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See detailEarly prediction of electric power system blackouts by temporal machine learning
Geurts, Pierre ULg; Wehenkel, Louis ULg

in Proceedings of ICML-AAAI 98 Workshop on "Predicting the future: AI approaches to time series analysis" (1998)

This paper discusses the application of machine learning to the design of power system blackout prediction criteria, using a large database of random power system scenarios generated by Monte-Carlo ... [more ▼]

This paper discusses the application of machine learning to the design of power system blackout prediction criteria, using a large database of random power system scenarios generated by Monte-Carlo simulation. Each scenario is described by temporal variables and sequences of events describing the dynamics of the system as it might be observed from real-time measurements. The aime is to exploit the data base in order to derive as simple as possible rules which would allow to detect an incipient blackout early enough to prevent or mitigate it. We propose a novel "temporal tree induction" algorithm in order to exploit temporal attributes and reach a compromise between the degree of anticipation and selectivity of detection rules. Tests are carried out on a a data base related to voltage collapse of an existing large scale power system. [less ▲]

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See detailSimulation of the annual plankton productivity cycle in the Black Sea with a 3D high resolution interdisciplinary model
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Papailiou, K.D.; Tsahalis, D.; Periaux, J. (Eds.) et al Proceedings of the 4th European Computational Fluid Dynamics Conference (ECCOMAS) (1998)

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See detailOralité et comicité
Defays, Jean-Marc ULg

in Actes du XXI Congrès international de linguistique et de philologie romanes (1998)

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See detailLes compétences métacognitives et la résolution des problèmes chez des adolescents de l'enseignement secondaire spécial de forme trois : étude exploratoire
Beckers, Jacqueline ULg; Puissant, Fanny

in Depover, Christian; Noël, Bernadette (Eds.) Approches plurielles de l'évaluation des compétences et des processus cognitifs : Actes du 12e colloque de l'ADMEE 1998, Université de Mons-Hainaut (1998)

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See detailDétermination du besoin en méthionine du taurilon Blanc Bleu Belge culard en croissance.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Rencontres Recherches Ruminants. (1998)

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See detailMorphometry of diamond superabrasives using image analysis
Pirard, Eric ULg; Nivart, Jean-François

in Proceedings 7th European Symposium on Particle Characterization (1998)

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See detailParametric definition of sandblasted and polished concrete surfaces
Courard, Luc ULg

in Sandrolini, Franco (Ed.) ICPIC 98 (1998)

A lot of considerations have been developed on the influence of surface roughness on the adherence of a repairing systems on a concrete support : sandblasting, hammering, hydroblasting, acid attacks,… ... [more ▼]

A lot of considerations have been developed on the influence of surface roughness on the adherence of a repairing systems on a concrete support : sandblasting, hammering, hydroblasting, acid attacks,… have been analysed by a lot of authors. This presentation gives a parametric interpretation of a sandblasted surface in comparison with a polished concrete. A stylus is walked along the surface to be analysed and the profile is continuously registered. The filtration of the electric signal is realised in order to separate waviness and roughness. The effect of the stylus/component profile contact on the validity of the measurement results is of prime importance. Profilometry and surfometry are mathematically described by statistical and amplitude parameters. The analysis of surfometry profiles let us to observe and quantify the shape regularity and the isotropic effect of sandblasting. The bearing ratio curves permit to quantify the volume of voids able to absorb the slurry or the repairing mortar applied on the support. The difference, between the two surface treatments is clearly quantified and related to adherence properties of some hydraulic binders. [less ▲]

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See detailAccuracy of digital measurements in optical microscopy imaging
Pirard, Eric ULg; Correa de Araujo, Maria

in Proceedings 7th European Congress for Stereology (1998)

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See detailDifferential diagnosis of tachypnea in newborn calves : a field study
Rollin, Frédéric ULg; Dardenne, A; Danlois, F et al

in In Proceedings of the World Assoc. Buiatrics Congress (1998)

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See detailPotentiels d'application de deux souches de levures vis-à-vis des maladies de conservations des pommes
Jijakli, Haissam ULg; Grevesse, cathy; Lepoivre, Philippe ULg

in 1er colloque transnational sur les luttes biologique, integree, et raisonnee, le 21,22 et 23 janvier 1998 (1998)

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See detailStranding in Belgium
Jauniaux, Thierry ULg; Coignoul, Freddy ULg

in meeting report (1998)

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See detailEffective porosity values used in calibrated transport simulations in a fissured and slightly karstified chalk aquifer
Hallet, Vincent; Dassargues, Alain ULg

in Herbert, M.; Kovar, K. (Eds.) Groundwater Quality 1998, Tübinger Geowissenschaftliche Arbeiten (TGA) (1998)

In fissured and slighly karstified chalks, the main difficulty for modelling groundwater flow and transport consists in finding a good approximation of the highly heterogeneous reality by a REV concept ... [more ▼]

