--- _id: '64678' abstract: - lang: eng text: "One of the major topics in the modern automotive industry is reducing emissions and increasing the mileage\r\nrange. To tackle this challenge, on the one hand, modifying the powertrain system is a possibility, and on the\r\nother hand, lightweight design offers various possibilities. Multi-Material Design (MMD) involves designing car\r\nbodies that combine different materials that require joining. Given the variety of materials, mechanical joining\r\nprocesses are preferred. Especially the current development of the Giga/Mega-casting process concerning\r\naluminium casting and the subsequent mechanical joining illustrates the challenges of this material group. In car\r\nproduction, aluminium castings are mainly made from aluminium-silicon (AlSi) alloys. Ultimately, the alloy\r\nsystem's insufficient ductility leads to crack initiation during mechanical joining. Cast parts are therefore often\r\nused in areas of the car body that are exposed to high-pressure loads. For example, self-piercing riveting (SPR) is\r\nused due to its high load-bearing capacity. In this study, improved joinability is demonstrated by influencing the\r\nmicrostructure through tailored solidification rates and a developed heat-treatment chain strategy adapted for\r\nhypoeutectic AlSi systems. Data on microstructure, mechanical, and joining properties are used to develop a\r\nsolidification-joining correlation for the SPR process across a range of Si contents and solidification rates. The\r\npurpose is to develop the ability to produce suitable aluminium castings with sufficient joinability, thereby\r\nimproving versatility." article_type: original author: - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Pia Katharina full_name: Kaimann, Pia Katharina id: '44935' last_name: Kaimann - first_name: Ina full_name: Stratmann, Ina last_name: Stratmann - first_name: Mathias full_name: Bobbert, Mathias id: '7850' last_name: Bobbert - first_name: Johann Moritz Benedikt full_name: Klöckner, Johann Moritz Benedikt last_name: Klöckner - first_name: Moritz full_name: Mann, Moritz last_name: Mann - first_name: Kay-Peter full_name: Hoyer, Kay-Peter id: '48411' last_name: Hoyer - first_name: Gerson full_name: Meschut, Gerson id: '32056' last_name: Meschut orcid: 0000-0002-2763-1246 - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: Neuser M, Kaimann PK, Stratmann I, et al. Solidification-joinability correlation of hypoeutectic aluminium casting alloys for self-piercing riveting (SPR). Journal of Manufacturing Processes. 2026;164. doi:https://doi.org/10.1016/j.jmapro.2026.02.040 apa: Neuser, M., Kaimann, P. K., Stratmann, I., Bobbert, M., Klöckner, J. M. B., Mann, M., Hoyer, K.-P., Meschut, G., & Schaper, M. (2026). Solidification-joinability correlation of hypoeutectic aluminium casting alloys for self-piercing riveting (SPR). Journal of Manufacturing Processes, 164. https://doi.org/10.1016/j.jmapro.2026.02.040 bibtex: '@article{Neuser_Kaimann_Stratmann_Bobbert_Klöckner_Mann_Hoyer_Meschut_Schaper_2026, title={Solidification-joinability correlation of hypoeutectic aluminium casting alloys for self-piercing riveting (SPR)}, volume={164}, DOI={https://doi.org/10.1016/j.jmapro.2026.02.040}, journal={Journal of Manufacturing Processes}, publisher={Elsevier}, author={Neuser, Moritz and Kaimann, Pia Katharina and Stratmann, Ina and Bobbert, Mathias and Klöckner, Johann Moritz Benedikt and Mann, Moritz and Hoyer, Kay-Peter and Meschut, Gerson and Schaper, Mirko}, year={2026} }' chicago: Neuser, Moritz, Pia Katharina Kaimann, Ina Stratmann, Mathias Bobbert, Johann Moritz Benedikt Klöckner, Moritz Mann, Kay-Peter Hoyer, Gerson Meschut, and Mirko Schaper. “Solidification-Joinability Correlation of Hypoeutectic Aluminium Casting Alloys for Self-Piercing Riveting (SPR).” Journal of Manufacturing Processes 164 (2026). https://doi.org/10.1016/j.jmapro.2026.02.040. ieee: 'M. Neuser et al., “Solidification-joinability correlation of hypoeutectic aluminium casting alloys for self-piercing riveting (SPR),” Journal of Manufacturing Processes, vol. 164, 2026, doi: https://doi.org/10.1016/j.jmapro.2026.02.040.' mla: Neuser, Moritz, et al. “Solidification-Joinability Correlation of Hypoeutectic Aluminium Casting Alloys for Self-Piercing Riveting (SPR).” Journal of Manufacturing Processes, vol. 164, Elsevier, 2026, doi:https://doi.org/10.1016/j.jmapro.2026.02.040. short: M. Neuser, P.K. Kaimann, I. Stratmann, M. Bobbert, J.M.B. Klöckner, M. Mann, K.-P. Hoyer, G. Meschut, M. Schaper, Journal of Manufacturing Processes 164 (2026). date_created: 2026-02-26T11:21:24Z date_updated: 2026-02-26T11:22:03Z department: - _id: '43' - _id: '158' - _id: '157' - _id: '321' doi: https://doi.org/10.1016/j.jmapro.2026.02.040 funded_apc: '1' intvolume: ' 164' keyword: - Mechanical joining - Aluminium - Self-piercing riveting - Casting - Microstructure - Joinability AlSi-alloys language: - iso: eng project: - _id: '131' name: TRR 285 - Project Area A - _id: '133' name: TRR 285 - Project Area C - _id: '136' name: TRR 285 - Subproject A02 - _id: '146' name: TRR 285 - Subproject C02 - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' publication: Journal of Manufacturing Processes publication_status: published publisher: Elsevier quality_controlled: '1' status: public title: Solidification-joinability correlation of hypoeutectic aluminium casting alloys for self-piercing riveting (SPR) type: journal_article user_id: '32340' volume: 164 year: '2026' ... --- _id: '65311' abstract: - lang: eng text: Information Systems (IS) is rooted in systems theory. Systems theory offers powerful concepts to address challenges of growing system complexity and non-systemic design approaches in information systems. Despite its systemic origins, systems theory remains a peripheral topic in IS. The study addresses this gap by introducing a comprehensive framework of 52 systems-theoretical concepts to guide the design of complex IS artifacts. We synthesize scattered systems knowledge from diverse disciplines to provide a unified level of abstraction for complex information system design. We apply the framework to a use case of business reputation systems to show how the systems lens informs the design of a novel, complex information system. We make three key contributions to the literature. First, the framework provides a common ground for interdisciplinary research in information system design. Second, it offers a unified level of abstraction grounded in systems theory that serves as a coherent basis for artifact design. Third, it demonstrates the potential of systems theory as a foundational justificatory knowledge base. Furthermore, we provide guidance on applying the framework across multiple modes of reasoning, alongside further application guidelines. The study thus serves as a bridge between the body of systems knowledge and contextual design in IS. alternative_title: - Design Your System article_type: review author: - first_name: Ulvi full_name: Ibrahimli, Ulvi last_name: Ibrahimli - first_name: Simon full_name: Hemmrich, Simon last_name: Hemmrich - first_name: Axel full_name: Winkelmann, Axel last_name: Winkelmann citation: ama: 'Ibrahimli U, Hemmrich S, Winkelmann A. Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems. Communication of the Association for Information Systems. Published online 2026. doi:https://aisel.aisnet.org/cais/vol58/iss1/37/' apa: 'Ibrahimli, U., Hemmrich, S., & Winkelmann, A. (2026). Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems. Communication of the Association for Information Systems. https://aisel.aisnet.org/cais/vol58/iss1/37/' bibtex: '@article{Ibrahimli_Hemmrich_Winkelmann_2026, title={Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems}, DOI={https://aisel.aisnet.org/cais/vol58/iss1/37/}, journal={Communication of the Association for Information Systems}, publisher={AIS}, author={Ibrahimli, Ulvi and Hemmrich, Simon and Winkelmann, Axel}, year={2026} }' chicago: 'Ibrahimli, Ulvi, Simon Hemmrich, and Axel Winkelmann. “Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems.” Communication of the Association for Information Systems, 2026. https://aisel.aisnet.org/cais/vol58/iss1/37/.' ieee: 'U. Ibrahimli, S. Hemmrich, and A. Winkelmann, “Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems,” Communication of the Association for Information Systems, 2026, doi: https://aisel.aisnet.org/cais/vol58/iss1/37/.' mla: 'Ibrahimli, Ulvi, et al. “Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems.” Communication of the Association for Information Systems, AIS, 2026, doi:https://aisel.aisnet.org/cais/vol58/iss1/37/.' short: U. Ibrahimli, S. Hemmrich, A. Winkelmann, Communication of the Association for Information Systems (2026). date_created: 2026-04-02T04:19:09Z date_updated: 2026-04-02T04:32:05Z department: - _id: '195' doi: https://aisel.aisnet.org/cais/vol58/iss1/37/ extern: '1' external_id: unknown: - https://aisel.aisnet.org/cais/vol58/iss1/37/ jel: - D83 - L14 - D83 - O33 - C63 - P keyword: - Information Systems Research - Systems Theory - System Complexity - System Design - Design Science language: - iso: eng publication: Communication of the Association for Information Systems publication_identifier: unknown: - 1529-3181 publication_status: published publisher: AIS quality_controlled: '1' status: public title: 'Bridging Systems Theory and Information Systems: A Framework for Designing Complex Information Systems' type: journal_article user_id: '83557' year: '2026' ... --- _id: '65310' abstract: - lang: eng text: "Trust between client and consultant is perhaps the most important asset in con-sulting, as this is a highly intangible knowledge-intensive business that concerns is-sues of outstanding strategic and operational importance for the customers. Cli-ents who have not worked with a particular consultancy face considerable risk when they place an order while lacking reliable information about the service quality they can expect. There is a strong link between trust and reputation, as the positive reputation of a consultancy can act as a substitute for a new client’s missing individual experience with the provider, fostering trust in the service quali-ty. Thus, creating, maintaining, and demonstrating a good reputation is of signifi-cant importance for consultancies in a very competitive industry.