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See detailA dual thromboxane inhibitor and thromboxane receptor antagonist prevents pig myocardial infarction induced by coronary thrombosis
Rolin, S.; Petein, M.; Tchana-Sato, Vincent ULg et al

in European Heart Journal (2003), 24(Suppl. S), 325

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See detailOndelettes et télédétection.
Charles, Catherine ULg

in Actes des XXXVèmes Journées de Statistiques (2003)

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See detailIdentification of elastoplastic model parameters in large deformation problems using gamma methods
Jeunechamps, Pierre-Paul ULg; Walmag, J.; Mathonet, V. et al

in Proceedings of the 5th World Congress on Structural and Multidisciplinary Optimization (2003)

This paper reports on preliminary results of parameter identification problems in finite element non-linear analyses such as metal forming simulations. Two approaches are compared. The first one is the ... [more ▼]

This paper reports on preliminary results of parameter identification problems in finite element non-linear analyses such as metal forming simulations. Two approaches are compared. The first one is the classic Levenberg-Marquardt algorithm. The second one is a trust-region algorithm based on a quadratic model. The two algorithms are compared on two cases, one of them being an actuel experiment. [less ▲]

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See detailIntegral and derivative dispersion relations in the analysis of the data on p p and anti-p p forward scattering
Cudell, Jean-René ULg; Martynov, E.; Selyugin, Oleg V

in Ukrainian Journal of Physics (2003), 48(Nos. 11- 12, 2003),

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See detailLa qualité différenciée
Burny, Philippe ULg

in Centre de Recherches agronomiques de Gembloux (CRA) (Ed.) 3ème journée Productions porcines et avicoles "Vers une politique de qualité, à quel prix ?", Gembloux, 8 octobre 2003 (2003)

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See detailA longitudinal study of isokinetic characteristics of young athletes and prevention of muscular and joint injury: Preliminary results - Abstract
Amato, M.; Afriat, P.; Portero, P. et al

in Isokinetics & Exercise Science (2003), 11(1), 53-54

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See detailPresent day and geologic deformation rates in the Ardenne and the lower Rhine embayment (North-western Europe)
Van Camp, Michel; Camelbeeck, Thierry; Vanneste, K. et al

Conference (2003)

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See detailDioxins, furans and co-planar PCBs in juvenile harbour porpoises (Phocoena phocoena) from the Belgian coasts
Beans, Cristina ULg; Das, Krishna ULg; Jauniaux, Thierry ULg et al

Poster (2003)

Dioxins, furans and PCBs are lipophilic anthropogenic contaminants that have found their way into marine food webs and accumulate in top predators such as marine mammals, adding a stress factor to an ... [more ▼]

Dioxins, furans and PCBs are lipophilic anthropogenic contaminants that have found their way into marine food webs and accumulate in top predators such as marine mammals, adding a stress factor to an already vulnerable population. In this study 7 congeners of dioxins (PCDDs), 10 congeners of furans (PCDFs) and 4 congeners of coplanar PCBs (cPCBs) were determined using high resolution gas chromatography and mass spectrometry in the blubber of 19 juvenile harbour porpoises (Phocoena phocoena) stranded along the Belgian North Sea coastline between 1995 and 2001. These results were contrasted with nutritional status (emaciated or not), sex and trophic level (through stable carbon and nitrogen isotope analysis). Mean blubber concentrations of SPCDD/Fs were 12.8 pg/g lw (lipid weight) and mean related toxicity 1.84 pg TEQs/g lw (TEQs = TCDD toxic equivalents). Mean cPCB concentrations were 223,5 pg/g lw and mean related toxicity 4,47 pg TEQs/g lw. The levels detected in these individuals were of the same order as those found in a previous study in the Wadden Sea (Bruhn, 1999). Both sexes show rather similar levels. No significant relationship was observed between stable carbon or nitrogen isotope values and pollutant levels. Concentrations and toxicity show a tendency to be higher in emaciated ndividuals than in nonemaciated ones. This could indicate a possible relationship between the nutritional status of the animals and dioxinlike pollutants (which could participate in weakening the animal). This situation should be further studied on adult individuals in order to obtain a more global view of the possible effects on the population. [less ▲]

