References of "Scientific congresses and symposiums"
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See detailIndividualized versus standardized exercise training for claudicant patients.
Magne, Julien ULg; Boccalon, H; Bouley, M et al

Conference (2003)

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See detailL'interscripteur et le rhapsode
Servais, Christine ULg

in Parouty-David, Françoise; Zilberberg, Claude (Eds.) Sémiotique et esthétique (2003)

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See detailA probabilistic approach to power system network planning under uncertainties
Vassena, Stefano; Mack, Philippe; Druet, Christophe et al

in Proceedings of the IEEE Bologna Power Tech Conference (2003)

This work proposes a methodology and a practical tool for the study of long-term network planning under uncertainties. In this approach the major external uncertainties during the planning horizon are ... [more ▼]

This work proposes a methodology and a practical tool for the study of long-term network planning under uncertainties. In this approach the major external uncertainties during the planning horizon are modeled as macroscenarios at different future time instants. On the other hand, the random nature of actual operating conditions is taken into account by using a probabilistic model of microscenarios based on past statistics. Massive Monte-Carlo simulations are used to generate and simulate a large number of scenarios and store the detailed results in a relational database. Data mining techniques are then applied to extract information from the database so as to rank scenarios and network reinforcements according to different criteria. [less ▲]

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See detailUpdating the Jungfraujoch FTIR databases : current status
Duchatelet, Pierre ULg; Mahieu, Emmanuel ULg; Zander, Rodolphe ULg et al

(2003)

Since the middle of the 20th century, the University of Liège has been active at the International Scientific Station of the Jungfraujoch (ISSJ) in the Swiss Alps (46.5°N, 8.0°E, 3580m asl) to study the ... [more ▼]

Since the middle of the 20th century, the University of Liège has been active at the International Scientific Station of the Jungfraujoch (ISSJ) in the Swiss Alps (46.5°N, 8.0°E, 3580m asl) to study the chemical composition of both the solar photosphere and the Earth’s atmosphere. Since 1989, the ISSJ is an accepted site of the northern midlattitude primary Alpine station of the NDSC (Network for the Detection of Stratospheric Change). This acceptance resulted from earlier monitoring activities by Ulg of a large number of atmospheric constituents. Within the NDSC frame, a special attention and many efforts have been devoted to the monitoring of the most important atmospheric constituents involved both in the erosion of stratospheric ozone and in the greenhouse capacity of the troposphere, after it became clear that human activities have a direct impact on these two processes. Using two high resolution Fourier transform infrared (FTIR) spectrometers, over 25000 wide-band solar spectra encompassing nearly 1700 days since the mid 1980s have been recorded and analyzed to study, quasi simultaneously and repeatedly, local, seasonal and secular variations of some 20 gaseous telluric species. So far, most results have been reported, demonstrating the power of infrared spectrometric solar observations to characterize the chemical composition of the atmosphere. These datas, archived in terms of total vertical column abundances (e.g., at the NDSC-Data Host Facility; http://www.ndsc.ws), are expressed in number molecules per cm2 above the site using best-know input parameters (i.e. spectroscopic-, instrumental-, environmental-) in the retrieval procedure. Meanwhile, more sophisticated algorithms, based on the “Rodgers” optimal estimation method, have been developed, allowing to derive partial tropospheric- and stratospheric columns for various species, including HCl, ClONO2, O3, HF, CO, N2O, CH4, HCN, OCS. This contribution reports related results for HCl and ClONO2. [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 detailBauforschung et dendrochronologie
Hoffsummer, Patrick ULg

in De Jonge, Krista; Van Baelen, Koen (Eds.) Preparatory Architectural Investigation in the Restauration of Historical Buildings (2003)

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

in Proceedings of the symposium on integrated systems in dental healthcare (2003)

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See detailLes insaponifiables d'avocats/soja s'opposent aux effets délétères d'H2O2 sur le métabolisme du cartilage
Mathy-Hartet, Marianne; Devel, P; Piccardi, N et al

in Revue du Rhumatisme (2003), 70

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See detailOxidant activity of rabbit synoviocytes (HIG-82) demonstrated by oxymetry and ethylene production.
Schneider, Nicole ULg; Lejeune, Jean-Philippe ULg; Mouithys-Mickalad, Ange ULg et al

