References of "Scientific congresses and symposiums"
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See detailElectrospinning of biocompatible polymers for potential biomdical applications
Croisier, Florence ULg; Zalfen, Alina; Aqil, Abdelhafid ULg et al

Poster (2008, June 23)

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See detailRenal failure and ICU-acquired infection
MICHIELS, Grégoire; WIESEN, Patricia ULg; LAYIOS, Nathalie ULg et al

Conference (2008, June 20)

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See detailReproducible Testing of Distributed Software with Middleware Virtualization and Simulation
Briquet, Cyril ULg; de Marneffe, Pierre-Arnoul ULg

in Ur, Shmuel (Ed.) Proceedings of the 6th Workshop on Parallel And Distributed systems: Testing, Analysis, and Debugging (2008, June 20)

P2P Grids are Grids organized into P2P networks where participant exchange computing time so as to complete computational tasks. Evaluating the performance of scheduling algorithms enables one to deploy ... [more ▼]

P2P Grids are Grids organized into P2P networks where participant exchange computing time so as to complete computational tasks. Evaluating the performance of scheduling algorithms enables one to deploy those that are efficient. Performance is often evaluated experimentally or through simulation because these algorithms (typically heuristics) are too complex to model analytically. Testing the implementation of P2P Grid middleware before it is deployed is also important: Reproducing configurations or conditions that lead to unexpected outcomes is thus valuable. A P2P Grid environment exhibits multiple sources of failure and is typically dynamic and uncontrollable. Reproducing even basic behavior of Grid nodes in a controllable and repeatable manner is thus exceedingly difficult. Such lack of control over the environment is a major challenge in the software engineering of P2P Grid middleware. Simulators have been proposed to evaluate the performance of scheduling algorithms, but are often limited in scope, reusability and accuracy, i.e. they rely on simplified models. We introduce a software engineering pattern - that we call code once, deploy twice - to both reduce the distance between simulated and implemented algorithms and reproduce, at will, Grid configurations and environments: A simulator implementation of a Grid architecture is built by virtualizing its middleware implementation. An immediate benefit is that most of the code can be reused between both implementations; only communications between Grid nodes, multithreading within Grid nodes and actual task execution are coded differently. As a derived benefit, most of the code of the middleware can be tested within the controlled environment of the simulator, before it is deployed as-is. Another benefit is high simulation accuracy. We describe the implementation of a P2P Grid following the code once, deploy twice pattern, that we believe is also relevant to other Grid types (certainly Volunteer Grids and Desktop Grids, and possibly Globus-based Grids). [less ▲]

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See detailSystems Theory in Systems Biology
Bullinger, Eric ULg

Conference (2008, June 20)

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See detailThe Driver Model of the traffic flow simulation PELOPS – modelling and application possibilities
Christen, Fréderic ULg; Huang, Q.

in 2nd Berlin Expert Conference on Driver Modelling “Driver Modelling in Science and Economy” (2008, June 20)

In diesem Beitrag wird zunächst das Verkehrssimulationsprogramms PELOPS vorgestellt. Dabei wird detailliert auf das in PELOPS enthaltene Fahrermodell eingegangen. Das Modell ist in der Lage, sowohl ... [more ▼]

In diesem Beitrag wird zunächst das Verkehrssimulationsprogramms PELOPS vorgestellt. Dabei wird detailliert auf das in PELOPS enthaltene Fahrermodell eingegangen. Das Modell ist in der Lage, sowohl einspuriges Folgeverhalten, als auch das Fahrverhalten beispielsweise bei Spurwechselmanövern realistisch abzubilden. Nach der Beschreibung des Modells wird die Methodik zur Entwicklung und Implementierung neuer Fahrermodellfunktionen erläutert. Hierbei werden die Vor- und Nachteile bei der Erfassung des Fahrerverhaltens anhand von Induktionsschleifen, Videodektionsanlagen, Fahrsimulatoren oder Messfahrzeugen beschrie- ben. Abschließend umreißt der Beitrag zwei Applikationsmöglichkeiten des Fahrermodells: Zum einen den Einsatz des Fahrermodells im Fahrsimulator und zum anderen die Integration des Fahrermodells als Reglers im Fahrzeug. [less ▲]

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See detailYouth Political Interest, Political Participation, and Civic Education in French-speaking Belgium
Fournier, Bernard ULg; Reuchamps, Min ULg

Conference (2008, June 18)

In spring 2007, we administered a survey to 1437 high school students (16-18 years old) in order to measure their political interest and participation as well as to assess their political knowledge ... [more ▼]

In spring 2007, we administered a survey to 1437 high school students (16-18 years old) in order to measure their political interest and participation as well as to assess their political knowledge. Relying on the results of some of the 150 questions, in this paper, we argue that uncovering the relationship between political interest, knowledge, and participation is a prerequisite for insightful and further research on civic education. So doing, we shall move our analysis beyond the usual sociological categories in order to stress differences between “clusters of students”. As such, we privilege the analysis in terms of classifications. With a more precise image of the various forms of youth’s political attitudes, different patterns will characterise young people’s opinions and behaviours. Accordingly, our understanding of the mechanisms of political socialisation will be adapted. Such an inquiry seems necessary in order to engage the traditional views on political participation and interest of today’s youth as well as the impact of civic education, for which further research, both quantitative and qualitative, is needed. [less ▲]

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See detailCoupled vs uncoupled approaches for sediment transport modelling
Dewals, Benjamin ULg

Conference (2008, June 18)

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See detailSur le concept de "valeur pure" chez Ferdinand de Saussure
Sofia, Estanislao ULg

Conference (2008, June 17)

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See detailAyahuasca et Iboga: secte et néo-chamanisme
Collart, Anne-Françoise ULg

