@inproceedings{25524, author = {{Höper, Lukas and Schulte, Carsten}}, booktitle = {{19. GI-Fachtagung Informatik und Schule, INFOS 2021, Wuppertal, Germany, September 8-10, 2021}}, editor = {{Humbert, Ludger}}, pages = {{73--82}}, publisher = {{Gesellschaft für Informatik, Bonn}}, title = {{{Datenbewusstsein: Aufmerksamkeit für die eigenen Daten}}}, doi = {{10.18420/infos2021\_f235}}, volume = {{P-313}}, year = {{2021}}, } @inbook{56204, author = {{Frischemeier, Daniel and Podworny, Susanne and Biehler, Rolf}}, booktitle = {{Konzepte und Studien zur Hochschuldidaktik und Lehrerbildung Mathematik}}, isbn = {{9783662628539}}, issn = {{2197-8751}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Integration fachwissenschaftlicher und fachdidaktischer Komponenten in der Lehramtsausbildung Mathematik Grundschule am Beispiel einer Veranstaltung zur Leitidee „Daten, Häufigkeit und Wahrscheinlichkeit“}}}, doi = {{10.1007/978-3-662-62854-6_11}}, year = {{2021}}, } @inproceedings{52928, author = {{Alrabbaa, Christian and Hieke, Willi and Turhan, Anni-Yasmin}}, booktitle = {{Proceedings of the 7th Workshop on Formal and Cognitive Reasoning co-located with the 44th German Conference on Artificial Intelligence (KI 2021), September 28, 2021}}, editor = {{Beierle, Christoph and Ragni, Marco and Stolzenburg, Frieder and Thimm, Matthias}}, pages = {{9–22}}, publisher = {{CEUR-WS.org}}, title = {{{Counter Model Transformation for Explaining Non-Subsumption in EL}}}, volume = {{2961}}, year = {{2021}}, } @inproceedings{24540, abstract = {{With its growing population and industrialization, DREs, and solar technologies in particular, provide a sustainable means of bridging the current energy deficit in Africa, increasing supply reliability and meeting future demand. Data acquisition and data management systems allow real time monitoring and control of energy systems as well as performance analysis. However commercial data acquisition systems often have cost implications that are prohibitive for small PV systems and installations in developing countries. In this paper, a multi-user, multi-purpose microgrid database system is designed and implemented. MAVOWATT 270 power quality analyzers by GOSSEN METRAWATT, raspberry pi modules and sensors are used for measuring, recording and storing electrical and meteorological data in East Africa. Socio-economic data is also stored in the database. The designed system employs open source software and hardware solutions which are best suited to developing regions like East Africa due to the lower cost implications. The expected results promise a comprehensive database covering different electro-technical and socio-economic parameters useful for optimal design of microgrid systems.}}, author = {{Kakande, Josephine Nakato and Philipo, Godiana Hagile and Krauter, Stefan}}, booktitle = {{Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)}}, isbn = {{3-936338-78-7}}, keywords = {{Art-D, Afrika, Demand side management, MySQL, Raspberry pi, Data acquisition}}, pages = {{1505--1510}}, title = {{{Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures}}}, doi = {{10.4229/EUPVSEC20212021-6BV.5.38}}, year = {{2021}}, } @inproceedings{22462, author = {{Shivarpatna Venkatesh, Ashwin Prasad and Bodden, Eric}}, booktitle = {{International Workshop on AI and Software Testing/Analysis (AISTA)}}, title = {{{Automated Cell Header Generator for Jupyter Notebooks}}}, doi = {{10.1145/3464968.3468410}}, year = {{2021}}, } @book{64262, author = {{Kusay-Merkle, Ursula}}, isbn = {{9783662628096}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Agiles Projektmanagement im Berufsalltag}}}, doi = {{10.1007/978-3-662-62810-2}}, year = {{2021}}, } @inproceedings{21178, abstract = {{When engaging in argumentative discourse, skilled human debaters tailor claims to the beliefs of the audience, to construct effective arguments. Recently, the field of computational argumentation witnessed extensive effort to address the automatic generation of arguments. However, existing approaches do not perform any audience-specific adaptation. In this work, we aim to bridge this gap by studying the task of belief-based claim generation: Given a controversial topic and a set of beliefs, generate an argumentative claim tailored to the beliefs. To tackle this task, we model the people's prior beliefs through their stances on controversial topics and extend state-of-the-art text generation models to generate claims conditioned on the beliefs. Our automatic evaluation confirms the ability of our approach to adapt claims to a set of given beliefs. In a manual study, we additionally evaluate the generated claims in terms of informativeness and their likelihood to be uttered by someone with a respective belief. Our results reveal the limitations of modeling users' beliefs based on their stances, but demonstrate the potential of encoding beliefs into argumentative texts, laying the ground for future exploration of audience reach.