@inproceedings{64800,
  abstract     = {{Intensive ultrasonic cleaning of surfaces by means of a lead-free ultrasonic transducer with focusing sonotrode
Ultrasonic cleaning baths are probably a coincidental development: After underwater sonars had already been successfully used to detect submarines before 1920, it was probably observed in this environment that the ultrasonic oscillators not only showed a self-cleaning effect but also cavitation damage. At the beginning of the 1950s, the first ultrasonic cleaning devices finally came onto the market. Today, the range of applications ranges from household appliances for jewellery and eyewear cleaning to classic cleaning baths for metal parts and systems for cleaning highly sensitive electronic components. There is a certain gap in handheld, mobile cleaning equipment. Although devices for spot cleaning of textiles are known, the cleaning effect is usually low. 
Due to the directive 2011/65/EU on the restriction of the use of hazardous substances in electrical and electronic equipment (RoHS) [1] lead should no longer be used in technical devices. As today’s standard ceramics for medium and high-power ultrasonic transducers typically contain lead, there is a need to explore the use of lead-free ceramics in this field. Honda [2] already offers a cleaning transducer based on lead-free piezoelectric ceramics, but it is designed to be used in cleaning baths.
This article presents the model-based development of a highly innovative ultrasonic cleaner. On the one hand, lead-free piezoelectric ceramics are used, and on the other hand, a special sonotrode has been developed that concentrates the sound in such a way that a strong cavitation and thus cleaning effect is achieved with comparatively low power in a short time. Coupled field finite element method was used to find an appropriate geometry for the focussing sonotrode. The comparison of simulation and measurement results shows that the lead-free piezoceramics used do their job well and can keep up with standard ceramics, but more ceramic volume is needed to achieve same power. An advanced control concept was elaborated to ensure continuous hard cavitation at varying distances between the sonotrode and the part to be cleaned. Cleaning results for different surfaces and contaminations are presented. The concept of the focusing sonotrode shows that a convincing cleaning result can be achieved even with low power and in short time, provided that the oscillation system and control electronics are suitably coordinated.

References
[1] http://data.europa.eu/eli/dir/2011/65/2024-08-01 
[2] https://en.honda-el.co.jp/product/ceramics/lineup/lead_off/lead-off 
}},
  author       = {{Hemsel, Tobias and Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Sextro, Walter}},
  location     = {{Paderborn, Germany}},
  title        = {{{Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode}}},
  year         = {{2025}},
}

@inproceedings{61755,
  author       = {{Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}},
  location     = {{Vilnius, Lithuania}},
  title        = {{{Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers}}},
  year         = {{2025}},
}

@inproceedings{61757,
  author       = {{Scheidemann, Claus and Porzenheim, Julius and Hemsel, Tobias and Sextro, Walter}},
  location     = {{Paderborn, Germany}},
  title        = {{{Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers}}},
  year         = {{2025}},
}

@inbook{62988,
  author       = {{Amakor, Augustina C. and Berkemeier, Manuel B. and Wohlleben, Meike Claudia and Sextro, Walter and Peitz, Sebastian}},
  booktitle    = {{Lecture Notes in Computer Science}},
  isbn         = {{9783032045546}},
  issn         = {{0302-9743}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Surrogate-Assisted Multi-objective Design of Complex Multibody Systems}}},
  doi          = {{10.1007/978-3-032-04555-3_21}},
  year         = {{2025}},
}

@inproceedings{64812,
  author       = {{Hofmann, Julia and Teutenberg, Dominik and Meschut, Gerson}},
  booktitle    = {{25. Kolloquium: Gemeinsame Forschung in der Klebtechnik}},
  location     = {{Köln}},
  title        = {{{Methodenentwicklung zur numerischen Auslegung von Klebverbindungen mit lackierten Fügeteilen}}},
  year         = {{2025}},
}

