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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 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 detailObservations sur la tradition manuscrite du théâtre religieux médiéval en langue d'oc
Henrard, Nadine ULg

in Castano, Rossana; Guida, Saverio; Latella, Fortunata (Eds.) Scène, évolution, sort de la langue et de la littérature d’oc : Actes du VIIe Congrès de l’Association internationale d’études occitanes (A.I.É.O.), Reggio Calabria et Messine 7-13 juillet 2002, 2 vol. (2003)

Typologie des mss qui conservent le répertoire dramatique occitan, établie en se fondant sur la spécificité d’un genre par nature lié à une performance. Dans le cas du théâtre, les données codicologiques ... [more ▼]

Typologie des mss qui conservent le répertoire dramatique occitan, établie en se fondant sur la spécificité d’un genre par nature lié à une performance. Dans le cas du théâtre, les données codicologiques (qualité des supports, ajouts marginaux, ratures, présence de notation musicale, de didascalies rubriquées…) sont à considérer en tenant compte de la fonction pratique des mss et du rapport des textes à la scène. L’enquête codicologique éclaire donc l’activité dramatique dans son ensemble (de l’écriture des textes à la conception du spectacle), et ses résultats s’insèrent dans une réflexion plus générale sur le statut littéraire du texte de théâtre occitan au Moyen Âge. Cet article s’inscrit dans l’esprit des recherches menées par G.A. Runnalls sur les mss du théâtre du Nord.] [less ▲]

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See detailT cell subsets in the respiratory tract of dogs without respiratory disease : preliminary results.
Peeters, Dominique ULg; Day, M. J.; Moore, P. et al

in Proceedings of the 13th Annual Congress of the ECVIM-CA (2003)

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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 detailLa connaissance partielle chez l'apprenant : pourquoi et comment la mesurer ?
Leclercq, Dieudonné ULg; Poumay, Marianne ULg

in L’évaluation de l’éducation thérapeutique du patient (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 detailMode Identification and Seismic Modelling of the Cep Star EN(16)Lac
Aerts, C.; Lehmann, H.; Scuflaire, Richard ULg et al

in Asteroseismology Across the HR Diagram (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 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 detailEffets fonctionnels respiratoires induits par l’inhalation du glycopyrrolate chez le cheval poussif en crise.
Art, Tatiana ULg; de Moffarts; Van Erck, Emmanuelle ULg et al

in Congrès de l'Association Vétérinaire Equine Française (AVEF) (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 detailUpdating the Jungfraujoch FTIR databases : current status
Duchatelet, Pierre ULg; Mahieu, Emmanuel ULg; Zander, Rodolphe ULg et al

(2003)

Since the middle of the 20th century, the University of Liège has been active at the International Scientific Station of the Jungfraujoch (ISSJ) in the Swiss Alps (46.5°N, 8.0°E, 3580m asl) to study the ... [more ▼]

Since the middle of the 20th century, the University of Liège has been active at the International Scientific Station of the Jungfraujoch (ISSJ) in the Swiss Alps (46.5°N, 8.0°E, 3580m asl) to study the chemical composition of both the solar photosphere and the Earth’s atmosphere. Since 1989, the ISSJ is an accepted site of the northern midlattitude primary Alpine station of the NDSC (Network for the Detection of Stratospheric Change). This acceptance resulted from earlier monitoring activities by Ulg of a large number of atmospheric constituents. Within the NDSC frame, a special attention and many efforts have been devoted to the monitoring of the most important atmospheric constituents involved both in the erosion of stratospheric ozone and in the greenhouse capacity of the troposphere, after it became clear that human activities have a direct impact on these two processes. Using two high resolution Fourier transform infrared (FTIR) spectrometers, over 25000 wide-band solar spectra encompassing nearly 1700 days since the mid 1980s have been recorded and analyzed to study, quasi simultaneously and repeatedly, local, seasonal and secular variations of some 20 gaseous telluric species. So far, most results have been reported, demonstrating the power of infrared spectrometric solar observations to characterize the chemical composition of the atmosphere. These datas, archived in terms of total vertical column abundances (e.g., at the NDSC-Data Host Facility; http://www.ndsc.ws), are expressed in number molecules per cm2 above the site using best-know input parameters (i.e. spectroscopic-, instrumental-, environmental-) in the retrieval procedure. Meanwhile, more sophisticated algorithms, based on the “Rodgers” optimal estimation method, have been developed, allowing to derive partial tropospheric- and stratospheric columns for various species, including HCl, ClONO2, O3, HF, CO, N2O, CH4, HCN, OCS. This contribution reports related results for HCl and ClONO2. [less ▲]

