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See detailVisuo-spatial abilities are key for children’s verbal number skills
Cornu, Véronique UL; Martin, Romain UL; Hornung, Caroline UL

Poster (2017, February 22)

Verbal number skills (i.e. counting and number naming) are milestones in numerical development. The aim of the present study was to clarify the role of different verbal abilities (VA) and visuo-spatial ... [more ▼]

Verbal number skills (i.e. counting and number naming) are milestones in numerical development. The aim of the present study was to clarify the role of different verbal abilities (VA) and visuo-spatial abilities (VSA) in the development of these verbal number skills in kindergarten. We recruited 152 children (mean age: 5.8 years) and administered different measures of VA (e.g. phonological awareness, pseudoword recall) and of VSA (e.g. spatial perception, copying) to assess their contribution to verbal number skills. Firstly, we computed two independent regression models, a “VA only” model explaining 23% of variance, and a “VSA only” model explaining 38% of variance. Adding verbal measures to the “VSA only” model does not lead to a significant increase in R2. Our results show that VSA, rather than VA, contribute to a larger extent to children’s verbal number skills. Intriguingly, the development of verbal number skills builds on VA, but more importantly on VSA. These results are potentially informative for the conception early mathematics interventions. [less ▲]

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See detailVisuo-spatial abilities are key for young children’s verbal number skills
Cornu, Véronique UL; Schiltz, Christine UL; Martin, Romain UL et al

in Journal of Experimental Child Psychology (2018), 166C

Children’s development of verbal number skills (i.e, counting abilities and knowledge of the number names) presents a milestone in mathematical development. Different factors such as visuo-spatial and ... [more ▼]

Children’s development of verbal number skills (i.e, counting abilities and knowledge of the number names) presents a milestone in mathematical development. Different factors such as visuo-spatial and verbal abilities have been discussed to contribute to the development of these foundational skills. To understand the cognitive nature of verbal number skills in young children, the present study assessed the relation of preschoolers’ verbal and visuo-spatial abilities to their verbal number skills. In total, 141 children aged between five and six years participated in the present study. Verbal number skills were regressed on vocabulary, phonological awareness and visuo-spatial abilities, as well as verbal and visuo-spatial working memory in a structural equation model. Only visuo-spatial abilities emerged as a significant predictor of verbal number skills in the estimated model. Our results suggest that visuo-spatial abilities contribute to a larger extent to children’s verbal number skills than verbal abilities. From a theoretical point of view, these results suggest a visuo-spatial, rather than a verbal, grounding of verbal number skills. These results are potentially informative for the conception of early mathematics assessments and interventions. [less ▲]

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See detailVisuo-spatial working memory (VSWM) capacity in mental strategies used with Kohs Block Design Test
Houssemand, Claude UL; Martin, Romain UL; Baldassi, M

Scientific Conference (2007, July)

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See detailVitamin C. Biosynthesis, recycling and degradation in mammals.
Linster, Carole UL; Van Schaftingen, Emile

in FEBS Journal (2007), 274(1), 1-22

Vitamin C, a reducing agent and antioxidant, is a cofactor in reactions catalyzed by Cu(+)-dependent monooxygenases and Fe(2+)-dependent dioxygenases. It is synthesized, in vertebrates having this ... [more ▼]

Vitamin C, a reducing agent and antioxidant, is a cofactor in reactions catalyzed by Cu(+)-dependent monooxygenases and Fe(2+)-dependent dioxygenases. It is synthesized, in vertebrates having this capacity, from d-glucuronate. The latter is formed through direct hydrolysis of uridine diphosphate (UDP)-glucuronate by enzyme(s) bound to the endoplasmic reticulum membrane, sharing many properties with, and most likely identical to, UDP-glucuronosyltransferases. Non-glucuronidable xenobiotics (aminopyrine, metyrapone, chloretone and others) stimulate the enzymatic hydrolysis of UDP-glucuronate, accounting for their effect to increase vitamin C formation in vivo. Glucuronate is converted to l-gulonate by aldehyde reductase, an enzyme of the aldo-keto reductase superfamily. l-Gulonate is converted to l-gulonolactone by a lactonase identified as SMP30 or regucalcin, whose absence in mice leads to vitamin C deficiency. The last step in the pathway of vitamin C synthesis is the oxidation of l-gulonolactone to l-ascorbic acid by l-gulonolactone oxidase, an enzyme associated with the endoplasmic reticulum membrane and deficient in man, guinea pig and other species due to mutations in its gene. Another fate of glucuronate is its conversion to d-xylulose in a five-step pathway, the pentose pathway, involving identified oxidoreductases and an unknown decarboxylase. Semidehydroascorbate, a major oxidation product of vitamin C, is reconverted to ascorbate in the cytosol by cytochrome b(5) reductase and thioredoxin reductase in reactions involving NADH and NADPH, respectively. Transmembrane electron transfer systems using ascorbate or NADH as electron donors serve to reduce semidehydroascorbate present in neuroendocrine secretory vesicles and in the extracellular medium. Dehydroascorbate, the fully oxidized form of vitamin C, is reduced spontaneously by glutathione, as well as enzymatically in reactions using glutathione or NADPH. The degradation of vitamin C in mammals is initiated by the hydrolysis of dehydroascorbate to 2,3-diketo-l-gulonate, which is spontaneously degraded to oxalate, CO(2) and l-erythrulose. This is at variance with bacteria such as Escherichia coli, which have enzymatic degradation pathways for ascorbate and probably also dehydroascorbate. [less ▲]

