References of "Scientific congresses and symposiums"
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See detailThe usefulness of VHR images for public administrations in an urban hilly region
Binard, Marc ULg; Cornet, Yves ULg; Donnay, Jean-Paul ULg

in Marçal, André (Ed.) "Global Developments in Environmental Earth Observation from Space" (2006)

This paper presents some results of the SPIDER project currently achieved in and around the city of Liège located in a hilly landscape. A Quick Bird image bundle product acquired on the 26th September ... [more ▼]

This paper presents some results of the SPIDER project currently achieved in and around the city of Liège located in a hilly landscape. A Quick Bird image bundle product acquired on the 26th September 2003 is used. Digital spatial data like Very High Resolution (VHR) satellite images could be provided to the public authorities of the Walloon region thanks to the Walloon cartographic gateway. In urban context and especially in hilly region, such images must be orthorectified using a Digital Surface Model (DSM). A 1 m resolution DSM was elaborated by exploiting all the 3D data available in the study area. Firstly, a TIN was generated from vector data (points, lines and polygons) selected, on the one hand, from the 1:50 000 (DTED-WGS) and the 1:10 000 (DTM- 10000, Top10v-GIS) cartographic database provided by the Belgian NGI and, on the other hand, from the 1:1 000 3D topographic database of the Walloon region (PICC). Then the TIN was rasterised and the DSM airborne LIDAR acquired along the main river-valleys is superimposed on the result. The ortho-image was then produced. The public authorities consider it as an end-product by itself which could be used in the place of the obsolete aerial orthophotos in the fast changing urban areas. Normally, the ortho-image of Liège should be available on the map server of the Walloon region in 2005, in order to check its usefulness for local and regional authorities. Moreover the local planning agency wish to take the opportunity of this study to update the spatial databases covering industrial and business development areas delineated on the urban plan. [less ▲]

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See detailBone Formation around Immediately Loaded Implants: a Bone Chamber Model
Vandamme, K.; Naert, Ignace; Geris, Liesbet ULg et al

in Proceedings of the 84th General Session & Exhibition of the IADR (2006)

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See detailAutomatic learning of sequential decision strategies for dynamic security assessment and control
Wehenkel, Louis ULg; Glavic, Mevludin; Geurts, Pierre ULg et al

in Proceedings of the IEEE Power Engineering Society General Meeting 2006 (2006)

This paper proposes to formulate security control as a sequential decision making problem and presents new developments in automatic learning of sequential decision making strategies from simulations and ... [more ▼]

This paper proposes to formulate security control as a sequential decision making problem and presents new developments in automatic learning of sequential decision making strategies from simulations and/or information collected from real-life system measurements. The exploitation of these methods for the design of decision making strategies and control policies in the context of preventive and emergency mode dynamic security assessment and control is discussed and further opportunities for research in this area are highlighted. [less ▲]

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See detailComparison of noise, hot and cold contrast of eight tomographic camera models.
Seret, Alain ULg; Nguyen, Thibaut

in European Journal of Nuclear Medicine and Molecular Imaging (2006), 33(S2), 282

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See detailRole of Sox 10 in the development of the inner ear
Bodson, M; Breuskin, I; Thelen, Nicolas ULg et al

Poster (2006)

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See detailColour removal from wastewater by means of microbial treatment
Janeczko, M.; Georgiev, P.; Nicolova, M. et al

in Fecko, P. (Ed.) 10-th Conference on Environment and Mineral Processing (2006)

Water solutions of different dyes used in textile industry (Reactive Black 5, Acid Orange 7 and Disperse Yellow 5) were treated under laboratory conditions by means of different microorganisms or their ... [more ▼]

Water solutions of different dyes used in textile industry (Reactive Black 5, Acid Orange 7 and Disperse Yellow 5) were treated under laboratory conditions by means of different microorganisms or their metabolites. The following organisms were used in this study: Bacillus megatherium, B.subtilus, B.circulans, activated sludge from industrial w. w. teratment plant and a mixed enriched culture of flocculating bacteria. It was find out that the microbial effect towards the dyes was quite specific and the extent of colour removal varied in broad range. Very good results were achieved also by means of permeable reactive barriers inhabitated by flocculating bacteria and other independent microorganisms and operating under continuous flow conditions. The colour removal in these case varied in the range of about 80 - 90 % and was similar to that achieved by the well known chemical reagents used in the textile industry. [less ▲]

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See detailEtude de faisabilité pour la création d'une structure de transformation du lait
Duquesne, Brigitte ULg; Frameree, C.; Demeffe, L. et al

in 11ème Carrefour des Productions animales "le lait... une filière dynamique" (2006)

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See detailInvestigation of blood oxidant/antioxidant markers in healthy competition horses : effect of discipline and gender.
Kirschvink, N.; De Moffarts, Brieuc; Farnir, Frédéric ULg et al

in 7th International Conference on Equine Exercise Physiology (2006)

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See detailEffects of long-term population fluctuations in a top predator on invertebrate community composition in Alpine ponds
Wissinger, Scott; Whiteman, Howard; Denoël, Mathieu ULg

Conference (2006)

At our remote study site in central Colorado, the population size of tiger salamanders (Ambystoma tigrinum nebulosum) has fluctuated cyclically over the past 20 years from fewer than 100 to over 5000 ... [more ▼]

