References of "Scientific congresses and symposiums"
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See detailInfluence of P-glycoprotein on the tissue distribution in rats of the 5-HT1A antagonist p-[18F]MPPF.
Plenevaux, Alain ULg; Lacan, G.; Defraiteur, C. et al

in Society for Neuroscience / Abstracts (2002)

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See detailInvestigation of the biological activity in MSW landfills under dry climates (Tunisia and Haiti)
Hiligsmann, Serge ULg; Lardinois, M.; Rodriguez, C. et al

in Kocasoy, G.; Atabarut, T.; Nuhoglu, I. (Eds.) Appropriate environmental and solid waste management and technologies for developing countries (2002)

This paper presents the results of the investigations carried out over two years (April 2000 – February 2002) to quantify the biological activity that develops in four municipal solid waste landfills ... [more ▼]

This paper presents the results of the investigations carried out over two years (April 2000 – February 2002) to quantify the biological activity that develops in four municipal solid waste landfills located in different regions of two dry climate countries i.e. Haiti and Tunisia. Since the climatic water balance is negative (potential evapotranspiration being 1.5 to 5 times higher than rainfall), it has often been considered that this kind of landfill has neither environmental impact nor efficient biological activity. However, after five campaigns of sampling and analysis at different seasons, the results of the investigations show a relatively stable biological activity in the four landfills with biogas often containing more than 60 percent of methane. Indeed, under the upper waste layer that was effectively dry (dry weight from 85 to 98 %), the core of refuse contained between 35 and 65 % of dry matter. In some boreholes, the produced gases periodically expelled leachates like small geysers. Therefore, the results assert that landfill management in countries with dry climate should be considered with adapted technologies, not necessary the same as under temperate or humid climates. [less ▲]

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See detailDistribution du genre Leclercqia au Dévonien: implications paléogéographiques.
Meyer-Berthaud, Brigitte; Gerrienne, Philippe ULg; Fairon-Demaret, Muriel ULg et al

Conference (2002)

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See detailAdvantages of survival analysis in the evolution of reproductive performance in cattle
de Behr, V.; Hornick, Jean-Luc ULg; Cabaraux, Jean-François ULg et al

in Book of abstracts of the 53rd Annual Meeting of the European Association for Animal Production (2002)

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See detailSpectators’ characteristics, expenses and feelings. Comparison between four top level sport events organized in the region of Liège
Lenzen, Benoît; François, Cédric; Jurion, Bernard ULg et al

in Laaksonen, K.; Löppönen, P.; Nykänen, E. (Eds.) et al Book of proceedings of the 10th congress of the European Association for Sport Management. Future of sport management (2002)

A team of researchers collected data from one thousand of spectators attending 10 sport events organized within the region of Liège during the year 1999. Spectators were randomly submitted to an ... [more ▼]

A team of researchers collected data from one thousand of spectators attending 10 sport events organized within the region of Liège during the year 1999. Spectators were randomly submitted to an individual interview. Questions were about four main themes: (1) socio-economic characteristics of spectators; (2) spending; (3) opinion about the sport event; and (4) opinion about the region. [less ▲]

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See detailControl of radical reactions by bimetallic systems
Richel, Aurore ULg

Conference (2002)

The original application of ruthenium-titanium bimetallic systems either in ATRP or in Kharasch addition (ATRA) is presented

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See detailA Methodology for Updating Large Scale Ortho-Photomaps by Means of VHR Satellite imagery
Donnay, Jean-Paul ULg; Seba, Gautier; de Béthune, Stanislas et al

in Maktav, Derya; Jürgens, Carsten; Erber Sunar, Filiz (Eds.) et al Proceedings of the 3d International Symposium of Remote Sensing of Urban Areas (2002)

Some authorities (DGPL) of the Walloon Region (Belgium) are involved in the realization of a complete regional coverage (16,844 km²) of natural colour ortho-photomap to be used at large scales (up to 1 ... [more ▼]

