@article{48580, abstract = {{Abstract Sandwich packings represent new separation column internals, with a potential to intensify mass transfer. They comprise two conventional structured packings with different specific geometrical surface areas. In this work, the complex fluid dynamics in sandwich packings is modeled using a novel approach based on a one-dimensional, steady momentum balance of the liquid and gas phases. The interactions between the three present phases (gas, liquid, and solid) are considered by closures incorporated into the momentum balance. The formulation of these closures is derived from two fluid-dynamic analogies for the film and froth flow patterns. The adjustable parameters in the closures are regressed for the film flow using dry pressure drop measurements and liquid hold-up data in trickle flow conditions. For the froth flow, the tuning parameters are fitted to overall pressure drop measurements and local liquid hold-up data acquired from ultra-fast X-ray tomography (UFXCT). The model predicts liquid hold-up and pressure drop data with an average relative deviation of 16.4 % and 19 %, respectively. Compared to previous fluid dynamic models for sandwich packings, the number of adjustable parameters could be reduced while maintaining comparable accuracy.}}, author = {{Franke, Patrick and Shabanilemraski, Iman and Schubert, Markus and Hampel, Uwe and Kenig, Eugeny Y.}}, issn = {{1934-2659}}, journal = {{Chemical Product and Process Modeling}}, keywords = {{Modeling and Simulation, General Chemical Engineering}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{A new approach to model the fluid dynamics in sandwich packings}}}, doi = {{10.1515/cppm-2023-0054}}, year = {{2023}}, } @misc{48626, abstract = {{Die Erfindung betrifft einen elektrooptischen Mischer (1) mit elektrischem Ausgang, aufweisend: • eine Photodiode (PD), • einen ersten Anschluss, • einen zweiten Anschluss, • wobei die Anschlüsse eine erste Spannungsversorgung (V1) und eine zweite Spannungsversorgung (V2) oder eine erste Stromversorgung (I1) und eine zweite Stromversorgung (I2) anschließbar ist, • einen Anschluss für ein Kleinsignal-Massepotential, • ein erstes Teilanpassungsnetzwerk (Z2, Z4), welches auf der Anodenseite der Photodiode (PD) angeordnet ist, wobei ein Teil des ersten Teilanpassungsnetzwerkes (Z2) mit dem Anschluss für die zweite Spannungsversorgung (V2) schaltbar (S2) verbindbar ist, und wobei ein anderer Teil des ersten Teilanpassungsnetzwerkes (Z4) mit dem Anschluss für das Kleinsignal-Massepotential schaltbar (S2') verbindbar ist, • ein zweites Teilanpassungsnetzwerk (Z1, Z3), welches auf der Kathodenseite der Photodiode (PD) angeordnet ist, wobei ein Teil des zweiten Teilanpassungsnetzwerkes (Z1) mit dem Anschluss für die erste Spannungsversorgung (V1) schaltbar (S1) verbindbar ist, und wobei ein anderer Teil des zweiten Teilanpassungsnetzwerkes (Z3) mit dem Anschluss für das Kleinsignal-Massepotential schaltbar (S1') verbindbar ist, • ein erstes entkoppelndes Element (C1) angeordnet auf der Kathodenseite und ein zweites entkoppelndes Element (C2) angeordnet auf der Anodenseite der Photodiode (PD), • wobei zwischen den von der Photodiode (PD) abgewandten Seiten des ersten entkoppelnden Elementes (C1) und des zweiten entkoppelnden Elementes (C2) im Betrieb einelektrisches Ausgangssignal bereitgestellt werden kann.}}, author = {{Kruse, Stephan and Scheytt, J. Christoph}}, title = {{{Elektrooptischer Mischer}}}, year = {{2023}}, } @inproceedings{47521, abstract = {{This paper experimentally investigates and interprets the e®ects of noise and non- linearity in a silicon photonic optical test structure. For the analysis di®erent optoelectronic phase noise measurement techniques are used. Our tests focuses on the performance of integrated opti- cal test structures using femtosecond pulses in the 1550nm spectral range. A primary objective is to understand the behaviour of silicon photonic waveguides that can be further employed in the implementation of an optoelectronic phase-locked loop (OEPLL) in silicon photonics technology. A comparison of our results, as well as a discussion on the di®erent optoelectronic phase noise measurement techniques are presented. Our ¯ndings provide insights that can be leveraged to optimize the design and performance of ultra-low phase noise on-chip OEPLL systems locking to mode-locked laser (MLL) signals. In the future such systems can be essential for advanced communication and sensing applications.