[{"year":"2025","publisher":"FEUP","date_created":"2025-09-08T11:52:45Z","title":"LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION","publication":"Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)","abstract":[{"text":"The use of continuous fiber-reinforced thermoplastics (FRTP) in automotive industry increases due to their excellent material properties and possibility of rapid processing. The scale spanning heterogeneity of their material structure and its influence on the material behavior, however, presents significant challenges for most joining technologies, such as self-piercing riveting (SPR). During mechanical joining, the material structure is significantly altered within and around the joining zone, heavily influencing the material behavior. A comprehensive understanding of the underlying phenomena of material alteration during the SPR process is essential as basis for validating numerical simulations. This study examines the material structure at ten stages of a step-setting test of SPR with two FRTP sheets with glass-fiber reinforcement. Utilizing X-ray computed tomography (CT), the damage phenomena within different areas of the setting test are analyzed three-dimensionally and key parameters are quantified. Dominating phenomena during the penetration of the rivet into the laminate are fiber failure (FF), interfiber failure (IFF) and fiber bending, while delamination, fiber kinking and roving splitting are also observed. At the final stages, the bottom layers of the second sheet collapse and form a bulge into the cavity of the die.","lang":"eng"}],"keyword":["self-piercing riveting","computed tomography","thermoplastic composites","process-structure-interaction"],"language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"isbn":["9789727523238"]},"place":"Porto","citation":{"chicago":"Dargel, Alrik, Benjamin Gröger, Malte Christian Schlichter, Johannes Gerritzen, Daniel Köhler, Gerson Meschut, Maik Gude, and Robert Kupfer. “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.” In <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>, edited by J.F. Silva Gomes and Shaker A. Meguid. Porto: FEUP, 2025. <a href=\"https://doi.org/10.24840/978-972-752-323-8\">https://doi.org/10.24840/978-972-752-323-8</a>.","ieee":"A. Dargel <i>et al.</i>, “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION,” in <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>, Porto, 2025, doi: <a href=\"https://doi.org/10.24840/978-972-752-323-8\">10.24840/978-972-752-323-8</a>.","apa":"Dargel, A., Gröger, B., Schlichter, M. C., Gerritzen, J., Köhler, D., Meschut, G., Gude, M., &#38; Kupfer, R. (2025). LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION. In J. F. S. Gomes &#38; S. A. Meguid (Eds.), <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>. FEUP. <a href=\"https://doi.org/10.24840/978-972-752-323-8\">https://doi.org/10.24840/978-972-752-323-8</a>","ama":"Dargel A, Gröger B, Schlichter MC, et al. LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION. In: Gomes JFS, Meguid SA, eds. <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>. FEUP; 2025. doi:<a href=\"https://doi.org/10.24840/978-972-752-323-8\">10.24840/978-972-752-323-8</a>","mla":"Dargel, Alrik, et al. “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.” <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>, edited by J.F. Silva Gomes and Shaker A. Meguid, FEUP, 2025, doi:<a href=\"https://doi.org/10.24840/978-972-752-323-8\">10.24840/978-972-752-323-8</a>.","short":"A. Dargel, B. Gröger, M.C. Schlichter, J. Gerritzen, D. Köhler, G. Meschut, M. Gude, R. Kupfer, in: J.F.S. Gomes, S.A. Meguid (Eds.), Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025), FEUP, Porto, 2025.","bibtex":"@inproceedings{Dargel_Gröger_Schlichter_Gerritzen_Köhler_Meschut_Gude_Kupfer_2025, place={Porto}, title={LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION}, DOI={<a href=\"https://doi.org/10.24840/978-972-752-323-8\">10.24840/978-972-752-323-8</a>}, booktitle={Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)}, publisher={FEUP}, author={Dargel, Alrik and Gröger, Benjamin and Schlichter, Malte Christian and Gerritzen, Johannes and Köhler, Daniel and Meschut, Gerson and Gude, Maik and Kupfer, Robert}, editor={Gomes, J.F. Silva and Meguid, Shaker A.}, year={2025} }"},"oa":"1","date_updated":"2026-02-27T06:45:17Z","author":[{"full_name":"Dargel, Alrik","id":"114764","last_name":"Dargel","first_name":"Alrik"},{"full_name":"Gröger, Benjamin","last_name":"Gröger","first_name":"Benjamin"},{"first_name":"Malte Christian","id":"61977","full_name":"Schlichter, Malte Christian","last_name":"Schlichter"},{"first_name":"Johannes","id":"105344","full_name":"Gerritzen, Johannes","last_name":"Gerritzen","orcid":"0000-0002-0169-8602"},{"first_name":"Daniel","last_name":"Köhler","id":"83408","full_name":"Köhler, Daniel"},{"first_name":"Gerson","full_name":"Meschut, Gerson","id":"32056","last_name":"Meschut","orcid":"0000-0002-2763-1246"},{"first_name":"Maik","full_name":"Gude, Maik","last_name":"Gude"},{"first_name":"Robert","last_name":"Kupfer","full_name":"Kupfer, Robert"}],"main_file_link":[{"open_access":"1","url":"https://www.researchgate.net/publication/395593556_LOCAL_DEFORMATION_AND_FAILURE_OF_COMPOSITES_DURING_SELF-PIERCING_RIVETING_A_CT_BASED_MICROSTRUCTURE_INVESTIGATION"}],"conference":{"start_date":"2025-07-15","name":"8th International Conference on Integrity-Reliability-Failure (IRF2025)","location":"Porto","end_date":"2025-07-18"},"doi":"10.24840/978-972-752-323-8","type":"conference","editor":[{"first_name":"J.F. Silva","last_name":"Gomes","full_name":"Gomes, J.F. Silva"},{"last_name":"Meguid","full_name":"Meguid, Shaker A.","first_name":"Shaker A."}],"status":"public","project":[{"_id":"133","name":"TRR 285 - Project Area C"},{"_id":"148","name":"TRR 285 - Subproject C04"},{"name":"TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten","_id":"130"},{"name":"TRR 285 - Project Area A","_id":"131"},{"name":"TRR 285 - Subproject A03","_id":"137"},{"name":"TRR 285 - Subproject A01","_id":"135"}],"_id":"61149","user_id":"105344"},{"user_id":"47857","_id":"54513","language":[{"iso":"eng"}],"keyword":["Annotation","Corpus","Argumentative Structure"],"type":"conference","status":"public","abstract":[{"text":"Learning argumentative writing is challenging. Besides writing fundamentals such as syntax and grammar, learners must select and arrange argument components meaningfully to create high-quality essays. To support argumentative writing computationally, one step is to mine the argumentative structure. When combined with automatic essay scoring, interactions of the argumentative structure and quality scores can be exploited for comprehensive writing support. Although studies have shown the usefulness of using information about the argumentative structure for essay scoring, no argument mining corpus with ground-truth essay quality annotations has been published yet. Moreover, none of the existing corpora contain essays written by school students specifically. To fill this research gap, we present a German corpus of 1,320 essays from school students of two age groups. Each essay has been manually annotated for argumentative structure and quality on multiple levels of granularity. We propose baseline approaches