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See detailRestricted interests in autism with versus without speech onset delay : the importance of perceptually versus thematically organized interests
Chiodo, Liliane ULg; Majerus, Steve ULg; Eusèbe, Sandrine et al

Poster (2016, May 13)

Objectives : To explore whether autistic adults with vs without speech delay also differ in the perceptual vs thematic nature of their restricted interests.

Detailed reference viewed: 25 (6 ULg)
See detailNanoparticles and microorganisms applied in groundwater decontamination
Lambert, Stéphanie ULg; Lavigne, Benoît

Conference (2016, May 13)

Detailed reference viewed: 13 (1 ULg)
See detailLa cristallurie
GADISSEUR, Romy ULg

Conference (2016, May 12)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailCombined Centralized and Local Voltage correction in Active Distribution Network
Soleimani Bidgoli, Hamid ULg

in Combined Centralized and Local Voltage correction in Active Distribution Network (2016, May 12)

This paper presents a two-level real-time voltage control scheme to address the voltage violations in distribution grids hosting a significant number of Dispersed Generation Units (DGUs). The proposed ... [more ▼]

This paper presents a two-level real-time voltage control scheme to address the voltage violations in distribution grids hosting a significant number of Dispersed Generation Units (DGUs). The proposed scheme consists of a centralized and a local reactive power control. The local control provides fast response after a disturbance, reducing its impact and enhancing voltage quality. The centralized control relies on Model Predictive Control (MPC). It uses measurements collected throughout the network to bring the voltages inside desired limits. To do so, it adjusts in a coordinated way the reactive power set-points of the DGUs taking into account the local controls. The control method effectiveness has been evaluated on a 75-bus 11-kV test system hosting 22 DGUs. [less ▲]

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See detailMolecular detection of single nucleotide polymorphisms on whole blood without DNA extraction
Detemmerman, L.; BOEMER, François ULg; SEGERS, Karin ULg et al

Poster (2016, May 12)

Detailed reference viewed: 15 (6 ULg)
Peer Reviewed
See detailCentralized Model Predictive Control of Multi-Terminal Direct Current Grids
Papangelis, Lampros ULg

in Proc. of the 8th IEEE Benelux Young Researchers Symposium 2016 (2016, May 12)

This work describes a centralized control for Multi-Terminal Direct Current (MTDC) grids. It is based on Model Predictive Control (MPC) whose aim is to satisfy a desired schedule, while avoiding or ... [more ▼]

This work describes a centralized control for Multi-Terminal Direct Current (MTDC) grids. It is based on Model Predictive Control (MPC) whose aim is to satisfy a desired schedule, while avoiding or correcting any system limit violation. The central controller collects voltage and power measurements from the converters of the system in regular intervals and sends back converter power setpoints. The latter are calculated by solving a quadratic programming problem subject to linear constraints and using a simplified model for the DC system. In addition, the overall MTDC grid control structure including the local and the centralized controllers is described. [less ▲]

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See detailSpatial Analysis of the Landslide Risk in the Cameroon Volcanic Line (CVL)
Mukenga, Williams ULg; Havenith, Hans-Balder ULg; Medjo Eko, Robert et al

Poster (2016, May 12)

Landslides are recognized as important geomorphologic process due to the role they play in the development of hill slopes in mountainous regions, and to related socio-economic consequences. There are many ... [more ▼]

Landslides are recognized as important geomorphologic process due to the role they play in the development of hill slopes in mountainous regions, and to related socio-economic consequences. There are many causes of landslides and their distribution varies with the changing conditioning factors. Slope stability depends on a number of causative factors and the knowledge of these variables can help to predict the type of landslide expected in the future. In this study, past landslide activity and triggering factors will be used to assess mass movement hazards along the Cameroon Volcanic Line (CVL). Spatial aspects will be studied in terms of landslide susceptibility maps that are important for development planning and disaster management. The current synthesis of landslide susceptibility map at regional scale is based on a literature review to inventory passed mass movement impacts, on the detection of landslide features from Google Earth imagery, combined with spatial analysis using Geographical Information Systems (GIS) and remote sensing. One of the most critical stages in landslide susceptibility mapping is the selection of landslide pre-conditioning, conditioning and triggering factors and weighting of the selected causative factors in accordance to their influence on slope stability. Google earth helps for delineating past (but recent) and present landslide activity whereas GIS is suitable when deriving static factors (slope aspect and surface curvature) and time-dependent factors (annual precipitation and changing groundwater table level) that are needed to produce landslide susceptibility maps. Landslide susceptibility mapping is based on the assumption that future landslides will occur under similar circumstances as past and present mass movements. Different methods, including the weight of evidence methods, are used for landslide susceptibility mapping along the Cameroon Volcanic line, as the area is known to be highly susceptible to landslide occurrences. [less ▲]

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See detailBildwissenschaft - Image et langage (introduction au colloque)
Hagelstein, Maud ULg

Conference (2016, May 12)

En guise d’introduction très rapide, je voudrais rappeler dans ses grandes lignes le projet auquel est liée l’organisation de ces journées de recherche. Le projet tente d’établir une archéologie de la ... [more ▼]

En guise d’introduction très rapide, je voudrais rappeler dans ses grandes lignes le projet auquel est liée l’organisation de ces journées de recherche. Le projet tente d’établir une archéologie de la théorie de l’image contemporaine, en particulier (en priorité) dans son versant germanophone, celui de la « science de l’image » (Bildwissenschaft) – discipline qui est, pour des raisons diverses (obstacle de la langue, nouveauté des problèmes, hermétisme des débats, etc.), encore peu connue chez nous. Or, me semble-t-il, l’explosion récente de la théorie de l’image (depuis les années 1990), théorie de l’image qui s’est décentrée par rapport à son milieu naturel et déployée sur de multiples territoires disciplinaires, appelle une nouvelle cartographie des études visuelles, qui reste à établir, ainsi qu’une redéfinition philosophique de l’image (ou des images) et de l’expérience qui en découle (les phénomènes visuels et iconiques étant à ce point diversifiés aujourd’hui que de nombreuses définitions sont en circulation sans que l’on perçoive toujours leur cohérence). Comme l’écrivait récemment Klaus Sachs-Hombach : « Une science générale de l’image n’a pas encore réussi à s’établir » (I, §1). L’idée de ce projet sur la Bildwissenschaft consiste donc à envisager du point de vue de la méthode les différentes approches récentes de l’image pour tenter d’identifier ce qu’elles ont en commun (c’est loin d’être évident). L’option qui me semblait pouvoir être investie dans un premier temps consiste à rapporter ces développements récents à la discipline d’interprétation des images née en Allemagne au début du XXe siècle, quelques décennies auparavant, (avec A. Warburg et surtout E. Panofsky), à savoir : l’iconologie. En effet, à mes yeux, du point de vue de son ancrage philosophique, la théorie de l’image actuelle puise ses principales ressources conceptuelles dans l’iconologie (et les problèmes théoriques qui lui sont associés). En quoi consiste ce modèle ? Pour le dire trop vite, la méthode iconologique vise principalement l’interprétation du contenu symbolique des images. Elle repose entièrement – ou en tout cas majoritairement – sur une compréhension symbolique des artefacts visuels : face à une œuvre picturale, par ex., on part bien entendu de ce qui est donné à la perception (les éléments sensibles et matériels présentés par l’œuvre), pour dégager petit à petit la signification profonde et intrinsèque de l’œuvre. Dans cette optique, l’image a donc pour vocation de délivrer un message, au même titre que le langage, mais avec des moyens différents. Or, si on tente de rapporter la Bildwissenschaft – telle qu’elle se déploie considérablement depuis quelques années – à l’iconologie, on doit admettre que ce modèle (le modèle iconologique) joue surtout négativement. Depuis la fin des années 1980, la méthode iconologique a commencé à générer chez les théoriciens de l’art et du visuel (en général), toutes sortes de réactions d’insatisfaction – voire même de franche hostilité. Et pour la plupart de ces auteurs, l’iconologie va servir de repoussoir autant que de modèle. Pour quelle raison ? Les critiques généralement adressées par les théoriciens contemporains à la méthode iconologique s’articulent le plus souvent autour du problème de la prédominance du paradigme langagier pour l’analyse des images. Or, à force de considérer trop strictement l’image sur le mode du signe qu’il faut lire et décrypter, on risque de l’assimiler purement et simplement à d’autres types de signes, notamment langagiers, et de diluer sa spécificité dans une théorie symbolique trop large. Globalement, il me semble que les différentes réactions s’accordent (ou en tout cas pourraient s’accorder) sur le fait que l’iconologie – telle qu’elle se présente dans sa version traditionnelle – doit être complétée : l’approche symbolique des œuvres doit par ex. pouvoir s’appuyer sur une attention soutenue à leurs modes de présentation (dans ce cas, les outils du « formalisme esthétique » peuvent alors être convoqués) ou à leur matérialité (les outils « phénoménologiques » peuvent idéalement venir au secours de l’analyse). En résumé, depuis la fin des années 1980, l’héritage iconologique est mis en question par des chercheurs qui – en réalité – veulent donner au concept d’iconologie un sens plus actuel et consacrent leurs efforts à l’étude de la logique des images (logique iconique), en tant qu’elle n’est pas contaminée par le modèle langagier. Autrement dit, les protagonistes de la Bildwissenschaft concernés par ces problématiques font le pari suivant : on peut étudier la logique du visuel en dehors de toute référence au langage et à sa syntaxe propre. Ils pensent pouvoir montrer en quoi une proposition visuelle diffère radicalement d’une proposition langagière. En rapportant la Bildwissenschaft à l’iconologie, on rencontre donc très vite la thématique centrale de l’iconic turn (tournant iconique), qui consiste à défendre l’idée d’une spécificité absolue de l’image à l’égard du langage. On l’a dit : Les défenseurs du tournant iconique pensent renverser la domination du paradigme langagier pour l’interprétation des images. Plutôt que de se concentrer exclusivement sur l’étude des contenus symboliques, il importe à leurs yeux de se concentrer sur ce qui fait la spécificité intrinsèque de l’image et de montrer comment sa matérialité affecte et contamine directement la production du sens. Contre la sémiotisation excessive des formes d’expression visuelle, il faudrait donc affirmer une fonction intransitive des images, c’est-à-dire redonner à l’image une épaisseur propre, qui ne renvoie qu’à elle-même. De nombreux auteurs s’inscrivent dans cette perspective (c’est le cas notamment de G. Boehm, qui veut sortir du paradigme langagier pour l’interprétation des images, ou de L. Wiesing, qui tente une définition asémantique de l’image). Les débats autour de l’iconic turn sont très particuliers et finalement difficiles à traiter. D’abord parce que l’iconic turn fait suite au linguistic turn (tournant déclaré dans la célèbre anthologie de Rorty - 1967), et appelle à sa suite d’autres tournants (on parle volontiers aujourd’hui d’un tournant anthropologique des études visuelles, comme on parle d’ailleurs aussi d’un tournant visuel de l’anthropologie, etc.). Or, ces changements radicaux de direction, ces changements de paradigme, finissent à mon avis par nous faire perdre nos repères (il y a trop de turn, pour le dire platement) et on a le sentiment de tourner en rond. Ensuite, autre difficulté : les débats liés à l’iconic turn sont souvent animés par la volonté de défendre – jusqu’à l’absurde – la valeur primordiale et la préséance absolue de l’image sur le langage. Si on s’enlise dans les positions parfois stéréotypées de ce débat, on pourra difficilement sortir du scepticisme langagier le plus stérile (l’idée que le langage manque inévitablement le caractère sensible de l’image). Pourtant, je ne voudrais pas non plus rendre trop caricatural ce débat qui m’intéresse tellement. D’un côté, j’ai l’impression qu’on y revient toujours, de l’autre, qu’on en est déjà sorti. On y revient toujours parce que ce problème continue à être essentiel pour toute une série d’auteurs qui cherchent obstinément à vouloir distinguer l’image des autres formes d’expression, à vouloir construire de nouvelles iconologies. Et l’effort qui consiste à essayer d’identifier les spécificités logiques du visuel doit sans cesse se renouveler ; les théories de la spécificité sont très fragiles parce que les contre-exemples et contre-arguments viennent très vite à l’esprit dès qu’il s’agit de séparer les pouvoirs de l’image et du langage. Dès que quelqu’un dit : « l’image fait ceci que le langage ne fait pas », on trouve quelqu’un d’autre pour répondre : « comment ? Mais si, le langage fait ça aussi ». Néanmoins, si on dégage peu de certitudes, de points fixes, ces débats sont loin d’être stériles (pour le dire vite : on a l’impression tout de même d’augmenter notre connaissance des images en traversant ces discussions). On y revient donc toujours mais en même temps on en est déjà sorti (et presque toujours déjà sorti) : aujourd’hui, on rencontre de multiples propositions, qui émanent soit du champ de la Bildwissenschaft lui-même, soit de l’extérieur (et parfois même très en amont de ces débats), et qui présentent des modèles plus complexes et nuancés qui n’opposent pas frontalement image et langage. Mais qui font l’effort de penser leur complémentarité. Et en réalité, ces efforts nous donnent à penser que la séparation des pouvoirs de l’image et du langage est peut-être très artificielle – ou en tout cas fragile – dans certains cas, mais qu’elle continue à être utile. [less ▲]