At our remote study site in central Colorado, the population size of tiger salamanders (Ambystoma tigrinum nebulosum) has fluctuated cyclically over the past 20 years from fewer than 100 to over 5000 individuals. Comparative data between ponds with and without salamanders, and experimental studies suggest that this species is a keystone predator on benthic and planktonic prey communities. Here we present long-term community data that reveal taxon- and habitat-specific correlations in the population size of benthic and planktonic prey with fluctuations in salamander populations. Changes in the abundance of planktonic, but not benthic invertebrates in temporary habitats were correlated with fluctuations in the abundance of salamanders. In permanent ponds, we observed order-of-magnitude changes in benthic biomass that are negatively correlated with salamander abundance. Among the large-bodied and potentially most vulnerable benthic invertebrates (odonates, caddisflies, beetles, water bugs), several species exhibited negatively coupled cycles, but others fluctuated little or out of phase with changes in salamander abundance. The absence of major shifts in benthic community composition in permanent ponds is probably a result of conflicting predation pressures exerted by different year classes of salamanders. Salamander gut samples suggest that ontogenetic shifts in diet might explain why cyclic fluctuations in the abundance of this predator had only minor impacts on benthic community composition despite having major effects on invertebrate biomass. [less ▲]

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See detailALADDIN: an optimized ground-based precursor for DARWIN
Coudé du Foresto, Vincent; Absil, Olivier ULg; Barillot, Marc et al

in Aime, C.; Vakili, F. (Eds.) Direct Imaging of Exoplanets: Science & Techniques (2006)

The ALADDIN concept is an integrated Antarctic-based L-band experiment whose purpose is to demonstrate nulling interferometry and to prepare the DARWIN mission. Because of their privileged location, the ... [more ▼]

The ALADDIN concept is an integrated Antarctic-based L-band experiment whose purpose is to demonstrate nulling interferometry and to prepare the DARWIN mission. Because of their privileged location, the relatively modest collectors (1 m) and baseline (up to 40 m) are sufficient to achieve a sensitivity (in terms of detectable zodi levels) which is about twice better than that of a nulling instrument on a large interferometer (such as GENIE at the VLTI), and to reach the 20-zodi threshold value identified to carry out the DARWIN precursor science. These numbers are based on a preliminary design study by Alcatel Alenia Space and were obtained using the same simulation software as the one employed for GENIE. The integrated design enables top-level optimization and full access to the light collectors for the duration of the experiment, while reducing the complexity of the nulling breadboard. [less ▲]

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See detailPEGASE: a DARWIN/TPF pathfinder
Ollivier, M.; Le Duigou, J.-M.; Mourard, D. et al

in Aime, C.; Vakili, F. (Eds.) Direct Imaging of Exoplanets: Science & Techniques (2006)

The space mission PEGASE, proposed to the CNES (Centre National d'Etudes Spatiales = French Space Agency) in the framework of its call for scientific proposals : "formation flying missions", is a 2 ... [more ▼]

The space mission PEGASE, proposed to the CNES (Centre National d'Etudes Spatiales = French Space Agency) in the framework of its call for scientific proposals : "formation flying missions", is a 2-aperture interferometer, composed by 3 free flying satellites (2 siderostats and 1 beam combiner), allowing baselines from 50 to 500 m in both nulling and visibility modes. With an angular resolution of a few mas and a spectral resolution of several tens in the spectral range 2.5-5 microns, PEGASE has several goals:science : spectroscopy of hot jupiters (Pegasides) and brown dwarves, exploration of the inner part of protoplanetary diskstechnology : validation in real space conditions of formation flying, nulling and visibility interferometry concepts.PEGASE has been studied at a 0-level. In this paper, we summarize the scientific program and associated technological and mission trade-off coming from this 0-level study. We also discuss how PEGASE can be considered as a TPF/DARWIN pathfinder in an international roadmap towards more complex space interferometry missions such as DARWIN/TPF. [less ▲]

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See detailObservations of Comet 73P/SW3 close to its closest approach to the Earth.
Tozzi, G. P.; Bagnulo, S.; Boehnhardt, H. et al

in European Planetary Science Congress 2006 (2006)

In May 2006 comet 73P/SW3 passed at less than 0.1 AU from Earth providing us an unique opportunity for high spatial resolution study of its coma. This event was expected to be particularly interesting ... [more ▼]

In May 2006 comet 73P/SW3 passed at less than 0.1 AU from Earth providing us an unique opportunity for high spatial resolution study of its coma. This event was expected to be particularly interesting because the comet had broken apart in 3-4 fragments in 1996. The 2006 apparition has been even more interesting because the fragments produced in 1996, when approaching the Sun, were continuously breaking apart. This process resulted in many small sub-fragments and in the injection in the coma of fresh material, coming from the interior of the nuclei, giving the possibility to study this uncontaminated material. The breaking fragments have been observed at ESO in the visible and near-IR with the aim of analyzing this fresh solid component of the coma in search of possible presence of organic solids. In the presentation we will report preliminary results of this campaign. [less ▲]

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See detailDes outils pour concevoir et réguler des dispositifs d'apprentissage autonome hybrides ou à distance
Denis, Brigitte ULg

in Faciliter les apprentissages autonomes, 7e colloque européen sur l'autoformation, Toulouse (2006)

