--- _id: '57898' author: - first_name: Simon full_name: Kruse, Simon id: '65653' last_name: Kruse - first_name: Andreas full_name: Elsner, Andreas id: '16124' last_name: Elsner - first_name: Andreas full_name: Paul, Andreas id: '7828' last_name: Paul - first_name: Tina full_name: Kasper, Tina id: '94562' last_name: Kasper orcid: '0000-0003-3993-5316 ' citation: ama: 'Kruse S, Elsner A, Paul A, Kasper T. Anstieg der Energieaufnahme von Haushaltskältegeräten. In: ; 2024.' apa: Kruse, S., Elsner, A., Paul, A., & Kasper, T. (2024). Anstieg der Energieaufnahme von Haushaltskältegeräten. DKV-Tagung2024, Dresden. bibtex: '@inproceedings{Kruse_Elsner_Paul_Kasper_2024, title={Anstieg der Energieaufnahme von Haushaltskältegeräten}, author={Kruse, Simon and Elsner, Andreas and Paul, Andreas and Kasper, Tina}, year={2024} }' chicago: Kruse, Simon, Andreas Elsner, Andreas Paul, and Tina Kasper. “Anstieg der Energieaufnahme von Haushaltskältegeräten,” 2024. ieee: S. Kruse, A. Elsner, A. Paul, and T. Kasper, “Anstieg der Energieaufnahme von Haushaltskältegeräten,” presented at the DKV-Tagung2024, Dresden, 2024. mla: Kruse, Simon, et al. Anstieg der Energieaufnahme von Haushaltskältegeräten. 2024. short: 'S. Kruse, A. Elsner, A. Paul, T. Kasper, in: 2024.' conference: end_date: 2024-11-222 location: Dresden name: DKV-Tagung2024 start_date: 2024-11-20 date_created: 2025-01-02T11:42:01Z date_updated: 2025-09-24T13:42:03Z department: - _id: '728' - _id: '155' keyword: - Haushaltskältegeräte - Energieaufnahme - Alterung language: - iso: ger status: public title: Anstieg der Energieaufnahme von Haushaltskältegeräten type: conference_abstract user_id: '7828' year: '2024' ... --- _id: '58342' author: - first_name: Christoph full_name: Bode, Christoph last_name: Bode - first_name: Stefan full_name: Goetz, Stefan last_name: Goetz - first_name: Sandro full_name: Wartzack, Sandro last_name: Wartzack citation: ama: Bode C, Goetz S, Wartzack S. On the transferability of nominal surrogate models to uncertainty consideration of clinch joint characteristics. Procedia CIRP. 2024;129:151-156. doi:10.1016/j.procir.2024.10.027 apa: Bode, C., Goetz, S., & Wartzack, S. (2024). On the transferability of nominal surrogate models to uncertainty consideration of clinch joint characteristics. Procedia CIRP, 129, 151–156. https://doi.org/10.1016/j.procir.2024.10.027 bibtex: '@article{Bode_Goetz_Wartzack_2024, title={On the transferability of nominal surrogate models to uncertainty consideration of clinch joint characteristics}, volume={129}, DOI={10.1016/j.procir.2024.10.027}, journal={Procedia CIRP}, publisher={Elsevier BV}, author={Bode, Christoph and Goetz, Stefan and Wartzack, Sandro}, year={2024}, pages={151–156} }' chicago: 'Bode, Christoph, Stefan Goetz, and Sandro Wartzack. “On the Transferability of Nominal Surrogate Models to Uncertainty Consideration of Clinch Joint Characteristics.” Procedia CIRP 129 (2024): 151–56. https://doi.org/10.1016/j.procir.2024.10.027.' ieee: 'C. Bode, S. Goetz, and S. Wartzack, “On the transferability of nominal surrogate models to uncertainty consideration of clinch joint characteristics,” Procedia CIRP, vol. 129, pp. 151–156, 2024, doi: 10.1016/j.procir.2024.10.027.' mla: Bode, Christoph, et al. “On the Transferability of Nominal Surrogate Models to Uncertainty Consideration of Clinch Joint Characteristics.” Procedia CIRP, vol. 129, Elsevier BV, 2024, pp. 151–56, doi:10.1016/j.procir.2024.10.027. short: C. Bode, S. Goetz, S. Wartzack, Procedia CIRP 129 (2024) 151–156. date_created: 2025-01-23T13:53:59Z date_updated: 2025-10-01T14:32:26Z department: - _id: '157' doi: 10.1016/j.procir.2024.10.027 intvolume: ' 129' language: - iso: eng page: 151-156 project: - _id: '132' name: 'TRR 285 - B: TRR 285 - Project Area B' - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '144' name: TRR 285 - Subproject B05 publication: Procedia CIRP publication_identifier: issn: - 2212-8271 publication_status: published publisher: Elsevier BV status: public title: On the transferability of nominal surrogate models to uncertainty consideration of clinch joint characteristics type: journal_article user_id: '107109' volume: 129 year: '2024' ... --- _id: '62025' abstract: - lang: eng text: ABSTRACTThis paper deals with micromagnetic measurements for online detection of strain‐induced α′‐martensite during plastic deformation of metastable austenitic steel AISI 304L. The operating principles of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which are suitable for detection of microstructure evolution due to formation of ferromagnetic phases. The focus of this study was put on the qualification of different micromagnetic techniques and different measurement systems under conditions similar to the real ones during production, which is crucial for implementation of a property‐controlled flow forming process. The investigation was carried out on tubular specimens produced by flow forming, which have different content of α′‐martensite. To characterize the sensitivity of the sensors, different contact conditions between sensors and workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite, but the measurements are affected by the surface roughness. This entails that the calibration models for MBN sensors must take account of these effects. EC sensors show a closer match with the amount of α′‐martensite without having major affectation by other effects. article_number: e13070 author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Hanigah full_name: Kanagarajah, Hanigah last_name: Kanagarajah - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering Reports. 2024;7(1). doi:10.1002/eng2.13070 apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070 bibtex: '@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024, title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070}, number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }' chicago: Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070. ieee: 'J. Rozo Vasquez et al., “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>,” Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.' mla: Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070. short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024). date_created: 2025-10-30T12:25:57Z date_updated: 2025-10-30T12:54:40Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1002/eng2.13070 intvolume: ' 7' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1002/eng2.13070 oa: '1' publication: Engineering Reports publication_identifier: issn: - 2577-8196 - 2577-8196 publication_status: published publisher: Wiley status: public title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel AISI 304L type: journal_article user_id: '82875' volume: 7 year: '2024' ... --- _id: '62053' abstract: - lang: eng text: ABSTRACTThis paper deals with micromagnetic measurements for online detection of strain‐induced α′‐martensite during plastic deformation of metastable austenitic steel AISI 304L. The operating principles of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which are suitable for detection of microstructure evolution due to formation of ferromagnetic phases. The focus of this study was put on the qualification of different micromagnetic techniques and different measurement systems under conditions similar to the real ones during production, which is crucial for implementation of a property‐controlled flow forming process. The investigation was carried out on tubular specimens produced by flow forming, which have different content of α′‐martensite. To characterize the sensitivity of the sensors, different contact conditions between sensors and workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite, but the measurements are affected by the surface roughness. This entails that the calibration models for MBN sensors must take account of these effects. EC sensors show a closer match with the amount of α′‐martensite without having major affectation by other effects. article_number: e13070 author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Hanigah full_name: Kanagarajah, Hanigah last_name: Kanagarajah - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering Reports. 