--- _id: '64616' abstract: - lang: eng text: The circular economy offers decisive advantages over the currently prevalent linear economy in industry. Firstly, the reuse of products, individual parts and material reduces the need for new production or generation and the associated consumption of energy and resources. Secondly, it helps to avoid the generation of waste. Early consideration of circular economic principles in product development processes is essential to specifically promote reuse, reparability and recycling. Efficient recycling of assemblies requires well-defined strategies. However, various challenges hinder the efficiency of technical recycling processes in industrial applications. This paper presents an Ishikawa (fishbone) diagram-based approach to systematically identify and categorize these influences. The method is implemented within an industrial framework, highlighting key obstacles such as material composition, design constraints, use of technology, framework conditions, economic limitations and regulatory challenges. By applying a scenario analysis, this approach examines potential future developments and their impact on recycling-oriented design choices. This helps to identify critical influencing factors and supports the development of resilient and sustainable industrial practices. This framework will serve as the foundation for developing an automated approach to circular design, enabling industries to more effectively integrate sustainability into their processes and adapt to changing environmental demands. author: - first_name: Katharina full_name: Rohde, Katharina id: '70143' last_name: Rohde orcid: 0009-0000-5738-7304 - first_name: Barbara Fernandez full_name: Gonzalez, Barbara Fernandez last_name: Gonzalez - first_name: Finn Lukas full_name: Budde, Finn Lukas id: '74585' last_name: Budde - first_name: Manuel full_name: Ott, Manuel id: '44204' last_name: Ott - first_name: Iryna full_name: Mozgova, Iryna id: '95903' last_name: Mozgova - first_name: Alain Alonso full_name: Mendibe, Alain Alonso last_name: Mendibe citation: ama: 'Rohde K, Gonzalez BF, Budde FL, Ott M, Mozgova I, Mendibe AA. Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application. In: Kohl H, Seliger G, Dietrich F, Campana G, eds. Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing. Vol 1. Lecture Notes in Mechanical Engineering. Springer Nature Switzerland AG.' apa: 'Rohde, K., Gonzalez, B. F., Budde, F. L., Ott, M., Mozgova, I., & Mendibe, A. A. (n.d.). Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application. In H. Kohl, G. Seliger, F. Dietrich, & G. Campana (Eds.), Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing (Vol. 1). Springer Nature Switzerland AG.' bibtex: '@inproceedings{Rohde_Gonzalez_Budde_Ott_Mozgova_Mendibe, series={Lecture Notes in Mechanical Engineering}, title={Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application}, volume={1}, booktitle={Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing}, publisher={Springer Nature Switzerland AG}, author={Rohde, Katharina and Gonzalez, Barbara Fernandez and Budde, Finn Lukas and Ott, Manuel and Mozgova, Iryna and Mendibe, Alain Alonso}, editor={Kohl, Holger and Seliger, Günther and Dietrich, Franz and Campana, Giampaolo}, collection={Lecture Notes in Mechanical Engineering} }' chicago: 'Rohde, Katharina, Barbara Fernandez Gonzalez, Finn Lukas Budde, Manuel Ott, Iryna Mozgova, and Alain Alonso Mendibe. “Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application.” In Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing, edited by Holger Kohl, Günther Seliger, Franz Dietrich, and Giampaolo Campana, Vol. 1. Lecture Notes in Mechanical Engineering. Springer Nature Switzerland AG, n.d.' ieee: 'K. Rohde, B. F. Gonzalez, F. L. Budde, M. Ott, I. Mozgova, and A. A. Mendibe, “Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application,” in Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing, Bologna, Italy, vol. 1.' mla: 'Rohde, Katharina, et al. “Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application.” Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing, edited by Holger Kohl et al., vol. 1, Springer Nature Switzerland AG.' short: 'K. Rohde, B.F. Gonzalez, F.L. Budde, M. Ott, I. Mozgova, A.A. Mendibe, in: H. Kohl, G. Seliger, F. Dietrich, G. Campana (Eds.), Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing, Springer Nature Switzerland AG, n.d.' conference: end_date: 2025-09-12 location: Bologna, Italy name: 21st Global Conference on Sustainable Manufacturing (GCSM 2025) start_date: 2025-09-10 date_created: 2026-02-24T13:36:06Z date_updated: 2026-02-24T14:05:50Z ddc: - '620' department: - _id: '741' editor: - first_name: Holger full_name: Kohl, Holger last_name: Kohl - first_name: Günther full_name: Seliger, Günther last_name: Seliger - first_name: Franz full_name: Dietrich, Franz last_name: Dietrich - first_name: Giampaolo full_name: Campana, Giampaolo last_name: Campana file: - access_level: closed content_type: application/pdf creator: kathiroh date_created: 2026-02-24T13:33:47Z date_updated: 2026-02-24T13:33:47Z file_id: '64617' file_name: GCSM_2025_Rohde_updated.pdf file_size: 333257 relation: main_file success: 1 file_date_updated: 2026-02-24T13:33:47Z has_accepted_license: '1' intvolume: ' 1' language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing publication_status: inpress publisher: Springer Nature Switzerland AG quality_controlled: '1' series_title: Lecture Notes in Mechanical Engineering status: public title: 'Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application' type: conference user_id: '70143' volume: 1 year: '2025' ... --- _id: '63830' abstract: - lang: eng text: " This study investigates the effect of dispersion gas (DG) flow on the formation and properties of maghemite (γ-Fe2O3) nanoparticles using standardized SpraySyn burners (SS1 and SS2). Several diagnostics were employed to characterize the spray and nanoparticles. \r\nIncreasing DG flow (6 - 12 slm) results in smaller droplet sizes (DS), cooler flame temperatures, shorter high-temperature droplet/particle residence times, and smaller agglomerates in the size range of 5 - 12 nm with narrower primary particle size distribution, corresponding to higher mass fractal dimensions, as supported by TEM and SMPS analysis, resulting in more compact agglomerates. BET and TEM confirmed decreasing primary particle sizes with increasing DG flow. Raman and XRD analyses predominantly identified maghemite, which shows a bimodal distribution of crystallite sizes, while SS1 samples have a greater proportion of larger crystallites.\r\nThe self-preserving size distributions of agglomerates with a geometric standard deviation of 1.5 are reached faster with increasing DG flow. The barrier effect of DG observed in SS1 leads to slower droplet combustion kinetics, higher temperatures, and delayed precursor release, which, along with downstream flow recirculation, result in significantly higher agglomeration rates outside the visible flame. SS2 demonstrates improved atomization, more stable flames, and finer, uniform nanoparticles with less carbonaceous residues (CR). Conversely, SS1 showed broader DS distributions and higher CR levels on the γ-Fe2O3 surface, especially at higher DG flow.\r\nThis work highlights the essential role of DG flow and nozzle geometry in controlling droplet evaporation, flame stability, and nanoparticle growth, offering insights for optimizing SFS and validating numerical models.\r\n" article_number: '121992' article_type: original author: - first_name: Orlando full_name: Massopo, Orlando last_name: Massopo - first_name: Ricardo full_name: Tischendorf, Ricardo last_name: Tischendorf - first_name: Munko full_name: Gonchikzhapov, Munko last_name: Gonchikzhapov - first_name: Tina full_name: Kasper, Tina last_name: Kasper - first_name: Peter full_name: Augustin, Peter last_name: Augustin - first_name: Burak full_name: Özer, Burak last_name: Özer - first_name: Manuel full_name: Reddemann, Manuel last_name: Reddemann - first_name: Reinhold full_name: Kneer, Reinhold last_name: Kneer - first_name: Mohammed-Ali full_name: Sheikh, Mohammed-Ali last_name: Sheikh - first_name: Aydan Akyildiz full_name: Mert, Aydan Akyildiz last_name: Mert - first_name: Hartmut full_name: Wiggers, Hartmut last_name: Wiggers - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim last_name: Schmid citation: ama: Massopo O, Tischendorf R, Gonchikzhapov M, et al. Influence of dispersion gas flow on the spray characteristics and γ-Fe2O3 nanoparticles formation and properties in reference SpraySyn burners. Powder Technology. 2025;470. doi:10.1016/j.powtec.2025.121992 apa: Massopo, O., Tischendorf, R., Gonchikzhapov, M., Kasper, T., Augustin, P., Özer, B., Reddemann, M., Kneer, R., Sheikh, M.-A., Mert, A. A., Wiggers, H., & Schmid, H.-J. (2025). Influence of dispersion gas flow on the spray characteristics and γ-Fe2O3 nanoparticles formation and properties in reference SpraySyn burners. Powder Technology, 470, Article 121992. https://doi.org/10.1016/j.powtec.2025.121992 bibtex: '@article{Massopo_Tischendorf_Gonchikzhapov_Kasper_Augustin_Özer_Reddemann_Kneer_Sheikh_Mert_et al._2025, title={Influence of dispersion gas flow on the spray characteristics and γ-Fe2O3 nanoparticles formation and properties in reference SpraySyn burners}, volume={470}, DOI={10.1016/j.powtec.2025.121992}, number={121992}, journal={Powder Technology}, publisher={Elsevier BV}, author={Massopo, Orlando and Tischendorf, Ricardo and Gonchikzhapov, Munko and Kasper, Tina and Augustin, Peter and Özer, Burak and Reddemann, Manuel and Kneer, Reinhold and Sheikh, Mohammed-Ali and Mert, Aydan Akyildiz and et al.