L’auteur propose différents modèles ou outils d’analyse qui supportent la conception de dispositifs de formation recourant aux TIC et favorisant des apprentissages autonomes. Elle met plus ... [more ▼]

L’auteur propose différents modèles ou outils d’analyse qui supportent la conception de dispositifs de formation recourant aux TIC et favorisant des apprentissages autonomes. Elle met plus particulièrement en relation le lien entre certaines facettes du « modèle » du DIAMANT et la tenue d’un carnet de bord par es apprenants. Elle illustre ensuite son approche en prenant l’exemple du dispositif d’apprentissage collaboratif à distance Learn-Nett. Son analyse se focalise sur les facettes suivantes du dispositif de formation : caractéristiques des apprenants, compétences (prérequises et à acquérir), préparation technologique et à la collaboration à distance, options épistémologiques et méthodes de formation, rapport réflexif sur le vécu du processus d’apprentissage basé sur le carnet de bord tenu par les apprenants. [less ▲]

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See detailMigraine specificities during childhood to adulthood: diagnosis and treatment
de Tourtchaninoff, M.; Misson, Jean-Paul ULg

in Acta Neurologica Belgica (2006)

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See detailConceptual model of hydrogeological information for a GIS-based decision support system of artificial recharge in semi-arid regions
Wojda, Piotr; Gogu, Constantin Radu; Brouyère, Serge ULg

in Cox, S.; Laxton, J. (Eds.) Quantitative Geology from multiple sources: Delivering geoscience information through open web standards (2006)

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See detailLe climat du Québec : un passé pour quel avenir ?
Boreux, Jean-Jacques ULg; Bernier, J.; Perreault, L.

Conference (2006)

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See detailDéfinir, normaliser, enseigner les discours universitaires
Defays, Jean-Marc ULg

in Suomela-Salmi, Eija; Dervin, Fred (Eds.) Perspectives interlinguistiques et interculturelles sur le discours académique (2006)

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See detailLes fours de potiers mérovingiens découverts à Maastricht
Van Wersch, Line ULg

in Husi, Philippe; Hincker, Vincent (Eds.) actes du colloque international, La céramique du Haut Moyen Âge (Ve-Xe siècles) dans le nord-ouest de l’Europe. Bilan et perspectives dix ans après le colloque d’Outreau (2006)

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See detailPlasminogen activator inhibitor type I (PAI-1) controls bone marrow-dependent and independent vascularization
Jost, M.; Maillard, Catherine ULg; Lambert, Vincent ULg et al

in Acta Clinica Belgica (2006), 61(2, MAR-APR), 87

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See detailStranding of a humpback whale (Megaptera novaeangliae) on the Belgian coast
Jauniaux, Thierry ULg; Brenez, C.; Haelters, J. et al

in proceeding of the annual conference (2006)

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See detailAuthentizität versus Fiktionalität – Grenzen des Realismus in Günter Grass' Novelle „Im Krebsgang“
Pontzen, Alexandra ULg

in Roland, Hubert; Fabry, Geneviève (Eds.) Les frontières du réalisme dans la littérature narrative du 20e siècle/ The Borders of Realism in 20th Century Narrative Literature (2006)

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See detailProsodische aspecten van de tussentaal van vreemdetaalleerders
Rasier, Laurent ULg

Conference (2006)

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See detailProteomics of marine microorganisms
Voigt, B.; Hieu, C.X.; Wilmes, B. et al

Conference (2006)

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See detailMetabolic and cardiovascular consequences of strenuous concentric versus eccentric isokinetic exercise
Lehance, Cédric ULg; Bury, Thierry ULg; Maquet, Didier ULg et al

in Abstract Book “Exercise and muscle physiology” de l’Ecole Doctorale en Sciences de la Motricité (2006)

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See detailAndrogens regulation of the ERBB1 and ERBB2 oncogene expression in human prostate cancer cells
Pignon, Jean-Christophe ULg; Delacroix, Laurence; Waltregny, David ULg et al

in Acta Clinica Belgica (2006), 61(2, MAR-APR), 95-95

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See detailLittérature populaire et culture de masse en Belgique dans les années 1930. Jean Ray, Georges Simenon, Hergé
Denis, Benoît ULg

in Mollier, Jean-Yves; Sirinelli, Jean-François; Vallotton, François (Eds.) Culture de masse et culture médiatique en Europe et dans les Amériques. 1860-1940 (2006)

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See detailPrincipes généraux de la prothèse implantaire
Van Heusden, Alain ULg

Conference (2006)

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See detailA Complete Open-Source Solution for Electromagnetic Field Computation
Geuzaine, Christophe ULg; Dular, Patrick ULg; Remacle, J.-F.

in Proceedings of the 12th IEEE Conference on Electromagnetic Field Computation, CEFC 2006 (2006)

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See detailEEG imaging methods applied to brain-computer interface
Noirhomme, Quentin ULg; Macq, B.

in Proceedings of SPIE Medical Imaging 2006 (2006)

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See detailStudy of the combined effects of temperature, pH and Aw on the growth rate of Trichoderma asperellum using a response surface methodology
Begoude, B. A. D.; Lahlali, R.; Friel, D. et al

Poster (2006)

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See detailInvestigation of factors influencing levels of trace metals using stable isotope analysis.
Bustamante, Paco; Das, Krishna ULg; Caurant, Florence