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See detailSynthèse d'analogues de tétraponérines, alcaloïdes défensifs des fourmis du genre tetraponera
Rouchaud, Anne; Durvaux, Christophe; Laurent, Pascal ULg et al

Poster (2003)

Les fourmis du genre Tetraponera appartiennent à la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d’attaque, ces fourmis disposent ... [more ▼]

Les fourmis du genre Tetraponera appartiennent à la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d’attaque, ces fourmis disposent leur abdomen latéralement et badigeonnent la cuticule de l’adversaire au moyen de leur aiguillon en forme de tire-ligne. L’injection en chromatographie gazeuse capillaire de cette sécrétion a montrés qu’elle était constituée de huit dérivés, les tétraponérine T-1 à T-8. Ces molécules se rattachent à des squelettes tricycliques originaux et possèdent des propriétés neurotoxiques et insecticides. Dans le cadre d’une étude structure-activité de ces alcaloïdes, nous nous sommes intéressés à la synthèse d’analogues basés sur un squelette decahydro-dipyrido[1,2-a : 1’,2’-c]pyrimidine. Les différentes conditions réactionnelles utilisées pour synthétiser ce squelette à partir de pipéridéine et de malonate de diéthyle, ainsi que la nature et la détermination de structure des produits obtenus dans chaque cas seront discutées. [less ▲]

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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 detailPour une histoire de l'affiche
Duchesne, Jean-Patrick ULg

in Actes du colloque Le conservateur et l'affiche (2003)

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See detailMeasurable impact of an old MSWI on the level of dioxins in free-range chickens and eggs grown in its vicinity
Pirard, C.; Focant, Jean-François ULg; Massart, A. C. et al

in Organohalogen Compounds (2003), 60-65

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See detailCalibration and quality assessment of water vapor radiometer observations using radiosonde GPS and VLBI
Pottiaux, Eric; Becker, M.; Buerki, B. et al

Conference (2003)

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See detailNumerical modelling of metal forming - current practice and advanced applications
Cescotto, Serge ULg; Duchene, Laurent ULg; Pascon, Frédéric ULg et al

in Iu, V. P.; Lamas, L. N.; Li, Y. P. (Eds.) et al Computational Methods in Engineering and Science, lu et al. (eds), Proceedings of the 9th International Conference of enhancement and Promotion of Computing Methods for Engineering and Science (2003)

This paper first summarizes the current possibilities and the perspectives of effective modeling of metal forming processes. Practical considerations on manpower requirement and data availability are ... [more ▼]

This paper first summarizes the current possibilities and the perspectives of effective modeling of metal forming processes. Practical considerations on manpower requirement and data availability are included in the discussion. Then, two examples of advanced applications are presented: the micro-macro approach for the modeling of sheet metal forming and the modeling of continuous casting. [less ▲]

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See detailPhosphate mineral formation in Lake Baïkal sediments and implications for paleoclimate
Fagel, Nathalie ULg; Alleman, L. Y.; André, Luc et al

Poster (2003)

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See detailWhole-body FDG PET in the follow-up of pediatric patients with lymphoma.
DE BARSY; DEPAS, G.; DRESSE, MF. et al

in Journal of Nuclear Medicine (The) (2003), 44

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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 detailMeasure Nouns (MNs), a case of ongoing grammaticalization?
Brems, Lieselotte ULg

Conference (2003)

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See detailHigh level Vibration Facility at cryogenic temperature
Grodent, Christophe ULg

Conference (2003)

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See detailWhole-body FDG PET imaging as a method for staging and early assessment of treatment response in pediatric patients with lymphoma.
DE BARSY; DEPAS, G.; DRESSE, MF. et al

in Journal of Nuclear Medicine (The) (2003), 44

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See detailStudy of the crp-like gene of Streptomyces coelicolor
Derouaux, Adeline ULg; Titgemeyer, Fritz; Dusart, Jean et al

Poster (2003)

