@article{62801,
  abstract     = {{The three-dimensional (3D) distribution of individual atoms on the surface of catalyst nanoparticles plays a vital role in their activity and stability. Optimising the performance of electrocatalysts requires atomic-scale information, but it is difficult to obtain. Here, we use atom probe tomography to elucidate the 3D structure of 10 nm sized Co2FeO4 and CoFe2O4 nanoparticles during oxygen evolution reaction (OER). We reveal nanoscale spinodal decomposition in pristine Co2FeO4. The interfaces of Co-rich and Fe-rich nanodomains of Co2FeO4 become trapping sites for hydroxyl groups, contributing to a higher OER activity compared to that of CoFe2O4. However, the activity of Co2FeO4 drops considerably due to concurrent irreversible transformation towards CoIVO2 and pronounced Fe dissolution. In contrast, there is negligible elemental redistribution for CoFe2O4 after OER, except for surface structural transformation towards (FeIII, CoIII)2O3. Overall, our study provides a unique 3D compositional distribution of mixed Co-Fe spinel oxides, which gives atomic-scale insights into active sites and the deactivation of electrocatalysts during OER.}},
  author       = {{Xiang, Weikai and Yang, Nating and Li, Xiaopeng and Linnemann, Julia and Hagemann, Ulrich and Ruediger, Olaf and Heidelmann, Markus and Falk, Tobias and Aramini, Matteo and DeBeer, Serena and Muhler, Martin and Tschulik, Kristina and Li, Tong}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{electrocatalysis, oxygen evolution reaction, cobalt spinel, electrochemical impedance spectroscopy}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction}}},
  doi          = {{10.1038/s41467-021-27788-2}},
  volume       = {{13}},
  year         = {{2022}},
}

@article{62813,
  abstract     = {{Nanostructured manganese oxides have a rich variety of morphologies and crystal phases which can undergo transformations during synthesis and application. Although these structural features are crucial for their performance, the mechanisms behind such transitions are not well understood. Herein, we describe the mechanism of transformation from layered 2D δ-MnO2 nanosheets to the scarcely reported γ-MnO2 nanocone morphology. Despite the common purpose of introducing Fe dopants to enhance the conductivity of layered manganese oxides, the Fe galvanic exchange reaction was found responsible for such coupled phase/morphology transition. Electrochemical characterization confirmed a distinct electrochemical behaviour of the nanocones, emphasizing the need to unravel the mechanism of 2D MnO2 transformation. Such mechanistic insights were gained by systematic and rigorous electron microscopy studies. The effect of the local chemical composition was determined by energy dispersive X-ray spectroscopy while electron energy loss spectroscopy unravelled the key influence of the oxidation state of Mn ions within nanosheets and nanocones. We propose and demonstrate a Mn2+-mediated oxidative mechanism of coupled morphology/phase transformation subjected to the equilibrium of Fe and Mn ions during galvanic exchange reaction. These findings contribute to the understanding of the growth and morphology/phase transformations of manganese oxide nanostructures, providing insights for the rational design of nanomaterials.}},
  author       = {{Aymerich-Armengol, Raquel and Cignoni, Paolo and Ebbinghaus, Petra and Linnemann, Julia and Rabe, Martin and Tschulik, Kristina and Scheu, Christina and Lim, Joohyun}},
  issn         = {{2050-7488}},
  journal      = {{Journal of Materials Chemistry A}},
  keywords     = {{manganese oxide, nanomaterials, TEM, supercapacitors}},
  number       = {{45}},
  pages        = {{24190--24198}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Mechanism of coupled phase/morphology transformation of 2D manganese oxides through Fe galvanic exchange reaction}}},
  doi          = {{10.1039/d2ta06552e}},
  volume       = {{10}},
  year         = {{2022}},
}

@article{30511,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Many critical codebases are written in C, and most of them use preprocessor directives to encode variability, effectively encoding software product lines. These preprocessor directives, however, challenge any static code analysis. SPLlift, a previously presented approach for analyzing software product lines, is limited to Java programs that use a rather simple feature encoding and to analysis problems with a finite and ideally small domain. Other approaches that allow the analysis of real-world C software product lines use special-purpose analyses, preventing the reuse of existing analysis infrastructures and ignoring the progress made by the static analysis community. This work presents <jats:sc>VarAlyzer</jats:sc>, a novel static analysis approach for software product lines. <jats:sc>VarAlyzer</jats:sc> first transforms preprocessor constructs to plain C while preserving their variability and semantics. It then solves any given distributive analysis problem on transformed product lines in a variability-aware manner. <jats:sc>VarAlyzer</jats:sc> ’s analysis results are annotated with feature constraints that encode in which configurations each result holds. Our experiments with 95 compilation units of OpenSSL show that applying <jats:sc>VarAlyzer</jats:sc> enables one to conduct inter-procedural, flow-, field- and context-sensitive data-flow analyses on entire product lines for the first time, outperforming the product-based approach for highly-configurable systems.</jats:p>}},
  author       = {{Schubert, Philipp and Gazzillo, Paul and Patterson, Zach and Braha, Julian and Schiebel, Fabian Benedikt and Hermann, Ben and Wei, Shiyi and Bodden, Eric}},
  issn         = {{0928-8910}},
  journal      = {{Automated Software Engineering}},
  keywords     = {{inter-procedural static analysis, software product lines, preprocessor, LLVM, C/C++}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Static data-flow analysis for software product lines in C}}},
  doi          = {{10.1007/s10515-022-00333-1}},
  volume       = {{29}},
  year         = {{2022}},
}