Poster (2003)

We are interested in a possible role of synoviocytes in the ROS production implicated in osteoarthritis, therefore we studied the response of a rabbit synoviocyte cell line (HIG-82) to variable oxygen ... [more ▼]

We are interested in a possible role of synoviocytes in the ROS production implicated in osteoarthritis, therefore we studied the response of a rabbit synoviocyte cell line (HIG-82) to variable oxygen tensions and the oxidant activity of these cells in response to stimuli. Synoviocytes were cultured at 5 and 21 % O2, their O2 consumption (cellular respiration, monitored with Clark electrode) was measured at 21% O2 and after anoxia, before and after stimulation with phorbol myristate acetate (PMA), and their oxidant response to PMA stimulation was quantified by measuring ethylene (gas chromatography) released when the substrate, alpha-keto-gamma-methylbutyric acid, is oxidised by the ROS produced by the cells. Cell growth was faster at 21 % O2 than at 5% O2, and microscopic observation revealed 2 cell populations: a few small round cells in suspension and many adherent cells. By oxymetry, we observed that a 106 synoviocytes suspension in 2 ml completely consumed O2 within 15 min, that anoxia (7 min) slightly slowed the respiration rate down and that PMA stimulation increased O2 consumption (150 % increase). The oxidant activity (ethylene production) of the cells was stimulated by PMA in a dose-dependent manner (10-9 to 10-7M) but the cell response was highly variable (from 150 to 1500 % increase) and was largely reduced by diphenyliodonium, an inhibitor of NADPH-oxidase and NO-synthase. The capacity to produce free radical species was confirmed for the small round cells by detection of an electron paramagnetic resonance (EPR) signal after stimulation. These results thus demonstrate a sensibility to O2 and an oxidant activity of synoviocytes at least related to ROS production by NADPH-oxidase activity. [less ▲]

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See detailAnalysis of PCDD/Fs in human blood plasma using CALUX bioassay and GC-HRMS: a comparison
Van Wouwe, Nathalie; Eppe, Gauthier ULg; Xhrouet, Céline ULg et al

in Organohalogen Compounds (2003)

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See detailA new Mars ionosphere/airglow Model between 60 and 500 km altitude
Witasse, Oliver; Blelly, P.; Lilensten, Jean et al

in Proceedings of the Workshop “Mars Atmosphere Modelling and Observations” (2003)

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See detailPresent day and geologic deformation rates in the Ardenne and the lower Rhine embayment (North-western Europe)
Van Camp, Michel; Camelbeeck, Thierry; Vanneste, K. et al

Conference (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 detailL'iconographie du meurtre de saint Lambert de Liège
George, Philippe ULg

in Bischofsmord im Mittelalter. Murder of Bishops, 22 septembre 2000 (2003)

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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 detailA longitudinal study of isokinetic characteristics of young athletes and prevention of muscular and joint injury: Preliminary results - Abstract
Amato, M.; Afriat, P.; Portero, P. et al

in Isokinetics & Exercise Science (2003), 11(1), 53-54

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See detailPerfluorooctane sulfonic acids (PFOs) in marine mammals stranded along the North Sea coast.
Van de Vijver, K. I.; Das, Krishna ULg; Van Dongen, W. et al

Poster (2003)

Over the last decades little work has been conducted on the environmental behaviour and effects of perfluorinated organochemicals (FOCs). These chemicals are commonly used as solvents, surfactants ... [more ▼]