}}, author = {{Alshomary, Milad and Chen, Wei-Fan and Gurcke, Timon and Wachsmuth, Henning}}, booktitle = {{Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume}}, location = {{Online}}, pages = {{224--233}}, publisher = {{Association for Computational Linguistics}}, title = {{{Belief-based Generation of Argumentative Claims}}}, doi = {{10.18653/v1/2021.eacl-main.17}}, year = {{2021}}, } @inproceedings{59780, author = {{Petrov, Dmitry and Taron, Kim-Florian and Hilleringmann, Ulrich and Joubert, Trudi-Heleen}}, booktitle = {{2021 Smart Systems Integration (SSI)}}, publisher = {{IEEE}}, title = {{{Low-cost Sensor System for on-the-field Water Quality Analysis}}}, doi = {{10.1109/ssi52265.2021.9466956}}, year = {{2021}}, } @inproceedings{59777, author = {{Hilleringmann, Ulrich and Petrov, Dmitry and Mwammenywa, Ibrahim and Kagarura, Geoffrey Mark}}, booktitle = {{2021 IEEE AFRICON}}, publisher = {{IEEE}}, title = {{{Local Power Control using Wireless Sensor System for Microgrids in Africa}}}, doi = {{10.1109/africon51333.2021.9570970}}, year = {{2021}}, } @inproceedings{39397, author = {{Petrov, Dmitry and Kroschewski, Konstantin and Hilleringmann, Ulrich}}, booktitle = {{2021 Smart Systems Integration (SSI)}}, publisher = {{IEEE}}, title = {{{Microcontroller Firmware Design for Industrial Wireless Sensors}}}, doi = {{10.1109/ssi52265.2021.9467010}}, year = {{2021}}, } @article{59779, author = {{Petrov, Dmitry and Hilleringmann, Ulrich}}, issn = {{2415-6698}}, journal = {{Advances in Science, Technology and Engineering Systems Journal}}, number = {{5}}, pages = {{267--272}}, publisher = {{ASTES Journal}}, title = {{{Low-Power Primary Cell with Water-Based Electrolyte for Powering of Wireless Sensors}}}, doi = {{10.25046/aj060529}}, volume = {{6}}, year = {{2021}}, } @inproceedings{59774, author = {{Petrov, Dmitry and Kroschewski, Konstantin and Mwammenywa, Ibrahim and Kagarura, Geoffrey Mark and Hilleringmann, Ulrich}}, booktitle = {{2021 IEEE Sensors}}, publisher = {{IEEE}}, title = {{{Low-Cost NB-IoT Microgrid Power Quality Monitoring System}}}, doi = {{10.1109/sensors47087.2021.9639641}}, year = {{2021}}, } @phdthesis{64765, author = {{Nikitin, Natalie}}, title = {{{Regularity properties of infinite-dimensional Lie groups and exponential laws}}}, year = {{2021}}, } @article{34790, author = {{Glöckner, Helge and Willis, George A.}}, issn = {{0075-4102}}, journal = {{Journal für die reine und angewandte Mathematik}}, keywords = {{22D05, 22A05, 20E18}}, pages = {{85–103}}, title = {{{Locally pro-p contraction groups are nilpotent}}}, doi = {{10.1515/crelle-2021-0050}}, volume = {{781}}, year = {{2021}}, } @inbook{54587, abstract = {{With significant growth in RDF datasets, application developers demand online availability of these datasets to meet the end users’ expectations. Various interfaces are available for querying RDF data using SPARQL query language. Studies show that SPARQL end-points may provide high query runtime performance at the cost of low availability. For example, it has been observed that only 32.2% of public endpoints have a monthly uptime of 99–100%. One possible reason for this low availability is the high workload experienced by these SPARQL endpoints. As complete query execution is performed at server side (i.e., SPARQL endpoint), this high query processing workload may result in performance degradation or even a service shutdown. We performed extensive experiments to show the query processing capabilities of well-known triple stores by using their SPARQL endpoints. In particular, we stressed these triple stores with multiple parallel requests from different querying agents. Our experiments revealed the maximum query processing capabilities of these triple stores after which point they lead to service shutdowns. We hope this analysis will help triple store developers to design workload-aware RDF engines to improve the availability of their public endpoints with high throughput.