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See detailAccurate measurement of radius evolution as a function of direction in 3D images
Plougonven, Erwan ULg; Hubert, Julien ULg; Collin, Frédéric ULg et al

Poster (2016, May 11)

Very often the reason for using of X-Ray tomography in a research project is to measure the evolution of some geometrical characteristic. The sought characteristic may be explained in simple words like ... [more ▼]

Very often the reason for using of X-Ray tomography in a research project is to measure the evolution of some geometrical characteristic. The sought characteristic may be explained in simple words like size, shape, or distance, but in practice measures based on these notions can have a complex implementation. We present a simple problem, measuring the evolution of radius in a cylindrical sample (a common shape for sample preparation for tomography) and how this value differs according the direction in which we look, when such evolution is known to be anisotropic. The solution is not unique, but we show that a naïve manual approach are not accurate enough, and how even a simple geometric notion such as radius needs a thorough definition in relation to its applicability to 3D image analysis. We extend the argument to how a good understanding of the notions and algorithms used in the quantification of geometrical characteristics can directly affect the pertinence and representativity of the results. [less ▲]

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See detailRecollection and Familiarity in Normal Aging
Simon, Jessica ULg; Gilsoul, Jessica ULg; Bastin, Christine ULg

Conference (2016, May 11)

Detailed reference viewed: 19 (2 ULg)
Peer Reviewed
See detailModelling nitrogen incorporation by primary producers of a Mediterranean coastal area
Elkalay, Khalid; Frangoulis, Constantin; Richir, Jonathan ULg et al

Conference (2016, May 11)

The aim of this study was to simulate the uptake flow of nitrogen (gN m-2) of P. oceanica meadow for 4 primary producers of the bay of Calvi (Corsica, France) (phytoplankton, macro-algae, the Posidonia ... [more ▼]

The aim of this study was to simulate the uptake flow of nitrogen (gN m-2) of P. oceanica meadow for 4 primary producers of the bay of Calvi (Corsica, France) (phytoplankton, macro-algae, the Posidonia oceanica leaves and their epiphytes). The model developed for this purpose simulates the evolution of nitrogen incorporation. The effect of the light intensity, and the water column temperature and concentration in internal and external nitrogen on nitrogen incorporation by the 4 primary producers is modeled. Thus, the incorporation rate of both NO3-and NH4+by phytoplankton was more important than for benthic producers. Macro-algae incorporations had intermediate incorporation rates between the ones of, the phytoplankton and P. oceanic leaves and their epiphytes. The incorporation of NH4+ by the phytoplankton is higher than the incorporation of NO3-. The model appears well adapted to establish the main environmental factors that determine the incorporation of inorganic nitrogen by the various primary producers. It is also able to represent the relative importance of nitrogen incorporation by the various producers. [less ▲]

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See detailAssociation of Targeted metagenomic analysis and classical microbiology for Clostridium difficile detection and microbial ecosystem mapping of surfaces hands and foodstuffs in a meat processing plant
Rodriguez Diaz, Cristina ULg; Oukbir, Meriem; Taminiau, Bernard ULg et al

Poster (2016, May 11)

INTRODUCTION Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test positive ... [more ▼]

INTRODUCTION Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test positive for the bacterium, it seems plausible that C. difficile could be zoonotic. PURPOSE This study aimed to determine the prevalence and the epidemiology of C. difficile in cattle farms and the possible spread of the bacterium among animals and farmers. METHODS A total of 176 faecal samples of cattle were collected from 5 different Belgian farms. A stool sample of each farmer was also requested. Detection of C. difficile was performed by classical culture on C. difficile selective medium (cycloserine cefoxitin fructose cholate). Isolates were characterised by PCR-ribotyping and Genotype Cdiff test (Hain Lifescience), which allows the detection of all toxin genes, mutations in gyrA gene and the deletion in the regulator gene tcdC. RESULTS C. difficile was detected in 14/178 (7.9%) animal samples. Isolates were grouped into five different types, including PCR-ribotype 015. All of them were identified as toxigenic. In contrast, none of the 5 farmers studied were positive for the bacterium. SIGNIFICANCE Results obtained indicate that PCR-ribotypes commonly isolated from hospitalised patients are also present in cattle, indicating an animal reservoir. However, a zoonotic transmission could be not demonstrated in the farms studied. [less ▲]

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See detailOzone concentration and CO2 flux monitoring in a belgian forest
Hurdebise, Quentin ULg; Bergmans, Benjamin; Aubinet, Marc ULg

Poster (2016, May 11)

Temperate forests, as other ecosystems and oceans, mitigate the accumulation in the atmosphere of CO2, the main responsible for the current climate change. It is, therefore, a necessity to understand how ... [more ▼]

Temperate forests, as other ecosystems and oceans, mitigate the accumulation in the atmosphere of CO2, the main responsible for the current climate change. It is, therefore, a necessity to understand how these forests react and will react in a changing environment. That requires long-term monitoring of the environment. Tropospheric ozone is one parameter to monitor as it affects the forest by inducing oxidative stress once inside the leaves. Using 16 years of continuous data from an air quality monitoring station managed by the ISSeP (Institut Scientifique de Service Public) located in a mixed forest in east Belgium, we identified ozone concentration extreme events and we investigated their occurrence frequency as well as their relation with climatic variables and air components. As variables are subjected to daily, yearly and inter-annual dynamics, anomalies were used to detect extreme events. To obtain anomalies, we removed the previously mentioned dynamics from half-hourly raw data. Daily and yearly dynamics were removed first and explained 40% of the variability observed in half-hourly ozone concentrations. Then, the inter-annual dynamic was obtained by computing the yearly mean of the residuals, it accounted for 2% of the variability observed. A significant (p<0.01) decreasing trend was observed for these residuals. Determining if that trend is site specific or regionally observed can be done by applying the same analysis to the other sites from the network managed by the ISSeP. No significant trend in the yearly frequency and intensity of extreme events was observed. We used a stepwise regression to identify the variables that explain these extreme events. Significant relations were found between ozone concentration and climatic variables (vapor pressure deficit, temperature, radiation and wind direction) as well as other air components concentration (NO2, NO, NOX, CO). The next step will be to estimate the forest capacity to uptake ozone in order to predict ozone-induced damage and compared it to the CO2 uptake and H2O emissions measured in an ICOS site, the Vielsalm Terrestrial Observatory, located in the same forest at less than 300 meters from the air quality monitoring station. [less ▲]

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See detailLes normes étatiques relatives à la modération des rémunérations et le droit de négociation collective
Kéfer, Fabienne ULg

Conference (2016, May 10)

Les récentes lois des 23 et 28 mars 2015 fixant la marge d'évolution du coût salarial et organisant un saut d'index empêchent les partenaires sociaux de fixer librement l'évolution des salaires. Ces lois ... [more ▼]

Les récentes lois des 23 et 28 mars 2015 fixant la marge d'évolution du coût salarial et organisant un saut d'index empêchent les partenaires sociaux de fixer librement l'évolution des salaires. Ces lois sont-elles ou non conformes aux dispositions supralégislatives? [less ▲]

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See detailRéférentiels psychopédagogiques en Belgique francophone: un outil de professionnalisation ?
Pirard, Florence ULg

Conference (2016, May 10)

L'élaboration d'un curriculum pour les services d'accueil des jeunes enfants constitue l'un des leviers pour une qualité de services (OECD 2001, 2006, 2012). Elle pose ensuite la question de l ... [more ▼]

L'élaboration d'un curriculum pour les services d'accueil des jeunes enfants constitue l'un des leviers pour une qualité de services (OECD 2001, 2006, 2012). Elle pose ensuite la question de l'accompagnement de sa diffusion dans une visée de professionnalisation, et non de standardisation. [less ▲]

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See detailImplementing principles of Quality by Design (QbD) in validation context
Hubert, Cédric ULg; Lebrun, Pierre ULg; Rozet, Eric et al

Conference (2016, May 10)

Analytical method performances have to be specified by the analyst trough the definition of the “Analytical Target Profile (ATP)”, as proposed by the regulatory bodies. In the specific context of the ... [more ▼]

Analytical method performances have to be specified by the analyst trough the definition of the “Analytical Target Profile (ATP)”, as proposed by the regulatory bodies. In the specific context of the pharmaceutical industry, regulatory authorities have recently imposed the assessment and management of risk throughout the entire product lifecycle. This includes the analytical procedure and consequently its own lifecycle. The development step of an analytical method is still largely addressed using a “Changing One Separate Factor a Time (COST)” approach (also known as the “Quality-by-Testing (QbT)” approach). This strategy can lead to a suitable method for assessing the risk of routine use, even where the experimental domain is not examined. However, in order to consider an experimental domain rather than a set of specific experimental conditions during the development phase, a multivariate approach must be considered: the “Quality-by-Design (QbD)” strategy. This strategy allows the definition of a “Design Space (DS)” by means of design of experiments (DoE). This DS, computed considering critical method parameters, allows the analyst to focus on the main objective of an analytical method: obtaining reliable results using a robust method. In the course of a specific case study, the benefits of the QbD strategy in terms of managing the qualitative part of the analytical process were highlighted. Working in the context of analytical procedure, the validation step is a major part of the analytical method lifecycle. Indeed, the objective of analytical method validation is to demonstrate that this method is suited for quantifying the target analytes with an established and suitable level of accuracy, as defined by the “ATP”. This is sometimes called the “fit-for-future-purpose” concept. The decision regarding the validity of a method based on prediction can be achieved by using the “β-expectation tolerance interval” (accuracy profile). The capability of this approach to manage the quantitative part of the analytical procedure is nowadays largely illustrated in scientific literatures. Considering the assessment and management of risk throughout the analytical lifecycle, a global strategy allowing the unification of the development and validation phases in a single step was considered. With this innovative approach, a strategy allowing the management of global analytical risk (i.e., for both qualitative and quantitative part of the analytical method) was proposed. Indeed, the developed strategy allows validating an entire experimental domain by means of the accuracy profile rather than a single set of specific experimental conditions. With this strategy, the DS is no longer simply the place where qualitative performances are obtained, but also the space where quantitative performances of the analytical procedure are assessed and managed. [less ▲]

