@article{37960, author = {{Stadler, Bernhard M. and Wulf, Christoph and Werner, Thomas and Tin, Sergey and de Vries, Johannes G.}}, issn = {{2155-5435}}, journal = {{ACS Catalysis}}, keywords = {{T4, CSSD}}, number = {{9}}, pages = {{8012--8067}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Catalytic Approaches to Monomers for Polymers Based on Renewables}}}, doi = {{10.1021/acscatal.9b01665}}, volume = {{9}}, year = {{2019}}, } @article{37966, abstract = {{Abstract Numerous organic transformations are based on the use of stoichiometric amounts of phosphorus reagents. The formation of phosphane oxides from phosphanes is usually the thermodynamic driving force for these reactions. The stoichiometric amounts of phosphane oxide which are formed as by-products often significantly hamper the product purification. Organophosphorus catalysis based on P(III)/P(V) redox cycling aims to address these problems. Herein we present our recent advances in developing catalytic Wittig-type reactions. More specifically, we reported our results on catalytic Wittig reactions based on readily available Bu3P=O as pre-catalyst as well as the first microwave-assisted version of this reaction and the first enantioselective catalytic Wittig reaction utilizing chiral phosphane catalysts. Further developments led to the implementation of catalytic base-free Wittig reactions yielding highly functionalized alkylidene and arylidene succinates.}}, author = {{Longwitz, Lars and Werner, Thomas}}, issn = {{1365-3075}}, journal = {{Pure and Applied Chemistry}}, keywords = {{T2, CSSD}}, number = {{1}}, pages = {{95--102}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Recent advances in catalytic Wittig-type reactions based on P(III)/P(V) redox cycling}}}, doi = {{10.1515/pac-2018-0920}}, volume = {{91}}, year = {{2019}}, } @article{37965, author = {{Grandane, Aiga and Longwitz, Lars and Roolf, Catrin and Spannenberg, Anke and Murua Escobar, Hugo and Junghanss, Christian and Suna, Edgars and Werner, Thomas}}, issn = {{0022-3263}}, journal = {{The Journal of Organic Chemistry}}, keywords = {{T2, T4, CSSD}}, number = {{3}}, pages = {{1320--1329}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Intramolecular Base-Free Catalytic Wittig Reaction: Synthesis of Benzoxepinones}}}, doi = {{10.1021/acs.joc.8b02789}}, volume = {{84}}, year = {{2019}}, } @article{2727, author = {{Gries, Thomas and Redlin, Margarete}}, issn = {{1024-2694}}, journal = {{Defence and Peace Economics}}, number = {{3}}, pages = {{309--323}}, publisher = {{Informa UK Limited}}, title = {{{Pirates – The Young and the Jobless: The Effect of Youth Bulges and Youth Labor Market Integration on Maritime Piracy}}}, doi = {{10.1080/10242694.2017.1333797}}, volume = {{30}}, year = {{2019}}, } @article{10090, author = {{Gries, Thomas}}, issn = {{0569-4345}}, journal = {{The American Economist}}, title = {{{A New Theory of Demand-Restricted Growth: The Basic Idea}}}, doi = {{10.1177/0569434519846477}}, year = {{2019}}, } @article{47478, abstract = {{The article discusses possibilities and specific problems of including audio material in the realm of scholarly music editions. From this perspective, the authors propose to include the sounding manifestation of music both into the notion of the musical ‚work‘ and of the musical ‚text‘. The outcome of this thought experiment which considers music as performative art, Beethoven’s and other classical composers’ own wider notions of musical works as musical practice, phonographic recordings as text, different types of music as different types of data, programmed concordances as specific feature of digital editions, and musical interpreters as authors of musical interpretations is a theoretical model that for the first time makes record productions the object of scholarly critical edition.