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See detailClostridium difficile: méthodes de diagnostic microbiologique.
HUYNEN, Pascale ULg

Conference (2012, November 20)

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See detailHow Cristiano Ronaldo performs his knuckleball?
Cohen, Caroline; Darbois-Texier, Baptiste ULg; Quéré, David et al

Conference (2012, November 19)

A soccer ball kicked at very low spin can exhibit a zigzag trajectory. Along its straight path, the ball deviates laterally from about 0.2 m, that is to say one ball diameter. One zig zag happens as the ... [more ▼]

A soccer ball kicked at very low spin can exhibit a zigzag trajectory. Along its straight path, the ball deviates laterally from about 0.2 m, that is to say one ball diameter. One zig zag happens as the ball travelled about 15 m. As the deviation direction seems unpredictable, this effect is highly annoying for goalkeepers. That why Cristiano Ronaldo and many soccer players are looking for this phenomenon. Those trajectories called knuckleballs are also observed on volleyball and baseball. We study experimentally indoor knuckleballs for different balls varying from soccer balls to smooth spheres. We show that knuckle effect doesn't derive from ball deformations at foot impact or ball seams. Actually, aerodynamic lift forces on a smooth sphere are fluctuating and are responsible for knuckleballs. From this study, we deduce side force intensity exerted on smooth spheres and sport balls for typical game Reynolds number (Re∼10^4−10^6). Finally we discuss required conditions to observe a knuckleball on the sport field. [less ▲]

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See detailWhy historical east deviation experiments are so difficult to perform?
Darbois-Texier, Baptiste ULg; Cohen, Caroline

Conference (2012, November 19)

From the 17th to the 19th century, a big deal was to prove Earth rotation existence. For this purpose, numerous experimental physicists from Borelli in 1668 to Reich in 1832 tried to measure an eastward ... [more ▼]

From the 17th to the 19th century, a big deal was to prove Earth rotation existence. For this purpose, numerous experimental physicists from Borelli in 1668 to Reich in 1832 tried to measure an eastward deviation of a falling sphere. Reich performed 106 falling experiments on a 158.5 m deep mine pit. The mean eastward deviation of its experiments is 2.8 cm. This value corresponds exactly with the theoretical one predicted by Laplace and Gauss expression at Freiberg latitude where experiments were conducted. While Reich took extreme precautions to perform its experiments, the dispersion on its results is very important. Actually aerodynamic lift forces on a smooth sphere made its free fall non perfectly straight. We understand Reich's results dispersion considering fluctuating lift forces intensity on a smooth sphere at those Reynolds numbers (Re∼10^4−10^5). This study provides a criterion above which we can distinguish between lift force and Coriolis deviation during a free fall experiment. [less ▲]

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See detailQuels patients risquent de ne pas reprendre le travail ?
Mairiaux, Philippe ULg

Conference (2012, November 17)

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See detailDe deux à trois... Transition à la parentalité et alliances familiales dans les familles lesboparentales.
Miscioscia, Marina ULg; D'Amore, Salvatore ULg; Delvoye, Marie

Conference (2012, November 17)

Le présent travail s’intéresse au moment particulier du cycle de vie familial dénommé "transition à la parentalité". Les études ayant approfondi ce moment délicat ont souligné la nécessité d’adopter une ... [more ▼]

Le présent travail s’intéresse au moment particulier du cycle de vie familial dénommé "transition à la parentalité". Les études ayant approfondi ce moment délicat ont souligné la nécessité d’adopter une perspective multifactorielle et procédurale pour une meilleure compréhension du système en voie de développement (Belsky, 1984). Deux principaux facteurs d'étude ont été déterminés : a) le développement des compétences interactives de la famille, la capacité du couple à organiser des modèles interactifs triadiques pendant la grossesse et de les réorganiser successivement dans la relation avec l'enfant; b) les caractéristiques propre à l'enfant, par exemple le tempérament, sont des facteurs pouvant influencer le développement des compétences interactives précoces ainsi que le style de parenting. Ces aspects ont été amplement étudiés au sein des familles hétéroparentales (Fivaz et al. 2001, Favez et al. 2010, McHale et al. 2001) mais très peu au sein des familles homoparentales (D’Amore et al., 2011). La plupart des recherches se sont intéressées à une comparaison du développement de l'enfant dans de ces deux types de familles, et ce sur différentes dimensions telles que la qualité des relations parent-enfant; le développement cognitif; le développement psycho-social; et l'identité de genre (Vecho & Schneider 2005). Nous proposons ici de présenter la situation d’une famille, issue de la recherche longitudinale que nous effectuons actuellement au sein du Service de Clinique Systémique et Psychopathologie Relationnelle de l’Université de Liège. Notre exposé présentera deux étapes de la passation du Lausanne Trilogue Play: prénatale au 7° mois de grossesse et postnatale au 3° mois de vie de l’enfant (Fivaz-Depeursinge, & Corboz-Warnery, 1999). Nous observerons l’intérêt de cette procédure du LTP prénatal en tant qu’instrument prédictif des capacités parentales à agir leurs compétences interactives à la naissance de l'enfant, vérifiées par la procédure du LTP postnatal. [less ▲]

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See detailPertes et reconstructions identitaires au sein des familles monoparentales et recomposées. La question des spécificités processuelles.
Bullens, Quentin ULg

Conference (2012, November 17)

De nombreuses études se sont intéressées au devenir des familles monoparentales et recomposées, bref des familles ayant connu une situation de séparation, en les comparant aux familles dites intactes. Si ... [more ▼]

De nombreuses études se sont intéressées au devenir des familles monoparentales et recomposées, bref des familles ayant connu une situation de séparation, en les comparant aux familles dites intactes. Si ces études permettent de soulever certaines difficultés possibles dans ces systèmes séparés, elles passent cependant à côté de la spécificité de ces familles qui ne sont pas en tout point comparables aux familles intactes. C'est pourquoi nous proposons une étude qualitative clinique autour de la rencontre avec des familles monoparentales et recomposées qui, au travers d'une approche relative à la Grounded Theory Methodology (Glaser & Strauss, 1967), vise à permettre la mise en évidence du parcours spécifique de ces systèmes. Nous nous interrogeons alors sur l'articulation qui peut être envisagée entre frontières familiales, et notamment la notion d'ambiguïté (Boss, 1999), et la gestion de ce qui peut s'apparenter à une perte mais que nous pouvons déjà dire qui s'en décale et appelle à être défini. Nous nous intéressons alors également à la qualité relationnelle de ces systèmes au travers l'utilisation d'un outil interactionnel: le jeu du pique-nique (Frascarolo-Moutinot & Favez, 2005). Une dialectique s'installe entre l'adéquation de l'outil et la spécificité des systèmes étudiés, pouvant tantôt interroger la pertinence de l'outil, tantôt utiliser ses nombreux apports. A l'heure actuelle, nous avons recueilli des informations (entretien, échelles, JPN) sur une petite dizaine de familles qui nous permettent de nous arrêter afin de déterminer les premiers codages et analyses de ces résultats. [less ▲]

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See detailLa Transition à la parentalité chez les couples homosexuels : étude exploratoire
Fossoul, Charlotte; D'Amore, Salvatore ULg; Miscioscia, Marina ULg et al

Conference (2012, November 17)

La transition à la parentalité est un processus-clé pour comprendre le développement des relations familiales selon une perspective systémique. Ce processus a surtout été étudié chez les familles ... [more ▼]

La transition à la parentalité est un processus-clé pour comprendre le développement des relations familiales selon une perspective systémique. Ce processus a surtout été étudié chez les familles hétérosexuelles et très peu d’études portent sur les familles avec des parents de même sexe. Quelles sont les spécificités de la transition à la parentalité chez les familles homoparentales ? Quelles différences existe-t-il parmi elles selon leur mode de procréation ? Quelles ressources mais aussi quelles difficultés expérimentent-elles au cours de la transition à la parentalité ? Cette étude exploratoire analysera les passages clés de cette transition parmi un échantillon de 30 familles homoparentales (13 recomposées et 17 dont un parent a eu recours à l’insémination artificielle) et cela, à travers une analyse quantitative des données sociodémographiques, des informations relatives au coming-out, à la formation du couple, au projet d’enfant, à l’arrivée de l’enfant ainsi qu’aux pressions sociales et culturelles vis-à-vis de la famille et des facteurs stressants. Les résultats obtenus permettent de faire ressortir certaines lignes directrices dans la construction de la transition à la parentalité chez les familles homoparentales ainsi que des ressemblances et différences entre les familles homoparentales issues de recompositions familiales et d’inséminations artificielles. [less ▲]

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See detailImpact des facteurs socioéconomiques et culturels pour la mise en place de guidance parentale logopédique
Maillart, Christelle ULg; Al mounajjed, Mayada; D’Harcour, Elisabeth et al

Conference (2012, November 16)

