References of "Scientific congresses and symposiums"
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See detailInfluence de la substitution du tourteau de soja par des graines de lupin, avec ou sans complément d'alpha-galactosidase, sur la digestibilité des régimes et la rétention azotée du porc en croissance
Froidmont, Eric; Schoeling, Olivia; Deliège, Françoise et al

in Journées Recherche Porcine (2003)

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See detailEGF amplifies the replacement of parvalbumin-expressing striatal neurons after ischemia
Teramoto, Tetsuyuki; Qiu, Jianhua; Plumier, Jean-Christophe ULg et al

Poster (2003)

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See detailEvolution de la consommation de viande bovine en Belgique
Duquesne, Brigitte ULg; Lebailly, Philippe ULg

in 10 èmes Rencontres, Recherche, Ruminants (2003)

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See detailLe japonisme en Belgique à la fin du XIXe siècle. Le cas d’Armand Rassenfosse
Bawin, Julie ULg

in 6e congrès de l’Association des cercles francophones d’histoire et d’archéologie de Belgique, LIIIe congrès de la fédération des cercles d’archéologie et d’histoire de Belgique (2003)

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See detailPhotometric Mode Identification in the Two Doradus Stars HD 12901 and HD 48501
Aerts, C.; Cuypers, J.; Dupret, Marc-Antoine ULg et al

in Asteroseismology Across the HR Diagram (2003)

Not Available

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

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

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See detailLevels of selected PBDEs and PCBs in Belgian human milk
Pirard, C.; De Pauw, Edwin ULg; Focant, Jean-François ULg

in Organohalogen Compounds (2003), 61

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See detailNouveau concept algorithmique pour un modèle de laminage à froid en régime mixte
STEPHANY, A.; Ponthot, Jean-Philippe ULg; COLLETTE, C. et al

in Proceedings of the 6ème colloque national en calcul des structures (2003)

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See detailLingopti project: semi-continuous casting process of coper-nickel alloys
Pecquet, Etienne ULg; Pascon, Frédéric ULg; Lecomte-Beckers, Jacqueline ULg et al

in Dick, E.; Vierendeels, J.; Cantrijn, F. (Eds.) et al Proceedings of the 6th national congress on theoretical and applied mechanics (2003)

Lingopti project is a First Europe project. It treats semi-continuous casting of copper-nickel alloys ingots. The research, performed in the University of Liège, consists in the optimisation of the mould ... [more ▼]

Lingopti project is a First Europe project. It treats semi-continuous casting of copper-nickel alloys ingots. The research, performed in the University of Liège, consists in the optimisation of the mould and the whole casting process of the LBP S.A. company (Chênée – Liège) to obtain better cast products. In fact, cast products sometimes present long oscillation marks (λ ≈ 500mm) and some ingots have many internal cracks. The semi-continuous process consists in the vertical casting of 7m height ingots. The goal is also to test different chemical compositions of the material and to predict what happens on the casting process. [less ▲]

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See detailSoft tissue imaging of the palmar aspect of the equine podotrochlear apparatus.
Busoni, Valeria ULg; Lahaye, B.; Jamar, M. et al

Conference (2003)

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See detailNumerical - experimental interaction in hydrodynamics: an integrated approach for the optimal management of hydraulic structures and hydrographic basins
Pirotton, Michel ULg; Lejeune, André ULg; Archambeau, Pierre ULg et al

in Lu; Lamas; Li (Eds.) et al Computational Methods in Engineering and Science (2003)

The present paper presents studies and tools devoted to the reduction of uncertain-ties in the scientific knowledge of various unsteady flows, including solid transport effects, in the perspective of ... [more ▼]

The present paper presents studies and tools devoted to the reduction of uncertain-ties in the scientific knowledge of various unsteady flows, including solid transport effects, in the perspective of applications such as restoration, rehabilitation and enhancement of riverbeds, rivers and waterways. This global approach will be tested and fitted in a dynamic and integrated experimental model of reference flows in the laboratory. The relevance of using of physical experimental scale models will be highlighted for the identification of constitutive laws used in numerical modelling. Practical applications prove that the integration of powerful hydrodynamic software for water management is realistic and will lead to compute transient flooding, sedimentation and erosion events in natural compound channels, as well as to design and simulate the behaviour of hydraulic regulation works or locks. It will also help in working out new projects or reconstructions of hydraulic infrastructures, as well as ecological rehabilitations. Even if the sole quantitative plan will be taken into account, this opti-misation project will also lead to highlight favourable solutions, from a qualitative point of view. [less ▲]

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See detailQuantification of the role of mechanical parameters on the bone response around loaded titanium implants
Vandamme, Katleen; Geris, Liesbet ULg; Duyck, Joke et al

in European Cells and Materials (2003), 5(2), 96-97

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See detailCloning and identification of functional domains in quail Brain aromatase
Charlier, Thierry ULg; Baillien, Michelle; Ball, Gregory F. et al

Poster (2003)

Recent evidence indicates that aromatase activity (AA) in the hypothalamus is not only modulated by slow (hours to days) genomic actions but also through fast (seconds to minutes) non-genomic mechanisms ... [more ▼]

