@book{18455, editor = {{Müller, Astrid and Tophinke, Doris}}, title = {{{Grammatik entdecken (Praxis Deutsch 282)}}}, volume = {{282}}, year = {{2020}}, } @article{18147, author = {{Tophinke, Doris}}, journal = {{Praxis Deutsch }}, pages = {{53 -- 57}}, title = {{{Installationskunst beschreiben. Die Grammatik des Lokalisierens entdecken}}}, volume = {{282}}, year = {{2020}}, } @article{18149, author = {{Müller, Astrid and Tophinke, Doris}}, journal = {{Praxis Deutsch }}, pages = {{4 -- 13}}, title = {{{Grammatik entdecken (Basisartikel)}}}, volume = {{282}}, year = {{2020}}, } @inproceedings{21626, author = {{Haak, Viktor and Meschut, Gerson and Lotte, Jens and Reisgen, Uwe}}, booktitle = {{10. Fügetechnisches Gemeinschaftskolloquium}}, location = {{Rostock}}, title = {{{Einseitiges Widerstandselementschweißen für die stahlintensive Mischbauweise}}}, year = {{2020}}, } @article{23742, abstract = {{ZusammenfassungDie Unterrichtsplanung stellt eine zentrale berufliche Anforderung an (Physik‑)Lehrkräfte dar. Bereits im Lehramtsstudium sollen grundlegende Fähigkeiten zur Unterrichtsplanung erworben und im Rahmen von schulpraktischen Phasen erprobt bzw. erweitert werden. Unklar ist jedoch, inwieweit das professionelle Wissen, das Lehramtsstudierende in ihren fachlichen, fachdidaktischen und erziehungswissenschaftlichen Studienteilen erwerben, tatsächlich bei der Planung von Fachunterricht genutzt wird. Ebenso gibt es nur punktuelle Erkenntnisse über die Entwicklung der Fähigkeit zur Unterrichtsplanung im Lehramtsstudium. Um diese Fragen zu klären, sind Messverfahren erforderlich, die die Fähigkeiten zur Unterrichtsplanung valide erfassen können und die gleichzeitig ökonomisch auswertbar sind, um Fallzahlen realisieren zu können, die auch kleine Effekte auflösen. Bisherige Ansätze, die reale Handlungsproben der Unterrichtsplanung (z. B. schriftliche Unterrichtsentwürfe) untersuchen, stehen vor der methodischen Herausforderung, dass die Generierung eines Fähigkeitsmaßes höchst anspruchsvoll ist, da reale Planungen individuell sehr unterschiedlich angelegt sind und vielen Randbedingungen unterliegen, die statistisch kaum kontrollierbar sind. In diesem Beitrag wird daher ein sogenannter Performanztest zur Erfassung der Fähigkeit zur Unterrichtsplanung vorgestellt und diskutiert. Ein Performanztest ist ein Verfahren, in dem in einem realitätsnahen Setting Handlungen unter standardisierten Rahmenbedingungen simuliert werden. Neben der theoriegeleiteten Entwicklung des Instruments und Vorstudien zur Sammlung von Validitätsargumenten werden auch erste Ergebnisse dargestellt, die aus Erhebungen vor und nach einem Praxissemester an vier Universitäten in drei Bundesländern resultieren (N = 174 Unterrichtsplanungen). Dabei stellt sich das Testverfahren als ausreichend sensitiv heraus, um für N = 68 Testpersonen (ca. 20 % Dropout) erwartungstreu eine signifikante Zunahme des Testscores während des Praxissemesters, welches als Lerngelegenheit angenommen werden kann, zu messen.}}, author = {{Schröder, Jan and Riese, Josef and Vogelsang, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Kulgemeyer, Christoph and Reinhold, Peter and Schecker, Horst}}, issn = {{0949-1147}}, journal = {{Zeitschrift für Didaktik der Naturwissenschaften}}, pages = {{103--122}}, title = {{{Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests}}}, doi = {{10.1007/s40573-020-00115-w}}, year = {{2020}}, } @article{23743, author = {{Kulgemeyer, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Reinhold, Peter and Riese, Josef and Schecker, Horst and Schröder, Jan and Vogelsang, Christoph}}, issn = {{0022-4308}}, journal = {{Journal of Research in Science Teaching}}, pages = {{1554--1582}}, title = {{{Professional knowledge affects action‐related skills: The development of preservice physics teachers' explaining skills during a field experience}}}, doi = {{10.1002/tea.21632}}, year = {{2020}}, } @inbook{35521, author = {{Vogelsang, Christoph and Borowski, A. and Kugelmeyer, C. and Riese, J. and Buschhüter, D. and Enkrott, P. and Kempin, M. and Reinhold, Peter and Schecker, H. and Schröder, J.