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See detailVitamin supplementation by gut symbionts ensures metabolic homeostasis in an insect host
Salem, Hassan; Bauer, Eugen UL; Strauss, Anja S. et al

in Proceedings of the Royal Society B : Biological Sciences (2014), 281(1796), 20141838

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See detailLa vitesse de défilement des barres de progression influence-t-elle la perception du temps d’attente ?
Lallemand, Carine UL; Gronier, Guillaume

Scientific Conference (2011, October)

This research focuses on the satisfaction and waiting times perceived by a user during the moments where the interaction between the user and the system is temporarily interrupted (file download, setup of ... [more ▼]

This research focuses on the satisfaction and waiting times perceived by a user during the moments where the interaction between the user and the system is temporarily interrupted (file download, setup of a program, etc.). These waiting times are often sources of anxiety and irritation. They go usually with the presentation of an animated progress bar. The objective of this research is to study the impact of different variable-rate progress bars by varying the speed of scrolling. Thus, we are interested in the effects of acceleration and deceleration between progress bars positions. The results confirm the existence of a causal link between perception of waiting time and satisfaction. In addition, a progress bar with a decelerating speed is significantly more appreciated by the users. The results may provide valuable information for the design of computer interfaces. [less ▲]

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See detailViva vox iuris - oder die juridische Stimme der Literatur. Kafkas Der Proceß und Hoffmanns Der Sandmann im Spiegel der dogmatischen Anthropologie Pierre Legendres
Becker, Katrin UL

Doctoral thesis (2015)

The doctoral dissertation “Viva vox iuris” is aimed at extending the research on law and literature by developping a new perspective, based on Pierre Legendre’s “dogmatic anthropology”. Starting with an ... [more ▼]

The doctoral dissertation “Viva vox iuris” is aimed at extending the research on law and literature by developping a new perspective, based on Pierre Legendre’s “dogmatic anthropology”. Starting with an overview of the current state of research in this field, and based on a detailed presentation of Legendre’s theory, the dissertation develops the hypothesis that the deep entanglement of law and literature confers upon literature the capacity of either reinforcing the effectivity of cultural normativity, or of influencing it in the sense of a modificatory force. The plausibility of this hypothesis is then assessed by a thorough analysis of Kafka’s The Trial and Hoffmann’s The Sandman. The Trial is presented as being a novel that stages the failure of interpretation on the diegetic, hermeneutic as well as the production level, i.e. with regard to the author (– interpretation being, from Legendre’s perspective, the fundamental cultural technique assuring a non-delusional human existence). Being confronted with this failure and the consequent lack of a regime of sense, the reader gains insight, ex negativo, into the necessity of being inscribed, by way of interpretation, into an order of Reference that needs to be mediated by literature and law. With regard to The Sandman, the dissertation undertakes to show, through a combination of the concept of testimony with the dogmatic-anthropological core concepts of alterity and representation, how the fantastical blurring of the limits between reality and fiction, as staged in the novel, provides insights into the contingency of the fundamental structure of the normative order of cultural and subjective identity. [less ▲]

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See detailVivas in deo. Die Graffiti der frühchristlichen Kirchenanlage in Trier
Binsfeld, Andrea UL

Book published by Bischöfliches Dom- und Diözesanmuseum (2006)

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See detailVivre à domicile, deux ans après un AVC : Etude auprès des patients et des aidants du Luxembourg.
Baumann, Michèle UL

Presentation (2012)

Au Luxembourg, une recherche pluridisciplinaire a été réalisée auprès de 797 personnes victimes d’un accident vasculaire cérébral (AVC). Une enquête nationale a été menée comportant un volet ... [more ▼]

Au Luxembourg, une recherche pluridisciplinaire a été réalisée auprès de 797 personnes victimes d’un accident vasculaire cérébral (AVC). Une enquête nationale a été menée comportant un volet épidémiologique effectué par le CRP-Santé, qui a rassemblé des données médico-administratives et des données cliniques issues des dossiers d’hospitalisation, et un volet de sociologie médicale par l’Université qui a interrogé 94 patients vivant au domicile, deux après la survenue de l’AVC, et leurs 62 aidants informels principaux. Des recommandations majeures de santé publique et de politiques sociales peuvent être formulées sur la nécessité de mettre en place : 1) un système de surveillance des AVC, indispensable pour orienter les politiques de santé en termes de promotion, prévention et intervention; 2) une filière de soins AVC plus visible, mieux structurée et coordonnée; 3) un suivi social et éducatif par un « gestionnaire des familles AVC » (patients, mais aussi et surtout aidants) et des aides financières pour développer un véritable soutien à domicile à moyen et long terme; 4) une prévention primaire en faveur des aidants que les souffrances physiques, psychiques et la faible qualité de vie sociale amènent à devenir une « population à risque » du système de santé, situation qui touche directement, ou sera susceptible de concerner dans un avenir proche, la plus grande partie d'entre nous. [less ▲]

