References of "2012"
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See detailMetrics for oscillator models: an input-to-phase approach
Sacré, Pierre ULiege; Sepulchre, Rodolphe ULiege

Conference (2012, March)

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See detailDiscrépance et domaines de vie de l’ISQV-E(c) : quels liens avec le mal-être de l’enfant ?
Lemétayer, Fabienne; Lanfranchi, Jean-Baptiste; Missotten, Pierre ULiege et al

in Revue Francophone de Clinique Comportementale et Cognitive (2012), XVII(1), 34-43

This study examines the processes and the life domains of the Child Quality of Life Systemic Inventory (ISQV-E(c) in French - Missotten, Etienne & Dupuis, 2007), involved in the suffering of depressed ... [more ▼]

This study examines the processes and the life domains of the Child Quality of Life Systemic Inventory (ISQV-E(c) in French - Missotten, Etienne & Dupuis, 2007), involved in the suffering of depressed children, assessed with the CDI. These questionnaires were administered to 453 to school age children (8-12 years old) and they all spoke French (273 French, 180 Belgian). An initial analysis was undertaken to verify the nature of the model, additive vs multiplicative, underlying the ISQV-E(c). Five factors were tested: the Goal, the Discrepancy (distance between State and Goal), Speed, Rank and the Gap. Regression analysis revealed that only the Goal and the Discrepancy are significantly related to suffering depression (additive model). From these two factors, a second analysis was performed to account for domains of life most involved in suffering from depression. The results dealt with a PLS path modeling helped to update the 10 domains of life, of the twenty-evaluated by the ISQV-E(c), likely to predict depressive suffering of children. The specific contribution of the ISQV-E(c) is discussed in relation to depressive affect assessed with the CDI. [less ▲]

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See detailOptimale experimentele studies voor functionele MRI
Maus, Bärbel ULiege; van Breukelen, G. J. P.

in STAtOR (2012), 13(1), 23-26

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See detailTreatment of a severe distal forelimb wound presenting with extensive laceration and distal interphalangeal joint luxation in a donkey
Brogniez, L; Launois,T; Perrin R et al

in Pferdeheilkunde (2012), 28(2), 160-166

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See detailEffect of physicochemical characteristics of cellulosic substrates on enzymatic hydrolysis by means of a multi-stage process for cellobiose production
Vanderghem, Caroline ULiege; Jacquet, Nicolas ULiege; Danthine, Sabine ULiege et al

in Applied Biochemistry and Biotechnology (2012), 166(6), 1423-1432

The effect of two types of cellulose, microcrystalline cellulose and paper pulp, on enzymatic hydrolysis for cellobiose production was investigated. The particle size, the relative crystallinity index and ... [more ▼]

The effect of two types of cellulose, microcrystalline cellulose and paper pulp, on enzymatic hydrolysis for cellobiose production was investigated. The particle size, the relative crystallinity index and the water retention value were determined for both celluloses. A previously studied multistage hydrolysis process that proved to enhance the cellobiose production was studied with both types of celluloses. The cellobiose yield exhibited a significant improvement (120% for the microcrystalline cellulose and 75% for the paper pulp) with the multistage hydrolysis process compared to continuous hydrolysis. The conversion of cellulose to cellobiose was greater for the microcrystalline cellulose than for the paper pulp. Even with high crystallinity, microcrystalline cellulose achieved the highest cellobiose yield probably due to its highest specific surface area accessible to enzymes and quantity of adsorbed protein. [less ▲]

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See detailEffects of management regimes and extreme climatic events on plant population viability in Eryngium alpinum
Andrello, Marco; Bizoux, Jean-Philippe ULiege; BARBET-MASSIN, morgane et al

in Biological Conservation (2012), 147(1), 99-106

Extreme climatic events like the 2003 summer heatwave and inappropriate land management can threaten the existence of rare plants. We studied the response of Eryngium alpinum, a vulnerable species, to ... [more ▼]