}}, booktitle = {{Student Learning in German Higher Education}}, isbn = {{9783658278854}}, pages = {{105--123}}, publisher = {{Springer Fachmedien Wiesbaden}}, title = {{{Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship}}}, doi = {{10.1007/978-3-658-27886-1_6}}, year = {{2020}}, } @article{35527, author = {{Breuer, Judith and Vogelsang, Christoph and Reinhold, Peter}}, journal = {{PhyDid A - Physik und Didaktik in Schule und Hochschule}}, title = {{{Implementation und Nutzung von Unterrichtsmaterialien im schulischen Unterricht – Eine Bestandsaufnahme der mathematisch-naturwissenschaftlichen Fächer}}}, year = {{2020}}, } @inbook{35535, author = {{Gokeler, Alli and Büchel, Daniel}}, booktitle = {{Injury and Health Risk Management in Sports}}, isbn = {{9783662607510}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Pre-seasonal Assessment and Performance Diagnostics: Orthopaedic and Functional Aspects}}}, doi = {{10.1007/978-3-662-60752-7_12}}, year = {{2020}}, } @inproceedings{35559, author = {{Schulze Darup, Moritz and Jager, Tibor}}, booktitle = {{2019 IEEE 58th Conference on Decision and Control (CDC)}}, publisher = {{IEEE}}, title = {{{Encrypted Cloud-based Control using Secret Sharing with One-time Pads}}}, doi = {{10.1109/cdc40024.2019.9029342}}, year = {{2020}}, } @inproceedings{35558, author = {{Schulze Darup, Moritz }}, booktitle = {{2020 European Control Conference (ECC)}}, publisher = {{IEEE}}, title = {{{Exact representation of piecewise affine functions via neural networks}}}, doi = {{10.23919/ecc51009.2020.9143957}}, year = {{2020}}, } @inproceedings{35567, author = {{Alexandru, Andreea B. and Schulze Darup, Moritz and Pappas, George J.}}, booktitle = {{2019 IEEE 58th Conference on Decision and Control (CDC)}}, publisher = {{IEEE}}, title = {{{Encrypted Cooperative Control Revisited}}}, doi = {{10.1109/cdc40024.2019.9030124}}, year = {{2020}}, } @article{35580, author = {{Schulze Darup, Moritz}}, issn = {{1049-8923}}, journal = {{International Journal of Robust and Nonlinear Control}}, keywords = {{Electrical and Electronic Engineering, Industrial and Manufacturing Engineering, Mechanical Engineering, Aerospace Engineering, Biomedical Engineering, General Chemical Engineering, Control and Systems Engineering}}, number = {{11}}, pages = {{4168--4187}}, publisher = {{Wiley}}, title = {{{Encrypted polynomial control based on tailored two‐party computation}}}, doi = {{10.1002/rnc.5003}}, volume = {{30}}, year = {{2020}}, } @article{35585, author = {{Lu, Jingyi and Leong, Alex S. and Quevedo, Daniel E.}}, issn = {{1049-8923}}, journal = {{International Journal of Robust and Nonlinear Control}}, keywords = {{Electrical and Electronic Engineering, Industrial and Manufacturing Engineering, Mechanical Engineering, Aerospace Engineering, Biomedical Engineering, General Chemical Engineering, Control and Systems Engineering}}, number = {{11}}, pages = {{4205--4224}}, publisher = {{Wiley}}, title = {{{Optimal event‐triggered transmission scheduling for privacy‐preserving wireless state estimation}}}, doi = {{10.1002/rnc.4910}}, volume = {{30}}, year = {{2020}}, } @article{24743, author = {{Stender, Jana and Vogelsang, Christoph and Watson, Christina and Schaper, Niclas}}, isbn = {{978-3-8340-2103-8}}, journal = {{Jahrbuch für Allgemeine Didaktik (JfAD) }}, pages = {{18--39}}, publisher = {{Schneider Verlag Hohengehren}}, title = {{{Reflexion von (eigenem oder fremdem) Klassenführungsverhalten angehender Lehrpersonen. Eine Untersuchung im Kontext von Unterrichtssimulationen im Lehramtsstudium.}}}, year = {{2020}}, } @article{24744, abstract = {{ Zusammenfassung. Längsschnittstudien, die das bildungswissenschaftliche Wissen als Teil der professionellen Kompetenz angehender Lehrkräfte über mehr als zwei Messzeitpunkte erfassen und den Einfluss individueller Eingangsvoraussetzungen auf die Wissensentwicklung untersuchen, stellen nach wie vor ein Forschungsdesiderat dar. Bisherige Studien liefern erste Hinweise darauf, dass individuelle Eingangsvoraussetzungen wie die Abiturnote, pädagogische Vorerfahrungen und Berufswahlmotive im Zusammenhang mit der Wissensentwicklung stehen und günstige Eingangsvoraussetzungen den Entwicklungsverlauf fördern können. Bislang ist unklar, wie sich das Wissen über den gesamten Studienverlauf in den