Some authorities (DGPL) of the Walloon Region (Belgium) are involved in the realization of a complete regional coverage (16,844 km²) of natural colour ortho-photomap to be used at large scales (up to 1:4000). These are made of very high-resolution digital ortho-rectified aerial photos presented as raster files. Those rasters are grouped by corresponding administrative boundaries and distributed to the local authorities in order to be used for various land and urban planning purposes. One goal of the DGPL is to provide the local administrations with up to date image data, within the limits of some obvious financial constraints. Because significant changes in the landscape appear at different rates over the time and space, it was suggested to devise a methodology to find out these changes would require a rapid update of the imagery. In regard to this situation, a pilot project has been set up in the year 2000 aiming at detecting the location, the extent and the nature of landscape changes in contrasted areas - urban, suburban, rural - from adequately processed very high resolution (VHR) satellite images - typically Ikonos multi-spectral (4m) and panchromatic (1m) images. Hence, this project had to cope with various issues related to multi-source analysis, geometric and radiometric aspects of the processing VHR data, diachronic analysis, in order to provide the administration with the basic knowledge and the appropriate tools to carry out the proposed task. This communication presents the proposed operational methodology for change detection including all processing steps from the digital image processing (image fusion technique, ortho-rectification analysis, change detection schemes). Along the way it also introduces an assessment of the possible complementarities and convergence of VHR satellite imagery and aerial photography. [less ▲]

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See detailModulation of dendritic cell phenotype by PGD2 and PGJ2 : consequence on the orientation of T helper response
Gosset, P.; Bureau, Fabrice ULg; Angeli, V. et al

in Proceedings : International Conference of the American Thoracic Society (2002)

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See detail3D h-phi finite element formulation for the computation of a linear transverse flux actuator
Deliège, Geoffrey ULg; Henrotte, François; Vande Sande, Hans et al

in 15th International conference on electrical machines (ICEM), Brugge, Belgium, August 25-28, 2002 (2002)

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See detailCyclopentenone prostaglandins at low concetrations exert pro-inflammatory effects through oxidative stress-induced ERK1/2 activation
Bureau, Fabrice ULg; Desmet, Christophe ULg; Mélotte, C. et al

in Proceedings: Spring Meeting of the Belgian Society of Physiology and Pharmacology (2002)

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See detailSex differences in the distribution of the steroid receptor-coactivator-1 in the canary brain
Charlier, Thierry ULg; Ball, Gregory F; Balthazart, Jacques ULg

in Hormones & Behavior (2002), 41

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See detailMetallicity Gradients in Globular Cluster Systems : the Trace of a Self-Enrichment Process ?
Parmentier, G.; Magain, Pierre ULg; Noels-Grötsch, Arlette ULg et al

in Geisler, E. K.; Grebel, E.; Minniti, D. (Eds.) Extragalactic Star Clusters (2002)

We have developed a model of globular cluster self-enrichment, based on the ability of the globular cluster gaseous progenitors to retain the ejecta of a first generation of Type II Supernovae. The key ... [more ▼]

We have developed a model of globular cluster self-enrichment, based on the ability of the globular cluster gaseous progenitors to retain the ejecta of a first generation of Type II Supernovae. The key point is that this ability depends on the pressure exerted on the progenitor cloud by the surrounding protogalactic medium and therefore on the location of the cloud in the protogalaxy. The model is able to explain the galactic halo metallicities and the metallicity gradient of the Old Halo which is thought to be the genuine galactic globular cluster system. The possibility that metallicity gradients are a common property of extragalactic globular cluster systems is also presented. [less ▲]

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See detailEarly eukaryotic diversification
Javaux, Emmanuelle ULg; knoll, A. H.; Walter, M.

Conference (2002)

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See detailThe Middle Devonian plant Leclercqia (Lycopsida) in eastern Gondwana
Meyer-Berthaud, B.; Fairon-Demaret, Muriel ULg; Steemans, Philippe ULg et al

Conference (2002)

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See detailRuthenium alkylidenes : a new class of catalysts for Kharasch addition and controlled radical polymerisation of vinyl monomers
Richel, Aurore ULg; Delfosse, Sébastien; Demonceau, Albert ULg et al

Poster (2002)

Air-stable and readily available ruthenium benzylidene complexes of the general type [RuCl2(=CHPh)(L)(L’)] (L, L’ = PCy3 and/or N-heterocyclic carbene) constitute a new class of catalyst precursors for ... [more ▼]

