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See detailApplying the electronic nose in the environment : requirements for the sensors
Nicolas, Jacques ULg; Romain, Anne-Claude ULg; Andre, Philippe ULg

in Szuber, Jacek (Ed.) Papers from the 3rd international seminar on semiconductor gas sensors-SGS 2002, Ustron, Poland, 19-22 september 2002 (2002, September)

For few years, the department "Environmental monitoring" at FUL applies the principle of the electronic nose equipped with tin oxide sensors to recognise and to monitor real life malodours in the ... [more ▼]

For few years, the department "Environmental monitoring" at FUL applies the principle of the electronic nose equipped with tin oxide sensors to recognise and to monitor real life malodours in the environment and directly in the field. <br />For such emissions, the gas mixtures are very complex and only their odour should be of interest, and not their chemical composition. <br />Moreover, working in the field implies various constraints. <br />The obstacles of the monitoring of real life environmental odours with an electronic nose can be classified into three main areas : the final goal of the study (measuring an odorous annoyance), the analysed sample itself (influenced by the evolution of the process and of ambient parameters) and the operating conditions (necessity to transport the reference gas and the batteries in the field, influence of air humidity). <br />The paper describes the approach of FUL to the problem with various tests conducted in the field with home-made electronic noses based on tin oxide sensors and with very simple configurations. The conclusions, which can be extrapolated to any other sensor types, are promising, but the sensor performances (sensibility, reproducibility, electrical consumption, drift, etc.) should still be improved before reaching the final goal. [less ▲]

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See detailDesign of an electronic interface for levitated disk accelerometer
Gindila, M.V.; Kraft, Michael ULg

in Proc. of the Symposium on Electronics and Telecommunications Etc. (2002, September)

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See detailSerotype Distribution of clinical isolates of group B streptococci Isolated in Belgium : isolates from neonatal infection compared to isolates from infection in adult or colonization in pregnant women
MELIN, Pierrette ULg; Keke, D.; Campo, B. et al

in American Society of Microbiology (Ed.) Program and Abstracts of the 43rd Intersciences Conference on Antimicrobial Agents and Chemotherapy (2002, September)

Background: Group B Streptococci cause invasive disease in neonates, pregnant women and non-pregnant adults. In the last decades capsular serotypes (type) Ia, Ib, II and III caused the majority of ... [more ▼]

Background: Group B Streptococci cause invasive disease in neonates, pregnant women and non-pregnant adults. In the last decades capsular serotypes (type) Ia, Ib, II and III caused the majority of clinical diseases. More recently, in North America, type V emerged as the more common type in non-pregnant adults with invasive disease. Methods: From January 1999 through December 2001, we received and typed a total of 334 clinically significant strains of GBS isolated in the laboratories belonging to the Belgian network for epidemiological surveillance. 113 were recovered from neonates blood or cerebrospinal fluid (92 early onset EOD, 21 late onset LOD), 14 were isolated from pregnant women with severe infections and 204 were recovered from adults with invasive disease. From the same laboratories, during the first trimester of 2002, 302 isolates from pregnant women were also typed (max. 5 isolates /lab.) Results: In neonatal EOD type III was the more common (41,3%) followed by II (19.6%), Ia (16.3%), Ib (13%), V (8.7%) and IV (1.1%), whereas type III caused the majority (85.7%) of LOD cases. In adults, all types were well represented except type IV: 20.3% Ia, 12.7% Ib, 13.1% II, 23.1% III, 2.7% IV, 19% V and 9% remained non typeable (NT). In colonized pregnant women, all types were also well represented except type IV: 25.5% Ia, 13.3% Ib, 14.9% II, 17.7% III, 5% IV, 15.5% V and 8.1% remained NT. Type III was more frequently the cause of EOD than a colonizing strain during pregnancy and in contrast NT isolates did not cause EOD (P<0.001) Conclusions: 1) Type III was still the major type in neonatal infections in Belgium. 2) Type distribution of GBS differed by age-group of patients 3) Type V belonged to the 3 more represented types in adults 4) Compared to colonizing GBS in pregnant women, distribution of types causing EOD was different. [less ▲]

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See detailMicro-macro analysis of steel sheet behaviour in finite element simulations. Application to deep-drawing process.
Duchene, Laurent ULg; Godinas, A.; Cescotto, Serge ULg et al

in Cescotto, Serge (Ed.) Proceedings of the Sixth European Mechanics of Materials Conference (EMMC6) Non Linear Mechanics of Anisotropic Materials (2002, September)

This paper presents a constitutive law based on Taylor’s model implemented in our non-linear finite element code LAGAMINE. The yield locus is only locally described and a particular interpolation method ... [more ▼]

This paper presents a constitutive law based on Taylor’s model implemented in our non-linear finite element code LAGAMINE. The yield locus is only locally described and a particular interpolation method has been developed. This local yield locus model uses a discrete representation of the material’s texture. The interpolation method is presented and a deep-drawing application is simulated in order to show up the influence of the texture evolution during forming processes. [less ▲]

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See detailParameter sensitivities of a high precision accelerometer
Alavi, F.; Kraft, Michael ULg; Mokhtari, M. et al

in Proc. Eurosensors XVI Conference (2002, September)

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See detailAg/SiO2 and Cu/SiO2 cogelled xerogel catalysts for benzene combustion and 2-butanol dehydrogenation
Lambert, Stéphanie ULg; Tcherkassova, Natalia; Cellier, Caroline et al

in CD-ROM of full texts of the 15th International Congress on Chemical and Process Engineering, CHISA 2002 (Paper P1.24, 9 p.) (2002, August 25)

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See detailAre neural network techniques the solution to measurement validation, monitoring and automatic diagnosis of sensor faults ?
Gaura, E.; Kraft, Michael ULg

in Proc. of the 41st SICE Annual Conference (SICE 2002) (2002, August)

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See detailRumen bypass of free methionine and lysine for double-muscled Belgian Blue bull.
Froidmont, Eric; Rondia, Pierre; Beckers, Yves ULg et al

(2002, August)

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See detailEffect of ovariectomy on daily energy requirement in Beagle dogs
Jeusette, Isabelle; Detilleux, Johann ULg; Cuveler, Christine et al

in Janssens, Geert (Ed.) Proceedings of the Joint Symposium (2002, August)

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See detailAn Adaptation of the Newmark Scheme for the Integrated Simulation of Mechatronic Systems
Bruls, Olivier ULg; Duysinx, Pierre ULg; Golinval, Jean-Claude ULg

in Proceeding of 6th Int. Conf. on Motion and Vibration Control (MOVIC) (2002, August)

A methodology is developed to simulate flexible multibody systems subject to the action of a digital control system. The mechanical model is built in the formalism of flexible multibody dynamics using the ... [more ▼]

A methodology is developed to simulate flexible multibody systems subject to the action of a digital control system. The mechanical model is built in the formalism of flexible multibody dynamics using the Finite Element Method. At the begining of each sampling period, the model of the control system is used to compute the control forces and torques applied to the mechanism. A second-order system with a direct velocity feedback controller is considered to study the performances of the method. A modification of the classical Newmark algorithm yields outstanding improvements in the results quality. [less ▲]

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See detailAtmospheric perturbations on GNSS signals and their influence on time transfer
Warnant, René ULg

in Proceedings of the XXVII URSI General Assembly (2002, August)

