L'action fondée sur l'article L. 1224-1 du Code du travail n'est pas une action annexe à la procédure d'insolvabilité

in Revue des Procédures Collectives Civiles et Commerciales (2022)

Le projet de Code de droit international privé sous l'angle de la reconnaissance des sociétés

in Bulletin Joly Sociétés (2022)

La production de créances du syndic de la procédure principale au sein d'une procédure secondaire est soumise à la loi applicable à cette dernière procédure

in Revue des Procédures Collectives Civiles et Commerciales (2022)

La circonstance qu'un salarié exerce une fonction de direction sociale ne le prive pas de la protection offerte par la directive 2008/94/CE

in Revue des Procédures Collectives Civiles et Commerciales (2022)

Bücherschau

in Shakespeare Jahrbuch (2022)

Compétence exclusive des juridictions de l’État membre d’ouverture de la procédure d’insolvabilité pour connaître d’une action en inopposabilité

in Revue des Procédures Collectives Civiles et Commerciales (2021)

eJMT Problem Corner: June 2021

in The Electronic Journal of Mathematics & Technology (2021)

Chronique européenne Principes du droit administratif européen

in Revue Française d'Administration Publique (2021)

Preface - Journal of Applied Logics

in IfCoLog Journal of Logics and Their Applications (2021), 8(6), 1335-1338

"Afrika beklauen"

in Theater der Zeit (2020), (9), 30-32

Vor zehn Jahren starb Christoph Schlingensief und hinterließ der Welt seine letzte große Vision: das Operndorf Afrika. Ein Gespräch mit Zonatan Dembele und Koku G. Nonoa von Zonatan Dembele, Dorte Lena ... [more ▼]

Vor zehn Jahren starb Christoph Schlingensief und hinterließ der Welt seine letzte große Vision: das Operndorf Afrika. Ein Gespräch mit Zonatan Dembele und Koku G. Nonoa von Zonatan Dembele, Dorte Lena Eilers und Koku G. Nonoa [less ▲]

Smart Cities at Play: Technology and Emerging forms of playfulness

in Behaviour and Information Technology (2020), 39(6), 607-609

Vibrational properties of LaNiO3 films in the ultrathin regime

in APL MATERIALS (2020), 8(6),

Collective rotations and tilts of oxygen polyhedra play a crucial role in the physical properties of complex oxides such as magnetism and conductivity. Such rotations can be tuned by preparing thin films ... [more ▼]

Collective rotations and tilts of oxygen polyhedra play a crucial role in the physical properties of complex oxides such as magnetism and conductivity. Such rotations can be tuned by preparing thin films in which dimensionality, strain, and interface effects come into play. However, little is known of the tilt and rotational distortions in films a few unit cells thick including the question of if coherent tilt patterns survive at all in this ultrathin limit. Here, a series of films of perovskite LaNiO3 is studied and it is shown that the phonon mode related to oxygen octahedral tilts can be followed by Raman spectroscopy down to a film thickness of three pseudocubic perovskite unit cells (similar to 1.2 nm). To push the limits of resolution to the ultrathin regime, a statistical analysis method is introduced to separate the Raman signals of the film and substrate. Most interestingly, these analyses reveal a pronounced hardening of the tilt vibrational mode in the thinnest films. A comparison between the experimental results, first principles simulations of the atomic structure, and the standing wave model, which accounts for size effects on the phononic properties, reveals that in the ultrathin regime, the Raman spectra are a hybrid entity of both the bulk and surface phononic behavior. These results showcase Raman spectroscopy as a powerful tool to probe the behavior of perovskite films down to the ultrathin limit. [less ▲]

Preface (Special section on software systems 2020)

in Journal of Computer Science and Technology (2020), 35(6), 1231-1233

Role of the ferroelastic strain in the optical absorption of BiVO4

in APL MATERIALS (2020), 8(8),

Bismuth vanadate (BiVO4) has recently been under focus for its potential use in photocatalysis thanks to its well-suited absorption edge in the visible light range. Here, we characterize the optical ... [more ▼]

Bismuth vanadate (BiVO4) has recently been under focus for its potential use in photocatalysis thanks to its well-suited absorption edge in the visible light range. Here, we characterize the optical absorption of a BiVO4 single crystal as a function of temperature and polarization direction by reflectance and transmittance spectroscopy. The optical bandgap is found to be very sensitive to the temperature, and to the tetragonal-to-monoclinic ferroelastic transition at 523 K. The anisotropy, as measured by the difference in the absorption edge for the light polarized parallel and perpendicular to the principal axis, is reduced from 0.2 eV in the high-temperature tetragonal phase to 0.1 eV at ambient temperature. We show that this evolution is dominantly controlled by the ferroelastic shear strain. These findings provide a route for further optimization of bismuth vanadate-based light absorbers in photocatalytic devices. [less ▲]