to argument mining and essay scoring, and we analyze interactions between both tasks, thereby laying the ground for quality-oriented argumentative writing support.","lang":"eng"}],"date_created":"2024-05-29T12:11:43Z","author":[{"last_name":"Stahl","full_name":"Stahl, Maja","first_name":"Maja"},{"id":"47857","full_name":"Michel, Nadine","last_name":"Michel","first_name":"Nadine"},{"last_name":"Kilsbach","full_name":"Kilsbach, Sebastian","first_name":"Sebastian"},{"last_name":"Schmidtke","full_name":"Schmidtke, Julian ","first_name":"Julian "},{"first_name":"Sara","last_name":"Rezat","full_name":"Rezat, Sara"},{"last_name":"Wachsmuth","full_name":"Wachsmuth, Henning","first_name":"Henning"}],"date_updated":"2024-05-29T12:18:44Z","doi":"10.48550/arXiv.2404.02529","title":"A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality","citation":{"ama":"Stahl M, Michel N, Kilsbach S, Schmidtke J, Rezat S, Wachsmuth H. A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality. In: ; 2024. doi:<a href=\"https://doi.org/10.48550/arXiv.2404.02529\">10.48550/arXiv.2404.02529</a>","chicago":"Stahl, Maja, Nadine Michel, Sebastian Kilsbach, Julian  Schmidtke, Sara Rezat, and Henning Wachsmuth. “A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality,” 2024. <a href=\"https://doi.org/10.48550/arXiv.2404.02529\">https://doi.org/10.48550/arXiv.2404.02529</a>.","ieee":"M. Stahl, N. Michel, S. Kilsbach, J. Schmidtke, S. Rezat, and H. Wachsmuth, “A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality,” 2024, doi: <a href=\"https://doi.org/10.48550/arXiv.2404.02529\">10.48550/arXiv.2404.02529</a>.","mla":"Stahl, Maja, et al. <i>A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality</i>. 2024, doi:<a href=\"https://doi.org/10.48550/arXiv.2404.02529\">10.48550/arXiv.2404.02529</a>.","short":"M. Stahl, N. Michel, S. Kilsbach, J. Schmidtke, S. Rezat, H. Wachsmuth, in: 2024.","bibtex":"@inproceedings{Stahl_Michel_Kilsbach_Schmidtke_Rezat_Wachsmuth_2024, title={A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality}, DOI={<a href=\"https://doi.org/10.48550/arXiv.2404.02529\">10.48550/arXiv.2404.02529</a>}, author={Stahl, Maja and Michel, Nadine and Kilsbach, Sebastian and Schmidtke, Julian  and Rezat, Sara and Wachsmuth, Henning}, year={2024} }","apa":"Stahl, M., Michel, N., Kilsbach, S., Schmidtke, J., Rezat, S., &#38; Wachsmuth, H. (2024). <i>A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure and Quality</i>. <a href=\"https://doi.org/10.48550/arXiv.2404.02529\">https://doi.org/10.48550/arXiv.2404.02529</a>"},"year":"2024"},{"date_created":"2023-08-22T13:26:37Z","publisher":"Elsevier BV","title":"Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames","year":"2023","language":[{"iso":"eng"}],"keyword":["Nanoparticle synthesis","Flame spray pyrolysis","SpraySyn burner","Flame structure","Species distribution","Temperature distribution"],"publication":"Applications in Energy and Combustion Science","volume":15,"author":[{"first_name":"Munko","id":"94996","full_name":"Gonchikzhapov, Munko","orcid":"https://orcid.org/0000-0002-7773-047X","last_name":"Gonchikzhapov"},{"last_name":"Kasper","orcid":"0000-0003-3993-5316 ","full_name":"Kasper, Tina","id":"94562","first_name":"Tina"}],"oa":"1","date_updated":"2023-08-24T08:55:26Z","doi":"10.1016/j.jaecs.2023.100174","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S2666352X23000638"}],"publication_identifier":{"issn":["2666-352X"]},"publication_status":"published","intvolume":"        15","citation":{"apa":"Gonchikzhapov, M., &#38; Kasper, T. (2023). Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames. <i>Applications in Energy and Combustion Science</i>, <i>15</i>, Article 100174. <a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">https://doi.org/10.1016/j.jaecs.2023.100174</a>","mla":"Gonchikzhapov, Munko, and Tina Kasper. “Thermal and Chemical Structure of Ethanol and 2-Ethylhexanoic Acid/Ethanol SpraySyn Flames.” <i>Applications in Energy and Combustion Science</i>, vol. 15, 100174, Elsevier BV, 2023, doi:<a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">10.1016/j.jaecs.2023.100174</a>.","short":"M. Gonchikzhapov, T. Kasper, Applications in Energy and Combustion Science 15 (2023).","bibtex":"@article{Gonchikzhapov_Kasper_2023, title={Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames}, volume={15}, DOI={<a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">10.1016/j.jaecs.2023.100174</a>}, number={100174}, journal={Applications in Energy and Combustion Science}, publisher={Elsevier BV}, author={Gonchikzhapov, Munko and Kasper, Tina}, year={2023} }","ieee":"M. Gonchikzhapov and T. Kasper, “Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames,” <i>Applications in Energy and Combustion Science</i>, vol. 15, Art. no. 100174, 2023, doi: <a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">10.1016/j.jaecs.2023.100174</a>.","chicago":"Gonchikzhapov, Munko, and Tina Kasper. “Thermal and Chemical Structure of Ethanol and 2-Ethylhexanoic Acid/Ethanol SpraySyn Flames.” <i>Applications in Energy and Combustion Science</i> 15 (2023). <a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">https://doi.org/10.1016/j.jaecs.2023.100174</a>.","ama":"Gonchikzhapov M, Kasper T. Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames. <i>Applications in Energy and Combustion Science</i>. 2023;15. doi:<a href=\"https://doi.org/10.1016/j.jaecs.2023.100174\">10.1016/j.jaecs.2023.100174</a>"},"department":[{"_id":"43"}],"user_id":"94996","_id":"46637","article_number":"100174","type":"journal_article","status":"public"},{"publication":"28th Annual European Symposium on Algorithms (ESA 2020)","abstract":[{"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.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["Mincut","Sensitivity","Data Structure"],"year":"2020","date_created":"2020-10-21T12:00:20Z","publisher":"Schloss Dagstuhl -- Leibniz-Zentrum für Informatik","title":"Mincut Sensitivity Data Structures for the Insertion of an Edge","type":"conference","status":"public","editor":[{"full_name":"Grandoni, Fabrizio","last_name":"Grandoni","first_name":"Fabrizio"},{"full_name":"Herman, Grzegorz","last_name":"Herman","first_name":"Grzegorz"},{"full_name":"Sanders, Peter","last_name":"Sanders","first_name":"Peter"}],"department":[{"_id":"63"}],"series_title":"Leibniz International Proceedings in Informatics (LIPIcs)","user_id":"39241","_id":"20159","publication_identifier":{"issn":["1868-8969"],"isbn":["978-3-95977-162-7"]},"intvolume":"       173","page":"12:1-12:14","citation":{"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>","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>.","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)} }","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.","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>.","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>"},"place":"Dagstuhl, Germany","volume":173,"author":[{"full_name":"Baswana, Surender","last_name":"Baswana","first_name":"Surender"},{"full_name":"Gupta, Shiv","last_name":"Gupta","first_name":"Shiv"},{"first_name":"Till","orcid":"0000-0003-2014-4696","last_name":"Knollmann","id":"39241","full_name":"Knollmann, Till"}],"date_updated":"2022-01-06T06:54:20Z","doi":"10.4230/LIPIcs.ESA.2020.12"},{"user_id":"100715","_id":"64018","extern":"1","language":[{"iso":"eng"}],"keyword":["Solid