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See detailControlled Radical Polymerisation catalysed by rutehnium complexes. Variations on Ru-Cp#
Demonceau, Albert ULg; Delfosse, Sébastien; Guillaume, Bernard et al

in ACS Symposium Series (2002, August)

series of isoelectronic ruthenium-based complexes of the general formula [RuX(Cp#)L2] (Cp# = cyclopentadienyl or cyclopentadienyl derivatives) were synthesized, and their relative catalytic activities ... [more ▼]

series of isoelectronic ruthenium-based complexes of the general formula [RuX(Cp#)L2] (Cp# = cyclopentadienyl or cyclopentadienyl derivatives) were synthesized, and their relative catalytic activities were determined by monitoring the atom transfer radical polymerization of methyl methacrylate, n-butyl acrylate, and styrene. [RuCl(Cp*)(PPh3)2] and [RuCl(Ind)(PPh3)2] were found to be highly efficient catalysts for ATRP, producing polymers with narrow molecular weight distribution (Mw/Mn < 1.2). the following order of increasing efficiency was determined: [RuCl(Cp)(PPh3)2] << [RuCl(ind)(PPh3)2] < [RuCl(Cp*)(PPh3)2]. In sharp contrast, ruthena-carboranes were inefficient for ATRP, demonstrating therefore the prominent role of the Cp# ligand. The effect of the phosphine ligands was also investigated, and additional studies indicated that the release of a phosphine ligand occured prior to the activation of the carbon-halogen bond of both the initiator and polymer growing chain end by the unsaturated ruthenium center. [less ▲]

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See detailEffect of ad libitum feeding on body weight and blood metabolites in spayed female Beagle dogs
Jeusette, Isabelle; Detilleux, Johann ULg; Cuvelier, Christine et al

in Geert Janssens (Ed.) Proceedings of the Joint Nutrition Symposium (2002, August)

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See detailOperational model for real-time reconstruction of the electron density profile using GPS TEC measurements
Stankov, Stanimir; Warnant, René ULg; Jodogne, Jean-Claude

in Proceedings of the XXVII URSI General Assembly (2002, August)

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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 Interplay of Periodic, Cyclic and Stochastic Variability in Selected Areas of the H-R Diagram (2002, July)

We present a numerical version of the moment method for the identification of non-radial pulsation modes. The new version requires less computation time than the previous one, allowing to consider all the ... [more ▼]

We present a numerical version of the moment method for the identification of non-radial pulsation modes. The new version requires less computation time than the previous one, allowing to consider all the information contained in the first three moments of a multiperiodic star and to identify multiple modes simultaneously. This, together with the use of a new discriminant which considers the moments calculated at each time of observation, increases the feasibility and the accuracy of the mode identification for multiperiodic stars. Moreover, the technique is extended to rotating pulsating stars. We apply the new version to three B stars showing multiperiodicity. [less ▲]

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See detailVALIDATION OF “PROCULTURE” MODEL TO PREDICT SEPTORIA TRITICI DEVELOPMENT ON WINTER WHEAT IN THE GRAND-DUCHÉ OF LUXEMBOURG IN 2001.
El Jarroudi, Moussa ULg; Tychon, Bernard ULg; Maraite, Henri

in Villalobos, Francisco J.; Testi, Luca (Eds.) VII Congress of the European Society For Agronomy (2002, July)

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See detailNumerical simulation of thermo-hygromechanical behaviour with pollutant transport in engineered clay barrier.
Li, X. L.; Wu, W.; Charlier, Robert ULg

in Proc. of the Environmental Geomechanics Workshop (2002, July)

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See detailPreseason isokinetic assessment and hamstring strain risk in professional soccer players
Croisier, Jean-Louis ULg; Réveillon, Vincent; Ferret, J. M. et al

in Proceedings of the 7th Annual Congress of the European College of Sport Science (2002, July)

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See detailEccentric training model in chronic epicondylitis treatment
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg; Foidart-Dessalle, Marguerite ULg et al

in Proceedings of the 7th Annual Congress of the European College of Sport Science (2002, July)

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See detailSensitivity Analysis on Ultimate Hull Bending Moment and Multi-Criteria Comparative Analysis of Existing Method
Rigo, Philippe ULg; Toderan, Catalin; Quesnel, T.

in Conf ASRANet, Integrating Structural Reliability Analysis with Advanced Structural Analysis, Session 8 (2002, July)

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See detailDétection des moisissures de l'habitat par un nez électronique
kuske, martyna; Romain, Anne-Claude ULg; Nicolas, Jacques ULg

in actes des conférences Eurodeur-airodeur (2002, June 25)

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See detailExtension of Lyman-alpha Complexes from HST Observations of Four Pairs of Quasars
Aracil, B.; Petitjean, P.; Smette, A. et al

in Combes, F.; Barret, D. (Eds.) SF2A-2002: Semaine de l'Astrophysique Francaise (2002, June 01)

We present HST observations of four pairs of quasars with 2,3 arcmin angular separation and redshift z 0.9. We apply the Nearest-Neighbor method to the sample of observed Lyman-alpha lines with rest ... [more ▼]

We present HST observations of four pairs of quasars with 2,3 arcmin angular separation and redshift z 0.9. We apply the Nearest-Neighbor method to the sample of observed Lyman-alpha lines with rest equivalent width greater than 0.3 Angstrum. According to Monte-Carlo simulations, we detect an excess of coincidences with velocity difference smaller than 500 km/s. [less ▲]

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See detailRealisation of electroplating moulds with different thick photoresists for MEMS applications
Kukharenka, A.; Kraft, Michael ULg

in Proc. 4th International Conference on Material for Microelectronics and Nanoengineering (2002, June)

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See detailThe GENIE nulling experiment
Absil, Olivier ULg; Gondoin, Ph; den Hartog, R. et al

in Combes, F. (Ed.) SF2A-2002: Semaine de l'Astrophysique Francaise (2002, June)

Within the frame of the Darwin program, the European Space Agency and the European Southern Observatory (ESO) intend to build a ground-based technology demonstrator called Darwin-GENIE, using the Very ... [more ▼]

Within the frame of the Darwin program, the European Space Agency and the European Southern Observatory (ESO) intend to build a ground-based technology demonstrator called Darwin-GENIE, using the Very Large Telescope Interferometer (VLTI). The main objective of GENIE is to gain experience in the manufacture and operation of a nulling interferometer representative of the ESA IRSI-Darwin space mission. GENIE will prepare the Darwin science programme through a systematic search for exo-zodiacal dust clouds around Darwin candidate targets. GENIE also aims to perform Darwin related science including the detection of low-mass companions (if possible, hot Jupiters) around nearby stars. The prospective performances of some candidate configurations are presented in this paper. [less ▲]

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See detailAutomata-based Representations for the Verification of Hybrid Systems
JODOGNE, Sébastien ULg

in Proc. Summer School Modelling and Verification of Parallel Processes (MOVEP) (2002, June)

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See detailSimulation of an Active Control System in a Hot-Dip Galvanizing Line
Bruls, Olivier ULg; Golinval, Jean-Claude ULg

in Preprints of the NATO Advanced Study Institute on Virtual Nonlinear Multibody Systems (2002, June)

This paper concerns the modeling and the integrated numerical simulation of a flexible mechanism subject to the action of a digital control system. A general method is proposed, based on the formalism of ... [more ▼]

This paper concerns the modeling and the integrated numerical simulation of a flexible mechanism subject to the action of a digital control system. A general method is proposed, based on the formalism of flexible multibody systems (MBS) using the Finite Element Method (FEM). Nonlinear effects in the mechanical structure or in the control system can be taken into account. The numerical simulation tool is applied to design an active control system in a hot-dip galvanizing line, which aims at reducing the vibrations of the steel strip. [less ▲]

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See detailAn integrated Surface micromachined capacitive lateral accelerometer with 2 uG/rt-Hz resolution
Xuesong, J.; Wang, F.; Kraft, Michael ULg et al

in Tech. Digest of Solid State Sensor and Actuator Workshop (2002, June)

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See detailFeature extraction for non-linear model updating
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in International Conference on Structural Dynamics Modelling, Funchal, 2002 (2002, June)

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See detailOn the optimisation of the mechanical properties of two aluminium-alloyed multiphase TRIP-assisted steels
Mertens, Anne ULg; Jacques, Pascal J.; Harlet, Philippe et al

in De Cooman, Bruno C. (Ed.) Proccedings of the International Conference on TRIP-Aided High Strength Ferrous Alloys (2002, June)