Air-stable and readily available ruthenium benzylidene complexes of the general type [RuCl2(=CHPh)(L)(L’)] (L, L’ = PCy3 and/or N-heterocyclic carbene) constitute a new class of catalyst precursors for atom-transfer radical polymerisation (ATRP) of methyl methacrylate and styrene, and provide an unprecedented example for the involvement of ruthenium alkylidenes in radical reactions. They promote the polymerisation of various monomers with good to excellent yields, and in a controlled way with methyl methacrylate and styrene. The ligand L (PCy3 and/or N-heterocyclic carbene) turned out to play a particularly important role in determining the rate of the polymerisations. A similarly pronounced influence is exerted by the substituents on the N-heterocyclic carbene. Our results indicate that the catalysts decompose quickly under ATRP conditions, and polymerisations are mediated by both [RuCl2(=CHPh)-(L)(L’)] complexes and ruthenium species bereft of the benzylidene moiety. In addition, investigation on the reaction of metathesisable olefins such as styrene in the presence of carbon tetrachloride also exemplify the dual activity of ruthenium alkylidene complexes for radical reactions and olefin metathesis. [less ▲]

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See detailCold adapted endoglucanase from Antarctic bacteria
Sonan, Guillaume; Feller, Georges ULg; Gerday, Charles ULg

Poster (2002)

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See detailLanthanide DOTA chelates bearing a methanethiosulfonate group as contrast agents for magnetic resonance imaging
Thonon, David ULg; Paris, Jérôme; Jacques, Vincent et al

Poster (2002)

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See detailAnalyse des potentialités du transport fluvial dans un marché multimodal et intermodal
Marchal, Jean ULg; Zhang, Zhaomin; Marchal, Jean-Christophe ULg

in Revue PIANC (2002)

L’article identifie en profondeur les facteurs déterminants, et l’ampleur de leur influence, relatifs à une utilisation plus intensive du mode de transport fluvial et au concept de développement durable ... [more ▼]

L’article identifie en profondeur les facteurs déterminants, et l’ampleur de leur influence, relatifs à une utilisation plus intensive du mode de transport fluvial et au concept de développement durable. Il est donc important de comprendre quelles sont les barrières qui empêchent le glissement de marchandises de la route vers la voie d’eau sur le réseau belge où des conditions spécifiques économiques, administratives, organisationnelles, politiques et d’infrastructure existent. Il est aussi fondamental d’être attentif aux facteurs relatifs à la capacité du mode fluvial à s’intégrer dans des chaînes de transport intermodales. L’article se subdivise en trois parties, à savoir : - possibilités de glissement de marchandises sur les corridors fluviaux belges. - obstacles au glissement. - conditions préalables au glissement; exigences nécessaires pour une pleine intégration de la navigation intérieure dans les chaînes intermodales de transport; proposition de mesures concrètes. [less ▲]

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See detailFond géochimique des sols : intérêt et possibilités de la spectrométrie de Fluorescence X (XRF)
Marcoen, Jean Marie ULg; Naud, J.; Brohée, J.-C. et al

in Actes du séminaire de Rabat (2002)

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See detailExplorations neurophysiologiques des Myotonies
WANG, François-Charles ULg

Conference (2002)

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See detailLethal white foal syndrome – Revue de la littérature à partir de 2 cas cliniques
Sandersen, Charlotte ULg; Delguste, Catherine ULg; Cassart, Dominique ULg et al

in Proceedings of the Annual meeting of the French Equine Veterinary Association (AVEF) (2002)

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See detailCalcium-vitamin D supplementation in clinical trials of osteoporosis should be titrated on the basis of pre-study assessments
Reginster, Jean-Yves ULg; Diez-Perez, A.; Ortolani, S. et al

in Osteoporosis International (2002), 13(S1), 24

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See detailLe Secret des Géants
Beckers, Albert ULg

in Conférence sur invitation : Cotonou - Bénin, 02 au 04 décembre 2002 - Abstract book (2002)

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See detailRôle du gène cap-like dans la répression catabolique chez Streptomyces
Derouaux, Adeline ULg; Giannotta, Fabrizio; Rigali, Sébastien ULg et al

Conference (2002)

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See detailEnhanced Platelet Reactivity to Collagen and Shear Stress in Transgenic Mice Overexpressing the Platelet P2X1 Ion Channel
Oury, Cécile ULg; Kuijpers, Marijke; Toth-Zsamboki, Emese et al

in Blood (2002), 100

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See detailCD40 engagement enhances eosinophil survival through induction of cellular inhibitor of apoptosis protein 2 expression: possible involvement in allergic inflammation
Bureau, Fabrice ULg; Seumois, G.; Jaspar, F. et al

in Pflügers Archiv : European Journal of Physiology (2002), 443

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See detailNF-kB activity, and IL-8 and GM-CSF expression, in the milk of chorionic mastitis-affected cows
Boulanger, Delphine; Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Pflügers Archiv : European Journal of Physiology (2002), 443

