[{"abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Ultrasonic transmission measurements can be used for material characterization, as the propagation time of sound waves and thus their velocity depends on the elastic material parameters. Measurement results for the elastic material parameters are acquired non-destructively using ultrasonic transmission measurements of hollow cylindrical polymer specimens. To determine the material parameters, an inverse approach is used comparing measurements with simulated data. Previous studies show that the procedure exhibits low sensitivity with respect to the shear parameters of the material. In order to increase the sensitivity, we propose to apply a spatially annular excitation on the base of the specimen. As a measure to analyse the sensitivities with respect to all parameters and their linear independence, we observe the volume of the parallelotope of the sensitivity vectors. Here, a scaled boundary finite element formulation of wave propagation in the specimen is expanded to yield derivative information directly, and a sensitivity analysis can be carried out efficiently. Finally, the results of this sensitivity analysis with regard to the annular excitation are also applied to the measurement setup.</jats:p>"}],"publication":"Measurement Science and Technology","keyword":["Sensitivity analysis","Ultrasonic transducer","Guided waves","Polymers","Gram determinant"],"language":[{"iso":"eng"}],"year":"2025","quality_controlled":"1","title":"Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation","publisher":"IOP Publishing","date_created":"2025-05-19T13:30:39Z","status":"public","type":"journal_article","article_type":"original","article_number":"6","funded_apc":"1","project":[{"name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89","grant_number":"409779252"}],"_id":"59995","user_id":"32616","department":[{"_id":"49"}],"citation":{"short":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, B. Henning, Measurement Science and Technology 36 (2025).","bibtex":"@article{Dreiling_Itner_Gravenkamp_Claes_Birk_Henning_2025, title={Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation}, volume={36}, DOI={<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>}, number={6}, journal={Measurement Science and Technology}, publisher={IOP Publishing}, author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Claes, Leander and Birk, Carolin and Henning, Bernd}, year={2025} }","mla":"Dreiling, Dmitrij, et al. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i>, vol. 36, 6, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>.","apa":"Dreiling, D., Itner, D., Gravenkamp, H., Claes, L., Birk, C., &#38; Henning, B. (2025). Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>, <i>36</i>, Article 6. <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>","ama":"Dreiling D, Itner D, Gravenkamp H, Claes L, Birk C, Henning B. Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>. 2025;36. doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>","ieee":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, and B. Henning, “Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation,” <i>Measurement Science and Technology</i>, vol. 36, Art. no. 6, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>.","chicago":"Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Leander Claes, Carolin Birk, and Bernd Henning. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i> 36 (2025). <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>."},"intvolume":"        36","publication_status":"published","publication_identifier":{"issn":["0957-0233","1361-6501"]},"main_file_link":[{"open_access":"1","url":"https://iopscience.iop.org/article/10.1088/1361-6501/add9b6"}],"doi":"10.1088/1361-6501/add9b6","oa":"1","date_updated":"2025-05-27T15:03:38Z","author":[{"last_name":"Dreiling","id":"32616","full_name":"Dreiling, Dmitrij","first_name":"Dmitrij"},{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Leander","orcid":"0000-0002-4393-268X","last_name":"Claes","id":"11829","full_name":"Claes, Leander"},{"first_name":"Carolin","full_name":"Birk, Carolin","last_name":"Birk"},{"last_name":"Henning","full_name":"Henning, Bernd","id":"213","first_name":"Bernd"}],"volume":36},{"publication":"Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025","type":"journal_article","abstract":[{"text":"Auslandsaufenthalte von Studierenden sind im Fach Musikwissenschaft an der Universität Paderborn eher eine Ausnahme. Das hat unterschiedliche Gründe, unter anderem die nicht vorhandene curriculare Verankerung. Dabei belegen diverse Untersuchungen, dass solche Aufenthalte den interkulturellen Kompetenzerwerb und damit Fähigkeiten fördern, die unabhängig vom Fach in einer globalisierten Welt immer größere Relevanz im Berufsleben einnehmen. Im Projekt wurde ein hybrides internationales Kooperationsseminar entwickelt und durchgeführt sowie in Bezug auf den Erwerb dieser wichtigen Schlüsselqualifikation evaluiert. Die Auswertung der unter anderem durch Fragebögen erhobenen Entwicklung konnte deutlich die positiven Auswirkungen eines hybriden Kooperationsseminars auf interkulturelle Kompetenzen, die Auseinandersetzung mit verschiedensten Aspekten einer anderen Kultur, darunter Geschichte, Politik, (Post-)Kolonialismus und den eigenen Privilegien aufzeigen. Zudem lassen sich aus der Evaluation weitere Ideen für rein digitale Formate ableiten. ","lang":"ger"},{"text":"Stays abroad by musicology students at the Paderborn University are the exception rather than the\r\nrule. There are various reasons for this, including the fact that they are not part of the curriculum.