--- _id: '33461' abstract: - lang: eng text: Data-driven models for nonlinear dynamical systems based on approximating the underlying Koopman operator or generator have proven to be successful tools for forecasting, feature learning, state estimation, and control. It has become well known that the Koopman generators for control-affine systems also have affine dependence on the input, leading to convenient finite-dimensional bilinear approximations of the dynamics. Yet there are still two main obstacles that limit the scope of current approaches for approximating the Koopman generators of systems with actuation. First, the performance of existing methods depends heavily on the choice of basis functions over which the Koopman generator is to be approximated; and there is currently no universal way to choose them for systems that are not measure preserving. Secondly, if we do not observe the full state, we may not gain access to a sufficiently rich collection of such functions to describe the dynamics. This is because the commonly used method of forming time-delayed observables fails when there is actuation. To remedy these issues, we write the dynamics of observables governed by the Koopman generator as a bilinear hidden Markov model, and determine the model parameters using the expectation-maximization (EM) algorithm. The E-step involves a standard Kalman filter and smoother, while the M-step resembles control-affine dynamic mode decomposition for the generator. We demonstrate the performance of this method on three examples, including recovery of a finite-dimensional Koopman-invariant subspace for an actuated system with a slow manifold; estimation of Koopman eigenfunctions for the unforced Duffing equation; and model-predictive control of a fluidic pinball system based only on noisy observations of lift and drag. author: - first_name: Samuel E. full_name: Otto, Samuel E. last_name: Otto - first_name: Sebastian full_name: Peitz, Sebastian id: '47427' last_name: Peitz orcid: 0000-0002-3389-793X - first_name: Clarence W. full_name: Rowley, Clarence W. last_name: Rowley citation: ama: Otto SE, Peitz S, Rowley CW. Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories. SIAM Journal on Applied Dynamical Systems. 2024;23(1):885-923. doi:10.1137/22M1523601 apa: Otto, S. E., Peitz, S., & Rowley, C. W. (2024). Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories. SIAM Journal on Applied Dynamical Systems, 23(1), 885–923. https://doi.org/10.1137/22M1523601 bibtex: '@article{Otto_Peitz_Rowley_2024, title={Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories}, volume={23}, DOI={10.1137/22M1523601}, number={1}, journal={SIAM Journal on Applied Dynamical Systems}, publisher={SIAM}, author={Otto, Samuel E. and Peitz, Sebastian and Rowley, Clarence W.}, year={2024}, pages={885–923} }' chicago: 'Otto, Samuel E., Sebastian Peitz, and Clarence W. Rowley. “Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories.” SIAM Journal on Applied Dynamical Systems 23, no. 1 (2024): 885–923. https://doi.org/10.1137/22M1523601.' ieee: 'S. E. Otto, S. Peitz, and C. W. Rowley, “Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories,” SIAM Journal on Applied Dynamical Systems, vol. 23, no. 1, pp. 885–923, 2024, doi: 10.1137/22M1523601.' mla: Otto, Samuel E., et al. “Learning Bilinear Models of Actuated Koopman Generators from  Partially-Observed Trajectories.” SIAM Journal on Applied Dynamical Systems, vol. 23, no. 1, SIAM, 2024, pp. 885–923, doi:10.1137/22M1523601. short: S.E. Otto, S. Peitz, C.W. Rowley, SIAM Journal on Applied Dynamical Systems 23 (2024) 885–923. date_created: 2022-09-22T07:21:40Z date_updated: 2024-03-18T10:40:08Z department: - _id: '655' doi: 10.1137/22M1523601 external_id: arxiv: - '2209.09977' intvolume: ' 23' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/pdf/2209.09977.pdf oa: '1' page: 885-923 