\r\nTo facilitate trustworthy signals, we design and implement a novel reputation mechanism that carries a monetary weight stored on a blockchain network as an immutable, decentralized, and transparent ledger. Based on an implementation in the Ethereum network and subsequent evaluation, we conclude that the reputation mechanism can contribute to leveling information asymmetry and reducing risk while increasing reputation and trust. The mechanism lends itself to being used in other business-to-business scenarios that suffer from similar information asymmetries." author: - first_name: Simon full_name: Hemmrich, Simon id: '83557' last_name: Hemmrich - first_name: Volker full_name: Nissen, Volker last_name: Nissen citation: ama: 'Hemmrich S, Nissen V. A blockchain-based reputation system for consulting. In: Nissen V, ed. Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer. ; 2026.' apa: Hemmrich, S., & Nissen, V. (2026). A blockchain-based reputation system for consulting. In V. Nissen (Ed.), Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer. bibtex: '@inbook{Hemmrich_Nissen_2026, title={A blockchain-based reputation system for consulting}, booktitle={ Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer.}, author={Hemmrich, Simon and Nissen, Volker}, editor={Nissen, Volker}, year={2026} }' chicago: Hemmrich, Simon, and Volker Nissen. “A Blockchain-Based Reputation System for Consulting.” In Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer., edited by Volker Nissen, 2026. ieee: S. Hemmrich and V. Nissen, “A blockchain-based reputation system for consulting,” in Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer., V. Nissen, Ed. 2026. mla: Hemmrich, Simon, and Volker Nissen. “A Blockchain-Based Reputation System for Consulting.” Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer., edited by Volker Nissen, 2026. short: 'S. Hemmrich, V. Nissen, in: V. Nissen (Ed.), Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer., 2026.' date_created: 2026-04-02T04:06:47Z date_updated: 2026-04-02T04:32:01Z department: - _id: '195' editor: - first_name: Volker full_name: Nissen, Volker last_name: Nissen extern: '1' keyword: - Reputation Systems - Consulting - Design Science Invention - Incentive - Blockchain - Monetary ratings - building trust - reduce information asymmetry consulting - B2B reputation system - consulting risk reduction - supplier evaluation system language: - iso: eng publication: ' Advanced Studies in Consulting Research and Digitalization – A Scientific Update on the Digital Transformation of the Consulting Industry. Springer.' publication_identifier: unknown: - 978-3032173836 publication_status: published quality_controlled: '1' status: public title: A blockchain-based reputation system for consulting type: book_chapter user_id: '83557' year: '2026' ... --- _id: '65476' abstract: - lang: eng text: Service research has evolved into an interdisciplinary research field that bridges diverse disciplines, including information systems (IS) and marketing. Nearly two decades ago, the service system concept was introduced as a foundational abstraction in service research, drawing on ideas from the service-dominant logic (S-D logic) of marketing. Despite its widespread adoption in service research, particularly in the IS discipline, the service system concept lacks a solid theoretical foundation. This has resulted in conceptual ambiguity and overlap with related constructs, such as service ecosystems. Moreover, it has largely remained a static analytical lens, insufficiently capturing dynamic service phenomena, including value co-creation and co-destruction, as well as the emergence of institutional arrangements. To address these limitations, we propose Luhmann’s systems theory (LST) as a robust framework for conceptualizing service systems as autopoietic (self-creating) systems, in which communication serves as the fundamental mechanism that drives value co-creation. We derive five theoretical propositions from this re-conceptualization that clarify conceptual ambiguity and allow researchers to explore dynamic service phenomena in greater depth. Given LST’s general approach, our conceptualization provides a theoretically grounded, interdisciplinary foundation for advancing service research. article_number: '37' article_type: original author: - first_name: Daniel full_name: Beverungen, Daniel last_name: Beverungen - first_name: Jens full_name: Poeppelbuss, Jens last_name: Poeppelbuss - first_name: Simon full_name: Hemmrich, Simon last_name: Hemmrich - first_name: Taskeen full_name: Iqbal, Taskeen last_name: Iqbal citation: ama: Beverungen D, Poeppelbuss J, Hemmrich S, Iqbal T. Service through communication—Conceptualizing service systems with Luhmann’s systems theory. Electronic Markets. 2026;36(1). doi:10.1007/s12525-026-00889-w apa: Beverungen, D., Poeppelbuss, J., Hemmrich, S., & Iqbal, T. (2026). Service through communication—Conceptualizing service systems with Luhmann’s systems theory. Electronic Markets, 36(1), Article 37. https://doi.org/10.1007/s12525-026-00889-w bibtex: '@article{Beverungen_Poeppelbuss_Hemmrich_Iqbal_2026, title={Service through communication—Conceptualizing service systems with Luhmann’s systems theory}, volume={36}, DOI={10.1007/s12525-026-00889-w}, number={137}, journal={Electronic Markets}, publisher={Springer Science and Business Media LLC}, author={Beverungen, Daniel and Poeppelbuss, Jens and Hemmrich, Simon and Iqbal, Taskeen}, year={2026} }' chicago: Beverungen, Daniel, Jens Poeppelbuss, Simon Hemmrich, and Taskeen Iqbal. “Service through Communication—Conceptualizing Service Systems with Luhmann’s Systems Theory.” Electronic Markets 36, no. 1 (2026). https://doi.org/10.1007/s12525-026-00889-w. ieee: 'D. Beverungen, J. Poeppelbuss, S. Hemmrich, and T. Iqbal, “Service through communication—Conceptualizing service systems with Luhmann’s systems theory,” Electronic Markets, vol. 36, no. 1, Art. no. 37, 2026, doi: 10.1007/s12525-026-00889-w.' mla: Beverungen, Daniel, et al. “Service through Communication—Conceptualizing Service Systems with Luhmann’s Systems Theory.” Electronic Markets, vol. 36, no. 1, 37, Springer Science and Business Media LLC, 2026, doi:10.1007/s12525-026-00889-w. short: D. Beverungen, J. Poeppelbuss, S. Hemmrich, T. Iqbal, Electronic Markets 36 (2026). date_created: 2026-04-21T13:13:02Z date_updated: 2026-06-11T13:18:09Z ddc: - '380' department: - _id: '195' - _id: '534' doi: 10.1007/s12525-026-00889-w file: - access_level: closed content_type: application/pdf creator: dabe date_created: 2026-04-21T13:14:30Z date_updated: 2026-04-21T13:14:30Z file_id: '65477' file_name: Service is Communication - EM Paper.pdf file_size: 2793039 relation: main_file success: 1 file_date_updated: 2026-04-21T13:14:30Z has_accepted_license: '1' intvolume: ' 36' issue: '1' jel: - L80 keyword: - Service system - Service ecosystem - Systems theory - Service research language: - iso: eng main_file_link: - open_access: '1' url: https://link.springer.com/content/pdf/10.1007/s12525-026-00889-w.pdf oa: '1' project: - _id: '1250' name: 'SHAPE : Gestaltung von Dienstleistungsentwicklungsprozessen und lnnovationspartnerschaften mit Unternehmen' publication: Electronic Markets publication_identifier: issn: - 1019-6781 - 1422-8890 publication_status: published publisher: Springer Science and Business Media LLC quality_controlled: '1' status: public title: Service through communication—Conceptualizing service systems with Luhmann’s systems theory type: journal_article user_id: '59677' volume: 36 year: '2026' ... --- _id: '66001' abstract: - lang: eng text: Expanding renewable energy sources is essential for a sustainable energy supply but challenges grid stability, as the volatility of solar and wind causes periods of over- and undersupply. Private households are central to this transition, combining dynamic consumption with decentralised generation. This paper presents a multi-agent microgrid simulation built on the Mesa framework, focusing on the heterogeneous objectives and technological capabilities of residential participants. Households are modelled as autonomous agents with individual strategies, while a dedicated “grid agent” represents the distribution system operator and regulates the microgrid in a grid-supportive manner. The emission factor serves as the key indicator for grid-friendly behaviour. Results show that in summer, unmanaged PV feed-in from heterogeneous households causes substantial grid stress and balancing effort for the distribution system operator. Dynamic electricity prices can incentivise grid-friendly dispatch, but their effectiveness depends on the correlation between price signals and renewable availability and cannot guarantee grid-supportive behaviour alone. The grid agent reliably improves the grid-supportive coefficient, yet its operating strategy, for instance additional peak-reduction objectives, can interfere with price-based incentives. Effective demand-side management therefore requires careful analysis of stakeholder interactions. Building on this insight, thepaper provides a basic framework for the design, implementation, and assessment of both integrated and individual energy management strategies within a microgrid environment. By simulating the dynamic interactions among system participants and strategies, it enables comprehensive evaluation of their collective impact on the grid, supporting the development of robust solutions for future electricity networks. author: - first_name: Kevin full_name: Henne, Kevin id: '56918' last_name: Henne - first_name: Henning Christoph full_name: Rahlf, Henning Christoph id: '56955' last_name: Rahlf orcid: 0009-0006-8106-2132 - first_name: Marius full_name: Naumann, Marius id: '94950' last_name: Naumann - first_name: Henning full_name: Meschede, Henning id: '86954' last_name: Meschede orcid: 0000-0002-1538-089X citation: ama: 'Henne K, Rahlf HC, Naumann M, Meschede H. Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach. Energy Conversion and Management: X. 2026;31:102030. doi:https://doi.org/10.1016/j.ecmx.2026.102030' apa: 'Henne, K., Rahlf, H. C., Naumann, M., & Meschede, H. (2026). Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach. Energy Conversion and Management: X, 31, 102030. https://doi.org/10.1016/j.ecmx.2026.102030' bibtex: '@article{Henne_Rahlf_Naumann_Meschede_2026, title={Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach}, volume={31}, DOI={https://doi.org/10.1016/j.ecmx.2026.102030}, journal={Energy Conversion and Management: X}, publisher={Elsevier}, author={Henne, Kevin and Rahlf, Henning Christoph and Naumann, Marius and Meschede, Henning}, year={2026}, pages={102030} }' chicago: 'Henne, Kevin, Henning Christoph Rahlf, Marius Naumann, and Henning Meschede. “Towards Stakeholder-Aware Demand-Side Management Assessment in Heterogeneous Residential Microgrids: A Multi-Agent Approach.” Energy Conversion and Management: X 31 (2026): 102030. https://doi.org/10.1016/j.ecmx.2026.102030.' ieee: 'K. Henne, H. C. Rahlf, M. Naumann, and H. Meschede, “Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach,” Energy Conversion and Management: X, vol. 31, p. 102030, 2026, doi: https://doi.org/10.1016/j.ecmx.2026.102030.' mla: 'Henne, Kevin, et al. “Towards Stakeholder-Aware Demand-Side Management Assessment in Heterogeneous Residential Microgrids: A Multi-Agent Approach.” Energy Conversion and Management: X, vol. 31, Elsevier, 2026, p. 102030, doi:https://doi.org/10.1016/j.ecmx.2026.102030.' short: 'K. Henne, H.C. Rahlf, M. Naumann, H. Meschede, Energy Conversion and Management: X 31 (2026) 102030.' conference: end_date: 2025-10-10 location: Dubrovnik name: 20th SDEWES conference start_date: 2025-10-05 date_created: 2026-06-19T12:27:48Z date_updated: 2026-06-19T12:41:33Z department: - _id: '644' doi: https://doi.org/10.1016/j.ecmx.2026.102030 has_accepted_license: '1' intvolume: ' 31' keyword: - Microgrid - Decentralised Energy Systems - Multi-Agent System - Residential Demand-Side Management - Optimisation language: - iso: eng page: '102030' publication: 'Energy Conversion and Management: X' publication_identifier: issn: - 2590-1745 publication_status: published publisher: Elsevier status: public title: 'Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach' type: journal_article user_id: '56918' volume: 31 year: '2026' ... --- _id: '58763' abstract: - lang: eng text: Utilizing data is crucial for economic success, but a lack of interoperability and concerns about the misuse of ones own data are hindering the cross-organizational use of data. Dataspaces provide the infrastructure necessary to integrate heterogeneous data sources within an organization or ecosystem, enabling seamless data interaction and interoperability. In addition, data spaces strengthen data sovereignty through their decentralized nature, which enables organizations to effectively control and manage their data. However, challenges persist in managing the complexity and dynamic nature of dataspaces, requiring significant resources and technical expertise. The decentralized nature leads to a large and diverse number of stakeholders, who need to agree on the use and scope of a dataspace. Modeling is a common approach to cope with technical complexity and heterogeneous stakeholders. In this paper, we propose a version of SysML and a corresponding method that focus on the modelling of data spaces. We provide a dataspace modelling method to unify the understanding of dataspaces and scope among all stakeholders to simplify the design and development process. author: - first_name: Pranav Jayant full_name: Kulkarni, Pranav Jayant id: '86782' last_name: Kulkarni - first_name: Julian full_name: Zerbin, Julian id: '51711' last_name: Zerbin - first_name: Christian full_name: Koldewey, Christian id: '43136' last_name: Koldewey orcid: https://orcid.org/0000-0001-7992-6399 - first_name: Ruslan full_name: Bernijazov, Ruslan id: '36312' last_name: Bernijazov - first_name: Roman full_name: Dumitrescu, Roman id: '16190' last_name: Dumitrescu citation: ama: 'Kulkarni PJ, Zerbin J, Koldewey C, Bernijazov R, Dumitrescu R. Using SysML as a Modelling Language for Dataspaces. In: 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD). IEEE; 2025. doi:10.1109/ictmod63116.2024.10878227' apa: Kulkarni, P. J., Zerbin, J., Koldewey, C., Bernijazov, R., & Dumitrescu, R. (2025). Using SysML as a Modelling Language for Dataspaces. 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD). 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD), Sharjah, United Arab Emirates . https://doi.org/10.1109/ictmod63116.2024.10878227 bibtex: '@inproceedings{Kulkarni_Zerbin_Koldewey_Bernijazov_Dumitrescu_2025, title={Using SysML as a Modelling Language for Dataspaces}, DOI={10.1109/ictmod63116.2024.10878227}, booktitle={2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD)}, publisher={IEEE}, author={Kulkarni, Pranav Jayant and Zerbin, Julian and Koldewey, Christian and Bernijazov, Ruslan and Dumitrescu, Roman}, year={2025} }' chicago: Kulkarni, Pranav Jayant, Julian Zerbin, Christian Koldewey, Ruslan Bernijazov, and Roman Dumitrescu. “Using SysML as a Modelling Language for Dataspaces.” In 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD). IEEE, 2025. https://doi.org/10.1109/ictmod63116.2024.10878227. ieee: 'P. J. Kulkarni, J. Zerbin, C. Koldewey, R. Bernijazov, and R. Dumitrescu, “Using SysML as a Modelling Language for Dataspaces,” presented at the 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD), Sharjah, United Arab Emirates , 2025, doi: 10.1109/ictmod63116.2024.10878227.' mla: Kulkarni, Pranav Jayant, et al. “Using SysML as a Modelling Language for Dataspaces.” 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD), IEEE, 2025, doi:10.1109/ictmod63116.2024.10878227. short: 'P.J. Kulkarni, J. Zerbin, C. Koldewey, R. Bernijazov, R. Dumitrescu, in: 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD), IEEE, 2025.' conference: end_date: 2024-11-06 location: 'Sharjah, United Arab Emirates ' name: 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD) start_date: 2024-11-04 date_created: 2025-02-21T15:25:13Z date_updated: 2026-01-30T09:05:24Z department: - _id: '563' doi: 10.1109/ictmod63116.2024.10878227 keyword: - Dataspaces - Modelling - SysML - Gaia-X - System Specification language: - iso: eng publication: 2024 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD) publication_status: published publisher: IEEE quality_controlled: '1' status: public title: Using SysML as a Modelling Language for Dataspaces type: conference user_id: '51711' year: '2025' ... --- _id: '62725' abstract: - lang: ger text: "Aluminium-Silizium-Legierungen (AlSi) werden insbesondere bei der gießtechnischen\r\nHerstellung von Leichtbaukomponenten für Fahrzeuge verwendet. Dieses Legierungssystem hat hervorragende\r\nGießeigenschaften bei gleichzeitig akzeptablen mechanischen Eigenschaften. Aufgrund des hohen\r\nSilizium-(Si)-Gehaltes, wodurch die Volumenkontraktion im Phasenübergang von flüssig-fest nahezu\r\nunterbunden wird, neigen AlSi-Legierungen dazu, feinere oder gröbere Si-Platten bei unterschiedlichen\r\nErstarrungsgeschwindigkeiten zu bilden. Um die mechanischen Eigenschaften zu verbessern, werden\r\ndem Legierungssystem in der Schmelzphase entweder Natrium (Na) oder Strontium (Sr) zugesetzt. Dies\r\nhat zur Folge, dass sich eine fein lamellare Si-Morphologie bei der Erstarrung ausbildet; dies kann ebenfalls\r\ndurch hohe Erstarrungsgeschwindigkeiten erreicht werden. Ein nachfolgendes Lösungsglühen bewirkt\r\neine Sphäroidisierung der Si-Partikel und dient der Steigerung der Duktilität. Aktuell fehlen fundierte\r\nErkenntnisse zur Ausprägung der Si-Morphologie in Abhängigkeit der Erstarrungsgeschwindigkeit oder\r\ninfolge einer Wärmebehandlung. Vor diesem Hintergrund werden in dieser Studie verschiedene Behandlungsparameter\r\nin Bezug auf das Einformverhalten der Si-Partikel mit einem bildauswertenden Verfahren\r\nevaluiert sowie unter Bezug auf verschiedene chemische Zusammensetzungen miteinander korreliert." - lang: eng text: "Aluminium-silicon alloys (AlSi) are used in the casting of lightweight vehicle components. This\r\nalloy system has excellent casting properties accompanied by acceptable mechanical properties. Due to\r\nthe high silicon (Si) content, which almost completely prevents volume contraction during the liquid-solid\r\nphase transition, AlSi alloys tend to form finer or coarser Si plates at different solidification rates. To\r\nimprove the mechanical properties, either sodium (Na) or strontium (Sr) is added to the alloy system in\r\nthe melting phase. This results in the formation of a fine lamellar Si morphology during solidification, which\r\ncan also be achieved by high solidification rates. Subsequent solution annealing causes spheroidisation\r\nof the Si particles and increases ductility. Currently, there is a lack in scientific knowledge regarding the\r\nSi-morphology as a function of solidification rate or as a result of heat treatment. Therefore, this study\r\nevaluates various treatment parameters in relation to the shaping behaviour of Si particles using an image\r\nanalysis method and correlates them with different chemical compositions." alternative_title: - Image analysis method for evaluating the microstructure of AlSi-alloys author: - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Gerrit full_name: Cichon, Gerrit last_name: Cichon - first_name: Kay-Peter full_name: Hoyer, Kay-Peter id: '48411' last_name: Hoyer - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: 'Neuser M, Cichon G, Hoyer K-P, Schaper M. Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. In: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. Vol 43. Deutsche Gesellschaft für Materialkunde (DGM); 2025:454-459.' apa: Neuser, M., Cichon, G., Hoyer, K.-P., & Schaper, M. (2025). Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen. Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, 43, 454–459. bibtex: '@inproceedings{Neuser_Cichon_Hoyer_Schaper_2025, place={Sankt Augustin}, title={Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen}, volume={43}, booktitle={Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen}, publisher={Deutsche Gesellschaft für Materialkunde (DGM)}, author={Neuser, Moritz and Cichon, Gerrit and Hoyer, Kay-Peter and Schaper, Mirko}, year={2025}, pages={454–459} }' chicago: 'Neuser, Moritz, Gerrit Cichon, Kay-Peter Hoyer, and Mirko Schaper. “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen.” In Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, 43:454–59. Sankt Augustin: Deutsche Gesellschaft für Materialkunde (DGM), 2025.' ieee: M. Neuser, G. Cichon, K.-P. Hoyer, and M. Schaper, “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen,” in Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, Dresden, 2025, vol. 43, pp. 454–459. mla: Neuser, Moritz, et al. “Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen.” Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, vol. 43, Deutsche Gesellschaft für Materialkunde (DGM), 2025, pp. 454–59. short: 'M. Neuser, G. Cichon, K.