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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 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 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 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 detailConservation biology of the French and Iberic threatened European mink, Mustela lutreola
Michaux, J; Libois, Roland ULg; Davison, Angus et al

Poster (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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 detailImproving spatial information extraction for local and regional authorities using Very-High-Resolution data - geometric aspects.
Devriendt, Dennis; Goossens, Rudi; De Wulf, Alain et al

in International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences (2003), 34(XXX),

The purpose of the presented research project is to investigate how present-day EO-technology can support local and regional decision-making, particularly in Belgium, and to develop prototype versions of ... [more ▼]

The purpose of the presented research project is to investigate how present-day EO-technology can support local and regional decision-making, particularly in Belgium, and to develop prototype versions of value-added products that fulfil some of the actual information needs, as expressed by Belgian authorities at the local and at the regional level. To accomplish this goal the proposal addresses both technical and user-oriented issues, and builds on the experience of five research teams, each with its own background and particular know-how. The most important objectives of the project are: - to define optimal methods for improved spatial information extraction from high- and very-high resolution data, based on innovative processing techniques; - to identify useful EO-applications at the level of local and regional decision making that are made possible by applying the information extraction methods that will be developed; in this case especially 3D information - to define and develop value-added core data products that will support these applications, and that can be consulted with easy-to-use, widely available IT-tools (CD-ROM, Internet, …). One of the technical research modules is focussing on the geometrical aspects of VHR data processing. In terms of spatial resolution, VHR data have the required level of detail to resolve individual objects in the landscape, in a similar way as airborne data. As such, they have the potential of becoming a useful data source for the extraction of detailed, object-related information, and for the production of large-scale cartographic reference data. The geometry of VHR sensor data, however, completely differs from the geometry of aerial photographs (Bethel et al., 2001). Research is going on to evaluate the geometric qualities of present and future VHR standard data products, from the moment they become available, and to examine what level of geometric accuracy is attained with these data, depending on image parameters, processing strategies, and terrain characteristics (Zhou and Li, 2000). The main objectives of the research module on geometric aspects of VHR data processing are: a) to define an optimal procedure for the derivation of envelope DSMs (Digital Surface Models) and ortho-photoplans from VHR data; b) to develop a theoretical model to study the effect of the oblique viewing angle of VHR data on image displacements caused by building height and relief; c) to evaluate the geometric accuracy of satellite-derived envelope DSMs and ortho-corrected image data in comparison with similar products obtained by means of large-scale aerial photography. The module about geometrical aspects is divided into six specific tasks. a) GPS database creation b) Creation of reference envelope DSMs based on aerial photography c) Ortho-rectification of VHR images and aerial photography based on reference DSMs d) Evaluation of the quality of VHR geo-referenced data e) Modelling of displacements caused by terrain morphology and sensor viewing angle f) Development of envelope DEMs from VHR stereoscopic imagery The project is now in the stage where the quality of the georeferenced and orthorectified data is evaluated. [less ▲]

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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 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 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 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 detailDes différences liées au sexe : pas si simple
Blondin, Christiane ULg; Lafontaine, Dominique ULg

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2003), 15-16

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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 detailDu texte de circonstance au recueil de Situations. L’économie de l’écriture engagée chez Jean-Paul Sartre
Denis, Benoît ULg

in Langlet, Irène (Ed.) Le Recueil littéraire. Pratiques et théorie d’une forme (2003)

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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 detailAEROMONAS SPP AS PATHOGENS FOR MARINE MAMMALS IN SYSTEMIC AND SKIN DISEASES
Boseret, Géraldine ULg

in INTERNATIONAL SYMPOSIUM ON DISEASES OF ZOO AND WILDLIFE PROCEEDINGS SF 997.5 I57 (2003)

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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 detailLes propositions émises dans le passé en vue de modifier l'article 195 de la Constitution belge
Behrendt, Christian ULg

in Delpérée, Francis (Ed.) La procédure de révision de la Constitution (2003)

The articles provides for an overview of the several proposals which were made in the past in to alter the current procedure for amending the Belgian Constitution (procedure which is laid down in article ... [more ▼]