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See detailAmmonium sulphate as promoting agent of the sulphidization process of oxidized Cu-Co ores from the Luiswishi deposit (RDC)
Bastin, David ULg; Frenay, Jean ULg; Philippart, Pierre

Poster (2003)

The Luiswishi deposit belongs to the Cu-Co deposits of the Southern Group of the Katangian Copper Belt and is operated by a joint venture between EGMF (Entreprises Générales Malta Forrest) and Gecamines ... [more ▼]

The Luiswishi deposit belongs to the Cu-Co deposits of the Southern Group of the Katangian Copper Belt and is operated by a joint venture between EGMF (Entreprises Générales Malta Forrest) and Gecamines (Générale des Carrières et des Mines). The Cu-Co ore is beneficiated by the sulphidization process at the NCK (New Concentrator of Kipushi) at Kipushi. Sulphidization followed by flotation with sulphydryl collectors is a common practice for the treatment of oxidized base metals ores. This process is complex and its application at the industrial scale is quite sensitive. In Central Africa it is also a cost intensive treatment as the sulphidizing agent has to be imported. In order to improve the metallurgical performances and to optimise the economics of the process, a laboratory research program was carried out by the Laboratory of Metallurgy and Mineral Processing (MTM) of the University of Liège in close collaboration with EGMF and Gecamines. This program included the study of various flotation reagents as dispersing, depressing and activating agents. This paper presents the results obtained with the use of ammonium sulphate as activator of the sulphidized xanthate flotation. Although ammonium sulphate has been mentioned in the literature as a promoting agent of the sulphidized xanthate flotation of malachite, its effects on the flotation of cobalt oxides was not known. The testworks were carried out on various oxidized siliceous ore types from the Luiswishi deposit. A 1.7 l Agitair laboratory flotation cell was used. NaHS and potassium amylxanthate were respectively choosen as sulphidizer and collector. A mixture of gasoil and tall oil (90/10) was used as secondary collector. A multistage sulphidization was realised. Values of pH were followed during the different tests and an ion selective electrode Ag/Ag2S was used to control the Es potentiel evolution during the stepwise addition of the sulphidizer. The addition of ammonium suphate [(NH4)2SO4] simultaneously with NaHS led to the following results: -A marked improvement of the sulfidization kinetics leading to shorter conditioning times and limiting the number of sulphidizing stages required to reach maximum recoveries. -The inhibition of the depressive effect on Cu and Co flotation of an excess of hydrosulphide ions in the pulp. -An improvement of the selectivity of the flotation combined with higher cobalt recoveries. The promoting effect is indeed more effective for cobalt than for copper and cobalt recoveries were improved by 4 to 8 %. -A significant decrease of the sulfidizer consumption. These laboratory results were implemented at an industrial scale at the NCK at Kipushi. In close accordance with the laboratory results the sulphidization kinetics were improved and the cobalt recoveries rose by 7 % while maintaining the previous Cu and Co grades of the concentrate. Ammonium sulphate being a low cost and common reagent (it is easily found in the fertiliser industry or as a byproduct of the coke industry), its use significantly improved the economics of the flotation of Cu-Co oxides ores from the Luiswishi deposit. [less ▲]

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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 detailAnalysis of PCDD/Fs in human blood plasma using CALUX bioassay and GC-HRMS: a comparison
Van Wouwe, Nathalie; Eppe, Gauthier ULg; Xhrouet, Céline ULg et al

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

in Astronomical Society of the Pacific Conference Series (2003)

Not Available

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See detailBelgian Report to the IAG-subcommission “EUREF”
Bruyninx, Carine; Defraigne, Pascale; Ducarme, Bernard et al

in Proceedings of EUREF 2002 Symposium (2003)