Conference (2008, June 17)

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See detailPotential Estimation of Minerals Content in Cow Milk Using Mid-Infrared Spectrometry
Soyeurt, Hélène ULg; Bruwier, Damien; Gengler, Nicolas ULg et al

in ICAR Proceedings of the Biennial Sessions (2008, June 16)

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See detailEffect of Clonidine on Propofol and Remifentanil requirements using BIS score and the A-line ARX (AAI) index during laparoscopic gastric bypass in obese patients
Rosant, Séverine; Nkiko, Gédéon; Lauwick, Séverine ULg et al

in Acta Anaesthesiologica Belgica (2008, June 14), 59(3), 228

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See detailIntravenous lidocaine reduces propofol requirement during propofol - remifentanil anaesthesia for thyroid surgery
Charlier, Vanessa ULg; Lauwick, Séverine ULg; Hans, Grégory ULg et al

in Acta Anaesthesiologica Belgica (2008, June 14), 59(3), 204

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See detailEffect of intravenous lidocaine on the depth of propofol anesthesia assessed by the bispectral index (BIS)
Delangh, Virginie; Hans, Grégory ULg; Kaba, Abdourahmane ULg et al

in Acta Anaesthesiologica Belgica (2008, June 14), 59(3), 206

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See detailDo monitoring and counselling boost the job finding rates of the long-term unemployed ?
Fonder, Muriel; Lejeune, Bernard ULg

Conference (2008, June 13)

In July 2004, the Belgian government launched a new monitoring and counselling program targeted at the long-term unemployed. In this new program, people over 13 months unemployment are warned that their ... [more ▼]

In July 2004, the Belgian government launched a new monitoring and counselling program targeted at the long-term unemployed. In this new program, people over 13 months unemployment are warned that their job-search efforts will be monitored 8 months later. At the same time, they are invited to participate actively in the support (job search, training) programs provided for by the Regional Employment Agencies, whose supply was expanded. This reform has been implemented gradually : it focused the unemployed under 30 years in 2004, then the 30-40 year-old unemployed in 2005, and finally the 40-50 year-old unemployed in 2006. This paper aims at evaluate the effect, in terms of transition from unemployment to employment and/or training, of this new program for the 30-40 years old in Wallonia. Using the fact that the reform was implemented gradually, the effect of the program is estimated by difference-in-differences, based on (single exit and two exits) discrete duration models. The results suggest that the program has had a very large relative effect, although limited in absolute terms, regarding transition to training for almost all the treated unemployed. They also show that the program has had a substantial relative effect, although limited in absolute terms as well, with regard to transition to employment for the majority of the treated unemployed. [less ▲]

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See detailPhilosophie et modalités de la justice réparatrice.
Lauwaert, Katrien ULg

Conference (2008, June 13)

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See detailIS EPIZOOTIC RABBIT ENTEROPATHY (ERE) A BACTERIAL DISEASE?
Huybens, Nathalie ULg; Houeix, Julien ULg; Szalo, Ioan Mihai ULg et al

in Proceeding of the 9th World Rabbit Congress (2008, June 12)

The etiology of epizootic rabbit enteropathy (ERE) is still unknown despite ten years of continuous research. A putative bacterial etiology is at the basis of current research. The fractionation of the ... [more ▼]

The etiology of epizootic rabbit enteropathy (ERE) is still unknown despite ten years of continuous research. A putative bacterial etiology is at the basis of current research. The fractionation of the reference inoculum (TEC4) is a major step to find the potential bacterial agent(s). In this study, TEC4 was fractionated with two techniques: centrifugation on discontinuous sucrose gradient then cell adhesion. Two selected fractions were inoculated to SPF rabbits and analyzed with classical bacteriological techniques. ERE was reproduced with both fractions. The 16S rDNA gene was amplified in all fractions and in three negative controls and subsequently analyzed with Restriction Fragment Length Polymorphism (RFLP) and Denaturating Gradient Gel Electrophoresis (DGGE). A difference in bacterial DNA composition was found between virulent and non-virulent fractions which reinforce the potential role of bacteria in the etiology of ERE. [less ▲]

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See detailShort-term post-dispersal fate of seeds primarily dispersed by tamarins
Culot, Laurence ULg

Conference (2008, June 09)

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See detailThe arylthiadiazine 1,1-dioxides in medicinal chemistry
De Tullio, Pascal ULg

Conference (2008, June 08)

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See detailAnalyse des curriculums officiels et implantés dans les pays de la Confemen
Lejong, Michèle ULg

Conference (2008, June 07)

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See detailA new tracer technique for monitoring groundwater fluxes : the finite volume point dilution method
Brouyère, Serge ULg; Batlle-Aguilar, Jordi; Goderniaux, Pascal ULg et al

Conference (2008, June 06)

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See detailFormes et enjeux de la décentralisation théâtrale en Belgique francophone
Delhalle, Nancy ULg

Conference (2008, June 06)

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See detailLe positionnement des organisations de commerce équitable entre l’économique, le social et le politique : essai de typologie et illustrations en Belgique, en France et au Royaume-Uni
Huybrechts, Benjamin ULg

Conference (2008, June 05)

Parallèlement à la croissance exponentielle de ses ventes et de sa notoriété, le mouvement du commerce équitable (CE) connaît une diversification croissante de son paysage organisationnel (Nicholls & Opal ... [more ▼]

