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

in Revue des Procédures Collectives Civiles et Commerciales (2022)

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See detailLe projet de Code de droit international privé sous l'angle de la lex societatis
Mastrullo, Thomas UL

in Bulletin Joly Sociétés (2022)

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See detailExequatur en France de la décision du juge monégasque condamnant un dirigeant à combler le passif
Mastrullo, Thomas UL

in Revue des Procédures Collectives Civiles et Commerciales (2022)

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See detailApplication dans le temps du règlement 2015/848
Mastrullo, Thomas UL

in Revue des Procédures Collectives Civiles et Commerciales (2022)

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See detailBücherschau
Steveker, Lena UL; Gruss, Susanne

in Shakespeare Jahrbuch (2022)

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See detailReview: Newspaper Navigator
Viola, Lorella UL

in Reviews in Digital Humanities (2022), III(6),

Created for the Library of Congress, Newspaper Navigator re-imagines how we search the rich visual content in historic newspapers. The first phase of the project utilized machine learning techniques to ... [more ▼]

Created for the Library of Congress, Newspaper Navigator re-imagines how we search the rich visual content in historic newspapers. The first phase of the project utilized machine learning techniques to extract visual content from 16.3 million digitized newspaper pages in Chronicling America. 1 This resulted in the Newspaper Navigator dataset, released in May 2020. The dataset and finetuned machine learning model 2 are in the public domain. A paper on the dataset was presented at the 2020 ACM Conference on Information Knowledge & Management (CIKM). The second phase consisted of building a search application for 1.5 million photos from the dataset. The search application was launched in September 2020. In addition to supporting faceted and keyword search, it empowers users to search by visual similarity by training an interactive machine learning model called an “AI navigator,” which enables users to retrieve photos of topics such as “baseball players” or “sailboats” even if their captions do not contain these keywords. An AI navigator can train and predict over all 1.5 million photos in a couple seconds. This new search affordance forms the basis for Benjamin Lee’s Ph. D. dissertation research, which re-imagines standard faceted search as “open faceted search.” A demo of the search application was presented at the 2020 ACM Symposium on User Interface and Software Technology (UIST). [less ▲]

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See detailDomaines respectifs de la lex fori concursus et de la lex contractus en matière d’actes préjudiciables aux créanciers
Mastrullo, Thomas UL

in Revue des Procédures Collectives Civiles et Commerciales (2021)

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See detaileJMT Problem Corner: June 2021
Kreis, Yves UL; Haas, Ben; Lavicza, Zsolt

in The Electronic Journal of Mathematics & Technology (2021)

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See detailBewertungshilfe zur Unterrichtseinheit #bewegteballaden
Krämer, Charlotte UL

in Programme for Innovative Teaching and Training (PITT) (2021)

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See detailChronique européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2021)

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See detailBücherschau
Steveker, Lena UL; Laqué, Stephan

in Shakespeare Jahrbuch (2021), 157

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See detailPreface - Journal of Applied Logics
Gabbay, Dov M. UL; Giacomin, Massimiliano; Simari, Guillermo Ricardo et al

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

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See detailLogiKEy Workbench: Deontic Logics, Logic Combinations and Expressive Ethical and Legal Reasoning (Isabelle/HOL Dataset)
Benzmüller, Christoph UL; Farjami, Ali UL; Fuenmajor, David et al

in Data in Brief (2020), 33

The LogiKEy workbench and dataset for ethical and legal reasoning is presented. This workbench simultaneously supports development, experimentation, assessment and deployment of formal logics and ethical ... [more ▼]

The LogiKEy workbench and dataset for ethical and legal reasoning is presented. This workbench simultaneously supports development, experimentation, assessment and deployment of formal logics and ethical and legal theories at different conceptual layers. More concretely, it comprises, in form of a dataset (Isabelle/HOL theory files), formal encodings of multiple deontic logics, logic combinations, deontic paradoxes and normative theories in the higher-order proof assistant system Isabelle/HOL. The data were acquired through application of the LogiKEy methodology, which supports experimentation with different normative theories, in different application scenarios, and which is not tied to specific logics or logic combinations. Our workbench consolidates related research contributions of the authors and it may serve as a starting point for further studies and experiments in flexible and expressive ethical and legal reasoning. It may also support hands-on teaching of non-trivial logic formalisms in lecture courses and tutorials. [less ▲]

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See detail"Afrika beklauen"
Eilers, Dorte Lena; Dembele, Zonatan; Nonoa, Koku Gnatuloma UL