\r\nHowever, various studies have shown that such stays support the acquisition of intercultural skills\r\nwhich are becoming increasingly relevant in professional life in a globalised world, regardless of the\r\nsubject. The project developed, implemented, and evaluated a hybrid international cooperation semi-\r\nnar regarding the acquisition of this important key qualification. The evaluation of the course of the\r\nseminar, based among other things on questionnaires, clearly showed the positive effects of a hybrid\r\ncooperation seminar on intercultural competences, the examination of different aspects of another\r\nculture, including history, politics, (post-)colonialism and one's own privileges. In addition, the eval-\r\nuation can be used to derive further ideas for purely digital formats.","lang":"eng"}],"status":"public","_id":"58917","department":[{"_id":"233"}],"user_id":"93940","keyword":["interkulturelle Kompetenz","interkulturelle Sensitivität","Musikwissenschaft","digitale Lehre","hybride Lehre","intercultural competence","intercultural sensitivity","musicology","digital education","hybrid education"],"language":[{"iso":"ger"}],"publication_identifier":{"unknown":["2199-8825"]},"publication_status":"published","issue":"17","year":"2025","intvolume":"        11","page":"218 - 231","citation":{"ieee":"L. Adler, “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare,” <i>Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025</i>, vol. 11, no. 17, pp. 218–231, 2025, doi: <a href=\"https://doi.org/10.3278/HSL2459W\">10.3278/HSL2459W</a>.","chicago":"Adler, Luise. “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare.” <i>Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025</i> 11, no. 17 (2025): 218–31. <a href=\"https://doi.org/10.3278/HSL2459W\">https://doi.org/10.3278/HSL2459W</a>.","ama":"Adler L. Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare. <i>Paderborner Beiträge 2024 die hochschullehre - Themenheft 2025</i>. 2025;11(17):218-231. doi:<a href=\"https://doi.org/10.3278/HSL2459W\">10.3278/HSL2459W</a>","apa":"Adler, L. (2025). Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare. <i>Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025</i>, <i>11</i>(17), 218–231. <a href=\"https://doi.org/10.3278/HSL2459W\">https://doi.org/10.3278/HSL2459W</a>","bibtex":"@article{Adler_2025, title={Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare}, volume={11}, DOI={<a href=\"https://doi.org/10.3278/HSL2459W\">10.3278/HSL2459W</a>}, number={17}, journal={Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025}, publisher={Nerea Vöing, Diana Bücker}, author={Adler, Luise}, year={2025}, pages={218–231} }","mla":"Adler, Luise. “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare.” <i>Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025</i>, vol. 11, no. 17, Nerea Vöing, Diana Bücker, 2025, pp. 218–31, doi:<a href=\"https://doi.org/10.3278/HSL2459W\">10.3278/HSL2459W</a>.","short":"L. Adler, Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025 11 (2025) 218–231."},"date_updated":"2025-03-05T13:13:01Z","publisher":"Nerea Vöing, Diana Bücker","oa":"1","volume":11,"date_created":"2025-03-05T13:12:01Z","author":[{"first_name":"Luise","id":"93940","full_name":"Adler, Luise","last_name":"Adler","orcid":"0009-0002-0150-2638"}],"title":"Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare","doi":"10.3278/HSL2459W","main_file_link":[{"open_access":"1","url":"https://www.wbv.de/shop/Paderborner-Beitraege-2024-HSLT2404W"}]},{"year":"2020","title":"Mincut Sensitivity Data Structures for the Insertion of an Edge","publisher":"Schloss Dagstuhl -- Leibniz-Zentrum für Informatik","date_created":"2020-10-21T12:00:20Z","abstract":[{"lang":"eng","text":"Let G = (V,E) be an undirected graph on n vertices with non-negative capacities on its edges. The mincut sensitivity problem for the insertion of an edge is defined as follows. Build a compact data structure for G and a given set S ⊆ V of vertices that, on receiving any edge (x,y) ∈ S×S of positive capacity as query input, can efficiently report the set of all pairs from S× S whose mincut value increases upon insertion of the edge (x,y) to G. The only result that exists for this problem is for a single pair of vertices (Picard and Queyranne, Mathematical Programming Study, 13 (1980), 8-16). We present the following results for the single source and the all-pairs versions of this problem. \r\n1) Single source: Given any designated source vertex s, there exists a data structure of size 𝒪(|S|) that can output all those vertices from S whose mincut value to s increases upon insertion of any given edge. The time taken by the data structure to answer any query is 𝒪(|S|). \r\n2) All-pairs: There exists an 𝒪(|S|²) size data structure that can output all those pairs of vertices from S× S whose mincut value gets increased upon insertion of any given edge. The time taken by the data structure to