Aluminium-alloyed multiphase TRIP-assisted steels have been recently developed, so as to get rid of the disdavantages related to the high silicon contents classically used so far in TRIP-assisted steels ... [more ▼]

Aluminium-alloyed multiphase TRIP-assisted steels have been recently developed, so as to get rid of the disdavantages related to the high silicon contents classically used so far in TRIP-assisted steels. It has been shown that aluminium has a stronger ferritising effect than silicon and that it is slightly less efficient as far as austenite retention is concerned. A careful selection of the aluminium content and of the processing conditions is thus of primary importance in order to optimise the mechanical properties. The present study aims at determining the optimal heat treatment conditions leading to enhanced mechanical properties for two low aluminium-alloyed grades containing with mass contents of 0.12% C, 1.5% Mn and 0.5% Al or 1.0% Al, respectively. The microstructures generated during the heat treatment were assessed using SEM, X-ray diffraction and Mössbauer spectrometry. The mechanical properties were evaluated by uniaxial tensilte testing and the strain-hardening behaviour was characterised by means of an incremental strain-hardening exponent. The relations between the observed microstructures and the mechanical properties were discussed and, as a consequence, the importance of a careful control of the isothermal bainitic holding was highlighted. [less ▲]

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See detailEvaluating bounds on voltage and thermal security margins under power transfer uncertainty
Capitanescu, Florin ULg; Van Cutsem, Thierry ULg

(2002, June)

This paper deals with the evaluation of bounds on voltage and thermal security margins with respect to contingencies. A margin is the maximual pre-contingency power transfer between either a generation ... [more ▼]

This paper deals with the evaluation of bounds on voltage and thermal security margins with respect to contingencies. A margin is the maximual pre-contingency power transfer between either a generation and a load area or two generation areas, such that the specified contingencies do not overload lines or make the system voltage unstable. The minimum and maximum margins are computed for given intervals of variations of bus injections. Each bound is the solution of a constrained L1-norm minimization (or maximization) problem, for which specific algorithms are given. Thermal overloads are handled through linearization, while for voltage stability, fast time simulation and instability mode analysis are used. Nonlinear situations of branch overloads are also considered. The method is illustrated on an 80-bus test system. [less ▲]

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See detailEvaluating bound on voltage and thermal security margins under power transfer uncertainty.
Van Cutsem, Thierry ULg

(2002, June)

This paper deals with the evaluation of bounds on voltage and thermal security margins with respect to contingencies. A margin is the maximal pre-contingency power transfer between either a generation and ... [more ▼]

This paper deals with the evaluation of bounds on voltage and thermal security margins with respect to contingencies. A margin is the maximal pre-contingency power transfer between either a generation and a load area or two generation areas, such that specirfied contingencies do not overload lines or make the system voltage unstable. The minimum and maximum margins are computed for given intervals of variations of bus injections. Each bound is the solution of a constrained L1-norm minimization (or maximization) problem, for which specific algorithms are given. Thermal overloads are handled through linearization, while for voltage stability, fast time simulation and instability mode analysis are used. Nonlinear situations of branch overload are also considered. The method is illustrated on an 80-bus test system. [less ▲]

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See detailCharacterisation of TRIP-assisted steel by atomic force microscopy and OIM
Ros-Yanez, Tanya; Houbaert, Yvan; Petrov, Roumen et al

in De Cooman, Bruno C. (Ed.) Proceedings of the International Conference on TRIP-Aided High-Strength Ferrous Alloys (2002, June)

TRIP-assisted steel has a complicated microstructure, obtained through well designed heat treatments and consisting of different phases, mainly ferrite, retained austenite, bainite and martensite. The ... [more ▼]

TRIP-assisted steel has a complicated microstructure, obtained through well designed heat treatments and consisting of different phases, mainly ferrite, retained austenite, bainite and martensite. The drastic influence of microstructure on physical and mechanical properties makes metallographic examination a necessity for property understanding and enhancement. A fairly simple tint etching procedure (LePera method) using light microscopy and SEM observation ensures the distinction of ferrite, bainite and retained austenite/martensite grains. Nevertheless, the etching is not selective enough to allow a distinction between retained austenite and martensite. Atomic force microscopy was used for the phase identification and characterisation of this kind of steel. A series of tests was performed using AFM-contact mode and magnetic force microscopy in C-Mn-Si and C-Mn-Al TRIP-assisted steel after intercritical annealing followed by ageing, After ageing, some samples were tempered in order to make metallographic observation easier. It has been possible to identify the different phases and their topographic characteristics and to study their morphology using AFM. Orientation imaging microscopy was used to calibrate the observations done with AFM, distinguishing between bcc- and fcc-zones and quantify the retained austenite. [less ▲]

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See detailAdaptation dynamique des débits des couches pour la transmission vidéo multipoint
Bonmariage, Nicolas; Leduc, Guy ULg

in Obaid, A. (Ed.) Ingénierie des protocoles - Réseaux mobiles et ad hoc, qualité de service, multimédia, ingénierie de trafic (2002, May 27)

The heterogeneous environment of multicast video streams naturally raises a network performance issue which can be addressed using a layered transmission scheme. A receiver is able to adapt the flow rate ... [more ▼]

The heterogeneous environment of multicast video streams naturally raises a network performance issue which can be addressed using a layered transmission scheme. A receiver is able to adapt the flow rate to its capacity by choosing an adequate subscription level among the different layers. A traditional static approach doesn't allow a full usage of the network capacity and should be combined with an adaptive transmission rate in each layer. We study the dynamic rate adaptation problem and develop a framework integrating a multirate adaptation algorithm and a transmission protocol for layered multicast video. Our main focus is the development of an adaptation algorithm offering rates matching the capacities of the receivers. We also want to set up a congestion control scheme and offer fairness towards TCP flows, while keeping a scalable framework. We evaluate and analyze the proposed architecture using simulations to point out its main characteristics. [less ▲]

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See detailComparaison quantitative de différentes techniques de restauration rapide dans les réseaux IP/MPLS
Mélon, Laurent; Leduc, Guy ULg

in Obaid, A. (Ed.) Ingénierie des protocoles - Réseaux mobiles et ad hoc, qualité de service, multimédia, ingénierie de trafic (2002, May 27)

This article is dealing with a quantitative comparison of different fast restoration approaches in the context of a Multi-Protocol Label Switching (MPLS) network. The objective is to analyse the general ... [more ▼]

This article is dealing with a quantitative comparison of different fast restoration approaches in the context of a Multi-Protocol Label Switching (MPLS) network. The objective is to analyse the general behaviour of these approaches (local rerouting, edge-to-edge rerouting, ...) in case of failure by means of simulations. This study is realised in the context of Best Effort only traffic, routing being done with a shortest paths algorithm. Many papers justify the choice between an edge-to-edge or a local scheme by means of intuition and then present a new algorithm for routing backup paths which try to optimize some parameters. Our approach aims to clarify the situation by comparing by means of concrete results the pros and cons of each mechanism. [less ▲]

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See detailL'approche en "Coût Client", une méthologie de calcul des coûts propre à l'entreprise orientée "Client"
Van Caillie, Didier ULg; Kabwigiri, Charles ULg

in Association Francophone de Comptabilité (Ed.) Actes du 23ème Congrès Francophone de Comptabilité (2002, May 16)

This paper explores, essentially in a conceptual perspective, a new cost accounting method focused on the characteristics of a "client-oriented" company and allows to fuel its management control ... [more ▼]

This paper explores, essentially in a conceptual perspective, a new cost accounting method focused on the characteristics of a "client-oriented" company and allows to fuel its management control information system with specific data on which both operational and strategic management decisions may be based. The first step of its implementation into a company from the wood industry is also discussed. [less ▲]