@inproceedings{64611,
  abstract     = {{Für die Aufrechterhaltung der natürlichen Ressourcen ist eine effiziente Nutzung dieser essenziell. Vor diesem Hintergrund untersucht das vorliegende Paper die Rolle der Kreislaufwirtschaft als wegweisendes Wirtschaftsmodell, das von der Europäischen Union gefördert wird. Ziel der Kreislaufwirtschaft ist es, den Ressourcenverbrauch und die Abfallproduktion zu minimieren, indem ein kontinuierlicher Kreislauf aus Nutzung, Wiederverwendung und Recycling von Materialien geschaffen wird. 
Ein zentraler Aspekt dabei ist der Produktentwicklungsprozess (PEP) - ein vielschichtiger Prozess mit zahlreichen Einflussfaktoren und theoretisch unbegrenzten Gestaltungsmöglichkeiten. Diese Vielfalt führt jedoch zu erheblichen Entscheidungsunsicherheiten, die die Umsetzung von Kreislaufwirtschaftsprinzipien erschweren können. Um diese Herausforderungen zu adressieren, wird ein methodischer Prozess vorgestellt, der eine systematische Klassifizierung im Zusammenhang mit umliegenden Bauteilen ermöglicht. Die Methodik basiert auf einer strukturierten Bewertung von Bauteilen hinsichtlich ihrer Relevanz für die Kreislaufwirtschaft. Dabei werden zentrale Aspekte wie Wiederverwendbarkeit, Recyclingfähigkeit und Ressourceneffizienz berücksichtigt, darunter: 
•	Handelt es sich um ein Gebrauchs- oder Verbrauchsprodukt?
•	Ist das Bauteil eine Wiederverwendung oder eine Neufertigung?
•	Ist das Bauteil standardisiert, zugekauft oder individuell ausgerichtet?
•	Welche primäre Funktion nimmt das Bauteil ein?
Diese strukturierte Klassifizierung unterstützt die Entscheidungsfindung bereits früh im PEP. Sie ermöglicht es Produktentwickelnden, Potenziale für die Kreislaufwirtschaft frühzeitig zu erkennen und gezielt nachhaltige Maßnahmen zu ergreifen.
Die entwickelte Methodik bildet somit eine Grundlage für die Integration kreislaufwirtschaftlicher Prinzipien in den Entwicklungsprozess. Insbesondere im Kontext moderner Anforderungen des Mobility Management zeigt sich ihr Potenzial, nachhaltige Innovationen gezielt zu fördern und die Umsetzung der Kreislaufwirtschaft in der industriellen Praxis zu erleichtern.}},
  author       = {{Rohde, Katharina and Ott, Manuel and Budde, Finn Lukas and Mozgova, Iryna}},
  booktitle    = {{Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte}},
  editor       = {{Proff, Heike}},
  location     = {{Duisburg}},
  publisher    = {{Springer Nature Meteor}},
  title        = {{{Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte}}},
  year         = {{2025}},
}

@inproceedings{64804,
  abstract     = {{Das Ultraschallschweißen ist in der Verpackungs-, Halbleiter- und Automobilindustrie weit verbreitet. Neben dem Schweißen von Blechen bietet es die Möglichkeit, Folien oder Hülsen zu verschweißen. Konventionelle Schweißsysteme arbeiten mit Längs- oder Biegeschwingungen, deren Hauptanteil in der Schweißebene liegt. Der orthogonale Anteil verursacht zusätzliche Belastungen im Schweißgut. Bei der Verwendung von Torsionsschwingungen wird die orthogonale Komponente der Schwingung nahezu eliminiert. 
In diesem Beitrag wird ein System vorgestellt, bei dem die Torsionsschwingung durch tangentiale Polarisation der Piezokeramiken erzeugt wird. Der Transducer ist axial oberhalb des Schweißpunktes platziert, sodass die Normalkraft momentfrei aufgebracht wird. Das Schweißwerkzeug weicht beim Schweißvorgang daher seitlich nicht aus. Zudem wird das Schweißen an schwer zugänglichen Positionen vereinfacht, da der Systemaufbau deutlich schlanker ist als konventionelle Ultraschallschweißsysteme.
Die Auslegung des Torsionsschwingsystems stellt eine Herausforderung dar. Insbesondere muss die Lagerung des Schwingers betrachtet werden, da diese die Normalkraft übertragen und zugleich die Schwingung nicht beeinträchtigen soll. Der Schweißprozess bewirkt eine Verschiebung von Schwingungsknoten und Resonanzfrequenzen. Im Rahmen des Vortrags wird ein Finite-Elemente-Simulationsmodell vorgestellt, das in Kombination mit einem Lastmodell das Systemverhalten während des Schweißprozesses abbildet. Die Geometrie des Transducers wurde schrittweise so angepasst, dass die Schwingamplitude im Lagerungspunkt minimiert wird.  
}},
  author       = {{Dohmen, Markus Daniel and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias and Sextro, Walter}},
  title        = {{{Modellgestützte Optimierung eines Ultraschall-Torsionsschweißsystems}}},
  year         = {{2025}},
}

