@article{56255, author = {{Kempen, Leander and Biehler, Rolf}}, issn = {{1863-9690}}, journal = {{ZDM}}, number = {{5}}, pages = {{731--746}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Fostering first-year pre-service teachers’ proof competencies}}}, doi = {{10.1007/s11858-019-01035-x}}, volume = {{51}}, year = {{2019}}, } @inbook{56256, author = {{Lankeit, Elisa and Biehler, Rolf}}, booktitle = {{Hanse-Kolloquium zur Hochschuldidaktik der Mathematik 2018}}, editor = {{Klinger, M. and Schüler-Meyer, A. and Wessel, L.}}, pages = {{117--131}}, publisher = {{WTM-Verlag}}, title = {{{Vorstellung einer Aufgabe zu den Zusammenhängen verschiedener Differenzierbarkeitsbegriffe im Mehrdimensionalen}}}, year = {{2019}}, } @inbook{56789, author = {{Nieszporek, Ralf and Biehler, Rolf and Griese, Birgit}}, booktitle = {{Looking back, looking forward. Proceedings of the Tenth International Conference on Teaching Sta-tistics (ICOTS10, July, 2018), Kyoto, Japan}}, editor = {{Sorto, M.A. and White, A. and Guyot, L.}}, publisher = {{International Statistical Institute}}, title = {{{Developments of teachers’ knowledge facets in teaching statistics with digital tools measured with retrospective self-assessment}}}, year = {{2019}}, } @inproceedings{56246, author = {{Biehler, Rolf}}, booktitle = {{Calculus in upper secondary and beginning university mathematics—Conference proceedings}}, editor = {{Monaghan, J. and Nardi, E. and Dreyfus, T.}}, pages = {{4–17}}, publisher = {{MatRIC}}, title = {{{The transition from calculus and to analysis—Conceptual analyses and supporting steps for students}}}, year = {{2019}}, } @inproceedings{14848, abstract = {{Data Science und Big Data durchdringt in ihren diversen Facetten unser tägliches Leben– kaum ein Tag, an dem nicht verschiedene Meldungen über technische Innovationen, Einsatzmöglichkeiten von Künstlicher Intelligenz (KI) und Maschinelles Lernen (ML) und ihre ethischen sowie gesellschaftlichen Implikationen in den unterschiedlichen Medien diskutiert werden. Aus diesem Grund erscheint es uns immens wichtig, diese Fragestellungen und Technologien auch in den Unterricht der Sekundarstufe II zu integrieren. Um diesem Anspruch gerecht zu werden, entwickelten wir im Rahmen eines Forschungsprojekts ein Curriculum, welches wir als konkretes Unterrichtskonzept innerhalb eines Projektkurses erprobt, evaluiert weiterentwickelt wird. Bei der Implementierung entschieden wir uns, zur aktiven Umsetzung von Konzepten von ML als Plattform Jupyter Notebook mit Python zu verwenden, da diese Umgebung durch die Verbindung von Code und Hypertext zur Dokumentation und Erklärung Medienbrüche im Lernprozess verringern kann. Zudem ist Python zur Implementierung der Methoden von ML sehr gut geeignet. Im Themenfeld des ML als Teilgebiet der KI legen wir den Fokus auf zwei unterschiedliche Lernverfahren um verschieden Aspekte von ML, u.A. wie Nachvollziehbarkeit unter gesellschaftlichen Gesichtspunkten zu vermitteln. Diese sind Künstliche Neuronale Netze (bei denen die Berechnung und Bedeutung der Kantengewichte zwischen den Neuronen für den Menschen insbesondere bei komplexeren Netzen kaum nachvollziehbar erschienen) und Entscheidungsbäume (strukturierte und gerichtete Bäume zur Darstellung von Entscheidungsregeln, welche auch für Schülerinnen und Schüler meist gut nachvollziehbares und verständliches KI-Modell darstellen). In diesem Workshop stellen wir konkrete Umsetzungsbeispiele inklusive der Programmierung für beide Verfahren mit Jupyter Notebook und Python als Teil einer Unterrichtssequenz vor und diskutieren diese.}}, author = {{Schlichtig, Michael and Opel, Simone and Schulte, Carsten and Biehler, Rolf and Frischemeier, Daniel and Podworny, Susanne and Wassong, Thomas}}, booktitle = {{Informatik für alle}}, editor = {{Pasternak, Arno}}, isbn = {{978-3-88579-682-4}}, location = {{Dortmund, Germany}}, pages = {{ 385 }}, publisher = {{Gesellschaft für Informatik}}, title = {{{Maschinelles Lernen im Unterricht mit Jupyter Notebook}}}, year = {{2019}}, } @inproceedings{59781, author = {{Petrov, Dmitry and Meyers, Thorsten and Reker, Julia and Hilleringmann, Ulrich}}, booktitle = {{Fifth Conference on Sensors, MEMS, and Electro-Optic Systems}}, editor = {{du Plessis, Monuko}}, publisher = {{SPIE}}, title = {{{Doctor blade system for the deposition of thin semiconducting films}}}, doi = {{10.1117/12.2501307}}, year = {{2019}}, } @inproceedings{39943, author = {{Schmidt, Marco and Petrov, Dmitry and Hedayat, Christian and Hilleringmann, Ulrich and Otto, Thomas}}, booktitle = {{Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems}}, pages = {{1--4}}, title = {{{Wireless power supply for a RFID based sensor platform}}}, year = {{2019}}, } @inproceedings{39944, author = {{Petrov, Dmitry and Schmidt, Marco and Hilleringmann, Ulrich and Hedayat, Christian and Otto, Thomas}}, booktitle = {{Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems}}, pages = {{1--4}}, title = {{{RFID based sensor platform for industry 4.0 application}}}, year = {{2019}}, } @inproceedings{64361, author = {{Neutsch, Krisztian and Hofmann, Martin R. and Gerhardt, Nils Christopher and Schnitzler, Lena and Tranelis, Marlon J.