@inbook{62847,
  author       = {{Kirschtein, Claudia}},
  booktitle    = {{Wissenstransfer. Aufgabe, Herausforderung und Chance kulturwissenschaftlicher Forschung}},
  editor       = {{Harmening , Anda-Lisa and Leinfellner, Stefanie and Meier, Rebecca}},
  isbn         = {{978-3-534-27585-4}},
  pages        = {{149--172}},
  publisher    = {{wbg}},
  title        = {{{Die Rolle von Emotionen beim Wissenstransfer. Mediendidaktische Überlegungen zur Gestaltung von Online-Lehrangeboten in der Erwachsenenbildung}}},
  year         = {{2022}},
}

@article{34094,
  author       = {{Gao, Ying and Li, Yao and Ma, Xuekai and Gao, Meini and Dai, Haitao and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  keywords     = {{Physics and Astronomy (miscellaneous)}},
  number       = {{20}},
  publisher    = {{AIP Publishing}},
  title        = {{{Tilting nondispersive bands in an empty microcavity}}},
  doi          = {{10.1063/5.0093908}},
  volume       = {{121}},
  year         = {{2022}},
}

@article{31937,
  author       = {{Li, Yao and Ma, Xuekai and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  number       = {{6}},
  pages        = {{2079--2086}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Switching Off a Microcavity Polariton Condensate near the Exceptional Point}}},
  doi          = {{10.1021/acsphotonics.2c00288}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{37713,
  author       = {{Murzakhanov, Fadis F. and Mamin, Georgy Vladimirovich and Orlinskii, Sergei Borisovich and Gerstmann, Uwe and Schmidt, Wolf Gero and Biktagirov, Timur and Aharonovich, Igor and Gottscholl, Andreas and Sperlich, Andreas and Dyakonov, Vladimir and Soltamov, Victor A.}},
  issn         = {{1530-6984}},
  journal      = {{Nano Letters}},
  keywords     = {{Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering}},
  number       = {{7}},
  pages        = {{2718--2724}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized V<sub>B</sub><sup>–</sup> Spin States in hBN}}},
  doi          = {{10.1021/acs.nanolett.1c04610}},
  volume       = {{22}},
  year         = {{2022}},
}

@article{33080,
  author       = {{Long, Teng and Ma, Xuekai and Ren, Jiahuan and Li, Feng and Liao, Qing and Schumacher, Stefan and Malpuech, Guillaume and Solnyshkov, Dmitry and Fu, Hongbing}},
  issn         = {{2198-3844}},
  journal      = {{Advanced Science}},
  keywords     = {{General Physics and Astronomy, General Engineering, Biochemistry, Genetics and Molecular Biology (miscellaneous), General Materials Science, General Chemical Engineering, Medicine (miscellaneous)}},
  number       = {{29}},
  publisher    = {{Wiley}},
  title        = {{{Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity}}},
  doi          = {{10.1002/advs.202203588}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{32310,
  author       = {{Li, Yao and Ma, Xuekai and Zhai, Xiaokun and Gao, Meini and Dai, Haitao and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature}}},
  doi          = {{10.1038/s41467-022-31529-4}},
  volume       = {{13}},
  year         = {{2022}},
}

@article{32148,
  author       = {{Gao, Xinghui and Hu, Wei and Schumacher, Stefan and Ma, Xuekai}},
  issn         = {{0146-9592}},
  journal      = {{Optics Letters}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{13}},
  pages        = {{3235--3238}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Unidirectional vortex waveguides and multistable vortex pairs in polariton condensates}}},
  doi          = {{10.1364/ol.457724}},
  volume       = {{47}},
  year         = {{2022}},
}