-P. Hoyer, M. Schaper, in: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen, Deutsche Gesellschaft für Materialkunde (DGM), Sankt Augustin, 2025, pp. 454–459.' conference: end_date: 2025-11-28 location: Dresden name: Werkstoffprüfung - 43. Vortrags- und Diskussionstagung Werkstoffprüfung 2025 start_date: 2025-11-27 date_created: 2025-12-01T13:46:42Z date_updated: 2025-12-01T13:46:53Z department: - _id: '43' - _id: '9' - _id: '158' - _id: '321' intvolume: ' 43' keyword: - Bildauswertendes Verfahren - Mikrostrukturanalyse - AlSi-System - Si-Morphologie language: - iso: ger page: 454 - 459 place: Sankt Augustin project: - _id: '130' name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten' - _id: '131' name: TRR 285 - Project Area A - _id: '136' name: TRR 285 - Subproject A02 publication: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen publication_identifier: isbn: - 978-3-88355-454-9 publication_status: published publisher: Deutsche Gesellschaft für Materialkunde (DGM) quality_controlled: '1' status: public title: Bildauswertendes Verfahren zur Evaluierung der Mikrostruktur von AlSi-Systemen type: conference user_id: '32340' volume: 43 year: '2025' ... --- _id: '60050' abstract: - lang: eng text: Reputation systems to rate companies’ performances remain largely unexplored inresearch and are scarcely used in business-to-business (B2B) practice. Such systemsare essential for businesses seeking trustworthy partners, as they help reduce infor-mation asymmetry, lower buyers’ transaction risks, and allow high-quality serviceproviders to justify premium pricing. Unlike traditional review-based systems in thebusiness-to-consumer (B2C) context, we propose a B2B reputation mechanism inwhich buyers commit to a rating payment before a transaction. Once the buyer final-izes the rating, this payment is executed and recorded on a blockchain as an immu-table, secure ledger. Our system mimics natural trust-building mechanisms with rat-ings that are (1) monetary-based, (2) stake-based, (3) non-aggregated, (4) involvecounter-ratings, (5) selectively sellable, (6) individually comparable, (7) stored ona blockchain, (8) and monitored by a third instance. This system provides a novelapproach to fostering trust in B2B transactions by reducing information asymme-try and transaction risk. We illustrate the mechanism’s application in the consultingsector. Our analysis has identified 23 institutional trust and distrust dimensions thatpromote establishing institutional trust through the proposed mechanism. Qualita-tive interviews suggest that, while complex and challenging to apply, this mecha-nism can foster trust in B2B transactions. Given the low maturity in the applicationdomain—rating professional business services with business reputation systems—and solution domain—using monetary stakes for ratings, this system stands as apotential invention. article_type: original author: - first_name: Simon full_name: Hemmrich, Simon id: '83557' last_name: Hemmrich - first_name: Volker full_name: Nissen, Volker last_name: Nissen - first_name: Daniel full_name: Beverungen, Daniel id: '59677' last_name: Beverungen - first_name: Josias Daniel Miño full_name: Pauls, Josias Daniel Miño last_name: Pauls citation: ama: 'Hemmrich S, Nissen V, Beverungen D, Pauls JDM. Blockchain‑based reputation systemsfor business‑to‑business services: designing a reputation mechanism to reduce information asymmetry in professional consulting. Information Systems and e-Business Management. 2025;23(1). doi:https://doi.org/10.1007/s10257-025-00702-9' apa: 'Hemmrich, S., Nissen, V., Beverungen, D., & Pauls, J. D. M. (2025). Blockchain‑based reputation systemsfor business‑to‑business services: designing a reputation mechanism to reduce information asymmetry in professional consulting. Information Systems and E-Business Management, 23(1). https://doi.org/10.1007/s10257-025-00702-9' bibtex: '@article{Hemmrich_Nissen_Beverungen_Pauls_2025, title={Blockchain‑based reputation systemsfor business‑to‑business services: designing a reputation mechanism to reduce information asymmetry in professional consulting}, volume={23}, DOI={https://doi.org/10.1007/s10257-025-00702-9}, number={1}, journal={Information Systems and e-Business Management}, publisher={Springer}, author={Hemmrich, Simon and Nissen, Volker and Beverungen, Daniel and Pauls, Josias Daniel Miño}, year={2025} }' chicago: 'Hemmrich, Simon, Volker Nissen, Daniel Beverungen, and Josias Daniel Miño Pauls. “Blockchain‑based Reputation Systemsfor Business‑to‑business Services: Designing a Reputation Mechanism to Reduce Information Asymmetry in Professional Consulting.” Information Systems and E-Business Management 23, no. 1 (2025). https://doi.org/10.1007/s10257-025-00702-9.' ieee: 'S. Hemmrich, V. Nissen, D. Beverungen, and J. D. M. Pauls, “Blockchain‑based reputation systemsfor business‑to‑business services: designing a reputation mechanism to reduce information asymmetry in professional consulting,” Information Systems and e-Business Management, vol. 23, no. 1, 2025, doi: https://doi.org/10.1007/s10257-025-00702-9.' mla: 'Hemmrich, Simon, et al. “Blockchain‑based Reputation Systemsfor Business‑to‑business Services: Designing a Reputation Mechanism to Reduce Information Asymmetry in Professional Consulting.” Information Systems and E-Business Management, vol. 23, no. 1, Springer, 2025, doi:https://doi.org/10.1007/s10257-025-00702-9.' short: S. Hemmrich, V. Nissen, D. Beverungen, J.D.M. Pauls, Information Systems and E-Business Management 23 (2025). date_created: 2025-05-28T08:12:28Z date_updated: 2026-04-02T04:32:13Z ddc: - '000' department: - _id: '195' doi: https://doi.org/10.1007/s10257-025-00702-9 external_id: unknown: - https://doi.org/10.1007/s10257-025-00702-9 file: - access_level: closed content_type: application/pdf creator: hemmrich date_created: 2025-05-28T08:05:18Z date_updated: 2025-05-28T08:05:18Z file_id: '60051' file_name: Hemmrich_et_al-2025-Information_Systems_and_e-Business_Management.pdf file_size: 1440251 relation: main_file success: 1 file_date_updated: 2025-05-28T08:05:18Z has_accepted_license: '1' intvolume: ' 23' issue: '1' jel: - D81 - D82 - L86 - L10 - M30 keyword: - Information asymmetry - Trust - Reputation system - Monetary rating - Blockchain - Consulting language: - iso: eng main_file_link: - open_access: '1' url: https://link.springer.com/epdf/10.1007/s10257-025-00702-9?sharing_token=fOiWqZx_ScKFAKjxu5UqWPe4RwlQNchNByi7wbcMAY6mjxpZFPB3OtpVT0rAZf9eEBt3_qXIVcZ67l3R9JVYasmuCsIimzE-xfP0N5Rimun248j0jFOnL1eBu4rypKSDFnbmR3kJ5xx-HLnCXvPvQPwpm09qOkS9GSNsiG-du60%3D oa: '1' publication: Information Systems and e-Business Management publication_status: published publisher: Springer quality_controlled: '1' status: public title: 'Blockchain‑based reputation systemsfor business‑to‑business services: designing a reputation mechanism to reduce information asymmetry in professional consulting' type: journal_article user_id: '83557' volume: 23 year: '2025' ... --- _id: '65309' author: - first_name: Simon full_name: Hemmrich, Simon id: '83557' last_name: Hemmrich citation: ama: 'Hemmrich S. A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets. Universität Paderborn; 2025. doi:https://doi.org/10.17619/UNIPB/1-2414' apa: 'Hemmrich, S. (2025). A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets. Universität Paderborn. https://doi.org/10.17619/UNIPB/1-2414' bibtex: '@book{Hemmrich_2025, place={Paderborn}, title={A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets}, DOI={https://doi.org/10.17619/UNIPB/1-2414}, publisher={Universität Paderborn}, author={Hemmrich, Simon}, year={2025} }' chicago: 'Hemmrich, Simon. A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets. Paderborn: Universität Paderborn, 2025. https://doi.org/10.17619/UNIPB/1-2414.' ieee: 'S. Hemmrich, A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets. Paderborn: Universität Paderborn, 2025.' mla: 'Hemmrich, Simon. A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets. Universität Paderborn, 2025, doi:https://doi.org/10.17619/UNIPB/1-2414.' short: 'S. Hemmrich, A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets, Universität Paderborn, Paderborn, 2025.' date_created: 2026-04-02T03:52:09Z date_updated: 2026-04-02T04:31:57Z department: - _id: '195' doi: https://doi.org/10.17619/UNIPB/1-2414 jel: - D8 keyword: - Reputation Systems - Rating systems - monetary ratings - incentive mechanism - systems theory - Market coordination - advanced review system language: - iso: eng page: '347' place: Paderborn publication_status: published publisher: Universität Paderborn status: public supervisor: - first_name: Daniel full_name: Beverungen, Daniel last_name: Beverungen - first_name: Dennis full_name: Kundisch, Dennis last_name: Kundisch title: 'A Design Theory for Blockchain-Based Reputation Systems : Trust and Coordination in B2B Markets' type: dissertation user_id: '83557' year: '2025' ... --- _id: '53101' abstract: - lang: eng text: In this work, we consider optimal control problems for mechanical systems with fixed initial and free final state and a quadratic Lagrange term. Specifically, the dynamics is described by a second order ODE containing an affine control term. Classically, Pontryagin's maximum principle gives necessary optimality conditions for the optimal control problem. For smooth problems, alternatively, a variational approach based on an augmented objective can be followed. Here, we propose a new Lagrangian approach leading to equivalent necessary optimality conditions in the form of Euler-Lagrange equations. Thus, the differential geometric structure (similar to classical Lagrangian dynamics) can be exploited in the framework of optimal control problems. In particular, the formulation enables the symplectic discretisation of the optimal control problem via variational integrators in a straightforward way. article_type: original author: - first_name: Sigrid full_name: Leyendecker, Sigrid last_name: Leyendecker - first_name: Sofya full_name: Maslovskaya, Sofya id: '87909' last_name: Maslovskaya - first_name: Sina full_name: Ober-Blöbaum, Sina id: '16494' last_name: Ober-Blöbaum - first_name: Rodrigo T. Sato Martín de full_name: Almagro, Rodrigo T. Sato Martín de last_name: Almagro - first_name: Flóra Orsolya full_name: Szemenyei, Flóra Orsolya last_name: Szemenyei citation: ama: Leyendecker S, Maslovskaya S, Ober-Blöbaum S, Almagro RTSM de, Szemenyei FO. A new Lagrangian approach to control affine systems with a quadratic Lagrange term. Journal of Computational Dynamics. 