}}, booktitle = {{Practical Holography XXXIII: Displays, Materials, and Applications}}, title = {{{Three-dimensional particle localization with common-path digital holographic microscopy}}}, doi = {{10.1117/12.2509448}}, year = {{2019}}, } @inbook{64360, author = {{Gerhardt, Nils Christopher and Žutić, Igor and Lee, Jeongsu and Gøthgen, Christian and Farla, Paulo E., Junior and Xu, Gaofeng and Sipahi, Guilherme M.}}, booktitle = {{Nanoscale spintronics and applications}}, pages = {{499 -- 540}}, title = {{{Semiconductor spin-lasers}}}, year = {{2019}}, } @article{59687, abstract = {{Lasers have both ubiquitous applications and roles as model systems in which non-equilibrium and cooperative phenomena can be elucidated1. The introduction of novel concepts in laser operation thus has potential to lead to both new applications and fundamental insights2. Spintronics3, in which both the spin and the charge of the electron are used, has led to the development of spin-lasers, in which charge-carrier spin and photon spin are exploited. Here we show experimentally that the coupling between carrier spin and light polarization in common semiconductor lasers can enable room-temperature modulation frequencies above 200 gigahertz, exceeding by nearly an order of magnitude the best conventional semiconductor lasers. Surprisingly, this ultrafast operation of the resultant spin-laser relies on a short carrier spin relaxation time and a large anisotropy of the refractive index, both of which are commonly viewed as detrimental in spintronics3 and conventional lasers4. Our results overcome the key speed limitations of conventional directly modulated lasers and offer a prospect for the next generation of low-energy ultrafast optical communication.}}, author = {{Lindemann, Markus and Xu, Gaofeng and Pusch, Tobias and Michalzik, Rainer and Hofmann, Martin R. and Žutić, Igor and Gerhardt, Nils Christopher}}, issn = {{0028-0836}}, journal = {{Nature}}, number = {{7751}}, pages = {{212--215}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Ultrafast spin-lasers}}}, doi = {{10.1038/s41586-019-1073-y}}, volume = {{568}}, year = {{2019}}, } @unpublished{64769, author = {{Nikitin, Natalie}}, title = {{{Measurable regularity of infinite-dimensional Lie groups based on Lusin measurability}}}, year = {{2019}}, } @article{64756, author = {{Walter, Boris}}, issn = {{0019-3577}}, journal = {{Indagationes Mathematicae}}, keywords = {{58D05, 57S05, 22E65, 58D15, 58B10}}, number = {{4}}, pages = {{669–705}}, title = {{{Weighted diffeomorphism groups of Riemannian manifolds}}}, doi = {{10.1016/j.indag.2019.03.003}}, volume = {{30}}, year = {{2019}}, } @article{64630, author = {{Glöckner, Helge}}, issn = {{0008-414X}}, journal = {{Canadian Journal of Mathematics}}, keywords = {{22E65, 22A05, 22E67, 46A13, 46M40, 58D05}}, number = {{1}}, pages = {{131–152}}, title = {{{Completeness of infinite-dimensional Lie groups in their left uniformity}}}, doi = {{10.4153/CJM-2017-048-5}}, volume = {{71}}, year = {{2019}}, } @inbook{62712, author = {{Opel, Simone and Schlichtig, Michael and Schulte, Carsten and Biehler, Rolf and Frischemeier, Daniel and Podworny, Susanne and Wassong, Thomas}}, booktitle = {{Informatik für alle - 18. GI-Fachtagung Informatik und Schule, 16.-18. September 2019, Dortmund}}, editor = {{Pasternak, A.