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Christoph Scheytt. “Reference-Less Bang-Bang CDR with Enhanced Frequency Acquisition Range Using Static and Modulated Integral Branch Offset Currents.” In <i>The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium</i>, 2021. <a href=\"https://doi.org/10.1109/BCICTS50416.2021.9682207\">https://doi.org/10.1109/BCICTS50416.2021.9682207</a>.","mla":"Iftekhar, Mohammed, et al. “Reference-Less Bang-Bang CDR with Enhanced Frequency Acquisition Range Using Static and Modulated Integral Branch Offset Currents.” <i>The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium</i>, 2021, doi:<a href=\"https://doi.org/10.1109/BCICTS50416.2021.9682207\">10.1109/BCICTS50416.2021.9682207</a>.","ama":"Iftekhar M, Gudyriev S, Scheytt JC. Reference-less Bang-bang CDR with Enhanced Frequency Acquisition Range Using Static and Modulated Integral Branch Offset Currents. In: <i>The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium</i>. ; 2021. doi:<a href=\"https://doi.org/10.1109/BCICTS50416.2021.9682207\">10.1109/BCICTS50416.2021.9682207</a>","bibtex":"@inproceedings{Iftekhar_Gudyriev_Scheytt_2021, title={Reference-less Bang-bang CDR with Enhanced Frequency Acquisition Range Using Static and Modulated Integral Branch Offset Currents}, DOI={<a href=\"https://doi.org/10.1109/BCICTS50416.2021.9682207\">10.1109/BCICTS50416.2021.9682207</a>}, booktitle={The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium}, author={Iftekhar, Mohammed and Gudyriev, Sergiy and Scheytt, J. Christoph}, year={2021} }"},"publication":"The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium","related_material":{"link":[{"relation":"confirmation","url":"https://ieeexplore.ieee.org/abstract/document/9682207"}]},"abstract":[{"lang":"eng","text":"This paper presents a technique to extend the frequency acquisition range for bang-bang phase-detector-based clock and data recovery (CDR) circuits without an additional frequency acquisition loop or lock detection circuit. The per-manent modulation of the offset current in the CDR's integral branch enhances the acquisition range by nearly 4 times, covering the entire tuning range of the voltage controlled oscillator. The increase in power dissipation and the chip area are negligible. This technique was implemented and measured in a 28 Gbps NRZ bang-bang CDR chip to confirm the working principle. In addition to the increased acquisition range, the CDR also surpasses jitter related specifications from the OIF CEI-28G-VSR standard."}],"date_created":"2022-01-11T07:23:37Z","department":[{"_id":"58"}],"type":"conference","author":[{"id":"47944","first_name":"Mohammed","last_name":"Iftekhar","full_name":"Iftekhar, Mohammed"},{"full_name":"Gudyriev, Sergiy","last_name":"Gudyriev","first_name":"Sergiy"},{"id":"37144","last_name":"Scheytt","first_name":"J. Christoph","full_name":"Scheytt, J. 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Wachsmuth, in: Proceedings of the 8th Workshop on Argument Mining, 2021, pp. 67–77.","chicago":"Gurcke, Timon, Milad Alshomary, and Henning Wachsmuth. “Assessing the Sufficiency of Arguments through Conclusion Generation.” In <i>Proceedings of the 8th Workshop on Argument Mining</i>, 67–77, 2021.","mla":"Gurcke, Timon, et al. “Assessing the Sufficiency of Arguments through Conclusion Generation.” <i>Proceedings of the 8th Workshop on Argument Mining</i>, 2021, pp. 67–77.","bibtex":"@inproceedings{Gurcke_Alshomary_Wachsmuth_2021, title={Assessing the Sufficiency of Arguments through Conclusion Generation}, booktitle={Proceedings of the 8th Workshop on Argument Mining}, author={Gurcke, Timon and Alshomary, Milad and Wachsmuth, Henning}, year={2021}, pages={67–77} }","ama":"Gurcke T, Alshomary M, Wachsmuth H. Assessing the Sufficiency of Arguments through Conclusion Generation. 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Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik. In: <i>Fortschritte der Akustik - DAGA 2021</i>. ; 2021.","bibtex":"@inproceedings{Hetkämper_Dreiling_Claes_Henning_2021, title={Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik}, booktitle={Fortschritte der Akustik - DAGA 2021}, author={Hetkämper, Tim and Dreiling, Dmitrij and Claes, Leander and Henning, Bernd}, year={2021} }","apa":"Hetkämper, T., Dreiling, D., Claes, L., &#38; Henning, B. (2021). Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik. <i>Fortschritte der Akustik - DAGA 2021</i>. DAGA 2021 - 47. Jahrestagung für Akustik.","ieee":"T. Hetkämper, D. Dreiling, L. Claes, and B. Henning, “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik,” presented at the DAGA 2021 - 47. Jahrestagung für Akustik, 2021.","short":"T. Hetkämper, D. Dreiling, L. Claes, B. Henning, in: Fortschritte der Akustik - DAGA 2021, 2021.","chicago":"Hetkämper, Tim, Dmitrij Dreiling, Leander Claes, and Bernd Henning. “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.” In <i>Fortschritte der Akustik - DAGA 2021</i>, 2021."