2024;0(0):0-0. doi:10.3934/jcd.2024017 apa: Leyendecker, S., Maslovskaya, S., Ober-Blöbaum, S., Almagro, R. T. S. M. de, & Szemenyei, F. O. (2024). A new Lagrangian approach to control affine systems with a quadratic Lagrange term. Journal of Computational Dynamics, 0(0), 0–0. https://doi.org/10.3934/jcd.2024017 bibtex: '@article{Leyendecker_Maslovskaya_Ober-Blöbaum_Almagro_Szemenyei_2024, title={A new Lagrangian approach to control affine systems with a quadratic Lagrange term}, volume={0}, DOI={10.3934/jcd.2024017}, number={0}, journal={Journal of Computational Dynamics}, publisher={American Institute of Mathematical Sciences (AIMS)}, author={Leyendecker, Sigrid and Maslovskaya, Sofya and Ober-Blöbaum, Sina and Almagro, Rodrigo T. Sato Martín de and Szemenyei, Flóra Orsolya}, year={2024}, pages={0–0} }' chicago: 'Leyendecker, Sigrid, Sofya Maslovskaya, Sina Ober-Blöbaum, Rodrigo T. Sato Martín de Almagro, and Flóra Orsolya Szemenyei. “A New Lagrangian Approach to Control Affine Systems with a Quadratic Lagrange Term.” Journal of Computational Dynamics 0, no. 0 (2024): 0–0. https://doi.org/10.3934/jcd.2024017.' ieee: 'S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, R. T. S. M. de Almagro, and F. O. Szemenyei, “A new Lagrangian approach to control affine systems with a quadratic Lagrange term,” Journal of Computational Dynamics, vol. 0, no. 0, pp. 0–0, 2024, doi: 10.3934/jcd.2024017.' mla: Leyendecker, Sigrid, et al. “A New Lagrangian Approach to Control Affine Systems with a Quadratic Lagrange Term.” Journal of Computational Dynamics, vol. 0, no. 0, American Institute of Mathematical Sciences (AIMS), 2024, pp. 0–0, doi:10.3934/jcd.2024017. short: S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, R.T.S.M. de Almagro, F.O. Szemenyei, Journal of Computational Dynamics 0 (2024) 0–0. date_created: 2024-03-28T15:58:02Z date_updated: 2024-03-28T16:07:34Z ddc: - '510' department: - _id: '636' doi: 10.3934/jcd.2024017 has_accepted_license: '1' issue: '0' keyword: - Optimal control problem - Lagrangian system - Hamiltonian system - Variations - Pontryagin's maximum principle. language: - iso: eng main_file_link: - open_access: '1' url: https://www.aimsciences.org/article/doi/10.3934/jcd.2024017 oa: '1' page: 0-0 publication: Journal of Computational Dynamics publication_identifier: issn: - 2158-2491 - 2158-2505 publication_status: published publisher: American Institute of Mathematical Sciences (AIMS) status: public title: A new Lagrangian approach to control affine systems with a quadratic Lagrange term type: journal_article user_id: '87909' volume: '0' year: '2024' ... --- _id: '55159' abstract: - lang: eng text: "We introduce a method based on Gaussian process regression to identify discrete variational principles from observed solutions of a field theory. The method is based on the data-based identification of a discrete Lagrangian density. It is a geometric machine learning technique in the sense that the variational structure of the true field theory is reflected in the data-driven model by design. We provide a rigorous convergence statement of the method. The proof circumvents challenges posed by the ambiguity of discrete Lagrangian densities in the inverse problem of variational calculus.\r\nMoreover, our method can be used to quantify model uncertainty in the equations of motions and any linear observable of the discrete field theory. This is illustrated on the example of the discrete wave equation and Schrödinger equation.\r\nThe article constitutes an extension of our previous article arXiv:2404.19626 for the data-driven identification of (discrete) Lagrangians for variational dynamics from an ode setting to the setting of discrete pdes." author: - first_name: Christian full_name: Offen, Christian id: '85279' last_name: Offen orcid: 0000-0002-5940-8057 citation: ama: Offen C. Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification. apa: Offen, C. (n.d.). Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification. bibtex: '@article{Offen, title={Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification}, author={Offen, Christian} }' chicago: Offen, Christian. “Machine Learning of Discrete Field Theories with Guaranteed Convergence and Uncertainty Quantification,” n.d. ieee: C. Offen, “Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification.” . mla: Offen, Christian. Machine Learning of Discrete Field Theories with Guaranteed Convergence and Uncertainty Quantification. short: C. Offen, (n.d.). date_created: 2024-07-10T13:43:50Z date_updated: 2024-08-12T13:43:32Z ddc: - '510' department: - _id: '636' external_id: arxiv: - '2407.07642' file: - access_level: open_access content_type: application/pdf creator: coffen date_created: 2024-07-10T13:39:32Z date_updated: 2024-07-10T13:39:32Z description: |- We introduce a method based on Gaussian process regression to identify discrete variational principles from observed solutions of a field theory. The method is based on the data-based identification of a discrete Lagrangian density. It is a geometric machine learning technique in the sense that the variational structure of the true field theory is reflected in the data-driven model by design. We provide a rigorous convergence statement of the method. The proof circumvents challenges posed by the ambiguity of discrete Lagrangian densities in the inverse problem of variational calculus. Moreover, our method can be used to quantify model uncertainty in the equations of motions and any linear observable of the discrete field theory. This is illustrated on the example of the discrete wave equation and Schrödinger equation. The article constitutes an extension of our previous article for the data-driven identification of (discrete) Lagrangians for variational dynamics from an ode setting to the setting of discrete pdes. file_id: '55160' file_name: L_Collocation.pdf file_size: 4569314 relation: main_file title: Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification file_date_updated: 2024-07-10T13:39:32Z has_accepted_license: '1' keyword: - System identification - inverse problem of variational calculus - Gaussian process - Lagrangian learning - physics informed machine learning - geometry aware learning language: - iso: eng oa: '1' page: '28' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication_status: submitted related_material: link: - description: GitHub relation: software url: https://github.com/Christian-Offen/Lagrangian_GP_PDE status: public title: Machine learning of discrete field theories with guaranteed convergence and uncertainty quantification type: preprint user_id: '85279' year: '2024' ... --- _id: '54552' abstract: - lang: ger text: Die vorliegende Dissertation beschreibt das Konzept und den Entwicklungsprozess eines Lichtsignalanlagenregelungssystems bis zur Realumsetzung. Das Regelungssystem, welches im Rahmen des Pilotprojekts Schlosskreuzung entstanden ist, besteht dabei aus zwei untereinander abgestimmten Methoden zur Echtzeit-Verkehrsrekonstruktion und zur modellprädiktiven Regelung des Verkehrssystems anhand der vorhandenen Lichtsignalanlagen. Die Echtzeit-Verkehrsrekonstruktion approximiert dabei simulationsbasiert den aktuellen Verkehrszustand anhand gegebener Messdaten über dynamische Verkehrszuweisungen. Die entwickelte mehrstufige Lichtsignalanlagenregelung nutzt ein Fuzzy-System zur Phasenvorauswahl, um anschließend über eine modellprädiktive Regelung das nichtlineare Problem mit dem Ergebnis der optimalen Kombinationen von Phasen und Schaltzeitpunkten zu lösen. Das Regelungssystem wird in dieser Arbeit anhand eines ausgewählten Verkehrsgebiets zunächst rein simulativ getestet und mit dem vorliegenden Bestandsverfahren verglichen. Im Anschluss an die prototypische Inbetriebnahme wird dieser Vergleich durch die Feldtests abgeschlossen. Entsprechende Ergebnisse zeigen das große Potential der Entwicklung hinsichtlich der Reduktion von Kriterien wie Emissionen oder Wartezeiten und gleichzeitig den Handlungsbedarf für eine standardmäßige Nutzung. - lang: eng text: This dissertation describes the concept and the development process of a traffic signal control system up to the real implementation.The control system, which was developed in the context of the Pilotprojekt Schlosskreuzung, consists of two mutually coordinated methods for real-time traffic reconstruction and for model-predictive control of the traffic system based on the existing traffic light systems.The real-time traffic reconstruction approximates the current traffic state simulation-based using given measurement data via dynamic traffic assignments.The designed multi-stage traffic signal control system uses a fuzzy-system for phase preselection and subsequently employs model predictive control to solve the nonlinear problem resulting in the optimal combinations of phases and switching times.In this work, the control system is first tested purely simulatively on the basis of a selected traffic area and compared with the existing inventory method.Following the prototypical commissioning, this comparison is finalised by field tests.Corresponding results show the great potential of the development with regard to the reduction of criteria such as emissions or waiting times and at the same time the need for action for use as standard. author: - first_name: Kevin full_name: Malena, Kevin id: '36303' last_name: Malena orcid: 0000-0003-1183-4679 citation: ama: Malena K. Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems. Vol 422. Heinz Nixdorf Institut, Universität Paderborn; 2024. doi:10.17619/UNIPB/1-2021 apa: Malena, K. (2024). Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems (Vol. 422). Heinz Nixdorf Institut, Universität Paderborn. https://doi.org/10.17619/UNIPB/1-2021 bibtex: '@book{Malena_2024, series={Verlagsschriftenreihe des Heinz Nixdorf Instituts}, title={Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems}, volume={422}, DOI={10.17619/UNIPB/1-2021}, publisher={Heinz Nixdorf Institut, Universität Paderborn}, author={Malena, Kevin}, year={2024}, collection={Verlagsschriftenreihe des Heinz Nixdorf Instituts} }' chicago: Malena, Kevin. Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems. Vol. 422. Verlagsschriftenreihe des Heinz Nixdorf Instituts. Heinz Nixdorf Institut, Universität Paderborn, 2024. https://doi.org/10.17619/UNIPB/1-2021. ieee: K. Malena, Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems, vol. 422. Heinz Nixdorf Institut, Universität Paderborn, 2024. mla: Malena, Kevin. Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems. Heinz Nixdorf Institut, Universität Paderborn, 2024, doi:10.17619/UNIPB/1-2021. short: K. Malena, Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems, Heinz Nixdorf Institut, Universität Paderborn, 2024. date_created: 2024-06-03T10:42:56Z date_updated: 2024-10-30T14:41:24Z ddc: - '620' department: - _id: '153' doi: 10.17619/UNIPB/1-2021 file: - access_level: closed content_type: application/pdf creator: kmalena date_created: 2024-10-30T13:57:54Z date_updated: 2024-10-30T13:57:54Z file_id: '56828' file_name: Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems-1.pdf file_size: 14902500 relation: main_file success: 1 file_date_updated: 2024-10-30T13:57:54Z has_accepted_license: '1' intvolume: ' 422' keyword: - Traffic Light System Control - Model Predictive Control language: - iso: ger page: '207' publication_identifier: isbn: - 978-3-947647-41-5 publication_status: published publisher: Heinz Nixdorf Institut, Universität Paderborn series_title: Verlagsschriftenreihe des Heinz Nixdorf Instituts status: public supervisor: - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Jürgen full_name: Krimmling, Jürgen last_name: Krimmling title: Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems type: dissertation user_id: '36303' volume: 422 year: '2024' ... --- _id: '57300' abstract: - lang: eng text: Engineering methodologies for Cyber-Physical Systems (CPS) call for planning simulations and physical testing in early phases of product creation. Even in Model-Based Systems Engineering, there is a lack of systematic support that results in avoidable costs and iterations in the engineering process. Planning test cases and test scenarios along the product engineering process is not sufficiently integrated in terms of support especially for verification and validation engineers. Based on a systematic literature review, concepts for model-based planning of testing are developed. Characteristics of test cases and test scenarios of CPS are systematically identified. Generic templates for the creation of test cases and scenarios are derived. Based on the templates, a System Modeling Language (SysML) profile extension is developed which enables intuitive modelling of test cases and scenarios. The SysML profile is evaluated in a sample System-of-Systems in Disaster Response. It subsumes various types of sensor systems like rescue robotics, data science algorithms and visualization technologies like Augmented Reality to support decisions in extreme weather events. The templates and SysML profile significantly add value for engineers in the early and systematic planning of verification and validation. author: - first_name: Iris full_name: Gräßler, Iris id: '47565' last_name: Gräßler orcid: 0000-0001-5765-971X - first_name: Marcel full_name: Ebel, Marcel id: '81788' last_name: Ebel orcid: https://orcid.org/0009-0007-5400-4436 - first_name: Jens full_name: Pottebaum, Jens id: '405' last_name: Pottebaum orcid: http://orcid.org/0000-0001-8778-2989 citation: ama: 'Gräßler I, Ebel M, Pottebaum J. Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems. In: 2024 IEEE International Symposium on Systems Engineering (ISSE). IEEE; 2024. doi:10.1109/isse63315.2024.10741135' apa: Gräßler, I., Ebel, M., & Pottebaum, J. (2024). Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems. 2024 IEEE International Symposium on Systems Engineering (ISSE). IEEE International Symposium on Systems Engineering 2024, Perugia. https://doi.org/10.1109/isse63315.2024.10741135 bibtex: '@inproceedings{Gräßler_Ebel_Pottebaum_2024, title={Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems}, DOI={10.1109/isse63315.2024.10741135}, booktitle={2024 IEEE International Symposium on Systems Engineering (ISSE)}, publisher={IEEE}, author={Gräßler, Iris and Ebel, Marcel and Pottebaum, Jens}, year={2024} }' chicago: Gräßler, Iris, Marcel Ebel, and Jens Pottebaum. “Model-Based Planning of Test Cases and Test Scenarios to Support Engineering of Cyber-Physical Systems.” In 2024 IEEE International Symposium on Systems Engineering (ISSE). IEEE, 2024. https://doi.org/10.1109/isse63315.2024.10741135. ieee: 'I. Gräßler, M. Ebel, and J. Pottebaum, “Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems,” presented at the IEEE International Symposium on Systems Engineering 2024, Perugia, 2024, doi: 10.1109/isse63315.2024.10741135.' mla: Gräßler, Iris, et al. “Model-Based Planning of Test Cases and Test Scenarios to Support Engineering of Cyber-Physical Systems.” 2024 IEEE International Symposium on Systems Engineering (ISSE), IEEE, 2024, doi:10.1109/isse63315.2024.10741135. short: 'I. Gräßler, M. Ebel, J. Pottebaum, in: 2024 IEEE International Symposium on Systems Engineering (ISSE), IEEE, 2024.' conference: end_date: 2024-10-18 location: Perugia name: ' IEEE International Symposium on Systems Engineering 2024' start_date: 2024-10-16 date_created: 2024-11-20T20:06:22Z date_updated: 2025-01-17T16:20:14Z department: - _id: '152' doi: 10.1109/isse63315.2024.10741135 has_accepted_license: '1' keyword: - Systems Engineering - Systems verification - System testing language: - iso: eng main_file_link: - open_access: '1' url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10741135&tag=1 oa: '1' project: - _id: '516' grant_number: '101092749' name: 'CREXDATA: CREXDATA: Kritische Maßnahmenplanung über extreme Datenmengen' publication: 2024 IEEE International Symposium on Systems Engineering (ISSE) publication_status: published publisher: IEEE quality_controlled: '1' status: public title: Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems type: conference user_id: '405' year: '2024' ... --- _id: '56636' abstract: - lang: eng text: Abstract. Business reputation ecosystems are a widely untapped research field. In these ecosystems, agents can selectively exchange (monetary) ratings to in-form about the experienced quality in a market. We build a model for conducting a multi-agent simulation that can be used to simulate and evaluate business rep-utation ecosystems as a new system class. We explore the factual occurring vol-untary payment to create positive (pay) or negative ratings (no pay), selling rat-ings selectively to alleviate information asymmetry, and the workings of counter-ratings to prevent buyers' dishonest ratings. Thereby, we analyze, among others, agent profitability, the occurrence of dishonest ratings, and reputation bias and sensitivity. The results provide simulation-based empirical evidence that the con-cept of monetary reputation systems provides necessary incentives for participa-tion, and high-quality sellers and honest buyers benefit from such a system. The results indicate that counter-ratings prompt buyers author: - first_name: Ulvi full_name: Ibrahimli, Ulvi last_name: Ibrahimli - first_name: Simon full_name: Hemmrich, Simon last_name: Hemmrich - first_name: Simon full_name: Zauke, Simon last_name: Zauke - first_name: Axel full_name: Winkelmann, Axel last_name: Winkelmann citation: ama: 'Ibrahimli U, Hemmrich S, Zauke S, Winkelmann A. Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-agent Simulation on Monetary  Ratings. In: 19. Internationale Tagung Wirtschaftsinformatik (WI24). ; 2024.' apa: Ibrahimli, U., Hemmrich, S., Zauke, S., & Winkelmann, A. (2024). Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-agent Simulation on Monetary  Ratings. 19. Internationale Tagung Wirtschaftsinformatik (WI24). bibtex: '@inproceedings{Ibrahimli_Hemmrich_Zauke_Winkelmann_2024, title={Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-agent Simulation on Monetary  Ratings}, booktitle={19. Internationale Tagung Wirtschaftsinformatik (WI24)}, author={Ibrahimli, Ulvi and Hemmrich, Simon and Zauke, Simon and Winkelmann, Axel}, year={2024} }' chicago: Ibrahimli, Ulvi, Simon Hemmrich, Simon Zauke, and Axel Winkelmann. “Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-Agent Simulation on Monetary  Ratings.” In 19. Internationale Tagung Wirtschaftsinformatik (WI24), 2024. ieee: U. Ibrahimli, S. Hemmrich, S. Zauke, and A. Winkelmann, “Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-agent Simulation on Monetary  Ratings,” Würzburg, 2024. mla: Ibrahimli, Ulvi, et al. “Overcoming Lemon Markets with Business Reputation  Ecosystem – A Multi-Agent Simulation on Monetary  Ratings.” 19. Internationale Tagung Wirtschaftsinformatik (WI24), 2024. short: 'U. Ibrahimli, S. Hemmrich, S. Zauke, A. Winkelmann, in: 19. Internationale Tagung Wirtschaftsinformatik (WI24), 2024.' conference: location: Würzburg date_created: 2024-10-16T07:36:56Z date_updated: 2026-04-02T04:31:53Z jel: - C30 - A12 - D4 - D82 - L14 keyword: - Reputation System - Payment as Rating - Multi-Agent Simulation - Lemon Markets language: - iso: eng main_file_link: - open_access: '1' url: https://www.researchgate.net/publication/382338551_Overcoming_Lemon_Markets_with_Business_Reputation_Ecosystem_-A_Multi-agent_Simulation_on_Monetary_Ratings_Research_Paper oa: '1' publication: 19. Internationale Tagung Wirtschaftsinformatik (WI24) publication_status: published quality_controlled: '1' status: public title: Overcoming Lemon Markets with Business Reputation Ecosystem – A Multi-agent Simulation on Monetary Ratings type: conference user_id: '83557' year: '2024' ... --- _id: '35657' abstract: - lang: eng text: The controlled delivery of active pharmaceutical ingredients to the site of disease represents a major challenge in drug therapy. Particularly when drugs have to be transported across biological barriers, suitable drug delivery systems are of importance. In recent years responsive delivery systems have been developed which enable a controlled drug release depending on internal or external stimuli such as changes in pH, redox environment or light and temperature. In some studies delivery systems with reactivity against two different stimuli were established either to enhance the response by synergies of the stimuli or to broaden the window of possible trigger events. In the present review numerous exciting developments of pH-, light- and redox-cleavable polymers suitable for the preparation of smart delivery systems are described. The review discusses the different stimuli that can be used for a controlled drug release of polymer-based delivery systems. It puts a focus on the different polymers described for the preparation of stimuli-sensitive systems, their preparation techniques as well as their stimuli-responsive degradation. © 2022 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry. article_type: original author: - first_name: Tarik full_name: Rust, Tarik last_name: Rust - first_name: Dimitri full_name: Jung, Dimitri last_name: Jung - first_name: Klaus full_name: Langer, Klaus last_name: Langer - first_name: Dirk full_name: Kuckling, Dirk id: '287' last_name: Kuckling citation: ama: Rust T, Jung D, Langer K, Kuckling D. Stimuli‐accelerated polymeric drug delivery systems. Polymer International. 