Recent evidence indicates that aromatase activity (AA) in the hypothalamus is not only modulated by slow (hours to days) genomic actions but also through fast (seconds to minutes) non-genomic mechanisms. We recently showed that Calcium (Ca2+)-dependent phosphorylations catalyzed by multiple protein kinases including PKC, and possibly PKA and CAMK, rapidly down-regulate AA in quail hypothalamic homogenates. Western blotting experiments also indicated that phosphorylations affect the aromatase molecule itself but it was impossible to fully characterize the putative phosphorylation sites on the quail enzyme because its sequence was unknown. We therefore cloned and sequenced the quail brain aromatase. We identified a 1541-bp open reading frame that encodes a predicted 490-amino acid protein containing all functional domains previously described in mammalian and other avian aromatases. Multiple motifs match consensus sequences corresponding to several protein kinases including those that were shown to affect AA during pharmacological experiments with specific kinase inhibitors (e.g., PKC, PKA, MAPK, Myosine light chain kinase, Tyr. kinase). Another potential control pathway of AA, independent from phosphorylations, could involve a direct control by Ca2+-dependent calmodulin (CAM), as suggested by the identification in Western blots of CAM on purified aromatase from quail hypothalamic homogenates. Accordingly, two Ca2+-dependent calmodulin binding motifs (1-8-14b) as defined by Rhoads and Friedberg (FASEB, 1997, 11:331-340) are present and conserved in most vertebrates including quail aromatase. These results suggest that the phosphorylation of some residues as well as the direct binding of calmodulin on the aromatase protein represent part of the mechanism(s) underlying the rapid changes in AA. [less ▲]

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See detailEvolutionary ecology of paedomorphosis in the Alpine newt Triturus alpestris
Denoël, Mathieu ULg

Conference (2003)

Paedomorphosis, in which individuals retain ancestral characteristics in the adult stage, is widespread in newts and salamanders and is suspected to play an important role in evolution. In some species ... [more ▼]

Paedomorphosis, in which individuals retain ancestral characteristics in the adult stage, is widespread in newts and salamanders and is suspected to play an important role in evolution. In some species, paedomorphosis is facultative with some individuals skipping the metamorphic stage. Dimorphic populations of the Alpine newt inhabit a large variety of aquatic habitats such as permanent lakes and temporary ponds. The aim of this study was to determine the benefits of the alternatives in these different habitats. To this end, I focused on resource partitioning, energy intake, body condition and age structures in different populations composed of the two morphs. In deep lakes, there was a substantial trophic differentiation between morphs. Paedomorphs primarily preyed on plankton whereas metamorphs foraged on terrestrial invertebrates that fell to the water surface. By reducing competition, resource partitioning may contribute to the coexistence of the alternative morphs in heterogeneous habitats. On the contrary, in a small pond, resource use was similar in the two morphs. Maturity is reached earlier in the paedomorphs from this small pond than in metamorphs (progenetic process), favoring then a rapid turn-over of the population, while similar gonadal development was observed in one of the deep lakes (neotenic process). Body condition was generally higher in paedomorphs than in metamorphs in each studied population. These results show that facultative paedomorphosis is adaptive in varied habitats, but that different factors may favor it depending of the characteristics of the environment. Paedomorphic phenotypes can thus be selected in low altitude productive ponds and high altitude oligotrophic lakes. [less ▲]

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See detailProduction of selenium-enriched grass and haylage by mineral fertilisation in southern Belgium
de Behr, V.; Coenen, M.; Hambuckers, Alain ULg et al

in Proceedings of 7th Conference of the European Society of Veterinary and Comparative Nutrition (2003)

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See detailA Modified Tetris Model Including The Effect of Friction
Ludewig, François ULg; Dorbolo, Stéphane ULg; Caps, Hervé ULg et al

in Traffic and Granular Flow'03 (2003)

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

Poster (2003)

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See detailLa sous-traitance: développements récents
Kohl, Benoît ULg

in Vanwijck, Michèle (Ed.) Contrat d'entreprise et droit de la construction (2003)

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See detailAnalyse de stabilité linéaire d'un ferrofluide saturant un milieu poreux en rotation
Desaive, Thomas ULg; Hennenberg, M.; Dauby, Pierre ULg

in congrès français de mécanique (2003)

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See detailCaracterization del comportamiento mecanico de aceros para embuticion profunda
GARCIA, C.; CELENTANO, D.; Ponthot, Jean-Philippe ULg

in Proceedings of the joint conference Jornadas SAM, el Congreso Nacional de Metalurgia y Materiales de Chile (2003)

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See detailScreening of histone deacetylase (HDAC) expression profiles in prostate cancer tissues leads to the identification of HDAC8 as a novel marker of smooth muscle differentiation
Waltregny, David ULg; Glénisson, Wendy; Tran, Syv Li et al

Conference (2003)

Background: Histone deacetylation mediated by histone deacetylases (HDAC) plays a key role in the regulation of gene expression. Inhibition of HDAC activity is associated with profound alterations in ... [more ▼]