@article{64824,
  abstract     = {{<jats:p>(1) Background: As digitalisation transforms society, digital competences are increasingly essential. Yet students’ digital competences often vary significantly, largely influenced by socio-economic background. Some schools—termed “resilient schools”—effectively counter these disadvantages and foster high digital competence. This study investigates the prevalence of such schools and examines how they differ from others. (2) Methods: Drawing on representative ICILS 2023 data, quantitative secondary analyses—including descriptive statistics, t-tests, and multiple regression—were conducted. Following the identification of resilient schools, in-depth analyses focus on those countries with substantial proportions of resilient schools above 10 percent (Austria, Italy, and Portugal), as these countries seem to have effective strategies to foster school resilience. (3) Results: The findings highlight considerable cross-national variation, indicating that school resilience is context-dependent. Resilient schools consistently emphasise student learning-related factors—such as ICT-related attitudes and educational aspirations—while the influence of home environments is less pronounced than in other schools. (4) Conclusions: Strengthening student learning-related factors appears to be crucial for building digital resilience. These insights can inform policy and practice aimed at fostering educational equity and closing the digital divide, particularly in socio-economically disadvantaged contexts.</jats:p>}},
  author       = {{Niemann, Jan and Eickelmann, Birgit and Drossel, Kerstin}},
  issn         = {{2227-7102}},
  journal      = {{Education Sciences}},
  number       = {{7}},
  publisher    = {{MDPI AG}},
  title        = {{{Overcoming Digital Inequalities—Identification and Characterisation of Digitally Resilient Schools in Different Countries Using ICILS 2023 Data}}},
  doi          = {{10.3390/educsci15070898}},
  volume       = {{15}},
  year         = {{2025}},
}

@inproceedings{61202,
  abstract     = {{The number of datasets on the web of data increases continuously. However, the knowledge contained therein cannot be fully utilized without finding links between the entities contained in these datasets. Equivalent entities can not be identified solely by checking the equivalence of IRIs because of the different origins and naming schemes of different data providers. Yet, such equivalences can be discovered by computing the similarity of their attributes. In this paper we propose GLIDE, an approach that links entities from two different datasets by embedding a joint model of these datasets enriched by additional relations describing the similarity of literals. The joint model is embedded into a latent vector space while paying attention to juxtaposing similar literals. We evaluate our approach against state-of-the-art algorithms using real-world datasets commonly used in link discovery literature. The results show that GLIDE outperforms all baselines on 5 of 7 datasets with perfect or near-perfect accuracy. Our approach achieves its best performance on datasets that feature several literals with similarities. Our experiments indicate that researchers should not only pay attention to equal literals in knowledge graph embedding but should also be aware of the distance between similar literals.}},
  author       = {{Becker, Alexander and Ngonga Ngomo, Axel-Cyrille and Sherif, Mohamed }},
  booktitle    = {{The Semantic Web – ISWC 2025}},
  keywords     = {{becker sherif enexa sailproject dice simba ngonga whale}},
  title        = {{{GLIDE: Knowledge Graph Linking using Distance-Aware Embeddings}}},
  year         = {{2025}},
}

