References of "Scientific congresses and symposiums"
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See detailDevelopment of Space Weather related services for real time GPS applications in the frame of the SIDC Space Weather Pilot Project
Warnant, René ULg; Bavier, Michaël; Lejeune, Sandrine et al

Conference (2004)

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See detailLa déacétylase d’histones HDAC8 est un nouveau marqueur de différenciation des cellules musculaires lisses
Glénisson, Wendy; de Leval, Laurence ULg; Tran, Syv Li et al

Conference (2004)

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See detailMesoscopic model of intergranular cracks in low carbon steel during cooling of continuous casting
Castagne, S.; Pascon, Frédéric ULg; Lecomte-Beckers, Jacqueline ULg et al

in Lamberigts, M. (Ed.) Proceedings of the 2nd international conference of thermomechanical processing of steels (TMP 2004) (2004)

This paper addresses the problem of transverse cracking during the continuous casting of low carbon steel. The damage mechanisms occurring at high temperature during this process are identified and a ... [more ▼]

This paper addresses the problem of transverse cracking during the continuous casting of low carbon steel. The damage mechanisms occurring at high temperature during this process are identified and a numerical approach for the modelling of these phenomena at the grain scale is proposed. Experiments allowing the identification of the model’s parameters are described. Finally, the first results obtained with the model are presented. [less ▲]

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See detailLes contrats. Le contrat d'entreprise et la loi Breyne
Kohl, Benoît ULg

in Chroniques du droit à l'usage du notariat (2004)

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See detailMotivation et démotivation : les élèves ont la parole
Chenu, Florent ULg

in Actes du 3e congrès des chercheurs en éducation, Espace Flagey, Bruxelles, Mai 2004. (2004)

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See detailDirect estimation of sieve size distributions from 2-D image analysis of sand particles
Pirard, Eric ULg; Vergara, Nicolas; Chapeau, Vincent

in Proceedings PARTEC 2004 (2004)

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See detailEsQUIsE-SMA : Un système multi-agents pour l'interprétation d'esquisses architecturales
Juchmes, Roland ULg; Leclercq, Pierre ULg; Azar, Sleiman

in Actes de la 16ème conférence francophone sur l’interaction homme-machine (IHM’04) (2004)

Architects use freehand sketches in the initial stages of their design work because they prove to be the best adapted media for handling and expressing their preliminary ideas. Therefore, to help ... [more ▼]

Architects use freehand sketches in the initial stages of their design work because they prove to be the best adapted media for handling and expressing their preliminary ideas. Therefore, to help designers in their inventive work, a means for inputting and interpreting their sketches was needed.We propose a multi-agent approach to attain that goal. In this paper, we describe the operations of a multi-agent system for the on-line recognition of sketches. This system is currently integrated into the EsQUIsE prototype, a demo program for inputting, analysing and interpreting architectural design sketches. [less ▲]

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See detailLe texte dans tous ses états. Philosophie d’encodage du projet Khartês
Mazziotta, Nicolas ULg

in Dister, Anne; Purnelle, Gérald; Fairon, Cédrick (Eds.) Le poids des mots. Actes des 7es Journées internationales d’Analyse statistique des Données Textuelles (2004)

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to ... [more ▼]

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to read for someone erases marks that would look valuable from another point of view. Hence, there is an unavoidable gap between the source and the edition. The Khartês project (which intends to edit and study original Old French charters written in Liège before 1300) has encountered this problem. Traditional « solutions » were inadequate and computers opened an interresting path. However, Khartês had to think about creating an encoding scheme that would suit its aim and remain easy to use. This is the way KML (the Khartês Markup Language, an XML-conformant language) was born, together with a small set of handy encoding rules. A wide range of applications are made possible. For instance, thanks to the way the corpus has been created, it has been possible to search a particular document for marked letters (which look like our uppercase letters) and to study them. [less ▲]

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See detailMultivariate discrimination of sands using elongation and abrasivity indices
Pirard, Eric ULg; Vergara, Nicolas

in Proceedings PARTEC (9th European Symposium on Particle Characterization) (2004)

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See detailContribution of tobacco smoking to dioxin accumulation: opposite effects according to gender
Fierens, Sébastian; Eppe, Gauthier ULg; Focant, Jean-François ULg et al

in Organohalogen Compounds (2004), 66

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See detailApproche unifiée des interactions entre l'hydrodynamique et le milieu naturel ou construit: exemples d'applications expérimentales et numériques
Pirotton, Michel ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Actes des 5èmes journées scientifiques et techniques du CETMEF (2004)

