@article{37711,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Polarons influence decisively the performance of lithium niobate for optical applications. In this work, the formation of (defect) bound polarons in lithium niobate is studied by ab initio molecular dynamics. The calculations show a broad scatter of polaron formation times. Rising temperature increases the share of trajectories with long formation times, which leads to an overall increase of the average formation time with temperature. However, even at elevated temperatures, the average formation time does not exceed the value of 100 femtoseconds, i.e., a value close to the time measured for free, i.e., self-trapped polarons. Analyzing individual trajectories, it is found that the time required for the structural relaxation of the polarons depends sensitively on the excitation of the lithium niobate high-frequency phonon modes and their phase relation.</jats:p>}},
  author       = {{Krenz, Marvin and Gerstmann, Uwe and Schmidt, Wolf Gero}},
  issn         = {{0947-8396}},
  journal      = {{Applied Physics A}},
  keywords     = {{General Materials Science, General Chemistry}},
  pages        = {{480}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Bound polaron formation in lithium niobate from ab initio molecular dynamics}}},
  doi          = {{10.1007/s00339-022-05577-y}},
  volume       = {{128}},
  year         = {{2022}},
}

@inproceedings{43744,
  abstract     = {{We demonstrate theoretically and experimentally complex correlations in the photon numbers of two-mode quantum states using measurement-induced nonlinearity. For this, we combine the interference of coherent states and single photons with photon sub-traction.}},
  author       = {{Meier, Torsten and Hoepker, Jan Philipp and Protte, Maximilian and Eigner, Christof and Silberhorn, Christine and Sharapova, Polina R. and Sperling, Jan and Bartley, Tim}},
  booktitle    = {{Conference on Lasers and Electro-Optics: Applications and Technology}},
  isbn         = {{978-1-957171-05-0}},
  location     = {{San Jose, California United States}},
  pages        = {{JTu3A. 17}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Two-Mode Photon-Number Correlations Created by Measurement-Induced Nonlinearity}}},
  doi          = {{10.1364/CLEO_AT.2022.JTu3A.17}},
  year         = {{2022}},
}

@article{33484,
  abstract     = {{We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Furthermore, we create so-called gray tracking in KTP and investigate the ionic conductivity in theses areas. A local unintended reduction of the ionic conductivity is observed in the gray-tracked regions, which also induce additional optical absorption in the material. We show that a thermal treatment in an oxygen-rich atmosphere removes the gray tracking and brings the ionic conductivity as well as the optical transmission back to the original level. These studies can help to choose the best material and treatment for specific applications.}},
  author       = {{Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine and Eigner, Christof}},
  issn         = {{2073-4352}},
  journal      = {{Crystals}},
  pages        = {{1359}},
  title        = {{{DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking}}},
  doi          = {{10.3390/cryst12101359}},
  volume       = {{12}},
  year         = {{2022}},
}

@article{44163,
  author       = {{Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}},
  issn         = {{0885-8993}},
  journal      = {{IEEE Transactions on Power Electronics}},
  keywords     = {{Electrical and Electronic Engineering}},
  number       = {{11}},
  pages        = {{13413--13427}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto}}},
  doi          = {{10.1109/tpel.2022.3180758}},
  volume       = {{37}},
  year         = {{2022}},
}

@article{33724,
  author       = {{Vieth, Pascal and Borgert, Thomas and Homberg, Werner and Grundmeier, Guido}},
  issn         = {{1438-1656}},
  journal      = {{Advanced Engineering Materials}},
  keywords     = {{Condensed Matter Physics, General Materials Science}},
  publisher    = {{Wiley}},
  title        = {{{Assessment of mechanical and optical properties of Al 6060 alloy particles by removal of contaminants}}},
  doi          = {{10.1002/adem.202201081}},
  year         = {{2022}},
}

@book{44199,
  author       = {{Chudalla, Nick and Meschut, Gerson and Teutenberg, Dominik and Wibbeke, Michael and Bartley, Aurélie}},
  isbn         = {{978-3-96780-135-4}},
  publisher    = {{Forschungsvereinigung Stahlanwendung e. V.}},
  title        = {{{Analyse des Versagensverhaltens geklebter Stahl- Verbindungen beim werkstoffschonenden Entfügen in der Karosserieinstandsetzung}}},
  year         = {{2022}},
}

