@inproceedings{41910, author = {{Duffe, Tobias and Schramm, Britta and Kullmer, Gunter}}, pages = {{157--166}}, publisher = {{Deutscher Verband für Materialforschung und –prüfung e.V.}}, title = {{{Experimentelle Ermittlung von Rissfortschrittskurven für hyperelastische Klebstoffe}}}, doi = {{10.48447/BR-2021-018}}, volume = {{DVM-Bericht 253}}, year = {{2021}}, } @inproceedings{29499, author = {{Duffe, Tobias and Kullmer, Gunter and Tews, Karina and Aubel, Tobias and Meschut, Gerson}}, booktitle = {{51. DVM-Tagung, Arbeitskreis Bruchmechanik und Bauteilsicherung}}, title = {{{Bruchmechanische Lebensdauervorhersage für hyperelastische Klebverbindungen}}}, year = {{2021}}, } @inproceedings{24538, author = {{Hilleringmann, Ulrich and Petrov, Dmitry and Mwammenywa, Ibrahim and Kagarura, Geoffrey M.}}, keywords = {{Art-D, Afrika}}, location = {{Arusha, Tansania}}, publisher = {{IEEE}}, title = {{{Local Power Control using Wireless Sensor System for Microgrids in Africa}}}, year = {{2021}}, } @inproceedings{29899, abstract = {{LLC resonant converters are typically unsuitable to be applied for wide voltage-transfer ratio applications. With a full-bridge inverter, however, they can be operated in a variety of different modulations. Most notably, by permanently turning on one MOSFET and turning off the other MOSFET of the same bridge leg, the LLC can be operated in half-bridge configuration reducing the gain by a factor of two. The resonant capacitor is hereby charged to an average voltage of half the input voltage. In this modulation, however, the switch that is permanently turned on is stressed by the complete resonant current while exhibiting no switching losses. This paper proves that the frequency-doubler modulation can better balance the losses among all MOSFETs and should be the preferred mode of operation favored over the conventional half-bridge modulation. This paper analyzes the beneficial loss distribution, proposes an on-the-fly morphing modulation and discusses potential operating strategies to further reduce the junction temperature. Furthermore, it is shown that this modulation can also be altered to achieve the asymmetrical LLC operation. Experimental measurement results show that the modulation results in a substantial decrease of the maximum MOSFET temperature and shows that the converter can be smoothly transitioned during operation from full-bridge modulation to the frequency-doubler half-bridge operation and back.}}, author = {{Rehlaender, Philipp and Unruh, Roland and Hankeln, Lars and Schafmeister, Frank and Böcker, Joachim}}, booktitle = {{23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)}}, isbn = {{978-9-0758-1537-5}}, keywords = {{Resonant converter, High frequency power converter, Switched-mode power supply, Converter control, Control methods for electrical systems}}, location = {{Ghent, Belgium}}, publisher = {{IEEE}}, title = {{{Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration}}}, doi = {{10.23919/EPE21ECCEEurope50061.2021.9570674}}, year = {{2021}}, } @phdthesis{42013, author = {{Stolbchenko, Mykhailo }}, isbn = {{978-3-8440-7971-5}}, publisher = {{Shaker Verlag}}, title = {{{Zwei-Rollen-Gießwalzen und thermomechanische Behandlung von dünnen Bändern aus der Aluminiumlegierung EN AW-6082}}}, year = {{2021}}, } @unpublished{32236, abstract = {{The interaction between quantum light and matter is being intensively studied for systems that are enclosed in high-$Q$ cavities which strongly enhance the light-matter coupling. However, for many applications, cavities with lower $Q$-factors are preferred due to the increased spectral width of the cavity mode. Here, we investigate the interaction between quantum light and matter represented by a $\Lambda$-type three-level system in lossy cavities, assuming that cavity losses are the dominant loss mechanism. We demonstrate that cavity losses lead to non-trivial steady states of the electronic occupations that can be controlled by the loss rate and the initial statistics of the quantum fields. The mechanism of formation of such steady states can be understood on the basis of the equations of motion. Analytical expressions for steady states and their numerical simulations are presented and discussed.}}, author = {{Rose, H. and Tikhonova, O. V. and Meier, T. and Sharapova, P. }}, booktitle = {{arXiv:2109.00842}}, title = {{{Steady states of $Λ$-type three-level systems excited by quantum light in lossy cavities}}}, year = {{2021}}, } @article{26077, abstract = {{Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.}}, author = {{Ferreri, Alessandro and Santandrea, Matteo and Stefszky, Michael and Luo, Kai Hong and Herrmann, Harald and Silberhorn, Christine and Sharapova, Polina R.}}, issn = {{2521-327X}}, journal = {{Quantum}}, title = {{{Spectrally multimode integrated SU(1,1) interferometer}}}, doi = {{10.22331/q-2021-05-27-461}}, year = {{2021}}, } @article{40379, author = {{Sukharnikov, Vladislav and Sharapova, Polina and Tikhonova, Olga}}, issn = {{0030-3992}}, journal = {{Optics & Laser Technology}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}}, publisher = {{Elsevier BV}}, title = {{{Managing spectral properties and Schmidt mode content of squeezed vacuum light using sum-frequency converter}}}, doi = {{10.1016/j.optlastec.2020.106769}}, volume = {{136}}, year = {{2021}}, } @article{41940, author = {{Lang, Susanne and Topalović, Elvira}}, journal = {{In: Praxis Deutschunterricht}}, pages = {{30--35}}, title = {{{Komplexe Wörter richtig schreiben. Wortanalyse als Rechtschreibstrategie.}}}, volume = {{4}}, year = {{2021}}, } @article{41939, author = {{Noack, Christina and Topalović, Elvira}}, journal = {{ In: Praxis Deutschunterricht}}, pages = {{4--10}}, title = {{{Rechtschreibstrategien und Sprachstrukturen.}}}, volume = {{4}}, year = {{2021}}, }