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See detailMise au point d’une procédure de caractérisation quantitative des surfaces démolies en béton en vue de travaux de réfection
Bélair, Normand; Bissonnette, Benoît; Courard, Luc ULg

in Progression de la recherche québécoise sur les ouvrages d'art (2003)

Cet article présente l’état d’avancement d’un projet visant le développement et la validation d’une technique permettant de caractériser de façon quantitative l’intégrité mécanique d’une surface en béton ... [more ▼]

Cet article présente l’état d’avancement d’un projet visant le développement et la validation d’une technique permettant de caractériser de façon quantitative l’intégrité mécanique d’une surface en béton préparée (démolie) aux fins de travaux de réfections superficielles. Dans un premier temps, une étude de l’influence des variables de base (taille des pastilles métalliques, profondeur de forage, nature de l’adhésif, etc.) relatives à l’essai d’arrachement sur la cohésion du béton a été réalisée afin d’optimiser la procédure expérimentale. De plus, les performances comparatives de deux dispositifs d’essai disponibles commercialement ont été évaluées afin d’identifier l’appareil le mieux adapté (facilité et rapidité d’exécution, efficacité, reproductibilité, coût, etc.). Afin de valider le protocole expérimental retenu et d’évaluer quantitativement les effets du mode de démolition, des essais d’arrachement ont été réalisés en laboratoire sur une série d’éléments en béton dont la surface a été préparée au moyen de différentes méthodes de préparation, notamment le marteau pneumatique, la scarification, le jet de sable et le jet d’eau. Une technique de caractérisation quantitative de la rugosité de surface a également été élaborée. Sur la base de ces essais, il est possible d’établir l’influence du mode de démolition sur l’intégrité mécanique de la surface obtenue et d’émettre des recommandations préliminaires. [less ▲]

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See detailSedimentology of the Frasnian carbonate platform of Belgium, Facies and magnetic susceptibility
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

in Abstract book 12th Bathurst meeting of carbonate sedimentologists (2003)

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See detailUtilisation de boîtiers de vote électroniques lors de travaux pratiques et travaux dirigés de biologie (niveau 1ère candidature)
Noel-Lambot, F.; Detroz, Pascal ULg

in Les technologies de l'information et de la communication : mutations dans la formation scientifique universitaire : actes du colloque CIRUISEF-AUF, Dakar, mars 2003 (2003)

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See detailDévelopper les collaborations entre les classes de l'enseignement fondamental et les bibliothèques publiques
Baye, Ariane ULg; Crepin, Françoise ULg; Hindryckx, Geneviève ULg et al

in Trefois, J. C. (Ed.) Lire ensemble : écoles et bibliothèques, vers des synergies nouvelles (2003)

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See detailConclusions [Femmes et génocide]
Fierens, Jacques ULg

in Fierens, Jacques (Ed.) Femmes et génocide. Le cas du Rwanda. Actes du colloque organisé par le Centre Droits fondamentaux & lien social de Namur le 20 septembre 2002 (2003)

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See detailOn-axis VLT spectroscopy of quasar host galaxies: HE 1503+0228, at z=0.135
Courbin, F.; Letawe, Géraldine ULg; Magain, Pierre ULg et al

in Active Galactic Nuclei: From Central Engine to Host Galaxy (2003)

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See detailEpreuves externes : évaluation de la qualité des apprentissages ou des curricula ?
Lafontaine, Dominique ULg

in Actes du 15e colloque international de l'ADMEE-Europe et congrès annuel de la SSRE, Université de Lausanne, 5-7 septembre 2002 (2003)

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See detailA reinforcement learning based discrete supplementary control for power system transient stability enhancement
Glavic, Mevludin; Ernst, Damien ULg; Wehenkel, Louis ULg

in Proceedings of the 12th Intelligent Systems Application to Power Systems Conference (ISAP 2003) (2003)

This paper proposes an application of a Reinforcement Learning (RL) method to the control of a dynamic brake aimed to enhance power system transient stability. The control law of the resistive brake is in ... [more ▼]

This paper proposes an application of a Reinforcement Learning (RL) method to the control of a dynamic brake aimed to enhance power system transient stability. The control law of the resistive brake is in the form of switching strategies. In particular, the paper focuses on the application of a model based RL method, known as prioritized sweeping, a method proven to be suitable in applications in which computation is considered to be cheap. The curse of dimensionality problem is resolved by the system state dimensionality reduction based on the One Machine Infinite Bus (OMIB) transformation. Results obtained by using a synthetic four-machine power system are given to illustrate the performances of the proposed methodology. [less ▲]

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See detailFeeding behaviour of weaned pigs fed either pellets or meal: effects of the number of animals per feeding place
Laitat, Martine ULg; Vandenheede, Marc ULg; Desiron, Alain et al

in Ferrante, V. (Ed.) Proceedings of the 37th International Congress of the International Society for Applied Ethology (2003)

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See detailLes méthodes particulières de recherche - Aperçu de la loi du 6 janvier 2003
Jacobs, Ann ULg

in Masset, Adrien; Jacobs, Ann (Eds.) Actualités de droit pénal et de procédure pénale (2003)

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See detailSérapis et l'aigle : polysémie d'un iconotype
Veymiers, Richard ULg

in Cannuyer, Christian (Ed.) Les lieux de culte en Orient. Jacques Thiry in honorem (2003)

Detailed reference viewed: 63 (9 ULg)
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See detailMetabolic properties of bovine muscles: regulation by genetic and nutritional factors.
Hocquette, J. F.; Cabaraux, Jean-François ULg; Jurie, C. et al

in Book of absracts of the 54th Annual Meeting of the European Association for Animal Production (2003)