Même si le contexte contemporain fait évoluer les problèmes qui y sont liés, force est de constater que les défis majeurs attachés à l’eau subsistent ou se radicalisent. De l'écrêtement des crues au ... [more ▼]

Même si le contexte contemporain fait évoluer les problèmes qui y sont liés, force est de constater que les défis majeurs attachés à l’eau subsistent ou se radicalisent. De l'écrêtement des crues au soutien d'étiage, du recours toujours croissant à l'eau pour l’activité industrielle au sens large au maintien de ses propriétés écologiques pour la consommation, tout concourt à faire du problème de l’eau un défi du 21e siècle, bien rare à épargner et à gérer plus efficacement. Qu'elle s'intéresse à l’origine, à la consommation ou à l’utilisation de l’eau ou encore qu'elle se tourne vers les conséquences possibles des infléchissements que l'homme peut provoquer sur le cycle de l’eau, la gestion actuelle des ressources hydrauliques ne peut plus ignorer les nouvelles potentialités nées de l'accroissement rapide des possibilités numériques qui permettent, avec les acquis théoriques en mécanique des fluides, de développer des outils d'aide à la décision applicables à des situations grandeur nature. Parmi tous les domaines de l’hydraulique touchés par le numérique, l'intérêt du HACH à modéliser l’ensemble des écoulements à surface libre résulte simplement de leur prépondérance dans les phénomènes hydrodynamiques influents sur lesquels on s'efforce d'agir. A l'échelle du système hydrologique global, le souci de gérer, donc d’anticiper les phénomènes naturels et accidentels, conduit ainsi à couvrir avec des approches physiquement basées les différentes étapes que connaît la goutte d’eau lorsqu’elle frappe la surface terrestre, du ruissellement au gonflement des rus, rivières et zones de stockage, jusqu’aux grands fleuves et voies intérieures de navigation. Délaissant volontairement le formalisme des équations utilisées et des méthodes numériques de résolution, cet article s’attache à prouver la pertinence du recours au numérique par une illustration chronologique (au fil de l’eau) de quelques situations réelles gérées par la suite des programmes WOLF, complètement écrits au sein du HACH. [less ▲]

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See detailNew analogues of the KATP channel opener cromakalim : synthesis and pharmacological evaluation on rat pancreatic B-cells and rat aorta rings
Sebille, S.; De Tullio, Pascal ULg; Antoine, M. H. et al

in Fundamental & Clinical Pharmacology (2004)

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See detailPrevalence of Toxocara canis eggs in faecal deposits from pet dogs in Liège, Belgium
Mignon, Bernard ULg; Vermout, S.; Moreaux, N. et al

Poster (2004)

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See detailRéflexion sur les obstacles et les paradoxes d'une évaluation des compétences professionnelles
Chenu, Florent ULg

in Actes du 3e congrès des chercheurs en éducation, Espace Flagey, Bruxelles, Mai 2004. (2004)

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See detailThe mechanobiology of tissue differentiation around immediately loaded implants: a bone chamber experiment
Geris, Liesbet ULg; Van Oosterwyck, Hans; Duyck, Joke et al

in Proceedings of the 14th conference of the European Society of Biomechanics (2004)

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See detailFood Chain Security : a Belgian perspective
Brunet, Sébastien ULg

Conference (2004)

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See detailAntiapoptotic effect of GM-CSF activated STAT5 signaling pathway in chronic mastitis-affected cows : possible involvement in persistent accumulation of neutrophils in milk
Boutet, Philippe ULg; Bureau, Fabrice ULg; Gillet, Laurent ULg et al

in Congress COST Action 844: “Apoptosis and programmed cell death : molecular mechanisms and applications in Biotechnology and Agriculture” (2004)

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See detailMelting and crystallisation behaviour of multi-component Fe-C-Cr-X alloys : microstructural aspects
Tchuindjang, Jérôme Tchoufack ULg; Lecomte-Beckers, Jacqueline ULg

in Proceedings of the 13th European Microscopy Congress (2004)

Studied materials are of the Fe-C-Cr-X multi-component system where X represents a group of strong carbides formers as Mo, V, or Nb. These alloys are used for wear components. Differential Thermal ... [more ▼]

Studied materials are of the Fe-C-Cr-X multi-component system where X represents a group of strong carbides formers as Mo, V, or Nb. These alloys are used for wear components. Differential Thermal Analysis (DTA) was used to determine the melting and solidification behaviour of these materials. Raw material has a thermomecanical history that involved casting, heat treating and hot forming, which could be investigated by the melting sequence of the DTA trial. [less ▲]