2024;7(1). doi:10.1002/eng2.13070 apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070 bibtex: '@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024, title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070}, number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }' chicago: Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070. ieee: 'J. Rozo Vasquez et al., “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>,” Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.' mla: Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070. short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024). date_created: 2025-11-03T10:28:12Z date_updated: 2025-11-03T10:29:18Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1002/eng2.13070 intvolume: ' 7' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1002/eng2.13070 oa: '1' publication: Engineering Reports publication_identifier: issn: - 2577-8196 - 2577-8196 publication_status: published publisher: Wiley status: public title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel AISI 304L type: journal_article user_id: '82875' volume: 7 year: '2024' ... --- _id: '56604' abstract: - lang: eng text: This manuscript makes the claim of having computed the 9th Dedekind number, D(9). This was done by accelerating the core operation of the process with an efficient FPGA design that outperforms an optimized 64-core CPU reference by 95x. The FPGA execution was parallelized on the Noctua 2 supercomputer at Paderborn University. The resulting value for D(9) is 286386577668298411128469151667598498812366. This value can be verified in two steps. We have made the data file containing the 490 M results available, each of which can be verified separately on CPU, and the whole file sums to our proposed value. The paper explains the mathematical approach in the first part, before putting the focus on a deep dive into the FPGA accelerator implementation followed by a performance analysis. The FPGA implementation was done in Register-Transfer Level using a dual-clock architecture and shows how we achieved an impressive FMax of 450 MHz on the targeted Stratix 10 GX 2,800 FPGAs. The total compute time used was 47,000 FPGA hours. author: - first_name: Lennart full_name: Van Hirtum, Lennart id: '100210' last_name: Van Hirtum - first_name: Patrick full_name: De Causmaecker, Patrick last_name: De Causmaecker - first_name: Jens full_name: Goemaere, Jens last_name: Goemaere - first_name: Tobias full_name: Kenter, Tobias id: '3145' last_name: Kenter - first_name: Heinrich full_name: Riebler, Heinrich id: '8961' last_name: Riebler - first_name: Michael full_name: Lass, Michael id: '24135' last_name: Lass orcid: 0000-0002-5708-7632 - first_name: Christian full_name: Plessl, Christian id: '16153' last_name: Plessl orcid: 0000-0001-5728-9982 citation: ama: Van Hirtum L, De Causmaecker P, Goemaere J, et al. A Computation of the Ninth Dedekind Number Using FPGA Supercomputing. ACM Transactions on Reconfigurable Technology and Systems. 2024;17(3):1-28. doi:10.1145/3674147 apa: Van Hirtum, L., De Causmaecker, P., Goemaere, J., Kenter, T., Riebler, H., Lass, M., & Plessl, C. (2024). A Computation of the Ninth Dedekind Number Using FPGA Supercomputing. ACM Transactions on Reconfigurable Technology and Systems, 17(3), 1–28. https://doi.org/10.1145/3674147 bibtex: '@article{Van Hirtum_De Causmaecker_Goemaere_Kenter_Riebler_Lass_Plessl_2024, title={A Computation of the Ninth Dedekind Number Using FPGA Supercomputing}, volume={17}, DOI={10.1145/3674147}, number={3}, journal={ACM Transactions on Reconfigurable Technology and Systems}, publisher={Association for Computing Machinery (ACM)}, author={Van Hirtum, Lennart and De Causmaecker, Patrick and Goemaere, Jens and Kenter, Tobias and Riebler, Heinrich and Lass, Michael and Plessl, Christian}, year={2024}, pages={1–28} }' chicago: 'Van Hirtum, Lennart, Patrick De Causmaecker, Jens Goemaere, Tobias Kenter, Heinrich Riebler, Michael Lass, and Christian Plessl. “A Computation of the Ninth Dedekind Number Using FPGA Supercomputing.” ACM Transactions on Reconfigurable Technology and Systems 17, no. 3 (2024): 1–28. https://doi.org/10.1145/3674147.' ieee: 'L. Van Hirtum et al., “A Computation of the Ninth Dedekind Number Using FPGA Supercomputing,” ACM Transactions on Reconfigurable Technology and Systems, vol. 17, no. 3, pp. 1–28, 2024, doi: 10.1145/3674147.' mla: Van Hirtum, Lennart, et al. “A Computation of the Ninth Dedekind Number Using FPGA Supercomputing.” ACM Transactions on Reconfigurable Technology and Systems, vol. 17, no. 3, Association for Computing Machinery (ACM), 2024, pp. 1–28, doi:10.1145/3674147. short: L. Van Hirtum, P. De Causmaecker, J. Goemaere, T. Kenter, H. Riebler, M. Lass, C. Plessl, ACM Transactions on Reconfigurable Technology and Systems 17 (2024) 1–28. date_created: 2024-10-14T07:38:29Z date_updated: 2025-11-04T09:53:26Z department: - _id: '27' - _id: '518' doi: 10.1145/3674147 intvolume: ' 17' issue: '3' language: - iso: eng main_file_link: - open_access: '1' oa: '1' page: 1-28 project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: ACM Transactions on Reconfigurable Technology and Systems publication_identifier: issn: - 1936-7406 - 1936-7414 publication_status: published publisher: Association for Computing Machinery (ACM) quality_controlled: '1' status: public title: A Computation of the Ninth Dedekind Number Using FPGA Supercomputing type: journal_article user_id: '3145' volume: 17 year: '2024' ... --- _id: '57311' article_type: original author: - first_name: Keke full_name: Yang, Keke id: '65085' last_name: Yang orcid: 0000-0001-9201-9304 - first_name: Matthias full_name: Sowada, Matthias id: '44475' last_name: Sowada - first_name: Viktoria full_name: Olfert, Viktoria id: '5974' last_name: Olfert - first_name: Georg full_name: Seitz, Georg last_name: Seitz - first_name: Vincent full_name: Schreiber, Vincent last_name: Schreiber - first_name: Marcel full_name: Heitmann, Marcel id: '38072' last_name: Heitmann orcid: 0009-0002-4181-8928 - first_name: David full_name: Hein, David id: '7728' last_name: Hein - first_name: Max full_name: Biegler, Max last_name: Biegler - first_name: Sven full_name: Jüttner, Sven last_name: Jüttner - 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, Sowada M, Olfert V, et al. Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study. Journal of Materials Research and Technology. Published online 2024. doi:10.1016/j.jmrt.2024.11.166' apa: 'Yang, K., Sowada, M., Olfert, V., Seitz, G., Schreiber, V., Heitmann, M., Hein, D., Biegler, M., Jüttner, S., Rethmeier, M., & Meschut, G. (2024). Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study. Journal of Materials Research and Technology. https://doi.org/10.1016/j.jmrt.2024.11.166' bibtex: '@article{Yang_Sowada_Olfert_Seitz_Schreiber_Heitmann_Hein_Biegler_Jüttner_Rethmeier_et al._2024, title={Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study}, DOI={10.1016/j.jmrt.2024.11.166}, journal={Journal of Materials Research and Technology}, publisher={Elsevier BV}, author={Yang, Keke and Sowada, Matthias and Olfert, Viktoria and Seitz, Georg and Schreiber, Vincent and Heitmann, Marcel and Hein, David and Biegler, Max and Jüttner, Sven and Rethmeier, Michael and et al.}, year={2024} }' chicago: 'Yang, Keke, Matthias Sowada, Viktoria Olfert, Georg Seitz, Vincent Schreiber, Marcel Heitmann, David Hein, et al. “Influence of Liquid Metal Embrittlement on the Failure Behavior of Dissimilar Spot Welds with Advanced High-Strength Steel: A Component Study.” Journal of Materials Research and Technology, 2024. https://doi.org/10.1016/j.jmrt.2024.11.166.' ieee: 'K. Yang et al., “Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study,” Journal of Materials Research and Technology, 2024, doi: 10.1016/j.jmrt.2024.11.166.' mla: 'Yang, Keke, et al. “Influence of Liquid Metal Embrittlement on the Failure Behavior of Dissimilar Spot Welds with Advanced High-Strength Steel: A Component Study.” Journal of Materials Research and Technology, Elsevier BV, 2024, doi:10.1016/j.jmrt.2024.11.166.' short: K. Yang, M. Sowada, V. Olfert, G. Seitz, V. Schreiber, M. Heitmann, D. Hein, M. Biegler, S. Jüttner, M. Rethmeier, G. Meschut, Journal of Materials Research and Technology (2024). date_created: 2024-11-21T14:25:40Z date_updated: 2025-11-10T14:20:05Z ddc: - '620' department: - _id: '157' doi: 10.1016/j.jmrt.2024.11.166 file: - access_level: closed content_type: application/pdf creator: kekeyang date_created: 2025-02-07T10:06:14Z date_updated: 2025-02-07T10:06:14Z file_id: '58533' file_name: KYA_VÖ5.pdf file_size: 10799297 relation: main_file success: 1 file_date_updated: 2025-02-07T10:06:14Z has_accepted_license: '1' language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: Journal of Materials Research and Technology publication_identifier: issn: - 2238-7854 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: 'Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study' type: journal_article user_id: '65085' year: '2024' ... --- _id: '56670' abstract: - lang: eng text: Systems Engineering is becoming increasingly important in the engineering of complex technical systems. Its introduction is forcing companies to undertake major transformation initiatives. As established change management approaches show, the corporate culture is an important key criterion for success of transformation. Therefore, when introducing Systems Engineering into an organization, transformation initiatives must be tailored to an existing corporate culture or the corporate culture itself must be changed in order to enable Systems Engineering. In literature and in industrial practice, different approaches for assessment of corporate culture exist. Within this research, a systematic literature review on methods and models for corporate culture assessment is conducted. Core elements are collected and combined with the fundamentals and success factors of Systems Engineering to develop a model for corporate culture assessment. The developed model is applied to the industrial practice of an ongoing Systems Engineering transformation of a large car manufacturer. The results of the assessment are compared with the emerging project challenges. Based on this model and its supporting tool and templates, organizations and transformation leaders are enabled to rapidly obtain an orientation of hindering or supporting currently established cultural aspects with regard to Systems Engineering transformation and to provide a decision basis for further measures. author: - first_name: Iris full_name: Graessler, Iris last_name: Graessler - first_name: Benedikt full_name: Grewe, Benedikt last_name: Grewe citation: ama: 'Graessler I, Grewe B. Importance of cultural change in Systems Engineering Transformation: A model for cultural assessment. In: AHFE International. Vol 158. AHFE International; 2024. doi:10.54941/ahfe1005551' apa: 'Graessler, I., & Grewe, B. (2024). Importance of cultural change in Systems Engineering Transformation: A model for cultural assessment. AHFE International, 158. https://doi.org/10.54941/ahfe1005551' bibtex: '@inproceedings{Graessler_Grewe_2024, title={Importance of cultural change in Systems Engineering Transformation: A model for cultural assessment}, volume={158}, DOI={10.54941/ahfe1005551}, booktitle={AHFE International}, publisher={AHFE International}, author={Graessler, Iris and Grewe, Benedikt}, year={2024} }' chicago: 'Graessler, Iris, and Benedikt Grewe. “Importance of Cultural Change in Systems Engineering Transformation: A Model for Cultural Assessment.” In AHFE International, Vol. 158. AHFE International, 2024. https://doi.org/10.54941/ahfe1005551.' ieee: 'I. Graessler and B. Grewe, “Importance of cultural change in Systems Engineering Transformation: A model for cultural assessment,” in AHFE International, 2024, vol. 158, doi: 10.54941/ahfe1005551.' mla: 'Graessler, Iris, and Benedikt Grewe. “Importance of Cultural Change in Systems Engineering Transformation: A Model for Cultural Assessment.” AHFE International, vol. 158, AHFE International, 2024, doi:10.54941/ahfe1005551.' short: 'I. Graessler, B. Grewe, in: AHFE International, AHFE International, 2024.' date_created: 2024-10-17T15:13:46Z date_updated: 2025-11-11T06:11:50Z department: - _id: '152' doi: 10.54941/ahfe1005551 intvolume: ' 158' language: - iso: eng main_file_link: - open_access: '1' url: https://openaccess.cms-conferences.org/publications/book/978-1-964867-34-2/article/978-1-964867-34-2_28 oa: '1' publication: AHFE International publication_identifier: issn: - 2771-0718 publication_status: published publisher: AHFE International quality_controlled: '1' status: public title: 'Importance of cultural change in Systems Engineering Transformation: A model for cultural assessment' type: conference user_id: '52359' volume: 158 year: '2024' ... --- _id: '56346' author: - first_name: Iris full_name: Gräßler, Iris id: '47565' last_name: Gräßler orcid: 0000-0001-5765-971X - first_name: Deniz full_name: Özcan, Deniz id: '58595' last_name: Özcan citation: ama: 'Gräßler I, Özcan D. Quality Key Figures for Developing Future Scenarios. In: AHFE International. Vol 158. AHFE International; 2024. doi:10.54941/ahfe1005553' apa: Gräßler, I., & Özcan, D. (2024). Quality Key Figures for Developing Future Scenarios. AHFE International, 158. https://doi.org/10.54941/ahfe1005553 bibtex: '@inproceedings{Gräßler_Özcan_2024, title={Quality Key Figures for Developing Future Scenarios}, volume={158}, DOI={10.54941/ahfe1005553}, booktitle={AHFE International}, publisher={AHFE International}, author={Gräßler, Iris and Özcan, Deniz}, year={2024} }' chicago: Gräßler, Iris, and Deniz Özcan. “Quality Key Figures for Developing Future Scenarios.” In AHFE International, Vol. 158. AHFE International, 2024. https://doi.org/10.54941/ahfe1005553. ieee: 'I. Gräßler and D. Özcan, “Quality Key Figures for Developing Future Scenarios,” in AHFE International, Split, 2024, vol. 158, doi: 10.54941/ahfe1005553.' mla: Gräßler, Iris, and Deniz Özcan. “Quality Key Figures for Developing Future Scenarios.” AHFE International, vol. 158, AHFE International, 2024, doi:10.54941/ahfe1005553. short: 'I. Gräßler, D. Özcan, in: AHFE International, AHFE International, 2024.' conference: end_date: 2024-09-26 location: Split name: '6th International Conference on Human Systems Engineering and Design (IHSED2024): Future Trends and Applications' start_date: 2024-09-24 date_created: 2024-10-07T07:33:08Z date_updated: 2025-11-13T16:42:28Z department: - _id: '43' - _id: '9' - _id: '26' - _id: '152' doi: 10.54941/ahfe1005553 intvolume: ' 158' language: - iso: eng publication: AHFE International publication_identifier: unknown: - 2771-0718 publication_status: published publisher: AHFE International quality_controlled: '1' status: public title: Quality Key Figures for Developing Future Scenarios type: conference user_id: '58595' volume: 158 year: '2024' ... --- _id: '62767' abstract: - lang: eng text: "Abstract\r\n In this study, we develop a novel multi-fidelity deep learning approach that transforms low-fidelity solution maps into high-fidelity ones by incorporating parametric space information into an autoencoder architecture. This method’s integration of parametric space information significantly reduces the amount of training data needed to effectively predict high-fidelity solutions from low-fidelity ones. In this study, we examine a two-dimensional steady-state heat transfer analysis within a heterogeneous materials microstructure. The heat conductivity coefficients for two different materials are condensed from a 101 \r\n \r\n \ $$\\times $$\r\n \r\n ×\r\n \ \r\n \r\n 101 grid to smaller grids. We then solve the boundary value problem on the coarsest grid using a pre-trained physics-informed neural operator network known as Finite Operator Learning (FOL). The resulting low-fidelity solution is subsequently upscaled back to a 101 \r\n \r\n $$\\times $$\r\n \r\n \ ×\r\n \r\n \r\n \ 101 grid using a newly designed enhanced autoencoder. The novelty of the developed enhanced autoencoder lies in the concatenation of heat conductivity maps of different resolutions to the decoder segment in distinct steps. Hence the developed algorithm is named microstructure-embedded autoencoder (MEA). We compare the MEA outcomes with those from finite element methods, the standard U-Net, and an interpolation approach as an upscaling technique. Our analysis shows that MEA outperforms these methods in terms of computational efficiency and error on representative test cases. As a result, the MEA serves as a potential supplement to neural operator networks, effectively upscaling low-fidelity solutions to high-fidelity while preserving critical details often lost in traditional upscaling methods, such as sharp interfaces features lost in the context of interpolation approaches." author: - first_name: Rasoul full_name: Najafi Koopas, Rasoul last_name: Najafi Koopas - first_name: Shahed full_name: Rezaei, Shahed last_name: Rezaei - first_name: Natalie full_name: Rauter, Natalie last_name: Rauter - first_name: Richard full_name: Ostwald, Richard id: '106876' last_name: Ostwald orcid: 0000-0003-2147-8444 - first_name: Rolf full_name: Lammering, Rolf last_name: Lammering citation: ama: Najafi Koopas R, Rezaei S, Rauter N, Ostwald R, Lammering R. Introducing a microstructure-embedded autoencoder approach for reconstructing high-resolution solution field data from a reduced parametric space. Computational Mechanics. 