Parallèlement à la croissance exponentielle de ses ventes et de sa notoriété, le mouvement du commerce équitable (CE) connaît une diversification croissante de son paysage organisationnel (Nicholls & Opal, 2005; Wilkinson, 2007). Alors qu’à ses débuts, le mouvement était porté par des organisations militantes relativement homogènes, celles-ci se sont progressivement diversifiées, tandis que de nouveaux acteurs sont apparus avec une dynamique commerciale plus marquée (Gendron, 2004; Moore, 2004; Renard, 2003). Si toutes les organisations de commerce équitable (OCE) ont en commun de chercher à soutenir des organisations de producteurs au Sud à travers une activité commerciale « équitable » dans le cadre d'un développement durable Nord-Sud, les stratégies adoptées peuvent fortement différer (Wilkinson, 2007). Ainsi, en caricaturant quelque peu, certaines OCE misent principalement sur le partenariat commercial, encadré par un processus de labellisation, et prônent un développement essentiellement quantitatif de la filière, notamment à travers la distribution des produits en grandes surfaces. D'autres, par contre, insistent plus sur la qualité des partenariats avec les producteurs marginalisés et misent sur les activités de sensibilisation des citoyens et de lobbying auprès des pouvoirs publics dans le but de modifier en profondeur les règles du commerce international. Quelle que soit leur stratégie, les OCE sont inévitablement confrontées aux tensions traversant l’ensemble du mouvement équitable. Ces tensions semblent pouvoir se résumer, globalement et malgré certaines nuances dans les appellations, à deux grands pôles : le pôle économique, de « marché » d’une part, et le pôle socio-politique, de « solidarité » d’autre part. Ce qui différencie les OCE, c’est donc la manière de gérer cette tension et de se positionner par rapport à ces différentes logiques. L’objectif de cette contribution est précisément d’éclairer ces différents positionnements organisationnels sur le « continuum » entre l’économique et le socio-politique. Nous commençons par présenter ce continuum du CE sur lequel les acteurs se positionnent. Nous proposons ensuite différents indicateurs organisationnels susceptibles d'appréhender ces positionnements. A partir de la théorie des organisations appliquée à différentes formes organisationnelles, nous nous penchons sur les objectifs organisationnels, les ressources, le statut juridique et la composition des éventuelles instances de gouvernance (principalement l'assemblée générale et le conseil d'administration). Nous rappelons dans quelle mesure, selon la littérature, ces indicateurs peuvent être révélateurs du positionnement stratégique de l'organisation. Ensuite, nous proposons quatre profils organisationnels possibles pour gérer les tensions entre les différents pôles du CE. Chacun de ces profils est caractérisé par rapport aux indicateurs organisationnels proposés : objectifs déclarés, types de ressources mobilisées (ventes, dons, subventions, bénévolat), statut juridique (association, coopérative, entreprise individuelle, société anonyme,...) et composition des instances de gouvernance (types de parties prenantes impliquées). Chaque profil est ensuite illustré par des exemples d'organisations provenant de trois études de terrain réalisées auprès d’OCE en Belgique, en France (dans la région Rhône-Alpes) et au Royaume-Uni. Enfin, après une synthèse de ces quatre profils, nous nous penchons sur leurs implications sur l’avenir du mouvement équitable. Nous cherchons à percevoir l'évolution des stratégies de positionnement des OCE de manière à distinguer les perspectives futures de la filière. La question posée est de savoir si les différents profils de positionnement peuvent continuer à coexister de manière complémentaire ou si, au contraire, ils mènent à l'apparition de différentes formes de CE n'ayant plus en commun que leur appellation. [less ▲]

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See detailDividends and Foreign Performance Signaling
Muller, Aline ULg; Joliet, Robert

Conference (2008, June 04)

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See detailDevelopment of a decision-making tool to manage forest storm damage in the Walloon Region (Belgium)
Riguelle, Simon ULg; Jourez, Benoît ULg; Hebert, Jacques ULg

Poster (2008, June 03)

When an unexpected windthrow event occurs, the extent of damage may rapidly increase to reach a crisis level. Therefore, it requires a suitable and fast reaction by the public authorities and the ... [more ▼]

When an unexpected windthrow event occurs, the extent of damage may rapidly increase to reach a crisis level. Therefore, it requires a suitable and fast reaction by the public authorities and the concerned owners as well as by the whole sector of wood transformation. The aim of this research, which is a regional priority, relates to the realization of a decision-making tool thought not under the constraint of the urgency, when trees are lying down on the ground, but established on the basis of real dramatic cases already experienced in the past. The tool is dedicated to political and administrative services but, to be effective, calls upon a broad collaboration with all the partners of the wood sector. [less ▲]

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See detailIR and UV spectroscopic signatures of DNA higher-order structures in the gas phase
Gabelica, Valérie ULg; Rosu, Frédéric ULg; Gregoire, Gilles et al

Conference (2008, June 03)

Introduction Electrospray mass spectrometry (ESI-MS) can be used to transfer large biomolecular complexes from the solution to the gas phase. However, a longstanding question is whether the gas-phase ... [more ▼]