}, year={2025} }' chicago: Massopo, Orlando, Ricardo Tischendorf, Munko Gonchikzhapov, Tina Kasper, Peter Augustin, Burak Özer, Manuel Reddemann, et al. “Influence of Dispersion Gas Flow on the Spray Characteristics and γ-Fe2O3 Nanoparticles Formation and Properties in Reference SpraySyn Burners.” Powder Technology 470 (2025). https://doi.org/10.1016/j.powtec.2025.121992. ieee: 'O. Massopo et al., “Influence of dispersion gas flow on the spray characteristics and γ-Fe2O3 nanoparticles formation and properties in reference SpraySyn burners,” Powder Technology, vol. 470, Art. no. 121992, 2025, doi: 10.1016/j.powtec.2025.121992.' mla: Massopo, Orlando, et al. “Influence of Dispersion Gas Flow on the Spray Characteristics and γ-Fe2O3 Nanoparticles Formation and Properties in Reference SpraySyn Burners.” Powder Technology, vol. 470, 121992, Elsevier BV, 2025, doi:10.1016/j.powtec.2025.121992. short: O. Massopo, R. Tischendorf, M. Gonchikzhapov, T. Kasper, P. Augustin, B. Özer, M. Reddemann, R. Kneer, M.-A. Sheikh, A.A. Mert, H. Wiggers, H.-J. Schmid, Powder Technology 470 (2025). date_created: 2026-02-02T11:41:04Z date_updated: 2026-02-25T07:45:44Z doi: 10.1016/j.powtec.2025.121992 intvolume: ' 470' keyword: - Spray flame synthesis - iron oxide nanoparticle - SpraySyn burner - Dispersion gas - Coaxial atomization - HiaT-SMPS language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: Powder Technology publication_identifier: issn: - 0032-5910 publication_status: published publisher: Elsevier BV status: public title: Influence of dispersion gas flow on the spray characteristics and γ-Fe2O3 nanoparticles formation and properties in reference SpraySyn burners type: journal_article user_id: '98419' volume: 470 year: '2025' ... --- _id: '64770' author: - first_name: Matthieu full_name: Pinaud, Matthieu last_name: Pinaud citation: ama: Pinaud M. Manifold of Mappings and Regularity Properties of Half-Lie Groups.; 2025. doi:10.17619/UNIPB/1-2211 apa: Pinaud, M. (2025). Manifold of mappings and regularity properties of half-Lie groups. https://doi.org/10.17619/UNIPB/1-2211 bibtex: '@book{Pinaud_2025, title={Manifold of mappings and regularity properties of half-Lie groups}, DOI={10.17619/UNIPB/1-2211}, author={Pinaud, Matthieu}, year={2025} }' chicago: Pinaud, Matthieu. Manifold of Mappings and Regularity Properties of Half-Lie Groups, 2025. https://doi.org/10.17619/UNIPB/1-2211. ieee: M. Pinaud, Manifold of mappings and regularity properties of half-Lie groups. 2025. mla: Pinaud, Matthieu. Manifold of Mappings and Regularity Properties of Half-Lie Groups. 2025, doi:10.17619/UNIPB/1-2211. short: M. Pinaud, Manifold of Mappings and Regularity Properties of Half-Lie Groups, 2025. date_created: 2026-02-26T21:58:22Z date_updated: 2026-02-26T21:58:36Z department: - _id: '10' - _id: '87' - _id: '93' doi: 10.17619/UNIPB/1-2211 language: - iso: eng main_file_link: - open_access: '1' url: https://nbn-resolving.org/urn:nbn:de:hbz:466:2-54221 oa: '1' status: public supervisor: - first_name: Helge full_name: Glöckner, Helge id: '178' last_name: Glöckner title: Manifold of mappings and regularity properties of half-Lie groups type: dissertation user_id: '178' year: '2025' ... --- _id: '61149' abstract: - lang: eng 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. author: - first_name: Alrik full_name: Dargel, Alrik id: '114764' last_name: Dargel - first_name: Benjamin full_name: Gröger, Benjamin last_name: Gröger - first_name: Malte Christian full_name: Schlichter, Malte Christian id: '61977' last_name: Schlichter - first_name: Johannes full_name: Gerritzen, Johannes id: '105344' last_name: Gerritzen orcid: 0000-0002-0169-8602 - first_name: Daniel full_name: Köhler, Daniel id: '83408' last_name: Köhler - 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 full_name: Kupfer, Robert last_name: Kupfer citation: 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. Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025). FEUP; 2025. doi:10.24840/978-972-752-323-8' apa: 'Dargel, A., Gröger, B., Schlichter, M. C., Gerritzen, J., Köhler, D., Meschut, G., Gude, M., & Kupfer, R. (2025). LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION. In J. F. S. Gomes & S. A. Meguid (Eds.), Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025). FEUP. https://doi.org/10.24840/978-972-752-323-8' 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={10.24840/978-972-752-323-8}, 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} }' 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 Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025), edited by J.F. Silva Gomes and Shaker A. Meguid. Porto: FEUP, 2025. https://doi.org/10.24840/978-972-752-323-8.' ieee: 'A. Dargel et al., “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION,” in Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025), Porto, 2025, doi: 10.24840/978-972-752-323-8.' mla: 'Dargel, Alrik, et al. “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.” Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025), edited by J.F. Silva Gomes and Shaker A. Meguid, FEUP, 2025, doi:10.24840/978-972-752-323-8.' 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.' conference: end_date: 2025-07-18 location: Porto name: 8th International Conference on Integrity-Reliability-Failure (IRF2025) start_date: 2025-07-15 date_created: 2025-09-08T11:52:45Z date_updated: 2026-02-27T06:45:17Z doi: 10.24840/978-972-752-323-8 editor: - first_name: J.F. Silva full_name: Gomes, J.F. Silva last_name: Gomes - first_name: Shaker A. full_name: Meguid, Shaker A. last_name: Meguid keyword: - self-piercing riveting - computed tomography - thermoplastic composites - process-structure-interaction language: - iso: eng 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 oa: '1' place: Porto project: - _id: '133' name: TRR 285 - Project Area C - _id: '148' name: TRR 285 - Subproject C04 - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '131' name: TRR 285 - Project Area A - _id: '137' name: TRR 285 - Subproject A03 - _id: '135' name: TRR 285 - Subproject A01 publication: Proceedings of the 8th International Conference on Integrity-Reliability-Failure (IRF2025) publication_identifier: isbn: - '9789727523238' publication_status: published publisher: FEUP status: public title: 'LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION' type: conference user_id: '105344' year: '2025' ... --- _id: '64793' abstract: - lang: eng text: The article explores the role of teachers in self-directed songwriting in school music based on the informal learning approach. It investigates a didactic design that was implemented in six schools and was empirically researched utilizing si-tuational analysis. Based on tensions, that emerge due to conflicting expectations, it can be shown, that the teacher's role extends beyond the dichotomy of directive instruction versus open facilitation. Instead, it encompasses an interplay of six divergent roles which are discussed in their positions in relation to each other. These considerations enrich the understanding of teaching practices in popular music education, emphasizing the redefinition of teacher-student relationships for song-writing in school music. author: - first_name: Marc full_name: Godau, Marc id: '98877' last_name: Godau - first_name: Julia full_name: Barreiro, Julia last_name: Barreiro - first_name: Katharina full_name: Hermann, Katharina last_name: Hermann - first_name: Timo full_name: Neuhausen, Timo id: '99991' last_name: Neuhausen orcid: 0000-0002-8262-767X - first_name: Dominik full_name: Maxelon, Dominik last_name: Maxelon - first_name: Verena full_name: Weidner, Verena last_name: Weidner citation: ama: 'Godau M, Barreiro J, Hermann K, Neuhausen T, Maxelon D, Weidner V. “Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht. In: Frey-Konrad U, Hofbauer VC, Blanchard O, Bugiel L, eds. 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education. Waxmann; 2025. doi:10.31244/9783818850715.13' apa: Godau, M., Barreiro, J., Hermann, K., Neuhausen, T., Maxelon, D., & Weidner, V. (2025). “Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht. In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, & L. Bugiel (Eds.), 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education. Waxmann. https://doi.org/10.31244/9783818850715.13 bibtex: '@inbook{Godau_Barreiro_Hermann_Neuhausen_Maxelon_Weidner_2025, title={“Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht}, DOI={10.31244/9783818850715.13}, booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education}, publisher={Waxmann}, author={Godau, Marc and Barreiro, Julia and Hermann, Katharina and Neuhausen, Timo and Maxelon, Dominik and Weidner, Verena}, editor={Frey-Konrad, Ute and Hofbauer, Viola Cäcilia and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }' chicago: Godau, Marc, Julia Barreiro, Katharina Hermann, Timo Neuhausen, Dominik Maxelon, and Verena Weidner. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht.” In 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, edited by Ute Frey-Konrad, Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel. Waxmann, 2025. https://doi.org/10.31244/9783818850715.13. ieee: M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, and V. Weidner, “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht,” in 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025. mla: Godau, Marc, et al. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht.” 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, edited by Ute Frey-Konrad et al., Waxmann, 2025, doi:10.31244/9783818850715.13. short: 'M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, V. Weidner, in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel (Eds.), 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, Waxmann, 2025.' date_created: 2026-02-28T09:50:45Z date_updated: 2026-02-28T15:29:25Z department: - _id: '131' - _id: '36' - _id: '129' - _id: '540' doi: 10.31244/9783818850715.13 editor: - first_name: Ute full_name: Frey-Konrad, Ute last_name: Frey-Konrad - first_name: Viola Cäcilia full_name: Hofbauer, Viola Cäcilia last_name: Hofbauer - first_name: Olivier full_name: Blanchard, Olivier last_name: Blanchard - first_name: Lukas full_name: Bugiel, Lukas last_name: Bugiel language: - iso: ger main_file_link: - open_access: '1' oa: '1' publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education publication_identifier: isbn: - '9783818800710' publication_status: published publisher: Waxmann quality_controlled: '1' status: public title: '"Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?" Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht' type: book_chapter user_id: '99991' year: '2025' ... --- _id: '64792' abstract: - lang: eng text: The role of institutionalized standards for the hybridization of musical practices. On the socio-materiality of songwriting-producing in the bedroom studio This study examines the socio-materiality of hybrid music practices in bedroom studios, focusing on the interplay between traditional music education institutions and YouTube education. A single case situational analysis reveals how standardized instrumental and music production practices are combined to form a hybrid practice. It shows that traditional music education institutions, such as music schools and conservatories, specialize in the selection of chord tones, while You-Tube videos focus on sound design. Using an actor-network theory approach, the study demonstrates the permeability of informal and institutional learning spaces. The findings suggest that songwriting-producing is not simply a sum of different practices, but rather a process of negotiation and compromise between different standards and goals, as well as the distribution of practice between humans and technology. author: - first_name: Timo full_name: Neuhausen, Timo id: '99991' last_name: Neuhausen orcid: 0000-0002-8262-767X citation: ama: 'Neuhausen T. Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio. In: Frey-Konrad U, Hofbauer VC, Blanchard O, Bugiel L, eds. 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education. Waxmann; 2025. doi:10.31244/9783818850715.19' apa: Neuhausen, T. (2025). Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio. In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, & L. Bugiel (Eds.), 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education. Waxmann. https://doi.org/10.31244/9783818850715.19 bibtex: '@inbook{Neuhausen_2025, title={Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio}, DOI={10.31244/9783818850715.19}, booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education}, publisher={Waxmann}, author={Neuhausen, Timo}, editor={Frey-Konrad, Ute and Hofbauer, Viola Cäcilia and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }' chicago: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.” In 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, edited by Ute Frey-Konrad, Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel. Waxmann, 2025. https://doi.org/10.31244/9783818850715.19. ieee: T. Neuhausen, “Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio,” in 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025. mla: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.” 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, edited by Ute Frey-Konrad et al., Waxmann, 2025, doi:10.31244/9783818850715.19. short: 'T. Neuhausen, in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel (Eds.), 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education, Waxmann, 2025.' date_created: 2026-02-28T09:47:25Z date_updated: 2026-02-28T15:28:48Z department: - _id: '131' - _id: '36' - _id: '129' - _id: '540' doi: 10.31244/9783818850715.19 editor: - first_name: Ute full_name: Frey-Konrad, Ute last_name: Frey-Konrad - first_name: Viola Cäcilia full_name: Hofbauer, Viola Cäcilia last_name: Hofbauer - first_name: Olivier full_name: Blanchard, Olivier last_name: Blanchard - first_name: Lukas full_name: Bugiel, Lukas last_name: Bugiel language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association for Research in Music Education publication_identifier: isbn: - '9783818800710' publication_status: published publisher: Waxmann quality_controlled: '1' status: public title: Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio type: book_chapter user_id: '99991' year: '2025' ... --- _id: '64798' abstract: - lang: eng text: "Lead-containing piezoelectric ceramics are still the base for today’s ultrasonic transducers used in broad applications. This is partly due to missing powerful lead-free piezoelectric ceramic parts in the commercial market. There has been much research on lead-free materials but developing them into marketable parts seems to be an ongoing process. The actual exemption of ROHS has expired, but as the new exemption has already been requested, ceramic suppliers keep on selling lead containing products. Nevertheless, these should be replaced by lead-free alternatives for environmental and health issues. \r\nThis contribution focuses on exploring the technological readiness level of lead-free hard piezoceramics for prestressed ultrasonic transducers. A small series of bolted Langevin transducers was set up with standard PZT material and three commercial lead-free variants. Results of the building process from individual ring ceramic characteristics to transducer load tests are presented. The main finding of this study is that the lead-free materials technically can compete with the standard PZT for medium-power applications. Some adaptations in the ultrasonic system must be done: the geometry must be altered to fit resonance frequency, and higher voltages or thinner ceramics are needed to achieve the same vibration level at low load. For reaching same power, the volume of lead-free ceramics must be 1.5 to 3 times larger. As already promoted in literature, mechanical losses at high vibration levels are smaller for the lead-free materials. This might help to argument lead-free piezoelectric materials in some applications.\r\n\r\nReferences\r\n1.\tDirective 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment. EUR-Lex Document 02011L0065-20240801. Available online: http://data.europa.eu/eli/dir/2011/65/2024-08-01 (accessed on 24 January 2025).\r\n2.\tLangevin, P. (1918) Method and Apparatus for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric Properties of Quartz. French Patent Office; Patent No. FR505703.\r\n3.\tHemsel, T.; Twiefel, J. (2023) Piezoelectric Ultrasonic Power Transducers. In Encyclopedia of Materials: Electronics; Academic Press: Oxford, UK; pp. 276–285. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.\r\n4.\tATHENA Technologie Beratung GmbH (2025) Description of Ultrasound Generator. Available online: http://shop.myathena.de/epages/12074748.sf/de_DE/?ObjectPath=/Shops/12074748/Products/AM200 (accessed on 13 January 2025).\r\n5.\tLittmann, W.; Hemsel, T.; Kauczor, C.; Wallaschek, J.; Sinha, W. (2003) Load-adaptive phase-controller for resonant driven piezoelectric devices. Proc. World Congr. Ultrason. 2003, 48, 547–550.\r\n6.\tScheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free Ceramics in Prestressed Ultrasonic Transducers. Actuators, 14(2), 55. https://doi.org/10.3390/act14020055\r\n" author: - first_name: Claus full_name: Scheidemann, Claus id: '38259' last_name: Scheidemann - first_name: Peter full_name: Bornmann, Peter last_name: Bornmann - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: 'Scheidemann C, Bornmann P, Littmann W, Hemsel T. Bolted Langevin transducers with leadfree piezoelectric ceramics. In: ; 2025.' apa: Scheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Bolted Langevin transducers with leadfree piezoelectric ceramics. International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania. bibtex: '@inproceedings{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Bolted Langevin transducers with leadfree piezoelectric ceramics}, author={Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025} }' chicago: Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel. “Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics,” 2025. ieee: C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin transducers with leadfree piezoelectric ceramics,” presented at the International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania, 2025. mla: Scheidemann, Claus, et al. Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics. 2025. short: 'C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, in: 2025.' conference: end_date: 2025-07-03 location: Vilnius, Lithuania name: International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA) start_date: 2025-07-01 date_created: 2026-03-02T10:39:40Z date_updated: 2026-03-02T11:04:56Z ddc: - '620' department: - _id: '151' file: - access_level: open_access content_type: application/pdf creator: hemsel date_created: 2026-03-02T10:37:46Z date_updated: 2026-03-02T11:00:37Z file_id: '64799' file_name: IWPMA_2025_Hemsel.pdf file_size: 1812289 relation: main_file file_date_updated: 2026-03-02T11:00:37Z has_accepted_license: '1' keyword: - lead free piezoelectric ceramics - bolted Langevin transducer - medium power ultrasound. language: - iso: eng oa: '1' status: public title: Bolted Langevin transducers with leadfree piezoelectric ceramics type: conference user_id: '210' year: '2025' ... --- _id: '64800' abstract: - lang: eng text: "Intensive ultrasonic cleaning of surfaces by means of a lead-free ultrasonic transducer with focusing sonotrode\r\nUltrasonic cleaning baths are probably a coincidental development: After underwater sonars had already been successfully used to detect submarines before 1920, it was probably observed in this environment that the ultrasonic oscillators not only showed a self-cleaning effect but also cavitation damage. At the beginning of the 1950s, the first ultrasonic cleaning devices finally came onto the market. Today, the range of applications ranges from household appliances for jewellery and eyewear cleaning to classic cleaning baths for metal parts and systems for cleaning highly sensitive electronic components. There is a certain gap in handheld, mobile cleaning equipment. Although devices for spot cleaning of textiles are known, the cleaning effect is usually low. \r\nDue to the directive 2011/65/EU on the restriction of the use of hazardous substances in electrical and electronic equipment (RoHS) [1] lead should no longer be used in technical devices. As today’s standard ceramics for medium and high-power ultrasonic transducers typically contain lead, there is a need to explore the use of lead-free ceramics in this field. Honda [2] already offers a cleaning transducer based on lead-free piezoelectric ceramics, but it is designed to be used in cleaning baths.\r\nThis article presents the model-based development of a highly innovative ultrasonic cleaner. On the one hand, lead-free piezoelectric ceramics are used, and on the other hand, a special sonotrode has been developed that concentrates the sound in such a way that a strong cavitation and thus cleaning effect is achieved with comparatively low power in a short time. Coupled field finite element method was used to find an appropriate geometry for the focussing sonotrode. The comparison of simulation and measurement results shows that the lead-free piezoceramics used do their job well and can keep up with standard ceramics, but more ceramic volume is needed to achieve same power. An advanced control concept was elaborated to ensure continuous hard cavitation at varying distances between the sonotrode and the part to be cleaned. Cleaning results for different surfaces and contaminations are presented. The concept of the focusing sonotrode shows that a convincing cleaning result can be achieved even with low power and in short time, provided that the oscillation system and control electronics are suitably coordinated.\r\n\r\nReferences\r\n[1] http://data.europa.eu/eli/dir/2011/65/2024-08-01 \r\n[2] https://en.honda-el.co.jp/product/ceramics/lineup/lead_off/lead-off \r\n" author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Claus full_name: Scheidemann, Claus id: '38259' last_name: Scheidemann - first_name: Peter full_name: Bornmann, Peter last_name: Bornmann - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Hemsel T, Scheidemann C, Bornmann P, Littmann W, Sextro W. Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode. In: ; 2025.' apa: Hemsel, T., Scheidemann, C., Bornmann, P., Littmann, W., & Sextro, W. (2025). Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode. International Congress on Ultrasonics (ICU), Paderborn, Germany. bibtex: '@inproceedings{Hemsel_Scheidemann_Bornmann_Littmann_Sextro_2025, title={Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode}, author={Hemsel, Tobias and Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Sextro, Walter}, year={2025} }' chicago: Hemsel, Tobias, Claus Scheidemann, Peter Bornmann, Walter Littmann, and Walter Sextro. “Intensive Ultrasonic Cleaning of Surfaces by Means of Lead-Free Ultrasonic Transducer with Focussing Sonotrode,” 2025. ieee: T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, and W. Sextro, “Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode,” presented at the International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025. mla: Hemsel, Tobias, et al. Intensive Ultrasonic Cleaning of Surfaces by Means of Lead-Free Ultrasonic Transducer with Focussing Sonotrode. 2025. short: 'T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, W. Sextro, in: 2025.' conference: end_date: 2025-09-25 location: Paderborn, Germany name: International Congress on Ultrasonics (ICU) start_date: 2025-09-21 date_created: 2026-03-02T10:47:48Z date_updated: 2026-03-02T10:58:37Z ddc: - '620' department: - _id: '151' file: - access_level: open_access content_type: application/pdf creator: hemsel date_created: 2026-03-02T10:46:43Z date_updated: 2026-03-02T10:58:37Z file_id: '64801' file_name: ICU_2025_Hemsel.pdf file_size: 1946202 relation: main_file file_date_updated: 2026-03-02T10:58:37Z has_accepted_license: '1' language: - iso: eng oa: '1' status: public title: Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode type: conference user_id: '210' year: '2025' ... --- _id: '61755' author: - first_name: Claus full_name: Scheidemann, Claus id: '38259' last_name: Scheidemann - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Scheidemann C, Hemsel T, Sextro W. Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers. In: ; 2025.' apa: Scheidemann, C., Hemsel, T., & Sextro, W. (2025). Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers. 22nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania. bibtex: '@inproceedings{Scheidemann_Hemsel_Sextro_2025, title={Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers}, author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2025} }' chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Time Dependent Material Characteristics of Prestressed Piezoelectric Ceramics in Langevin Transducers,” 2025. ieee: C. Scheidemann, T. Hemsel, and W. Sextro, “Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers,” presented at the 22nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania, 2025. mla: Scheidemann, Claus, et al. Time Dependent Material Characteristics of Prestressed Piezoelectric Ceramics in Langevin Transducers. 2025. short: 'C. Scheidemann, T. Hemsel, W. Sextro, in: 2025.' conference: end_date: 2025-07-3 location: Vilnius, Lithuania name: 22nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA) start_date: 2025-07-1 date_created: 2025-10-08T14:22:32Z date_updated: 2026-03-02T10:59:53Z ddc: - '620' department: - _id: '151' file: - access_level: open_access content_type: application/pdf creator: hemsel date_created: 2026-01-30T11:07:48Z date_updated: 2026-03-02T10:59:53Z file_id: '63817' file_name: SHS25_IWPMA_2025.pdf file_size: 644147 relation: main_file file_date_updated: 2026-03-02T10:59:53Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '245' name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)' status: public title: Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers type: conference user_id: '210' year: '2025' ... --- _id: '61757' author: - first_name: Claus full_name: Scheidemann, Claus id: '38259' last_name: Scheidemann - first_name: Julius full_name: Porzenheim, Julius last_name: Porzenheim - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Scheidemann C, Porzenheim J, Hemsel T, Sextro W. Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. In: ; 2025.' apa: Scheidemann, C., Porzenheim, J., Hemsel, T., & Sextro, W. (2025). Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. 2025 International Congress on Ultrasonics (ICU), Paderborn, Germany. bibtex: '@inproceedings{Scheidemann_Porzenheim_Hemsel_Sextro_2025, title={Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers}, author={Scheidemann, Claus and Porzenheim, Julius and Hemsel, Tobias and Sextro, Walter}, year={2025} }' chicago: Scheidemann, Claus, Julius Porzenheim, Tobias Hemsel, and Walter Sextro. “Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,” 2025. ieee: C. Scheidemann, J. Porzenheim, T. Hemsel, and W. Sextro, “Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,” presented at the 2025 International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025. mla: Scheidemann, Claus, et al. Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. 