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See detailThe influence of COMT single nucleotide polymorphism (rs4680) on the neural substrates of working memory representations maintenance in healthy aging
Manard, Marine ULg; François, Sarah ULg; Bahri, Mohamed Ali ULg et al

Poster (2016, May 10)

The COMT val108/158met polymorphism was associated to the dopaminergic modulation in the brain, and therefore stimulated research on its influence for cognitive functioning and particularly working memory ... [more ▼]

The COMT val108/158met polymorphism was associated to the dopaminergic modulation in the brain, and therefore stimulated research on its influence for cognitive functioning and particularly working memory. First, a general advantage of carrying the met allele was reported. However, many studies used tasks that did not allow efficiently assessing the contribution of manipulation and maintenance processes in working memory, leading to divergent results, in both young and older populations, resulting in debates about the exact phenotypic effect of the COMT polymorphism. Using fMRI, this study was designed to assess the potential effect of the COMT polymorphism on age-related differences in working memory representations maintenance abilities (Sternberg paradigm). Partial Least Squares method was used to determine the brain-behavior correlations at low, intermediate, and high cognitive demands among young and older groups, homozygous for the val or for the met allele. First, young val/val showed some disadvantages at brain and behavioral level compared to their m/m counterparts. However, in older adults subgroups, the m/m participants tended to show greater age-related difference (when compared to younger adults with similar genotype), suggesting an advantage in carrying the val allele when dopamine signaling is not at optimal efficiency (optimal: young/middle adulthood vs suboptimal: childhood or older ages). These results will be discussed in regard to compensating theories and dopaminergic models accounting for the potential effect of COMT polymorphism on stability/flexibility abilities. [less ▲]

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See detailDe l’usage des « carnets de recherche » accompagnant la parution des revues sur OpenEdition
Mayeur, Ingrid ULg

Conference (2016, May 10)

Les portails de diffusion des revues numériques en sciences humaines permettent la communication d’annonces, billets et actualités lié aux périodiques édités. Ces genres textuels sont soit pris en charge ... [more ▼]

Les portails de diffusion des revues numériques en sciences humaines permettent la communication d’annonces, billets et actualités lié aux périodiques édités. Ces genres textuels sont soit pris en charge par le site même de la revue, soit diffusés sur un blog d’accompagnement – qui peut également jouer un rôle de veille scientifique, de réflexion et d’échange. Dans le cadre de ma recherche doctorale sur les modes de circulation du savoir au sein des plateformes numériques de la recherche en sciences humaines, je voudrais étudier au moyen des outils classiques d’analyse du discours, de l’étude des écrits d’écran et des processus d’éditorialisation les spécificités des textes véhiculés sur ces blogs, et leur complémentarité avec le site de la revue. Comment le portail de diffusion contraint-il la publication de textes liés à la revue? Quels sont les genres textuels mis en œuvre dans l’accompagnement d’un périodique ? De quelle manière l’actualité (annonce de parution, appel à contribution) se voit-elle corrélée au contenu même du périodique ? Mon étude portera essentiellement sur la plateforme OpenEdition, et les carnets de recherche Hypotheses accompagnant une revue en ligne diffusée sur Revues.org. J’observerai aussi, de manière contrastive, la gestion de ces flux d’actualité par un autre portail, Erudit.org. [less ▲]

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See detailLes outils géomatiques dans le projet ExTraCar
Cornet, Yves ULg

Conference (2016, May 09)

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See detailHow to specify the environmental footprint of electricity? A methodological approach
Belboom, Sandra ULg; Léonard, Angélique ULg

Conference (2016, May 09)

When assessing the environmental footprint of a product or an industrial process, ma-jor impacts in climate change and resources depletion are usually linked to direct or indi-rect energy consumptions ... [more ▼]

When assessing the environmental footprint of a product or an industrial process, ma-jor impacts in climate change and resources depletion are usually linked to direct or indi-rect energy consumptions. Focusing on electricity generation, largely dispersed results can appear for the concerned impact categories depending on the energy mix taken into account. An accurate knowledge of the mix is of major importance for the prediction of the environmental footprint of electricity. As this mix changes from one country to another and through time, regular update is needed to obtain an accurate value of impact for the studied product. Another criteria to also take into account is the specific technology used to generate electricity depending on the primary energy (gas, coal, uranium, sun, wind, etc.). This study aims to generate a simplified tool, containing sufficient data to assess, within a range of 10 % uncertainty, the value of the environmental footprint of electricity, based on a limited amount of accessible parameters. The global life cycle of electricity generation is taken into account, from the resources extraction to the end-of-life. This is essential to be able to compare, on a same basis, the renewable and classical resources for electricity generation. The functional unit of this study for numerical applications is 1 MWhe. To achieve our goal, the following methodological approach has been pursued. First, the energy mix for electricity generation has been collected trough years for different countries. Then a deeper study of specific technologies relative to each kind of primary energy consumption has been performed. Meta-analyses relative to LCA results have been studied to highlight the main important criteria of these technologies. Then, the amount of needed data for the environmental assessment of these technologies has been reduced to the main important ones. The step further is about the use of these data to obtain an available tool to predict the environmental footprint of electricity depending mainly on the energy mix and used technologies. The environmental impact of 1 MWhe can then be easily calculated using this tool in several categories as climate change, acidification, ozone layer depletion, etc. using the ILCD method. Concerning the resources depletion assessment, all available methodolo-gies have been studied with a specific focus on the CEENE method using an exergetic assessment of resources. This method allows the highlighting of the use of energy and all types of resources (fossil, renewable like wind, sun or land). This perspective can also be used to discriminate several resources for the electricity production. A comparison of the results obtained using resources impact methods has then been performed and some challenges concerning the use of existing impact pathways have been highlighted as well as some perspectives to tackle them. This research has been supported by the Public Service of Wallonia – Department of Energy and Sustainable Building within the framework of the ECEB project [less ▲]

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See detailEstetrol, a natural SERM exhibiting combined estrogenic and antiestrogenic properties on mammary gland and breast cancer
Gérard, Céline ULg; Gallez, Anne ULg; BLACHER, Silvia ULg et al

Conference (2016, May 09)

The increased risk of breast cancer and thromboembolism in women who take Hormone Replacement Therapy (HRT) currently is a major public health problem. The discovery of novel molecules with better safety ... [more ▼]

The increased risk of breast cancer and thromboembolism in women who take Hormone Replacement Therapy (HRT) currently is a major public health problem. The discovery of novel molecules with better safety profile would provide useful advances for patient care. Estretrol (E4) appears as a promising candidate for HRT. Indeed, in contrast to current treatment containing ethinyl estradiol or estradiol (E2), E4 has a minimal impact on liver cells activity supporting a decreased incidence on thromboembolic events. In preclinical studies, E4 has been effective against the main symptoms of menopause such as hot flushes, vaginal atrophy, and osteoporosis, from a starting dose of 0.3 mg/kg/day. The aim of this study was to define the impact of E4 on mammary gland and breast cancer development when it is used at concentrations effective for menopause symptom relief. We report preclinical data showing that E4 is less efficient than E2 to induce mammary gland growth. Treatment of estrogen receptor (ER)-positive breast cancer with several concentrations of E4 has shown that 0.3 mg/kg/day E4 did not increase tumor development. However, at 3mg/kg/day, E4 increased the growth of hormone-dependent tumors and their metastatic dissemination in ovariectomized and intact mice. This effect was similar to the one observed with E2 used at 0.08 mg/kg/day. E4 presents also some anti-estrogenic effects on mammary gland and antitumor activity on breast cancer by decreasing the strong proliferative effect of E2. While ERα is the predominant receptor mediating its effects, the dual weak-estrogenic/anti-estrogenic feature of E4 results from differential signaling pathways activation. Both nuclear and rapid extranuclear signaling pathways are necessary for a complete estrogenic effect of E4. However, the antitumor action of E4 is not due to a capacity to antagonize E2-induced nuclear activity. In conclusion, our results support that E4, if it is used in strictly controlled clinical applications, could have no or only limited impact on breast and breast cancer. [less ▲]

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See detailDepositional Sequences of the Late Pleistocene Shoreline System, Bor Basin, Southern-Central Anatolia: Implications for Reconstructing Lake Level Changes
Bayer Altın, Türkan; El Ouahabi, Meriam ULg; Fagel, Nathalie ULg

Conference (2016, May 08)

The Bor Basin is located in the east part of the Konya-Ereğli Plain occupied by Pleistocene lake (Fig. 1). Paleo-shoreline deposits rising western margins of the basin marked the former extent of a now ... [more ▼]

The Bor Basin is located in the east part of the Konya-Ereğli Plain occupied by Pleistocene lake (Fig. 1). Paleo-shoreline deposits rising western margins of the basin marked the former extent of a now desiccated Late Pleistocene Lake. This study evaluates the former lake level changes and the sequential evolution of a shoreline system that developed at the western margin with lacustrine fills of the Bor paleolake near Zengen settlement. The fills belongs to alluvial fans formed by streams coming from the high volcanic mountains located within the northern part of the basin. The sediment sequence of the fan reflects receded and extended levels of the former lake. 23 samples were obtained at the sand-quarry representing of various facies of the lacustrine fills. These samples were analyzed for mineralogical characterization, using XRD and their CaCO3 values were quantified. According to analysis, three evident different phases of weathering were distinguished in this deposit (Fig. 2). Weathering conditions occurred at the bottom of the profile (level 7) with the appearance of the vermiculite and illite/smectite mixed layer clays. Aridification phases occurred at the level of sample 16 with the appearance of the palygorskite. At the shallow levels from the samples 21 to 22, another aridification phase occurred attested by the appearance of the palygorskite, the mixed layers clays (illite/smectite) and the neoformation of the chlorite by weathering. The palygorskite occurrence showed only in the clay fraction (<2µm) associated with dolomite levels which support its secondary formation during dry periods and pedogenetic transformation. Pedogenesis conditions were attested also by the presence of the mixed layers clays at those levels. [less ▲]

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See detailOn the Laser Cladding of Ti Alloy Ti-6Al-4V with Low Laser Power
Mertens, Anne ULg; Paydas, Hakan ULg; Tchuindjang, Jérôme Tchoufack ULg et al

in Ventakesh, V.; Pilchak, A.L.; Allison, J.E. (Eds.) et al Proc. of the 13th World Conference on Titanium (2016, May 06)

Laser cladding is an economic layer-by-layer near-net-shape process for the production and the repair of metallic parts. In this process, a metallic powder is projected onto a substrate while being molten ... [more ▼]

Laser cladding is an economic layer-by-layer near-net-shape process for the production and the repair of metallic parts. In this process, a metallic powder is projected onto a substrate while being molten by a laser beam. Laser sources with fairly high power – i.e. typically 2kW − are often used to ensure short building times and high productivity. However, this approach has limitations. Indeed, it is very difficult to produce thin walls at high laser power. Moreover, an increase of the incident energy may give rise to a relatively coarser microstructure, and this will in turn affect the mechanical properties of the component. In order to address these issues, this paper aims at assessing the potential of a laser source with a lower maximum power of 300W to enhance the flexibility of the process. Two types of samples – i.e. thin walls or bulk deposits − were produced at low laser power from alloy Ti-6Al-4V. Their geometry, microstructures and local hardness are characterised and correlated with the thermal history experienced during fabrication. [less ▲]

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See detailLes types de fief dans la principauté de Liège suivant Charles de Méan
Lagasse, Benoît ULg

Conference (2016, May 06)