@inproceedings{34096,
  author       = {{Gräßler, Iris and Roesmann, Daniel and Hillebrand, Stefan and Pottebaum, Jens}},
  booktitle    = {{Procedia CIRP ICME}},
  issn         = {{2212-8271}},
  keywords     = {{General Medicine}},
  location     = {{Gulf of Naples}},
  pages        = {{489--494}},
  publisher    = {{Elsevier BV}},
  title        = {{{Information Model for Hybrid Prototyping in Design Reviews of Assembly Stations}}},
  doi          = {{10.1016/j.procir.2022.09.054}},
  volume       = {{112}},
  year         = {{2022}},
}

@book{44209,
  author       = {{Schmolke, Tobias and Meschut, Gerson and Vieth, Pascal and Meinderink, Dennis and Grundmeier, Guido}},
  publisher    = {{Forschungsvereinigung Stahlanwendung e. V.}},
  title        = {{{Entwicklung einer Methode zur Bewertung einer stahlintensiven Mischbau-Klebverbindung eines  Batteriegehäuses gegenüber mechanischer und medialer Belastung unter Berücksichtigung der Interphasenstruktur }}},
  year         = {{2022}},
}

@book{44213,
  author       = {{Göddecke, Johannes and Meschut, Gerson and Kötz, Fabian and Matzenmiller, Anton and Damm, Jannis and Albiez, Matthias and Ummenhofer, Thomas}},
  isbn         = {{978-3-96780-137-8}},
  pages        = {{404}},
  publisher    = {{Forschungsvereinigung Stahlanwendung e.V.}},
  title        = {{{Experimentelle und numerische Untersuchung der Dämpfungseigenschaften  geklebter Strukturen unter dynamischer  Beanspruchung}}},
  year         = {{2022}},
}

@article{34228,
  author       = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Inguva, Venkatesh and Kenig, Eugeny Y.}},
  isbn         = {{978-88-95608-95-2}},
  issn         = {{2283-9216}},
  journal      = {{Chemical Engineering Transactions}},
  location     = {{Mailand, Italien}},
  pages        = {{175--180}},
  title        = {{{A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids}}},
  doi          = {{10.3303/CET2296030}},
  volume       = {{96}},
  year         = {{2022}},
}

@inproceedings{33485,
  author       = {{Dechert, Christopher and Kenig, Eugeny}},
  booktitle    = {{Proceedings of the 12th international conference Distillation & Absorption 2022}},
  location     = {{Toulouse, France}},
  title        = {{{CFD-Based Investigation of the Packing Microstructure Influence on Droplet Behavior and Film Flow}}},
  year         = {{2022}},
}

@inproceedings{31223,
  author       = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Kenig, Eugeny}},
  booktitle    = {{Heat Powered Cycles Conference 2022}},
  location     = {{Bilbao, Spain}},
  title        = {{{On Heat Regeneration Limitations in Heat Engines With Dense Working Fluids}}},
  year         = {{2022}},
}

@article{34216,
  abstract     = {{Mechanical joining technologies are increasingly used in multi-material lightweight constructions and offer opportunities to create versatile joining processes due to their low heat input, robustness to metallurgical incompatibilities and various process variants. They can be categorised into technologies which require an auxiliary joining element, or do not require an auxiliary joining element. A typical example for a mechanical joining process with auxiliary joining element is self-piercing riveting. A wide range of processes exist which are not requiring an auxiliary joining element. This allows both point-shaped (e.g., by clinching) and line-shaped (e.g., friction stir welding) joints to be produced. In order to achieve versatile processes, challenges exist in particular in the creation of intervention possibilities in the process and the understanding and handling of materials that are difficult to join, such as fiber reinforced plastics (FRP) or high-strength metals. In addition, predictive capability is required, which in particular requires accurate process simulation. Finally, the processes must be measured non-destructively in order to generate control variables in the process or to investigate the cause-effect relationship. This paper covers the state of the art in scientific research concerning mechanical joining and discusses future challenges on the way to versatile mechanical joining processes.}},
  author       = {{Meschut, Gerson and Merklein, M. and Brosius, A. and Drummer, D. and Fratini, L. and Füssel, U. and Gude, M. and Homberg, Werner and Martins, P.A.F. and Bobbert, Mathias and Lechner, M. and Kupfer, R. and Gröger, B. and Han, Daxin and Kalich, J. and Kappe, Fabian and Kleffel, T. and Köhler, D. and Kuball, C.-M. and Popp, J. and Römisch, D. and Troschitz, J. and Wischer, Christian and Wituschek, S. and Wolf, M.}},
  issn         = {{2666-3309}},
  journal      = {{Journal of Advanced Joining Processes}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
  publisher    = {{Elsevier BV}},
  title        = {{{Review on mechanical joining by plastic deformation}}},
  doi          = {{10.1016/j.jajp.2022.100113}},
  volume       = {{5}},
  year         = {{2022}},
}