project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: SIAM Journal on Applied Dynamical Systems publication_status: published publisher: SIAM status: public title: Learning Bilinear Models of Actuated Koopman Generators from Partially-Observed Trajectories type: journal_article user_id: '47427' volume: 23 year: '2024' ... --- _id: '46469' abstract: - lang: eng text: 'We show how to learn discrete field theories from observational data of fields on a space-time lattice. For this, we train a neural network model of a discrete Lagrangian density such that the discrete Euler--Lagrange equations are consistent with the given training data. We, thus, obtain a structure-preserving machine learning architecture. Lagrangian densities are not uniquely defined by the solutions of a field theory. We introduce a technique to derive regularisers for the training process which optimise numerical regularity of the discrete field theory. Minimisation of the regularisers guarantees that close to the training data the discrete field theory behaves robust and efficient when used in numerical simulations. Further, we show how to identify structurally simple solutions of the underlying continuous field theory such as travelling waves. This is possible even when travelling waves are not present in the training data. This is compared to data-driven model order reduction based approaches, which struggle to identify suitable latent spaces containing structurally simple solutions when these are not present in the training data. Ideas are demonstrated on examples based on the wave equation and the Schrödinger equation. ' article_number: '013104' article_type: original author: - first_name: Christian full_name: Offen, Christian id: '85279' last_name: Offen orcid: 0000-0002-5940-8057 - first_name: Sina full_name: Ober-Blöbaum, Sina id: '16494' last_name: Ober-Blöbaum citation: ama: Offen C, Ober-Blöbaum S. Learning of discrete models of variational PDEs from data. Chaos. 2024;34(1). doi:10.1063/5.0172287 apa: Offen, C., & Ober-Blöbaum, S. (2024). Learning of discrete models of variational PDEs from data. Chaos, 34(1), Article 013104. https://doi.org/10.1063/5.0172287 bibtex: '@article{Offen_Ober-Blöbaum_2024, title={Learning of discrete models of variational PDEs from data}, volume={34}, DOI={10.1063/5.0172287}, number={1013104}, journal={Chaos}, publisher={AIP Publishing}, author={Offen, Christian and Ober-Blöbaum, Sina}, year={2024} }' chicago: Offen, Christian, and Sina Ober-Blöbaum. “Learning of Discrete Models of Variational PDEs from Data.” Chaos 34, no. 1 (2024). https://doi.org/10.1063/5.0172287. ieee: 'C. Offen and S. Ober-Blöbaum, “Learning of discrete models of variational PDEs from data,” Chaos, vol. 34, no. 1, Art. no. 013104, 2024, doi: 10.1063/5.0172287.' mla: Offen, Christian, and Sina Ober-Blöbaum. “Learning of Discrete Models of Variational PDEs from Data.” Chaos, vol. 34, no. 1, 013104, AIP Publishing, 2024, doi:10.1063/5.0172287. short: C. Offen, S. Ober-Blöbaum, Chaos 34 (2024). date_created: 2023-08-10T08:24:48Z date_updated: 2024-01-09T11:29:06Z ddc: - '510' department: - _id: '636' doi: 10.1063/5.0172287 external_id: arxiv: - '2308.05082 ' file: - access_level: open_access content_type: application/pdf creator: coffen date_created: 2024-01-09T10:48:38Z date_updated: 2024-01-09T10:48:38Z file_id: '50376' file_name: Accepted manuscript with AIP banner CHA23-AR-01370.pdf file_size: 13222105 relation: main_file title: Accepted Manuscript Chaos - access_level: open_access content_type: application/pdf creator: coffen date_created: 2024-01-09T11:19:49Z date_updated: 2024-01-09T11:19:49Z description: |- We show how to learn discrete field theories from observational data of fields on a space-time lattice. For this, we train a neural network model of a discrete Lagrangian density such that the discrete Euler–Lagrange equations