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See detailNumerical Methods for the Lubricated Contact Between Solids in Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in ECCM’99, European Conference on Computational Mechanics (1999, August)

In this paper, the lubrication problem in numerical simulation of forming processes is presented. In the case of the rolling process, the recent and complex model of Marsault for the solution of the mixed ... [more ▼]

In this paper, the lubrication problem in numerical simulation of forming processes is presented. In the case of the rolling process, the recent and complex model of Marsault for the solution of the mixed lubrication regime has been implemented and tested. This model needs the use of the finite difference method to work properly. We will discuss the advantages and the difficulties encountered when trying to solve the same problem with the finite element method in a general frame. Finally, a finite element formulation for the solution of the time dependant Reynolds’ equation coupled with the deformation of the workpiece is proposed. [less ▲]

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See detailA Symmetric Tangent Operator Recovery via Quasi-Coulomb Model for Frictional Contact Between Solids in Large Deformation Analysis
Garcìa Garino, Carlos; Ponthot, Jean-Philippe ULg; Boman, Romain ULg et al

in ECCM’99, European Conference on Computational Mechanics (1999, August)

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in ... [more ▼]

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in order to describe the constitutive law for the frictional case. Following a standard plasticity approach to Coulomb law a non-symmetric tangent operator is found, and so a non-symmetric solver has to be used in order to take full advantage of consistent operators. With respect to symmetric ones, these non-symmetric operators lead to prohibitive computational times. However, in practice different schemes have been proposed in order to recover the symmetric operator, and consequently, use a symmetric solver. In this work an alternative approach based on an idea due to Garcia Garino and Oliver [33] is defined in order to avoid to deal with non-symmetric solvers and thus save a large amount of computational time, which renders the computational simulation more attractive to industry. Applications to metal forming simulations and crashworthiness analysis are envisaged. [less ▲]

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See detailInulin incorporation in the pig diet as alternative to growth promoters : effect on specific systemic immunity ?
Rossi, Florence; Cox, E.; Goddeeris, B. et al

in EMBO Workshop on Molecular medicine of the gut, (1999, August)

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See detailRelationship between physical findings, rhinoscopy and computed tomography in nasal aspergillosis
Zonderland, J. L.; Saunders, J. H.; Clercx, Cécile ULg et al

in 6ème Congrès annuel de l'European Association of Veterinary Diagnostic Imaging - Vienne - Autriche - Juillet 1999 (1999, July)

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See detailInvestigation of fuel oil flames by means of Emission Spectroscopy
Ngendakumana, Philippe ULg

in 5th International Conference on Technologies and Combustion for a Clean Environment (1999, July)

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See detailA Measuring Device to Determine the Displacements of Buildings of Large Size
Latteur, Pierre ULg; Sine, Bernard

(1999, July)

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See detailEtude du rôle présomptif des souches atypiques du virus de la myxomatose dans l’étiologie des lésions du système respiratoire chez le lapin
Marlier, Didier ULg; Linden, Annick ULg; Mainil, Jacques ULg et al

in Proceedings of the 8èmes Journées de la Recherche Cunicole (1999, June 09)

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See detailNumerical simulation of shock-absorber devices for crashworthiness : explicit vs implicit formulation
Ponthot, Jean-Philippe ULg; Graillet, D.

in 32nd ISATA, International Symposium on Automotive Technology and Automation, special session on Automotive Crashworthiness, paper 99 SF004 (1999, June)

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See detailDetermination of optimal load shedding against voltage instability
Moors, Cédric; Van Cutsem, Thierry ULg

in Proc. 13th Power System Computation Conference (PSCC) (1999, June)

Detailed reference viewed: 39 (5 ULg)
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See detailIsokinetic evaluation of ACL reconstruction. Surgical procedure influence and rehabilitation implications
Croisier, Jean-Louis ULg; Huskin, Jean-Pierre ULg; Crielaard, Jean-Michel ULg

in Abstract book of the 9th Transactions of the European Orthopaedic Research Society (1999, June)

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See detailUtilisation élémentaire d'un réseau de capteurs "SnO2" pour la reconnaissance d'odeurs environnementales
Nicolas, Jacques ULg; Romain, Anne-Claude ULg; Wiertz, Véronique et al

(1999, June)

Pouvoir identifier les mauvaises odeurs et les suivre en continu directement sur le terrain constituerait sans conteste un atout non négligeable pour un bon nombre d'études environnementales. Sur le ... [more ▼]

Pouvoir identifier les mauvaises odeurs et les suivre en continu directement sur le terrain constituerait sans conteste un atout non négligeable pour un bon nombre d'études environnementales. Sur le principe, un tel objectif semble correspondre parfaitement aux possibilités et à la souplesse d'un nez électronique. Cependant, si l'environnement est fréquemment cité parmi les applications possibles des nez électroniques, il faut reconnaître que les études visant la mesure des mauvaises odeurs sur le terrain restent très rares. La généralisation du concept du nez électronique au monitoring d'odeurs environnementales doit passer par la résolution d'un certain nombre de problèmes. La communication propose de mettre en évidence ces différentes limitations et problèmes. L'étude présentée pour illustrer ce propos est relative aux odeurs provenant de 5 sources typiques de l'environnement. Elle montre qu'un appareillage simple, utilisé sans grande précaution et sans trop se soucier de la reproductibilité des conditions d'échantillonnage parvient à identifier correctement l'origine des odeurs qu'on lui propose. [less ▲]

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See detailConstruir Imágenes. La enseñanza de la historia hispanoamericana a estudiantes de español.
Vanden Berghe, Kristine ULg

in van Esch, C.; Steenmeijer, M. (Eds.) 10e Symposium Spaans in Onderwijs, Onderzoek en Bedrijfsleven (1999, June)

