@phdthesis{52611,
  abstract     = {{Ultraschallsysteme für das Herstellen für Bond- und Schweißverbindungen in der Halbleiterfertigung zeigen auf Grund des Betriebes unter hohen Anregungsniveaus nichtlineare Materialeigenschaften. Dabei wirken unterschiedliche Einflussfaktoren auf die elektrischen Eigenschaften und die mechanischen Übertragungscharakteristiken der Ultraschallsysteme ein. Die Herausforderungen ein solches geprägtes System auszulegen oder effizient und zuverlässig zu betreiben, sind aufgrund der Nichtlinearitäten relativ groß.
Da für die Beschreibung der nichtlinearen Materialbeziehungen nur wenige Modelle und kaum quantitative Angaben vorliegen, werden die komplexen Wechselwirkungen von Materialparametern, Geometrie und Vorspannung des Schwingers, Betriebsgrößen (Strom, Spannung), Temperatur und Prozesslasten durch systematische Untersuchungen von Keramiken und Langevin-Schwingern messtechnisch erfasst. Aus den Messergebnissen werden einerseits eindimensionale Modelle für Voruntersuchungen als auch vollständige Materialparametersätze für die Simulation mittels dreidimensionaler FE-Modelle hergeleitet.
Eine Methodik zur Ermittlung der Materialparameter und ein auf iterativen Simulationen von FE-Modellen basierendes Werkzeug zur Simulation der komplexen Wechselwirkungen werden vorgestellt. Anhand eines exemplarischen Ultraschallsystems wird gezeigt, dass die Wirkungen temperaturbedingter Vorspannungsverluste, Änderungen des elektrischen Klemmenverhaltens und Amplituden- und Frequenzänderungen während des Betriebes bei großen Amplituden und Prozesslasten durch die Variationen des Keramikvolumens und der Keramikposition positiv beeinflusst werden können.}},
  author       = {{Dymel, Collin}},
  isbn         = {{9783844093964}},
  keywords     = {{Nichtlineares piezoelektrisches Verhalten, Dehnungsabhängigkeit, Vorspannungseinfluss, Temperatureinfluss, Lasteinfluss, Langevin-Schwinger, Ultraschallwandler, Ultraschallbonden, FEM-Modell, Ultraschallschweißen, BVD-Modell}},
  pages        = {{134}},
  publisher    = {{Shaker Verlag}},
  title        = {{{Modellbasierte Entwicklung von Ultraschallwandlern unter der Berücksichtigung von Nichtlinearitäten}}},
  volume       = {{16}},
  year         = {{2024}},
}

@article{50726,
  abstract     = {{<jats:p>Resistance spot‐welded joints containing press‐hardened steels are seen to exhibit a fracture mode called total dome failure, where the weld nugget completely separates from one steel sheet along the weld nugget edge. The effect of weld nugget shape and material property gradients is studied based on damage mechanics modeling and experimental validation to shed light on the underlying influencing factors. For a three‐steel‐sheet spot‐welded joint combining DP600 (1.5 mm)–CR1900T (1.0 mm)–CR1900T (1.0 mm), experiments under shear loading reveal that fracture occurs in the DP600 sheet along the weld nugget edge. In subsequent numerical simulation studies with damage mechanics models whose parameters are independently calibrated for every involved material configuration, three variations of the geometrical joint configuration are considered—an approximation of the real joint, one variation with a steeper weld nugget shape, and one variation with a less pronounced gradient between weld nugget material and heat‐affected zone material properties. The results of the finite‐element simulations show that a shallower weld nugget and a more pronounced material gradient lead to a faster increase of plastic strain at the edge of the weld nugget and promote the occurrence of total dome failure.</jats:p>}},
  author       = {{Schuster, Lilia and Olfert, Viktoria and Sherepenko, Oleksii and Fehrenbach, Clemens and Song, Shiyuan and Hein, David and Meschut, Gerson and Biro, Elliot and Münstermann, Sebastian}},
  issn         = {{1611-3683}},
  journal      = {{steel research international}},
  keywords     = {{Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics}},
  publisher    = {{Wiley}},
  title        = {{{Influences of Weld Nugget Shape and Material Gradient on the Shear Strength of Resistance Spot‐Welded Joints}}},
  doi          = {{10.1002/srin.202300530}},
  year         = {{2024}},
}