are consistent with the given training data. We, thus, obtain a structure-preserving machine learning architecture. Lagrangian densities are not uniquely defined by the solutions of a field theory. We introduce a technique to derive regularisers for the training process which optimise numerical regularity of the discrete field theory. Minimisation of the regularisers guarantees that close to the training data the discrete field theory behaves robust and efficient when used in numerical simulations. Further, we show how to identify structurally simple solutions of the underlying continuous field theory such as travelling waves. This is possible even when travelling waves are not present in the training data. This is compared to data-driven model order reduction based approaches, which struggle to identify suitable latent spaces containing structurally simple solutions when these are not present in the training data. Ideas are demonstrated on examples based on the wave equation and the Schrödinger equation. file_id: '50390' file_name: LDensityPDE_AIP.pdf file_size: 12960884 relation: main_file title: Learning of discrete models of variational PDEs from data file_date_updated: 2024-01-09T11:19:49Z has_accepted_license: '1' intvolume: ' 34' issue: '1' language: - iso: eng license: https://creativecommons.org/licenses/by/4.0/ oa: '1' publication: Chaos publication_identifier: issn: - 1054-1500 publication_status: published publisher: AIP Publishing quality_controlled: '1' related_material: link: - description: GitHub relation: software url: https://github.com/Christian-Offen/DLNN_pde status: public title: Learning of discrete models of variational PDEs from data type: journal_article user_id: '85279' volume: 34 year: '2024' ... --- _id: '46081' author: - first_name: Maria full_name: Harnack, Maria id: '54828' last_name: Harnack citation: ama: Harnack M. Lebendiges Silberschmiedehandwerk in Westfalen am Beispiel der 1892 gegründeten Werkstatt Cassau in Paderborn. Graugold Magazin für Alltagskultur. apa: Harnack, M. (n.d.). Lebendiges Silberschmiedehandwerk in Westfalen am Beispiel der 1892 gegründeten Werkstatt Cassau in Paderborn. Graugold. Magazin Für Alltagskultur. bibtex: '@article{Harnack, title={Lebendiges Silberschmiedehandwerk in Westfalen am Beispiel der 1892 gegründeten Werkstatt Cassau in Paderborn}, journal={Graugold. Magazin für Alltagskultur}, author={Harnack, Maria} }' chicago: Harnack, Maria. “Lebendiges Silberschmiedehandwerk in Westfalen Am Beispiel Der 1892 Gegründeten Werkstatt Cassau in Paderborn.” Graugold. Magazin Für Alltagskultur, n.d. ieee: M. Harnack, “Lebendiges Silberschmiedehandwerk in Westfalen am Beispiel der 1892 gegründeten Werkstatt Cassau in Paderborn,” Graugold. Magazin für Alltagskultur. mla: Harnack, Maria. “Lebendiges Silberschmiedehandwerk in Westfalen Am Beispiel Der 1892 Gegründeten Werkstatt Cassau in Paderborn.” Graugold. Magazin Für Alltagskultur. short: M. Harnack, Graugold. Magazin Für Alltagskultur (n.d.). date_created: 2023-07-18T19:59:16Z date_updated: 2023-07-19T07:17:00Z language: - iso: eng publication: Graugold. Magazin für Alltagskultur publication_status: accepted status: public title: Lebendiges Silberschmiedehandwerk in Westfalen am Beispiel der 1892 gegründeten Werkstatt Cassau in Paderborn type: journal_article user_id: '54828' year: '2024' ... --- _id: '52215' author: - first_name: Vinicius full_name: Carillo Beber, Vinicius last_name: Carillo Beber - first_name: Pedro full_name: Fernandes, Pedro last_name: Fernandes - first_name: Christof full_name: Nagel, Christof last_name: Nagel - first_name: Christian full_name: Köster, Christian last_name: Köster - first_name: Anton full_name: Matzenmiller, Anton last_name: Matzenmiller - first_name: Mathias full_name: Hecht, Mathias last_name: Hecht - first_name: Jörg full_name: Baumgartner, Jörg last_name: Baumgartner - first_name: Tobias full_name: Melz, Tobias last_name: Melz - first_name: Karina full_name: Tews, Karina id: '40263' last_name: Tews - first_name: Serkan full_name: Çavdar, Serkan id: '36456' last_name: Çavdar - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: 'Carillo Beber V, Fernandes P, Nagel C, et al. Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden. In: 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik. ; 2024.' apa: 'Carillo Beber, V., Fernandes, P., Nagel, C., Köster, C., Matzenmiller, A., Hecht, M., Baumgartner, J., Melz, T., Tews, K., Çavdar, S., & Meschut, G. (2024). Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden. 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik. 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik, Köln.' bibtex: '@inproceedings{Carillo Beber_Fernandes_Nagel_Köster_Matzenmiller_Hecht_Baumgartner_Melz_Tews_Çavdar_et al._2024, title={Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden}, booktitle={24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}, author={Carillo Beber, Vinicius and Fernandes, Pedro and Nagel, Christof and Köster, Christian and Matzenmiller, Anton and Hecht, Mathias and Baumgartner, Jörg and Melz, Tobias and Tews, Karina and Çavdar, Serkan and et al.}, year={2024} }' chicago: 'Carillo Beber, Vinicius, Pedro Fernandes, Christof Nagel, Christian Köster, Anton Matzenmiller, Mathias Hecht, Jörg Baumgartner, et al. “Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden.” In 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik, 2024.' ieee: 'V. Carillo Beber et al., “Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden,” presented at the 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik, Köln, 2024.' mla: 'Carillo Beber, Vinicius, et al. “Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden.” 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik, 2024.' short: 'V. Carillo Beber, P. Fernandes, C. Nagel, C. Köster, A. Matzenmiller, M. Hecht, J. Baumgartner, T. Melz, K. Tews, S. Çavdar, G. Meschut, in: 24. Kolloquium: Gemeinsame Forschung in der Klebtechnik, 2024.' conference: end_date: 2024-02-28 location: Köln name: '24. Kolloquium: Gemeinsame Forschung in der Klebtechnik' start_date: 2024-02-27 date_created: 2024-02-29T12:29:17Z date_updated: 2024-02-29T12:33:37Z department: - _id: '157' language: - iso: ger publication: '24. Kolloquium: Gemeinsame Forschung in der Klebtechnik' status: public title: Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden type: conference user_id: '40263' year: '2024' ... --- _id: '51129' citation: ama: Herzig B, Eickelmann B, Schwabl F, Schulze J, Niemann J, eds. Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven. Waxmann Verlag GmbH apa: Herzig, B., Eickelmann, B., Schwabl, F., Schulze, J., & Niemann, J. (Eds.). (n.d.). Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven. Waxmann Verlag GmbH. bibtex: '@book{Herzig_Eickelmann_Schwabl_Schulze_Niemann, place={Münster}, title={Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven}, publisher={Waxmann Verlag GmbH} }' chicago: 'Herzig, Bardo, Birgit Eickelmann, Franziska Schwabl, J. Schulze, and Jan Niemann, eds. Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven. Münster: Waxmann Verlag GmbH, n.d.' ieee: 'B. Herzig, B. Eickelmann, F. Schwabl, J. Schulze, and J. Niemann, Eds., Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven. Münster: Waxmann Verlag GmbH.' mla: Herzig, Bardo, et al., editors. Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven. Waxmann Verlag GmbH. short: B. Herzig, B. Eickelmann, F. Schwabl, J. Schulze, J. Niemann, eds., Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven, Waxmann Verlag GmbH, Münster, n.d. date_created: 2024-02-05T08:11:03Z date_updated: 2024-02-05T08:12:13Z department: - _id: '462' editor: - first_name: Bardo full_name: Herzig, Bardo id: '217' last_name: Herzig - first_name: Birgit full_name: Eickelmann, Birgit id: '40387' last_name: Eickelmann - first_name: Franziska full_name: Schwabl, Franziska id: '37157' last_name: Schwabl - first_name: J. full_name: Schulze, J. last_name: Schulze - first_name: Jan full_name: Niemann, Jan id: '32467' last_name: Niemann language: - iso: ger place: Münster publication_status: inpress publisher: Waxmann Verlag GmbH status: public title: Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven type: book_editor user_id: '40387' year: '2024' ... --- _id: '17740' author: - first_name: Volker full_name: Peckhaus, Volker id: '391' last_name: Peckhaus citation: ama: 'Peckhaus V. Leibniz’s Influence on 19th Century Logic. In: Zalta EN., Nodelman U, eds. The Stanford Encyclopedia of Philosophy, First Published Sep 4, 2009, Substantive Revision Feb 2, 2024. ; 2024.' apa: Peckhaus, V. (2024). Leibniz’s Influence on 19th Century Logic. In E. N. . Zalta & U. Nodelman (Eds.), The Stanford Encyclopedia of Philosophy, first published Sep 4, 2009, substantive revision Feb 2, 2024. bibtex: '@inbook{Peckhaus_2024, title={Leibniz’s Influence on 19th Century Logic}, booktitle={The Stanford Encyclopedia of Philosophy, first published Sep 4, 2009, substantive revision Feb 2, 2024}, author={Peckhaus, Volker}, editor={Zalta, Edward N.. and Nodelman, Uri}, year={2024} }' chicago: Peckhaus, Volker. “Leibniz’s Influence on 19th Century Logic.” In The Stanford Encyclopedia of Philosophy, First Published Sep 4, 2009, Substantive Revision Feb 2, 2024, edited by Edward N.. Zalta and Uri Nodelman, 2024. ieee: V. Peckhaus, “Leibniz’s Influence on 19th Century Logic,” in The Stanford Encyclopedia of Philosophy, first published Sep 4, 2009, substantive revision Feb 2, 2024, E. N. . Zalta and U. Nodelman, Eds. 2024. mla: Peckhaus, Volker. “Leibniz’s Influence on 19th Century Logic.” The Stanford Encyclopedia of Philosophy, First Published Sep 4, 2009, Substantive Revision Feb 2, 2024, edited by Edward N.. Zalta and Uri Nodelman, 2024. short: 'V. Peckhaus, in: E.N.. Zalta, U. Nodelman (Eds.), The Stanford Encyclopedia of Philosophy, First Published Sep 4, 2009, Substantive Revision Feb 2, 2024, 2024.' date_created: 2020-08-10T06:08:50Z date_updated: 2024-02-09T22:38:15Z department: - _id: '520' editor: - first_name: Edward N.. full_name: Zalta, Edward N.. last_name: Zalta - first_name: Uri full_name: Nodelman, Uri last_name: Nodelman language: - iso: eng main_file_link: - open_access: '1' url: https://plato.stanford.edu/entries/leibniz-logic-influence/ oa: '1' publication: The Stanford Encyclopedia of Philosophy, first published Sep 4, 2009, substantive revision Feb 2, 2024 status: public title: Leibniz’s Influence on 19th Century Logic type: encyclopedia_article user_id: '391' year: '2024' ... --- _id: '49504' author: - first_name: Hendrik full_name: Schlieper, Hendrik last_name: Schlieper citation: ama: Schlieper H. Liebestragödie. Genealogien Einer Französischen Gattung Des 17. Jahrhunderts. Brill / Fink apa: Schlieper, H. (n.d.). Liebestragödie. Genealogien einer französischen Gattung des 17. Jahrhunderts. Brill / Fink . bibtex: '@book{Schlieper, place={Paderborn}, series={Poesis. Schriften zu Literatur und den Künsten der Frühmoderne / Habilitationsschrift, Universität Paderborn}, title={Liebestragödie. Genealogien einer französischen Gattung des 17. Jahrhunderts}, publisher={Brill / Fink }, author={Schlieper, Hendrik}, collection={Poesis. Schriften zu Literatur und den Künsten der Frühmoderne / Habilitationsschrift, Universität Paderborn} }' chicago: 'Schlieper, Hendrik. Liebestragödie. Genealogien Einer Französischen Gattung Des 17. Jahrhunderts. Poesis. Schriften Zu Literatur Und Den Künsten Der Frühmoderne / Habilitationsschrift, Universität Paderborn. Paderborn: Brill / Fink , n.d.' ieee: 'H. Schlieper, Liebestragödie. Genealogien einer französischen Gattung des 