2025. short: 'C. Scheidemann, J. Porzenheim, T. Hemsel, W. Sextro, in: 2025.' conference: end_date: 2025-09-25 location: Paderborn, Germany name: 2025 International Congress on Ultrasonics (ICU) start_date: 2025-09-21 date_created: 2025-10-08T14:33:44Z date_updated: 2026-03-02T10:59:36Z ddc: - '620' department: - _id: '151' file: - access_level: open_access content_type: application/pdf creator: hemsel date_created: 2026-01-30T07:30:44Z date_updated: 2026-03-02T10:59:36Z file_id: '63816' file_name: Sch25_ICU_2025.pdf file_size: 783790 relation: main_file file_date_updated: 2026-03-02T10:59:36Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '245' name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)' status: public title: Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers type: conference user_id: '210' year: '2025' ... --- _id: '64611' abstract: - lang: ger text: "Für die Aufrechterhaltung der natürlichen Ressourcen ist eine effiziente Nutzung dieser essenziell. Vor diesem Hintergrund untersucht das vorliegende Paper die Rolle der Kreislaufwirtschaft als wegweisendes Wirtschaftsmodell, das von der Europäischen Union gefördert wird. Ziel der Kreislaufwirtschaft ist es, den Ressourcenverbrauch und die Abfallproduktion zu minimieren, indem ein kontinuierlicher Kreislauf aus Nutzung, Wiederverwendung und Recycling von Materialien geschaffen wird. \r\nEin zentraler Aspekt dabei ist der Produktentwicklungsprozess (PEP) - ein vielschichtiger Prozess mit zahlreichen Einflussfaktoren und theoretisch unbegrenzten Gestaltungsmöglichkeiten. Diese Vielfalt führt jedoch zu erheblichen Entscheidungsunsicherheiten, die die Umsetzung von Kreislaufwirtschaftsprinzipien erschweren können. Um diese Herausforderungen zu adressieren, wird ein methodischer Prozess vorgestellt, der eine systematische Klassifizierung im Zusammenhang mit umliegenden Bauteilen ermöglicht. Die Methodik basiert auf einer strukturierten Bewertung von Bauteilen hinsichtlich ihrer Relevanz für die Kreislaufwirtschaft. Dabei werden zentrale Aspekte wie Wiederverwendbarkeit, Recyclingfähigkeit und Ressourceneffizienz berücksichtigt, darunter: \r\n•\tHandelt es sich um ein Gebrauchs- oder Verbrauchsprodukt?\r\n•\tIst das Bauteil eine Wiederverwendung oder eine Neufertigung?\r\n•\tIst das Bauteil standardisiert, zugekauft oder individuell ausgerichtet?\r\n•\tWelche primäre Funktion nimmt das Bauteil ein?\r\nDiese strukturierte Klassifizierung unterstützt die Entscheidungsfindung bereits früh im PEP. Sie ermöglicht es Produktentwickelnden, Potenziale für die Kreislaufwirtschaft frühzeitig zu erkennen und gezielt nachhaltige Maßnahmen zu ergreifen.\r\nDie entwickelte Methodik bildet somit eine Grundlage für die Integration kreislaufwirtschaftlicher Prinzipien in den Entwicklungsprozess. Insbesondere im Kontext moderner Anforderungen des Mobility Management zeigt sich ihr Potenzial, nachhaltige Innovationen gezielt zu fördern und die Umsetzung der Kreislaufwirtschaft in der industriellen Praxis zu erleichtern." author: - first_name: Katharina full_name: Rohde, Katharina id: '70143' last_name: Rohde orcid: 0009-0000-5738-7304 - first_name: Manuel full_name: Ott, Manuel id: '44204' last_name: Ott - first_name: Finn Lukas full_name: Budde, Finn Lukas id: '74585' last_name: Budde - first_name: Iryna full_name: Mozgova, Iryna id: '95903' last_name: Mozgova citation: ama: 'Rohde K, Ott M, Budde FL, Mozgova I. Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte. In: Proff H, ed. Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte. Springer Nature Meteor.' apa: 'Rohde, K., Ott, M., Budde, F. L., & Mozgova, I. (n.d.). Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte. In H. Proff (Ed.), Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte. Springer Nature Meteor.' bibtex: '@inproceedings{Rohde_Ott_Budde_Mozgova, title={Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte}, booktitle={Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte}, publisher={Springer Nature Meteor}, author={Rohde, Katharina and Ott, Manuel and Budde, Finn Lukas and Mozgova, Iryna}, editor={Proff, Heike} }' chicago: 'Rohde, Katharina, Manuel Ott, Finn Lukas Budde, and Iryna Mozgova. “Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte.” In Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte, edited by Heike Proff. Springer Nature Meteor, n.d.' ieee: 'K. Rohde, M. Ott, F. L. Budde, and I. Mozgova, “Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte,” in Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte, Duisburg.' mla: 'Rohde, Katharina, et al. “Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte.” Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte, edited by Heike Proff, Springer Nature Meteor.' short: 'K. Rohde, M. Ott, F.L. Budde, I. Mozgova, in: H. Proff (Ed.), Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte, Springer Nature Meteor, n.d.' conference: location: Duisburg name: 17. Wissenschaftsforum Mobilität start_date: 2025-05-15 date_created: 2026-02-24T12:40:57Z date_updated: 2026-03-03T11:21:06Z ddc: - '620' department: - _id: '741' editor: - first_name: Heike full_name: Proff, Heike last_name: Proff has_accepted_license: '1' language: - iso: ger main_file_link: - open_access: '1' oa: '1' publication: 'Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte' publication_status: inpress publisher: Springer Nature Meteor quality_controlled: '1' status: public title: 'Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte' type: conference user_id: '70143' year: '2025' ... --- _id: '56298' abstract: - lang: eng text: "In the general pattern formation (GPF) problem, a swarm of simple autonomous,\r\ndisoriented robots must form a given pattern. The robots' simplicity imply a\r\nstrong limitation: When the initial configuration is rotationally symmetric,\r\nonly patterns with a similar symmetry can be formed [Yamashita, Suzyuki; TCS\r\n2010]. The only known algorithm to form large patterns with limited visibility\r\nand without memory requires the robots to start in a near-gathering (a swarm of\r\nconstant diameter) [Hahn et al.; SAND 2024]. However, not only do we not know\r\nany near-gathering algorithm guaranteed to preserve symmetry but most natural\r\ngathering strategies trivially increase symmetries [Castenow et al.; OPODIS\r\n2022].\r\n Thus, we study near-gathering without changing the swarm's rotational\r\nsymmetry for disoriented, oblivious robots with limited visibility (the\r\nOBLOT-model, see [Flocchini et al.; 2019]). We introduce a technique based on\r\nthe theory of dynamical systems to analyze how a given algorithm affects\r\nsymmetry and provide sufficient conditions for symmetry preservation. Until\r\nnow, it was unknown whether the considered OBLOT-model allows for any\r\nnon-trivial algorithm that always preserves symmetry. Our first result shows\r\nthat a variant of Go-to-the-Average always preserves symmetry but may sometimes\r\nlead to multiple, unconnected near-gathering clusters. Our second result is a\r\nsymmetry-preserving near-gathering algorithm that works on swarms with a convex\r\nboundary (the outer boundary of the unit disc graph) and without holes (circles\r\nof diameter 1 inside the boundary without any robots)." author: - first_name: Raphael full_name: Gerlach, Raphael id: '32655' last_name: Gerlach orcid: 0009-0002-4750-2051 - first_name: Sören full_name: von der Gracht, Sören id: '97359' last_name: von der Gracht orcid: 0000-0002-8054-2058 - first_name: Christopher full_name: Hahn, Christopher last_name: Hahn - first_name: Jonas full_name: Harbig, Jonas id: '47213' last_name: Harbig - first_name: Peter full_name: Kling, Peter last_name: Kling citation: ama: 'Gerlach R, von der Gracht S, Hahn C, Harbig J, Kling P. Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility. In: Bonomi S, Galletta L, Rivière Etienne, Schiavoni Valerio, eds. 28th International Conference on Principles of Distributed Systems (OPODIS 2024). Vol 324. Leibniz International Proceedings in Informatics (LIPIcs). Schloss Dagstuhl -- Leibniz-Zentrum für Informatik; 2025. doi:10.4230/LIPIcs.OPODIS.2024.13' apa: Gerlach, R., von der Gracht, S., Hahn, C., Harbig, J., & Kling, P. (2025). Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility. In S. Bonomi, L. Galletta, Etienne Rivière, & Valerio Schiavoni (Eds.), 28th International Conference on Principles of Distributed Systems (OPODIS 2024) (Vol. 324). Schloss Dagstuhl -- Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.OPODIS.2024.13 bibtex: '@inproceedings{Gerlach_von der Gracht_Hahn_Harbig_Kling_2025, series={Leibniz International Proceedings in Informatics (LIPIcs)}, title={Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility}, volume={324}, DOI={10.4230/LIPIcs.OPODIS.2024.13}, booktitle={28th International Conference on Principles of Distributed Systems (OPODIS 2024)}, publisher={Schloss Dagstuhl -- Leibniz-Zentrum für Informatik}, author={Gerlach, Raphael and von der Gracht, Sören and Hahn, Christopher and Harbig, Jonas and Kling, Peter}, editor={Bonomi, Silvia and Galletta, Letterio and Rivière, Etienne and Schiavoni, Valerio}, year={2025}, collection={Leibniz International Proceedings in Informatics (LIPIcs)} }' chicago: Gerlach, Raphael, Sören von der Gracht, Christopher Hahn, Jonas Harbig, and Peter Kling. “Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility.” In 28th International Conference on Principles of Distributed Systems (OPODIS 2024), edited by Silvia Bonomi, Letterio Galletta, Etienne Rivière, and Valerio Schiavoni, Vol. 324. Leibniz International Proceedings in Informatics (LIPIcs). Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2025. https://doi.org/10.4230/LIPIcs.OPODIS.2024.13. ieee: 'R. Gerlach, S. von der Gracht, C. Hahn, J. Harbig, and P. Kling, “Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility,” in 28th International Conference on Principles of Distributed Systems (OPODIS 2024), Lucca, Italy, 2025, vol. 324, doi: 10.4230/LIPIcs.OPODIS.2024.13.' mla: Gerlach, Raphael, et al. “Symmetry Preservation in Swarms of Oblivious Robots with Limited  Visibility.” 