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See detailRetrospective time trend study of brominated flame retardants and polychlorinated biphenyls in human serum from various regions of the United States, 1985-2002
Sjödin, Andreas; Jones, Richard S.; Lapeza, Chester et al

in Organohalogen Compounds (2003), 61

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See detailAuto-associative neural networks, Part II: Feacture extraction for non-linear model updating
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in 8th Internationale Conference on Recent Advances in Structural Dynamics, Southampton, 2003 (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 detailEvaluation of classical NSAIDS on COX-1 and COX-2 purifies enzymes and prognosis of their effects on physiological responses.
De Leval, X.; Henrotin, Yves ULg; Masereel, B. et al

in Fundamental & Clinical Pharmacology (2003), 14

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See detailP2X1-induced activation of Ca2+ calmodulin leads to myosin light chain and ERK2 phosphorylation in human platelets.
Toth-Zsamboki, Emese; Oury, Cécile ULg; De Vos, Rita et al

in Journal of Thrombosis and Haemostasis [=JTH] (2003)

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See detailDétermination du régime hydrodynamique dans une colonne à bulles par tomographie électrique résistive
Marchot, Pierre ULg; Fransolet, Emmanuelle; L'Homme, Guy ULg et al

in Legrand, J. (Ed.) Récents Progrès en Génie des procédés - N°90 - Du rayonnement scientifique à la diffusion des technologies - Actes du 9ème Congrès de la Société Française de Génie des Procédés, 9-11 septembre 2003, Saint-Nazaire, France (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 detailPreparation and characterization of xerogel catalyst microspheres
Alié, Christelle ULg; Ferauche, Fabrice; Heinrichs, Benoît ULg et al

Conference (2003)

For easier handling and use in fixed bed reactors, Pd-Ag/SiO2 aerogel-like xerogel catalysts were shaped into microspheres using the microencapsulation process developed by BRACE GmbH. Before the bead ... [more ▼]

For easier handling and use in fixed bed reactors, Pd-Ag/SiO2 aerogel-like xerogel catalysts were shaped into microspheres using the microencapsulation process developed by BRACE GmbH. Before the bead production process, the xerogel catalyst was ground in water and mixed with ethylene glycol and sodium alginate, the latter of which is the gelation agent. The beads were formed at a vibrating nozzle and solidified during their fall in a water tank containing calcium ions, which induce cross-linking of the alginate and consequent bead hardening. Preliminary work was done using a syringe instead of the material-consuming BRACE unit. The beads were made from a suspension of dried only, dried and calcined, or dried, calcined, and reduced catalyst. The textural properties of the beads were analyzed by nitrogen adsorption-desorption isotherms and mercury porosimetry; and bead catalytic activity was tested for selective hydrodechlorination of 1,2-dichloroethane. The beads made from a suspension of dried catalyst appear to have properties the closest to that of the xerogel reference catalyst. Porosity and surface area are maintained at their level before bead formation. However conversion of 1,2-dichloroethane decreases after the production process, possibly due to poisoning by calcium ions. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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See detailA spectroscopic determination of singlet oxygen quantum yield of PPME in different solvents
Heyne, B.; Russo, C.; Delanaye, L. et al

Conference (2003)

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See detailLa motivation pour la lecture, au-delà d'une simple question de goût
Schillings, Patricia ULg

in Caractères (2003), 10(1), 11-12

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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 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 detailLa violence des jeunes en regard des nouvelles socialisations
Born, Michel ULg

in Violence juvénile : nouvelles formes et stratégies locales - expériences à l'est et à l'ouest (2003)

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

in Proceedings of the STESSA 2003 Conference (2003)

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See 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 detailUn nouveau schéma d'intégration conservatif pour des modèles constitutifs hypoélastiques irréversibles.
Noels, Ludovic ULg; Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg

in Potier-Ferry, M.; Bonnet, M.; Bignonnet, A. (Eds.) Actes du Sixième Colloque National en Calcul des Structures (2003)

Ce travail propose une nouvelle évaluation des forces internes pour les modèles constitutifs hypoélastiques irréversibles dans le cadre de la méthode des éléments-finis en grandes transformations. Nous ... [more ▼]

Ce travail propose une nouvelle évaluation des forces internes pour les modèles constitutifs hypoélastiques irréversibles dans le cadre de la méthode des éléments-finis en grandes transformations. Nous démontrons que cette expression des forces internes utilisée avec un schéma d'intégration du point milieu conduit à un algorithme d'intégration consistant avec les lois de la thermodynamique. [less ▲]