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See detailApplication of the CALUX bioassay for epidemiological study: analyses of Belgian human plasma
Van Wouwe, Nathalie; Debacker, Noemi; Sasse, André et al

in Organohalogen Compounds (2004)

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See detailPotentialisation de l'immunité naturelle du rat nouveau-né par les polyamines exogènes
Powroznik, Brigitte; Gharbi, Myriam ULg; Dandrifosse, Guy ULg et al

Conference (2004)

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See detailInside-out transobturator vaginal tape (TVT-O): Short-term results of a prospective study
Waltregny, David ULg; Reul, Olivier ULg; Bonnet, Pierre ULg et al

in Neurourology and Urodynamics (2004), 23(5-6), 428-429

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See detailLa philosophie de la réparation et le système pénal", Actes du Forum « La justice réparatrice à l’épreuve du carcéral
Dubois, Christophe ULg

in Actes du colloque "La justice réparatrice à l'épreuve du carcéral" (2004)

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See detailLa place de la recherche scientifique dans le tissu social
Laitat, E.; Marcoen, Jean Marie ULg

in Terre wallonne - Humains admis (2004), 8(2), 67-69

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See detailNovel markers reveal focal abnormalities of smooth muscles in human gastrointestinal motility disorders
Wedel, Theo; van Eys, G.; Waltregny, David ULg et al

Conference (2004)

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See detailAn immunohistochemical study of eosinophilic bronchopneumopathy in dogs.
Peeters, Dominique ULg; Day, M. J.; Clercx, Cécile ULg

in Proceedings of the 14th Annual Congress of the ECVIM-CA (2004)

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See detailReprésentations des réseaux de mots associés
Lejeune, Christophe ULg

in Purnelle, Gérald; Fairon, Cédrick; Dister, Anne (Eds.) Le poids des mots (2004)

Networks of associated words are used in qualitative data analysis software such as Candide, Réseau-Lu T-Lab on one side and Prospéro on the other side. The precise algorithm of both Candide and Prospéro ... [more ▼]

Networks of associated words are used in qualitative data analysis software such as Candide, Réseau-Lu T-Lab on one side and Prospéro on the other side. The precise algorithm of both Candide and Prospéro is described. Strength and limits of such a feature are compared with the gain it provides to social scientists. The paper concludes on a procedure helping to judge the adequacy and accuracy of categories of analysis constructed by the researcher. [less ▲]

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See detailPromotion des entrepreneurs ruraux en Asie du Sud-Est
Dogot, Thomas ULg; Duquesne, Brigitte ULg; Pham Van Bien et al

in Colloque international AIEA2 et Ateliers de la SCAE (Association internationale d’économie alimentaire et agro-industrielle, Société canadienne d’agroéconomie) : actes du colloque (2004)

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See detailGaseous emissions in the raising of weaned pigs on fully slatted floor or on straw-bases deep litter
Nicks, Baudouin ULg; Laitat, Martine ULg; Farnir, Frédéric ULg et al

in Clement, G.; Madec, F. (Eds.) Proceedings of the in- between congress of the International Society for Animal Hygiene (2004)

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See detailModelling of the wave propagation, the coastal currents and the induced topographic changes
Fraikin, Catherine; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Proceedings of the 9th International Symposium on River Sedimentation (2004)

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and ... [more ▼]

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and the reflection but also the energy dissipation caused by wave breaking. This model is solved by the numerical method of the finite volumes, using an iterative resolution (the GMRES method). Several validations of this model have been carried out on many examples such as harbors of various geometries and depths, beaches,… The wave induced currents are computed in the second part based on the concept of the radiation stresses describing the excess of the flux momentum caused by the waves. A model based on the complete Navier-Stokes equations integrated on the depth and associated with appropriated forcing and friction terms is used. This model is computed as an update of WOLF software (HACH, ULg) and is applied to some examples such as beaches with or without coastal structures. Finally, the third part is about the sediment transport. It exhibits the topographic modifications of the coastal sea bottom caused by the waves and their currents. A loop execution of these three models ends this work. It gives us an operational tool to describe the topographic evolution of the coastal areas caused by the incident waves, the induced currents and then the resulting sediment transport, fulfilling the objectives of this paper. [less ▲]

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See detailIsolation and analysis of a putative FLC orthologue in Sinapis alba L.
D'Aloia, Maria ULg; Melzer, Siegbert; Périlleux, Claire ULg

in Acta Physiologiae Plantarum (2004), 26(3), 23-24

In many plant species, flowering is promoted by a long exposure to low temperature, a process known as vernalization. Some plants even have an absolute requirement for winter cold before being able to ... [more ▼]