}}, author = {{Khan, Hashim and Manzoor, Ali and Ngonga Ngomo, Axel-Cyrille and Saleem, Muhammad}}, booktitle = {{Studies on the Semantic Web}}, issn = {{1868-1158}}, publisher = {{IOS Press}}, title = {{{When is the Peak Performance Reached? An Analysis of RDF Triple Stores}}}, doi = {{10.3233/ssw210042}}, year = {{2021}}, } @article{29209, abstract = {{We demonstrate an optical arbitrary waveform measurement (OAWM) system that exploits a bank of silicon photonic (SiP) frequency-tunable coupled-resonator optical waveguide (CROW) filters for gapless spectral slicing of broadband optical signals. The spectral slices are coherently detected using a frequency comb as a multi-wavelength local oscillator (LO) and stitched together by digital signal processing (DSP). For high-quality signal reconstruction, we have implemented a maximum-ratio combining (MRC) technique based on precise calibration of the complex-valued opto-electronic transfer functions of all detection paths. In a proof-of-concept experiment, we demonstrate the viability of the scheme by implementing a four-channel system that offers an overall detection bandwidth of 140 GHz. Exploiting a femtosecond laser with precisely known pulse shape for calibration along with dynamic amplitude and phase estimation, we reconstruct 100 GBd QPSK, 16QAM and 64QAM optical data signals. The reconstructed signals show improved quality compared to that obtained with a single high-speed intradyne receiver, while the electronic bandwidth requirements of the individual coherent receivers are greatly reduced.}}, author = {{Fang, Dengyang and Zazzi, Andrea and Müller, Juliana and Dray, Daniel and Fullner, Christoph and Marin-Palomo, Pablo and Tabatabaei Mashayekh, Alireza and Dipta Das, Arka and Weizel, Maxim and Gudyriev, Sergiy and Freude, Wolfgang and Randel, Sebastian and Scheytt, J. Christoph and Witzens, Jeremy and Koos, Christian}}, issn = {{0733-8724}}, journal = {{Journal of Lightwave Technology}}, keywords = {{Atomic and Molecular Physics, and Optics}}, pages = {{1--1}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Optical Arbitrary Waveform Measurement Using Silicon Photonic Slicing Filters}}}, doi = {{10.1109/jlt.2021.3130764}}, year = {{2021}}, } @article{29211, abstract = {{Electrical-optical signal processing has been shown to be a promising path to overcome the limitations of state-of-the-art all-electrical data converters. In addition to ultra-broadband signal processing, it allows leveraging ultra-low jitter mode-locked lasers and thus increasing the aperture jitter limited effective number of bits at high analog signal frequencies. In this paper, we review our recent progress towards optically enabled time- and frequency-interleaved analog-to-digital converters, as well as their monolithic integration in electronic-photonic integrated circuits. For signal frequencies up to 65 GHz, an optoelectronic track-and-hold amplifier based on the source-emitter-follower architecture is shown as a power efficient approach in optically enabled BiCMOS technology. At higher signal frequencies, integrated photonic filters enable signal slicing in the frequency domain and further scaling of the conversion bandwidth, with the reconstruction of a 140 GHz optical signal being shown. We further show how such optically enabled data converter architectures can be applied to a nonlinear Fourier transform based integrated transceiver in particular and discuss their applicability to broadband optical links in general.}}, author = {{Zazzi, Andrea and Müller, Juliana and Weizel, Maxim and Koch, Jonas and Fang, Dengyang and Moscoso-Martir, Alvaro and Tabatabaei Mashayekh, Ali and Das, Arka D. and Drays, Daniel and Merget, Florian and Kartner, Franz X. and Pachnicke, Stephan and Koos, Christian and Scheytt, J. Christoph and Witzens, Jeremy}}, issn = {{2644-1349}}, journal = {{IEEE Open Journal of the Solid-State Circuits Society}}, pages = {{209--221}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Optically Enabled ADCs and Application to Optical Communications}}}, doi = {{10.1109/ojsscs.2021.3110943}}, volume = {{1}}, year = {{2021}}, } @article{29212, author = {{Fang, Dengyang and Zazzi, Andrea and Müller, Juliana and Daniel, Drayß and Füllner, Christoph and Marin-Palomo, Pablo and Mashayekh, Ali Tabatabaei and Das, Arka Dipta and Weizel, Maxim and Gudyriev, Sergiy and Freude, Wolfgang and Randel, Sebastian and Scheytt, J. Christoph and Witzens, Jeremy and Koos, Christian}}, isbn = {{978-1-943580-86-6}}, journal = {{OSA Technical Digest}}, title = {{{Optical Arbitrary Waveform Measurement (OAWM) on the Silicon Photonic Platform}}}, doi = {{10.1109/JLT.2021.3130764}}, year = {{2021}}, } @article{23476, author = {{Weizel, Maxim and Scheytt, J. Christoph and Kärtner, Franz X. and Witzens, Jeremy}}, issn = {{1094-4087}}, journal = {{Optics Express}}, title = {{{Optically clocked switched-emitter-follower THA in a photonic SiGe BiCMOS technology}}}, doi = {{10.1364/oe.425710}}, year = {{2021}}, } @article{31132, author = {{Dann, Andreas Peter and Plate, Henrik and Hermann, Ben and Ponta, Serena Elisa and Bodden, Eric}}, issn = {{0098-5589}}, journal = {{IEEE Transactions on Software Engineering}}, keywords = {{Software}}, pages = {{1--1}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Identifying Challenges for OSS Vulnerability Scanners - A Study & Test Suite}}}, doi = {{10.1109/tse.2021.3101739}}, year = {{2021}}, }