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See detailOptical Spectroscopy of Colliding-Wind Systems to be Observed with XMM
Sana, H.; Rauw, Grégor ULg; Gosset, Eric ULg et al

in Interacting Winds from Massive Stars (2002)

Not Available

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See detailStructure-modifying drugs in osteoarthritis
Reginster, Jean-Yves ULg; Kvasz, Angela ULg

in Osteoporosis International (2002), 13(Suppl. 1), 49-50

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See detailDevelopment of microsatellite markers for the characterisation of Phaeoisariopsis griseola (bean angular leaf spot agent) populations in Central America.
Busogoro, Jean-Pierre; Duterme, Olivier; Lepoivre, Philippe ULg

in Plant Protection Science (2002), 38(Special 1),

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See detailBases de la lutte phytosanitaire et des Bonnes Pratiques
Schiffers, Bruno ULg

in Normes de Qualité phytosanitaire dans le secteur des fruits et légumes (2002)

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See detailLeucocyte subsets in the respiratory tract of dogs without respiratory disease : preliminary results.
Peeters, Dominique ULg; Day, M. J.; Laurent, A. et al

in Proceedings of the 12th Annual Congress of the ECVIM-CA (2002)

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See detailLes crises alimentaires et les systèmes de prévision au Sahel
Andrea, Di vecchia; Patrizio, Vignaroli; Djaby, Bakary ULg

Conference (2002)

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See detailTexture analysis of cylindrical cup during deep-drawing process
Flores, Paulo; Duchene, Laurent ULg; Habraken, Anne ULg

in Yang, D. Y.; Oh, S. I.; Huh, H. (Eds.) et al Proceedings of the 5th international conference NUMISHEET 2002 (2002)

This paper presents the simulation of a deep-drawing process using three different constitutive laws: strain rate space yield locus description with an isotropic hardening law, strain rate space yield ... [more ▼]

This paper presents the simulation of a deep-drawing process using three different constitutive laws: strain rate space yield locus description with an isotropic hardening law, strain rate space yield locus description with a combined (isotropic and kinematic) hardening law, and stress space yield locus description with an isotropic hardening law. To take into consideration material anisotropy, the yield locus is computed from the crystallographic texture using Taylor's model, a dual plastic potantial and combined hardening law taking into account the dislocations microstructures. The results obtained by these three constitutive laws are compared with experimental ones. [less ▲]

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See detailFinite element thermo-mechanical model of continuous steel casting
Pascon, Frédéric ULg; Habraken, Anne ULg

in Kiuchi, M.; Nishimura, H.; Yanagimoto, J. (Eds.) Proceedings of the 7th International Conference on Advanced Technology of Plasticity (2002)

Problems in continuous casting of steel are numerous and have been leading producers to find ever more efficient solutions. Wa have developed a thermomechanical model of continuous casting, using a non ... [more ▼]

Problems in continuous casting of steel are numerous and have been leading producers to find ever more efficient solutions. Wa have developed a thermomechanical model of continuous casting, using a non-linear finite element code. Since a complete 3D discretization seemed impossible, the model has been based on a generalized plane strain state (2D1/2) and it includes at the same time thermal exchanges, mechanical behaviour of steel at very high temperature, the ferrostatic pressure and contact between the strand and the machine. This paper presents some results of two industrial applications. First results tend to prove the importance of some process factors (such as the mould taper) and local defects of the machine on the quality of cast products, according with observations. [less ▲]

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See detailRelevance of molecular biology to Psychopharmacology
Bettendorff, Lucien ULg

Conference (2002)

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See detailMulti-site quantitative ultrasound measurements of the third metacarpal bone in young thoroughbred horses
Carstanjen, B; Lepage, OM; Langlois, P et al

in Proceedings of the CESMAS congress 2002 (2002)

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See detailIsolation ad Characterization of osteocalcin in horses
Carstanjen, B; Wattiez, R; Amory, Hélène ULg et al

in Proceedings of the ECVS meeting 2002 (Resident Forum) (2002)

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See detailCandidate locus for familial abdominal aortic aneurysms by genome-wide DNA linkage analysis
Shibamura, H.; Buxbaum, S.; Olson, J. M. et al

in Circulation (2002), 106(19, Suppl. S), 168

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See detailSystems Biology - A Glossary from two perspectives
Haubelt, A.; Bullinger, Eric ULg; Sauter, T. et al