Zeitschrift für interkulturelle Germanistik

in Zeitschrift für Interkulturelle Germanistik (2020), 11(2),

Anisotropy-driven thermal conductivity switching and thermal hysteresis in a ferroelectric

in APPLIED PHYSICS LETTERS (2019), 115(19),

Creating multiferroic and conductive domain walls in common ferroelastic compounds

in npj Computational Materials (2019), 5

Electric-Field Control of Magnetization, Jahn-Teller Distortion, and Orbital Ordering in Ferroelectric Ferromagnets

in PHYSICAL REVIEW LETTERS (2019), 122(24),

First-principles screening of ABO(3) oxides with two magnetic sublattices

in PHYSICAL REVIEW MATERIALS (2019), 3(6),

Observation of room-temperature polar skyrmions

in NATURE (2019), 568(7752), 368-

Theoretical investigation of lattice thermal conductivity and electrophononic effects in SrTiO3

in PHYSICAL REVIEW MATERIALS (2019), 3(4),

Du grand débat à la grande débacle

in Forum für Politik, Gesellschaft und Kultur in Luxemburg (2019), 393

Conference report: Injunctions and Flexibility in Patent Law – Civil Law and Common Law Perspectives.

in Gewerblicher Rechtsschutz und Urheberrecht (2019)

Bücherschau

in Shakespeare Jahrbuch (2019), 155

Accelerated Ionic Motion in Amorphous Memristor Oxides for Nonvolatile Memories and Neuromorphic Computing

in ADVANCED FUNCTIONAL MATERIALS (2019), 29(5),

Memristive devices based on mixed ionic-electronic resistive switches have an enormous potential to replace today's transistor-based memories and Von Neumann computing architectures thanks to their ... [more ▼]

Memristive devices based on mixed ionic-electronic resistive switches have an enormous potential to replace today's transistor-based memories and Von Neumann computing architectures thanks to their ability for nonvolatile information storage and neuromorphic computing. It still remains unclear however how ionic carriers are propagated in amorphous oxide films at high local electric fields. By using memristive model devices based on LaFeO3 with either amorphous or epitaxial nanostructures, we engineer the structural local bonding units and increase the oxygen-ionic diffusion coefficient by one order of magnitude for the amorphous oxide, affecting the resistive switching operation. We show that only devices based on amorphous LaFeO3 films reveal memristive behavior due to their increased oxygen vacancy concentration. We achieved stable resistive switching with switching times down to microseconds and confirm that it is predominantly the oxygen-ionic diffusion character and not electronic defect state changes that modulate the resistive switching device response. Ultimately, these results show that the local arrangement of structural bonding units in amorphous perovskite films at room temperature can be used to largely tune the oxygen vacancy (defect) kinetics for resistive switches (memristors) that are both theoretically challenging to predict and promising for future memory and neuromorphic computing applications. [less ▲]

Optical spectroscopy on the photo-response in multiferroic BiFeO3 at high pressure

in JOURNAL OF APPLIED PHYSICS (2019), 126(16),

The pressure dependence of light-induced effects in single-crystalline BiFeO3 is studied by optical spectroscopy. At low pressures, we observe three light-induced absorption features with energies just ... [more ▼]

The pressure dependence of light-induced effects in single-crystalline BiFeO3 is studied by optical spectroscopy. At low pressures, we observe three light-induced absorption features with energies just below the two crystal-field excitations and the absorption onset, respectively. These absorption features were previously ascribed to excitons, possibly connected with the ultrafast photostriction effect in BiFeO3. The pressure-induced redshift of the absorption features follows the pressure dependence of the corresponding crystal-field excitations and absorption onset, suggesting the link between them. Above the structural phase transition at P-c1 approximate to 3.5 GPa, the three absorption features disappear, suggesting their connection to the polar phase in BiFeO3. The pressure-induced disappearance of the photoinduced features is irreversible upon pressure release. Published under license by AIP Publishing. [less ▲]

Introduction - Recent Changes in EU Economic Governance: Methodological and Institutional Dynamics

in Journal of Contemporary European Research (2019), 15(2), 134-142

A decade after the outbreak of the Euro crisis, enough time has passed to assess its impact on EU economic governance. This Special Issue aims to identify the institutional dynamics that have occurred ... [more ▼]

A decade after the outbreak of the Euro crisis, enough time has passed to assess its impact on EU economic governance. This Special Issue aims to identify the institutional dynamics that have occurred since the crisis by using methodological approaches that reflect the rising complexity of decisionmaking under Economic and Monetary Union. The ambition of the contributing authors is to provide new theoretical insights and empirical findings and thereby to contribute to our understanding of the long-term ramifications of the Euro crisis for EU economic governance. This Special Issue addresses two broad research areas: power relations, institutional dynamics and decision-making practices, and the processes, efficacy and effectiveness of fiscal and economic policy coordination in the reformed setting of economic governance. [less ▲]