Background: Histone deacetylation mediated by histone deacetylases (HDAC) plays a key role in the regulation of gene expression. Inhibition of HDAC activity is associated with profound alterations in cellular biology, such as cell growth arrest, apoptosis and differentiation. It has been hypothesized that altered HDAC expression and/or activity could play a role in cancer development and progression. Objectives: To investigate this possibility, we undertook a study in which we screened HDAC expression profiles in human prostate cancer. In addition, we sought to determine the specific biological effects of selected HDACs. Methods: A variety of techniques, including immunochemistry, Q-RT-PCR, and immunobloting, were used to examine the expression of several class I and class II HDACs in human prostate cancer cell lines and matched malignant and non-malignant prostate tissues. Analysis of the specific biological effects of selected HDACs was performed after knocking down their expression with the use of specific small interfering RNAs (siRNA) and/or after forcing their overexpression by transfection of the cDNAs of interest. Results: Normal prostate epithelial and stromal cells displayed distinct HDAC expression profiles, suggesting specific functions for these enzymes in the prostate. Human prostate cancer cells did not exhibit significant alterations in the abundance of any of the HDAC enzymes analyzed. One of the HDACs tested, herein referred to as HDACX, was specifically expressed, in vivo, by cells showing smooth muscle phenotype, including vascular and prostate smooth muscle cells and myoepithelial cells. HDACX expression co-localized with the expression of the specific smooth muscle marker alpha smooth muscle actin (alpha-SMA) in all human tissues tested. Nucleo-cytoplasmic fractionation experiments showed that HDACX was mainly expressed in the cytosol of human smooth muscle cells (HSMC) obtained from umbilical cord veins. Transfection experiments leading to overexpression of HDACX in mouse fibroblasts indicated that the enzyme was detected both in the cytosol and in the nucleus. By immunocytochemistry, it was observed that HDACX pattern of expression was reminiscent of actin stress fibers, suggesting that this HDAC may be involved in the regulation of the smooth muscle cell cytoskeleton. Trichostatin A (TSA), a specific global HDAC inhibitor, as well as specific HDACX siRNAs, were able to completely prevent the TGFß1-induced differentiation of fibroblasts into myofibroblasts, as assessed by alpha-SMA abundance. Forced downregulation of HDACX by siRNAs in HSMC caused a dramatic reduction in their contraction capacity, as determined with the use of hydrated collagen lattices contraction assays. Conclusions : HDACs diplay distinct expression profiles among normal prostate epithelial and stromal cells. The abundance of the HDACs analyzed in this study is not altered in prostate cancer. Further experiments are required to determine whether the activity of these enzymes is altered in prostate cancer. We have identified for the first time an HDAC that (i) is specifically expressed in cells showing smooth muscle phenotype, (ii) is required for myofibroblastic differentiation, and (iii) is involved in smooth muscle cell contraction. This HDAC may become a target for the therapy of several pathological conditions, including chronic inflammation and cancer, in which myofibroblasts play a major role. [less ▲]

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

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

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See detailA comparative analysis of non-fickean thermodiffusion by EIT and GENERIC
Lebon, Georgy ULg; Desaive, Thomas ULg; Colinet, P.

in 1st international exergy, energy and environment symposium (2003)

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See detailLe syndrome de détresse respiratoire chez le veau nouveau-né : la clé de l’énigme?
Rollin, Frédéric ULg; Danlois, Fabien; Aliaoui, Hamani et al

in Proceedings: De la recherche à la clinique, Société Française de Buiatrie (2003)

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See detailPerspectives in data fusion between x-ray computed tomography and electrical capacitance tomography in an absorption column
Toye, Dominique ULg; L'Homme, Guy ULg; Crine, Michel ULg et al

in Dyakowski, T.; Kantzas, A.; Ronson, P. (Eds.) Proceedings of 3rd World Congress on Industrial Process Tomography, Banff, Canada, 2-5 septembre 2003 (2003)

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See detailAnti-inflammatory effect of natural proanthocyanidins: pharmacological evaluation on in vivo models.
Garbacki, Nancy ULg; Tits, Monique ULg; Damas, Jacques ULg

in Pflügers Archiv : European Journal of Physiology (2003), 446

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See detailIn vivo detection of three Microsporum canis subtilisin-like serine protease mRNAs in infected guinea-pigs
Descamps, F.; Brouta, F.; Vermout, S. et al

Conference (2003)

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See detailNumerical simulation of peri-implant tissue differentiation in a bone chamber
Geris, Liesbet ULg; Van Oosterwyck, Hans; Andreykiv, A. et al

in European Cells and Materials (2003), 5(2), 16-17

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See detailActivation and inactivation of bradykinin in rats.
Damas, Jacques ULg; Garbacki, Nancy ULg

in Pflügers Archiv : European Journal of Physiology (2003), 446

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

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

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See detailLe contrôle de la pression artérielle chez le patient greffé rénal
Ait Oile, Fatima; Saint-Remy, Annie ULg; Weekers, Laurent ULg et al

in Archives des Maladies du Coeur et des Vaisseaux (2003), 96

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See detailModeling of the influence of electric forces on mechanical structures
Rochus, Véronique ULg; Duysinx, Pierre ULg; Golinval, Jean-Claude ULg

Conference (2003)

This paper is a summary concerning the modeling of the strong electro-mechanical coupling appearing in micro-electro-mechanical systems (MEMS). These systems are very small devices (typical size of a few ... [more ▼]

This paper is a summary concerning the modeling of the strong electro-mechanical coupling appearing in micro-electro-mechanical systems (MEMS). These systems are very small devices (typical size of a few microns), in which electric phenomena as well as mechanical and dynamical phenomena exist. The finite element method is used to discretize simultaneously the electrostatic and mechanical fields. The formulation is consistently derived from variational principles based on the electro-mechanical free energy. In classical weakly coupled formulations staggered iteration is used between the electrostatic and the mechanical domain. Therefore, in those approaches, linear stiffness is evaluated by finite differences and equilibrium is reached typically by relaxation techniques. The strong coupling formulation presented here allows to derive exact tangent matrices of the electro-mechanical system. Thus it allows to compute non-linear equilibrium positions using Newton- Raphson type iterations combined with adaptive meshing in case of large displacements. Furthermore, the tangent matrix obtained in the method considered in this paper greatly simplifies the computation of vibration modes and frequencies of the coupled system around equilibrium configurations. The non-linear variation of frequencies with respect to voltage and stiffness can then be investigated until pull-in appears. In order to illustrate the effectiveness of the proposed formulation numerical results are shown first for the reference problem of a simple flexible cap acitor, then for the model of a micro-bridge. [less ▲]