Poster (2002)

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See detailAutour d'Henri Bles : le Maître des disciples d'Emmaüs de Liège. Analyses technologiques du Paysage avec les disciples d'Emmaüs (Liège, Musée d'art religieux et d'art mosan)
Oger, Cécile ULg

in Toussaint, Jacques (Ed.) Actes du Colloque organisé dans le cadre de l'exposition : Autour de Henri Bles (2002)

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See detailModeling the Martian ionosphere using the Total Electron Content measurement by the NEIGE/NETLANDER experiment
Morel, Laurent; Witasse, Olivier; Warnant, René ULg et al

in Proceedings of the XXVII URSI General Assembly (2002)

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See detailA quoi sert le diplome universitaire en Afrique?
Rubbers, Benjamin ULg

Conference (2002)

Detailed reference viewed: 36 (2 ULg)
See detailCapabilities and Limitations of Structures in Fire Modelling
Franssen, Jean-Marc ULg

in Proc. Intl Symposiuml on Structures in Fire - Issues an concerns after September Eleventh (2002)

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See detailEvolution of serum vitamine E concentration in horses living in a stable affected by equine motor neurone disease (EMND).
Delguste, Catherine ULg; de Moffarts, Brieuc; Sandersen, Charlotte ULg et al

in Proceedings of the 41st Annual Congress of the British Equine Veterinary Association (BEVA) (2002)

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See detailComment répondre aux nouvelles demandes des entreprises et des ménages dans le cadre des structures spatiales de la Wallonie ?
Merenne-Schoumaker, Bernadette ULg

in Actes du Colloque CPDT (2002)

Forward thinking and realistic in terms of location of activities and accommodation for a new territorial development strategy in Wallonia

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See detailInsert'Prof. Pour un dispositif de formation favorisant une insertion réussie dans la vie professionnelle
Beckers, Jacqueline ULg; Andrianne, Sabine; Bourguignon, Luc et al

in Actes du 2e congrès des chercheurs en éducation (2002)

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See detailEffects on rat pancreatic B-cells and rat aorta rings of 4,6-disubstituted 2,2-dimethylchromans structurally related to the potassium channel opener cromakalim
Sebille, S.; Becker, B.; Antoine, M. H. et al

in Fundamental & Clinical Pharmacology (2002)

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See detailThe Distorted Shape of Jupiter's North Auroral Oval - A Possible Magnetic Anomaly
Clarke, J. T.; Grodent, Denis ULg; Connerney, J.

Poster (2002)

Repeated imaging of Jupiter's aurora has shown that the northern main oval has a distorted "kidney bean" shape in the general range of 40-100 deg magnetic longitude, which appears unchanged since 1994 ... [more ▼]

Repeated imaging of Jupiter's aurora has shown that the northern main oval has a distorted "kidney bean" shape in the general range of 40-100 deg magnetic longitude, which appears unchanged since 1994. More recently, improved accuracy in locating the satellite footprint auroral emissions has provided new information about the geometry of Jupiter's magnetic field in this and other areas. The persistent pattern of the main oval implies a disturbance of the local magnetic field, and the increased latitudinal separation of the locus of satellite footprints from each other and from the main oval implies a locally weaker field strength. It is possible that these phenomena result from a magnetic anomaly in Jupiter's intrinsic magnetic field, as was proposed by A. Dessler in the 1970's. There is presently only limited evidence from the scarcity of auroral footprints observed in this longitude range. Similarly, while it is difficult to observe the conjugate regions in the southern aurora, there does not appear to be any corresponding distortion in the south. We will present the observational evidence that we have accumulated to date, propose future observations to determine the nature of this disturbance, and speculate on its causes and implications. [less ▲]

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See detailA constitutive model for North Sea Chalk. Application to reservoir compaction and to waterflooding
Charlier, Robert ULg; Collin, Frédéric ULg; Schroeder, Christian ULg et al

in Pande, G. N.; Pietruszczak, S. (Eds.) Nomerical models in Geomechanics (2002)

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into ... [more ▼]

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into account these two effects. It is based on frictional – cap elastoplasticity and on the Barcelona unsaturated soil model. Oil – water – chalk interaction is modeled through the suction variable. The two saturating fluids flow is also developed. After implementation into a finite element code, these tools allow to simulate a waterflooding experiment on a chalk sample. The model appears to reproduce qualitatively and quantitatively the experimental results. [less ▲]