}}, isbn = {{978-3-88579-682-4}}, pages = {{285–294}}, publisher = {{Gesellschaft für Informatik}}, title = {{{Entwicklung und Reflexion einer Unterrichtssequenz zum Maschinellen Lernen als Aspekt von Data Science in der Sekundarstufe II}}}, doi = {{10.18420/infos2019-c14}}, year = {{2019}}, } @misc{8482, author = {{Jurgelucks, Benjamin and Schulze, Veronika and Feldmann, Nadine and Claes, Leander}}, title = {{{Arbitrary sensitivity for inverse problems in piezoelectricity}}}, year = {{2019}}, } @inproceedings{12952, author = {{Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}}, keywords = {{piezoelectric materials, piezoelectric properties, DC bias field, non-linear material parameters}}, location = {{Nürnberg}}, publisher = {{AMA Service GmbH}}, title = {{{A DC bias approach to the characterisation of non-linear material parameters of piezoelectric ceramics}}}, doi = {{10.5162/sensoren2019/5.1.2}}, year = {{2019}}, } @inproceedings{21462, abstract = {{This paper presents a new methodology by using a multiple coil array for energy transmission. The complex current strengths of the transmitting coil array are calculated by having the knowledge about of the mutual inductances and the symmetries of the transmitting coil array, so that its resulting magnetic field mainly penetrates only the receiving coil and is strongly attenuated outside. This method is used for an optimized wireless energy transmission but can also be implemented for other inductive applications.}}, author = {{Lange, Sven and Büker, Maik-Julian and Sievers, Denis and Hedayat, Christian and Förstner, Jens and Hilleringmann, Ulrich and Otto, Thomas}}, booktitle = {{Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems}}, isbn = {{978-3-8007-4919-5}}, keywords = {{tet_enas}}, location = {{Barcelona, Spain }}, pages = {{1--4}}, publisher = {{VDE VERLAG GMBH}}, title = {{{Method of superposing a multiple driven magnetic field to minimize stray fields around the receiver for inductive wireless power transmission}}}, year = {{2019}}, } @inbook{34123, abstract = {{Through technological progress during recent years, Augmented Reality (AR) technology can be used on ordinary smartphones with applications (Apps) in many formal and informal learning environments and educational institutions (e.g. [1, 2]). It is emerging as a suitable technology for teaching psychomotor skills. Simultaneously, gamification has become increasingly popular in the teaching field, providing famous examples, such as Duolingo (for the acquisition of foreign languages) or Codecademy (for learning programming languages) [3]. Many papers have already highlighted the beneficial aspects of gamification and AR for education and teaching (e.g. [1, 2, 4, 5]. While gamification is useful for improving students’ motivation and engagement, AR can be applied to teach them operational skills without any time, costs and place constraints. Hence, this opens up numerous possibilities and forms to combine these two aspects (AR and gamification) for higher education teaching. However, there has been less research focusing on how gamification and AR can be combined in a useful manner to keep up students’ initial motivation aroused through novelty effects of AR learning environments. Accordingly, this paper will present such a gamification concept for an AR based virtual preparation laboratory training to overcome the risk of demotivation, once AR will settle as a mainstream technology such as learning videos. The focus of the AR-App – presently being developed at the University of Paderborn – is to remedy the students’ lack of practical skills when operating electro-technical laboratory equipment during their compulsory laboratory training.}}, author = {{Alptekin, Mesut and Temmen, Katrin}}, booktitle = {{The Challenges of the Digital Transformation in Education}}, isbn = {{9783030119317}}, issn = {{2194-5357}}, keywords = {{Augmented Reality, Laboratory Training, Engineering Education, Gamification}}, location = {{Kos Island, Greece}}, publisher = {{Springer International Publishing}}, title = {{{Gamification in an Augmented Reality Based Virtual Preparation Laboratory Training}}}, doi = {{10.1007/978-3-030-11932-4_54}}, year = {{2019}}, } @inproceedings{24052, abstract = {{This paper presents a broadband track-and-hold amplifier (THA) based on switched-emitter-follower (SEF) topology. The THA exhibits a record 3dB small-signal bandwidth of 70 GHz. With the high sampling rate of 40 GS/s, it achieves an effective number of bits (ENOB) of 7.5 bit at 1 GHz input frequency and an ENOB of >5 bit up to 15 GHz input frequency. The chip was fabricated in a 130 nm SiGe BiCMOS technology from IHP (SG13G2). It draws 110 mA from a -4 V supply voltage, dissipating 440 mW.}}, author = {{Wu, Liang and Weizel, Maxim and Scheytt, Christoph}}, booktitle = {{26th IEEE International Conference on Electronics Circuits and Systems (ICECS)}}, title = {{{A 70 GHz Small-signal Bandwidth 40 GS/s Track-and-Hold Amplifier in 130 nm SiGe BiCMOS Technology}}}, doi = {{10.1109/ICECS46596.2019.8965046}}, year = {{2019}}, }