Introduction Electrospray mass spectrometry (ESI-MS) can be used to transfer large biomolecular complexes from the solution to the gas phase. However, a longstanding question is whether the gas-phase multiply-charged ions produced by ESI-MS keep a folded conformation in the absence of solvent. Nucleic acid secondary structures are determined by hydrogen bonding interactions between nucleic bases and by stacking interactions between neighboring base pairs. Here we will show that infrared (IR) and ultraviolet (UV) action spectroscopies provide useful and complementary information on the structure of nucleic acid ions in the gas phase. Methods IR spectroscopy experiments on DNA negative ions were carried out at the CLIO free electron laser (FEL) center (Orsay, France) using an Esquire 3000 (Bruker) mass spectrometer modified to inject the IR beam through the ring electrode. IRMPD spectra are recorded by monitoring the fragmentation of mass-selected parent ions as a function of the excitation wavenumber, in the range 1000-2000 cm-1. UV spectroscopy experiments were carried out using a tunable OPO laser (Continuum Lasers) with frequency doubling. The laser is interfaced with either a Finnigan LCQ ESI-QIT mass spectrometer or a Bruker Apex-Qe 9.4 T ESI-FTICR mass spectrometer. The UV action spectra were recorded by monitoring electron detachment as a function of the wavelength between 220 and 300 nm. Preliminary results First, DNA oligonucleotide ions forming G-quadruplex structures were studied in the gas phase using IR multiple-photon dissociation spectroscopy. Data interpretation on these large biomolecule ions is made using carefully chosen control experiments. The IR spectrum of the (dTG4T)4 quadruplex has been recorded, and compared to that of the single strand. Given the strand stoichiometry and the selective incorporation of three ammonium cations, there is little doubt about the quadruplex structure of [(dTG4T)4•(NH4+)3]5-. The major finding is a fingerprint of hydrogen bonding in the gas phase in the guanine C6=O6 stretching mode, that allows probing the conservation of G-quartets in the gas phase. Further experiments also demonstrate the conservation of G-quadruplex hydrogen bonds in the human telomeric sequence d(TTAGGG)4 [Gabelica et al., JACS, accepted]. Second, we also studied DNA duplexes and G-quadruplex ions in the gas phase by UV spectroscopy. We recorded the UV spectra of the (dTG4T)4 quadruplex, with and without ammonium ions. Molecular modeling [Rueda et al., JACS, 2006, p3608] and ion mobility spectrometry data [Gabelica et al., JACS, 2007, 895] showed that G-quadruplexes keep their hydrogen-bonded structure but become more floppy if inner cations are removed. We found that the UV spectra differ dramatically with and without inner cations, suggesting that UV spectroscopy is very sensitive to stacking interactions between neighboring G-quartets. We also used UV spectroscopy to probe the structure of 12-mer DNA duplexes, by comparing the duplex spectra to those obtained on single strands. Preliminary results show that stacking interactions may be preserved in duplexes containing GC base pairs, but not in duplexes containing AT base pairs. Altogether, these results show the complementarities between IR and UV spectroscopy to characterize DNA structures in the gas phase: IR data mainly give access to information on hydrogen bonding of bases, and UV spectroscopy provides information on stacking interactions. [less ▲]

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See detailSupercritical carbon dioxide, a tool for the dispersion ROP of lactone and PCL foaming: Part A
Grignard, Bruno ULg; Urbanczyk, Laetitia ULg; Stassin, Fabrice et al

Poster (2008, June 02)

Aliphatic polyesters, namely polylactide (PLA) and poly-ε-caprolactone (PCL) are biodegradable and biocompatible materials that find applications as resorbable suture (PLA) and drugs delivery vectors (PCL ... [more ▼]

Aliphatic polyesters, namely polylactide (PLA) and poly-ε-caprolactone (PCL) are biodegradable and biocompatible materials that find applications as resorbable suture (PLA) and drugs delivery vectors (PCL). Nevertheless, these polymers were mainly prepared by ring opening polymerization using aluminum alkoxide or tin alkoxide initiators in organic media. Recently, the use of supercritical carbon dioxide as polymerization medium was proposed as a potential alternative to the use toxic organic solvents. Nevertheless, due to the non-solubility of PCL in this medium, the growing chains rapidly precipitate during their synthesis leading to the formation of a bulky material that is typical of a precipitation polymerization. This work aims at investigating the dispersion ring-opening polymerization (ROP) of ε-caprolactone in the presence of fluoropolymer-based stabilizers, that were prepared by combining the ring opening polymerization of ε-caprolactone and atom transfer radical polymerization of heptadecafluorodecylacrylate (AC8) and so, stabilizing PCL micrometric particles in supercritical carbon dioxide. In practice, the ROP of CL was initiated by dibutyltin dimethoxide in the presence of PCL-b-PAC8 diblock stabilizers of differents molecular weight and composition. After 24h at 40°C, PCL was collected as a powder that consists of small-sized microspheres. Finally, post-polymerization purification of PCL (removal of tin catalyst that may lead to toxicological problems) was demonstrated to be quite feasible by supercritical fluid extraction (SFE) leading to the preparation of PCL with low catalytic residues. The second goal of this work aims at reporting on the use of sc CO2 for the preparation of foams of poly(epsilon-caprolactone) (PCL), that could be useful in the packaging sector and/or the biomedical sector as potential scaffolds for tissue engineering but also as substitutes for polystyrene thermoformed trays. The method that consists of saturating a polymer with a compressed or supercritical fluid, such as carbon dioxide followed by depressurization and polymer expansion was investigated. Indeed, no residual product is left in the foam, no toxic gas is produced and no resort to hydrocarbon solvents is required. Moreover, CO2 is cheap, non-toxic, recyclable, non-flammable and the technology of CO2-assisted foaming can be used in either a batch mode or in a continuous mode within a high-pressure extruder. [less ▲]

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See detailTable-ronde finale du colloque
Halleux, Jean-Marie ULg

Conference (2008, June 02)

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See detailClimatology and circulation of the Azores-Canary region by Data-Interpolation Variational Analysis
Troupin, Charles ULg; Machín, Francisco; Ouberdous, Mohamed ULg et al

Poster (2008, June 02)

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See detailConceptualiser des actions professionnelles vécues, une compétence travaillée avec les futurs formateurs d’enseignants.
Beckers, Jacqueline ULg; Van der Linden, Sylvie ULg

Conference (2008, June 02)

Cette communication se focalisera sur la préparation au métier de formateur d’enseignants organisée notamment dans le cadre d’un module intitulé « Didactique Professionnelle et Formation Initiale des ... [more ▼]