2024;75(4):1377-1406. doi:10.1007/s00466-024-02568-z apa: Najafi Koopas, R., Rezaei, S., Rauter, N., Ostwald, R., & Lammering, R. (2024). Introducing a microstructure-embedded autoencoder approach for reconstructing high-resolution solution field data from a reduced parametric space. Computational Mechanics, 75(4), 1377–1406. https://doi.org/10.1007/s00466-024-02568-z bibtex: '@article{Najafi Koopas_Rezaei_Rauter_Ostwald_Lammering_2024, title={Introducing a microstructure-embedded autoencoder approach for reconstructing high-resolution solution field data from a reduced parametric space}, volume={75}, DOI={10.1007/s00466-024-02568-z}, number={4}, journal={Computational Mechanics}, publisher={Springer Science and Business Media LLC}, author={Najafi Koopas, Rasoul and Rezaei, Shahed and Rauter, Natalie and Ostwald, Richard and Lammering, Rolf}, year={2024}, pages={1377–1406} }' chicago: 'Najafi Koopas, Rasoul, Shahed Rezaei, Natalie Rauter, Richard Ostwald, and Rolf Lammering. “Introducing a Microstructure-Embedded Autoencoder Approach for Reconstructing High-Resolution Solution Field Data from a Reduced Parametric Space.” Computational Mechanics 75, no. 4 (2024): 1377–1406. https://doi.org/10.1007/s00466-024-02568-z.' ieee: 'R. Najafi Koopas, S. Rezaei, N. Rauter, R. Ostwald, and R. Lammering, “Introducing a microstructure-embedded autoencoder approach for reconstructing high-resolution solution field data from a reduced parametric space,” Computational Mechanics, vol. 75, no. 4, pp. 1377–1406, 2024, doi: 10.1007/s00466-024-02568-z.' mla: Najafi Koopas, Rasoul, et al. “Introducing a Microstructure-Embedded Autoencoder Approach for Reconstructing High-Resolution Solution Field Data from a Reduced Parametric Space.” Computational Mechanics, vol. 75, no. 4, Springer Science and Business Media LLC, 2024, pp. 1377–406, doi:10.1007/s00466-024-02568-z. short: R. Najafi Koopas, S. Rezaei, N. Rauter, R. Ostwald, R. Lammering, Computational Mechanics 75 (2024) 1377–1406. date_created: 2025-12-03T12:37:08Z date_updated: 2025-12-03T12:51:26Z department: - _id: '952' - _id: '321' doi: 10.1007/s00466-024-02568-z intvolume: ' 75' issue: '4' language: - iso: eng page: 1377-1406 publication: Computational Mechanics publication_identifier: issn: - 0178-7675 - 1432-0924 publication_status: published publisher: Springer Science and Business Media LLC quality_controlled: '1' status: public title: Introducing a microstructure-embedded autoencoder approach for reconstructing high-resolution solution field data from a reduced parametric space type: journal_article user_id: '85414' volume: 75 year: '2024' ... --- _id: '62770' abstract: - lang: eng text: AbstractThe open-source parameter identification tool ADAPT (A diversely applicable parameter identification Tool) is integrated with a machine learning-based approach for start value prediction in order to calibrate a Gurson–Tvergaard–Needleman (GTN) and a Lemaitre damage model. As representative example case-hardened steel 16MnCrS5 is elaborated. An artificial neural network (ANN) is initially trained by using load–displacement curves derived from simulations of a boundary value problem—instead of using data generated for homogeneous states of deformation at material point or one-element level—with varying material parameter combinations. The ANN is then employed so as to predict sets of material parameters that already provide close solutions to the experiment. These predicted parameter sets serve as starting values for a subsequent multi-objective parameter identification by using ADAPT. ADAPT allows for the consideration of input data from multiple scales, including integral data such as load–displacement curves, full-field data such as displacement and strain fields, and high-resolution experimental void data at the micro-scale. The influence of each data set on prediction quality is analyzed. Using various types of input data introduces additional information, enhancing prediction accuracy. The validation is carried out with respect to experimental void measurements of forward rod extruded parts. The results demonstrate, by incorporating void measurements in the optimization process, that it is possible to improve the quantitative prediction of ductile damage in the sense of void area fractions by factor 28 in forward rod extrusion. author: - first_name: Jan full_name: Gerlach, Jan last_name: Gerlach - first_name: Robin full_name: Schulte, Robin last_name: Schulte - first_name: Alexander full_name: Schowtjak, Alexander last_name: Schowtjak - first_name: Till full_name: Clausmeyer, Till last_name: Clausmeyer - first_name: Richard full_name: Ostwald, Richard id: '106876' last_name: Ostwald orcid: 0000-0003-2147-8444 - first_name: A. Erman full_name: Tekkaya, A. Erman last_name: Tekkaya - first_name: Andreas full_name: Menzel, Andreas last_name: Menzel citation: ama: Gerlach J, Schulte R, Schowtjak A, et al. Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification. Archive of Applied Mechanics. 2024;94(8):2217-2242. doi:10.1007/s00419-024-02634-1 apa: Gerlach, J., Schulte, R., Schowtjak, A., Clausmeyer, T., Ostwald, R., Tekkaya, A. E., & Menzel, A. (2024). Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification. Archive of Applied Mechanics, 94(8), 2217–2242. https://doi.org/10.1007/s00419-024-02634-1 bibtex: '@article{Gerlach_Schulte_Schowtjak_Clausmeyer_Ostwald_Tekkaya_Menzel_2024, title={Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification}, volume={94}, DOI={10.1007/s00419-024-02634-1}, number={8}, journal={Archive of Applied Mechanics}, publisher={Springer Science and Business Media LLC}, author={Gerlach, Jan and Schulte, Robin and Schowtjak, Alexander and Clausmeyer, Till and Ostwald, Richard and Tekkaya, A. Erman and Menzel, Andreas}, year={2024}, pages={2217–2242} }' chicago: 'Gerlach, Jan, Robin Schulte, Alexander Schowtjak, Till Clausmeyer, Richard Ostwald, A. Erman Tekkaya, and Andreas Menzel. “Enhancing Damage Prediction in Bulk Metal Forming through Machine Learning-Assisted Parameter Identification.” Archive of Applied Mechanics 94, no. 8 (2024): 2217–42. https://doi.org/10.1007/s00419-024-02634-1.' ieee: 'J. Gerlach et al., “Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification,” Archive of Applied Mechanics, vol. 94, no. 8, pp. 2217–2242, 2024, doi: 10.1007/s00419-024-02634-1.' mla: Gerlach, Jan, et al. “Enhancing Damage Prediction in Bulk Metal Forming through Machine Learning-Assisted Parameter Identification.” Archive of Applied Mechanics, vol. 94, no. 8, Springer Science and Business Media LLC, 2024, pp. 2217–42, doi:10.1007/s00419-024-02634-1. short: J. Gerlach, R. Schulte, A. Schowtjak, T. Clausmeyer, R. Ostwald, A.E. Tekkaya, A. Menzel, Archive of Applied Mechanics 94 (2024) 2217–2242. date_created: 2025-12-03T12:46:31Z date_updated: 2025-12-03T12:50:41Z department: - _id: '952' - _id: '321' doi: 10.1007/s00419-024-02634-1 intvolume: ' 94' issue: '8' language: - iso: eng page: 2217-2242 publication: Archive of Applied Mechanics publication_identifier: issn: - 0939-1533 - 1432-0681 publication_status: published publisher: Springer Science and Business Media LLC quality_controlled: '1' status: public title: Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification type: journal_article user_id: '85414' volume: 94 year: '2024' ... --- _id: '62768' article_number: '110675' author: - first_name: Rasoul full_name: Najafi Koopas, Rasoul last_name: Najafi Koopas - first_name: Shahed full_name: Rezaei, Shahed last_name: Rezaei - first_name: Natalie full_name: Rauter, Natalie last_name: Rauter - first_name: Richard full_name: Ostwald, Richard id: '106876' last_name: Ostwald orcid: 0000-0003-2147-8444 - first_name: Rolf full_name: Lammering, Rolf last_name: Lammering citation: ama: 'Najafi Koopas R, Rezaei S, Rauter N, Ostwald R, Lammering R. A spatiotemporal deep learning framework for prediction of crack dynamics in heterogeneous solids: Efficient mapping of concrete microstructures to its fracture properties. Engineering Fracture Mechanics. 