Poster (2006)

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See detailMéthodologie raisonnée des tests de résistance à la fatigue
Croisier, Jean-Louis ULg; Maquet, Didier ULg; Forthomme, Bénédicte ULg et al

in Abstract book des 8èmes Rencontres de Médimex (2006)

Les épreuves isocinétiques destinées à apprécier la qualité de force musculaire ont fait l’objet de nombreux travaux de validation. Ces épreuves maximales, de courte durée (nombre réduit de répétitions ... [more ▼]

Les épreuves isocinétiques destinées à apprécier la qualité de force musculaire ont fait l’objet de nombreux travaux de validation. Ces épreuves maximales, de courte durée (nombre réduit de répétitions), reconnaissent des applications dans des domaines variés : traumatologie et chirurgie de l’appareil locomoteur, affections neurologiques, insuffisances pulmonaire et cardiaque, prévention lésionnelle … Selon les contextes, les protocoles comportent des exercices concentriques et/ou excentriques à différentes vitesses angulaires. D’autres qualités musculaires, fondées sur des filières énergétiques différentes, peuvent bénéficier de l’exploration isocinétique. Ainsi, l’étude de la résistance à la fatigue, correspondant davantage au métabolisme anaérobie lactique, devrait représenter une application de choix. Cependant, les épreuves isocinétiques de résistance à la fatigue n’ont, à ce jour, pas bénéficié de la même attention méthodologique, rendant leur application clinique plus confidentielle. Il semble légitime de s’interroger sur les critères actuels d’interprétation d’un test de résistance à la fatigue, et en particulier sur la définition d’un résultat « anormal » impliquant une prise en charge thérapeutique. Plusieurs points retiennent notre attention : o groupes musculaires à explorer ; o choix du mode de contraction et de la vitesse angulaire ; o durée optimale de l’épreuve (nombre de répétions) ; o reproductibilité et caractère discriminant des paramètres mesurés et calculés ; o conséquences physiologiques de ce type d’effort et risques potentiels ; o champs d’application. Des résultats récents [1] indiquent, chez des sujets masculins sains pour les muscles quadriceps (Q) et fléchisseurs (Fl) du genou : - la bonne reproductibilité du paramètre Travail total (Wtot) mesuré sur le quadriceps au cours d’une épreuve à 180°/s, comportant 20, 30, 40 ou 50 répétitions ; le Wtot mesuré sur les Fl apparaît moins reproductible ; - les index de fatigue classiquement calculés par les dynamomètres isocinétiques mettent en relation les performances au terme de l’épreuve (3-5 dernières répétitions) avec la performance au début de l’exercice (3-5 premières répétitions). Sur base de la qualité de reproductibilité, de tels index de fatigue devraient laisser place à des index de fatigue rapportant la performance à la fin de l’exercice (3-5 dernières répétitions) au Wtot développé durant l’épreuve ; - les muscles ischio-jambiers se caractérisent par une résistance à la fatigue réduite en comparaison avec le quadriceps. Il est tentant d’ajouter cette particularité à la liste des facteurs intrinsèques de risque lésionnel des ischio-jambiers ; - les épreuves isocinétiques de résistance à la fatigue s’accompagnent d’une sollicitation cardio-vasculaire majeure : ainsi la fréquence cardiaque (FC) s’élève à 83 % de la FC maximale théorique dès la 20ème répétition, et atteint 87 % à la 50ème répétition. Une telle réponse indique clairement le risque potentiel des épreuves de résistance à la fatigue. Ainsi la durée (20 – 30 – 40 ou 50 répétitions) de l’épreuve sera adaptée à la population bénéficiant de l’évaluation. Références [1] Croisier et al. Analysis of a fatigue protocol for knee extenso rand flexor muscle groups. Isokin Exerc Sci (accepted). [less ▲]

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See detailEvolution des échouages et des causes de mortalité des mammifères marins dans le nord de la France (1995-2005)
Jauniaux, Thierry ULg; Brenez, C.; Haelters, J. et al

in annual proceeding (2006)

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See detailCarbon balance of two Belgian crops
Moureaux, Christine ULg; Debacq, Alain ULg; Vilret, Amélie et al

in Open conference on the GHG cycle in the Northern Hemisphere (2006)

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See detailMechanisms of cohort suppression and population fluctuation in tiger salamanders
Whiteman, Howard; Wissinger, Scott; Denoël, Mathieu ULg

Conference (2006)

The mechanisms underlying population fluctuation have been well studied in mammals and insects but less research has focused on amphibians. Yet, the current global decline of amphibians equires that we ... [more ▼]

The mechanisms underlying population fluctuation have been well studied in mammals and insects but less research has focused on amphibians. Yet, the current global decline of amphibians equires that we understand these mechanisms, and be able to distinguish between anthropogenically induced declines and natural population fluctuations. We have followed a marked population of the Arizona tiger salamander, Ambystoma tigrinum nebulosum, for over 16 years during which time the population has completed two “boom and bust” cycles, generated by a dominant cohort that appears to suppress larval recruitment until it senesces. We tested two hypotheses for this suppression, cannibalism and resource depression, using a series of meso- and microcosm experiments. We found significant lethal and sublethal (behavior, diet, growth rates) effects of cannibalism by large larvae and paedomorphic adults on hatchling and 1st-year larvae, suggesting that both cannibalism and the threat of cannibalism are important in cohort suppression. Resource depression experiments revealed that paedomorphic adults did not affect larval survival, diet, or growth, despite reduced prey densities, because paedomorphs mainly reduced large bodied prey, whereas hatchlings fed primarily on smaller benthic and zooplanktonic invertebrates. Future experiments will determine how hatchlings are impacted by boom cohorts that are more similar in size and diet. Our results lend insight into the mechanisms underlying fluctuations in this population, and suggest that a better understanding of natural population fluctuations will aid amphibian conservation efforts. [less ▲]