@article{61134,
  author       = {{Manzoor, Ali and Speck, René and Zahera, Hamada Mohamed Abdelsamee and Saleem, Muhammad and Moussallem, Diego and Ngonga Ngomo, Axel-Cyrille}},
  issn         = {{2169-3536}},
  journal      = {{IEEE Access}},
  pages        = {{1--1}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Multilingual Relation Extraction - A Survey}}},
  doi          = {{10.1109/access.2025.3604258}},
  year         = {{2025}},
}

@inbook{61222,
  author       = {{Lenke, Michael and Klowait, Nils and Biere, Lea and Schulte, Carsten}},
  booktitle    = {{Lecture Notes in Computer Science}},
  isbn         = {{9783032012210}},
  issn         = {{0302-9743}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Assessing AI Literacy: A Systematic Review of Questionnaires with Emphasis on Affective, Behavioral, Cognitive, and Ethical Aspects}}},
  doi          = {{10.1007/978-3-032-01222-7_8}},
  year         = {{2025}},
}

@article{61223,
  abstract     = {{<jats:p>Contemporary debates about artificial intelligence (AI) still treat automation as a straightforward substitution of human labor by machines. Drawing on Goffman’s dramaturgical sociology, this paper reframes AI in the workplace as <jats:italic>supplementary</jats:italic> rather than <jats:italic>substitutive</jats:italic> automation. We argue that the central—but routinely overlooked—terrain of struggle is symbolic-interactional: workers continuously stage, conceal, and re-negotiate what counts as “real” work and professional competence. Large language models (LLMs) such as ChatGPT exemplify this dynamic. They quietly take over the invisible, routinised tasks that underpin cognitive occupations (editing, summarizing, first-draft production) while leaving humans to enact the highly visible or relational facets that sustain occupational prestige. Drawing on diverse sources to illustrate our theoretical argument, we show how individual workers, dramaturgical teams, and entire professional fields manage impressions of expertise in order to counter status threats, renegotiate fees, or obscure the extent of AI assistance. The paper itself, having been intentionally written with the ‘aid’ of all presently available frontier AI models, serves as a meta-reflexive performance of professional self-staging. The dramaturgical framework clarifies why utopian tales of friction-free augmentation and dystopian narratives of total displacement both misread how automation is actually unfolding. By foregrounding visibility, obfuscation, and impression management, the article presents a differentiated case for AI’s impact on the performative structure of work, outlines diagnostic tools for assessing real-world AI exposure beyond hype-driven headlines, and argues for a more human-centered basis for evaluating policy responses to the ‘fourth industrial revolution.’ In short, AI enters the labor process not as an autonomous actor, but as a prop within an ongoing social performance—one whose scripts, stages, and audiences remain irreducibly human.</jats:p>}},
  author       = {{Klowait, Nils and Erofeeva, Maria}},
  issn         = {{2297-7775}},
  journal      = {{Frontiers in Sociology}},
  publisher    = {{Frontiers Media SA}},
  title        = {{{The presentation of self in the age of ChatGPT}}},
  doi          = {{10.3389/fsoc.2025.1614473}},
  volume       = {{10}},
  year         = {{2025}},
}

@inbook{61226,
  author       = {{Erofeeva, Maria and Klowait, Nils and Belov, Mikael and Soulié, Yoann}},
  booktitle    = {{Communications in Computer and Information Science}},
  isbn         = {{9783031980794}},
  issn         = {{1865-0929}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Leveraging VR Tools for Inclusive Education: Implications from Sign Language Learning in VRChat}}},
  doi          = {{10.1007/978-3-031-98080-0_10}},
  year         = {{2025}},
}