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See detailVivre sur la frontière. Identités et représentations des transfrontaliers
Wille, Christian UL

Presentation (2011, April)

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See detailVizBin - an application for reference-independent visualization and human-augmented binning of metagenomic data
Laczny, Cedric Christian UL; Sternal, Tomasz; Plugaru, Valentin UL et al

in Microbiome (2015)

Background Metagenomics is limited in its ability to link distinct microbial populations to genetic potential due to a current lack of representative isolate genome sequences. Reference-independent ... [more ▼]

Background Metagenomics is limited in its ability to link distinct microbial populations to genetic potential due to a current lack of representative isolate genome sequences. Reference-independent approaches, which exploit for example inherent genomic signatures for the clustering of metagenomic fragments (binning), offer the prospect to resolve and reconstruct population-level genomic complements without the need for prior knowledge. Results We present VizBin, a Java™-based application which offers efficient and intuitive reference-independent visualization of metagenomic datasets from single samples for subsequent human-in-the-loop inspection and binning. The method is based on nonlinear dimension reduction of genomic signatures and exploits the superior pattern recognition capabilities of the human eye-brain system for cluster identification and delineation. We demonstrate the general applicability of VizBin for the analysis of metagenomic sequence data by presenting results from two cellulolytic microbial communities and one human-borne microbial consortium. The superior performance of our application compared to other analogous metagenomic visualization and binning methods is also presented. Conclusions VizBin can be applied de novo for the visualization and subsequent binning of metagenomic datasets from single samples, and it can be used for the post hoc inspection and refinement of automatically generated bins. Due to its computational efficiency, it can be run on common desktop machines and enables the analysis of complex metagenomic datasets in a matter of minutes. The software implementation is available at https://claczny.github.io/VizBin under the BSD License (four-clause) and runs under Microsoft Windows™, Apple Mac OS X™ (10.7 to 10.10), and Linux. [less ▲]

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See detailVladimír Mandl
Hofmann, Mahulena UL; Kopal, Vladimír

in Hobe, Stephan (Ed.) Pioneers of Space Law (2013)

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See detailVOC-T – Vokabular und Overclaiming-Test
Ziegler, M.; Bensch, D.; Kemper, Christoph UL

in Kemper, Christoph; Brähler, E.; Zenger, M. (Eds.) Psychologische und sozialwissenschaftliche Kurzskalen – Standardisierte Erhebungsinstrumente für Wissenschaft und Praxis (2013)

Detailed reference viewed: 63 (1 UL)
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See detailThe Vocabulary and Overclaiming Test (VOC-T)
Ziegler, M.; Kemper, Christoph UL; Rammstedt, B.

Scientific Conference (2012, July)

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See detailThe Vocabulary and Overclaiming Test (VOC-T)
Ziegler, M.; Kemper, Christoph UL; Rammstedt, B.

in Journal of Individual Differences (2013)

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See detailThe vocabulary of Learner-Space Interactions - Understanding learning spaces experience through the repertory grid method
Lallemand, Carine UL; Koenig, Vincent UL

in Interaction Design & Architecture(s) (2017), 32

Higher education institutions are facing new educational challenges and are striving for an evolution in pedagogical practices. This evolution is accompanied by the need for innovative learning spaces to ... [more ▼]

Higher education institutions are facing new educational challenges and are striving for an evolution in pedagogical practices. This evolution is accompanied by the need for innovative learning spaces to support students in the development of “21st century skills”. Designing these spaces requires a deep understanding of learners’ needs and experiences. User-centered design therefore appears as an adequate process to understand learning experiences in relation to spatial design. In this paper, we describe how the repertory grid method has been used to explore students’ perceptions of learning environments (N = 26). We identified 381 personal constructs (contrasted word pairs) associated with learning spaces and grouped them into seven categories (22 subcategories), ranked by number of occurrences. This study provides a basis for the development of a vocabulary of learners-spaces interactions, in support of the design and assessment of learning space experiences. [less ▲]

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See detailVoeux du paon et Voeux de l'épervier. L'empereur et ses "meilleurs chevaliers" dans la culture courtoise entre Metz, Bar et Luxembourg (début XIVe siècle)
Margue, Michel UL

in Chazan, Mireille; Freeman Regalado, Nancy (Eds.) Lettres, musique et société en Lorraine médiévale. Autour du Tournoi de Chauvency (MS Oxford, Bodl. Douce 308) (2012)

Detailed reference viewed: 115 (2 UL)
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See detailLes "voeux sur les oiseaux". Mutations d'un rite d'intégration entre mémoire chevaleresque et actualité politique
Margue, Michel UL

in Guenée, Bernard; Moeglin, Jean-Marie (Eds.) Relations, échanges, transferts en Occident au cours des derniers: hommage à Werner Paravicini ; Actes du colloque de Paris (4-6 décembre 2008) (2010)

Detailed reference viewed: 23 (0 UL)