Over the last decades little work has been conducted on the environmental behaviour and effects of perfluorinated organochemicals (FOCs). These chemicals are commonly used as solvents, surfactants, cosmetics and are applied in fire foam extinguishers. Recent findings have shown that FOCs (with perfluorooctane sulfonic acid - PFOS - as the most important representative) are detected in organisms living in industrialized as well as in remote areas. The fact that PFOS is hardly biodegradable, clearly accumulates in the liver and blood of top predators and the fact that little information is available on the toxic properties of PFOS, makes this chemical an environmental pollutant of primary concern. In the present study we measured PFOS concentrations in seven marine mammals stranded on the Belgian, French and Dutch North Sea coast between 1994 and 2000. PFOS concentrations were measured in liver and kidney tissue using combined liquid chromatography-mass spectrometry (LC-MS/MS). Detectable PFOS concentrations (up to 820.60 ng/g) were found in harbour porpoises, white-beaked, white-sided and striped dolphins, sperm whales and harbour seals. In fin whale and hooded seal concentrations were below the detection limit of 10 ng/g. PFOS levels in female porpoise livers were significant higher than those in males. The present results show clearly the difference in accumulation pattern of PFOS compared to that of persistent organochlorine chemicals. In order to evaluate the interspecies differences, we developed PFOS-trophic level relationships based on stable nitrogen and carbon isotope ratios. Animals that display the highest trophic positions (highest d15N) have the highest PFOS levels. The different feeding ecology of these species (inshore versus offshore) also seems to contribute to differences in PFOS concentrations. Next to the presentation of PFOS concentrations in marine mammals of the North Sea, the possible toxicological effects of perfluorinated compounds are discussed. [less ▲]

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See detailIteratively extending time horizon reinforcement learning
Ernst, Damien ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in Machine Learning: ECML 2003, 14th European Conference on Machine Learning (2003)

Reinforcement learning aims to determine an (infinite time horizon) optimal control policy from interaction with a system. It can be solved by approximating the so-called Q-function from a sample of four ... [more ▼]

Reinforcement learning aims to determine an (infinite time horizon) optimal control policy from interaction with a system. It can be solved by approximating the so-called Q-function from a sample of four-tuples (x(t), u(t), r(t), x(t+1)) where x(t) denotes the system state at time t, ut the control action taken, rt the instantaneous reward obtained and x(t+1) the successor state of the system, and by determining the optimal control from the Q-function. Classical reinforcement learning algorithms use an ad hoc version of stochastic approximation which iterates over the Q-function approximations on a four-tuple by four-tuple basis. In this paper, we reformulate this problem as a sequence of batch mode supervised learning problems which in the limit converges to (an approximation of) the Q-function. Each step of this algorithm uses the full sample of four-tuples gathered from interaction with the system and extends by one step the horizon of the optimality criterion. An advantage of this approach is to allow the use of standard batch mode supervised learning algorithms, instead of the incremental versions used up to now. In addition to a theoretical justification the paper provides empirical tests in the context of the "Car on the Hill" control problem based on the use of ensembles of regression trees. The resulting algorithm is in principle able to handle efficiently large scale reinforcement learning problems. [less ▲]

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See detailDer Einsatz neuer Medien in der regelungstechnischen Ausbildung
Schumm, P.; Bullinger, Eric ULg; Schweickhardt, T. et al

Poster (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 detailSeismic performance of ductile steel moment resisting frames designed according to Eurocode 3 and Eurocode 8. First step for Eurocode 8 calibration.
Sanchez, L.; Plumier, André ULg

in Proceedings of the STESSA 2003 Conference (2003)

The paper discusses the components of reduction factor to be accounted for design purposes. A parametric study of moment resisting steel frames (MRSF) designed according Eurocode 3 (EC3) and Eurocode 8 ... [more ▼]

The paper discusses the components of reduction factor to be accounted for design purposes. A parametric study of moment resisting steel frames (MRSF) designed according Eurocode 3 (EC3) and Eurocode 8 (EC8) is performed. The structural supply of the designed structures exceeds largely the seismic demand in spite of the fact that Ultimate Limit State (ULS) verification of EC8 for MRSF is not conservative. The structural performance is poorly correlated with ULS verification of EC8 but with others code restrains and with parameters like base shear ratio or fundamental period. The practice that deduces the values of reduction factor on the observation of structural performance under past earthquake is not rationally based. This practice tends to make useless the ULS verification for structural systems like MRSF, in which structural performance is poorly correlated with the ULS verification. This practice is responsible of the unsafe values of reduction factors assigned in the seismic codes. [less ▲]

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See detailThymic IGF-2 and central self-tolerance of the insulin family: a basis for the development of a negative vaccine against type 1 diabetes
Geenen, Vincent ULg; Brilot, Fabienne; Hansenne, Isabelle et al

in Diabetologia (2003), 46 (Suppl. 2)