In fissured and slighly karstified chalks, the main difficulty for modelling groundwater flow and transport consists in finding a good approximation of the highly heterogeneous reality by a REV concept. No major problem is encountered for groundwater flow simulations when the high contrast in hydraulic conductivity can be given to the cells/elements of the model. The Darcy’s law is applied in terms of specific flow rate, through the REV. When considering transport, it is often assumed that the calibrated field of hydraulic conductivity should be kept unchanged. Consequently, ‘physically non acceptable’ values of the effective porosity are often needed to obtain a match between modelled and measured breakthrough curves. The model becomes, to some extent, a black-box model. [less ▲]

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See detailThermo-hydro-mechanical coupling in clay barriers
Li, Xian Ling; Collin, Frédéric ULg; Radu, Jean-Pol ULg et al

in Evangelista, Aldo; Picarelli, Luciano (Eds.) The Geotechnics of Hard soils, Soft Rocks (1998)

A complete thermo-hydro-mechanical model is presented to tackle the complex coupling problems encountered in clay barriers. A detailed formulation coupling the heat, moisture (liquid water and water ... [more ▼]

A complete thermo-hydro-mechanical model is presented to tackle the complex coupling problems encountered in clay barriers. A detailed formulation coupling the heat, moisture (liquid water and water vapour) and, air transfer in a deformable unsaturated soil is given. The formulation of the Alonso-Gens’s mechanical model for unsaturated soil is also incorporated. The sensitivity to some parameters and their determinations are analysed. Finally, a small scale wetting – heating test on compacted bentonite is performed for validation; the numerical results are compared to the experimental measurements. [less ▲]

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See detailAn Extension of the Radial Return Algorithm to Account for Visco- Plasticity and Rate-Dependent Effects in Frictional Contac
Ponthot, Jean-Philippe ULg

in Proceedings of "World Congress on Computational Mechanics IV" (1998)

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See detailThermo-hydro-mechanical coupling in clay barriers
Collin, Frédéric ULg; Li, Xiang Ling; Charlier, Robert ULg et al

in Thimus, Jean-Francois; Abousleiman, Y.; Cheng, A. H. D. (Eds.) et al Poromechanics. A tribute to Maurice A. Biot (1998)

A complete thermo-hydro-mechanical model is presented to treat the complex coupling problems in the clay barrier. The formulation related to the heat transfer, moisture transfer (liquid water and water ... [more ▼]

A complete thermo-hydro-mechanical model is presented to treat the complex coupling problems in the clay barrier. The formulation related to the heat transfer, moisture transfer (liquid water and water vapour), air transfer in a deformable unsaturated soil is given. The formulation of the Alonso-Gens’s mechanical model for unsaturated soil is also incorporated. Finally, a small scale wetting – heating test on compacted bentonite is performed as a validation test. The numerical results are compared with respect to the experimental measurements. [less ▲]

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See detailThe St-Michel reconstruction-project in Liège : A morphological regulation case study
Teller, Jacques ULg; Dupagne, A.

in Proc. of COST Urban Civil Engineering - Action C4 Final Conference (1998)

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See detailPonctuation et récit de paroles dans les éditions originales des contes de Voltaire
Tilkin, Françoise ULg

in Defays, Jean-Marc; Rosier, Laurence; Tilkin, Françoise (Eds.) A qui appartient la ponctuation ? Actes du Colloque international et interdisciplinaire de Liège (13-15 mars 1997) (1998)

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See detailContact Algorithms for Numerical Modeling of Tribological Devices
CHABRAND, P.; DUBOIS, F.; GRAILLET, D. et al

in Proceedings of "First ESAFORM Conference on Material Forming (1998)

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See detailForestry curricula at the University Faculty of Gembloux
Rondeux, Jacques ULg

in Schmidt, Pieter; Huss, Jürgen; Lewark, Siegfried (Eds.) New requirements for University Education in Forestry (1998)

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See detailA Quasi-Coulomb Model for Frictional Contact Interfaces
GARCIA-GARINO, C.; Ponthot, Jean-Philippe ULg; OLIVER, J.

in Idelsohn, S.; Onate; Dvorkin (Eds.) Proceedings of "World Congress on Computational Mechanics IV (1998)

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See detailA simple adaptive observer for nonlinear systems
Bullinger, Eric ULg; Ilchmann, Achim; Allgöwer, Frank

in IFAC Nonlinear Control Systems Design, NOLCOS98 (1998)

We present a high-gain observer for nonlinear uniformly observable SISO systems for which the high-gain parameter is determined adaptively online. The adaptation scheme is simple and universal in the ... [more ▼]

We present a high-gain observer for nonlinear uniformly observable SISO systems for which the high-gain parameter is determined adaptively online. The adaptation scheme is simple and universal in the sense that it is independent of the system the observer is designed for. Unlike in an earlier approach, the gain is adapted continuously in the present paper. This further simplifies the adaptation law and also leads to lower values of the high-gain parameter. We prove that the observer output error becomes smaller than a user specified bound for large times and that the adaptation converges. The observer is applied to a generic bioreactor [less ▲]

