
year = {{2022}},
}
@article{30490,
author = {{Cresson, Jacky and Jiménez, Fernando and Ober-Blöbaum, Sina}},
journal = {{AIMS}},
pages = {{57--89}},
title = {{{Continuous and discrete Noether's fractional conserved quantities for restricted calculus of variations}}},
volume = {{14(1)}},
year = {{2022}},
}
@phdthesis{30722,
abstract = {{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.}},
author = {{Ebers, Lena}},
keywords = {{tet_topic_waveguide}},
title = {{{Semi-guided waves in integrated optical waveguide structures}}},
doi = {{10.17619/UNIPB/1-1288}},
year = {{2022}},
}
@unpublished{30724,
abstract = {{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.}},
author = {{Brandt, Jasmin and Haddenhorst, Björn and Bengs, Viktor and Hüllermeier, Eyke}},
booktitle = {{arXiv:2202.04487}},
title = {{{Finding Optimal Arms in Non-stochastic Combinatorial Bandits with Semi-bandit Feedback and Finite Budget}}},
year = {{2022}},
}
@inbook{29950,
author = {{Temmen, Katrin and Kersten, Peter and Schäfer, Dominik}},
booktitle = {{Mobility for Smart Cities and Regional Development - Challenges for Higher Education}},
isbn = {{9783030939069}},
issn = {{2367-3370}},
location = {{Dresden}},
pages = {{784--791}},
publisher = {{Springer International Publishing}},
title = {{{Work-in-Progress: The Potential of Interactive Scripts – Supporting Conceptual Understanding and Collaborative Problem-Solving Skills}}},
doi = {{10.1007/978-3-030-93907-6_85}},
volume = {{390}},
year = {{2022}},
}
@misc{30730,
abstract = {{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. }},
author = {{Zimmer, Detmar and Blumenthal, Lars Martin and Schadomsky, Magnus}},
pages = {{14}},
title = {{{Reibscheibe für eine Reibungskupplung}}},
year = {{2022}},
}
@misc{30737,
author = {{Schulz, Michael and Neuhaus, Uwe and Kaufmann, Jens and Kühnel, Stephan and Alekozai, Emal M. and Rohde, Heiko and Hoseini, Sayed and Theuerkauf, René and Badura, Daniel and Kerzel, Ulrich and Lanquillon, Carsten and Daurer, Stephan and Günther, Maik and Huber, Lukas and Thiée, Lukas-Walter and zur Heiden, Philipp and Passlick, Jens and Dieckmann, Jonas and Schwade, Florian and Seyffarth, Tobias and Badewitz, Wolfgang and Rissler, Raphael and Sackmann, Stefan and Gölzer, Philipp and Welter, Felix and Röth, Jochen and Seidelmann, Julian and Haneke, Uwe}},
publisher = {{NORDAKADEMIE gAG Hochschule der Wirtschaft}},
title = {{{DASC-PM v1.1 - Ein Vorgehensmodell für Data-Science-Projekte}}},
year = {{2022}},
}
@article{30743,
author = {{Riedl, Thomas and Kunnathully, Vinay S. and Trapp, Alexander and Langer, Timo and Reuter, Dirk and Lindner, Jörg K. N.}},
issn = {{2196-7350}},
journal = {{Advanced Materials Interfaces}},
keywords = {{Mechanical Engineering, Mechanics of Materials}},
publisher = {{Wiley}},
title = {{{Size‐Dependent Strain Relaxation in InAs Quantum Dots on Top of GaAs(111)A Nanopillars}}},
doi = {{10.1002/admi.202102159}},
year = {{2022}},
}
@inproceedings{30844,
author = {{Huber, Jonas and Wallmeier, Peter and Pieper, Ralf and Schafmeister, Frank and Kolar, Johann}},
booktitle = {{Proc. 9th IEEJ International Power Electronics Conference (IPEC)}},
location = {{Himeji, Japan}},
publisher = {{IEE Japan}},
title = {{{Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters}}},
year = {{2022}},
}
@article{30861,
abstract = {{AbstractWe consider the problem of maximization of metabolite production in bacterial cells formulated as a dynamical optimal control problem (DOCP). According to Pontryagin’s maximum principle, optimal solutions are concatenations of singular and bang arcs and exhibit the chattering or Fuller phenomenon, which is problematic for applications. To avoid chattering, we introduce a reduced model which is still biologically relevant and retains the important structural features of the original problem. Using a combination of analytical and numerical methods, we show that the singular arc is dominant in the studied DOCPs and exhibits the turnpike property. This property is further used in order to design simple and realistic suboptimal control strategies.}},
