[{"status":"public","type":"conference","publication":"PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management","language":[{"iso":"eng"}],"user_id":"83383","department":[{"_id":"52"}],"_id":"63496","citation":{"ama":"Foerster N, Urbaneck D, Schenke M, et al. Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements. In: <i>PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>. ; 2025:2881-2890. doi:<a href=\"https://doi.org/10.30420/566541386\">10.30420/566541386</a>","chicago":"Foerster, Nikolas, Daniel Urbaneck, Maximilian Schenke, Anastacia Ebers, Nicolas Schoenlau, Oliver Wallscheid, and Frank Schafmeister. “Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements.” In <i>PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2881–90, 2025. <a href=\"https://doi.org/10.30420/566541386\">https://doi.org/10.30420/566541386</a>.","ieee":"N. Foerster <i>et al.</i>, “Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements,” in <i>PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2025, pp. 2881–2890, doi: <a href=\"https://doi.org/10.30420/566541386\">10.30420/566541386</a>.","apa":"Foerster, N., Urbaneck, D., Schenke, M., Ebers, A., Schoenlau, N., Wallscheid, O., &#38; Schafmeister, F. (2025). Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements. <i>PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2881–2890. <a href=\"https://doi.org/10.30420/566541386\">https://doi.org/10.30420/566541386</a>","short":"N. Foerster, D. Urbaneck, M. Schenke, A. Ebers, N. Schoenlau, O. Wallscheid, F. Schafmeister, in: PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2025, pp. 2881–2890.","bibtex":"@inproceedings{Foerster_Urbaneck_Schenke_Ebers_Schoenlau_Wallscheid_Schafmeister_2025, title={Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements}, DOI={<a href=\"https://doi.org/10.30420/566541386\">10.30420/566541386</a>}, booktitle={PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, author={Foerster, Nikolas and Urbaneck, Daniel and Schenke, Maximilian and Ebers, Anastacia and Schoenlau, Nicolas and Wallscheid, Oliver and Schafmeister, Frank}, year={2025}, pages={2881–2890} }","mla":"Foerster, Nikolas, et al. “Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements.” <i>PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2025, pp. 2881–90, doi:<a href=\"https://doi.org/10.30420/566541386\">10.30420/566541386</a>."},"page":"2881-2890","year":"2025","doi":"10.30420/566541386","title":"Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements","date_created":"2026-01-06T08:04:10Z","author":[{"first_name":"Nikolas","full_name":"Foerster, Nikolas","last_name":"Foerster"},{"first_name":"Daniel","last_name":"Urbaneck","full_name":"Urbaneck, Daniel"},{"full_name":"Schenke, Maximilian","last_name":"Schenke","first_name":"Maximilian"},{"full_name":"Ebers, Anastacia","last_name":"Ebers","first_name":"Anastacia"},{"last_name":"Schoenlau","full_name":"Schoenlau, Nicolas","first_name":"Nicolas"},{"first_name":"Oliver","last_name":"Wallscheid","full_name":"Wallscheid, Oliver"},{"first_name":"Frank","full_name":"Schafmeister, Frank","last_name":"Schafmeister"}],"date_updated":"2026-01-06T08:05:25Z"},{"type":"journal_article","status":"public","user_id":"103302","department":[{"_id":"157"},{"_id":"876"},{"_id":"321"},{"_id":"9"}],"_id":"60837","article_number":"100332","article_type":"original","publication_status":"published","publication_identifier":{"issn":["2666-3309"]},"citation":{"bibtex":"@article{Jordan_Hermelingmeier_Gilich_Meschut_De Santis_Schlüter_2025, title={Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills}, volume={12}, DOI={<a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">10.1016/j.jajp.2025.100332</a>}, number={100332}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier}, author={Jordan, Alex and Hermelingmeier, Lucas and Gilich, Julian and Meschut, Gerson and De Santis, Marco Sebastian and Schlüter, Alexander}, year={2025} }","mla":"Jordan, Alex, et al. “Comparison of the Economic Efficiency and Sustainability of Two Debonding Processes for Structurally Bonded Sills.” <i>Journal of Advanced Joining Processes</i>, vol. 12, 100332, Elsevier, 2025, doi:<a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">10.1016/j.jajp.2025.100332</a>.","short":"A. Jordan, L. Hermelingmeier, J. Gilich, G. Meschut, M.S. De Santis, A. Schlüter, Journal of Advanced Joining Processes 12 (2025).","apa":"Jordan, A., Hermelingmeier, L., Gilich, J., Meschut, G., De Santis, M. S., &#38; Schlüter, A. (2025). Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills. <i>Journal of Advanced Joining Processes</i>, <i>12</i>, Article 100332. <a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">https://doi.org/10.1016/j.jajp.2025.100332</a>","ama":"Jordan A, Hermelingmeier L, Gilich J, Meschut G, De Santis MS, Schlüter A. Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills. <i>Journal of Advanced Joining Processes</i>. 2025;12. doi:<a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">10.1016/j.jajp.2025.100332</a>","ieee":"A. Jordan, L. Hermelingmeier, J. Gilich, G. Meschut, M. S. De Santis, and A. Schlüter, “Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills,” <i>Journal of Advanced Joining Processes</i>, vol. 12, Art. no. 100332, 2025, doi: <a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">10.1016/j.jajp.2025.100332</a>.","chicago":"Jordan, Alex, Lucas Hermelingmeier, Julian Gilich, Gerson Meschut, Marco Sebastian De Santis, and Alexander Schlüter. “Comparison of the Economic Efficiency and Sustainability of Two Debonding Processes for Structurally Bonded Sills.” <i>Journal of Advanced Joining Processes</i> 12 (2025). <a href=\"https://doi.org/10.1016/j.jajp.2025.100332\">https://doi.org/10.1016/j.jajp.2025.100332</a>."},"intvolume":"        12","author":[{"id":"62451","full_name":"Jordan, Alex","orcid":"0009-0007-9546-6071","last_name":"Jordan","first_name":"Alex"},{"id":"58649","full_name":"Hermelingmeier, Lucas","last_name":"Hermelingmeier","first_name":"Lucas"},{"first_name":"Julian","id":"44391","full_name":"Gilich, Julian","last_name":"Gilich"},{"first_name":"Gerson","full_name":"Meschut, Gerson","id":"32056","last_name":"Meschut","orcid":"0000-0002-2763-1246"},{"first_name":"Marco Sebastian","last_name":"De Santis","id":"52239","full_name":"De Santis, Marco Sebastian"},{"orcid":"0000-0002-2569-1624","last_name":"Schlüter","id":"103302","full_name":"Schlüter, Alexander","first_name":"Alexander"}],"volume":12,"date_updated":"2026-01-06T08:22:54Z","oa":"1","main_file_link":[{"url":"https://www.sciencedirect.com/science/article/pii/S2666330925000536?via%3Dihub","open_access":"1"}],"doi":"10.1016/j.jajp.2025.100332","publication":"Journal of Advanced Joining Processes","abstract":[{"text":"In light of growing demands for resource efficiency and sustainability in vehicle engineering, the environmentally compatible separation of structural adhesive joints is gaining increasing relevance. This study presents a comparative analysis of two physically based debonding methods: the established hot-air process and a cryogenic cold process based on liquid nitrogen (LN2). The primary objective is to assess the ecological impact and process-related sustainability of both approaches.\r\nExperimental investigations were conducted on a component-representative triple-sheet structure that simulates common automotive flange joints. Thermal input was applied either by convective heating using a hot air gun or by direct cooling through a contact-based LN2 tool. The resulting temperature profiles were recorded using spatially distributed thermocouples. Subsequently, the outer panel was selectively debonded to replicate a repair scenario, and the mechanical integrity of the remaining adhesive joint was evaluated through Mode I testing of L-shaped specimens. Process data served as input for an Life Cycle Assessment (LCA) according to DIN EN ISO 14040.\r\nThe cryogenic method achieved a 40% reduction in carbon footprint compared to the hot-air process (0.337 kg vs. 0.559 kg CO2-equivalents), primarily due to its shorter process time and more efficient heat transfer. While the hot-air method’s impact is mainly driven by electrical energy use, that of the cold method stems from cryogenic media consumption. Notwithstanding certain disadvantages in specific impact categories, the LN2-based process exhibits a superior overall ecological performance and signifies a promising solution for repair- and recycling-oriented adhesive separation in structural vehicle applications.