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See detailBusiness failure prediction models : what is the theory looking for ?
Van Caillie, Didier ULg

in Proceeedings (Ed.) From day to day risks to crisis (1999, May 05)

This papers discusses the main trends emerging from the literature on business failure prediction and questions why and how a specific research dedicated to business failure prevention could emerge. The ... [more ▼]

This papers discusses the main trends emerging from the literature on business failure prediction and questions why and how a specific research dedicated to business failure prevention could emerge. The need for an explicit integration of global performance indicators and for failure paths characterizing major failure processes is also particularly stressed. [less ▲]

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See detailPhylogeography and taxonomy of woodmice (Apodemus sylvaticus) populations from Western Palearctic: RFLP of the mtDNA variability
Michaux, JR; Libois, Roland ULg; Ramalhinho, Maria da Graça et al

in Ylönen, Hannu; Hentonnen, Heikki; Laajalahti, Päivi (Eds.) et al 3rd European congress of mammalogy (1999, May)

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See detailTaking account of not motorized trips and road unsafety in a global urban development project
Hanocq, Philippe ULg

in Lombardo, Calabi, Scozzafava, Marchetti (Ed.) Développement soutenable du milieu urbain (1999, May)

This paper examines the ways to impulse some new urban policies and attitudes in favour of not motorized urban travel's modes.

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See detailRecent evolution of the status of the European mink (Mustela lutreola) and of the otter (Lutra lutra) in France.
Libois, Roland ULg; de Bellefroid, Marie des Neiges; Rosoux, René

in III International Symposium "Semiaquatische Säugetiere und ihre Lebenräume (1999, May)

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See detailFrom the germinal cells to the newborn animal: the transmission of genes and life through the generations
Drion, Pierre ULg; Scenzi, Otto; Ectors Francis et al

(1999, May)

During the last decade, the technology of reproduction progressed considerably leading to a certain availability of in vitro methods for fertilization, maturation of the oocyte and culture system for the ... [more ▼]

During the last decade, the technology of reproduction progressed considerably leading to a certain availability of in vitro methods for fertilization, maturation of the oocyte and culture system for the embryos. The most spectacular manipulations are cloning and transgenesis… This review focuses on the early appearance of the germinal cells precursors and the longstanding destiny of the gametes in mammals. The evident complexity and long-term programmation of events in gametes and early embryo explain the difficulties to succeed in in-vitro methods and the occurrence of unexpected alterations of development, e.g. embryonic or fetal mortalities, large weight newborn syndrome and other dys-regulations in imprinting or DNA transmission. “Studying and teaching the reproductive physiology in mammals, we sometimes imagine that a newborn animal survived two pregnancies: the first one would be a high risk pregnancy that represents the oocyte development and survival inside the follicle with a tetraploïd genome and the zona pellucida & cumulus cells as placenta-like structures. Around the first birth (ovulation), oocytes (individuals) accept in vitro conditions for maturation, fertilization and culture. Afterwards, a second pregnancy will be necessary in the mother or in the recipient uterus; a low risk pregnancy depending on the oocyte competence acquisition and on the conditions or length of exposure in vitro. “ [less ▲]

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See detailA propos de l'intervalle de confiance des indices d'aptitude Cp et Cpk
Barette, Ph.; Palm, Rodolphe ULg

in XXXIèmes Journées de Statistiques (1999, May)

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See detailThe role of bone sialoprotein in bone metastasis
Bellahcene, Akeila ULg; Waltregny, David ULg; Castronovo, Vincenzo ULg

in Skouteris, G. G.; Nicolson, G. L. (Eds.) Intermolecular Cross-Talk in Tumor Metastasis (1999, May)

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See detailDeconstructing the rational model : the case of mergers
Schoenaers, Frédéric ULg; Rondeaux, Giseline ULg

in collectif (Ed.) Proceedings of the Ninth European Congress on Work and Occupational Psychology (EAWOP) (1999, May)

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See detailTopology Optimization with Different Stress Limit in Tension and Compression
Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

This report presents new progresses in topology optimization of continuum structures with stress constraints. One principal contribution consists in the consideration of equivalent stress criteria which ... [more ▼]

This report presents new progresses in topology optimization of continuum structures with stress constraints. One principal contribution consists in the consideration of equivalent stress criteria which can generalization of von Mises criterion and which are able to take into account non equal stress limits in tension and compression. A literature review led us to consider Raghava and Ishai criteria, which include a contribution of hydrostatic pressure. With the help of these criteria topology optimization can predict more realistic designs in which structural members are able to withstand better tension loads than compression loads, or vice-versa, as it is sometimes encountered in civil engineering or in composite material design. The implementation and sensitivity analysis aspects of Raghava and Ishai criteria in the Finite Element context are presented. We also present recent advanced developments to the solution of topology problems with stress constraints like the stress constraint relaxation technique and the numerical optimization procedure based on convex approximations and dual optimizers. Finally numerical applications will show the original character of the stress based topology designs ad versus compliance designs when there are unequal stress limits or when there are more than one load case. [less ▲]

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See detailAlmost Isotropic Perimeters in Topology Optimization: Theoretical and Numerical Aspects
Petersson, Joakim; Beckers, Muriel; Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

We consider topology optimization of elastic continuum structures including a bound on the perimeter of the structural domain. Such a bound is known to ensure existence of solutions and it stabilizes the ... [more ▼]

We consider topology optimization of elastic continuum structures including a bound on the perimeter of the structural domain. Such a bound is known to ensure existence of solutions and it stabilizes the behavior of numerical finite element (FE) solutions. However the straightforward way of calculating the perimeter is rotationally mesh-dependent. In this paper we present new perimeter formulae with weaker rotational dependence i.e. perimeters that are almost isotropic. An overview of some theoretical results as well as numerical tests are given. [less ▲]