},"user_id":"38123","ddc":["620"],"language":[{"iso":"ger"}],"_id":"25880","publication_status":"published","date_updated":"2022-05-12T15:29:26Z","has_accepted_license":"1","title":"Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik","year":"2021","status":"public","author":[{"id":"38123","full_name":"Hetkämper, Tim","first_name":"Tim","last_name":"Hetkämper"},{"full_name":"Dreiling, Dmitrij","last_name":"Dreiling","first_name":"Dmitrij","id":"32616"},{"id":"11829","orcid":"0000-0002-4393-268X","first_name":"Leander","last_name":"Claes","full_name":"Claes, Leander"},{"id":"213","last_name":"Henning","first_name":"Bernd","full_name":"Henning, Bernd"}],"conference":{"name":"DAGA 2021 - 47. Jahrestagung für Akustik"}},{"year":"2021","title":"Resonances and weighted zeta functions for obstacle scattering via smooth models","status":"public","author":[{"full_name":"Schütte, Philipp","first_name":"Philipp","last_name":"Schütte","id":"50168"},{"id":"49178","full_name":"Weich, Tobias","orcid":"0000-0002-9648-6919","last_name":"Weich","first_name":"Tobias"},{"full_name":"Delarue, Benjamin","first_name":"Benjamin","last_name":"Delarue"}],"date_updated":"2022-05-17T12:05:52Z","language":[{"iso":"eng"}],"_id":"31058","user_id":"50168","citation":{"ama":"Schütte P, Weich T, Delarue B. Resonances and weighted zeta functions for obstacle scattering via smooth models. Published online 2021.","bibtex":"@article{Schütte_Weich_Delarue_2021, title={Resonances and weighted zeta functions for obstacle scattering via smooth models}, author={Schütte, Philipp and Weich, Tobias and Delarue, Benjamin}, year={2021} }","mla":"Schütte, Philipp, et al. <i>Resonances and Weighted Zeta Functions for Obstacle Scattering via Smooth Models</i>. 2021.","chicago":"Schütte, Philipp, Tobias Weich, and Benjamin Delarue. “Resonances and Weighted Zeta Functions for Obstacle Scattering via Smooth Models,” 2021.","short":"P. Schütte, T. Weich, B. Delarue, (2021).","apa":"Schütte, P., Weich, T., &#38; Delarue, B. (2021). <i>Resonances and weighted zeta functions for obstacle scattering via smooth models</i>.","ieee":"P. Schütte, T. Weich, and B. Delarue, “Resonances and weighted zeta functions for obstacle scattering via smooth models.” 2021."},"abstract":[{"text":"We consider a geodesic billiard system consisting of a complete Riemannian manifold and an obstacle submanifold with boundary at which the trajectories of the geodesic flow experience specular reflections. We show that if the geodesic billiard system is hyperbolic on its trapped set and the latter is compact and non-grazing the techniques for open hyperbolic systems developed by Dyatlov and Guillarmou can be applied to a smooth model for the discontinuous flow defined by the non-grazing billiard trajectories. This allows us to obtain a meromorphic resolvent for the generator of the billiard flow. As an application we prove a meromorphic continuation of weighted zeta functions together with explicit residue formulae. In particular, our results apply to scattering by convex obstacles in the Euclidean plane.","lang":"eng"}],"external_id":{"arxiv":["2109.05907"]},"date_created":"2022-05-04T12:25:58Z","type":"preprint","department":[{"_id":"10"},{"_id":"548"}]},{"type":"review","department":[{"_id":"97"}],"oa":"1","date_created":"2022-05-22T15:20:46Z","publication":"Mathematische Semesterberichte","citation":{"short":"M. Hoffmann, Mathematische Semesterberichte 68 (2021) 295–297.","chicago":"Hoffmann, Max. “Rezension: Hendrik Kasten und Denis Vogel: Grundlagen der ebenen Geometrie – Eine zugängliche aber exakte Einführung in die ebene Geometrie.” <i>Mathematische Semesterberichte</i>, 2021. <a href=\"https://doi.org/10.1007/s00591-021-00299-3\">https://doi.org/10.1007/s00591-021-00299-3</a>.","apa":"Hoffmann, M. (2021). Rezension: Hendrik Kasten und Denis Vogel: Grundlagen der ebenen Geometrie – Eine zugängliche aber exakte Einführung in die ebene Geometrie. In <i>Mathematische Semesterberichte</i> (Vol. 68, pp. 295–297). <a href=\"https://doi.org/10.1007/s00591-021-00299-3\">https://doi.org/10.1007/s00591-021-00299-3</a>","ieee":"M. Hoffmann, “Rezension: Hendrik Kasten und Denis Vogel: Grundlagen der ebenen Geometrie – Eine zugängliche aber exakte Einführung in die ebene Geometrie,” <i>Mathematische Semesterberichte</i>, vol. 68. pp. 295–297, 2021, doi: <a href=\"https://doi.org/10.1007/s00591-021-00299-3\">10.1007/s00591-021-00299-3</a>.","ama":"Hoffmann M. 