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See detailErysipelothrix rhusiopathiae infection in stranded harbour porpoise (Phocoena phocoena) and harbour seal (Phoca vitulina)
Boseret, Géraldine ULg; Jauniaux, Thierry ULg; Mainil, Jacques ULg

in anton, erken (Ed.) Proceedings of the 4th scientific meeting of the European Association of Zoo and Wildlife Veterinarians and 5th meeting of the European Wildlife Disease Assocation : Heidelberg, Germany 2002 / editor Anton ERKEN. (2002, May 08)

An adult female harbour porpoise (Phocoena phocoena ) and a juvenile male harbour seal have been found dead on a Belgian beach in autumn 2001. The two bodies were in good condition (CC = 2). Pure and ... [more ▼]

An adult female harbour porpoise (Phocoena phocoena ) and a juvenile male harbour seal have been found dead on a Belgian beach in autumn 2001. The two bodies were in good condition (CC = 2). Pure and abundant growth of a small rod-shaped, Gram-labile bacterium was obtained aerobically and anaerobically on Columbia bloodagar from the heart blood, the mouth, the pharynx, the lungs, the intestine and the anus of the porpoise, and from the intestine, the pharynx, the mouth, the nose and the anus of the seal. The colonies were surrounded by a narrow zone of a-hemolysis. The catalase- and peroxydase-tests gave negative results. Rapid ID 32 Strepto (Biomérieux, France) sugar tests applied on porpoise’s heart blood, lungs and intestine, and on seal’s intestine and pharynx identified this isolate to Erysipelothrix rhusiopathiae. Erysipelothrix rhusiopathiae is not reported as a common cause of infection and death in wild cetaceans and wild pinnipeds in opposite to respectively captive dolphins and sea lions. Nevertheless, E. rhusiopathiae can be considered as the cause of death of the stranded harbour porpoise as it was present in heart blood and internal organs, and the seal was carrying the bacterium with lesions of enteritis which could be associated with E. rhusiopathiae infectio [less ▲]

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See detailPreliminary results for measuring bovine PAG in milk samples
Metelo, R; Sulon, J; Moreira da Silva, F et al

in Proceeding of preliminary results for measuring bovine PAG in milk samples (2002, May 03)

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See detailIncreased cell proliferation-but not reduced cell death-induces lymphocytosis in Bovine Leukaemia Virus-infected sheep
Debacq, Christophe; Asquith, B.; Kerkhofs, Pierre et al

in Abstracts of papers presented at the 2002 meeting of retroviruses (2002, May)

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See detailIntegrated simulation of mechanical structures and their control system
Bruls, Olivier ULg; De Boe, Pascal; Duysinx, Pierre ULg et al

in Proc. of the 2nd Int. Conf. on Advanced Computational Methods in Engineering (ACOMEN) (2002, May)

This paper concerns the modeling and the integrated numerical simulation of flexible mechanisms subject to the action of a digital control system. A general method is proposed, based on the formalism of ... [more ▼]

This paper concerns the modeling and the integrated numerical simulation of flexible mechanisms subject to the action of a digital control system. A general method is proposed, based on the formalism of flexible multibody systems (MBS) using the Finite Element Method (FEM). Nonlinear e ects in the mechanical structure or in the control system can be taken into account. The numerical simulation tool is applied to design an active control system in a hot-dip galvanizing line, which aims at reducing the vibrations of the steel strip. [less ▲]

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See detailSelection of approximation schemes in topology optimization
Bruyneel, Michaël ULg; Duysinx, Pierre ULg

in Hogge, Michel (Ed.) Proceedinsg of the ACOMEN 2002, 2nd International Conference on Advanced Computational Methods in Engineering (2002, May)

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See detailUtilisation de la méthode LQRT (Lecture / Questions - Réponses / Test) -- SAFE (Système Adulte de Formation et d'Évaluation) en médecine vétérinaire.
Castaigne, Jean-Loup ULg

in Actes du 19ème Colloque de l'AIPU : Les méthodes actives dans l'enseignement supérieur : Regards pluriels et critiques sur les pratiques. (2002, May)

Suite aux résultats d’une évaluation des enseignements par les étudiants, nous avons décidé de mettre en place une nouvelle stratégie de formation centrée sur l’étudiant. La méthode des LQRT (Lecture ... [more ▼]

Suite aux résultats d’une évaluation des enseignements par les étudiants, nous avons décidé de mettre en place une nouvelle stratégie de formation centrée sur l’étudiant. La méthode des LQRT (Lecture, Questions-Réponses, Test) - SAFE (Système Adulte de Formation et d’Évaluation) a été choisie pour dispenser 5 cours portant sur des matières dont la compréhension est importante pour la réussite de l’examen oral de fin d’année. La conclusion directe de l’utilisation de ce système d’enseignement a été une participation plus active des étudiants au cours mais également une responsabilisation de l’apprenant dans le processus de formation par la définition des performances cognitives. Les tests pratiqués durant l’année constituent une évaluation diagnostic pour l’enseignant qui a pu remédier dès le cours suivant aux problèmes de compréhension mis en évidence par le test. Les retombées indirectes comme les gains métacognitifs et l’acquisition d’autres compétences ne sont pas mesurables. Une nouvelle évaluation de l’enseignement a montré que les étudiants ont apprécié l’instauration des LQRT-SAFE en médecine vétérinaire. [less ▲]

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See detailSpringback Prediction in Sheet Metal Forming
Papeleux, Luc ULg; Ponthot, Jean-Philippe ULg

in Proceedings of ACOMEN 2002 (2002, May)

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See detailEncapsulation of thrombin receptor agonist peptide in PLGA beads
Grandfils, Christian ULg; Markvicheva, E; Barakat, I et al

in COST Proceedings, S.II-2, 33-36 (2002, April 26)

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See detailThe concept of "Economic Added Result", a new tool to prevent bankruptcy ?
Van Caillie, Didier ULg; Dighaye, Andrée

in European Accounting Association (Ed.) Proceedings of the 25th European Accounting Association Congress (2002, April 25)

Business failure has been one of the most investigated topics in the finance and the strategic literature during the last seven decades. However, most of this literature has been heavily focused on ... [more ▼]

Business failure has been one of the most investigated topics in the finance and the strategic literature during the last seven decades. However, most of this literature has been heavily focused on business failure prediction (with a clear focus on short-term prediction) and, simultaneously, only a few studies have investigated business failure prevention, focusing on understanding how a company may fail through "failure paths" and on the identification of very early warning financial and non-financial signals and symptoms. This may be explained by a conceptual difficulty to exactly represent what business failure prevention may mean and by a practical difficulty to build a financial indicator really allowing to announce a bankruptcy at least three years or more in advance, giving then time to potential corporate recovery. With this paper, we then propose an investigation of this concept of "Business Failure Prevention" and we test on a sample of 6 250 Belgian SMEs the ability of a specific financial indicator (referred as "Economic Added Result" and based on the amount of accounting value added which remains within a company when it has paid for its internal and external production factors) to effectively predict a business failure at least three years before it happens. [less ▲]

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See detailNoise considerations for closed loop digital accelerometers
Gaura,E; Kraft, Michael ULg

in Proc. 5rd Conf. on Modelling and Simulation of Microsystems (2002, April)

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See detailL'EAD au service d'une approche centrée sur l'apprenant et sur la médiatisation de l'expérience
Georges, François ULg; Demily, Fabian; Leclercq, Dieudonné ULg et al

(2002, April)

Le Laboratoire de Soutien à l’Enseignement Télématique (LabSET, directrice : M. Poumay) a, entre autres, pour mission d’aider les enseignants et les formateurs à concevoir et à développer leurs cours et ... [more ▼]