}}, author = {{Surendranath Shroff, Vijayalakshmi and Kress, Christian and Bahmanian, Meysam and Scheytt, J. Christoph}}, booktitle = {{2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), }}, location = {{Prague, Czech Republic}}, publisher = {{IEEE}}, title = {{{Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics}}}, doi = {{10.1109/PIERS59004.2023.10221473}}, year = {{2023}}, } @inproceedings{48760, author = {{Wehde, Janis and Bloh, Bea}}, location = {{Potsdam}}, title = {{{Methoden zur Förderung von Kompetenzen für eine demokratische Kultur - Schriftliche Reflexionen von Lehramtsstudierenden aus bildungswissenschaftlichen Seminaren}}}, year = {{2023}}, } @article{46354, author = {{Homt, Martina and Bloh, Bea}}, journal = {{Lehrerbildung auf dem Prüfstand}}, number = {{1}}, pages = {{114--131}}, title = {{{Der formelle Diskurs Forschenden Lernens in der Lehrerbildung. Ein Blick zurück nach vorn}}}, volume = {{16}}, year = {{2023}}, } @inproceedings{48281, abstract = {{ We propose a general framework to compute the word error rate (WER) of ASR systems that process recordings containing multiple speakers at their input and that produce multiple output word sequences (MIMO). Such ASR systems are typically required, e.g., for meeting transcription. We provide an efficient implementation based on a dynamic programming search in a multi-dimensional Levenshtein distance tensor under the constraint that a reference utterance must be matched consistently with one hypothesis output. This also results in an efficient implementation of the ORC WER which previously suffered from exponential complexity. We give an overview of commonly used WER definitions for multi-speaker scenarios and show that they are specializations of the above MIMO WER tuned to particular application scenarios. We conclude with a discussion of the pros and cons of the various WER definitions and a recommendation when to use which.}}, author = {{von Neumann, Thilo and Boeddeker, Christoph and Kinoshita, Keisuke and Delcroix, Marc and Haeb-Umbach, Reinhold}}, booktitle = {{ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}}, keywords = {{Word Error Rate, Meeting Recognition, Levenshtein Distance}}, publisher = {{IEEE}}, title = {{{On Word Error Rate Definitions and Their Efficient Computation for Multi-Speaker Speech Recognition Systems}}}, doi = {{10.1109/icassp49357.2023.10094784}}, year = {{2023}}, } @inproceedings{48275, abstract = {{MeetEval is an open-source toolkit to evaluate all kinds of meeting transcription systems. It provides a unified interface for the computation of commonly used Word Error Rates (WERs), specifically cpWER, ORC WER and MIMO WER along other WER definitions. We extend the cpWER computation by a temporal constraint to ensure that only words are identified as correct when the temporal alignment is plausible. This leads to a better quality of the matching of the hypothesis string to the reference string that more closely resembles the actual transcription quality, and a system is penalized if it provides poor time annotations. Since word-level timing information is often not available, we present a way to approximate exact word-level timings from segment-level timings (e.g., a sentence) and show that the approximation leads to a similar WER as a matching with exact word-level annotations. At the same time, the time constraint leads to a speedup of the matching algorithm, which outweighs the additional overhead caused by processing the time stamps.