La présentation tend à mettre en évidence les différentes catégories de fief existant dans la principauté de Liège suivant le juriste liégeois du 17e siècle Charles de Méan et à comparer les distinctions ... [more ▼]

La présentation tend à mettre en évidence les différentes catégories de fief existant dans la principauté de Liège suivant le juriste liégeois du 17e siècle Charles de Méan et à comparer les distinctions opérées en droit liégeois avec celles faites par d'autres droits de la même époque. [less ▲]

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See detailCatégoriser les effets autodéclarés de la formation technico-pédagogique des enseignants – La grille de codage CInOpTIC
Van de Poël, Jean-François ULg; Verpoorten, Dominique ULg

Conference (2016, May 05)

Cette communication présente une démarche de conception, de validation et d’utilisation d’une grille de codage destinée à aider le centre d’enseignement et d’apprentissage de l’Université de Liège (IFRES ... [more ▼]

Cette communication présente une démarche de conception, de validation et d’utilisation d’une grille de codage destinée à aider le centre d’enseignement et d’apprentissage de l’Université de Liège (IFRES-ULg – Belgique) à repérer les effets des séances de formation technopédagogique qu’il donne à plus de 150 enseignants par an dans le cadre des formations pédagogiques obligatoires pour les nouveaux encadrants. Le matériel qui a servi à cette démarche est constitué des rapports réflexifs rédigés par les participants à la fin de leur cycle de 30 h de formation (plus de 380 rapports ont été analysés sur une période de 3 ans). CInOpTIC est passé par un processus de validation mené avec 6 conseillers pédagogiques de divers horizons. Elle impliquait une série de mouvements de va-et-vient entre les données et les tentatives de catégorisation. L’acronyme CInOpTIC englobe 3 types d’effets trouvés dans les rapports : la prise de Conscience (sensibilisation), l’intention (de l’utilisation de l’apprentissage amélioré par la technologie), et l’opérationnalisation (mesures déjà prises) concernant les TIC. Le processus de validation a également enrichi chaque type d’effet avec des critères de définition plus pointus qui devraient faciliter encore davantage son utilisation future. [less ▲]

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See detailGender, Jobs and Empowerment in Vietnamese Small Enterprises of Traditional Handicraft: Case Study in the Periphery of Hanoi
Nguyen, Thi Thu Hien ULg; Lebailly, Philippe

in The 2nd World Conference on Women’s Studies WCWS - 2016, 5th – 6th May, 2016 Colombo, Sri Lanka (2016, May 05)

Women are the main workforce of traditional craft sector in Vietnam. They not only actively participate in production, but also succeed in leading enterprises as managers. Even though women contribute ... [more ▼]

Women are the main workforce of traditional craft sector in Vietnam. They not only actively participate in production, but also succeed in leading enterprises as managers. Even though women contribute much to the achievement of companies, they face many constraints in working places due to theories of Confucianism and Buddhism. This research aims at answering two questions: (i) whether or not gender inequality exists in small scale craft enterprises and, (ii) how is empowerment the women employees in the firms. Both qualitative and quantitative methodologies are applied to collect information in order to clarify the research questions. Qualitatively, ethnographic approach is employed. It is explained that since 2014 the researchers go to the study areas to survey employment in the enterprises. In addition, participatory observation and oral history recording were also used to collect information (evidence) of gender inequality in employment and women empowerment in rural companies. Cross checking and supplementing were used for gathering information from communal leaders, women unions’ leaders and local residents. Quantitatively, descriptive statistics were used to analysis labor force, gender and employment of 50 enterprises in 3 traditional artisanal communes in Vietnam to find out gender inequality. Based on the result of analysis, some policy implications will be recommended to empower women as well as to reduce gender inequality in the small enterprises in rural areas [less ▲]

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See detailInvestigations around an unrecognized genre: case study on speech captions in private tombs
Motte, Aurore ULg

Conference (2016, May 05)

Since the Old Kingdom, speech captions, generally known as “Reden und Rufe”, are found in the decorative program of private tombs. These captions are dialogs between workers in the “daily life” scenes ... [more ▼]

Since the Old Kingdom, speech captions, generally known as “Reden und Rufe”, are found in the decorative program of private tombs. These captions are dialogs between workers in the “daily life” scenes. They appear in several topics, such as fishing, butchery, crafts, ... Quite surprisingly, they have never been studied exhaustively since their first mention in 1918 in Egyptological literature. My first goal is twofold: to show precisely where and when they are found, and what exactly defines “Reden und Rufe” as a genre. Besides, a chronological scope of nearly 2,300 years allows me to highlight diachronic, diatopic, and diastratic variations. It is particularly evident in New Kingdom and Late Period tombs, where “Égyptien de Tradition” features are found next to “vernacular” ones. It has long been taken for granted, incorrectly, that these speeches were written in an idiom very close to colloquial. This first comprehensive study aims to determine which state(s) of language is/are used. [less ▲]

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See detailConclusions du séminaire
Francois, Jeromine ULg; Regibeau, Julien ULg

Conference (2016, May 04)

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See detailUne phénoménologie clinique du Rorschach : des masques et un malentendu
Englebert, Jérôme ULg

Conference (2016, May 04)

Afin d’évoquer la dimension phénoménologique intrinsèque du test de Rorschach, je propose de partir de l’ouvrage magistrale de Roland Kuhn Phénoménologie du masque à travers le test de Rorschach (1957) et ... [more ▼]

Afin d’évoquer la dimension phénoménologique intrinsèque du test de Rorschach, je propose de partir de l’ouvrage magistrale de Roland Kuhn Phénoménologie du masque à travers le test de Rorschach (1957) et des commentaires livrés à son propos par Gaston Bachelard et Jean Starobinski. Ce premier temps me permettra de « démasquer » une épistémologie, œuvrant en sourdine tant dans le test que dans la phénoménologie, celle des visages. Passant ensuite par Foucault – à travers son énigmatique attrait pour le test de Rorschach et sa fascination, toute son œuvre durant, pour les masques – j’interrogerai les notions d’autoréflexion (Foucault, 1966) et d’hyper-réflexivité (Sass, 1994) telles qu’elles se manifestent dans la clinique du patient schizophrène. Le second temps de mon exposé s’intéressera dès lors aux étranges réponses fournies par ces patients au test des taches d’encre lorsqu’ils expriment précisément : « ce ne sont que des taches ». Cette proposition, qui se révèle plus exacte qu’il n’y parait, révèle le malentendu visuel sur lequel repose le Psychodiagnostik de Rorschach. L’observation de ce malentendu nous permettra de conclure que le sujet, lorsqu’il est en « situation Rorschach », doit accepter implicitement le jeu paradoxal consistant à fournir une « fausse perception » et à tolérer un certain degré de violation de la réalité. [less ▲]

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See detailCritique des critiques. La crise de la légitimité des journalistes spécialisés en cinéma.
Krywicki, Boris ULg

Conference (2016, May 04)

Bien avant l'avènement d'internet, les critiques cinéma se questionnaient déjà sur la légitimité de leurs jugements. Une table ronde, appelée "Point Critique", s'est interrogée sur leur rôle, la ... [more ▼]

Bien avant l'avènement d'internet, les critiques cinéma se questionnaient déjà sur la légitimité de leurs jugements. Une table ronde, appelée "Point Critique", s'est interrogée sur leur rôle, la pertinence de leur position d'intermédiaire entre distributeurs et spectateurs. A l'ère du numérique, cette crise semble d'autant plus prégnante. Plusieurs circuits fermés de l'évaluation se sont développés sur le web. Les amateurs échangent leurs propres avis en leur sein, affranchis des interventions des critiques professionnelles. Comment la critique de la presse traditionnelle - qui cherche à convaincre le plus de public possible - gère-t-elle cette crise de la légitimité de ses auteurs ? [less ▲]

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See detailFrontières sociales et culturelles dans l’imaginaire du Front national
Debras, François ULg

Conference (2016, May 04)

En luttant contre les bureaucrates et les technocrates de Bruxelles, contre la caste politique nationale, contre la société multiculturelle et l’islamisation de la société, le Front national se présente ... [more ▼]

En luttant contre les bureaucrates et les technocrates de Bruxelles, contre la caste politique nationale, contre la société multiculturelle et l’islamisation de la société, le Front national se présente comme le véritable représentant du peuple français, de ses intérêts mais également de ses valeurs, de ses habitudes et traditions. Dans son « Projet pour la France et les Français », Marine Le Pen souhaite rompre avec le système en place en proposant une alternance démocratique en (re)donnant le pouvoir de décision et d’action au peuple. Aussi, nous nous posons la question suivante : à quel imaginaire renvoie la notion de peuple au sein de la rhétorique frontiste ? Dans quels contextes le peuple est-il invoqué et à quelle réalité fait-il référence ? Quelles sont ses caractéristiques et quels sont ses « ennemis » ? [less ▲]

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See detailEchographie nerveuse
Kaux, Jean-François ULg

Conference (2016, May 03)

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See detailFirst principles study of heavily doped full Heusler Fe2YZ for high thermoelectric power factor
Lemal, Sébastien ULg; Ghosez, Philippe ULg; Bilc, Daniel ULg

Poster (2016, May 02)

Using a combination of first-principles calculations based on density functional theory and Boltzmann semi-classical transport theory, we investigate the properties of heavily $n$-type doped full Heusler ... [more ▼]

Using a combination of first-principles calculations based on density functional theory and Boltzmann semi-classical transport theory, we investigate the properties of heavily $n$-type doped full Heusler Fe2YZ1-xAx compounds. Using a supercell approach and including explicitly the dopant impurities, we recover in some cases giant thermoelectric power factors as previously predicted under doping within the rigid band approximations [Phys. Rev. Lett. 114, 136601 (2015)]. In other cases, however, we highlight that the system evolves toward a ferromagnetic half-metallic ground state so that the power factor is strongly modified. We rationalize the appearance of this magnetic instability, showing that it consistent with the Stoner model. The uncovered properties of the heavily doped phases of the studied Fe2YZ1-xAx compounds appear promising for Seebeck and spin-Seebeck applications. [less ▲]

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See detail188Re and 68Ga radiolabeled Starch-Based Microparticles as potential theranostic radiopharmaceutical for Hepatocellular Carcinoma
Verger, Elise ULg; Drion, Pierre ULg; MEFFRE, Geneviève ULg et al

in Journal of Nuclear Medicine (The) (2016, May 01), 57(suppl. 2),

The SBMP as a unique vector is a promising theranostic agent for the SIRT of HCC.