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Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. <a href=\"https://doi.org/10.1007/978-3-662-62854-6_9\">https://doi.org/10.1007/978-3-662-62854-6_9</a>.","short":"M. Hoffmann, in: R. Biehler, A. Eichler, R. Hochmuth, S. Rach, N. Schaper (Eds.),  Lehrinnovationen in der Hochschulmathematik.  praxisrelevant – didaktisch fundiert – forschungsbasiert, Springer Berlin Heidelberg, Berlin, Heidelberg, 2021, pp. 179–204.","apa":"Hoffmann, M. (2021). Einsatz von Schnittstellenaufgaben in Mathematikveranstaltungen – Praxisbeispiele aus der Universität Paderborn. In R. Biehler, A. Eichler, R. Hochmuth, S. Rach, &#38; N. Schaper (Eds.), <i> Lehrinnovationen in der Hochschulmathematik.  praxisrelevant – didaktisch fundiert – forschungsbasiert</i> (pp. 179–204). Springer Berlin Heidelberg. <a href=\"https://doi.org/10.1007/978-3-662-62854-6_9\">https://doi.org/10.1007/978-3-662-62854-6_9</a>","ieee":"M. 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Berlin, Heidelberg: Springer Berlin Heidelberg, 2021, pp. 179–204."},"place":"Berlin, Heidelberg","status":"public","user_id":"32202","editor":[{"first_name":"Rolf","last_name":"Biehler","full_name":"Biehler, Rolf"},{"last_name":"Eichler","first_name":"Andreas","full_name":"Eichler, Andreas"},{"full_name":"Hochmuth, Reinhard","first_name":"Reinhard","last_name":"Hochmuth"},{"last_name":"Rach","first_name":"Stefanie","full_name":"Rach, Stefanie"},{"last_name":"Schaper","first_name":"Niclas","full_name":"Schaper, Niclas"}],"page":"179–204","_id":"31364","publisher":"Springer Berlin Heidelberg"},{"page":"8225-8296","publisher":"Oxford University Press (OUP)","_id":"31261","user_id":"49178","volume":2021,"status":"public","external_id":{"arxiv":["1710.04625"]},"citation":{"bibtex":"@article{Küster_Weich_2021, title={Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces}, volume={2021}, DOI={<a href=\"https://doi.org/10.1093/imrn/rnz068\">10.1093/imrn/rnz068</a>}, number={11}, journal={International Mathematics Research Notices}, publisher={Oxford University Press (OUP)}, author={Küster, Benjamin and Weich, Tobias}, year={2021}, pages={8225–8296} }","chicago":"Küster, Benjamin, and Tobias Weich. “Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces.” <i>International Mathematics Research Notices</i> 2021, no. 11 (2021): 8225–96. <a href=\"https://doi.org/10.1093/imrn/rnz068\">https://doi.org/10.1093/imrn/rnz068</a>.","ama":"Küster B, Weich T. Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces. <i>International Mathematics Research Notices</i>. 2021;2021(11):8225-8296. doi:<a href=\"https://doi.org/10.1093/imrn/rnz068\">10.1093/imrn/rnz068</a>","short":"B. Küster, T. Weich, International Mathematics Research Notices 2021 (2021) 8225–8296.","ieee":"B. Küster and T. Weich, “Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces,” <i>International Mathematics Research Notices</i>, vol. 2021, no. 11, pp. 8225–8296, 2021, doi: <a href=\"https://doi.org/10.1093/imrn/rnz068\">10.1093/imrn/rnz068</a>.","apa":"Küster, B., &#38; Weich, T. (2021). Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces. <i>International Mathematics Research Notices</i>, <i>2021</i>(11), 8225–8296. <a href=\"https://doi.org/10.1093/imrn/rnz068\">https://doi.org/10.1093/imrn/rnz068</a>","mla":"Küster, Benjamin, and Tobias Weich. “Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces.” <i>International Mathematics Research Notices</i>, vol. 2021, no. 11, Oxford University Press (OUP), 2021, pp. 8225–96, doi:<a href=\"https://doi.org/10.1093/imrn/rnz068\">10.1093/imrn/rnz068</a>."},"language":[{"iso":"eng"}],"doi":"10.1093/imrn/rnz068","year":"2021","title":"Quantum-Classical Correspondence on Associated Vector Bundles Over Locally Symmetric Spaces","publication_identifier":{"issn":["1073-7928","1687-0247"]},"author":[{"full_name":"Küster, Benjamin","first_name":"Benjamin","last_name":"Küster"},{"last_name":"Weich","first_name":"Tobias","full_name":"Weich, Tobias"}],"date_updated":"2022-05-25T06:42:01Z","publication_status":"published","intvolume":"      2021","date_created":"2022-05-17T12:00:36Z","type":"journal_article","keyword":["General Mathematics"],"department":[{"_id":"10"},{"_id":"623"},{"_id":"548"}],"issue":"11","publication":"International Mathematics Research Notices","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>For a compact Riemannian locally symmetric space $\\mathcal M$ of rank 1 and an associated vector bundle $\\mathbf V_{\\tau }$ over the unit cosphere bundle $S^{\\ast }\\mathcal M$, we give a precise description of those classical (Pollicott–Ruelle) resonant states on $\\mathbf V_{\\tau }$ that vanish under covariant derivatives in the Anosov-unstable directions of the chaotic geodesic flow on $S^{\\ast }\\mathcal M$. In