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See detailFollow-up of iron microalbuminuria in hypertensive patients: a belgian promise survey
Bovy, Christophe ULg; Beguin, Yves ULg; Gothot, André ULg et al

in Acta Clinica Belgica (2003), 58-3(4), 328

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See detailInvestigation of the Biological Activity and the Environmental Impact of Tunisian MSW Landfills
Mhiri, F.; Marouani, L.; Benzarti, A. et al

in Christensen; Cossu; Stegmann (Eds.) Proceedings Sardinia 03, Ninth International Waste Management and Landfill Symposium (2003)

This paper presents the results of the investigation of the biological activity that takes place in three municipal solid waste landfills (MSW landfills) situated in different regions of two dry climate ... [more ▼]

This paper presents the results of the investigation of the biological activity that takes place in three municipal solid waste landfills (MSW landfills) situated in different regions of two dry climate in Tunisia. Since the climatic water balance is negative (potential evapotranspiration being 1.5 to 5 times higher than rainfall), it has often been considered that this kind of landfill has neither environmental impact nor efficient biological activity. However, the three landfills revealed a biological activity with biogas often containing more than 60 percent of methane. Indeed, the upper waste layer that was effectively dry (dry weight from 85 to 98%), the core of refuse contained between 35 and 65% of dry matter. In some boreholes, the produced gases periodically expelled leachates like small geysers. Therefore, the results assess that landfill management in countries with dry climate should be considered with adapted technologies, not necessary the same as under temperate or humid climates. [less ▲]

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See detailHypochromic mature erythrocytes: a specific marker of iron deficiency
Bovy, Christophe ULg; Beguin, Yves ULg; Gothot, André ULg et al

in Acta Clinica Belgica (2003), 58-3(4), 325

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See detailImpacts of management strategies on nutrient fluxes in a temperate Picea abies (L. Karst) plantation
Carnol, Monique ULg

in Jansen, Jörg; Spiecker, Heinrich; von Teuffel, Konstantin (Eds.) Berichte Freiburger Forstliche Forschung, Heft 47, The question of conversion of coniferous forests, Abstracts, International Conference, 27 Septembre - 02 october, 2003, Freiburg im Breisgau, Germany (2003)

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See detailKarsts en roches non carbonatées - l'exemple des quartzites et des itabérites de Minas Gerais, Brésil
Willems, Luc ULg; Rodet, Joël; Auler, Augusto et al

in Rodet, Joël (Ed.) Actes des Journées Européennes de l'AFK 2003 (2003)

The state of Minas Gérais, Brazil, contains numerous karsts booth inside carbonated and non carbonated rocks. Différent caves are found in quartzite and Itaberite formations (Banded Iron formation). The ... [more ▼]

The state of Minas Gérais, Brazil, contains numerous karsts booth inside carbonated and non carbonated rocks. Différent caves are found in quartzite and Itaberite formations (Banded Iron formation). The term karst is used in the meaning of "any features of the classical karst morphology (caves, sink-holes, lapies...) where dissolution plays the main genetically action and this in any kind of rocks". In some areas, lapiaz and kamenitza affect wide landscapes (area of Diamantina, Natural Parc of Rio Preto). Several caves are found and some of these are several kilomeetres long (grutta do Bromelias, Natural Parc of Ibitipoca). Inside caves, we found numerous forms like dissolution alveoli, spelothems, .... Many times, the cave sides and solutional forms are covered by crust which solidify a very crumbly quartzite. Différent morphologies show an primary solutional stage of the rocks before a physical erosional stage which destroy the earliest forms (piping, river érosion, collapsing). [less ▲]

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See detailEvaluer des compétences en histoire : oui mais comment ?
Jadoulle, Jean-Louis ULg

in Beckers, Jacqueline (Ed.) Les outils d’évaluation des compétences disciplinaires dans l’enseignement secondaire. Actes de l’Université d’été (2003)

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See detailEvaluacion de la estabilidad de emulsiones alimentarias utilizado elmétodo optico Turbiscan.
Flores-Aguilar, E.; Lognay, Georges ULg; Blecker, Christophe ULg et al

in Proceedings "VI Congreso National de Ciencia y Tecnologia de Alimentos" (2003)

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See detailVisual urban space assessment from sky shape analysis
Teller, Jacques ULg; Sarradin, F.; Siret, D.

in Gnauck, A.; Heinrich, R. (Eds.) Informatics for Environmental Protection: The Information Society and Enlargement of the European Union (EnviroInfo 2003) (2003)

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See detailClinching joining system: validation of numerical models
Pietrapertosa, C.; Zhang, Lihong ULg; Habraken, Anne ULg et al

in Brucato, V. (Ed.) Proceedings of the 6th International ESAFORM Conference on Material Forming (2003)

The clinching process, also known as “press joining”, is a mechanical joining technique for sheet metal. Its basic principle is to clamp together several metal sheets by an impact extrusion between a ... [more ▼]

