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See detailUnfreie Arbeit. Trabalho escravo in der brasilianischen Landwirtschaft.
Harnoncourt, Julia UL

Book published by Promedia (2018)

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See detailDie unfreien Befreiten. Über die lange Heimkehr der sowjetischen ZwangsarbeiterInnen aus Luxemburg.
Ganschow, Inna UL

Scientific Conference (2022, May 17)

Inna Ganschow untersucht in ihrem Vortrag die verschiedenen Typen totaler Institutionen im Sinne Erving Goffmans auf dem Weg von ZwangsarbeiterInnen aus der Sowjetunion nach Luxemburg und zurück. Von den ... [more ▼]

Inna Ganschow untersucht in ihrem Vortrag die verschiedenen Typen totaler Institutionen im Sinne Erving Goffmans auf dem Weg von ZwangsarbeiterInnen aus der Sowjetunion nach Luxemburg und zurück. Von den nationalsozialistischen Durchgangs- und Kriegsgefangenenlagern über die luxemburgischen Werk- und Ostarbeiterlager bis hin zu den sowjetischen Sammel- und Filterlagern endete die lange Reise nach Hause oft nach einigen Monaten oder Jahren erneut in einem Lager oder einer Zwangsansiedlung. Die Repatriierung junger ukrainischer, weißrussischer und russischer Frauen wird anhand von erhaltenen Dokumenten aus erster Hand, verschiedenen Lager- und Betriebsunterlagen sowie Augenzeugenberichten rekonstruiert. Die Rückführung wird im Hinblick auf ihre Funktion analysiert, die eine Bestrafung, eine Belohnung oder ein Schutz sein konnte. [less ▲]

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See detailDer ungeplante Ausbau des Luxemburgischen im Spannungsfeld von Germania und Romania
Fehlen, Fernand UL

in Quo Vadis, Romania? (2015), (45), 65-80

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See detailUngerechtigkeitssensibilität als Prädiktor soziopolitischen Erlebens und Verhaltens – Entwicklung und Validierung einer Kurzskala
Beierlein, C.; Baumert, A.; Schmitt, M. et al

Scientific Conference (2011, September)

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See detailUngleiche Schwestern? Hochbegabung und Kreativität.
Baudson, Tanja Gabriele UL

Article for general public (2010)

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See detailUngleicheiten in früher Kindheit. Was trägt die Kindertagesbetreuung zu deren Abbau oder Verstetigung bei?
Bollig, Sabine UL; Betz, Tanja

in Luxemburg, Caritas (Ed.) Caritas Sozialalmanach 2016- Ungleichheiten (2016)

Wie die meisten EU-Staaten, setzt auch Luxemburg mit dem quantitativen wie qualitativen Ausbau von Kindertageseinrichtungen in der frühen Kindheit auf so genannte kindzentrierte sozialinvestive ... [more ▼]

Wie die meisten EU-Staaten, setzt auch Luxemburg mit dem quantitativen wie qualitativen Ausbau von Kindertageseinrichtungen in der frühen Kindheit auf so genannte kindzentrierte sozialinvestive Politikstrategien , in deren Zuge eine flächendeckende, hochwertige und frühe Kindertagesbetreuung als besonders „effektives Mittel im Krieg gegen die Vererbung sozialer Nachteile “ angesehen wird. Den vorschulischen Kindertageseinrichtungen kommt neben ihrer arbeits- und sozialpolitischen Funktion dabei vor allem die Aufgabe zu, gleichsam präventiv-kompensatorisch dafür zu sorgen, dass alle Kinder gleich welcher Herkunft durch frühe Bildungsangebote gute Startbedingungen für ihre schulische Bildungslaufbahn erhalten. Vor dem Hintergrund der bereits für das Schulsystem dargelegten Spannung zwischen dem Abbau sozialer Ungleichheiten und deren Reproduktion durch ihre Übersetzung in Bildungsungleichheiten, drängt sich jedoch die Frage auf, ob und wenn ja wie genau Kindertageseinrichtungen in der Lage sind diese hohen Erwartungen zu erfüllen. Gelingt es Kindertageseinrichtungen bisher ungleiche soziale Bildungsbedingungen von jungen Kindern auszugleichen oder lassen sich vielmehr Prozesse einer ‚Verfrühung von Bildungsungleichheiten’ beobachten? Diese Fragen stehen im Fokus des Beitrags, der den internationalen Stand der Forschung zum Zusammenhang von sozialer Ungleichheit und Kindertagesbetreuung nachzeichnet. An ausgewählten Forschungsergebnissen werden dabei insbesondere die sich bisher abzeichnenden Mechanismen der Reproduktion sozialer Ungleichheiten in der Kindertagesbetreuung aufgezeigt, die Ansatzpunkte für eine ungleichheitssensible Qualitätsentwicklung liefern können. [less ▲]

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See detailUngleichheiten in schulischen Gesundheitsproblemen und subjektivem Wohlbefinden bei luxemburgischen Grund- und Sekundarschüler/innen
Hadjar, Andreas UL; de Moll, Frederick UL

in Heinen, Andreas; Samuel, Robin; Willems, Helmut Erich (Eds.) et al Wohlbefinden und Gesundheit im Jugendalter. Theoretische Perspektiven, empirische Befunde und Praxis (2022)

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See detailThe unholy alliance of „genius and madness.“
Baudson, Tanja Gabriele UL; Preckel, F.