particular, we show that they are isomorphically mapped by natural pushforwards into generalized common eigenspaces of the algebra of invariant differential operators $D(G,\\sigma )$ on compatible associated vector bundles $\\mathbf W_{\\sigma }$ over $\\mathcal M$. As a consequence of this description, we obtain an exact band structure of the Pollicott–Ruelle spectrum. Further, under some mild assumptions on the representations $\\tau$ and $\\sigma$ defining the bundles $\\mathbf V_{\\tau }$ and $\\mathbf W_{\\sigma }$, we obtain a very explicit description of the generalized common eigenspaces. This allows us to relate classical Pollicott–Ruelle resonances to quantum eigenvalues of a Laplacian in a suitable Hilbert space of sections of $\\mathbf W_{\\sigma }$. Our methods of proof are based on representation theory and Lie theory.</jats:p>"}]},{"department":[{"_id":"98"},{"_id":"543"}],"type":"journal_article","date_created":"2022-06-02T08:04:02Z","related_material":{"link":[{"url":"https://link.springer.com/content/pdf/10.1007/s42278-020-00097-1.pdf","relation":"contains"}]},"citation":{"chicago":"Häsel-Weide, Uta, and Marcus Nührenbürger. “Inklusive Praktiken im Mathematikunterricht. Empirische Analysen von Unterrichtsdiskursen in Einführungsphasen.” <i>Zeitschrift für Grundschulforschung (ZfG)</i>, no. 14 (2021): 49–65.","short":"U. Häsel-Weide, M. Nührenbürger, Zeitschrift für Grundschulforschung (ZfG) (2021) 49–65.","apa":"Häsel-Weide, U., &#38; Nührenbürger, M. (2021). Inklusive Praktiken im Mathematikunterricht. Empirische Analysen von Unterrichtsdiskursen in Einführungsphasen. <i>Zeitschrift für Grundschulforschung (ZfG)</i>, <i>14</i>, 49–65.","ieee":"U. Häsel-Weide and M. Nührenbürger, “Inklusive Praktiken im Mathematikunterricht. 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The 25th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD-2021), Delhi, India."},"user_id":"38209","_id":"21198","language":[{"iso":"eng"}],"series_title":"PAKDD","date_updated":"2022-08-24T12:49:06Z","author":[{"full_name":"Hanselle, Jonas Manuel","orcid":"0000-0002-1231-4985","first_name":"Jonas Manuel","last_name":"Hanselle","id":"43980"},{"full_name":"Tornede, Alexander","last_name":"Tornede","first_name":"Alexander","id":"38209"},{"full_name":"Wever, Marcel Dominik","orcid":" https://orcid.org/0000-0001-9782-6818","first_name":"Marcel Dominik","last_name":"Wever","id":"33176"},{"id":"48129","full_name":"Hüllermeier, Eyke","last_name":"Hüllermeier","first_name":"Eyke"}],"conference":{"end_date":"2021-05-14","location":"Delhi, India","start_date":"2021-05-11","name":"The 25th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD-2021)"},"year":"2021","title":"Algorithm Selection as Superset Learning: Constructing Algorithm Selectors from Imprecise Performance Data","status":"public"},{"place":"New York, NY, United States","citation":{"apa":"Hansmeier, T., &#38; Platzner, M. (2021). An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS. <i>GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion</i>, 1639–1647. <a href=\"https://doi.org/10.1145/3449726.3463159\">https://doi.org/10.1145/3449726.3463159</a>","ieee":"T. Hansmeier and M. Platzner, “An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS,” in <i>GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion</i>, Lille, France, 2021, pp. 1639–1647, doi: <a href=\"https://doi.org/10.1145/3449726.3463159\">10.1145/3449726.3463159</a>.","chicago":"Hansmeier, Tim, and Marco Platzner. “An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS.” In <i>GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion</i>, 1639–1647. New York, NY, United States: Association for Computing Machinery (ACM), 2021. <a href=\"https://doi.org/10.1145/3449726.3463159\">https://doi.org/10.1145/3449726.3463159</a>.","short":"T. Hansmeier, M. Platzner, in: GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion, Association for Computing Machinery (ACM), New York, NY, United States, 2021, pp. 1639–1647.","mla":"Hansmeier, Tim, and Marco Platzner. “An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS.” <i>GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion</i>, Association for Computing Machinery (ACM), 2021, pp. 1639–1647, doi:<a href=\"https://doi.org/10.1145/3449726.3463159\">10.1145/3449726.3463159</a>.","ama":"Hansmeier T, Platzner M. An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS. In: <i>GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion</i>. Association for Computing Machinery (ACM); 2021:1639–1647. doi:<a href=\"https://doi.org/10.1145/3449726.3463159\">10.1145/3449726.3463159</a>","bibtex":"@inproceedings{Hansmeier_Platzner_2021, place={New York, NY, United States}, title={An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS}, DOI={<a