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See detailStudy of the powerplant of Lanaye
Topliceanu, I.; Erpicum, Sébastien ULg; Pirotton, Michel ULg et al

in Proceedings of Hydroenergia 2006 (2006)

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See detailLa dispute: un mode particulier du conflit verbal enfantin
Meunier, Deborah ULg

in Ionescu-Ruxndoiu (Ed.) Cooperation and conflict in ingroup and intergroup communication: selected papers from Xth biennial Congress of the IADA (2006)

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See detailDe quelques avatars de la notion de réseau en sociologie
Claisse, Frédéric ULg

in de Marneffe, Daphné; Denis, Benoît (Eds.) Les réseaux littéraires (2006)

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See detailDuctility of encased composite columns
Degée, Hervé ULg; Doneux, C. L.; Plumier

in Proceedings of the ICMS Conference (2006)

This paper presents results ofanumerical study onreinforced concrete and fully encased composite columns designed according to the “Inerd” concept aiming at obviating the soft storey mechanism in frames ... [more ▼]

This paper presents results ofanumerical study onreinforced concrete and fully encased composite columns designed according to the “Inerd” concept aiming at obviating the soft storey mechanism in frames subjected to earthquake. The model uses fibre beam elements with mono-axial non linear material laws for concrete, steel and reinforcing steel. The crushing of concrete in compression and the cracking in tension are taken into account. The steel behaviour is elastic-plastic with strain hardening. After calibration of the model against experimental results, a parametric study is performed. The main objective is to generate the cyclic moment-rotation curves of the columns under different level of axial forces and with different proper-ties of concrete and then to deduce ductility and rotation capacity of the composite sections from these curves. [less ▲]

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See detailTime series of the partial pressure of carbon dioxide (2001 2004) and preliminary inorganic carbn budget in the Scheldt plume (Belgian coastal waters)
Schiettecatte, L.-S.; Gazeau, F.; van der Zee, C. et al

Poster (2006)

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See detailLa notion de biens
Vanbrabant, Bernard ULg; Lecocq, Pascale ULg; sagaert, vincent

in Leleu, Yves-Henri (Ed.) Rapports belges au XVIIème colloque de l'Académie internationale de droit comparé (2006)

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See detailSpecificity of different RIA systems for measurement of bovine pregnancy associated glycoproteins against carbohydrates and placental hormones.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Proceedings of the 10e Journée de Rencontre Bioforum (2006)

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See detailCurrent thinking about Jupiter's magnetic anomaly
Grodent, Denis ULg; Gérard, Jean-Claude ULg; Gustin, Jacques ULg et al

Conference (2006)

Repeated imaging of Jupiter's aurora has shown that the northern main oval has a distorted 'kidney bean' shape in the general range of 90-150o System III 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 90-150o System III longitude, which appears unchanged since 1994. While it is more difficult to observe the conjugate regions in the southern aurora, no corresponding distortion appears in the south. Recent improved accuracy in locating the auroral footprint emission of Io 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 the Io footprint from the main oval implies a locally weaker field strength. The most recent images obtained with the Hubble Space Telescope Advance Camera for Surveys (ACS) allow us to complement previous observations with the location of the auroral footprints of Io, Europa, and Ganymede in the region of interest. Their footpaths vary in parallel and form a kink in the 90-150° S3 sector which strongly suggests the presence of a magnetic anomaly in this region. [less ▲]

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See detailInvestigation of interactions between phospholipids, cholesterol and surfactin by atomic force microscopy and differential scanning calorimetry
Eeman, Marc; Nylander, Tommy; Dufrêne, Yves et al

Poster (2006)

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See detailEffect of increased CO2 in the second half of incubation on embryonic growth and on the hatching process
Everaert, Nadia ULg; Bruggeman, V.; De Smit, L. et al

Conference (2006)

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See detailEnsembles of extremely randomized trees and some generic applications
Wehenkel, Louis ULg; Ernst, Damien ULg; Geurts, Pierre ULg

in Proceedings of Robust Methods for Power System State Estimation and Load Forecasting (2006)

In this paper we present a new tree-based ensemble method called “Extra-Trees”. This algorithm averages predictions of trees obtained by partitioning the inputspace with randomly generated splits, leading ... [more ▼]

In this paper we present a new tree-based ensemble method called “Extra-Trees”. This algorithm averages predictions of trees obtained by partitioning the inputspace with randomly generated splits, leading to significant improvements of precision, and various algorithmic advantages, in particular reduced computational complexity and scalability. We also discuss two generic applications of this algorithm, namely for time-series classification and for the automatic inference of near-optimal sequential decision policies from experimental data. [less ▲]

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See detailFluid - structure interaction modeling with a coupled 1D - 2D free surface flow solver
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of Riverflow 2006 (2006)

