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See detailVan wildemannen, brave zwartjes en geëvolueerden: Over de mogelijke impact van de Congoconnectie op het Belgische onderwijs
Depaepe, Marc; Vinck, Honoré; Herman, Frederik UL

in Viane, V.; D. Van Reybrouck; Ceuppens, B. (Eds.) Congo in België. Koloniale cultuur in de metropool (2009)

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See detailVanishing gap in LiF for electronic excitations by slow antiprotons
Solleder, Beate; Wirtz, Ludger UL; Burgdörfer, Joachim

in Physical Review B (2009), 79(12),

We study the influence of antiprotons and protons traveling through LiF on the band structure of the insulator using the embedded-cluster method. The crystal is represented by F(m)(-)Li(n)(+) clusters ... [more ▼]

We study the influence of antiprotons and protons traveling through LiF on the band structure of the insulator using the embedded-cluster method. The crystal is represented by F(m)(-)Li(n)(+) clusters with up to 19 fluorine ions embedded in a lattice of point charges representing the remainder of the crystal. The minimum excitation energy of LiF perturbed by the (anti)proton impurity is calculated employing the multiconfiguration self-consistent field method. The repulsive potential of the antiproton causes a dramatic local perturbation of the LiF band structure. We find a strong suppression of the excitation energy by more than an order of magnitude compared to that of the unperturbed crystal. The present results provide a simple explanation of recent stopping-power experiments for antiprotons in LiF which, surprisingly, found a "metal-like" behavior of the wide-band-gap insulator LiF. Our results also agree with recent experimental data indicating a deviation from metallic behavior of the stopping power of proton projectiles. [less ▲]

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See detailThe Vanishing of Low-Dimensional Cohomology Groups of the Witt and the Virasoro algebra
Ecker, Jill Marie-Anne UL; Schlichenmaier, Martin UL

E-print/Working paper (2017)

A proof of the vanishing of the first and the third cohomology groups of the Witt algebra with values in the adjoint module is given. The proofs given in the present article are completely algebraic and ... [more ▼]

A proof of the vanishing of the first and the third cohomology groups of the Witt algebra with values in the adjoint module is given. The proofs given in the present article are completely algebraic and independent of any underlying topology. They are a generalization of the ones provided by Schlichenmaier, who proved the vanishing of the second cohomology group using purely algebraic methods. In the case of the third cohomology group though, extra difficulties arise and the involved proofs are distinctly more complicated. [less ▲]

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See detailVapour phase alkali species for Cu(In,Ga)Se2 solar cells
Berner, Ulrich; Colombara, Diego UL; Bertram, Tobias UL et al

Scientific Conference (2015, September)

Alkalis are essential in Cu(In,Ga)Se2 absorber layers for efficient solar cells. Current doping methods rely on solid state diffusion of an alkali through to the absorber layer, e.g. a thin NaF layer on ... [more ▼]

Alkalis are essential in Cu(In,Ga)Se2 absorber layers for efficient solar cells. Current doping methods rely on solid state diffusion of an alkali through to the absorber layer, e.g. a thin NaF layer on Mo or NaCl dissolved in a metal precursor ink[1]. The apparent concentration of alkali in the final absorber is determined by the initial alkali dosing and the use of an interfacial barrier to stop alkali diffusion from the substrate. Until now the vapor–absorber interface as a source or sink of alkali doping has been largely ignored. We show that device efficiency improves from 2 to 8% by gas phase Na adsorption alone. Conversely initial results show that Na can also be desorbed to the gas phase. Although these efficiencies are lower than those obtained by including Na directly in the precursor (device efficiency 13.3% [1]), the findings are relevant to all chalcogenide growers as they show that exact doping, and thus control of device efficiency, is only possible when gas phase adsorption/desorption processes are controlled. [less ▲]

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See detailVaractor Diodes based on an AlGaN/GaN HEMT layer structure
Marso, Michel UL; Wolter, M.; Bernát, J. et al

in EProc. EDMO (2001)

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See detailVaradhan estimates for diffusions with time dependent coefficients
Schiltz, Jang UL

in Huskova, Marie; Lachout, Petr; Visek, Jan Amos (Eds.) Proceedings of Prague Stochastics 98 (1998)

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See detailVaria
Schafer, Valerie UL; Dablanc, Laetitia

in Flux: Cahiers Scientifiques Internationaux Réseaux et Territoires (2018), 113(3), 121

Au-delà de la diversité des thématiques, espaces et temporalités appréhendés et des méthodologies choisies, les auteurs de ces six Varia partagent, outre leur intérêt pour les territoires, les acteurs et ... [more ▼]

Au-delà de la diversité des thématiques, espaces et temporalités appréhendés et des méthodologies choisies, les auteurs de ces six Varia partagent, outre leur intérêt pour les territoires, les acteurs et le souhait d’analyser finement les outils, débats et enjeux à l’œuvre, un intérêt pour les trajectoires, qu’elles soient décisionnelles et s’appréhendent en termes de gouvernance, ou matérielles et se lisent en termes d’infrastructures. [less ▲]

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See detailVariabilité individuelle d’encodage spatial
Martin, Romain UL; Houssemand, Claude UL

in Flieller, André (Ed.) Questions de psychologie différentielle (2001)

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See detailA Variability Perspective of Mutation Analysis
Devroey, Xavier; Perrouin, Gilles; Cordy, Maxime et al

in Proceedings of the 22nd ACM SIGSOFT International Symposium on the Foundations of Software Engineering (FSE 2014) (2014)