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["Sustainable debonding","Structural adhesives","Sustainable joining technologies","Life Cycle Assessment (LCA)","Automotive repair process","Economically efficient debonding"],"quality_controlled":"1","year":"2025","date_created":"2025-07-30T11:04:28Z","publisher":"Elsevier","title":"Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills"},{"title":"Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen","main_file_link":[{"url":"https://oa.tib.eu/renate/bitstreams/9121e5bb-d113-4cfe-8fc6-610465afcd66/download","open_access":"1"}],"doi":"10.34657/26753","date_updated":"2026-01-06T08:09:33Z","oa":"1","publisher":"Technische Informationsbibliothek","author":[{"first_name":"Michael","full_name":"Haase, Michael","id":"35970","last_name":"Haase"},{"last_name":"Behrendt","full_name":"Behrendt, Marius","first_name":"Marius"},{"first_name":"Florian","full_name":"Hengsbach, Florian","id":"14073","last_name":"Hengsbach"},{"first_name":"Vinay","full_name":"Kunnathully Sathees Kumar, Vinay","id":"60979","last_name":"Kunnathully Sathees Kumar"},{"last_name":"Magerkohl","full_name":"Magerkohl, Sebastian","id":"28520","first_name":"Sebastian"},{"first_name":"Balázs","id":"97759","full_name":"Magyar, Balázs","last_name":"Magyar"},{"first_name":"Bernd","full_name":"Ponick, Bernd","last_name":"Ponick"},{"last_name":"Schaper","full_name":"Schaper, Mirko","id":"43720","first_name":"Mirko"},{"id":"604","full_name":"Zimmer, Detmar","last_name":"Zimmer","first_name":"Detmar"}],"date_created":"2025-12-18T12:14:12Z","place":"Hannover","year":"2025","citation":{"chicago":"Haase, Michael, Marius Behrendt, Florian Hengsbach, Vinay Kunnathully Sathees Kumar, Sebastian Magerkohl, Balázs Magyar, Bernd Ponick, Mirko Schaper, and Detmar Zimmer. <i>Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen</i>. Hannover: Technische Informationsbibliothek, 2025. <a href=\"https://doi.org/10.34657/26753\">https://doi.org/10.34657/26753</a>.","ieee":"M. Haase <i>et al.</i>, <i>Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen</i>. Hannover: Technische Informationsbibliothek, 2025.","ama":"Haase M, Behrendt M, Hengsbach F, et al. <i>Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen</i>. Technische Informationsbibliothek; 2025. doi:<a href=\"https://doi.org/10.34657/26753\">10.34657/26753</a>","bibtex":"@book{Haase_Behrendt_Hengsbach_Kunnathully Sathees Kumar_Magerkohl_Magyar_Ponick_Schaper_Zimmer_2025, place={Hannover}, title={Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen}, DOI={<a href=\"https://doi.org/10.34657/26753\">10.34657/26753</a>}, publisher={Technische Informationsbibliothek}, author={Haase, Michael and Behrendt, Marius and Hengsbach, Florian and Kunnathully Sathees Kumar, Vinay and Magerkohl, Sebastian and Magyar, Balázs and Ponick, Bernd and Schaper, Mirko and Zimmer, Detmar}, year={2025} }","short":"M. Haase, M. Behrendt, F. Hengsbach, V. Kunnathully Sathees Kumar, S. Magerkohl, B. Magyar, B. Ponick, M. Schaper, D. Zimmer, Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen, Technische Informationsbibliothek, Hannover, 2025.","mla":"Haase, Michael, et al. <i>Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen</i>. Technische Informationsbibliothek, 2025, doi:<a href=\"https://doi.org/10.34657/26753\">10.34657/26753</a>.","apa":"Haase, M., Behrendt, M., Hengsbach, F., Kunnathully Sathees Kumar, V., Magerkohl, S., Magyar, B., Ponick, B., Schaper, M., &#38; Zimmer, D. (2025). <i>Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen</i>. Technische Informationsbibliothek. <a href=\"https://doi.org/10.34657/26753\">https://doi.org/10.34657/26753</a>"},"publication_status":"published","has_accepted_license":"1","keyword":["Additive Fertigung","Elektromotor","Leichtbau","Synchronmotor","DFG"],"language":[{"iso":"ger"}],"_id":"63209","user_id":"97759","department":[{"_id":"146"},{"_id":"158"}],"abstract":[{"text":"Die DFG-Projekte AddFeRo-PM (406108415) und AddFeRo-SR (465089065) untersuchten die Potenziale des LB-PBF/M-Verfahrens zur Herstellung von Rotoren für unterschiedliche elektrische Maschinen. Im interdisziplinären Ansatz wurden Materialentwicklung und mechanische sowie elektromagnetische Optimierung verbunden. Im Projekt „AddFeRo-PM“ wurde der Rotor einer permanentmagneterregten Synchron- maschine (PMSM) untersucht. FeSi erwies sich als geeignete Legierung, konnte aber wegen Spannungsrissen nur bis zu 3 % Siliziumanteil (kurz: FeSi3) verarbeitet werden. Mechanische und elektromagnetische Untersuchungen ermöglichten eine 3D-Optimierung der Rotorgeometrie und -struktur. Der Demonstrator wurde additiv gefertigt und zeigt Leicht-baupotenziale sowie reduzierte Drehmomentwelligkeit. Im Folgeprojekt „AddFeRo-SR“ kam eine Hochtemperatur-Bauraumheizung (HTBH) zum Einsatz, die FeSi mit 6,5 % Siliziumanteil verarbeitbar machte, welches bessere elektro- magnetische Eigenschaften bietet. Sie wurde bei einer Synchron-Reluktanzmaschine (SynRM) getestet. Eine hybride Rotorfertigung erwies sich jedoch aufgrund von HTBH-Einschränkungen als ungeeignet, weshalb eine einteilige Fertigung mit FeSi3 umgesetzt wurde. Experimente bestätigten vergleichbare Betriebsergebnisse zur konventionellen Fertigung bei reduzierter Rotormasse. Zusätzlich wurde eine Methodik entwickelt, um additive Verfahren als Ergänzung zur konventionellen Fertigung zu integrieren. Beide Projekte zeigen das Potenzial additiver Fertigung für Leichtbau und Wirkungsgradsteigerung im Elektromaschinenbau und bieten wertvolle Grundlagen für industrielle Anwendungen.","lang":"ger"}],"status":"public","type":"report"},{"year":"2025","quality_controlled":"1","issue":"2","title":"Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study","publisher":"SDEWES Centre","date_created":"2025-07-21T09:04:07Z","publication":"Journal of Sustainable Development Indicators","language":[{"iso":"eng"}],"citation":{"apa":"Díaz Canales, E. B., Avila Galarza, A., Schlüter, S., Lacayo Escobar, E., &#38; Schlüter, A. (2025). Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study. <i>Journal of Sustainable Development Indicators</i>, <i>1</i>(2), 1–26. <a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">https://doi.org/10.13044/j.sdi.d2.0592</a>","bibtex":"@article{Díaz Canales_Avila Galarza_Schlüter_Lacayo Escobar_Schlüter_2025, title={Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study}, volume={1}, DOI={<a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">10.13044/j.sdi.d2.0592</a>}, number={2}, journal={Journal of Sustainable Development Indicators}, publisher={SDEWES Centre}, author={Díaz Canales, Edith Benjamina and Avila Galarza, Alfredo and Schlüter, Sabine and Lacayo Escobar, Erick and Schlüter, Alexander}, year={2025}, pages={1–26} }","mla":"Díaz Canales, Edith Benjamina, et al. “Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study.” <i>Journal of Sustainable Development Indicators</i>, vol. 1, no. 2, SDEWES Centre, 2025, pp. 1–26, doi:<a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">10.13044/j.sdi.d2.0592</a>.","short":"E.B. Díaz Canales, A. Avila Galarza, S. Schlüter, E. Lacayo Escobar, A. Schlüter, Journal of Sustainable Development Indicators 1 (2025) 1–26.","ieee":"E. B. Díaz Canales, A. Avila Galarza, S. Schlüter, E. Lacayo Escobar, and A. Schlüter, “Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study,” <i>Journal of Sustainable Development Indicators</i>, vol. 1, no. 2, pp. 1–26, 2025, doi: <a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">10.13044/j.sdi.d2.0592</a>.","chicago":"Díaz Canales, Edith Benjamina, Alfredo Avila Galarza, Sabine Schlüter, Erick Lacayo Escobar, and Alexander Schlüter. “Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study.” <i>Journal of Sustainable Development Indicators</i> 1, no. 2 (2025): 1–26. <a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">https://doi.org/10.13044/j.sdi.d2.0592</a>.","ama":"Díaz Canales EB, Avila Galarza A, Schlüter S, Lacayo Escobar E, Schlüter A. Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study. <i>Journal of Sustainable Development Indicators</i>. 2025;1(2):1-26. doi:<a href=\"https://doi.org/10.13044/j.sdi.d2.0592\">10.13044/j.sdi.d2.0592</a>"},"intvolume":"         1","page":"1-26","publication_status":"published","publication_identifier":{"issn":["3044-5221"]},"doi":"10.13044/j.sdi.d2.0592","date_updated":"2026-01-06T08:13:25Z","author":[{"last_name":"Díaz Canales","orcid":"0009-0007-2748-0074","full_name":"Díaz Canales, Edith Benjamina","id":"105704","first_name":"Edith Benjamina"},{"last_name":"Avila Galarza","full_name":"Avila Galarza, Alfredo","first_name":"Alfredo"},{"last_name":"Schlüter","full_name":"Schlüter, Sabine","first_name":"Sabine"},{"first_name":"Erick","full_name":"Lacayo Escobar, Erick","last_name":"Lacayo Escobar"},{"id":"103302","full_name":"Schlüter, Alexander","last_name":"Schlüter","orcid":"0000-0002-2569-1624","first_name":"Alexander"}],"volume":1,"status":"public","type":"journal_article","article_type":"original","_id":"60681","user_id":"103302","department":[{"_id":"9"},{"_id":"876"},{"_id":"321"},{"_id":"393"}]},{"_id":"59841","department":[{"_id":"876"},{"_id":"321"},{"_id":"9"},{"_id":"393"}],"user_id":"103302","language":[{"iso":"eng"}],"publication":"Accelerating the Transition to a Hydrogen Economy","type":"book_chapter","status":"public","date_updated":"2026-01-06T08:23:15Z","publisher":"Elsevier","date_created":"2025-05-07T11:57:50Z","author":[{"first_name":"Matteo","full_name":"Genovese, Matteo","last_name":"Genovese"},{"last_name":"Piraino","full_name":"Piraino, Francesco","first_name":"Francesco"},{"first_name":"Orlando","full_name":"Corigliano, Orlando","last_name":"Corigliano"},{"first_name":"Alexander","last_name":"Schlüter","orcid":"0000-0002-2569-1624","id":"103302","full_name":"Schlüter, Alexander"},{"first_name":"Eugenio","last_name":"Scionti","full_name":"Scionti, Eugenio"},{"last_name":"Fragiacomo","full_name":"Fragiacomo, Petronilla","first_name":"Petronilla"}],"title":"Hydrogen economy development in the European