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See detailEtude des impacts hydrauliques, sédimentologiques et écologiques liés aux travaux hydrauliques sur la Semois
Gob, Frédéric ULg; Houbrechts, Geoffrey ULg; Mols, Julien et al

in Schmitz, Serge (Ed.) Les Journées des Géographes Belges: Evaluer la capacité du milieu (2003)

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See detailLa mission pénale de l'auditorat du travail: un mouvement de balancier
Kefer, Fabienne ULg

in Espace judiciaire et social européen (2003)

Detailed reference viewed: 68 (3 ULg)
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See detailNon destructive analysis of a 16th manuscript from the Gospel Book of Robert Quercentius
Denoël, Sophie; Weber, Georges ULg; Allart, Dominique ULg et al

in Townsend, Joyce; Eremin, Katherine; Adriaens, Annemie (Eds.) Conservation Science 2002. Papers from the Conference held in Edinburgh, Scotland 22-24 May 2002 (2003)

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See detailMicrofabrication of gold wires for atom guides
Koukharenko, Elena; Moktadir, Zakaria; Bagnall, D. et al

in Eurosensors XVII, 17th European Conference on Solid-State Transducers (2003)

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See detailSaint Remacle de Malmedy et de Stavelot. Entre mythe et réalité
George, Philippe ULg

in « Le monastère de Wavreumont dans l’histoire » (1er-3 mars 2001) (2003)

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See detailDevelopment of a database linked to a GIS for coupling with groundwater modelling tools
Ruthy, Ingrid ULg; Orban, Philippe ULg; Gogu, Radu Constantin et al

in Iu (Ed.) Computational Methods in Engineering and Science (2003)

Groundwater analysis strongly depends on the availability of large volumes of high-quality data. Putting all data in a coherent and logical structure supported by a computing environment helps ensure ... [more ▼]

Groundwater analysis strongly depends on the availability of large volumes of high-quality data. Putting all data in a coherent and logical structure supported by a computing environment helps ensure validity and availability and provides a powerful tool for hydrogeological studies. A hydrogeological Geographical Information System (GIS) database that offers facilities for hydrogeological modeling has been designed in Belgium for the Walloon Region. Interest is growing in the potential for integrating GIS technology and groundwater simulation models. A “loose-coupling” tool was created between the spatial database scheme and the groundwater numerical model interface GMS© (Groundwater Modeling System). Following time and spatial queries, the hydrogeological data stored in the database can be easily used within different groundwater numerical models. [less ▲]

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See detailEnquête sur les habitudes et les attitudes de lecture des jeunes de 14-15 ans en Communauté française de Belgique
Lafontaine, Dominique ULg

in Actes du 4e congrès international de la recherche en éducation et formation, AECSE, Lille, 2001 (2003)

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See detailRéflexions sur l'anthropologie du temps: Le cas de l'Egypte ancienne. Questions et méthodes
Winand, Jean ULg

in Pirenne, Vinciane (Ed.) Représentations du temps dans les religions (2003)

Detailed reference viewed: 133 (6 ULg)
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See detailPrognostic value of clinical signs and blood parameters in equids suffering from acute hepatic insufficiency: a retrospective study on 31 cases
Amory, Hélène ULg; Perron, MF; Sandersen, Charlotte ULg et al

in Proceedings of the 21st ACVIM annual meeting, Charlotte, North Carolina (2003)

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See detailThe architectural sketch and the concept of the absent interface
Leclercq, Pierre ULg

in Proceedings of theInternational Conference on Industrial Engineering and Production Management (2003)

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See detailSession hépatique : illustration par une revue de cas cliniques
Amory, Hélène ULg

in Proceedings of the Annual meeting of the French Equine Veterinary Association (AVEF) (2003)

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See detailAbsent Sketch Interface in Architectural Engineering
Leclercq, Pierre ULg

in Proceedings of the 5th IAPR International Workshop on Graphics Recognition (2003)

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See detailClinicopathological data in equids suffering from ante-hepatic, hepatic and post-hepatic diseases
Amory, Hélène ULg; Perron, MF; Sandersen, Charlotte ULg et al

in Proceedings of the 42th Annual Congress of the British Equine Veterinary Association (BEVA) (2003)

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See detailCombining stochastic simulations and inverse modelling for delineation of groundwater well capture zones
Rentier, Céline; Roubens, Marc ULg; Dassargues, Alain ULg

in Iu (Ed.) Computational Methods in Engineering and Science (2003)

In hydrogeology, protection zones of a spring or a pumping well are often delimited by isochrones that are computed using calibrated groundwater flow and transport models. In heterogeneous formations, all ... [more ▼]

In hydrogeology, protection zones of a spring or a pumping well are often delimited by isochrones that are computed using calibrated groundwater flow and transport models. In heterogeneous formations, all direct and indirect data, respectively called hard and soft data, must be used in an optimal way. Approaches involving in situ pumping and tracer tests, combined with geophysical and/or other geological observations, are developed. In a deterministic framework, the calibrated model is considered as the best representation of the reality at the current investigation stage, but result uncertainty remains unquantified. Using stochastic methods, a range of equally likely isochrones can be produced allowing to quantify the influence of our knowledge of the aquifer parameters on protection zone uncertainty. Furthermore, integration of soft data in a conditioned stochastic generation process, possibly associated with an inverse modeling procedure, can reduce the resulting uncertainty. A stochastic methodology for protection zone delineation integrating hydraulic conductivity measurements (hard data), head observations and electrical resistivity data (soft data) is proposed. [less ▲]

