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See detailA 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation
Agosta, Cécile ULg; Favier, Vincent; Genthon, Christophe et al

Poster (2012, July)

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See detailUn art joyeux? Représentation spectaculaire et critique politique dans 'Der Kandidat' d'Alexander Kluge
Hamers, Jérémy ULg

in Ad hoc (2012), 1

En associant un ensemble de représentations hétérogènes (images d’Epinal, photographies, films et vidéos), et en déclenchant de la sorte une véritable cascade de rappels visuels et sonores, le cinéma ... [more ▼]

En associant un ensemble de représentations hétérogènes (images d’Epinal, photographies, films et vidéos), et en déclenchant de la sorte une véritable cascade de rappels visuels et sonores, le cinéma analytique d’Alexander Kluge doit faire accéder le spectateur à une perception supérieure qui le rendra conscient des multiples associations d’images que le réel et ses représentations convoquent et suscitent à chaque instant. Notre texte questionne ce principe au contact de quelques films du réalisateur dans lesquels diverses manipulations sonores notamment privent un ensemble d’instants/représentations historiques de leur nature spectaculaire, c’est-à-dire de ce pouvoir de susciter une impression de solennité chez le spectateur. [less ▲]

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See detailAnálise tensiva das relações imagem/legenda na astrofísica
Sturnack, Lionel ULg

in CASA : Cadernos de Semiótica Aplicada (2012), 10(1),

A descrição semiótica que proporemos, neste trabalho, incide sobre três tipos de textos de legenda que pertencem ao discurso científico lato sensu da área astrofísica. O propósito é analisá-las com as ... [more ▼]

A descrição semiótica que proporemos, neste trabalho, incide sobre três tipos de textos de legenda que pertencem ao discurso científico lato sensu da área astrofísica. O propósito é analisá-las com as ferramentas propostas pela semiótica tensiva, desenvolvida por Claude Zilberberg e Jacques Fontanille, a fim de estabelecer os critérios tensivos sobre os quais poderíamos efetuar uma diferenciação genérica entre estes discursos. [less ▲]

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See detailFormations initiales dans le champ de l’accueil de l'enfance (0 – 12 ans)
César, Angèle ULg; Dethier, Anne; Francois, Nathalie ULg et al

Report (2012)

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See detailEating disorders throughout female adolescence.
Domine, F.; Dadoumont, C.; BOURGUIGNON, Jean-Pierre ULg

in Endocrine Development (2012), 22

Eating disorders (EDs) are conditions which are becoming more and more widespread among adolescents and they often lead them to seek the opinion of a professional health caregiver, including gynecologists ... [more ▼]

Eating disorders (EDs) are conditions which are becoming more and more widespread among adolescents and they often lead them to seek the opinion of a professional health caregiver, including gynecologists and pediatricians. EDs, and particularly anorexia nervosa (AN), are usually classified as psychological or psychiatric disorders, but they may have major somatic implications and complications as osteoporosis, nutritional deficiencies, cerebral atrophy, cardiac and metabolic disorders. A key issue in the management is prevention or reduction of both the serious somatic consequences and the important mental health consequences (e.g. depression, psychosocial withdrawal, phobia and suicide), integrating different perspectives (psychological or psychiatric - individual and familial -, genetic, nutritional, pediatric, gynecological). Adolescence is a critical period for the onset of EDs though they may also involve younger children. In this case, the consequences on the development (height, weight, puberty) can also be significant. In this review, we will focus on eating disorders in adolescent girls with an emphasis on AN. We describe variations in ED characteristics and their management depending on age at occurrence. A possible ED should be considered by pediatricians consulted about delayed female growth and puberty as well as gynecologists in patients with primary or secondary amenorrhea or infertility. [less ▲]

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See detailInfluence of the addition of functionalized MWCNT on mechanical properties on epoxy/carbon fiber and epoxy/carbon-aramid fiber composites
Fernandez, Carolina; Flores, Paulo; Montrieux, Henri-Michel ULg et al

in Proceedings of the 1st Brazilian Conference on Composite Materials (2012, July)