href=\"https://doi.org/10.1145/3449726.3463159\">10.1145/3449726.3463159</a>}, booktitle={GECCO ’21: Proceedings of the Genetic and Evolutionary Computation Conference Companion}, publisher={Association for Computing Machinery (ACM)}, author={Hansmeier, Tim and Platzner, Marco}, year={2021}, pages={1639–1647} }"},"project":[{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Subproject C2","_id":"14"}],"_id":"21813","publisher":"Association for Computing Machinery (ACM)","page":"1639–1647","user_id":"49992","conference":{"name":"International Workshop on Learning Classifier Systems (IWLCS 2021)","start_date":"2021-07-10","location":"Lille, France","end_date":"2021-07-14"},"status":"public","date_created":"2021-04-28T09:08:17Z","department":[{"_id":"78"}],"type":"conference","publication":"GECCO '21: Proceedings of the Genetic and Evolutionary Computation Conference Companion","language":[{"iso":"eng"}],"doi":"10.1145/3449726.3463159","author":[{"first_name":"Tim","last_name":"Hansmeier","orcid":"0000-0003-1377-3339","full_name":"Hansmeier, Tim","id":"49992"},{"id":"398","last_name":"Platzner","first_name":"Marco","full_name":"Platzner, Marco"}],"publication_identifier":{"isbn":["978-1-4503-8351-6"]},"year":"2021","title":"An Experimental Comparison of Explore/Exploit Strategies for the Learning Classifier System XCS","date_updated":"2022-09-02T09:42:38Z","publication_status":"published"},{"date_created":"2021-03-15T13:56:04Z","type":"dissertation","oa":"1","department":[{"_id":"49"}],"supervisor":[{"full_name":"Henning, Bernd","first_name":"Bernd","last_name":"Henning","id":"213"},{"first_name":"Jadran","last_name":"Vrabec","full_name":"Vrabec, Jadran"}],"citation":{"short":"L. Claes, Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität, Universiät Paderborn, 2021.","chicago":"Claes, Leander. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021. <a href=\"https://doi.org/10.17619/UNIPB/1-1104\">https://doi.org/10.17619/UNIPB/1-1104</a>.","apa":"Claes, L. (2021). <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-1104\">https://doi.org/10.17619/UNIPB/1-1104</a>","ieee":"L. Claes, <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021.","ama":"Claes L. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn; 2021. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>","bibtex":"@book{Claes_2021, title={Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>}, publisher={Universiät Paderborn}, author={Claes, Leander}, year={2021} }","mla":"Claes, Leander. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>."},"abstract":[{"text":"Die vollständige Beschreibung fluiddynamischer und akustischer Vorgänge setzt voraus, dass die Eigenschaften des Fluids hinlänglich bekannt sind.Während Fluidkenngrößen, wie etwa die Schallgeschwindigkeit oder die Scherviskosität, für viele Flüssigkeiten über weite Bereiche des thermodynamischen Zustandsraums bekannt sind, existieren für die Volumenviskosität nur eine geringe Anzahl Messdaten.In dieser Arbeit wird daher ein Messverfahren zur selektiven Bestimmung der Volumenviskosität von Flüssigkeiten, basierend auf der Absorption von Ultraschallwellen, entwickelt und realisiert.Schwerpunkte bilden dabei der simulationsgestützte Entwurf von Algorithmen zur Auswertung der Messsignale sowie die Analyse und Weiterentwicklung einer Messanordnung, basierend auf dem Puls-Echo-Verfahren. Neben der Absorption im Fluid treten dabei weitere Effekte (zum Beispiel Beugung oder unvollständige Reflexion) auf, die das akustische Signal schwächen oder anderweitig beeinflussen. Die Entwicklung von Verfahren zur Trennung dieser Effekte von der akustischen Absorption bildet daher einen weiteren Schwerpunkt dieser Arbeit.Abschließend wird die Volumenviskosität aus der gemessenen akustischen Absorption für unterschiedliche Fluide in verschiedenen thermodynamischen Zuständen unter Zuhilfenahme anderer bekannter Fluidkenngrößen bestimmt sowie eine Unsicherheitsbetrachtung durchgeführt.","lang":"ger"},{"text":"The prerequisite for a complete description of fluid dynamic and acoustic processes is that all properties of the fluid are known.While fluid parameters such as the speed of sound or the shear viscosity are known for many liquids over a wide range of thermodynamic states, only limited measurement data exist for the bulk viscosity.In this thesis, a measurement method for the selective determination of the bulk viscosity of liquids, based on the absorption of ultrasonic waves, is developed and implemented.The focus is on the simulation-driven design of algorithms for processing the measurement signals as well as the analysis and further development of a measurement set-up based on the pulse-echo method.In addition