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See detailL'Europe gravettienne
Otte, Marcel ULg; Noiret, Pierre ULg

in Desbrosse, René; Thévenin, André (Eds.) Préhistoire de l'Europe. Des origines à l'âge du Bronze (2003)

The Gravettian tradition appears to develop from local Mousterian and different cultures at the beginning of the European Upper Palaeolithic (Chatelperronian in the west, foliate points in the north and ... [more ▼]

The Gravettian tradition appears to develop from local Mousterian and different cultures at the beginning of the European Upper Palaeolithic (Chatelperronian in the west, foliate points in the north and the Streletskaian in the east). New technological characteristics proper to the Gravettian developed in different regions of middle Europe, apparently around the same time: thin, standardised blades, development of small backed armatures. The Gravettian is thus a pan-European phenomenon, extending across middle Europe, but developing locally. Development within the Gravettian is quite complex, with regional areas of expansion of processes varying according to the phase or facies considered. The Moldavian sequence is key to understanding the regional development of the Gravettian. It can be integrated with that of central and eastern Europe. General developmental tendencies appeared here, connecting regional patterns with traditional roots. The Gravettian culture can thus be considered a collection of technological processes probably adopted by diverse ethnic groups which nevertheless were in regular contact. During the Second Pleniglacial, important climatic changes provoked a division between central and western groups, leading to profound differences between south-eastern Europe (Ukraine, the Carpathian region, the Balkans) and western Europe (Solutrean-Magdalenian succession). [less ▲]

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See detailL’espace, l’individu et la territorialisation
Gauthier, Jean-Marie ULg; Bonfils, Serge; Koskas, Alain et al

in Gorot, Jacques; Bucalo-Triglia, Adèle (Eds.) L’espace de la relation : le réel et l’imaginaire (2003)

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See detailTemporal variability of neurography
WANG, François-Charles ULg; Horward, Aain

Poster (2003)

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See detailSynthèse de ligands ditopiques en tant qu’agents de contraste pour l’imagerie de résonance magnétique.
Thonon, David ULg; Paris, Jérôme; Humblet, Jacques et al

Poster (2003)

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See detailLe système accentuel de l'interlangue d'apprenants francophones du néerlandais
Rasier, Laurent ULg

in Mettouchi, A.; Ferré, G. (Eds.) Actes du colloque international "Interfaces prosodiques" (2003)

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

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

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See detailSurface Mapping of the he & SI Distribution of Four B Stars
Briquet, Maryline ULg; Luftinger, Teresa; Aerts, Conny et al

in Astrotomography, 25th meeting of the IAU, Joint Discussion 9, 17 July 2003, Sydney, Australia (2003)

In the framework of a long-term high-resolution spectroscopic monitoring campaign of slowly pulsating B stars we have discovered four spotted mid-B main-sequence stars exhibiting clear line-profile ... [more ▼]

In the framework of a long-term high-resolution spectroscopic monitoring campaign of slowly pulsating B stars we have discovered four spotted mid-B main-sequence stars exhibiting clear line-profile variability of selected He and Si lines. We derive the rotational period which is of the order of 1-2 days of these stars with a high precision. We perform surface mapping which allows us to derive the distribution of the helium and silicon on the stellar surface. We find evidence for the presence of large spots in all four stars. He overabundance is accompanied with Si underabundance or vice versa in the spots. Our data are usefull to test current diffusion theories which have been developed for spotted A-type stars. Our stars have effective temperatures around 17000K which makes them among the hottest known so far with such clear spotted patterns. It would be most valuable to have magnetic field measurements for the four stars in order to explain the surface element distribution. [less ▲]

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See detailINCIDENCE DE LA METEOROLOGIE LOCALE SUR LES FLUCTUATIONS DE POPULATION DU TETRAS LYRE (TETRAO TETRIX L.)-
Loneux, Michèle ULg; Vandiepenbeeck, Marc

in Publications de l'Association Internationale de Climatologie (2003), 15

Adapté à des climats rudes et des hivers froids et enneigés, le tétras lyre (Petit coq de bruyère Tetrao tetrix. Oiseau Galliforme) a une répartition géographique boréo-montagnarde. Les résultats d'une ... [more ▼]

