@article{53084, abstract = {{AbstractThe thermal decomposition of Zr(acac)4 is studied in a SiC-microreactor on the micro-second time scale. By utilizing synchrotron radiation and photoelectron photoion coincidence spectroscopy, six important zirconium intermediates, as for instance Zr(C5H7O2)2(C5H6O2), and Zr(C5H6O2)2, are identified in the gas phase for the first time. The adiabatic ionization thresholds of intermediately formed zirconium species are estimated and the main products of their thermal decomposition, acetylacetone, acetylallene and acetone are characterized unambiguously and isomer-selectively. Based on all detected intermediates, we deduce the predominant pyrolysis pathways of the precursor in the temperature range from 400 to 900 K. Our findings are complemented by numerical simulations of the flow field in the microreactor, which show that the choice of dilution gas significantly influences the temperature profile and residence times in the microreactor, such that helium provides a more uniform flow field than argon and should preferentially be used. Graphical abstract Using a soft ionization method coupled to velocity map imaging (VMI), leads to valuable insights in the thermal decomposition of Zr(C5H7O2)4, used in the synthesis of functional nanomaterials and ceramic coatings. Thanks to the use of a microreactor, important gas}}, author = {{Grimm, Sebastian and Baik, Seung-Jin and Hemberger, Patrick and Kasper, Tina and Kempf, Andreas M. and Atakan, Burak}}, issn = {{0884-2914}}, journal = {{Journal of Materials Research}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, number = {{9}}, pages = {{1558--1575}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Insights into the decomposition of zirconium acetylacetonate using synchrotron radiation: Routes to the formation of volatile Zr-intermediates}}}, doi = {{10.1557/s43578-022-00566-6}}, volume = {{37}}, year = {{2022}}, } @article{53083, abstract = {{AbstractThe decomposition and reduction of ferrocene, an important precursor for iron chemical vapor deposition and catalyst for nanotube synthesis, is investigated in the gas‐phase. Reactive intermediates are detected to understand the underlying chemistry by using a microreactor coupled to a synchrotron light source. Utilizing soft photoionization coupled with photoelectron‐photoion coincidence detection enables us to characterize exclusive intermediates isomer‐selectively. A reaction mechanism for the ferrocene decomposition is proposed, which proceeds as a two‐step process. Initially, the molecule decomposes in a homogeneous surface reaction at temperatures <900 K, leading to products such as cyclopentadiene and cyclopentadienyl radicals that are immediately released to the gas‐phase. At higher temperatures, ferrocene rapidly decomposes in the gas‐phase, losing two cyclopentadienyl radicals in conjunction with iron. The addition of hydrogen to the reaction mixture reduces the decomposition temperature, and changes the branching ratio of the products. This change is mainly attributed to the H‐addition of cyclopentadienyl radicals on the surface, which leads to a release of cyclopentadiene into the gas‐phase. On the surface, ligand fragments may also undergo a series of catalytic H‐losses leading most probably to a high carbon content in the film. Finally, Arrhenius parameters for both global reactions are presented.}}, author = {{Grimm, Sebastian and Hemberger, Patrick and Kasper, Tina and Atakan, Burak}}, issn = {{2196-7350}}, journal = {{Advanced Materials Interfaces}}, keywords = {{Mechanical Engineering, Mechanics of Materials}}, number = {{22}}, publisher = {{Wiley}}, title = {{{Mechanism and Kinetics of the Thermal Decomposition of Fe(C5H5)2 in Inert and Reductive Atmosphere: A Synchrotron‐Assisted Investigation in A Microreactor}}}, doi = {{10.1002/admi.202200192}}, volume = {{9}}, year = {{2022}}, } @inproceedings{52851, abstract = {{We report on our work with students in our data science courses, focusing on the analysis of students’ results. This study represents an in-depth analysis of students’ creation and documentation of machine learning models. The students were supported by educationally designed Jupyter Notebooks, which are used as worked examples. Using the worked example, students document their results in a so-called computational essay. We examine which aspects of creating computational essays are difficult for students to find out how worked examples should be designed to support students without being too prescriptive. We analyze the computational essays produced by students and draw consequences for redesigning our worked example.