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See detailVariable chemical decoration of extended defects in Cu-poor Cu2ZnSnSe4 thin films
Schwarz, Torsten; Redinger, Alex UL; Siebentritt, Susanne UL et al

in Physical Review Materials (2019), 3

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See detailVariables associated to aging well in poor Peruvian older adults
Tournier, Isabelle UL; Olivera, Javier

Poster (2015)

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See detailVariant PNPLA3 increases the HCC risk: prospective study in patients treated at the Saarland University Medical Center
Casper, Markus; Krawczyk, Marcin; Behrmann, Iris UL et al

in Zeitschrift für Gastroenterologie (2016), 54

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See detailVariant Score Ranker - a web application for intuitive missense variant prioritization
Du, Juanjiangmeng; Sudarsanam, Monica; Pérez-Palma, Eduardo et al

in Bioinformatics (2019)

The correct classification of missense variants as benign or pathogenic remains challenging. Pathogenic variants are expected to have higher deleterious prediction scores than benign variants in the same ... [more ▼]

The correct classification of missense variants as benign or pathogenic remains challenging. Pathogenic variants are expected to have higher deleterious prediction scores than benign variants in the same gene. However, most of the existing variant annotation tools do not reference the score range of benign population variants on gene level. Here, we present a web-application, Variant Score Ranker, which enables users to rapidly annotate variants and perform gene-specific variant score ranking on the population level. We also provide an intuitive example of how gene- and population-calibrated variant ranking scores can improve epilepsy variant prioritization. [less ▲]

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See detailVariant-DB: A Tool for Efficiently Exploring Millions of Human Genetic Variants and Their Annotations
Kutzera, Joachim UL; May, Patrick UL

in Da Silveira, Marcos; Pruski, Cédric; Schneider, Reinhard (Eds.) DILS 2017: Data Integration in the Life Sciences (2017, October 24)

Next Generation Sequencing (NGS) allows sequencing of a human genome within hours, enabling large scale applications such as sequencing the genome of each patient in a clinical study. Each individual ... [more ▼]

Next Generation Sequencing (NGS) allows sequencing of a human genome within hours, enabling large scale applications such as sequencing the genome of each patient in a clinical study. Each individual human genome has about 3.5 Million genetic differences to the so called reference genome, the consensus genome of a healthy human. These differences, called variants, determine individual phenotypes, and certain variants are known to indicate disease predispositions. Finding associations from variant patterns and affected genes to these diseases requires combined analysis of variants from multiple individuals and hence, efficient solutions for accessing and filtering the variant data. We present Variant-DB, our in-house database solution that allows such efficient access to millions of variants from hundreds to thousands of individuals. Variant-DB stores individual variant genotypes and annotations. It features a REST-API and a web-based front-end for filtering variants based on annotations, individuals, families and studies. We explain Variant-DB and its front-end and demonstrate how the Variant-DB API can be included in data integration workflows. [less ▲]

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See detailVariants of early-onset restrictive eating disturbances in middle childhood
Kurz, Susanne; Van Dyck, Zoé UL; Dremmel, Daniela et al

in International Journal of Eating Disorders (2015), 49(1), 102-106

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See detailVarianz und Homogenisierung. Soziopragmatische Aspekte serieller Quellen der Frühen Neuzeit.
Harion, Dominic UL

in Petersen, Niels; Gleba, Gudrun (Eds.) Wirtschafts- und Rechnungsbücher des Mittelalters und der Frühen Neuzeit. (2015)

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See detailVariatio delectat. Empirische Evidenzen und theoretische Passungen sprachlicher Variation
Gilles, Peter UL; Scharloth, Joachim; Ziegler, Evelyn

Book published by Peter Lang (2010)

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See detailVariation and trends in incidence of childhood diabetes in Europe
De Beaufort, Carine UL

in Lancet (2000), 355

BACKGROUND: To study the epidemiology of childhood-onset type 1 insulin-dependent diabetes in Europe, the EURODIAB collaborative group established in 1988 prospective geographically-defined registers of ... [more ▼]

BACKGROUND: To study the epidemiology of childhood-onset type 1 insulin-dependent diabetes in Europe, the EURODIAB collaborative group established in 1988 prospective geographically-defined registers of new cases diagnosed under 15 years of age. This report is based on 16 362 cases registered during the period 1989-94 by 44 centres representing most European countries and Israel and covering a population of about 28 million children. METHODS: Multiple sources of ascertainment were used in most centres to validate the completeness of registration by the capture-recapture method. Trends in incidence during the period were analysed by Poisson regression, the data from centres within each country being pooled. FINDINGS: The standardised average annual incidence rate during the period 1989-94 ranged from 3.2 cases per 100000 per year in the Former Yugoslav Republic of Macedonia to 40.2 cases per 100000 per year in two regions of Finland. By pooling over all centres, the annual rate of increase in incidence was 3.4% (95% CI 2.5-4.4%), but in some central European countries it was more rapid than this. Pooled over centres and sexes, the rates of increase were 6.3% (4.1-8.5%) for children aged 0-4 years, 3.1% (1.5-4.8%) for 5-9 years, and 2.4% (1.0-3.8%) for 10-14 years. INTERPRETATION: The results confirm a very wide range of incidence rates within Europe and show that the increase in incidence during the period varied from country to country. The rapid rate of increase in children aged under 5 years is of particular concern. PMID: 10752702 [PubMed - indexed for MEDLI [less ▲]

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