2023;72(1):5-19. doi:10.1002/pi.6474 apa: Rust, T., Jung, D., Langer, K., & Kuckling, D. (2023). Stimuli‐accelerated polymeric drug delivery systems. Polymer International, 72(1), 5–19. https://doi.org/10.1002/pi.6474 bibtex: '@article{Rust_Jung_Langer_Kuckling_2023, title={Stimuli‐accelerated polymeric drug delivery systems}, volume={72}, DOI={10.1002/pi.6474}, number={1}, journal={Polymer International}, publisher={Wiley}, author={Rust, Tarik and Jung, Dimitri and Langer, Klaus and Kuckling, Dirk}, year={2023}, pages={5–19} }' chicago: 'Rust, Tarik, Dimitri Jung, Klaus Langer, and Dirk Kuckling. “Stimuli‐accelerated Polymeric Drug Delivery Systems.” Polymer International 72, no. 1 (2023): 5–19. https://doi.org/10.1002/pi.6474.' ieee: 'T. Rust, D. Jung, K. Langer, and D. Kuckling, “Stimuli‐accelerated polymeric drug delivery systems,” Polymer International, vol. 72, no. 1, pp. 5–19, 2023, doi: 10.1002/pi.6474.' mla: Rust, Tarik, et al. “Stimuli‐accelerated Polymeric Drug Delivery Systems.” Polymer International, vol. 72, no. 1, Wiley, 2023, pp. 5–19, doi:10.1002/pi.6474. short: T. Rust, D. Jung, K. Langer, D. Kuckling, Polymer International 72 (2023) 5–19. date_created: 2023-01-10T08:25:22Z date_updated: 2023-01-10T08:31:31Z department: - _id: '163' doi: 10.1002/pi.6474 intvolume: ' 72' issue: '1' keyword: - drug delivery system - stimuli - polymer - cleavable language: - iso: eng main_file_link: - url: https://onlinelibrary.wiley.com/doi/10.1002/pi.6474 page: 5-19 publication: Polymer International publication_identifier: issn: - 0959-8103 - 1097-0126 publication_status: published publisher: Wiley status: public title: Stimuli‐accelerated polymeric drug delivery systems type: journal_article user_id: '94' volume: 72 year: '2023' ... --- _id: '49785' abstract: - lang: eng text: "Reputation is indispensable for online business since it supports customers in their buying decisions and\r\nallows sellers to justify premium prices. While IS research has investigated reputation systems mainly\r\nas review systems on online platforms for business-to-consumer (B2C) transactions, no proper solutions\r\nhave been developed for business-to-business (B2B) transactions yet. We use blockchain technology to\r\npropose a new class of reputation systems that apply ratings as voluntary bonus payments: Before a\r\ntransaction is performed, customers commit to pay a bonus that is granted if a service provider has\r\nperformed a service properly. As opposed to rival reputation systems that build on cumulated ratings\r\nor reviews, our system enables monetized reputation mechanisms that are inextricably linked with online\r\ntransactions. We expect this system class to provide more trustworthy ratings, which might reduce\r\nagency costs and serve quality providers to establish a reputation towards new customers, building on\r\nsecond-order trust." author: - first_name: Simon full_name: Hemmrich, Simon id: '83557' last_name: Hemmrich citation: ama: 'Hemmrich S. Business Reputation Systems based on Blockchain Technology—A Risky Advance. In: Proceedings of 31st European Conference on Information Systems (ECIS 2023). ; 2023.' apa: Hemmrich, S. (2023). Business Reputation Systems based on Blockchain Technology—A Risky Advance. Proceedings of 31st European Conference on Information Systems (ECIS 2023). bibtex: '@inproceedings{Hemmrich_2023, title={Business Reputation Systems based on Blockchain Technology—A Risky Advance}, booktitle={Proceedings of 31st European Conference on Information Systems (ECIS 2023)}, author={Hemmrich, Simon}, year={2023} }' chicago: Hemmrich, Simon. “Business Reputation Systems Based on Blockchain Technology—A Risky Advance.” In Proceedings of 31st European Conference on Information Systems (ECIS 2023), 2023. ieee: S. Hemmrich, “Business Reputation Systems based on Blockchain Technology—A Risky Advance,” Kristiansand, 2023. mla: Hemmrich, Simon. “Business Reputation Systems Based on Blockchain Technology—A Risky Advance.” Proceedings of 31st European Conference on Information Systems (ECIS 2023), 2023. short: 'S. Hemmrich, in: Proceedings of 31st European Conference on Information Systems (ECIS 2023), 2023.' conference: location: Kristiansand date_created: 2023-12-18T12:55:32Z date_updated: 2024-04-15T13:33:21Z jel: - D47 - D82 - D81 - E42 keyword: - Trust - Risk - Reputation System - Blockchain Technology - Business Reputation System. language: - iso: eng main_file_link: - open_access: '1' url: https://aisel.aisnet.org/ecis2023_rip/51/ oa: '1' publication: Proceedings of 31st European Conference on Information Systems (ECIS 2023) publication_status: published quality_controlled: '1' status: public title: Business Reputation Systems based on Blockchain Technology—A Risky Advance type: conference user_id: '83557' year: '2023' ... --- _id: '42163' abstract: - lang: eng text: 'The article shows how to learn models of dynamical systems from data which are governed by an unknown variational PDE. Rather than employing reduction techniques, we learn a discrete field theory governed by a discrete Lagrangian density $L_d$ that is modelled as a neural network. Careful regularisation of the loss function for training $L_d$ is necessary to obtain a field theory that is suitable for numerical computations: we derive a regularisation term which optimises the solvability of the discrete Euler--Lagrange equations. Secondly, we develop a method to find solutions to machine learned discrete field theories which constitute travelling waves of the underlying continuous PDE.' author: - first_name: Christian full_name: Offen, Christian id: '85279' last_name: Offen orcid: 0000-0002-5940-8057 - first_name: Sina full_name: Ober-Blöbaum, Sina id: '16494' last_name: Ober-Blöbaum citation: ama: 'Offen C, Ober-Blöbaum S. Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves. In: Nielsen F, Barbaresco F, eds. Geometric Science of Information. Vol 14071. Lecture Notes in Computer Science (LNCS). Springer, Cham.; 2023:569-579. doi:10.1007/978-3-031-38271-0_57' apa: Offen, C., & Ober-Blöbaum, S. (2023). Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves. In F. Nielsen & F. Barbaresco (Eds.), Geometric Science of Information (Vol. 14071, pp. 569–579). Springer, Cham. https://doi.org/10.1007/978-3-031-38271-0_57 bibtex: '@inproceedings{Offen_Ober-Blöbaum_2023, series={Lecture Notes in Computer Science (LNCS)}, title={Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves}, volume={14071}, DOI={10.1007/978-3-031-38271-0_57}, booktitle={Geometric Science of Information}, publisher={Springer, Cham.}, author={Offen, Christian and Ober-Blöbaum, Sina}, editor={Nielsen, F and Barbaresco, F}, year={2023}, pages={569–579}, collection={Lecture Notes in Computer Science (LNCS)} }' chicago: Offen, Christian, and Sina Ober-Blöbaum. “Learning Discrete Lagrangians for Variational PDEs from Data and Detection of Travelling Waves.” In Geometric Science of Information, edited by F Nielsen and F Barbaresco, 14071:569–79. Lecture Notes in Computer Science (LNCS). Springer, Cham., 2023. https://doi.org/10.1007/978-3-031-38271-0_57. ieee: 'C. Offen and S. Ober-Blöbaum, “Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves,” in Geometric Science of Information, Saint-Malo, Palais du Grand Large, France, 2023, vol. 14071, pp. 569–579, doi: 10.1007/978-3-031-38271-0_57.' mla: Offen, Christian, and Sina Ober-Blöbaum. “Learning Discrete Lagrangians for Variational PDEs from Data and Detection of Travelling Waves.” Geometric Science of Information, edited by F Nielsen and F Barbaresco, vol. 14071, Springer, Cham., 2023, pp. 569–79, doi:10.1007/978-3-031-38271-0_57. short: 'C. Offen, S. Ober-Blöbaum, in: F. Nielsen, F. Barbaresco (Eds.), Geometric Science of Information, Springer, Cham., 2023, pp. 569–579.' conference: end_date: 2023-09-01 location: Saint-Malo, Palais du Grand Large, France name: ' GSI''23 6th International Conference on Geometric Science of Information' start_date: 2023-08-30 date_created: 2023-02-16T11:32:48Z date_updated: 2024-08-12T13:46:29Z ddc: - '510' department: - _id: '636' doi: 10.1007/978-3-031-38271-0_57 editor: - first_name: F full_name: Nielsen, F last_name: Nielsen - first_name: F full_name: Barbaresco, F last_name: Barbaresco external_id: arxiv: - '2302.08232 ' file: - access_level: open_access content_type: application/pdf creator: coffen date_created: 2023-08-02T12:04:17Z date_updated: 2023-08-02T12:04:17Z description: |- The article shows how to learn models of dynamical systems from data which are governed by an unknown variational PDE. Rather than employing reduction techniques, we learn a discrete field theory governed by a discrete Lagrangian density Ld that is modelled as a neural network. Careful regularisation of the loss function for training Ld is necessary to obtain a field theory that is suitable for numerical computations: we derive a regularisation term which optimises the solvability of the discrete Euler–Lagrange equations. Secondly, we develop a method to find solutions to machine learned discrete field theories which constitute travelling waves of the underlying continuous PDE. file_id: '46273' file_name: LDensityLearning.pdf file_size: 1938962 relation: main_file title: Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves file_date_updated: 2023-08-02T12:04:17Z has_accepted_license: '1' intvolume: ' 14071' keyword: - System identification - discrete Lagrangians - travelling waves language: - iso: eng oa: '1' page: 569-579 project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Geometric Science of Information publication_identifier: eisbn: - 978-3-031-38271-0 publication_status: published publisher: Springer, Cham. quality_controlled: '1' related_material: link: - description: GitHub relation: software url: https://github.com/Christian-Offen/LagrangianDensityML series_title: Lecture Notes in Computer Science (LNCS) status: public title: Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves type: conference user_id: '85279' volume: 14071 year: '2023' ... --- _id: '43464' abstract: - lang: eng text: Lightweight design is a common approach to reduce energy demand in the use stage of vehicles. The production of lightweight materials is usually associated with an increase in energy demand, so the environmental impacts of lightweight structures need to be assessed holistically using a life cycle assessment. To estimate the life cycle environmental impacts of a product in its developmental stage, for example, by life cycle engineering, future changes in relevant influencing factors must be considered. Prospective life cycle assessment provides methods for integrating future scenarios into life cycle assessment studies. However, approaches for integrating prospective life cycle assessment into product development are limited. The objective of this work is to provide the methodological foundation for integrating future scenarios of relevant influencing factors in the development of lightweight structures. The applicability of the novel methodology is demonstrated by a case study of a structural component in a steel, aluminium, and hybrid design. The results show that appropriate decarbonisation measures can reduce the life cycle greenhouse gas emissions by up to 95 percent until 2050. We also found that shifts in the environmentally optimal design are possible in future scenarios. Therefore, the methodology and data provided contribute to improved decision-making in product development. article_number: '3371' author: - first_name: Moritz full_name: Ostermann, Moritz id: '44763' last_name: Ostermann orcid: https://orcid.org/0000-0003-1146-0443 - first_name: Julian full_name: Grenz, Julian last_name: Grenz - first_name: Marcel full_name: Triebus, Marcel id: '66036' last_name: Triebus - first_name: Felipe full_name: Cerdas, Felipe last_name: Cerdas - first_name: Thorsten full_name: Marten, Thorsten id: '338' last_name: Marten - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster - first_name: Christoph full_name: Herrmann, Christoph last_name: Herrmann citation: ama: 'Ostermann M, Grenz J, Triebus M, et al. Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures. Energies. 2023;16(8). doi:10.3390/en16083371' apa: 'Ostermann, M., Grenz, J., Triebus, M., Cerdas, F., Marten, T., Tröster, T., & Herrmann, C. (2023). Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures. Energies, 16(8), Article 3371. https://doi.org/10.3390/en16083371' bibtex: '@article{Ostermann_Grenz_Triebus_Cerdas_Marten_Tröster_Herrmann_2023, title={Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures}, volume={16}, DOI={10.3390/en16083371}, number={83371}, journal={Energies}, publisher={MDPI AG}, author={Ostermann, Moritz and Grenz, Julian and Triebus, Marcel and Cerdas, Felipe and Marten, Thorsten and Tröster, Thomas and Herrmann, Christoph}, year={2023} }' chicago: 'Ostermann, Moritz, Julian Grenz, Marcel Triebus, Felipe Cerdas, Thorsten Marten, Thomas Tröster, and Christoph Herrmann. “Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures.” Energies 16, no. 8 (2023). https://doi.org/10.3390/en16083371.' ieee: 'M. Ostermann et al., “Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures,” Energies, vol. 16, no. 8, Art. no. 3371, 2023, doi: 10.3390/en16083371.' mla: 'Ostermann, Moritz, et al. “Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures.” Energies, vol. 16, no. 8, 3371, MDPI AG, 2023, doi:10.3390/en16083371.' short: M. Ostermann, J. Grenz, M. Triebus, F. Cerdas, T. Marten, T. Tröster, C. Herrmann, Energies 16 (2023). date_created: 2023-04-13T09:11:33Z date_updated: 2023-04-13T09:19:56Z department: - _id: '9' - _id: '321' - _id: '149' doi: 10.3390/en16083371 intvolume: ' 16' issue: '8' keyword: - Life Cycle Engineering - Life Cycle Assessment - Lightweight Design - Prospective LCA - Future-oriented LCA - Energy System - Material production - Sustainable production language: - iso: eng main_file_link: - open_access: '1' url: https://www.mdpi.com/1996-1073/16/8/3371 oa: '1' publication: Energies publication_identifier: issn: - 1996-1073 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: 'Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures' type: journal_article user_id: '44763' volume: 16 year: '2023' ... --- _id: '46765' abstract: - lang: ger text: Über zwei Drittel der Anfänger*innen im Übergangssystem verfügen maximal über einen Hauptschul-/Mittelschulabschluss. Sie sind damit überrepräsentiert, was sich weniger durch ihre Kompetenzen als mit ihrem sozioökonomischen Status und klassenspezifischen Nachqualifizierungsverhalten erklären lässt. article_type: original author: - first_name: Christian full_name: Sommer, Christian id: '33108' last_name: Sommer citation: ama: Sommer C. Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems. Berufsbildung Zeitschrift für Theorie-Praxis-Dialog. 2023;199:9-13. doi:10.3278/BB2303W apa: Sommer, C. (2023). Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems. Berufsbildung. Zeitschrift Für Theorie-Praxis-Dialog, 199, 9–13. https://doi.org/10.3278/BB2303W bibtex: '@article{Sommer_2023, title={Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems}, volume={199}, DOI={10.3278/BB2303W}, journal={Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog}, publisher={wbv}, author={Sommer, Christian}, year={2023}, pages={9–13} }' chicago: 'Sommer, Christian. “Der Hauptschulabschluss Als Sozial Selektiver Hauptzulieferer Des Übergangssystems.” Berufsbildung. Zeitschrift Für Theorie-Praxis-Dialog 199 (2023): 9–13. https://doi.org/10.3278/BB2303W.' ieee: 'C. Sommer, “Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems,” Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog, vol. 199, pp. 9–13, 2023, doi: 10.3278/BB2303W.' mla: Sommer, Christian. “Der Hauptschulabschluss Als Sozial Selektiver Hauptzulieferer Des Übergangssystems.” Berufsbildung. Zeitschrift Für Theorie-Praxis-Dialog, vol. 199, wbv, 2023, pp. 9–13, doi:10.3278/BB2303W. short: C. Sommer, Berufsbildung. Zeitschrift Für Theorie-Praxis-Dialog 199 (2023) 9–13. date_created: 2023-09-02T18:39:47Z date_updated: 2025-05-16T10:32:21Z department: - _id: '397' doi: 10.3278/BB2303W intvolume: ' 199' keyword: - Social inequality - Transition system language: - iso: eng page: 9-13 publication: Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog publication_identifier: issn: - '00059536' publisher: wbv quality_controlled: '1' status: public title: Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems type: journal_article user_id: '33108' volume: 199 year: '2023' ... --- _id: '34140' abstract: - lang: eng text: In this paper, machine learning techniques will be used to classify different PCB layouts given their electromagnetic frequency spectra. These spectra result from a simulated near-field measurement of electric field strengths at different locations. Measured values consist of real and imaginary parts (amplitude and phase) in X, Y and Z directions. Training data was obtained in the time domain by varying transmission line geometries (size, distance and signaling). It was then transformed into the frequency domain and used as deep neural network input. Principal component analysis was applied to reduce the sample dimension. The results show that classifying different designs is possible with high accuracy based on synthetic data. Future work comprises measurements of real, custom-made PCB with varying parameters to adapt the simulation model and also test the neural network. Finally, the trained model could be used to give hints about the error’s cause when overshooting EMC limits. author: - first_name: Jad full_name: Maalouly, Jad last_name: Maalouly - first_name: Dennis full_name: Hemker, Dennis last_name: Hemker - first_name: Christian full_name: Hedayat, Christian last_name: Hedayat - first_name: Christian full_name: Rückert, Christian last_name: Rückert - first_name: Ivan full_name: Kaufmann, Ivan last_name: Kaufmann - first_name: Marcel full_name: Olbrich, Marcel last_name: Olbrich - first_name: Sven full_name: Lange, Sven id: '38240' last_name: Lange - first_name: Harald full_name: Mathis, Harald last_name: Mathis citation: ama: 'Maalouly J, Hemker D, Hedayat C, et al. AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development. In: 2022 Kleinheubach Conference. IEEE; 2022.' apa: Maalouly, J., Hemker, D., Hedayat, C., Rückert, C., Kaufmann, I., Olbrich, M., Lange, S., & Mathis, H. (2022). AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development. 2022 Kleinheubach Conference. 2022 Kleinheubach Conference, Miltenberg, Germany. bibtex: '@inproceedings{Maalouly_Hemker_Hedayat_Rückert_Kaufmann_Olbrich_Lange_Mathis_2022, place={Miltenberg, Germany}, title={AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development}, booktitle={2022 Kleinheubach Conference}, publisher={IEEE}, author={Maalouly, Jad and Hemker, Dennis and Hedayat, Christian and Rückert, Christian and Kaufmann, Ivan and Olbrich, Marcel and Lange, Sven and Mathis, Harald}, year={2022} }' chicago: 'Maalouly, Jad, Dennis Hemker, Christian Hedayat, Christian Rückert, Ivan Kaufmann, Marcel Olbrich, Sven Lange, and Harald Mathis. “AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development.” In 2022 Kleinheubach Conference. Miltenberg, Germany: IEEE, 2022.' ieee: J. Maalouly et al., “AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development,” presented at the 2022 Kleinheubach Conference, Miltenberg, Germany, 2022. mla: Maalouly, Jad, et al. “AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development.” 2022 Kleinheubach Conference, IEEE, 2022. short: 'J. Maalouly, D. Hemker, C. Hedayat, C. Rückert, I. Kaufmann, M. Olbrich, S. Lange, H. Mathis, in: 2022 Kleinheubach Conference, IEEE, Miltenberg, Germany, 2022.' conference: end_date: 2022-09-29 location: Miltenberg, Germany name: 2022 Kleinheubach Conference start_date: 2022-09-27 date_created: 2022-11-24T14:21:17Z date_updated: 2022-11-24T14:21:34Z department: - _id: '59' - _id: '485' keyword: - emc - pcb - electronic system development - machine learning - neural network language: - iso: eng main_file_link: - url: https://ieeexplore.ieee.org/document/9954484 place: Miltenberg, Germany project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: 2022 Kleinheubach Conference publication_identifier: eisbn: - 978-3-948571-07-8 publication_status: published publisher: IEEE status: public title: AI Assisted Interference Classification to Improve EMC Troubleshooting in Electronic System Development type: conference user_id: '38240' year: '2022' ...