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See detailCrystallization behavior of neutralized and bleached shea butter under dynamic conditions
Gibon, V.; Dijckmans, P.; Blecker, Christophe ULg et al

Poster (2016, May 01)

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See detailFucoidan: a marine polysaccharide for SPECT diagnosis of thrombosis
Chollet, Lucas; Saboural, Pierre; Rouzet, François et al

in Frontiers (2016, May)

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See detailRoof Frames in the Buit Heritage of Brussels (Belgium): The contribution of dendrochronology and written sources
Weitz, Armelle ULg; Charruadas, Paulo; Fraiture, Pascale et al

in Tree Rings in Archaeology, Climatology and Ecology (2016, May), 14

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See detailUne poétique du visuel. Arlette Farge entre l'image et le texte
Servais, Amandine ULg

Conference (2016, May)

Les interrogations des théories contemporaines sur l’image et le visuel me permettent de comprendre l’agence historiographique de l’image. En mettant au jour l’originalité de la procédure fargienne ainsi ... [more ▼]

Les interrogations des théories contemporaines sur l’image et le visuel me permettent de comprendre l’agence historiographique de l’image. En mettant au jour l’originalité de la procédure fargienne ainsi que les éléments qui, à mes yeux, la caractérisent, il apparaît que l’image, chez Farge, constitue un modèle épistémique ; elle informe la procédure et, de facto, l’écriture historiennes. Partant, et par une sorte d’effet retour, la pratique singulière d’Arlette Farge pose, de manière renouvelée, une question centrale pour les théories du visuel : les rapports entre visible et dicible, entre « logique » de l’image et « logique » langagière, autrement dit entre ce qui échapperait à la narration et ce qui, au contraire, appartiendrait totalement au régime narratif. [less ▲]

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See detailDeep Background Subtraction with Scene-Specific Convolutional Neural Networks
Braham, Marc ULg; Van Droogenbroeck, Marc ULg

in International Conference on Systems, Signals and Image Processing, Bratislava 23-25 May 2016 (2016, May)

Background subtraction is usually based on low-level or hand-crafted features such as raw color components, gradients, or local binary patterns. As an improvement, we present a background subtraction ... [more ▼]

Background subtraction is usually based on low-level or hand-crafted features such as raw color components, gradients, or local binary patterns. As an improvement, we present a background subtraction algorithm based on spatial features learned with convolutional neural networks (ConvNets). Our algorithm uses a background model reduced to a single background image and a scene-specific training dataset to feed ConvNets that prove able to learn how to subtract the background from an input image patch. Experiments led on 2014 ChangeDetection.net dataset show that our ConvNet based algorithm at least reproduces the performance of state-of-the-art methods, and that it even outperforms them significantly when scene-specific knowledge is considered. [less ▲]

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See detailPermutations and negative beta-shifts
Charlier, Emilie ULg; Steiner, Wolfgang

Conference (2016, May)

Elizalde (2011) characterized which permutations can be obtained by ordering consecutive elements in the trajectories of (positive) beta-transformations and beta-shifts. We prove similar results for ... [more ▼]

Elizalde (2011) characterized which permutations can be obtained by ordering consecutive elements in the trajectories of (positive) beta-transformations and beta-shifts. We prove similar results for negative bases beta. [less ▲]

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See detailINFLUENCE OF LOCAL BUCKLING ON THE SHEAR RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
D'Antimo, Marina ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses ... [more ▼]

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses the bearing failure of shear joint using long bolts through thin tubular members with the purpose to check the reliability of Eurocode 3 formulation. The used hollow sections are free to buckle inward leading to a bearing resistance lower than the one predicted using EC3. In fact EC3 does not account for the possible occurrence of out-of-plane deformations in shear connection assuming that the connected plates are restrained by the bolt head and the nut. In order to investigate this phenomenon, an experimental campaign has been developed, a FE model Abaqus/CAE has been validated and a parametric study has been performed. The present paper introduces the conducted investigations. [less ▲]

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See detailGenetic predisposition to breast cancer occurring in a male-to-female transsexual patient
Potorac, Iulia ULg; CORMAN, Vinciane ULg; Manto, Florence et al

Poster (2016, May)

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See detailMicroplastics contamination in three planktivorous and commercial fish species
Collard, France ULg; Das, Krishna ULg; Gilbert, Bernard ULg et al

Poster (2016, May)

In 2014, 311 million tonnes of plastics were produced worldwide while it is estimated that 10% ended up in the oceans. Plastics adsorb many pollutants, cause entanglements in many vertebrates and provoke ... [more ▼]

In 2014, 311 million tonnes of plastics were produced worldwide while it is estimated that 10% ended up in the oceans. Plastics adsorb many pollutants, cause entanglements in many vertebrates and provoke blockage of the digestive tract of marine mammals, birds and turtles. Plastics also fragment in smaller parts, forming microplastics (<5 mm). These microplastics have the same size than planktonic organisms and can thus be ingested by filter-feeders and planktivorous organisms including fish. Although planktivorous Clupeiforme species are the most fished species in the world (17 million tonnes in 2013), the possible impact of microplastic ingestion on this group has received little attention. The aim of this study was to quantify and to characterize the ingested anthropogenic particles (AP) in herrings (Clupea harengus), sardines (Sardina pilchardus) and anchovies (Engraulis encrasicolus). Twenty individuals of each species were sampled. Herrings and sardines were caught in the Channel and in the North Sea in January 2013 and in January 2014. Anchovies were sampled in July 2013. The stomach contents were digested by sodium hypochlorite to isolate AP and then they were analysed by Raman spectroscopy and measured. AP were constituted of microplastics (MP) and cellulose fibres, sometimes associated with dyes. We found several plastic families: polyethylene (PE), polypropylene (PP), polystyrene, polyacrylonitrile, polyethylene terephthalate, polyamide and poly(butyl methacrylate). MP occurred in 35%, 50% and 40% of stomach contents of anchovies, sardines and herrings, respectively. Anchovies ingested bigger AP (2 mm) than the two other species. MP was in majority PE followed by PP. Our study shows that highly commercial species are exposed to MP. Further research is needed as MP are transport medium for organic pollutants and their fate once in the organism is unknown. [less ▲]

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See detailMicroparticules à base d’amidon radiomarquées au 188Re et 68Ga comme agent théranostique pour la radiothérapie interne sélective du carcinome hépatocellulaire
Verger, Elise ULg; Drion, Pierre ULg; MEFFRE, Geneviève ULg et al

in 2es Journées Francophones de Médecine Nucléaire (2016, May), 40(3), 182

Les microparticules SBMP, en étant capable d'être radiomarquées rapidement, de manière reproductible, sous forme de kits prêt-à-l‘emploi, par du 188Re et du 68Ga, se révèlent être un outil théranostique ... [more ▼]

Les microparticules SBMP, en étant capable d'être radiomarquées rapidement, de manière reproductible, sous forme de kits prêt-à-l‘emploi, par du 188Re et du 68Ga, se révèlent être un outil théranostique prometteur pour le traitement du carcinome hépatocellulaire. [less ▲]

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See detailMot de cloture
Mescoli, Elsa ULg; Sarcinelli, Alice ULg

Conference (2016, May)

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See detailAnalyse des effets des exigences d’accountability sur l’organisation du travail des intermédiaires de l’emploi : mise en perspective de tensions identitaires
Beuker, Laura ULg; Gérard, Julie ULg

Conference (2016, May)

Suite aux nombreux bouleversements économiques et sociaux qui ont touché les pays de l’Union européenne fin des années 1980, d’impérieux besoins de lisibilité et de modernisation des services publics de ... [more ▼]

Suite aux nombreux bouleversements économiques et sociaux qui ont touché les pays de l’Union européenne fin des années 1980, d’impérieux besoins de lisibilité et de modernisation des services publics de l’emploi sont apparus. Ceux-ci doivent dorénavant veiller à la mise en œuvre d’exigences a priori incompatibles telles qu’être efficaces, flexibles et respecter une enveloppe budgétaire, tout en œuvrant à l’inclusion sociale. La mise en œuvre de ces exigences s’inscrit dans la lignée du nouveau management public qui introduit les valeurs et les modes de fonctionnement de la firme privée au sein d’administrations publiques à caractère bureaucratique (Pesqueux, 2006 ; Bezes, 2012). Parmi les services publics de l’emploi belges, cette transformation de l’action publique s’apparente à une décentralisation partielle de leurs ressources et de leurs responsabilités auprès de partenaires privés. Ce nouveau mode d’organisation du travail prend la forme de partenariats publics-privés dont la visée est d’assurer conjointement la réinsertion socioprofessionnelle des demandeurs d’emploi (Aubert et Patry, 2004). Dans leurs activités, tant les services publics de l’emploi que les prestataires privés sont amenés à devoir rendre des comptes sur la réalisation de leurs pratiques. Cette exigence d’accountability comporte un double but : (1) être transparent ; (2) légitimer l’utilisation de l’argent public. Prenant appui sur les apports de la sociologie des groupes professionnels, nous analyserons l’influence des exigences d’accountability sur l’organisation du travail des intermédiaires. Pour ce faire, nous avons réalisé une recherche empirique de nature qualitative (N = 317 observations ; N = 40 entretiens semi-directifs) en Fédération Wallonie-Bruxelles auprès de deux prestataires de l’emploi : un public et un privé. Nous montrerons que le travail relationnel d’accompagnement réalisé par ces deux acteurs est résumé par des chiffres et de la saisie de données, rendant de la sorte invisible leur coeur de métier. Initialement engagés pour réaliser une mission foncièrement relationnelle (à savoir l’accompagnement des demandeurs d’emploi), ils sont désormais contraints par des procédures et mus par une logique d’efficacité. Ce hiatus, entre l’aspect relationnel de la fonction et les exigences d’efficacité concomitantes, se cristallise dans deux tensions identitaires, dont nous rendrons compte. [less ▲]

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See detailFrom Metabolomics to Identification of a new therapeutic approach for Age-Related Macular Degeneration (AMD)
Schoumacher, Matthieu ULg; De Tullio, Pascal ULg; LAMBERT, Vincent ULg et al

Poster (2016, May)

Age-related macular degeneration (AMD) is the leading cause of vision loss in the western world among people aged 50 or older. 90% of all vision loss due to AMD result from the exudative form, which is ... [more ▼]

Age-related macular degeneration (AMD) is the leading cause of vision loss in the western world among people aged 50 or older. 90% of all vision loss due to AMD result from the exudative form, which is characterized by choroidal neovascularization (CNV). Age-related changes that induce pathologic CNV are incompletely understood and critical issues remain to be addressed. Metabolomics is defined as the comprehensive study of endogenous metabolites changes in various biological systems. This newly emerging “omic” science provides a unique opportunity to correlate variation of the metabolome with pathological occurrence or progression and/or to identify metabolites that are implicated in the disease. We apply a 1H NMR metabolomics approach on sera collected from AMD patient and healthy volunteers and form a mice model of laser-induced CNV which mimics the effect of exudative AMD. After post-processing treatments, the different spectra were analyzed by statistical discriminant methodologies (PCA, ICA, PLS-DA, O-PLS-DA). These approaches allow the differentiation between control and AMD patients and between laser-induced mice and the control mice group. Moreover, the same discriminating spectral zones have been identified in human and mice model, leading to the emergence of different putative biomarkers. Among these markers, lactate emerges as a key metabolite in both settings. Mechanistically, lactate produced locally and by inflammatory cells, plays a critical role in the onset of the inflammatory and angiogenic phases. In mice model of laser-induced CNV, normalization of circulating lactate by dichloroacetate a pyruvate dehydrogenase kinase (PDK) inhibitor, decreases CNV development. Our data support the innovative concept of lactate as a parainflammation- and angio-metabolite associated to AMD and CNV progression. Moreover, control of blood lactate level via inhibition of PDK provides new options for the treatment of exudative AMD. This study demonstrates the ability of metabolomics for drug target discovery and opens new perspectives for AMD treatment and patient follow-up. [less ▲]

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See detailEnergy Reduction in Public Building Stock: Assessing the Impact of Control Strategy over Expected Energy Savings and Indoor Comfort Level
Ruiz Flores, Roberto ULg; D’Antoni, Matteo; Lemort, Vincent ULg

in CLIMA 2016 - proceedings of the 12th REHVA World Congress: volume 1. Aalborg: Aalborg University, Department of Civil Engineering. (2016, May)

In the framework of EU FP7 BRICKER project, the renovation of public owned nonresidential buildings is addressed through the installation of innovative passive and active technologies. The expected impact ... [more ▼]