state NMR","“Surfactant-free” platinum nanoparticles","CO oxidation","Particle size effect","Structure sensitivity"],"publication":"Journal of Catalysis","type":"journal_article","status":"public","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"}],"volume":377,"author":[{"first_name":"Sarah","last_name":"Neumann","full_name":"Neumann, Sarah"},{"first_name":"Torsten","last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten"},{"first_name":"Gerd","full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky"},{"last_name":"Paul","full_name":"Paul, Stephen","first_name":"Stephen"},{"full_name":"Thiele, Greg","last_name":"Thiele","first_name":"Greg"},{"full_name":"Sievers, Heiko","last_name":"Sievers","first_name":"Heiko"},{"first_name":"Marcus","last_name":"Bäumer","full_name":"Bäumer, Marcus"},{"first_name":"Sebastian","last_name":"Kunz","full_name":"Kunz, Sebastian"}],"date_created":"2026-02-07T16:02:06Z","date_updated":"2026-02-17T16:14:45Z","doi":"10.1016/j.jcat.2019.07.049","title":"Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts","page":"662–672","intvolume":"       377","citation":{"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} }","short":"S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M. Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 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>"},"year":"2019"},{"type":"journal_article","status":"public","_id":"2331","project":[{"name":"SFB 901","_id":"1"},{"name":"SFB 901 - Project Area B","_id":"3"},{"name":"SFB 901 - Subproject B1","_id":"9"}],"department":[{"_id":"36"},{"_id":"1"},{"_id":"579"}],"user_id":"477","article_type":"original","file_date_updated":"2018-11-02T15:16:29Z","publication_identifier":{"issn":["2005-4238"],"eissn":["2207-6360"]},"has_accepted_license":"1","publication_status":"published","intvolume":"       112","page":"123-136","citation":{"ieee":"Y. Kim, S. Lee, M. Dollmann, and M. Geierhos, “Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure,” <i>International Journal of Advanced Science and Technology</i>, vol. 112, pp. 123–136, 2018.","chicago":"Kim, Yeongsu , Seungwoo Lee, Markus Dollmann, and Michaela Geierhos. “Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure.” <i>International Journal of Advanced Science and Technology</i> 112 (2018): 123–36. <a href=\"https://doi.org/10.14257/ijast.2018.112.12\">https://doi.org/10.14257/ijast.2018.112.12</a>.","ama":"Kim Y, Lee S, Dollmann M, Geierhos M. Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure. <i>International Journal of Advanced Science and Technology</i>. 2018;112:123-136. doi:<a href=\"https://doi.org/10.14257/ijast.2018.112.12\">10.14257/ijast.2018.112.12</a>","apa":"Kim, Y., Lee, S., Dollmann, M., &#38; Geierhos, M. (2018). Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure. <i>International Journal of Advanced Science and Technology</i>, <i>112</i>, 123–136. <a href=\"https://doi.org/10.14257/ijast.2018.112.12\">https://doi.org/10.14257/ijast.2018.112.12</a>","bibtex":"@article{Kim_Lee_Dollmann_Geierhos_2018, title={Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure}, volume={112}, DOI={<a href=\"https://doi.org/10.14257/ijast.2018.112.12\">10.14257/ijast.2018.112.12</a>}, journal={International Journal of Advanced Science and Technology}, publisher={SERSC Australia}, author={Kim, Yeongsu  and Lee, Seungwoo and Dollmann, Markus and Geierhos, Michaela}, year={2018}, pages={123–136} }","mla":"Kim, Yeongsu, et al. “Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure.” <i>International Journal of Advanced Science and Technology</i>, vol. 112, SERSC Australia, 2018, pp. 123–36, doi:<a href=\"https://doi.org/10.14257/ijast.2018.112.12\">10.14257/ijast.2018.112.12</a>.","short":"Y. Kim, S. Lee, M. Dollmann, M. Geierhos, International Journal of Advanced Science and Technology 112 (2018) 123–136."},"date_updated":"2022-01-06T06:55:49Z","volume":112,"author":[{"last_name":"Kim","full_name":"Kim, Yeongsu ","first_name":"Yeongsu "},{"first_name":"Seungwoo","full_name":"Lee, Seungwoo","last_name":"Lee"},{"last_name":"Dollmann","full_name":"Dollmann, Markus","id":"27578","first_name":"Markus"},{"first_name":"Michaela","id":"42496","full_name":"Geierhos, Michaela","last_name":"Geierhos","orcid":"0000-0002-8180-5606"}],"doi":"10.14257/ijast.2018.112.12","publication":"International Journal of Advanced Science and Technology","abstract":[{"lang":"eng","text":"A user generally writes software requirements in ambiguous and incomplete form by using natural language; therefore, a software developer may have difficulty in clearly understanding what the meanings are. To solve this problem with automation, we propose a classifier for semantic annotation with manually pre-defined semantic categories. To improve our classifier, we carefully designed syntactic features extracted by constituency and dependency parsers. Even with a small dataset and a large number of classes, our proposed classifier records an accuracy of 0.75, which outperforms the previous model, REaCT."}],"file":[{"file_id":"5297","file_name":"12.pdf","access_level":"closed","file_size":586968,"date_created":"2018-11-02T15:16:29Z","creator":"ups","date_updated":"2018-11-02T15:16:29Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"keyword":["Software Engineering","Natural Language Processing","Semantic Annotation","Machine Learning","Feature Engineering","Syntactic Structure"],"ddc":["000"],"language":[{"iso":"eng"}],"quality_controlled":"1","year":"2018","publisher":"SERSC Australia","date_created":"2018-04-13T09:19:22Z","title":"Improving Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure"},{"intvolume":"     11201","citation":{"short":"T. Knollmann, C. Scheideler, in: T. Izumi, P. Kuznetsov (Eds.), Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), Springer, Cham, 2018.","mla":"Knollmann, Till, and Christian Scheideler. “A Self-Stabilizing Hashed Patricia Trie.” <i>Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)</i>, edited by Taisuke Izumi and Petr Kuznetsov, vol. 11201, Springer, Cham, 2018, doi:<a href=\"https://doi.org/10.1007/978-3-030-03232-6_1\">10.1007/978-3-030-03232-6_1</a>.","bibtex":"@inproceedings{Knollmann_Scheideler_2018, series={Lecture Notes of Computer Science}, title={A Self-Stabilizing Hashed Patricia Trie}, volume={11201}, DOI={<a href=\"https://doi.org/10.1007/978-3-030-03232-6_1\">10.1007/978-3-030-03232-6_1</a>}, booktitle={Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)}, publisher={Springer, Cham}, author={Knollmann, Till and Scheideler, Christian}, editor={Izumi, Taisuke and Kuznetsov, PetrEditors}, year={2018}, collection={Lecture Notes of Computer Science} }","apa":"Knollmann, T., &#38; Scheideler, C. (2018). A Self-Stabilizing Hashed Patricia Trie. In T. Izumi &#38; P. Kuznetsov (Eds.), <i>Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)</i> (Vol. 11201). Tokyo: Springer, Cham. <a href=\"https://doi.org/10.1007/978-3-030-03232-6_1\">https://doi.org/10.1007/978-3-030-03232-6_1</a>","ama":"Knollmann T, Scheideler C. A Self-Stabilizing Hashed Patricia Trie. In: Izumi T, Kuznetsov P, eds. <i>Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)</i>. Vol 11201. Lecture Notes of Computer Science. Springer, Cham; 2018. doi:<a href=\"https://doi.org/10.1007/978-3-030-03232-6_1\">10.1007/978-3-030-03232-6_1</a>","chicago":"Knollmann, Till, and Christian Scheideler. “A Self-Stabilizing Hashed Patricia Trie.” In <i>Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)</i>, edited by Taisuke Izumi and Petr Kuznetsov, Vol. 11201. Lecture Notes of Computer Science. Springer, Cham, 2018. <a href=\"https://doi.org/10.1007/978-3-030-03232-6_1\">https://doi.org/10.1007/978-3-030-03232-6_1</a>.","ieee":"T. Knollmann and C. Scheideler, “A Self-Stabilizing Hashed Patricia Trie,” in <i>Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)</i>, Tokyo, 2018, vol. 11201."