Bachelor-/Master-Strukturen entwickelt. Des Weiteren ist auch unklar, inwieweit bestimmte Eingangsvoraussetzungen langfristige Entwicklungsverläufe erklären können. In der vorliegenden Studie wurden die Daten von 276 Studierenden, dessen Wissen zu fünf Messzeitpunkten erhoben wurde, mit Hilfe latenter Wachstumskurvenmodelle ausgewertet. Die Ergebnisse bestätigten einen Zuwachs des bildungswissenschaftlichen Wissens über den gesamten Studienverlauf. Den größten Wissenszuwachs erfuhren die Studierenden in den ersten zwei Semestern ihres Bachelorstudiums und beim Übergang in das Masterstudium. Des Weiteren konnte der Einfluss von individuellen kognitiven und motivationalen Eingangsvoraussetzungen auf den Leistungszuwachs bestätigt werden. So zeigte sich, dass Studierende, die eine bessere Abiturnote aufwiesen und bereits über eine unterrichtsnahe pädagogische Vorerfahrung verfügten, höhere Wissenszuwächse im Vergleich zu ihren Kommilitoninnen und Kommilitonen erfuhren, die einen schlechteren Abiturnotendurchschnitt hatten. Ebenfalls begünstigte das Motiv „mit Kindern und Jugendlichen arbeiten zu wollen“ die Wissensentwicklung. Die Ergebnisse können insbesondere für die Beratung genutzt werden, um die Motivlagen von Studierenden zu erfassen und sie dafür sensibel zu machen, welche Motivkonstellationen für einen erfolgreichen Studienverlauf günstig erscheinen. }}, author = {{Watson, Christina and Stender, Jana and Schaper, Niclas}}, issn = {{1010-0652}}, journal = {{Zeitschrift für Pädagogische Psychologie}}, pages = {{1--16}}, title = {{{Kompetenzentwicklung im bildungswissenschaftlichen Studium: Der Einfluss individueller Voraussetzungen auf die Entwicklung des bildungswissenschaftlichen Wissens angehender Lehrkräfte}}}, doi = {{10.1024/1010-0652/a000288}}, year = {{2020}}, } @article{34828, author = {{Hanusch, Maximilian}}, issn = {{0019-3577}}, journal = {{Indagationes Mathematicae}}, keywords = {{regularity of Lie groups}}, number = {{1}}, pages = {{152--176}}, publisher = {{Elsevier BV}}, title = {{{The regularity problem for Lie groups with asymptotic estimate Lie algebras}}}, doi = {{10.1016/j.indag.2019.12.001}}, volume = {{31}}, year = {{2020}}, } @article{34830, author = {{Hanusch, Maximilian}}, journal = {{Journal of Lie Theory}}, keywords = {{Lie theory, strong Trotter property}}, number = {{1}}, pages = {{025--032}}, publisher = {{Heldermann Verlag}}, title = {{{The Strong Trotter Property for Locally μ-convex Lie Groups}}}, volume = {{30}}, year = {{2020}}, } @article{35628, author = {{Klämpfl, Martin and Lobinger, Babett and Lehmann, Tim}}, journal = {{ International Journal of Sport Psychology}}, number = {{4}}, pages = {{359--382}}, title = {{{Exploring the phenomenological, environmental, and task-related aspects of the Yips in Tennis, Miniature Golf, Darts, and Archery.}}}, doi = {{10.7352/IJSP.2020.51.359}}, volume = {{51}}, year = {{2020}}, } @inbook{35654, author = {{Huwer, Johannes and Thyssen, Christoph and Vogelsang, Christoph}}, booktitle = {{Digitale Innovationen und Kompetenzen in der Lehramtsausbildung}}, editor = {{Gryl, Inga and Schacht, Florian and Beißwenger, Michael and Bullzek, Björn}}, pages = {{353--367}}, publisher = {{Universitätsverlag Rhein-Ruhr}}, title = {{{Lehre:digital – Erwerb digitaler Lehrkompetenz im fächerübergreifenden Kontext Chemie, Biologie und Physik}}}, year = {{2020}}, } @inbook{35666, author = {{Vogelsang, Christoph and Al-Kabbani, Daniel}}, booktitle = {{Hochschuldidaktik als Akteurin der Hochschulentwicklung}}, editor = {{Heuchemer, Sylvia and van Treeck, Timo and Szczyrba, Birgit}}, pages = {{113--118}}, publisher = {{wbv}}, title = {{{"Jetzt auch noch Werte vermitteln?" - Potentiale und Grenzen der Adaption schuldidaktischer Werkzeuge in der Hochschuldidaktik zur Integration von Wertefragen in die Hochschullehre}}}, year = {{2020}}, } @inbook{26631, author = {{Görel, Gamze and Finke, Nils and Hellmich, Frank}}, booktitle = {{Diversität und soziale Ungleichheit. Jahrbuch Grundschulforschung}}, editor = {{Skorsetz, Nina and Bonanati, Marina and Kucharz, Diemut}}, isbn = {{978-3-658-27528-0}}, pages = {{287--291}}, publisher = {{Springer VS}}, title = {{{Sichtweisen von Grundschullehrkräften auf die Qualität