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See detailApport des volumes de Fresnel en tomographie sismique
Sage, Sandrine; Grandjean, Gilles; Verly, Jacques ULg

Conference (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 detailObservations sur la tradition manuscrite du théâtre religieux médiéval en langue d'oc
Henrard, Nadine ULg

in Castano, Rossana; Guida, Saverio; Latella, Fortunata (Eds.) Scène, évolution, sort de la langue et de la littérature d’oc : Actes du VIIe Congrès de l’Association internationale d’études occitanes (A.I.É.O.), Reggio Calabria et Messine 7-13 juillet 2002, 2 vol. (2003)

Typologie des mss qui conservent le répertoire dramatique occitan, établie en se fondant sur la spécificité d’un genre par nature lié à une performance. Dans le cas du théâtre, les données codicologiques ... [more ▼]

Typologie des mss qui conservent le répertoire dramatique occitan, établie en se fondant sur la spécificité d’un genre par nature lié à une performance. Dans le cas du théâtre, les données codicologiques (qualité des supports, ajouts marginaux, ratures, présence de notation musicale, de didascalies rubriquées…) sont à considérer en tenant compte de la fonction pratique des mss et du rapport des textes à la scène. L’enquête codicologique éclaire donc l’activité dramatique dans son ensemble (de l’écriture des textes à la conception du spectacle), et ses résultats s’insèrent dans une réflexion plus générale sur le statut littéraire du texte de théâtre occitan au Moyen Âge. Cet article s’inscrit dans l’esprit des recherches menées par G.A. Runnalls sur les mss du théâtre du Nord.] [less ▲]

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See detailPresent-day vertical crustal motion and active faulting in the Roer graben
Camelbeeck, Thierry; Warnant, René ULg; Vanneste, K. et al

Conference (2003)

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See detailA stepwise approach for chemical risks assessment at the workplace
Mairiaux, Philippe ULg; Balsat, Alain; Dujardin, Marc ULg et al

in Strasser, H.; Kluth, K.; Rausch, H. (Eds.) et al Quality of work and products in enterprises of the future (2003)

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See detailLes interactions entre l'homme et les animaux familiers : quelques champs d'investigation et réflexions méthodologiques
Servais, Véronique ULg; Millot, Jean-Louis

in Baudouin, Claude (Ed.) L'éthologie appliquée aujourd'hui. Tome 3, l'éthologie humaine (2003)

Le paper synthetizes the main studies in the field of human-animal interactions and points to some pitfalls in the methodologies of many researches.

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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 detailAdaptation du K-ABC ; vers une identification des dysharmonies développementales dans la trisomie 21
Frenkel, Stéphanie ULg; Bourdin, Béatrice; Vandromme, Luc

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 detailLevels of PCDDs, PCDFs and PCBs in International Fast Food Samples
Focant, Jean-François ULg; Pirard, Catherine; De Pauw, Edwin ULg

in Organohalogen Compounds (2003), 60-65

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See detailCandida albicans cheilitis in guinea pig may be caused by commensal strains carried in the lower genital tract
Mignon, Bernard ULg; Symoens, F.; Losson, Bertrand ULg

in Veterinary Dermatology (2003), 14(5), 242

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See detailThe monitoring of the ionospheric activity using GPS measurements
Warnant, René ULg; Stankov, Stanimir; Jodogne, Jean-Claude et al

in Proceedings of the COST271 2002 workshop (2003)

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See detailPhosphate mineral formation in Lake Baïkal sediments and implications for paleoclimate
Fagel, Nathalie ULg; Alleman, L. Y.; André, Luc et al

Poster (2003)

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See detailCeramides play a critical role in spontaneous neutrophil apoptosis
Seumois, G.; Fillet, Marianne ULg; Gillet, Laurent ULg et al

Poster (2003)

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See detailControl of ordered mesoporous molecular sieves synthesis using non-ionic surfactants by incorporation of transition metal ions in the micellar solution
Léonard, Alexandre ULg; Blin, Jean-Luc; Herrier, Gontran et al

in Studies in Surface Science and Catalysis (2003), 146

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See detailL'Observatoire de la consommation alimentaire
Claustriaux, Jean-Jacques ULg; Cordier, L.; Duquesne, Brigitte ULg et al

in Vers une politique de qualité, à quel prix ? (2003)

Description de l'utilisation d'une base de données relative aux achats de produits alimentaires effectués par des ménages.