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 ▲]

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See detailCréation d'une association européenne de droit international privé
Cuniberti, Gilles UL

in Recueil Dalloz (2020)

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See detailSmart Cities at Play: Technology and Emerging forms of playfulness
Papangelis, Konstantinos; Saker, Michael; Jones, Catherine UL

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

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See detailDomain-wall engineering and topological defects in ferroelectric and ferroelastic materials
Nataf, G. F.; Guennou, Mael UL; Gregg, J. M. et al

in Nature Reviews. Physics (2020), 2(11), 634-648

Ferroelectric and ferroelastic domain walls are 2D topological defects with thicknesses approaching the unit cell level. When this spatial confinement is combined with observations of emergent functional ... [more ▼]

Ferroelectric and ferroelastic domain walls are 2D topological defects with thicknesses approaching the unit cell level. When this spatial confinement is combined with observations of emergent functional properties, such as polarity in non-polar systems or electrical conductivity in otherwise insulating materials, it becomes clear that domain walls represent new and exciting objects in matter. In this Review, we discuss the exotic polarization profiles that can arise at domain walls with multiple order parameters and the different mechanisms that lead to domain-wall polarity in non-polar ferroelastic materials. The emergence of energetically degenerate variants of the domain walls themselves suggests the existence of interesting quasi-1D topological defects within such walls. We also provide an overview of the general notions that have been postulated as fundamental mechanisms responsible for domain-wall conduction in ferroelectrics. We then discuss the prospect of combining domain walls with transition regions observed at phase boundaries, homo- and heterointerfaces, and other quasi-2D objects, enabling emergent properties beyond those available in today's topological systems. Ferroelectric and ferroelastic domain walls are 2D topological defects with thicknesses approaching the unit cell level and emergent functional properties. This Review discusses the exotic polarization profiles that arise at domain walls and the fundamental mechanisms responsible for domain-wall conduction. [less ▲]

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See detailVibrational properties of LaNiO3 films in the ultrathin regime
Schober, Alexander; Fowlie, Jennifer; Guennou, Mael UL et al

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 ▲]

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See detailCommunications Concerning Execution: European Court of Human Rights (ECtHR)
Baglayan, Basak UL

in Max Planck Encyclopedia of International Procedural Law [MPEiPro] (2020)

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See detailPreface (Special section on software systems 2020)
Xie, Tao; Jin, Zhi; Li, Xuandong et al

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

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See detailBücherschau
Steveker, Lena UL; Laqué, Stephan

in Shakespeare Jahrbuch (2020), 156

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See detailRole of the ferroelastic strain in the optical absorption of BiVO4
Hill, Christina; Weber, Mads C.; Lehmann, Jannis et al

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 ▲]

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See detailIn memory of Ihor Stasyuk
Kreisel, Jens UL; Roleder, Krystian

in Phase Transitions (2020), 93(10-11), 945-945

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See detailZeitschrift für interkulturelle Germanistik
Amann, Wilhelm UL; Dembeck, Till UL; Heimböckel, Dieter UL et al

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

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See detailViewpoint: Atomic-Scale Design Protocols toward Energy, Electronic, Catalysis, and Sensing Applications
Belviso, Florian; Claerbout, Victor E. P.; Comas-Vives, Aleix et al

in INORGANIC CHEMISTRY (2019), 58(22), 14939-14980

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See detailAnisotropy-driven thermal conductivity switching and thermal hysteresis in a ferroelectric
Antonio Seijas-Bellido, Juan; Iñiguez, Jorge UL; Rurali, Riccardo

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

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See detailGiant Electrophononic Response in PbTiO3 by Strain Engineering
Torres, Pol; Iñiguez, Jorge UL; Rurali, Riccardo

in PHYSICAL REVIEW LETTERS (2019), 123(18),

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See detailCreating multiferroic and conductive domain walls in common ferroelastic compounds
Zhao, Hong Jian; Iñiguez, Jorge UL

in npj Computational Materials (2019), 5

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See detailHigh-pressure structural change in the ferroelectric layered perovskite Sr2Nb2O7
Alanis, Javier; Joazet Ojeda-Galvan, Hiram; Rodriguez-Aranda, M. C. et al

in Physical Review. B (2019), 100(5),

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See detailElectric-Field Control of Magnetization, Jahn-Teller Distortion, and Orbital Ordering in Ferroelectric Ferromagnets
Chen, Lan; Xu, Changsong; Tian, Haoye UL et al