Union","doi":"10.1016/b978-0-443-24002-7.00005-7","publication_identifier":{"isbn":["9780443240027"]},"publication_status":"published","year":"2025","citation":{"bibtex":"@inbook{Genovese_Piraino_Corigliano_Schlüter_Scionti_Fragiacomo_2025, title={Hydrogen economy development in the European Union}, DOI={<a href=\"https://doi.org/10.1016/b978-0-443-24002-7.00005-7\">10.1016/b978-0-443-24002-7.00005-7</a>}, booktitle={Accelerating the Transition to a Hydrogen Economy}, publisher={Elsevier}, author={Genovese, Matteo and Piraino, Francesco and Corigliano, Orlando and Schlüter, Alexander and Scionti, Eugenio and Fragiacomo, Petronilla}, year={2025} }","short":"M. Genovese, F. Piraino, O. Corigliano, A. Schlüter, E. Scionti, P. Fragiacomo, in: Accelerating the Transition to a Hydrogen Economy, Elsevier, 2025.","mla":"Genovese, Matteo, et al. “Hydrogen Economy Development in the European Union.” <i>Accelerating the Transition to a Hydrogen Economy</i>, Elsevier, 2025, doi:<a href=\"https://doi.org/10.1016/b978-0-443-24002-7.00005-7\">10.1016/b978-0-443-24002-7.00005-7</a>.","apa":"Genovese, M., Piraino, F., Corigliano, O., Schlüter, A., Scionti, E., &#38; Fragiacomo, P. (2025). Hydrogen economy development in the European Union. In <i>Accelerating the Transition to a Hydrogen Economy</i>. Elsevier. <a href=\"https://doi.org/10.1016/b978-0-443-24002-7.00005-7\">https://doi.org/10.1016/b978-0-443-24002-7.00005-7</a>","ama":"Genovese M, Piraino F, Corigliano O, Schlüter A, Scionti E, Fragiacomo P. Hydrogen economy development in the European Union. In: <i>Accelerating the Transition to a Hydrogen Economy</i>. Elsevier; 2025. doi:<a href=\"https://doi.org/10.1016/b978-0-443-24002-7.00005-7\">10.1016/b978-0-443-24002-7.00005-7</a>","ieee":"M. Genovese, F. Piraino, O. Corigliano, A. Schlüter, E. Scionti, and P. Fragiacomo, “Hydrogen economy development in the European Union,” in <i>Accelerating the Transition to a Hydrogen Economy</i>, Elsevier, 2025.","chicago":"Genovese, Matteo, Francesco Piraino, Orlando Corigliano, Alexander Schlüter, Eugenio Scionti, and Petronilla Fragiacomo. “Hydrogen Economy Development in the European Union.” In <i>Accelerating the Transition to a Hydrogen Economy</i>. Elsevier, 2025. <a href=\"https://doi.org/10.1016/b978-0-443-24002-7.00005-7\">https://doi.org/10.1016/b978-0-443-24002-7.00005-7</a>."}},{"article_number":"rnaf074","language":[{"iso":"eng"}],"_id":"63505","user_id":"100325","abstract":[{"text":"<jats:title>Abstract</jats:title>\n               <jats:p>The main goal of this work is to study the $L^{p}$-asymptotic behavior of solutions to the heat equation on arbitrary rank Riemannian symmetric spaces of non-compact-type $G/K$ for non-bi-$K$ invariant initial data. For initial data $u_{0}$ compactly supported or in a weighted $L^{1}(G/K)$ space with a weight depending on $p\\in [1, \\infty ]$, we introduce a mass function $M_{p}(u_{0})(\\cdot )$, and prove that if $h_{t}$ is the heat kernel on $G/K$, then $$ \\begin{align*} &amp;\\|h_t\\|_p^{-1}\\,\\|u_0\\ast h_t \\, - \\,M_p(u_0)(\\cdot)\\,h_t\\|_p \\rightarrow 0 \\quad \\textrm{as} \\quad t\\rightarrow \\infty.\\end{align*} $$ Interestingly, the $L^{p}$ heat concentration leads to completely different expressions of the mass function for $1\\leq p &amp;lt;2$ and $2\\leq p\\leq \\infty $. If we further assume that the initial data are bi-$K$-invariant, then our mass function boils down to the constant $\\int _{G/K}u_{0}$ in the case $p=1$, and more generally to $\\mathcal{H}{u_{0}}(i\\rho (2/p-1))$ if $1\\leq p&amp;lt;2$, and to $\\mathcal{H}{u_{0}}(0)$ if $2\\leq p \\leq \\infty $. Thus, we improve upon results by Vázquez, Anker et al., and Naik et al., clarifying the nature of the problem.</jats:p>","lang":"eng"}],"status":"public","publication":"International Mathematics Research Notices","type":"journal_article","title":"<i>L</i>\n          p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions","doi":"10.1093/imrn/rnaf074","publisher":"Oxford University Press (OUP)","date_updated":"2026-01-06T09:45:12Z","volume":2025,"date_created":"2026-01-06T09:45:00Z","author":[{"last_name":"Papageorgiou","full_name":"Papageorgiou, Effie","first_name":"Effie"}],"year":"2025","intvolume":"      2025","citation":{"ama":"Papageorgiou E. <i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions. <i>International Mathematics Research Notices</i>. 2025;2025(7). doi:<a href=\"https://doi.org/10.1093/imrn/rnaf074\">10.1093/imrn/rnaf074</a>","ieee":"E. Papageorgiou, “<i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions,” <i>International Mathematics Research Notices</i>, vol. 2025, no. 7, Art. no. rnaf074, 2025, doi: <a href=\"https://doi.org/10.1093/imrn/rnaf074\">10.1093/imrn/rnaf074</a>.","chicago":"Papageorgiou, Effie. “<i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-Symmetric Solutions.” <i>International Mathematics Research Notices</i> 2025, no. 7 (2025). <a href=\"https://doi.org/10.1093/imrn/rnaf074\">https://doi.org/10.1093/imrn/rnaf074</a>.","mla":"Papageorgiou, Effie. “<i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-Symmetric Solutions.” <i>International Mathematics Research Notices</i>, vol. 2025, no. 7, rnaf074, Oxford University Press (OUP), 2025, doi:<a href=\"https://doi.org/10.1093/imrn/rnaf074\">10.1093/imrn/rnaf074</a>.","short":"E. Papageorgiou, International Mathematics Research Notices 2025 (2025).","bibtex":"@article{Papageorgiou_2025, title={<i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions}, volume={2025}, DOI={<a href=\"https://doi.org/10.1093/imrn/rnaf074\">10.1093/imrn/rnaf074</a>}, number={7rnaf074}, journal={International Mathematics Research Notices}, publisher={Oxford University Press (OUP)}, author={Papageorgiou, Effie}, year={2025} }","apa":"Papageorgiou, E. (2025). <i>L</i>           p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions. <i>International Mathematics Research Notices</i>, <i>2025</i>(7), Article rnaf074. <a href=\"https://doi.org/10.1093/imrn/rnaf074\">https://doi.org/10.1093/imrn/rnaf074</a>"},"publication_identifier":{"issn":["1073-7928","1687-0247"]},"publication_status":"published","issue":"7"},{"citation":{"ama":"Bruno T, Papageorgiou E. Pointwise convergence to initial data for some evolution equations on symmetric spaces. <i>Journal d’Analyse Mathématique</i>. 2025;157(2):733-767. doi:<a href=\"https://doi.org/10.1007/s11854-025-0403-2\">10.1007/s11854-025-0403-2</a>","ieee":"T. Bruno and E. Papageorgiou, “Pointwise convergence to initial data for some evolution equations on symmetric spaces,” <i>Journal d’Analyse Mathématique</i>, vol. 157, no. 2, pp. 733–767, 2025, doi: <a href=\"https://doi.org/10.1007/s11854-025-0403-2\">10.1007/s11854-025-0403-2</a>.","chicago":"Bruno, Tommaso, and Effie Papageorgiou. “Pointwise Convergence to Initial Data for Some Evolution Equations on Symmetric Spaces.” <i>Journal d’Analyse Mathématique</i> 157, no. 2 (2025): 733–67. <a href=\"https://doi.org/10.1007/s11854-025-0403-2\">https://doi.org/10.1007/s11854-025-0403-2</a>.","short":"T. Bruno, E. Papageorgiou, Journal d’Analyse Mathématique 157 (2025) 733–767.","mla":"Bruno, Tommaso, and Effie Papageorgiou. “Pointwise Convergence to Initial Data for Some Evolution Equations on Symmetric Spaces.” <i>Journal d’Analyse Mathématique</i>, vol. 157, no. 2, Springer Science and Business Media LLC, 2025, pp. 733–67, doi:<a href=\"https://doi.org/10.1007/s11854-025-0403-2\">10.1007/s11854-025-0403-2</a>.","bibtex":"@article{Bruno_Papageorgiou_2025, title={Pointwise convergence to initial data for some evolution equations on symmetric spaces}, volume={157}, DOI={<a href=\"https://doi.org/10.1007/s11854-025-0403-2\">10.1007/s11854-025-0403-2</a>}, number={2}, journal={Journal d’Analyse Mathématique}, publisher={Springer Science and Business Media LLC}, author={Bruno, Tommaso and Papageorgiou, Effie}, year={2025}, pages={733–767} }","apa":"Bruno, T., &#38; Papageorgiou, E. (2025). Pointwise convergence to initial data for some evolution equations on symmetric spaces. <i>Journal d’Analyse Mathématique</i>, <i>157</i>(2), 733–767. <a href=\"https://doi.org/10.1007/s11854-025-0403-2\">https://doi.org/10.1007/s11854-025-0403-2</a>"},"intvolume":"       157","page":"733-767","year":"2025","issue":"2","publication_status":"published","publication_identifier":{"issn":["0021-7670","1565-8538"]},"doi":"10.1007/s11854-025-0403-2","title":"Pointwise convergence to initial data for some evolution equations on symmetric spaces","author":[{"full_name":"Bruno, Tommaso","last_name":"Bruno","first_name":"Tommaso"},{"first_name":"Effie","full_name":"Papageorgiou, Effie","last_name":"Papageorgiou"}],"date_created":"2026-01-06T09:40:00Z","volume":157,"date_updated":"2026-01-06T09:41:02Z","publisher":"Springer Science and Business Media LLC","status":"public","type":"journal_article","publication":"Journal d'Analyse Mathématique","language":[{"iso":"eng"}],"user_id":"100325","_id":"63503"},{"year":"2025","place":"Abu Dhabi, UAE","page":"6420–6446","citation":{"ieee":"N. Srivastava <i>et al.