inklusiven Unterrichts}}}, doi = {{10.1007/978-3-658-27529-7_47}}, year = {{2020}}, } @article{35723, abstract = {{The development of renewable energies and smart mobility has profoundly impacted the future of the distribution grid. An increasing bidirectional energy flow stresses the assets of the distribution grid, especially medium voltage switchgear. This calls for improved maintenance strategies to prevent critical failures. Predictive maintenance, a maintenance strategy relying on current condition data of assets, serves as a guideline. Novel sensors covering thermal, mechanical, and partial discharge aspects of switchgear, enable continuous condition monitoring of some of the most critical assets of the distribution grid. Combined with machine learning algorithms, the demands put on the distribution grid by the energy and mobility revolutions can be handled. In this paper, we review the current state-of-the-art of all aspects of condition monitoring for medium voltage switchgear. Furthermore, we present an approach to develop a predictive maintenance system based on novel sensors and machine learning. We show how the existing medium voltage grid infrastructure can adapt these new needs on an economic scale.}}, author = {{Hoffmann, Martin W. and Wildermuth, Stephan and Gitzel, Ralf and Boyaci, Aydin and Gebhardt, Jörg and Kaul, Holger and Amihai, Ido and Forg, Bodo and Suriyah, Michael and Leibfried, Thomas and Stich, Volker and Hicking, Jan and Bremer, Martin and Kaminski, Lars and Beverungen, Daniel and zur Heiden, Philipp and Tornede, Tanja}}, issn = {{1424-8220}}, journal = {{Sensors}}, keywords = {{Electrical and Electronic Engineering, Biochemistry, Instrumentation, Atomic and Molecular Physics, and Optics, Analytical Chemistry}}, number = {{7}}, publisher = {{MDPI AG}}, title = {{{Integration of Novel Sensors and Machine Learning for Predictive Maintenance in Medium Voltage Switchgear to Enable the Energy and Mobility Revolutions}}}, doi = {{10.3390/s20072099}}, volume = {{20}}, year = {{2020}}, } @proceedings{35618, editor = {{Fechner, Sabine and Verhoeff, Roald}}, location = {{Bologna, Italy}}, pages = {{301--302}}, publisher = {{University of Bologna}}, title = {{{Science Teaching Processes (strand 3). In Levrini, O. & Tasquier, G. (eds.), The beauty and pleasure of understanding: engaging with contemporary challenges through science education. Electronic Proceedings of the ESERA 2019 Conference. }}}, year = {{2020}}, } @article{35770, author = {{Scheer, D. and Egener, L. and Laubenstein, Désirée and Melzer, C.}}, journal = {{In: International Journal of Inclusive Education}}, title = {{{Development and psychometric evaluation of an instrument measuring subjective definitions of inclusion (FEDI). International Journal of Inclusive Education.}}}, year = {{2020}}, } @article{35796, author = {{Stenzel, Nadja}}, journal = {{ DaZ Sekundarstufe: Deutsch als Zweitsprache - Konzepte und Materialien}}, title = {{{Verknüpfung von Fach- und Sprachlernen im Textilunterricht – Ein Anleitung zur Technik Weben schreiben}}}, year = {{2020}}, } @inproceedings{35814, author = {{Biehler, Rolf and Fleischer, Yannik and Budde, Lea and Frischemeier, Daniel and Gerstenberger, Dietrich and Podworny, Susanne and Schulte, Carsten}}, booktitle = {{New Skills in the Changing World of Statistics Education Proceedings of the Roundtable conference of the International Association for Statistical Education (IASE)}}, editor = {{Arnold, P.}}, publisher = {{ISI/IASE}}, title = {{{Data science education in secondary schools: Teaching and learning decision trees with CODAP and Jupyter Notebooks as an example of integrating machine learning into statistics education}}}, year = {{2020}}, } @article{34092, abstract = {{Block copolymer (BCP) self-assembly is a promising tool for next generation lithography as microphase separated polymer domains in thin films can act as templates for surface nanopatterning with sub-20 nm features. The replicated patterns can, however, only be as precise as their templates. Thus, the investigation of the morphology of polymer domains is of great importance. Commonly used analytical techniques (neutron scattering, scanning force microscopy) either