answer any query is 𝒪(k), where k is the number of pairs of vertices whose mincut increases. \r\nFor both these versions, we also address the problem of reporting the values of the mincuts upon insertion of any given edge. To derive our results, we use interesting insights into the nearest and the farthest mincuts for a pair of vertices. In addition, a crucial result, that we establish and use in our data structures, is that there exists a directed acyclic graph of 𝒪(n) size that compactly stores the farthest mincuts from all vertices of V to a designated vertex s in the graph. We believe that this result is of independent interest, especially, because it also complements a previously existing result by Hariharan et al. (STOC 2007) that the nearest mincuts from all vertices of V to s is a laminar family, and hence, can be stored compactly in a tree of 𝒪(n) size."}],"publication":"28th Annual European Symposium on Algorithms (ESA 2020)","keyword":["Mincut","Sensitivity","Data Structure"],"language":[{"iso":"eng"}],"place":"Dagstuhl, Germany","page":"12:1-12:14","intvolume":"       173","citation":{"ama":"Baswana S, Gupta S, Knollmann T. Mincut Sensitivity Data Structures for the Insertion of an Edge. In: Grandoni F, Herman G, Sanders P, eds. <i>28th Annual European Symposium on Algorithms (ESA 2020)</i>. Vol 173. Leibniz International Proceedings in Informatics (LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik; 2020:12:1-12:14. doi:<a href=\"https://doi.org/10.4230/LIPIcs.ESA.2020.12\">10.4230/LIPIcs.ESA.2020.12</a>","ieee":"S. Baswana, S. Gupta, and T. Knollmann, “Mincut Sensitivity Data Structures for the Insertion of an Edge,” in <i>28th Annual European Symposium on Algorithms (ESA 2020)</i>, 2020, vol. 173, pp. 12:1-12:14.","chicago":"Baswana, Surender, Shiv Gupta, and Till Knollmann. “Mincut Sensitivity Data Structures for the Insertion of an Edge.” In <i>28th Annual European Symposium on Algorithms (ESA 2020)</i>, edited by Fabrizio Grandoni, Grzegorz Herman, and Peter Sanders, 173:12:1-12:14. Leibniz International Proceedings in Informatics (LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2020. <a href=\"https://doi.org/10.4230/LIPIcs.ESA.2020.12\">https://doi.org/10.4230/LIPIcs.ESA.2020.12</a>.","apa":"Baswana, S., Gupta, S., &#38; Knollmann, T. (2020). Mincut Sensitivity Data Structures for the Insertion of an Edge. In F. Grandoni, G. Herman, &#38; P. Sanders (Eds.), <i>28th Annual European Symposium on Algorithms (ESA 2020)</i> (Vol. 173, pp. 12:1-12:14). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.ESA.2020.12\">https://doi.org/10.4230/LIPIcs.ESA.2020.12</a>","bibtex":"@inproceedings{Baswana_Gupta_Knollmann_2020, place={Dagstuhl, Germany}, series={Leibniz International Proceedings in Informatics (LIPIcs)}, title={Mincut Sensitivity Data Structures for the Insertion of an Edge}, volume={173}, DOI={<a href=\"https://doi.org/10.4230/LIPIcs.ESA.2020.12\">10.4230/LIPIcs.ESA.2020.12</a>}, booktitle={28th Annual European Symposium on Algorithms (ESA 2020)}, publisher={Schloss Dagstuhl -- Leibniz-Zentrum für Informatik}, author={Baswana, Surender and Gupta, Shiv and Knollmann, Till}, editor={Grandoni, Fabrizio and Herman, Grzegorz and Sanders, PeterEditors}, year={2020}, pages={12:1-12:14}, collection={Leibniz International Proceedings in Informatics (LIPIcs)} }","mla":"Baswana, Surender, et al. “Mincut Sensitivity Data Structures for the Insertion of an Edge.” <i>28th Annual European Symposium on Algorithms (ESA 2020)</i>, edited by Fabrizio Grandoni et al., vol. 173, Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2020, pp. 12:1-12:14, doi:<a href=\"https://doi.org/10.4230/LIPIcs.ESA.2020.12\">10.4230/LIPIcs.ESA.2020.12</a>.","short":"S. Baswana, S. Gupta, T. Knollmann, in: F. Grandoni, G. Herman, P. Sanders (Eds.), 28th Annual European Symposium on Algorithms (ESA 2020), Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2020, pp. 12:1-12:14."},"publication_identifier":{"issn":["1868-8969"],"isbn":["978-3-95977-162-7"]},"doi":"10.4230/LIPIcs.ESA.2020.12","date_updated":"2022-01-06T06:54:20Z","volume":173,"author":[{"last_name":"Baswana","full_name":"Baswana, Surender","first_name":"Surender"},{"full_name":"Gupta, Shiv","last_name":"Gupta","first_name":"Shiv"},{"first_name":"Till","id":"39241","full_name":"Knollmann, Till","last_name":"Knollmann","orcid":"0000-0003-2014-4696"}],"editor":[{"full_name":"Grandoni, Fabrizio","last_name":"Grandoni","first_name":"Fabrizio"},{"first_name":"Grzegorz","last_name":"Herman","full_name":"Herman, Grzegorz"},{"first_name":"Peter","last_name":"Sanders","full_name":"Sanders, Peter"}],"status":"public","type":"conference","_id":"20159","department":[{"_id":"63"}],"user_id":"39241","series_title":"Leibniz International Proceedings in Informatics (LIPIcs)"},{"status":"public","publication":"Journal of Advanced Joining Processes. ","type":"journal_article","language":[{"iso":"eng"}],"keyword":["Clinching","process simulation","FEM","pre-straining","sensitivity analysis"],"department":[{"_id":"157"}],"user_id":"34782","_id":"20678","project":[{"_id":"130","name":"TRR 285: TRR 285","grant_number":"418701707"},{"_id":"131","name":"TRR 285 - A: TRR 285 - Project Area A"},{"_id":"135","name":"TRR 285 – A01: TRR 285 - Subproject A01"}],"citation":{"ama":"Bielak