We investigated the effect of the inclusion of carbon nanotubes (CNT) on the mechanical properties and wear behavior of epoxy/carbon and epoxy/carbon-aramid composites in this study. Epoxy/carbon and ... [more ▼]

We investigated the effect of the inclusion of carbon nanotubes (CNT) on the mechanical properties and wear behavior of epoxy/carbon and epoxy/carbon-aramid composites in this study. Epoxy/carbon and epoxy/carbon-aramid composites with 0 wt.% CNT and 0.3 wt.% CNT were manufactured by RTM, amino functionalized multi-walled CNT (MWCNT) were used to modify the matrix. Tensile, compression, two rail shear, Charpy impact tests and Pin On Disc (POD) were performed on the four composites. The EP/CAF composites showed better impact resistance than the ones containing carbon woven. The addition of CNTs improves the shear modulus in 5% for EP/CF composites and 6% for EP/CAF. The results also show that the dynamic friction coefficient is independent of the CNT content, and the specific wear rate shows no improvement with the selected test parameters. [less ▲]

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See detailHistological assessment of gonad maturation in Labeo parvus (Teleostei: Cyprinidae) in Benin
Montchowui, Elie; Compère, Philippe ULg; Thiry, Marc ULg et al

in African Journal of Aquatic Science (2012), 37(2), 155-163

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See detailA Schur Complement Method for DAE Systems in Power System Simulations
Aristidou, Petros ULg; Fabozzi, Davide ULg; Van Cutsem, Thierry ULg

Scientific conference (2012, June 28)

The power system networks in North America and Europe are the largest man-made interconnected systems in the world. Many power system applications rely on time consuming dynamic simulations of large-scale ... [more ▼]

The power system networks in North America and Europe are the largest man-made interconnected systems in the world. Many power system applications rely on time consuming dynamic simulations of large-scale power systems in order to optimize the operation and ensure the reliability of the electricity network. Dynamic simulations of power systems involve the solution of a series of initial value, stiff, hybrid DAE systems over a time window. To achieve this, the time window is discretized and a new DAE system is formed and solved at each time step, with initial values taken from the previous time step solution. At each new time step, the DAE system to be solved can be different because of the discrete variables involved in the formulation (e.g. a differential equation can become algebraic and vice versa). A non-overlapping domain decomposition is proposed to speed up the solution of the DAE system using the Schur Complement Method. The special structure of the physical system helps define the domain partitioning scheme and eliminates the need for a partitioning algorithm. It allows the formulation and solution of the reduced system using sparse, direct solvers to obtain the interface variables. Afterward, the parallel evaluation of the internal subdomain variables is possible and efficient load balancing is achieved. Numerically, the method shows no convergence degradation when compared to the integrated method, which is traditionally used for solving power system DAEs. The aspects of decomposition, solution and optimization of the algorithm for the specific problem are discussed and results from the application of the DDM on realistic power system models are presented. [less ▲]

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See detailEffect of heat treatment of rennet skim milk induced coagulation on the rheological properties and molecular structure determined by synchronous fluorescence spectroscopy and turbiscan
Blecker, Christophe ULg; Habib-Jiwan, Jean-Michel; Karoui, Ramdhane

in Food Chemistry (2012), 135(3), 1809-1817

Heat treatment applied to milk induces denaturation of whey proteins, leading to a complex mixture of whey protein and whey protein coated casein micelles. The present paper investigates the effects of ... [more ▼]

Heat treatment applied to milk induces denaturation of whey proteins, leading to a complex mixture of whey protein and whey protein coated casein micelles. The present paper investigates the effects of heat treatment (60 and 80 °C during 20 min) and rennet-induced coagulation temperature (30 and 40 °C) determined by rheology, synchronous fluorescence spectroscopy (SFS) and turbiscan measurements. The gelation times determined by rheology and SFS increased with the increase of heat treatment applied to milk. The rise in temperature induced a decrease in the maximum curd firming rate and an increase in the viscosity of the investigated milk samples. The principal component analysis (PCA) applied, sepa- rately, to the SF and turbiscan spectra showed a clear discrimination between: (i) raw milks and heated milks; and (ii) milks renneted at 30 °C from those renneted at 40 °C. The results showed the ability of SFS as a rapid and non-destructive technique for the: (i) monitoring network structure and molecular inter- action during the coagulation process; and (ii) determination of gelation time of rennet-induced coagu- lation of studied milk samples. [less ▲]