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See detailAn inventory of emerging innovation project in belgium, Typical and traditional products: rural effect and agro-industrial problems, Parma – Italy ,
Van Huylenbroeck, I.; Verhaegen, Ingrid; Collet, Eric et al

in Proceeding of the 52nnd Seminar of the EAAE (1998)

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See detailPractical protocol for large marine mammals necropsy and beach management
Jauniaux, Thierry ULg; Garcia Hartmann, M.; Coignoul, Freddy ULg

in meeting report (1998)

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See detailThéorie et typographie : une synthèse des règles typographiques de la ponctuation
Purnelle, Gérald ULg

in Tilkin, Françoise; Defays, Jean-Marc; Rosier, Laurence (Eds.) « À qui appartient la ponctuation ? », Actes du colloque international et interdisciplinaire de Liège (13–15 mars 1997) (1998)

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See detailLa gestion de trésorerie centralisée : une opportunité pour la Région et la Communauté ?
Husson, Jean-François ULg; Steylaers, Jean-Luc

in Thys-Clément, Françoise (Ed.) Wallonie et Bruxelles : évolution et perspectives (1998)

This papers presents some examples of centralized treasury management in public administrations (Federal government, Social Security and in Flanders) and simulates the possible benefit of such a mechanism ... [more ▼]

This papers presents some examples of centralized treasury management in public administrations (Federal government, Social Security and in Flanders) and simulates the possible benefit of such a mechanism at the level of the Walloon Region and French Speaking Community. [less ▲]

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See detailThree years research on the behaviour of an African catfish Heterobranchus longifilis : daily rhythms of activity, terrestrial locomotion, reproduction and development.
Poncin, Pascal ULg; Hannosset, S.; Petitfrere, P. et al

in Grizel, H.; Kestemont, P. (Eds.) Aquaculture and water, fish culture, shellfish culture and water usage (1998)

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See detailThe 3nu3 bands of isotopic ozone 668 and 686
Chichery, A.; Barbe, Alain; Bourgeois, M.T. et al

in Atmospheric Spectroscopy Applications 1999 - Proceedings (1998)

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See detailEffects of the interaction between habitat properties and disturbance characteristics on the interior/edge ratio.
Bogaert, Jan ULg; Verbeeck, A; Impens, I

in Farina, A (Ed.) Proceedings of the VII International Congress of Ecology (1998)

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See detailA Unified Radial Return Scheme for Visco-PLasticity and Lubricated Friction
Ponthot, Jean-Philippe ULg

in Proceedings of "First ESAFORM Conference on Material Forming (1998)

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See detailThe Tribology of Valve Seals in Cryogenic Rocket Engines
de Lamotte, E.; Bozet, Jean-Luc ULg; Garcia Marirrodriga, C.

in 7th European Space Mechanisms and Tribology Symposium (1998)

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See detailInégalités et pauvreté mesures et déterminants
Delhausse, Bernard; Perelman, Sergio ULg

in 13ème Congrès des Economistes Belges de Langue Française (1998)

Hormis le fait que plus du 10% des travailleurs potentiels se retrouvent hors du circuit du travail, d’autres indicateurs, surtout de type social ou de santé publique, laissent entrevoir une aggravation ... [more ▼]

Hormis le fait que plus du 10% des travailleurs potentiels se retrouvent hors du circuit du travail, d’autres indicateurs, surtout de type social ou de santé publique, laissent entrevoir une aggravation certaine des inégalités au sein de la société belge. Cette contribution montre que le bilan de la Belgique et de ses régions, qui peut encore être jugé positif à maints égards, doit être nuancé par la mise en évidence de groupes à risques, fortement fragilisés par les années de crise. En mettant en perspective la situation des régions et des différentes catégories de population, nous soulignons les divergences existant entre ces régions en termes de groupes à risques. En effet, en Flandre ou en Wallonie, ce ne sont pas les mêmes groupes de personnes qui sont les plus exposés à l’écueil de la pauvreté. Nous nous interrogeons enfin sur l’avenir du système de protection sociale et en particulier sur l’impact que pourraient avoir sur la pauvreté des réductions de prestations sociales, notamment en région wallonne comme corollaire à une éventuelle régionalisation de ce système. Même s’il s’agit d’un exercice de simulation purement hypothétique, nous montrons que la situation de certains groupes pourrait rapidement s’aggraver. [less ▲]

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See detailEtude comparative de la technique du gaz-test, de la digestibilité de la matière organique par la cellulase et de la composition chimique d'Andropogon gayanus pour la prédiction de sa valeur énergétique et de son ingestibilité chez le mouton Peul-Peul.
Ndimubandi, Albéric; Dieng, Abdoulay; Fonck, Myriam et al

in 5èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 2-3 décembre 1998 (1998)

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See detailAcamprosate appaers to improve survival in alcohol-dependent rats during multiple successive withdrawals
De Witte, Philippe; Ward, Roberta; Dahchour, Abdelkhader et al

in Campral highlights, focus on advances in alcoholism (1998)