CR, Böhnke M, Beck R, Bobbert M, Meschut G. Numerical analysis of the robustness of clinching process considering the pre-forming of the parts . <i>Journal of Advanced Joining Processes </i>. Published online 2020. doi:<a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>","ieee":"C. R. Bielak, M. Böhnke, R. Beck, M. Bobbert, and G. Meschut, “Numerical analysis of the robustness of clinching process considering the pre-forming of the parts ,” <i>Journal of Advanced Joining Processes. </i>, 2020, doi: <a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>.","chicago":"Bielak, Christian Roman, Max Böhnke, Robert Beck, Mathias Bobbert, and Gerson Meschut. “Numerical Analysis of the Robustness of Clinching Process Considering the Pre-Forming of the Parts .” <i>Journal of Advanced Joining Processes. </i>, 2020. <a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>.","short":"C.R. Bielak, M. Böhnke, R. Beck, M. Bobbert, G. Meschut, Journal of Advanced Joining Processes.  (2020).","bibtex":"@article{Bielak_Böhnke_Beck_Bobbert_Meschut_2020, title={Numerical analysis of the robustness of clinching process considering the pre-forming of the parts }, DOI={<a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>}, journal={Journal of Advanced Joining Processes. }, publisher={Elsevier}, author={Bielak, Christian Roman and Böhnke, Max and Beck, Robert and Bobbert, Mathias and Meschut, Gerson}, year={2020} }","mla":"Bielak, Christian Roman, et al. “Numerical Analysis of the Robustness of Clinching Process Considering the Pre-Forming of the Parts .” <i>Journal of Advanced Joining Processes. </i>, Elsevier, 2020, doi:<a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>.","apa":"Bielak, C. R., Böhnke, M., Beck, R., Bobbert, M., &#38; Meschut, G. (2020). Numerical analysis of the robustness of clinching process considering the pre-forming of the parts . <i>Journal of Advanced Joining Processes. </i>. <a href=\"https://doi.org/10.1016/j.jajp.2020.100038\">https://doi.org/10.1016/j.jajp.2020.100038</a>"},"year":"2020","publication_identifier":{"unknown":["https://doi.org/10.1016/j.jajp.2020.100038"]},"publication_status":"published","doi":"https://doi.org/10.1016/j.jajp.2020.100038","title":"Numerical analysis of the robustness of clinching process considering the pre-forming of the parts ","author":[{"first_name":"Christian Roman","last_name":"Bielak","id":"34782","full_name":"Bielak, Christian Roman"},{"last_name":"Böhnke","id":"45779","full_name":"Böhnke, Max","first_name":"Max"},{"first_name":"Robert","id":"38279","full_name":"Beck, Robert","last_name":"Beck"},{"full_name":"Bobbert, Mathias","id":"7850","last_name":"Bobbert","first_name":"Mathias"},{"first_name":"Gerson","last_name":"Meschut","orcid":"0000-0002-2763-1246","full_name":"Meschut, Gerson","id":"32056"}],"date_created":"2020-12-02T16:21:34Z","date_updated":"2022-03-24T09:39:11Z","publisher":"Elsevier"},{"type":"journal_article","publication":"Journal of Catalysis","abstract":[{"text":"CO oxidation is an extensively studied reaction in heterogeneous catalysis due to its seeming simplicity and its great importance for emission control. However, the role of particle size and more specifically structure sensitivity in this reaction is still controversial. In the present study, colloidal “surfactant-free” Pt nanoparticles (NPs) in a size regime of 1–4 nm with narrow size distribution and control over particle size were synthesized and subsequently supported on Al2O3 to prepare model catalysts. CO oxidation was performed using Pt NPs catalysts with particles sizes of 1, 2, 3, and 4 nm at different reaction temperatures. It is shown that the reaction exhibits a particle size effect that depends strongly on the reaction conditions. At 170 °C, the reaction seems to proceed within the same kinetic regime for all particle sizes, but the surface normalized activity depends strongly on the particle size, with maximum activity for nanoparticles 2 nm in diameter. A temperature increase to 200 °C leads to a change of the kinetic regime that depends on the particle size. For Pt NPs 1 nm in diameter a reaction order of 1 for O2 was observed, indicating that O2 adsorbs molecularly and dissociates in a following step, which represents the generally accepted mechanism on Pt surfaces. The reaction order of −1 for CO demonstrates that the surface is saturated with CO under reaction conditions. With increasing particle size, the reaction orders of O2 and CO change. For particles 2 nm in size, an increase in temperature also results in reaction orders of 1 for O2 and −1 for CO; NPs of 3 and 4 nm, even at higher temperatures, show no clear kinetic behavior that can be explained by a single reaction mechanism. Instead, the Boudouard reaction between two adjacent adsorbed CO molecules was identified as an important additional reaction pathway that occurs preferentially on large particles and causes more complex kinetics.","lang":"eng"}],"status":"public","_id":"64018","user_id":"100715","keyword":["Solid state NMR","“Surfactant-free” platinum nanoparticles","CO oxidation","Particle size effect","Structure sensitivity"],"language":[{"iso":"eng"}],"extern":"1","year":"2019","citation":{"short":"S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M. Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 662–672.","bibtex":"@article{Neumann_Gutmann_Buntkowsky_Paul_Thiele_Sievers_Bäumer_Kunz_2019, title={Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts}, volume={377}, DOI={<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>}, journal={Journal of Catalysis}, author={Neumann, Sarah and Gutmann, Torsten and Buntkowsky, Gerd and Paul, Stephen and Thiele, Greg and Sievers, Heiko and Bäumer, Marcus and Kunz, Sebastian}, year={2019}, pages={662–672} }","mla":"Neumann, Sarah, et al. “Insights into the Reaction Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” <i>Journal of Catalysis</i>, vol. 377, 2019, pp. 662–672, doi:<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>.","apa":"Neumann, S., Gutmann, T., Buntkowsky, G., Paul, S., Thiele, G., Sievers, H., Bäumer, M., &#38; Kunz, S. (2019). Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts. <i>Journal of Catalysis</i>, <i>377</i>, 662–672. <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">https://doi.org/10.1016/j.jcat.2019.07.049</a>","ieee":"S. Neumann <i>et al.</i>, “Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts,” <i>Journal of Catalysis</i>, vol. 377, pp. 662–672, 2019, doi: <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>.","chicago":"Neumann, Sarah, Torsten Gutmann, Gerd Buntkowsky, Stephen Paul, Greg Thiele, Heiko Sievers, Marcus Bäumer, and Sebastian Kunz. “Insights into the Reaction Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” <i>Journal of Catalysis</i> 377 (2019): 662–672. <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">https://doi.org/10.1016/j.jcat.2019.07.049</a>.","ama":"Neumann S, Gutmann T, Buntkowsky G, et al. Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts. <i>Journal of Catalysis</i>. 2019;377:662–672. doi:<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>"},"intvolume":"       377","page":"662–672","date_updated":"2026-02-17T16:14:45Z","date_created":"2026-02-07T16:02:06Z","author":[{"full_name":"Neumann, Sarah","last_name":"Neumann","first_name":"Sarah"},{"first_name":"Torsten","id":"118165","full_name":"Gutmann, Torsten","last_name":"Gutmann"},{"first_name":"Gerd","last_name":"Buntkowsky","full_name":"Buntkowsky, Gerd"},{"full_name":"Paul, Stephen","last_name":"Paul","first_name":"Stephen"},{"first_name":"Greg","last_name":"Thiele","full_name":"Thiele, Greg"},{"first_name":"Heiko","full_name":"Sievers, Heiko","last_name":"Sievers"},{"first_name":"Marcus","full_name":"Bäumer, Marcus","last_name":"Bäumer"},{"full_name":"Kunz, Sebastian","last_name":"Kunz","first_name":"Sebastian"}],"volume":377,"title":"Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts","doi":"10.1016/j.jcat.2019.07.049"},{"language":[{"iso":"eng"}],"keyword":["Sensitivity inverse problem ultrasonic material determination"],"department":[{"_id":"49"}],"user_id":"15911","_id":"13892","status":"public","abstract":[{"text":"Several ultrasonic approaches for material determination are formulated in terms of an (nonlinear) inverse problem, e.g. immersion technique (Castaings et al. (2000)) or plate-waveguide techniques (Marzani et al. (2012)). In this contribution we focus on cylindrical waveguides for ultrasonic material determination and especially on the sensitivity of recorded transmission signals to the material properties. We utilize composite scaled sensitivities to determine the information content that can be achieved by the setup to certain parameters and discuss the limitations of the approach.","lang":"eng"}],"type":"conference","title":"Model based sensitivity analysis in the determination of viscoelastic material properties using transmission measurements through circular waveguides","date_created":"2019-10-16T14:23:19Z","author":[{"first_name":"Fabian","full_name":"Bause, Fabian","last_name":"Bause"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Jens","last_name":"Rautenberg","full_name":"Rautenberg, Jens"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"date_updated":"2022-01-06T06:51:46Z","page":"204-207","citation":{"apa":"Bause, F., Gravenkamp, H., Rautenberg, J., &#38; Henning, B. (2015). Model based sensitivity analysis in the determination of viscoelastic material properties using transmission measurements through circular waveguides (pp. 204–207).","short":"F. Bause, H. Gravenkamp, J. Rautenberg, B. Henning, in: 2015, pp. 204–207.","bibtex":"@inproceedings{Bause_Gravenkamp_Rautenberg_Henning_2015, title={Model based sensitivity analysis in the determination of viscoelastic material properties using transmission measurements through circular waveguides}, author={Bause, Fabian and Gravenkamp, Hauke and Rautenberg, Jens and Henning, Bernd}, year={2015}, pages={204–207} }","mla":"Bause, Fabian, et al. <i>Model Based Sensitivity Analysis in the Determination of Viscoelastic Material Properties Using Transmission Measurements through Circular Waveguides</i>. 2015, pp. 204–07.","ama":"Bause F, Gravenkamp H, Rautenberg J, Henning B. Model based sensitivity analysis in the determination of viscoelastic material properties using transmission measurements through circular waveguides. In: ; 2015:204-207.","chicago":"Bause, Fabian, Hauke Gravenkamp, Jens Rautenberg, and Bernd Henning. “Model Based Sensitivity Analysis in the Determination of Viscoelastic Material Properties Using Transmission Measurements through Circular Waveguides,” 204–7, 2015.","ieee":"F. Bause, H. Gravenkamp, J. Rautenberg, and B. Henning, “Model based sensitivity analysis in the determination of viscoelastic material properties using transmission measurements through circular waveguides,” 2015, pp. 204–207."