In many plant species, flowering is promoted by a long exposure to low temperature, a process known as vernalization. Some plants even have an absolute requirement for winter cold before being able to flower the next summer, hence behave as biennials or winter crops. A recent breakthrough in the understanding of the molecular bases of vernalization has been the cloning of the FLOWERING LOCUS C (FLC) gene in Arabidopsis thaliana (Michaels S.D. & Amasino R.M., 1999). FLC encodes a repressor of flowering and is downregulated by vernalization. So vernalization relieves the inhibitory role that FLC plays on downstream genes involved in the floral transition of the shoot apical meristem (SAM). Although vernalization has been shown, by physiological studies, to be sensed by the SAM, molecular evidences are missing. Such analyses are impaired in Arabidopsis by the small size of the plant and the rosette growth habit. We therefore cloned a FLC homologue in a caulescent relative Brassicaceae: mustard (Sinapis alba L.). We identified two clones by screening a cDNA library made from leaf mRNA. One of them, SaFLC1, was used for in situ hybridizations on SAM sections. Preliminary results are shown. Because of its agronomical importance, we have also tried to manipulate the vernalization process in crops. By using a transgenic approach, we have attempted to bypass the strict vernalization requirement of winter colza (Brassica napus L.). We have over-expressed SaMADS A, a gene which is repressed by FLC in wild type, and observed that the transgenics did not require vernalization any more. [less ▲]

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See detailComputation of the Malpasset dam break with a 2D conservative flow solver on a multiblock structured grid
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the 6th International Conference of Hydroinformatics (2004)

In the global framework of safety, the study of the hydraulic consequences of a dam breaking, sudden and instantaneous for concrete structures, gradual for earth ones, is of major interest in the scope of ... [more ▼]

In the global framework of safety, the study of the hydraulic consequences of a dam breaking, sudden and instantaneous for concrete structures, gradual for earth ones, is of major interest in the scope of prevention policies or protection plans for populations and goods. Suitable numerical models, coupled with contemporary computational possibilities, allow engineers to forecast these complex situations with a great reliability. In this field, WOLF 2D is an efficient analysis and optimisation tool, which has been completely developed by the Applied Hydrodynamics and Hydraulic Constructions team (HACH – http://www.ulg.ac.be/hach) of the University of Liege. It is part of WOLF free surface flows computation package, which includes in the same development environment the resolutions of the 1D Saint-Venant equations, the 2D shallow-water equations as well as a physically based hydrological model and powerful optimisation capabilities based on Genetic Algorithms. The interactive and unique user-interface, with high performance pre- and post-processing, allows monitoring 3-D large-scale runs graphically while they proceed, as well as generation of 3D videos. Each code handles general multiblock meshes, dealing with natural topography and mobile bed simultaneously, for any unsteady situation with mixed regimes and moving hydraulic jumps. By this way, WOLF deals with all free surface hydraulic phenomena, from hydrological runoff and river propagation to extreme erosive flows on realistic mobile topography, such as gradual dam breaching processes. It has moreover proved its efficiency and reliability for years by numerous real applications. The first part of this paper covers a brief description of the 2D multiblock flow solver WOLF 2D and the underlying mathematical model. The second part depicts the application of WOLF computation capabilities to the well-known Malpasset dam break (France, 1959), which induced a catastrophic almost instantaneous release of 48 millions m³ of water in the Reyran river valley down to the town of Frejus and the Mediterranean sea. Data available thanks to the CADAM EU-project are used to assess the results. [less ▲]

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See detailOperation rules determined by risk analysis for special protection systems at Hydro-Québec
Huang, Jinan; Vanier, Guy; Valette, Alain et al

(2004)

This paper describes a new approach used by Hydro-Québec to determine the rules of automatic devices installed in its main power plants to maintain secure operation under extreme contingencies. An example ... [more ▼]

This paper describes a new approach used by Hydro-Québec to determine the rules of automatic devices installed in its main power plants to maintain secure operation under extreme contingencies. An example of application of this approach is given to illustrate how to apply data mining technique for the rules of the automatic generator rejection and remote load shedding system (RPTC: Rejet de Production et Télédélestage de Charges in French) installed at the Churchill Falls hydroelectric power plant (5500 MW) in Labrador. Real time snapshots of the Hydro-Québec power system collected over several years data have been used to generate large amounts of results (database) by transient stability simulations. The database is processed by the data mining software developed by the University of Liege to construct the decision trees. This approach gives the most relevant parameters and finds optimal settings for the RPTC system at the Churchill Falls, minimizing the number of generator rejection while maintaining the same performance in terms of security coverage. New operation rules have thus been established. [less ▲]