28th International Conference on Principles of Distributed Systems (OPODIS 2024), edited by Silvia Bonomi et al., vol. 324, Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2025, doi:10.4230/LIPIcs.OPODIS.2024.13. short: 'R. Gerlach, S. von der Gracht, C. Hahn, J. Harbig, P. Kling, in: S. Bonomi, L. Galletta, Etienne Rivière, Valerio Schiavoni (Eds.), 28th International Conference on Principles of Distributed Systems (OPODIS 2024), Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2025.' conference: end_date: 2024-12-13 location: Lucca, Italy name: 28th International Conference on Principles of Distributed Systems (OPODIS 2024) start_date: 2024-12-11 date_created: 2024-10-01T13:29:43Z date_updated: 2025-01-09T11:39:19Z department: - _id: '101' doi: 10.4230/LIPIcs.OPODIS.2024.13 editor: - first_name: Silvia full_name: Bonomi, Silvia last_name: Bonomi - first_name: Letterio full_name: Galletta, Letterio last_name: Galletta - first_name: ' Etienne' full_name: Rivière, Etienne last_name: Rivière - first_name: ' Valerio' full_name: Schiavoni, Valerio last_name: Schiavoni external_id: arxiv: - '2409.19277' intvolume: ' 324' keyword: - Swarm Algorithm - Swarm Robots - Distributed Algorithm - Pattern Formation - Limited Visibility - Oblivious language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2409.19277 oa: '1' project: - _id: '106' grant_number: '453112019' name: 'Algorithmen für Schwarmrobotik: Verteiltes Rechnen trifft Dynamische Systeme' publication: 28th International Conference on Principles of Distributed Systems (OPODIS 2024) publication_identifier: isbn: - 978-3-95977-360-7 issn: - 1868-8969 publication_status: published publisher: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik series_title: Leibniz International Proceedings in Informatics (LIPIcs) status: public title: Symmetry Preservation in Swarms of Oblivious Robots with Limited Visibility type: conference user_id: '97359' volume: 324 year: '2025' ... --- _id: '58150' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Mauricio full_name: Marrone, Mauricio last_name: Marrone - first_name: Jack full_name: Yang, Jack last_name: Yang citation: ama: Schryen G, Marrone M, Yang J. Exploring the Scope of Generative AI in Literature Review Development. Electronic Markets. Published online 2025. apa: Schryen, G., Marrone, M., & Yang, J. (2025). Exploring the Scope of Generative AI in Literature Review Development. Electronic Markets. bibtex: '@article{Schryen_Marrone_Yang_2025, title={Exploring the Scope of Generative AI in Literature Review Development}, journal={Electronic Markets}, author={Schryen, Guido and Marrone, Mauricio and Yang, Jack}, year={2025} }' chicago: Schryen, Guido, Mauricio Marrone, and Jack Yang. “Exploring the Scope of Generative AI in Literature Review Development.” Electronic Markets, 2025. ieee: G. Schryen, M. Marrone, and J. Yang, “Exploring the Scope of Generative AI in Literature Review Development,” Electronic Markets, 2025. mla: Schryen, Guido, et al. “Exploring the Scope of Generative AI in Literature Review Development.” Electronic Markets, 2025. short: G. Schryen, M. Marrone, J. Yang, Electronic Markets (2025). date_created: 2025-01-10T15:13:23Z date_updated: 2025-01-10T16:51:02Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: mateskam date_created: 2025-01-10T16:50:54Z date_updated: 2025-01-10T16:50:54Z file_id: '58152' file_name: Electronic Markets - Exploring the Scope of Generative AI in Literature Review Development - Preprint.pdf file_size: 4950416 relation: main_file file_date_updated: 2025-01-10T16:50:54Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Electronic Markets status: public title: Exploring the Scope of Generative AI in Literature Review Development type: journal_article user_id: '51811' year: '2025' ... --- _id: '58544' abstract: - lang: eng text: 'We introduce a new classification of multimode states with a fixed number of photons. This classification is based on the factorizability of homogeneous multivariate polynomials and is invariant under unitary transformations. The classes physically correspond to field excitations in terms of single and multiple photons, each of which being in an arbitrary irreducible superposition of quantized modes. We further show how the transitions between classes are rendered possible by photon addition, photon subtraction, and photon-projection nonlinearities. We explicitly put forward a design for a multilayer interferometer in which the states for different classes can be generated with state-of-the-art experimental techniques. Limitations of the proposed designs are analyzed using the introduced classification, providing a benchmark for the robustness of certain states and classes. ' author: - first_name: Denis full_name: Kopylov, Denis id: '98502' last_name: Kopylov - first_name: Christian full_name: Offen, Christian id: '85279' last_name: Offen orcid: 0000-0002-5940-8057 - first_name: Laura full_name: Ares, Laura last_name: Ares - first_name: Boris Edgar full_name: Wembe Moafo, Boris Edgar id: '95394' last_name: Wembe Moafo - first_name: Sina full_name: Ober-Blöbaum, Sina id: '16494' last_name: Ober-Blöbaum - first_name: Torsten full_name: Meier, Torsten id: '344' last_name: Meier orcid: 0000-0001-8864-2072 - first_name: Polina full_name: Sharapova, Polina id: '60286' last_name: Sharapova - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 citation: ama: Kopylov D, Offen C, Ares L, et al. Multiphoton, multimode state classification for nonlinear optical circuits . apa: Kopylov, D., Offen, C., Ares, L., Wembe Moafo, B. E., Ober-Blöbaum, S., Meier, T., Sharapova, P., & Sperling, J. (n.d.). Multiphoton, multimode state classification for nonlinear optical circuits . bibtex: '@article{Kopylov_Offen_Ares_Wembe Moafo_Ober-Blöbaum_Meier_Sharapova_Sperling, title={Multiphoton, multimode state classification for nonlinear optical circuits }, author={Kopylov, Denis and Offen, Christian and Ares, Laura and Wembe Moafo, Boris Edgar and Ober-Blöbaum, Sina and Meier, Torsten and Sharapova, Polina and Sperling, Jan} }' chicago: Kopylov, Denis, Christian Offen, Laura Ares, Boris Edgar Wembe Moafo, Sina Ober-Blöbaum, Torsten Meier, Polina Sharapova, and Jan Sperling. “Multiphoton, Multimode State Classification for Nonlinear Optical Circuits ,” n.d. ieee: D. Kopylov et al., “Multiphoton, multimode state classification for nonlinear optical circuits .” . mla: Kopylov, Denis, et al. Multiphoton, Multimode State Classification for Nonlinear Optical Circuits . short: D. Kopylov, C. Offen, L. Ares, B.E. Wembe Moafo, S. Ober-Blöbaum, T. Meier, P. Sharapova, J. Sperling, (n.d.). date_created: 2025-02-10T08:26:45Z date_updated: 2025-02-10T08:36:12Z department: - _id: '623' - _id: '15' - _id: '636' external_id: arxiv: - '2502.05123' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2502.05123 oa: '1' publication_status: submitted status: public title: 'Multiphoton, multimode state classification for nonlinear optical circuits ' type: preprint user_id: '85279' year: '2025' ... --- _id: '58606' author: - first_name: Albert full_name: Mathew, Albert last_name: Mathew - first_name: Rebecca full_name: Aschwanden, Rebecca last_name: Aschwanden - first_name: Aditya full_name: Tripathi, Aditya last_name: Tripathi - first_name: Piyush full_name: Jangid, Piyush last_name: Jangid - first_name: Basudeb full_name: Sain, Basudeb last_name: Sain - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Sergey full_name: Kruk, Sergey last_name: Kruk citation: ama: Mathew A, Aschwanden R, Tripathi A, et al. Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials. Nano Letters. Published online 2025. doi:10.1021/acs.nanolett.4c06188 apa: Mathew, A., Aschwanden, R., Tripathi, A., Jangid, P., Sain, B., Zentgraf, T., & Kruk, S. (2025). Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials. Nano Letters. https://doi.org/10.1021/acs.nanolett.4c06188 bibtex: '@article{Mathew_Aschwanden_Tripathi_Jangid_Sain_Zentgraf_Kruk_2025, title={Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials}, DOI={10.1021/acs.nanolett.4c06188}, journal={Nano Letters}, publisher={American Chemical Society (ACS)}, author={Mathew, Albert and Aschwanden, Rebecca and Tripathi, Aditya and Jangid, Piyush and Sain, Basudeb and Zentgraf, Thomas and Kruk, Sergey}, year={2025} }' chicago: Mathew, Albert, Rebecca Aschwanden, Aditya Tripathi, Piyush Jangid, Basudeb Sain, Thomas Zentgraf, and Sergey Kruk. “Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials.” Nano Letters, 2025. https://doi.org/10.1021/acs.nanolett.4c06188. ieee: 'A. Mathew et al., “Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials,” Nano Letters, 2025, doi: 10.1021/acs.nanolett.4c06188.' mla: Mathew, Albert, et al. “Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials.” Nano Letters, American Chemical Society (ACS), 2025, doi:10.1021/acs.nanolett.4c06188. short: A. Mathew, R. Aschwanden, A. Tripathi, P. Jangid, B. Sain, T. Zentgraf, S. Kruk, Nano Letters (2025). date_created: 2025-02-12T12:54:41Z date_updated: 2025-02-12T13:02:21Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1021/acs.nanolett.4c06188 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2501.11920 oa: '1' project: - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '170' grant_number: '231447078' name: 'TRR 142 - B09: TRR 142 - Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen (B09*)' - _id: '65' grant_number: '231447078' name: 'TRR 142 - A08: TRR 142 - Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten (A08)' publication: Nano Letters publication_identifier: issn: - 1530-6984 - 1530-6992 publication_status: published publisher: American Chemical Society (ACS) status: public title: Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials type: journal_article user_id: '30525' year: '2025' ... --- _id: '58616' author: - first_name: Tassja full_name: Weber, Tassja id: '89571' last_name: Weber - first_name: Sabine full_name: Kober, Sabine last_name: Kober - first_name: Carmen full_name: Lewa, Carmen last_name: Lewa - first_name: Elisabeth full_name: Scherer, Elisabeth last_name: Scherer - first_name: Sarah full_name: Schotemeier, Sarah last_name: Schotemeier citation: ama: 'Weber T, Kober S, Lewa C, Scherer E, Schotemeier S. Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen. In: Mrohs L, Franz J, Herrmann D, Lindner K, Staake T, eds. Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung. transcript Verlag; 2025:47-54. doi:https://doi.org/10.14361/9783839471203' apa: Weber, T., Kober, S., Lewa, C., Scherer, E., & Schotemeier, S. (2025). Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen. In L. Mrohs, J. Franz, D. Herrmann, K. Lindner, & T. Staake (Eds.), Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung (pp. 47–54). transcript Verlag. https://doi.org/10.14361/9783839471203 bibtex: '@inbook{Weber_Kober_Lewa_Scherer_Schotemeier_2025, place={Bielefeld}, title={Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen}, DOI={https://doi.org/10.14361/9783839471203}, booktitle={Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung}, publisher={transcript Verlag}, author={Weber, Tassja and Kober, Sabine and Lewa, Carmen and Scherer, Elisabeth and Schotemeier, Sarah}, editor={Mrohs, Lorenz and Franz, Julia and Herrmann, Dominik and Lindner, Konstantin and Staake, Thorsten}, year={2025}, pages={47–54} }' chicago: 'Weber, Tassja, Sabine Kober, Carmen Lewa, Elisabeth Scherer, and Sarah Schotemeier. “Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen.” In Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung, edited by Lorenz Mrohs, Julia Franz, Dominik Herrmann, Konstantin Lindner, and Thorsten Staake, 47–54. Bielefeld: transcript Verlag, 2025. https://doi.org/10.14361/9783839471203.' ieee: 'T. Weber, S. Kober, C. Lewa, E. Scherer, and S. Schotemeier, “Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen,” in Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung, L. Mrohs, J. Franz, D. Herrmann, K. Lindner, and T. Staake, Eds. Bielefeld: transcript Verlag, 2025, pp. 47–54.' mla: Weber, Tassja, et al. “Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen.” Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung, edited by Lorenz Mrohs et al., transcript Verlag, 2025, pp. 47–54, doi:https://doi.org/10.14361/9783839471203. short: 'T. Weber, S. Kober, C. Lewa, E. Scherer, S. Schotemeier, in: L. Mrohs, J. Franz, D. Herrmann, K. Lindner, T. Staake (Eds.), Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung, transcript Verlag, Bielefeld, 2025, pp. 47–54.' date_created: 2025-02-12T15:04:01Z date_updated: 2025-02-12T15:10:27Z doi: https://doi.org/10.14361/9783839471203 editor: - first_name: Lorenz full_name: Mrohs, Lorenz last_name: Mrohs - first_name: Julia full_name: Franz, Julia last_name: Franz - first_name: Dominik full_name: Herrmann, Dominik last_name: Herrmann - first_name: Konstantin full_name: Lindner, Konstantin last_name: Lindner - first_name: Thorsten full_name: Staake, Thorsten last_name: Staake language: - iso: ger main_file_link: - open_access: '1' url: https://www.transcript-verlag.de/978-3-8376-7120-9/digitales-lehren-und-lernen-an-der-hochschule/?number=978-3-8394-7120-3 oa: '1' page: 47-54 place: Bielefeld publication: Digitales Lehren und Lernen an der Hochschule. Strategien - Bedingungen - Umsetzung publication_identifier: isbn: - 978-3-8376-7120-9 publication_status: published publisher: transcript Verlag status: public title: Eine Kultur des Teilens hochschulübergreifend durch OER voranbringen type: book_chapter user_id: '89571' year: '2025' ... --- _id: '58076' abstract: - lang: eng text: This paper presents the concept of Information Circularity Assistance, which provides decision support in the early stages of product creation for Circular Economy. Engineers in strategic product planning need to proactively predict the quantity, quality, and timing of secondary materials and returned components. For example, products with high recycled content will only be economically sustainable if the material is actually available in the future product life. Our assumption is that Information Circularity Assistance enables decision makers to incorporate insights from extreme data – high-volume, high-velocity, heterogeneous and distributed data from the product life – into product creation through intelligent Digital Twins. Artificial Intelligence can help to derive sustainable actions in favor of circular products by processing extreme data and enriching it with expert knowledge. The research contributes in three key dimensions. First, a comprehensive literature review is conducted. This review covers concepts of intelligence in Scenario-Technique for strategic product planning, Digital Twin-based analysis of extreme data and relevant technologies from Data Science and Artificial Intelligence. In all areas, the state of the art and emerging trends are identified. Secondly, the study identifies information needs along the steps of the Scenario-Technique and information offerings based on Digital Twins. The concept of Information Circularity Assistance results from the coupling of these demands and offerings, extending the Scenario-Technique beyond traditional expert-based methods. Third, we extend existing Digital Twin methods used in circularity and discuss the deployment of Data Science and Artificial Intelligence algorithms within the product creation process. Our approach uses extreme data to provide a strategic advantage in optimizing product life cycle planning, which is illustrated by two sample applications. The aim is to provide Information Circularity Assistance that will support experienced product planners, developers, and decision makers in the future. alternative_title: - Utilizing Artificial Intelligence, Scenario-Technique and Digital Twins to solve challenges of product creation for Circular Economy article_type: original author: - first_name: Iris full_name: Gräßler, Iris id: '47565' last_name: Gräßler orcid: 0000-0001-5765-971X - first_name: Michael full_name: Weyrich, Michael last_name: Weyrich - first_name: Jens full_name: Pottebaum, Jens id: '405' last_name: Pottebaum orcid: http://orcid.org/0000-0001-8778-2989 - first_name: Simon full_name: Kamm, Simon last_name: Kamm citation: ama: Gräßler I, Weyrich M, Pottebaum J, Kamm S. Information Circularity Assistance based on extreme data. at - Automatisierungstechnik. 2025;73(1):3-21. doi:10.1515/auto-2024-0039 apa: Gräßler, I., Weyrich, M., Pottebaum, J., & Kamm, S. (2025). Information Circularity Assistance based on extreme data. At - Automatisierungstechnik, 73(1), 3–21. https://doi.org/10.1515/auto-2024-0039 bibtex: '@article{Gräßler_Weyrich_Pottebaum_Kamm_2025, title={Information Circularity Assistance based on extreme data}, volume={73}, DOI={10.1515/auto-2024-0039}, number={1}, journal={at - Automatisierungstechnik}, publisher={Walter de Gruyter GmbH}, author={Gräßler, Iris and Weyrich, Michael and Pottebaum, Jens and Kamm, Simon}, year={2025}, pages={3–21} }' chicago: 'Gräßler, Iris, Michael Weyrich, Jens Pottebaum, and Simon Kamm. “Information Circularity Assistance Based on Extreme Data.” At - Automatisierungstechnik 73, no. 1 (2025): 3–21. https://doi.org/10.1515/auto-2024-0039.' ieee: 'I. Gräßler, M. Weyrich, J. Pottebaum, and S. Kamm, “Information Circularity Assistance based on extreme data,” at - Automatisierungstechnik, vol. 73, no. 1, pp. 3–21, 2025, doi: 10.1515/auto-2024-0039.' mla: Gräßler, Iris, et al. “Information Circularity Assistance Based on Extreme Data.” At - Automatisierungstechnik, vol. 73, no. 1, Walter de Gruyter GmbH, 2025, pp. 3–21, doi:10.1515/auto-2024-0039. short: I. Gräßler, M. Weyrich, J. Pottebaum, S. Kamm, At - Automatisierungstechnik 73 (2025) 3–21. date_created: 2025-01-07T13:30:45Z date_updated: 2025-02-15T09:41:54Z department: - _id: '152' doi: 10.1515/auto-2024-0039 intvolume: ' 73' issue: '1' keyword: - Scenario-Technique - Artificial Intelligence - Digital Twin - Large Language Models language: - iso: eng main_file_link: - open_access: '1' oa: '1' page: 3-21 publication: at - Automatisierungstechnik publication_identifier: issn: - 0178-2312 - 2196-677X publication_status: published publisher: Walter de Gruyter GmbH quality_controlled: '1' status: public title: Information Circularity Assistance based on extreme data type: journal_article user_id: '405' volume: 73 year: '2025' ... --- _id: '58650' abstract: - lang: eng text: 'Technical systems are characterized by increasing interdisciplinarity, complexity and networking. A product and its corresponding production systems require interdisciplinary multi-objective optimization. Sustainability and recyclability demands increase said complexity. The efficiency of previously established engineering methods is reaching its limits, which can only be overcome by systematic integration of extreme data. The aim of "hybrid decision support" is as follows: Data science and artificial intelligence should be used to supplement human capabilities in conjunction with existing heuristics, methods, modeling and simulation to increase the efficiency of product creation.' alternative_title: - Hybride Entscheidungsunterstützung in der Produktentstehung - Mit Data Science und Künstlicher Intelligenz die Leistungsfähigkeit erhöhen article_type: original author: - first_name: Iris full_name: Gräßler, Iris id: '47565' last_name: Gräßler orcid: 0000-0001-5765-971X - first_name: Jens full_name: Pottebaum, Jens id: '405' last_name: Pottebaum orcid: http://orcid.org/0000-0001-8778-2989 - first_name: Peter full_name: Nyhuis, Peter last_name: Nyhuis - first_name: Rainer full_name: Stark, Rainer last_name: Stark - first_name: Klaus-Dieter full_name: Thoben, Klaus-Dieter last_name: Thoben - first_name: Petra full_name: Wiederkehr, Petra last_name: Wiederkehr citation: ama: Gräßler I, Pottebaum J, Nyhuis P, Stark R, Thoben K-D, Wiederkehr P. Hybrid Decision Support in Product Creation - Improving performance with data science and artificial intelligence. Industry 40 Science. 