Extreme climatic events like the 2003 summer heatwave and inappropriate land management can threaten the existence of rare plants. We studied the response of Eryngium alpinum, a vulnerable species, to this extreme climatic event and different agricultural practices. A demographic study was conducted in seven field sites between 2001 and 2010. Stage-specific vital rates were used to parameterize matrix population models and perform stochastic projections to calculate population growth rates and estimate extinction probabilities. Among management regimes, spring grazing and land abandonment decreased vital rates and population growth, while autumn grazing and late mowing had positive effects on population viability. The 2003 heatwave reduced fecundity rates and survival rates. Only spring grazed sites presented considerable extinction risk. Stochastic projections showed that an increased frequency of 2003-like events may exacerbate extinction risk, but extinction probability depends mainly on land management regimes. To better conserve E. alpinum populations, we recommend conversion of presently spring grazed and abandoned sites to late mowing or autumn grazing. [less ▲]

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See detailUn pôle d'excellence wallon en santé articulaire.
Henrotin, Yves ULiege

Article for general public (2012)

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See detailModellierung des Trennverhaltens wässriger Systeme in Packungskolonnen basierend auf tomographischen
Janzen, Anna; Steube, Julia; Aferka, Saïd ULiege et al

Conference (2012, March)

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See detailA preliminary look at the empirical mass distribution of hot B subdwarf stars
Fontaine, Gilles; Brassard, Pierre; Charpinet, Stéphane et al

in Astronomy and Astrophysics (2012), 539

We present the results of about a decade of efforts toward building an empirical mass distribution for hot B subdwarf stars on the basis of asteroseismology. So far, our group has published detailed ... [more ▼]

We present the results of about a decade of efforts toward building an empirical mass distribution for hot B subdwarf stars on the basis of asteroseismology. So far, our group has published detailed analyses pertaining to 16 pulsating B subdwarfs, including estimates of the masses of these pulsators. Given that measurements of the masses of B subdwarfs through more classical methods (such as full orbital solutions in binary stars) have remained far and few, asteroseismology has proven a tool of choice in this endeavor. On the basis of a first sample of 15 pulsators, we find a relatively sharp mass distribution with a mean mass of 0.470 M⊙, a median value of 0.470 M⊙, and a narrow range 0.441−0.499 M⊙ containing some 68.3% of the stars. We augmented our sample with the addition of seven stars (components of eclipsing binaries) with masses reliably established through light curve modeling and spectroscopy. The new distribution is very similar to the former one with a mean mass of 0.470 M⊙, a median value of 0.471 M⊙, and a slightly wider range 0.439−0.501 M⊙ containing some 68.3% of the stars. Although still based on small-number statistics, our derived empirical mass distribution compares qualitatively very well with the expectations of stellar evolution theory. [less ▲]

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See detailAberrant results observed with four immuno-assays for total and free prostate-specific antigen (PSA) determination: a case-report
CAVALIER, Etienne ULiege

in Clinical Chemistry & Laboratory Medicine (2012), 50(3), 583-584

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See detailLa libre circulation des personnes dans et vers l'Union européenne: année 2011
Carlier, Jean-Yves ULiege

in Journal de Droit Européen [=JDE] (2012), 20(187), 85-92

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See detailL'Art d'Investir Avec Internet
Choffray, Jean-Marie ULiege

in Longin, François (Ed.) Gestion de Patrimoine: Clés et Outils (2012)

Ce document constitue la synthèse d’une recherche personnelle menée au cours des dix dernières années, portant sur l’utilisation d’internet en tant que plate-forme d’investissement global. Cette recherche ... [more ▼]

Ce document constitue la synthèse d’une recherche personnelle menée au cours des dix dernières années, portant sur l’utilisation d’internet en tant que plate-forme d’investissement global. Cette recherche m’a amené à observer, conceptualiser et formaliser le comportement dynamique des marchés, des entreprises et des investisseurs. L’objectif de cette synthèse est d’intégrer données (sites internet), concepts, heuristiques et modèles, en un ensemble cohérent de principes opérationnels d’aide à l’investissement. Mon ambition est que ces principes puissent vous aider, comme ils m’ont aidé, à développer des stratégies d’investissement pertinentes au travers d’internet. Avant de les adopter, je vous invite à conserver une attitude critique à leur égard et à les considérer comme autant d’hypothèses à explorer et à valider. [less ▲]