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See detailRelaxed Assumptions for Iteration Methods
Brohé, Myrana; Tossings, Patricia ULg

in Nguyen, Van Hien; Strodiot, Jean-Jacques; Tossings, Patricia (Eds.) OPTIMIZATION (V.H. Nguyen - J.J. Strodiot - P. Tossings Editors), Proceedings BFG, Namur (1998)

We consider a general inexact interative method for finding a fixed point of a nonexpansive mapping on a real Hilbert space. Proofs of convergence of sequences generated by such a method generally require ... [more ▼]

We consider a general inexact interative method for finding a fixed point of a nonexpansive mapping on a real Hilbert space. Proofs of convergence of sequences generated by such a method generally require at least that the error term goes to zero. The aim of the present paper is to weaken this nonrealistic theoretical assumption. The obtained result is applied to the proximal point algorithm. [less ▲]

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See detailCampral: from basic mechanisms to clinical reality
De Witte, Philippe; Ward, Roberta; Dahchour, Abdelkhader et al

in Drugs in focus: Campral - Acamprosate, focus on advances in alcoholism (1998)

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See detailAn Efficient Implicit Scheme for the Treatment of Frictional Contact between Deformable Bodies
GRAILLET, D.; Ponthot, Jean-Philippe ULg

in Proceedings of "First ESAFORM Conference on Material Forming" (1998)

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See detailRadial Return Extension for the Numerical Simulation of Viscoplastic Processes
Ponthot, Jean-Philippe ULg

in Proceedings of “NUMIFORM'98, Simulation of Materials Processing: Theory, Methods and Applications (1998)

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See detailPeriod doubling as a means of representing multiply instantiated entities
Sougné, Jacques ULg

in Gernsbacher, Morton Ann; Derry, Sharon J. (Eds.) Proceedings of the Twentieth Annual Conference of the Cognitive Science Society (1998)

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See detailThe spectrum of MEN1 gene mutations in Belgian patients with MEN1 and related diseases
Poncin, Jacques ULg; Abs, R.; Velkeniers, B. et al

in The 5th International Pituitary congress - Abstract book (1998)

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See detailTowards improved evaluations of total ozone at the Jungfraujoch, using vertical profile estimations based on auxiliary data
De Mazière, Martine; Hennen, Olivier; Van Roozendael, Michel et al

in Proceedings of "The XXVIII Quadrennial Ozone Symposium", L’Aquila, Italy, September 12-21, 1996 (1998)

The currently available database of total ozone amounts observed at the Jungfraujoch site in the Swiss Alps starts in 1984, based on high-resolution infrared solar absorption spectroscopic measurements ... [more ▼]

The currently available database of total ozone amounts observed at the Jungfraujoch site in the Swiss Alps starts in 1984, based on high-resolution infrared solar absorption spectroscopic measurements, and has been complemented by daily SAOZ data since mid-1990. The latter instrument (Système d'Analyse par Observations Zénithales) measures the ozone column by application of the DOAS (Differential Optical Absorption Spectroscopy) method to zenith-sky scattered-light spectra in the ultraviolet-visible range, taken at twilight. The actual intercomparison for the overlapping period reveals a negative systematic offset of the FTIR with respect to the SAOZ data of 3.8 % on average, but showing a seasonal variation in the difference. Part of the observed difference probably originates in the model atmospheres that influence the retrieved column differently for each technique. This work shows the development of a climatological ozone vertical distribution model that is more representative of the real atmosphere, exploiting daily meteorological data that are commonly available at the Jungfraujoch site. It argues that the use of this climatological model may improve the accuracy of the retrieved total columns, and hence the agreement between the SAOZ and FTIR datasets; some possible improvements to the model are suggested. Application of this concept to a re-analysis of past observations, making use of existing meteorological long-term records, will enhance the validity of the ozone database at the Jungfraujoch. [less ▲]

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See detailEntre "rallonge" et "rupture", les constructions en cum postposées chez Tacite
Longrée, Dominique ULg

in Longrée, Dominique; Ternes, Charles-Marie (Eds.) Oratio soluta - Oratio numerosa : les mécanismes linguistiques de cohésion et de rupture dans la prose latine, Actes des 8es Rencontres scientifiques de Luxembourg, 1995 (1998)

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See detailLa prescription extinctive en droit du travail
Kefer, Fabienne ULg; Clesse, Jacques ULg

in Formation permanente, CUP, La prescription (1998)

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See detailProlégomènes à une théorie unifiée de la temporalité en égyptien
Winand, Jean ULg

in Proceedings of the Seventh International Congress of Egyptologists (1998)

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See detailRecent Characteristic Budgets of Inorganic Chlorine and Fluorine above the Jungfraujoch Station
Mahieu, Emmanuel ULg; Zander, Rodolphe ULg; Mélen, Francine et al

in Harris, N. R. P.; Kilbane-Dawe, I.; Amanatidis, G.T. (Eds.) Proceedings of the 4th European Symposium on Polar Stratospheric Ozone 1997 (1998)

Within the frame of NDSC (Network for the Detection of Stratospheric Change)-related monitoring activities conducted at the International Scientific Station of the Jungfraujoch (Swiss Alps, 46.5°N, 8.0°E ... [more ▼]