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See detailModeling Stationary and Evolving Discontinuities with Finite Elements
Moës, Nicolas; Béchet, Eric ULg

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

A methodology for treating non-planar three-dimensional cracks with geometries that are independent of the mesh is summarized. The method is based on the extended finite element method, in which the crack ... [more ▼]

A methodology for treating non-planar three-dimensional cracks with geometries that are independent of the mesh is summarized. The method is based on the extended finite element method, in which the crack discontinuity is introduced as a Heaviside step function via a partition of unity. In addition, branch functions are introduced for all elements containing the crack front. The crack geometry is described by two signed distance functions (level sets), which in turn can be defined by nodal values. Consequently, no explicit representation of the crack is needed. A Hamilton-Jacobi equation is used to update the level sets as the crack grows. Numerical experiments show the robustness of the method in treating cracks with significant changes in topology. The method is readily extendable to inelastic fracture problems. [less ▲]

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See detailSaintes femmes en terre liégeoise. Lecture de biographies spirituelles inédites des 17e et 18e s.
Henneau, Marie-Elisabeth ULg

in Van Lieburg, Fred; Wingens, Marc; Beyer, Jürgen (Eds.) et al Confessional Sanctity (c. 1500- c. 1800) (2003)

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

in Proceedings of the STESSA 2003 Conference (2003)

The paper discusses the components of reduction factor to be accounted for design purposes. A parametric study of moment resisting steel frames (MRSF) designed according Eurocode 3 (EC3) and Eurocode 8 ... [more ▼]

The paper discusses the components of reduction factor to be accounted for design purposes. A parametric study of moment resisting steel frames (MRSF) designed according Eurocode 3 (EC3) and Eurocode 8 (EC8) is performed. The structural supply of the designed structures exceeds largely the seismic demand in spite of the fact that Ultimate Limit State (ULS) verification of EC8 for MRSF is not conservative. The structural performance is poorly correlated with ULS verification of EC8 but with others code restrains and with parameters like base shear ratio or fundamental period. The practice that deduces the values of reduction factor on the observation of structural performance under past earthquake is not rationally based. This practice tends to make useless the ULS verification for structural systems like MRSF, in which structural performance is poorly correlated with the ULS verification. This practice is responsible of the unsafe values of reduction factors assigned in the seismic codes. [less ▲]

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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 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 detailCellulose enzymatic availability in Municipal solid waste
Rodriguez, C.; Hiligsmann, Serge ULg; Ongena, MARC ULg et al

in Christensen; Cossu; Stegmann (Eds.) Proceedings Sardinia 03, Ninth International Waste Management and Landfill Symposium (2003)

We recently developed a new and rapid method to evaluate the biological reactivity of cellulose in Municipal Solid Waste (MSW). This test is based on the enzymatic hydrolysis of cellulose in MSW and can ... [more ▼]

We recently developed a new and rapid method to evaluate the biological reactivity of cellulose in Municipal Solid Waste (MSW). This test is based on the enzymatic hydrolysis of cellulose in MSW and can be related to the digestibility of this polymer in MSW. In this work, we showed that the enzymatic cellulose degradation test (ECD) correlated well with a Biochemical Methane Potential (BMP) assay so that the ECD test can be reliably applied to estimate cellulose bioavailability in various waste samples. These tests have also been used to evaluate the influence of some important parameters that could affect the extent and the rate of cellulose degradation in waste. It appeared that cellulose enzymatic hydrolysis is related to the moisture content but no clear relationship could be established with the cellulose content. Moreover, it is shown that acetic acid produced by the anaerobic degradation of organic matter, and responsible for high COD in young leachates, may slow down or inhibit the enzymatic hydrolysis step and the methanogenesis. [less ▲]

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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)

Detailed reference viewed: 107 (8 ULg)
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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 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 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 detailConclusions fictives. Comment peut-on être francophone?
Demoulin, Laurent ULg

in Bertrand, Jean-Pierre; Gauvin, Lise (Eds.) Littérature mineures en langue majeure: Québec/Wallonie-Bruxelles (2003)

Comparaison de l'attitude critique des spécialistes de la littérature belge et des spécialistes de la littérature québécoise.