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See detailFebrile convulsions: an update
Lagae, L.; Ceulemans, B.; Misson, Jean-Paul ULg

in Acta Neurologica Belgica (2004)

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See detailNonlinear energy pumpin: A new paradigm for vibration isolation
Vakakis, Alexander F.; McFArland, D. Michael; Kerschen, Gaëtan ULg et al

in 3rd China-Japan US Symposium on Health Mondial and Control of Structures, Dalian, 2004 (2004)

We discuss passive nonlinear energy pumping from a linear (main) mechanical structure to a weakly coupled, local, passive nonlinear energy sink (NES). We show that the NES can be designed to effectively ... [more ▼]

We discuss passive nonlinear energy pumping from a linear (main) mechanical structure to a weakly coupled, local, passive nonlinear energy sink (NES). We show that the NES can be designed to effectively absorb vibrational energy from the main structure in a one-way, irreversible fashion. We demonstrate the occurrence of pumping cascades, where an appropriately designed NES passively extracts energy sequentially from a number of modes of the main (linear) structure, interacting individually with each mode before moving to the next. Experimental results confirm our theoretical findings. The applications of the nonlinear energy pumping phenomenon to the problem of vibration and shock isolation will be discussed. [less ▲]

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See detailSTAT5 promotes granulocyte survival during lung inflammation
Fievez, Laurence ULg; Desmet, Christophe ULg; Seumois, G. et al

in Proceedings: 22nd Symposium of the Veterinary and Comparative Respiratory Society (2004)

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See detailWhither dynamic congestion management ?
Wehenkel, Louis ULg

(2004)

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See detailMédecine grecque et papyrologie : bilan et perspectives
Marganne, Marie-Hélène ULg

in Leclant, Jean; Jouanna, Jacques (Eds.) Actes du XIVe Colloque de la Villa grecque Kérylos "La Médecine grecque antique" organisé à Beaulieu-sur-mer, les 10 et 11 octobre 2003 (2004)

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See detailEffects of atmospheric turbulence on the GENIE nulling interferometer
Absil, Olivier ULg

in Aime, Claude; Soummer, Rémi (Eds.) Astronomy with High Contrast Imaging II (2004)

Two competitive design studies for the Ground-based European Nulling Interferometer Experiment (GENIE) have recently been initiated by the European Space Agency and the European Southern Observatory. A ... [more ▼]

Two competitive design studies for the Ground-based European Nulling Interferometer Experiment (GENIE) have recently been initiated by the European Space Agency and the European Southern Observatory. A major issue in these studies is the influence of atmospheric turbulence on the performance of the instrument, and how atmospheric effects can be compensated in order to reach the goal performance (detection of faint exozodiacal clouds). In this paper, we review the main atmospheric processes affecting a nulling interferometer and discuss possible ways to reduce them by means of real-time control systems. Preliminary performance estimates of GENIE are then presented. The effects of the thermal background and its fluctuations (Absil & Bakker 2004) are not considered here. [less ▲]

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See detailPreventive vs. emergency control of power systems
Wehenkel, Louis ULg; Pavella, Mania ULg

(2004)

A general approach to real-time transient stability control is described, yielding various complementary techniques: pure preventive, open loop emergency, and closed loop emergency controls. The ... [more ▼]

A general approach to real-time transient stability control is described, yielding various complementary techniques: pure preventive, open loop emergency, and closed loop emergency controls. The organization of the resulting control schemes is then revisited in order to make it able to cover static and voltage security, in addition to transient stability. Distinct approaches for preventive and emergency operating conditions are advocated. [less ▲]

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See detailL'octréotide LP dans le traitement des ophtalmopathies basedowiennes incipiens : Evaluation prospective VS placebo
Wemeau, J. L.; Caron, P.; Rohmer, V. et al

in XXIème Congrès de la Société Française d'Endocrinologie - Abstract book (2004)

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See detailLarge scale 2D numerical modelling of reservoirs sedimentation and flushing operations
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Proceedings of the 9th International Symposium on River Sedimentation (2004)

The quasi-3D flow solver WOLF has been developed at the University of Liege for almost a decade. It has been used to carry out the simulation of silting processes in large reservoirs and to predict the ... [more ▼]

The quasi-3D flow solver WOLF has been developed at the University of Liege for almost a decade. It has been used to carry out the simulation of silting processes in large reservoirs and to predict the efficiency of flushing operations. Besides briefly depicting the mathematical and numerical model, the present paper demonstrates its applicability on the case of a large hydropower project in India. The silting process of the reservoir has been simulated by means of the quasi-3D flow model with a quasi-steady approach. For simulating flushing events, both the topography changes and their interactions with the flow have been carefully handled in a strongly coupled approach. This narrow coupling has required the development of a suitable upwind numerical scheme. Results are presented with 2D- and 3D-views, completed by cross-sections and curves of the variation of key variables. The numerous observations based on those results lead to a global assessment of the silting mechanism and of the flushing efficiency. [less ▲]