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See detailElevated atmospheric CO2 influences ammonia oxidiser community structure and net nitrification
Carnol, Monique ULg; Malchair, Sandrine ULg

in International Symposium: Structure and Function of Soil Microbiota, Philipps-University Marburg, Germany, September 18-20, 2003 (2003)

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See detailComparison of the magnetic susceptibility of Belgian and Canadian Frasnian carbonate platforms: Implications for stratigraphic correlation in carbonate strata
Da Silva, Anne-Christine ULg; Weissenberger, John; Potma, KEn et al

in Abstract book - 22th IAS meeting, Opatija, Portugal (2003)

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See detailNon destructive analysis of a 16th manuscript from the Gospel Book of Robert Quercentius
Denoël, Sophie; Weber, Georges ULg; Allart, Dominique ULg et al

in Townsend, Joyce; Eremin, Katherine; Adriaens, Annemie (Eds.) Conservation Science 2002. Papers from the Conference held in Edinburgh, Scotland 22-24 May 2002 (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 detailSurvey of cat and dog dermatophytosis in Europe. The ECMM working group report.
Cabanes, F.; Gallo, M.; Mancianti, F. et al

Conference (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 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 detailLes traitements futurs en allergologie chez le cheval
Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Congrès de l'Association Vétérinaire Equine Française (AVEF) (2003)

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See detailNumerical shear tests for different elasto-plastic laws
de Montleau, P.; Duchene, Laurent ULg; Flores, Paulo et al

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

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu ... [more ▼]

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu's model. These laws take into account respectively isotropic, kinematic and mixed isotropic-kinematic hardening. The goal of the paper is to provide a first numerical idea of the stress-strain path in the center of an experimental test sample. [less ▲]

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See detailDes principes du développement durable à l'écobilan de l'exploitation agricole
Debouche, Charles ULg

in Fagroud, Mustapha; Debouche, Charles; Debbarh, Abdelhafid (Eds.) et al Equilibre Agriculture-Environnement : Enjeux, outils et perspectives du conseil agricole (2003)

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See detailIdentification of heterologous multicopy suppressors of the yeast msb3msb4 double mutation
Delroisse, Jean-Marc; Breban, Martine; Burny, Arsène et al

Poster (2003)

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See detailIncreased dioxin/PCB body burden in diabetics: findings in a population-based study in Belgium
Fierens, S.; Mairesse, H.; Heilier, H. et al

in Organohalogen Compounds (2003), 60-65

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See detailA dual thromboxane inhibitor and thromboxane receptor antagonist prevents pig myocardial infarction induced by coronary thrombosis
Rolin, S.; Petein, M.; Tchana-Sato, Vincent ULg et al

in European Heart Journal (2003), 24(Suppl. S), 325

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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 detailSept cas de réussite "atypique" éclairée par des données longitudinales familiales et scolaires
Schillings, Patricia ULg; Poncelet, Débora

in Actes du 16ème colloque international de l'ADMEE-Europe Evaluation: entre efficacité et équité (2003)

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See detailSaint Remacle de Malmedy et de Stavelot. Entre mythe et réalité
George, Philippe ULg

in « Le monastère de Wavreumont dans l’histoire » (1er-3 mars 2001) (2003)

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See detailIdentification of elastoplastic model parameters in large deformation problems using gamma methods
Jeunechamps, Pierre-Paul ULg; Walmag, J.; Mathonet, V. et al

in Proceedings of the 5th World Congress on Structural and Multidisciplinary Optimization (2003)

This paper reports on preliminary results of parameter identification problems in finite element non-linear analyses such as metal forming simulations. Two approaches are compared. The first one is the ... [more ▼]

This paper reports on preliminary results of parameter identification problems in finite element non-linear analyses such as metal forming simulations. Two approaches are compared. The first one is the classic Levenberg-Marquardt algorithm. The second one is a trust-region algorithm based on a quadratic model. The two algorithms are compared on two cases, one of them being an actuel experiment. [less ▲]