},"has_accepted_license":"1","doi":"10.1007/978-3-030-03232-6_1","conference":{"start_date":"2018-11-04","name":"20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)","location":"Tokyo","end_date":"2018-11-07"},"volume":11201,"author":[{"first_name":"Till","id":"39241","full_name":"Knollmann, Till","orcid":"0000-0003-2014-4696","last_name":"Knollmann"},{"last_name":"Scheideler","id":"20792","full_name":"Scheideler, Christian","first_name":"Christian"}],"date_updated":"2022-01-06T07:01:02Z","status":"public","editor":[{"last_name":"Izumi","full_name":"Izumi, Taisuke","first_name":"Taisuke"},{"last_name":"Kuznetsov","full_name":"Kuznetsov, Petr","first_name":"Petr"}],"type":"conference","file_date_updated":"2018-11-02T14:38:37Z","department":[{"_id":"63"},{"_id":"79"}],"user_id":"39241","series_title":"Lecture Notes of Computer Science","_id":"4411","project":[{"name":"SFB 901","_id":"1"},{"_id":"2","name":"SFB 901 - Project Area A"},{"name":"SFB 901 - Subproject A1","_id":"5"}],"year":"2018","title":"A Self-Stabilizing Hashed Patricia Trie","date_created":"2018-09-17T13:12:18Z","publisher":"Springer, Cham","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","access_level":"closed","file_name":"ASelf-stabilizingHashedPatrici.pdf","file_id":"5277","file_size":500005,"creator":"ups","date_created":"2018-11-02T14:38:37Z","date_updated":"2018-11-02T14:38:37Z"}],"abstract":[{"lang":"eng","text":"While a lot of research in distributed computing has covered solutions for self-stabilizing computing and topologies, there is far less work on self-stabilization for distributed data structures.\r\nConsidering crashing peers in peer-to-peer networks, it should not be taken for granted that a distributed data structure remains intact.\r\nIn this work, we present a self-stabilizing protocol for a distributed data structure called the hashed Patricia Trie (Kniesburges and Scheideler WALCOM'11) that enables efficient prefix search on a set of keys.\r\nThe data structure has a wide area of applications including string matching problems while offering low overhead and efficient operations when embedded on top of a distributed hash table.\r\nEspecially, longest prefix matching for $x$ can be done in $\\mathcal{O}(\\log |x|)$ hash table read accesses.\r\nWe show how to maintain the structure in a self-stabilizing way.\r\nOur protocol assures low overhead in a legal state and a total (asymptotically optimal) memory demand of $\\Theta(d)$ bits, where $d$ is the number of bits needed for storing all keys."}],"publication":"Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)","language":[{"iso":"eng"}],"keyword":["Self-Stabilizing","Prefix Search","Distributed Data Structure"],"ddc":["000"],"external_id":{"arxiv":["1809.04923"]}},{"year":"2018","citation":{"apa":"Rösener, T., Hoffmann, A., &#38; Herres-Pawlis, S. (2018). Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility. <i>European Journal of Inorganic Chemistry</i>, <i>2018</i>(27), 3164–3175. <a href=\"https://doi.org/10.1002/ejic.201800511\">https://doi.org/10.1002/ejic.201800511</a>","bibtex":"@article{Rösener_Hoffmann_Herres-Pawlis_2018, title={Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility}, volume={2018}, DOI={<a href=\"https://doi.org/10.1002/ejic.201800511\">10.1002/ejic.201800511</a>}, number={27}, journal={European Journal of Inorganic Chemistry}, author={Rösener, Thomas and Hoffmann, Alexander and Herres-Pawlis, Sonja}, year={2018}, pages={3164–3175} }","mla":"Rösener, Thomas, et al. “Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility.” <i>European Journal of Inorganic Chemistry</i>, vol. 2018, no. 27, 2018, pp. 3164–75, doi:<a href=\"https://doi.org/10.1002/ejic.201800511\">10.1002/ejic.201800511</a>.","short":"T. Rösener, A. Hoffmann, S. Herres-Pawlis, European Journal of Inorganic Chemistry 2018 (2018) 3164–3175.","ieee":"T. Rösener, A. Hoffmann, and S. Herres-Pawlis, “Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility,” <i>European Journal of Inorganic Chemistry</i>, vol. 2018, no. 27, pp. 3164–3175, 2018.","chicago":"Rösener, Thomas, Alexander Hoffmann, and Sonja Herres-Pawlis. “Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility.” <i>European Journal of Inorganic Chemistry</i> 2018, no. 27 (2018): 3164–75. <a href=\"https://doi.org/10.1002/ejic.201800511\">https://doi.org/10.1002/ejic.201800511</a>.","ama":"Rösener T, Hoffmann A, Herres-Pawlis S. Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility. <i>European Journal of Inorganic Chemistry</i>. 2018;2018(27):3164-3175. doi:<a href=\"https://doi.org/10.1002/ejic.201800511\">10.1002/ejic.201800511</a>"},"page":"3164-3175","intvolume":"      2018","issue":"27","title":"Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility","doi":"10.1002/ejic.201800511","date_updated":"2022-01-06T06:51:30Z","author":[{"first_name":"Thomas","full_name":"Rösener, Thomas","last_name":"Rösener"},{"last_name":"Hoffmann","full_name":"Hoffmann, Alexander","first_name":"Alexander"},{"first_name":"Sonja","last_name":"Herres-Pawlis","full_name":"Herres-Pawlis, Sonja"}],"date_created":"2019-09-11T11:00:06Z","volume":2018,"abstract":[{"text":"Ligands DMEG6etqu, TMG6etqu, DMEG6buqu, and TMG6buqu were developed on the basis of guanidine quinoline (GUAqu) ligands 1,3-dimethyl-N-(quinolin-8-yl)imidazolidin-2-imine (DMEGqu) and 1,1,3,3-tetramethyl-2-(quinolin-8-yl)guanidine (TMGqu). These ligands feature an alkyl substituent at the C6 of the quinoline backbone. The synthetic strategy developed here enables inexpensive syntheses of any kind of C6-substituted GUAqu ligands. On one hand, the alkylation increases the solubility of corresponding copper complexes in apolar atom transfer radical polymerization (ATRP) monomers like styrene. On the other hand, it has a significant electronic influence and thus an effect on the donor properties of the new ligands. Seven CuI and CuII complexes of DMEG6etqu and TMG6etqu have been crystallized and were studied with regard to their structural and electrochemical properties. CuI and CuII complexes of DMEG6buqu and TMG6buqu turned out to be perfectly soluble in pure styrene even at room temperature, which makes them excellent catalysts in the ATRP of apolar monomers. The key characteristics of the ATRP equilibrium, KATRP and kact, were determined for the new complexes. In addition, we used our recently developed DFT methodology, NBO analysis, and isodesmic reactions to predict the influence of the introduced alkyl substituents. It turned out that high conformational freedom in the complex structures leads to a significant uncertainty in prediction of the thermodynamic properties.","lang":"eng"}],"status":"public","type":"journal_article","publication":"European Journal of Inorganic Chemistry","keyword":["Copper","Polymerization","Redox chemistry","Structure elucidation","Ligand effects"],"language":[{"iso":"eng"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"13186","user_id":"40778"},{"date_updated":"2026-02-17T16:12:48Z","date_created":"2026-02-07T16:16:37Z","author":[{"last_name":"Wang","full_name":"Wang, Yonggui","first_name":"Yonggui"},{"first_name":"Pedro B.","last_name":"Groszewicz","full_name":"Groszewicz, Pedro B."