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See detailL'iconographie du meurtre de saint Lambert de Liège
George, Philippe ULg

in Bischofsmord im Mittelalter. Murder of Bishops, 22 septembre 2000 (2003)

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See detailIteratively extending time horizon reinforcement learning
Ernst, Damien ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in Machine Learning: ECML 2003, 14th European Conference on Machine Learning (2003)

Reinforcement learning aims to determine an (infinite time horizon) optimal control policy from interaction with a system. It can be solved by approximating the so-called Q-function from a sample of four ... [more ▼]

Reinforcement learning aims to determine an (infinite time horizon) optimal control policy from interaction with a system. It can be solved by approximating the so-called Q-function from a sample of four-tuples (x(t), u(t), r(t), x(t+1)) where x(t) denotes the system state at time t, ut the control action taken, rt the instantaneous reward obtained and x(t+1) the successor state of the system, and by determining the optimal control from the Q-function. Classical reinforcement learning algorithms use an ad hoc version of stochastic approximation which iterates over the Q-function approximations on a four-tuple by four-tuple basis. In this paper, we reformulate this problem as a sequence of batch mode supervised learning problems which in the limit converges to (an approximation of) the Q-function. Each step of this algorithm uses the full sample of four-tuples gathered from interaction with the system and extends by one step the horizon of the optimality criterion. An advantage of this approach is to allow the use of standard batch mode supervised learning algorithms, instead of the incremental versions used up to now. In addition to a theoretical justification the paper provides empirical tests in the context of the "Car on the Hill" control problem based on the use of ensembles of regression trees. The resulting algorithm is in principle able to handle efficiently large scale reinforcement learning problems. [less ▲]

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See detailEmotional Processing in Down Syndrome
Catale, Corinne ULg; Hogge, Michaël; Meulemans, Thierry ULg et al

in Books of Abstracts: 13th conference of the European Society for Cognitive Psychology (2003)

In addition to mental retardation, Down Syndrome (DS) children present emotional deficits. Some authors have suggested that the emotional deficits observed in DS can be related to developmental changes ... [more ▼]

In addition to mental retardation, Down Syndrome (DS) children present emotional deficits. Some authors have suggested that the emotional deficits observed in DS can be related to developmental changes. However, the link between emotion and cognitive processing remains unclear.This study aims to assess the relationships between emotional and cognitive processing in DS children. More specifically, we wanted to assess whether cognitive development could predict emotional deficits. Eighteen children DS and 18 chronological age-matched (CA) children were presented with emotional tasks designed to tap their abilities (i) to label emotion through emotional faces and prosody, (ii) to attribute, from stories, cognitive and emotional states to characters and (iii) to process face identity and gaze behaviour. Cognitive functioning was assessed including attentional treatment, visuo-spatial working memory, receptive language and logical reasoning. The results confirmed that DS performed worse on both cognitive and emotional tasks than CA children. There are also strong correlations between cognitive (including language and logical reasoning measures) and emotional measures. These results suggest that emotional troubles in DS are related to their global cognitive development; they also suggest that the degree of mental retardation can predict the importance of emotional deficits in DS. [less ▲]

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See detailLa filière Porc Fleuri : vers une appellation d'origine protégée
Berti, Fabio ULg; Beduin, Jean-Marie ULg; Verleyen, Vincent ULg et al

in Huitième Carrefour des Productions animales "L'avenir des filières de qualité différenciées" (2003)

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See detailThe Tricolor incident: Pathology, age composition and sex ratio of stranded birds
Jauniaux, Thierry ULg; Masure, S.

in meeting report (2003)

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See detailQuasi 2D-numerical model of aerated flow over stepped chutes
André, Stéphanie; Dewals, Benjamin ULg; Pirotton, Michel ULg et al

in Proc. 30th IAHR Congress (2003)

Aerated flow over stepped chutes is principally studied on laboratory models. Consequently, the obtained design relations have a limited field of application. In order to propose a more general ... [more ▼]

Aerated flow over stepped chutes is principally studied on laboratory models. Consequently, the obtained design relations have a limited field of application. In order to propose a more general description of the flow, a quasi-2D numerical model is developed. The fluid is considered as an air-water mixture governed by the shallow-water equations. Moreover, a transport equation for air concentration represents the self-aeration of the flow and a coefficient of uneven vertical velocity distribution integrates indirectly the turbulent structures. The paper includes a brief description of the flow behaviour, the quasi-2D model equations, and a comparison of the numerical results with the measured flow characteristics in a 30° stepped flume. [less ▲]

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See detailDetails on DARWIN and the Search for Extrasolar Planets
Kaltenegger, L.; Fridlund, M.; Absil, Olivier ULg

in Deming, Drake; Seager, Sara (Eds.) Scientific Frontiers in Research on Extrasolar Planets (2003)

The direct detection of an earth-like planet close to its parent star is challenging because the signal detected from the parent star is between 10[SUB]9[/SUB] and 10[SUB]6[/SUB] times brighter than the ... [more ▼]

The direct detection of an earth-like planet close to its parent star is challenging because the signal detected from the parent star is between 10[SUB]9[/SUB] and 10[SUB]6[/SUB] times brighter than the signal of a planet in the visual and infrared (IR), respectively. Future space based missions like DARWIN and TPF concentrate on the region between 6 and 18 microns, a region that contains the carbon dioxide, water, and ozone spectral features of the atmosphere. Using several small collecting telescopes and a beam combiner allows us to build an instrument with an angular resolution normally associated with monolithic telescopes of much larger diameters. The relative positions of the telescopes, forming the interferometer, are selected such that when the optical signals, collected by the individual telescopes, are coherently combined, the small angular distance between the planet and the star can be resolved. Different configurations of the free flying interferometer array influence the performance of the nulling array. The concepts for space nulling interferometers and the influence of different schemes of beam combination on the detected signal are investigated. The contribution of background noise to the detected signal is examined. [less ▲]