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See detailModèles d'écoulements incompressibles en plan vertical appliqués aux structures du génie civil
Detrembleur, Sylvain ULiege

Doctoral thesis (2012)

Le travail entrepris s’intègre complètement dans la filière d’étude propre au HACH, à savoir une interaction étroite entre modèles numériques et validation sur bases d’éléments issus de la modélisation ... [more ▼]

Le travail entrepris s’intègre complètement dans la filière d’étude propre au HACH, à savoir une interaction étroite entre modèles numériques et validation sur bases d’éléments issus de la modélisation physique. Les hypothèses restrictives du modèle intégré sur la hauteur (WOLF2D) ont été gommées par l’ajout de deux nouveaux modules permettant de calculer explicitement la distribution des variables hydrodynamiques sur la hauteur de l’écoulement. L’utilisation intensive du code bidimensionnel horizontal et les modélisations diverses et variées menées au moyen de ce module ont conduit à de nombreuses implémentations nouvelles dans ce code, permettant de traiter un nombre grandissant de situations complexes. L’utilisation d’un maillage structuré, même différentiable spatialement au moyen d’une technique multiblocs, ne permet cependant pas à l’utilisateur de représenter adéquatement certaines géométries complexes. Il ressort de ce constat que les techniques numériques à même de supprimer cette dépendance ont fait l’objet d’une partie de cette recherche, en permettant l’utilisation de contours quelconques qui ne respectent pas nécessairement la structure cartésienne du maillage. Ces développements ont tout naturellement conduit à la modélisation d’interactions de structures solides sur le fluide. D’autre part, le grand nombre de modèles hydrodynamiques spécifiques implémentés dans le code WOLF2D trahissent une volonté d’intégrer les variations verticales des composantes hydrodynamiques agglomérées par l’intégration sur la hauteur. Ces distributions peuvent, certes, être maîtrisées dans une certaine mesure, mais ne peuvent en aucun cas reproduire la dynamique complexe qui est observée dans la direction d’intégration de ce type de modèle. Par conséquent, la partie principale des recherches entreprises dans cette thèse est concentrée sur le développement d’un modèle bidimensionnel explicitement discrétisé sur la verticale (WOLF2DV) qui permet de combler le manque d’informations distribuées induit lors de l’élaboration d’un modèle bidimensionnel horizontal. L’obtention de ces informations a cependant un coût, puisque la structure et la technique de résolution du système d’équations est différente des modèles intégrés sur la hauteur ou sur la section et engendre des coûts de calcul supplémentaires. Afin de conserver la philosophie générale de la suite logicielle WOLF, qui se veut polyvalente et efficace même sur de grandes applications réelles, un effort considérable a été consenti lors de l’évaluation des techniques de résolution et de leur implémentation et ce, afin de conserver des temps de calcul acceptables. En outre, la volonté de s’affranchir de la discrétisation sur des maillages structurés transparaît également au niveau des recherches entreprises pour ce code explicitement discrétisé sur la verticale puisqu’un second challenge important a consisté en l’élaboration d’une technique de suivi d’interface adaptée. Finalement, les résultats probants et prometteurs fournis ont amené tout naturellement à étendre ce module bidimensionnel vers la troisième dimension et à ainsi représenter explicitement un écoulement tridimensionnel (WOLF3D). Compte tenu de la lourdeur de développement dans la troisième dimension, ce module est limité aux écoulements sous pression et constitue la base de recherches futures qui viseront à adjoindre à ce code une gestion de surface libre ou encore des modèles de turbulence. [less ▲]

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See detailIntroduction. Mise en perspective théorique
Beckers, Jacqueline ULiege

in Beckers, Jacqueline; Crinon, Jacques; Simons, Germain (Eds.) Approche par compétences et réduction des inégalités entre élèves : de l’analyse des situations scolaires à la formation des enseignants (2012)