lack spatial information or nanoscale resolution. Using advanced analytical (scanning) transmission electron microscopy ((S)TEM), we provide real space information on polymer domain morphology and interfaces between polystyrene (PS) and polymethylmethacrylate (PMMA) in cylinder- and lamellae-forming BCPs at highest resolution. This allows us to correlate the internal structure of polymer domains with line edge roughnesses, interface widths and domain sizes. STEM is employed for high-resolution imaging, electron energy loss spectroscopy and energy filtered TEM (EFTEM) spectroscopic imaging for material identification and EFTEM thickness mapping for visualisation of material densities at defects. The volume fraction of non-phase separated polymer species can be analysed by EFTEM. These methods give new insights into the morphology of polymer domains the exact knowledge of which will allow to improve pattern quality for nanolithography.}}, author = {{Bürger, Julius and Kunnathully, Vinay and Kool, Daniel and Lindner, Jörg and Brassat, Katharina}}, issn = {{2079-4991}}, journal = {{Nanomaterials}}, keywords = {{General Materials Science, General Chemical Engineering}}, number = {{1}}, publisher = {{MDPI AG}}, title = {{{Characterisation of the PS-PMMA Interfaces in Microphase Separated Block Copolymer Thin Films by Analytical (S)TEM}}}, doi = {{10.3390/nano10010141}}, volume = {{10}}, year = {{2020}}, } @article{34093, author = {{Riedl, Thomas and Kunnathully, V. S. and Trapp, A. and Langer, T. and Reuter, Dirk and Lindner, Jörg}}, issn = {{2475-9953}}, journal = {{Physical Review Materials}}, keywords = {{Physics and Astronomy (miscellaneous), General Materials Science}}, number = {{1}}, publisher = {{American Physical Society (APS)}}, title = {{{Strain-driven InAs island growth on top of GaAs(111) nanopillars}}}, doi = {{10.1103/physrevmaterials.4.014602}}, volume = {{4}}, year = {{2020}}, } @article{34088, author = {{Bürger, Julius and Riedl, Thomas and Lindner, Jörg}}, issn = {{0304-3991}}, journal = {{Ultramicroscopy}}, keywords = {{Instrumentation, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}}, publisher = {{Elsevier BV}}, title = {{{Influence of lens aberrations, specimen thickness and tilt on differential phase contrast STEM images}}}, doi = {{10.1016/j.ultramic.2020.113118}}, volume = {{219}}, year = {{2020}}, } @inbook{35836, abstract = {{Digitalisierung ist derzeit ein viel diskutiertes Thema. Mit ihr werden derart tief grei- fende Veränderungen der Gesellschaft und Arbeitswelt erwartet, dass sie häufig als digitale Revolution bezeichnet wird. Gleichzeitig wirft die Auseinandersetzung mit diesen antizipierten Veränderungen viele noch unbeantwortete Fragen auf. Diese umfassen unter anderem Überlegungen hinsichtlich des Substitutionspotenzials menschlicher Arbeit durch die Digitalisierung, die Frage nach der Ausgestaltung der Rolle des Menschen in der Industrie 4.0 und schließlich Erwägungen in Bezug auf die Vorbereitung und Begleitung von Beschäftigten in der digitalen Transformation. Der vorliegende Beitrag gibt Aufschluss über die Dimensionen der Digitalisierung und die derzeit diskutierten Entwicklungslinien; er befasst sich weiterhin mit den sich daraus ergebenden Herausforderungen und Bedeutungen für die industrielle Arbeit und die Beschäftigten. Abschließend werden daraus abzuleitende Implikationen für die berufliche und allgemeine Bildung diskutiert.}}, author = {{Berisha-Gawlowski, Angelina and Caruso, Carina and Goller, Michael and Harteis, Christian}}, booktitle = {{Digitalisierung am Übergang Schule Beruf Ansätze und Perspektiven in Arbeitsdomänen und beruflicher Förderung}}, editor = {{Heisler, Dietmar and Meier, Jörg}}, isbn = {{978-3-7639-6158-0}}, keywords = {{Digitalisierung, Industrie 4.0, Arbeit 4.0, berufliche Aus- und Weiterbildung, allgemeine Bildung / digitalization, industry 4.0, work 4.0, vocational education and training, general education}}, pages = {{33–51}}, publisher = {{wbv}}, title = {{{Auswirkungen der Digitalisierung industrieller Arbeit auf die berufliche und allgemeine Bildung}}}, doi = {{10.3278/6004725w}}, volume = {{56}}, year = {{2020}}, } @article{34091, author = {{Kunnathully, Vinay S. and