},"year":"2015"},{"title":"Parameter estimation and classification of censored Gaussian data with application to WiFi indoor positioning","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013.pdf"}],"doi":"10.1109/ICASSP.2013.6638353","date_updated":"2022-01-06T06:51:09Z","oa":"1","date_created":"2019-07-12T05:28:48Z","author":[{"full_name":"Hoang, Manh Kha","last_name":"Hoang","first_name":"Manh Kha"},{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"year":"2013","citation":{"apa":"Hoang, M. K., &#38; Haeb-Umbach, R. (2013). Parameter estimation and classification of censored Gaussian data with application to WiFi indoor positioning. In <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i> (pp. 3721–3725). <a href=\"https://doi.org/10.1109/ICASSP.2013.6638353\">https://doi.org/10.1109/ICASSP.2013.6638353</a>","bibtex":"@inproceedings{Hoang_Haeb-Umbach_2013, title={Parameter estimation and classification of censored Gaussian data with application to WiFi indoor positioning}, DOI={<a href=\"https://doi.org/10.1109/ICASSP.2013.6638353\">10.1109/ICASSP.2013.6638353</a>}, booktitle={38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)}, author={Hoang, Manh Kha and Haeb-Umbach, Reinhold}, year={2013}, pages={3721–3725} }","short":"M.K. Hoang, R. Haeb-Umbach, in: 38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013), 2013, pp. 3721–3725.","mla":"Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification of Censored Gaussian Data with Application to WiFi Indoor Positioning.” <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 2013, pp. 3721–25, doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6638353\">10.1109/ICASSP.2013.6638353</a>.","ieee":"M. K. Hoang and R. Haeb-Umbach, “Parameter estimation and classification of censored Gaussian data with application to WiFi indoor positioning,” in <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 2013, pp. 3721–3725.","chicago":"Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification of Censored Gaussian Data with Application to WiFi Indoor Positioning.” In <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 3721–25, 2013. <a href=\"https://doi.org/10.1109/ICASSP.2013.6638353\">https://doi.org/10.1109/ICASSP.2013.6638353</a>.","ama":"Hoang MK, Haeb-Umbach R. Parameter estimation and classification of censored Gaussian data with application to WiFi indoor positioning. In: <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>. ; 2013:3721-3725. doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6638353\">10.1109/ICASSP.2013.6638353</a>"},"page":"3721-3725","publication_identifier":{"issn":["1520-6149"]},"related_material":{"link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013_Poster.pdf","relation":"supplementary_material","description":"Poster"}]},"keyword":["Gaussian processes","Global Positioning System","convergence","expectation-maximisation algorithm","fingerprint identification","indoor radio","signal classification","wireless LAN","EM algorithm","ML estimation","WiFi indoor positioning","censored Gaussian data classification","clipped data","convergence properties","expectation maximization algorithm","fingerprinting method","maximum likelihood estimation","optimal classification","parameters estimation","portable devices sensitivity","signal strength measurements","wireless LAN positioning systems","Convergence","IEEE 802.11 Standards","Maximum likelihood estimation","Parameter estimation","Position measurement","Training","Indoor positioning","censored data","expectation maximization","signal strength","wireless LAN"],"language":[{"iso":"eng"}],"_id":"11816","user_id":"44006","department":[{"_id":"54"}],"abstract":[{"text":"In this paper, we consider the Maximum Likelihood (ML) estimation of the parameters of a GAUSSIAN in the presence of censored, i.e., clipped data. We show that the resulting Expectation Maximization (EM) algorithm delivers virtually biasfree and efficient estimates, and we discuss its convergence properties. We also discuss optimal classification in the presence of censored data. Censored data are frequently encountered in wireless LAN positioning systems based on the fingerprinting method employing signal strength measurements, due to the limited sensitivity of the portable devices. Experiments both on simulated and real-world data demonstrate the effectiveness of the proposed algorithms.","lang":"eng"}],"status":"public","type":"conference","publication":"38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)"},{"department":[{"_id":"151"}],"user_id":"55222","_id":"9576","language":[{"iso":"eng"}],"keyword":["biomedical measurement","brain","cancer","neurophysiology","phantoms","phase locked loops","piezoelectric actuators","surgery","tactile sensors","transfer functions","tumours","PLL","biomedical tissue differentiation system","brain tumor resection","frequency control","frequency shift","gel-phantom","high sensitivity actuator-sensor system","neurosurgery","phase-locked loop","piezoelectric