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See detailStudy of surface active properties and thermal behaviour of enzymatically prepared sugar esters
Blecker, Christophe ULg; Deroanne, Claude; Lognay, Georges ULg et al

in Proceedings "Cosm'ing 2004 : Cosmetic Ingredients and Biotechnology" (2004)

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See detailSubcellular localization of the Bovine Leukemia Virus (BLV) R3 and G4 accessory proteins in BLV producing cells.
Dimitrov, P.; Russev, Russi; Shikova, E. et al

Poster (2004)

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See detailEvaluation of the function of ADAMTS-2, a metalloproteinase containing a disintegrin domain and thrombospondin type I repeats, during angiogenesis in vitro and in vivo
Kesteloot, Frédéric ULg; Lapière, Charles M; Colige, Alain ULg et al

in Acta Clinica Belgica (2004), 59(2), 120

Angiogenesis is required for development, growth, tissue remodeling, and wound healing. Pathologies such as diabetic retinopathy, rheumatoid arthritis and cancer would benefit from therapies controlling ... [more ▼]

Angiogenesis is required for development, growth, tissue remodeling, and wound healing. Pathologies such as diabetic retinopathy, rheumatoid arthritis and cancer would benefit from therapies controlling and reducing angiogenesis. Enzymes of the ADAMTS family are closely related to MMPs and ADAMs. They contain however some specific features, such as a variable number of domains known as “ThromboSpondin type I repeat” (TSPI). ADAMTS-1 and -8 are 20-fold more anti-angiogenic than angiostatin and endostatin, two potent inhibitors of angiogenesis. The primary function of ADAMTS-2 is the maturation of collagen type I and II molecules by excising the amino-propeptide. In addition, ADAMTS-2 could also modulate angiogenesis, as it contains the same sequences than those responsible for the anti-angiogenic activity of ADAMTS-1 and -8. This hypothesis was investigated in vitro in different experimental models such as cell proliferation and formation of capillary structures by human endothelial cells. An ex vivo angiogenesis model was also used. It consists in mice or rat aorta pieces embedded in a collagen gel in order to allow the growth of capillaries from the vascular endothelium. As compared to control mice (TS2+/+), angiogenesis was slightly increased, in absence of ADAMTS-2, from aortas of ADAMTS-2 KO mice (TS2-/-). Using rat aortas, addition of recombinant ADAMTS-2 reduced the formation of capillary structure, also confirming the anti-angiogenic activity of ADAMTS-2. Finally, an in vivo model of angiogenesis was also used. Biocompatible sponges (Ivalon) were implanted under the skin of TS2+/+ or TS2-/- mice in order to evaluate the formation of capillaries in the granulation tissue invading the sponge. In absence of ADAMTS-2, angiogenesis and granulation tissue formation were both reduced. Additional investigations are being performed in order to identify the underlying mechanism(s) inducing these modifications. [less ▲]

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See detailLate Frasnian Atrypida (Brachiopoda) from the Ardenne shelf (southern Belgium)
Mottequin, Bernard ULg

in Anonymous (Ed.) Abstracts with programme of the 48th Palaeontological Association Annual Meeting (2004)

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See detailQuantification of lipid bilayer effective microviscosity and fluidity effect induced by propofol
Bahri, Mohamed Ali ULg; Heyne, B.; Hans, P. et al

Conference (2004)

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See detailDesign and pharmacological evaluation of recently developed 6-substituted 3-bromophenyl 2-oxo-2H-1-benzopyran 3-carboxylate derivatives as putative inhibitors of cell invasion
Kempen, I.; Frankenne, F.; Telliez, A. et al

in Fundamental & Clinical Pharmacology (2004)

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See detailDistribution of the forces in a bolted connection under shear loading
Pietrapertosa, C.; Piraprez, E.; Jaspart, Jean-Pierre ULg

in Proceedings of the Fifth International Workshop on Connections (2004)

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See detailBias-variance tradeoff of soft decision trees
Olaru, Cristina; Wehenkel, Louis ULg

(2004)

This paper focuses on the study of the error composition of a fuzzy decision tree induction method recently proposed by the authors, called soft decision trees. This error may be expressed as a sum of ... [more ▼]