@article{43433,
  abstract     = {{Ziel dieser Studie ist es den digitalen moodlegestützten asynchronen Sprachkurs Fachspezifisches Chinesisch für das „Maschinenbau in China Programm“ (mb-cn) der Fakultät für Maschinenbau der Universität Paderborn zu evaluieren, um Handlungsempfehlungen für zukünftig ähnlich aufgebaute Projekte zu entwickeln. Dazu wurden im Sommersemester 2021 sechs leitfadengestützte Interviews geführt. Die Interviews wurden anschließend mithilfe von deduktiv ermittelten Kategorien, die sich aus dem Technology Acceptance Model 2 (TAM2) nach Venkatesh und Davis (2000) ergaben, nach Mayring (2015) analysiert, um abschließend die Forschungsfrage zu beantworten: „Wie bewerten mb-cn Ingenieurstudierende die wahrgenommene Nützlichkeit der digitalen Sprachlernangebote des Kurses Fachspezifisches Chinesisch?“.}},
  author       = {{Hambach, Dennis}},
  journal      = {{ die hochschullehre. Interdisziplinäre Zeitschrift für Hochschule und Lehre}},
  keywords     = {{Technology Acceptance Model, Fachspezifische Chinesischsprachkurse, digitale Lehre, Moodle, Evaluation}},
  number       = {{8}},
  pages        = {{1--15}},
  publisher    = {{wbv Publikation}},
  title        = {{{Evaluation eines digitalen Fachspezifischen Chinesischsprachkurses für Studierende des Ingenieurwesens}}},
  doi          = {{10.3278/HSL2249W}},
  year         = {{2022}},
}

@article{34243,
  abstract     = {{<jats:p> In view of economic and ecological trends, the concepts for lightweight construction in transport systems are becoming increasingly important. These are frequently applied in the form of multi-material systems, which are characterized by the selective use of materials and geometries. One major challenge in the manufacturing of multi-material systems is the joining of the individual components to form a complete system. Mechanical joining processes such as semi-tubular self-piercing riveting are frequently used for this application but reach their limits concerning the number of combinations of geometry and material. In order to react to the requirements and to increase the versatility of semi-tubular self-pierce riveting, a process combination consisting of a tumbling process and a self-pierce riveting process has been presented previously. This process combination is used in this work to investigate the versatility and to identify the influencing parameters on it. For this purpose, experiments are conducted to identify process-side influence possibilities. The tests are performed with a dual-phase steel aluminum alloy to represent the varying mechanical characteristics of multi-material systems. Furthermore, the initial sheet thicknesses of the joining partners are varied in several steps. In addition to the geometric joint formation used to describe the undercut, the rivet head end position and the residual sheet thickness, the joining process, is also analyzed during the investigations. Further, the innovative joining process is evaluated by comparing it with a conventional self-piercing riveting process. The knowledge obtained represents a basis for the identification and evaluation of the versatility of the process combination. </jats:p>}},
  author       = {{Wituschek, Simon and Kappe, Fabian and Meschut, Gerson and Lechner, Michael}},
  issn         = {{1464-4207}},
  journal      = {{Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}},
  keywords     = {{Mechanical Engineering, General Materials Science}},
  publisher    = {{SAGE Publications}},
  title        = {{{Geometric and mechanical joint characterization of conventionally  and tumbled self-piercing riveting joints}}},
  doi          = {{10.1177/14644207221135400}},
  year         = {{2022}},
}