@inbook{30288,
  abstract     = {{Lithium niobate (LiNbO3), a material frequently used in optical applications, hosts different kinds of polarons that significantly affect many of its physical properties. In this study, a variety of electron polarons, namely free, bound, and bipolarons, are analyzed using first-principles calculations. We perform a full structural optimization based on density-functional theory for selected intrinsic defects with special attention to the role of symmetry-breaking distortions that lower the total energy. The cations hosting the various polarons relax to a different degree, with a larger relaxation corresponding to a larger gap between the defect level and the conduction-band edge. The projected density of states reveals that the polaron states are formerly empty Nb 4d states lowered into the band gap. Optical absorption spectra are derived within the independent-particle approximation, corrected by the GW approximation that yields a wider band gap and by including excitonic effects within the Bethe-Salpeter equation. Comparing the calculated spectra with the density of states, we find that the defect peak observed in the optical absorption stems from transitions between the defect level and a continuum of empty Nb 4d states. Signatures of polarons are further analyzed in the reflectivity and other experimentally measurable optical coefficients.}},
  author       = {{Schmidt, Falko and Kozub, Agnieszka L. and Gerstmann, Uwe and Schmidt, Wolf Gero and Schindlmayr, Arno}},
  booktitle    = {{New Trends in Lithium Niobate: From Bulk to Nanocrystals}},
  editor       = {{Corradi, Gábor and Kovács, László}},
  isbn         = {{978-3-0365-3340-7}},
  pages        = {{231--248}},
  publisher    = {{MDPI}},
  title        = {{{Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response}}},
  doi          = {{10.3390/books978-3-0365-3339-1}},
  year         = {{2022}},
}

@article{47627,
  abstract     = {{In Germany, dual learning programmes are increasingly offered by higher education institutions. These programmes’ main characteristic and greatest challenge is their integration of academic and vocational learning. So far, this challenge has frequently been stated without specifying its exact nature and consequences for learners. The present study addresses this pedagogical research gap and examines the extent of variation in the degree of integration among dual study programmes. With reference to curriculum theory, the study develops an empirical typology of curricular integration in dual programmes. The data sample consists of 152 programmes at (dual) universities and universities of applied sciences. Data is analysed using hierarchical cluster analysis. Results indicate that the currently prevailing forms of curricular integration should best be differentiated according to five types. The five overlapping types of integration are located on a continuum ranging from parallelism through organisational linking to full curricular integration targeted immediately at students’ personal integration. The analysis confirms that there are problems with complying with integration standards set on the policy level. Above all, the study offers new insights on what marks the diverse integration landscape of dual study programmes. It proves that approaches to integration are more differentiated than previous research has shown.}},
  author       = {{Mordhorst, Lisa and Jenert, Tobias}},
  issn         = {{0018-1560}},
  journal      = {{Higher Education}},
  keywords     = {{Dual study programmes · Curricular integration · Curriculum theory · Empirical typology · Cluster analysis · Germany}},
  number       = {{6}},
  pages        = {{1257--1279}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Curricular integration of academic and vocational education: a theory-based empirical typology of dual study programmes in Germany}}},
  doi          = {{10.1007/s10734-022-00889-7}},
  volume       = {{85}},
  year         = {{2022}},
}

@inproceedings{35830,
  author       = {{Elsner, Julia and Tenberge, Claudia and Fechner, Sabine}},
  booktitle    = {{Fostering scientific citizenship in an uncertain world (Proceedings of ESERA 2021)}},
  editor       = {{Carvalho, Graça S. and Afonso, Ana Sofia and Anastácio, Zélia}},
  pages        = {{1241--1249}},
  publisher    = {{CIEC, University of Minho}},
  title        = {{{Modeling-based learning about chemical phenomena in primary education}}},
  year         = {{2022}},
}

@inproceedings{41800,
  author       = {{Sartison, M and  Camacho Ibarra, O and Jöns, Klaus D. and Caltzidis, I and Reuter, Dirk}},
  title        = {{{Scalable integration of quantum emitters into photonic integrated circuits}}},
  doi          = {{https://doi.org/10.1088/2633-4356/ac6f3e}},
  volume       = {{2}},
  year         = {{2022}},
}

@inproceedings{62967,
  author       = {{Pollmeier, Pascal and Fechner, Sabine}},
  booktitle    = {{Conference of National Association for Research in Science Teaching (NARST)}},
  keywords     = {{Epistemologie, Evidenzen, Daten, Umgang mit Daten, Kompetenzen, Studierende}},
  location     = {{Vancouver}},
  title        = {{{Preservice science teachers‘ competences in evidence based practice a longitudinal case study}}},
  year         = {{2022}},
}

@inproceedings{33224,
  author       = {{Peeters, Hendrik and Habig, Sebastian and Fechner, Sabine}},
  booktitle    = {{Unsicherheit als Element von naturwissenschaftsbezogenen Bildungsprozessen}},
  editor       = {{Habig, Sebastian and van Vorst, Helena}},
  keywords     = {{augmented reality, modelle, digitale Medien}},
  pages        = {{788--791}},
  title        = {{{Einbettung von Augmented Reality in den Experimentierprozess}}},
  volume       = {{42}},
  year         = {{2022}},
}