In the framework of EU FP7 BRICKER project, the renovation of public owned nonresidential buildings is addressed through the installation of innovative passive and active technologies. The expected impact is a primary energy reduction of about 50% with respect to the existing scenario with a large replication potential under different European countries. In order to achieve such ambitious goal one issue that cannot be ignored is the effect of control strategy, not only over the resulting energy performance but also over the resulting indoor comfort conditions. In this paper, the actual control strategy implemented in the Belgian demo of Bricker project is introduced, compared against an ideal approach and accordingly optimized. The resulting proposed approach is then tested by means of numerical simulations over a base case scenario before renovation. The main conclusion of this work is the demonstration that control strategy of energy generation and distribution systems has to be revised whenever deep renovation of passive or active building technologies is undertaken. Contrarily to which, project renovation goals cannot be met. [less ▲]

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See detailEffect of Cooling and Shear Rates on Physicochemical Properties of Binary Fat Blends Based on Shea Stearin
Danthine, Sabine ULg; Delatte, Sophie; Smith, Kevin M. et al

Conference (2016, May)

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See detailComparison of 3 Diffractive IOLs in 3 Wavelengths Bifocal/ EDOF/Trifocal.
Gatinel, Damien; Pagnoulle, Christophe; Loicq, Jerôme ULg et al

Conference (2016, May)

Purpose To describe the optical performances of 3 types of diffractive hydrophobic intraocular lenses (IOLs): monofocal achromatic, bifocal and trifocal, using various visible wavelengths. Methods 3 IOLs ... [more ▼]

Purpose To describe the optical performances of 3 types of diffractive hydrophobic intraocular lenses (IOLs): monofocal achromatic, bifocal and trifocal, using various visible wavelengths. Methods 3 IOLs were measured with an optical bench (PMTF,LambdaX,Nivelles, Belgium) to determine modulation transfer function (MTF) and point spread function (PSF). Measurements were performed at 480 nm,546 nm,650 nm using an aberration free cornea and aspheric artificial cornea generating +0.28µm positive spherical aberration by ISO11979-2 guidelines. Through-focus MTF was recorded for various pupil apertures. Evaluation of halos was performed from PSF measurements obtained at each focal spot location. Images of USAF targets were recorded with simulated distances from 1m to 25cm. Amplitude of off-axis peaks of radial profile of PSF enabled to quantify percentage of energy within the halos. Results The monofocal and the bifocal IOLs presented 2 peaks on the through-focus MTF in green light: intermediate vision (at +1.75D) for the monofocal achromatic lens, and far and near vision (at +4D) for the bifocal IOL of the same material. Three peaks (Distance, Intermediate at +1.75D, Near at +3.5D) were recorded with the trifocal IOL at any wavelength. The achromatic monofocal IOL was monofocal for far vision with red light and monofocal for near vision with blue light. The influence of the cornea models was limited. The amount of halos were comparable between lenses (3 to 5 % of the enclosed central light energy). Conclusion The achromatic diffractive IOL behaved like a bifocal IOL with an intermediate addition foci in green light. The bifocal and trifocal IOL induced similar chromatic effects for the near (bifocal, trifocal) and intermediate (trifocal) foci. [less ▲]

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See detailThe Dark Side of Customer Participation: The Antecedents of Customer Participation Stress
Treger, Stephanie; Büttgen, Marion; Schumann, Jan Hendrik et al

Conference (2016, May)

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See detailQuand les cultures alimentaires se rencontrent. (Re)définition et transmission des pratiques dans un atelier de cuisine arabe en Italie.
Mescoli, Elsa ULg

Conference (2016, May)

Le déplacement des individus est toujours accompagné par le mouvement de choses et pratiques qui voyagent avec eux. Ce fait permet d’étudier la culture matérielle engagée par la mobilité des personnes ... [more ▼]

Le déplacement des individus est toujours accompagné par le mouvement de choses et pratiques qui voyagent avec eux. Ce fait permet d’étudier la culture matérielle engagée par la mobilité des personnes. Cette culture inclut les habitudes alimentaires, qui font l’objet de plusieurs recherches portées sur les changements culinaires (ou les résistances) déterminés par la migration. Loin d’être le seul enjeu constaté lorsque l'on étudie les pratiques alimentaires des migrants – qui par ailleurs sont souvent considérées comme statiques avant la migration –, cette question amène souvent à négliger d'autres dynamiques importantes qui sont également à l’œuvre. Telles que celles qui se produisent lorsque des cultures alimentaires qui se prétendent différentes se rencontrent, ce qui conduit à la mobilisation d’appartenances par les membres de différents groupes culturels qui veulent prendre une position spécifique chacun par rapport à l'autre. Mon exposé vise à analyser cette rencontre. L'hypothèse est qu’elle façonne un espace qui correspond à un tertium quid, une dimension où les frontières des cultures alimentaires peuvent également s’atténuer en raison notamment de la (re)définition et de la transmission des pratiques. Afin de décrire ces dynamiques, je présenterai les données ethnographiques collectées durant un terrain ethnographique porté sur les pratiques culinaires d'un groupe de femmes migrantes marocaines vivant dans la périphérie de Milan, en Italie. Je vais également appuyer ma présentation sur des matériaux visuels recueillis lors des observations et des entretiens dans les maisons ainsi que dans des événements publics tel qu’un cours de cuisine arabe. [less ▲]

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See detailInteraction entre la zone endommagée autour d’un tunnel et son soutènement – Simulation numérique
Charlier, Robert ULg; Sillen, Xavier; Li, Xiangling et al

Conference (2016, May)

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See detailAre crop models able to efficiently simulate crop growth under shade?
Artru, Sidonie ULg; Dumont, Benjamin ULg; Lassois, Ludivine ULg et al

in Gosme, Marie (Ed.) 3rd European Agroforestry conference 2016 - Book of abstracts (2016, May)

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See detailDétection de la mémoire ischémique myocardique par le 99mTc-fucoïdane : validation pré-clinique.
Mikail, N; Louedec, L; Aid, R et al

Conference (2016, May)

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See detailFrom Metabolomics Study of Age-Related Macular Degeneration (AMD) to the Development of New Pyruvate Dehydrogenase Kinase Inhibitors (PDK)
Arslan, Deniz ULg; Schoumacher, Matthieu ULg; Pirotte, Bernard ULg et al

Poster (2016, May)

Age-related macular degeneration (AMD) is a leading cause of blindness in the elderly population of industrialized countries. This blindness results from the deterioration of the macula, a small part of ... [more ▼]

Age-related macular degeneration (AMD) is a leading cause of blindness in the elderly population of industrialized countries. This blindness results from the deterioration of the macula, a small part of the retina specialized for the high-acuity vision. Exudative AMD, called “wet”, is characterized by the formation of new blood vessels growing under the retina according to a process named choroidal neovascularization (CNV). Currently, the aetiology and pathogenesis of AMD remain unclear. Nevertheless, a recent metabolomics study performed on the serum of “wet” AMD patients and on a CNV murine model, that mimics the effect of “wet” AMD, have demonstrated that lactate level is clearly involved in the severity of the pathology as well as the relationship between lactate, CNV and AMD. According to this result, we suggest a new therapeutic approach of AMD based on the normalization of blood lactate level. The modulation of the lactate plasma concentration by treatment of the animals with synthetic compounds and more specifically Pyruvate Dehydrogenase Kinase (PDK) inhibitors significantly decrease the CNV. PDK and its four isoforms (PDK1-4) regulate the activity of the pyruvate dehydrogenase complex (PDH), a mitochondrial enzyme that plays a major role in the metabolic pathway of glucose, by reversible phosphorylation. Starting from these results, development of new PDK inhibitors could open the way to innovative treatment opportunities in AMD disease. Different analogues of (R)-3,3,3-trifluoro-2-hydroxy-2-methylpropanamide (fig.1) have been already synthetized and pharmacological evaluation is currently in progress. According to the results obtained, various pharmacomodulations will be investigated [less ▲]

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See detailThat’s embarrassing! Effects of Brand Anthropomorphism on Intimate Disclosure
Gretry, Anaïs ULg; Horváth, Csilla; Belei, Nina

Conference (2016, May)

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See detailEn quoi l'ajout d'un élément de gamification (badges) impacte la réalisation des tests d'entraînement ?
Marique, Pierre-Xavier ULg; Van de Poël, Jean-François ULg; Hoebeke, Maryse ULg

Conference (2016, May)

Le département de physique de l’Université de Liège a développé un outil de soutien à l’apprentissage pour le cours de physique à destination des étudiants inscrits en première année de médecine. Le choix ... [more ▼]

Le département de physique de l’Université de Liège a développé un outil de soutien à l’apprentissage pour le cours de physique à destination des étudiants inscrits en première année de médecine. Le choix s’est porté sur une plateforme en ligne afin qu’elle soit accessible à chaque instant et de n’importe quel endroit, moyennant une connexion internet. L’étudiant, interrogé sous forme de questions à choix multiples, peut notamment utiliser un simulateur d’examens. Il peut à tout moment générer un test selon trois paramètres : la ou les matières qu’il souhaite travailler, le temps qu’il désire y consacrer et le niveau de maitrise qu’il souhaite atteindre. Dès lors, un test d’entrainement est généré automatiquement selon les critères choisis. L’étudiant peut visualiser son état d’avancement dans la matière grâce à une série de badges qu’il est invité à collecter. Une fois certains badges acquis, l’apprenant a la possibilité de télécharger un « pass » personnel lui donnant accès à une séance de simulation d’examen organisée en amphithéâtre. Cette étude présentera les premiers résultats de cette expérimentation. La corrélation avec les notes obtenues à l’examen ainsi que l’impact de la mise en place des badges dans le dispositif d’un point de vue motivationnel seront étudiés. [less ▲]

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See detailDélinquance et désistance : quelle méthodologie de recherche ?
Puglia, Rosa ULg; Glowacz, Fabienne ULg

Conference (2016, May)

Dans la littérature concernant la délinquance, les auteurs se sont, au départ, principalement intéressés aux raisons qui poussent les individus à commettre des délits mais peu ont tenté de comprendre ... [more ▼]

Dans la littérature concernant la délinquance, les auteurs se sont, au départ, principalement intéressés aux raisons qui poussent les individus à commettre des délits mais peu ont tenté de comprendre pourquoi et comment certains individus, qui ont commis des actes délictueux, sortent de la délinquance. En effet, la désistance, c’est-à-dire le processus de sortie de la délinquance, a longtemps été négligée par les chercheurs. À partir des années '50, un intérêt croissant pour ce domaine de recherche apparaît. La désistance devient alors un sujet d’étude indépendant et non plus un appendice de la recherche sur les carrières délinquantes (Mohammed, 2012). Malgré l’intérêt croissant pour ce champ de recherche, de nombreuses zones d’ombre persistent. Sur base d’une recherche longitudinale réalisée sur une population d’adultes en émergence délinquants (17-25ans), nous tentons d’avoir une approche holistique de la désistance. Celle-ci est définie ici comme un processus impliquant des changements individuels et sociaux, qui s’inscrit dans le temps et qui peut être marqué par des réitérations d’actes délinquants. Dans notre étude, la désistance sera étudiée à travers une approche mixte combinant un récit de vie et des questionnaires. L’approche narrative est essentielle dans notre recherche, elle permettra d’appréhender les transformations identitaires, les schémas de changement et de stabilité dans le parcours de vie et dans la trajectoire délinquante. Elle permettra également de mettre en avant les facteurs internes et externes identifiés comme des facteurs de désistance. Par ailleurs, comme Maruna (2001), nous posons l’hypothèse que les persistants et les désistants sont des individus similaires qui se trouvent à des stades différents du processus de changement. C’est pourquoi, en toile de fond, la désistance sera envisagée à travers le modèle transthéorique de Proshaska et DiClemente (1982) où différentes étapes se succèdent avant l’arrêt du comportement problématique. [less ▲]