}}, author = {{Münzmay, Andreas and Siegert, Christine}}, issn = {{0931-3079}}, journal = {{Editio: Internationales Jahrbuch für Editionswissenschaft}}, keywords = {{Musikedition, Interpretatsionsforschung, Clifford Curzon}}, number = {{1}}, pages = {{10--30}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Phonographischer Text, Interpretation und Aufführungsmaterial als kritisch edierbarer Sachzusammenhang. Ein Beitrag zur Theorie der Edition von Klangdokumenten}}}, doi = {{10.1515/editio-2019-0002}}, volume = {{33}}, year = {{2019}}, } @book{49450, editor = {{Staffel, Florian and Fäßler, Peter and Neuwöhner, Andreas }}, title = {{{Briten in Westfalen. Besatzer, Verbündete, Freunde?}}}, doi = {{ 10.15463/rec.1098248118}}, year = {{2019}}, } @inbook{62712, author = {{Opel, Simone and Schlichtig, Michael and Schulte, Carsten and Biehler, Rolf and Frischemeier, Daniel and Podworny, Susanne and Wassong, Thomas}}, booktitle = {{Informatik für alle - 18. GI-Fachtagung Informatik und Schule, 16.-18. September 2019, Dortmund}}, editor = {{Pasternak, A.}}, isbn = {{978-3-88579-682-4}}, pages = {{285–294}}, publisher = {{Gesellschaft für Informatik}}, title = {{{Entwicklung und Reflexion einer Unterrichtssequenz zum Maschinellen Lernen als Aspekt von Data Science in der Sekundarstufe II}}}, doi = {{10.18420/infos2019-c14}}, year = {{2019}}, } @inproceedings{45469, author = {{Schröder, Jan and Vogelsang, Christoph and Riese, Josef}}, booktitle = {{E-Book Proceedings of the ESERA 2019 Conference: The beauty and pleasure of understanding: engaging with contemporary challenges through science education}}, editor = {{Levrini, Olivia and Tasquier, Giulia}}, pages = {{1477--1485}}, title = {{{Assessing Student Teachers‘ Skills to plan Physics Lessons}}}, volume = {{13}}, year = {{2019}}, } @article{45194, abstract = {{Angehende Physiklehrkräfte sollen im Rahmen ihres Studiums fachliches und fachdidaktisches Wissen erwerben, welches die Gestaltung lernförderlichen Unterrichts ermöglicht. Es ist allerdings empirisch nur wenig geklärt, wie sich dieses Wissen im Laufe des Studiums entwickelt und ob es zur Ausbildung von Handlungsfähigkeiten beiträgt. Um derartige Wirkungsaussagen treffen zu können, müssen Instrumente entwickelt werden, die eine valide Testwertinterpretation zulassen. In diesem Beitrag werden auf Basis von im Projekt Profile-P+ entwickelten Instrumenten Validitätsanalysen zur längsschnittlichen Entwicklung des Professionswissens von Physiklehramtsstudierenden im Verlauf des Bachelorstudiums und ihrer Fähigkeiten zur Planung und Reflexion von Physikunterricht sowie zum Erklären von physikalischen Sachverhalten vor und nach dem Praxissemester dargestellt. Neben Wissenstests kamen standardisierte Performanztests zum Einsatz. Die vorliegenden Ergebnisse sprechen dafür, dass die erhobenen Messwerte im Sinne von Wirkungsaussagen interpretiert werden können. (DIPF/Orig.)}}, author = {{Vogelsang, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Kulgemeyer, Christoph and Reinhold, Peter and Riese, Josef and Schecker, Horst and Schröder, Jan}}, journal = {{Zeitschrift für Pädagogik}}, number = {{4}}, pages = {{473--491}}, publisher = {{Beltz}}, title = {{{Entwicklung von Professionswissen und Unterrichtsperformanz im Lehramtsstudium Physik. Analysen zu valider Testwertinterpretation}}}, doi = {{10.25656/01:23990}}, volume = {{65}}, year = {{2019}}, } @inbook{45471, author = {{Vogelsang, Christoph and Borowski, Andreas and Kulgemeyer, Christoph and Riese, Josef and Reinhold, Peter and Schecker, Horst and Buschütter, David and Enkrott, Patrick and Kempin, Maren and Schröder, Jan}}, booktitle = {{Student Learning Outcomes Assessment in Higher Education – Perspectives, Concepts and Approaches for Research, Transfer and Implementation (KoKoHs Working Papers, 12)}}, editor = {{Zlatkin-Troitschanskaia, Olga and Toepper, Miriam and Pant, Hans Anand and Lautenbach, Corinna and Kuhn, Christiane}}, pages = {{40--43}}, title = {{{Performance-Oriented Testing and Training in Teacher Education}}}, year = {{2019}}, } @inproceedings{45478, author = {{Vogelsang, Christoph and Riese, Josef and Borowski, Andreas and Kulgemeyer, Christoph}}, booktitle = {{Naturwissenschaftliche Bildung als Grundlage für berufliche und gesellschaftliche Teilhabe. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Kiel 2018}}, editor = {{Maurer, Christian}}, pages = {{345--348}}, title = {{{Profile-P+: Kompetenz und Performanz im Lehramtsstudium Physik}}}, volume = {{39}}, year = {{2019}}, } @inproceedings{45477, author = {{Schröder, Jan and Vogelsang, Christoph and Riese, Josef}}, booktitle = {{Naturwissenschaftliche Bildung als Grundlage für berufliche und gesellschaftliche Teilhabe. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Kiel 2018}}, editor = {{Maurer, Christian}}, pages = {{353--356}}, title = {{{Erfassung der Fähigkeit zur Unterrichtsplanung im Physikunterricht}}}, volume = {{39}}, year = {{2019}}, } @article{62775, author = {{Schowtjak, Alexander and Wang, Shuhan and Hering, Oliver and Clausmeyer, Till and Lohmar, Johannes and Schulte, Robin and Ostwald, Richard and Hirt, Gerhard and Tekkaya, A. Erman}}, issn = {{0944-6524}}, journal = {{Production Engineering}}, number = {{1}}, pages = {{33--41}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Prediction and analysis of damage evolution during caliber rolling and subsequent cold forward extrusion}}}, doi = {{10.1007/s11740-019-00935-x}}, volume = {{14}}, year = {{2019}}, } @article{62779, author = {{Ostwald, Richard and Kuhl, Ellen and Menzel, Andreas}}, issn = {{0178-7675}}, journal = {{Computational Mechanics}}, number = {{3}}, pages = {{847--877}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{On the implementation of finite deformation gradient-enhanced damage models}}}, doi = {{10.1007/s00466-019-01684-5}}, volume = {{64}}, year = {{2019}}, } @inproceedings{23756, abstract = {{Creativity is perceived to be one of the core competences to succeed in the modern world. It is connected to art, music, dancing, etc., but there is just little insight into the role of creativity in science. As data analysis plays a major role in science, creative thinking has to be used to form theories out of observations. This study uses models-of-data to represent the mental model of the students. Within models-of-data different observations and previous knowledge are linked through different types of links, e.g. causal links. The goal of this study was to examine the creative aspect of data evaluation in presence of anomalous data. The students were confronted with two experiments which contradicted each other with regard to the underlying theory. Afterwards the students were asked to decide about their favored theory and reasoning about their choice in their lab reports. The model-of-data, which was reconstructed from the lab reports of the students, was used to extract creative aspects in the mental modelling process. Furthermore, a pre-post-questionnaire on epistemological beliefs of the students was conducted. Students mostly acquired an unscientific view on epistemology in school. The question was whether the confrontation with anomalous data and the triggering of creative modelling processes have any influence on this. The results show that most students did not take anomalous data into account in their modelling processes. They did either not recognise or just ignore the data. Just a few students worked on their theory because of the new, contradictory data. The students working on their theory scored higher in the post-questionnaire, so a positive effect of creativity on scientific epistemology can be assumed. Thus, creativity obviously gets a part of science and should be taught in school science in order to make students aware of their own creative potential.}}, author = {{Pollmeier, Pascal and Fechner, Sabine}}, booktitle = {{The beauty and pleasure of understanding: engaging with contemporary challenges through science education. Electronic Proceedings of the ESERA 2019 Conference. }}, editor = {{Levrini, Olivia and Tasquir, Giulia and Kaya, Ebru and Vesterinen, Veli-Matti}}, keywords = {{epistemology, conceptual change, anomalous data}}, location = {{Bologna}}, pages = {{751--759}}, publisher = {{ALMA MATER STUDIORUM - University of Bologna}}, title = {{{Creativity in data analysis through confrontation with anomalous data}}}, year = {{2019}}, } @article{20578, author = {{Driben, R and Ma, Xuekai and Schumacher, Stefan and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{6}}, pages = {{1327--1330}}, title = {{{Bloch oscillations of multidimensional dark soliton wave packets and light bullets}}}, doi = {{10.1364/ol.44.001327}}, volume = {{44}}, year = {{2019}}, } @article{15851, author = {{Ma, Xuekai and Kartashov, Yaroslav Y and Gao, Tingge and Schumacher, Stefan}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, title = {{{Controllable high-speed polariton waves in a PT-symmetric lattice}}}, doi = {{10.1088/1367-2630/ab5a9b}}, volume = {{21}}, year = {{2019}}, } @unpublished{13340, abstract = {{Spontaneous formation of transverse patterns is ubiquitous in nonlinear dynamical systems of all kinds. An aspect of particular interest is the active control of such patterns. In nonlinear optical systems this can be used for all-optical switching with transistor-like performance, for example realized with polaritons in a planar quantum-well semiconductor microcavity. Here we focus on a specific configuration which takes advantage of the intricate polarization dependencies in the interacting optically driven polariton system. Besides detailed numerical simulations of the coupled light-field exciton dynamics, in the present paper we focus on the derivation of a simplified population competition model giving detailed insight into the underlying mechanisms from a nonlinear dynamical systems perspective. We show that such a model takes the form of a generalized Lotka-Volterra system for two competing populations explicitly including a source term that enables external control. We present a comprehensive analysis both of the existence and stability of stationary states in the parameter space spanned by spatial anisotropy and external control strength. We also construct phase boundaries in non-trivial regions and characterize emerging bifurcations. The population competition model reproduces all key features of the switching observed in full numerical simulations of the rather complex semiconductor system and at the same time is simple enough for a fully analytical understanding of the system dynamics.}}, author = {{Pukrop, Matthias and Schumacher, Stefan}}, booktitle = {{arXiv:1903.12534}}, title = {{{Externally Controlled Lotka-Volterra Dynamics in a Linearly Polarized Polariton Fluid}}}, year = {{2019}}, } @unpublished{13347, abstract = {{<div> <div> <div> <p>Molecular doping in conjugated polymers is a crucial process for their application in organic photovoltaics and optoelectronics. In the present work we theoretically investigate p-type molecu- lar doping in a series of (poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b”]dithiophene)-alt- 4,7-(2,1,3-benzothiadiazole)] (PCPDT-BT) conjugated oligomers with different lengths and three widely-used dopants with different electron affinities, namely F4TCNQ, F6TCNNQ, and CN6-CP. We study in detail the molecular geometry of possible oligomer-dopant complexes and its influence on the doping mechanisms and electronic system properties. We find that the mechanisms of dop- ing and charge transfer observed sensitively depend on the specific geometry of the oligomer-dopant complexes. For a given complex different geometries may exist, some of which show transfer of an entire electron from the oligomer chain onto the dopant molecule resulting in an integer-charge transfer complex, leaving the system in a ground state with broken spin symmetry. In other ge- ometries merely hybridization of oligomer and dopant frontier orbitals occurs with partial charge transfer but spin-symmetric ground state. Considering the resulting electronic density of states both cases may well contribute to an increased electrical conductivity of corresponding film samples while the underlying physical mechanisms are entirely different. </p> </div> </div> </div>}}, author = {{Dong, Chuan-Ding and Schumacher, Stefan}}, title = {{{Molecular Doping of PCPDT-BT Copolymers: Comparison of Molecular Complexes with and Without Integer Charge Transfer}}}, year = {{2019}}, }