Adapté à des climats rudes et des hivers froids et enneigés, le tétras lyre (Petit coq de bruyère Tetrao tetrix. Oiseau Galliforme) a une répartition géographique boréo-montagnarde. Les résultats d'une modélisation statistique originale ont montré que les T° minimales et les précipitations locales, enregistrées au cours de certaines périodes cruciales du cycle de vie de l'oiseau, interviennent comme variables explicatives pour reproduire les fluctuations des effectifs annuels recensés depuis 20 et 30 ans en Belgique, Allemagne, Grande-Bretagne et Pays-Bas. Des résultats communs hautement significatifs confirment le rôle négatif des hivers doux et des précipitations pendant la période de reproduction (couvaison et premières semaines des poussins), et le rôle positif des températures chaudes pendant la période d'éclosion des jeunes. La qualité des résultats obtenus, la nature des variables météorologiques impliquées et le contexte de réchauffement climatique global nous ont fait chercher d'éventuelles tendances parmi les variables utilisées. Elles se sont révélées significatives en comparant l'évolution des moyennes standard de températures minimales et de précipitations mensuelles. Les différences dans les précipitations ont d'importantes répercussions biologiques car elles peuvent effectivement nuire à la reproduction et l'hivernage de l'espèce étudiée. Le réchauffement semble donc bien intervenir dans le déclin des populations à long terme, même si le tétras souffre du changement climatique en plus des atteintes anthropiques à son environnement et à sa tranquillité. Pour pallier aux défauts du climat, le gestionnaire prendra des décisions qui améliorent à tous points de vue la qualité, la capacité d'accueil et la tranquillité de l'habitat préféré de cet oiseau afin de favoriser sa conservation à court terme. [less ▲]

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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 detailFinite element analysis of continuous steel casting
Castagne, S.; Pascon, Frédéric ULg; Miesse, G. et al

in Proceedings of the First International Conference Finite element for process analysis (2003)

In order to analyse the behaviour of steel during continuous casting and to improve the process, two complementary models of steel continuous casting using the finite element code LAGAMINE have been ... [more ▼]

In order to analyse the behaviour of steel during continuous casting and to improve the process, two complementary models of steel continuous casting using the finite element code LAGAMINE have been developed. We propose here a description of both macroscopic and mesoscopic approaches. The first one 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 the grain scale. Results concerning the optimisation of the mould taper and the analysis of transverse cracks initiation are presented as industrial applications. [less ▲]

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See detailMultifunctionality : realities and local stakes construction
Vanloqueren, Gaetan; Stassart, Pierre M ULg; Baret, Philipppe

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

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

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See detailCandidate VLTI Configurations for the GENIE Nulling Experiment
Absil, Olivier ULg; Gondoin, P.; Erd, C. et al

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

The European Space Agency (ESA) and the European Southern Observatory (ESO) initiate a definition study for a Ground-based European Nulling Interferometer Experiment (Darwin-GENIE). The experiment will ... [more ▼]

The European Space Agency (ESA) and the European Southern Observatory (ESO) initiate a definition study for a Ground-based European Nulling Interferometer Experiment (Darwin-GENIE). The experiment will use the Very Large Telescope Interferometer (VLTI) operating on Mount Paranal (Chile). The objective of GENIE is to gain experience in the manufacture and operation of a nulling interferometer using a design concept and technology representative of the ESA IRSI-Darwin space mission. GENIE will prepare the IRSI-Darwin science program through a systematic search for exozodiacal dust clouds around IRSI-Darwin candidate targets. GENIE also aims to perform IRSI-Darwin related science achievable from ground including the detection of low-mass companions (if possible, hot jupiters) around nearby stars. Among the variety of telescope sizes and positions on the VLTI site, candidate interferometric configurations have been identified for GENIE, taking into account the limitation imposed by the Earth's atmosphere. They include a Bracewell interferometer for exozodiacal clouds detection in the N band and a double Bracewell configuration with internal modulation for extrasolar jupiter detection in the L' band. The present paper presents the prospective performance of these configurations in light of current specifications of major VLTI subsystems. [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 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 detailExpression dans le double mutant levurien msb3msb4 de 2 gènes humains homologues
Bizimungu, Christelle; Burny, Arsène; Portetelle, Daniel ULg et al