Le Laboratoire de Soutien à l’Enseignement Télématique (LabSET, directrice : M. Poumay) a, entre autres, pour mission d’aider les enseignants et les formateurs à concevoir et à développer leurs cours et activités sur Internet. Nous travaillons non seulement avec des institutions d’enseignement supérieur (Université et Hautes Ecoles), mais aussi avec des centres de formation, des centres de compétences, des organismes d’insertion socio-professionnelle et des fédérations d’entreprises. Ces partenariats ont dernièrement fait l’objet de deux projets : Technifutur, du nom de son commanditaire, et FORMADIS subsidié par la Communauté Européenne, le Ministère de l’emploi et de la formation de la région wallonne et le Ministère de l’enseignement supérieur de la Communauté Française de Belgique. L'article décrit ces initiatives. [less ▲]

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See detailAlgorithms for openings of binary and label images with rectangular structuring elements
Van Droogenbroeck, Marc ULg

in Talbot, Hugues; Beare, Richard (Eds.) International Symposium on Mathematical morphology (ISMM) (2002, April)

Two new families of algorithms for computing openings of binary and label images are presented in this paper. The first family of algorithms is based on an horizontal scan, and a vertical scan that takes ... [more ▼]

Two new families of algorithms for computing openings of binary and label images are presented in this paper. The first family of algorithms is based on an horizontal scan, and a vertical scan that takes the result of the horizontal scan as input. With the results of these two scans it is possible to compute an opening with respect to a rectangle of any size. The second family of algorithms is based on the construction of an exhaustive list of rectangles included in an object. Rectangles of this list all have a maximal extension, i.e. no larger rectangle included in a region contains them. The opening then results from filling the output image with rectangles larger than the structuring element. After a description of the algorithms we provide a comparison of several algorithms in terms of computation time efficiency. The comparison shows that some of the new algorithms advantageously compete with existing algorithms. [less ▲]

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See detailIdentification of the nonlinear function in a vibrating nonlinear beam
Dimitriadis, Grigorios ULg; Cooper, Jonathan E

in Lees, A. W.; Prells, U.; Norton, J. (Eds.) Proceedings of the Third International Conference on Identification in Engineering Systems (2002, April)

The Constant Level Identification (CLI) method for nonlinear dynamical systems has been shown to identify accurately a wide variety of systems with discrete degrees of freedom. In this paper, the method ... [more ▼]

The Constant Level Identification (CLI) method for nonlinear dynamical systems has been shown to identify accurately a wide variety of systems with discrete degrees of freedom. In this paper, the method is applied to a continuous nonlinear system, namely a simulated model of a vibrating beam attached to a nonlinear spring. A Rayleigh-Ritz series representation of the beam is assumed in order to extract the desired number of modal responses. Then, a combination of modal and physical coordinates are used in the identification process. It is shown that the CLI method can accurately capture the shape of the nonlinearity in the system. [less ▲]

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See detailSeismic Tomography and Ground Penetrating Radar Applied On Rock Slope Instability Analysis. Application On A Limestone Cliff In The Chartreuse Massif, France
Dussauge-Peisser, C; Wathelet, M; Jongmans, D et al

in EGS General Assembly Conference Abstracts (2002, April)

Abstract: Evaluating the stability state of a rock slope is a complex problem, mainly due to the number of possible failure mechanisms, and to the lack of knowledge of the real present state of the rock ... [more ▼]

Abstract: Evaluating the stability state of a rock slope is a complex problem, mainly due to the number of possible failure mechanisms, and to the lack of knowledge of the real present state of the rock mass. Geophysical methods appear as a useful tool for inves-tigating the deep discontinuity pattern, which is poorly known from surface observa-tions. However they have seldom been applied on steep rock slopes. The aim of this study is to test some of these methods on subvertical cliffs. We investigate the quality of information that they can ... [less ▲]

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See detailSevere Psittacosis in Children
Senterre, Thibault ULg; Lepage, Philippe; Senterre, Jean-Marc

in 10th International Congress of Infectious Disease (2002, March 12)

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See detailForm@HETICE : un dispositif de formation continuée des formateurs d'enseignants à un usage critique des Technologies de l'Information et de la Communication
Charlier, B.; Denis, Brigitte ULg

in Actes du 2e Congrès des chercheurs en Éducation (2002, March)

Form@HETICE1 est un dispositif original de formation continuée des formateurs d’enseignants à un usage critique des Technologies de l’Information et de la Communication au sein des catégories pédagogiques ... [more ▼]

Form@HETICE1 est un dispositif original de formation continuée des formateurs d’enseignants à un usage critique des Technologies de l’Information et de la Communication au sein des catégories pédagogiques des Hautes Ecoles (HE). Deux problématiques complémentaires guident la conception de ce dispositif : celle des usages éducatifs des TIC aux niveaux de la formation des futurs enseignants et des pratiques dans les écoles primaires et secondaires (Quels usages éducatifs des TIC?) (Denis, 2002) et celle plus globale de l’implantation d’une innovation qui tient compte du contexte organisationnel au sein duquel ce processus prend place : une rénovation d’ensemble des programmes de formation d’enseignants promue par le Ministère de la Communauté française (Quelle démarche d’intégration des TIC dans les pratiques de formation des enseignants ?). La prise en compte de ces deux problématiques a conduit une équipe de recherche collaborative à proposer des actions complémentaires qui dépassent la simple organisation de sessions de formation : • la mise en place d’un réseau de partage de ressources, • l'organisation de formations adaptées aux besoins des personnes ressources, • l'accompagnement de projets d'équipe dans chacune des Hautes Ecoles, • des actions parallèles concernant l’installation de « cybercentres » dans les établissements. Ces actions visent à produire un effet démultiplicateur : des personnes ressources participant au réseau forment leurs collègues, qui à leur tour forment les futurs enseignants amenés à introduire les TIC dans les activités menées avec leurs élèves. [less ▲]

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See detailNumerical determination of 3D temperature fields in steel joints
Franssen, Jean-Marc ULg; Brauwers, Luc

in Proceedings of the 2nd International workshop Structures in Fire (2002, March)

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See detailAn entropy based technique for information embedding in images
Van Droogenbroeck, Marc ULg; Delvaux, Jérôme

in IEEE Signal Processing Symposium, Proceedings (2002, March)

Many information hiding techniques have recently been analyzed as they could help manage part of the digital rights. Among the general framework of information hiding, the focus has been put on ... [more ▼]

Many information hiding techniques have recently been analyzed as they could help manage part of the digital rights. Among the general framework of information hiding, the focus has been put on steganography and on watermarking techniques. This paper proposes an entropy based technique for data embedding in images with a specific target, sometimes referred to as feature location: inclusion of a maximum amount of information instead of robustness against attacks. After an introduction, we analyze the error that results from a modification of the least significant bits. Then we describe our embedding technique. Finally we examine the upper bound of information that can be embedded in the least significant bits by means of our technique and we conclude. [less ▲]

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See detailEvolution du fractionnement de la fumure azotée
Bodson, Bernard ULg; Vancutsem, Françoise ULg; Falisse, André

in Livre Blanc: Céréales - Gembloux (2002, February 27)

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See detailLes conseils de fumure azotée
Bodson, Bernard ULg; Destain, Jean-Pierre ULg; Vancutsem, Françoise ULg et al

in Livre Blanc: Céréales - Gembloux (2002, February 27)

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See detailFongicides en froment
Moreau, Jean-Marc; Bodson, Bernard ULg; Vancutsem, Françoise ULg

in Livre Blanc: Céréales - Gembloux (2002, February 27)

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See detailL'azote minéral du sol en 2001-2002 sous froment d'hiver
Bodson, Bernard ULg; Destain, Jean-Pierre ULg; Vancutsem, Françoise ULg et al

in Livre Blanc: Céréales - Gembloux (2002, February 27)