The clinching process, also known as “press joining”, is a mechanical joining technique for sheet metal. Its basic principle is to clamp together several metal sheets by an impact extrusion between a punch and a die. The joint is formed by a localized cold plastic deformation. Forming is used as a joining method. Within the context of this research, University of Liège is developing numerical models, with the FEM code LAGAMINE, that simulate the clinching process. On the other hand, shear tests on simple joints with one or two clinches were realized and their behaviour is reproduced numerically with LAGAMINE. This work opens the way to the analytical formulation of the behaviour of clinched joints. The article will focus on comparisons between experiments and numerical simulations. First, the identification of model parameters will be explained. Then, the predicted failure modes will be analysed by comparison with the xperiments. [less ▲]

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See detailIntoxications aiguës au méthanol et à l'éthylène glycol
Charlier, Corinne ULg

Conference (2003)

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See detailQuel est le "noyau dur" de la formation en géographie? Le point de vue d'un géographe climatologue.
Erpicum, Michel ULg

in Géographes associés , AFDG , Université Lyon II (2003), 27

Which geograpry to teach tomorrow at university? The point of view of a geographer working in climatology and topoclimatology.

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See detailIs the feeling of familiarity driven by weak recollection as well as by an independent familiarity mechanism?
Montaldi, Daniela; Bastin, Christine ULg; Venables, Louise et al

in Journal of Cognitive Neuroscience (2003), 15(Supplemental), 179

The aim of this experiment is to examine how recollection and familiarity change over time and whether there is a qualitative difference between familiar items that were previously recollected and items ... [more ▼]

The aim of this experiment is to examine how recollection and familiarity change over time and whether there is a qualitative difference between familiar items that were previously recollected and items that have always been familiar. It might be that, when an item is initially recollected and becomes just familiar after a delay, this form of familiarity is actually a weak and partial recollection, qualitatively different from mere familiarity. To address this issue, a task have been developed in which, at study, participants encoded two series of 100 pictures representing scenes under respectively shallow and deep encoding conditions. Memory for these pictures was tested by means of a yes-no recognition test. Recognised items were classified as recollected or as familiar. Half of the pictures from each encoding condition were tested after 10 minutes and the other half were tested after 2 days. The results indicated that recollection decreased after 2 days while familiarity increased (deep encoding condition) or did not change (shallow encoding condition). This suggests that, among the items judged as familiar after 2 days, some items would have been recollected after 10 minutes and some were initially already familiar. Because deep encoding produced a higher proportion of recollection at the 10-minute interval, the proportion of recollection-changed-into-familiarity responses should be greater in this condition than in the shallow encoding condition. Whether there is a qualitative difference between these responses and pure familiarity responses should be explored in a fMRI experiment. [less ▲]

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See detailAbsent Sketch Interface in Architectural Engineering
Leclercq, Pierre ULg

in Proceedings of the 5th IAPR International Workshop on Graphics Recognition (2003)

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See detailQuelques réflexions à propos des possibilités d'analyses dendrochronologiques de châteaux de pierre du sud-est de la Belgique
Hoffsummer, Patrick ULg

in Poisson, Jean-Michel; Schwein, Jean-Jacques (Eds.) Le bois dans le château en pierre au Moyen Âge (2003)

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See detailBiogeography and Ecology of a dimorphic trait in Triturus alpestris (Amphibia, Caudata)
Denoël, Mathieu ULg; Duguet, Rémi; Dzukic, Georg et al

Poster (2003)

Paedomorphosis is an evolutionary process in which larval structures are retained in adult animals. In newts and salamanders, this heterochronic process is widely represented and concerns the retention of ... [more ▼]

Paedomorphosis is an evolutionary process in which larval structures are retained in adult animals. In newts and salamanders, this heterochronic process is widely represented and concerns the retention of gill slits. Our aim was to find out whether habitat and geographical determinants may be associated with paedomorphosis in a European species of newt. To this end, we determined the main characteristics of the aquatic sites containing paedomorphic Alpine newts that have been described in the literature or discovered by one of us. Although metamorphs are widely distributed in Europe, paedomorphs were only found at the southern margin of the geographic range of the species: mainly in the Italian and Balkan peninsulas. They were recorded in 87 aquatic sites. No single trend was outlined for the analyzed ecological parameters of the aquatic and surrounding terrestrial habitats (e.g. altitude, maximum water depth, drying and presence of forest). These results show that paedomorphs can be found in both favorable aquatic habitats surrounded by hostile terrestrial landscapes, but also in temporary waters located in proximity to appropriate terrestrial environments. Models predicting paedomorphosis in varied environments are thus supported, but require complementary investigations on the costs and benefits of each alternative ontogenetic pathway. On the other hand, the southern limitation of the heterochronic phenomenon and the existence of favorable sites in northern and eastern Europe suggest a genetic basis for paedomorphosis in the studied species. [less ▲]

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See detailModeling Stationary and Evolving Discontinuities with Finite Elements
Moës, Nicolas; Béchet, Eric ULg

in Owen, D. R. J.; Onate, E. (Eds.) VII International Conference on Computational Plasticity COMPLAS 2003 (2003)

A methodology for treating non-planar three-dimensional cracks with geometries that are independent of the mesh is summarized. The method is based on the extended finite element method, in which the crack ... [more ▼]