Poster (2003)

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See detailDes indicateurs d'équité : une question de point de vue
Baye, Ariane 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 detailHydrogen peroxyde in breath condensate as marker of lower airway inflammation in an experimental model of feline asthma
Kirschvink, Nathalie; Malin, D.; Delvaux, Francois et al

Conference (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 detailFengycin penetration into a DPPC monlayer: a study using the Langmuir trough technique with the Brewster angle microscopy
Deleu, Magali ULg

in International symposium on surface and colloid chemistry for the life sciences (2003)

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See detailNew ruthenium catalysts bearing N-heterocyclic carbene ligands in Kharasch chemistry
Tudose, Adriana; Delfosse, Sébastien; Richel, Aurore ULg et al

Poster (2003)

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See detailStudy of a method of scale reduction to test sign legibility in fog.
Dore, J.; Colomb, M.; Cavallo, V. et al

Conference (2003)

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See detailRight ventricular diastolic function in acute pulmonary embolism
Morimont, Philippe ULg; segers, P.; Ghuysen, Alexandre ULg et al

Poster (2003)

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See detailDer Einsatz neuer Medien in der regelungstechnischen Ausbildung
Schumm, Peter; Bullinger, Eric ULg; Schweickhardt, Tobias et al

in Proceedings of GMA-Kongress (2003)

This paper reviews the use of new media for teaching of control engineering.

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See detailCassini UVIS and HST STIS Time-Resolved Jupiter Auroral Data Compared to QP Radio Bursts
Pryor, W.; Hospodarsky, G.; Stewart, I. et al

Poster (2003)

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Jupiter in a 4-sec integration "high time-resolution mode" on Jan 8, 13-14, and 20-21 in 2001. In this mode Extreme-Ultraviolet and Far ... [more ▼]

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Jupiter in a 4-sec integration "high time-resolution mode" on Jan 8, 13-14, and 20-21 in 2001. In this mode Extreme-Ultraviolet and Far-Ultraviolet spectra were obtained with reduced spectral and spatial resolution in order to study rapid variations in H2 band and H Lyman alpha emission. Previous work has shown that the region inside Jupiter's main auroral ovals contains highly variable spots of emission (auroral flares) that persist for typically 1 or 2 minutes. This duration is similar to that in Jupiter's quasi-periodic (QP) radio bursts. We compare UVIS data to simultaneous Galileo Plasma Wave Subsystem (PWS) and Cassini Radio and Plasma Wave Subsystem (RPWS) observations. Jan 8 was an active period for UV variability, that we associate with polar auroral flares. There is a correlation between the radio and UV bursts in this period, suggesting that they are related phenomena. We will also explore coordinated Hubble Space Telescope Imaging Spectrograph (STIS) time-tagged UV images from Dec 14 and Dec 16, 2000, and Jan 13-14, and Jan 20-21, 2001 to study the spatial properties of the auroral flares. The auroral emissions inside the main oval were most prominent in the Dec 14, 2000 HST data. We acknowledge support from the Cassini Project, the Space Telescope Science Institute, and the NASA OSS Minority University Initiative. [less ▲]

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See detailEntomopathogenic activity of Beauveria bassiana against Psoroptes cuniculi
Lekimme, M.; Mignon, Bernard ULg; Tombeux, S. et al

Poster (2003)

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See detailVariable Blue Stragglers and the EASE Scenario
Noels-Grötsch, Arlette ULg; Scuflaire, Richard ULg; Magain, Pierre ULg et al

in Thompson, M. J.; Cunha, M. S.; Monteiro, M.J.P.F.G. (Eds.) Asteroseismology Across the HR Diagram (2003)

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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 detailEstimation of genetic parameters for test-day records of French Holstein cows with an AI-REML algorithm
Druet, Tom ULg; Jaffrézic, F.; Ducrocq, V.

in Abstracts from the 2003 ADSA/ASAS joint annual meeting (2003)

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