This paper focuses on the study of the error composition of a fuzzy decision tree induction method recently proposed by the authors, called soft decision trees. This error may be expressed as a sum of three types of error: residual error, bias and variance. The paper studies empirically the tradeoff between bias and variance in a soft decision tree method and compares it with the tradeoff of classical crisp regression and classification trees. The main conclusion is that the reduced prediction variance of fuzzy trees is the main reason for their improved performance with respect to crisp ones. [less ▲]

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See detailUne définition opérationnelle de la Métacognition et ses mises en oeuvre
Leclercq, Dieudonné ULg; Poumay, Marianne ULg

in 21e colloque de l'Association Internationale de Pédagogie Universitaire (A.I.P.U.) Université Cadi Ayyad de Marrakech (Maroc). "L'AIPU : 20 ans de recherches et d'actions pédagogiques; bilan et perspectives." (2004)

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See detailHDAC8 is required for myofibroblastic differentiation induced by TGFß
Glénisson, Wendy; Tran, Syv Li; Castronovo, Vincenzo ULg et al

Conference (2004)

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See detailLandscape ecology: focus on spatio-temporal patterns.
Bogaert, Jan ULg

Conference (2004)

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See detailStudy of the role and origin of endotoxemia in the pathogenesis of respiratory distress syndrome in the newborn calf.
Aliaoui, Hamani; Danlois, Fabien; Guyot, Hugues ULg et al

Poster (2004)

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See detailDIOXIN BODY BURDEN AMONG BLOOD DONORS BEFORE AND AFTER THE BELGIAN DIOXIN/PCB INCIDENT
Debacker, Noemi; Sasse, André; Van Wouwe, Nathalie et al

in Organohalogen Compounds (2004)

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See detailSolute contaminant transport in variably saturated dual-porosity/ dual permeability chalk: field tracer experiments and modelling
Brouyère, Serge ULg

in Aagaard, Per; Bedbur, Eckart; Bidoglio, Giovanni (Eds.) et al Saturated & unsaturated zone: integration of process knowledge into effective models - COST Action 629 Workshop (2004)

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See detailActivity-Stability Relationships in Extremophilic Enzymes
D'Amico, Salvino ULg

Conference (2004)

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See detailA set of efficient numerical tools for floodplain modelling
Archambeau, Pierre ULg; Dewals, Benjamin ULg; Detrembleur, Sylvain ULg et al

in Jirka, G. H.; Uijttewaal, W. S. J. (Eds.) Shallow flows (2004)

In the last years, Europe was subject to catastrophic inundations. At the same time, computer's capacity are increasing such as bidimensional simulations can be applied to real cases. Two compementary ... [more ▼]

In the last years, Europe was subject to catastrophic inundations. At the same time, computer's capacity are increasing such as bidimensional simulations can be applied to real cases. Two compementary theoretical and numerical models are presented and discussed in the present paper: the diffusive approximation and the complete shallow-water approach. An original refinement of meshes is also presented to increase the convergence speed to a steady solution. Numerous comparisons between models and methods of resolution are described. Finally, an example of determination of the flood extension on a natural river is illustrated. [less ▲]

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See detailEglises liégeoises en chantier au XIIIe et au XIVe siècle
Hoffsummer, Patrick ULg; Tourneur, Francis; Eeckhout, Jérôme ULg et al

in Van den Bossche, Benoît (Ed.) La cathédrale gothique Saint-Lambert à Liège, une église et son contexte (2004)

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See detailSensor Validation for On-line Vibration Monitoring
Kerschen, Gaëtan ULg; De Boe, Pascal; Golinval, Jean-Claude ULg et al

in 2nd European Workshop on Structural Health Monitoring, Munich, 2004 (2004)

For a reliable on-line vibration monitoring of structures, it is necessary to have accurate sensor information. However, sensors may sometimes be faulty or may even become unavailable due to failure or ... [more ▼]

For a reliable on-line vibration monitoring of structures, it is necessary to have accurate sensor information. However, sensors may sometimes be faulty or may even become unavailable due to failure or maintenance activities. The problem of sensor validation is therefore a critical part or structural identification. The objective of the present study is to present a procedure based on principal component analysis, which is able to perform detection, isolation and reconstruction of a faulty sensor. Its e ciency is assessed using an experimental application. [less ▲]

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See detailScale modelling and similarity laws for the study of an under pressure settling structure
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Proceedings of the 9th International Symposium on River Sedimentation (2004)

This paper presents the scale model studies of a complex under pressure settling structure, carried out at the Laboratory of Hydraulic Constructions of the University of Liège. Made up of fourteen ... [more ▼]