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See detailA New Version of the Moment Method, Optimized for Mode Identification in Multiperiodic Stars
Briquet, Maryline ULg; Aerts, C.

in Asteroseismology Across the HR Diagram (2003)

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See detailEarly effect of strontium ranelate on clinical vertebral fractures in women with postmenopausal osteoporosis
Meunier, P. J.; Marquis, P.; Lemmel, E. M. et al

in BONE (2003), 32(S7), 222

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

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 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 detailValidation and discussion of CALUX analysis for marine samples
Windal, Isabelle; Van Wouwe, Nathalie; Carbonnelle, Sophie et al

in Organohalogen Compounds (2003)

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See detailMise au point d’une procédure de caractérisation quantitative des surfaces démolies en béton en vue de travaux de réfection
Bélair, Normand; Bissonnette, Benoît; Courard, Luc ULg

in Progression de la recherche québécoise sur les ouvrages d'art (2003)

Cet article présente l’état d’avancement d’un projet visant le développement et la validation d’une technique permettant de caractériser de façon quantitative l’intégrité mécanique d’une surface en béton ... [more ▼]

Cet article présente l’état d’avancement d’un projet visant le développement et la validation d’une technique permettant de caractériser de façon quantitative l’intégrité mécanique d’une surface en béton préparée (démolie) aux fins de travaux de réfections superficielles. Dans un premier temps, une étude de l’influence des variables de base (taille des pastilles métalliques, profondeur de forage, nature de l’adhésif, etc.) relatives à l’essai d’arrachement sur la cohésion du béton a été réalisée afin d’optimiser la procédure expérimentale. De plus, les performances comparatives de deux dispositifs d’essai disponibles commercialement ont été évaluées afin d’identifier l’appareil le mieux adapté (facilité et rapidité d’exécution, efficacité, reproductibilité, coût, etc.). Afin de valider le protocole expérimental retenu et d’évaluer quantitativement les effets du mode de démolition, des essais d’arrachement ont été réalisés en laboratoire sur une série d’éléments en béton dont la surface a été préparée au moyen de différentes méthodes de préparation, notamment le marteau pneumatique, la scarification, le jet de sable et le jet d’eau. Une technique de caractérisation quantitative de la rugosité de surface a également été élaborée. Sur la base de ces essais, il est possible d’établir l’influence du mode de démolition sur l’intégrité mécanique de la surface obtenue et d’émettre des recommandations préliminaires. [less ▲]

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See detailLocal Hydrological effects in Membach, Belgium: influence on the long term gravity variation
Van Camp, Michel; Dassargues, A.; Vanneste, K. et al

Conference (2003)

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See detailBehavioral characterization of acetaldehyde in C57BL/6J mice: Anxiolytic, amnesic and hedonic effects
Tambour, Sophie ULg; Quertemont, Etienne ULg; Tirelli, Ezio ULg

in Behavioural Pharmacology (2003), 14(Suppl. 1), 68-69

It has been postulated that a number of central effects of ethanol are mediated through the action of its first metabolite, acetaldehyde. In particular, acetaldehyde might be involved in the anxiolytic ... [more ▼]

It has been postulated that a number of central effects of ethanol are mediated through the action of its first metabolite, acetaldehyde. In particular, acetaldehyde might be involved in the anxiolytic and hedonic effects of ethanol and is therefore believed to play an important role in alcohol abuse. In agreement with this assumption, previous studies indicated that acetaldehyde is mainly reinforcing in rats, which have been shown to readily self-administer acetaldehyde both peripherally and centrally. However, the hedonic effects of acetaldehyde have never been tested in mice, and the possible amnesic and anxiolytic effects of acetaldehyde remain to be elucidated. Therefore, the present studies were aimed at characterizing the anxiolytic, hedonic and amnesic effects of acetaldehyde after its acute peripheral administration to C57BL/6J mice. The effects of intraperitoneal acetaldehyde (0-300 mg/kg) injections were assessed in several classical behavioral tests. The anxiolytic effects were tested with the elevated plus maze, the hedonic effects with the place conditioning procedure and the amnesic effects with the passive avoidance apparatus. Our results show that acetaldehyde dose-dependently altered memory consolidation as evidenced by a reduced performance in the passive avoidance test when acetaldehyde was injected immediately after training at doses between 100 and 300 mg/kg. The elevated plus-maze showed that acetaldehyde, in contrast to ethanol, does not possess anxiolytic properties. Finally, the results of the place conditioning experiment confirmed that acetaldehyde displays significant hedonic properties. The present results add further support to the role of acetaldehyde in ethanol amnesic and hedonic effects but interestingly suggest that acetaldehyde is not involved in ethanol anxiolytic effects. [less ▲]

