@inproceedings{56836, author = {{Claes, Leander and Johannesmann, Sarah and Zeipert, Henning and Henning, Bernd}}, booktitle = {{2023 International Congress on Ultrasonics, Beijing, China}}, issn = {{1742-6596}}, pages = {{012171}}, publisher = {{IOP Publishing}}, title = {{{Broadband acoustic waves in plate-like structures for acoustic material characterisation}}}, doi = {{10.1088/1742-6596/2822/1/012171}}, volume = {{2822}}, year = {{2024}}, } @inproceedings{56835, author = {{Dreiling, Dmitrij and Itner, Dominik and Hetkämper, Tim and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}}, booktitle = {{2023 International Congress on Ultrasonics, Beijing, China}}, issn = {{1742-6596}}, pages = {{012169}}, publisher = {{IOP Publishing}}, title = {{{A pulse-echo measurement setup to determine viscoelastic material parameters}}}, doi = {{10.1088/1742-6596/2822/1/012169}}, volume = {{2822}}, year = {{2024}}, } @article{56193, abstract = {{Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media are consid-ered, for operation in the linear regime. We outline and implement a largely analytic procedure forrigorous modal analysis of three-layer slabs with birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant TE or TM polarization, and with effective indices that depend on the propagation directionof the modes, relative to the crystal axes. Strong hybridization can be observed for near degeneratemodes in singular configurations without vertical symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same symmetry class. Dispersion curves for slab thickness and propa-gation angle are discussed, for slabs with oxide and air cover. }}, author = {{Hammer, Manfred and Farheen, Henna and Förstner, Jens}}, issn = {{2770-0208}}, journal = {{Optics Continuum}}, keywords = {{tet_topic_waveguide}}, pages = {{532822}}, publisher = {{Optica Publishing Group}}, title = {{{Guided modes of thin-film lithium niobate slabs}}}, doi = {{10.1364/optcon.532822}}, year = {{2024}}, } @article{56929, abstract = {{The market for microinverters is growing, especially in Europe. Driven by rising electricity prices and an easing in legislation since 2024, the number of mini-photovoltaic energy systems (mini-PVs) being installed is increasing substantially. Indoor and outdoor studies of microinverters have been carried out at Paderborn University since 2014. In the indoor lab, conversion efficiencies as a function of load have been measured with high accuracy and ranked according to Euro and CEC weightings; the latest rankings from 2024 are included in this paper. In the outdoor lab, energy yields have been measured using identical and calibrated crystalline silicon PV modules; until 2020, measurements were carried out using 215 Wp modules. Because of increasing PV module power ratings, 360 Wp modules were used from 2020 until 2024. In 2024, the test modules were upgraded to 410 Wp modules, taking into account the increase from 600 W to 800 W of inverter power limits, which is suitable for simplified operation permission (“plug-in”) in many European countries within a homogenised legislation area for such mini-photovoltaic energy systems or “balcony power plants”. This legislation for simplified operation also covers overpowered mini-plants, although the maximum AC output remains limited to 800 W. Presently, yield assessments are being carried out in the outdoor lab, which will take at least a year to be valid and comparable. Kits consisting of PV modules, inverters, and mounting systems are also being evaluated. Yield rankings sometimes differ from efficiency rankings due to the use of different MPPT algorithms with different MPP approach speeds and accuracies. To accelerate yield assessment, we developed a novel, simple formula to determine energy yield for any module and inverter configuration, including overpowered systems. This is a linear approach, determined by just two coefficients, a and b, which are given for several inverters. To reduce costs, inverters will be integrated into the module frame or the module terminal box in the future.}}, author = {{Krauter, Stefan and Bendfeld, Jörg}}, issn = {{1996-1073}}, journal = {{Energies}}, number = {{22}}, publisher = {{MDPI AG}}, title = {{{Efficiency Ranking of Photovoltaic Microinverters and Energy Yield Estimations for Photovoltaic Balcony Power Plants}}}, doi = {{10.3390/en17225551}}, volume = {{17}}, year = {{2024}}, } @book{55482, abstract = {{https://www.akkudoktor.net/2024/07/24/kostenloses-balkonsolar-buch/}}, author = {{Schmitz, Andreas and Ofenheusle, Christian and Müller, Sebastian and Krauter, Stefan}}, isbn = {{979-8328709576}}, publisher = {{Eigenverlag}}, title = {{{Balkonkraftwerke für alle: Der Leitfaden für die Energiewende zum Selbermachen}}}, year = {{2024}}, } @inproceedings{58230, author = {{Vernholz, Mats and Temmen, Katrin}}, booktitle = {{Book of Abstracts zum 8. Technikdidaktik-Symposium}}, editor = {{Zinn, Bernd and Tenberg, Ralf and Pittich, Daniel}}, title = {{{Vergleichsprozesse und ihr Einfluss auf die selbst wahrgenommenen Fähigkeiten angehender gewerblich-technischer Lehrkräfte}}}, year = {{2024}}, } @inproceedings{58229, author = {{Vernholz, Mats and Temmen, Katrin}}, location = {{Dresden}}, title = {{{Im Spannungsfeld zwischen Fach- und Bildungswissenschaft - Einflussfaktoren