The articles provides for an overview of the several proposals which were made in the past in to alter the current procedure for amending the Belgian Constitution (procedure which is laid down in article 195 Belg. Const.). [less ▲]

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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 detailSimulation of tissue ingrowth and differentiation around a loaded titanium implant in a bone chamber,
Geris, Liesbet ULg; Van Oosterwyck; Vander Sloten, Jos et al

in Veraart, C.; Verdonck, P. (Eds.) Proceedings of the third national day on biomedical engineering (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 detailGeneral Framework for Describing and Evaluating Suboptimum Techniques for STAP
De grève, Sébastien; Lapierre, Fabian D.; Verly, Jacques ULg

Conference (2003)

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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 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 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 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 detailHyperthermie chez le cheval: Approche diagnostique clinique
Amory, Hélène ULg

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

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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 detailClimatic influence on black grouse population dynamic in Belgian Hautes-Fagnes : an update.
Loneux, Michèle ULg; Lindsey; Vandiepenbeek et al

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

in Caractères (2003), 10(1), 11-12

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

Poster (2003)

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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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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 detailInclusions and Carbides characterisation in High-Speed Steels
Tchuindjang, Jérôme Tchoufack ULg; Lecomte-Beckers, Jacqueline ULg

in Proceedings de la journée de la société belge de microscopie (SBM-BVM), RUCA, UA (2003)

Prior to assessment of inclusions and carbides is the identification of thes particles. The present survey shows how we determine the nature of inclusions and carbides, while using Scanning Electron ... [more ▼]

Prior to assessment of inclusions and carbides is the identification of thes particles. The present survey shows how we determine the nature of inclusions and carbides, while using Scanning Electron Microscopy and Energy Dispersive Spectroscopy with X-Rays. [less ▲]

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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 detailLes interactions médicamenteuses
Charlier, Corinne ULg

Conference (2003)

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See detailEspace construit
Frankignoulle, Pierre ULg

in Lask, Tomke (Ed.) Constructions sociales de l'espace. Les territoires de l'anthropologie de la communication. (2003)

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See detailFeeding habits in a dimorphic metapopulation of the tiger salamander Ambystoma tigrinum nebulosum
Denoël, Mathieu ULg; Wissinger, Scott; Whiteman, Howard

Conference (2003)

Facultative paedomorphosis in salamanders refers to the presence of two ontogenetic pathways in natural populations – paedomorphosis, in which individuals retain gills at the adult stage, and ... [more ▼]

Facultative paedomorphosis in salamanders refers to the presence of two ontogenetic pathways in natural populations – paedomorphosis, in which individuals retain gills at the adult stage, and metamorphosis, in which larvae metamorphose. The Mexican Cut Nature Preserve (Colorado, USA) is composed of numerous ponds which are inhabited by paedomorphic and metamorphic tiger salamanders. While paedomorphs usually stay in the same aquatic habitat all their life, metamorphs may leave water and colonize other ponds. The aim of this study was to determine the feeding habits of the two morphs from this metapopulation. To this end, adults were caught by dip-netting, stomach-flushed, measured and marked. Paedomorphs were only found in permanent waters. Metamorphs were present in all habitats, but particularly in the temporary ponds. Diet differed between ponds – reflecting their invertebrate composition – with a preponderance of either microcrustaceans, fairy shrimp or insect larvae. In ponds inhabited by the two morphs, paedomorphs consumed more prey items. Because dry mass and energy content varied between invertebrates, feeding on some of them, such as fairy shrimp in the temporary ponds where they are abundant, gave high energy intake to the predators. Because such resources are only available to the dispersive morph, metamorphs are at the advantage in being able to avoid competition with paedomorphs in permanent ponds and in using transient resources from the productive temporary waters. [less ▲]