},{"full_name":"Rosenfeldt, Sabine","last_name":"Rosenfeldt","first_name":"Sabine"},{"first_name":"Hendrik","last_name":"Schmidt","full_name":"Schmidt, Hendrik"},{"first_name":"Cynthia A.","last_name":"Volkert","full_name":"Volkert, Cynthia A."},{"full_name":"Vana, Philipp","last_name":"Vana","first_name":"Philipp"},{"first_name":"Torsten","last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten"},{"first_name":"Gerd","last_name":"Buntkowsky","full_name":"Buntkowsky, Gerd"},{"last_name":"Zhang","full_name":"Zhang, Kai","first_name":"Kai"}],"title":"Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State","doi":"10.1002/adma.201702473","year":"2017","citation":{"apa":"Wang, Y., Groszewicz, P. B., Rosenfeldt, S., Schmidt, H., Volkert, C. A., Vana, P., Gutmann, T., Buntkowsky, G., &#38; Zhang, K. (2017). Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. <i>Advanced Materials</i>, 1702473. <a href=\"https://doi.org/10.1002/adma.201702473\">https://doi.org/10.1002/adma.201702473</a>","mla":"Wang, Yonggui, et al. “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State.” <i>Advanced Materials</i>, 2017, p. 1702473, doi:<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>.","short":"Y. Wang, P.B. Groszewicz, S. Rosenfeldt, H. Schmidt, C.A. Volkert, P. Vana, T. Gutmann, G. Buntkowsky, K. Zhang, Advanced Materials (2017) 1702473.","bibtex":"@article{Wang_Groszewicz_Rosenfeldt_Schmidt_Volkert_Vana_Gutmann_Buntkowsky_Zhang_2017, title={Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State}, DOI={<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>}, journal={Advanced Materials}, author={Wang, Yonggui and Groszewicz, Pedro B. and Rosenfeldt, Sabine and Schmidt, Hendrik and Volkert, Cynthia A. and Vana, Philipp and Gutmann, Torsten and Buntkowsky, Gerd and Zhang, Kai}, year={2017}, pages={1702473} }","chicago":"Wang, Yonggui, Pedro B. Groszewicz, Sabine Rosenfeldt, Hendrik Schmidt, Cynthia A. Volkert, Philipp Vana, Torsten Gutmann, Gerd Buntkowsky, and Kai Zhang. “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State.” <i>Advanced Materials</i>, 2017, 1702473. <a href=\"https://doi.org/10.1002/adma.201702473\">https://doi.org/10.1002/adma.201702473</a>.","ieee":"Y. Wang <i>et al.</i>, “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State,” <i>Advanced Materials</i>, p. 1702473, 2017, doi: <a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>.","ama":"Wang Y, Groszewicz PB, Rosenfeldt S, et al. Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. <i>Advanced Materials</i>. Published online 2017:1702473. doi:<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>"},"page":"1702473","_id":"64057","user_id":"100715","keyword":["nanoparticles","self-assembly","cellulose","core-coronas structure","thermoreversible"],"language":[{"iso":"eng"}],"extern":"1","type":"journal_article","publication":"Advanced Materials","abstract":[{"text":"Self-assembly of nanoparticles (NPs) forming unique structures has been investigated extensively over the past few years. However, many self-assembled structures by NPs are irreversible, because they are generally constructed using their suspensions. It is still challenging for NPs to reversibly self-assemble in dry state, let alone of polymeric NPs with general sizes of hundreds of nm. Herein, this study reports a new reversible self-assembly phenomenon of NPs in dry state, forming thermoreversible strip-like supermolecular structures. These novel NPs of around 150 nm are perfluorinated surface-undecenoated cellulose nanoparticles (FSU-CNPs) with a core-coronas structure. The thermoreversible self-assembled structure is formed after drying in the air at the interface between FSU-CNP films and Teflon substrates. Remarkably, the formation and dissociation of this assembled structure are accompanied by a reversible conversion of the surface hydrophobicity, film transparency, and anisotropic properties. These findings show novel feasibility of reversible self-assembly of NPs in dry state, and thereby expand our knowledge of self-assembly phenomenon.","lang":"eng"}],"status":"public"},{"title":"How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement","publisher":"Springer","date_created":"2017-10-17T12:41:29Z","year":"2016","quality_controlled":"1","keyword":["Requirement refinement","Concept expansion","Ontology-based instantiation of predicate-argument structure"],"ddc":["040"],"language":[{"iso":"eng"}],"abstract":[{"text":"One purpose of requirement refinement is that higher-level requirements have to be translated to something usable by developers. Since customer requirements are often written in natural language by end users, they lack precision, completeness and consistency. Although user stories are often used in the requirement elicitation process in order to describe the possibilities how to interact with the software, there is always something unspoken. Here, we present techniques how to automatically refine vague software descriptions. Thus, we can bridge the gap by first revising natural language utterances from higher-level to more detailed customer requirements, before functionality matters. We therefore focus on the resolution of semantically incomplete user-generated sentences (i.e. non-instantiated arguments of predicates) and provide ontology-based gap-filling suggestions how to complete unverbalized information in the user’s demand.","lang":"eng"}],"file":[{"date_updated":"2018-03-21T12:29:37Z","creator":"florida","date_created":"2018-03-21T12:29:37Z","file_size":1499075,"file_id":"1528","access_level":"closed","file_name":"191-chp_3A10.1007_2F978-3-319-41754-7_4.pdf","content_type":"application/pdf","success":1,"relation":"main_file"}],"publication":"Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)","doi":"10.1007/978-3-319-41754-7_4","conference":{"location":"Salford, UK","end_date":"2016-06-24","start_date":"2016-06-22","name":"21st International Conference on Applications of Natural Language to Information Systems (NLDB 2016)"},"date_updated":"2022-01-06T06:53:58Z","volume":9612,"author":[{"full_name":"Geierhos, Michaela","id":"42496","orcid":"0000-0002-8180-5606","last_name":"Geierhos","first_name":"Michaela"},{"last_name":"Bäumer","full_name":"Bäumer, Frederik Simon","id":"38837","first_name":"Frederik Simon"}],"place":"Cham, Switzerland","page":"37-47","intvolume":"      9612","citation":{"bibtex":"@inproceedings{Geierhos_Bäumer_2016, place={Cham, Switzerland}, series={Lecture Notes in Computer Science}, title={How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement}, volume={9612}, DOI={<a href=\"https://doi.org/10.1007/978-3-319-41754-7_4\">10.1007/978-3-319-41754-7_4</a>}, booktitle={Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)}, publisher={Springer}, author={Geierhos, Michaela