Cette communication se focalisera sur la préparation au métier de formateur d’enseignants organisée notamment dans le cadre d’un module intitulé « Didactique Professionnelle et Formation Initiale des enseignants » du master en Sciences de l’Education de l’université de Liège (ULg – Belgique). La première partie de ce module privilégie le développement chez les futurs formateurs d’une compétence clé à nos yeux : « Accompagner chaque futur enseignant dans la conceptualisation et la régulation de son activité professionnelle ». Cette compétence est à la fois travaillée sur le terrain (cette année, en classes maternelles) et à l’ULg. Certaines séances de cours dispensées aux futurs formateurs les mettent face à des tâches complexes, proches de celles qu’ils auront à gérer pendant les accompagnements. Elles sont amorcées par des mises en situations ou par des récits exemplaires de pratiques récoltés auprès de formateurs d’enseignants chevronnés. D’autres séances de cours sont destinées à garantir des ressources conceptuelles (didactique professionnelle, utilisation délibérative et non applicationniste de la théorie, caractéristiques du métier enseignant, développement des compétences professionnelles, construction identitaire, …) et techniques (entretien d’explicitation, utilisation des ressources pédagogiques sur Internet, construction d’outils d’observation, utilisation de la caméra, …) à mobiliser dans les tâches complexes puis sur le terrain. Pendant l’accompagnement, l’exploitation par les futurs formateurs de traces (données d’observation, enregistrements vidéos et audios) soutient des entretiens de régulation individualisés et une séance d’analyse de pratiques en petits groupes. Quand un observable soutient la réflexion, on peut faire l’hypothèse qu’il favorise la conceptualisation voire même le changement du cadre interprétatif, particulièrement quand le groupe des pairs introduit des perceptions différentes, des significations autres et suggère des pistes d’actions alternatives. [less ▲]

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See detailVorticity balance in the Northwestern African Upwelling
Troupin, Charles ULg; Mason, Evan; Sangrà, Pablo

Conference (2008, June 02)

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See detailAccompagner le développement du regard réflexif chez de futures institutrices préscolaires par la prise en compte de la diversité de leurs parcours, une compétence du formateur d’enseignants.
Van der Linden, Sylvie ULg

Conference (2008, June 02)

Pour instruire et éduquer leurs élèves, les enseignants mobilisent diverses compétences, résumées en « 13 compétences essentielles du métier » dans le décret réformant la Formation initiale des ... [more ▼]

Pour instruire et éduquer leurs élèves, les enseignants mobilisent diverses compétences, résumées en « 13 compétences essentielles du métier » dans le décret réformant la Formation initiale des enseignants préscolaires, primaires et du début du secondaire en Communauté Française de Belgique (décembre 2000). Les compétences que les formateurs des futurs enseignants cités mobilisent pour les accompagner dans le développement des compétences professionnelles et la construction identitaire, sont quant à elles résumées en « 14 compétences essentielles de ce deuxième métier » au sein du décret définissant le certificat d'aptitude pédagogique approprié à l'enseignement supérieur (juillet 2002). Cette communication se focaliserait sur le développement de la compétence porter un regard réflexif sur sa pratique pour développer chez des futurs enseignants préscolaires de première année de formation la capacité de réguler leur propre action et de se projeter dans le métier. En parallèle, le développement de la compétence promouvoir la réussite des étudiants notamment par la prise en compte de la diversité des parcours auprès de leur professeur de pédagogie sera décrit et analysé. [less ▲]

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See detailMagnetic Massive Stars
Townsend, Rich; Cohen, David H; Dessart, Luc et al

in IAU Symposium (2008, June 01)

Magnetic fields are unexpected in massive stars, due to the absence of a sub-surface convective dynamo. However, advances in instrumentation over the past three decades have led to their detection in a ... [more ▼]

Magnetic fields are unexpected in massive stars, due to the absence of a sub-surface convective dynamo. However, advances in instrumentation over the past three decades have led to their detection in a small but growing subset of these stars. Moreover, complementary theoretical developments have highlighted their potentially significant influence over the structure, evolution and circumstellar environments of massive stars. Here, we summarize a special session convened prior to the main conference, focused on presenting recent developments in the study of massive-star magnetic fields. [less ▲]

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See detailEuroPlaNet: Improving the Communication on Planetary Sciences
Nazé, Yaël ULg; Heward, A.

in EPO and a Changing World: Creating Linkages and Expanding Partnerships (2008, June 01)

EuroPlaNet is an EC-funded consortium. It coordinates the activities of European researchers working in planetary sciences but it is not only aimed at pure scientific activities. Its outreach action ... [more ▼]

EuroPlaNet is an EC-funded consortium. It coordinates the activities of European researchers working in planetary sciences but it is not only aimed at pure scientific activities. Its outreach action involves a networking of the members, in order to promote the planetary sciences in Europe, improve the public awareness of the major European achievements & projects, and stimulate the use of planetary sciences for the promotion of scientific education and culture at large. For more information: \url{http://www.europlanet-eu.org/} or \url{http://www.europlanet.cesr.fr/}. [less ▲]

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See detailInvestigating Circumferential Non-Uniformities in Throughflow Calculations using an Harmonic Reconstruction
Thomas, Jean-Philippe ULg; Léonard, Olivier ULg

in Proceedings of the ASME Turbo Expo 2008 (2008, June)

The flow field in a multistage turbomachine is very complex. It is 3D, unsteady and turbulent. Even if modern simulation tools can describe most of the flow features, the computation time needed and the ... [more ▼]