author = {{Caillau, Jean-Baptiste and Djema, Walid and Gouzé, Jean-Luc and Maslovskaya, Sofya and Pomet, Jean-Baptiste}},
issn = {{0022-3239}},
journal = {{Journal of Optimization Theory and Applications}},
keywords = {{Applied Mathematics, Management Science and Operations Research, Control and Optimization}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Turnpike Property in Optimal Microbial Metabolite Production}}},
doi = {{10.1007/s10957-022-02023-0}},
year = {{2022}},
}
@unpublished{30868,
abstract = {{Algorithm configuration (AC) is concerned with the automated search of the
most suitable parameter configuration of a parametrized algorithm. There is
currently a wide variety of AC problem variants and methods proposed in the
literature. Existing reviews do not take into account all derivatives of the AC
problem, nor do they offer a complete classification scheme. To this end, we
introduce taxonomies to describe the AC problem and features of configuration
methods, respectively. We review existing AC literature within the lens of our
taxonomies, outline relevant design choices of configuration approaches,
contrast methods and problem variants against each other, and describe the
state of AC in industry. Finally, our review provides researchers and
practitioners with a look at future research directions in the field of AC.}},
author = {{Schede, Elias and Brandt, Jasmin and Tornede, Alexander and Wever, Marcel Dominik and Bengs, Viktor and Hüllermeier, Eyke and Tierney, Kevin}},
booktitle = {{arXiv:2202.01651}},
title = {{{A Survey of Methods for Automated Algorithm Configuration}}},
year = {{2022}},
}
@article{30880,
author = {{Kobecki, Michal and Scherbakov, Alexey V. and Kukhtaruk, Serhii M. and Yaremkevich, Dmytro D. and Henksmeier, Tobias and Trapp, Alexander and Reuter, Dirk and Gusev, Vitalyi E. and Akimov, Andrey V. and Bayer, Manfred}},
issn = {{0031-9007}},
journal = {{Physical Review Letters}},
keywords = {{General Physics and Astronomy}},
number = {{15}},
publisher = {{American Physical Society (APS)}},
title = {{{Giant Photoelasticity of Polaritons for Detection of Coherent Phonons in a Superlattice with Quantum Sensitivity}}},
doi = {{10.1103/physrevlett.128.157401}},
volume = {{128}},
year = {{2022}},
}
@article{30894,
author = {{Tuzgel, Firat and Akbulut Irmak, Emine Fulya and Guzel, Erkan and Yucesoy, Atacan and Sahin, Selim and Tasdemirci, Alper and Guden, Mustafa}},
issn = {{0263-8231}},
journal = {{Thin-Walled Structures}},
keywords = {{Mechanical Engineering, Building and Construction, Civil and Structural Engineering}},
publisher = {{Elsevier BV}},
title = {{{Testing and modeling blast loading of a sandwich structure cored with a bio-inspired (balanus) core}}},
doi = {{10.1016/j.tws.2022.109185}},
volume = {{175}},
year = {{2022}},
}
@article{30903,
abstract = {{Federkraftbremsen sind weit verbreitete Komponenten der Antriebstechnik, ansteigend mit abnehmender Größe erreichen sie aktuell Drehzahlen von bis zu 5 000 min−1. Es besteht ein Trend zu schnell laufenden Antrieben, mit Drehzahlen von 10 000 min−1 und darüber. Bisher sind wenig Kenntnisse über das Verhalten des Reibwerts und -moments herkömmlicher Federkraftbremsen mit kostengünstigen organischen Reibbelägen bei diesen Einsatzbedingungen bekannt. Daher wurde ein Prüfstand entwickelt, der die Untersuchung bei Gleitgeschwindigkeiten von bis zu 50 m/s bei verschiedenen Lastträgheiten ermöglicht. Die Versuche zeigten, dass bei begrenzten Reibarbeiten die herkömmliche Federkraftbremse durchaus das Nennbremsmoment bei höheren Gleitgeschwindigkeiten erreicht.}},