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See detailIn vivo cell turnover in BLV-infected sheep.
Debacq, Christophe; Asquith, B.; Kerkhofs, Pierre et al

in Société Belge de Biochimie et de Biologie moléculaire (2002, February 22)

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See detailInteracting surface of the receptor-binding domain.
GATOT, Jean-Stéphane ULg; Callebaut, Isabelle; Van Lint, Carine et al

in Société Belge de Biochimie et de Biologie moléculaire. (2002, February 22)

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See detailPlasma pregnancy-associated glycoprotein (PAG) profiles in sheep
Ledezma-Torres, R.A; Beckers, Jean-François ULg; Holtz, W

in Proceeding of the 35th Annual Meeting on Physiology and Pathology of Reproduction of the German Veterinary Medical Society (2002, February 14)

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See detailFrequency domain approaches for the identification of an experimental beam with a local nonlinearity
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in 20th International Modal Analysis Conference, Los Angeles, 2002 (2002, February)

Two approaches for the identification of multi-degree-of-freedom non-linear systems in the frequency domain have recently been introduced, i.e., the conditioned reverse path (CRP) method and the non ... [more ▼]

Two approaches for the identification of multi-degree-of-freedom non-linear systems in the frequency domain have recently been introduced, i.e., the conditioned reverse path (CRP) method and the non-linear identification through feedback of the outputs (NIFO) method. The key idea of these methods is to eliminate the distortions caused by the presence of non-linearities in frequency response functions. In this paper, the theoretical background of the CRP and NIFO methods is briefly recalled. Then, the ability of these techniques to identify the behaviour of an experimental cantilever beam with a local geometrical non-linearity is tested. The results obtained with both methods are compared and discussed. [less ▲]

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See detailDesign of Load Shedding Schemes against Voltage Instability using Combinatorial Optimization
Van Cutsem, Thierry ULg; Moors, Cedric; Lefebvre, Daniel

(2002, January 31)

This paper proposes a methodology for the design of automatic load shedding against voltage instability. In a first step, we describe a method allowing to find the minimal shedding required in a given ... [more ▼]

This paper proposes a methodology for the design of automatic load shedding against voltage instability. In a first step, we describe a method allowing to find the minimal shedding required in a given unstable scenario. In a second step, we describe the structure of various controllers and identify the parameters to be optimized. Next, we present an optimization approach to find the controller parameters which optimize an overall performance objective. Results are presented on the Hydro-Québec system, in which load shedding is presently planned. [less ▲]

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See detailDissipative Forces and External Resonances
Jancart, Sylvie ULg; Lemaitre, Anne

in Richardson, David; Seidelmann, Kenneth; Wnuk, Edwin (Eds.) Dynamics of Natural and Artificial Celestial Bodies (2002, January 01)

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See detailContext awareness for application sharing in teaching environment
Burger, C.; Bullinger, Eric ULg; Papakosta, S. et al

in Int. Conf. Advances in Infrastructure for e-Business, e-Education, e-Science, and e-Medicine on the Internet (SSGRR 2002w) (2002, January)

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See detailQuelle rééducation pour quelle pathologie d’épaule ?
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg

in Actes des IVèmes Journées Interdisciplinaires de Médecine, Kinésithérapie et Podothérapie (2002, January)

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See detailEvaluation et rééducation isocinétiques de l’épaule
Croisier, Jean-Louis ULg; Forthomme, Bénédicte ULg

in Actes des IVèmes Journées Interdisciplinaires de Médecine, Kinésithérapie et Podothérapie (2002, January)

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See detailIn situ conservation of wild populations of Phaseolus lunatus in the Central Valley of Costa Rica.
Maquet, A.; Baudoin, Jean-Pierre ULg

in Report of a Working Group on Grain Legumes. Third meeting, Krakow,Poland, 5-7 July 2001 (2002)

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See detailDesign of a linear transverse flux actuator
Vande Sande, Hans; Deliège, Geoffrey ULg; Hameyer, Kay et al

in 15th International conference on electrical machines (ICEM), n°152, Brugge, Belgium, August 25-28, 2002 (2002)

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See detailPolymerization in Inverse Microemulsion: An Effective Tool to Produce Biodegradable and non Biodegradable Nanoparticles
Lebon, F; Grandfils, Christian ULg; Jérôme, Robert ULg et al

in Proceedings of Material Research Society (MRS) (2002)

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See detailIngestion and metabolic profile in horses offered lucerne or chalk as a source of calcium
de Behr, V.; Daron, D.; Gabriel, Annick ULg et al

in Proceedings of the British Society of Animal Science (2002)

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See detailThe north-eastern Black Sea redox zone hydrochemical structure: observed concentrations and estimated fluxes
Yakushev, E.V.; Chasovnikov, V.K.; Debolskaya, E.I. et al

in Proceedings of the Second International conference. Oceanography of the eastern Mediterranean and Black Sea. Similarities and differences of two interconnected basins, Zappeion international conference Centre (2002)

The fine structure of the hydrophysical and hydrochemical parameters observed in the northeastern Black Sea during the 1999-2002 RV ”Akvanavt” cruises is discussed. The observed increase of organic ... [more ▼]

The fine structure of the hydrophysical and hydrochemical parameters observed in the northeastern Black Sea during the 1999-2002 RV ”Akvanavt” cruises is discussed. The observed increase of organic phosphorus and urea at the boundary of oxic and anoxic waters testify that the hydrochmical structure is significantly influenced by chemosynthesis. The calculated nitrogen compound fluxes support the idea that organic nitrogen can be the significant part of total nitrogen in the oxic/anoxic interface. [less ▲]

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See detailIs it safe to design a building structure with simple connections, when they are known to exhibit a semi-rigid behaviour
Braham, M.; Jaspart, Jean-Pierre ULg

in Proceedings of the Third European Conference on Steel Structures (EUROSTEEL) (2002)

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See detailDeterministic and stochastic modelling for protection zone delineation
Rentier, Céline; Dassargues, Alain ULg

in Calibration and Reliability in Groundwater Modelling: A Few Steps Closer to Reality (2002)

Protection zones delimited by isochrones are often computed using calibrated groundwater flow and transport models. In heterogeneous formations, all direct (hard) and indirect (soft) data must be used ... [more ▼]

Protection zones delimited by isochrones are often computed using calibrated groundwater flow and transport models. In heterogeneous formations, all direct (hard) and indirect (soft) data must be used optimally. Approaches involving in situ pumping and tracer tests, combined with geophysical and/or other geological observations, should be developed. In a deterministic framework, the calibrated model is considered to be the best representation of reality at the current investigation stage, but uncertainty of the results is not quantified. Using stochastic methods, a range of equally likely isochrones can be produced, allowing us to quantify the influence of our knowledge on the aquifer parameters on protection-zone uncertainty. Furthermore, integration of soft data in a conditioned stochastic generation process, possibly associated with an inverse modelling procedure, can reduce the resulting uncertainty. Proposed is a stochastic methodology for protection-zone delineation, integrating hydraulic conductivity measurements (hard data), head observations and electrical resistivity data (soft data). [less ▲]

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See detailFinite element thermo-mechanical model of continuous steel casting
Pascon, Frédéric ULg; Habraken, Anne ULg

in Kiuchi, M.; Nishimura, H.; Yanagimoto, J. (Eds.) Proceedings of the 7th International Conference on Advanced Technology of Plasticity (2002)

Problems in continuous casting of steel are numerous and have been leading producers to find ever more efficient solutions. Wa have developed a thermomechanical model of continuous casting, using a non ... [more ▼]

Problems in continuous casting of steel are numerous and have been leading producers to find ever more efficient solutions. Wa have developed a thermomechanical model of continuous casting, using a non-linear finite element code. Since a complete 3D discretization seemed impossible, the model has been based on a generalized plane strain state (2D1/2) and it includes at the same time thermal exchanges, mechanical behaviour of steel at very high temperature, the ferrostatic pressure and contact between the strand and the machine. This paper presents some results of two industrial applications. First results tend to prove the importance of some process factors (such as the mould taper) and local defects of the machine on the quality of cast products, according with observations. [less ▲]