Conference report on the 45th German liquid crystal conference

in Liquid Crystals (2018), 27(3), 77-79

Editorial: Assessing behavior difficulties in students

in European Journal of Psychological Assessment (2018), 34(2), 6568

Zeitschrift für interkulturelle Germanistik

in ZiG (2018), 9(1),

Noncollinear magnetism in nanosized cobalt chromite

in Physical Review. B (2018), 98(6), 064407

Using a combination of neutron diffraction with XYZ polarization analysis and magnetization measurements, the noncollinear magnetism in nanosized cobalt chromite, a potential multiferroic material, is ... [more ▼]

Using a combination of neutron diffraction with XYZ polarization analysis and magnetization measurements, the noncollinear magnetism in nanosized cobalt chromite, a potential multiferroic material, is revealed. For noninteracting 26.9(1) nm nanoparticles, a bulklike behavior is identified, including a ferrimagnetic Curie temperature of 99 K and a transition to the spin spiral magnetic phase at 27 K with a temperature-dependent, incommensurate propagation vector. A lock-in transition towards a commensurate propagation vector is not observed. Much smaller, 3.1(2) nm, nanoparticles reveal a strong cluster glass behavior, characterized by ferrimagnetic behavior below the Curie temperature of 43 K and a transition to asperomagnetic behavior at 18 K, with the absence of any magnetic reflections at a base temperature of 5 K. [less ▲]

Transparent-to-dark photo- and electrochromic gels

in COMMUNICATIONS CHEMISTRY (2018), 1

Smart windows in which the transmittance can be controlled on demand are a promising solution for the reduction of energy use in buildings. Windows are often the most energy inefficient part of a building ... [more ▼]

Smart windows in which the transmittance can be controlled on demand are a promising solution for the reduction of energy use in buildings. Windows are often the most energy inefficient part of a building, and so controlling the transmittance has the potential to significantly improve heating costs. Whilst numerous approaches exist, many suitable materials are costly to manufacture and process and so new materials could have a significant impact. Here we describe a gel-based device which is both photo- and electrochromic. The gel matrix is formed by the self-assembly of a naphthalene diimide. The radical anion of the naphthalene diimide can be formed photo or electrochemically, and leads to a desirable transition from transparent to black. The speed of response, low potential needed to generate the radical anion, cyclability of the system, temperature stability and low cost mean these devices may be suitable for applications in smart windows. [less ▲]

Multiple-q noncollinear magnetism in an itinerant hexagonal magnet

in SCIENCE ADVANCES (2018), 4(11),

rticle Figures & Data Info & Metrics eLetters PDF Abstract Multiple-q spin order, i.e., a spin texture characterized by a multiple number of coexisting magnetic modulation vectors q, has recently ... [more ▼]

rticle Figures & Data Info & Metrics eLetters PDF Abstract Multiple-q spin order, i.e., a spin texture characterized by a multiple number of coexisting magnetic modulation vectors q, has recently attracted attention as a source of nontrivial magnetic topology and associated emergent phenomena. One typical example is the triple-q skyrmion lattice state stabilized by Dzyaloshinskii-Moriya interactions in noncentrosymmetric magnets, while the emergence of various multiple-q states of different origins is expected according to the latest theories. Here, we investigated the magnetic structure of the itinerant polar hexagonal magnet Y3Co8Sn4, in which several distinctive mechanisms favoring multiple-q states are allowed to become active. Small-angle neutron-scattering experiments suggest the formation of incommensurate triple-q magnetic order with an in-plane vortex-like spin texture, which can be most consistently explained in terms of the novel four-spin interaction mechanism inherent to itinerant magnets. The present results suggest a new route to realizing exotic multiple-q orders and that itinerant hexagonal magnets, including the R3M8Sn4 family with wide chemical tunability, can be a unique material platform to explore their rich phase diagrams. [less ▲]

A Hardware/Software Stack for Heterogeneous Systems

in IEEE Transactions on Multi-Scale Computing Systems (2017), PP(99), 1

Plenty of novel emerging technologies are being proposed and evaluated today, mostly at the device and circuit levels. It is unclear what the impact of different new technologies at the system level will ... [more ▼]

Plenty of novel emerging technologies are being proposed and evaluated today, mostly at the device and circuit levels. It is unclear what the impact of different new technologies at the system level will be. What is clear, however, is that new technologies will make their way into systems and will increase the already high complexity of heterogeneous parallel computing platforms, making it ever so difficult to program them. This paper discusses a programming stack for heterogeneous systems that combines and adapts well-understood principles from different areas, including capability-based operating systems, adaptive application runtimes, dataflow programming models, and model checking. We argue why we think that these principles built into the stack and the interfaces among the layers will also be applicable to future systems that integrate heterogeneous technologies. The programming stack is evaluated on a tiled heterogeneous multicore. [less ▲]