actuators","piezoelectric bimorph","self-oscillating circuit","sensor sensitivity","tactile differentiation","tactile sensor system","transfer function","tumor boundary","visual differentiation","Biomedical measurements","Circuits","Frequency control","Neoplasms","Neurosurgery","Phase locked loops","Piezoelectric actuators","Surges","Transfer functions","Voltage"],"publication":"Frequency Control Symposium, 2008 IEEE International","type":"conference","status":"public","abstract":[{"text":"In neurosurgery, delineation of tumor boundaries during resection of brain tumors is of substantial relevance. During operation distinction between tumor and healthy tissue rely on the abilities of the surgeon based on visual and tactile differentiation. In this paper a high sensitivity actuator-sensor system using a piezoelectric bimorph is presented. Frequency shift and transfer function of the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity is evaluated using two frequency controls strategies: A phase-locked loop (PLL) and a self-oscillating circuit. Results of measurements conducted on gel-phantoms are presented and discussed.","lang":"eng"}],"author":[{"first_name":"David Oliva","last_name":"Uribe","full_name":"Uribe, David Oliva"},{"first_name":"Ralf","full_name":"Stroop, Ralf","last_name":"Stroop"},{"first_name":"Tobias","id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel"},{"last_name":"Wallaschek","full_name":"Wallaschek, Jörg","first_name":"Jörg"}],"date_created":"2019-04-29T13:07:39Z","date_updated":"2022-01-06T07:04:16Z","doi":"10.1109/FREQ.2008.4622963","title":"Development of a biomedical tissue differentiation system using piezoelectric actuators","quality_controlled":"1","publication_identifier":{"issn":["1075-6787"]},"page":"91-94","citation":{"chicago":"Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.” In <i>Frequency Control Symposium, 2008 IEEE International</i>, 91–94, 2008. <a href=\"https://doi.org/10.1109/FREQ.2008.4622963\">https://doi.org/10.1109/FREQ.2008.4622963</a>.","ieee":"D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical tissue differentiation system using piezoelectric actuators,” in <i>Frequency Control Symposium, 2008 IEEE International</i>, 2008, pp. 91–94.","ama":"Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue differentiation system using piezoelectric actuators. In: <i>Frequency Control Symposium, 2008 IEEE International</i>. ; 2008:91-94. doi:<a href=\"https://doi.org/10.1109/FREQ.2008.4622963\">10.1109/FREQ.2008.4622963</a>","bibtex":"@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development of a biomedical tissue differentiation system using piezoelectric actuators}, DOI={<a href=\"https://doi.org/10.1109/FREQ.2008.4622963\">10.1109/FREQ.2008.4622963</a>}, booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe, David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008}, pages={91–94} }","mla":"Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.” <i>Frequency Control Symposium, 2008 IEEE International</i>, 2008, pp. 91–94, doi:<a href=\"https://doi.org/10.1109/FREQ.2008.4622963\">10.1109/FREQ.2008.4622963</a>.","short":"D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium, 2008 IEEE International, 2008, pp. 91–94.","apa":"Uribe, D. O., Stroop, R., Hemsel, T., &#38; Wallaschek, J. (2008). Development of a biomedical tissue differentiation system using piezoelectric actuators. In <i>Frequency Control Symposium, 2008 IEEE International</i> (pp. 91–94). <a href=\"https://doi.org/10.1109/FREQ.2008.4622963\">https://doi.org/10.1109/FREQ.2008.4622963</a>"},"year":"2008"},{"type":"journal_article","status":"public","_id":"6093","department":[{"_id":"424"}],"user_id":"42165","extern":"1","publication_identifier":{"issn":["0340-0727"]},"publication_status":"published","intvolume":"        71","page":"626 - 633","citation":{"bibtex":"@article{Neumann_Scharlau_2007, title={Visual attention and the mechanism of metacontrast.}, volume={71}, number={6}, journal={Psychological Research}, author={Neumann, Odmar and Scharlau, Ingrid}, year={2007}, pages={626–633} }","mla":"Neumann, Odmar, and Ingrid Scharlau. “Visual Attention and the Mechanism of Metacontrast.” <i>Psychological Research</i>, vol. 71, no. 6, 2007, pp. 626–33.","short":"O. Neumann, I. Scharlau, Psychological Research 71 (2007) 626–633.","apa":"Neumann, O., &#38; Scharlau, I. (2007). Visual attention and the mechanism of metacontrast. <i>Psychological Research</i>, <i>71</i>(6), 626–633.","ama":"Neumann O, Scharlau I. Visual attention and the mechanism of metacontrast. <i>Psychological Research</i>. 2007;71(6):626-633.","ieee":"O. Neumann and I. Scharlau, “Visual attention and the mechanism of metacontrast.,” <i>Psychological Research</i>, vol. 71, no. 6, pp. 626–633, 2007.","chicago":"Neumann, Odmar, and Ingrid Scharlau. “Visual Attention and the Mechanism of Metacontrast.” <i>Psychological Research</i> 71, no. 6 (2007): 626–33."