Riedl, Thomas and Trapp, Alexander and Langer, Timo and Reuter, Dirk and Lindner, Jörg}}, issn = {{0022-0248}}, journal = {{Journal of Crystal Growth}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Condensed Matter Physics}}, publisher = {{Elsevier BV}}, title = {{{InAs heteroepitaxy on nanopillar-patterned GaAs (111)A}}}, doi = {{10.1016/j.jcrysgro.2020.125597}}, volume = {{537}}, year = {{2020}}, } @article{34090, author = {{Riedl, Thomas and Lindner, Jörg}}, issn = {{0038-1098}}, journal = {{Solid State Communications}}, keywords = {{Materials Chemistry, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Applicability of molecular statics simulation to partial dislocations in GaAs}}}, doi = {{10.1016/j.ssc.2020.113927}}, volume = {{314-315}}, year = {{2020}}, } @article{34089, author = {{Riedl, Thomas and Lindner, Jörg}}, issn = {{0038-1098}}, journal = {{Solid State Communications}}, keywords = {{Materials Chemistry, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Applicability of molecular statics simulation to partial dislocations in GaAs}}}, doi = {{10.1016/j.ssc.2020.113927}}, volume = {{314-315}}, year = {{2020}}, } @inproceedings{24020, abstract = {{Novel analog-to-digital converter (ADC) architectures are motivated by the demand for rising sampling rates and effective number of bits (ENOB). The main limitation on ENOB in purely electrical ADCs lies in the relatively high jitter of oscillators, in the order of a few tens of fs for state-of-the-art components. When compared to the extremely low jitter obtained with best-in-class Ti:sapphire mode-locked lasers (MLL), in the attosecond range, it is apparent that a mixed electrical-optical architecture could significantly improve the converters' ENOB. We model and analyze the ENOB limitations arising from optical sources in optically enabled, spectrally sliced ADCs, after discussing the system architecture and implementation details. The phase noise of the optical carrier, serving for electro-optic signal transduction, is shown not to propagate to the reconstructed digitized signal and therefore not to represent a fundamental limit. The optical phase noise of the MLL used to generate reference tones for individual slices also does not fundamentally impact the converted signal, so long as it remains correlated among all the comb lines. On the other hand, the timing jitter of the MLL, as also reflected in its RF linewidth, is fundamentally limiting the ADC performance, since it is directly mapped as jitter to the converted signal. The hybrid nature of a photonically enabled, spectrally sliced ADC implies the utilization of a number of reduced bandwidth electrical ADCs to convert parallel slices, resulting in the propagation of jitter from the electrical oscillator supplying their clock. Due to the reduced sampling rate of the electrical ADCs, as compared to the overall system, the overall noise performance of the presented architecture is substantially improved with respect to a fully electrical ADC.}}, author = {{Zazzi, Andrea and Müller, Juliana and Gudyriev, Sergiy and Marin-Palomo, Pablo and Fang, Dengyang and Scheytt, Christoph and Koos, Christian and Witzens, Jeremy}}, booktitle = {{21. ITG-Fachtagung Photonische Netze}}, publisher = {{VDE-Verlag}}, title = {{{Mode-locked laser timing jitter limitation in optically enabled frequency-sliced ADCs}}}, year = {{2020}}, } @article{24025, abstract = {{The effect of phase noise introduced by optical sources in spectrally-sliced optically enabled DACs and ADCs is modeled and analyzed in detail. In both data converter architectures, a mode-locked laser is assumed to provide an optical comb whose lines are used to either synthesize or analyze individual spectral slices. While the optical phase noise of the central MLL line as well as of other optical carriers used in the analyzed system architectures have a minor impact on the system performance, the RF phase noise of the MLL fundamentally limits it. In particular, the corresponding jitter of the MLL pulse train is transferred almost one-to-one to the system-level timing jitter of the data converters. While MLL phase noise can in principle be tracked and removed by electronic signal processing, this results in electric oscillator phase noise replacing the MLL jitter and is not conducive in systems leveraging the ultra-low jitter of low-noise mode-locked lasers. Precise analytical models are derived and validated by detailed numerical simulations.