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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 detailSpeed of sound measurements in the evaluation of bone properties in Holstein-Friesian cows: a preliminary study
Sandersen, Charlotte ULg; Guyot, Hugues ULg; Vandeputte, Sébastien ULg et al

in Acta Veterinaria Scandinavica. Supplementum (2003), (Suppl 97), 149

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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 detailGéographie et science de l’information géographique
Donnay, Jean-Paul ULg

in Quelle géographie enseigner demain à l’Université ? (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 detailUsing artificial neural networks to estimate rotor angles and speeds from phasor measurements
Del Angel, Alberto; Glavic, Mevludin; Wehenkel, Louis ULg

(2003)

This paper deals with an improved use of phasor measurements. In particular, the paper focuses on the development of a technique for estimation of generator rotor angle and speed, based on phasor ... [more ▼]

This paper deals with an improved use of phasor measurements. In particular, the paper focuses on the development of a technique for estimation of generator rotor angle and speed, based on phasor measurement units, for transient stability assessment and control in real-time. Two multilayered feed-forward artificial neural networks are used for this purpose. One for the estimation of rotor angle and another for the estimation of rotor speed. The validation has been made by simulation in a power system because techniques for the direct measurement were not available. Results obtained with the help of a simple one machine to infinite bus system are presented and compared against those obtained using analytical formulas derived from the generator classical model. [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 detailUse of atropine to inhibit vagally mediated baroreceptor reflex in horses undergoing dobutamine stress test
Sandersen, Charlotte ULg; Detilleux, Johann ULg; Delguste, Catherine ULg et al

in Pflügers Archiv : European Journal of Physiology (2003), 446(5), 4

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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 detailSaintes femmes en terre liégeoise. Lecture de biographies spirituelles inédites des 17e et 18e s.
Henneau, Marie-Elisabeth ULg

in Van Lieburg, Fred; Wingens, Marc; Beyer, Jürgen (Eds.) et al Confessional Sanctity (c. 1500- c. 1800) (2003)

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See detailIsolement de suppresseurs hétérologues extragéniques multi-copies de la double mutation de levure msb3-msb4-
Delroisse, Jean-Marc; Breban, Martine; Burny, Arsène et al

Poster (2003)

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See detailSpatial processes in landscape transformation: definition, classification and detection.
Bogaert, Jan ULg; Ceulemans, R; Van Eysenrode Salvador, D

in Abstracts of the IALE World Congress 2003. (2003)

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See detailEvaluation de la présence des Syrphidae en cultures maraîchères et relation avec les populations aphidiennes.
Francis, Frédéric ULg; Colignon, Pierre; Gaspar, Charles et al

in Abstract book (2003)

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See detailValidation of two homologous radioimmunoassays for measuring pregnancy-associated glycoprotein in ewes.
El Amiri, B.; Karen, A.; Sulon, J. et al

in Reproduction in Domestic Animals (2003), 38(4), 358

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See detailSynthèse des débats
Marcoen, Jean Marie ULg; Istasse, Ch.

in Actes du Colloque : Le droit international dans le domaine de l'environnement. (2003)

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See detailEffet de la pression partielle en oxygène sur le métabolisme des chondrocytes bovins en culture
Burton, S; Mathy-Hartet, M; Dupont, G et al

in Revue du Rhumatisme (2003), 70

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See detailEvaluation of classical NSAIDS on COX-1 and COX-2 purifies enzymes and prognosis of their effects on physiological responses.
De Leval, X.; Henrotin, Yves ULg; Masereel, B. et al

in Fundamental & Clinical Pharmacology (2003), 14

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See detailAgregation study of the pyropheophorbide- a metyl ester in ethanol aqueous solution and liposomes
Delanaye, L.; Heyne, B.; Hoebeke, Maryse ULg

Conference (2003)

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See detailIntra-patient variability of SUV in normal tissues.
PAQUET, N.; HUSTINX, Roland ULg; FOIDART-WILLEMS, Jacqueline ULg

in European Journal of Nuclear Medicine and Molecular Imaging (2003), 30(SUPPL 2), 327

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See detailAcquis des élèves à 15 ans et parcours de formation
Lafontaine, Dominique ULg; Demeuse, Marc

in Capital humain et marchés du travail : perspectives régionales et européennes Enseignement et formation - marché du travail : quelles articulations ? (2003)

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