Le renforcement des stratégies communicatives des parents (reformulation, étayage, imitation, etc.) est un pilier important des interventions langagières précoces en logopédie. Une récente méta-analyse ... [more ▼]

Le renforcement des stratégies communicatives des parents (reformulation, étayage, imitation, etc.) est un pilier important des interventions langagières précoces en logopédie. Une récente méta-analyse (Roberts & Kaiser, 2011) a étudié les effets des interventions langagières implémentées par les parents en cas de retard langagier chez de jeunes enfants entre 18 mois et 60 mois. La revue confirme l’efficacité de ce type d’intervention écologique et naturelle tant pour le développement du langage expressif que réceptif. Néanmoins, les auteurs signalent que dans la grande majorité des études actuellement publiées le public ayant participé à ces programmes peut être caractérisé comme étant d’un niveau socio-économique moyen. Les milieux socio-économiquement faibles ou multilingues ont été peu étudiés. Paradoxalement, ces milieux sont particulièrement à risque en termes de troubles de développement langagier. Il apparaît également que les dispositifs mis en place dans des milieux socio-économiques moyens ne peuvent pas être simplement transférés et généralisés à des populations différentes. Les résultats d’une étude (Yoder & Warren, 2001) menée sur des interventions en communication pré-linguistique (c.à.d. concernant des enfants qui parlent peu) ont montré que le niveau socio-économique des mères influençait l’efficacité des techniques utilisées. Ainsi, les enfants dont les mères avaient un plus faible niveau socio-économique bénéficiaient davantage d’interventions dans lesquelles les adultes suivaient leurs initiatives et répondaient à leurs tentatives de communications alors que les interventions basées sur l’imitation langagière se révélaient moins efficaces. Dans cette communication, nous présenterons le dispositif d’intervention langagière d’une recherche-action menée par des logopédistes dans des consultations « parent/enfant » gratuites organisées des populations défavorisées et multilingues. Ce projet pilote a nécessité une réflexion quant à l’influence des variables suivantes : mobilisation parentale (Dans des actions de prévention inscrites sur dans la durée, comment motiver des parents peu demandeurs quant au développement langagier?), ajustement des techniques proposées (Comment tenir compte des facteurs multiculturels dans des interventions précoces ?), disponibilité parentale (Comment impliquer les parents et les inscrire dans un suivi régulier ?), implication des travailleurs sociaux (Comment associer à ce travail des travailleurs sociaux non spécifiquement formés dans le domaine du langage mais qui sont un relai précieux en famille ?). La recherche-action concerne environ 200 enfants, répartis semi-aléatoirement entre des activités d ‘éveil psychomoteur (groupe contrôle) ou de stimulation langagière (groupe expérimental). Cet exposé se ciblera particulièrement sur les activités de stimulation langagière en analysant les ajustements proposés aux dispositifs de guidance classiques (cf. méthode Hanen) pour répondre aux spécificités des populations défavorisées et multilingues. [less ▲]

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See detailL'éthylisme zutique. Une logique de l'à-fond
Saint-Amand, Denis ULg

Conference (2012, November 16)

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See detailX-fragile et Neurosciences cognitives : entre promesses et réalité.
Majerus, Steve ULg

Conference (2012, November 16)

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See detailInfluence of the protein context on the propensity of polyglutamine tracts to trigger amyloid fibril formation
Huynen, Céline ULg

Conference (2012, November 16)

10 neurodegenerative diseases are associated with 10 proteins containing an expanded polyglutamine (polyQ) tract higher than a threshold of 35-45Q. This polyQ tracts trigger the aggregation of the ... [more ▼]

10 neurodegenerative diseases are associated with 10 proteins containing an expanded polyglutamine (polyQ) tract higher than a threshold of 35-45Q. This polyQ tracts trigger the aggregation of the proteins into amyloid fibrils that could play an important role in the disease. It is therefore necessary to investigate the aggregation properties of polyQ proteins. Accordingly, we have created model proteins made of the β-lactamase BlaP with 23 to 79Q inserted at positions 197 or 216. Their aggregation behaviour recapitulate those of disease-associated proteins (i.e. a threshold and the anticipation phenomenon). Moreover, the threshold depends on the structural integrity of BlaP (which applies constraints to the polyQ). In this work, we investigate the role of the protein context in the aggregation process using two techniques: QCM-D coupled with AFM. We observe that the native conformation of BlaP is the barrier for fibril formation, interfering with the nucleation step. Moreover, the protein environment of the polyQ (position 197 or 216) influences its propensity to form fibrils. [less ▲]

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See detailManagement Control, Strategy and Sustainability: A Review of the Literature
Crutzen, Nathalie ULg; Herzig, Christian

Conference (2012, November 16)

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See detailAnti-utopie, dystopie et contre-utopie : quelles traversées de l’utopie ? D’Émile Souvestre à Léon Daudet
Stienon, Valérie ULg

Conference (2012, November 16)

Les récits anticipant des sociétés futures sous oppression ou sur le déclin sont régulièrement confondus sous les appellations génériques d’« anti-utopie », de « contre-utopie » et de « dystopie » ... [more ▼]

Les récits anticipant des sociétés futures sous oppression ou sur le déclin sont régulièrement confondus sous les appellations génériques d’« anti-utopie », de « contre-utopie » et de « dystopie ». Rarement problématisés en tant que tels, ces appariements dénotent une certaine indécision dans l’appréhension de tout un pan de la tradition littéraire utopique. Réfèrent-ils vraiment à une diversité de représentations des conditions d’accès au bonheur et de réalisation d’un idéal en société ? [less ▲]

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See detailGreen first ! ORBi, le choix d’une politique
Thirion, Paul ULg

Conference (2012, November 16)

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See detailNutritive value of four tropical forage legume hays fed to pigs in the Democratic Republic of Congo
Kambashi Mutiaka, Bienvenu ULg; Boudry, Christelle ULg; Picron, Pascale ULg et al

Conference (2012, November 15)

The incorporation of fibrous feed ingredients such as legume forages in the diets of pigs can be economically interesting due to their low cost and the fact that they do not compete with human food ... [more ▼]

The incorporation of fibrous feed ingredients such as legume forages in the diets of pigs can be economically interesting due to their low cost and the fact that they do not compete with human food. Psophocarpus scandens and Vigna unguiculata are potential protein pig resources. Due to their negative effect on the overall digestibility of the diets, the contribution of tropical forage legumes to the diet should not exceed 25 %. TFL can be potential sources of protein for small scale tropical pig farms, preferably in adult pigs. [less ▲]

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See detailSynthesis of new biomimetic and biodegradable polymers for clinical use
Clement, Benoît ULg; Grignard, Bruno ULg; Koole, Leo et al

Conference (2012, November 15)

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See detailMapping overland flow hazard in order to enhance citizens’ awareness of head catchment hydrology
Pineux, Nathalie ULg; Colard, François; Degré, Aurore ULg

Conference (2012, November 15)

Between 1998 and 2004, Europe suffered from more than hundred major inundations, responsible for some 700 deaths, for the moving of about half a million of people and the economic losses of at least 25 ... [more ▼]

Between 1998 and 2004, Europe suffered from more than hundred major inundations, responsible for some 700 deaths, for the moving of about half a million of people and the economic losses of at least 25 billions Euros covered by the insurance policies. Within this context, EU launched the 2007/60/CE directive. This directive aims at a better evaluation of the risks and a better coordination of prevention, protection and crisis management. In most countries, inundation maps only include rivers’ overflowing. In Wallonia (southern part of Belgium), it was decided to include overland flows and mudflows in the flood hazard map. Indeed, the cleaning operations for a village after a storm can lead to an estimated cost of 11 000 €. Average construction cost of retention dams to control off-site damage caused by floods and muddy flows was valued at 380 000€, and yearly dredging costs associated with these retention ponds at 15 000€. A specific study in Gembloux (25 000 inhabitants) estimated the mean annual cost for the runoff damages to 20 000€. This cost only consists of the physical damages caused to the settlements and movable properties of the residents as well as the emergency operations of the firemen and the city. On top of damages to public infrastructure (clogging of trenches, silting up of retention ponds) and to private property, runoff and mud flows generate a significant loss of arable land. Yet, the soil is not an unlimited resource. Moreover, sediments’ transfer to watercourses alters their physical and chemical quality. And that is not to mention the increased psychological stress for people. But head catchment hydrology is not well known. Mapping the overland flood and mud flow hazard over a 17000 km² region is a real challenge. This contribution will present the pragmatic methodology used in Wallonia. In accordance with the Directive, different maps are produced (25, 50 and 100 years of return period and an extreme scenario). Local characteristics are taken into account: rainfall statistics, soil data, land use and relief. They are used to assess runoff production and transfer to an outlet identified as the point where runoff enters the permanent river network. Peak discharge values are used as basis for the mapping. The maps locate the water paths using a colour chart based on the peak discharge. Summer 2011 and spring 2012 storm events as well as a survey made at the municipalities’ level allowed us to validate in some ways the maps produced. Whereas this first approach at regional scale includes uncertainties, the aim of these maps is currently to prompt recognition of the runoff inundation hazard. It is of major importance for soil conservation and citizens’ protection. Above all, it should contribute to lower the damages by early prevention during the design of town-planning projects. [less ▲]