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See detailImpact of spatial resolution on the modelling of the Greenland ice sheet surface mass balance between 1990–2010, using the regional climate model MAR
Franco, Bruno ULg; Fettweis, Xavier ULg; Lang, Charlotte et al

in Cryosphere (The) (2012), 6

With the aim to force an ice dynamical model, the Greenland ice sheet (GrIS) surface mass balance (SMB) was modelled at different spatial resolutions (15-50 km) for the period 1990-2010, using the ... [more ▼]

With the aim to force an ice dynamical model, the Greenland ice sheet (GrIS) surface mass balance (SMB) was modelled at different spatial resolutions (15-50 km) for the period 1990-2010, using the regional climate model MAR (Modèle Atmosphérique Régional) forced by the ERA-INTERIM reanalysis. This comparison revealed that (i) the inter-annual variability of the SMB components is consistent within the different spatial resolutions investigated, (ii) the MAR model simulates heavier precipitation on average over the GrIS with diminishing spatial resolution, and (iii) the SMB components (except precipitation) can be derived from a simulation at lower resolution with an intelligent interpolation. This interpolation can also be used to approximate the SMB components over another topography/ice sheet mask of the GrIS. These results are important for the forcing of an ice dynamical model, needed to enable future projections of the GrIS contribution to sea level rise over the coming centuries. [less ▲]

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See detailExperiment investigations of 2D stationary mixed flows and numerical conparison
Nguyen, Van Nam ULg; Erpicum, Sébastien ULg; Dewals, Benjamin ULg et al

in Proceedings of the 2nd IAHR Europe Congress (2012, June 27)

Experimental investigations have been carried out to observe the mechanisms of stationary mixed flows in a flume combined with a conduit. The tests have been performed for varied discharges, considering ... [more ▼]

Experimental investigations have been carried out to observe the mechanisms of stationary mixed flows in a flume combined with a conduit. The tests have been performed for varied discharges, considering two 4.2m long rectangular channels 0.985m wide and 0.50m deep, linked by a 2m long closed conduit with a 0.20m wide and 0.15m high rectangular cross-section, located at the channels bottom along the right bank. The experimental results have been compared with numerical modeling performed using an original 2D numerical model, dealing with mixed flows using a single set of equations. [less ▲]

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See detailLe consommateur mineur. Analyse juridique de la protection d'une personne doublement vulnérable
Nottet, Aurélie ULg

Doctoral thesis (2012)

La dissertation porte sur le statut juridique du consommateur mineur en Belgique, dans une vision intégrée mêlant droit des incapacités et droit de la consommation. Le mineur, personne vulnérable en ... [more ▼]

La dissertation porte sur le statut juridique du consommateur mineur en Belgique, dans une vision intégrée mêlant droit des incapacités et droit de la consommation. Le mineur, personne vulnérable en raison de son âge, est protégé par le droit. Notamment, il est soumis à un statut civil d’incapacité qui l’empêche de contracter valablement seul (art. 1124 C. civ.). Le consommateur, « personne physique qui acquiert ou utilise à des fins excluant tout caractère professionnel des produits mis sur le marché », est également protégé par le droit (règles consuméristes) en tant que partie faible au contrat conclu avec une entreprise. Le mineur consommateur s’impose comme une réalité (notamment avec l’avènement d’Internet). Destinataire de nombreux produits, cible privilégiée des annonceurs publicitaires, il devient un acteur économique à part entière. Comment le droit encadre cette réalité ? Quel statut réserve-t-il au consommateur mineur ? Ce statut est-il satisfaisant ? La thèse tend à répondre à ces questions. Elle brosse donc un portrait juridique précis du consommateur mineur, et propose quelques améliorations de lege ferenda. Elle comporte du reste une dimension de droit comparé: sur les points centraux, des solutions de droit français, néerlandais et allemand enrichissent l’analyse du droit belge. Elles en permettent une critique plus objective et/ou inspirent des solutions originales. [less ▲]