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See detailCompressor and Turbine Blade Design by Optimization
Léonard, Olivier ULg; Rothilde, André; Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

Compressor and turbine blade design involves thermodynamical, aerodynamical and mechanical aspects, resulting in an important number of iterations. Inverse methods and optimization procedures help the ... [more ▼]

Compressor and turbine blade design involves thermodynamical, aerodynamical and mechanical aspects, resulting in an important number of iterations. Inverse methods and optimization procedures help the designer in this long and eventually frustrating process. In this paper an optimization procedure is presented which solves two types of two-dimensional or quasi-three-dimensional problems: the inverse problem, for which a target velocity distribution is imposed, and a more global problem, in which the aerodynamic load is maximized. [less ▲]

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See detailUne méthode globale d'optmisation des treillis
Latteur, Pierre ULg; Samyn, Philippe

(1999, May)

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See detailAerodynamic and Mechanical Design of Compressor Blades Including Static Analysis
Adam, Olivier; Marin, Frédéric; Essers, Jean-André ULg et al

in Proceedings od the 3rd World Congress of Structural and Multidisciplinary Optimization (1999, May)

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See detailInfluence des facteurs familiaux sur la motivation scolaire des enfants de 1re primaire
de Landsheere, Viviane ULg; Hindryckx, Geneviève ULg; Schockert, Catherine

in Actes du 7e Congrès international de l'Association internationale pour la formation et la recherche en éducation familiale (1999, April)

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See detailALE Methods for Stationary Solutions of Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in Covas, J. A. (Ed.) Proceedings of the Second ESAFORM Conference on Material Forming (1999, April)

In this paper, two efficient convection algorithms are briefly presented in order to update the value stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in ... [more ▼]

In this paper, two efficient convection algorithms are briefly presented in order to update the value stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in solid mechanics. They are based on the finite volume method and on the Streamline Upwind Petrov Galerkin method. An application to cold rolling process is presented. [less ▲]

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See detailIntérêt de l'évaluation isocinétique du genou gonarthrosique
Henrotin, Yves ULg; Croisier, Jean-Louis ULg; Dumont, R. et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailIndications et modalités de la rééducation isocinétique de l'épaule
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg; Namurois, Marie-Hélène ULg et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailProtocoles excentriques appliqués aux tendinites rotuliennes
Croisier, Jean-Louis ULg; Godon, Bernard ULg; Giordano, F. et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailSignification des épreuves isocinétiques de résistance à la fatigue
Croisier, Jean-Louis ULg; Orban, O.; Crielaard, Jean-Michel ULg

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailUse of bidirectional reflectance distribution function in a particle tracing method
Dindart, Jean-François; Embrechts, Jean-Jacques ULg; Sémidor, Catherine

in Proceedings of the 2nd Convention Forum Acusticum (1999, March)

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See detailEtat d'avancement de la recherche en conseil de fumure azotée en froment d'hiver
Maes, N.; Franc, Jean; Herman, Jean-Luc et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailPrincipes de base pour une bonne utilisation des fongicides à base de strobilurines
Meeùs, Patrick; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes froments hybrides: une phytotechnie adaptée
Franc, Jean; Couvreur, Luc; Bodson, Bernard ULg et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes traitements régulateurs à base de CCC: du nouveau!
Bodson, Bernard ULg; Weickmans, Bernard; Haquenne, W.

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLa diminution des intrants dans la production des céréales
Roisin, Christian; Goffart, Jean-Pierre; Frankinet, Marc et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLa comparaison des systèmes européens de production du blé d'hiver
Falisse, André; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes conseils de fumure azotée
Bodson, Bernard ULg; Herman, Jean-Luc; Destain, Jean-Pierre ULg et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailElaboration de méthodes indirectes de criblage des animaux traités par des substances à effet anabolisant.
Bertozzi, Carlo; Portetelle, Daniel ULg; Vleurick, Lieve et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailTraçabilité & Identification : les maîtres mots du contrôle des maladies et de la qualité des produits d’origine animale
Mortiaux, Frédéric; Botton, Y.; Collaux, J. C. et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailTraçabilité en spéculation porcine par la méthode des empreintes génétiques
Portetelle, Daniel ULg; Pevenage, Sabine; Mortiaux, Frédéric et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailPanorama des démarches qualité : à chaque stratégie son outil.
Sindic, Marianne ULg; Fumière, Olivier; Romnée, Jean-Michel et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailUnified lubricated and dry friction modeling by an extension of the radial return scheme
Ponthot, Jean-Philippe ULg

in Seventh International Symposium on Plasticity and its current applications: special session on « Computational Modeling of Frictional Contact Processes (1999, January)

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See detailDéveloppement d’un modèle intégré d’optimisation des structures navales et hydrauliques
Rigo, Philippe ULg

in Revue Construction Métallique, Rubrique Thèses, n°1-1999, (1999, January)

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See detailColumn Abundance measurements of formaldehyde above the Jungfraujoch.
Demoulin, Philippe ULg; Zander, Rodolphe ULg; Mélen, F. et al

in Atmospheric Spectroscopy Applications 1999 - Proceedings (1999)

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See detailMetal plastic behaviour linked to texture analysis and FEM method
Duchene, Laurent ULg; Godinas, André; Habraken, Anne ULg

in 4th International Conference NUMISHEET 1999 (1999)

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See detailLes évaluations externes en Communauté française de Belgique : quel sens donner à la mesure ?
Lafontaine, Dominique ULg

in Actes du XIIIe Colloque de l'Adméé Europe, Dijon (1999)