A methodology for treating non-planar three-dimensional cracks with geometries that are independent of the mesh is summarized. The method is based on the extended finite element method, in which the crack discontinuity is introduced as a Heaviside step function via a partition of unity. In addition, branch functions are introduced for all elements containing the crack front. The crack geometry is described by two signed distance functions (level sets), which in turn can be defined by nodal values. Consequently, no explicit representation of the crack is needed. A Hamilton-Jacobi equation is used to update the level sets as the crack grows. Numerical experiments show the robustness of the method in treating cracks with significant changes in topology. The method is readily extendable to inelastic fracture problems. [less ▲]

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See detailAdhesion of Self-Compacting Concrete on Old Concrete Structures
Courard, Luc ULg; Darimont, Anne ULg; Degeimbre, Robert ULg et al

in Seidler, Peter (Ed.) Industrial Floors 03 (2003)

The repair of concrete deck slabs or balcony needs a special composition of concrete, and self-Compacting Concrete (SCC) is advantageously used for such repair operation. The rheology of the material is ... [more ▼]

The repair of concrete deck slabs or balcony needs a special composition of concrete, and self-Compacting Concrete (SCC) is advantageously used for such repair operation. The rheology of the material is of prime importance and needs to be adapted to ensure the penetration of SCC beneath the concrete plate structure as well as the adhesion to the old concrete substrate. Several materials have been used and characterised by means of a physical, chemical and mechanical test program. A test procedure is proposed to assess the efficiency and quality of the repair technique and material. Analysis of the interface between concrete substrate and SCC is given on the basis of a pull-off test and microscopical observations. [less ▲]

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

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

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

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

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See detailMultimarker approach to risk stratification
Chapelle, Jean-Paul ULg

in Clinical Chemistry & Laboratory Medicine (2003), 41

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See detailEnquête sur les habitudes et les attitudes de lecture des jeunes de 14-15 ans en Communauté française de Belgique
Lafontaine, Dominique ULg

in Actes du 4e congrès international de la recherche en éducation et formation, AECSE, Lille, 2001 (2003)

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See detailPathologic fracture following humeral bone tumor in a mare
Bolen, Géraldine ULg; Péters, F.; Heimann, M. et al

Poster (2003)

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See detailValue of 18FDG gamma camera coincidence imaging in the follow-up of head and neck squamous cell carcinoma.
PAQUET, N.; LEFEBVRE, B.; HUSTINX, Roland ULg et al

in European Journal of Nuclear Medicine and Molecular Imaging (2003), 30(SUPPL 2), 278

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See detailApparition et maintien de la turbulence chez les enfants de 3 à 10 ans. Quelles solutions?
Born, Michel ULg; Boët, Sylvie

in Drenkhahn, Kirstin (Ed.) Violence juvénile : nouvelles formes et stratégies locales - expéciences à l'est et à l'ouest (2003)

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See detailStable isotopes and fatty acids used as biomarkers to distinguish among Antarctic amphipods trophic guilds
Nyssen, Fabienne ULg; Graeve, Martin

Conference (2003)

Peracarid crustaceans and amphipods in particular are an important group in the Southern Ocean and one of the most diverse in the macrozoobenthos (Jazdzewski et al., 1991). As a part of a ... [more ▼]

Peracarid crustaceans and amphipods in particular are an important group in the Southern Ocean and one of the most diverse in the macrozoobenthos (Jazdzewski et al., 1991). As a part of a multidisciplinary study of the amphipods ecological roles in Antarctic benthic systems (De Broyer et al., 2001, Nyssen et al., 2002), about 150 specimens belonging to 25 species of 10 of the most common amphipod families occurring in the Southern Ocean have been involved in this study of amphipod trophic patterns. Beside “classical” stomach content analysis or field observations, the use of naturally occurring stable isotopes of carbon (δ13C) and nitrogen (δ15N) has recently provided new insights into food web ecology (Hobson & Welch, 1992, Lepoint et al., 2000). This method is based on the direct relationship established between the isotopic signature of an organism and that of its preys (DeNiro & Epstein, 1978, 1981, Peterson & Fry, 1987). Nitrogen-15 typically shows a step-wise increase with trophic level within a food chain (Cabana & Rasmussen, 1994). Closer to the value of the diet, carbon-13 is preferentially used to assess the relative proportion of potential primary sources in a trophic web (ex.: pelagic vs benthic contribution to food intake) (Dauby et al., 1998, Hobson et al., 1995). Furthermore, for several species, the lipid signature – which has already been used successfully to help understand marine trophodynamics (Graeve et al., 2001, Nelson et al., 2001, Phleger et al. 1998) – and more particularly the fatty acid composition has been investigated as trophic biomarkers to reveal more precisely to which trophic guild they belong to. [less ▲]

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See detailLe traitement et la gestion du cheval hépatique
Amory, Hélène ULg

in Proceedings of the Annual meeting of the French Equine Veterinary Association (AVEF) (2003)

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See detailOrion : de la météorologie à la mythologie
Renaud, Jean-Michel ULg

in Cusset, Christophe (Ed.) La météorologie dans l'Antiquité : entre science et croyance. Actes du Colloque International Interdisciplinaire de Toulouse. 2-3-4 mai 2002 (2003)

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See detailModulation of steroid activity by transcription coactivators in songbirds
Charlier, Thierry ULg; Auger, Catherine J; Balthazart, Jacques ULg et al

in Hormones & Behavior (2003), 44

Songbirds have developed a specialized, steroid-dependent telencephalic vocal control system for the production of learned vocalization. Recent progress in the study of the mechanisms by which steroid ... [more ▼]

