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See detail8pi-periodic Josephson effect in time-reversal invariant interacting Rashba nanowires
Pedder, Christopher UL; Meng, Tobias; Tiwari, Rakesh et al

E-print/Working paper (2015)

We investigate narrow quantum wires with strong Rashba spin-orbit coupling and electron-electron interactions. We show that virtual transitions between subbands lead to umklapp scattering which can open a ... [more ▼]

We investigate narrow quantum wires with strong Rashba spin-orbit coupling and electron-electron interactions. We show that virtual transitions between subbands lead to umklapp scattering which can open a partial gap in the spectrum even in the presence of time-reversal symmetry. Using the superconducting proximity effect to gap out the remaining modes, we show that the system can host zero-energy states at its edges, which are protected by time-reversal symmetry. We present the parameter regime in which these bound states will emerge. Similarly to Majorana bound states, they will produce a zero-bias peak in the differential conductance. In contrast to the Majorana fermions, however, their fourfold degeneracy leads to an 8π periodicity of the Josephson current due to tunneling of fractionalized excitations with charge e/2. [less ▲]

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See detailThe 8th International Comparison of Absolute Gravimeters 2009: the first Key Comparison (CCM.G-K1) in the field of absolute gravimetry
Jiang, Z.; Pálinkáš, V.; Arias, F. E. et al

in Metrologia (2012), 49(6), 666

The 8th International Comparison of Absolute Gravimeters (ICAG2009) took place at the headquarters of the International Bureau of Weights and Measures (BIPM) from September to October 2009. It was the ... [more ▼]

The 8th International Comparison of Absolute Gravimeters (ICAG2009) took place at the headquarters of the International Bureau of Weights and Measures (BIPM) from September to October 2009. It was the first ICAG organized as a key comparison in the framework of the CIPM Mutual Recognition Arrangement of the International Committee for Weights and Measures (CIPM MRA) (CIPM 1999). ICAG2009 was composed of a Key Comparison (KC) as defined by the CIPM MRA, organized by the Consultative Committee for Mass and Related Quantities (CCM) and designated as CCM.G-K1. Participating gravimeters and their operators came from national metrology institutes (NMIs) or their designated institutes (DIs) as defined by the CIPM MRA. A Pilot Study (PS) was run in parallel in order to include gravimeters and their operators from other institutes which, while not signatories of the CIPM MRA, nevertheless play important roles in international gravimetry measurements. The aim of the CIPM MRA is to have international acceptance of the measurement capabilities of the participating institutes in various fields of metrology. The results of CCM.G-K1 thus constitute an accurate and consistent gravity reference traceable to the SI (International System of Units), which can be used as the global basis for geodetic, geophysical and metrological observations of gravity. The measurements performed afterwards by the KC participants can be referred to the international metrological reference, i.e. they are SI-traceable. The ICAG2009 was complemented by a number of associated measurements: the Relative Gravity Campaign (RGC2009), high-precision levelling and an accurate gravity survey in support of the BIPM watt balance project. The major measurements took place at the BIPM between July and October 2009. Altogether 24 institutes with 22 absolute gravimeters (one of the 22 AGs was ultimately withdrawn) and nine relative gravimeters participated in the ICAG/RGC campaign. This paper is focused on the absolute gravity campaign. We review the history of the ICAGs and present the organization, data processing and the final results of the ICAG2009. After almost thirty years of hosting eight successive ICAGs, the CIPM decided to transfer the responsibility for piloting the future ICAGs to NMIs, although maintaining a supervisory role through its Consultative Committee for Mass and Related Quantities. [less ▲]

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See detail90Sr, 210Pb, 210Po and Ra isotopes in marine macroalgae and mussel Mytilus galloprovincialis from the Bulgarian Black Sea zone
Tosheva, Zornitza UL; Nonova, Tzvetana

in Journal of Radioanalytical & Nuclear Chemistry (2015)

90Sr, 210 Pb, 210Po and Ra isotopes were determined in macroalgae Ceramium rubrum, Cystoseira crinita, Ulva rigida, Cladophora vagabunda, Enteromor- pha intestinalis and in mussels Mytilus ... [more ▼]

90Sr, 210 Pb, 210Po and Ra isotopes were determined in macroalgae Ceramium rubrum, Cystoseira crinita, Ulva rigida, Cladophora vagabunda, Enteromor- pha intestinalis and in mussels Mytilus galloprovincialis collected from the Bulgarian Black Sea coast. Radio- chemical separation was made by a fast and reproducible procedure based on a calcium phosphate precipitation technique. The obtained results for macroalgae vary in the interval 0.23–0.85 Bq kg-1 for 90Sr, 2.2–10.6 Bq kg-1 for 210Pb, 1.2–9.7 Bq kg-1 for 210Po and 1.9–13.2 Bq kg-1 for Ra isotopes. Data obtained for mussels demonstrate similar abilities in the accumulation of 90Sr, 210Pb and Ra isotopes. [less ▲]