to absorption in the fluid, there are other effects (for example diffraction or incomplete reflection) that weaken or otherwise influence the acoustic signal.Therefore, the development of procedures to separate these effects from acoustic absorption is another focus of this work.The bulk viscosity is determined from the measured acoustic absorption for different fluids in different thermodynamic states. An uncertainty analysis of the measured quantities concludes this thesis.","lang":"eng"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"main_file_link":[{"url":"https://digital.ub.uni-paderborn.de/doi/10.17619/UNIPB/1-1104","open_access":"1"}],"page":"223","_id":"21502","publisher":"Universiät Paderborn","language":[{"iso":"ger"}],"doi":"10.17619/UNIPB/1-1104","user_id":"11829","status":"public","year":"2021","title":"Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität","author":[{"id":"11829","full_name":"Claes, Leander","first_name":"Leander","orcid":"0000-0002-4393-268X","last_name":"Claes"}],"date_updated":"2022-09-06T07:08:31Z"},{"citation":{"mla":"Kolb, Martin, et al. “Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature.” <i>Annales Henri Poincaré </i>, vol. 23, no. 4, Springer Science + Business Media, 2021, pp. 1283–96.","bibtex":"@article{Kolb_Weich_Wolf_2021, title={Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature}, volume={23}, number={4}, journal={Annales Henri Poincaré }, publisher={Springer Science + Business Media}, author={Kolb, Martin and Weich, Tobias and Wolf, Lasse}, year={2021}, pages={1283–1296} }","ama":"Kolb M, Weich T, Wolf L. Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature. <i>Annales Henri Poincaré </i>. 2021;23(4):1283-1296.","ieee":"M. Kolb, T. Weich, and L. Wolf, “Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature,” <i>Annales Henri Poincaré </i>, vol. 23, no. 4, pp. 1283–1296, 2021.","apa":"Kolb, M., Weich, T., &#38; Wolf, L. (2021). Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature. <i>Annales Henri Poincaré </i>, <i>23</i>(4), 1283–1296.","chicago":"Kolb, Martin, Tobias Weich, and Lasse Wolf. “Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature.” <i>Annales Henri Poincaré </i> 23, no. 4 (2021): 1283–96.","short":"M. Kolb, T. Weich, L. Wolf, Annales Henri Poincaré  23 (2021) 1283–1296."},"oa":"1","status":"public","volume":23,"user_id":"85821","_id":"33278","publisher":"Springer Science + Business Media","page":"1283-1296","abstract":[{"text":"The kinetic Brownian motion on the sphere bundle of a Riemannian manifold M is a stochastic process that models a random perturbation of the geodesic flow. If M is an orientable compact constantly curved surface, we show that in the limit of infinitely large perturbation the L2-spectrum of the infinitesimal generator of a time-rescaled version of the process converges to the Laplace spectrum of the base manifold.","lang":"eng"}],"related_material":{"link":[{"url":"https://link.springer.com/article/10.1007/s00023-021-01121-5","relation":"contains"}]},"publication":"Annales Henri Poincaré ","issue":"4","department":[{"_id":"96"}],"type":"journal_article","date_created":"2022-09-07T07:05:33Z","intvolume":"        23","publication_status":"published","date_updated":"2022-09-08T06:06:13Z","author":[{"id":"48880","first_name":"Martin","last_name":"Kolb","full_name":"Kolb, Martin"},{"full_name":"Weich, Tobias","last_name":"Weich","first_name":"Tobias"},{"last_name":"Wolf","first_name":"Lasse","full_name":"Wolf, Lasse"}],"title":"Spectral Asymptotics for Kinetic Brownian Motion on Surfaces of Constant Curvature","year":"2021","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://link.springer.com/article/10.1007/s00023-021-01121-5"}]},{"abstract":[{"text":"Modular solid-state transformers (SSTs) are a promising technology in converting power from a 10kV three-phase medium voltage to a lower DC-voltage in the range of 100…400V to provide pure DC power to applications such as electrolyzers for hydrogen generation, data centers with a DC power distribution and DC micro grids. Modular SSTs which can be interpreted as modular multilevel converters with an isolated DC-DC output stage per module, are designed with redundant modules to increase reliability. Usually, each of the three arms operates independently, and therefore, only a fixed number of faulty modules can be compensated in each arm, even if all modules are operational in the remaining two arms. With the proposed zero-sequence voltage injection, up to 100% more faulty modules can be compensated in an arm by employing the same hardware. In addition, module power imbalances are nearly eliminated by utilizing a fundamental frequency zero-sequence voltage. A dominant 3rd harmonic zero-sequence