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See detailFattening of young bulls: comparaison of three breeds and two managements
Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg; Istasse, Louis ULg et al

in Book of absracts of the 54th Annual Meeting of the European Association for Animal Production (2003)

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See detailNumerical simulations of tissue ingrowth and differentiation around a loaded titanium implant in a bone chamber
Van Oosterwyck, Hans; Geris, Liesbet ULg; Vander Sloten, Jos et al

in Proceedings of the symposium on integrated systems in dental healthcare (2003)

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See detail2D1/2 thermo-mechanical model of continuous casting using FEM
Pascon, Frédéric ULg; Habraken, Anne ULg

in Brucato, V. (Ed.) Proceedings of the 6th International ESAFORM Conference on Material Forming (2003)

Two complementary approaches of steel continuous casting modelling using the finite element code LAGAMINE have been developed in the M&S Department. The first one (at a macroscopic scale) describes the ... [more ▼]

Two complementary approaches of steel continuous casting modelling using the finite element code LAGAMINE have been developed in the M&S Department. The first one (at a macroscopic scale) describes the whole continuous casting process, from the free surface in the mould and through the entire machine, including thermal and mechanical behaviour of the steel. The second approach focuses on the prediction of cracks and is developed at grain scale. We present in this paper a description of the context in which the study started, the description of the macroscopic approach and some results. [less ▲]

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See detailUn « Front populaire » en Belgique ? L’inexportable exemple français
Lanneau, Catherine ULg

in Les courants politiques et la Résistance : continuités ou ruptures? (2003)

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See detailShort-term effect on plasma and milk selenium and blood glutathion peroxydase oh feeding selenium-enriched haylage to Holstein-Friesian cows
de Behr, V.; Coenen, M.; Cabaraux, Jean-François ULg et al

in Proceedings of 7th Conference of the European Society of Veterinary and Comparative Nutrition (2003)

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See detailGAIA and the spectroscopic binaries: what to expect in terms of orbit determination?
Pourbaix, D.; Jancart, Sylvie ULg

in GAIA Spectroscopy: Science and Technology (2003)

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See detailStochastic modelling of the hydrogeological environment in low permeability sediment
Huysmans, Marijke; Berckmans, Arne; Feyen, Luc et al

in Proceedings of IAMG 2003 (2003)

In Belgium, the Boom Clay is being considered as a potential host formation for the disposal of nuclear waste. Part of the safety assessment and feasibility studies of a potential nuclear waste disposal ... [more ▼]

In Belgium, the Boom Clay is being considered as a potential host formation for the disposal of nuclear waste. Part of the safety assessment and feasibility studies of a potential nuclear waste disposal consists of hydrogeological modeling. In order to model the groundwater flow and possible radionuclide transport in the clay, the spatial distribution of the hydraulic conductivity of the clay has to be assessed. In this study, geostatistical methods are used to characterize the hydraulic conductivity field. More specific, direct sequential simulation of the hydraulic conductivity is carried out, using measurements of hydraulic conductivity and 4 types of soft data or secondary variables: resistivity logs, gamma ray logs, grain size measurements and descriptions of the lithology. The primary and secondary information is analyzed with geostatistical tools and combined to generate 100 fields of the hydraulic conductivity of the Boom Clay. Next, each field is input to a groundwater flow model to predict the advective travel time of constituents released from the disposed waste in the Boom Clay to the aquifers surrounding the Boom Clay. Statistical analysis of the ensemble of model predictions results in a predictive distribution for the advective travel time. This distribution reflects the uncertainty of the advective travel time that results from the uncertainty of the spatial distribution of the hydraulic conductivity of the Boom Clay [less ▲]

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See detailEffect of cooling on the behaviour of a steel beam under fire loading including the end joint response
Simoes da Silva, Luis; Santiago, Aldina; Vila Real, Paulo et al

in Proceedings of the 9th International Conference on Civil and Structural Engineering Computing (2003)

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See detailImpacts of management strategies on nutrient fluxes in a temperate Picea abies (L. Karst) plantation
Carnol, Monique ULg

in Jansen, Jörg; Spiecker, Heinrich; von Teuffel, Konstantin (Eds.) Berichte Freiburger Forstliche Forschung, Heft 47, The question of conversion of coniferous forests, Abstracts, International Conference, 27 Septembre - 02 october, 2003, Freiburg im Breisgau, Germany (2003)

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See detailOptimising a cascade of hydroelectric power stations with the WOLF package
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Brebbia, C. A. (Ed.) Water Ressources Management (2003)

Original free-surface flow solvers have been developed by the HACH during the last years. The resulting fully integrated WOLF package allows engineers to study a very wide range of free surface flows ... [more ▼]

Original free-surface flow solvers have been developed by the HACH during the last years. The resulting fully integrated WOLF package allows engineers to study a very wide range of free surface flows situations. Successful and accurate computations are performed for phenomena as various as hydrological run-offs and dam breaking in quasi 3 dimensions including solid transport effects, as well as rivers networks modelling with explicit exchanges between river paths. All the models, physically based, use efficient and original numerical methods to solve continuous or discontinuous free-surface flow equations. They handle structured or unstructured grids with both first and second order accurate explicit or implicit algorithms in time and space. WOLF also includes powerful user-friendly pre- and post-processing with 2D and 3D animated visualizations as well as a parameters optimization software interconnected with all the package components and based on the innovating method of genetic algorithms. In this paper, the production of the hydroelectric power plants installed on a 60 km long section of the rivers Amblève and Warche in Belgium is presented in details to illustrate the numerical calculation and optimization process. The river network is modeled using real natural topographic data. Hydrological balance is closed and roughness coefficients are calibrated from water level and discharge field measurements. Hydroelectric production is optimized by an automatic calibration of the parameters of the hydrogram injected in the network from the Robertville dam. This approach leads to a substantial gain in both hydroelectric production and financial benefits and deals with all management and security criteria. [less ▲]