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See detailIncidence of Abcd1 level on the induction of cell death and organelle dysfunctions triggered by very long chain fatty acids and TNF-alpha on oligodendrocytes and astrocytes
Baarine, Mauhamad; Ragot, Kevin; Athias, Anne et al

in NeuroToxicology (2012), 33(2)

X-linked adrenoleukodystrophy (X-ALD) is characterized by ABCD1 deficiency. This disease is associated with elevated concentrations of very long chain fatty acids (C24:0 and C26:0) in the plasma and ... [more ▼]

X-linked adrenoleukodystrophy (X-ALD) is characterized by ABCD1 deficiency. This disease is associated with elevated concentrations of very long chain fatty acids (C24:0 and C26:0) in the plasma and tissues of patients. Under its severe form, brain demyelination and inflammation are observed. Therefore, we determined the effects of C24:0 and C26:0 on glial cells:oligodendrocytes, which synthesize myelin, and astrocytes, which participate in immune response. So, 158N murine oligodendrocytes, rat C6 glioma cells, rat primary cultures of neuronal–glial cells, and of oligodendrocytes were treated for various periods of time in the absence or presence of C24:0 and C26:0 used at plasmatic concentrations found in X-ALD patients (1–5 μM) and higher (10, 20, 40 μM). To evaluate the importance of extrinsic and intrinsic factors, the part taken by TNF-α and reduced Abcd1 level was studied. Whatever the cells considered, no effects on cell growth and/or viability were detected at 1–5 μM, more or less pronounced effects were identified at 10 μM, and an induction of cell death with increased permeability to propidium iodide and loss of transmembrane mitochondrial potential was observed at 20–40 μM. On 158N, cell death was characterized by (i) an increased superoxide anion production at the mitochondrial level; (ii) the presence of vacuoles of different sizes and shapes; a destabilization of lysosomal membrane and a cytoplasmic redistribution of lysosomes; (iii) a modulation of Abcd3/PMP70 and Acox-1 protein expression, and a decrease in catalase activity at the peroxisomal level. When TNF-α was combined with C24:0 or C26:0 and used on 158N cells, C6 cells, and on 158N cells after siRNA mediated knockdown of Abcd1, no or slight potentiation was revealed. Thus, on the different cell models used, an induction of cell death with marked cellular dysfunctions at the mitochondrial, lysosomal, and peroxisomal levels were found with C24:0 and C26:0 at 20 μM and higher. However, in our experimental conditions, plasmatic concentrations of these fatty acids were unable to induce cell death, and organelle dysfunctions on oligodendrocytes and astrocytes, and additional intrinsic and environmental factors, such as reduced Abcd1 level and/or TNF-α, were ineffective to potentiate their side effects. [less ▲]

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See detailL'influence de la gouvernance familiale sur la transmission de la PME familiale au Sénégal : une modélisation contingente
Van Caillie, Didier ULiege; Mbili Onana,

in COMREFAS - Consortium pour le Management de la Recherche Fondamentale en Afrique au Sud du Sahara (Ed.) Actes du 1er Congrès International en Sciences de Gestion du COMREFAS (2012, March)

In Senegal, family businesses are present in all industries and represent a significant force. Most of family entrepreneurs are between 40 and 50 years old, which show that they will soon face the ... [more ▼]

In Senegal, family businesses are present in all industries and represent a significant force. Most of family entrepreneurs are between 40 and 50 years old, which show that they will soon face the challenge of transmission. To face this challenge and thus to ensure their continuity, it is necessary to ensure the cohesion of family ties, particularly through the family governance. So, our contribution aims, in a contingent perspective and based on a large survey of the existing literature, to a better appraisal of family businesses in Senegal through a better understanding of their family governance practices first, and by understanding the role of family governance on their global performance in order to identify key success factors for a successful family transmission process in the context of Senegal. [less ▲]

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