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See detailInterface-esquisse effacée en ingénierie de conception
Leclercq, Pierre ULg

in Proceedings de la 14ème conférence francophine sur l'Interaction Homme-Machine IHM'02 (2002)

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See detailMemory for temporal context: Effects of aging and retrieval strategies
Bastin, Christine ULg; Van der Linden, Martial ULg

in Proceedings of the International Conference Binding in Human Memory: A neurocognitive approach (2002)

The purpose of the present study was to re-explore the effects of age on memory for temporal context, assessed by a list discrimination task. Contrary to previous studies, each list (with faces as stimuli ... [more ▼]

The purpose of the present study was to re-explore the effects of age on memory for temporal context, assessed by a list discrimination task. Contrary to previous studies, each list (with faces as stimuli) was associated with a different type of judgement (honesty versus intelligence rating). The results showed no age differences on this task when no particular retrieval strategy was induced. However, when participants were encouraged to retrieve the list of occurrence of the items by retrieving the type of judgement made at encoding, there was an age effect. Older adults’ performance was at chance, whereas younger adults had a good performance. Moreover, younger adults who reported using the strategy performed as well as younger adults who did not use it. These results will be discussed by reference to the distinction between automatic versus effortful encoding processes. [less ▲]

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See detailLe kimbanguisme : une "société" en mutation ?
Melice, Anne ULg

Conference (2001, December 13)

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See detailOptimalisation des apports en acides aminés pour des taurillons BBB en complément à une ration fermière
Beckers, Yves ULg; Froidmont, Eric

Conference (2001, December 12)

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See detailLe rein ischémié
Krzesinski, Jean-Marie ULg

Conference (2001, December 11)

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See detail2-Alkyl-3-alkylamino-2H-benzo- and pyridothiadiazine 1,1-dioxides: Ca++ channel blockers rather than K+ATP channel openers?
De Tullio, Pascal ULg; Becker, B.; Ouedraogo, R. et al

Poster (2001, December 08)

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See detailL'attention dans le vieillissement normal
Adam, Stéphane ULg

in Couillet, J. (Ed.) La Neuropsychologie de l'Attention (2001, December 04)

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See detailImportance of inbterspecific variation for designing conservation strategies in Plants : Centaurea jacea as case study
Vanderhoeven, Sonia ULg; Lefebvre, C.; Hardy, Olivier et al

Poster (2001, December 02)

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See detailTwo types of localized auroral UV emission on the dayside
Frey, H. U.; Mende, S. B.; Immel, T. J. et al

Conference (2001, December 01)

The FUV instrument on IMAGE frequently observes localized ultraviolet emission on the high latitude dayside, poleward of the normal auroral oval. There are two different types of these localized emissions ... [more ▼]

The FUV instrument on IMAGE frequently observes localized ultraviolet emission on the high latitude dayside, poleward of the normal auroral oval. There are two different types of these localized emissions. One is especially distinct in the observations of Doppler shifted Lyman alpha emission from proton precipitation. This type occurs during northward IMF and high solar wind dynamic pressure. We interpret this emission as the optical signature of proton precipitation into the cusp after lobe reconnection at the magnetopause. The second type of localized emission is visible in the wide-band (WIC) and oxygen (SI13) imagers, but is absent in the proton imager. This emission occurs during northward IMF but very low solar wind density and dynamic pressure. We interpret this emission as the optical signature of electron acceleration after reconnection. [less ▲]

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See detailDesign of the Heliospheric Imager for the STEREO mission
Defise, Jean-Marc ULg; Halain, Jean-Philippe ULg; Mazy, Emmanuel ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2001, December 01)

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2005. The two HI instruments will provide stereographic image pairs of solar ... [more ▼]

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2005. The two HI instruments will provide stereographic image pairs of solar coronal plasma and address the observational problem of very faint coronal mass ejections (CME) over a wide field of view (~90 degree(s)) ranging from 13 to 330 R[SUB]0[/SUB]. The key element of the instrument design is to reject the solar disk light, with straylight attenuation of the order of 10[SUP]-13[/SUP] to 10[SUP]-15[/SUP] in the camera systems. This attenuation is accomplished by a specific design of straylight baffling system, and two separate observing cameras with complimentary FOV's cover the wide FOV. A multi-vane diffractive system has been theoretically optimized to achieve the lower requirement (10[SUP]-13[/SUP] for HI-1) and is combined with a secondary baffling system to reach the 10[SUP]-15[/SUP] rejection performance in the second camera system (HI-2). This paper presents the design concept of the HI optics and baffles, and the preparation of verification tests that will demonstrate the instrument straylight performances. The baffle design has been optimized according to accommodation constrains on the spacecraft, and the optics were studied to provide adequate light gathering power and image quality. Straylight has been studied in the complete configuration, including the lens barrels and the focal plane assemblies. A specific testing facility is currently being studied to characterize the effective straylight rejection of the HI baffling. An overview of the developments for those tests is presented. [less ▲]