and Bäumer, Frederik Simon}, editor={Métais, Elisabeth  and Meziane, Farid  and Saraee, Mohamad  and Sugumaran, Vijayan  and Vadera, Sunil Editors}, year={2016}, pages={37–47}, collection={Lecture Notes in Computer Science} }","mla":"Geierhos, Michaela, and Frederik Simon Bäumer. “How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement.” <i>Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)</i>, edited by Elisabeth  Métais et al., vol. 9612, Springer, 2016, pp. 37–47, doi:<a href=\"https://doi.org/10.1007/978-3-319-41754-7_4\">10.1007/978-3-319-41754-7_4</a>.","short":"M. Geierhos, F.S. Bäumer, in: E. Métais, F. Meziane, M. Saraee, V. Sugumaran, S. Vadera (Eds.), Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB), Springer, Cham, Switzerland, 2016, pp. 37–47.","apa":"Geierhos, M., &#38; Bäumer, F. S. (2016). How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement. In E. Métais, F. Meziane, M. Saraee, V. Sugumaran, &#38; S. Vadera (Eds.), <i>Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)</i> (Vol. 9612, pp. 37–47). Cham, Switzerland: Springer. <a href=\"https://doi.org/10.1007/978-3-319-41754-7_4\">https://doi.org/10.1007/978-3-319-41754-7_4</a>","ama":"Geierhos M, Bäumer FS. How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement. In: Métais E, Meziane F, Saraee M, Sugumaran V, Vadera S, eds. <i>Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)</i>. Vol 9612. Lecture Notes in Computer Science. Cham, Switzerland: Springer; 2016:37-47. doi:<a href=\"https://doi.org/10.1007/978-3-319-41754-7_4\">10.1007/978-3-319-41754-7_4</a>","ieee":"M. Geierhos and F. S. Bäumer, “How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement,” in <i>Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)</i>, Salford, UK, 2016, vol. 9612, pp. 37–47.","chicago":"Geierhos, Michaela, and Frederik Simon Bäumer. “How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement.” In <i>Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)</i>, edited by Elisabeth  Métais, Farid  Meziane, Mohamad  Saraee, Vijayan  Sugumaran, and Sunil  Vadera, 9612:37–47. Lecture Notes in Computer Science. Cham, Switzerland: Springer, 2016. <a href=\"https://doi.org/10.1007/978-3-319-41754-7_4\">https://doi.org/10.1007/978-3-319-41754-7_4</a>."},"publication_identifier":{"isbn":["978-3-319-41753-0"],"eisbn":["978-3-319-41754-7"]},"has_accepted_license":"1","publication_status":"published","file_date_updated":"2018-03-21T12:29:37Z","_id":"191","project":[{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Project Area B","_id":"3"},{"_id":"9","name":"SFB 901 - Subproject B1"}],"department":[{"_id":"36"},{"_id":"1"},{"_id":"579"}],"series_title":"Lecture Notes in Computer Science","user_id":"477","editor":[{"full_name":"Métais, Elisabeth ","last_name":"Métais","first_name":"Elisabeth "},{"last_name":"Meziane","full_name":"Meziane, Farid ","first_name":"Farid "},{"full_name":"Saraee, Mohamad ","last_name":"Saraee","first_name":"Mohamad "},{"last_name":"Sugumaran","full_name":"Sugumaran, Vijayan ","first_name":"Vijayan "},{"last_name":"Vadera","full_name":"Vadera, Sunil ","first_name":"Sunil "}],"status":"public","type":"conference"},{"type":"journal_article","publication":"Tribology International","abstract":[{"lang":"eng","text":"A method for the reconstruction of turned shaft surfaces with a (fractal) Weierstrass–Mandelbrot-function (WMF) is presented. The WMF is modified to allow to freely choose a phase-shift for every frequency. The reconstruction is based on distinct profiles in axial and tangential direction and the statistical distribution of low-wavelength portions of the surface is taken into account by adding t-distributed random deviations to the surface. The work is validated by reconstructing measured shaft surfaces with different manufacturing parameters, which shows good accuracy for periodic surfaces. This method allows for a characterization of surfaces with a limited number of parameters and can be used to store the characteristics of measured surfaces with a reduced amount of data compared to a point-cloud surface."}],"status":"public","_id":"34439","user_id":"38077","department":[{"_id":"146"}],"keyword":["Roughness","Structure","Fractal","Machining"],"extern":"1","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0301-679X"]},"year":"2016","citation":{"mla":"Thielen, Stefan, et al. “Reconstruction of Three-Dimensional Turned Shaft Surfaces with Fractal Functions.” <i>Tribology International</i>, vol. 95, 2016, pp. 349–57, doi:<a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>.","short":"S. Thielen, B. Magyar, A. Piros, Tribology International 95 (2016) 349–357.","bibtex":"@article{Thielen_Magyar_Piros_2016, title={Reconstruction of three-dimensional turned shaft surfaces with fractal functions}, volume={95}, DOI={<a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>}, journal={Tribology International}, author={Thielen, Stefan and Magyar, Balázs and Piros, Attila}, year={2016}, pages={349–357} }","apa":"Thielen, S., Magyar, B., &#38; Piros, A. (2016). Reconstruction of three-dimensional turned shaft surfaces with fractal functions. <i>Tribology International</i>, <i>95</i>, 349–357. <a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>","ama":"Thielen S, Magyar B, Piros A. Reconstruction of three-dimensional turned shaft surfaces with fractal functions. <i>Tribology International</i>. 2016;95:349-357. doi:<a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>","chicago":"Thielen, Stefan, Balázs Magyar, and Attila Piros. “Reconstruction of Three-Dimensional Turned Shaft Surfaces with Fractal Functions.” <i>Tribology International</i> 95 (2016): 349–57. <a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>.","ieee":"S. Thielen, B. Magyar, and A. Piros, “Reconstruction of three-dimensional turned shaft surfaces with fractal functions,” <i>Tribology International</i>, vol. 95, pp. 349–357, 2016, doi: <a href=\"https://doi.org/10.1016/j.triboint.2015.11.028\">https://doi.org/10.1016/j.triboint.2015.11.028</a>."},"page":"349-357","intvolume":"        95","date_updated":"2022-12-15T09:56:59Z","date_created":"2022-12-15T09:56:44Z","author":[{"first_name":"Stefan","full_name":"Thielen, Stefan","last_name":"Thielen"},{"first_name":"Balázs","full_name":"Magyar, Balázs","id":"97759","last_name":"Magyar"},{"first_name":"Attila","last_name":"Piros","full_name":"Piros, Attila"}],"volume":95,"title":"Reconstruction of three-dimensional turned shaft surfaces with fractal functions","doi":"https://doi.org/10.1016/j.triboint.2015.11.028"},{"author":[{"last_name":"Hartmann-Wendels","full_name":"Hartmann-Wendels, Thomas","first_name":"Thomas"},{"first_name":"Georg","full_name":"Keienburg, Georg","last_name":"Keienburg"},{"last_name":"Sievers","id":"46447","full_name":"Sievers, Sönke","first_name":"Sönke"}],"volume":17,"date_updated":"2026-04-09T08:01:03Z","main_file_link":[{"url":"https://onlinelibrary.wiley.com/doi/full/10.1111/j.1468-036X.2010.00568.x"}],"doi":"10.1111/j.1468-036X.2010.00568.x","publication_status":"published","citation":{"chicago":"Hartmann-Wendels, Thomas, Georg Keienburg, and Sönke Sievers. “Adverse Selection, Investor Experience and Security Choice in Venture Capital Finance: Evidence from Germany.” <i>European Financial Management (VHB-JOURQUAL 4 Ranking B)</i> 17, no. 3 (2011): 464–99. <a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">https://doi.org/10.1111/j.1468-036X.2010.00568.x</a>.","ieee":"T. Hartmann-Wendels, G. Keienburg, and S. Sievers, “Adverse selection, investor experience and security choice in venture capital finance: evidence from Germany,” <i>European Financial Management (VHB-JOURQUAL 4 Ranking B)</i>, vol. 17, no. 3, pp. 464–499, 2011, doi: <a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">10.1111/j.1468-036X.2010.00568.x</a>.","ama":"Hartmann-Wendels T, Keienburg G, Sievers S. Adverse selection, investor experience and security choice in venture capital finance: evidence from Germany. <i>European Financial Management (VHB-JOURQUAL 4 Ranking B)</i>. 