This paper presents the scale model studies of a complex under pressure settling structure, carried out at the Laboratory of Hydraulic Constructions of the University of Liège. Made up of fourteen identical settling chambers placed side by side and the bottom of which is divided into pyramidal hoppers, the structure, totally under pressure, is fed by a vertical shaft. Downstream, the settling chambers discharge into a collector, which ensures the clean water feeding of four penstocks through a free surface basin. Finally, a pipes network, under the chambers, ensures the downstream evacuation of the sand trapped in the hoppers. Using adapted and theoretically justified similarity laws coupled with realistic scales for the models, the hydrodynamic behavior and solid transport phenomena in this complex system have been studied. Special care has been taken to evaluate the trap efficiency, the evacuation system working and the global discharge repartition between the fourteen chambers. Sawdust, plastic balls or very small sand particles have been used to model real sediments. A total of three models, from only one hopper to the full settling structure, have been built, with scales from 1/18.5 to 1/100. According to the results of the studies, the length of the settling chambers has been shortened of up to 38 meters, i.e. 2 hoppers, and best use instructions have been suggested for the sediment evacuation system. [less ▲]

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See detailImpacts of elevated CO2 on net nitrification and on the community structure of ammonia oxidising bacteria
Malchair, Sandrine ULg; Carnol, Monique ULg

in Biodiversity: state, stakes and future; 7,8 & 9 April 2004, Louvain-la-Neuve, Belgium, Symposium, Programme, Abstracts, Participants (2004)

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See detailUltrasonography and MRI of the equine digit
Busoni, Valeria ULg; Bolen, Géraldine ULg

Conference (2004)

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See detailL'assurance contre la perte de revenus en Région wallonne
Paris, Catherine ULg

in Lecocq, Pascale (Ed.) Actualité législative en droit immobilier (2004)

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See detailValidation of a quasi-2D model for aerated flows over stepped spillways for mild and steep slopes
Dewals, Benjamin ULg; André, Stéphanie; Schleiss, Anton et al

in Proceedings of the 6th International Conference of Hydroinformatics (2004)

A quasi-2D model of aerated flow over stepped slopes has been developed, taking into account the non-uniform velocity profile and the air transport processes. The paper presents the mathematical approach ... [more ▼]

A quasi-2D model of aerated flow over stepped slopes has been developed, taking into account the non-uniform velocity profile and the air transport processes. The paper presents the mathematical approach, the numerical model and its validation. [less ▲]

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See detailLevels of contamination for various pollutants present in Belgian human plasma
Van Wouwe, Nathalie; Covaci, Adrian; Kannan, Kurunthachalam et al

in Organohalogen Compounds (2004)

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See detailProper Orthogonal modes for the characterisation of nonlinear dynamic systems
Kerschen, Gaëtan ULg; Lenaerts, Vincent; Golinval, Jean-Claude ULg et al

in Euromech Colloquim on Nonlinear Modes of Vibrating Systems, Frejus, 2004 (2004)

Modal analysis is extensively used for the analysis and design of structures. However, a major concern for structural dynamicists is that its validity is limited to systems showing a linear behaviour. New ... [more ▼]

Modal analysis is extensively used for the analysis and design of structures. However, a major concern for structural dynamicists is that its validity is limited to systems showing a linear behaviour. New developments have thus been proposed in order to tackle nonlinear systems among which the theory based on the nonlinear normal modes is indubitably the most appealing. In this study, a different approach is adopted and the modes extracted from the proper orthogonal decomposition are considered for the characterization of nonlinear systems. [less ▲]

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See detailDynamic approach of structural fire calculation with FEM software
Vassart, Olivier; Cajot, Louis-Guy; Franssen, Jean-Marc ULg et al

in Proc. 5th International Conference on Performance-Based Codes and Fire Safety Design Methods (2004)

This paper explains how the dynamic approach has been implemented in the computer software SAFIR in order to cope with temporary and local failures that occured in a step be step static analysis of ... [more ▼]

This paper explains how the dynamic approach has been implemented in the computer software SAFIR in order to cope with temporary and local failures that occured in a step be step static analysis of structures subjected to fire.By means of this recently implemented dynamic algorithm, it’s now possible to simulate the complete failure mechanism, to predict the influence of a local failure on the global behaviour of the structure and to follow eventually the progressive collapse. Therefore the resistance time is now really determined whereas in the past many numerical failure corresponding to local failure were interpreted as resistance time of the whole structure. [less ▲]

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See detailAdipocyte fatty acid-binding protein expression and mitochondrial activity as indicators of intramuscular fat content in young bulls
Barnola, I.; Hocquette, J. F.; Jurie, C. et al

in Book of Abstracts of the 55th Annual Meeting of the European Association for Animal Production (2004)

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