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See detailA high-order, high-frequency method for surface scattering by convex obstacles
Bruno, O.; Geuzaine, Christophe ULg

in Proceedings of the 14th Conference on the Computation of Electromagnetic Fields, COMPUMAG 2003 (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 detailGeneration of spatially correlated wind histories
Denoël, Vincent ULg

in Proceedings of the first Internation Conference on Finite Element Methods (2003)

Turbulent wind is a natural and therefore random phenomenon. The analysis of flexible structures subjected to turbulent wind requires, in a finite element approach, the resolution of a system of ... [more ▼]

Turbulent wind is a natural and therefore random phenomenon. The analysis of flexible structures subjected to turbulent wind requires, in a finite element approach, the resolution of a system of stochastic differential equations. It is supposed that the characteristics of the structure are perfectly known; thus the stochastic aspect of the problem comes from the random loading only. As the turbulent wind is most commonly characterized by its frequency content, the resolution of this equation is generally performed in the frequency domain. All governing equations must therefore be linear. If this can be reasonably supposed for the structure, this hypothesis is not mathematically justified for the wind loading. When the non linear behaviour of any part of the structure has to be accounted for, the resolution in the frequency domain is not valid anymore. It is then necessary to compute, with a step-by-step dynamic analysis, the response of the structure to a series of generated wind histories. In a finite element approach, this is for example achieved thanks to Newmark’s or Wilson’s methods. Averaging across the ensemble of the computed time-varying responses allows then to recover statistical results that a stochastic analysis would provide. This analysis method is known as a stochastic Monte Carlo simulation. After having emphasised the need to represent correctly the coherence between wind pressures at different points of the structure, this paper will present a method for generating a set of correlated wind histories that must be used in a finite element analysis. Finally an example of application of the presented method will prove its efficiency. [less ▲]

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See detailBehavioral characterization of acetaldehyde in C57BL/6J mice: Locomotor, hypnotic and ataxic effects
Quertemont, Etienne ULg; Tambour, Sophie ULg; Tirelli, Ezio ULg

in Behavioural Pharmacology (2003), 14(Suppl. 1), 69-69

Acetaldehyde, the first ethanol metabolite, was recently suggested to play a major role in many behavioral effects of ethanol. However, no studies have directly investigated the behavioral effects of ... [more ▼]

Acetaldehyde, the first ethanol metabolite, was recently suggested to play a major role in many behavioral effects of ethanol. However, no studies have directly investigated the behavioral effects of acetaldehyde after acute administration. Therefore, the aim of the present study was to characterize the locomotor, hypnotic and ataxic effects of acetaldehyde in C57BL/6J mice. Various acetaldehyde doses (0-300 mg/kg) were injected intraperitoneally and their effects were investigated with several classical behavioral tests. The locomotor effects of acetaldehyde were measured in standard activity boxes. In addition, the loss of righting reflex was used to assess the hypnotic effects of acetaldehyde. Finally, the ataxic effects of acetaldehyde were studied with the horizontal wire test. The results show that acetaldehyde induced a significant hypolocomotor effect at 170 mg/kg and higher doses. In addition, the hypnotic effects of acetaldehyde were evidenced by a loss of righting reflex in doses between 170 and 300 mg/kg. However, the locomotor and hypnotic effects of acetaldehyde were very brief relative to what is observed after ethanol administration. After 170 mg/kg acetaldehyde, normal activity was recovered in less than 30 minutes and the loss of righting reflex lasted only an average of 6.14 ± 1.29 minutes after the administration of 300 mg/kg acetaldehyde, the highest testable dose before lethality. Ataxic effects were observed with lower doses that did not significantly affect locomotor activity. These results show that acetaldehyde, like ethanol, possesses sedative, hypnotic and ataxic properties and therefore indicate that the first product of ethanol metabolism might be involved in these ethanol effects. [less ▲]