2011;17(3):464-499. doi:<a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">10.1111/j.1468-036X.2010.00568.x</a>","short":"T. Hartmann-Wendels, G. Keienburg, S. Sievers, European Financial Management (VHB-JOURQUAL 4 Ranking B) 17 (2011) 464–499.","bibtex":"@article{Hartmann-Wendels_Keienburg_Sievers_2011, title={Adverse selection, investor experience and security choice in venture capital finance: evidence from Germany}, volume={17}, DOI={<a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">10.1111/j.1468-036X.2010.00568.x</a>}, number={3}, journal={European Financial Management (VHB-JOURQUAL 4 Ranking B)}, publisher={Wiley Online Library}, author={Hartmann-Wendels, Thomas and Keienburg, Georg and Sievers, Sönke}, year={2011}, pages={464–499} }","mla":"Hartmann-Wendels, Thomas, et al. “Adverse Selection, Investor Experience and Security Choice in Venture Capital Finance: Evidence from Germany.” <i>European Financial Management (VHB-JOURQUAL 4 Ranking B)</i>, vol. 17, no. 3, Wiley Online Library, 2011, pp. 464–99, doi:<a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">10.1111/j.1468-036X.2010.00568.x</a>.","apa":"Hartmann-Wendels, T., Keienburg, G., &#38; Sievers, S. (2011). Adverse selection, investor experience and security choice in venture capital finance: evidence from Germany. <i>European Financial Management (VHB-JOURQUAL 4 Ranking B)</i>, <i>17</i>(3), 464–499. <a href=\"https://doi.org/10.1111/j.1468-036X.2010.00568.x\">https://doi.org/10.1111/j.1468-036X.2010.00568.x</a>"},"jel":["G24","G32"],"intvolume":"        17","page":"464-499","user_id":"115848","department":[{"_id":"275"}],"_id":"5195","extern":"1","article_type":"original","type":"journal_article","status":"public","date_created":"2018-10-31T11:39:27Z","publisher":"Wiley Online Library","title":"Adverse selection, investor experience and security choice in venture capital finance: evidence from Germany","issue":"3","quality_controlled":"1","year":"2011","language":[{"iso":"eng"}],"keyword":["venture capital","capital structure","contract theory","deal experience"],"publication":"European Financial Management (VHB-JOURQUAL 4 Ranking B)","abstract":[{"lang":"eng","text":"This article analyses 336 German venture capital transactions from 1990 to 2005 and seeks to determine why selected financial securities differ across deals. We find that a broad array of financial instruments is used, covering straight equity, mezzanine and debt‐like securities. Based on the chosen financial securities’ upside potential and downside protection characteristics, we provide an explanation for the differing use of these securities. Our results show that investors’ deal experience, adverse selection risks and economic prospects in the public equity market influence the selection of financial securities. "}]},{"issue":"7","year":"2009","date_created":"2018-09-14T13:02:19Z","title":"Consolidation in banking and financial stability in Europe: Empirical evidence","publication":"Journal of Banking & Finance","abstract":[{"text":"Using aggregate balance sheet data from banks across the EU-25 over the period from 1997 to 2005 we provide empirical evidence that national banking market concentration has a negative impact on European banks’ financial soundness as measured by the Z-score technique while controlling for macroeconomic, bank-specific, regulatory, and institutional factors. Furthermore, our analysis reveals that Eastern European banking markets exhibiting a lower level of competitive pressure, fewer diversification opportunities and a higher fraction of government-owned banks are more prone to financial fragility whereas capital regulations have supported financial stability across the entire European Union.","lang":"eng"}],"keyword":["Market structure","Financial stability","Banking regulation"],"language":[{"iso":"eng"}],"publication_status":"published","page":"1299-1311","intvolume":"        33","citation":{"ama":"Uhde A, Heimeshoff U. Consolidation in banking and financial stability in Europe: Empirical evidence. <i>Journal of Banking &#38; Finance</i>. 2009;33(7):1299-1311. doi:<a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>","ieee":"A. Uhde and U. Heimeshoff, “Consolidation in banking and financial stability in Europe: Empirical evidence,” <i>Journal of Banking &#38; Finance</i>, vol. 33, no. 7, pp. 1299–1311, 2009, doi: <a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>.","chicago":"Uhde, André, and Ulrich Heimeshoff. “Consolidation in Banking and Financial Stability in Europe: Empirical Evidence.” <i>Journal of Banking &#38; Finance</i> 33, no. 7 (2009): 1299–1311. <a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>.","bibtex":"@article{Uhde_Heimeshoff_2009, title={Consolidation in banking and financial stability in Europe: Empirical evidence}, volume={33}, DOI={<a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>}, number={7}, journal={Journal of Banking &#38; Finance}, author={Uhde, André and Heimeshoff, Ulrich}, year={2009}, pages={1299–1311} }","mla":"Uhde, André, and Ulrich Heimeshoff. “Consolidation in Banking and Financial Stability in Europe: Empirical Evidence.” <i>Journal of Banking &#38; Finance</i>, vol. 33, no. 7, 2009, pp. 1299–311, doi:<a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>.","short":"A. Uhde, U. Heimeshoff, Journal of Banking &#38; Finance 33 (2009) 1299–1311.","apa":"Uhde, A., &#38; Heimeshoff, U. (2009). Consolidation in banking and financial stability in Europe: Empirical evidence. <i>Journal of Banking &#38; Finance</i>, <i>33</i>(7), 1299–1311. <a href=\"https://doi.org/10.1016/j.jbankfin.2009.01.006\">https://doi.org/10.1016/j.jbankfin.2009.01.006</a>"},"jel":["G21","G28","G34","L16"],"date_updated":"2023-01-10T09:36:22Z","volume":33,"author":[{"last_name":"Uhde","orcid":"https://orcid.org/0000-0002-8058-8857","id":"36049","full_name":"Uhde, André","first_name":"André"},{"first_name":"Ulrich","full_name":"Heimeshoff, Ulrich","last_name":"Heimeshoff"}],"doi":"https://doi.org/10.1016/j.jbankfin.2009.01.006","type":"journal_article","status":"public","_id":"4406","department":[{"_id":"186"},{"_id":"188"}],"user_id":"21810","extern":"1"},{"date_updated":"2022-01-06T06:51:08Z","oa":"1","author":[{"last_name":"Bischoff","full_name":"Bischoff, Renke","first_name":"Renke"},{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"first_name":"Wolfgang","full_name":"Schulz, Wolfgang","last_name":"Schulz"},{"full_name":"Heinrichs, Guenther","last_name":"Heinrichs","first_name":"Guenther"}],"date_created":"2019-07-12T05:27:12Z","volume":4,"title":"Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/BiHaScHe02.pdf","open_access":"1"}],"doi":"10.1109/VTC.2002.1002940","year":"2002","citation":{"ama":"Bischoff R, Haeb-Umbach R, Schulz W, Heinrichs G. Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver. In: <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>. Vol 4. ; 2002:1844-1848 vol.4. doi:<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>","chicago":"Bischoff, Renke, Reinhold Haeb-Umbach, Wolfgang Schulz, and Guenther Heinrichs. “Employment of a Multipath Receiver Structure in a Combined GALILEO/UMTS Receiver.” In <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, 4:1844–48 vol.4, 2002. <a href=\"https://doi.org/10.1109/VTC.2002.1002940\">https://doi.org/10.1109/VTC.2002.1002940</a>.","ieee":"R. Bischoff, R. Haeb-Umbach, W. Schulz, and G. Heinrichs, “Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver,” in <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, 2002, vol. 4, pp. 1844–1848 vol.4.","apa":"Bischoff, R., Haeb-Umbach, R., Schulz, W., &#38; Heinrichs, G. (2002). Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver. In <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i> (Vol. 4, pp. 1844–1848 vol.4). <a href=\"https://doi.org/10.1109/VTC.2002.1002940\">https://doi.org/10.1109/VTC.2002.1002940</a>","bibtex":"@inproceedings{Bischoff_Haeb-Umbach_Schulz_Heinrichs_2002, title={Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver}, volume={4}, DOI={<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>}, booktitle={IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)}, author={Bischoff, Renke and Haeb-Umbach, Reinhold and Schulz, Wolfgang and Heinrichs, Guenther}, year={2002}, pages={1844–1848 vol.4} }","short":"R. Bischoff, R. Haeb-Umbach, W. Schulz, G. Heinrichs, in: IEEE 55th Vehicular Technology Conference (VTC 2002 Spring), 2002, pp. 1844–1848 vol.4.","mla":"Bischoff, Renke, et al. “Employment of a Multipath Receiver Structure in a Combined GALILEO/UMTS Receiver.” <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, vol. 4, 2002, pp. 1844–48 vol.4, doi:<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>."},"intvolume":"         4","page":"1844-1848 vol.4","_id":"11733","user_id":"44006","department":[{"_id":"54"}],"keyword":["combined GALILEO/UMTS receiver","delay locked loop","delay lock loops","DLL","Global Positioning System","GLONASS","GPS","GPSIIF/III","mobile satellite communication","multipath channels","multipath receiver structure","radio receivers","RAKE receiver","S-curve"],"language":[{"iso":"eng"}],"type":"conference","publication":"IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)","abstract":[{"lang":"eng","text":"Current navigation systems like GPS (Global Positioning System) and its Russian counterpart GLONASS (Global Navigation Satellite System) only evaluate the direct signal path. The receivers treat the reflected paths also reaching the receiver antenna as disturbance which has to be suppressed. Multipath affects the tracking accuracy by resulting in a degeneration of the S-curve of the DLL (delay locked loop). Nowadays the future European systems GALILEO and GPSIIF/III with two new signals are on the way to the market and it is time to think about new receiver structures. Therefore we investigated if it is possible to use multipath for navigation constructively."}],"status":"public"},{"keyword":["Model Check     Temporal Logic     Object Constraint Language     Execution Path     Kripke Structure"],"language":[{"iso":"eng"}],"_id":"34447","user_id":"5786","department":[{"_id":"672"}],"abstract":[{"text":"The Object Constraint Language (OCL) was introduced to support the specification of constraints for UML diagrams and is mainly used to formulate invariants and operation pre- and postconditions. Though OCL is also applied in behavioral diagrams, e.g., as guards for state transitions, it is currently not possible to specify constraints concerning the dynamic behavior and timing properties of such diagrams.\r\n\r\nThis article discusses OCL’s application for the dynamic behavior of UML Statechart diagrams and presents an OCL extension for specification of state-oriented time-bounded constraints.We introduce operations to extract state configurations from diagrams and define additional predicates over states and state configurations. The semantics of our OCL extension is given by employing time-bounded Computational Tree Logic (CTL) formulae. An example of a flexible manufacturing system with automated guided vehicles demonstrates the application of our extension.","lang":"eng"}],"editor":[{"first_name":"T.","last_name":"Clark","full_name":"Clark, T."},{"first_name":"J.","full_name":"Warmer, J.","last_name":"Warmer"}],"status":"public","type":"book_chapter","publication":"Advances in Object Modelling with the OCL","title":"An OCL Extension for Real-Time Constraints","doi":"10.1007/3-540-45669-4_8","publisher":"Springer-Verlag","date_updated":"2022-12-15T11:38:47Z","date_created":"2022-12-15T11:38:20Z","author":[{"full_name":"Flake, Stephan","last_name":"Flake","first_name":"Stephan"},{"first_name":"Wolfgang","last_name":"Müller","id":"16243","full_name":"Müller, Wolfgang"}],"place":"Berlin, Heidelberg","year":"2002","citation":{"ama":"Flake S, Müller W. An OCL Extension for Real-Time Constraints. In: Clark T, Warmer J, eds. <i>Advances in Object Modelling with the OCL</i>. Springer-Verlag; 2002:150-171. doi:<a href=\"https://doi.org/10.1007/3-540-45669-4_8\">10.1007/3-540-45669-4_8</a>","ieee":"S. Flake and W. Müller, “An OCL Extension for Real-Time Constraints,” in <i>Advances in Object Modelling with the OCL</i>, T. Clark and J. Warmer, Eds. Berlin, Heidelberg: Springer-Verlag, 2002, pp. 150–171.","chicago":"Flake, Stephan, and Wolfgang Müller. “An OCL Extension for Real-Time Constraints.” In <i>Advances in Object Modelling with the OCL</i>, edited by T. Clark and J. Warmer, 150–71. Berlin, Heidelberg: Springer-Verlag, 2002. <a href=\"https://doi.org/10.1007/3-540-45669-4_8\">https://doi.org/10.1007/3-540-45669-4_8</a>.","mla":"Flake, Stephan, and Wolfgang Müller. “An OCL Extension for Real-Time Constraints.” <i>Advances in Object Modelling with the OCL</i>, edited by T. Clark and J. Warmer, Springer-Verlag, 2002, pp. 150–71, doi:<a href=\"https://doi.org/10.1007/3-540-45669-4_8\">10.1007/3-540-45669-4_8</a>.","bibtex":"@inbook{Flake_Müller_2002, place={Berlin, Heidelberg}, title={An OCL Extension for Real-Time Constraints}, DOI={<a href=\"https://doi.org/10.1007/3-540-45669-4_8\">10.1007/3-540-45669-4_8</a>}, booktitle={Advances in Object Modelling with the OCL}, publisher={Springer-Verlag}, author={Flake, Stephan and Müller, Wolfgang}, editor={Clark, T. and Warmer, J.}, year={2002}, pages={150–171} }","short":"S. Flake, W. Müller, in: T. Clark, J. Warmer (Eds.), Advances in Object Modelling with the OCL, Springer-Verlag, Berlin, Heidelberg, 2002, pp. 150–171.","apa":"Flake, S., &#38; Müller, W. (2002). An OCL Extension for Real-Time Constraints. In T. Clark &#38; J. Warmer (Eds.), <i>Advances in Object Modelling with the OCL</i> (pp. 150–171). Springer-Verlag. <a href=\"https://doi.org/10.1007/3-540-45669-4_8\">https://doi.org/10.1007/3-540-45669-4_8</a>"},"page":"150 - 171","publication_identifier":{"isbn":["978-3-540-45669-8"]}}]