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

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See detailStrain engineering of ZnO thermal conductivity
Antonio Seijas-Bellido, Juan; Rurali, Riccardo; Iñiguez, Jorge UL et al

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

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See detailFirst-principles screening of ABO(3) oxides with two magnetic sublattices
Zhao, Hong Jian; Bellaiche, Laurent; Iñiguez, Jorge UL

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

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See detailFerroelectricity with Asymmetric Hysteresis in Metallic LiOsO3 Ultrathin Films
Lu, Jinlian; Chen, Gong; Luo, Wei et al

in PHYSICAL REVIEW LETTERS (2019), 122(22),

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See detailObservation of room-temperature polar skyrmions
Das, S.; Tang, Y. L.; Hong, Z. et al

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

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See detailFerroelectric negative capacitance
Iñiguez, Jorge UL; Zubko, Pavlo; Luk'yanchuk, Igor et al

in Nature Reviews Materials (2019), 4(4), 243-256

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See detailTheoretical investigation of lattice thermal conductivity and electrophononic effects in SrTiO3
Torres, Pol; Antonio Seijas-Bellido, Juan; Escorihuela-Sayalero, Carlos et al

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

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See detailFirst-Principles Study of Ferroelastic Twins in Halide Perovskites
Warwick, Andrew R.; Iñiguez, Jorge UL; Haynes, Peter D. et al

in JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2019), 10(6), 1416-1421

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See detailDu grand débat à la grande débacle
Kies, Raphaël UL

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

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See detailTheoretical guidelines to create and tune electric skyrmion bubbles
Pereira Goncalves, M. A.; Escorihuela-Sayalero, Carlos; Garca-Fernandez, Pablo et al

in SCIENCE ADVANCES (2019), 5(2),

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See detailConference report: Injunctions and Flexibility in Patent Law – Civil Law and Common Law Perspectives.
Antoine, Luice; Stierle, Martin UL

in Gewerblicher Rechtsschutz und Urheberrecht (2019)

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See detailVorwort
Neumann, Sascha UL

in ElFo - Elementarpädagogische Forschungsbeiträge (2019)

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See detailBücherschau
Steveker, Lena UL; Laqué, Stephan

in Shakespeare Jahrbuch (2019), 155

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See detailSpatially resolved steady-state negative capacitance (vol 565, pg 468, 2019)
Yadav, Ajay K.; Nguyen, Kayla X.; Hong, Zijian et al

in NATURE (2019), 568(7753), 13-13

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See detailAccelerated Ionic Motion in Amorphous Memristor Oxides for Nonvolatile Memories and Neuromorphic Computing
Schmitt, Rafael; Kubicek, Markus; Sediva, Eva et al

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 ▲]

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See detailZeitschrift für interkulturelle Germanistik
Amann, Wilhelm UL; Dembeck, Till UL; Heimböckel, Dieter UL et al

in Zeitschrift für Interkulturelle Germanistik (2019), 10(2),

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See detailOptical spectroscopy on the photo-response in multiferroic BiFeO3 at high pressure
Meggle, F.; Ebad-Allah, J.; Kreisel, Jens UL et al

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 ▲]

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See detailZeitschrift für interkulturelle Germanistik
Amann, Wilhelm UL; Dembeck, Till UL; Heimböckel, Dieter UL et al

in Zeitschrift für Interkulturelle Germanistik (2019), 10(1),

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See detailIntroduction - Recent Changes in EU Economic Governance: Methodological and Institutional Dynamics
Chang, Michele; Sacher, Martin UL; Tkalec, Igor UL

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 ▲]

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See detailThe Giant has woken up: the European Union’s Plans for the Future of Artificial Intelligence (AI)
Kafteranis, Dimitrios UL

in Irish Journal for European Law (2018), 21

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See detailConference report on the 45th German liquid crystal conference
Honaker, Lawrence William UL

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

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See detailTax and the Digital Economy – Bericht zur Konferenz vom 20.4.2018, Universität Luxemburg
Sinnig, Julia UL

in Internationale Steuer-Rundschau: Zeitschrift für Internationales Steuerrecht (2018), 7(6), 225-226

The ATOZ Chair for European and International Taxation of the University of Luxembourg invited renowned tax experts to discuss “Tax and the Digital Economy” on 20 April 2018; one month after the OECD ... [more ▼]

The ATOZ Chair for European and International Taxation of the University of Luxembourg invited renowned tax experts to discuss “Tax and the Digital Economy” on 20 April 2018; one month after the OECD published its 2018 interim report on BEPS Action 1 and the EU Commission its proposals on significant digital presence and a digital services tax. [less ▲]