@phdthesis{52501,
  author       = {{ Hassel, Richard}},
  pages        = {{161}},
  title        = {{{Zur Abscheidung von Tröpfchen-Aerosolen in filternden Abscheidern}}},
  doi          = {{10.17619/UNIPB/1-1870}},
  year         = {{2024}},
}

@misc{52639,
  author       = {{Zink, Timm Florian}},
  pages        = {{142}},
  title        = {{{Untersuchung des Lösungsmitellseinflusses auf die Synthese von Manganoxid-Nanopartikeln in der Flammenspraypyrolyse}}},
  year         = {{2024}},
}

@article{52233,
  abstract     = {{ELDIRK methods are defined to have an <jats:italic>Explicit Last</jats:italic> stage in the general Butcher array of <jats:italic>Diagonal Implicit Runge-Kutta</jats:italic> methods, with the consequence, that no additional system of equations must be solved, compared to the embedded RK method. Two general formulations for second- and third-order ELDIRK methods have been obtained recently in Mahnken [21] with specific schemes,  e.g. for the embedded implicit Euler method, the embedded trapezoidal-rule and the embedded Ellsiepen method. In the first part of this paper, we investigate some general stability characteristics of ELDIRK methods, and it will be shown that the above specific RK schemes are not A-stable. Therefore, in the second part, the above-mentioned general formulations are used for further stability investigations, with the aim to construct new second- and third-order ELDIRK methods which simultaneously are A-stable. Two numerical examples are concerned with the curing for a thermosetting material and phase-field RVE modeling for crystallinity and orientation. The numerical results confirm the theoretical results on convergence order and stability.}},
  author       = {{Mahnken, Rolf and Westermann, Hendrik}},
  issn         = {{0178-7675}},
  journal      = {{Computational Mechanics}},
  keywords     = {{Applied Mathematics, Computational Mathematics, Computational Theory and Mathematics, Mechanical Engineering, Ocean Engineering, Computational Mechanics}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Construction of A-stable explicit last-stage diagonal implicit Runge–Kutta (ELDIRK) methods}}},
  doi          = {{10.1007/s00466-024-02442-y}},
  year         = {{2024}},
}

@article{52652,
  author       = {{Herdramm, Henrike}},
  journal      = {{BloKK. Der Blog des Zentrums für Komparative Theologie und Kulturwissenschaften}},
  keywords     = {{Ideologiekritik, Tiertheologie, Tierethik}},
  title        = {{{Das Potenzial von Ideologiekritik im Religionsunterricht}}},
  year         = {{2024}},
}

@misc{52663,
  abstract     = {{Context
Static analyses are well-established to aid in understanding bugs or vulnerabilities during the development process or in large-scale studies. A low false-positive rate is essential for the adaption in practice and for precise results of empirical studies. Unfortunately, static analyses tend to report where a vulnerability manifests rather than the fix location. This can cause presumed false positives or imprecise results.
Method
To address this problem, we designed an adaption of an existing static analysis algorithm that can distinguish between a manifestation and fix location, and reports error chains. An error chain represents at least two interconnected errors that occur successively, thus building the connection between the fix and manifestation location. We used our tool CogniCryptSUBS for a case study on 471 GitHub repositories, a performance benchmark to compare different analysis configurations, and conducted an expert interview.
Result
We found that 50 % of the projects with a report had at least one error chain. Our runtime benchmark demonstrated that our improvement caused only a minimal runtime overhead of less than 4 %. The results of our expert interview indicate that with our adapted version participants require fewer executions of the analysis.
Conclusion
Our results indicate that error chains occur frequently in real-world projects, and ignoring them can lead to imprecise evaluation results. The runtime benchmark indicates that our tool is a feasible and efficient solution for detecting error chains in real-world projects. Further, our results gave a hint that the usability of static analyses may benefit from supporting error chains.}},
  author       = {{Wickert, Anna-Katharina and Schlichtig, Michael and Vogel, Marvin and Winter, Lukas and Mezini, Mira and Bodden, Eric}},
  keywords     = {{Static analysis, error chains, false positive re- duction, empirical studies}},
  title        = {{{Supporting Error Chains in Static Analysis for Precise Evaluation Results and Enhanced Usability}}},
  year         = {{2024}},
}