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See detailLe groupe de pâtes « savonneuses » des céramiques gallo-romaines du nord de la Gaule Belgique
Deru, Xavier ULg

in Rivet (Ed.) Actes de la Société française d’étude de la céramique en Gaule, Bayeux, 2002 (2002)

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See detailThe Possible Use of VHR Satellite Images in the Public Agencies in Belgium: Brussels, Ghent & Liège from Space.
Binard, Marc ULg; Muller, Fabrice; Donnay, Jean-Paul ULg

in Maktav, Derya; Jürgens, Carsten; Erber Sunar, Filiz (Eds.) et al Proceedings of the 3d International Symposium of Remote Sensing of Urban Areas (2002)

The City promotion project aims at arousing the awareness and possible use of the Very High Resolution (VHR) satellite images in the public agencies and education sector. This project is presently ... [more ▼]

The City promotion project aims at arousing the awareness and possible use of the Very High Resolution (VHR) satellite images in the public agencies and education sector. This project is presently financed by the Belgian federal Office for Scientific, Technical and Cultural affairs (OSTC). Il this purpose, a poster has been prepared showing the three main towns in Belgium _ Brussels, Ghent and Liège - and a website has been devoted to the project. The core of the cities is represented by satellite maps at 1: 5 000 scale. Ikonos panchromatic and multispectral images are merged together in order to obtain coloured images at 1 m resolution able to render the urban fabric of these old cities. Moreover small excerpts at enlarged scale (1: 3 000) show typical places and building in panchromatic mode. The excerpt selected on the famous Brussels “Grand Place” is used to illustrate the fusion process between the panchromatic (1 m) and the multispectral (4 m) images. Two small scale insets present the regional context of these three towns thanks to a natural colour composite made of Landsat 7 ETM+ images on the one hand, and a classical physical map on the other hand. Various exploitations in the classroom of this poster, and others of the same kind, are suggested on the related website (http://www.geo.ulg.ac.be/eduweb). [less ▲]

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See detailConstitutive modeling of chalk. Application to waterflooding
Charlier, Robert ULg; Collin, Frédéric ULg; Schroeder, Christian ULg et al

in Auriault, J. L.; Geindreau, C.; Royer, P. (Eds.) Poromechanics II (2002)

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into ... [more ▼]

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into account these two effects. It is based on frictional – cap elastoplasticity and on the Barcelona unsaturated soil model. Oil – water – chalk interaction is modeled through the suction variable. In a second step, viscous effects are added to the model. After implementation into a finite element code, these tools allow to simulate a waterflooding experiment on a chalk sample. The model appears to reproduce qualitatively and quantitatively the experimental results. [less ▲]

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See detailAppetency and preference in horses offered lucerne or chalk as a source of calcium
de Behr, V.; Daron, D.; Cabaraux, Jean-François ULg et al

in Proceedings of the British Society of Animal Science (2002)

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See detailRégénération de Phaseolus vulgaris L. et P. polyanthus Greenm. à partir d'embryons immatures en vue de leur hybridation interspécifique
Toussaint, André ULg; Geerts, P.; Clément, F. et al

in Actes des VIIIèmes Journées Scientifiques du Réseau "Biotechnologies, Amélioration des plantes et Sécurité alimentaire" (2002)

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See detailDéficience sévère en hormone de croissance chez les patients non diabétiques avec un microadénome corticotrope : Effets de la chirurgie hypophysaire et implications thérapeutiques
Valdes Socin, Hernan Gonzalo ULg; Laret, V.; de Fays, C. et al

in XXème Congrès de la Société Française d'Endocrinologie - Abstract book (2002)

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See detailEdición versus traducción: Victoria Ocampo en la literatura argentina
Willson, Patricia ULg

in Rodríguez, Beatriz (Ed.) Actas del III Congreso Latinoamericano de Traducción e Interpretación. De Babel a Internet (2002)

En este trabajo se examinan dos prácticas centrales de la intervención de Victoria Ocampo en la cultura argentina: la edición y la traducción. Como traductora, su trayectoria se caracterizó por la ... [more ▼]

En este trabajo se examinan dos prácticas centrales de la intervención de Victoria Ocampo en la cultura argentina: la edición y la traducción. Como traductora, su trayectoria se caracterizó por la publicación de versiones teatrales de escritores del siglo XX como Colette o Graham Greene, de quien tradujo el teatro completo. Como editora, su labor en la revista Sur (fundada en 1931) y la editorial del mismo nombre (fundada en 1933) le confirió un papel central en la difusión de la literatura extranjera en la Argentina. [less ▲]

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See detailSituation actuelle de la qualité des sols et des eaux dans le périmètre irrgué des Doukkala (Maroc)
Rahoui, M.; Soudi, B.; Badraoui, M. et al

in Actes du séminaire de Rabat (2002)

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See detailRegistration of transcranial magnetic stimulation, a visualization tool for brain functions
Noirhomme, Quentin ULg; Romero, E.; Cuisenaire, O. et al

in Proceedings of 14th International Conference on Digital Signal Processing (2002)

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See detailFACTS devices controlled by means of reinforcement learning algorithms
Ernst, Damien ULg; Wehenkel, Louis ULg

in Proceedings of the 14th Power Systems Computation Conference (PSCC 2002) (2002)

Reinforcement learning consists of a collection of methods for approximating solutions to deterministic and stochastic optimal control problems of unknown dynamics. These methods learn by experience how ... [more ▼]

Reinforcement learning consists of a collection of methods for approximating solutions to deterministic and stochastic optimal control problems of unknown dynamics. These methods learn by experience how to adjust a closed-loop control rule which is a mapping from the system states to control actions. This paper proposes an application of reinforcement learning methods to the control of a FACTS device aimed to damp power system oscillations. A detailed case study is carried out on a synthetic four-machine power system. [less ▲]

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See detailGenetic algorithm optimisation of transient two-phase water pressures inside closed-end rock joints
Bollaert, Erik; Erpicum, Sébastien ULg; Pirotton, Michel ULg et al

in Schleiss, Anton; Bollaert, Erik (Eds.) Rock Scour due to falling high-velocity jets (2002)

High-velocity plunging water jets, appearing at the downstream end of dam weirs and spillways, can create scour of the rock. The prediction of this scour is necessary to ensure the safety of the toe of ... [more ▼]

High-velocity plunging water jets, appearing at the downstream end of dam weirs and spillways, can create scour of the rock. The prediction of this scour is necessary to ensure the safety of the toe of the dam as well as the stability of its abutments. A physically based engineering model has been developed at the Laboratory of Hydraulic Constructions for evaluation of the ultimate scour depth. This model is based on experimental measurements of water pressures at plunge pool bottoms and inside underlying rock joints. The pressures inside the joints revealed to be of highly transient nature and governed by the presence of free air. Hence, a numerical modelling of these pressures was performed, in collaboration with the Laboratory of Applied Hydrodynamics and Hydraulic Constructions (HACH), based on the one-dimensional transient flow equations applied to a pseudo-fluid. The amount of free air is a function of the instantaneous pressure inside the joint and has been accounted for by means of appropriate celerity-pressure relationships. These relationships are defined by the ideal gas law and Henry’s law and were optimised by means of a genetic algorithm optimisation technique. Very good agreement has been obtained between the measured and computed pressures at the end location of one-dimensional closed-end rock joints. [less ▲]

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See detailPour une formation des futurs instituteurs à une autre didactique des sciences à l'école primaire
Brouwir, Christine ULg; Hindryckx, Marie-Noëlle ULg; Stegen, Pierre

in Herphelin, Martine (Ed.) Actes du 2° congrès des chercheurs en éducation : L'école, dans quel(s) sens? (2002)