Kommunikation im Fokus der Elementarpädagogik

in KiTa aktuell HRS - Fachzeitschrift für Leitungen, Fachkräfte und Träger der Kindertagesbetreuung (2017), 25(5), 97

Aiming at a Moving Target: Theoretical and Methodological Considerations in the Study of Intraindividual Goal Conflict between Personal Goals

in FRONTIERS IN PSYCHOLOGY (2017), 8

Multiple-goal pursuit and conflict between personal life-defining goals can be considered part of everyday business in most individuals' lives. Given the potentially detrimental effects of goal conflict ... [more ▼]

Multiple-goal pursuit and conflict between personal life-defining goals can be considered part of everyday business in most individuals' lives. Given the potentially detrimental effects of goal conflict-for example, impaired well-being or poor performance-the literature on goal conflict is surprisingly scattered due to heterogeneous methodological approaches and technical terms. Little empirical research has addressed the conceptualization of goal conflict against the background of differing understandings from a structure-like and a process-like perspective. In the present article, we outline theoretical foundations of goal conflict from two perspectives: a structure-and a process-like perspective. Based on a comparative analysis and integration of these two perspectives, we systematically review empirical studies on goal conflict over 30 years of research. In doing so, we identify and discuss important conceptual dimensions of goal conflict, namely, goal conflict as a cognitive construct and an experiential instance, a focus on goal interrelations or on specific goal properties, and resource vs. inherent conflict, and the potential of these distinctions to further research on goal conflict. Finally, we present major challenges and pose questions that need to be addressed by future research. [less ▲]

Zeitschrift für interkulturelle Germanistik

in ZiG (2017), 8(1),

Konferenzbericht: Christlob Mylius. Ein kurzes Leben in den Schaltstellen der deutschen Aufklärung (Tagung in Siegen v. 3. –5.4.2017)

in Zeitschrift für Germanistik (2017), 37 (N. F.)

Current methodological issues in educational large-scale assessments. Part 2. Special Issue

in Psychological Test and Assessment Modeling (2017)

Chronique Administration européenne Principes du droit administratif européen

in Revue Française d'Administration Publique (2016)

Großschutzgebiete, Biodiversität und räumliche Planung

in Positionspapier aus der Akademie fuer Raumforschung und Landesplanung (2016), 107

Positionen 1 Stellenwert von Großschutzgebieten in der räumlichen Planung stärken 2 Zuständigkeiten von Großschutzgebieten klarer regeln und administrative Struk-turen harmonisieren 3 Monitoring und ... [more ▼]

Positionen 1 Stellenwert von Großschutzgebieten in der räumlichen Planung stärken 2 Zuständigkeiten von Großschutzgebieten klarer regeln und administrative Struk-turen harmonisieren 3 Monitoring und Qualitätsmanagement von Großschutzgebieten sicherstellen 4 Neben klassischem Naturschutz mehr Prozessschutz: Dynamik in Großschutz-gebieten zulassen 5 Großschutzgebiete bundesweit einheitlich zonieren 6 Ökosystemleistungen von Großschutzgebieten stärker für Kommunikation und räumliche Planung nutzen 7 Neue Strategien für den Umgang mit aktuellen Herausforderungen wie demo-graphischem Wandel, Klimawandel und Bodenspekulation in Großschutzgebieten ent-wickeln [less ▲]

Qualität frühkindlicher Bildung im europäischen Vergleich

in KiTa aktuell HRS - Fachzeitschrift für Leitungen, Fachkräfte und Träger der Kindertagesbetreuung (2016), 24(5), 97

Guest Editorial

in Special Issue: Current Methodological Issues in Educational Large-Scale Assessments – Part I (2016), 58

Zeitschrift für interkulturelle Germanistik

in ZiG (2016), 7(2),

The ECrtHR's interference in the dialogue between national courts and the Court of Justice of the EU: Implications for the Preliminary Reference Procedure

in Review of European Administrative Law (2015)

Chronique Administration européenne Principes du droit administratif européen

in Revue Française d'Administration Publique (2015)

Against the current: transboundary water management in small states on two continents

in WATER INTERNATIONAL (2015), 40(2), 231-250

Sprache und Identität: Aktivieren von Sprachressourcen bei Kindern

in KiTa aktuell HRS - Fachzeitschrift für Leitungen, Fachkräfte und Träger der Kindertagesbetreuung (2015), 23(07/08), 147

Growing up in a multicultural society

in EARA Newsletter - European Association of Research on Adolescence (2014)

Prenatal maternal stress and child developmental outcome: Implications for health care provision?

in Developmental Medicine and Child Neurology (2014), 56(3), 204-205