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See detailDes principes du développement durable à l'écobilan de l'exploitation agricole
Debouche, Charles ULg

in Fagroud, Mustapha; Debouche, Charles; Debbarh, Abdelhafid (Eds.) et al Equilibre Agriculture-Environnement : Enjeux, outils et perspectives du conseil agricole (2003)

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See detailEvaluation de la présence des Syrphidae en cultures maraîchères et relation avec les populations aphidiennes.
Francis, Frédéric ULg; Colignon, Pierre; Gaspar, Charles et al

in Abstract book (2003)

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See detailSegregation of the bulk blend fertilizers
Miserque, Olivier; Pirard, Eric ULg

in Esbensen, Kim (Ed.) First World Conference on Sampling and Blending (2003)

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See detailPhotometric Mode Identification in the Two Doradus Stars HD 12901 and HD 48501
Aerts, C.; Cuypers, J.; Dupret, Marc-Antoine ULg et al

in Asteroseismology Across the HR Diagram (2003)

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See detailDysregulation of inflammation
Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Hoffman, A.; Robinson, N. E.; Wade, J. F. (Eds.) Proceedings of a Workshop on “Inflammatory Airway Disease: Defining the Syndrome”, Havemeyer Foundation Monograph Series No. 9 (2003)

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See detailConfinement and cut-off: A model for the Pion Quark Distribution Function
Stassart, Pierre ULg; Bissey, F.; Cudell, Jean-René ULg et al

(2003)

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We ... [more ▼]

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We show that the introduction of non-perturbative effects, linked through a cut-off to the size of the pion, allows the reproduction of important features of the pion quark distribution function. [less ▲]

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See detailLes traitements futurs en allergologie chez le cheval
Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Congrès de l'Association Vétérinaire Equine Française (AVEF) (2003)

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See detailDéveloppement de la compétence orale en anglais par l'optimisation des stratégies de communication
Simons, Germain ULg

in Actes du 2e congrès des chercheurs en éducation. L'Ecole, dans quel(s) sens ? (2003)

Cette communication retrace les grandes étapes d'un programme de recherche collaborative, menée entre 2000 et 2002, portant sur l'optimisation de la compétence orale en anglais/langue étrangère dans l ... [more ▼]

Cette communication retrace les grandes étapes d'un programme de recherche collaborative, menée entre 2000 et 2002, portant sur l'optimisation de la compétence orale en anglais/langue étrangère dans l'enseignement secondaire de la Communauté française de Belgique. Après avoir décrit le contexte général de cette recherche-action, nous proposons une définition opérationnelle du concept "stratégie de communication" et précisons les questions de recherche. Puis, nous décrivons le schéma expérimental et mentionnons les principaux résultats obtenus. Enfin, nous concluons avec des perpectives quant à la poursuite de cette recherche, entre autres, l'élaboration d'un outil de formation et de diffusion, qui était en cours d'élaboration au moment où nous avons présenté cette communication. [less ▲]

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See detailRadio continuum observations of massive stars in open cluster NGC 6231 and the Sco OB1 association
Setia Gunawan, Diah Y A; Chapman, Jessica M; Stevens, Ian R et al

in A Massive Star Odyssey: From Main Sequence to Supernova (2003)

We present results of the Australia Telescope Compact Array (ATCA) radio continuum observations of massive stars in the Sco OB1 association. Most stars detected in the program show spectral indices lower ... [more ▼]

We present results of the Australia Telescope Compact Array (ATCA) radio continuum observations of massive stars in the Sco OB1 association. Most stars detected in the program show spectral indices lower than value expected from thermal free-free emission. [less ▲]

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See detailPreliminary results from XMM-Newton observations of the massive Wolf-Rayet binary WR 22 (WN7h+O9III-V)
Gosset, Eric ULg; Rauw, Grégor ULg; Vreux, Jean-Marie ULg et al

in A Massive Star Odyssey: From Main Sequence to Supernova (2003)

We present preliminary results from observations of the massive WR+O binary WR 22 performed with the XMM observatory. The star is brighter in the X-ray domain near apastron and fainter at periastron. The ... [more ▼]

We present preliminary results from observations of the massive WR+O binary WR 22 performed with the XMM observatory. The star is brighter in the X-ray domain near apastron and fainter at periastron. The change in brightness is very progressive and mainly corresponds to a lowering of the soft part of the spectrum. [less ▲]

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See detailEtude rétrospective des causes médicales d’intolérance à l’effort chez 345 chevaux
Ponthier, Jérôme ULg; Van Erck, Emmanuelle; Art, Tatiana ULg et al

in Proceedings du Congrès de l'Association Vétérinaire Equine Française (AVEF) (2003)

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See detailSearch for X-ray Variability in Early-type Stars in the Carina OB1 Association with XMM-Newton
Antokhin, I. I.; Rauw, Grégor ULg; Vreux, Jean-Marie ULg et al

in Astronomical Society of the Pacific Conference Series (2003)

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See detailDiagnosis of TSH secreting pituitary adenomas : A changing scene
Beckers, Albert ULg

in The 85th Annual Meeting of the Endocrine Society - Abstract book (2003)