2024;314. doi:10.1016/j.engfracmech.2024.110675' apa: 'Najafi Koopas, R., Rezaei, S., Rauter, N., Ostwald, R., & Lammering, R. (2024). A spatiotemporal deep learning framework for prediction of crack dynamics in heterogeneous solids: Efficient mapping of concrete microstructures to its fracture properties. Engineering Fracture Mechanics, 314, Article 110675. https://doi.org/10.1016/j.engfracmech.2024.110675' bibtex: '@article{Najafi Koopas_Rezaei_Rauter_Ostwald_Lammering_2024, title={A spatiotemporal deep learning framework for prediction of crack dynamics in heterogeneous solids: Efficient mapping of concrete microstructures to its fracture properties}, volume={314}, DOI={10.1016/j.engfracmech.2024.110675}, number={110675}, journal={Engineering Fracture Mechanics}, publisher={Elsevier BV}, author={Najafi Koopas, Rasoul and Rezaei, Shahed and Rauter, Natalie and Ostwald, Richard and Lammering, Rolf}, year={2024} }' chicago: 'Najafi Koopas, Rasoul, Shahed Rezaei, Natalie Rauter, Richard Ostwald, and Rolf Lammering. “A Spatiotemporal Deep Learning Framework for Prediction of Crack Dynamics in Heterogeneous Solids: Efficient Mapping of Concrete Microstructures to Its Fracture Properties.” Engineering Fracture Mechanics 314 (2024). https://doi.org/10.1016/j.engfracmech.2024.110675.' ieee: 'R. Najafi Koopas, S. Rezaei, N. Rauter, R. Ostwald, and R. Lammering, “A spatiotemporal deep learning framework for prediction of crack dynamics in heterogeneous solids: Efficient mapping of concrete microstructures to its fracture properties,” Engineering Fracture Mechanics, vol. 314, Art. no. 110675, 2024, doi: 10.1016/j.engfracmech.2024.110675.' mla: 'Najafi Koopas, Rasoul, et al. “A Spatiotemporal Deep Learning Framework for Prediction of Crack Dynamics in Heterogeneous Solids: Efficient Mapping of Concrete Microstructures to Its Fracture Properties.” Engineering Fracture Mechanics, vol. 314, 110675, Elsevier BV, 2024, doi:10.1016/j.engfracmech.2024.110675.' short: R. Najafi Koopas, S. Rezaei, N. Rauter, R. Ostwald, R. Lammering, Engineering Fracture Mechanics 314 (2024). date_created: 2025-12-03T12:40:42Z date_updated: 2025-12-03T12:51:12Z department: - _id: '952' - _id: '321' doi: 10.1016/j.engfracmech.2024.110675 intvolume: ' 314' language: - iso: eng publication: Engineering Fracture Mechanics publication_identifier: issn: - 0013-7944 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: 'A spatiotemporal deep learning framework for prediction of crack dynamics in heterogeneous solids: Efficient mapping of concrete microstructures to its fracture properties' type: journal_article user_id: '85414' volume: 314 year: '2024' ... --- _id: '62999' abstract: - lang: eng text: PurposeAcademic research has intensively analyzed the relationship between market concentration or market power and banking stability but provides ambiguous results, which are summarized under the concentration-stability/fragility view. We provide empirical evidence that the mixed results are due to the difficulty of identifying reliable variables to measure concentration and market power.Design/methodology/approachUsing data from 3,943 banks operating in the European Union (EU)-15 between 2013 and 2020, we employ linear regression models on panel data. Banking market concentration is measured by the Herfindahl–Hirschman Index (HHI), and market power is estimated by the product-specific Lerner Indices for the loan and deposit market, respectively.FindingsOur analysis reveals a significantly stability-decreasing impact of market concentration (HHI) and a significantly stability-increasing effect of market power (Lerner Indices). In addition, we provide evidence for a weak (or even absent) empirical relationship between the (non)structural measures, challenging the validity of the structure-conduct-performance (SCP) paradigm. Our baseline findings remain robust, especially when controlling for a likely reverse causality.Originality/valueOur results suggest that the HHI may reflect other factors beyond market power that influence banking stability. Thus, banking supervisors and competition authorities should investigate market concentration and market power simultaneously while considering their joint impact on banking stability. author: - first_name: Sarah full_name: Herwald, Sarah id: '51867' last_name: Herwald - first_name: Simone full_name: Voigt, Simone id: '50109' last_name: Voigt - first_name: André full_name: Uhde, André id: '36049' last_name: Uhde citation: ama: Herwald S, Voigt S, Uhde A. The impact of market concentration and market power on banking stability – evidence from Europe. The Journal of Risk Finance. 2024;25(3):510-536. doi:10.1108/jrf-03-2023-0075 apa: Herwald, S., Voigt, S., & Uhde, A. (2024). The impact of market concentration and market power on banking stability – evidence from Europe. The Journal of Risk Finance, 25(3), 510–536. https://doi.org/10.1108/jrf-03-2023-0075 bibtex: '@article{Herwald_Voigt_Uhde_2024, title={The impact of market concentration and market power on banking stability – evidence from Europe}, volume={25}, DOI={10.1108/jrf-03-2023-0075}, number={3}, journal={The Journal of Risk Finance}, publisher={Emerald}, author={Herwald, Sarah and Voigt, Simone and Uhde, André}, year={2024}, pages={510–536} }' chicago: 'Herwald, Sarah, Simone Voigt, and André Uhde. “The Impact of Market Concentration and Market Power on Banking Stability – Evidence from Europe.” The Journal of Risk Finance 25, no. 3 (2024): 510–36. https://doi.org/10.1108/jrf-03-2023-0075.' ieee: 'S. Herwald, S. Voigt, and A. Uhde, “The impact of market concentration and market power on banking stability – evidence from Europe,” The Journal of Risk Finance, vol. 25, no. 3, pp. 510–536, 2024, doi: 10.1108/jrf-03-2023-0075.' mla: Herwald, Sarah, et al. “The Impact of Market Concentration and Market Power on Banking Stability – Evidence from Europe.” The Journal of Risk Finance, vol. 25, no. 3, Emerald, 2024, pp. 510–36, doi:10.1108/jrf-03-2023-0075. short: S. Herwald, S. Voigt, A. Uhde, The Journal of Risk Finance 25 (2024) 510–536. date_created: 2025-12-09T14:42:44Z date_updated: 2025-12-09T14:48:50Z department: - _id: '19' doi: 10.1108/jrf-03-2023-0075 intvolume: ' 25' issue: '3' language: - iso: eng page: 510-536 publication: The Journal of Risk Finance publication_identifier: issn: - 1526-5943 publication_status: published publisher: Emerald status: public title: The impact of market concentration and market power on banking stability – evidence from Europe type: journal_article user_id: '50109' volume: 25 year: '2024' ... --- _id: '63262' abstract: - lang: eng text: "AbstractRadially symmetric global unbounded solutions of the chemotaxis system

$$\\left\\{ {\\matrix{{{u_t} = \\nabla \\cdot (D(u)\\nabla u) - \\nabla \\cdot (uS(u)\\nabla v),} \\hfill & {} \\hfill \\cr {0 = \\Delta v - \\mu + u,} \\hfill & {\\mu = {1 \\over {|\\Omega |}}\\int_\\Omega {u,} } \\hfill \\cr } } \\right.$$

\r\n \r\n \ \r\n {\r\n \ \r\n \r\n \r\n \ \r\n \r\n \ \r\n u\r\n \ t\r\n \r\n \ =\r\n ∇\r\n \ ⋅\r\n (\r\n \ D\r\n (\r\n \ u\r\n )\r\n \ ∇\r\n u\r\n \ )\r\n −\r\n \ ∇\r\n ⋅\r\n \ (\r\n u\r\n \ S\r\n (\r\n \ u\r\n )\r\n \ ∇\r\n v\r\n \ )\r\n ,\r\n \ \r\n \r\n \ \r\n \r\n \ \r\n \r\n \ \r\n \r\n \ \r\n 0\r\n \ =\r\n Δ\r\n \ v\r\n −\r\n \ μ\r\n +\r\n \ u\r\n ,\r\n \ \r\n \r\n \ \r\n \r\n \ μ\r\n =\r\n \ \r\n 1\r\n \ \r\n |\r\n \ Ω\r\n |\r\n \ \r\n \r\n \ \r\n \r\n \ \r\n ∫\r\n \ Ω\r\n \r\n \ \r\n u\r\n \ ,\r\n \r\n \ \r\n \r\n \ \r\n \r\n \ \r\n \r\n \ \r\n \r\n \r\n \ are considered in a ball Ω = BR(0) ⊂ ℝn, where n ≥ 3 and R > 0.Under the assumption that D and S suitably generalize the prototypes given by D(ξ) = (ξ + ι)m−1 and S(ξ) = (ξ + 1)−λ−1 for all ξ > 0 and some m ∈ ℝ, λ >0 and ι ≥ 0 fulfilling

$$m + \\lambda < 1 - {2 \\over n}$$

\r\n \ m\r\n +\r\n \ λ\r\n <\r\n \ 1\r\n −\r\n \ \r\n 2\r\n n\r\n \ \r\n , a considerably large set of initial data u0 is found to enforce a complete mass aggregation in infinite time in the sense that for any such u0, an associated Neumann type initial-boundary value problem admits a global classical solution (u, v) satisfying

$${1 \\over C} \\cdot {(t + 1)^{{1 \\over \\lambda }}} \\le ||u( \\cdot ,t)|{|_{{L^\\infty }(\\Omega )}} \\le C \\cdot {(t + 1)^{{1 \\over \\lambda }}}\\,\\,\\,{\\rm{for}}\\,\\,{\\rm{all}}\\,\\,t > 0$$

\r\n \ \r\n \r\n 1\r\n \ C\r\n \r\n \ \r\n ⋅\r\n \r\n \ (\r\n t\r\n \ +\r\n 1\r\n \ \r\n )\r\n \ \r\n \r\n \r\n \ 1\r\n λ\r\n \ \r\n \r\n \ \r\n \r\n \r\n \ ≤\r\n \r\n |\r\n \ \r\n \r\n |\r\n \ \r\n u\r\n (\r\n \ ⋅\r\n ,\r\n \ t\r\n )\r\n \ \r\n |\r\n \r\n \ \r\n \r\n \r\n \ |\r\n \r\n \ \r\n \r\n \r\n \ L\r\n ∞\r\n \ \r\n \r\n \ (\r\n Ω\r\n \ )\r\n \r\n \ \r\n \r\n ≤\r\n \ C\r\n ⋅\r\n \ \r\n (\r\n t\r\n \ +\r\n 1\r\n \ \r\n )\r\n \ \r\n \r\n \r\n \ 1\r\n λ\r\n \ \r\n \r\n \ \r\n \r\n \r\n \ \r\n \r\n \r\n \ \r\n \r\n f\r\n \ o\r\n r\r\n \ \r\n \r\n \r\n \ \r\n \r\n \r\n \ a\r\n l\r\n \ l\r\n \r\n \ \r\n \r\n \r\n \ t\r\n >\r\n \ 0\r\n as well as

$$||u( \\cdot \\,,t)|{|_{{L^1}(\\Omega \\backslash {B_{{r_0}}}(0))}} \\to 0\\,\\,\\,{\\rm{as}}\\,\\,t \\to \\infty \\,\\,\\,{\\rm{for}}\\,\\,{\\rm{all}}\\,\\,{r_0} \\in (0,R)$$