}}, author = {{von Neumann, Thilo and Boeddeker, Christoph and Delcroix, Marc and Haeb-Umbach, Reinhold}}, booktitle = {{Proc. CHiME 2023 Workshop on Speech Processing in Everyday Environments}}, keywords = {{Speech Recognition, Word Error Rate, Meeting Transcription}}, location = {{Dublin}}, title = {{{MeetEval: A Toolkit for Computation of Word Error Rates for Meeting Transcription Systems}}}, year = {{2023}}, } @inproceedings{47128, author = {{Cord-Landwehr, Tobias and Boeddeker, Christoph and Zorilă, Cătălin and Doddipatla, Rama and Haeb-Umbach, Reinhold}}, booktitle = {{ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}}, location = {{Rhodes}}, publisher = {{IEEE}}, title = {{{Frame-Wise and Overlap-Robust Speaker Embeddings for Meeting Diarization}}}, doi = {{10.1109/icassp49357.2023.10095370}}, year = {{2023}}, } @inproceedings{47129, author = {{Cord-Landwehr, Tobias and Boeddeker, Christoph and Zorilă, Cătălin and Doddipatla, Rama and Haeb-Umbach, Reinhold}}, booktitle = {{INTERSPEECH 2023}}, publisher = {{ISCA}}, title = {{{A Teacher-Student Approach for Extracting Informative Speaker Embeddings From Speech Mixtures}}}, doi = {{10.21437/interspeech.2023-1379}}, year = {{2023}}, } @inproceedings{54439, author = {{Boeddeker, Christoph and Cord-Landwehr, Tobias and von Neumann, Thilo and Haeb-Umbach, Reinhold}}, booktitle = {{7th International Workshop on Speech Processing in Everyday Environments (CHiME 2023)}}, publisher = {{ISCA}}, title = {{{Multi-stage diarization refinement for the CHiME-7 DASR scenario}}}, doi = {{10.21437/chime.2023-10}}, year = {{2023}}, } @inproceedings{48390, author = {{Berger, Simon and Vieting, Peter and Boeddeker, Christoph and Schlüter, Ralf and Haeb-Umbach, Reinhold}}, booktitle = {{INTERSPEECH 2023}}, publisher = {{ISCA}}, title = {{{Mixture Encoder for Joint Speech Separation and Recognition}}}, doi = {{10.21437/interspeech.2023-1815}}, year = {{2023}}, } @article{58608, abstract = {{Interfacial reactions at the polycarbonate (PC)/FeCr-alloy interface during melt contact were studied as function of the Fe:Cr ratio within the alloy. Thin Fe/Cr films with lateral composition gradients were deposited by magnetron sputtering; the analysis of the films was done with microscopy and X-ray photoelectron spectroscopy (XPS). The local interfacial polymeric film formation could be therefore directly correlated with the Fe:Cr ratio. The local thickness and structure of the formed polycarbonate residue was analyzed by means of imaging ellipsometry, atomic force microscopy as well as Fourier-transform infrared spectroscopy under grazing incidence and XPS. Moreover, confocal fluorescence microscopy of the PC melt/alloy interface could reveal the formation of minor degradation products in the interphase region. The results show that already an Fe:Cr ratio of 2 : 1 leads to a strong inhibition of the thermal degradation in comparison to the unalloyed iron, and that in general, the enrichment of chromium in the passive film leads to an effective suppression of interfacial PC degradation. The data contributes to improving the mechanistic understanding of the role of iron during this process. Additionally, a critical concentration of chromium in the alloys used for PC processing can be deduced.}}, author = {{Theile-Rasche, Chantal and Meng, T. and de los Arcos de Pedro, Maria Teresa and Grundmeier, Guido}}, issn = {{2523-3971}}, journal = {{SN Applied Sciences}}, number = {{10}}, pages = {{1–12}}, title = {{{Analysis of polycarbonate degradation at melt/FeCr-alloy interfaces as a function of the alloy composition by means of combinatorial thin film chemistry}}}, doi = {{10.1007/s42452-023-05441-5}}, volume = {{5}}, year = {{2023}}, } @article{58609, abstract = {{Plasma Processes and Polymers is a plasma journal focusing on the interdisciplinary field of low temperature plasma science.