</i>, “LOLA – An Open-Source Massively Multilingual Large Language Model,” in <i>Proceedings of the 31st International Conference on Computational Linguistics</i>, 2025, pp. 6420–6446.","chicago":"Srivastava, Nikit, Denis Kuchelev, Tatiana Moteu Ngoli, Kshitij Shetty, Michael Röder, Hamada Mohamed Abdelsamee Zahera, Diego Moussallem, and Axel-Cyrille Ngonga Ngomo. “LOLA – An Open-Source Massively Multilingual Large Language Model.” In <i>Proceedings of the 31st International Conference on Computational Linguistics</i>, edited by Owen Rambow, Leo Wanner, Marianna Apidianaki, Hend Al-Khalifa, Barbara Di Eugenio, and Steven Schockaert, 6420–6446. Abu Dhabi, UAE: Association for Computational Linguistics, 2025.","ama":"Srivastava N, Kuchelev D, Moteu Ngoli T, et al. LOLA – An Open-Source Massively Multilingual Large Language Model. In: Rambow O, Wanner L, Apidianaki M, Al-Khalifa H, Eugenio BD, Schockaert S, eds. <i>Proceedings of the 31st International Conference on Computational Linguistics</i>. Association for Computational Linguistics; 2025:6420–6446.","mla":"Srivastava, Nikit, et al. “LOLA – An Open-Source Massively Multilingual Large Language Model.” <i>Proceedings of the 31st International Conference on Computational Linguistics</i>, edited by Owen Rambow et al., Association for Computational Linguistics, 2025, pp. 6420–6446.","bibtex":"@inproceedings{Srivastava_Kuchelev_Moteu Ngoli_Shetty_Röder_Zahera_Moussallem_Ngonga Ngomo_2025, place={Abu Dhabi, UAE}, title={LOLA – An Open-Source Massively Multilingual Large Language Model}, booktitle={Proceedings of the 31st International Conference on Computational Linguistics}, publisher={Association for Computational Linguistics}, author={Srivastava, Nikit and Kuchelev, Denis and Moteu Ngoli, Tatiana and Shetty, Kshitij and Röder, Michael and Zahera, Hamada Mohamed Abdelsamee and Moussallem, Diego and Ngonga Ngomo, Axel-Cyrille}, editor={Rambow, Owen and Wanner, Leo and Apidianaki, Marianna and Al-Khalifa, Hend and Eugenio, Barbara Di and Schockaert, Steven}, year={2025}, pages={6420–6446} }","short":"N. Srivastava, D. Kuchelev, T. Moteu Ngoli, K. Shetty, M. Röder, H.M.A. Zahera, D. Moussallem, A.-C. Ngonga Ngomo, in: O. Rambow, L. Wanner, M. Apidianaki, H. Al-Khalifa, B.D. Eugenio, S. Schockaert (Eds.), Proceedings of the 31st International Conference on Computational Linguistics, Association for Computational Linguistics, Abu Dhabi, UAE, 2025, pp. 6420–6446.","apa":"Srivastava, N., Kuchelev, D., Moteu Ngoli, T., Shetty, K., Röder, M., Zahera, H. M. A., Moussallem, D., &#38; Ngonga Ngomo, A.-C. (2025). LOLA – An Open-Source Massively Multilingual Large Language Model. In O. Rambow, L. Wanner, M. Apidianaki, H. Al-Khalifa, B. D. Eugenio, &#38; S. Schockaert (Eds.), <i>Proceedings of the 31st International Conference on Computational Linguistics</i> (pp. 6420–6446). Association for Computational Linguistics."},"publisher":"Association for Computational Linguistics","oa":"1","date_updated":"2026-01-06T10:11:37Z","author":[{"full_name":"Srivastava, Nikit","id":"70066","last_name":"Srivastava","orcid":"0009-0004-5164-4911","first_name":"Nikit"},{"full_name":"Kuchelev, Denis","id":"70842","last_name":"Kuchelev","first_name":"Denis"},{"last_name":"Moteu Ngoli","id":"99174","full_name":"Moteu Ngoli, Tatiana","first_name":"Tatiana"},{"last_name":"Shetty","full_name":"Shetty, Kshitij","first_name":"Kshitij"},{"orcid":"https://orcid.org/0000-0002-8609-8277","last_name":"Röder","full_name":"Röder, Michael","id":"67199","first_name":"Michael"},{"first_name":"Hamada Mohamed Abdelsamee","orcid":"0000-0003-0215-1278","last_name":"Zahera","id":"72768","full_name":"Zahera, Hamada Mohamed Abdelsamee"},{"first_name":"Diego","last_name":"Moussallem","id":"71635","full_name":"Moussallem, Diego"},{"first_name":"Axel-Cyrille","last_name":"Ngonga Ngomo","full_name":"Ngonga Ngomo, Axel-Cyrille","id":"65716"}],"date_created":"2025-10-08T11:02:30Z","title":"LOLA – An Open-Source Massively Multilingual Large Language Model","main_file_link":[{"url":"https://aclanthology.org/2025.coling-main.428.pdf","open_access":"1"}],"publication":"Proceedings of the 31st International Conference on Computational Linguistics","type":"conference","editor":[{"full_name":"Rambow, Owen","last_name":"Rambow","first_name":"Owen"},{"last_name":"Wanner","full_name":"Wanner, Leo","first_name":"Leo"},{"first_name":"Marianna","last_name":"Apidianaki","full_name":"Apidianaki, Marianna"},{"full_name":"Al-Khalifa, Hend","last_name":"Al-Khalifa","first_name":"Hend"},{"last_name":"Eugenio","full_name":"Eugenio, Barbara Di","first_name":"Barbara Di"},{"last_name":"Schockaert","full_name":"Schockaert, Steven","first_name":"Steven"}],"abstract":[{"text":"This paper presents LOLA, a massively multilingual large language model trained on more than 160 languages using a sparse Mixture-of-Experts Transformer architecture. Our architectural and implementation choices address the challenge of harnessing linguistic diversity while maintaining efficiency and avoiding the common pitfalls of multilinguality. Our analysis of the evaluation results shows competitive performance in natural language generation and understanding tasks. Additionally, we demonstrate how the learned expert-routing mechanism exploits implicit phylogenetic linguistic patterns to potentially alleviate the curse of multilinguality. We provide an in-depth look at the training process, an analysis of the datasets, and a balanced exploration of the model{’}s strengths and limitations. As an open-source model, LOLA promotes reproducibility and serves as a robust foundation for future research. Our findings enable the development of compute-efficient multilingual models with strong, scalable performance across languages.","lang":"eng"}],"status":"public","_id":"61753","user_id":"70066","language":[{"iso":"eng"}]},{"user_id":"67199","department":[{"_id":"574"},{"_id":"923"}],"_id":"63507","language":[{"iso":"eng"}],"type":"book_chapter","publication":"Lecture Notes in Computer Science","status":"public","author":[{"last_name":"Pandit","full_name":"Pandit, Gaurav","first_name":"Gaurav"},{"first_name":"Michael","full_name":"Röder, Michael","id":"67199","last_name":"Röder","orcid":"https://orcid.org/0000-0002-8609-8277"},{"first_name":"Axel-Cyrille","last_name":"Ngonga Ngomo","full_name":"Ngonga Ngomo, Axel-Cyrille","id":"65716"}],"date_created":"2026-01-06T09:53:58Z","publisher":"Springer Nature Switzerland","date_updated":"2026-01-06T09:55:26Z","doi":"10.1007/978-3-031-94575-5_4","title":"Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings","publication_status":"published","publication_identifier":{"isbn":["9783031945748","9783031945755"],"issn":["0302-9743","1611-3349"]},"citation":{"chicago":"Pandit, Gaurav, Michael Röder, and Axel-Cyrille Ngonga Ngomo. “Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings.” In <i>Lecture Notes in Computer Science</i>. Cham: Springer Nature Switzerland, 2025. <a href=\"https://doi.org/10.1007/978-3-031-94575-5_4\">https://doi.org/10.1007/978-3-031-94575-5_4</a>.","ieee":"G. Pandit, M. Röder, and A.-C. Ngonga Ngomo, “Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings,” in <i>Lecture Notes in Computer Science</i>, Cham: Springer Nature Switzerland, 2025.","ama":"Pandit G, Röder M, Ngonga Ngomo A-C. Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings. In: <i>Lecture Notes in Computer Science</i>. Springer Nature Switzerland; 2025. doi:<a href=\"https://doi.org/10.1007/978-3-031-94575-5_4\">10.1007/978-3-031-94575-5_4</a>","bibtex":"@inbook{Pandit_Röder_Ngonga Ngomo_2025, place={Cham}, title={Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings}, DOI={<a href=\"https://doi.org/10.1007/978-3-031-94575-5_4\">10.1007/978-3-031-94575-5_4</a>}, booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland}, author={Pandit, Gaurav and Röder, Michael and Ngonga Ngomo, Axel-Cyrille}, year={2025} }","short":"G. Pandit, M. Röder, A.-C. Ngonga Ngomo, in: Lecture Notes in Computer Science, Springer Nature Switzerland, Cham, 2025.","mla":"Pandit, Gaurav, et al. “Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings.” <i>Lecture Notes in Computer Science</i>, Springer Nature Switzerland, 2025, doi:<a href=\"https://doi.org/10.1007/978-3-031-94575-5_4\">10.1007/978-3-031-94575-5_4</a>.","apa":"Pandit, G., Röder, M., &#38; Ngonga Ngomo, A.-C. (2025). Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings. In <i>Lecture Notes in Computer Science</i>. Springer Nature Switzerland. <a href=\"https://doi.org/10.1007/978-3-031-94575-5_4\">https://doi.org/10.1007/978-3-031-94575-5_4</a>"},"year":"2025","place":"Cham"},{"department":[{"_id":"152"}],"series_title":"Verlagsschriftenreihe des Heinz Nixdorf Instituts","user_id":"67161","_id":"63511","language":[{"iso":"eng"}],"extern":"1","type":"dissertation","status":"public","abstract":[{"lang":"eng","text":"Der unsystematische und ineffiziente Umgang mit technischen Änderungen führt zuhohen Personalkosten durch Mehraufwand, einer reduzierten Entscheidungsqualität und kannin Projektfehlschlägen resultieren. Herausforderungen beim Umgang mit technischen Änderungenliegen in der Berücksichtigung relevanter Ursache-Wirkungs-Zusammenhänge, der quantitativen und qualitativen Bewertung der Auswirkungen und der effizienten prozessualen Einbindung. Mithilfe eines modellbasierten Lösungsansatzes lassen sich die Auswirkungen technischer Änderungen schneller bewerten und fundierte Entwicklungsentscheidungen treffen. In der vorliegenden Dissertation wird eine Methodik für die Entwicklung modell-basierter Wirkkettenanalysen zur Bewertung technischer Änderungen beschrieben. Durch die modellbasierte Wirkkettenanalyse können direkt oder indirekt von der Änderung betroffene Modellelemente identifiziert werden. Das Datenmodell wird mithilfe von Abfragesprachen analysiert und die Auswirkungen werden mithilfe von integrierten Metriken quantifiziert. Die Ergebnisse der Wirkkettenanalyse werden in rollenspezifischen Sichten bereitgestellt, wodurch eine bedarfsgerechte Entscheidungsunterstützung gewährleistet wird. Die Validierung anhand von vier industriellen Fallstudien belegt die Praxistauglichkeit der Methodik. Die Methodik verbindet das Änderungsmanagement mit den Vorteilen einer modellbasierten Systementwicklung und bildet somit einen synergetischen neuen Forschungsbereich."