},"date_updated":"2022-06-07T00:20:12Z","oa":"1","volume":71,"author":[{"first_name":"Odmar","full_name":"Neumann, Odmar","last_name":"Neumann"},{"last_name":"Scharlau","orcid":"0000-0003-2364-9489","full_name":"Scharlau, Ingrid","id":"451","first_name":"Ingrid"}],"main_file_link":[{"open_access":"1","url":"https://kw.uni-paderborn.de/fileadmin/fakultaet/Institute/psychologie/Kognitive_Psychologie/Publikationen/NeumannScharlau2006VisualAttentionandMetscontrast.pdf"}],"publication":"Psychological Research","abstract":[{"text":"The U-shaped metacontrast function may result from the superimposition of two monotonic components which reflect the effects of mechanisms similar to the peripheral and central processes suggested for backward pattern masking by Turvey (Psychol Rev 80:1-52, 1973). In an experiment using the disc-ring paradigm, it was demonstrated that the decreasing and increasing branches of the metacontrast function are differently affected by the exposure duration of the mask and a task-irrelevant stimulus (distractor) appearing in the contralateral visual hemifield. The phenomenal representation of masking is different for the two parts of the curve. It is suggested that masking in the second part of the masking function, but not in the first, is related to the control of visual attention. (PsycINFO Database Record (c) 2016 APA, all rights reserved)","lang":"eng"}],"keyword":["visual attention","metacontrast","backward pattern masking","monotonic components superimposition","Attention","Contrast Sensitivity","Humans","Judgment","Perceptual Masking","Visual Perception","Metacognition","Visual Contrast","Visual Attention","Visual Masking"],"language":[{"iso":"eng"}],"issue":"6","year":"2007","date_created":"2018-12-10T07:08:43Z","title":"Visual attention and the mechanism of metacontrast."},{"date_created":"2019-04-15T10:14:18Z","publisher":"Kluwer Academic Publishers","title":"Localization in Nonlinear Mistuned Systems with Cyclic Symmetry","issue":"1-3","year":"2001","language":[{"iso":"eng"}],"keyword":["bladed disk assembly","mistuning","sensitivity","localization"],"publication":"Nonlinear Dynamics","abstract":[{"lang":"eng","text":"In forced systems with cyclic symmetry localization can occur due toparameter uncertainties. Often, Monte-Carlo simulations are used to findregions, where the system response is sensitive to parameteruncertainties. These simulations require a large computation time.Therefore, an approximate method to calculate the envelopes of thefrequency response functions is developed in this paper. An example of anonlinear system with cyclic symmetry is a bladed disk assembly withfriction dampers. Friction dampers can be installed underneath the bladeplatforms of turbine blades. Due to dry friction and the relative motionbetween blades and dampers, energy is dissipated, which results in areduction of blade vibration amplitudes. By optimizing the mass of thefriction dampers, the best damping effects are obtained, which lead toan increase in the reliability of the turbine. In this paper, thecalculated response of a mistuned bladed disk assembly with frictiondampers is discussed. An approximate method is developed to calculatethe envelopes of the corresponding frequency response function forstatistically varying eigenfrequencies of the blades. Regions wherelocalization can occur with a high probability, are calculated by thismethod."}],"volume":25,"author":[{"full_name":"Sextro, Walter","id":"21220","last_name":"Sextro","first_name":"Walter"},{"last_name":"Popp","full_name":"Popp, Karl","first_name":"Karl"},{"first_name":"Tomasz","last_name":"Krzyzynski","full_name":"Krzyzynski, Tomasz"}],"date_updated":"2022-01-06T07:04:05Z","doi":"10.1023/A:1012915002568","publication_identifier":{"issn":["0924-090X"]},"intvolume":"        25","page":"207-220","citation":{"ieee":"W. Sextro, K. Popp, and T. Krzyzynski, “Localization in Nonlinear Mistuned Systems with Cyclic Symmetry,” <i>Nonlinear Dynamics</i>, vol. 25, no. 1–3, pp. 207–220, 2001.","chicago":"Sextro, Walter, Karl Popp, and Tomasz Krzyzynski. “Localization in Nonlinear Mistuned Systems with Cyclic Symmetry.” <i>Nonlinear Dynamics</i> 25, no. 1–3 (2001): 207–20. <a href=\"https://doi.org/10.1023/A:1012915002568\">https://doi.org/10.1023/A:1012915002568</a>.","ama":"Sextro W, Popp K, Krzyzynski T. Localization in Nonlinear Mistuned Systems with Cyclic Symmetry. <i>Nonlinear Dynamics</i>. 2001;25(1-3):207-220. doi:<a href=\"https://doi.org/10.1023/A:1012915002568\">10.1023/A:1012915002568</a>","apa":"Sextro, W., Popp, K., &#38; Krzyzynski, T. (2001). Localization in Nonlinear Mistuned Systems with Cyclic Symmetry. <i>Nonlinear Dynamics</i>, <i>25</i>(1–3), 207–220. <a href=\"https://doi.org/10.1023/A:1012915002568\">https://doi.org/10.1023/A:1012915002568</a>","bibtex":"@article{Sextro_Popp_Krzyzynski_2001, title={Localization in Nonlinear Mistuned Systems with Cyclic Symmetry}, volume={25}, DOI={<a href=\"https://doi.org/10.1023/A:1012915002568\">10.1023/A:1012915002568</a>}, number={1–3}, journal={Nonlinear Dynamics}, publisher={Kluwer Academic Publishers}, author={Sextro, Walter and Popp, Karl and Krzyzynski, Tomasz}, year={2001}, pages={207–220} }","short":"W. Sextro, K. Popp, T. Krzyzynski, Nonlinear Dynamics 25 (2001) 207–220.","mla":"Sextro, Walter, et al. “Localization in Nonlinear Mistuned Systems with Cyclic Symmetry.” <i>Nonlinear Dynamics</i>, vol. 25, no. 1–3, Kluwer Academic Publishers, 2001, pp. 207–20, doi:<a href=\"https://doi.org/10.1023/A:1012915002568\">10.1023/A:1012915002568</a>."},"department":[{"_id":"151"}],"user_id":"55222","_id":"8924","type":"journal_article","status":"public"}]