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See detailSynthesis in scCO2 of nano-hydrogels for proteins delivery
Alaimo, David ULg; Grignard, Bruno ULg; Fustin, Charles-André et al

Conference (2012, November 14)

Detailed reference viewed: 37 (8 ULg)
See detailAn additional role for ATM in the control of NF-kappaB activation by DNA double-strand breaks.
Habraken, Yvette ULg

Conference (2012, November 13)

L’importance de la kinase ATM pour l’activation du complexe IKK suite aux dommages à l’ADN a été démontrée par de nombreuses équipes. ATM est requis pour (i) la phosphorylation de NEMO, (ii) l’activation ... [more ▼]

L’importance de la kinase ATM pour l’activation du complexe IKK suite aux dommages à l’ADN a été démontrée par de nombreuses équipes. ATM est requis pour (i) la phosphorylation de NEMO, (ii) l’activation du complexe TAK1/Tab2 et (iii) l’induction de la poly-ubiquitination de TRAF6 ou RIP1 ou ELKS. Nos travaux ont permis la mise en évidence d’une quatrième fonction d’ATM en aval du complexe IKK. Après avoir montré qu’ATM phosphorylait de manière spécifique la sérine 547 de p65, nous avons établi que la mutation S547A n’affectait pas globalement le potentiel transactivateur du NF-kappaB mais réprimait de manière spécifique la transcription de certains gènes [CXCL1, CXCL2, CCL20, IL-8, TNF, Selectine E, V-CAM1, et, A20]. La transcription d’IκBα et de Cox2 n’est pas influencée par la mutation. L’étude du mécanisme moléculaire, au niveau du promoteur de l’IL8, a montré que la phosphorylation de S547 est responsable de l’interaction avec HDCA1 dont la présence au niveau du promoteur diminue l’acétylation de l’histone H3 et donc réduit la transcription. Ces résultats ont été obtenus en cellules HEK293 exprimant p65WT ou p65S547A exogène (porteur d’une mutation silencieuse les rendant résistants au siRNA utilisé pour éteindre le p65 endogène). [less ▲]

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See detailValidation de la qualité de la viande hachée de porc par une approche métagénomique ciblée
Taminiau, Bernard ULg; Nezer, Carine; Adolphe, Ysabelle ULg et al

Conference (2012, November 13)

Food products represent great biotopes for bacteria. The optimization of foodstuffs conservation pass by a better understanding of those biotopes and their spoilage. The current techniques of new ... [more ▼]

Food products represent great biotopes for bacteria. The optimization of foodstuffs conservation pass by a better understanding of those biotopes and their spoilage. The current techniques of new generation sequencing give a new dimension to the microbial ecology, through the metagenomic analysis of individuals' large number, within a mixed microbial population. Our aim is to demonstrate that this methodology can be successfully applied to the validation of the quality of foodstuffs during storage. This study was carried out on pork minced meat with shelf-life tests in various conditions of preservation (temperature and packaging). The analysis was performed in parallel with standardized microbiological methods and with massive sequencing of two hypervariables regions of the rDNA 16S. The results show an excellent correlation between the two approaches and underline the tremendous utility of metagenomic analysis for in-depth characterization of the potential altering bacteria in fresh meat. [less ▲]

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See detailIntroduction to advanced biomaterials
Grandfils, Christian ULg

Conference (2012, November 13)

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See detailExergySim – Fließschemasimulationen in einem frühen Entwicklungsstadium mit dem Fokus auf Exergiebilanzen
Frenzel, P; Hillerbrand, R; Pfennig, Andreas ULg

Conference (2012, November 13)

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See detailPourquoi retourner à Brentano?
Dewalque, Arnaud ULg

Conference (2012, November 13)

What, if anything, can we expect to gain in adopting a Brentanian approach to the mind? Within the field of contemporary philosophy of mind, two distinct motivations are usually put forward in order to ... [more ▼]

What, if anything, can we expect to gain in adopting a Brentanian approach to the mind? Within the field of contemporary philosophy of mind, two distinct motivations are usually put forward in order to justify something like a return to Brentano: His intentionality thesis and his theory of inner perception. I suggest (a) that these two motivations are much more controversial than it is usually believed and (b) that there nevertheless exists another, more convincing reason for going back to Brentano, namely, his theory of mental analysis. [less ▲]

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See detailAnalysis, description and... evidence. Is the given a myth ?
Brisart, Robert; Leclercq, Bruno ULg

Conference (2012, November 13)

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See detailDosage sérique des antimycosiques azolés
MISTRETTA, Virginie ULg; Charlier, Corinne ULg

Conference (2012, November 13)

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See detailDe la classification à la spectacularisation. La topographie urbaine dans la littérature panoramique
Stienon, Valérie ULg

Conference (2012, November 12)

La littérature dite « panoramique », selon l’expression rétrospective de Walter Benjamin (Paris, capitale du XIXe siècle), forme un ensemble complexe de textes et d’illustrations participant à un ... [more ▼]

La littérature dite « panoramique », selon l’expression rétrospective de Walter Benjamin (Paris, capitale du XIXe siècle), forme un ensemble complexe de textes et d’illustrations participant à un phénomène de société particulièrement notable en France sous la monarchie de Juillet. Prolongeant l’esthétique du tableau textuel, à laquelle se mêlent les influences de la petite presse et des sciences humaines en émergence, les recueils d’études de mœurs se multiplient à cette époque sous des formes diverses (galeries, magasins, musées) et mettent à l’honneur des types et des comportements sociaux. Dans ce contexte, avant l’ambitieux projet haussmannien, le corpus panoramique manifeste un intérêt particulier pour la figuration en mots et en images de la métropole parisienne. En témoignent les nombreuses Physiologies des années 1840 qui offrent des parcours dynamiques dans l’environnement urbain et multiplient les vues de lieux de loisirs et de promenades tels que les bals, les cafés, les passages, les parcs et les cabinets de lecture. Parmi les plus représentatives à cet égard, notons les Physiologies des Champs-Élysées, des Quartiers de Paris, des Rues de Paris, des Diligences et des Grandes Routes, de l’Omnibus, des Cafés de Paris, du Jardin des Plantes et du Flâneur. Ni véritables documents historiques, puisqu’elles mêlent la réalité à la fiction, ni tout à fait œuvres littéraires malgré plusieurs contributions balzaciennes significatives, ces monographies illustrées présentent un traitement particulier de la référence géographique. On examinera la spécificité de ces modes de représentation en rapport avec la nature des savoirs produits sur la ville : le type n’est-il qu’un ensemble de stéréotypes ? quelle distance critique adopter face aux informations urbaines dont regorgent ces textes ? quelles médiations mettent-ils en œuvre dans leur prise en charge des données empiriques ? Ces questions permettront de proposer des éléments de méthodologie pour aborder un traitement textuel et iconographique de l’espace urbain qui, à l’examen, apparaît moins tributaire de l’invention technique et picturale du panorama que d’un réinvestissement particulier de l’ethnographie et de la zoologie en plein développement. [less ▲]

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See detailIntervention dans le cadre du colloque Phénoménologie en Belgique
Gyemant, Maria ULg

Conference (2012, November 12)

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See detailStudy of a solar concentrator for space based on a diffractive/refractive optical combination
Michel, Céline ULg; Loicq, Jerôme ULg; Languy, Fabian ULg et al

Conference (2012, November 12)

This paper presents a new design of a planar solar concentrator at 10× with spectral splitting focusing on two separated PV cells, allowing independent control. Optical elements, blazed diffraction ... [more ▼]

This paper presents a new design of a planar solar concentrator at 10× with spectral splitting focusing on two separated PV cells, allowing independent control. Optical elements, blazed diffraction grating and Fresnel lens, are optimized. [less ▲]

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See detailInfluence of Fiber Distribution and Grain Size on the Mechanical Behavior of Friction Stir Processed Mg-C Composites
Mertens, Anne ULg; Montrieux, Henri-Michel ULg; Lecomte-Beckers, Jacqueline ULg et al

Conference (2012, November 12)

Short C fibers-Mg matrix composites have been produced by friction stir processing sandwiches made of a layer of C fabric stacked between two sheets of either the ductile Mg alloy AZ31B, or of the less ... [more ▼]