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See detailCiliary ultrastructure in healthy dogs: preliminary results.
Clercx, Cécile ULg; Peeters, Dominique ULg; Willems, Tom et al

in Proceedings of the 9th Annual Congress of the ESVIM (1999)

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See detailEffects of sunshine/rain cycles on the behaviour of repairing systems
Courard, Luc ULg; Degeimbre, Robert ULg; Darimont, Anne ULg et al

in Ohama, Y.; Puterman, M. (Eds.) Adhesion between polymers and concrete (1999)

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See detailGravitational Lensing by Damped LY alpha Absorbers
Smette, A.; Claeskens, Jean-François ULg; Surdej, Jean ULg

in Carilli, C. L.; Radford, S. J. E.; Menten, K. M. (Eds.) et al Highly Redshifted Radio Lines, ASP Conf. Series Vol. 156 (1999)

Spiral galaxies are thought to be the main responsible for the damped Ly-alpha (DLA) systems seen in QSO spectra. They can also act as gravitational lenses, affecting quantities derived in DLA surveys ... [more ▼]

Spiral galaxies are thought to be the main responsible for the damped Ly-alpha (DLA) systems seen in QSO spectra. They can also act as gravitational lenses, affecting quantities derived in DLA surveys. Assuming that z > 0 spiral galaxies are similar to local ones, we find that, at z 0.5, the number density of DLA systems may be over-estimated by up to 90% and the HI cosmological density (Omega[SUB]HI[/SUB]) by up to 170% in a survey using bright b[SUB]q[/SUB] = 16, z[SUB]q[/SUB] ga 2 QSOs and in the absence of important extinction by dust. Applying our model to existing surveys, we find that Omega[SUB]HI[/SUB] is significantly over-estimated only in the z < 1.7 ones (by 34%). Furthermore, statistical tests indicate that these surveys are indeed affected by gravitational lensing at a 2.3% confidence level. If luminosity functions for flat-spectrum radio-sources and optically selected QSOs are similar in shape and slopes, similar Gling effects should affect surveys for 21cm absorbers using bright, high-z flat-spectrum radio-sources. [less ▲]

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See detailPost mortem investigations on a fin whale Balaenoptera physalus stranded along the Belgian coast
Jauniaux, Thierry ULg; Charlier, G.; Desmecht, M. et al

in Proceeding of the 13th Annual conference of the European Cetacean Society (1999)

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See detailIntégration du transfert de rugosité à un modèle de laminage à froid
COLLETTE, C.; COUNHAYE, C.; Ponthot, Jean-Philippe ULg

in Journées Sidérurgiques Internationales ATS (1999)

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See detailOptimalisation du programme de la formation initiale en didactique des langues germaniques à l'Université de Liège par une meilleure articulation de la théorie et de la pratique didactiques
Simons, Germain ULg

in Bechard, J.-P.; Grégoire, D. (Eds.) Apprendre et enseigner autrement. Actes du 16e Colloque International de l'Association Internationale de Pédagogie Universitaire (1999)

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See detailProgress in the modelization of light reflection for lighting calculations
Embrechts, Jean-Jacques ULg

in Proceedings of the 24th Session of the C.I.E. , CIE Publication n°133-Part 1 (1999)

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See detailAdaptive $\lambda$-tracking for Linear Systems with Higher Relative Degree---The Continuous Adaptation Case
Bullinger, Eric ULg; Allgöwer, F.

in Proc. of the 5th European Control Conference, ECC'99 (1999)

This paper presents a simple adaptive controller which universally achieves so-called X-tracking for linear systems where only little structural information about the system to be controlled is needed ... [more ▼]

This paper presents a simple adaptive controller which universally achieves so-called X-tracking for linear systems where only little structural information about the system to be controlled is needed. The paper extends previous results to the case of systems with higher relative degree. Stability and convergence of the adaptation is proven for tracking arbitrary but sufficiently smooth reference trajectories. The design of the controller is very simple and intuitive and only few parameters have to be tuned. The robustness is increased by the introduction of a dead-zone in the adaptation, whose width X can be chosen by the user. In this paper a continuous adaptation law is used as opposed to the discrete law suggested in earlier papers. The’re are several advantages in using a continuous adaptation: Besides displaying a simpler structure the necessary gain to achieve the control goal will also be significantly lower in general. To demonstrate the performance the controller is applied to the model of a ball and plate experiment. [less ▲]

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See detailDetailed calibration of a deterministic transport model on multi-tracer tests: analysis and comparison with semi-analytical solutions
Haerens, B.; Brouyère, Serge ULg; Dassargues, Alain ULg

in Stauffer, F.; Kinzelbach, W.; Kovar, K. (Eds.) et al Calibration and Reliability in Groundwater Modelling Pre-published Proc. of ModelCARE99 (1999)

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See detailLe Topos du manuscrit trouvé dans les contes de Voltaire
Tilkin, Françoise ULg

in Herman, Jan; Hallyn, Fernand; Peeters, Kris (Eds.) Le Topos du manuscrit trouvé. Actes du colloque international, Louvain-Gand, 22-23-24 mai 1997 (1999)

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See detailCharacterization of menin from leucocytes of normal and men 1-affected individuals
Poncin, J.; Closset, J.; Legros, J.-J. et al

in 7th International workshop on Multiple Endocrine Neoplasia - Abstract book (1999)

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See detailEffets de la nature de la ration et du moment de prélèvement du jus de rumen sur la fermentescibilité d'aliment fibreux en seringue.
Ndimubandi, Albéric; Fonck, Myriam; Buldgen, André et al

in 6èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 1-2 décembre 1999 (1999)