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See detailEditorial: Assessing behavior difficulties in students
Zurbriggen, Carmen UL; Schwab, Susanne; de Boer, Anke et al

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

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See detailStill comparing apples with oranges? Some thoughts on the principles and practices of measurement invariance testing
Greiff, Samuel UL; Scherer, R.

in European Journal of Psychological Assessment (2018), 34

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Gesine Lenore et al

in ZiG (2018), 9(1),

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See detailTrends and transitions
Vögele, Claus UL

in European Journal of Health Psychology (2018), 25(1), 1

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See detailNoncollinear magnetism in nanosized cobalt chromite
Zakutna, D.; Vlcek, J.; Fitl, P. et al

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 ▲]

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See detailRelating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
Bender, Philipp Florian UL; Fock, Jeppe; Frandsen, Cathrine et al

in Journal of Physical Chemistry. C, Nanomaterials and interfaces (2018), 122(5), 3068-3077

We investigated, in depth, the interrelations among structure, magnetic properties, relaxation dynamics and magnetic hyperthermia performance of magnetic nanoflowers. The nanoflowers are about 39 nm in ... [more ▼]

We investigated, in depth, the interrelations among structure, magnetic properties, relaxation dynamics and magnetic hyperthermia performance of magnetic nanoflowers. The nanoflowers are about 39 nm in size, and consist of densely packed iron oxide cores. They display a remanent magnetization, which we explain by the exchange coupling between the cores, but we observe indications for internal spin disorder. By polarized small-angle neutron scattering, we unambiguously confirm that, on average, the nanoflowers are preferentially magnetized along one direction. The extracted discrete relaxation time distribution of the colloidally dispersed particles indicates the presence of three distinct relaxation contributions. We can explain the two slower processes by Brownian and classical Néel relaxation, respectively. The additionally observed very fast relaxation contributions are attributed by us to the relaxation of disordered spins within the nanoflowers. Finally, we show that the intrinsic loss power (ILP, magnetic hyperthermia performance) of the nanoflowers measured in colloidal dispersion at high frequency is comparatively large and independent of the viscosity of the surrounding medium. This concurs with our assumption that the observed relaxation in the high frequency range is primarily a result of internal spin relaxation, and possibly connected to the disordered spins within the individual nanoflowers. [less ▲]

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See detailTransparent-to-dark photo- and electrochromic gels
Gonzalez, Laura; Liu, Chung; Dietrich, Bart et al

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 ▲]

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See detailZeitschrift für interkulturelle Germanistik
Amann, Wilhelm UL; Dembeck, Till UL; Heimböckel, Dieter UL et al

in ZiG (2018), 9(2),

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See detailMultiple-q noncollinear magnetism in an itinerant hexagonal magnet
Takagi, R.; White, J. S.; Hayami, S. et al

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 ▲]

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See detailTagungsbericht: 71. International Fiscal Association Kongress 2017
Sinnig, Julia UL

in Internationale Steuer-Rundschau: Zeitschrift für Internationales Steuerrecht (2017), 6(12), 453-460

The 71st International Fiscal Association (IFA) Congress took place from 27 August to 1 September 2017 in Rio de Janeiro. The two main subjects of the congress were dedicated to the status quo of the base ... [more ▼]

The 71st International Fiscal Association (IFA) Congress took place from 27 August to 1 September 2017 in Rio de Janeiro. The two main subjects of the congress were dedicated to the status quo of the base erosion and profit shifting (BEPS) project and the future of transfer pricing. In addition, further seminars covered ten other topics. [less ▲]

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See detailA Hardware/Software Stack for Heterogeneous Systems
Castrillon, Jeronimo; Lieber, Matthias; Klueppelholz, Sascha et al

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 ▲]

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See detailAccessible length scale of the in-plane structure in polarized neutron off-specular and grazing-incidence small-angle scattering measurements
Maruyama, R.; Bigault, T.; Wildes, A. R. et al

in Journal of Physics. Conference Series (2017), 862

Polarized neutron off-specular and grazing-incidence small-angle scattering measurements are useful methods to investigate the in-plane structure and its correlation of layered systems. Although these ... [more ▼]

Polarized neutron off-specular and grazing-incidence small-angle scattering measurements are useful methods to investigate the in-plane structure and its correlation of layered systems. Although these measurements give information on complementary and overlapping length scale, the different characteristics between them need to be taken into account when performed. In this study, the difference in the accessible length scale of the in-plane structure, which is one of the most important characteristics, was discussed using an Fe/Si multilayer together with simulations based on the distorted wave Born approximation. [less ▲]