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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 detailThe identification of experimental microscopic hafting traces on lithic tools
Rots, Veerle ULg

in Le Sécretariat du Congrès (Ed.) Sessions Générales et Posters / General Sessions and Posters. Acts of the XIVth UISPP Congress University of Liège, Belgium, 2 – 8 September 2001 (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 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 detailEfficient algorithmic approach for mixed lubrication in cold rolling
STEPHANY, A.; Ponthot, Jean-Philippe ULg; COLLETTE, C. et al

in Proceedings of AMPT 2003, Advances in Materials and Processing Technologies (2003)

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See detailHigh level Vibration Facility at cryogenic temperature
Grodent, Christophe ULg

Conference (2003)

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See detailNumerical simulation of Springback using enhanced assumed strain elements
BUI, Q. V.; Papeleux, Luc ULg; Ponthot, Jean-Philippe ULg

in Proceedings of AMPT 2003, Advances in Materials and Processing Technologies (2003)

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See detailPreliminary data on the crystal chemitry of synthetic fillowite-type phosphates
Hatert, Frédéric ULg; Fransolet, André-Mathieu ULg

in Berichte der Deutschen Mineralogischen Gesellschaft : Beihefte zum European Journal of Mineralogy (2003), 15

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See detailOndelettes et télédétection.
Charles, Catherine ULg

in Actes des XXXVèmes Journées de Statistiques (2003)

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See detailCould diffuse modes of failure be analyzed by a material instability condition?
Darve, Félix; Servant, Guillaume; Collin, Frédéric ULg et al

Conference (2003)

Localized modes of failure are classically analyzed by a plastic strain localization criterion given by the vanishing values of the determinant of the acoustic tensor. However, some failure modes do not ... [more ▼]

Localized modes of failure are classically analyzed by a plastic strain localization criterion given by the vanishing values of the determinant of the acoustic tensor. However, some failure modes do not exhibit any localization pattern and a crucial question appears : what is the proper criterion for diffuse failure ? An answer attempt is proposed in this paper in both frameworks of continuum mechanics and discrete mechanics through the second order work criterion. [less ▲]

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See detailFast, sensitive, and comprehensive analytical methods including three-dimensional analysis (GCXGC-TOFMS) for measuring halogenated persistent organic pollutants
Patterson, Donald G.; Turner, Wayman E.; Sjödin, Andreas et al

in Organohalogen Compounds (2003), 60-65

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See detailDégradation du cartilage et stress oxydatif chez des patients arthrosiques et souffrant d'arthrite rhumatoide
Deberg, Michelle; Labasse, A; Christgau, S et al

in Revue du Rhumatisme (2003), 70

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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 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 detailEmotional Processing in Down Syndrome
Catale, Corinne ULg; Hogge, Michaël; Meulemans, Thierry ULg et al

in Books of Abstracts: 13th conference of the European Society for Cognitive Psychology (2003)

In addition to mental retardation, Down Syndrome (DS) children present emotional deficits. Some authors have suggested that the emotional deficits observed in DS can be related to developmental changes ... [more ▼]

In addition to mental retardation, Down Syndrome (DS) children present emotional deficits. Some authors have suggested that the emotional deficits observed in DS can be related to developmental changes. However, the link between emotion and cognitive processing remains unclear.This study aims to assess the relationships between emotional and cognitive processing in DS children. More specifically, we wanted to assess whether cognitive development could predict emotional deficits. Eighteen children DS and 18 chronological age-matched (CA) children were presented with emotional tasks designed to tap their abilities (i) to label emotion through emotional faces and prosody, (ii) to attribute, from stories, cognitive and emotional states to characters and (iii) to process face identity and gaze behaviour. Cognitive functioning was assessed including attentional treatment, visuo-spatial working memory, receptive language and logical reasoning. The results confirmed that DS performed worse on both cognitive and emotional tasks than CA children. There are also strong correlations between cognitive (including language and logical reasoning measures) and emotional measures. These results suggest that emotional troubles in DS are related to their global cognitive development; they also suggest that the degree of mental retardation can predict the importance of emotional deficits in DS. [less ▲]

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