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See detailSimulations numériques d'essais de cisaillement simple
Flores, Paulo; De Montleau, P.; Habraken, Anne ULg et al

in 16ème Congrès fançais de Mécanique (2003)

Several tests have been designed in order to identify the initial yield locus and the parameters required in hardening laws. Taking into account the work done by Piljman (2001), M&S laboratory has started ... [more ▼]

Several tests have been designed in order to identify the initial yield locus and the parameters required in hardening laws. Taking into account the work done by Piljman (2001), M&S laboratory has started the construction of a bi-axial machien able to perform plane strain test, shear test (monotonic or cyclic), and a simultaneous combination of both. This article presents the simulation of a cyclic simple shear test using three types of hardening. [less ▲]

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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 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 detailAdvances in computing strategies for the solution of huge mixed model equations
Ducrocq, V.; Druet, Tom ULg

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

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See detailVision d'acteurs : le Conseil supérieur wallon des forêts et de la filière bois
Rondeux, Jacques ULg

in Actes du colloque "Le droit international dans le domaine de l'environnement. Quelles implications pour la région wallonne ?" (2003)

9 organes consultatifs wallons concernés par les matières environnementales ont décidé de mettre sur pied une journée de réflexion sur le droit international dans le domaine de l'environnement. L'objectif ... [more ▼]

9 organes consultatifs wallons concernés par les matières environnementales ont décidé de mettre sur pied une journée de réflexion sur le droit international dans le domaine de l'environnement. L'objectif est de donner une vision d'ensemble du droit international existant et en projet dans ce domaine et d'en cerner les implications pour la Région wallonne. [less ▲]

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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 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 detailVLT Observations of two Unusual BAL Quasars
Hall, Patrick; Hutsemekers, Damien ULg

in Active Galactic Nuclei: From Central Engine to Host Galaxy. ASPC 290 (2003)

The SDSS has confirmed the existence of populations of broad absorption line quasars with extreme properties. I will discuss the discovery of redshifted absorption troughs (confirmation of a rotating disk ... [more ▼]

The SDSS has confirmed the existence of populations of broad absorption line quasars with extreme properties. I will discuss the discovery of redshifted absorption troughs (confirmation of a rotating disk wind?), absorption from FeIII but not FeII (a very large column density of moderately ionized gas?), extremely reddened objects (extinction curves even steeper than that of the SMC), objects with overlapping troughs that remove 90% of the flux below MgII, and two mysterious objects which may or may not be unusual BALs. Implications of these objects for quasar and BAL outflow models will be discussed, along with preliminary results of various followup observations. [less ▲]

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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 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 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 detailThe novel somatostatin analog SOM230 has a broad spectrum of inhibitory action on hormone release by human somatotroph, corticotroph and PRL-secreting pituitary adenomas in vitro
Hofland, L. J.; Van Der Hoek, J.; Van Koetsveld, P. M. et al

in The 85th Annual Meeting of the Endocrine Society - Abstract book (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 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 detailStudy of the behaviour of welded joints between elliptical hollow sections
Pietrapertosa, C.; Jaspart, Jean-Pierre ULg

in Proceedings of the 10th International Symposium on Tubular Structures (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 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 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 detailFaire mentir les prédictions en 1ère candidature : comment ? Avec quel résultat ? L'opération RESSAC (Résultats d'Epreuves Standardisées au Service de l'Apprentissage en Candis)
Leclercq, Dieudonné ULg; Dupont, Chantal ULg; Detroz, Pascal ULg 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 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 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 detailUrban use of VHR images on Bukavu (Democratic Republic of Congo)
Binard, Marc ULg; De Man, J.; Séba, G. et al

in Proceedings of the Second Workshop of the EARSeL Special Interest Group on Remote Sensing for Developing Countries, Bonn, Germany September 18-20, 2002. EARSeL: Paris, France. (2003)

The main purpose of this study was to show potential uses of very high resolution (VHR) image in an urban analysis of Bukavu in the Democratic Republic of Congo. As for many of the Third-World cities ... [more ▼]