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See detailÉtude de la dissipation d'énergie sur un coursier en marches d'escalier en aval d'un évacuateur de crue de type PKW
Silvestri, Aurélien ULg

Master's dissertation (2012)

The present research follows a previous study led by Erpicum et al. in 20112. The main purpose of this study is to affirm by experiments the theory, which states that in some particular cases, using a ... [more ▼]

The present research follows a previous study led by Erpicum et al. in 20112. The main purpose of this study is to affirm by experiments the theory, which states that in some particular cases, using a piano key weir (PKW) at the top of a stepped spillway instead of a standard ungated spillway with an equal length would result in an increased dissipation of energy. Another way to present this theory is to show that specific geometrical dimensions of the piano key weir can be determined to reach an uniform flow for reduced dimensions of stepped spillways (compared to standard ungated weir). The second goal is to set up analytical methods enabling the evaluation of the energy dissipation on this kind of construction using basic data’s (ex. inclination and geometry of the spillway, geometry of the steps on the spillway, flow,…). In order to reach those objectives, a series of experiments has been executed on a facility at the HECE laboratory. The tests allowed us to acquire different hydraulic parameters that have been used to calculate the energy dissipation on the reduced bench test. It is important to notice that we used an experimental analyzing method for signals. First of all, we have been able to prove the validity of the initial theory using the results of the tests on the facility. Secondly, the analyze and interpretation of the results led us to define criteria’s indicating the apparition of the uniform or non uniform flow depending of the kind of weir used on the spillway. Finally, using the results of the tests we established some analytical formulas for each kind of flow on a free weir and a PKW. Those analytical formulas present a correlation with experiments moreless accurate depending on the interpolation choosen and the set of bench tests realized. [less ▲]

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See detailSimulacres et Futurs antérieurs: Contributions à une approche narrative du politique
Claisse, Frédéric ULg

Doctoral thesis (2012)

The thesis assembles five publications dealing with the role played by fiction in our experience and apprehension of the world. Can fiction convey contents of knowledge or even constitute a source of ... [more ▼]

The thesis assembles five publications dealing with the role played by fiction in our experience and apprehension of the world. Can fiction convey contents of knowledge or even constitute a source of knowledge in itself? This question is broken down into a series of studies about the implicit sociology of American writer William S. Burroughs; industrial music as a critical device; the configuration power of Nineteen Eighty-Four in the denunciation of new technologies of surveillance and social control; the deep homology between power and narrativity; as well as counter-fiction within “societies of control”. The general introduction preceding these publications aims at building two examples of “fictional forms of intelligibility” conceived as cognitive and pragmatic resources used by members of society: “simulacrum”, which consists in criticising a target, in a systematically ironical mode, so as to turn its language and mode of functioning against it; “future perfect”, which proposes the anticipation of a threat described as having already occurred, in order to demonstrate the urgency in taking action to thwart it. The thesis defends a minimalist and holist conception of fictional knowledge: it is as a means at the service of the mimetic modelling of social and political processes that fiction activates a sense of possibilities and exerts a cognitive function. In this way, these collected works intend to give the first elements of a research programme in social and political sciences around power of and as a narrative. Narrative appears not only as an object, but especially as a tool for analyzing politics. [less ▲]

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See detailMariages simulés - perspective de droit international privé
Wautelet, Patrick ULg

Conference given outside the academic context (2012)

Ce support de présentation a été utilisé lors d'une après-midi de formation consacrée au droit familial international, organisée par l'Institut de formation judiciaire (http://www.igo-ifj.be). Il est ... [more ▼]