Within the frame of NDSC (Network for the Detection of Stratospheric Change)-related monitoring activities conducted at the International Scientific Station of the Jungfraujoch (Swiss Alps, 46.5°N, 8.0°E, 3580 m a.s.l.), long-term investigations of the inorganic chlorine and fluorine budgets have been pursued during the last years. They are based on the analysis of high-resolution infrared solar spectra, recorded with grating and Fourier transform state-of-the-art spectrometers. Nonlinear least squares fittings of synthetic spectra to the observations are performed over selected intervals, encompassing characteristic absorptions of HCl, ClONO2, HF and COF2; this allows the retrieval of their total vertical column abundances above the Jungfraujoch and the evaluation of their budgets. [less ▲]

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See detailLa ponctuation avant la ponctuation. L’organisation du message écrit dans l’Égypte pharaonique
Winand, Jean ULg

in À qui appartient la ponctuation ? (1998)

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See detailGround-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion
Paton Walsh, C.; Bell, W.; Blumenstock, T. et al

in Harris, N. R. P.; Kilbane-Dawe, I.; Amanatidis, G.T. (Eds.) Polar stratospheric ozone 1997 (1998)

Fourier transform infra-red (FTIR) measurements of stratospheric trace species have been made at a network of five ground-based sites from 79°N to 47°N during the Northern hemisphere winter of 1995/1996 ... [more ▼]

Fourier transform infra-red (FTIR) measurements of stratospheric trace species have been made at a network of five ground-based sites from 79°N to 47°N during the Northern hemisphere winter of 1995/1996. This winter was extremely cold with temperatures below the threshold for type 1 polar stratospheric cloud (PSC) formation from mid December 1995 until early March 1996 when there was a rapid warming of the stratosphere. Over 25 days experienced temperatures low enough for ice cloud (PSC type 2) formation. Vertical columns values for HCl, ClONO2, HF and HNO3 have been derived from FTIR measurements at the following sites: Ny Alesund, Spitzbergen (79°N, 12°E); Kiruna, Sweden (67°N, 21°E); Harestua, Norway (60°N, 11°E); London, England (51°N, 0°E) and the Jungfraujoch, Switzerland (48°N, 8°E), with measurements of other stratospheric trace gases, including O3 and ClO available from some of the sites. All of these sites are equipped with high resolution Bruker 120HR or 120M spectrometers, recording atmospheric spectra in the mid infrared using the Sun as a source. These measurements have been used to provide both evidence of substantial activation within large areas of the polar vortex and a subsequent O3 depletion. The measurements suggest a well mixed central vortex area surrounded by a vortex edge that may be highly variable in composition. The measurements also provide evidence of substantial mixing of activated air from the edge of the polar vortex into middle latitudes. Comparison with the SLIMCAT 3D chemical transport model highlights the underestimation of ClONO2 concentrations in the model, with subsequent implications for underestimating O3 loss. [less ▲]

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See detailStiffness design of column bases
Braham, M.; Jaspart, Jean-Pierre ULg

in Proceedings of the Second World Conference on Constructional Steel Design (1998)

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See detailCovalent liquids: tight binding simulation versus experimental results
Gaspard, Jean-Pierre ULg; Bichara, C.; Raty, Jean-Yves ULg et al

(1998)

We show that a simple tight binding model with a repulsive potential describes the Peierls distortions in covalent systems and the well-known octet rule. The existence and the intensity of the Peierls ... [more ▼]

We show that a simple tight binding model with a repulsive potential describes the Peierls distortions in covalent systems and the well-known octet rule. The existence and the intensity of the Peierls distortion is mainly related to the hardness of the repulsive potential as demonstrated both by theoretical calculations and by the experimental systematic analysis of liquid structures. In particular, As is threefold coordinated and Sb is sixfold coordinated in the liquid; the qualitative difference is explained by the ratio of the distortion energy DeltaE to the thermal energy k BT. The As xSb 1-x alloys show continuously varying average coordination numbers showing that the semiconductor-metal transition is continuous with concentration. In addition, we illustrate in the case of liquid Se that, tight binding Monte Carlo simulations are able to describe quantitatively the structure of liquid elements provided the Van der Waals potential is added [less ▲]

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See detailSélection assistée par marqueurs génétiques en spéculation laitière.
Parmentier, Isabelle; Renaville, Robert ULg; Gengler, Nicolas ULg et al

in 3° Carrefour des Productions Animales (1998)

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See detailAppetency and adhesion: analysis of the kinetcs of contact between concrete and repairing mortars
Courard, Luc ULg; Darimont, Anne ULg

in Katz, Amon; Bentur, Arnon; Alexander, Mark (Eds.) et al Interfacial Zone in Concrete (1998)

The definition of the adhesion itself presents a duality : on the one hand, adhesion is understood to be a process through which two bodies are brought together and attached (bonded) to each other, in ... [more ▼]