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See detailChandra/ACIS observation of NGC 346
Nazé, Yaël ULg; Stevens, I. R.; Hartwell, J. et al

in Bulletin of the American Astronomical Society (2001, December 01)

The cluster NGC346 is the largest star formation region in the SMC. It contains a large fraction of the early-type O stars of this galaxy. In the outskirts of this cluster lies HD 5980, a unique system of ... [more ▼]

The cluster NGC346 is the largest star formation region in the SMC. It contains a large fraction of the early-type O stars of this galaxy. In the outskirts of this cluster lies HD 5980, a unique system of massive stars of which one component underwent a LBV-type eruption in 1993. The XMEGA consortium has obtained one deep (100 ks) Chandra exposure of NGC 346. It shows ~70 point sources, of which only half possess an optical counterpart; strong emission from HD 5980; and diffuse emission associated with the cluster and SNR 0057-7226. [less ▲]

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Peer Reviewed
See detailAuroral Precipitation during the Bastille Day Storm Recovery
Immel, T. J.; Mende, S. B.; Frey, H. U. et al

Conference (2001, December 01)

The recovery period following the geomagnetic storm of July 15-16, 2000 is marked by rapid changes in auroral morphology and brightness in the sunlit hemisphere. These observations are made by the FUV and ... [more ▼]

The recovery period following the geomagnetic storm of July 15-16, 2000 is marked by rapid changes in auroral morphology and brightness in the sunlit hemisphere. These observations are made by the FUV and EUV imagers aboard the IMAGE satelite. Clear signatures of magnetospheric convection are observed in the motion of the auroral forms, indicating sunward convection of plasma in the polar cap under the strong northward component of the IMF. Precipitation is also observed equatorward of the auroral oval on the dayside in large diffuse arcs. Unlike previously observed detached proton arcs, this precipitation appears to have a significant electron component. Determination of the characteristic energies and fluxes of electrons and protons requires the proper removal of FUV airglow emissions, which in this case have been strongly affected by the recent magnetic activity. EUV images provide a very clear signature of these events, with practically no airglow contamination. With proper modeling, these EUV images could provide improvements to the characterization of the magnetospheric energy input to the thermosphere and ionosphere from space-based imaging. [less ▲]

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See detailComparative In Vitro Activity of Amphotericine B, Itraconazole, Voriconazole and Posaconazole against Aspergillus fumigatus
Hayette, Marie-Pierre ULg; Amadore, Agatha; Seidel, Laurence ULg et al

Poster (2001, December)

Background. New azoles have been successfully used as treatment of invasive aspergillosis. The purpose of this study was to compare the in vitro activity of posaconazole (Posa) with that of amphotericin B ... [more ▼]

Background. New azoles have been successfully used as treatment of invasive aspergillosis. The purpose of this study was to compare the in vitro activity of posaconazole (Posa) with that of amphotericin B (AmB), itraconazole (Itra) and voriconazole (Vor) against A. fumigatus isolates according to NCCLS method (M38-P), and to compare visual and spectrophotometric readings for MIC determination. Methods. A total of 106 A. fumigatus isolates were selected as follows: 88 clinical isolates from colonized patients, 18 from patients with invasive aspergillosis and 7 environmental isolates. Their in vitro susceptibility was evaluated by the NCCLS microdilution method (M38-P) in RPMI 1640 medium. Determination of results was made by visual and spectrophotometric readings (630 nm) after 48 hours incubation at 35 degreesC. Three A. fumigatus reference strains (IHEM 5734, 6149 and 13935) were included as control. Results. 1. Geometric mean MICs/MIC90 (microg/ml) obtained by visual reading were respectively 0.66/1 (AmB), 0.37/0.5 (Itra), 0.27/0.5 (Vor) and 0.02/0.03 (Posa). 2. MIC values were comparable by spectrophotometric and by visual readings for all antifungal agents tested (p>.05) and did not depend on the isolates origin (p>.05). 3. Posaconazole had the lowest MICs (p< 0.001). 4. The itraconazole-resistant reference strain did not give cross resistance with voriconazole and posaconazole. CONCLUSIONS: Among azoles, posaconazole had a better in vitro activity against A. fumigatus than did voriconazole or itraconazole. Spectrophotometric reading could replace the less standardized visual reading for NCCLS microdilution method and MIC values obtained were comparable among all A. fumigatus isolates. [less ▲]