Scientific Conference (2008)

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See detailUni.lu HPC Annual Report 2020
Varrette, Sébastien UL

Report (2021)

2020 was a challenging year for everyone that will stay in our memory. The pandemic disrupted our economies, societies, and all our best laid-out plans. However, COVID-19 also taught us several lessons ... [more ▼]

2020 was a challenging year for everyone that will stay in our memory. The pandemic disrupted our economies, societies, and all our best laid-out plans. However, COVID-19 also taught us several lessons for the future, in particular the (real) necessity to adapt, to be nimble and to expect the unexpected while supporting cutting-edge excellence in science with the best performing and most flexible tools to unleash research potential. One thing is certain - the strategic developments for accelerated digitalisation and the role that HPC will play to ensure a smarter and more connected University will be in focus in 2021 and the years to come. 2020 was thus a very fruitful and productive year for the ULHPC team which has seen unprecedented changes and challenges. [less ▲]

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See detailUniaxial negative thermal expansion and metallophilicity in Cu3[Co(CN)6]
Sapnik, A. F.; Liu, X.; Böstrom, H. L. B. et al

in Journal of Solid State Chemistry (2018), 258

We report the synthesis and structural characterisation of the molecular framework copper(I) hexacyanocobaltate(III), Cu3[Co(CN)6], which we find to be isostructural to H3[Co(CN)6] and the colossal ... [more ▼]

We report the synthesis and structural characterisation of the molecular framework copper(I) hexacyanocobaltate(III), Cu3[Co(CN)6], which we find to be isostructural to H3[Co(CN)6] and the colossal negative thermal expansion material Ag3[Co(CN)6]. Using synchrotron X-ray powder diffraction measurements, we find strong positive and negative thermal expansion behaviour respectively perpendicular and parallel to the trigonal crystal axis: α = 25.4(5) MK a −1 and α = − 43.5(8) MK c −1. These opposing effects collectively result in a volume expansivity α = 7.4(11) MK V −1 that is remarkably small for an anisotropic molecular framework. This thermal response is discussed in the context of the behaviour of the analogous H- and Ag-containing systems. We make use of density-functional theory with many-body dispersion interactions (DFT + MBD) to demonstrate that Cu+…Cu+ metallophilic (‘cuprophilic’) interactions are significantly weaker in Cu3[Co(CN)6] than Ag+…Ag+ interactions in Ag3[Co(CN)6], but that this lowering of energy scale counterintuitively translates to a more moderate—rather than enhanced—degree of structural flexibility. The same conclusion is drawn from consideration of a simple GULP model, which we also present here. Our results demonstrate that strong interactions can actually be exploited in the design of ultra-responsive materials if those interactions are set up to act in tension. [less ▲]

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See detailUniaxial polarization analysis of bulk ferromagnets: theory and first experimental results
Malyeyev, Artem UL; Titov, Ivan UL; Dewhurst, Charles et al

in Journal of Applied Crystallography (2022), 55

Based on Brown’s static equations of micromagnetics, the uniaxial polarization of the scattered neutron beam of a bulk magnetic material is computed. The approach considers a Hamiltonian that takes into ... [more ▼]

Based on Brown’s static equations of micromagnetics, the uniaxial polarization of the scattered neutron beam of a bulk magnetic material is computed. The approach considers a Hamiltonian that takes into account the isotropic exchange interaction, the antisymmetric Dzyaloshinskii–Moriya interaction, magnetic anisotropy, the dipole–dipole interaction, as well as the effect of an applied magnetic field. In the high-field limit, the solutions for the magnetization Fourier components are used to obtain closed-form results for the spinpolarized SANS (small-angle neutron scattering) cross sections and the ensuing polarization. The theoretical expressions are compared with experimental data on a soft magnetic nanocrystalline alloy. The micromagnetic SANS theory provides a general framework for polarized real-space neutron methods, and it may open up a new avenue for magnetic neutron data analysis on magnetic microstructures. [less ▲]

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See detailUnidirectional P-body transport during the yeast cell cycle.
Garmendia-Torres, Cecilia; Skupin, Alexander UL; Michael, Sean A. et al

in PloS one (2014), 9(6), 99428

P-bodies belong to a large family of RNA granules that are associated with post-transcriptional gene regulation, conserved from yeast to mammals, and influence biological processes ranging from germ cell ... [more ▼]