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See detailEmergency control and its strategies
Wehenkel, Louis ULg

in Proceedings of the Power Systems Computation Conference 1999 (1999)

The objective of this paper is to discuss research trends in the context of power system emergency control. First, different possible strategies are discussed for the design of emergency control schemes ... [more ▼]

The objective of this paper is to discuss research trends in the context of power system emergency control. First, different possible strategies are discussed for the design of emergency control schemes. Then some new research directions are presented. The paper does not restrict its scope to a particular type of stability problem. Rather, it aims at providing a global view of emergency control and discusses the potential impact of new approaches. [less ▲]

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See detailRôle de certaines caractéristiques des élèves sur la quantité et la qualité de leur engagement moteur
Ledent, Maryse; Cloes, Marc ULg; Lefèvre, Fabien et al

in Carlier, Ghislain; Delens, Cécile; Renard, Jean-pierre (Eds.) Actes du colloque AFRAPS-EDPM "Identifier les effets de l'intervention en motricité humaine" (1999)

Carreiro da Costa et coll. (1997) résument les critères d'efficacité de l'enseignement de la manière suivante: lorsqu'on poursuit des objectifs d'apprentissage, il convient que l'élève soit physiquement ... [more ▼]

Carreiro da Costa et coll. (1997) résument les critères d'efficacité de l'enseignement de la manière suivante: lorsqu'on poursuit des objectifs d'apprentissage, il convient que l'élève soit physiquement engagé, qu'il répète des exercices critères ou directement en relation avec les tâches à apprendre, que son engagement soit couronné de succès, qu'il reçoive des réactions à sa prestation mais également qu'il veuille progresser. Le professeur favorisera l'apprentissage en intervenant sur le nombre de répétitions des tâches, l'organisation des exercices, la variété des activités et l'adaptation de la difficulté au niveau des élèves. ... [less ▲]

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See detailEffects of growth hormone therapy on bone metabolism in patients with adult-onset : a 2-year open randomized controlled multicentre trial
Bex, M.; Abs, R.; Maiter, D. et al

in The 6th International Pituitary Congress - Abstract book (1999)

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See detailArtefakttolerante Regelungen für die Anästhesie
Frei, C. W.; Bullinger, Eric ULg; Sieber, T. et al

in Fortschritts-Berichte VDI, Reihe 17, Nr. 183 AUTOMED '99, Beiträge zum Workshop `Automatisierungstechnische Verfahren für die Medizin' (1999)

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See detailDie Haftung des säumigen Schuldners für Zufall. Von Gaius D.16.3.14.1 bis zum Code civil
Gerkens, Jean-François ULg

in Ackermann, Thomas; Arnold, Arnd; Eckhardt, Diederich (Eds.) et al Tradition und Fortschritt im Recht: Bonner Tagung 8-11. September 1999 (1999)

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See detailSimulation de l'impact des mesures de l'Agenda 2000 sur le revenu des exploitations agricoles wallonnes
Burny, Philippe ULg; Poncin, F.

in Association belge d'Economie Rurale (Ed.) Troisième workshop pour économistes agricoles : proceedings, Leuven (Heverlee), KUL, 28 April, 1999 (1999)

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See detailTrophic position and cadmium content of dolphins and tunas from the Northeast Atlantic
Das, Krishna ULg; Bouquegneau, Jean-Marie ULg

in Cruz, J.; Raga, J. A.; Evans, P. G. H. (Eds.) European Research on Cetaceans - 13. Proceedings of the Thirteenth Annual Conference of the European Cetacean Society 5-8 April 1999. (1999)

Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic ... [more ▼]

Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotopes (13C/12C and 15N/14N) analyses were performed in three predator species from the Northeast Atlantic: the striped dolphin, Stenella coeruleoalba, the common dolphin Delphinus delphis, and the albacore tuna, Thunnus alalunga, and compared to their previously described stomach content. Heavy metals (Cd, Zn, Cu and Fe) are mainly transferred through the diet and so, have been determined in the tissues of the animals. Albacore tunas muscles display higher 15N than in common and striped dolphins (mean: 11.4 0/00 vs. 10.3 0/00 and 10.4 0/00, respectively) which reflects its higher trophic level. Higher 13C are found in common (-18.4 0/00) and striped dolphin (-18.10/00) muscles than in albacore tuna (-19.3 0/00). Differences also appear in heavy metal contents, especially cadmium in muscles, lower in albacore tuna than in dolphins (0.37 and 0.1 ppm DW for striped and common dolphins vs.<0.07 ppm DW for albacore tuna) which probably reflects in dolphins a cadmium contamination through squid assimilation. These results suggest that, despite a close hunting association, the trophic position of these three predators is quite well distinct. [less ▲]

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See detailPerceptions de compétence et de comportement par des élèves considérés comme les "meilleurs" et les "plus faibles" en éducation physique
Luts, Kathy; Ledent, Maryse; Piéron, Maurice et al

in Carlier, Ghislain; Delens, Cécile; Renard, Jean-Pierre (Eds.) Actes du colloque AFRAPS-EDPS "Identifier les effets de l'intervention en motricité humaine (1999)

L'image qu'un individu possède de lui-même influence ses attitudes, ses motivations et ses comportements. Faire preuve de compétence apporte un sentiment de fierté et de satisfaction à l'élève. A l'opposé ... [more ▼]

L'image qu'un individu possède de lui-même influence ses attitudes, ses motivations et ses comportements. Faire preuve de compétence apporte un sentiment de fierté et de satisfaction à l'élève. A l'opposé, l'échec peut aboutir à un sentiment d'incompétence et de frustration. En effet, la qualité des expériences motrices vécues, les succès ou les échecs rencontrés au cours des activités physiques figurent parmi les déterminants critiques du développement de l'auto-perception de l'élève par rapport à l'activité sportive, qu'elle prennent place à l'école ou dans un club. ... [less ▲]