voltage injection in combination with the 5th, 7th and several higher order harmonics with adaptive (small) amplitudes minimize the required arm voltages at steady-state. For nominal operation or symmetrical faults, the proposed technique is equivalent to the well known Min-Max voltage injection, which already reduces the peak arm voltage by 13.4% compared to a constant star point potential. A statistical analysis proves, that the expected number of tolerable faulty modules of the 1MW SST increases by 12% without the need for additional hardware.","lang":"eng"}],"publication":"23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)","type":"conference","keyword":["Solid-State Transformer","Zero sequence voltage","Fault handling strategy","Power balance control technique","Three-phase system"],"department":[{"_id":"52"}],"date_created":"2022-02-21T16:31:34Z","date_updated":"2022-09-09T12:01:42Z","publication_status":"published","year":"2021","title":"Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions","author":[{"full_name":"Unruh, Roland","first_name":"Roland","last_name":"Unruh","id":"34289"},{"id":"78801","full_name":"Lange, Jarren","first_name":"Jarren","last_name":"Lange"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"},{"orcid":"0000-0002-8480-7295","first_name":"Joachim","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66"}],"publication_identifier":{"isbn":["978-9-0758-1537-5"]},"doi":"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542","main_file_link":[{"url":"https://ieeexplore.ieee.org/abstract/document/9570542"}],"language":[{"iso":"eng"}],"citation":{"apa":"Unruh, R., Lange, J., Schafmeister, F., &#38; Böcker, J. (2021). Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions. <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), Ghent, Belgium. <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>","ieee":"R. Unruh, J. Lange, F. Schafmeister, and J. Böcker, “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions,” presented at the 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), Ghent, Belgium, 2021, doi: <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>.","chicago":"Unruh, Roland, Jarren Lange, Frank Schafmeister, and Joachim Böcker. “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions.” In <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. IEEE, 2021. <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>.","short":"R. Unruh, J. Lange, F. Schafmeister, J. Böcker, in: 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), IEEE, 2021.","mla":"Unruh, Roland, et al. “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions.” <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>.","ama":"Unruh R, Lange J, Schafmeister F, Böcker J. Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions. In: <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>","bibtex":"@inproceedings{Unruh_Lange_Schafmeister_Böcker_2021, title={Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions}, DOI={<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542</a>}, booktitle={23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)}, publisher={IEEE}, author={Unruh, Roland and Lange, Jarren and Schafmeister, Frank and Böcker, Joachim}, year={2021} }"},"status":"public","conference":{"name":"23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)","start_date":"2021-09-06","location":"Ghent, Belgium","end_date":"2021-09-10"},"user_id":"34289","_id":"29938","publisher":"IEEE"},{"volume":132,"user_id":"85821","doi":"https://doi.org/10.1016/j.spa.2020.10.003","_id":"33481","language":[{"iso":"eng"}],"publisher":"Elsevier","page":"1-32","intvolume":"       132","publication_status":"published","date_updated":"2022-09-26T06:54:06Z","author":[{"full_name":"Richthammer, Thomas","last_name":"Richthammer","first_name":"Thomas","id":"62054"},{"full_name":"Fiedler, Michael","first_name":"Michael","last_name":"Fiedler"}],"status":"public","title":"A lower bound on the displacement of particles in 2D Gibbsian particle systems","year":"2021","department":[{"_id":"96"}],"type":"journal_article","date_created":"2022-09-26T06:53:59Z","abstract":[{"text":"While 2D Gibbsian particle systems might exhibit orientational order resulting in a lattice-like structure, these particle systems do not exhibit positional order if the interaction between particles satisfies some weak assumptions. Here we investigate to which extent particles within a box of size may fluctuate from their ideal lattice position. We show that particles near the center of the box typically show a displacement at least of order . Thus we extend recent results on the hard disk model to particle systems with fairly arbitrary particle spins and interaction. Our result applies to models such as rather general continuum Potts type models, e.g. with Widom–Rowlinson or Lenard-Jones-type interaction.","lang":"eng"}],"citation":{"bibtex":"@article{Richthammer_Fiedler_2021, title={A lower bound on the displacement of particles in 2D Gibbsian particle systems}, volume={132}, DOI={<a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>}, journal={Stochastic Processes and their Applications}, publisher={Elsevier}, author={Richthammer, Thomas and Fiedler, Michael}, year={2021}, pages={1–32} }","ama":"Richthammer T, Fiedler M. A lower bound on the displacement of particles in 2D Gibbsian particle systems. <i>Stochastic Processes and their Applications</i>. 