Cette recherche s’inscrit en réponse aux constats alarmants concernant l’enseignement des sciences en Communauté française de Belgique.: il s’agit notamment d’une certaine désaffection des jeunes pour des ... [more ▼]

Cette recherche s’inscrit en réponse aux constats alarmants concernant l’enseignement des sciences en Communauté française de Belgique.: il s’agit notamment d’une certaine désaffection des jeunes pour des formations à caractère scientifique ; des performances insuffisantes de nos étudiants, lors des tests internationaux comparatifs ; d’un malaise des enseignants face à la mise en place d'activités scientifiques à caractère expérimental dans les classes primaires et de l’utilisation insuffisante des nombreuses ressources existantes en sciences. Pour expliquer ces constats, un diagnostic souvent posé concerne le déficit quantitatif et qualitatif de l’enseignement des sciences expérimentales. Ce double déficit se constate dès le primaire. Il renvoie à un manque de formation à l’approche expérimentale des instituteurs en fonction aujourd’hui. L’objet de la recherche collaborative est d’étudier les difficultés rencontrées par les normaliens dans la mise en place d’activités à caractère scientifique. La question centrale de cette recherche peut être formulée de la manière suivante : « Comment incorporer, dans le curriculum de formation des futurs instituteurs, des mises en situation favorisant le développement de leur capacité à construire des activités d’apprentissage faisant intervenir des démarches expérimentales ? ». Pour apporter des éléments de réponse à cette question, nous avons privilégié l’hypothèse de travail suivante : l’amélioration des compétences scientifiques des élèves passe nécessairement par une meilleure formation des enseignants. Pour concrétiser cette hypothèse, nous avons fait délibérément le choix d’agir au niveau de la formation initiale des enseignants (construction d'un module de formation). [less ▲]

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See detailSpeed of sound measurements in the evaluation of bone properties in Holstein
Sandersen, Charlotte ULg; Guyot, Hugues ULg; Vandeputte, Sébastien ULg et al

in Proceedings of the XXII World Buiatrics Congress (2002)

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See detailInsert'Prof. Pour un dispositif de formation favorisant une insertion réussie dans la vie professionnelle
Beckers, Jacqueline ULg; Andrianne, Sabine; Bourguignon, Luc et al

in Actes du 2e congrès des chercheurs en éducation (2002)

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See detailFrequency dependence of Penh-index in healthy kittens
Kirschvink, N.; Vincke, G.; Marville, M. et al

in 20th Veterinary Comparative Respiratory Society - Boston, Massachussetts - USA - Octobre 2002 (2002)

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See detailMemory for temporal context: Effects of aging and retrieval strategies
Bastin, Christine ULg; Van der Linden, Martial ULg

in Proceedings of the International Conference Binding in Human Memory: A neurocognitive approach (2002)

The purpose of the present study was to re-explore the effects of age on memory for temporal context, assessed by a list discrimination task. Contrary to previous studies, each list (with faces as stimuli ... [more ▼]

The purpose of the present study was to re-explore the effects of age on memory for temporal context, assessed by a list discrimination task. Contrary to previous studies, each list (with faces as stimuli) was associated with a different type of judgement (honesty versus intelligence rating). The results showed no age differences on this task when no particular retrieval strategy was induced. However, when participants were encouraged to retrieve the list of occurrence of the items by retrieving the type of judgement made at encoding, there was an age effect. Older adults’ performance was at chance, whereas younger adults had a good performance. Moreover, younger adults who reported using the strategy performed as well as younger adults who did not use it. These results will be discussed by reference to the distinction between automatic versus effortful encoding processes. [less ▲]

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See detailSingle step synthesis of metal catalysts supported on porous carbon with controlled texture
Job, Nathalie ULg; Ferauche, Fabrice; Pirard, René ULg et al

in Studies in Surface Science and Catalysis (2002)

This paper presents an original preparation method of metal catalysts supported on carbon porous material [1]. Carbon porous materials can be synthesised by evaporative drying and pyrolysis of aqueous ... [more ▼]

This paper presents an original preparation method of metal catalysts supported on carbon porous material [1]. Carbon porous materials can be synthesised by evaporative drying and pyrolysis of aqueous resorcinol-formaldehyde gels whose operating, variables are correctly chosen. The porous texture of these materials is mainly controlled by the precursor solution pH. Texture analysis shows that it is possible to tailor the morphology of these materials : indeed, micro-macroporous, micro-mesoporous, microporous or non porous materials can be obtained by varying the pH value in a narrow pH interval. This texture control is slightly influenced by the introduction of a metal in the gel : the limits of the pH interval can slightly differ when a metal salt is added to the resorcinol-formaldehyde aqueous solution. Carbon supported nickel and palladium catalysts prepared by this method have proven to be active for ethylene hydrogenation. [less ▲]

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See detailA constitutive model for North Sea Chalk. Application to reservoir compaction and to waterflooding
Charlier, Robert ULg; Collin, Frédéric ULg; Schroeder, Christian ULg et al

in Pande, G. N.; Pietruszczak, S. (Eds.) Nomerical models in Geomechanics (2002)

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into ... [more ▼]

Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into account these two effects. It is based on frictional – cap elastoplasticity and on the Barcelona unsaturated soil model. Oil – water – chalk interaction is modeled through the suction variable. The two saturating fluids flow is also developed. After implementation into a finite element code, these tools allow to simulate a waterflooding experiment on a chalk sample. The model appears to reproduce qualitatively and quantitatively the experimental results. [less ▲]

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See detailSpace Geodesy at the Royal Observatory of Belgium
Dehant, Véronique; Bruyninx, Carine; Defraigne, Pascale et al

in COSPAR report Period 2000-2001, Part III (A) (2002)

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See detailLogique et limites de terroir, une perspective sociologique de la production à la consommation
Stassart, Pierre M ULg

in Actes de la journée d'étude BAMST, les produits de viande, les enjeux de la qualité (2002)

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See detailChansons liégeoises de conscrits. La mise en page de la voix populaire
Droixhe, Daniel ULg

in Leclerc, M.-D.; Robert, A. (Eds.) Chansons de colportage (2002)

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See detailForward observables at RHIC, the Tevatron Run II and the LHC
Cudell, Jean-René ULg; Ezhela, V. V.; Gauron, P. et al

in Fiore, R.; Jenkowszky, L. (Eds.) DIFFRACTION 2002, Interpretation of the New Diffractive Phenomena in Quantum Chromodynamics and in the S-Matrix Theory (2002)

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on ... [more ▼]

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on total cross sections for gamma p -> hadrons at cosmic-ray energies and for gamma gamma -> hadrons up to sqrt(s)=1 TeV. These predictions are based on a study of many possible analytic parametrisations and invoke the current hadronic dataset at t=0. The uncertainties on total cross sections, including the systematic theoretical errors, reach 1% at RHIC, 3% at the Tevatron, and 10% at the LHC, whereas those on the rho parameter are respectively 10%, 17%, and 26%. [less ▲]

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See detailLe prologue en blanc du Lancelot en prose
Combes, Annie ULg

in Baumgartner, Emmanuèle; Harf-Lancner, Laurence (Eds.) Seuils de l'œuvre dans le texte médiéval (2002)

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See detailThe Slowly Pulsating B Star HD 147394
Briquet, Maryline ULg; Noels-Grötsch, Arlette ULg; Aerts, C. et al

in Aerts, Conny; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen (Eds.) RADIAL AND NONRADIAL PULSATIONS AS PROBES OF STELLAR PHYSICS (2002)

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See detailEffets de l’environnement proche sur la biodiversité entomologique en carottes de plein champ
Colignon, Pierre; Hastir, Pierre; Gaspar, Charles et al

in Annales de la 2ème Conférence Internationale sur les moyens alternatifs de lutte contre les organismes nuisibles aux végétaux (2002)

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