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic ... [more ▼]

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic structure design and fluid-structure interaction, additional developments have been implemented in the finite volume 2D model to deal with boundaries not aligned along axis or with moving structures. The cut cell based approach, simpler than other classical methods, is based on the division with a sub-grid of the initial Cartesian meshes. While keeping the advantages of regular grids in terms of simplicity, accuracy and storage capacity, it enables to compute instantaneous effects of a structure movement on the fluid or to deal with complex boundaries inclined compared to mesh axis. Several test cases are presented, as well as an applica-tion of the enhanced model, coupled with a 1D one, to the computation of the hydrodynamic fields induced by a lock-door movement. [less ▲]

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See detailAntireflective subwavelength patterning of IR optics
Vandormael, Denis; Habraken, Serge ULg; Loicq, Jerôme ULg et al

in Proceedings of SPIE (2006), 6395

Thermal infrared (IR) lenses require efficient anti-reflection coating. Moth-eye (or egg-box) 2D subwavelength gratings have demonstrated their ability to reach a very high transmission for a wide ... [more ▼]

Thermal infrared (IR) lenses require efficient anti-reflection coating. Moth-eye (or egg-box) 2D subwavelength gratings have demonstrated their ability to reach a very high transmission for a wide wavelength and angular range. The use in thermal IR is simplified by the lower resolution for lithographic technology, compared to visible waveband. However, deeper structures must be engraved and lithography must be adapted to IR materials. In order to be cost-effective, the patterning must be produced by replication techniques, such as embossing. Our laboratory is now experimenting hot embossing of moth-eye patterns in chalcogenide substrates. In this paper, theoretical analysis, micro-lithographic technology and manufacturing processes are detailed. [less ▲]

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See detailInvestigating a bottom-up approach for extracting domain ontologies from urban databases
Chaidron, Christophe; Teller, Jacques ULg; Billen, Roland ULg

in Proceedings of the 1st Workshop of COST Action C21 Towntology (2006)

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See detailLe traitement de l'hypertension artérielle prévient-il la démence?
Krzesinski, Jean-Marie ULg

in Louvain Medical (2006), 125(6), 198-202

Chronic arterial hypertension plays a certain role in the cognitive function decline and dementia, particularly Alzheimer's disease, through vascular lesions added to the degenerative injuries. When ... [more ▼]

Chronic arterial hypertension plays a certain role in the cognitive function decline and dementia, particularly Alzheimer's disease, through vascular lesions added to the degenerative injuries. When stroke occurs, it accelerates the development of dementia. By using antihypertensive drugs and correcting high blood pressure, the incidence of stroke has been dramatically reduced. Such treatment has also demonstrated protective efffect on stroke recurrence but also on cognitive dysfunction related to cerebrovascular complication. When severe cognitive dysfunction is present, the interest of antihypertensive treatment, its nature and the blood pressure target have not been clearly defined. An individual approach must be stimulated with an overall cardiovascular risk factors correction. [less ▲]

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See detailTask-Driven Discretization of the Joint Space of Visual Percepts and Continuous Actions
Jodogne, Sébastien ULg; Piater, Justus ULg

in Lecture Notes in Computer Science (2006), 4212

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See detailTomographie pinhole au MIBI-Tc99m dans l’hyperparathyroïdie primaire: comparaison des reconstructions iterative et analytique.
Carlier, Thomas; Oudoux, A.; Bodet-Milin, C. et al

in Médecine Nucléaire : Imagerie Fonctionnelle et Métabolique (2006), 30(09), 519

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See detailLe statut externe du détenu
Jacobs, Ann ULg

in Actualités de droit pénal et de procédure pénale (2006)

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See detailL’apport des chartes originales antérieures à 1271 conservées au dépôt des Archives de l’État de Liège (Belgique) pour la datation du lexique français
Mazziotta, Nicolas ULg

in Buchi, Eva (Ed.) Actes de la Journée d’étude « Lexicographie historique française : autour de la mise à jour des notices étymolo- giques du Trésor de la langue française informatisé » (Nancy/ATILF, 4 novembre 2005) (2006)

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See detailAgriculture in Belgium : main characteristics and problems
Burny, Philippe ULg

in Lorencowicz, Edmund (Ed.) International Scientific Seminar "Farm machinery management in sustainable agriculture" : Seminar Proceedings (2006)

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See detailThe influence of source similarity on memory accuracy
Dehon, Hedwige ULg

Poster (2006)

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See detailStochastic analysis of the recharge uncertainty of a regional aquifer in extreme arid conditions
Rojas, Rodrigo; Dassargues, Alain ULg

in Stauffer, Fr.; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

The Pampa del Tamarugal Aquifer (PTA) is an important source of groundwater in northern Chile. Since the study area is situated in the Atacama Desert, the estimation of groundwater recharge based on ... [more ▼]