}}, author = {{Zazzi, Andrea and Müller, Juliana and Gudyriev, Sergiy and Marin-Palomo, Pablo and Fang, Dengyang and Scheytt, Christoph and Koos, Christian and Witzens, Jeremy}}, journal = {{Opt. Express}}, title = {{{Fundamental limitations of spectrally-sliced optically enabled data converters arising from MLL timing jitter}}}, doi = {{10.1364/OE.382832}}, volume = {{28}}, year = {{2020}}, } @inproceedings{24028, abstract = {{A 28 Gbps NRZ bang-bang clock and data recovery (CDR) chip for 100G PSM4 is presented. It exhibits an adaptable loop filter transfer function with independently tunable proportional and integral parameters. This allows to optimize the jitter transfer, jitter tolerance, and locking range of the CDR according to system requirements. The CDR represents a key component for a single-chip 8-channel electronic-photonic PSM4 transceiver. A CDR chip was manufactured in a 0.25 μm monolithic photonic BiCMOS technology. The core chip area is 0.51 mm 2 and it dissipates 330 mW from 2.5 V and 3.3 V power supplies.}}, author = {{Iftekhar, Mohammed and Gudyriev, Sergiy and Scheytt, Christoph}}, booktitle = {{2020 IEEE 20th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF)}}, publisher = {{IEEE}}, title = {{{28 Gbps Bang-Bang CDR for 100G PSM4 with Independently Tunable Proportional and Integral Parameters of the Loop Filter in 0.25 µm Photonic BiCMOS Technology}}}, doi = {{10.1109/SIRF46766.2020.9040190}}, year = {{2020}}, } @inproceedings{24026, abstract = {{In this paper we present a new system concept for an optoelectronic wireless phased array system. Like in a conventional phased array system with optical carrier distribution, optical fibers are used to distribute the carrier from the basestation to the wireless frontends. However in contrast to prior concepts, we propose to use an optical IQ return path from the wireless frontends back to the basestation. Furthermore, we reuse the optical carrier signal for the IQ return path which allows to avoid local oscillator lasers in the wireless frontends and reduces the hardware effort significantly. The system concept allows to integrate all components of an optoelectronic wireless frontend in a single chip using silicon photonics technology.}}, author = {{Kruse, Stephan and Kress, Christian and Scheytt, Christoph and Kurz, Heiko G. and Schneider, Thomas}}, booktitle = {{GeMiC 2020 - German Microwave Conference}}, title = {{{Analysis and Simulation of a Wireless Phased Array System with Optical Carrier Distribution and an Optical IQ Return Path}}}, year = {{2020}}, } @article{16301, author = {{Atorf, Bernhard and Mühlenbernd, Holger and Zentgraf, Thomas and Kitzerow, Heinz-Siegfried}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{6}}, pages = {{8898--8908}}, title = {{{All-optical switching of a dye-doped liquid crystal plasmonic metasurface}}}, doi = {{10.1364/oe.383877}}, volume = {{28}}, year = {{2020}}, } @inproceedings{24024, abstract = {{Recently it has been demonstrated that an optoelectronic phase-locked loop (OEPLL) using a mode-locked laser as a reference oscillator achieves significantly lower phase noise than conventional electronic frequency synthesizers. In this paper a concept for an OEPLL-based frequency synthesizer is presented and it is investigated how it can be used as a local oscillator (LO) for THz transceivers in order to improve the signal quality in THz wireless communications. The concept of the OEPLL is presented and it's measured phase noise is compared to the phase noise of a laboratory-grade electronic frequency synthesizer. The measured phase noise spectra of both synthesizers at 10 GHz are then used to model LO phase noise at 320 GHz. Based on models of generic zero-IF transmit and receive frontends, THz signals with different modulation formats and Baud rates are simulated at system level using the modeled LO phase noise for the two LO approaches. Finally, the results are compared.