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See detail9th Conference on Geometry and Topology of Manifolds
Poncin, Norbert UL

Report (2008)

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See detailA büntetőjogi szankciórendszer reformja
Ligeti, Katalin UL

in Kriminológiai Közlemények (2007)

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See detailA che cosa aspirano i giovani adulti in Svizzera per il loro avvenire?
Samuel, Robin UL; Bergman, Manfred Max

Article for general public (2015)

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See detailA fiatalkorú elítéltek áldozati minőségének vizsgálata
Ligeti, Katalin UL; Végvári, Réka; Schmidt, Andrea et al

Book published by OBMB Budapest (2008)

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See detailA la croisée des chemins: Nationalité et citoyenneté
Scuto, Denis UL

Article for general public (2015)

Weekly column on contemporary history ("L'histoire du temps présent") in Luxembourg newspaper Tageblatt, here on the history of the link between citizenship as right to vote and nationality in Luxembourg

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See detailA la Découverte du Goût: Conclusions et synthèse du colloque
Reckinger, Rachel UL

Presentation (2010, February)

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See detailA la recherche d'une "action directe" en droit allemand des obligations et des assurances
Corbisier, Isabelle UL

in Fontaine, Marcel; Ghestin, Jacques (Eds.) Les effets du contrat à l'égard des tiers (1992)

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See detailA la recherche des constructions d'identité
Reckinger, Rachel UL; Wille, Christian UL

in IPSE – Identités, Politiques, Sociétés (Ed.) Construire des identités au Lxembourg. Appropriations subjectives – Projections institutionnelles – Milieux socio-culturels (2011)

Le Luxembourg – un centre financier international, un centre administratif européen, une terre d’immigration ? Cette étude empirique propose quelques approches d’une société jusqu’à présent en grande ... [more ▼]

Le Luxembourg – un centre financier international, un centre administratif européen, une terre d’immigration ? Cette étude empirique propose quelques approches d’une société jusqu’à présent en grande partie éludée par la recherche scientifique et observe les processus de construction identitaire dans des conditions de globalisation. L’équipe interdisciplinaire des auteurs expose les processus d’appropriation subjective et de projection institutionnelle à l’œuvre dans le domaine des langues, des espaces, des perceptions de soi-même et des autres, mais également dans les cultures du quotidien. Elle identifie pour la première fois des milieux socioculturels du Grand-Duché. Les découvertes faites à l’issue de ce projet de recherche d’une durée de trois ans mettent au jour les ambivalences et les dynamiques d’une société multiculturelle et plurilingue. Dans l’Unité de Recherche IPSE (Identités. Politiques, Sociétés, Espaces) à l’Université du Luxembourg, les chercheurs s’intéressent à des thèmes qui ont une pertinence sociale. L’accent est mis plus particulièrement sur l’analyse de processus de construction d’identités sociales et culturelles. [less ▲]

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See detailA la recherche du devoir de conseil en gestion individuelle de portefeuille
Riassetto, Isabelle UL

in Bulletin Joly Bourse (2012)

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See detailA la rencontre de Lev Vygotsky
Reuter, Bob UL

Book published by Robert Reuter (2007)

Ce livre est issu d’un projet pédagogique réalisé au second semestre de l’année académique 2006-2007 par des étudiantes et étudiants de l’Université du Luxembourg, dans le cadre du deuxième module ... [more ▼]

Ce livre est issu d’un projet pédagogique réalisé au second semestre de l’année académique 2006-2007 par des étudiantes et étudiants de l’Université du Luxembourg, dans le cadre du deuxième module : «Introducing Vygotsky (1896-1934): Mediation and the ZPD» de l’unité d’apprentissage «Learning as a social and cultural practice» du programme d’études du Bachelor Professionnel en Sciences de l’Education (BPSE), dispensé par la Faculté des Lettres, des Sciences Humaines, des Arts et des Sciences de l'Education. Il contient des contributions originales sur des thèmes variés du domaine de la psychologie des apprentissages, du développement et de l'éducation. [less ▲]

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See detailA meshless adaptive multiscale method for fracture
Yang, S.-W.; Budarapu, P. R.; Mahapatra, D. R. et al

in Computational Materials Science (2015), 96(PB), 382-395

The paper presents a multiscale method for crack propagation. The coarse region is modelled by the differential reproducing kernel particle method. Fracture in the coarse scale region is modelled with the ... [more ▼]