The Pampa del Tamarugal Aquifer (PTA) is an important source of groundwater in northern Chile. Since the study area is situated in the Atacama Desert, the estimation of groundwater recharge based on conventional hydrological methods is subject to large uncertainties. To account for variations in the groundwater balance, caused by uncertainties in the average recharge rates, randomly generated recharge values with different levels of uncertainty are simulated using a groundwater flow model. Results show that evaporation and groundwater outflows are insensitive to the recharge uncertainty, while the storage terms can vary considerably. Considering current groundwater abstraction and random recharge rates, it is unlikely that the cumulative discharged volume from the aquifer, after a 45 years simulation period, will be larger than 12% of the estimated groundwater reserve. Simulated groundwater heads fluctuations due to uncertainties in the average recharge rates are more noticeable in certain areas. These fluctuations could explain anomalies in the observed groundwater heads in these areas. [less ▲]

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See detailThe Mesolithic of the Belgian Ardennes
Otte, Marcel ULg; Noiret, Pierre ULg

in Kind, Claus-Joachim (Ed.) After the Ice Age. Settlements, subsistence and social development in the Mesolithic of Central Europe (2006)

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See detailGeneral approach for homogenisation of multi-turn windings in 3D FE models
Gyselinck, Johan; V Sabariego, Ruth ULg; Dular, Patrick ULg

in Proceedings of the Sixth international conference on computation in electromagnetics (CEM2006) (2006)

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See detailStealth Distributed Hash Table: A robust and flexible super-peered DHT
Brampton, A.; MacQuire, A.; Rai, I. A. et al

in Proceedings of the 2006 ACM CoNEXT conference (2006)

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See detailEvaluation of the load bearing capacity of thin-walled steel members for long span composite floors
Rossi, Barbara ULg; Jaspart, Jean-Pierre ULg

in International Colloquium on Stability and Ductility of Steel Structures : SDSS2006, Lisbon 6-8 September 2006 (2006)

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See detailMorphological variability of some Devonian miospores
Breuer, P.; Filatoff, J.; Steemans, Philippe ULg

in Palaeozoic palynology in space and time. CIMP general meting (2006)

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See detailRelationship between surface characteristics and superficial cohesion of concrete
Garbacz, Andrzej; Gorka, M.; Courard, Luc ULg

in Beushausen, H.; Dehn, F.; Alexander, M. G. (Eds.) Concrete Repair, Rehabilitation and Retrofitting (2006)

Existing concrete surfaces have to be prepared before the application of a new layer. Different surface treatments (grinding, sandblasting, shotblasting, hand- and mechanical milling) have been performed ... [more ▼]

Existing concrete surfaces have to be prepared before the application of a new layer. Different surface treatments (grinding, sandblasting, shotblasting, hand- and mechanical milling) have been performed and the quality of the preparation has been established on the base of three main parameters: surface roughness, superficial concrete microcracking and adhesion. Cracks have been systematically observed, in relation with surface treatment by means of Scanning Electron Microscope and Light Microscope. Finally, a repair mortar, with or without bond coat, has been applied on the concrete substrates and adhesion has been measured. Analysis of results clearly show the effect of roughness on adhesion in the case where no bond coat is used, the influence of the surface treatment on the waviness shape of the profile and the presence of microcracks in the near-to-surface layer, which is related to failure type. [less ▲]

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See detailPrognostic value of white blood cell drop in horses undergoing post-colic surgery intensive care.
Chiavaccini, Ludovica; Péters, Fabrice; Gangl, Monika et al

Conference (2006)

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See detailThe use of morphological indicators and genetic algorithms in structural optimization considering stiffness constraints
Van Den Bergh, Thomas; Verbeeck, Ben; De Wilde, Patrick et al

(2006)

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See detailStudy of the determinism of the glanded-plant and glandless-seed trait introgressed in G. hirsutum from G. sturtianum. Germplasm and genetic stocks
Mergeai, Guy ULg; Lacape; Ndir, K et al

in Proceedings of the international cotton genome initiative, 18-20 September, 2006, Brazilia, Brazil (2006)

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See detailMaternal stress markers during pregnancy
Tsubouchi, Hiroaki; Shimoya, Koichiro; Song, Myhion et al

Poster (2006)

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See detailInfluence of stiffness constraints on optimal design of trusses using morphological indicators
Vandenbergh, Thomas; Ponsaert, Wim; Van Steirteghem, Jan et al

(2006)

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See detailInterleukin-6 mediates subchondral osteoblasts-induced cartilage degradation
Sanchez, Christelle ULg; Kaut, Elizabeth; DEBERG, Michelle ULg et al

Conference (2006)

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See detailInnovations in software packages in quantitative genetics
Druet, Tom ULg; Ducrocq, V.

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailHistone deacetylase 7 is involved in the control of angiogenesis by regulating platelet-derived growth factor-β
Mottet, Denis; Bellahcene, Akeila ULg; Deroanne, Christophe et al

Conference (2006)

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See detailConceptualisaiton d'un événement de santé et sa prise en compte dans la collecte des biographies individuelles
Banturiki, Yannick Védaste ULg; Nganawara, Didier; Thomsin, Laurence ULg

in Cahiers Québecois de Démographie (2006), 35/2(Automne), 161-174

Depuis quelques années, les recherches sur les inégalités existant entre les individus par rapport à leur santé se focalisent sur l’influence exercée par les conditions sociales tout au long du cycle de ... [more ▼]