The main purpose of this study was to show potential uses of very high resolution (VHR) image in an urban analysis of Bukavu in the Democratic Republic of Congo. As for many of the Third-World cities, Bukavu grew up during the last decades and available topographical information on Bukavu dates back to the middle of the twentieth century. This lack of updated information can be compensated by an appropriate use of VHR images. In this study, IKONOS image recorded on the 14th February 2001 was used. Image registration are highly dependant on accurate Digital Elevation Models (DEM), these last ones are also useful in urban analyses. The range between the minimum and maximum altitudes observed in the image was more than 500 meters. Furthermore, the viewing inclination angle is more than 28 degrees. In this case, orthorectification is mandatory for correcting relief displacements. Nevertheless, the lack of good Ground Control Points (GPS’s) on the old topographic maps and the failure to collect field verification data in Bukavu explains the remaining global 2D RMSE of 10 meters. For easier image interpretation, multispectral (4m) and panchromatic (1m) images were fused together by means of the LMVM algorithm. Depending on the object, the Computer Aided Photo Interpretation (CAPI) uses or does not use the near infrared information (true or false colour composite). For a more detailed interpretation about the city morphology we draped the 1m multispectral fused image over the 1m resolution DEM grid. The Built-up Area Index (BAI) computed on the urban mask obtained by CAPI and classification of the vegetation, was compared with the 1954 situation interpreted from topographic maps. The present city shows higher BAI values and in the same time the centre of the city has clearly shifted southward. Statistical analyses are also done on built-up versus slope data. The lack of good GCP’s and the use of DEM produced inaccurate orthorectification which was not adequate for topographical features extraction. Nevertheless the present extensions of Bukavu built-up areas are more than the double of those observed at the beginning of the last half century. New constructions are located on steeper slopes where landslides are frequents. More features could be extracted from the Ikonos image if good GPS measurements were made and if verification by the city authorities was possible. Some practical applications of this study could involve determining better location of new Bukavu extensions. [less ▲]

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See detailEfficient algorithmic approach for mixed lubrication in cold rolling
STEPHANY, A.; Ponthot, Jean-Philippe ULg; COLLETTE, C. et al

in Proceedings of AMPT 2003, Advances in Materials and Processing Technologies (2003)

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See detailFormasup : un 3e cycle en pédagogie universitaire qui met en oeuvre sept clés méthodologiques au service du déploiement de pratiques de qualité en EAD
Poumay, Marianne ULg

in L'université au service de l'apprentissage : A quelles conditions ? (2003)

L'article présente le curriculum "Formasup" (Master Complémentaire depuis 2007) et les sept principes méthodologiques qui présidaient à son organisation en 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 detailAppui au développement rural multisectoriel au Laos
Lebailly, Philippe ULg

in Premières rencontres internationales de la CUD "Construire ensemble le Savoir Universitaire pour le Développement" (2003)

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See detailNumerical simulation of Springback using enhanced assumed strain elements
BUI, Q. V.; Papeleux, Luc ULg; Ponthot, Jean-Philippe ULg

in Proceedings of AMPT 2003, Advances in Materials and Processing Technologies (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 detailCaracterization del comportamiento mecanico de aceros para embuticion profunda
GARCIA, C.; CELENTANO, D.; Ponthot, Jean-Philippe ULg

in Proceedings of the joint conference Jornadas SAM, el Congreso Nacional de Metalurgia y Materiales de Chile (2003)

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See detailOptimization methods for parameter identification of constitutive models in finite viscoplasticity and damage
Stainier, Laurent ULg; KLEINERMANN, J.-P.; Ponthot, Jean-Philippe ULg

in Proceedings of PLASTICITY 2003 (2003)

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See detailLe japonisme en Belgique à la fin du XIXe siècle. Le cas d’Armand Rassenfosse
Bawin, Julie ULg

in 6e congrès de l’Association des cercles francophones d’histoire et d’archéologie de Belgique, LIIIe congrès de la fédération des cercles d’archéologie et d’histoire de Belgique (2003)