The flow field in a multistage turbomachine is very complex. It is 3D, unsteady and turbulent. Even if modern simulation tools can describe most of the flow features, the computation time needed and the extraction of useful information remain severe drawbacks to systematic use of URANS codes in a design procedure. In this context the throughflow simulation proved to be more convenient. Nevertheless the need for empiricism limits the potential of throughflow solvers. As an alternative, Admaczyck (1984) proposed three averaging operators (ensemble, time and passage) that lead to the average-passage model, linking the unsteady turbulent flow field to a steady flow field in a typical blade passage. This model involves additional terms that respectively bring back the mean effect of turbulence, deterministic unsteadiness and aperiodicity on the mean periodic flow. These terms need to be modelled; it is the closure problem. Harmonic closure, which consists in solving a linearized perturbation system in the frequency domain, revealed to be an efficient method to approximate deterministic stresses (He and Ning, 1998, Stridh, 2005, Vilmin, 2006). A fourth averaging can be performed, a circumferential averaging, giving rise to the throughflow model. Additional terms appear: the so-called circumferential stresses. It has been proven that these terms play an important role in the description of the flow (Jennions, 1986, Perrin, 1995), being at least as considerable as deterministic stresses. Introducing these terms in a throughflow simulation allows to reproduce the averaged 3D steady flow field (Simon, 2007). The aim of the present contribution is to prove that harmonic method can potentially be used to reconstruct circumferential stresses. The importance of circumferential stresses in a throughflow simulation is first highlighted on a single stage low speed compressor testcase, for viscous and non-viscous flow fields. The second step is the characterization of the frequency spectrum of the circumferential perturbation field. Next are compared the stresses associated to a Fourier reconstruction of the perturbation field with the real ones. Finally the approximated circumferential stresses are injected into a throughflow simulation tool to analyse and demonstrate their capability to reproduce a 3D averaged flow field. [less ▲]

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See detailLearning and Teaching Paradigms applied in e-Learning
Denis, Brigitte ULg

Conference (2008, June)

Description of teaching and learning paradigms applied in elearning environments.The model presented sustains the instructional design of such environments.

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See detailFinite Element Simulations of Simple 2-D Geometries in Slamming
Constatinescu, A.; Neme, A.; Jacques, N. et al

in Int. Conf. OMAE-2008, ASME, Estoril, Portugal, June 2008, Paper 57482 (2008, June)

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See detailComparison of bovine and human O26 EHEC strains by the Whole Genome PCR Scanning
Bardiau, Marjorie ULg; Ogura, Y.; Hayashi, T. et al

Conference (2008, June)

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See detailAccompagnement d’équipes d’intervenants dans le traitement du décrochage scolaire : apports d’une approche qualité dans la mise en place de pratiques réflexives
Plunus, Ghislain ULg; Gilles, Jean-Luc ULg; Polson, Delphine ULg et al

in Chafiqi, Fouad (Ed.) 15e Congrès international de l’AMSE-AMCE-WAER sous le patronage de l’UNESCO - Mondialisation et éducation : vers une société de la connaissance - Recueil des résumés des conférences et des communications - Tome I (2008, June)

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See detailA crossed random effects model to detect differential item functioning
Frederickx, Sofie; Magis, David ULg; Tuerlinckx, Francis et al

Conference (2008, June)

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See detailThe restoration of the longitudinal connectivity in Southern Belgian rivers. Synthesis of a 10-years study and perspectives
Ovidio, Michaël ULg; Orban, Patrice; Lambot, Francis et al

Conference (2008, June)

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See detailEffects of a single 5 mg infusion of zoledronic acid and oral risedronate (5 mg/day) on bone remodeling over one year in patients with glucocorticoid-induced osteoporosis
Saag, K. G.; Devogelaer, Jean-Pierre; Reid, D. M. et al

in Annals of the Rheumatic Diseases (2008, June), 67(Suppl.II), 542

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See detailHST observations of gravitationally lensed QSOs
Claeskens, Jean-François ULg; Sluse, Dominique ULg; Surdej, Jean ULg

in proceedings of the 41st ESLAB Symposium "The Impact of HST on European Astronomy" (June 2007) (2008, June)

Thanks to its sharp view, HST has significantly improved our knowledge of tens of gravitationally lensed quasars in four different respects: (1) confirming their lensed nature; (2) detecting the lensing ... [more ▼]

Thanks to its sharp view, HST has significantly improved our knowledge of tens of gravitationally lensed quasars in four different respects: (1) confirming their lensed nature; (2) detecting the lensing galaxy responsible for the image splitting; (3) improving the astrometric accuracy on the positions of the unresolved QSO images and of the lens; (4) resolving extended lensed structures from the QSO hosts into faint NIR or optical rings or arcs. These observations have helped to break some degeneracies on the lens potential, to probe the galaxy evolution and to reconstruct the true shape of the QSO host with an increased angular resolution. [less ▲]

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See detailThe problem of odours when drying sewage sludges
Léonard, Angélique ULg; Nicolas, Jacques ULg; Romain, Anne-Claude ULg et al

Conference (2008, June)

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See detailPrevalence of vitamin D inadequacy in institutionalized osteoporotic postmenopausal women
Bruyère, Olivier ULg; Delhez, M.; Collette, Julien ULg et al

in Annals of the Rheumatic Diseases (2008, June), 67(Suppl.II), 403

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See detailDuctility requirements for the design of bolted shear connections
Henriques, José; Jaspart, Jean-Pierre ULg; Piraprez, E.

in Proceedings of the Sixth International Workshop on Connections (2008, June)

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See detailDéstabilisation membranaire et peptides obliques : état des lieux
Lins, Laurence ULg

Conference (2008, June)

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See detailEvaluation de la qualité de vie d’enfants avec antécédents de pathologie oncologique
Missotten, Pierre ULg; Spitz, Elisabeth; Hoyoux, Claire

Conference (2008, June)