Short C fibers-Mg matrix composites have been produced by friction stir processing sandwiches made of a layer of C fabric stacked between two sheets of either the ductile Mg alloy AZ31B, or of the less ductile alloy AZ91D, that is capable of age hardening. It has been shown that the choice of the optimal experimental parameters for the production of sound composites was strongly dependent on the nature of the matrix. 3D X-ray tomography reveals that the fibers orient along the onion rings and that they are more or less fragmented depending on the local shear stress during the process. The fiber volume fraction is increased when the nugget volume decreases in particular for the AZ91D base material and for a high advancing speed for the AZ31B base material. The fiber volume fraction influences directly the grain size, the hardness and the tensile properties of the composites. [less ▲]

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See detailprevention of delirium in perioperatie cares in old persons
Petermans, Jean ULg

Conference (2012, November 10)

Detailed reference viewed: 32 (9 ULg)
See detailAlgorithms for testing the collective consumption model
Talla Nobibon, Fabrice; Cherchye, Laurens; Crama, Yves ULg et al

Conference (2012, November 09)

In this talk, we discuss an extension of the strong axiom of revealed preferences to collective households. The question that we address is whether a set of observed consumption baskets can be decomposed ... [more ▼]

In this talk, we discuss an extension of the strong axiom of revealed preferences to collective households. The question that we address is whether a set of observed consumption baskets can be decomposed in such a way that each of the derived data sets reflects the choices of a “rational” (i.e., utility-maximizing) individual member of the household. Although testing revealed preference axioms on data generated by a single decisionmaker can be done in polynomial time, the extension to two-member households is NP-complete. We propose two algorithms for testing the collective consumption model on large data sets. The first one is an exact algorithm based on a new mixed-integer programming formulation, whereas the second one is a heuristic based on a simulated annealing procedure that solves a global optimization formulation of the problem. Computational experiments are performed on real-life data. [less ▲]

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See detailRole of γδ T cells in the tumoural progression of HPV-associated lesions
Van hede, Dorien ULg; Bastin, Renaud; Francis, Floriane et al

Conference (2012, November 09)

Detailed reference viewed: 26 (7 ULg)
See detailAllaitement maternel : la place des pères
Noirhomme-Renard, Florence ULg

Conference (2012, November 09)

De nombreuses études montrent que les pères ont un rôle influent dans la prise de décision des femmes d’allaiter leur enfant, et que leur soutien est crucial pour le succès de l’allaitement dans la durée ... [more ▼]

De nombreuses études montrent que les pères ont un rôle influent dans la prise de décision des femmes d’allaiter leur enfant, et que leur soutien est crucial pour le succès de l’allaitement dans la durée. Or ils sont peu préparés à ce rôle et souhaiteraient davantage de soutien dans cette expérience. Les recherches menées montrent que si la plupart des pères, pendant la grossesse, ont une représentation positive de l’allaitement et veulent être impliqués, la confrontation avec la réalité est souvent difficile (difficultés d’allaitement inattendues, pression et contradictions de professionnels de santé tournés sur l’aspect technique de l’allaitement, place limitée auprès de l’enfant,…). Après le retour à domicile, les sentiments des pères vis-à-vis de l’allaitement sont très divers et semblent liés à la place qu’ils prennent dans la triade, modulée parfois par la place que leur laisse la mère de l’enfant. Certains pères vivent un sentiment d’exclusion, d’autres se voient comme un « membre de l’équipe allaitante », trouvant d’autres manières de s’impliquer avec leur enfant. Le soutien apporté aux mères prend différentes formes : direct et indirect, verbal et non-verbal, émotionnel et instrumental. Selon les mères ce soutien est essentiel, davantage encore dans certaines situations (primiparité, césarienne, difficultés d’allaitement, fatigue, retour au travail). De leur côté les pères ont besoin d’une reconnaissance de leur rôle par leur partenaire d’une part, par les professionnels de santé d’autre part. Un système de santé « ami des pères » doit impliquer les pères précocement et de manière effective, pour les aider à soutenir leur partenaire dans l’expérience de l’allaitement. [less ▲]

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See detailMonitoring de la somnolence
Wertz, Jérôme ULg; François, Clémentine ULg; Verly, Jacques ULg

Conference (2012, November 09)

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See detailFunción de la intertextualidad bíblica en "El retrato de la Lozana Andaluza" de Francisco Delgado
François, Jéromine ULg

Conference (2012, November 09)

La Lozana andaluza describes the story of a gifted prostitute which adventures occur in Rome before the Sack of 1527. However, the writer, an Andalusian priest, fills his text with biblical references. As ... [more ▼]

La Lozana andaluza describes the story of a gifted prostitute which adventures occur in Rome before the Sack of 1527. However, the writer, an Andalusian priest, fills his text with biblical references. As the purpose of his Portrait gives rise to debate and is valued according to its (un)appropriateness to the Christian doctrine, we study the role of the biblical intertextuality in the determination of this purpose. Indeed, in La Lozana, the biblical hypotext presents its traditional function as an auctoritas but it also constitutes a favored tool of linguistic games, a source of comic effects, and supplies the framework of the Portrait. In this work we examine the mixed intertextuality used by an autor which anticlericalism was sometimes interpreted as an erasmist feature. Consequently, we highlight, always making links with the biblical marks of La Lozana, first some evidences that make an orthodox interpretation possible, and later some dissident tendencies that cross the story. The biblical intertextuality produces a duplicity of the discourse that prevents an univocal interpretation. In fact, this posture is understandable during a time which is disturbed by religious tensions. [less ▲]

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See detailApproche moins invasive de la chirurgie muco-gingivale
LAMBERT, France ULg

Conference (2012, November 08)

Detailed reference viewed: 17 (2 ULg)
See detailSpirou, une aventure du mouvement
Tomasovic, Dick ULg

Conference (2012, November 08)

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See detailCapitalizing on mid-infrared to improve nutritional and environmental quality of milk
Soyeurt, Hélène ULg; Dehareng, Frédéric; Gengler, Nicolas ULg et al

Conference (2012, November 07)

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See detailLiaison 1-84 PTH and KDIGO guidelines
CAVALIER, Etienne ULg

Conference (2012, November 07)

Detailed reference viewed: 34 (2 ULg)
See detailAir Cavity ship as a solution to reduce frictional resistance
Lapy, Matthieu ULg; Hage, André ULg

Conference (2012, November 06)

Frictional resistance is an important part of the total resistance of a ship, especially when the Froude number is small. There exists different ways to reduce it, like riblets, polymer injection, air ... [more ▼]

Frictional resistance is an important part of the total resistance of a ship, especially when the Froude number is small. There exists different ways to reduce it, like riblets, polymer injection, air lubrication and air cavity. The first two techniques are hard to implement for full-scale ships. The air lubrication is subjected to plenty of research for around twenty years and could lead to resistance reduction up to 80%. Unfortunately, full-scale tests do not present the same results. The principle of air cavity ships is quite different, in the sense that air is blocked under the hull. The system exists for more than 100 years, but does not seem to convince the naval architects, although it can reduce the resistance up to 20%. The problem is that it can increase the resistance. Better knowledge of the phenomena is then necessary. [less ▲]

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See detailPlantes Médicinales Antipaludiques de l'île de la Réunion
Frederich, Michel ULg; Jonville, Marie-Caroline ULg; Grondin, Isabelle et al

Conference (2012, November 06)

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See detailVos définition de la naturalité et du clean-label
Goffin, Dorothée ULg

Conference (2012, November 06)

Table ronde avec panel d'expert sur la définition de la naturalité et du clean-label

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See detailDeveloping national health sector monitoring and accountability platforms. The opportunity of IHP+ in Benin, Burkina Faso, Mali and Senegal
Paul, Elisabeth ULg; Akpamoli, Alphonse; Ba, Amadou D. et al

Conference (2012, November 01)

There is now growing consensus about the importance of building and strengthening national monitoring platforms in order to facilitate the evaluation of large-scale health programmes and initiatives in ... [more ▼]

There is now growing consensus about the importance of building and strengthening national monitoring platforms in order to facilitate the evaluation of large-scale health programmes and initiatives in low- and middle-income countries [see the paper published in 2010 in The Lancet by Victora et al.]. This is also crucial for improving accountability, which is defined by the United Nations' Commission on Information and Accountability for Women's and Children's Health as a cyclical process of monitoring, review, and (remedial) action. The International Health Partnership and related initiatives (IHP+), World Health Organization and other partners have recently developed guidelines to support country-led platforms for monitoring, evaluation and review of national health strategies. The national Compacts promoted in the framework of IHP+ offer an excellent opportunity to foster the development of such country-led platforms for information and accountability. Indeed, a Compact formalises the commitments of the recipient government and health sector partners to increase financing efforts in the health sector, to respect aid effectiveness principles and to support the national health policy and strategies in a common planning, coordination, and monitoring & evaluation framework. IHP+ is also closely connected to initiatives such as the Health Metrics Network that aims to improve the quality of health information in developing countries. We propose to analyse how the Ministries of Health in four Francophone Western African countries (Benin, Burkina Faso, Mali and Senegal) have seized the opportunity of IHP+ to strengthen their monitoring and accountability platforms, and assess what further actions could be taken in the future. We present a comparative analysis grid filled on the basis of the experience of the co-authors in supporting the process in the four countries. This composes the first step of an on-going research and experience sharing project supported by GRAP-PA Santé. [less ▲]