\r\n |\r\n \ |\r\n u\r\n \ (\r\n ⋅\r\n \ ,\r\n t\r\n \ )\r\n |\r\n \ \r\n |\r\n \r\n \ \r\n L\r\n \ 1\r\n \r\n \ (\r\n Ω\r\n \ \\\r\n \r\n \ B\r\n \r\n \ \r\n r\r\n \ 0\r\n \r\n \ \r\n \r\n (\r\n \ 0\r\n )\r\n \ )\r\n \r\n \ \r\n →\r\n 0\r\n \ as\r\n t\r\n \ →\r\n ∞\r\n \ for all\r\n \r\n \ r\r\n 0\r\n \ \r\n ∈\r\n (\r\n \ 0\r\n ,\r\n \ R\r\n )\r\n \ with some C > 0." author: - first_name: Michael full_name: Winkler, Michael id: '31496' last_name: Winkler citation: ama: Winkler M. Complete infinite-time mass aggregation in a quasilinear Keller–Segel system. Israel Journal of Mathematics. 2024;263(1):93-127. doi:10.1007/s11856-024-2618-9 apa: Winkler, M. (2024). Complete infinite-time mass aggregation in a quasilinear Keller–Segel system. Israel Journal of Mathematics, 263(1), 93–127. https://doi.org/10.1007/s11856-024-2618-9 bibtex: '@article{Winkler_2024, title={Complete infinite-time mass aggregation in a quasilinear Keller–Segel system}, volume={263}, DOI={10.1007/s11856-024-2618-9}, number={1}, journal={Israel Journal of Mathematics}, publisher={Springer Science and Business Media LLC}, author={Winkler, Michael}, year={2024}, pages={93–127} }' chicago: 'Winkler, Michael. “Complete Infinite-Time Mass Aggregation in a Quasilinear Keller–Segel System.” Israel Journal of Mathematics 263, no. 1 (2024): 93–127. https://doi.org/10.1007/s11856-024-2618-9.' ieee: 'M. Winkler, “Complete infinite-time mass aggregation in a quasilinear Keller–Segel system,” Israel Journal of Mathematics, vol. 263, no. 1, pp. 93–127, 2024, doi: 10.1007/s11856-024-2618-9.' mla: Winkler, Michael. “Complete Infinite-Time Mass Aggregation in a Quasilinear Keller–Segel System.” Israel Journal of Mathematics, vol. 263, no. 1, Springer Science and Business Media LLC, 2024, pp. 93–127, doi:10.1007/s11856-024-2618-9. short: M. Winkler, Israel Journal of Mathematics 263 (2024) 93–127. date_created: 2025-12-18T19:08:34Z date_updated: 2025-12-18T20:14:59Z doi: 10.1007/s11856-024-2618-9 intvolume: ' 263' issue: '1' language: - iso: eng page: 93-127 publication: Israel Journal of Mathematics publication_identifier: issn: - 0021-2172 - 1565-8511 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Complete infinite-time mass aggregation in a quasilinear Keller–Segel system type: journal_article user_id: '31496' volume: 263 year: '2024' ... --- _id: '63346' abstract: - lang: eng text: Lightweight design by using low-density and load-adapted materials can reduce the weight of vehicles and the emissions generated during operation. However, the usage of different materials requires innovative joining technologies with increased versatility. In this investigation, the focus is on describing and characterising the failure behaviour of connections manufactured by an innovative thermomechanical joining process with adaptable auxiliary joining elements in single-lap tensile-shear tests. In order to analyse the failure development in detail, the specimens are investigated using in-situ computed tomography (in-situ CT). Here, the tensile-shear test is interrupted at points of interest and CT scans are conducted under load. In addition, the interrupted in-situ testing procedure is validated by comparing the loading behaviour with conventional continuous tensile-shear tests. The results of the in-situ investigations of joints with varying material combinations clearly describe the cause of failure, allowing conclusions towards an improved joint design. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: D full_name: Köhler, D last_name: Köhler - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: R full_name: Kupfer, R last_name: Kupfer - first_name: J full_name: Troschitz, J last_name: Troschitz - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: M full_name: Gude, M last_name: Gude citation: ama: 'Borgert T, Köhler D, Wiens E, et al. In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2024;238(12):2299-2306. doi:10.1177/14644207241232233' apa: 'Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W., & Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 238(12), 2299–2306. https://doi.org/10.1177/14644207241232233' bibtex: '@article{Borgert_Köhler_Wiens_Kupfer_Troschitz_Homberg_Gude_2024, title={In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element}, volume={238}, DOI={10.1177/14644207241232233}, number={12}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Borgert, Thomas and Köhler, D and Wiens, Eugen and Kupfer, R and Troschitz, J and Homberg, Werner and Gude, M}, year={2024}, pages={2299–2306} }' chicago: 'Borgert, Thomas, D Köhler, Eugen Wiens, R Kupfer, J Troschitz, Werner Homberg, and M Gude. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238, no. 12 (2024): 2299–2306. https://doi.org/10.1177/14644207241232233.' ieee: 'T. Borgert et al., “In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, pp. 2299–2306, 2024, doi: 10.1177/14644207241232233.' mla: 'Borgert, Thomas, et al. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024, pp. 2299–306, doi:10.1177/14644207241232233.' short: 'T. Borgert, D. Köhler, E. Wiens, R. Kupfer, J. Troschitz, W. Homberg, M. Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238 (2024) 2299–2306.' date_created: 2025-12-19T09:13:30Z date_updated: 2025-12-22T10:40:28Z department: - _id: '156' doi: 10.1177/14644207241232233 intvolume: ' 238' issue: '12' language: - iso: eng page: 2299-2306 publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element type: journal_article user_id: '7888' volume: 238 year: '2024' ... --- _id: '56289' author: - first_name: Karl full_name: Seeger, Karl last_name: Seeger - first_name: Matteo full_name: Genovese, Matteo last_name: Genovese - first_name: Alexander full_name: Schlüter, Alexander id: '103302' last_name: Schlüter orcid: 0000-0002-2569-1624 - first_name: Christina full_name: Kockel, Christina last_name: Kockel - first_name: Orlando full_name: Corigliano, Orlando last_name: Corigliano - first_name: Edith Benjamina full_name: Díaz Canales, Edith Benjamina id: '105704' last_name: Díaz Canales orcid: 0009-0007-2748-0074 - first_name: Petronilla full_name: Fragiacomo, Petronilla last_name: Fragiacomo - first_name: Aaron full_name: Praktiknjo, Aaron last_name: Praktiknjo citation: ama: Seeger K, Genovese M, Schlüter A, et al. Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment. United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series. Published online 2024. apa: Seeger, K., Genovese, M., Schlüter, A., Kockel, C., Corigliano, O., Díaz Canales, E. B., Fragiacomo, P., & Praktiknjo, A. (2024). Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment. In United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series. Elsevier BV. bibtex: '@article{Seeger_Genovese_Schlüter_Kockel_Corigliano_Díaz Canales_Fragiacomo_Praktiknjo_2024, title={Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment}, journal={United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series}, publisher={Elsevier BV}, author={Seeger, Karl and Genovese, Matteo and Schlüter, Alexander and Kockel, Christina and Corigliano, Orlando and Díaz Canales, Edith Benjamina and Fragiacomo, Petronilla and Praktiknjo, Aaron}, year={2024} }' chicago: Seeger, Karl, Matteo Genovese, Alexander Schlüter, Christina Kockel, Orlando Corigliano, Edith Benjamina Díaz Canales, Petronilla Fragiacomo, and Aaron Praktiknjo. “Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment.” United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series. Elsevier BV, 2024. ieee: K. Seeger et al., “Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment,” United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series. Elsevier BV, 2024. mla: Seeger, Karl, et al. “Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment.” United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series, Elsevier BV, 2024. short: K. Seeger, M. Genovese, A. Schlüter, C. Kockel, O. Corigliano, E.B. Díaz Canales, P. Fragiacomo, A. Praktiknjo, United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series (2024). date_created: 2024-10-01T09:34:06Z date_updated: 2026-01-06T08:00:25Z department: - _id: '876' - _id: '9' - _id: '393' - _id: '321' external_id: unknown: - https://dx.doi.org/10.2139/ssrn.4966589 language: - iso: eng main_file_link: - open_access: '1' url: https://dx.doi.org/10.2139/ssrn.4966589 oa: '1' publication: United States Association for Energy Economics (USAEE) & International Association for Energy Economics (IAEE) Research Paper Series publication_status: published publisher: Elsevier BV status: public title: Evaluating Supply Scenarios for Hydrogen and Green Fuels from Canada, Chile, and Algeria to Germany via a Techno-Economic Assessment type: preprint user_id: '103302' year: '2024' ... --- _id: '56357' alternative_title: - SDEWES2024.1202 author: - first_name: Edith Benjamina full_name: Díaz Canales, Edith Benjamina id: '105704' last_name: Díaz Canales orcid: 0009-0007-2748-0074 - first_name: Alfredo full_name: Avila , Alfredo last_name: 'Avila ' - first_name: 'Sabine ' full_name: 'Schlüter, Sabine ' last_name: Schlüter - first_name: Erick full_name: Lacayo, Erick last_name: Lacayo - first_name: Alexander full_name: Schlüter, Alexander id: '103302' last_name: Schlüter orcid: 0000-0002-2569-1624 citation: ama: 'Díaz Canales EB, Avila A, Schlüter S, Lacayo E, Schlüter A. Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study. In: 19th Conference on Sustainable Development of Energy, Water and Environment Systems. Digital Proceedings (Conference on Sustainable Development of Energy, Water and Environment Systems). Faculty of Mechanical Engineering and Naval Architecture, Zagreb; 2024.' apa: 'Díaz Canales, E. B., Avila , A., Schlüter, S., Lacayo, E., & Schlüter, A. (2024). Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study. 19th Conference on Sustainable Development of Energy, Water and Environment Systems. 19th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES), Rome.' bibtex: '@inproceedings{Díaz Canales_Avila _Schlüter_Lacayo_Schlüter_2024, series={Digital Proceedings (Conference on Sustainable Development of Energy, Water and Environment Systems)}, title={Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study.}, booktitle={19th Conference on Sustainable Development of Energy, Water and Environment Systems}, publisher={ Faculty of Mechanical Engineering and Naval Architecture, Zagreb}, author={Díaz Canales, Edith Benjamina and Avila , Alfredo and Schlüter, Sabine and Lacayo, Erick and Schlüter, Alexander}, year={2024}, collection={Digital Proceedings (Conference on Sustainable Development of Energy, Water and Environment Systems)} }' chicago: 'Díaz Canales, Edith Benjamina, Alfredo Avila , Sabine Schlüter, Erick Lacayo, and Alexander Schlüter. “Implementing Strategic Environmental Assessment (SEA) in the Global South, a Challenge: Nicaragua as a Case Study.” In 19th Conference on Sustainable Development of Energy, Water and Environment Systems. Digital Proceedings (Conference on Sustainable Development of Energy, Water and Environment Systems). Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2024.' ieee: 'E. B. Díaz Canales, A. Avila , S. Schlüter, E. Lacayo, and A. Schlüter, “Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study.,” presented at the 19th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES), Rome, 2024.' mla: 'Díaz Canales, Edith Benjamina, et al. “Implementing Strategic Environmental Assessment (SEA) in the Global South, a Challenge: Nicaragua as a Case Study.” 19th Conference on Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2024.' short: 'E.B. Díaz Canales, A. Avila , S. Schlüter, E. Lacayo, A. Schlüter, in: 19th Conference on Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2024.' conference: end_date: 2024-09-12 location: Rome name: 19th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES) start_date: 2024-09-08 date_created: 2024-10-07T10:15:05Z date_updated: 2026-01-06T08:14:34Z department: - _id: '876' - _id: '321' - _id: '9' - _id: '393' language: - iso: eng publication: 19th Conference on Sustainable Development of Energy, Water and Environment Systems publication_identifier: unknown: - 2706-3690 publisher: ' Faculty of Mechanical Engineering and Naval Architecture, Zagreb' series_title: Digital Proceedings (Conference on Sustainable Development of Energy, Water and Environment Systems) status: public title: 'Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study.' type: conference user_id: '103302' year: '2024' ... --- _id: '64977' author: - first_name: Katharina Ulrike full_name: Mersch, Katharina Ulrike id: '125834' last_name: Mersch orcid: 0009-0003-0843-1868 citation: ama: 'Mersch KU. Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5. Deutsches Archiv für Erforschung des Mittelalters. 2024;80(2):722.' apa: 'Mersch, K. U. (2024). Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5. In Deutsches Archiv für Erforschung des Mittelalters (Vol. 80, Issue 2, p. 722).' bibtex: '@article{Mersch_2024, title={Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5}, volume={80}, number={2}, journal={Deutsches Archiv für Erforschung des Mittelalters}, author={Mersch, Katharina Ulrike}, year={2024}, pages={722} }' chicago: 'Mersch, Katharina Ulrike. “Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5.” Deutsches Archiv für Erforschung des Mittelalters, 2024.' ieee: 'K. U. Mersch, “Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5,” Deutsches Archiv für Erforschung des Mittelalters, vol. 80, no. 2. p. 722, 2024.' mla: 'Mersch, Katharina Ulrike. “Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5.” Deutsches Archiv für Erforschung des Mittelalters, vol. 80, no. 2, 2024, p. 722.' short: K.U. Mersch, Deutsches Archiv für Erforschung des Mittelalters 80 (2024) 722. date_created: 2026-03-15T16:23:16Z date_updated: 2026-03-15T16:23:23Z extern: '1' intvolume: ' 80' issue: '2' language: - iso: ger main_file_link: - url: https://www.mgh-bibliothek.de/da/img/da802_55.pdf page: '722' publication: Deutsches Archiv für Erforschung des Mittelalters publication_status: published status: public title: 'Brown, Warren: Beyond the Monastery Walls. 2023, xiv, 385 S.: Illustrationen, Karten. - ISBN 978-1-108-47958-5' type: review user_id: '125834' volume: 80 year: '2024' ... --- _id: '65052' author: - first_name: Mirko full_name: Albrecht, Mirko last_name: Albrecht - first_name: Max Oliver full_name: Bialaschik, Max Oliver id: '32297' last_name: Bialaschik - first_name: Michael full_name: Gehde, Michael last_name: Gehde - first_name: Volker full_name: Schöppner, Volker id: '20530' last_name: Schöppner citation: ama: 'Albrecht M, Bialaschik MO, Gehde M, Schöppner V. Serial hot gas welding - Heating and welding behaviour of a slot nozzle. In: AIP Conference Proceedings. Vol 3181. AIP Publishing; 2024. doi:10.1063/5.0192316' apa: Albrecht, M., Bialaschik, M. O., Gehde, M., & Schöppner, V. (2024). Serial hot gas welding - Heating and welding behaviour of a slot nozzle. AIP Conference Proceedings, 3181. https://doi.org/10.1063/5.0192316 bibtex: '@inproceedings{Albrecht_Bialaschik_Gehde_Schöppner_2024, title={Serial hot gas welding - Heating and welding behaviour of a slot nozzle}, volume={3181}, DOI={10.1063/5.0192316}, booktitle={AIP Conference Proceedings}, publisher={AIP Publishing}, author={Albrecht, Mirko and Bialaschik, Max Oliver and Gehde, Michael and Schöppner, Volker}, year={2024} }' chicago: Albrecht, Mirko, Max Oliver Bialaschik, Michael Gehde, and Volker Schöppner. “Serial Hot Gas Welding - Heating and Welding Behaviour of a Slot Nozzle.” In AIP Conference Proceedings, Vol. 3181. AIP Publishing, 2024. https://doi.org/10.1063/5.0192316. ieee: 'M. Albrecht, M. O. Bialaschik, M. Gehde, and V. Schöppner, “Serial hot gas welding - Heating and welding behaviour of a slot nozzle,” in AIP Conference Proceedings, 2024, vol. 3181, doi: 10.1063/5.0192316.' mla: Albrecht, Mirko, et al. “Serial Hot Gas Welding - Heating and Welding Behaviour of a Slot Nozzle.” AIP Conference Proceedings, vol. 3181, AIP Publishing, 2024, doi:10.1063/5.0192316. short: 'M. Albrecht, M.O. Bialaschik, M. Gehde, V. Schöppner, in: AIP Conference Proceedings, AIP Publishing, 2024.' date_created: 2026-03-18T12:24:07Z date_updated: 2026-03-18T12:24:42Z department: - _id: '9' - _id: '321' - _id: '367' doi: 10.1063/5.0192316 intvolume: ' 3181' language: - iso: eng publication: AIP Conference Proceedings publication_identifier: issn: - 0094-243X publication_status: published publisher: AIP Publishing quality_controlled: '1' status: public title: Serial hot gas welding - Heating and welding behaviour of a slot nozzle type: conference user_id: '59363' volume: 3181 year: '2024' ... --- _id: '56654' abstract: - lang: eng text: Residual stresses in directly joined laminates made of steel and carbon fiber reinforced epoxy resin reduce the interface and bond strength and thus have to be taken into account for the strength analysis of structural components. For a holistic description of residual stresses, a thermo-chemo-mechanical constitutive model is introduced in the present work and presented for the multi-scale analysis of residual stress patterns. In this context, the analysis of representative unit cells with regular and stochastic distribution of fibers gives information about the associated deformation and stress fields. Dehomogenization at macroscopically highly stressed regions, characterized by local stress peaks, reveals