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See detailComparaison of three supplements high in linseeds or linseed oil in dairy cows
Cabaraux, Jean-François ULg; Marche, C.; Hornick, Jean-Luc 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 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 detailElevated atmospheric CO2 influences ammonia oxidiser community structure and net nitrification
Carnol, Monique ULg; Malchair, Sandrine ULg

in International Symposium: Structure and Function of Soil Microbiota, Philipps-University Marburg, Germany, September 18-20, 2003 (2003)

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See detailFormer des étudiants de première candidature universitaire à des compétences transversales : lesquelles et comment ?
Leclercq, Dieudonné 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 detailCoupling EIA and SEA of large urban infrastructures: the Liege-Guillemins case study
Cremasco, Veronica; Ruelle, Christine ULg; Teller, Jacques ULg

in Proc. of COST C8 final conference, Sustainable Urban Infrastructure, approaches – solutions – networking (2003)

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See detailRapport de l'atelier sur le thème 'Les technologies de l'information et de la communication dans l'enseignement : pour quoi faire ?'
Leclercq, Dieudonné 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 detailInclusions and Carbides characterisation in High-Speed Steels
Tchuindjang, Jérôme Tchoufack ULg; Lecomte-Beckers, Jacqueline ULg

in Proceedings de la journée de la société belge de microscopie (SBM-BVM), RUCA, UA (2003)

Prior to assessment of inclusions and carbides is the identification of thes particles. The present survey shows how we determine the nature of inclusions and carbides, while using Scanning Electron ... [more ▼]

Prior to assessment of inclusions and carbides is the identification of thes particles. The present survey shows how we determine the nature of inclusions and carbides, while using Scanning Electron Microscopy and Energy Dispersive Spectroscopy with X-Rays. [less ▲]

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See detailParameter identification for inverse problems in metal forming simulation
KLEINERMANN, J. P.; Ponthot, Jean-Philippe ULg; Hogge, Michel ULg

in Proceedings of FIELD ANALYSIS FOR DETERMINATION OF MATERIAL PARAMETERS. EXPERIMENTAL AND NUMERICAL ASPECTS (2003)

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See detailMise en place d’une Sélection Assistée par Marqueurs dans les trois principales races bovines laitières françaises
Fritz, S.; Colleau, J. J.; Druet, Tom ULg et al

in Renc. Rech. Ruminants, 2003, 10 (2003)

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See detailEtude des modifications environnementales à partir des données pluviométriques et NDVI de NOAA-AVHRR en Afrique de l’Ouest
Hountondji, Yvon ULg; Ozer, Pierre ULg; Tychon, Bernard ULg

in Schmitz, Serge; Meert, Henk (Eds.) Les Journées des Géographes Belges: Evaluer la capacité du milieu (2003)

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference ... [more ▼]

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference Vegetation Index (NDVI), calculated from satellite imagery, is a reliable index of the vegetation status as the vegetation response to rainfall is very strong in semiarid environments. This article presents the NDVI and rainfall evolution from 1981 to 1999 in nine locations along a north-south transect from north-western Niger to north-eastern Benin. These two parameters are then statistically analysed to identify breaks in the trends within the datasets. Over the 19 years analysed, it appears that five out of the nine locations have recorded a significant increase of rainfall, while only two presented a significant increase in NDVI. This dichotomy in observed trends may highlight the on-going slow processes of environmental degradation. [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 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 detailIdentification de la place des chercheurs et des praticiens dans la recherche sur l’intervention dans les APS
Cloes, Marc ULg

in Cloes, Marc (Ed.) L’intervention dans les Activités physiques et sportives : rétro/perspectives (2003)

La recherche sur l'Intervention dans les Activités Physiques et Sportives (APS) est a donné une place privilégiée aux chercheurs dans le sens où ces derniers ont guidé majoritairement les choix des thèmes ... [more ▼]

La recherche sur l'Intervention dans les Activités Physiques et Sportives (APS) est a donné une place privilégiée aux chercheurs dans le sens où ces derniers ont guidé majoritairement les choix des thèmes de recherche et laissé aux sujets un rôle secondaire. L'évolution actuelle met clairement en évidence le besoin de les impliquer davantage. En se basant sur une analyse de la littérature spécifique au domaine des APS, ce texte tente ainsi de faire ressortir l'intérêt des recherche-action. [less ▲]