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See detailContrasting Two Ways of Making Psychology: Brentano and Freud
Gyemant, Maria ULg

Conference (2012, November 01)

Brentano’s views on psychology influenced the way philosophy was made at the beginning of the 20th century. But did this influence spread as far as to give place to Freud’s revolutionary discovery of the ... [more ▼]

Brentano’s views on psychology influenced the way philosophy was made at the beginning of the 20th century. But did this influence spread as far as to give place to Freud’s revolutionary discovery of the psychoanalytical unconscious? We know that Sigmund Freud attended enthusiastically Brentano’s lectures between 1874 and 1876. Yet, since Brentano’s name is never mentioned in Freud’s later, properly psychoanalytical writings, there is a very convincing argument for stating that Brentano had no lasting influence on Freud. Furthermore, Freud’s theory of the unconscious doesn’t seem to continue, but rather to oppose Brentano’s psychological views. Yet, as it was shown lately by a number of philosophers there are reasons to believe that Brentano had a profound influence on Freud. An attentive analysis of Freud’s vocabulary as well as his arguments against “philosophical” objections supports this point rather convincingly. However, Freud was not a philosopher and Brentano’s historical influence does not suffice to transform the Freudian unconscious in a philosophical concept. It is the purpose of this paper to sketch a way to make a philosophical use of Freud’s unconscious by reconstructing the dialogue between Brentano and Freud on a conceptual level. First, I will explain the differences between Brentano and Freud’s psychology. While Brentano and even the most original of his students thought the mind is entirely conscious, and they only called “unconscious” certain intermittences of this consciousness, Freud’s metapsychology rests on the supposition that the mind is primarily unconscious and it is consciousness that appears locally as a quality of certain mental events. In the second part of my paper I will show that this opposition is not as radical as it seems. Freud’s metapsychological supposition of an unconscious mind is not merely stated but proven by clinical facts. And these facts allow Freud to substitute a dynamic approach of the mental to a descriptive psychology of Brentanian inspiration: a mental state is only conscious because it becomes thus by passing from an unconscious to a conscious state. It is this change in the point of view that allows Freud to see mental events as processes rather than mere states. Thus, the results of Brentano’s descriptive psychology are not denied but rather completed by Freud’s dynamic theory of the unconscious. The purpose of this paper is thus to clarify not only Freud’s historical relation to Brentano, but also the relation of his metapsychology to Brentano’s descriptive psychology and to all psychology that takes Freud’s discovery of the unconscious seriously. Despite the explicit critique of the unconscious that we find in the Psychology from an Empirical Standpoint, I think that Freud never truly opposed Brentano. He rather took Brentano’s descriptive psychology a step further: he introduced a dynamic component to the analysis of the psyche that could throw light on the blind spots in Brentano’s psychology. [less ▲]

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See detailEvaluation qualitative et quantitative des ressources en eau souterraine dasn le bassin de Dargol (Liptako – Niger)
Abdou Babaye, Maman Sani ULg; Boureimane, Ousmane; Orban, Philippe ULg et al

Conference (2012, November)

Située dans la partie Sud-Ouest du Niger, le bassin de Dargol appartient à la région de socle précambrien du Liptako. L’étude du chimisme des eaux souterraines révèle trois types de faciès dont le plus ... [more ▼]

Située dans la partie Sud-Ouest du Niger, le bassin de Dargol appartient à la région de socle précambrien du Liptako. L’étude du chimisme des eaux souterraines révèle trois types de faciès dont le plus dominant est le type bicarbonaté calcique à magnésien (65%). Environ 47% d’ouvrages ont des teneurs en nitrates dépassant largement les normes OMS (50 mg/l). Les teneurs en isotopes stables (δ18O, δ2H) de la nappe indiquent deux mécanismes de recharge: une recharge directe par les eaux des pluies peu ou pas évaporées, et une recharge indirecte par les eaux évaporées issues des lits de koris et des eaux de surface. L’analyse des teneurs en tritium de la nappe indique que la recharge est récente pour la majorité des points investigués. En revanche, dans le secteur à faibles teneurs en tritium, le taux de renouvellement semble être faible voire nul. [less ▲]

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See detailThe containment strategy of extreme right wing parties : a failure ?
Italiano, Patrick ULg; Pieters, Jérôme ULg; Kovincic, Petar ULg et al

Conference (2012, November)

When confronted to data from European social Survey, there seems to be no link between the acceptance of immigration by public opinion in a sample of western Europe countries and the presence of extreme ... [more ▼]

When confronted to data from European social Survey, there seems to be no link between the acceptance of immigration by public opinion in a sample of western Europe countries and the presence of extreme right parties in those countries. This contradicts various political analysis and some other data. The paper states this possible discrepancy and tries to find explanations [less ▲]

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See detailVocal Impact of a Prolonged Reading Task in Dysphonic versus Normophonic Female Teachers
Remacle, Angélique ULg; Morsomme, Dominique ULg; Berrué, Elise et al

Conference (2012, November)

OBJECTIVES: This study evaluates the impact on voice of a 2-hour reading task between 70-75 dB(A) in 16 normophonic and 16 dysphonic female teachers with vocal nodules. METHODS: Objective measurements ... [more ▼]

OBJECTIVES: This study evaluates the impact on voice of a 2-hour reading task between 70-75 dB(A) in 16 normophonic and 16 dysphonic female teachers with vocal nodules. METHODS: Objective measurements (acoustic analysis, voice range measurements, aerodynamic measurements) and subjective self-ratings were collected before the task and every 30 minutes during the reading to determine the voice evolution in both groups. RESULTS: Fundamental frequency, lowest frequency, highest frequency (F-High), highest intensity and intensity range increase through the reading, whereas Shimmer decreases. Maximum phonation time decreases after 30 minutes. Estimated subglottal pressure (ESP) and sound pressure level increase during the first hour. Afterwards, ESP decreases. Self-ratings worsen through time. When comparing the normophonic and the dysphonic teachers, self-ratings reveal more complaints in the dysphonic group. Few differences in objective measurements are found between both groups: normophonic teachers show lower ESP, higher F-High and greater frequency range. CONCLUSIONS: Frequency modifications from acoustic analysis and voice range measurements suggest an increased laryngeal tension during vocal load, while subjects perceive a worsening of voice. Aerodynamic parameters depict first a deterioration of voice efficiency and then an adaptation to the prolonged reading. The comparison between both groups shows a discrepancy between objective measurements and self-ratings, suggesting that both approaches are necessary to have a complete view of vocal load effects. Surprisingly, both groups behave similarly through vocal load, without more or quicker deterioration of voice in the dysphonic group. [less ▲]

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See detailMoisture equilibrium in straw bale walls
Evrard, Arnaud; Louis, Arnaud ULg; Biot, Benjamin et al

Conference (2012, November)

Straw bales technology for buildings is developing in Belgium as in many other countries. The market is growing but significant uncertainties are left concerning how to model its dynamical hygrothermal ... [more ▼]

Straw bales technology for buildings is developing in Belgium as in many other countries. The market is growing but significant uncertainties are left concerning how to model its dynamical hygrothermal performances and its long term behaviour. The present paper presents the preliminary analysis conducted on material parameters and component’s response to dynamic heat and moisture solicitations. The simulations use WUFI Pro software based on material parameters form literature and both reference climate files for Belgium and theoretical climates to analyse the interactions between straw bale walls and finishing materials and their influence on component performances and durability. A specific prefabricated wall element sold on Belgian market is detailed and introduced in simulations. The influence on comfort feelings and indoor air quality are discussed with a focus on component´s thermal inertia and moisture regulation capacity. The paper concludes with recommendations on wall composition to help straw bale technologies to develop in building market of Belgium and other countries. [less ▲]

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See detailUne parenté inattendue. Raymond Queneau et les recalés de l'écriture
Goto, Kanako ULg

Conference (2012, November)

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See detailContribution de la tomographie et du bruit sismique à la characterisation des dépôts alluviaux dans le bassin du Kou (Burkina Faso)
Sauret, Elie ULg; Beaujean, Jean ULg; Nguyen, Frédéric ULg et al

Conference (2012, November)

Abstract The alluvial plain of the Kou basin is located in the southwest of Burkina Faso. In this basin, the main surface water resource for agricultural needs is constituted by a small perennial river ... [more ▼]