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See detailKommunikation im Fokus der Elementarpädagogik
Andersen, Katja Natalie UL

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

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See detailSpin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering
Siegfried, S.-A.; Sukhanov, A. S.; Altynbaev, E. V. et al

in Physical Review. B (2017), 95(13), 134415

We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature range from 225 K up to TC ≈ 278.7 K by small-angle neutron scattering. The method we have used is ... [more ▼]

We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature range from 225 K up to TC ≈ 278.7 K by small-angle neutron scattering. The method we have used is based on [Grigoriev et al., Phys. Rev. B 92, 220415(R) (2015)] and was extended here for the application in polycrystalline samples. We confirm the validity of the anisotropic spin-wave dispersion for FeGe caused by the Dzyaloshinskii-Moriya interaction. We have shown that the spin-wave stiffness A for the FeGe helimagnet decreases with a temperature as A(T ) = 194[1 − 0.7(T/TC)4.2] meV °A2. The finite value of the spin-wave stiffness A = 58 meV °A2 at TC classifies the order-disorder phase transition in FeGe as being the first-order one. [less ▲]

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See detailAiming at a Moving Target: Theoretical and Methodological Considerations in the Study of Intraindividual Goal Conflict between Personal Goals
Gorges, Julia; Grund, Axel UL

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 ▲]

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See detailTechnological addictions: Conceptualisation, measurement, etiology and treatment.
Kuss, Daria J.; Billieux, Joël UL

in Addictive behaviors (2017), 64

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Gesine Lenore et al

in ZiG (2017), 8(1),

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Gesine Lenore et al

in ZiG (2017), 8(2),

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See detailChronique Administration européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2017)

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See detailChronique Administration européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2016)

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See detailChronique Administration européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2016)

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See detailThe EU and The Human Right to Water and Sanitation: Normative Coherence as the Key to Transformative Development
Koff, Harlan UL; Maganda, Carmen

in European Journal of Development Research (2016), 28(1), 91-110

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See detailGroßschutzgebiete, Biodiversität und räumliche Planung
Heiland, Stefan; Jedicke, Eckhard; Job, Hubert et al

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 ▲]

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See detailThe small-angle neutron scattering instrument D33 at the Institut Laue-Langevin
Dewhurst, C. D.; Grillo, I.; Honecker, Dirk UL et al

in JOURNAL OF APPLIED CRYSTALLOGRAPHY (2016), 49

The D33 small-angle neutron scattering (SANS) instrument at the Institut Laue–Langevin (ILL) is the most recent SANS instrument to be built at the ILL. In a project beginning in 2005 and lasting seven ... [more ▼]

The D33 small-angle neutron scattering (SANS) instrument at the Institut Laue–Langevin (ILL) is the most recent SANS instrument to be built at the ILL. In a project beginning in 2005 and lasting seven years, the concept has been developed, and the instrument designed, manufactured and installed. D33 was commissioned with neutrons during the second half of 2012, fully entering the ILL user programme in 2013. The scientific case required that D33 should provide a wide dynamic range of measured scattering vector magnitude q, flexibility with regard to the instrument resolution, and the provision of polarized neutrons and 3He spin analysis to facilitate and expand studies in magnetism. In monochromatic mode, a velocity selector and a flexible system of inter-collimation apertures define the neutron beam. A double-chopper system enables a time-of-flight (TOF) mode of operation, allowing an enhanced dynamic q range (qmax/qmin) and a flexible wavelength resolution. Two large multitube detectors extend the dynamic q range further, giving qmax/qmin ’ 25 in monochromatic mode and a very large qmax/qmin > 1000 in TOF mode. The sample zone is large and flexible in configuration, accommodating complex and bulky sample environments, while the position of D33 is such as to allow high magnetic fields at the sample position. The instrument is of general purpose with a performance rivalling that of D22, and is well adapted for SANS studies in scientific disciplines as diverse as solution scattering in biology and soft matter and studies of physics, materials science and magnetism. This article provides a detailed technical description of D33 and its performance and characterization of the individual components, and serves as a technical reference for users of the instrument. [less ▲]

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See detailQualität frühkindlicher Bildung im europäischen Vergleich
Andersen, Katja Natalie UL

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

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Lenore Gesine et al

in ZiG (2016), 7(1),

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See detailGuest Editorial
Stadler, Matthias UL; Greiff, Samuel UL; Krolak-Schwerdt, Sabine UL