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See detailL'arbitrage et les groupes de sociétés
Caprasse, Olivier ULg

in L'arbitrage dans la vie des sociétés (1999)

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See detailDétermination du besoin en méthionine du taurillon Blanc Bleu Belge culard en finition.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in 6èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 1-2 décembre 1999 (1999)

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See detailCinq remarques sur la contractualisation, les territoires et le développement régional
Merenne-Schoumaker, Bernadette ULg

in Contrats, territoires et développement régional (1999)

General conclusions of a symposium on the role of contracts in regional development

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See detailUpward Revision of the Individual Masses in Α Cen: Implications for the Evolutionary State of the System
Neuforge, Corinnne; Pourbaix, D.; Noels-Grötsch, Arlette ULg et al

in Hearnshaw, J. B.; Scarfe, C. D. (Eds.) Precise Stellar Radial Velocities: IAU Colloquium 170 : proceedings of a meeting held at Victoria, B.C., Canada, 21-26 June, 1998 (1999)

The recent upward revisions of the individual masses of the components of the binary system α Centauri (Pourbaix D., this meeting) led us to perform new calibrations of the system. The possibility of the ... [more ▼]

The recent upward revisions of the individual masses of the components of the binary system α Centauri (Pourbaix D., this meeting) led us to perform new calibrations of the system. The possibility of the onset a convective core in α Cen A is discussed together with its implications on the p-mode oscillation frequencies. [less ▲]

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See detailA compartimentalized model for trickle flow through packed beds based on x-ray tomograms
Toye, Dominique ULg; Marchot, Pierre ULg; Crine, Michel ULg et al

in Flamand, G. (Ed.) Récents Progrès en Génie des procédés - N°69 - Tools fro process understanding and control - Proceedings of the 2nd European Congress on Chemical Engineering – ECCE2, 05 – 07 octobre 1999, Montpellier, France (1999)

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See detailGuidelines to Adapt the General Principles of the Non-statistical Meta-analysis Method to Specific Fields of Biomedical Research: the Example of Molecular Oncology.
Pasleau, Françoise ULg; Delvenne, Catherine ULg; Cielniaszek, Nadine

in Libraries without limits : changing needs – changing roles Proceedings of the 6th European Conference of medical and Health Libraries. (1999)

In most circumstances, considerable time lags before results from biomedical research are integrated in general medical practice are inevitable. Several economic, technical factors and educational ... [more ▼]

In most circumstances, considerable time lags before results from biomedical research are integrated in general medical practice are inevitable. Several economic, technical factors and educational orientation are responsible for this gap. Effective information management at the institutional level, could provide clinicians the means to adopt new perspectives. At present, the link between basic research and clinical application relies upon the motivation of individuals to develop new skills in literature retrieval and analysis and yet their occupational responsabilities inhibit this endeavour. Academic librarians, educated and trained in information and biomedical sciences, have a role in providing physicians with current and readily applicable knowledge from the critical analysis of the literature. The Faculty of Medicine Library is developing a research programme to design an updated and comprehensive picture of the diagnostic and prognostic biological markers in the field of human prostate cancer. The final product is envisioned as a database accessible on the web that will integrate bibliographic analyses and results from prospective and retrospective studies conducted at the University of Liège. As this product is designed to have a direct impact on clinical decision making and patient care, it should guarantee thoroughness, relevancy and objectivity and not become yet another narrative review of the literature. Over the last decade, there has been a movement towards using statistical meta-analyses to synthesize literature. This method has proven to be useful when similar strategies are used to produce similar quantitative outcomes that can be merged for statistical analysis.1 Even though studies in cancer research assess the same model, they are often too fragmented or heterogeneous in their design, methods and instrumentation. Approaches have been developed to conduct non-statistical meta-analysis of such publications.2 Quantitative and qualitative meta-analyses are based on common principles which are largely discussed in the literature. They are related to model development, literature coding, rating references for quality and annotating and synthesizing high quality references. In practice, these basic principles require translation into actual instructions adapted to every domain of biomedical research. Variable definition is a very critical step that governs the quality of subsequent analyses. Specific examples provided illustrate the guidelines acquired from our experience. Il s'écoule souvent un intervalle de temps fort long avant que les nouveaux concepts issus de la recherche biomédicale soient intégrés dans la pratique médicale courante. Les raisons de cette situation sont autant d'ordre économique et technique que culturel. Actuellement, les liens entre la recherche fondamentale et la médecine clinique ne peuvent exister que sur base d'initiatives individuelles et les médecins concernés doivent investir une partie de leur temps dans l'apprentissage des techniques de recherche et d'analyse de la littérature. Une gestion professionnelle de l'information au niveau d'une institution telle qu'un hôpital universitaire devrait par contre inciter davantage de cliniciens à utiliser les ressources de la littérature issue de la recherche biomédicale. C'est pourquoi la Bibliothèque de la Faculté de Médecine de l'Université de Liège propose, à titre expérimental, de créer un prototype de site web consacré à l'étude des marqueurs pronostiques et diagnostiques du cancer de la prostate. Des scientifiques, spécialisés en sciences biomédicales et formés aux techniques de gestion documentaire, fourniront à l'intention des médecins spécialistes et/ou généralistes, voire des patients eux-mêmes, une analyse critique de la littérature en relation directe avec les activités cliniques de l'institution. Notre objectif étant de fournir aux médecins des informations susceptibles d'être utilisées comme bases de décision clinique, notre responsabilité se trouve engagée vis à vis des patients. Nous devrons donc définir une stratégie qui garantisse à la fois l'exhaustivité et la pertinence de l'information traitée et l'objectivité des analyses présentées. Sur base des principes de la méta-analyse,1,2 nous avons conçu un protocole en cinq étapes comprenant: la définition à priori des objectifs, la recherche non biaisée d'information, la définition de critères de sélection des études, l'extraction et la synthèse des données. La difficulté consistera à traduire ces principes en une série de consignes pratiques et techniques et d'en dégager des lignes de conduite générales qui permettront d'étendre cette approche à n'importe quel domaine de la médecine. 1. D'Agostino RB, Weintraub M. Meta-analysis: a method for synthesizing research. Clin Pharmacol Ther 1995;58:605-616 2. Bland CJ, Meurer LN, Maldonado G. A systematic approach to conducting a non-statistical meta-analysis of research literature. Acad Med 1995;70:642-653 [less ▲]

