@inproceedings{65836, author = {{Fichtler, Timm and Petzke, Lisa Irene and Grigoryan, Khoren and Koldewey, Christian and Dumitrescu, Roman}}, booktitle = {{Proceedings of the Annual Hawaii International Conference on System Sciences}}, issn = {{2572-6862}}, publisher = {{Hawaii International Conference on System Sciences}}, title = {{{Enhancing Product Management Performance through Digitalization: Advantages, Challenges, Design Fields}}}, doi = {{10.24251/hicss.2026.478}}, year = {{2026}}, } @article{65845, author = {{Kattenstroth, Fiona and Kranz, Michael and Hunger, Sebastian and Withot, Dennis and Hovemann, Aschot and Dumitrescu, Roman}}, issn = {{1877-0509}}, journal = {{Procedia Computer Science}}, pages = {{586--595}}, publisher = {{Elsevier BV}}, title = {{{Towards a digital factory twin: systematization of material flow simulation use cases}}}, doi = {{10.1016/j.procs.2026.02.100}}, volume = {{277}}, year = {{2026}}, } @article{65838, author = {{Rasor, Anja and Petzke, Lisa Irene and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{239--244}}, publisher = {{Elsevier BV}}, title = {{{Identifying Cost Drivers in Circular Business Model Planning: Insights from an Explorative Interview Study}}}, doi = {{10.1016/j.procir.2026.05.041}}, volume = {{140}}, year = {{2026}}, } @article{65840, author = {{Grigoryan, Khoren and Bauer, Eliana and Fichtler, Timm and Asmar, Laban and Kühn, Arno and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{916--921}}, publisher = {{Elsevier BV}}, title = {{{Design Principles and Process Model for Planning Data Analytics in Product Management}}}, doi = {{10.1016/j.procir.2026.05.154}}, volume = {{140}}, year = {{2026}}, } @article{65839, author = {{Petzke, Lisa Irene and Vehmeyer, Julia Marie and Rasor, Anja and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{228--233}}, publisher = {{Elsevier BV}}, title = {{{Organizational Capabilities for Implementing R-Strategies in Circular Value Networks}}}, doi = {{10.1016/j.procir.2026.05.039}}, volume = {{140}}, year = {{2026}}, } @inbook{65855, author = {{Twardzik, Jan Luca and Humpert, Lynn and Cichon, Gerrit and Dumitrescu, Roman}}, booktitle = {{Lecture Notes in Mechanical Engineering}}, isbn = {{9783032211569}}, issn = {{2195-4356}}, publisher = {{Springer Nature Switzerland}}, title = {{{Knowledge Gaps in Circular Product Development: A Systematic Literature Review of the Manufacturing Industry}}}, doi = {{10.1007/978-3-032-21157-6_39}}, year = {{2026}}, } @article{65856, author = {{Trienens, Malte and Busch, Vanessa and Wyrwich, Fabian and Hovemann, Aschot and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{1070--1075}}, publisher = {{Elsevier BV}}, title = {{{Unleashing the Potential of the Digital Product Passport in Engineering: A Structured Map for Sustainable Product Design}}}, doi = {{10.1016/j.procir.2026.05.394}}, volume = {{142}}, year = {{2026}}, } @article{65837, author = {{Vehmeyer, Julia Marie and Petzke, Lisa Irene and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{863--868}}, publisher = {{Elsevier BV}}, title = {{{The fellowship of the circle: Barriers to establishing partnerships for circular value creation}}}, doi = {{10.1016/j.procir.2026.05.145}}, volume = {{140}}, year = {{2026}}, } @inproceedings{65854, author = {{Wyrwich, Fabian and Trienens, Malte and Hovemann, Aschot and Dumitrescu, Roman}}, booktitle = {{2025 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD)}}, publisher = {{IEEE}}, title = {{{Fields of Action of a Digital Engineering Transformation Framework}}}, doi = {{10.1109/ictmod66732.2025.11371934}}, year = {{2026}}, } @article{65865, abstract = {{Mathematical problem solving is a highly complex competence that needs to be supported throughout the learning process. This study examines the role of problem-solving heuristics among 73 sixth-grade students in a German secondary school (Gesamtschule). Specifically, we focus on the empirical relationship between the occurrence of heuristics, their suitability, and application, as well as their contribution to problem-solving success. To this end, we developed a heuristic training that introduced strategy keys (heuristic aid cards) accompanied by explanatory videos. By leveraging variations in the successful application of the heuristics between students and across multiple sessions (73 students in 4 training situations and 3 problems in a final test), we discover from regression models with student and task-fixed effects that a successful use of heuristics (i.e., an heuristic occurred, that heuristic had a high suitability regarding the problem, and it was applied correctly) leads to more successful mathematical problem solving. Regarding the underlying mechanism, we find that all dimensions of heuristic use (occurrence, suitability, and application of heuristics) are positively related to problem-solving success. When comparing the predictive capacity of all three aspects, we identified the correct application of heuristics as particularly conducive for better problem-solving success. In comparing the group of students with high to those with low initial math competence, we find no significant differences in the relationship between heuristic use and problemsolving success across achievement groups. Our results emphasize the crucial role of heuristic application in mathematical problem solving, which generally benefits students regardless of their overall math competence.