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See detailLeast-Cost Development of Hydrogen Transmission-Distribution Pipeline Networks
Andre, Jean; Brac, Jean; de Wolf, Daniel ULg et al

Conference (2008, June)

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See detailDistribution of serotypes of clinical group B streptococci isolated in Belgium: a decade review
MELIN, Pierrette ULg; De Mol, Patrick ULg

in LISSSD Board (Ed.) Abstract book (2008, June)

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See detailImpact of pre-treatment processing on cereal by-products valorisation through enzymatic extraction of ferulic acid.
Barberousse, Hélène; Roiseux, Olivier; Deroanne, Claude et al

Poster (2008, June)

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See detailValidity and design of learning settings in particular context: Learning with Simulations in medical education
Blavier, Adelaïde ULg; Aboulafia, A.; Fischer, F. et al

Conference (2008, June)

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See detailRelationship between long-term changes in femoral neck bone mineral density and hip fracture incidence in untreated postmenopausal osteoporotic women
Bruyère, Olivier ULg; Brandi, M.; Vellas, B. et al

in Annals of the Rheumatic Diseases (2008, June), 67(Suppl.II), 403

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See detailRewritable VPHGs based on photochromic materials
Bianco, A.; Toso, G.; Dassa, G. et al

in Attad-Ettedqui, A.; Lemke, D. (Eds.) Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation (2008, June)

Volume phase holographic gratings (VPHGs) are becoming an interesting alternative to the ruled gratings in modern astronomical instrumentation. Photochromic materials with thermal stability are good ... [more ▼]

Volume phase holographic gratings (VPHGs) are becoming an interesting alternative to the ruled gratings in modern astronomical instrumentation. Photochromic materials with thermal stability are good candidates for the development of holographic optical elements and in particular for VPHGs. VPHGs based on photochromic materials can be written and erased many times without the degradation of the material; moreover the material does not need any developing process after the exposure, making the writing process very simple. We have already studied photochromic materials for this aim in the framework of the JRA6 (Opticon Project, FP6) and we found that large modulations of the refractive index can be achieved using diarylethene polymers. Going from the materials characterization to technology, substrates with larger thickness and good optical properties are required. Herein we present the development of new technique to tailor the thickness of the photochromic films in two ranges: 5 - 30 micron and 700 - 1000 micron. The former are suitable for the development of broadband VPHGs, whereas the latter are suitable for narrow band tunable filters application. Details on the optical properties of the films are reported. Finally, a holographic set-up based on an Ar+ laser has been optimized in order to write the gratings. [less ▲]

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See detailFast mapping between grammatical constructions and meaning: An experiment in French children aged 3 to 4
Parisse, Christophe; Dupont, Fanny; Bourdoux, Françoise et al

Poster (2008, June)

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See detailNonlinear modal analysis and energy localization in a bladed disk assembly
Georgiades, Fotios; Peeters, Maxime ULg; Kerschen, Gaëtan ULg et al

in ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008 (2008, June)

The objective of this study is to carry out modal analysis of nonlinear periodic structures using nonlinear normal modes (NNMs). The NNMs are computed numerically with a method developed in [18] that is ... [more ▼]

The objective of this study is to carry out modal analysis of nonlinear periodic structures using nonlinear normal modes (NNMs). The NNMs are computed numerically with a method developed in [18] that is using a combination of two techniques: a shooting procedureand a method for the continuation of periodic motion. The proposed methodology is applied to a simplified model of a perfectly cyclic bladed disk assembly with 30 sectors. The analysis shows that the considered model structure features NNMs characterized by strong energy localization in a few sectors. This feature has no linear counterpart, and its occurrence is associated with the frequencyenergy dependence of nonlinear oscillations. [less ▲]

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See detailIMPROVE - Design of Improved and Competitive Products
Giuglea, S.; Chirica, I.; Giuglea, V. et al

in DBlaS'2008, I&CT Intern. Conf., Istanbul, Turkey, 16-18 June 2008 (2008, June)

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See detailMise en place d’un protocole d’intervention dans le traitement du décrochage scolaire : les apports de l’approche qualité en intervention éducative proposée par la DGIE
Plunus, Ghislain ULg; Gilles, Jean-Luc ULg; Polson, Delphine ULg et al

in Chafiqi, Fouad (Ed.) 15e Congrès international de l’AMSE-AMCE-WAER sous le patronage de l’UNESCO - Mondialisation et éducation : vers une société de la connaissance - Recueil des résumés des conférences et des communications - Tome I (2008, June)

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See detailLes enjeux énergétiques du XXIème siècle auront-ils des impacts territoriaux ?
Hauglustaine, Jean-Marie ULg

in Territoire(s) Wallon(s) (2008, June)

There is no longer any need to pinpoint the global stakes of the conservation of energy resources and global warming. Every decision-maker, every manager, every individual is concerned by these problems ... [more ▼]

There is no longer any need to pinpoint the global stakes of the conservation of energy resources and global warming. Every decision-maker, every manager, every individual is concerned by these problems, for which their decision, the entity that they represent, and heir behaviour will interfere at their respective scale. But beyond the impact on individuals, will these stakes have territorial impact? [less ▲]

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See detailPremiers résultats de l'enquête internationale sur les Pratiques Docimologiques dans l'Enseignement Supérieur (PraDES)
Gilles, Jean-Luc ULg

in Chafiqi, Fouad (Ed.) Mondialisation et éducation - Vers une société de la connaissance. Recueil des résumés des conférences et des communications (tome I) (2008, June)

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See detailSimilar non-vertebral antifracture efficacy demonstrated with monthly ibandronate versus weekly bisphosphonate therapy: A retrospective cohort study
Reginster, Jean-Yves ULg; Barr, C. E.; Blumentals, W. A. et al

in Annals of the Rheumatic Diseases (2008, June), 67(Suppl.II), 539

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See detailPlastic capacity of semi-compact steel sections
Lechner, A.; Kettler, M.; Greiner, R. et al

in Proceedings of the CIMS2008 - Coupled Instabilities in Metal Structures (2008, June)

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See detailIsokinetic assessment of the scapular muscles in serratus anterior dysfunction
Forthomme, Bénédicte ULg; Wang, François-Charles ULg; Crielaard, Jean-Michel ULg et al

in Journal of Rehabilitation Medicine Supplement (2008, June), 47

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See detailTools and services to sustain collaborative edition, share and capitalization of knowledge
Denis, Brigitte ULg

Conference (2008, June)

Presentation of several tools used to support collaborative edition. Issues about sharing, capitalizing and managing knowledge.