17. Jahrhunderts. Paderborn: Brill / Fink .' mla: Schlieper, Hendrik. Liebestragödie. Genealogien Einer Französischen Gattung Des 17. Jahrhunderts. Brill / Fink . short: H. Schlieper, Liebestragödie. Genealogien Einer Französischen Gattung Des 17. Jahrhunderts, Brill / Fink , Paderborn, n.d. date_created: 2023-12-06T09:35:44Z date_updated: 2023-12-06T09:37:10Z department: - _id: '116' language: - iso: eng place: Paderborn publication_status: inpress publisher: 'Brill / Fink ' series_title: Poesis. Schriften zu Literatur und den Künsten der Frühmoderne / Habilitationsschrift, Universität Paderborn status: public title: Liebestragödie. Genealogien einer französischen Gattung des 17. Jahrhunderts type: book user_id: '29963' year: '2024' ... --- _id: '50840' abstract: - lang: eng text: Superconducting nanowire single-photon detectors (SNSPDs) have been widely used to study the discrete nature of quantum states of light in the form of photon-counting experiments. We show that SNSPDs can also be used to study continuous variables of optical quantum states by performing homodyne detection at a bandwidth of 400 kHz. By measuring the interference of a continuous-wave field of a local oscillator with the field of the vacuum state using two SNSPDs, we show that the variance of the difference in count rates is linearly proportional to the photon flux of the local oscillator over almost five orders of magnitude. The resulting shot-noise clearance of (46.0 ± 1.1) dB is the highest reported clearance for a balanced optical homodyne detector, demonstrating their potential for measuring highly squeezed states in the continuous-wave regime. In addition, we measured a CMRR = 22.4 dB. From the joint click counting statistics, we also measure the phase-dependent quadrature of a weak coherent state to demonstrate our device’s functionality as a homodyne detector. article_number: '1' author: - first_name: Maximilian full_name: Protte, Maximilian id: '46170' last_name: Protte - first_name: Timon full_name: Schapeler, Timon id: '55629' last_name: Schapeler orcid: 0000-0001-7652-1716 - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: ama: Protte M, Schapeler T, Sperling J, Bartley T. Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors. Optica Quantum. 2024;2(1). doi:10.1364/opticaq.502201 apa: Protte, M., Schapeler, T., Sperling, J., & Bartley, T. (2024). Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors. Optica Quantum, 2(1), Article 1. https://doi.org/10.1364/opticaq.502201 bibtex: '@article{Protte_Schapeler_Sperling_Bartley_2024, title={Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors}, volume={2}, DOI={10.1364/opticaq.502201}, number={11}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Protte, Maximilian and Schapeler, Timon and Sperling, Jan and Bartley, Tim}, year={2024} }' chicago: Protte, Maximilian, Timon Schapeler, Jan Sperling, and Tim Bartley. “Low-Noise Balanced Homodyne Detection with Superconducting Nanowire Single-Photon Detectors.” Optica Quantum 2, no. 1 (2024). https://doi.org/10.1364/opticaq.502201. ieee: 'M. Protte, T. Schapeler, J. Sperling, and T. Bartley, “Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors,” Optica Quantum, vol. 2, no. 1, Art. no. 1, 2024, doi: 10.1364/opticaq.502201.' mla: Protte, Maximilian, et al. “Low-Noise Balanced Homodyne Detection with Superconducting Nanowire Single-Photon Detectors.” Optica Quantum, vol. 2, no. 1, 1, Optica Publishing Group, 2024, doi:10.1364/opticaq.502201. short: M. Protte, T. Schapeler, J. Sperling, T. Bartley, Optica Quantum 2 (2024). date_created: 2024-01-25T11:48:02Z date_updated: 2024-01-25T11:54:14Z department: - _id: '15' - _id: '623' doi: 10.1364/opticaq.502201 intvolume: ' 2' issue: '1' language: - iso: eng publication: Optica Quantum publication_identifier: issn: - 2837-6714 publication_status: published publisher: Optica Publishing Group