2021;132:1-32. doi:<a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>","mla":"Richthammer, Thomas, and Michael Fiedler. “A Lower Bound on the Displacement of Particles in 2D Gibbsian Particle Systems.” <i>Stochastic Processes and Their Applications</i>, vol. 132, Elsevier, 2021, pp. 1–32, doi:<a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>.","chicago":"Richthammer, Thomas, and Michael Fiedler. “A Lower Bound on the Displacement of Particles in 2D Gibbsian Particle Systems.” <i>Stochastic Processes and Their Applications</i> 132 (2021): 1–32. <a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>.","short":"T. Richthammer, M. Fiedler, Stochastic Processes and Their Applications 132 (2021) 1–32.","ieee":"T. Richthammer and M. Fiedler, “A lower bound on the displacement of particles in 2D Gibbsian particle systems,” <i>Stochastic Processes and their Applications</i>, vol. 132, pp. 1–32, 2021, doi: <a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>.","apa":"Richthammer, T., &#38; Fiedler, M. (2021). A lower bound on the displacement of particles in 2D Gibbsian particle systems. <i>Stochastic Processes and Their Applications</i>, <i>132</i>, 1–32. <a href=\"https://doi.org/10.1016/j.spa.2020.10.003\">https://doi.org/10.1016/j.spa.2020.10.003</a>"},"publication":"Stochastic Processes and their Applications"},{"user_id":"44428","language":[{"iso":"eng"}],"_id":"27778","date_updated":"2022-09-27T15:03:19Z","year":"2021","title":"Full Version -- Server Cloud Scheduling","status":"public","author":[{"id":"88252","last_name":"Maack","first_name":"Marten","full_name":"Maack, Marten"},{"full_name":"Meyer auf der Heide, Friedhelm","first_name":"Friedhelm","last_name":"Meyer auf der Heide","id":"15523"},{"id":"44428","first_name":"Simon","last_name":"Pukrop","full_name":"Pukrop, Simon"}],"type":"preprint","department":[{"_id":"63"},{"_id":"26"}],"date_created":"2021-11-24T13:23:58Z","abstract":[{"lang":"eng","text":"Consider a set of jobs connected to a directed acyclic task graph with a\r\nfixed source and sink. The edges of this graph model precedence constraints and\r\nthe jobs have to be scheduled with respect to those. We introduce the Server\r\nCloud Scheduling problem, in which the jobs have to be processed either on a\r\nsingle local machine or on one of many cloud machines. Both the source and the\r\nsink have to be scheduled on the local machine. For each job, processing times\r\nboth on the server and in the cloud are given. Furthermore, for each edge in\r\nthe task graph, a communication delay is included in the input and has to be\r\ntaken into account if one of the two jobs is scheduled on the server, the other\r\nin the cloud. The server can process jobs sequentially, whereas the cloud can\r\nserve as many as needed in parallel, but induces costs. We consider both\r\nmakespan and cost minimization. The main results are an FPTAS with respect for\r\nthe makespan objective for a fairly general case and strong hardness for the\r\ncase with unit processing times and delays."}],"publication":"arXiv:2108.02109","citation":{"chicago":"Maack, Marten, Friedhelm Meyer auf der Heide, and Simon Pukrop. “Full Version -- Server Cloud Scheduling.” <i>ArXiv:2108.02109</i>, 2021.","short":"M. Maack, F. Meyer auf der Heide, S. Pukrop, ArXiv:2108.02109 (2021).","ieee":"M. Maack, F. Meyer auf der Heide, and S. Pukrop, “Full Version -- Server Cloud Scheduling,” <i>arXiv:2108.02109</i>. 2021.","apa":"Maack, M., Meyer auf der Heide, F., &#38; Pukrop, S. (2021). Full Version -- Server Cloud Scheduling. In <i>arXiv:2108.02109</i>.","bibtex":"@article{Maack_Meyer auf der Heide_Pukrop_2021, title={Full Version -- Server Cloud Scheduling}, journal={arXiv:2108.02109}, author={Maack, Marten and Meyer auf der Heide, Friedhelm and Pukrop, Simon}, year={2021} }","ama":"Maack M, Meyer auf der Heide F, Pukrop S. Full Version -- Server Cloud Scheduling. <i>arXiv:210802109</i>. Published online 2021.","mla":"Maack, Marten, et al. “Full Version -- Server Cloud Scheduling.” <i>ArXiv:2108.02109</i>, 2021."}}]