Abstract The alluvial plain of the Kou basin is located in the southwest of Burkina Faso. In this basin, the main surface water resource for agricultural needs is constituted by a small perennial river, but in recent years this resource is insufficient to satisfy the uses in agriculture. The alluvial plain which extends from either side of this river banks is expected to have the potential for constituting an alternative water supply for agricultural needs. However, the characterisation of the alluvial plain is still superficial though the plain extension and the nature of the deposits are roughly known. The objective of this study is to improve the characterisation of the alluvial plain, in particular the heterogeneity and the thickness of the deposits, using geophysical methods, namely Electrical Resistivity Tomography (ERT) and Horizontal and Vertical Spectral Ratio (H/V SR). The ERT and H/V SR methods are non invasive geophysical techniques, simple, efficient, robust and easy-to-use geophysical tools in alluvial environment based respectively on the soil resistivity and the resonant frequency of superficial materials. In upstream of the alluvial plain, near the river, these methods were used to map the sandy to sandy-thin deposits (0-5m) and the unfractured bedrock. Downstream they highlight fractured and deconsolidated bedrock drawing a V-shaped geometry of deposits. This geometry is due to the faults and the magmatic intrusions. The bottom of the V-shaped would be filled mainly by fractured/deconsolidated bedrock materials and the edges by the clay and laterites deposits. The alluvial plain would be relatively thicker downstream of the study area (approximately 30 to 50m). A correlation is obtained between ERT images and resonance frequencies determined on the H/V profiles. From a hydrogeological point of view, downstream of the study area, the alluvial plain would constitute an important aquifer with a high porosity and thick deposits. This aquifer could be easily accessible with rudimentary structures (such as sumps) and could constitute a supplementary water source, for irrigation activities in this second region of Burkina Faso. [less ▲]

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See detailEtude hydrogéochimique des eaux de la nappe du Continental Terminal du Saloum : Relation eau de surface – eau souterraine
Dieng, Ndeye Maguette ULg; Orban, Philippe ULg; FAYE, Serigne et al

Conference (2012, November)

L’évaluation de l’état actuel de la qualité des eaux de la nappe du Continental Terminal et du fleuve Saloum a été réalisée grâce à l’analyse de 44 échantillons d’eau souterraine et 3 échantillons d’eau ... [more ▼]

L’évaluation de l’état actuel de la qualité des eaux de la nappe du Continental Terminal et du fleuve Saloum a été réalisée grâce à l’analyse de 44 échantillons d’eau souterraine et 3 échantillons d’eau de surface collectés en saison humide. Les analyses des ions majeurs et les mesures de la conductivité électrique (CE) ont démontré que les eaux de la nappe du CT du Saloum étaient largement contaminées par la salinisation (CE comprise entre à 750 et 2800 µS/cm) au niveau de la zone côtière à l’ouest et au nord sur une bande longeant le fleuve Saloum. Dans ces zones, les eaux ont désormais des faciès chimiques chlorurés sodiques venant de faciès au départ bicarbonatés calciques des eaux souterraines peu contaminées. Au niveau de certains points, la composition des eaux souterraines devient sensiblement la même que celle des eaux du fleuve Saloum. Les diagrammes binaires (Na versus Cl, Na/Cl versus Cl, [Ca + Mg] versus HCO3 et [(Ca+Mg) - (HCO3+SO4)] versus (Na-Cl)) ont permis de définir les processus géochimiques et les phénomènes de mélange impliqués dans la minéralisation des eaux. Suivant la répartition des valeurs de conductivité électrique et des types d’eaux, une zonation a été cartographiée [less ▲]

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See detailLa lignine, une molécule d'intérêt issue du bioraffinage lignocellulosique
Richel, Aurore ULg

Conference (2012, November)

La mise sur pied d’initiatives de bioraffinage lignocellulosique génère des quantités importantes de lignines sous-exploitées. La lignine, l’une des molécules renouvelables les plus abondantes sur terre ... [more ▼]

La mise sur pied d’initiatives de bioraffinage lignocellulosique génère des quantités importantes de lignines sous-exploitées. La lignine, l’une des molécules renouvelables les plus abondantes sur terre, est un biopolymère fortement ramifié constitué d’unités aromatiques. La composition de ce polymère est fortement influencée par la nature du substrat lignocellulosique et par les conditions de cracking appliquées. Généralement destinée à des fins énergétiques, la lignine se voit aujourd’hui ouvrir de nouvelles pistes de valorisation à plus haute valeur ajoutée telles que des applications comme gaz de synthèse, additif dans le secteur de la plasturgie ou comme source de composés aromatiques destinés au secteur chimique. [less ▲]

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See detailAb initio thermoelectric properties
Xu, Bin ULg; Diakhate, Momar ULg; Fillippetti, Alessio et al

Conference (2012, November)

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See detailConstant 2-labelling of weighted cycles
Gravier, Sylvain; Vandomme, Elise ULg

Conference (2012, November)

We introduce the concept of constant 2-labelling of a weighted graph and show how it can be used to obtain periodic sphere packing. Roughly speaking, a constant 2-labelling of a weighted graph is a 2 ... [more ▼]

We introduce the concept of constant 2-labelling of a weighted graph and show how it can be used to obtain periodic sphere packing. Roughly speaking, a constant 2-labelling of a weighted graph is a 2-coloring (black and white) of its vertex set which preserves the sum of the weight of black vertices under some automorphisms. In this manuscript, we study this problem on weighted complete graphs and on weighted cycles. Our results on cycles allow us to determine (r,a,b)-codes in Z^2 whenever |a-b|>4 and r>1. [less ▲]

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See detailAn open-air site from the recent Middle Palaeolithic in the Paris Basin (France): Les Bossats at Ormesson (Seine-et-Marne).
Bodu, Pierre; Lacarrière, Jessica; Leroyer, Mathieu et al

Conference (2012, November)

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See detailWhat is the best use of sugar crops? Environmental assessment of two potential applications : biofuels vs. bioproducts
Belboom, Sandra ULg; Léonard, Angélique ULg

Conference (2012, November)

Agricultural crops became through years an attractive option to increase European energy independence. Brazil has taken this opportunity since the seventies by using sugar cane bioethanol as vehicle fuel ... [more ▼]

Agricultural crops became through years an attractive option to increase European energy independence. Brazil has taken this opportunity since the seventies by using sugar cane bioethanol as vehicle fuel. The development of biofuels production is more recent in Europe. Due to temperate climates, bioethanol production is mostly based on wheat and sugar beet, this latter being considered as the ‘equivalent’ sugar crop to sugar cane for Europe. Biofuel is the most common application of bioethanol but its transformation into bioethylene through a dehydration step and then its polymerization into bioplastic can be an alternative as already found in Brazil. This paper will consider both potential uses and compare them using Life Cycle Assessment methodology. Common boundaries of the systems comprise the cultivation step for both crops, i.e. sugar cane and sugar beet, with all associated energetic and fertilizer consumptions, the transportation step from field to the industrial plant, the sugar crops transformation into hydrate bioethanol, the by-products valorisation and the specific end-of-life. For the biofuel scenario, a dehydration step using molecular sieve is added to get anhydrous bioethanol. For the bioethylene scenario, industrial dehydration and polymerization steps are added. Direct comparison between both scenarios is not possible due to different products uses. The comparison was then performed for both scenarios between the bio-based product and its fossil equivalent. ReCiPe 2008 method was used at midpoint level to get the environmental impacts. As expected, the impact of bio-based products in climate change and fossil fuel depletion categories decreases compared to the fossil counterparts. For other categories, difference is less significant and results are often better for fossil products. Land use change impact was implemented to assess its importance. Depending on assumptions, the greenhouse gas emissions from crop implementation on a natural land can counteract the previous mentioned benefits. To get an idea of the performance of each considered bioethanol use, a single score relative to the amount of sugar cane and sugar beet cultivated on one hectare was calculated using the endpoint level of ReCiPe 2008 methodology. The environmental gain was then evaluated comparing the bio-based product use with the classical one. The highest performance was obtained for the bioplastic scenario based on sugar cane followed by the sugar beet bioplastic. The E5 biofuel based on sugar beet reaches a slightly lower gain. The E85 fuel obtains less gain due to the higher amount of biofuel needed to drive the same distance as using fossil fuel. When taking the land use change into account, the best gain is given by the sugar beet bioplastic. On the one hand, this study shows the importance of assumptions, especially in the agricultural field, on the obtained results. On the other hand, it points out that considering bioethanol as a chemical intermediate and not a fuel can be better from an environmental point of view. [less ▲]

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See detailRole of SoxE genes in the development of the auditory portion of the inner ear
Delacroix, Laurence ULg

Conference (2012, November)

The transcription factors of the soxE family, including sox8, sox9 and sox10 play important roles in diverse developmental processes. However little is known about their function during inner ear ... [more ▼]