The paper presents a multiscale method for crack propagation. The coarse region is modelled by the differential reproducing kernel particle method. Fracture in the coarse scale region is modelled with the Phantom node method. A molecular statics approach is employed in the fine scale where crack propagation is modelled naturally by breaking of bonds. The triangular lattice corresponds to the lattice structure of the (1 1 1) plane of an FCC crystal in the fine scale region. The Lennard-Jones potential is used to model the atom-atom interactions. The coupling between the coarse scale and fine scale is realized through ghost atoms. The ghost atom positions are interpolated from the coarse scale solution and enforced as boundary conditions on the fine scale. The fine scale region is adaptively refined and coarsened as the crack propagates. The centro symmetry parameter is used to detect the crack tip location. The method is implemented in two dimensions. The results are compared to pure atomistic simulations and show excellent agreement. [less ▲]

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See detailA Mindfulness-Based Group Intervention for Enhancing Self-Regulation of Emotion in Late Childhood and Adolescence: A Pilot Study
Deplus, S.; Billieux, Joël UL; Scharff, C. et al

in International Journal of Mental Health and Addiction (2016), 14(5), 775-790

Emotion dysregulation is strongly implicated in the development of psychological problems during adolescence. The purpose of this study was to examine the feasibility and acceptability of an intervention ... [more ▼]

Emotion dysregulation is strongly implicated in the development of psychological problems during adolescence. The purpose of this study was to examine the feasibility and acceptability of an intervention for enhancing self-regulation of emotion in adolescents, adapted from Mindfulness-based Cognitive Therapy. We studied the impact of the intervention on depressive symptoms, as well as on transdiagnostic psychological processes related to emotional regulation, namely impulsivity and ruminative thinking. Twenty-one participants aged between 11 and 19 years were offered a nine-session group intervention. Adolescents completed standardized questionnaires before and after the training. This intervention was found to increase self-reported mindfulness and was well-accepted by adolescents, as estimated by the low dropout rate. As expected, a decrease was observed in depressive symptoms, in specific impulsivity facets (urgency and lack of perseverance), and in internal-dysfunctional strategies of emotion regulation (especially in unconstructive repetitive thoughts). The present findings provide preliminary support for a group intervention for adolescents characterized by emotion regulation difficulties, targeting transdiagnostic psychological processes (impulsivity and ruminative thinking). Furthermore, by potentially enhancing self-regulation skills, this intervention might constitute an effective method for general prevention of psychological disorders in late childhood and adolescence. © 2016, Springer Science+Business Media New York. [less ▲]

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See detail"A Noble Animal" : Animalische und andere Tiere in D. H. Lawrence' "St. Mawr"
Kohns, Oliver UL

in Doll, Martin; Kohns, Oliver (Eds.) Politische Tiere : Zoologie des Kollektiven (2017)

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See detailA phenotypic screen in zebrafish identifies a novel small-molecule inducer of ectopic tail formation suggestive of alterations in non-canonical Wnt/PCP signaling
Gebruers, E.; Cordero-Maldonado, M. L.; Gray, A. I. et al

in PLoS ONE (2013), 8(12),

Zebrafish have recently emerged as an attractive model for the in vivo bioassay-guided isolation and characterization of pharmacologically active small molecules of natural origin. We carried out a ... [more ▼]

Zebrafish have recently emerged as an attractive model for the in vivo bioassay-guided isolation and characterization of pharmacologically active small molecules of natural origin. We carried out a zebrafish-based phenotypic screen of over 3000 plant-derived secondary metabolite extracts with the goal of identifying novel small-molecule modulators of the BMP and Wnt signaling pathways. One of the bioactive plant extracts identified in this screen - Jasminum gilgianum, an Oleaceae species native to Papua New Guinea - induced ectopic tails during zebrafish embryonic development. As ectopic tail formation occurs when BMP or non-canonical Wnt signaling is inhibited during the tail protrusion process, we suspected a constituent of this extract to act as a modulator of these pathways. A bioassay-guided isolation was carried out on the basis of this zebrafish phenotype, identifying para-coumaric acid methyl ester (pCAME) as the active compound. We then performed an in-depth phenotypic analysis of pCAME-treated zebrafish embryos, including a tissue-specific marker analysis of the secondary tails. We found pCAME to synergize with the BMP-inhibitors dorsomorphin and LDN-193189 in inducing ectopic tails, and causing convergence-extension defects in compound-treated embryos. These results indicate that pCAME may interfere with non-canonical Wnt signaling. Inhibition of Jnk, a downstream target of Wnt/PCP signaling (via morpholino antisense knockdown and pharmacological inhibition with the kinase inhibitor SP600125) phenocopied pCAME-treated embryos. However, immunoblotting experiments revealed pCAME to not directly inhibit Jnk-mediated phosphorylation of c-Jun, suggesting additional targets of SP600125, and/or other pathways, as possibly being involved in the ectopic tail formation activity of pCAME. Further investigation of pCAME's mechanism of action will help determine this compound's pharmacological utility. © 2013 Gebruers et al. [less ▲]

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