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See detailSpecies diversity and survival, gap formation and recovery dynamics in ecosystems exposed to climate extremes
Van Peer, L; Nijs, I; Bogaert, Jan ULg et al

in The European dimension in ecology, perspectives and challenges for the 21th century (1999)

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See detailDe la justification thérapeutique du periskythismos et de l'hypospathismos
Marganne, Marie-Hélène ULg

in Ternes, Charles-Marie (Ed.) La thérapeutique dans l'Antiquité. Pourquoi ? Jusqu'où ? Actes des Huitièmes Rencontres Scientifiques de Luxembourg (Luxembourg, 3-4 mars 1997) (1999)

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See detailA unified radial return scheme for visco-plasticity and mixed hardening
Ponthot, Jean-Philippe ULg; Papeleux, Luc ULg; Gohy, S.

in Seventh International Symposium on Plasticity and its current applications (1999)

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See detailComment des élèves plus ou moins compétents dans la discipline sportive enseignée perçoivent-ils leurs leçons d'éducation physique?
Delfosse, Catherine; Cloes, Marc ULg; Luts, Kathy et al

in Carlier, Ghislain; Delens, Cécile; Renard, Jean-Pierre (Eds.) Actes du colloque AFRAPS-EDPM "Identifier les effets de l'intervention en motricité humaine" (1999)

S'interroger sur la manière dont les élèves perçoivent leurs leçons d'éducation physique répond au besoin de connaître leurs dispositions affectives et à la nécessité d'en tenir compte. Cette étude s ... [more ▼]

S'interroger sur la manière dont les élèves perçoivent leurs leçons d'éducation physique répond au besoin de connaître leurs dispositions affectives et à la nécessité d'en tenir compte. Cette étude s'inscrit dans le cadre d'une recherche portant sur la prise en considération, par les enseignants, des caractéristiques individuelles de leurs élèves. Les aspects motivationnels sont incontournables dans l'apprentissage, ce dont les enseignants sont intuitivement persuadés. Les résultats de l'analyse de l'enseignement ont largement contribué à confirmer et à quantifier ces impressions. ... [less ▲]

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See detailA new fast and non-destructive method for evaluating the superconducting properties of bulk materials
Vanderbemden, Philippe ULg; Aouina, Zoubir; Cloots, Rudi ULg et al

in Obradors, X.; Sandiumenge, F.; Fontcuberta, J. (Eds.) Applied Superconductivity 1999. Volume 1 : Large Scale Applications (1999)

This paper aims at reporting a new, simple and low-cost experimental technique designed for investigating the electrical properties of disk-shaped superconducting samples. The principle is similar to that ... [more ▼]

This paper aims at reporting a new, simple and low-cost experimental technique designed for investigating the electrical properties of disk-shaped superconducting samples. The principle is similar to that of an induction motor. Two neighbouring and 90° out-of-phase AC magnetic fields are applied perpendicularly to the disk to be measured. As a result, the material experiences an electromagnetic torque which depends on its electrical properties. In this paper the experimental system is briefly described and illustrative measurements on different HTS are reported and discussed. [less ▲]

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See detailMorphological particularities of the head in four Carapidae (Ophidiiformes)
Parmentier, Eric ULg; Chardon, Michel ULg; Poulicek, Mathieu ULg et al

in Séret, Bernard; Sire, Jean-Yves (Eds.) 5th Indo-Pacific Fish Conference, Noumea - New Caledonia, 3-8 November 1997: Proceedings (1999)

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has ... [more ▼]

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has undertaken to compare it with the diet related characters. The cephalic organization of E. boraborensis and E. gracilis seems related to diet (mainly fishes and shrimps for the first one and holothurian tissues for the other) : these fishes are respectively commensal and parasitic. Although the feeding characters of E. homei and C. acus are closely similar to those of E. boraborensis, there are sparse observations of holothurian tissues in their stomach contents. It is suggested that these fishes are commensal when they are adults and have parasitic tendency when they are juvenile. [less ▲]

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See detailOptimization Methods for Inverse Problems in Large Strain Plasticity
KLEINERMANN, J. P.; Ponthot, Jean-Philippe ULg

in 1st CanCNSM – Canadian Conference on Nonlinear Solid Mechanics (1999)

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See detailVertical column abundances of COF2 above the Jungfraujoch Station: update and consolidation of the database with measurements in the nu4 band region.
Mélen, Francine; Mahieu, Emmanuel ULg; Demoulin, Philippe ULg et al

in Atmospheric Spectroscopy Applications 1999 - Proceedings (1999)

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See detailSpringback simulation in sheet metal forming using implicit algorithms
Papeleux, Luc ULg; GOHY, S.; COLLARD, X. et al

in . NUMISHEET’99, the Fourth International Conference and Workshop on Numerical Simulation of 3D Sheet Forming Processes (1999)