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See detailGranulometría y Morfometría de Materiales Granulares por Metódos Ópticos
Pirard, Eric ULg

in Avila, Margot; Lucion, Christian (Eds.) Mineria, Metalurgia y Medio Ambiente (2003)

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See detailComplex Hydrogeological Study of the Alluvial Transboundary Aquifer of Szamos/Somes (Romania-Hungary)
Lenart, Laszlo; Madarasz, Tamas; Miko, Lajos et al

in Water resources management in the 21th century. Subtheme 4, Relevance and sustainability of the intensive groundwater developments (2003)

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See detailQu'il est long le chemin vers l'équité...
Lafontaine, Dominique ULg

in L'école, dans quel(s) sens ? Actes du 2e Congrès des chercheurs en éducation, Louvain-la-Neuve, 12-13 mars 2002 (2003)

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See detailL'efficacité au prix de l'hétérogénéité : une approche comparative
Lafontaine, Dominique ULg

in Actes du colloque organisé par le Conseil de l'Education et de la Formation (2003)

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See detailOn the combination of corpus-based and experimental methodologies in the study of causal, contrastive and metadiscourse connectives in L1 and L2 text comprehension and production
Perrez, Julien ULg; Degand, Liesbeth

in Archer, Dawn; Rayson, Paul; Wilson, Andrew (Eds.) et al Proceedings of the Corpus Linguistics 2003 Conference (2003)

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See detailUtilisation de la technique ultrasonique pour prédire des paramètres caractérisant la carcasse et la viande de boeuf
Delobel, A.; Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg et al

in 10èmes Rencontres autour des Recherches sur les Ruminants (2003)

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See detailThe monitoring of the ionospheric activity using GPS measurements
Warnant, René ULg; Stankov, Stanimir; Jodogne, Jean-Claude et al

in Proceedings of the COST271 2002 workshop (2003)

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See detailAnalyse de stabilité linéaire d'un ferrofluide saturant un milieu poreux en rotation
Desaive, Thomas ULg; Hennenberg, M.; Dauby, Pierre ULg

in congrès français de mécanique (2003)

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See detailQuelques réflexions à propos des possibilités d'analyses dendrochronologiques de châteaux de pierre du sud-est de la Belgique
Hoffsummer, Patrick ULg

in Poisson, Jean-Michel; Schwein, Jean-Jacques (Eds.) Le bois dans le château en pierre au Moyen Âge (2003)

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See detailHeat generation and transfer due to friction and plastic dissipation - a coupled thermomechanical approach
Adam, L.; Ponthot, Jean-Philippe ULg

in Proceedings of HEFAT 2003, 2nd International conference on Heat Transfer, Fluid Mechanics and Thermodynamics (2003)

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See detailBauforschung et dendrochronologie
Hoffsummer, Patrick ULg

in De Jonge, Krista; Van Baelen, Koen (Eds.) Preparatory Architectural Investigation in the Restauration of Historical Buildings (2003)

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See detailLong-term effect on plasma, meat and milk selenium and blood glutathion peroxydase of feeding selenium-enriched barley and haylage to Belgian Blue cows, calves and fattened bulls
de Behr, V.; Marche, C.; Coenen, M. et al

in Proceedings of 7th Conference of the European Society of Veterinary and Comparative Nutrition (2003)

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See detailEncurvada lateral de vigas metalicas sujeitas a acçao do fogo: uma nova proposta de calculo simples complementar ao EC3
Vila Real, P.; Lopes, N.; Simoes da Silva, L. et al

in Lamas; Calado; Ferreira (Eds.) et al Proceedings of the Congresso de Construçao Metallica e Mista (2003)

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See detailInsert'Prof : pour un dispositif d'accompagnement des jeunes enseignants favorisant une insertion réussie dans la vie professionnelle
Beckers, Jacqueline ULg; Andrianne, Sabine; Bourguignon, Luc et al

in L'école, dans quel(s) sens ? Actes du 2e congrès des chercheurs en éducation, Louvain-la-Neuve, 12-13 mars 2002 (2003)

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See detailSolid lipid Nanoparticles for drug Pumonary Administration
Sanna, Vanna; Kirschvink, Nathalie; Gustin, Pascal ULg et al

in Proceedings of 30th International Symposium on Controlled Release of Bioactive Materials (2003)

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See detailSeismic performance of ductile steel moment frames designed according to Eurocode 3 and Eurocode 8. First step for Eurocode calibration
Sanchez-Ricart, L.; Plumier, André ULg

in Proceedings of the STESSA 2003 Conference (2003)

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See detailInfluence de la substitution du tourteau de soja par des graines de lupin, avec ou sans complément d'alpha-galactosidase, sur la digestibilité des régimes et la rétention azotée du porc en croissance
Froidmont, Eric; Schoeling, Olivia; Deliège, Françoise et al

in Journées Recherche Porcine (2003)

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See detailEvolution de la consommation de viande bovine en Belgique
Duquesne, Brigitte ULg; Lebailly, Philippe ULg

in 10 èmes Rencontres, Recherche, Ruminants (2003)

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See detailA new formulation of internal forces for non-linear hypoelastic constitutive models verifying conservation laws
Noels, Ludovic ULg; Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg et al

in Bathe, K. J. (Ed.) Second MIT Conference on Fluid and Solid Mechanics (2003)

This paper proposes a new formulation of the internal forces for hypoelastic constitutive models ensuring that the elastic work of deformation can be restored by the scheme. Moreover, we demonstrate that ... [more ▼]

This paper proposes a new formulation of the internal forces for hypoelastic constitutive models ensuring that the elastic work of deformation can be restored by the scheme. Moreover, we demonstrate that the work of the plastic deformation is positive and consistent with the material model. [less ▲]