The transcription factors of the soxE family, including sox8, sox9 and sox10 play important roles in diverse developmental processes. However little is known about their function during inner ear development. In the developing inner ear we detected sox9 and sox10 in the sensory epithelia since the formation of the otic placode. As the organ of Corti begins to differentiate, sox9 and sox10 expression are progressively restricted to supporting cells. This expression profile prompted us to evaluate the role of SoxE genes in cochlear cell terminal differentiation. Analysis of Sox10 knockout mice showed that it is dispensable for prosensory domain formation but that it is required for its maintenance. Indeed, we observed a significant shortening of the cochlear duct. However, Sox10 does not seem to play a role in cochlear cell fate since cell patterning is not affected in knockout mice. In parallel, we analysed the role of Sox9 in cell specification using both gain- and loss-of function approaches. We demonstrate that Sox9 strongly inhibits hair cell fate even when it is forced by ectopic expression of Atoh1, a potent inducer of hair cell differentiation. Accordingly, Sox9 expression needs to be downregulated in cells that are committed to become hair cells as it was observed in the developing inner ear. To confirm the role of Sox9 in vivo, we also analysed inner ear cell patterning in Sox9a-/-, Sox9b-/- and double knockout zebrafishes at different developmental stages. In parallel, we are investigating the molecular mechanisms underlying Sox9 inhibitory effect on hair cell fate in UB/OC1 cell line and more specifically its relationship with other important factors for cell specification in the organ of Corti such as Sox2, Notch pathway or Atoh1. Taken together, our work is shedding a new light on the role of soxE genes during inner ear development, specification and maintenance of differentiated cells within the cochlea. [less ▲]

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See detailComa and disorders of consciousness
Charland-Verville, Vanessa ULg; Laureys, Steven ULg

Conference (2012, November)

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See detailReformuler, argumenter, problématiser : des pratiques langagières contrastées
Scheepers, Caroline ULg

Conference (2012, November)

L’initiation à l’écriture scientifique telle qu’elle se décline dans les mémoires de Master peut se focaliser sur plusieurs de ses dimensions, mais la capacité à problématiser est peut-être l’une des ... [more ▼]

L’initiation à l’écriture scientifique telle qu’elle se décline dans les mémoires de Master peut se focaliser sur plusieurs de ses dimensions, mais la capacité à problématiser est peut-être l’une des exigences les plus complexes qui se pose au chercheur néophyte. Cette contribution envisage des travaux dans lesquels les étudiants doivent tout à la fois rendre compte d’un ouvrage lu, formuler et étayer un avis critique à son encontre et articuler le livre à une ébauche de problématique de recherche. Une analyse sociolinguistique des données révèle trois logiques scripturales contrastées : émergent en effet des discours restitutifs (il s’agit de donner à voir), critiques (il s’agit de faire croire) ou problématisants (il s’agit de faire savoir). La question de la place dévolue à la linguistique, tant en termes de formation que de recherche, sous-tend toute la réflexion. [less ▲]

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See detailEvolutionary mechanisms in colonizing plant populations
Monty, Arnaud ULg

Conference (2012, November)

In a rapidly changing world, human activities offer opportunities for many plant species to colonize new areas. Increasingly, it is recognized that colonization can be accompanied by different ecological ... [more ▼]

In a rapidly changing world, human activities offer opportunities for many plant species to colonize new areas. Increasingly, it is recognized that colonization can be accompanied by different ecological and evolutionary processes, acting over relatively short periods of time. When populations colonize novel environments, individuals’ phenotypes will depend on a combination of different, non-exclusive processes, including phenotypic plasticity (PP), local adaptation (LA), environmental maternal effects (EME) and genetic drift (GD)(Monty and Mahy 2009b). Despite these processes have long been studied independently, few attempts have been made to simultaneously address the importance of those processes in plant colonization. Here, we present a set of related studies aiming at disentangling the role of PP, LA, EME and GD in Senecio inaequidens (Asteraceae) in southern France, where it was introduced at a single wool-processing site in the late 19th century. We used seeds from populations growing in contrasted climates to explore the phenotypic variation related to climate. We performed several common garden experiments (Monty et al. 2009, Monty and Mahy 2009a, 2010), as well as a reciprocal sowing experiment with gardens under Mediterranean and Pyrenean climates (Monty et al. in revision). We analyzed climatic phenotypic variation in germination, growth, reproduction, leaf physiology and survival. We characterized genetic structure in the studied populations using AFLP. We found consistent genetic differentiation in growth traits but no home-site advantage, thus weak support for LA to climatic conditions. In contrast, genetic differentiation showed a relationship to colonization history. PP in response to climate was observed for most traits, and it played a particularly important role in leaf trait variation. EME mediated by seed mass influenced all but leaf traits under harsh climate. Heavier, earlier-germinating seeds produced larger individuals that eventually produced more flower heads throughout the growing season. However in a milder climate, EME were negligible. Our different studies suggest that phenotypic variation in response to climate depends on various ecological and evolutionary processes associated with geographical zone and life history traits. Therefore, we argue that a “local adaptation vs. phenotypic plasticity” approach, as often considered in the literature, is not sufficient to fully understand what shapes phenotypic variation and genetic architecture of colonizing populations. References Monty, A., J.-P. Bizoux, J. Escarré, and G. Mahy. in revision. Rapid plant invasion in distinct climates involves different sources of phenotypic variation. PLoS ONE. submitted Monty, A., J. Lebeau, P. Meerts, and G. Mahy. 2009. An explicit test for the contribution of environmental maternal effects to rapid clinal differentiation in an invasive plant. Journal of Evolutionary Biology 22:917-926. Monty, A. and G. Mahy. 2009a. Clinal differentiation during invasion: Senecio inaequidens along altitudinal gradients in Europe. Oecologia 159:305-315. Monty, A. and G. Mahy. 2009b. Évolution des traits d’histoire de vie lors des invasions végétales. Biotechnologie, Agronomie, Société et Environnement 13:449-458. Monty, A. and G. Mahy. 2010. Evolution of dispersal traits along an invasion route in the wind-dispersed Senecio inaequidens (Asteraceae). Oikos 119:1563-1570. [less ▲]

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See detailThe neuroscience of tinnitus: Perspectives from human neuroimaging studies
Maudoux, Audrey ULg; Vanneste, Sven; De Ridder, Dirk et al

Conference (2012, November)

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See detailAlternative splicing switches tropism of a gammaherpesvirus
Machiels, Bénédicte ULg; Gillet, Laurent ULg

Conference (2012, November)

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See detailNovarina et la philosophie. Réponse à Marco Baschera
Dubouclez, Olivier ULg

Conference (2012, November)

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See detailProduction of surface-active agents and antioxidants from renewable resources under microwave heating
Richel, Aurore ULg

Conference (2012, November)

The non-energetic valorization of renewable resources using efficient and eco-friendly methodologies is the central axis of the “green chemistry” concept. In particular, the chemical conversion of ... [more ▼]

The non-energetic valorization of renewable resources using efficient and eco-friendly methodologies is the central axis of the “green chemistry” concept. In particular, the chemical conversion of carbohydrates arising from the hydrolysis of non-edible vegetable feedstock (i.e., lignocellulosic biomass and streams) is a widely explored thematic for the production of new high-added value materials. In this context, we report here on the development of a microwave heating methodology for the efficient production of carbohydrate-based and lignin-based chemicals with relevant antioxidant and surface-active properties. New effective synthetic protocols minimizing wastes and energy-consumption are proposed. Enhanced yields and selectivities are achieved after a few minutes of microwave heating using heterogeneous catalysts. The benefits of this microwave approach are highlighted in terms of yields, atom efficiency, environmental factor, and carbon efficiency. Up-scaling assays are also discussed. [less ▲]

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See detailAntarctic cyanobacterial diversity: how important are the geographical and ecological factors?
De Carvalho Maalouf, Pedro ULg; Lambion, Alexandre ULg; Gillard, Benjamin et al

Conference (2012, October 31)

On the Antarctic continent, cyanobacteria produce conspicuous benthic microbial mats in lakes, from the coastal regions to the mountains (till 84°S). However, little is known about theirl biodiversity in ... [more ▼]

On the Antarctic continent, cyanobacteria produce conspicuous benthic microbial mats in lakes, from the coastal regions to the mountains (till 84°S). However, little is known about theirl biodiversity in comparison with other regions of the world. The BelSPO project AMBIO aimed to test whether (i) microbial communities are structured by the same factors as those shaping communities of macroorganisms, and (ii) endemism among cyanobacteria does exist. We have analyzed the cyanobacterial biodiversity in a variety of aquatic habitats from the three main biogeographical regions (Continental, Maritime Antarctica and the Sub-Antarctic) and determined the ‘baseline’ data needed to understand the contribution of various processes that are responsible for the distribution patterns. [less ▲]

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See detailProposition du canevas de Plan simple de Gestion d’une Forêt Communautaire
Vermeulen, Cédric ULg; Meunier, Quentin; Makanga Moussayou, Bède et al

Conference (2012, October 31)

Plaidoyer pour des plans simples de gestion vraiment accessibles aux populations locales

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See detailAGUA, PODER Y TERRITORIO: Estrategias locales de Gestión Territorial
Cabrera Quispe, Juan Edson ULg

Conference (2012, October 31)

Expone la forma de gestión local de agua a través de operadores locales y su efecto en la morfología urbana.