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See detailAutonomie, quels concepts? Quelles interventions?
Mathys, Cécile ULg

Conference (2008, June)

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See detailAssociation between lumbar disc degeneration and biochemical markers of bone and cartilage remodelling
Bruyère, Olivier ULg; Collette, Julien ULg; Christiansen, F. et al

in Annals of the Rheumatic Diseases (2008, June), 67(Suppl.II), 231

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See detailInternal dynamics from asteroseismology for two sdB pulsators residing in close binary systems
Van Grootel, Valérie ULg; Charpinet, Stéphane; Fontaine, Gilles et al

Conference (2008, June)

Since their discovery eleven years ago, short-period pulsating sdB stars have proved their potential for quantitative asteroseismological studies. We have recently updated our asteroseismic diagnostic ... [more ▼]

Since their discovery eleven years ago, short-period pulsating sdB stars have proved their potential for quantitative asteroseismological studies. We have recently updated our asteroseismic diagnostic tools in order to incorporate the effects of stellar rotation on pulsations, assuming various internal rotation laws. It was possible, with these new tools, to determine the internal rotation profile of two short-period pulsating sdB stars residing in close binary systems, namely Feige 48 and PG 1336−018. They exhibit orbital periods of, respectively, 9.024 h and 2.424 h measured from spectroscopy. For the two stars, we show that spin-orbit synchronism is reached from the surface down to ∼ 0.22 R∗ and 0.55 R∗, respectively. The rotation of deeper layers cannot be inferred with the type of modes observed in short-period pulsating sdB stars. These results could also provide new elements to test tidal friction theories, particularly the angular momentum transport, in close binary systems. [less ▲]

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See detailOn the Role of the Deterministic and Circumferential Stresses in Throughflow Calculations
Simon, Jean-Francois; Léonard, Olivier ULg

in Proceedings of the ASME Turbo Expo 2008 (2008, June)

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See detailA PERIOD3 polymorphism predicts fMRI assessed brain responses following sleep loss
Vandewalle, Gilles ULg; Archer, SN; Wuillaume, C et al

Conference (2008, June)

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See detailOptimization or Rolling and Floating Lock Gates
Rigo, Philippe ULg; Pircalabu, Eugen ULg; Amrane, Amirouche ULg et al

in PIANC'08 (2008, June)

This paper presents a methodology to minimize the weight of the gate by optimizing simultaneously the height of the floating tanks, the number of their watertight partitions and the gate scantling while ... [more ▼]

This paper presents a methodology to minimize the weight of the gate by optimizing simultaneously the height of the floating tanks, the number of their watertight partitions and the gate scantling while considering the floating stability (Richir et al. 2006) The rolling gate, considered for this lock, has to float to be led into the port for maintenance or repairing operations. Two partitioned floating tanks are used inside the gate. Water ballast can be pumped from the floating tanks to float the structure or to restore the mass equilibrium in case of damage due to boat impact. [less ▲]

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See detailStatistical validation of the Positive and Negative Occupational Stress Inventory.
Barbier, Marie ULg; Peters, Stéphanie ULg; Hansez, Isabelle ULg

Poster (2008, June)

With the emergence of positive psychology a decade ago, focus on psychology has shifted from human weaknesses to human resources. In work psychology, researchers are interested not only in negative ... [more ▼]

With the emergence of positive psychology a decade ago, focus on psychology has shifted from human weaknesses to human resources. In work psychology, researchers are interested not only in negative responses to professional demands, but also in positive responses. The Positive and Negative Occupational Stress Inventory (PNOSI) was designed to measure both constructs with separate items. This idea was later confirmed by Schaufeli, Salanova, Gonzalez-Roma & Bakker (2002) , according to which positive and negative occupational stress are distinct constructs with different causes and consequences, and should be measured with different items. We first asked 150 psychology students to generate words describing positive and negative stress. This enabled us to elaborate 34 items relating to emotional, cognitive, behavioural and physiological stress manifestations. These items were administered to 152 workers. Exploratory factor analyses showed a two-factor underlying structure. The first factor consisted of eleven items measuring Negative Occupational Stress (NOS), the second consisted of eight items measuring Positive Occupational Stress (POS). This structure was tested on another sample of 4666 workers. Exploratory factor analyses confirmed the two-factor structure. The two subscales have good psychometric properties, α = .87 and α = .84 for NOS and POS, respectively. Results show that the PNOSI can be considered a valid tool for measuring positive and negative sides of well-being at work. Further confirmatory factor analyses should first try to confirm and replicate this structure on different samples. Second, convergent and discriminant validity with related concepts, such as burnout and engagement, should also be tested. [less ▲]

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See detailEfficiency of sieving or classification for dry fractionation of aot mills and beta-glucans enrichment.
Roiseux, Olivier; Vanderbeke, E.; Blecker, Christophe ULg et al

Poster (2008, June)

Detailed reference viewed: 16 (3 ULg)