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See detailInvestigation of the Biological Activity and the Environmental Impact of Tunisian MSW Landfills
Mhiri, F.; Marouani, L.; Benzarti, A. et al

in Christensen; Cossu; Stegmann (Eds.) Proceedings Sardinia 03, Ninth International Waste Management and Landfill Symposium (2003)

This paper presents the results of the investigation of the biological activity that takes place in three municipal solid waste landfills (MSW landfills) situated in different regions of two dry climate ... [more ▼]

This paper presents the results of the investigation of the biological activity that takes place in three municipal solid waste landfills (MSW landfills) situated in different regions of two dry climate in Tunisia. Since the climatic water balance is negative (potential evapotranspiration being 1.5 to 5 times higher than rainfall), it has often been considered that this kind of landfill has neither environmental impact nor efficient biological activity. However, the three landfills revealed a biological activity with biogas often containing more than 60 percent of methane. Indeed, the upper waste layer that was effectively dry (dry weight from 85 to 98%), the core of refuse contained between 35 and 65% of dry matter. In some boreholes, the produced gases periodically expelled leachates like small geysers. Therefore, the results assess that landfill management in countries with dry climate should be considered with adapted technologies, not necessary the same as under temperate or humid climates. [less ▲]

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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 detailNumerical investigation of photonic crystal fibers by spectral and multipole methods
Nicolet, A.; Guenneau, S.; Zolla, F. et al

in Asymptotics, Singularities and Homogenisation in Problems of Mechanics, Proceedings of the IUTAM Symposium (Liverpool, July 2002) (2003)

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See detailEvaluer des compétences en histoire : oui mais comment ?
Jadoulle, Jean-Louis ULg

in Beckers, Jacqueline (Ed.) Les outils d’évaluation des compétences disciplinaires dans l’enseignement secondaire. Actes de l’Université d’été (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 detailOndelettes et télédétection.
Charles, Catherine ULg

in Actes des XXXVèmes Journées de Statistiques (2003)

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See detailAcquis des élèves à 15 ans et parcours de formation
Lafontaine, Dominique ULg; Demeuse, Marc

in Capital humain et marchés du travail : perspectives régionales et européennes Enseignement et formation - marché du travail : quelles articulations ? (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 detailL'évaluation en apprentissage à distance : quelle diversité et quelle valeur ajoutée... pour quelle régulation? Illustrations au travers de cours existants
Poumay, Marianne ULg; Georges, François ULg

in Evaluation: entre efficacité et équité (2003)

Le présent article illustre la valeur ajoutée de l'évaluation en ligne ou à distance, au travers d'exemples concrets, distinguant plusieurs méthodes d'évaluation des étudiants et soulignant certains de ... [more ▼]

Le présent article illustre la valeur ajoutée de l'évaluation en ligne ou à distance, au travers d'exemples concrets, distinguant plusieurs méthodes d'évaluation des étudiants et soulignant certains de leurs avantages. Il aborde ensuite le problème du suivi des traces permettant d'améliorer les cours existants : quelles traces conserver, quelle visibilité, notamment sur les résultats du testing en ligne... avec quelles précautions et pour quels usages? [less ▲]

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See detailMale hypogonadism caused by insolated LH deficiency : From pathology to gene, from gene to physiology
Valdes Socin, Hernan Gonzalo ULg; Salvi, R.; Pralong, F. et al

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

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See detailInfluence of social and non-social environmental enrichment on the behaviour of caged rabbits.
Vandenheede, Marc ULg; Halloy, D.

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

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See detailFeeding behaviour of weaned pigs fed either pellets or meal: effects of the number of aniamls 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 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 detailSeismically triggered landslides: a conceptual model for deformation mechanisms and influencing factors
Havenith, Hans-Balder ULg

in EGS-AGU-EUG Joint Assembly (2003)

Abstract: Different types of landslides known or assumed to have been triggered by a specific earthquake were investigated at different places in the Tien Shan (Central Asia). Geophysical and geological ... [more ▼]

Abstract: Different types of landslides known or assumed to have been triggered by a specific earthquake were investigated at different places in the Tien Shan (Central Asia). Geophysical and geological data recorded at these sites allowed us to determine the geometry of the mass movements and environmental features that had contributed to the failure. From the observations and related numerical analyses, it could be inferred that four site factors have a significant influence upon sliding processes: morphology; type of ... [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 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)

Detailed reference viewed: 64 (7 ULg)