@misc{52684,
  abstract     = {{This is the data set of the project Henze-Digital. It contains project specific authority files (e.g., persons, organizations, places) and editions (e.g., letters, documents).}},
  author       = {{Ried, Dennis and Capelle, Irmlind and Minetti, Elena and Tumat, Antje}},
  publisher    = {{LibreCat University}},
  title        = {{{HenDi-Data (data package) v3.1.0}}},
  doi          = {{10.5281/ZENODO.10839525}},
  year         = {{2024}},
}

@misc{51677,
  abstract     = {{This is the data set of the project Henze-Digital. It contains project specific authority files (e.g., persons, organizations, places) and editions (e.g., letters, documents).}},
  author       = {{Capelle, Irmlind and Minetti, Elena and Ried, Dennis and Tumat, Antje}},
  publisher    = {{Henze-Digital}},
  title        = {{{HenDi-Data (data package) v3.0.0}}},
  doi          = {{10.5281/ZENODO.10666370}},
  year         = {{2024}},
}

@misc{52683,
  author       = {{Ried, Dennis and Minetti, Elena and Capelle, Irmlind}},
  publisher    = {{LibreCat University}},
  title        = {{{HenDi-ODD v3.1.0}}},
  doi          = {{10.5281/ZENODO.10839530}},
  year         = {{2024}},
}

@misc{52685,
  author       = {{Ried, Dennis}},
  publisher    = {{LibreCat University}},
  title        = {{{HenDi-WebApp v3.1.0}}},
  doi          = {{10.5281/ZENODO.10839555}},
  year         = {{2024}},
}

@unpublished{52691,
  abstract     = {{We prove Feynman-Kac formulas for the semigroups generated by selfadjoint
operators in a class containing Fr\"ohlich Hamiltonians known from solid state
physics. The latter model multi-polarons, i.e., a fixed number of quantum
mechanical electrons moving in a polarizable crystal and interacting with the
quantized phonon field generated by the crystal's vibrational modes. Both the
electrons and phonons can be confined to suitable open subsets of Euclidean
space. We also include possibly very singular magnetic vector potentials and
electrostatic potentials. Our Feynman-Kac formulas comprise Fock space
operator-valued multiplicative functionals and can be applied to every vector
in the underlying Hilbert space. In comparison to the renormalized Nelson
model, for which analogous Feynman-Kac formulas are known, the analysis of the
creation and annihilation terms in the multiplicative functionals requires
novel ideas to overcome difficulties caused by the phonon dispersion relation
being constant. Getting these terms under control and generalizing other
construction steps so as to cover confined systems are the main achievements of
this article.}},
  author       = {{Hinrichs, Benjamin and Matte, Oliver}},
  booktitle    = {{arXiv:2403.12147}},
  title        = {{{Feynman-Kac formulas for semigroups generated by multi-polaron  Hamiltonians in magnetic fields and on general domains}}},
  year         = {{2024}},
}

@article{52686,
  author       = {{Ahmed, Qazi Arbab and Wiersema, Tobias and Platzner, Marco}},
  issn         = {{2509-3428}},
  journal      = {{Journal of Hardware and Systems Security}},
  keywords     = {{General Engineering, Energy Engineering and Power Technology}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Post-configuration Activation of Hardware Trojans in FPGAs}}},
  doi          = {{10.1007/s41635-024-00147-5}},
  year         = {{2024}},
}