the effect of gradient deformation in the microstructure. Another aspect of this work is the development of FFT-based Galerkin methods, which allows an evaluation of the effect of defect densities, heterogeneities and morphologies on the applicability of the incremental hole drilling method. It could be demonstrated that the incremental hole drilling method is particularly sensitive to defects running along the surface. - lang: ger text: Eigenspannungen in direktgefügten Werkstoffverbunden aus Stahl und kohlenstofffaserverstärktem Epoxidharz reduzieren die Grenzschicht- und Verbundfestigkeit und sind somit für die Festigkeitsbeurteilung von Strukturen zwingend zu berücksichtigen. Zur ganzheitlichen Beschreibung von Eigenspannungen wird in der vorliegenden Arbeit ein thermo-chemo-mechanisches Konstitutivmodell für die skalenübergreifende Bewertung von Eigenspannungsverteilungen vorgestellt. Die Analyse von repräsentativen Einheitszellen mit regulärer und stochastischer Verteilung von Fasern liefert in diesem Zusammenhang Informationen über die zugehörigen Deformations- und Spannungsfelder. Die Dehomogenisierung an makroskopisch hochbelasteten Bereichen, die durch lokale Spannungsüberhöhungen gekennzeichnet sind, zeigt die Auswirkung der gradientenbehafteten Deformation in der Mikrostruktur. Ein weiterer Aspekt dieser Arbeit ist die Entwicklung FFT-basierter Galerkin-Methoden, die es erstmalig erlauben, eine Bewertung der Auswirkung von Defektdichte, Heterogenität und Morphologie auf die Anwendbarkeit der inkrementellen Bohrlochmethode vorzunehmen. Es konnte nachgewiesen werden, dass die inkrementelle Bohrlochmethode insbesondere auf an der Oberfläche verlaufende Defekte sensitiv reagiert. author: - first_name: Steffen Rainer full_name: Tinkloh, Steffen Rainer last_name: Tinkloh citation: ama: Tinkloh SR. Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden. BoD - Books on Demand; 2024. apa: Tinkloh, S. R. (2024). Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden. BoD - Books on Demand. bibtex: '@book{Tinkloh_2024, title={Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden}, publisher={BoD - Books on Demand}, author={Tinkloh, Steffen Rainer}, year={2024} }' chicago: Tinkloh, Steffen Rainer. Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden. BoD - Books on Demand, 2024. ieee: S. R. Tinkloh, Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden. BoD - Books on Demand, 2024. mla: Tinkloh, Steffen Rainer. Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden. BoD - Books on Demand, 2024. short: S.R. Tinkloh, Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden, BoD - Books on Demand, 2024. date_created: 2024-10-17T07:56:02Z date_updated: 2026-03-19T10:57:29Z department: - _id: '9' - _id: '149' - _id: '321' extern: '1' keyword: - Hybride Werkstoffverbunde - Eigenspanungen - FFT-basierte Galerkin-Methode - Mikromechanik - Finite-Elemente-Methode language: - iso: ger page: '168' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication_identifier: isbn: - '9783757887650' publication_status: published publisher: BoD - Books on Demand status: public supervisor: - first_name: Thomas full_name: Tröster, Thomas last_name: Tröster - first_name: Thomas full_name: Niendorf, Thomas last_name: Niendorf title: Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden type: dissertation user_id: '71335' year: '2024' ... --- _id: '57699' abstract: - lang: eng text: The optimization of process parameters in powder Directed Energy Deposition (DED) is essential for achieving consistent, high-quality bead geometries, which directly influence the performance and structural integrity of fabricated components. As a subset of additive manufacturing (AM), the DED process, also referred to as laser metal deposition (LMD), enables precise, layer-by-layer material deposition, making it highly suitable for complex geometries and part repair applications. Critical parameters, such as the laser power, feed rate, powder mass flow, and substrate temperature govern the deposition process, impacting the bead height, width, contact angle, and dilution. Inconsistent control over these variables can lead to defects, such as poor bonding, dimensional inaccuracies, and material weaknesses, ultimately compromising the final product. This paper investigates the effects of various process parameters, specifically the substrate temperature, on bead track geometry in DED processes for stainless steel (1.4404). A specialized experimental setup, integrated within a DED machine, facilitates the controlled thermal conditioning of sample sheets. Using Design of Experiments (DoE) methods, individual bead marks are generated and analyzed to assess geometric characteristics. Regression models, including both linear and quadratic approaches, are constructed to predict machine parameters for achieving the desired bead geometry at different substrate temperatures. Validation experiments confirm the accuracy and reliability of the models, particularly in predicting the bead height, bead width, and contact angle across a broad range of substrate temperatures. However, the models demonstrated limitations in accurately predicting dilution, indicating the need for further refinement. Despite some deviations in measured values, successful fabrication is achieved, demonstrating robust bonding between the bead and substrate. The developed models offer insights into optimizing DED process parameters to achieve desired bead characteristics, advancing the precision and reliability of additive manufacturing technology. Future work will focus on refining the regression models to improve predictions, particularly for dilution, and further investigate non-linear interactions between process variables. article_number: '1353' article_type: original author: - first_name: Deviprasad full_name: Chalicheemalapalli Jayasankar, Deviprasad id: '49504' last_name: Chalicheemalapalli Jayasankar orcid: https://orcid.org/ 0000-0002-3446-2444 - first_name: Stefan full_name: Gnaase, Stefan id: '25730' last_name: Gnaase - first_name: Dennis full_name: Lehnert, Dennis id: '90491' last_name: Lehnert - first_name: Artur full_name: Walter, Artur last_name: Walter - first_name: Robin full_name: Rohling, Robin last_name: Rohling - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster citation: ama: 'Chalicheemalapalli Jayasankar D, Gnaase S, Lehnert D, Walter A, Rohling R, Tröster T. Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling. Metals. 2024;14(12). doi:10.3390/met14121353' apa: 'Chalicheemalapalli Jayasankar, D., Gnaase, S., Lehnert, D., Walter, A., Rohling, R., & Tröster, T. (2024). Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling. Metals, 14(12), Article 1353. https://doi.org/10.3390/met14121353' bibtex: '@article{Chalicheemalapalli Jayasankar_Gnaase_Lehnert_Walter_Rohling_Tröster_2024, title={Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling}, volume={14}, DOI={10.3390/met14121353}, number={121353}, journal={Metals}, publisher={MDPI AG}, author={Chalicheemalapalli Jayasankar, Deviprasad and Gnaase, Stefan and Lehnert, Dennis and Walter, Artur and Rohling, Robin and Tröster, Thomas}, year={2024} }' chicago: 'Chalicheemalapalli Jayasankar, Deviprasad, Stefan Gnaase, Dennis Lehnert, Artur Walter, Robin Rohling, and Thomas Tröster. “Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling.” Metals 14, no. 12 (2024). https://doi.org/10.3390/met14121353.' ieee: 'D. Chalicheemalapalli Jayasankar, S. Gnaase, D. Lehnert, A. Walter, R. Rohling, and T. Tröster, “Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling,” Metals, vol. 14, no. 12, Art. no. 1353, 2024, doi: 10.3390/met14121353.' mla: 'Chalicheemalapalli Jayasankar, Deviprasad, et al. “Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling.” Metals, vol. 14, no. 12, 1353, MDPI AG, 2024, doi:10.3390/met14121353.' short: D. Chalicheemalapalli Jayasankar, S. Gnaase, D. Lehnert, A. Walter, R. Rohling, T. Tröster, Metals 14 (2024). date_created: 2024-12-10T12:13:23Z date_updated: 2026-03-20T08:44:28Z ddc: - '670' department: - _id: '321' - _id: '149' - _id: '9' doi: 10.3390/met14121353 has_accepted_license: '1' intvolume: ' 14' issue: '12' keyword: - additive manufacturing - direct energy deposition - laser metal deposition language: - iso: eng main_file_link: - open_access: '1' url: https://www.mdpi.com/2075-4701/14/12/1353 oa: '1' publication: Metals publication_identifier: issn: - 2075-4701 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: 'Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling' type: journal_article user_id: '49504' volume: 14 year: '2024' ...