author = {{Schadomsky, Magnus and Zimmer, Detmar}},
issn = {{0720-5953}},
journal = {{Konstruktion}},
keywords = {{Federkraftbremse, Gleitgeschwindigkeit}},
number = {{04}},
pages = {{58--64}},
publisher = {{VDI Fachmedien}},
title = {{{Betrieb von Federkraftbremsen bei hohen Gleitgeschwindigkeiten}}},
doi = {{https://doi.org/10.37544/0720-5953-2022-04-58}},
year = {{2022}},
}
@article{30910,
author = {{Ma, Lin and Pollard, Travis P. and Zhang, Yong and Schroeder, Marshall A. and Ren, Xiaoming and Han, Kee Sung and Ding, Michael S. and Cresce, Arthur V. and Atwater, Terrill B. and Mars, Julian and Cao, Longsheng and Steinrück, Hans-Georg and Mueller, Karl T. and Toney, Michael F. and Hourwitz, Matt and Fourkas, John T. and Maginn, Edward J. and Wang, Chunsheng and Borodin, Oleg and Xu, Kang}},
issn = {{2590-3322}},
journal = {{One Earth}},
keywords = {{Earth and Planetary Sciences (miscellaneous), General Environmental Science}},
number = {{4}},
pages = {{413--421}},
publisher = {{Elsevier BV}},
title = {{{Ammonium enables reversible aqueous Zn battery chemistries by tailoring the interphase}}},
doi = {{10.1016/j.oneear.2022.03.012}},
volume = {{5}},
year = {{2022}},
}
@article{30913,
abstract = {{Context: The implementation of successful measures to support immigrants' integration in cultural, social, and economic life can be considered as one of today's greatest challenges for many societies. This is especially true for adolescent immigrants who have not yet been able to finish education or gain qualifications relevant to joining the labour market. That is why many receiving countries have developed and implemented special programmes that aim at supporting immigrants' integration by facilitating their employability. Unfortunately, not much is known about the process of implementing these programmes or about how education systems, schools, and teachers are dealing with the new situation and target group. In this contribution, the implementation, development, and challenges of German Vocational Integration Classes (VIC), as an example of comparable programmes in the EU, are investigated to address this research gap. The paper considers the following exploratory research questions: (a) What challenges have been experienced by teachers and social workers in the implementation of VIC as well as in the integration of immigrants into the labour market in recent years? (b) How can these challenges be met in the long run and how should VIC be developed to better achieve its aims?
Methods: To answer these questions, a sequential qualitative study containing questionnaire and interview elements was conducted. First, teachers and social workers involved in VIC filled in a questionnaire about their experiences and experienced challenges in implementing VIC (N = 46). Then, supplementing interviews were conducted with participants from the first sample in order to generate further insights and to contextualise the findings from the first study part (N = 14).
Findings: From the respondents' answers, it appears that the VIC programme is well implemented. The results show, however, that central challenges continue to exist. This concerns, for example, legal regulations or the development of adequate curricula, but also the scope and quality of language education. In addition, problems have also been identified with regard to students' culture-specific education and their individual attitudes. These prevailing problems seem to affect schooling and educational processes. In addition, respondents report feeling left alone to deal with problems and that their experiences from their daily work in VIC and with immigrants are not sufficiently taken into account in policy and school-related decisions.