}}, author = {{Herold-Blasius, Raja and Kleinschmidt, Hannah and Ziller, Conrad}}, journal = {{Journal für Mathematik-Didaktik}}, number = {{6}}, title = {{{Dimensions of Heuristic Use in Mathematical Problem Solving: Evidence from Early Secondary School Students}}}, doi = {{https://doi.org/10.1007/s13138-026-00270-6}}, volume = {{47}}, year = {{2026}}, } @inproceedings{65901, author = {{Steffens, Hanna and Yigitbas, Enes and Sauer, Stefan}}, booktitle = {{Proceedings of the 28th International Conference on Human-Computer Interaction (HCII 2026)}}, publisher = {{Springer}}, title = {{{Effects of Vertical Price Placement on Consumer Behaviour: A VR-Based Investigation Including Eye Tracking}}}, year = {{2026}}, } @article{65753, author = {{Schenke, Maximilian and Haucke-Korber, Barnabas and Wallscheid, Oliver}}, issn = {{2169-3536}}, journal = {{IEEE Access}}, pages = {{1--1}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Safe Reinforcement Learning Direct Torque Control for Continuous Control Set Permanent Magnet Synchronous Motor Drives}}}, doi = {{10.1109/access.2026.3696042}}, year = {{2026}}, } @inproceedings{65903, author = {{Seidan, Salah and Yigitbas, Enes and Leichtweiß, Justus}}, booktitle = {{Proceedings of the 10th International Conference on Intelligent Computing and Virtual & Augmented Reality Simulations (ICVARS 2026)}}, publisher = {{IEEE}}, title = {{{Change Your Perspective - A VR Driving Simulator to Enhance Safety Awareness in Public Road Traffic}}}, year = {{2026}}, } @inproceedings{65904, author = {{Krings, Sarah Claudia and Yigitbas, Enes and Sauer, Stefan}}, booktitle = {{Proceedings of the 18th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2026)}}, publisher = {{ACM}}, title = {{{A Framework Supporting Context-Awareness for Transitional Cross-Reality Applications}}}, year = {{2026}}, } @article{65905, author = {{Yigitbas, Enes and Dell'Aquila, Alessio}}, journal = {{Proceedings of the ACM on Human-Computer Interaction - EICS }}, publisher = {{ACM}}, title = {{{Exploring the Dynamics of Authoring Interactive VR Environments: Human Collaboration vs. AI Assistance}}}, year = {{2026}}, } @unpublished{65916, author = {{Jakob, Johanna}}, title = {{{Diffeomorphism groups of compact locally polyhedral manifolds}}}, year = {{2026}}, } @inproceedings{56950, abstract = {{After nearly two decades of research, the question of a quantum PCP theorem for quantum Constraint Satisfaction Problems (CSPs) remains wide open. As a result, proving QMA-hardness of approximation for ground state energy estimation has remained elusive. Recently, it was shown [Bittel, Gharibian, Kliesch, CCC 2023] that a natural problem involving variational quantum circuits is QCMA-hard to approximate within ratio N^(1-eps) for any eps > 0 and N the input size. Unfortunately, this problem was not related to quantum CSPs, leaving the question of hardness of approximation for quantum CSPs open. In this work, we show that if instead of focusing on ground state energies, one considers computing properties of the ground space, QCMA-hardness of computing ground space properties can be shown. In particular, we show that it is (1) QCMA-complete within ratio N^(1-eps) to approximate the Ground State Connectivity problem (GSCON), and (2) QCMA-hard within the same ratio to estimate the amount of entanglement of a local Hamiltonian's ground state, denoted Ground State Entanglement (GSE). As a bonus, a simplification of our construction yields NP-completeness of approximation for a natural k-SAT reconfiguration problem, to be contrasted with the recent PCP-based PSPACE hardness of approximation results for a different definition of k-SAT reconfiguration [Karthik C.S. and Manurangsi, 2023, and Hirahara, Ohsaka, STOC 2024].}}, author = {{Gharibian, Sevag and Hecht, Carsten}}, booktitle = {{51st International Symposium on Mathematical Foundations of Computer Science (MFCS)}}, title = {{{Hardness of approximation for ground state problems}}}, year = {{2026}}, } @article{66001, abstract = {{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 = {{Henne, Kevin and Rahlf, Henning Christoph and Naumann, Marius and Meschede, Henning}}, issn = {{2590-1745}}, journal = {{Energy Conversion and Management: X}}, keywords = {{Microgrid, Decentralised Energy Systems, Multi-Agent System, Residential Demand-Side Management, Optimisation}}, location = {{Dubrovnik}}, pages = {{102030}}, publisher = {{Elsevier}}, title = {{{Towards Stakeholder-Aware Demand-Side management assessment in heterogeneous residential Microgrids: A Multi-Agent approach}}}, doi = {{https://doi.org/10.1016/j.ecmx.2026.102030}}, volume = {{31}}, year = {{2026}}, } @article{66060, author = {{Claes, Leander and Winkler, Michael}}, issn = {{1420-9004}}, journal = {{Nonlinear Differential Equations and Applications NoDEA}}, number = {{4}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Local strong solutions in a quasilinear Moore-Gibson-Thompson type model for thermoviscoelastic evolution in a standard linear solid}}}, doi = {{10.1007/s00030-026-01239-7}}, volume = {{33}}, year = {{2026}}, } @article{66057, author = {{Bullerjahn, Nils and Kovács, Balázs}}, journal = {{ArXiv}}, title = {{{Error estimates for $A$-stable backward difference full discretizations of Willmore flow of closed surfaces}}}, doi = {{10.48550/arXiv.2606.25934}}, year = {{2026}}, }