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

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See detailGroßschutzgebiete, Biodiversität und räumliche Planung. Ein Positionspapier aus der Akademie für Raumforschung und Landesplanung
Heiland, Stefan; Jedicke, Eckhardt; Job, Hubert et al

in Naturschutz und Landschaftsplanung (2016), 48(9),

Zu Fragen einer Förderung der Biodiversität und nachhaltiger Landnutzung in Groß­schutzgebieten hat ein gleichnamiger Arbeits­kreis2 der Akademie für Raumforschung und Landesplanung (ARL) ein ... [more ▼]

Zu Fragen einer Förderung der Biodiversität und nachhaltiger Landnutzung in Groß­schutzgebieten hat ein gleichnamiger Arbeits­kreis2 der Akademie für Raumforschung und Landesplanung (ARL) ein Positionspapier vorgelegt. Neben sieben Thesen fordert der Arbeitskreis als Fazit eine „Bund­Länder­Gemeinschaftsaufgabe Groß­schutzgebiete“. [less ▲]

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Lenore Gesine et al

in ZiG (2016), 7(2),

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See detailmiR-661 expression in SNAI1-induced epithelial to mesenchymal transition contributes to breast cancer cell invasion by targeting Nectin-1 and StarD10 messengers
Vetter, G.; Saumet, A.; Moes, Michèle UL et al

in Oncogene (2016), 35(5), 670

Epithelial to mesenchymal transition (EMT) is a key step toward metastasis. MCF7 breast cancer cells conditionally expressing the EMT master regulator SNAI1 were used to identify early expressed microRNAs ... [more ▼]

Epithelial to mesenchymal transition (EMT) is a key step toward metastasis. MCF7 breast cancer cells conditionally expressing the EMT master regulator SNAI1 were used to identify early expressed microRNAs (miRNAs) and their targets that may contribute to the EMT process. Potential targets of miRNAs were identified by matching lists of in silico predicted targets and of inversely expressed mRNAs. MiRNAs were ranked based on the number of predicted hits, highlighting miR-661, a miRNA with so far no reported role in EMT. MiR-661 was found required for efficient invasion of breast cancer cells by destabilizing two of its predicted mRNA targets, the cell-cell adhesion protein Nectin-1 and the lipid transferase StarD10, resulting, in turn, in the downregulation of epithelial markers. Reexpression of Nectin-1 or StarD10 lacking the 3'-untranslated region counteracted SNAI1-induced invasion. Importantly, analysis of public transcriptomic data from a cohort of 295 well-characterized breast tumor specimen revealed that expression of StarD10 is highly associated with markers of luminal subtypes whereas its loss negatively correlated with the EMT-related, basal-like subtype. Collectively, our non-a priori approach revealed a nonpredicted link between SNAI1-triggered EMT and the down-regulation of Nectin-1 and StarD10 through the up-regulation of miR-661, which may contribute to the invasion of breast cancer cells and poor disease outcome. [less ▲]

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See detailChronique Administration européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2015)

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See detailChronique Administration européenne Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2015)

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Hess-Lüttich, Ernest W.B.; Mein, Georg UL et al

in ZiG (2015), 6(1),

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See detailAgainst the current: transboundary water management in small states on two continents
Koff, Harlan UL; Maganda, Carmen

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

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See detailZeitschrift für interkulturelle Germanistik
Heimböckel, Dieter UL; Mein, Georg UL; Schiewer, Gesine Lenore et al

in ZiG (2015), 6(2),

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See detailSprache und Identität: Aktivieren von Sprachressourcen bei Kindern
Andersen, Katja Natalie UL

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

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See detailVernetzung von Theorie und Praxis: Herausforderungen an die Aus- und Weiterbildung im frühkindlichen Bereich
Andersen, Katja Natalie UL

in KiTa aktuell HRS - Fachzeitschrift für Leitungen, Fachkräfte und Träger der Kindertagesbetreuung (2015), 23(6), 123

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See detailGrowing up in a multicultural society
Albert, Isabelle UL

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

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See detailOn being bicultural in a multicultural society
Murdock, Elke UL; Ferring, Dieter UL

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

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See detailPrenatal maternal stress and child developmental outcome: Implications for health care provision?
Pit-Ten Cate, Ineke UL

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

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See detailChronique Administration européenne, Principes du droit administratif européen
Neframi, Eleftheria UL

in Revue Française d'Administration Publique (2014)

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