Conclusions: Although VIC seems well implemented, key challenges remain in the view of the participants. It was found that teachers cannot solve many of the identified problems themselves, as they require action at the level of policy or school organisation. For staff, this can be accompanied by increased stress and demotivation. For the young immigrants, the existing challenges can have a long-term impact on school success and transition to vocational education and training. The study thus highlights the importance of targeted and holistic strategies to support immigrant integration through education. }},
author = {{Goller, Michael}},
journal = {{International Journal for Research in Vocational Education and Training}},
keywords = {{Immigration, Educational Policy, Employability, Mixed Methods, VET, Vocational Education and Training, Transitions From Education and Training to Employment}},
number = {{1}},
pages = {{92--119}},
title = {{{Supporting Young Immigrants in Their Transition From School to Work? A Staff Perspective on Challenges of Vocational Integration Classes}}},
doi = {{https://doi.org/10.13152/IJRVET.9.1.5}},
volume = {{9}},
year = {{2022}},
}
@article{30917,
abstract = {{We study lobby group formation in a two-stage model where the players rst form lobby
groups that then engage in a rent-seeking contest to inuence the legislator. However, the
outcome of the contest aects all players according to the ideological distance between the
implemented policy and the players' preferences. The players can either lobby by themselves,
form a coalition of lobbyists or free ride. We nd that free coalition formation is reasonable
if either players with moderate preferences face lobby groups with extreme preferences, or if
there are two opposing coalitions with an equal number of members. Otherwise, there are
always free riders among the players.}},
author = {{Block, Lukas}},
journal = {{Quick And Easy Journal Title}},
keywords = {{Group formation, Rent-seeking, Free riding}},
title = {{{Coalition formation versus free riding in rent-seeking contests}}},
year = {{2022}},
}
@inproceedings{6590,
author = {{Nicolai, Marcel and Zeipert, Henning and Lugovtsova, Yevgeniya and Bulling, Jannis and Johannesmann, Sarah and Prager, Jens and Henning, Bernd}},
booktitle = {{Fortschritte der Akustik - DAGA 2022}},
location = {{Stuttgart}},
pages = {{1394--1397}},
title = {{{Quantification of the adhesive coupling of layered structures using guided ultrasonic waves}}},
year = {{2022}},
}
@article{30920,
abstract = {{Abstract
Batteries capable of extreme fast-charging (XFC) are a necessity for the deployment of electric vehicles. Material properties of electrodes and electrolytes along with cell parameters such as stack pressure and temperature have coupled, synergistic, and sometimes deleterious effects on fast-charging performance. We develop a new experimental testbed that allows precise and conformal application of electrode stack pressure. We focus on cell capacity degradation using single-layer pouch cells with graphite anodes, LiNi0.5Mn0.3Co0.2O2 (NMC532) cathodes, and carbonate-based electrolyte. In the tested range (10 – 125 psi), cells cycled at higher pressure show higher capacity and less capacity fading. Additionally, Li plating decreases with increasing pressure as observed with scanning electron microscopy (SEM) and optical imaging. While the loss of Li inventory from Li plating is the largest contributor to capacity fade, electrochemical and SEM examination of the NMC cathodes after XFC experiments show increased secondary particle damage at lower pressure. We infer that the better performance at higher pressure is due to more homogenous reactions of active materials across the electrode and less polarization through the electrode thickness. Our study emphasizes the importance of electrode stack pressure in XFC batteries and highlights its subtle role in cell conditions.}},
author = {{Cao, Chuntian and Steinrück, Hans-Georg and Paul, Partha P and Dunlop, Alison R. and Trask, Stephen E. and Jansen, Andrew and Kasse, Robert M and Thampy, Vivek and Yusuf, Maha and Nelson Weker, Johanna and Shyam, Badri and Subbaraman, Ram and Davis, Kelly and Johnston, Christina M and Takacs, Christopher J and Toney, Michael}},
issn = {{0013-4651}},
journal = {{Journal of The Electrochemical Society}},
keywords = {{Materials Chemistry, Electrochemistry, Surfaces, Coatings and Films, Condensed Matter Physics, Renewable Energy, Sustainability and the Environment, Electronic, Optical and Magnetic Materials}},
pages = {{040540}},
publisher = {{The Electrochemical Society}},
title = {{{Conformal Pressure and Fast-Charging Li-Ion Batteries}}},
doi = {{10.1149/1945-7111/ac653f}},
volume = {{169}},
year = {{2022}},
}