The definition of the adhesion itself presents a duality : on the one hand, adhesion is understood to be a process through which two bodies are brought together and attached (bonded) to each other, in such a manner that external force or thermal motion is required to break the bond. The term "adhesion" (or "sticking") is usually applied in this sense in colloid research on coagulation phenomena. On the other hand, we may examine the process of breaking a bond between bodies that are already in contact; and here, as a quantitative measure of the intensity of adhesion, we can take the force or energy required to separate the two bodies. We studied this problem in the context of repairing mortars laid down on a concrete support; we focused our research on the behaviour of a cementitious slurry applied on two types of concrete support, characterised by their surface preparation (sandblasted and polished surface). We measured and observed the penetration of this slurry into the concrete support. [less ▲]

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See detailLa traçabilité des viandes.
Portetelle, Daniel ULg; Renaville, Robert ULg

in 3° Carrefour des Productions Animales (1998)

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See detailObservations coupled to the overpasses of the polar vortex over mid-latitude Europe in winter 1995-1996
Hennen, Olivier; De Mazière, Martine; Van Roozendael, Michel et al

in Harris, N. R. P.; Kilbane-Dawe, I.; Amanatidis, G.T. (Eds.) Polar stratospheric ozone 1997 (1998)

The spring 1996 polar vortex was very deep and cold, with temperatures down to the ice formation threshold, and persisted until March. The northern hemisphere ozone decrease in winter 1995-1996 was larger ... [more ▼]

The spring 1996 polar vortex was very deep and cold, with temperatures down to the ice formation threshold, and persisted until March. The northern hemisphere ozone decrease in winter 1995-1996 was larger than ever before in the nineties. Particularly at the European mid-latitudes, transport of air masses from the polar vortex towards mid-latitudes had a noticeable impact on the stratospheric temperatures and composition. Such was not observed that clearly in the latest winter 1996-1997. In this work, signatures of polar vortex overpasses in spring 1996 at several European mid-latitude stations are indicated. Most significant events have been observed at these stations with a delay of one to four days, on the following days: 18-22/1, 14-20/2, 1-6/3, 29/3, 15-17/4. The focus here will be on the two events in March. [less ▲]

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See detailEmpreintes génétiques et certification en production bovine.
Mortiaux, Frédéric; Renaville, Robert ULg; Peelman, Luc et al

in 3° Carrefour des Productions Animales (1998)

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See detailDevelopment of an in vitro culture method of very immature embryos to assist wide interspecific hybridisation in Phaseolus.
Geerts, P.; Baudoin, Jean-Pierre ULg; Mergeai, Guy ULg

in 3rd European conference on grain legumes : Opportunities for high quality, healthy and added-value crops to meet European demands, 14-19 November 1998, Valladolid, Spain (1998)

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See detailAdaptive intensity matching filters: a new tool for multi-resolution data fusion
de Béthune, Stanislas; Muller, Fabrice; Binard, Marc ULg

in AGARD conference proceedings 595 (1998)

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See detailFinancing sources for village agents of the rice channel in the Mekong Region
Dogot, Thomas ULg; Lebailly, Philippe ULg

in BADC; Vietnam Women's Union (Eds.) Proceedings of the Workshop "Projects with a credit component in South-East Asia" (1998)

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See detailGalanin modulates GH secretion in prepubertal male lambs.
Saleri, Roberta; Baratta, Mario; Renaville, Robert ULg et al

in IV European Congress of Endocrinology (1998)

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See detailImpact of different environmental managements on spatial distribution of ventilation in COPD horses
Vandenput, Sandrina ULg; Rollin, Frédéric ULg; Votion, Dominique ULg et al

in Plügers Archives European Journal of Physiology (1998)

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See detailIGF-I and their binding proteins in growing horses
Gerin, Daniele; Messina, Maria; Renaville, Robert ULg et al

in 3° Internat. Conf. farm Anim. Endocrinol. (1998)

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See detailEvolution de l'agriculture wallonne au cours des vingt dernières années
Burny, Philippe ULg

in Association belge d'Economie Rurale (Ed.) Deuxième workshop pour économistes agricoles (1998)

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See detailHypergraph formalism for urban form specification
Teller, Jacques ULg; Dupagne, Albert ULg

in Proc. of COST Urban Civil Engineering - Action C4 Final Conference (1998)

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See detailDeveloppement d'une méthodologie destinée à mesurer les réactions de peur chez le cheval. Application à l'étude de l'influence de différents facteurs.
Vierin, M.; Bouissou, M. F.; Vandenheede, Marc ULg et al

in Compte rendu de la 24ème Journée de la Recherche Equine (1998)

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See detailSingle-strand conformation polymorphisms detected in lactoprotein genes from Algarvia goat breed. Association with quantitative traits.
Barracosa, Helena; Rodrigues, C. J.; Gomes, M. et al

in IV Iberian Congress on Biotechnology (1998)

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See detailHomologous radioimmunoassay for bovine insulin-like growth factor-binding protein-2 (IGFBP-2).
Vleurick, Lieve; Portetelle, Daniel ULg; Massart, Serge et al

in 3° Internat. Conf. farm Anim. Endocrinol. (1998)