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See detailDeux déesses en interaction : Aphrodite et Astarté dans le monde égéen
Pirenne-Delforge, Vinciane ULg; Bonnet, Corinne

in Bonnet, Corinne; Motte, André (Eds.) Les syncrétismes religieux dans le monde méditerranéen antique. Actes du Colloque international en l'honneur de Franz Cumont à l'occasion du cinquantième anniversaire de sa mort (Rome, Academia Belgica, 25-27 septembre 1997) (1999)

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See detailAn extension of the Radial Return Scheme for Springback Similation in Sheet Metal Forming
GOHY, S.; Papeleux, Luc ULg; COLLARD, X. et al

in 6th ICTP-International Conference on Technology of Plasticity, Nuremberg (1999)

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See detailFacultative paedomorphosis in the Alpine newt, Triturus a. alpestris: feeding habits and habitat use in an Alpine lake
Denoël, Mathieu ULg; Joly, Pierre; Poncin, Pascal ULg

in Miaud, C.; Guyetant, G. (Eds.) Current Studies in Herpetology (1999)

Feeding habits and micro-habitat use were compared between metamorphs and paedomorphs in a population of the Alpine newt, Triturus a. alpestris in the French Alps. This population occupies a deep Alpine ... [more ▼]

Feeding habits and micro-habitat use were compared between metamorphs and paedomorphs in a population of the Alpine newt, Triturus a. alpestris in the French Alps. This population occupies a deep Alpine lake. The paedomorphs largely outnumbered the metamorphs. Whereas paedomorph diet was mainly composed of plankton, that of metamorphs was especially composed of larval and adult insects. The spatial use of the habitat also differed between the two forms: the paedomorphs occupied all the micro-habitats (shore, bottom, water column and surface) while the metamorphs were only found along the shore and at the water surface. In such a deep lake paedomorphosis may have persisted because of a different use of both feeding resources and micro-habitat [less ▲]

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See detailL’internationalisation des espaces de commerce et de la consommation : conclusion du colloque
Merenne-Schoumaker, Bernadette ULg

in Barata Salgueiro, Teresa (Ed.) The Globalization of Consumption and Retail Places - L’internationalisation des espaces de commerce et de la consommation (1999)

Main conclusions of a workshop in Geography devoted to the internationalization of trade

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See detailA quantitative approach to ecotone creation for nature reserve design.
Bogaert, Jan ULg; Salvador-Van Eysenrode, D; Van Hecke, P et al

in The European dimension in ecology, perspectives and challenges for the 21th century (1999)

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See detailStudy and Characterization of Inclusions in Steels obtained from ESR and Conventionally Electrical Ingot Processes
Lecomte-Beckers, Jacqueline ULg; Tchuindjang, Jérôme Tchoufack ULg

in Proceedings of the Annual Meeting of the SBM (société belge de microscopie). (1999)

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the ... [more ▼]

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the microstructure of the materials, and then on the other hand their mechanical properties in service. [less ▲]

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See detailActes de colloque: L'utilisation des nouvelles technologie de l'éducation ou les aléas et les contradictions d'un projet stratégique
Robert, Jocelyne ULg

in Béchard, J.-P.; Gregoire, D. (Eds.) Apprendre à enseigner autrement (1999)

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See detailPerspectives et limites de l'échocardiographie Doppler en cardiologie équine
Amory, Hélène ULg

in Proceedings of the 16th Annual Congress of the Belgian Equine Practitioners Society (BEPS) (1999)

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See detailDetermination of methionine requirement of growing double-muscled Belgian Blue bull.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Book of abstract of the VIIIth International Symposium on Protein Metabolism and Nutrition. (1999)

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See detailCertification des soudeurs de géomembranes : expérience en Belgique
Courard, Luc ULg; Blomme, Paul

in Girard, H.; Gourc, Jean-Pierre (Eds.) Compye-rendu des rencontres 97 (1999)

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See detailDistemper in seals stranded on the Belgian coast during 1998 summer
Jauniaux, Thierry ULg; Desmecht, M.; Van Gompel, J. et al

in annual proceeding (1999)

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See detailSclerosing encapsulating peritonitis in two young Dobberman
Peeters, Dominique ULg; Michiels, LAurence; Zonderland, Jean-Luc et al

in Proceedings of the 9th Annual Congress of the ESVIM (1999)

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See detailClay barriers assesment : a coupled mechanical and moisture transfert model
Collin, Frédéric ULg; Li, Xian Ling; Radu, Jean-Pol ULg et al

in Clay barriers assesment : a coupled mechanical and moisture transfert model (1999)

A thermo-hydro-mechanical model is presented to tackle the complex coupling problems encountered in clay barriers. A detailed formulation coupling the heat, moisture (liquid water and water vapour) and ... [more ▼]

A thermo-hydro-mechanical model is presented to tackle the complex coupling problems encountered in clay barriers. A detailed formulation coupling the heat, moisture (liquid water and water vapour) and, air transfer in a deformable unsaturated soil is given. The formulation of the Alonso-Gens’s mechanical model for unsaturated soil is also incorporated. The sensitivity to some parameters and their determinations are analysed. Finally, a small scale wetting – heating test on compacted bentonite is performed for validation; the numerical results are compared to the experimental measurements. [less ▲]

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See detailL'identité culturelle : considérations psychologiques et éthiques
Richelle, Marc ULg

in Fukac, J. (Ed.) The crossroads of European culture 1998 : responsibility and hopes : proceedings of the conference held in Brno, 30.9 - 4.10.1998 (1999)

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