@inproceedings{62966,
  author       = {{Pollmeier, Pascal and Fechner, Sabine}},
  booktitle    = {{Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V.}},
  keywords     = {{Epistemologie, Evidenzen, Daten, Umgang mit Daten}},
  location     = {{Aachen}},
  title        = {{{Einfluss des Praxissemesters auf den Umgang mit Evidenzen im Unterricht}}},
  year         = {{2022}},
}

@phdthesis{52237,
  abstract     = {{Wie sieht ein Argument aus und wie eine Konklusion? Diese Frage, die seit Jahrhunderten auf der Ebene der Logik, der Rhetorik und der Dialektik diskutiert wird, beschäftigt auch die moderne Sprachwissenschaft. Die sprachliche Ausgestaltung von Argumentation ist so vielfältig, wie es auch das Phänomen der Argumentation selbst ist. Eine neue Form der Kategorisierung und eine systematische Beschreibung der Vielfalt dieser Argumentationsindikatoren stehen im Zentrum der vorliegenden Studie. Die qualitative und quantitative Analyse ausgewählter Indikatoren des Deutschen und des Französischen gewährt neue Erkenntnisse im Bereich des Sprachvergleichs und der Übersetzungsforschung. Die Studie richtet sich an alle, die sich für die Themen Argumentation, Übersetzung und deutsch-romanischer Sprachvergleich interessieren.}},
  author       = {{Kunert, Irene Dorothea}},
  pages        = {{402}},
  publisher    = {{Stauffenburg}},
  title        = {{{Argumentationsindikatoren im Deutschen und im Französischen}}},
  year         = {{2022}},
}

@article{40371,
  abstract     = {{<jats:p>Multimode integrated interferometers have great potential for both spectral engineering and metrological applications. However, the material dispersion of integrated platforms constitutes an obstacle that limits the performance and precision of such interferometers. At the same time, two-colour nonlinear interferometers present an important tool for metrological applications, when measurements in a certain frequency range are difficult. In this manuscript, we theoretically developed and investigated an integrated multimode two-colour SU(1,1) interferometer operating in a supersensitive mode. By ensuring the proper design of the integrated platform, we suppressed the dispersion, thereby significantly increasing the visibility of the interference pattern. The use of a continuous wave pump laser provided the symmetry between the spectral shapes of the signal and idler photons concerning half the pump frequency, despite different photon colours. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to 3×104 photons are generated.</jats:p>}},
  author       = {{Ferreri, Alessandro and Sharapova, Polina R.}},
  issn         = {{2073-8994}},
  journal      = {{Symmetry}},
  keywords     = {{Physics and Astronomy (miscellaneous), General Mathematics, Chemistry (miscellaneous), Computer Science (miscellaneous)}},
  number       = {{3}},
  publisher    = {{MDPI AG}},
  title        = {{{Two-Colour Spectrally Multimode Integrated SU(1,1) Interferometer}}},
  doi          = {{10.3390/sym14030552}},
  volume       = {{14}},
  year         = {{2022}},
}

@article{30210,
  abstract     = {{Lithium niobate on insulator (LNOI) has a great potential for photonic integrated circuits, providing substantial versatility in design of various integrated components. To properly use these components in the implementation of different quantum protocols, photons with different properties are required. In this paper, we theoretically demonstrate a flexible source of correlated photons built on the LNOI waveguide of a special geometry. This source is based on the parametric down-conversion (PDC) process, in which the signal and idler photons are generated at the telecom wavelength and have different spatial profiles and polarizations, but the same group velocities. Distinguishability in polarizations and spatial profiles facilitates the routing and manipulating individual photons, while the equality of their group velocities leads to the absence of temporal walk-off between photons. We show how the spectral properties of the generated photons and the number of their frequency modes can be controlled depending on the pump characteristics and the waveguide length. Finally, we discuss special regimes, in which narrowband light with strong frequency correlations and polarization-entangled Bell states are generated at the telecom wavelength.}},
  author       = {{Ebers, Lena and Ferreri, Alessandro and Hammer, Manfred and Albert, Maximilian and Meier, Cedrik and Förstner, Jens and Sharapova, Polina R.}},
  issn         = {{2515-7647}},
  journal      = {{Journal of Physics: Photonics}},
  keywords     = {{tet_topic_waveguide}},
  pages        = {{025001}},
  publisher    = {{IOP Publishing}},
  title        = {{{Flexible source of correlated photons based on LNOI rib waveguides}}},
  doi          = {{10.1088/2515-7647/ac5a5b}},
  volume       = {{4}},
  year         = {{2022}},
}