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See detailUncertainties in spatial decision, a policy-maker point of view
Brunet, Sébastien ULg; Cornélis, Bernard

in Proceedings of the International Symposium on Spatial Data Quality (ISSDQ) (1998)

While public decisions concern the society or some collectivities, they are formalised by the policy-makers. Policy-makers face wide-spread types of information, each one of them having their own ... [more ▼]

While public decisions concern the society or some collectivities, they are formalised by the policy-makers. Policy-makers face wide-spread types of information, each one of them having their own uncertainties associated with. The particularity of public decision-makers is to deal with those uncertainties. On the contrary, scientists limit the uncertainties in their experiments by enunciating hypotheses. In any decisional process, decision taking is based on a decision analysis phase which relies on a documentation/information phase. It is then followed by the implementation and the evaluation phases. The foundation of the documentation/information step is composed by three interconnected aspects: data, issue and context. Decision being the act of making up one’s mind can be linked to space or influenced by space or not at all related to space. Public decisions are all spatially referenced if not spatially induced since they apply to a certain territory. The territorial scale of application of a decision intervene not only in the choice of data and analysis, but also on the way the issue is expressed and on the degree of certainty acceptable for decision-makers at the different steps of the decision process. This contribution approaches the uncertainties not from a data perspective, but from the decision-making process point of view. After defining the concepts of spatial and public decisions, the different types of uncertainties and their consequences are presented using a generic model of decision processes. [less ▲]

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See detailX-Ray Spectroscopy with XMM: A New Powerful Tool to Determine Fundamental Parameters of Early-type Stars
Mewe, R.; Rauw, Grégor ULg; van der Hucht, K. A. et al

(1998)

Not Available

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See detailMise au point du dosage de l'insulin-like growth factor-binding protein-2 bovine (bIGFBP-2) par test immunofonctionnel
Massart, Serge; Renaville, Robert ULg; Parmentier, Isabelle et al

in 3° Carrefour des Productions Animales (1998)

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See detailThe Bureaucracy of Crime : J. G. Ballard’s Cocaine Nights and the Speculative Thriller
Delville, Michel ULg

in Analele Universităţii Oradea, Seria Filologie, Fascicola Limba şi literatura (1998)

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See detailPit-1 polymorphisms and milk production parameters in italian-friesian bulls.
Parmentier, Isabelle; Gengler, Nicolas ULg; Mortiaux, Frédéric et al

in 3° Internat. Conf. farm Anim. Endocrinol. (1998)

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See detailL’éclairage public peut-il favoriser une réappropriation de l’espace urbain par les personnes âgées
Teller, Jacques ULg; Italiano, Patrick ULg

in Yerpes, Joel (Ed.) Actes du colloque La ville des vieux - Recherche sur une cité à humaniser (1998)

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See detailDevelopment of routine dtection tests using PCR for certification
Chandelier, Anne; Cognet, Stephane; Marinho, Véra Lucia et al

in Med. Fac. Landbouw. Univ. Gent, 63/4b, 1998 (1998)

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See detailA photometric method to study the Wolf-Rayet content of compact H II regions in nearby galaxies
Royer, P.; Vreux, Jean-Marie ULg; Manfroid, Jean ULg

in The Magellanic Clouds and Other Dwarf Galaxies (1998)

Not Available

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See detail3D flow and transport groundwater modelling including river interactions
Carabin, Guy; Dassargues, Alain ULg; Brouyère, Serge ULg

in Burganos, V. N.; Karatzas, G. P.; Payatakes, A. C. (Eds.) et al Computational Methods in Water Resources XII, Vol. 1: Computational Methods in Contamination and Remediation of Water Resources (1998)

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See detailOverhead line galloping : Field experience during one event in Belgium on February 13th, 1997
Lilien, Jean-Louis ULg; Erpicum, Michel ULg; Wolfs, M.

in IWAIS '98, International Conference, Reykjavik,June 1998, Proceedings (1998)

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See detailVisualizing dynamic power system scenarios for data mining
Geurts, Pierre ULg; Wehenkel, Louis ULg

in Proceedings of LESCOPE 98, Large Engineering Syst. Conf. on Power Engineering (1998)

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See detailEconomy studies of steel building frames with semi-rigid joints
Weynand, K.; Jaspart, Jean-Pierre ULg; Steenhuis, M.

in Proceedings of the Second World Conference on Constructional Steel Design (1998)

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See detailInfluence des régulations situées à l'interface du métabolisme et de la reproduction sur la folliculogenèse et la reprise des cycles en post-partum
Drion, Pierre ULg; Houtain, J. Y.; Drame, El Hadji Daour et al

(1998)

Le déroulement harmonieux de la sexualité de la femelle repose sur l'intégrité anatomique, histologique, biochimique et hormonale des structures ovariennes, hypothalamiques, hypophysaires et utérines ... [more ▼]