},{"lang":"eng","text":"The unsystematic and inefficient handling of technical changes leads to high personnel costs due to additional work, reduced decision-making quality and can result in project failures. The challenges in dealing with technical changes arise in the consideration of relevant cause-and-effect relationships, the quantitative and qualitative assessment of the effects and the efficient process integration. With the help of a model-based solution approach, the effects of technical changes can be assessed more quickly and profound development decisions can be made. This dissertation describes a methodology for the development of model-based effect chain analyses for the evaluation of technical changes. Model-based effect chain analyses can be used to identify model elements that are directly or indirectly affected by the change. The data model is analysed using query languages and the effects are quantified using integrated metrics. The results of the impact chain analysis are provided in role-specific views, which ensures needs-based decision support. The validation based on four industrial case studies demonstrates the practical applicability of the methodology. The methodology combines change management with the advantages of model-based system development and thus forms a synergetic new area of research."}],"volume":432,"author":[{"first_name":"Dominik","last_name":"Wiechel","full_name":"Wiechel, Dominik"}],"date_created":"2026-01-06T20:20:58Z","date_updated":"2026-01-06T20:27:08Z","doi":"10.17619/UNIPB/1-2473","title":"Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen","publication_identifier":{"isbn":["978-3-947647-51-4"],"issn":["2365-4422"]},"publication_status":"published","intvolume":"       432","citation":{"chicago":"Wiechel, Dominik. <i>Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen</i>. Vol. 432. Verlagsschriftenreihe Des Heinz Nixdorf Instituts. Paderborn, 2025. <a href=\"https://doi.org/10.17619/UNIPB/1-2473\">https://doi.org/10.17619/UNIPB/1-2473</a>.","ieee":"D. Wiechel, <i>Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen</i>, vol. 432. Paderborn, 2025.","ama":"Wiechel D. <i>Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen</i>. Vol 432.; 2025. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2473\">10.17619/UNIPB/1-2473</a>","short":"D. Wiechel, Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen, Paderborn, 2025.","bibtex":"@book{Wiechel_2025, place={Paderborn}, series={Verlagsschriftenreihe des Heinz Nixdorf Instituts}, title={Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen}, volume={432}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-2473\">10.17619/UNIPB/1-2473</a>}, author={Wiechel, Dominik}, year={2025}, collection={Verlagsschriftenreihe des Heinz Nixdorf Instituts} }","mla":"Wiechel, Dominik. <i>Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen</i>. 2025, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2473\">10.17619/UNIPB/1-2473</a>.","apa":"Wiechel, D. (2025). <i>Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen</i> (Vol. 432). <a href=\"https://doi.org/10.17619/UNIPB/1-2473\">https://doi.org/10.17619/UNIPB/1-2473</a>"},"place":"Paderborn","year":"2025"},{"citation":{"mla":"Wittkopp, Laura, et al. “Effekte Nachhaltigkeitsbezogener Kontexte Beim Chemielernen.” <i>Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP)</i>, 2025.","bibtex":"@inproceedings{Wittkopp_Pollmeier_Fechner_2025, title={Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen}, booktitle={Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V. (GDCP)}, author={Wittkopp, Laura and Pollmeier, Pascal and Fechner, Sabine}, year={2025} }","short":"L. Wittkopp, P. Pollmeier, S. Fechner, in: Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP), 2025.","apa":"Wittkopp, L., Pollmeier, P., &#38; Fechner, S. (2025). Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen. <i>Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP)</i>. Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik, Frankfurt am Main.","ama":"Wittkopp L, Pollmeier P, Fechner S. Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen. In: <i>Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP)</i>. ; 2025.","chicago":"Wittkopp, Laura, Pascal Pollmeier, and Sabine Fechner. “Effekte Nachhaltigkeitsbezogener Kontexte Beim Chemielernen.” In <i>Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP)</i>, 2025.","ieee":"L. Wittkopp, P. Pollmeier, and S. Fechner, “Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen,” presented at the Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik, Frankfurt am Main, 2025."},"year":"2025","date_created":"2025-12-05T13:41:11Z","author":[{"last_name":"Wittkopp","id":"81147","full_name":"Wittkopp, Laura","first_name":"Laura"},{"first_name":"Pascal","last_name":"Pollmeier","id":"44191","full_name":"Pollmeier, Pascal"},{"first_name":"Sabine","last_name":"Fechner","orcid":"0000-0001-5645-5870","id":"54823","full_name":"Fechner, Sabine"}],"date_updated":"2026-01-06T16:12:06Z","conference":{"end_date":"2025-09-11","location":"Frankfurt am Main","name":"Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik","start_date":"2025-09-08"},"title":"Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen","publication":"Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V. (GDCP)","type":"conference_abstract","status":"public","department":[{"_id":"386"}],"user_id":"81147","_id":"62924","language":[{"iso":"eng"}]},{"author":[{"first_name":"Michael","last_name":"Konopik","full_name":"Konopik, Michael"},{"last_name":"Leyendecker","full_name":"Leyendecker, Sigrid","first_name":"Sigrid"},{"first_name":"Sofya","full_name":"Maslovskaya, Sofya","last_name":"Maslovskaya"},{"first_name":"Sina Ober-Blöbaum","last_name":"Sina Ober-Blöbaum","full_name":"Sina Ober-Blöbaum, Sina Ober-Blöbaum"},{"last_name":"Almagro","full_name":"Almagro, Rodrigo T. Sato Martín de","first_name":"Rodrigo T. Sato Martín de"}],"date_created":"2026-01-06T18:28:18Z","date_updated":"2026-01-06T18:29:15Z","title":"Second order optimality conditions in a new Lagrangian formulation for optimal control problems","citation":{"short":"M. Konopik, S. Leyendecker, S. Maslovskaya, S.O.-B. Sina Ober-Blöbaum, R.T.S.M. de Almagro, ArXiv:2507.06024 (2025).","bibtex":"@article{Konopik_Leyendecker_Maslovskaya_Sina Ober-Blöbaum_Almagro_2025, title={Second order optimality conditions in a new Lagrangian formulation for optimal control problems}, journal={arXiv:2507.06024}, author={Konopik, Michael and Leyendecker, Sigrid and Maslovskaya, Sofya and Sina Ober-Blöbaum, Sina Ober-Blöbaum and Almagro, Rodrigo T. Sato Martín de}, year={2025} }","mla":"Konopik, Michael, et al. “Second Order Optimality Conditions in a New Lagrangian Formulation for Optimal Control Problems.” <i>ArXiv:2507.06024</i>, 2025.","apa":"Konopik, M., Leyendecker, S., Maslovskaya, S., Sina Ober-Blöbaum, S. O.-B., &#38; Almagro, R. T. S. M. de. (2025). Second order optimality conditions in a new Lagrangian formulation for optimal control problems. In <i>arXiv:2507.06024</i>.","ama":"Konopik M, Leyendecker S, Maslovskaya S, Sina Ober-Blöbaum SO-B, Almagro RTSM de. Second order optimality conditions in a new Lagrangian formulation for optimal control problems. <i>arXiv:250706024</i>. Published online 2025.","chicago":"Konopik, Michael, Sigrid Leyendecker, Sofya Maslovskaya, Sina Ober-Blöbaum Sina Ober-Blöbaum, and Rodrigo T. Sato Martín de Almagro. “Second Order Optimality Conditions in a New Lagrangian Formulation for Optimal Control Problems.” <i>ArXiv:2507.06024</i>, 2025.","ieee":"M. Konopik, S. Leyendecker, S. Maslovskaya, S. O.-B. Sina Ober-Blöbaum, and R. T. S. M. de Almagro, “Second order optimality conditions in a new Lagrangian formulation for optimal control problems,” <i>arXiv:2507.06024</i>. 2025."},"year":"2025","user_id":"87909","department":[{"_id":"636"}],"_id":"63510","external_id":{"arxiv":["2507.06024"]},"language":[{"iso":"eng"}],"type":"preprint","publication":"arXiv:2507.06024","status":"public","abstract":[{"lang":"eng","text":"It has been shown recently that optimal control problems with the dynamical constraint given by a second order system admit a regular Lagrangian formulation. This implies that the optimality conditions can be obtained in a new form based on the variational approach. In this paper we extend the first order necessary optimality conditions obtained previously to second order optimality conditions. This results in a complete characterization of the optimality conditions in a new Lagrangian form."