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See detailImpact studies and water management with WolfHydro : a new physically based hydrological solver
Archambeau, Pierre ULg; Mouzelard, Thibaut; Erpicum, Sébastien ULg et al

in International Symposium on Environmental Hydraulics (2001, December)

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See detailOsmium (VI) – selenoxyde and selenide – osmium (VIII) : A Perfect Couple of Reagents
Colaux, Catherine ULg; krief, Alain

Poster (2001, December)

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See detailGlobal analysis of a continuous-time flow whith computes time-optimal switchings
Grognard, F.; Sepulchre, Rodolphe ULg

in Proceedings of the 40th IEEE Conference on Decision and Control (2001, December)

The minimum-time bounded control of linear systems is generically bang-bang and the number of switchings does not exceed the dimension of the system if the eigenvalues of the system matrix are real. This ... [more ▼]

The minimum-time bounded control of linear systems is generically bang-bang and the number of switchings does not exceed the dimension of the system if the eigenvalues of the system matrix are real. This paper proposes a synthesis method for such problems based on dynamical systems that "compute" the optimal sequence of switching times. [less ▲]

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See detailGroup B Streptococcal infections in Belgium
MELIN, Pierrette ULg

Conference (2001, December)

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See detailFacteurs de risque et conduites à tenir lors de mortalité embryonnaire
Hanzen, Christian ULg

Conference (2001, December)

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See detailEffects of BM-573, a dual thromboxane A2 receptor antagonist and thromboxane synthase inhibitor, on osteogenic sarcoma cell-induced platelet aggregation
De Leval, X.; David, J. L.; Neven, P. et al

Poster (2001, December)

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See detailDe bijdrage van de organisatiesociologie tot het begrijpen van het functioneren van justitie
Schoenaers, Frédéric ULg

in toekomst van rechtssociologie in het justitiële beleid (2001, December)

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See detailMulticriteria and multiactors interactive tool aiding to sketch the building envelope during the first stages of the architectural design, with objective of cost and energy performances
Hauglustaine, Jean-Marie ULg

in Performance of Exterior Envelopes of Whole Buildings VIII: Integration of Building Envelopes (2001, December)

The present study explores a Multiple Criteria Decision Aid (MCDA) procedure, an aid to help project authors optimise the building envelope during the sketch design, where a significant number of choices ... [more ▼]

The present study explores a Multiple Criteria Decision Aid (MCDA) procedure, an aid to help project authors optimise the building envelope during the sketch design, where a significant number of choices are fixed, having a determining impact on the future building cost and use. The objective of the design method is the respect of building costs – for the building construction and use – and the energy performance improvement. An interactive tool has been developed within multicriteria and multiactors context. In order to improve the architectural response to the client’s and regulation requirements, it gives decision-making aids to: - the project authors: in making up the project architectural forces, in accordance with the actors’ objectives; - the client: in reaching his objectives of costs, building duration, comfort and functionality, while serenely assuming his responsibilities related to his building energy and environment performances. The design tool is organised in two linked modules, any actor may go in any module in any time: - the first one manages parameters describing the project requirements; - the graphic module allows to draw the sketch; it calculates geometric parameter values that it puts back in the first module. Permanently informed on cost and energy performances, the user can any time search for optimal scenario giving best satisfaction or compromise: he has at his disposal at lot of graphs illustrating the performance sensitivity to parameter variation, as well as an optimisation procedure using a genetic algorithm to find the most efficient parameter set. The software is organised to manage new building projects of housings, schools and offices (small to medium size projects). [less ▲]

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See detailGroup B Streptococcal Infections in Belgium
MELIN, Pierrette ULg

Conference (2001, November 30)

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See detailLa bonne gouvernance, de la mondialisation à l’Europe des Régions
Hermans, Michel ULg

Conference (2001, November 27)

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See detailL'annonce du diagnostic en post-partum: un moment toujours douloureux
Battisti, Oreste ULg

Conference (2001, November 23)

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