}}, author = {{Scheytt, Christoph and Wrana, Dominik and Bahmanian, Meysam and Kallfass, Ingmar}}, booktitle = {{2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)}}, location = {{Essen, Germany }}, title = {{{Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs}}}, doi = {{10.1109/IWMTS49292.2020.9166347}}, year = {{2020}}, } @inbook{35912, author = {{Lankeit, Elisa and Biehler, Rolf}}, booktitle = {{Proceedings of the Third Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2020, 12-19 September 2020)}}, editor = {{Hausberger, T. and Bosch, M. and Chelloughi, F.}}, publisher = {{University of Carthage and INDRUM}}, title = {{{“I only know the absolute value function”–About students’ concept images and example spaces concerning continuity and differentiability}}}, year = {{2020}}, } @inbook{35911, author = {{Lankeit, Elisa and Bauer, T. and Biehler, Rolf}}, booktitle = {{Beiträge zum Mathematikunterricht 2020}}, editor = {{Siller, H.-S. and Weigel, W. and Wörler, J. F.}}, pages = {{1361--1364}}, publisher = {{WTM-Verlag}}, title = {{{Votingfragen in den Übungen zur Analysis – Wirkung verschiedener Einsatzszenarien}}}, doi = {{10.17877/DE290R-21396}}, year = {{2020}}, } @misc{35929, author = {{Caruso, Carina}}, booktitle = {{ Das wissenschaftlich-religionspädagogische Lexikon im Internet}}, editor = {{Zimmermann, Mirjam and Lindler, Heike}}, title = {{{Praxissemester }}}, year = {{2020}}, } @article{35935, author = {{Caruso, Carina}}, journal = {{katholisch.de, Kolumne „Mein Religionsunterricht“. }}, title = {{{ Der Weg zur Theologie-Professur ist hart – gerade für Religionslehrer!}}}, year = {{2020}}, } @phdthesis{35956, author = {{Schwabl, Franziska}}, publisher = {{Eusl-Verlagsgesellschaft mbH}}, title = {{{Inszenierungen im digitalen Bild. Eine Rekonstruktion der Selfie-Praktiken Jugendlicher mittels der Dokumentarischen Bildinterpretation.}}}, year = {{2020}}, } @article{35968, author = {{Schwabl, Franziska}}, journal = {{bwp@Berufs-und Wirtschaftspädagogik – online}}, pages = {{1--24}}, title = {{{Fotografien als Zugang zur Lebenswelt Jugendlicher. Eine Analyse der digitalen Inszenierungspraktiken Jugendlicher im berufsschulischen Übergangssystem.}}}, volume = {{38}}, year = {{2020}}, } @article{35701, author = {{Lünne, Steffen and Schnell, Susanne and Biehler, Rolf}}, issn = {{0261-9768}}, journal = {{European Journal of Teacher Education}}, keywords = {{Education}}, number = {{5}}, pages = {{688--705}}, publisher = {{Informa UK Limited}}, title = {{{Motivation of out-of-field teachers for participating in professional development courses in mathematics}}}, doi = {{10.1080/02619768.2020.1793950}}, volume = {{44}}, year = {{2020}}, } @inbook{35808, author = {{Barzel, Bärbel and Biehler, Rolf}}, booktitle = {{Professional development and knowledge of mathematics teachers}}, editor = {{Zehetmeier, Stefan and Potari, Despina and Ribeiro, Miguel}}, pages = {{163–192}}, publisher = {{Routledge}}, title = {{{Theory-Based Design of Professional Development for Upper Secondary Teachers–Focusing on the Content-Specific Use of Digital Tools}}}, year = {{2020}}, } @inbook{35811, author = {{Biehler, Rolf and Durand-Guerrier, Viviane}}, booktitle = {{Proceedings of the Third Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2020, 12-19 September 2020)}}, editor = {{Hausberger, T. and Bosch, M. and Chelloughi, F.}}, keywords = {{Number Theory, Algebra, Discrete Mathematics, Logic, Research in University Mathematics Edcuation}}, publisher = {{University of Carthage and INDRUM}}, title = {{{University Mathematics Didactic Research on Number Theory, Algebra, Discrete Mathematics, Logic}}}, year = {{2020}}, } @inbook{35821, author = {{Budde, Lea and Frischemeier, Daniel and Biehler, Rolf and Fleischer, Yannik and Gerstenberger, Dietrich and Podworny, Susanne and Schulte, Carsten}}, booktitle = {{New Skills in the Changing World of Statistics Education: Proceedings of the Roundtable conference of the International Association for Statistical Education (IASE), July 2020}}, editor = {{Arnold, P.}}, publisher = {{ISI/IASE}}, title = {{{Data Science Education in Secondary School: How to Develop Statistical Reasoning When Exploring Data Using CODAP}}}, year = {{2020}}, }