Depuis quelques années, les recherches sur les inégalités existant entre les individus par rapport à leur santé se focalisent sur l’influence exercée par les conditions sociales tout au long du cycle de vie. En somme, c’est l’aspect dynamique de la santé qui est de plus en plus privilégié. Cependant, la collecte d’un événement de santé au moyen de l’approche biographique a été rarement mise en oeuvre dans les recueils biographiques. La présente note vise à présenter le cheminement conceptuel et la démarche méthodologique que nous avons suivis pour définir un événement de santé et l’intégrer dans une enquête biographique mise en place en Belgique. La première partie de cette note présente succinctement les définitions allouées à l’état de santé d’un individu. La deuxième partie met en lumière les avantages et les limites de la collecte longitudinale et montre l’intérêt de l’approche biographique. La troisième partie, enfin, est consacrée à la présentation de l’approche innovatrice que nous avons mise en oeuvre, autour de l’idée des interruptions d’activités, pour collecter un événement de santé dans un dispositif biographique. [less ▲]

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See detailImproving control of storage diseases on apple by combining biological and physical postharvest methods
Creemers, P.; Van Laer, S.; Vorstermans, B. et al

Poster (2006)

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See detailAnalysis of buildings height computed on a DSM generated from a VHR satellite stereopair
Binard, Marc ULg; Devriendt, D.; Cornet, Yves ULg et al

in Hostert, P.; Damm, A.; Schiefer, S. (Eds.) Proceedings of the First Workshop of the EARSeL Special Interest Group on Urban Remote Sensing "Challenges and Solutions" (2006)

At the final meeting of the SPIDER project, the users wanted to know if it was possible to evaluate the building height or the number of floors, from the DSM obtained from a VHR satellite stereopair ... [more ▼]

At the final meeting of the SPIDER project, the users wanted to know if it was possible to evaluate the building height or the number of floors, from the DSM obtained from a VHR satellite stereopair. Combined with the 2D delineation of the buildings – for example coming from the cadastre register - this information could be useful in urban studies – e.g. population density assessment - or to generate quasi realistic 3D views. In this example, the DSM is extracted from an IKONOS stereopair (DSMsat) on the hilly area of Liège in Belgium. It is used in combination with a 3D vector file. On the one hand, this file is used for the 2D delineation of the buildings. On the other hand, the third dimension provided by this file is also exploited for the assessment of the extracted building height. Moreover LIDAR data are also available over the test area, permitting the creation of a reference DSM (DSMref). * The first step of the process consists in the determination of the ground altitude around the buildings. A procedure was setup in order to compute it and to generate the DTM for the reference and satellite data (DTMref and DTMsat). * The second step consists in the extraction of statistics, for every building (min, max, mean, etc.) as well from the DSMsat and DSMref, as from the DTMsat and DTMref. The analysis shows that the satellite approach globally underestimates the building height of about 4 m. These results are discussed regarding building height versus the area and the heterogeneity of the roof height. [less ▲]

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See detailUsing lupin seeds to replace soybean meal in pig feed: effect of alpha-galactosidase supplement and lupin variety on nitrogen retention and diet digestibility in pigs.
Froidmont, E.; Wathelet, Bernard ULg; Beckers, Yves ULg et al

in Mexico, where old and new world lupins meet. Proceedings of the 11thInternational Lupin Conference, Guadalajara, Jalisco, Mexico, 4-9 May2005 (2006)

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See detailMeasurement-induced spatial modulation of spontaneous decay and photon arrival times
von Zanthier, J.; Bastin, Thierry ULg; Agarwal, G. S.

Poster (2006)

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See detailThe dynamics of the guests in filled germanium clathrates
Hermann, Raphaël ULg; Grandjean, Fernande ULg; Keppens, V. et al

in Mater. Res. Soc. Symp. Proc. Vol. 886 (2006)

In the filled gallium-germanium clathrates, R8Ga16Ge30, where R is Ba, Sr, or Eu, the guests are located in two large cages and are weakly bound to the crystalline clathrate framework. The caged guests ... [more ▼]

In the filled gallium-germanium clathrates, R8Ga16Ge30, where R is Ba, Sr, or Eu, the guests are located in two large cages and are weakly bound to the crystalline clathrate framework. The caged guests exhibit a localized "rattling" vibrational mode that provides an efficient mechanism for reducing the thermal conductivity. Inelastic neutron scattering and nuclear inelastic scattering measurements have yielded the phonon density of states in R8Ga16Ge30; the line width of the localized vibrational modes is found to be an important parameter in determining the lattice thermal conductivity. Neutron diffraction studies on R8Ga16Ge30 have shown that the guests in the larger cage are located off-center, and it was proposed that their jumping about the four off-center locations is responsible for the observed glass-like thermal conductivity at temperatures below 10 K. The detection of such slow guest motion is challenging because the typical time and energy scales involved are ca. 4 ns and 1 mu eV, respectively. We have studied the slow europium tunneling dynamics in Eu4Sr4Ga16Ge30 by both Mossbauer and microwave absorption spectroscopy. [less ▲]

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See detailClinical evaluation of iterative versus analytic reconstruction for parathyroid lesions visualization in primary hyperparathyroidism with 99mTc-MIBI pinhole SPECT.
Ansquer, C.; Mirallié, E.; Oudoux, A. et al

in European Journal of Nuclear Medicine and Molecular Imaging (2006), 33(S2), 355

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See detailProtein folding is a rate limiting step for bacterial growth at low temperatures
D'Amico, Salvino; Piette, Florence; Leprince, Pierre ULg et al

Poster (2006)

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