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See detailHow Service Managers Can Shape Frontline Employees' Organizational Values to Reduce Person-Role Conflicts
Selzer, Veronika Luisa; Schumann, Jan Hendrik; Büttgen, Marion et al

Conference (2016, May)

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See detailTowards an Novel Stiff String Model for the Torque and Drag Problem
Huynen, Alexandre ULg

Conference (2016, May)

The petroleum industry relies on several kilometer long drillstrings to transmit the axial force and torque necessary to drill the rock formations and reach deep hydrocarbon reservoirs. The assessment of ... [more ▼]

The petroleum industry relies on several kilometer long drillstrings to transmit the axial force and torque necessary to drill the rock formations and reach deep hydrocarbon reservoirs. The assessment of the energy loss along the drillstring, known as the torque and drag problem, plays an essential role in well planning and drilling as the friction appearing at the contacts between the drillstring and the borehole may dramatically increase the costs or, even, be a limiting factor in some configurations. The identification of the number of contacts as well as their positions and extents constitutes the central concern of this question. The nonlinearities associated with the large deflection of the drillstring and the non-penetration condition as well as the a priori unknown number of contacts, however, make the use of conventional numerical tools rather inefficient. To circumvent these difficulties, a simplified stiff string model is derived. Partitioning the global problem in segments of drillstring either in continuous contact with the borehole or free of contact between their extremities, the originality of the proposed formulation lies in the descripion of the drillstring deflection as perturbation of the well-path. [less ▲]

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See detailANALYTICAL PREDICTION OF THE BEARING RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
Armenante, Vittorio; D'Antimo, Marina ULg; Demonceau, Jean-François ULg et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research ... [more ▼]

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research is motivated by the fact that the rules currently provided by EC3 for defining the bearing resistance of steel connections are limited to the case of stacks of plates, where every plate composing the connection is always restrained out of plane by the adjoining plate or by the bolt head or nut. This is a condition not verified in case of connections realized with long bolts fastening hollow sections. The work is organized in two sections. First, the results of an experimental campaign are presented and successively, the results of a parametric analysis carried out by means of a Finite Element model calibrated on the experimental data are reported. Afterwards, an analytical approach able to include the local buckling effects arising in these kinds of connections is presented, proposing a coefficient for the reduction of the resistance, to be included in the EC3 formulation. [less ▲]

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See detailJeunes fugueurs en Belgique : Indicateurs de risque et de protection dans les signalements
Courtain, Audrey ULg; Glowacz, Fabienne ULg

Conference (2016, May)

Chaque année, 1% des foyers européens vit la fugue d’un de ses membres de moins de 18 ans. Au 2 janvier 2014, plus de onze mille jeunes français étaient recherchés comme fugueurs ; avec près de 50.000 ... [more ▼]

Chaque année, 1% des foyers européens vit la fugue d’un de ses membres de moins de 18 ans. Au 2 janvier 2014, plus de onze mille jeunes français étaient recherchés comme fugueurs ; avec près de 50.000 fugues de mineurs français par an. En Belgique, sur les années 2013-2014, l’organisme Child Focus s’est vu confier près de 1700 dossiers de fugues de mineurs. Child Focus - Fondation pour Enfants Disparus et Sexuellement Exploités – a été créée à la suite de l’affaire Dutroux, et traite des dossiers de disparitions de mineurs (enlèvements par un tiers, enlèvements parentaux, fugues) et d’exploitation sexuelle de mineurs. Généralement contacté par la famille du jeune ou par la police, Child Focus ne peut ouvrir un dossier de fugue qu’à la suite d’un procès-verbal. Les dossiers de fugues de mineurs ouverts auprès de Child Focus constitueraient un cinquième des fugues enregistrées par la police belge. Ces dossiers, de par leur contenu, permettent d’envisager trois axes de recherche. Le premier axe porte sur le profil des jeunes signalés en fugue (âge, sexe, contexte familial, scolarité,…). Le second axe porte sur le profil du signalant (père, mère, famille élargie, police,…). Le troisième axe porte sur les indicateurs de risque et de protection que les signalants expriment auprès de Child Focus lorsqu’ils évoquent le jeune en fugue (consommation de drogue, délinquance, santé mentale,…). Ces trois axes sont étudiés à partir de deux recherches empiriques, la première portant sur les 1700 dossiers des années 2013-2014, et la seconde portant sur 200 de ces dossiers, dont nous donnerons les résultats préliminaires. Enfin, par ces recherches, nous proposons d’évaluer la portée des filtres et de la black box permettant de comprendre comment et pourquoi certains cas de fugue sont davantage susceptibles d’être confiés à Child Focus que d’autres. [less ▲]

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See detailBinary Phase Behavior of tripalmitoylglycerol and 1,3-dipalmitoyl-2-stearoyl-sn-glycerol
Bhaggan, K.; Smith, K. W.; Blecker, Christophe ULg et al

Poster (2016, May)

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See detailPRODUCTION OF BIOFUELS AND BIOBASED COMPOUNDS IN URBAN BIOREFINERIES: A STRATEGY TO MANAGE WASTE IN WALLONIA?
Richel, Aurore ULg; Haubruge, Eric ULg; Jacquet, Nicolas ULg

Conference (2016, May)

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for ... [more ▼]

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for the production of an array of biofuels and bioproducts. This “urban biorefining” concept fits particularly with the economic, geographic and politic contexts and constraints of the Walloon Region (south part of Belgium). Indeed, Walloon Region is a very small territory (area of about 6,504 sq mi) with a temperate climate. Supply feedstock, mainly arising form forestry and agriculture, are thus rather restricted, submitted to importation, and subjected to non-standardized quality. Several examples of our regional strategy, still available on an industrial scale, are herein proposed and detailed. [less ▲]

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See detailL’accompagnement des demandeurs d’emploi par les intermédiaires du marché du travail : une triple opération de sélection
Gérard, Julie ULg; Beuker, Laura ULg

Conference (2016, May)

En 1997, la Convention 181 de l’Organisation internationale du travail sonne le glas du monopole public en matière de placement. Elle invite les services publics de l’emploi et les opérateurs privés à ... [more ▼]

En 1997, la Convention 181 de l’Organisation internationale du travail sonne le glas du monopole public en matière de placement. Elle invite les services publics de l’emploi et les opérateurs privés à collaborer pour fournir un accompagnement plus efficace aux demandeurs d’emploi. Cette collaboration s’inscrit dans le cadre d’une entente contractuelle où les services de l’emploi confient l’exploitation et la gestion de certaines de leurs activités à des prestataires privés au sein de partenariats publicsprivés. Qu’il s’agisse des services publics de l’emploi ou des prestataires privés, tous deux ont pour mission d’assurer l’insertion socioprofessionnelle des demandeurs d’emploi en tant que généralistes, ou spécialistes de l’employabilité. Elle s’inscrit dans la stratégie d’EU2020 et contribue à l’atteinte d’un taux d’emploi de 73,2% pour 2020. À l’aide de trois études de cas réalisées auprès du service public wallon et de deux prestataires privés exerçant en Région wallonne, nous démontrerons que cette mission d’accompagnement s’exerce au prix d’une triple sélection : une première réalisée par le politique, via la définition de publics cibles prioritaires ; une seconde opérée par les agents du service public dans leurs pratiques professionnelles d’accompagnement ; une troisième effectuée par les prestataires privés en fonction de critères objectifs et/ou subjectifs. Pour étudier la mise en oeuvre et l’effet de ces opérations de tri, nous nous inscrirons dans une approche pragmatique. Appuyé sur une étude empirique constituée d’entretiens semi-directifs (N = 45), d’observations d’interactions (N = 149) et de discussions informelles, nous montrerons les conséquences globales de ces tris pour les demandeurs d’emploi. En ne sélectionnant que les plus employables des inemployables, l’opération d’accompagnement ne serait-elle finalement qu’une agitation, et non pas une véritable mise à l’emploi ? [less ▲]

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See detailElectromagnetic Investigation of the Pb-Zn deposit of Lontzen, Belgium
Evrard, Maxime ULg; Pirard, Eric ULg; Nguyen, Frédéric ULg

in First International Conference: MINING IN EUROPE, ABTSRACT volume (2016, May)

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See detailChitosan-based nanofibers mats for tissue engineering
Aqil, Abdelhafid ULg; Croisier, Florence ULg; Colige, Alain ULg et al

Conference (2016, May)

Polymer hydrogels resemble the natural living tissue due to their high water content and soft consistency. They find many applications in the design and production of contact and intraocular lenses ... [more ▼]

Polymer hydrogels resemble the natural living tissue due to their high water content and soft consistency. They find many applications in the design and production of contact and intraocular lenses, biosensors membranes, matrices for repairing and regenerating a wide diversity of tissues and organs. Polysaccharides such as chitosan and hyaluronic acid based hydrogels have shown a great potential for biomedical and pharmaceutical applications, on account of their remarkable compatibility with physiological medium. Besides, it is degraded in a physiological environment into non-toxic products, which make them outstanding candidates for short- to medium-term applications, especially for tissue engineering. In this respect, the preparation of nanometric fibers mats based on this polysaccharide are highly interesting as such structure mimics the one of skin extracellular matrix. Such nanofibrous materials can be prepared by electrospinning (Figure 1). This technique uses a high voltage to create an electrically charged jet of polymer solution to obtain polymer fibers ranging from nanometers to a few microns in diameter. We thus have investigated strategies allowing to generate chitosan based nanofiber mats exhibiting a mechanical resistance strong enough to be easily handled while keeping the peculiar features of chitosan hydrogels favoring the interaction with cells and soft tissues to provide efficient tissue reconstruction. In a first strategy, polysaccharide-based nanofibers with a multilayered structure were prepared by combining electrospinning (ESP) and layer-by-layer (LBL) deposition techniques. Elastic nanofibers bearing charges at their surface were firstly prepared by electrospinning poly(ε-caprolactone) (PCL) with a polyelectrolyte precursor. After activation by adjusting the pH, the layer-by-layer deposition of chitosan and hyaluronic acid, can be used to coat the electrospun fibers. A multilayered structure is then achieved by alternating the deposition of the positively charged chitosan with the deposition of a negatively charged polyelectrolyte. These novel polysaccharide-coated PCL fiber mats remarkably combine the mechanical resistance typical of the core material (PCL) – particularly in the hydrated state –, with the surface properties of chitosan. Besides, crosslinked nanofibrous mats of chitosan and polyethylene oxide blends, were successfully prepared via electrospinning technique followed by heat mediated chemical crosslinking. This chemical cross-linking allows adjusting the mechanical resistance of the mats while preserving their biocompatibility. In both cases, the control of the nanofiber structure offered by the electrospinning technology, makes the developed processes very promising to precisely design biomaterials for tissue engineering. Preliminary cell culture tests corroborate the potential use of such systems in wound healing applications. [less ▲]

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See detailElucidating diversity of thin filamentous mat-forming Antarctic cyanobacteria
Lara, Yannick ULg; Durieu, Benoit ULg; Deblander, Victor ULg et al

Poster (2016, April 29)

Freshwater ecosystems range from glacial cryoecosystems, ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the biomass. In ... [more ▼]