@article{61241,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>Given the presence of fake news and pseudoscience (often disguised as physics), the importance of inoculating citizens against this type of misinformation has gained increasing attention in education. This is a goal that all subjects should pursue equally from their respective disciplinary perspectives. &amp;#xD;The paper presents a teaching approach to protect physics students from misinformation and pseudoscience by combining these three common strategies: First, understanding the fundamental principles of the Nature of Science. Second, identifying techniques of Science Denial. And third, applying heuristics for evaluating (supposedly) scientific information. Finally, the paper offers practical suggestions for applying these strategies in a master's-level physics course, using examples from the field of physics.</jats:p>}},
  author       = {{Webersen, Yvonne and Riese, Josef}},
  issn         = {{0143-0807}},
  journal      = {{European Journal of Physics}},
  publisher    = {{IOP Publishing}},
  title        = {{{Protecting physics students from pseudoscience - combining strategies for a comprehensive teaching approach}}},
  doi          = {{10.1088/1361-6404/ae03f6}},
  year         = {{2025}},
}

@article{61245,
  author       = {{Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan and Sperling, Jan}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{3}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Entanglement between dependent degrees of freedom: Quasiparticle correlations}}},
  doi          = {{10.1103/physreva.111.032404}},
  volume       = {{111}},
  year         = {{2025}},
}

@article{61246,
  abstract     = {{<jats:title>Abstract</jats:title>
          <jats:p>The time-dependent one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral step for the Hamiltonian term with a variational step for the nonlinear term. The Hamiltonian term is treated as an integrating factor by forward and backward Fourier transforms, which are here carried out classically. This split allows us to avoid higher-order time integration schemes, to apply a first-order explicit time stepping for the remaining nonlinear NLSE term in a variational algorithm block, and thus to avoid numerical instabilities. We demonstrate that the analytical solution is reproduced with a small root mean square error for a long time interval over which a nonlinear soliton propagates significantly forward in space while keeping its shape. We analyze the accuracy and complexity of the quantum algorithm, the expressibility of the ansatz circuit and compare it with classical approaches. Furthermore, we investigate the influence of algorithm parameters on the accuracy of the results, including the temporal step width and the depth of the quantum circuit.</jats:p>}},
  author       = {{Köcher, Nikolas and Rose, Hendrik and Bharadwaj, Sachin S. and Schumacher, Jörg and Schumacher, Stefan}},
  issn         = {{2045-2322}},
  journal      = {{Scientific Reports}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm}}},
  doi          = {{10.1038/s41598-025-05660-3}},
  volume       = {{15}},
  year         = {{2025}},
}

@article{61249,
  author       = {{Ai, Qiang and Wingenbach, Jan and Yang, Xinmiao and Wei, Jing and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Ma, Xuekai and Gao, Tingge}},
  issn         = {{2331-7019}},
  journal      = {{Physical Review Applied}},
  number       = {{2}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice}}},
  doi          = {{10.1103/physrevapplied.23.024029}},
  volume       = {{23}},
  year         = {{2025}},
}

@inbook{61275,
  author       = {{Hagengruber, Ruth Edith}},
  booktitle    = {{The Routledge Companion to Philosophy of Time}},
  editor       = {{Emery, Nina}},
  isbn         = {{9781003495611}},
  publisher    = {{Routledge}},
  title        = {{{Émilie Du Châtelet on Time}}},
  doi          = {{10.4324/9781003495611-9}},
  year         = {{2025}},
}

@article{61285,
  author       = {{Herzig, Bardo}},
  issn         = {{1862-5231}},
  journal      = {{Erziehungswissenschaft. Mitteilungen der Deutschen Gesellschaft für Erziehungswissenschaft. Erziehungswissenschaft nach ChatGPT}},
  number       = {{70, Jg.36/2025}},
  pages        = {{13--18}},
  publisher    = {{Barbara Budrich}},
  title        = {{{Die (produktive) Rolle von generativer KI im erziehungswissenschaftlichen Diskurs}}},
  year         = {{2025}},
}

@article{61189,
  author       = {{Herzig, Bardo}},
  issn         = {{1433-4674}},
  journal      = {{SchulVerwaltung Bayern }},
  number       = {{7-8}},
  pages        = {{213--215}},
  publisher    = {{Carl Link}},
  title        = {{{Künstliche Intelligenz und professionsbezogene Aufgaben von Lehrkräften}}},
  year         = {{2025}},
}