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See detailExternal quality grading of Jonagold apples using a multi-spectral vision system
Kleynen, Olivier; Leemans, Vincent ULg; Destain, Marie-France ULg

in Balsa-Canto E., Mora J.; Onate E. (Eds.) II International Workshop - Information Technologies and Computing Techniques for the Agro-Food Sector (2003)

This paper presents a method to sort Jonagold apples using a four bands multi-spectral image acquisition device. Multi-spectral images of sound tissue and various defects were acquired. Defects could be ... [more ▼]

This paper presents a method to sort Jonagold apples using a four bands multi-spectral image acquisition device. Multi-spectral images of sound tissue and various defects were acquired. Defects could be divided into four classes: slight defects (e.g. small russet), more serious defects (scar tissue), defects leading to the rejection of the fruit (e.g. rot) and recent bruises (between one hour and two hours old). Image segmentation was based on the Bayes' theorem. Each pixel of the fruit was classified into 'healthy' or 'defect' classes according to the probability distribution of the spectral components of each class. Once segmented, the fruit was graded by linear discriminant analysis on the basis of the relative area of the defect and statistical parameters computed on the spectral components of the two tissues classes. Results (cross validation) showed 94% and 84% if the sound and defective fruits respectively well classified. Most of the misclassified defective fruits (89%) belonged to the slight defect category. [less ▲]

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See detailSelf-Enrichment of Galactic Halo Globular Clusters
Parmentier, G.; Noels-Grötsch, Arlette ULg; Gilmore, G. F. et al

in Piotto (Ed.) New horizons in globular cluster astronomy : proceedings of a conference held at Università di Padova, Padova, Italy, 24-28 June, 2002 (2003)

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See detailNon-adiabatic Pulsational Observables in Scuti and Doradus Stars: a Comparison of Different Numerical Codes
Moya, A.; Garrido, R.; Dupret, Marc-Antoine ULg

in Asteroseismology Across the HR Diagram (2003)

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See detailA high-order, high-frequency method for surface scattering by convex obstacles
Bruno, O.; Geuzaine, Christophe ULg

in Proceedings of the 14th Conference on the Computation of Electromagnetic Fields, COMPUMAG 2003 (2003)

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See detailElectromagnetic waves in periodic structures
Guenneau, S.; Nicolet, A.; Geuzaine, Christophe ULg et al

in Proceedings of the Eleventh International Symposium on Applied Electromagnetics and Mechanics, ISEM 2003 (2003)

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See detailThe Hybrid Scalar and Vector Potential Formulation for Magnetic Field Computations by means of the FE Method
Gyselinck, J.; Vandevelde, L.; Geuzaine, Christophe ULg et al

in Proceedings of the 14th Conference on the Computation of Electromagnetic Fields, COMPUMAG 2003 (2003)

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See detailA stepwise approach for chemical risks assessment at the workplace
Mairiaux, Philippe ULg; Balsat, Alain; Dujardin, Marc ULg et al

in Strasser, H.; Kluth, K.; Rausch, H. (Eds.) et al Quality of work and products in enterprises of the future (2003)

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See detailNumerical - experimental interaction in hydrodynamics: an integrated approach for the optimal management of hydraulic structures and hydrographic basins
Pirotton, Michel ULg; Lejeune, André ULg; Archambeau, Pierre ULg et al

in Lu; Lamas; Li (Eds.) et al Computational Methods in Engineering and Science (2003)

The present paper presents studies and tools devoted to the reduction of uncertain-ties in the scientific knowledge of various unsteady flows, including solid transport effects, in the perspective of ... [more ▼]

The present paper presents studies and tools devoted to the reduction of uncertain-ties in the scientific knowledge of various unsteady flows, including solid transport effects, in the perspective of applications such as restoration, rehabilitation and enhancement of riverbeds, rivers and waterways. This global approach will be tested and fitted in a dynamic and integrated experimental model of reference flows in the laboratory. The relevance of using of physical experimental scale models will be highlighted for the identification of constitutive laws used in numerical modelling. Practical applications prove that the integration of powerful hydrodynamic software for water management is realistic and will lead to compute transient flooding, sedimentation and erosion events in natural compound channels, as well as to design and simulate the behaviour of hydraulic regulation works or locks. It will also help in working out new projects or reconstructions of hydraulic infrastructures, as well as ecological rehabilitations. Even if the sole quantitative plan will be taken into account, this opti-misation project will also lead to highlight favourable solutions, from a qualitative point of view. [less ▲]

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See detailLa dendrochronologie de l'architecture
Hoffsummer, Patrick ULg

in Au-delà de l'écrit: les hommes et leurs vécus matériels au Moyen Âge à la lumière des sciences et des techniques, nouvelles perspectives (2003)

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See detailUtilisation des techniques végétales pour la stabilisation des berges : suivi de chantiers réalisés dans différents types de rivières wallonnes.
Hallot, Eric ULg; Petit, François ULg; Verniers, G. et al

in Evaluer le milieu - Journées des géographes belges (2003)

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See detailQuelle place accorder aux différentes dimensions de la discipline ? Questions et prise de position d’un géomorphologue
Petit, François ULg

in Quelle géographie enseigner demain à l'Université ? (2003)

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See detailBanana-Mycosphaerella fijiensis interactions.
Lepoivre, Philippe ULg; Busogoro, Jean-Pierre; Etame, Jean-Jacques et al

in Mycosphaerella leaf spot diseases of bananas: presentstatus and outlook. Proceedings of the 2nd International Workshop on Mycosphaerella leaf spot diseases held in San Jose, Costa Rica on20-23 May 2002 (2003)