Songbirds have developed a specialized, steroid-dependent telencephalic vocal control system for the production of learned vocalization. Recent progress in the study of the mechanisms by which steroid receptors act on the eukaryotic genome has highlighted the role of a newly discovered protein family, the Nuclear Receptor Coactivators. More specifically, the CREB-binding protein (CBP) and the Steroid Receptor Coactivator-1 (SRC-1) have been shown to be actively involved in mediating steroid hormone action in the developing rat brain. The distribution of the coactivator SRC-1 was analyzed in canaries by in situ hybridization. A very broad but heterogeneous distribution of the transcript was observed, mainly in steroid-sensitive areas of the hypothalamus, the song control system and several catecholaminergic areas. The presence of SRC-1 in these regions was also confirmed by immunocytochemistry. A similar very high concentration of the coactivator CBP protein was also found in steroid-sensitive areas of the hypothalamus and in the song system. Sex differences in SRC-1 mRNA concentration were detected in HVC and in area X. Moreover, preliminary data obtained independently in starlings (CBP) and in quail (SRC-1) suggest that the expression of coactivators is regulated by steroids as well as by photoperiod. The presence of these steroid receptor coactivators in the telencephalic song control nuclei and in catecholaminergic cell groups that innervate the song system and their possible regulation by photoperiod and/or steroids support the idea that SRC-1 and CBP could play an important role in the control of singing behavior by modulating estrogen and androgen receptor action. [less ▲]

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See detailInfluence of Hyperbilirubinemia on Spectrophotometric Measurement of 30 Biochemical Tests, using the Roche® Modular P-module
Goffinet, Julie ULg; Bodson, Quentin; Chapelle, Jean-Paul ULg et al

in Clinical Chemistry & Laboratory Medicine (2003), 41

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See detailInfluence du contenu et des modalités d'évaluation sur les indicateurs d'équités
Lafontaine, Dominique ULg; Demeuse, Marc

in Les actes du Colloque de l'Adméé sur le thème "Evaluation entre efficacité et équité" (2003)

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See detailQualitative survey of five beech damaging coleoptera (Scolytidae and Lymexylonidae) in Wallonia (Southern Belgium)
Henin, Jean-Marc; Huart, Olivier; Lejeune, Philippe ULg et al

in McManus, M. L.; Liebhold, A. M. (Eds.) Proceedings Ecology, Survey and Management of Forest Insects (2003)

In 2000 and 2001, Trypodendron domesticum L. and T. signatum (F.) (Col.: Scolytidae) were one of the main causes of the depreciation of more than 1,600,000 m³ of standing beech trees, Fagus sylvatica L ... [more ▼]

In 2000 and 2001, Trypodendron domesticum L. and T. signatum (F.) (Col.: Scolytidae) were one of the main causes of the depreciation of more than 1,600,000 m³ of standing beech trees, Fagus sylvatica L., in Wallonia (Southern Belgium). In 2001, a survey aiming at assessing the range of those indigenous ambrosia beetles, so far discreet and poorly studied, pointed out that they are omnipresent all over Wallonia. Two other scolytids and one lymexylonid (Col., Lymexylonidae) were also frequently caught, which made it possible to outline their regional distribution too. [less ▲]

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See detailUtilisation pédagogique d'Internet dans l'enseignement secondaire : pourquoi et comment utiliser Internet à des fins pédagogiques ? Comment évaluer l'acquisition de compétences chez les élèves ?
Hubert, Sylviane; Massart, Valérie ULg

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

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See detailClinical, histopathological and immunological aspects of neosporosis in experimentally infected dogs
Lasri, Saadia ULg; Rettigner, C.; Onclin, K. et al

Conference (2003)

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See detailPurificazione delle proteine associate alla gestazione (PAG) nella bufala (Bubalus bubalis): risultati preliminari.
Barbato, O.; Melo de Sousa, Noelita ULg; Malfatti, A. et al

in Atti 2o Congresso Nazionale sull’Allevamento del Bufalo (2003)

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See detailThe State of the Art in Multiple Object Tracking Under Occlusion in Video Sequences
Gabriel, Pierre; Verly, Jacques ULg; Piater, Justus ULg et al

in Advanced Concepts for Intelligent Vision Systems (2003)

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See detailSérapis et l'aigle : polysémie d'un iconotype
Veymiers, Richard ULg

in Cannuyer, Christian (Ed.) Les lieux de culte en Orient. Jacques Thiry in honorem (2003)

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See detailA Framework For Humanoid Control and Intelligence
Platt, Robert; Brock, Oliver; Fagg, Andrew et al

in Proceedings of the IEEE International Conference on Humanoid Robots (2003)

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See detailOn the combination of corpus-based and experimental methodologies in the study of causal, contrastive and metadiscourse connectives in L1 and L2 text comprehension and production
Perrez, Julien ULg; Degand, Liesbeth

in Archer, Dawn; Rayson, Paul; Wilson, Andrew (Eds.) et al Proceedings of the Corpus Linguistics 2003 Conference (2003)

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See detailHygro-thermal application conditions and adhesion
Courard, Luc ULg; Darimont, Anne ULg; Degeimbre, Robert ULg et al

in Seidler, Peter (Ed.) Industrial Floors 03 (2003)

Coatings are designed to protect concrete against environmental aggression. Water is one of the aggressive parameters able to deteriorate the concrete structure. The objectives of this paper are to ... [more ▼]