}}, author = {{de los Arcos de Pedro, Maria Teresa and Awakowicz, Peter and Böke, Marc and Boysen, Nils and Brinkmann, Ralf Peter and Dahlmann, Rainer and Devi, Anjana and Eremin, Denis and Franke, Jonas and Gergs, Tobias and Jenderny, Jonathan and Kemaneci, Efe and Kühne, Thomas D. and Kusmierz, Simon and Mussenbrock, Thomas and Rubner, Jens and Trieschmann, Jan and Wessling, Matthias and Xie, Xiaofan and Zanders, David and Zysk, Frederik and Grundmeier, Guido}}, issn = {{1612-8850}}, journal = {{PLASMA PROCESSES AND POLYMERS}}, pages = {{e2300186}}, title = {{{PECVD and PEALD on polymer substrates (part II): Understanding and tuning of barrier and membrane properties of thin films}}}, doi = {{10.1002/ppap.202300186}}, year = {{2023}}, } @article{58610, author = {{de los Arcos de Pedro, Maria Teresa and Awakowicz, Peter and Benedikt, Jan and Biskup, Beatrix and Böke, Marc and Boysen, Nils and Buschhaus, Rahel and Dahlmann, Rainer and Devi, Anjana and Gergs, Tobias and Jenderny, Jonathan and von Keudell, Achim and Kühne, Thomas D. and Kusmierz, Simon and Müller, Hendrik and Mussenbrock, Thomas and Trieschmann, Jan and Zanders, David and Zysk, Frederik and Grundmeier, Guido}}, issn = {{1612-8850}}, journal = {{PLASMA PROCESSES AND POLYMERS}}, pages = {{e2300150}}, title = {{{PECVD and PEALD on polymer substrates (part I): Fundamentals and analysis of plasma activation and thin film growth}}}, doi = {{10.1002/ppap.202300150}}, year = {{2023}}, } @article{58607, author = {{Xie, Xiaofan and Zanders, David and Preischel, Florian and de los Arcos de Pedro, Maria Teresa and Devi, Anjana and Grundmeier, Guido}}, issn = {{0142-2421}}, journal = {{Surface and Interface Analysis}}, title = {{{Complementary spectroscopic and electrochemical analysis of the sealing of micropores in hexamethyldisilazane plasma polymer films by Al 2 O 3 atomic layer deposition}}}, doi = {{10.1002/sia.7256}}, year = {{2023}}, } @inbook{58619, author = {{Dehn, Freya}}, booktitle = {{Berufsbildender Deutschunterricht im Kontext von Migration und Einwanderung}}, editor = {{Becker, Karina and Kofer, Martina}}, pages = {{193--208}}, publisher = {{Waxmann}}, title = {{{Das Lesen von Fachtexten in der beruflichen Schule der Migrationsgesellschaft. Ein aktuelles Thema für den Deutschunterricht oder auch alle anderen Fächer?}}}, doi = {{https://doi.org/10.31244/9783830997948}}, year = {{2023}}, } @article{47009, abstract = {{We present a fully integrated radio frequency identifications transponder chip operating at 5.8 GHz, which is compatible with the class-1 generation-2 of the Electronic Product Code protocol (EPC-C1 G2). The tag chip including the analog front-end and the digital baseband processor, are designed in the sub-threshold regime (0.5 V) with a total supply current of less than 50 μA. As a power scavenging unit, a single-stage differential-drive rectifier structure is designed and fabricated with standard threshold voltage (SVT) MOS elements in a commercial 65-nm CMOS process, to provide 0.8 V of rectified voltage. Measurements performed on the fabricated single-stage structure show a maximum power conversion efficiency of 69.6% for a 22 kΩ load and a sensitivity of -12.5 dBm, which corresponds to more than 1 m of reading range. The power conversion efficiency at this range is about 64%.}}, author = {{Haddadian, Sanaz and Scheytt, J. Christoph and von Bögel, Gerd and Grenter, Thorben}}, issn = {{2469-7281}}, journal = {{ IEEE Journal of Radio Frequency Identification}}, publisher = {{IEEE}}, title = {{{A Sub-Threshold Microwave RFID Tag Chip, Compatible With RFID MIMO Reader Technology}}}, doi = {{10.1109/JRFID.2023.3308332}}, year = {{2023}}, } @inproceedings{46646, author = {{Althaus, Maike and Grieger, Nicole and Vorbohle, Christian and Müller, Michelle and Kundisch, Dennis}}, booktitle = {{Proceedings of the 15th Mediterranean Conference on Information Systems (MCIS)}}, location = {{Madrid, Spanien}}, title = {{{Business Models for Cultural Event Platforms - A Taxonomy Approach}}}, year = {{2023}}, } @phdthesis{58680, abstract = {{Heutige On-Board-Ladewandler sind typischerweise aus zwei Stufen aufgebaut, die über einen Spannungszwischenkreis verbunden sind. Als erste Stufe kommt ein PFC-Gleichrichter zum Einsatz, der die Anforderungen an den Netzstrom bezüglich Oberschwingungsgehalt und Leistungsfaktor sicherstellt. Für die zweite Wandler-Stufe hat sich in den vergangenen Jahren ein LLC-Resonanzwandler