2025;2025(1). doi:10.30844/i4sd.25.1.18 apa: Gräßler, I., Pottebaum, J., Nyhuis, P., Stark, R., Thoben, K.-D., & Wiederkehr, P. (2025). Hybrid Decision Support in Product Creation - Improving performance with data science and artificial intelligence. Industry 4.0 Science, 2025(1). https://doi.org/10.30844/i4sd.25.1.18 bibtex: '@article{Gräßler_Pottebaum_Nyhuis_Stark_Thoben_Wiederkehr_2025, title={Hybrid Decision Support in Product Creation - Improving performance with data science and artificial intelligence}, volume={2025}, DOI={10.30844/i4sd.25.1.18}, number={1}, journal={Industry 4.0 Science}, publisher={GITO mbH Verlag}, author={Gräßler, Iris and Pottebaum, Jens and Nyhuis, Peter and Stark, Rainer and Thoben, Klaus-Dieter and Wiederkehr, Petra}, year={2025} }' chicago: Gräßler, Iris, Jens Pottebaum, Peter Nyhuis, Rainer Stark, Klaus-Dieter Thoben, and Petra Wiederkehr. “Hybrid Decision Support in Product Creation - Improving Performance with Data Science and Artificial Intelligence.” Industry 4.0 Science 2025, no. 1 (2025). https://doi.org/10.30844/i4sd.25.1.18. ieee: 'I. Gräßler, J. Pottebaum, P. Nyhuis, R. Stark, K.-D. Thoben, and P. Wiederkehr, “Hybrid Decision Support in Product Creation - Improving performance with data science and artificial intelligence,” Industry 4.0 Science, vol. 2025, no. 1, 2025, doi: 10.30844/i4sd.25.1.18.' mla: Gräßler, Iris, et al. “Hybrid Decision Support in Product Creation - Improving Performance with Data Science and Artificial Intelligence.” Industry 4.0 Science, vol. 2025, no. 1, GITO mbH Verlag, 2025, doi:10.30844/i4sd.25.1.18. short: I. Gräßler, J. Pottebaum, P. Nyhuis, R. Stark, K.-D. Thoben, P. Wiederkehr, Industry 4.0 Science 2025 (2025). date_created: 2025-02-15T09:31:30Z date_updated: 2025-02-15T09:40:52Z department: - _id: '152' doi: 10.30844/i4sd.25.1.18 intvolume: ' 2025' issue: '1' keyword: - AI - artificial intelligence - Data Science - decision support - extreme data - Künstliche Intelligenz - product creation - product development language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: Industry 4.0 Science publication_identifier: issn: - 2942-6170 publication_status: published publisher: GITO mbH Verlag quality_controlled: '1' status: public title: Hybrid Decision Support in Product Creation - Improving performance with data science and artificial intelligence type: journal_article user_id: '405' volume: 2025 year: '2025' ... --- _id: '58759' article_number: '121317' author: - first_name: Christopher full_name: Dechert, Christopher last_name: Dechert - first_name: Eugeny Y. full_name: Kenig, Eugeny Y. last_name: Kenig citation: ama: 'Dechert C, Kenig EY. Influence of microstructures on liquid spreading on inclined plates: A CFD based study. Chemical Engineering Science. Published online 2025. doi:10.1016/j.ces.2025.121317' apa: 'Dechert, C., & Kenig, E. Y. (2025). Influence of microstructures on liquid spreading on inclined plates: A CFD based study. Chemical Engineering Science, Article 121317. https://doi.org/10.1016/j.ces.2025.121317' bibtex: '@article{Dechert_Kenig_2025, title={Influence of microstructures on liquid spreading on inclined plates: A CFD based study}, DOI={10.1016/j.ces.2025.121317}, number={121317}, journal={Chemical Engineering Science}, publisher={Elsevier BV}, author={Dechert, Christopher and Kenig, Eugeny Y.}, year={2025} }' chicago: 'Dechert, Christopher, and Eugeny Y. Kenig. “Influence of Microstructures on Liquid Spreading on Inclined Plates: A CFD Based Study.” Chemical Engineering Science, 2025. https://doi.org/10.1016/j.ces.2025.121317.' ieee: 'C. Dechert and E. Y. Kenig, “Influence of microstructures on liquid spreading on inclined plates: A CFD based study,” Chemical Engineering Science, Art. no. 121317, 2025, doi: 10.1016/j.ces.2025.121317.' mla: 'Dechert, Christopher, and Eugeny Y. Kenig. “Influence of Microstructures on Liquid Spreading on Inclined Plates: A CFD Based Study.” Chemical Engineering Science, 121317, Elsevier BV, 2025, doi:10.1016/j.ces.2025.121317.' short: C. Dechert, E.Y. Kenig, Chemical Engineering Science (2025). date_created: 2025-02-21T12:23:00Z date_updated: 2025-02-21T12:32:19Z department: - _id: '831' doi: 10.1016/j.ces.2025.121317 extern: '1' language: - iso: eng main_file_link: - open_access: '1' oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Chemical Engineering Science publication_identifier: issn: - 0009-2509 publication_status: published publisher: Elsevier BV quality_controlled: '1' related_material: link: - relation: confirmation url: https://doi.org/10.1016/j.ces.2025.121317 status: public title: 'Influence of microstructures on liquid spreading on inclined plates: A CFD based study' type: journal_article user_id: '69828' year: '2025' ... --- _id: '58535' author: - first_name: Keke full_name: Yang, Keke id: '65085' last_name: Yang orcid: 0000-0001-9201-9304 - first_name: Zhuoqun full_name: Wang, Zhuoqun last_name: Wang - first_name: Viktor full_name: Haak, Viktor id: '60398' last_name: Haak - first_name: Viktoria full_name: Olfert, Viktoria id: '5974' last_name: Olfert - first_name: Bassel full_name: El-Sari, Bassel last_name: El-Sari - first_name: David full_name: Hein, David id: '7728' last_name: Hein - first_name: Max full_name: Biegler, Max last_name: Biegler - first_name: Michael full_name: Rethmeier, Michael last_name: Rethmeier - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 citation: ama: Yang K, Wang Z, Haak V, et al. A novel welding schedule for expanding the expulsion-free process window in resistance spot welding of dissimilar joints with ultra-high strength steel. Journal of Manufacturing Processes. 2025;137:306-319. doi:10.1016/j.jmapro.2025.02.009 apa: Yang, K., Wang, Z., Haak, V., Olfert, V., El-Sari, B., Hein, D., Biegler, M., Rethmeier, M., & Meschut, G. (2025). A novel welding schedule for expanding the expulsion-free process window in resistance spot welding of dissimilar joints with ultra-high strength steel. Journal of Manufacturing Processes, 137, 306–319. https://doi.org/10.1016/j.jmapro.2025.02.009 bibtex: '@article{Yang_Wang_Haak_Olfert_El-Sari_Hein_Biegler_Rethmeier_Meschut_2025, title={A novel welding schedule for expanding the expulsion-free process window in resistance spot welding of dissimilar joints with ultra-high strength steel}, volume={137}, DOI={10.1016/j.jmapro.2025.02.009}, journal={Journal of Manufacturing Processes}, publisher={Elsevier BV}, author={Yang, Keke and Wang, Zhuoqun and Haak, Viktor and Olfert, Viktoria and El-Sari, Bassel and Hein, David and Biegler, Max and Rethmeier, Michael and Meschut, Gerson}, year={2025}, pages={306–319} }' chicago: 'Yang, Keke, Zhuoqun Wang, Viktor Haak, Viktoria Olfert, Bassel El-Sari, David Hein, Max Biegler, Michael Rethmeier, and Gerson Meschut. “A Novel Welding Schedule for Expanding the Expulsion-Free Process Window in Resistance Spot Welding of Dissimilar Joints with Ultra-High Strength Steel.” Journal of Manufacturing Processes 137 (2025): 306–19. https://doi.org/10.1016/j.jmapro.2025.02.009.' ieee: 'K. Yang et al., “A novel welding schedule for expanding the expulsion-free process window in resistance spot welding of dissimilar joints with ultra-high strength steel,” Journal of Manufacturing Processes, vol. 137, pp. 306–319, 2025, doi: 10.1016/j.jmapro.2025.02.009.' mla: Yang, Keke, et al. “A Novel Welding Schedule for Expanding the Expulsion-Free Process Window in Resistance Spot Welding of Dissimilar Joints with Ultra-High Strength Steel.” Journal of Manufacturing Processes, vol. 137, Elsevier BV, 2025, pp. 306–19, doi:10.1016/j.jmapro.2025.02.009. short: K. Yang, Z. Wang, V. Haak, V. Olfert, B. El-Sari, D. Hein, M. Biegler, M. Rethmeier, G. Meschut, Journal of Manufacturing Processes 137 (2025) 306–319. date_created: 2025-02-07T10:08:08Z date_updated: 2025-02-24T07:30:23Z ddc: - '670' department: - _id: '157' doi: 10.1016/j.jmapro.2025.02.009 file: - access_level: closed content_type: application/pdf creator: kekeyang date_created: 2025-02-07T10:09:17Z date_updated: 2025-02-07T10:09:17Z file_id: '58536' file_name: KYA_VÖ6.pdf file_size: 3747516 relation: main_file success: 1 file_date_updated: 2025-02-07T10:09:17Z has_accepted_license: '1' intvolume: ' 137' language: - iso: eng main_file_link: - open_access: '1' oa: '1' page: 306-319 publication: Journal of Manufacturing Processes publication_identifier: issn: - 1526-6125 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: A novel welding schedule for expanding the expulsion-free process window in resistance spot welding of dissimilar joints with ultra-high strength steel type: journal_article user_id: '65085' volume: 137 year: '2025' ...