}]},{"date_updated":"2026-01-06T18:26:57Z","author":[{"first_name":"Michael","last_name":"Konopik","full_name":"Konopik, Michael"},{"first_name":"Rodrigo","last_name":"T. Sato Martín de Almagro","full_name":"T. Sato Martín de Almagro, Rodrigo"},{"id":"87909","full_name":"Maslovskaya, Sofya","last_name":"Maslovskaya","first_name":"Sofya"},{"id":"16494","full_name":"Ober-Blöbaum, Sina","last_name":"Ober-Blöbaum","first_name":"Sina"},{"first_name":"Sigrid","last_name":"Leyendecker","full_name":"Leyendecker, Sigrid"}],"date_created":"2025-05-05T09:35:31Z","volume":36,"title":"Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term","doi":"10.1007/s00332-025-10229-5","issue":"11","year":"2025","citation":{"apa":"Konopik, M., T. Sato Martín de Almagro, R., Maslovskaya, S., Ober-Blöbaum, S., &#38; Leyendecker, S. (2025). Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term. <i>Journal of Nonlinear Science</i>, <i>36</i>(11). <a href=\"https://doi.org/10.1007/s00332-025-10229-5\">https://doi.org/10.1007/s00332-025-10229-5</a>","short":"M. Konopik, R. T. Sato Martín de Almagro, S. Maslovskaya, S. Ober-Blöbaum, S. Leyendecker, Journal of Nonlinear Science 36 (2025).","bibtex":"@article{Konopik_T. Sato Martín de Almagro_Maslovskaya_Ober-Blöbaum_Leyendecker_2025, title={Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term}, volume={36}, DOI={<a href=\"https://doi.org/10.1007/s00332-025-10229-5\">10.1007/s00332-025-10229-5</a>}, number={11}, journal={Journal of Nonlinear Science}, author={Konopik, Michael and T. Sato Martín de Almagro, Rodrigo and Maslovskaya, Sofya and Ober-Blöbaum, Sina and Leyendecker, Sigrid}, year={2025} }","mla":"Konopik, Michael, et al. “Variational Integrators for a New Lagrangian Approach to Control Affine Systems with a Quadratic Lagrange Term.” <i>Journal of Nonlinear Science</i>, vol. 36, no. 11, 2025, doi:<a href=\"https://doi.org/10.1007/s00332-025-10229-5\">10.1007/s00332-025-10229-5</a>.","ama":"Konopik M, T. Sato Martín de Almagro R, Maslovskaya S, Ober-Blöbaum S, Leyendecker S. Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term. <i>Journal of Nonlinear Science</i>. 2025;36(11). doi:<a href=\"https://doi.org/10.1007/s00332-025-10229-5\">10.1007/s00332-025-10229-5</a>","chicago":"Konopik, Michael, Rodrigo T. Sato Martín de Almagro, Sofya Maslovskaya, Sina Ober-Blöbaum, and Sigrid Leyendecker. “Variational Integrators for a New Lagrangian Approach to Control Affine Systems with a Quadratic Lagrange Term.” <i>Journal of Nonlinear Science</i> 36, no. 11 (2025). <a href=\"https://doi.org/10.1007/s00332-025-10229-5\">https://doi.org/10.1007/s00332-025-10229-5</a>.","ieee":"M. Konopik, R. T. Sato Martín de Almagro, S. Maslovskaya, S. Ober-Blöbaum, and S. Leyendecker, “Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term,” <i>Journal of Nonlinear Science</i>, vol. 36, no. 11, 2025, doi: <a href=\"https://doi.org/10.1007/s00332-025-10229-5\">10.1007/s00332-025-10229-5</a>."},"intvolume":"        36","_id":"59797","user_id":"87909","department":[{"_id":"636"}],"language":[{"iso":"eng"}],"type":"journal_article","publication":"Journal of Nonlinear Science","status":"public"},{"doi":"10.1088/1361-6544/ae1d08","title":"A new Lagrangian approach to optimal control of second-order systems","volume":38,"date_created":"2025-05-05T09:37:50Z","author":[{"first_name":"Michael","full_name":"Konopik, Michael","last_name":"Konopik"},{"last_name":"Leyendecker","full_name":"Leyendecker, Sigrid","first_name":"Sigrid"},{"last_name":"Maslovskaya","full_name":"Maslovskaya, Sofya","id":"87909","first_name":"Sofya"},{"first_name":"Sina","last_name":"Ober-Blöbaum","id":"16494","full_name":"Ober-Blöbaum, Sina"},{"full_name":"T. Sato Martín de Almagro, Rodrigo","last_name":"T. Sato Martín de Almagro","first_name":"Rodrigo"}],"date_updated":"2026-01-06T18:24:40Z","intvolume":"        38","citation":{"ieee":"M. Konopik, S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, and R. T. Sato Martín de Almagro, “A new Lagrangian approach to optimal control of second-order systems,” <i>Nonlinearity</i>, vol. 38, no. 11, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">10.1088/1361-6544/ae1d08</a>.","chicago":"Konopik, Michael, Sigrid Leyendecker, Sofya Maslovskaya, Sina Ober-Blöbaum, and Rodrigo T. Sato Martín de Almagro. “A New Lagrangian Approach to Optimal Control of Second-Order Systems.” <i>Nonlinearity</i> 38, no. 11 (2025). <a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">https://doi.org/10.1088/1361-6544/ae1d08</a>.","ama":"Konopik M, Leyendecker S, Maslovskaya S, Ober-Blöbaum S, T. Sato Martín de Almagro R. A new Lagrangian approach to optimal control of second-order systems. <i>Nonlinearity</i>. 2025;38(11). doi:<a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">10.1088/1361-6544/ae1d08</a>","apa":"Konopik, M., Leyendecker, S., Maslovskaya, S., Ober-Blöbaum, S., &#38; T. Sato Martín de Almagro, R. (2025). A new Lagrangian approach to optimal control of second-order systems. <i>Nonlinearity</i>, <i>38</i>(11). <a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">https://doi.org/10.1088/1361-6544/ae1d08</a>","short":"M. Konopik, S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, R. T. Sato Martín de Almagro, Nonlinearity 38 (2025).","bibtex":"@article{Konopik_Leyendecker_Maslovskaya_Ober-Blöbaum_T. Sato Martín de Almagro_2025, title={A new Lagrangian approach to optimal control of second-order systems}, volume={38}, DOI={<a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">10.1088/1361-6544/ae1d08</a>}, number={11}, journal={Nonlinearity}, author={Konopik, Michael and Leyendecker, Sigrid and Maslovskaya, Sofya and Ober-Blöbaum, Sina and T. Sato Martín de Almagro, Rodrigo}, year={2025} }","mla":"Konopik, Michael, et al. “A New Lagrangian Approach to Optimal Control of Second-Order Systems.” <i>Nonlinearity</i>, vol. 38, no. 11, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6544/ae1d08\">10.1088/1361-6544/ae1d08</a>."},"year":"2025","issue":"11","language":[{"iso":"eng"}],"department":[{"_id":"636"}],"user_id":"87909","_id":"59799","status":"public","publication":"Nonlinearity","type":"journal_article"},{"status":"public","type":"journal_article","article_number":"52729","article_type":"original","_id":"63091","department":[{"_id":"288"},{"_id":"623"}],"user_id":"63231","intvolume":"        33","citation":{"apa":"Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R., Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>, <i>33</i>(25), Article 52729. <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>","short":"S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke, H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33 (2025).","mla":"Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i>, vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","bibtex":"@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et al._2025, title={Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>}, number={2552729}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin and Eigner, Christof and et al.}, year={2025} }","chicago":"Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla, Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i> 33, no. 25 (2025). <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>.","ieee":"S. Babel <i>et al.</i>, “Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths,” <i>Optics Express</i>, vol. 33, no. 25, Art. no. 52729, 2025, doi: <a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","ama":"Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>. 2025;33(25). doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>"},"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","doi":"10.1364/oe.571605","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729"}],"date_updated":"2026-01-07T11:28:35Z","oa":"1","volume":33,"author":[{"full_name":"Babel, Silia","id":"63231","last_name":"Babel","orcid":"https://orcid.org/0000-0002-1568-2580","first_name":"Silia"},{"last_name":"Bollmers","full_name":"Bollmers, Laura","id":"61375","first_name":"Laura"},{"first_name":"Franz","id":"88149","full_name":"Roeder, Franz","last_name":"Roeder"},{"full_name":"Ridder, Werner","id":"63574","last_name":"Ridder","first_name":"Werner"},{"id":"40420","full_name":"Golla, Christian","last_name":"Golla","first_name":"Christian"},{"last_name":"Köthemann","full_name":"Köthemann, Ronja","first_name":"Ronja"},{"first_name":"Bernhard","last_name":"Reineke","id":"29821","full_name":"Reineke, Bernhard"},{"full_name":"Herrmann, Harald","id":"216","last_name":"Herrmann","first_name":"Harald"},{"first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"first_name":"Christof","id":"13244","full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"first_name":"Laura","full_name":"Padberg, Laura","id":"40300","last_name":"Padberg"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"abstract":[{"text":"We present the design and characterization of a guided-wave, bright, and highly frequency non-degenerate parametric down-conversion (PDC) source in thin-film lithium niobate. The source generates photon pairs with wavelengths of 815 nm and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths. We confirm the high quality of the generated single photons by determining a value for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3). Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which is two orders of magnitude higher than sources based on weakly guiding waveguides. The shape of the PDC spectrum and the strong agreement between the effective and nominal bandwidth highlight our high fabrication quality of periodically poled waveguides. The good agreement between the measured and simulated spectral characteristics of our source demonstrates our excellent understanding of the PDC process. Our result is a valuable step towards practical and scalable quantum communication networks as well as photonic quantum computing.","lang":"eng"}],"publication":"Optics Express","language":[{"iso":"eng"}],"year":"2025","issue":"25","title":"Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths","publisher":"Optica Publishing Group","date_created":"2025-12-15T07:20:36Z"},{"title":"Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate","publisher":"Walter de Gruyter GmbH","date_created":"2025-12-01T08:45:07Z","year":"2025","quality_controlled":"1","language":[{"iso":"eng"}],"abstract":[{"text":"Periodically poled thin-film lithium niobate (TFLN) crystals are the fundamental building block for highly-efficient quantum light sources and frequency converters. The efficiency of these devices is strongly dependent on the interaction length between the light and the nonlinear material, scaling quadratically with this parameter. Nevertheless, the fabrication of long, continuously poled areas in TFLN remains challenging, the length of continuously poled areas rarely exceeds 10 mm. In this work, we demonstrate a significant progress in this field achieving the periodic poling of continuous poled areas of 70 mm length with a 3 μm poling period and a close to 50 % duty cycle. We compare two poling electrode design approaches to fabricate long, continuous poled areas. The first approach involves the poling of a single, continuous 70 mm long electrode. The second utilize a segmented approach including the poling of more than 20 individual sections forming together a 70 mm long poling area with no stitching errors. While the continuous electrode allows for faster fabrication, the segmented approach allows to individually optimize the poling resulting in less duty cycle variation. A detailed analysis of the periodic poling results reveals that the results of both are consistent with previously reported poling outcomes for shorter devices. Thus, we demonstrate wafer-scale periodic poling exceeding chiplet-size without any loss in the periodic poling quality. Our work presents a key step towards highly-efficient, narrow-bandwidth and low-pump power nonlinear optical devices.","lang":"eng"}],"publication":"Nanophotonics","doi":"10.1515/nanoph-2025-0461","main_file_link":[{"url":"https://doi.org/10.1515/nanoph-2025-0461","open_access":"1"}],"date_updated":"2026-01-07T12:06:29Z","oa":"1","volume":14,"author":[{"last_name":"Bollmers","id":"61375","full_name":"Bollmers, Laura","first_name":"Laura"},{"last_name":"Spiegelberg","full_name":"Spiegelberg, Noah","first_name":"Noah"},{"first_name":"Michael","id":"22501","full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof"},{"first_name":"Laura","last_name":"Padberg","id":"40300","full_name":"Padberg, Laura"},{"first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn"}],"page":"4761","intvolume":"        14","citation":{"bibtex":"@article{Bollmers_Spiegelberg_Rüsing_Eigner_Padberg_Silberhorn_2025, title={Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate}, volume={14}, DOI={<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Bollmers, Laura and Spiegelberg, Noah and Rüsing, Michael and Eigner, Christof and Padberg, Laura and Silberhorn, Christine}, year={2025}, pages={4761} }","mla":"Bollmers, Laura, et al. “Segmented Finger Electrodes to Optimize Ultra-Long Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” <i>Nanophotonics</i>, vol. 14, Walter de Gruyter GmbH, 2025, p. 4761, doi:<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>.","short":"L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, C. Silberhorn, Nanophotonics 14 (2025) 4761.","apa":"Bollmers, L., Spiegelberg, N., Rüsing, M., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate. <i>Nanophotonics</i>, <i>14</i>, 4761. <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">https://doi.org/10.1515/nanoph-2025-0461</a>","ama":"Bollmers L, Spiegelberg N, Rüsing M, Eigner C, Padberg L, Silberhorn C. Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate. <i>Nanophotonics</i>. 2025;14:4761. doi:<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>","ieee":"L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, and C. Silberhorn, “Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate,” <i>Nanophotonics</i>, vol. 14, p. 4761, 2025, doi: <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>.","chicago":"Bollmers, Laura, Noah Spiegelberg, Michael Rüsing, Christof Eigner, Laura Padberg, and Christine Silberhorn. “Segmented Finger Electrodes to Optimize Ultra-Long Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” <i>Nanophotonics</i> 14 (2025): 4761. <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">https://doi.org/10.1515/nanoph-2025-0461</a>."},"publication_identifier":{"issn":["2192-8606","2192-8614"]},"publication_status":"published","article_type":"original","_id":"62713","department":[{"_id":"15"},{"_id":"288"},{"_id":"623"}],"user_id":"22501","status":"public","type":"journal_article"},{"citation":{"ama":"Hagengruber RE. Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793). <i>ZDPE</i>. 2025;3.","ieee":"R. E. Hagengruber, “Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793),” <i>ZDPE</i>, vol. 3, 2025.","chicago":"Hagengruber, Ruth Edith. “Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793).” <i>ZDPE</i> 3 (2025).","bibtex":"@article{Hagengruber_2025, title={Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793)}, volume={3}, journal={ZDPE}, publisher={Bettina Bussmann und Vanessa Albus}, author={Hagengruber, Ruth Edith}, year={2025} }","mla":"Hagengruber, Ruth Edith. “Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793).” <i>ZDPE</i>, vol. 3, Bettina Bussmann und Vanessa Albus, 2025.","short":"R.E. Hagengruber, ZDPE 3 (2025).","apa":"Hagengruber, R. E. (2025). Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793). <i>ZDPE</i>, <i>3</i>."},"intvolume":"         3","year":"2025","publication_status":"published","title":"Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig\". Das politische Meisterstücke der Olympe de Gouges (1748-1793)","date_created":"2026-01-07T12:35:34Z","author":[{"orcid":"https://orcid.org/0000-0003-3360-6335","last_name":"Hagengruber","full_name":"Hagengruber, Ruth Edith","id":"198","first_name":"Ruth Edith"}],"volume":3,"date_updated":"2026-01-07T12:35:42Z","publisher":"Bettina Bussmann und Vanessa Albus","status":"public","type":"journal_article","publication":"ZDPE","language":[{"iso":"ger"}],"user_id":"91827","department":[{"_id":"519"}],"_id":"63518"},{"status":"public","abstract":[{"lang":"eng","text":"Recommendation systems are essential for delivering personalized content across e-commerce and streaming services. However, traditional methods often fail in cold-start scenarios where new items lack prior interactions. Recent advances in large language models (LLMs) offer a promising alternative. In this paper, we adopt the retrieve-and-recommend framework and propose to fine-tune the LLM jointly on warm-and cold-start next-item recommendation tasks, thus, mitigating the need for separate models for both item types. We computationally compare zero-shot prompting, in-context learning, and fine-tuning using the same LLM backbone, and benchmark them against strong PLM-based baselines. Our findings provide practical insights into the trade-offs between accuracy and computational cost of these methods for next-item recommendation. To enhance reproducibility, we release the source code under https://github. com/HayaHalimeh/LLMs-For-Next-Item-Recommendation.git."