qualifiziert, der die Ladeleistung an die Traktionsbatterie galvanisch getrennt überträgt. Der Zwischenkreis besteht aus einer Bank von Elektrolytkondensatoren, in denen die pulsierende Eingangsleistung zwischengespeichert wird. Die Kondensatoren machen einen erheblichen Teil des Lader-Volumens aus und altern schnell, was insbesondere für Ladewandler an Bord von Elektrofahrzeugen unerwünscht ist. In der vorliegenden Arbeit wird untersucht, ob diese zweistufige Struktur verworfen werden kann, indem der LLC-Resonanzwandler direkt an die gleichgerichtete Netzspannung angeschlossen wird.Zum Einsatz des LLC-Resonanzwandlers als einstufiger Ladewandler ist die Schaltung für einen großen Strom- und Spannungsbereich auszulegen. Hierfür wird in der vorliegenden Arbeit eine erweiterte Zeitbereichsanalyse erarbeitet, deren hohe Modellierungsgenauigkeit im Anschluss experimentell nachgewiesen wird. Mit Hilfe dieser Zeitbereichsanalyse werden die Belastungsgrößen des Resonanzwandlers berechnet, um hiermit eine Vorauswahl der Schaltungsparameter treffen zu können. Darauf aufbauend erfolgt die Optimierung des integrierten Transformators als Schlüsselkomponente des Ladewandlers sowie dessen prototypische Realisierung. Abschließend wird mittels Prototypen die erzielbare Leistungsdichte ermittelt. Ergebnis: Verglichen mit etablierten Ladewandlern der heutigen Elektrofahrzeuge konnte durch den einstufigen Ansatz die Leistungsdichte um ca. 53% gesteigert werden.}}, author = {{Keuck, Lukas}}, publisher = {{LibreCat University}}, title = {{{Entwurf eines einstufigen Ladewandlers auf Basis eines LLC-Resonanzwandlers}}}, doi = {{10.17619/UNIPB/1-1727}}, year = {{2023}}, } @article{58699, abstract = {{ Context Evidence is emerging that core neurocognitive functions such as working memory and inhibitory control (ie, motor-response and attentional inhibition) are linked to the anterior cruciate ligament (ACL) injury risk. Research has been conducted in laboratory settings, but the contribution of neurocognition to actual ACL injuries under real-world conditions is unknown. Objective To describe the possible neurocognitive errors involved in noncontact ACL injury mechanisms. Design Case series. Setting Soccer matches. Patients or Other Participants A total of 47 professional male soccer players. Main Outcome Measure(s) Three independent reviewers evaluated 47 videos of players sustaining noncontact ACL injuries. Neurocognitive errors in inhibitory control were operationalized as follows: (1) motor-response inhibition was scored when a player demonstrated poor decision-making and approached the opponent with high speed that reduced the ability to stop or change the intended action and (2) an attentional error was scored when a player shifted his selective attention away from the relevant task to irrelevant stimuli. Results Of 47 noncontact ACL injuries, 26 (55%) were related to a pressing-type injury, 19 (73%) of which involved a deceiving action made by the opponent, suggesting poor inhibitory control of the defender. Of the remaining 21 noncontact ACL injuries (45%), 16 (76%) could be attributed to attentional errors. Agreement among the 3 raters was very good for all items except poor decision-making, which showed fair to good agreement (Fleiss κ = 0.71). Interrater reliability was excellent (intraclass correlation coefficient = 0.99–1.00). Conclusions Errors in motor-response inhibitory control and attentional inhibition were common during noncontact ACL injury events in professional male soccer players. The interrater agreement in detecting neurocognitive errors in general was very good. }}, author = {{Gokeler, Alli and Tosarelli, Filippo and Buckthorpe, Matthew and Della Villa, Francesco}}, issn = {{1938-162X}}, journal = {{Journal of Athletic Training}}, number = {{3}}, pages = {{262--269}}, publisher = {{Journal of Athletic Training/NATA}}, title = {{{Neurocognitive Errors and Noncontact Anterior Cruciate Ligament Injuries in Professional Male Soccer Players}}}, doi = {{10.4085/1062-6050-0209.22}}, volume = {{59}}, year = {{2023}}, }