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See detailSavoirs, compétences disciplinaires, compétences transversales : évolution ou révolution ?
Crahay, Marcel ULg

in L'école, dans quel(s) sens ? Actes du 2e congrès des chercheurs en éducation, Louvain, mars 2002 (2003)

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See detailRecognition of Quality and Conformity of Concrete Repair Products and Protection Systems/ Belgian and European experiences
Courard, Luc ULg; Darimont, Anne ULg; Degeimbre, Robert ULg et al

in Vaysburd, Alex (Ed.) Bridging the Concrete Repair Industry into a New Era of Sustainable Development (2003)

Recognition of product quality and conformity supposes the existence of two elements: a users’ requirements document and a certification system for product conformity with this document. The document is ... [more ▼]

Recognition of product quality and conformity supposes the existence of two elements: a users’ requirements document and a certification system for product conformity with this document. The document is generally drawn up by a group representing all the interested parties (public and private users, producers, certification or monitoring bodies, testing laboratories, experts …). Depending on circumstances, the document appears as the norm approved in a certain country or as a normative document (approval guide, technical prescriptions,…) recognised by the various interested parties. The certification body is a public or private body which has the competence, independence and impartiality to certify that a duly identified product conforms to a normative document. The certification body works within a certification system that also includes inspection bodies and testing laboratories. In certain cases, the certification body is approved by a competent national authority. In Belgium, the Ministry of Communication and Infrastructures approves certification or inspection bodies and also testing laboratories for building activities. [less ▲]

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See detailUnimolecular Dissociation of Halogenobenzene Cations by Phase space Theory.
Gridelet, E.; Lorquet, Jean-Claude ULg; Locht, Robert ULg et al

in Anton, J.; Cedrequist, H.; Larsson, M. (Eds.) et al 23rd International Conference on Photonic, Electronic and Atomic Collisions: Book of Abstracts. (2003)

The Orbiting Transition State version of the Phase Space Theory (PST) is used to calculate the KER distributions in the dissociation channel of X (X=I,Cl,Br)-loss from C6H5X+. The results are compared to ... [more ▼]

The Orbiting Transition State version of the Phase Space Theory (PST) is used to calculate the KER distributions in the dissociation channel of X (X=I,Cl,Br)-loss from C6H5X+. The results are compared to the experimental distribution and to that obtained by PST. [less ▲]

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See detailEffet d’un complément antioxydant sur les marqueurs sanguins du stress oxydant chez des galopeurs entraînés
De Moffarts, Brieuc; Kirschvink, N.; Art, Tatiana ULg et al

in Congrès de l'Association Vétérinaire Equine Française (AVEF) (2003)

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See detailEstimation in censored linear regression via preliminary smoothing
Heuchenne, Cédric ULg; Van Keilegom, Ingrid

in Bulletin of the International Statistical Institute, 54th Session (2003)

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See detailNumerical shear tests for different elasto-plastic laws
de Montleau, P.; Duchene, Laurent ULg; Flores, Paulo et al

in Onate, E.; Owen, D. R. J. (Eds.) Proceedings of the VII International Conference on Computational Plasticity (COMPLAS 2003) (2003)

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu ... [more ▼]

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu's model. These laws take into account respectively isotropic, kinematic and mixed isotropic-kinematic hardening. The goal of the paper is to provide a first numerical idea of the stress-strain path in the center of an experimental test sample. [less ▲]

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See detailSurface charge studies - an important approach for investigation of color removal from textile wastewaters by chemical coagulation
Gaydardzhiev, Stoyan ULg; Ay, P.

in Rao; Misra (Eds.) MPT 2004 Conference Proceedings (2003)

Results concerning surface charge characterizations of coagulated dye with an aim to evaluate the predominant destabilization mechanism taking place during colour removal by chemical coagulation are ... [more ▼]

Results concerning surface charge characterizations of coagulated dye with an aim to evaluate the predominant destabilization mechanism taking place during colour removal by chemical coagulation are presented. A model wastewater comprising of commercially used dye with a CI “Reactive Red 2” was studied. The effect of the combination coagulant/flocculant on colour removal by filtration and sedimentation was evaluated in terms of progression of sludge surface charge. On that basis, an implications about the predominant colour removal mechanisms have been drawn. On selected sludge samples, floc characterisations in terms of size by laser scattering and shape were performed. The measurement techniques used have encompassed for particle size and Small Angle Light Scattering (SALS) for fractal dimension. [less ▲]

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See detailClinching joining system: validation of numerical models
Pietrapertosa, C.; Zhang, Lihong ULg; Habraken, Anne ULg et al

in Brucato, V. (Ed.) Proceedings of the 6th International ESAFORM Conference on Material Forming (2003)

The clinching process, also known as “press joining”, is a mechanical joining technique for sheet metal. Its basic principle is to clamp together several metal sheets by an impact extrusion between a ... [more ▼]

The clinching process, also known as “press joining”, is a mechanical joining technique for sheet metal. Its basic principle is to clamp together several metal sheets by an impact extrusion between a punch and a die. The joint is formed by a localized cold plastic deformation. Forming is used as a joining method. Within the context of this research, University of Liège is developing numerical models, with the FEM code LAGAMINE, that simulate the clinching process. On the other hand, shear tests on simple joints with one or two clinches were realized and their behaviour is reproduced numerically with LAGAMINE. This work opens the way to the analytical formulation of the behaviour of clinched joints. The article will focus on comparisons between experiments and numerical simulations. First, the identification of model parameters will be explained. Then, the predicted failure modes will be analysed by comparison with the xperiments. [less ▲]

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