@article{29891,
  author       = {{Gräßler, Iris and Preuß, Daniel and Pottebaum, Jens}},
  issn         = {{0720-8928}},
  journal      = {{Softwaretechnik-Trends}},
  number       = {{1}},
  pages        = {{15--16}},
  publisher    = {{Köllen Druck & Verlag GmbH}},
  title        = {{{Extrahierung von Anforderungen aus natürlich-sprachlichen Lastenheften: Was erschwert eine KI-basierte Extrahierung?}}},
  volume       = {{42}},
  year         = {{2022}},
}

@article{29719,
  author       = {{Borgert, Thomas and Homberg, Werner}},
  issn         = {{2352-4847}},
  journal      = {{Energy Reports}},
  keywords     = {{General Energy}},
  pages        = {{399--404}},
  publisher    = {{Elsevier BV}},
  title        = {{{Energy saving potentials of an efficient recycling process of different aluminum rejects}}},
  doi          = {{10.1016/j.egyr.2022.01.027}},
  volume       = {{8}},
  year         = {{2022}},
}

@article{32275,
  author       = {{Meschut, G. and Merklein, M. and Brosius, A. and Drummer, D. and Fratini, L. and Füssel, U. and Gude, M. and Homberg, W. and Martins, P.A.F. and Bobbert, M. and Lechner, M. and Kupfer, R. and Gröger, B. and Han, D. and Kalich, J. and Kappe, F. and Kleffel, T. and Köhler, D. and Kuball, C.-M. and Popp, J. and Römisch, D. and Troschitz, J. and Wischer, C. and Wituschek, S. and Wolf, M.}},
  issn         = {{2666-3309}},
  journal      = {{Journal of Advanced Joining Processes}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
  publisher    = {{Elsevier BV}},
  title        = {{{Review on mechanical joining by plastic deformation}}},
  doi          = {{10.1016/j.jajp.2022.100113}},
  volume       = {{5}},
  year         = {{2022}},
}

@article{34242,
  author       = {{Neuser, Moritz and Kappe, Fabian and Ostermeier, Jakob and Krüger, Jan Tobias and Bobbert, Mathias and Meschut, Gerson and Schaper, Mirko and Grydin, Olexandr}},
  issn         = {{1438-1656}},
  journal      = {{Advanced Engineering Materials}},
  keywords     = {{Condensed Matter Physics, General Materials Science}},
  number       = {{10}},
  publisher    = {{Wiley}},
  title        = {{{Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting}}},
  doi          = {{10.1002/adem.202200874}},
  volume       = {{24}},
  year         = {{2022}},
}

@inproceedings{30292,
  abstract     = {{The spinning process is a flexible incremental forming process for the manufacturing of axially-symmetric sheet metal or tubular components with functionally graded properties. It is characterized by the utilization of universal tooling geometries and quite low forming forces. The process has a high potential to reduce material waste, to extend the forming limits and to achieve more complex geometries as well as favorable part properties [1]. Current research work at the Chair of Forming Technology (LUF) is focused on innovative flow-turning processes that have a high potential for producing flat components with excellent geometrical and mechanical properties while keeping process times short [2]. In combination with process-integrated local heat treatment, the new spinning process is predestined for the efficient forming of ultra-high-strength steel or tailored materials. Due to the desired field of food industry only food-safe materials such as special stainless steels are being investigated. This paper presents an innovative machine layout as well as an adequate process design for the production of high-performance circular knives with optimized mechanical hardness. In this context, particular attention is paid to various areas of temperature control as well as process-related challenges during the process.}},
  author       = {{Engemann, David and Homberg, Werner}},
  keywords     = {{Cutting blades, Flow-forming, Incremental forming, Hot Forming, High strength steels}},
  location     = {{Braga - Portugal}},
  title        = {{{Hot Spinning of Cutting Blades for Food Industry}}},
  year         = {{2022}},
}