P-bodies belong to a large family of RNA granules that are associated with post-transcriptional gene regulation, conserved from yeast to mammals, and influence biological processes ranging from germ cell development to neuronal plasticity. RNA granules can also transport RNAs to specific locations. Germ granules transport maternal RNAs to the embryo, and neuronal granules transport RNAs long distances to the synaptic dendrites. Here we combine microfluidic-based fluorescent microscopy of single cells and automated image analysis to follow p-body dynamics during cell division in yeast. Our results demonstrate that these highly dynamic granules undergo a unidirectional transport from the mother to the daughter cell during mitosis as well as a constrained "hovering" near the bud site half an hour before the bud is observable. Both behaviors are dependent on the Myo4p/She2p RNA transport machinery. Furthermore, single cell analysis of cell size suggests that PBs play an important role in daughter cell growth under nutrient limiting conditions. [less ▲]

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See detailUnification of functional annotation descriptions using text mining
Teixeira Queiros, Pedro UL; Novikova, Polina UL; Wilmes, Paul UL et al

in Biological Chemistry (2021)

A common approach to genome annotation involves the use of homology-based tools for the prediction of the functional role of proteins. The quality of functional annotations is dependent on the reference ... [more ▼]

A common approach to genome annotation involves the use of homology-based tools for the prediction of the functional role of proteins. The quality of functional annotations is dependent on the reference data used, as such, choosing the appropriate sources is crucial. Unfortunately, no single reference data source can be universally considered the gold standard, thus using multiple references could potentially increase annotation quality and coverage. However, this comes with challenges, particularly due to the introduction of redundant and exclusive annotations. Through text mining it is possible to identify highly similar functional descriptions, thus strengthening the confidence of the final protein functional annotation and providing a redundancy-free output. Here we present UniFunc, a text mining approach that is able to detect similar functional descriptions with high precision. UniFunc was built as a small module and can be independently used or integrated into protein function annotation pipelines. By removing the need to individually analyse and compare annotation results, UniFunc streamlines the complementary use of multiple reference datasets. [less ▲]

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See detailUnified Description of the Optical Phonon Modes in N-Layer MoTe2
Froehlicher, Guillaume; Lorchat, Etienne; Fernique, François et al

in Nano Letters (2015), 15

N-layer transition metal dichalcogenides provide a unique platform to investigate the evolution of the physical properties between the bulk (three-dimensional) and monolayer (quasi-two-dimensional) limits ... [more ▼]

N-layer transition metal dichalcogenides provide a unique platform to investigate the evolution of the physical properties between the bulk (three-dimensional) and monolayer (quasi-two-dimensional) limits. Here, using high-resolution micro-Raman spectroscopy, we report a unified experimental description of the Γ-point optical phonons in N-layer 2H-molybdenum ditelluride (MoTe2). We observe series of N-dependent low-frequency interlayer shear and breathing modes (below 40 cm–1, denoted LSM and LBM) and well-defined Davydov splittings of the mid-frequency modes (in the range 100–200 cm–1, denoted iX and oX), which solely involve displacements of the chalcogen atoms. In contrast, the high-frequency modes (in the range 200–300 cm–1, denoted iMX and oMX), arising from displacements of both the metal and chalcogen atoms, exhibit considerably reduced splittings. The manifold of phonon modes associated with the in-plane and out-of-plane displacements are quantitatively described by a force constant model, including interactions up to the second nearest neighbor and surface effects as fitting parameters. The splittings for the iX and oX modes observed in N-layer crystals are directly correlated to the corresponding bulk Davydov splittings between the E2u/E1g and B1u/A1g modes, respectively, and provide a measurement of the frequencies of the bulk silent E2u and B1u optical phonon modes. Our analysis could readily be generalized to other layered crystals [less ▲]

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See detailUnified Design for Parallel Execution of Coupled Simulations using the Discrete Particle Method
Besseron, Xavier UL; Hoffmann, Florian UL; Michael, Mark UL et al

in Proceedings of the Third International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering (2013)

This paper presents the enhanced design of the Discrete Particle Method (DPM), a simulation tool which provides high quality and fast simulations to solve a broad range industrial processes involving ... [more ▼]

This paper presents the enhanced design of the Discrete Particle Method (DPM), a simulation tool which provides high quality and fast simulations to solve a broad range industrial processes involving granular materials. It enables to resolve mechanical and thermodynamics problems through different simulation modules (motions, chemical conversion). This new design allows to transparently couple the simulation modules in parallel execution. It relies on a unified interface and timebase of the simulation modules and a flexible decomposition in cells of the simulation space. Experimental results study the behavior of the Orthogonal Recursive Bisection (ORB) partitioning algorithm. A good scalability is achieved as the parallel execution on a distributed platform provides a 17-times speedup using 64 processes. [less ▲]

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See detailA unified enrichment approach addressing blending and conditioning issues in enriched finite elements
Agathos, Konstantinos; Chatzi, Eleni; Bordas, Stéphane UL

in Computer Methods in Applied Mechanics and Engineering (2019), 349

We present a combination of techniques to improve the convergence and conditioning properties of partition of unity (PU) enriched finite element methods. By applying these techniques to different types of ... [more ▼]

We present a combination of techniques to improve the convergence and conditioning properties of partition of unity (PU) enriched finite element methods. By applying these techniques to different types of enrichment functions, namely polynomial, discontinuous and singular, higher order convergence rates can be obtained while keeping condition number growth rates similar to the ones corresponding to standard finite elements. [less ▲]

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