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See detailThe vocal profile for singers
Morsomme, Dominique ULg; Larrouy, Pauline ULg

Conference (2012, October 30)

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See detailEléments bibliographiques pour une histoire géologique de la notion de race
Gérard, Marie ULg

Conference (2012, October 30)

La notion de race est un produit historique dont la définition actuelle est le résultat de déplacements successifs des significations. Cette évolution est reliée à des évolutions des connaissances mais ... [more ▼]

La notion de race est un produit historique dont la définition actuelle est le résultat de déplacements successifs des significations. Cette évolution est reliée à des évolutions des connaissances mais aussi des usages et des dispositifs de mise en valeur et des modes d'organisation sociale de l'élevage. [less ▲]

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See detailComposite Manufacturing by Friction Stir Processing
Simar, Aude; de Meester, Bruno; Delannay, Francis et al

Conference (2012, October 29)

A new solid-state process developed recently on the same principles as Friction Stir Welding (FSW), Friction Stir Processing appear as a very promising technique for the production of metal matrix ... [more ▼]

A new solid-state process developed recently on the same principles as Friction Stir Welding (FSW), Friction Stir Processing appear as a very promising technique for the production of metal matrix composites and for tailoring materials properties. In the present work, this process has been applied to two different composite systems: (i) magnesium-matrix composites reinforced with carbon fibers, and (ii) copper-matrix composites reinforced with Y2O3 powder. Process optimization and mechanical properties of the composites are discussed in both systems. [less ▲]

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See detailCYBERDEPENDANCE : MYTHE OU REALITE ?
Triffaux, Jean-Marc ULg

Conference (2012, October 27)

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See detailCardiac surgery and acute kidney injury: retrospective study
LAGNY, Marc-Gilbert ULg; BLAFFART, Francine ULg; Defraigne, Jean-Olivier ULg et al

Conference (2012, October 27)

Background: In cardiac surgery, acute kidney injury (AKI) is a severe postoperative complication and associated with increased rates of mortality, morbidity, and length of stay in intensive care units ... [more ▼]

Background: In cardiac surgery, acute kidney injury (AKI) is a severe postoperative complication and associated with increased rates of mortality, morbidity, and length of stay in intensive care units (ICU). It occurs in 5% to 30% of patients depending on the definition used [1] [2] [3]. The aim of this study is to present an overview of AKI following cardiac surgery associated or not with cardiopulmonary bypass, in our center. Methods: This retrospective study includes patients treated by cardiac surgery from April 1st, 2008 to March 31th, 2009 in a single center. We selected patients who underwent on-pump coronary artery bypass surgery (CABG), off-pump CABG (OPCAB), aortic valve replacement, mitral valve repair or replacement and aortic valve replacement combined with CABG. Patients undergoing renal replacement therapy preoperatively were excluded. The RIFLE classification (Risk, Injury, Failure, Loss and End stage kidney disease) allowed stratifying the patients into the 3 grades of AKI severity. The stratification was based on the most pejorative element observed within 7 days after surgery: increased serum creatinine level or decreased urine output, or decreased glomerular filtration rate according to criteria of Bellomo [4]. Occurrence of AKI was studied by type of cardiac surgery as its impact on the length of stay in ICU and in the hospital. Proportions were compared by the Chi-square test and median values by the Mann-Whitney U test. Results were considered significant at p < 0.05. Results: Four hundred and thirty-four patients were included: median (IQR) age 69.0(60.0-76.0) year, 30.2% females, 2.76% urgent/emergent cases. Fifty-eight patients (13.4%) underwent OPCAB, 182(41.9%) on-pump CABG, 104(24.0%) aortic valve replacement, 44(10.1%) mitral valve repair or replacement and 46(10.6%) aortic valve replacement combined with CABG. AKI occurred in 213(49.1%) patients: 79(37.1%) “Risk”, 108(50.7%) “Injury” and 26(12,2%) “Failure”. Distribution of AKI by type of surgery was equal to 36.2% among OPCABG, 44.0% on-pump CABG, 49.0% aortic valve replacement, 52.3% mitral valve surgery and 82.6% aortic valve replacement combined with CABG, respectively. AKI occurrences differed significantly according to the type of surgery (p<0.0001). Lengths of stay in ICU were significantly longer (p<0.0001) in AKI group compared with non AKI group: 3(2-4) days versus 2(2-3) days. However, no difference (p = 0.65) was observed between the two (AKI and NON-AKI) groups in hospital length of stay: 13(10-18) days versus 12(10-16) days. Conclusions: The incidence of AKI is very high in this population as compared to the literature. This may be due to the fact that the three elements of the RIFLE classification for all the population studied have been used. This study emphasizes the need for clear definition of AKI in order to compare different studies adequately. AKI after cardiac surgery with cardiopulmonary bypass would be further studied in order to develop more appropriate preventive measures. [less ▲]

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See detailChildhood and Work at the Neoliberal Age: Ethnography of Child Work in Artisanal and Small-scale Mining in the Katanga province (DRC)
Andre, Géraldine ULg; Godin, Marie

Conference (2012, October 26)

This paper aims at analyzing the work activities carried out by children in artisanal and small-scale mining in Katanga, DRC, in the wake of the evolution of representations of work, masculinity, family ... [more ▼]

This paper aims at analyzing the work activities carried out by children in artisanal and small-scale mining in Katanga, DRC, in the wake of the evolution of representations of work, masculinity, family and childhood since the reforms of the Congolese mining sector promoted by the institutions of Bretton Woods. Katanga has been the industrial flagship of the Belgian Congo organized around the mining town of Lubumbashi during the colonial period and also after the independence of the country. The “union minière du Haut-Katanga” created by Belgians and nationalized after with the name of “Gécamines” has had a decisive impact on the structuration of the collective imagination on work, masculinity, family and childhood in this area of the country, which contains an infinite geologic potential and, as such, is strongly connected to global flows of raw materials exploitation. What is the impact of the reforms of the mining sector encouraged by the World Bank and the International Monetary Fund according to the ideals of schooling, nuclear family and father as the main breadwinner, the ones that have been promoted by the Gecamines during several decades? More specifically, what are the effects of these measures on socialization processes of youth and what are the consequences of those transformations on intergenerational dynamics? These questions that deal with the evolution of representations of childhood, work and family will be the main focus of our paper, which presents the results of a collective socio-anthropological research about child work in artisanal and small scale-mining in the Democratic Republic of Congo (Katanga province). [less ▲]

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See detailRobustesse des structures
Demonceau, Jean-François ULg

Conference (2012, October 26)

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See detailA propósito de un garabato
Jamoulle, Marc ULg

Conference (2012, October 26)

Cuando me surgió la idea de la P41, en 1986, el mundo no estaba aún globalizado. La OMS insistía todavía en una lista de medicamentos esenciales. Los países no occidentales no consumían estatinas y los ... [more ▼]

Cuando me surgió la idea de la P41, en 1986, el mundo no estaba aún globalizado. La OMS insistía todavía en una lista de medicamentos esenciales. Los países no occidentales no consumían estatinas y los Ataques de Pánico se llamaban aún Crisis de Nervios. La depresión no era aún una afección que se tratara sin interrupción, y los psicóticos recibían tratamiento farmacológico solo durante sus crisis. La habilidad de la industria de los alimentos para vender comida chatarra era mucho menos efectiva, pero el tabaco ya estaba en todos lados. [less ▲]

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See detailLa construcción de la enfermedad y la protección del paciente, una clínica de medicina familiar
Jamoulle, Marc ULg

Conference (2012, October 26)

Este texto fue escrito después de la consulta con un a paciente seguido por un episodio de luto. Al mismo tiempo, se organizó conjuntamente por médicos y psicólogos de Argentina y Uruguay un seminario ... [more ▼]

Este texto fue escrito después de la consulta con un a paciente seguido por un episodio de luto. Al mismo tiempo, se organizó conjuntamente por médicos y psicólogos de Argentina y Uruguay un seminario virtual por Internet sobre prevención cuaternaria. El texto está escrito para compartir este momento de la consulta con estos colegas. La historia de la paciente muestra cómo la transformación del dolor en la depresión por el psiquiatra también responde a una necesidad de la organización social. Es necesario que la paciente sea reconocido a "enferma" a fin de tener tiempo para hacer el duelo en circunstancias complejas de la vida que no podían ser aceptadas como una razón aceptable para un paro laboral. Texto escrito con la aprobación y participación de la paciente, traducido al español por Mónica Cortázar (Argentina) [less ▲]

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