}}, author = {{Fleischer, Yannik and Hüsing, Sven and Biehler, Rolf and Podworny, Susanne and Schulte, Carsten}}, booktitle = {{Bridging the Gap: Empowering and Educating Today’s Learners in Statistics. Proceedings of the Eleventh International Conference on Teaching Statistics}}, publisher = {{International Association for Statistical Education}}, title = {{{Jupyter Notebooks for Teaching, Learning, and Doing Data Science}}}, doi = {{10.52041/iase.icots11.t10e3}}, year = {{2022}}, } @article{47552, author = {{Herrmann, Felix and Grünewald, Marcus and Riese, Julia}}, issn = {{0360-3199}}, journal = {{International Journal of Hydrogen Energy}}, keywords = {{Energy Engineering and Power Technology, Condensed Matter Physics, Fuel Technology, Renewable Energy, Sustainability and the Environment}}, number = {{25}}, pages = {{9377--9389}}, publisher = {{Elsevier BV}}, title = {{{Model-based design of a segmented reactor for the flexible operation of the methanation of CO2}}}, doi = {{10.1016/j.ijhydene.2022.12.122}}, volume = {{48}}, year = {{2022}}, } @article{47554, author = {{Lilli, Lilli and Röder, Lilli and Gröngröft, Arne and Grünewald, Marcus and Riese, Julia}}, journal = {{Energy Proceedings}}, publisher = {{Applied Energy Innovation Institute (AEii)}}, title = {{{Demand Side Management in Biogas Plants - Dynamic Simulation of the Influence of Time-varying Agitation on Biogas Production}}}, year = {{2022}}, } @inproceedings{53115, author = {{Schneider, Tamara and Weber, Julia and Bauer, Nicola H.}}, location = {{Winterthur (Schweiz)}}, title = {{{"Schwangerschaft ressourcenorientiert erleben" (SRE-Studie) - Das Zürcher Ressourcen Modell (ZRM) als Intervention zur Stressreduktion in der Geburtsvorbereitung. }}}, year = {{2022}}, } @inproceedings{53111, author = {{Schneider, Tamara and Klingsieck, Katrin B.}}, location = {{Hochschule Hannover}}, title = {{{"ProGRess" - Prokrastination reduzieren und Gesundheit fördern. }}}, year = {{2022}}, } @inproceedings{53112, author = {{Schneider, Tamara and Weber, Julia and Bauer, Nicola H.}}, title = {{{"Schwangerschaft ressourcenorientiert erleben" (SRE-Studie) - Stressreduktion in der Schwangerschaft mit dem Zürcher Ressourcen Modell (ZRM).}}}, year = {{2022}}, } @inproceedings{53110, author = {{Schneider, Tamara and Klingsieck, Katrin B.}}, location = {{Mainz}}, title = {{{"ProGRess" - Prokrastination ressourcenstark und gesundheitsfördernd begegnen. }}}, year = {{2022}}, } @inproceedings{53118, author = {{Schneider, Tamara and Klingsieck, Katrin B.}}, location = {{Osnabrück}}, title = {{{"ProGRess" - Ressourcen gegen Prokrastination aktivieren und Gesundheit fördern. }}}, year = {{2022}}, } @phdthesis{52669, author = {{Javed, A. R.}}, isbn = {{978-3-947647-26-2}}, title = {{{Mixed-Signal Baseband Circuit Design for High Data Rate Wireless Communication in Bulk CMOS and SiGe BiCMOS Technologies}}}, volume = {{Band 407}}, year = {{2022}}, } @phdthesis{52668, author = {{Fechtelpeter, Christian}}, isbn = {{978-3-947647-24-8}}, title = {{{Rahmenwerk zur Gestaltung des Technologietransfers in mittelständisch geprägten Innovationsclustern}}}, volume = {{Band 405}}, year = {{2022}}, } @inbook{53129, author = {{Altun, Tülay and Günther, Katrin and Markus, Bernhardt}}, booktitle = {{Fachorientierte Sprachbildung und sprachliche Vielfalt in der Lehrkräftebildung: Hochschuldidaktische Formate an der Universität Duisburg-Essen}}, editor = {{Katja F., Cantone and Erkan, Gürsoy and Ina, Lammers and Heike, Roll}}, publisher = {{Waxmann}}, title = {{{Inklusion und Sprachbildung: „Das habe ich noch nie vorher versucht, also bin ich völlig sicher, dass ich es schaffe“ : Eine interdisziplinäre Perspektive auf den Geschichtsunterricht}}}, volume = {{1}}, year = {{2022}}, } @inproceedings{32572, author = {{Mayer, Peter and Poddebniak, Damian and Fischer, Konstantin and Brinkmann, Marcus and Somorovsky, Juraj and Sasse, Angela and Schinzel, Sebastian and Volkamer, Melanie}}, booktitle = {{Eighteenth Symposium on Usable Privacy and Security (SOUPS 2022)}}, isbn = {{978-1-939133-30-4}}, pages = {{77–96}}, publisher = {{USENIX Association}}, title = {{{"I don' know why I check this..." - Investigating Expert Users' Strategies to Detect Email Signature Spoofing Attacks}}}, year = {{2022}}, } @inproceedings{32573, author = {{Maehren, Marcel and Nieting, Philipp and Hebrok, Sven Niclas and Merget, Robert and Somorovsky, Juraj and Schwenk, Jörg}}, booktitle = {{31st USENIX Security Symposium (USENIX Security 22)}}, publisher = {{USENIX Association}}, title = {{{TLS-Anvil: Adapting Combinatorial Testing for TLS Libraries}}}, year = {{2022}}, } @inbook{52385, author = {{Büttner, Denise and Teichwart, Tatienne}}, booktitle = {{Fachorientierte Sprachbildung und sprachliche Vielfalt in der Lehrkräftebildung. Hochschuldidaktische Formate an der Universität Duisburg-Essen}}, editor = {{Cantone, Katja F. and Gürsoy, Erkan and Lammers, Ina and Roll, Heike}}, pages = {{259--278}}, publisher = {{Waxmann}}, title = {{{Reflektierendes Schreiben im Praxissemester. Eine Untersuchung studentischer Schreibprodukte im Kontext der Forschungswerkstätten „Sprachsensible Schulentwicklung“ im Masterstudiengang Bildungswissenschaften an der Universität Duisburg-Essen}}}, year = {{2022}}, } @inbook{52367, author = {{Büttner, Denise and Frank, Magnus and Geier, Thomas}}, booktitle = {{Lehren und Lernen in Differenzverhältnissen}}, editor = {{Akbaba, Yaliz and Buchner, Tobias and Heinemann, Alisha M.B. and Pokitsch, Doris and Nadja, Thomas}}, pages = {{111--134}}, publisher = {{Springer}}, title = {{{„Behinderung“ als Thema von Unterricht. Eine rekonstruktive Fallstudie zur (De-)Konstruktion von Dis*ability}}}, year = {{2022}}, } @article{52384, author = {{Frank, Magnus and Büttner, Denise}}, journal = {{MPZD}}, number = {{22}}, pages = {{68--84}}, title = {{{"Bei dir läuft" - Zur Rekonstruktion neuer Sprache in Diskursen migrationsmarkierten Sprachwandels}}}, volume = {{1}}, year = {{2022}}, } @article{45970, abstract = {{ We introduce a new phase field model for tumor growth where viscoelastic effects are taken into account. The model is derived from basic thermodynamical principles and consists of a convected Cahn–Hilliard equation with source terms for the tumor cells and a convected reaction–diffusion equation with boundary supply for the nutrient. Chemotactic terms, which are essential for the invasive behavior of tumors, are taken into account. The model is completed by a viscoelastic system consisting of the Navier–Stokes equation for the hydrodynamic quantities, and a general constitutive equation with stress relaxation for the left Cauchy–Green tensor associated with the elastic part of the total mechanical response of the viscoelastic material. For a specific choice of the elastic energy density and with an additional dissipative term accounting for stress diffusion, we prove existence of global-in-time weak solutions of the viscoelastic model for tumor growth in two space dimensions [Formula: see text] by the passage to the limit in a fully-discrete finite element scheme where a CFL condition, i.e. [Formula: see text], is required. Moreover, in arbitrary dimensions [Formula: see text], we show stability and existence of solutions for the fully-discrete finite element scheme, where positive definiteness of the discrete Cauchy–Green tensor is proved with a regularization technique that was first introduced by Barrett and Boyaval [Existence and approximation of a (regularized) Oldroyd-B model, Math. Models Methods Appl. Sci. 21 (2011) 1783–1837]. After that, we improve the regularity results in arbitrary dimensions [Formula: see text] and in two dimensions [Formula: see text], where a CFL condition is required. Then, in two dimensions [Formula: see text], we pass to the limit in the discretization parameters and show that subsequences of discrete solutions converge to a global-in-time weak solution. Finally, we present numerical results in two dimensions [Formula: see text]. }}, author = {{Garcke, Harald and Kovács, Balázs and Trautwein, Dennis}}, issn = {{0218-2025}}, journal = {{Mathematical Models and Methods in Applied Sciences}}, keywords = {{Applied Mathematics, Modeling and Simulation}}, number = {{13}}, pages = {{2673--2758}}, publisher = {{World Scientific Pub Co Pte Ltd}}, title = {{{Viscoelastic Cahn–Hilliard models for tumor growth}}}, doi = {{10.1142/s0218202522500634}}, volume = {{32}}, year = {{2022}}, } @article{45969, abstract = {{AbstractAn evolving surface finite element discretisation is analysed for the evolution of a closed two-dimensional surface governed by a system coupling a generalised forced mean curvature flow and a reaction–diffusion process on the surface, inspired by a gradient flow of a coupled energy. Two algorithms are proposed, both based on a system coupling the diffusion equation to evolution equations for geometric quantities in the velocity law for the surface. One of the numerical methods is proved to be convergent in the$$H^1$$H1norm with optimal-order for finite elements of degree at least two. We present numerical experiments illustrating the convergence behaviour and demonstrating the qualitative properties of the flow: preservation of mean convexity, loss of convexity, weak maximum principles, and the occurrence of self-intersections.}}, author = {{Elliott, Charles M. and Garcke, Harald and Kovács, Balázs}}, issn = {{0029-599X}}, journal = {{Numerische Mathematik}}, keywords = {{Applied Mathematics, Computational Mathematics}}, number = {{4}}, pages = {{873--925}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Numerical analysis for the interaction of mean curvature flow and diffusion on closed surfaces}}}, doi = {{10.1007/s00211-022-01301-3}}, volume = {{151}}, year = {{2022}}, }