status: public title: Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors type: journal_article user_id: '55629' volume: 2 year: '2024' ... --- _id: '51133' abstract: - lang: eng text: In order to standardize spray flame synthesis (SFS) studies, intensive work has been done in recent years on the design of burner types. Thus, in 2019, the so-called SpraySyn1 burner was introduced (SS1), which was subsequently characterized in numerical and experimental studies. Based on this research, a modification of the nozzle design was proposed, which has now been considered in the successor model, SpraySyn2 (SS2). As little is known about the effect of the nozzle adaptation on the particle formation, we operated both burners under identical operating conditions to produce maghemite. The final powder comparison showed that SS2 yielded considerable higher specific surface areas (associated with smaller primary particle sizes), lower polydispersity, and higher phase purity. To obtain further information on the size distributions of aggregates and agglomerates generated by SS2, aerosol samples were extracted by hole in a tube (HIAT) sampling and characterized by scanning mobility particle sizing (SMPS). Samples were extracted along the centerline at different heights above the burner (HAB) above the visible flame tip (>7 cm), and quenching experiments were performed to extract the aerosol samples at different dilution rates. Thereby, it was demonstrated that performing detailed quenching experiments is crucial for obtaining representative HIAT-SMPS data. In particular, agglomerates/aggregate sizes were overestimated by up to ~70 % if samples were not sufficiently diluted. If sufficient dilution was applied, distribution widths and mean particle mobility diameters were determined with high accuracy (sample standard derivation <5 %). Our data suggested the evolution of primary particle sizes was mostly completed <7 cm HAB and it was shown aggregates/agglomerates present above the visible flame were compact in structure (non- fractal). The mean diameter of the particle ensemble grew along the centerline from 6.9 nm (7 cm) to 11.4 nm (15 cm), while distribution widths grew from 1.42 to 1.52. citation: ama: Tischendorf R, Massopo O, Schmid H-J, et al., eds. Maghemite Nanoparticles Synthesis via Spray Flame Synthesis and Particle Characterization by Hole in a Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS). Elsevier; 2024. doi:https://doi.org/10.1016/j.jaecs.2023.100235 apa: Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS). (2024). In R. Tischendorf, O. Massopo, H.-J. Schmid, O. Pyrmak, S. Dupont, F. Fröde, H. Pitsch, & R. Kneer (Eds.), Applications in Energy and Combustion Science. Elsevier. https://doi.org/10.1016/j.jaecs.2023.100235 bibtex: '@book{Tischendorf_Massopo_Schmid_Pyrmak_Dupont_Fröde_Pitsch_Kneer_2024, title={Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS)}, DOI={https://doi.org/10.1016/j.jaecs.2023.100235}, journal={Applications in Energy and Combustion Science}, publisher={Elsevier}, year={2024} }' chicago: Tischendorf, Ricardo, Orlando Massopo, Hans-Joachim Schmid, Olek Pyrmak, Sophie Dupont, Fabian Fröde, Heinz Pitsch, and Reinhold Kneer, eds. Maghemite Nanoparticles Synthesis via Spray Flame Synthesis and Particle Characterization by Hole in a Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS). Applications in Energy and Combustion Science. Elsevier, 2024. https://doi.org/10.1016/j.jaecs.2023.100235. ieee: R. Tischendorf et al., Eds., Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS). Elsevier, 2024. mla: Tischendorf, Ricardo, et al., editors. “Maghemite Nanoparticles Synthesis via Spray Flame Synthesis and Particle Characterization by Hole in a Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS).” Applications in Energy and Combustion Science, Elsevier, 2024, doi:https://doi.org/10.1016/j.jaecs.2023.100235. short: R. Tischendorf, O. Massopo, H.