}],"publication":"International Conference on Information Systems Development","type":"conference","language":[{"iso":"eng"}],"department":[{"_id":"195"},{"_id":"196"}],"user_id":"87673","_id":"63524","citation":{"short":"H. Halimeh, F. Freese, O. Müller, in: International Conference on Information Systems Development, University of Gdansk, Department of Business Informatics &#38; University of Belgrade, Faculty of Organizational Sciences, 2025.","mla":"Halimeh, Haya, et al. “LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning.” <i>International Conference on Information Systems Development</i>, University of Gdansk, Department of Business Informatics &#38; University of Belgrade, Faculty of Organizational Sciences, 2025, doi:<a href=\"https://doi.org/10.62036/isd.2025.68\">10.62036/isd.2025.68</a>.","bibtex":"@inproceedings{Halimeh_Freese_Müller_2025, title={LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning}, DOI={<a href=\"https://doi.org/10.62036/isd.2025.68\">10.62036/isd.2025.68</a>}, booktitle={International Conference on Information Systems Development}, publisher={University of Gdansk, Department of Business Informatics &#38; University of Belgrade, Faculty of Organizational Sciences}, author={Halimeh, Haya and Freese, Florian and Müller, Oliver}, year={2025} }","apa":"Halimeh, H., Freese, F., &#38; Müller, O. (2025). LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning. <i>International Conference on Information Systems Development</i>. <a href=\"https://doi.org/10.62036/isd.2025.68\">https://doi.org/10.62036/isd.2025.68</a>","ama":"Halimeh H, Freese F, Müller O. LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning. In: <i>International Conference on Information Systems Development</i>. University of Gdansk, Department of Business Informatics &#38; University of Belgrade, Faculty of Organizational Sciences; 2025. doi:<a href=\"https://doi.org/10.62036/isd.2025.68\">10.62036/isd.2025.68</a>","ieee":"H. Halimeh, F. Freese, and O. Müller, “LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning,” 2025, doi: <a href=\"https://doi.org/10.62036/isd.2025.68\">10.62036/isd.2025.68</a>.","chicago":"Halimeh, Haya, Florian Freese, and Oliver Müller. “LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning.” In <i>International Conference on Information Systems Development</i>. University of Gdansk, Department of Business Informatics &#38; University of Belgrade, Faculty of Organizational Sciences, 2025. <a href=\"https://doi.org/10.62036/isd.2025.68\">https://doi.org/10.62036/isd.2025.68</a>."},"year":"2025","publication_identifier":{"issn":["2938-5202"]},"publication_status":"published","doi":"10.62036/isd.2025.68","main_file_link":[{"open_access":"1"}],"title":"LLMs For Warm and Cold Next-Item Recommendation: A Comparative Study across Zero-Shot Prompting, In-Context Learning and Fine-Tuning","author":[{"id":"87673","full_name":"Halimeh, Haya","last_name":"Halimeh","first_name":"Haya"},{"first_name":"Florian","full_name":"Freese, Florian","last_name":"Freese"},{"first_name":"Oliver","full_name":"Müller, Oliver","last_name":"Müller"}],"date_created":"2026-01-07T13:36:53Z","oa":"1","date_updated":"2026-01-07T13:47:43Z","publisher":"University of Gdansk, Department of Business Informatics & University of Belgrade, Faculty of Organizational Sciences"},{"language":[{"iso":"eng"}],"department":[{"_id":"195"},{"_id":"196"}],"user_id":"87673","_id":"63523","status":"public","abstract":[{"text":"Data spaces have become a strategic pillar of Europe's digital agenda, enabling sovereign, legally compliant data sharing within decentralized ecosystems. As data space initiatives evolve, personalized recommendations are increasingly recognized as key use cases. However, traditional recommendation approaches typically rely on centralized aggregation of user behavior data-directly conflicting with the core ethos of data spaces: sovereignty, privacy, and trust. Federated recommendation systems offer a promising alternative by training models locally and exchanging only intermediate parameters to build a global model. Despite this potential, the integration of federated recommendation techniques and data space architectures remains largely underexplored in research and practice. This paper addresses this gap by designing and evaluating a prototype of a federated recommendation system specifically tailored for data spaces and compliant with their underlying infrastructure. Our findings highlight the viability of developing privacy-preserving, collaborative recommendation systems within data spaces, and contribute to the broader adoption of AI across these emerging ecosystems.","lang":"eng"}],"publication":"2025 27th International Conference on Business Informatics (CBI)","type":"conference","doi":"10.1109/cbi68102.2025.00019","main_file_link":[{"open_access":"1"}],"title":"Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces","date_created":"2026-01-07T13:34:02Z","author":[{"last_name":"Halimeh","full_name":"Halimeh, Haya","id":"87673","first_name":"Haya"},{"first_name":"Philipp","last_name":"zur Heiden","full_name":"zur Heiden, Philipp","id":"64394"}],"publisher":"IEEE","oa":"1","date_updated":"2026-01-07T13:49:45Z","citation":{"apa":"Halimeh, H., &#38; zur Heiden, P. (2025). Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces. <i>2025 27th International Conference on Business Informatics (CBI)</i>. <a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">https://doi.org/10.1109/cbi68102.2025.00019</a>","mla":"Halimeh, Haya, and Philipp zur Heiden. “Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces.” <i>2025 27th International Conference on Business Informatics (CBI)</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">10.1109/cbi68102.2025.00019</a>.","short":"H. Halimeh, P. zur Heiden, in: 2025 27th International Conference on Business Informatics (CBI), IEEE, 2025.","bibtex":"@inproceedings{Halimeh_zur Heiden_2025, title={Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces}, DOI={<a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">10.1109/cbi68102.2025.00019</a>}, booktitle={2025 27th International Conference on Business Informatics (CBI)}, publisher={IEEE}, author={Halimeh, Haya and zur Heiden, Philipp}, year={2025} }","ama":"Halimeh H, zur Heiden P. Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces. In: <i>2025 27th International Conference on Business Informatics (CBI)</i>. IEEE; 2025. doi:<a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">10.1109/cbi68102.2025.00019</a>","chicago":"Halimeh, Haya, and Philipp zur Heiden. “Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces.” In <i>2025 27th International Conference on Business Informatics (CBI)</i>. IEEE, 2025. <a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">https://doi.org/10.1109/cbi68102.2025.00019</a>.","ieee":"H. Halimeh and P. zur Heiden, “Preserving Sovereignty and Privacy for Personalization: Designing a Federated Recommendation System for Data Spaces,” 2025, doi: <a href=\"https://doi.org/10.1109/cbi68102.2025.00019\">10.1109/cbi68102.2025.00019</a>."},"year":"2025","publication_status":"published"},{"conference":{"start_date":"2025-09-26","name":" The Second International Workshop on Recommender Systems for Sustainability and Social Good, RecSoGood 2025","location":"Prague, Czech Republic"},"doi":"10.1007/978-3-032-13342-7","main_file_link":[{"open_access":"1","url":"https://link.springer.com/book/10.1007/978-3-032-13342-7"}],"title":"Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations","author":[{"full_name":"Halimeh, Haya","id":"87673","last_name":"Halimeh","first_name":"Haya"},{"first_name":"Oliver","full_name":"Müller, Oliver","id":"72849","last_name":"Müller"}],"date_created":"2026-01-07T13:40:05Z","date_updated":"2026-01-07T13:46:50Z","oa":"1","citation":{"mla":"Halimeh, Haya, and Oliver Müller. <i>Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations</i>. 2025, doi:<a href=\"https://doi.org/10.1007/978-3-032-13342-7\">10.1007/978-3-032-13342-7</a>.","bibtex":"@inproceedings{Halimeh_Müller_2025, title={Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations}, DOI={<a href=\"https://doi.org/10.1007/978-3-032-13342-7\">10.1007/978-3-032-13342-7</a>}, author={Halimeh, Haya and Müller, Oliver}, year={2025} }","short":"H. Halimeh, O. Müller, in: 2025.","apa":"Halimeh, H., &#38; Müller, O. (2025). <i>Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations</i>.  The Second International Workshop on Recommender Systems for Sustainability and Social Good, RecSoGood 2025, Prague, Czech Republic. <a href=\"https://doi.org/10.1007/978-3-032-13342-7\">https://doi.org/10.1007/978-3-032-13342-7</a>","ieee":"H. Halimeh and O. Müller, “Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations,” presented at the  The Second International Workshop on Recommender Systems for Sustainability and Social Good, RecSoGood 2025, Prague, Czech Republic, 2025, doi: <a href=\"https://doi.org/10.1007/978-3-032-13342-7\">10.1007/978-3-032-13342-7</a>.","chicago":"Halimeh, Haya, and Oliver Müller. “Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations,” 2025. <a href=\"https://doi.org/10.1007/978-3-032-13342-7\">https://doi.org/10.1007/978-3-032-13342-7</a>.","ama":"Halimeh H, Müller O. Towards Greener Choices: Decision Information Nudging for Sustainability-Aware Recommender Explanations. In: ; 2025. doi:<a href=\"https://doi.org/10.1007/978-3-032-13342-7\">10.1007/978-3-032-13342-7</a>"},"year":"2025","language":[{"iso":"eng"}],"department":[{"_id":"195"},{"_id":"196"}],"user_id":"87673","_id":"63525","status":"public","abstract":[{"text":"Recommender systems (RS) can support sustainable development by steering users toward more sustainable choices. Sustainability-aware explanations represent one avenue for contributing to this goal by foregrounding the environmental and social aspects of the recommended products or services. This paper advances the line of research on sustainability-aware explanations by integrating nudging mechanisms into their design and by evaluating their effectiveness through a randomized between-subjects online vignette experiment across two item domains (). Our findings offer actionable design guidelines for building RS that foster sustainability-aware decision making and enrich the empirical foundation for impact-oriented research on explanation in RS.\r\n","lang":"eng"}],"type":"conference"}]