@inbook{52505,
  author       = {{Gövert, Andre and Niederhaus, Constanze and Blumberg, Eva}},
  booktitle    = {{Mehrsprachigkeit in der Schule – Sprachbildung im und durch Sachunterricht}},
  pages        = {{295--309}},
  publisher    = {{Kohlhammer}},
  title        = {{{Professionalisierung für Sprachbildung aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen eines Vertiefungsseminars in der ersten Phase der sachunterrichtsdidaktischen Lehrer* innenbildung.}}},
  year         = {{2024}},
}

@inbook{52506,
  author       = {{Vasylyeva, Tetyana and Ehmke, Timo and Gövert, Andre and Kassem, Amani and Niederhaus, Constanze}},
  booktitle    = {{Mehrsprachigkeit in der Schule – Sprachbildung im und durch Sachunterricht}},
  pages        = {{310--330}},
  publisher    = {{Kohlhammer}},
  title        = {{{DaZ-Kompetenzen angehender Lehrkräfte des Faches Sachunterricht sowie der aus dem Sachunterricht hervorgehenden Fächer}}},
  year         = {{2024}},
}

@article{52702,
  abstract     = {{<jats:p>The editorial introduces the special issue Knowledge by Design in Education: Key challenges and experiences from research practice, posing key questions, offering an insight into ongoing discussions, and presenting an overview of the included articles.</jats:p>}},
  author       = {{Brase, Alexa Kristin and Jenert, Tobias}},
  issn         = {{2511-0667}},
  journal      = {{EDeR. Educational Design Research}},
  number       = {{1}},
  publisher    = {{Staats- und Universitatsbibliothek Hamburg Carl von Ossietzky}},
  title        = {{{Knowledge by Design in Education}}},
  doi          = {{10.15460/eder.8.1.2213}},
  volume       = {{8}},
  year         = {{2024}},
}

@article{52712,
  author       = {{Buyken, Anette and Libuda, Lars}},
  journal      = {{DGEwissen}},
  title        = {{{Ernährung und Alltagsbewältigung - Ein Spannungsfeld für Individuum, Haushalt und Gesellschaft}}},
  year         = {{2024}},
}

@inproceedings{52379,
  author       = {{Hüsing, Sven and Schulte, Carsten and Sparmann, Sören and Bolte, Mario}},
  booktitle    = {{Proceedings of the 55th ACM Technical Symposium on Computer Science Education V. 1}},
  publisher    = {{ACM}},
  title        = {{{Using Worked Examples for Engaging in Epistemic Programming Projects}}},
  doi          = {{10.1145/3626252.3630961}},
  year         = {{2024}},
}

@article{52726,
  abstract     = {{Heteroclinic structures organize global features of dynamical systems. We analyse whether heteroclinic structures can arise in network dynamics with higher-order interactions which describe the nonlinear interactions between three or more units. We find that while commonly analysed model equations such as network dynamics on undirected hypergraphs may be useful to describe local dynamics such as cluster synchronization, they give rise to obstructions that allow to design of heteroclinic structures in phase space. By contrast, directed hypergraphs break the homogeneity and lead to vector fields that support heteroclinic structures.}},
  author       = {{Bick, Christian and von der Gracht, Sören}},
  issn         = {{2051-1329}},
  journal      = {{Journal of Complex Networks}},
  keywords     = {{Applied Mathematics, Computational Mathematics, Control and Optimization, Management Science and Operations Research, Computer Networks and Communications}},
  number       = {{2}},
  publisher    = {{Oxford University Press (OUP)}},
  title        = {{{Heteroclinic dynamics in network dynamical systems with higher-order interactions}}},
  doi          = {{10.1093/comnet/cnae009}},
  volume       = {{12}},
  year         = {{2024}},
}

@book{52725,
  editor       = {{Becher, Andrea}},
  publisher    = {{Klinkhardt}},
  title        = {{{Politische Bildung im Sachunterricht. Potenziale - Positionen - Perspektiven}}},
  year         = {{2024}},
}