Ce support de présentation a été utilisé lors d'une après-midi de formation consacrée au droit familial international, organisée par l'Institut de formation judiciaire (http://www.igo-ifj.be). Il est consacré au mariage simulé. [less ▲]

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See detailMétamémoire pour des informations épisodiques et sémantiques dans la maladie d’Alzheimer.
Simon, Jessica ULg; Bastin, Christine ULg; Collette, Fabienne ULg et al

in Proceedings of the "XIIème Colloque International sur le Vieillissement Cognitif" (2012, June 25)

Quelques études ont examiné la précision du jugement concernant leur propre mémoire chez des patients présentant une maladie d’Alzheimer (MA) à l’aide de la procédure « Feeling-of-Knowing » (FOK). Dans ... [more ▼]

Quelques études ont examiné la précision du jugement concernant leur propre mémoire chez des patients présentant une maladie d’Alzheimer (MA) à l’aide de la procédure « Feeling-of-Knowing » (FOK). Dans cette procédure, le participant est invité à prédire sa capacité à reconnaître parmi des distracteurs l’item qu’il n’est pas parvenu à rappeler avant de passer à la phase de reconnaissance. Chez les patients en début de MA, la précision du jugement semble préservée lorsque la tâche implique la mémoire sémantique mais apparaît altérée lorsque la tâche implique la mémoire épisodique (Perrotin & Insingrini, 2010). Il existerait donc une dissociation dans la précision du jugement métacognitif chez les patients avec MA débutante entre les domaines épisodique et sémantique. Cependant, cette hypothèse n’a jamais été examinée au sein d’une même tâche. Dans cette étude, nous avons administré une version adaptée du FOK à 23 patients avec MA débutante et 17 sujets de contrôle. Les participants voyaient des visages de personnes dont ils avaient dû étudier le nom auparavant (items épisodiques) et des visages de personnes célèbres (items sémantiques). Pour chaque visage, les participants devaient indiquer la probabilité qu’ils reconnaissent le nom de la personne sur une échelle qualitative à 4 points (« Aucune chance », « Faible chance », « Forte chance », « Je le connais (rappel) ») puis reconnaître le nom parmi 3 distracteurs. La précision des jugements a été évaluée à l’aide du score de Hamann. Une ANOVA a révélé un effet significatif d’interaction entre le groupe et le domaine mnésique (P = .05), la moindre précision du jugement en mémoire épisodique étant exacerbée chez les patients avec MA. Cette étude renforce donc l’hypothèse selon laquelle il existe une dissociation entre les domaines épisodique et sémantique dans la capacité métacognitive des patients avec MA débutante. Perrotin, A. & Insingrini, M. (2010). La métamémoire et sa fonction de monitoring dans le vieillissement normal et dans la maladie d’Alzheimer. Revue de Neurospsychologie Neurosciences cognitives et cliniques, 2(4), 299-309. [less ▲]

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See detailSimplification du chargement aérodynamique sur une toiture de stade
Hamra, Lotfi ULg

Master's dissertation (2012)

The stochastic analysis of a structure subjected to turbulent wind gives estimation of the extreme (or peak) responses necessary for the structural design. These extreme values are established for each ... [more ▼]

The stochastic analysis of a structure subjected to turbulent wind gives estimation of the extreme (or peak) responses necessary for the structural design. These extreme values are established for each response within the structure (displacements, internal forces, reactions, etc ...). Notwithstanding, engineers from design office are used to design structures under static wind loads. The major challenge is thus to compute equivalent static loads that take into account the dynamic behavior of the structure and by simple static analyses, reconstruct the most accurately the extreme responses obtained from a stochastic dynamic analysis. Equivalent static wind loads are determined by applying various methods and the aim of this work is to extract a reduced basis, the principal static wind loads. These principal static wind loads are well suited for combinations in order to have a minimum number of design cases. Focus is made on the responses of the structure which are composed of mean, quasi-static and resonant contributions and on the number of design static wind loads to provide an accurate reconstruction of all extreme responses. [less ▲]

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