-J. Schmid, O. Pyrmak, S. Dupont, F. Fröde, H. Pitsch, R. Kneer, eds., Maghemite Nanoparticles Synthesis via Spray Flame Synthesis and Particle Characterization by Hole in a Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS), Elsevier, 2024. date_created: 2024-02-05T12:02:57Z date_updated: 2024-02-05T12:25:00Z ddc: - '660' department: - _id: '150' doi: https://doi.org/10.1016/j.jaecs.2023.100235 editor: - first_name: Ricardo full_name: Tischendorf, Ricardo id: '67002' last_name: Tischendorf - first_name: Orlando full_name: Massopo, Orlando id: '98419' last_name: Massopo - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid orcid: 000-0001-8590-1921 - first_name: Olek full_name: Pyrmak, Olek last_name: Pyrmak - first_name: Sophie full_name: Dupont, Sophie last_name: Dupont - first_name: Fabian full_name: Fröde, Fabian last_name: Fröde - first_name: Heinz full_name: Pitsch, Heinz last_name: Pitsch - first_name: Reinhold full_name: Kneer, Reinhold last_name: Kneer has_accepted_license: '1' keyword: - Flame Spray Pyrolysis - SpraySyn2 - Spray flame synthesis - Maghemite nanoparticles - Gas to particle-conversion - Hole in a tube sampling language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/4.0/ main_file_link: - url: https://www.sciencedirect.com/science/article/pii/S2666352X23001243?ref=cra_js_challenge&fr=RR-1 publication: Applications in Energy and Combustion Science publication_status: published publisher: Elsevier status: public title: Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS) type: journal_editor user_id: '98419' year: '2024' ... --- _id: '49815' author: - first_name: Andrea full_name: Taschl-Erber, Andrea last_name: Taschl-Erber citation: ama: 'Taschl-Erber A. Making “the Two” Into One Body: De- and Recategorization of (Un-)Circumcision,. In: Annette W, ed. Reconsidering the Letter to the Ephesians in Context . Wissenschaftliche Untersuchungen zum Neuen Testament. ; 2024.' apa: 'Taschl-Erber, A. (2024). Making “the Two” Into One Body: De- and Recategorization of (Un-)Circumcision,. In W. Annette (Ed.), Reconsidering the Letter to the Ephesians in Context .' bibtex: '@inbook{Taschl-Erber_2024, place={Tübingen}, series={Wissenschaftliche Untersuchungen zum Neuen Testament}, title={Making “the Two” Into One Body: De- and Recategorization of (Un-)Circumcision,}, booktitle={Reconsidering the Letter to the Ephesians in Context }, author={Taschl-Erber, Andrea}, editor={Annette, Weissenrieder}, year={2024}, collection={Wissenschaftliche Untersuchungen zum Neuen Testament} }' chicago: 'Taschl-Erber, Andrea. “Making ‘the Two’ Into One Body: De- and Recategorization of (Un-)Circumcision,.” In Reconsidering the Letter to the Ephesians in Context , edited by Weissenrieder Annette. Wissenschaftliche Untersuchungen Zum Neuen Testament. Tübingen, 2024.' ieee: 'A. Taschl-Erber, “Making ‘the Two’ Into One Body: De- and Recategorization of (Un-)Circumcision,” in Reconsidering the Letter to the Ephesians in Context , W. Annette, Ed. Tübingen, 2024.' mla: 'Taschl-Erber, Andrea. “Making ‘the Two’ Into One Body: De- and Recategorization of (Un-)Circumcision,.” Reconsidering the Letter to the Ephesians in Context , edited by Weissenrieder Annette, 2024.' short: 'A. Taschl-Erber, in: W. Annette (Ed.), Reconsidering the Letter to the Ephesians in Context , Tübingen, 2024.' date_created: 2023-12-18T16:40:32Z date_updated: 2023-12-18T16:44:31Z editor: - first_name: Weissenrieder full_name: Annette, Weissenrieder last_name: Annette language: - iso: eng place: Tübingen publication: 'Reconsidering the Letter to the Ephesians in Context ' series_title: Wissenschaftliche Untersuchungen zum Neuen Testament status: public title: 'Making “the Two” Into One Body: De- and Recategorization of (Un-)Circumcision,' type: book_chapter user_id: '70423' year: '2024' ...