auf die Selbsteinschätzungen gewerblich-technischer Lehramtsstudierender in den verschiedenen Bereichen des Master of Education}}}, year = {{2024}}, } @inproceedings{58226, author = {{Vernholz, Mats and Schäfers, Johannes and Jonas-Ahrend, Gabriela and Temmen, Katrin}}, location = {{München}}, title = {{{Uni trifft Schule - Kooperative Unterrichtsentwicklung unter Einbezug von KI in der gewerblich-technischen Lehramtsausbildung}}}, year = {{2024}}, } @inproceedings{58166, author = {{Jonas-Ahrend, Gabriela and Kaiser, Franz and Traum, Anne}}, location = {{Dresden}}, title = {{{Netzwerk empirische Forschung zur beruflichen Lehrkräftebildung (Poster)}}}, year = {{2024}}, } @inproceedings{58257, author = {{Ratnam, Tara and Gudjonsdottir, Hafdis and Jonas-Ahrend, Gabriela}}, location = {{Philadelphia/USA}}, title = {{{The Emergence of an Invisible College as an Offshoot withn the ISATT Community}}}, year = {{2024}}, } @article{52958, author = {{Boeddeker, Christoph and Subramanian, Aswin Shanmugam and Wichern, Gordon and Haeb-Umbach, Reinhold and Le Roux, Jonathan}}, issn = {{2329-9290}}, journal = {{IEEE/ACM Transactions on Audio, Speech, and Language Processing}}, keywords = {{Electrical and Electronic Engineering, Acoustics and Ultrasonics, Computer Science (miscellaneous), Computational Mathematics}}, pages = {{1185--1197}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{TS-SEP: Joint Diarization and Separation Conditioned on Estimated Speaker Embeddings}}}, doi = {{10.1109/taslp.2024.3350887}}, volume = {{32}}, year = {{2024}}, } @misc{12950, author = {{Claes, Leander and Webersen, Manuel}}, publisher = {{GitHub, Inc.}}, title = {{{pyfds 0.3.1 - modular field simulation tool}}}, doi = {{10.5281/ZENODO.2649826}}, year = {{2024}}, } @inproceedings{53828, author = {{Zeipert, Henning and Hölscher, Jonas and Claes, Leander and Henning, Bernd}}, booktitle = {{Fortschritte der Akustik - DAGA 2024}}, editor = {{Gesellschaft für Akustik e.V., Deutsche}}, pages = {{640–643}}, title = {{{Beschreibung des akustischen Verhaltens verklebter plattenförmiger Strukturen mittels Kopplungsmodellen}}}, year = {{2024}}, } @inproceedings{58228, author = {{Vernholz, Mats and Jonas-Ahrend, Gabriela}}, location = {{Halle (an der Saale)}}, title = {{{„Und ich sag mal, Theorie und Praxis ist zweierlei” – Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten?}}}, year = {{2024}}, } @article{64550, author = {{Zens, Leon and Besaga, Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}}, issn = {{1094-4087}}, journal = {{Optics Express}}, publisher = {{Optica Publishing Group}}, title = {{{Holographic measurement of gain and linewidth enhancement factor in semiconductor waveguides}}}, doi = {{10.1364/oe.538741}}, year = {{2024}}, } @article{64585, author = {{Lindemann, Markus and Gerhardt, Nils Christopher and Dainone, Pambiang Abel and Renucci, Pierre and Bouché, Alexandre and Morassi, Martina and Devaux, Xavier and George, Jean-Marie and Jaffrès, Henri and Lemaitre, Aristide and Xu, Bo and Stoffel, Mathieu and Chen, Tongxin and Lombez, Laurent and Lagarde, Delphine and Cong, Guangwei and Ma, Tianyi and Pigeat, Philippe and Vergnat, Michel and Rinnert, Hervé and Marie, Xavier and Han, Xiufeng and Mangin, Stephane and Rojas-Sánchez, Juan-Carlos and Wang, Jian-Ping and Beard, Matthew C. and Žutić, Igor and Figueiredo Prestes, Nicholas and Lu, Yuan}}, journal = {{Nature}}, number = {{8005}}, pages = {{783 -- 788}}, title = {{{Controlling the helicity of light by electrical magnetization switching}}}, doi = {{10.1038/s41586-024-07125-5}}, volume = {{627}}, year = {{2024}}, } @article{64549, author = {{Zens, Leon and Besaga, Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}}, issn = {{1094-4087}}, journal = {{Optics Express}}, publisher = {{Optica Publishing Group}}, title = {{{Holographic measurement of gain and linewidth enhancement factor in semiconductor waveguides}}}, doi = {{10.1364/oe.538741}}, year = {{2024}}, } @inproceedings{59704, author = {{Kagarura, Geoffrey Mark and Hilleringmann, Ulrich and Petrov, Dmitry}}, booktitle = {{2023 IEEE International Conferences on Internet of Things (iThings) and IEEE Green Computing & Communications (GreenCom) and IEEE Cyber, Physical & Social Computing (CPSCom) and IEEE Smart Data (SmartData) and IEEE Congress on Cybermatics (Cybermatics)}}, publisher = {{IEEE}}, title = {{{A low cost weather monitoring, PV and prediction system in East Africa}}}, doi = {{10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130}}, year = {{2024}}, } @inproceedings{64296, author = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Ledentsov, N. N. and Shchukin, V. A. and Makarov, O. Y. and Zerova, V. and D’alessandro, M. and Tibaldi, A. and Turkiewicz, J. P.}}, booktitle = {{2024 IEEE 29th International Semiconductor Laser Conference (ISLC)}}, title = {{{Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs}}}, doi = {{10.1109/islc57752.2024.10717381}}, year = {{2024}}, } @article{64295, author = {{Zens, Leon and Besaga, Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin R.}}, journal = {{Optics express}}, number = {{1}}, pages = {{34 -- 49}}, title = {{{Holographic measurement of gain and linewidth enhancement factor in semiconductor waveguides}}}, doi = {{10.1364/oe.538741}}, volume = {{33}}, year = {{2024}}, }