Le déroulement harmonieux de la sexualité de la femelle repose sur l'intégrité anatomique, histologique, biochimique et hormonale des structures ovariennes, hypothalamiques, hypophysaires et utérines impliquées, ainsi que sur le subtil dosage des différentes hormones et facteurs protéiques intervenant dans les régulations. La compréhension des mécanismes régulateurs - endocrines, autocrines et paracrines (voir cadre ci-dessous)- qui permettent l'alternance des phases de croissance folliculaire et lutéale constitue un prérequis indispensable à la maîtrise de la cyclicité de la femelle, à la gestion optimale d'un cheptel et plus particulièrement à l'optimisation du capital génétique qu'il représente pour l'éleveur. La présente synthèse vise à faire le point sur les connaissances actuelles relatives aux aspects morphologiques et aux mécanismes régulateurs de la formation des ovaires, de la folliculogenèse et de l'endocrinologie de l'activité ovarienne. [less ▲]

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See detailPARM : a project method based on reciprocal animations and multimedias
Jans, Véronique; Leclercq, Dieudonné ULg; Denis, Brigitte ULg et al

in Van Merrienboer, J. (Ed.) Instructional design for problem-based learning, Proceedings of the Third Workshop of the EARLI SIG Instructional Design, Maastricht, 26-27 juin 1998 (1998)

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See detailLEARN-NETT : une expérience d'apprentissage collaboratif à distance
Charlier, Bernadette; Daele, Amaury; Docq, Françoise et al

in Le point sur la recherche en éducation en Communauté française : actes du 1er congrès des chercheurs en éducation, Bruxelles, 24-25 mai 2000 (1998)

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See detailApplication of groundwater models in karstic aquifers
Dassargues, Alain ULg

in Leibundgut, Christian; Gunn, John; Dassargues, Alain (Eds.) Karst Hydrology (Proc. of Rabat Workshop W2) (1998)

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See detailArt Cox Monopoly Game
Noels-Grötsch, Arlette ULg; Guzik, Joyce A

in Bradley, Paul A.; Guzik, Joyce A. (Eds.) A Half Century of Stellar Pulsation Interpretation: A Tribute to Arthur N. Cox: Proceedings of a Conference held in Los Alamos, NM 16-20 June 1997 (1998)

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See detailVariatio", coordination et isofonctionnalité : l'exemple de Tacite
Longrée, Dominique ULg

in Garcia-Hernandez, Benjamin (Ed.) Estudios de Linguistica Latina, Actas del IX Coloquio Internacional de Linguistica Latina, Universidad Autonoma de Madrid, 14-18 de abril de 1997 (1998)

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See detailCompensation schemes for transient stability assessment and control
Ernst, Damien ULg; Bettiol, Arlon; Zhang, Yiwei et al

in Proceedings of LESCOPE 98 (1998)

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See detailConcilier droit coutumier et amenagement/conservation modernes. L'approche par les maitrises foncieres coutumieres.
Vermeulen, Cédric ULg

in Programme de recherche appliquee "Mise en place de ForetsCommunautaires en peripherie nord de la Reserve de Faune du Dja".Presentation des activites du programme a la Direction des Forets.Reunion interne du 9 avril 1998 (1998)

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See detailLe secret de l'information et de l'instruction - Le principe et l'exception des communications à la presse
Jacobs, Ann ULg

in La loi du 12 mars 1998 réformant la procédure pénale (1998)

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See detailGravitational lens studies with a LMT
Surdej, Jean ULg; Claeskens, Jean-François ULg

in Ferrari, M. (Ed.) Proceedings of the International workshop “Science with Liquid Mirror Telescopes” (1998)

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See detailReal-time transient stability emergency control of the South-Southeast Brazilian system
Ernst, Damien ULg; Bettiol, Arlan; Zhang, Yiwei et al

in Proceedings of SEPOPE 1998 (1998)

A method is proposed for during transients emergency control which predicts the evolution of a system undergoing a major disturbance and, if loss of synchronism is anticipated decides control actions able ... [more ▼]

A method is proposed for during transients emergency control which predicts the evolution of a system undergoing a major disturbance and, if loss of synchronism is anticipated decides control actions able to contain it. The method emanates from SIME, a hybrid time-domain direct method originally designed for realtime preventive transient stability assessment and control. The devised “emergency SIME” has similar interesting features, namely, robustness, accuracy, speed - and also predictive capabilities. Besides, the emergency approach has some intrinsic advantages over the “preventive” approach, namely, it is free from modelling and/or parameter uncertainties (since it relies on real-time measurements rather than time-domain simulations), and it encounters the real stability problem (operating point and contingency scenario rather than base case solutions and list of plausible contingencies). The method is general with respect to power system configurations, types of generation and of controls. In this paper a generation shedding scheme is worked out and applied to the real-time monitoring of the Itaipu-Foz do Igua¸cu corridor. It is shown that it can advantageously complement the existing automatic emergency control scheme. [less ▲]

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See detailLa prescription en matière pénale
Jacobs, Ann ULg

in La prescription (1998)

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See detailApports des mesures métacognitives lors d'un test de compréhension d'un article scientifique
Gilles, Jean-Luc ULg

in Depover, Christian (Ed.) Approches plurielles de l'évaluation des processus cognitifs (1998)

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