Freshwater ecosystems range from glacial cryoecosystems, ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the biomass. In these mats, cyanobacteria form matrices that shelter other organisms, and carry out the primary production. Narrow filamentous cyanobacteria belonging to the genera Leptolyngbya and Phormidium are especially abundant in Antarctic microbial mats and are essential for the formation of matrix. However, the lack of morphological criteria and the small cell size of cyanobacteria belonging to these two genera make their identification problematic. Indeed, they are known as polyphyletic taxa according to botanical and bacteriological criteria. The characterization of strains is the first step for an assessment of the real diversity and for understanding their role in the environment. We designed a polyphasic approach that combines molecular analyses, environmental physiology experiments and microscopic observations. Briefly, we amplified and sequenced three loci (16S rRNA, ITS, and rpoC1) for 31 strains of Leptolyngbya and Phormidium. We performed whole genome sequencing for five strains. Cultures at different stage were observed by light and epifluorescence microscopy. Finally, selected strains were grown in nitrogen-limited. The Leptolyngbya and Phormidium strains were distributed into four lineages. Phylogenetic trees supported the distribution of P. priestleyi strains into at least two potentially new lineages, and L. antarctica strains were separated into one endemic and one cosmopolitan lineage. This was supported by the microscopic observations of 1-year old cultures. Genome analyses revealed the presence of sequences related to the production of secondary metabolites in strains from two of the studied lineages. Secondary metabolites are often known for their antimicrobial activities. Such properties would partly explain how cyanobacterial mats survive to predation and degradation by other bacteria. This work provides the first building block to the understanding of survival strategies developed by mat-forming cyanobacteria and how they succeeded as the most abundant phototrophs on the Antarctic continent. This work was realized in the frame of the BelSPo project CCAMBIO. [less ▲]

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See detailThe CCAMBIO project to characterize the biodiversity and distribution of microorganisms in microbial mats of Antarctic lakes
Durieu, Benoit ULg; Lara, Yannick ULg; Obbels, Dagmar et al

Poster (2016, April 29)

The BelSPO project CCAMBIO aims to study the biogeographical distribution of microorganisms in lacustrine microbial mats using a combination of techniques including microscopical observations (light and ... [more ▼]

The BelSPO project CCAMBIO aims to study the biogeographical distribution of microorganisms in lacustrine microbial mats using a combination of techniques including microscopical observations (light and electronic microscopy), strain isolation, and molecular diversity assessment using Next Generation Sequencing. The samples were collected in different Antarctic and sub-Antarctic biogeographical regions. A detailed microscopic study of the Antarctic diatom diversity allowed to revise a number of taxa and discover new ones. A multivariate analysis of diatoms showed that these regions hosted different diatom flora. Endemic diatom taxa were also observed, and a multigene molecular phylogeny of Pinnularia borealis showed a high genetic diversity. Pilot studies were conducted for the microeukaryotes and cyanobacteria to select NGS protocols and bioinformatic pipelines. Preliminary multivariate analysis of over 100 samples revealed that distinct biogeographic zones could be recognized in both the prokaryote and eukaryote data, which is in agreement with the classical subdivision of the Antarctic Realm into Maritime Antarctica, Continental Antarctica and the Sub-Antarctic Islands generally observed in plants and animals. Moreover, Sub-Antarctic assemblages harboured more complex foodwebs, with quite diverse metazoan groups. Lakes on the continent, however, were characterised by fewer metazoan groups and a greater importance of microbial herbivores and secondary consumers, including a relative high diversity of ciliates and tardigrades. Variation partitioning analysis revealed that spatial variables that approximated large-scale regional contrasts in historical (e.g. deglaciation history, geological origin) and climatic factors (e.g. mean annual air temperature) significantly explained the largest portion of the observed variation in community structure for eukaryotes, while in the prokaryote data environmental gradients related to conductivity were more important. In a first analysis of microbial mats from five Antarctic lakes and an aquatic biofilm from the Sub-Antarctic, the majority of the cyanobacterial OTUs retrieved were related to filamentous taxa such as Leptolyngbya and Phormidium, which are common genera in Antarctic lacustrine microbial mats. However, other phylotypes related to different taxa such as Geitlerinema, Pseudanabaena, Synechococcus, Chamaesiphon, Calothrix and Coleodesmium were also found. Results revealed a higher diversity than what had been reported using traditional methods based on microscopic observations and cultivation and also highlighted remarkable differences between the cyanobacterial communities of the studied lakes. In the next months, the molecular diversity data will be deposited into the “Microbial Antarctic Resource System (MARS)” presently developed into the webportal ‘biodiversity.aq’. The better knowledge of the diversity and distribution of microorganisms will contribute to a better assessment of their resilience and local/regional responses to global change. [less ▲]

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See detailUse of stable isotope ratios to delineate coastal benthic food web structure in Adélie Land (East Antarctica)
Michel, Loïc ULg; Dubois, Philippe; Eleaume, Marc et al

Poster (2016, April 29)

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice ... [more ▼]

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice cover decrease, in some parts of East Antarctica sea ice cover tends to increase, possibly in relation with changes in atmospheric circulation. Changes in sea ice cover are likely to influence benthic food web structure through modifications of benthic-pelagic coupling, disruption of benthic production and/or modifications of benthic community structure (i.e. resource availability for benthic consumers). Here, we studied shallow (0-20 m) benthic food web structure on the coasts of Petrels Island (Adélie Land, East Antarctica) during an event of unusually high spatial and temporal (two successive austral summers without seasonal break-up) sea ice cover. Using stable isotope ratios of C, N and S, we examined importance of several organic matter sources (benthic macroalgae, benthic biofilm, sympagic algae, suspended particulate organic matter and penguin guano) for nutrition of over 20 taxa of benthic invertebrates (sponges, sea anemones, nemerteans, sessile and mobile polychaetes, gastropods, bivalves, sipunculids, pycnogonids, amphipods, sea stars, sea urchins and sea cucumbers) spanning most present functional guilds. Our results provide insights about how Antarctic benthic consumers, which have evolved in an extremely stable environment, might adapt their feeding habits in response to sudden changes in environmental conditions and trophic resource availability. [less ▲]

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See detailPhysical activity: an unknown concept
Cloes, Marc ULg

Conference (2016, April 29)

Physical educators do not have necesseraly good representations about physical activity and sedentariness. During the presentation, participants will be involved in an interactive process aiming to ... [more ▼]

Physical educators do not have necesseraly good representations about physical activity and sedentariness. During the presentation, participants will be involved in an interactive process aiming to underline the main concepts that they should use in order to become effective agents of physical activity promotion. [less ▲]

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Peer Reviewed
See detailLa critique génétique dans la collection "Poétique"
Lorent, Fanny ULg

Conference (2016, April 29)

La critique génétique est, comme le dit bien Jean-Louis Jeannelle, une « théorie en quête d’elle-même » , tiraillée entre la tradition philologique et les avancées structuralistes. Elle doit sans cesse, à ... [more ▼]

La critique génétique est, comme le dit bien Jean-Louis Jeannelle, une « théorie en quête d’elle-même » , tiraillée entre la tradition philologique et les avancées structuralistes. Elle doit sans cesse, à la fois, se défaire des suspicions positivistes qui pèsent sur elle et justifier son appartenance possible à la (une ?) poétique . Nous voudrions étudier, dans cette communication, les mécanismes de légitimation de cette discipline aux contours épistémologiques complexes au sein même de la collection « Poétique », qui accueillit, en 1998, Les brouillons de soi de Philippe Lejeune et, en 2011, Logiques du brouillon de Daniel Ferrer. Comment les auteurs vont-ils, dans leur ouvrage, justifier leur parution au sein d’une collection dont les présupposés théoriques semblent, a priori, contraires à ceux présidant à leur travail ? Quelles en sont alors les implications méthodologiques, pour chacune des deux disciplines ? [less ▲]

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See detailLe droit du travail (re)visité par la Cour constitutionnelle
Kéfer, Fabienne ULg

in Boufflette, Sophie (Ed.) La cour constitutionnelle. De l'art de modeler de droit pour préserver l'égalité (2016, April 29)

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de ... [more ▼]

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de redessiner – les contours de cette branche du droit fortement marquée par son histoire. Elle se penche sur un peu plus de trente arrêts prononcés par la Cour constitutionnelle, principalement depuis 2008, dans les domaines suivants : le travail à temps partiel (chapitre 1), le droit de la non-discrimination (chapitre 2), certaines questions intéressant le licenciement, à savoir la durée du préavis, les mesures destinées à stimuler l’employabilité, la motivation, la notion de rémunération en cours en cas de réduction temporaire des prestations de travail, et l’indemnité d’éviction du représentant de commerce (chapitres 3 à 7), les distinctions entre employés et ouvriers autres que les conditions de licenciement (chapitre 8), la procédure de réorganisation judiciaire (chapitre 9) et la prescription (chapitre 10). [less ▲]

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See detailPercevoir et reconnaître des symboles. La théorie de la représentation iconique de Dominic Lopes.
Hagelstein, Maud ULg

Conference (2016, April 28)

Perceiving and recognizing symbols. Dominic Lopes’ theory of iconic representation. In his works on the epistemological value of images (Understanding Pictures - 1996), Dominic Lopes (Department of ... [more ▼]

Perceiving and recognizing symbols. Dominic Lopes’ theory of iconic representation. In his works on the epistemological value of images (Understanding Pictures - 1996), Dominic Lopes (Department of Philosophy - University of British Columbia) develops an analytical aesthetics primarily concerned with iconic representation. His analysis distinguishes two models of iconic representation comprehension. In the first model, inspired by perceptual approaches like that of Richard Wollheim, the process of image recognition is rooted in perception (to sum it up: perceptualism embraces the idea of « likeness » between the image and what it represents). One of this model’s shortcomings, however, is that it too readily assumes that perception can be a natural, straightforward process. Indeed, iconic representation can not be understood through perception alone, as vision is of course influenced by cultural and, most of all, cognitive processes. A representative model thus needs to account for the ways in which iconic recognition differs from ordinary visual recognition. In the second model, which build off of symbolic approaches like that of Nelson Goodman, iconic representation works the same way as other types of symbols, particularly linguistic ones. Thus, this approach considers the similarities between images and language (representations which are both affected by processes of denotation and predication). However, we all know how strongly image theoreticians have been resisting the linguistic paradigm (iconic turn topic): some worry about overlooking the image’s semantic density in favor of its « simple » descriptive quality. Lopes finds a path between these two models by developing a « theory of aspect recognition », which incorporates perceptive elements into a symbolic structure. According to Lopes, if we agree that images belong to symbolic systems of denotation, then « they might be symbols for which the reference is dependent on the carrying out of perceptive aptitudes », a claim which my talk will explore. I will also discuss how Lopes’ theory accounts for skills acquisition (the capacity to recognize) through images, and shows how images help these skills progressively develop. [less ▲]

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See detailModelling of long-term deep renovation strategies for the Belgian building stock
Ruellan, Guirec ULg

Poster (2016, April 28)

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high ... [more ▼]

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high performance of new constructions represented in the nearly zero energy buildings target is not sufficient to ensure the efficiency of the overall building sector. Therefore, it is crucial to put in place a progressive renovation policy. Despite the different renovation strategies and projects that took place in the recent year in Belgium, the overall renovation rate remains almost stable for the last ten years. This study focuses on the renovation market in Belgium and analyzes the factors that influence the evolution of the renovation rate. The objective is the identification and development of effective strategies bypass that leads to increased renovation rates in Belgium. The research methodology is based on an iterative process, based on a systematic literature review of Flemish and Walloon projects, publications and policy. These first work package will allow to identify factors influencing the renovation rate and in other hand to build a model of the existing building stock. Impacts of the influencing factors on the building stock are simulated in the fourth work package in order to propose an action plan in the last part. Three mains outcomes are expected: A model of the existing building stock in Belgium and its retrofit potential, a simulation of the effects of different strategies used to increase the renovation rate in Belgium and a theoretical action plan on strategies to increase the rate of renovation in Belgium. These results are necessary to inform and support the decision making of policy makers, municipalities and operational planning authorities across Belgium. [less ▲]

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