Coatings are designed to protect concrete against environmental aggression. Water is one of the aggressive parameters able to deteriorate the concrete structure. The objectives of this paper are to present the effects of water (i) during application of coating on the concrete substrate and (ii) pull-off test. Semi-permanent moisty state produced by absorption from the uncoated face, total immersion or diffusion of water from the back face of the substrate are analysed. Water vapour diffusion and influence of hydrophobic treatment are also investigated. A classification based on increasing influence of the tests and application conditions on adhesion is proposed and clearly points out the negative effect of capillary action from the uncoated face. [less ▲]

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See detailThe Darwin-GENIE Experiment: An ESA-ESO Partnership
Gondoin, Ph; Absil, Olivier ULg; Erd, C. et al

in Sembach, K. R.; Blades, J. C.; Illingworth, G. D. (Eds.) et al Hubble's Science Legacy: Future Optical/Ultraviolet Astronomy from Space (2003)

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See detailSavoirs, compétences disciplinaires, compétences transversales : évolution ou révolution ?
Crahay, Marcel ULg

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

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See detailInfluence du contenu et des modalités d'évaluation sur les indicateurs d'équité
Lafontaine, Dominique ULg; Monseur, Christian ULg

in Actes du 16e colloque international de l'Admée-Europe, Liège, 4-6 septembre 2003 (2003)

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See detailClimatic Modelling of Black Grouse population dynamics: a game or a tool?
Loneux, Michèle ULg; Lindsey, James ULg

in Sylvia (2003), 39(supplement), 43-52

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See detailAppui au développement rural multisectoriel au Laos
Lebailly, Philippe ULg

in Premières rencontres internationales de la CUD "Construire ensemble le Savoir Universitaire pour le Développement" (2003)

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See detail16K hPRL prevents angiogenesis by inducing both apoptosis and cell cycle arrest of endothelial cells
Tabruyn, Sébastien ULg; Sorlet, Catherine; Georges, Angélique et al

Poster (2003)

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See detailDysregulation of inflammation
Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Hoffman, A.; Robinson, N. E.; Wade, J. F. (Eds.) Proceedings of a Workshop on “Inflammatory Airway Disease: Defining the Syndrome”, Havemeyer Foundation Monograph Series No. 9 (2003)

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See detailNumerical modelling and seasonal investigations of the Northwest African Upwelling
Elmoussaoui, Abdellali; Djenidi, Salim ULg; Beckers, Jean-Marie ULg

Conference (2003)

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See detailStudy and comparison of multibeam photorefractive recordings and photorefractive crystals stack to holographic interferometry
Thizy, Cédric ULg; Georges, Marc ULg; Scauflaire, V. et al

in Delaye, Ph; Denz, C.; Mager, L. (Eds.) Photorefractive Effects, Materials, and Devices (2003)

Two techniques with the common objective to integrate multiple view holographic interferometry in one optical head are presented: multi recordings in a photorefractive BSO crystal and the use of a series ... [more ▼]

Two techniques with the common objective to integrate multiple view holographic interferometry in one optical head are presented: multi recordings in a photorefractive BSO crystal and the use of a series of BSO crystals as the recording medium. After a description of the principles we will show their application to holographic interferometry. The results will be presented and a comparison of the two methods, based on the quality of the interferograms, will be performed, showing the respective advantages and limitations of each technique compared to the other and to classical experiment of holographic interferometry. Up to four holograms have been recorded in one crystal, or two holograms in two crystals, corresponding to the four positions of illumination of the object [less ▲]

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See detailThe SKT-construction : sort of, kind of and type of
Brems, Lieselotte ULg

Conference (2003)

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See detailThe use of the Tosoh AIA-600II and AIA-1800 immunoassay analysers for the determination of CTNI
Chapelle, Jean-Paul ULg; Aldenhoff, Marie-Claire ULg; Gielen, Jacques

in Clinical Chemistry & Laboratory Medicine (2003), 41

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See detailMagnetic properties of iron nitride-alumina nanocomposite materials prepared by high-energy ball milling
Mishra, S. R.; Long, G. J.; Grandjean, Fernande ULg et al

in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2003), 24(1-3), 93-96

The structural and magnetic properties of the granular iron nitride-alumina composite materials: (FexN)(0.2)(Al2O3)(0.8) and (FexN)(0.6)(Al2O3)(0.4), fabricated using high-energy ball milling have been ... [more ▼]

The structural and magnetic properties of the granular iron nitride-alumina composite materials: (FexN)(0.2)(Al2O3)(0.8) and (FexN)(0.6)(Al2O3)(0.4), fabricated using high-energy ball milling have been determined by using X-ray diffraction, Mossbauer spectroscopy, and magnetization measurements. The Mossbauer spectra, fit with a distribution of hyperfine fields between zero and 40 T. indicate that the weighted average field decreases with increasing milling time. The isomer shift increases with milling time because of a reduced iron 4s-electron density at the grain boundaries. Coercive fields as high as 325 and 110 Oe are obtained for (FexN)(0.2)(Al2O3)(0.8) at 5 and 300 K, respectively; the increase in the coercive field upon cooling indicates the presence of superparamagnetic particles. The coercive field increases with milling time because of the reduced particle size. The decrease in the magnetization results from the increase in both the superparamagnetic fraction and the concentration of surface defects with increased milling time. [less ▲]

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See detailCoupling EIA and SEA of large urban infrastructures: the Liege-Guillemins case study
Cremasco, Veronica; Ruelle, Christine ULg; Teller, Jacques ULg

in Proc. of COST C8 final conference, Sustainable Urban Infrastructure, approaches – solutions – networking (2003)

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