References of "Scientific congresses and symposiums"
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See detailSubaerial exposure recording on a Paleocene carbonate platform – Example of the Campo section, Spain
Da Silva, Anne-Christine ULg; Loisy, Corinne; Toullec, Renaud et al

Conference (2006)

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See detailInter-modal freight terminal location in Europe: a strategic model
Limbourg, Sabine ULg

Conference (2006)

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the (partial) possible solutions, but its ... [more ▼]

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the (partial) possible solutions, but its efficiency strongly depends on the places where the container terminals are located. The number of possible locations on large scale networks such as the European one becomes rapidly too large to be taken as input by exact location methods. That’s why the first goal of this paper is to outline a method that helps to identify the best potential locations out of the thousands of potential nodes. The basic idea is to use the flows of commodities and their geographic spreading as input to determine a set of good potential locations for transfer inter-modal terminals. This set can, in a second step, be used as input for already well known optimal location models in order to identify the optimal locations for container terminals in Europe. The complete methodology is illustrated by means on a case study that concerns multi-modal transport over the whole trans-European networks. [less ▲]

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See detailDevelopment of routine duplex RT-PCR tests for certification of fruit tree multiplication material
Massart, Sébastien ULg; Roussel, S.; Kummert, J. et al

Conference (2006)

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See detailIdentification of groundwater quality trends in a chalky aquifer threatened by intensive agriculture
Batlle-Aguilar, Jordi; Orban, Philippe ULg; Dassargues, Alain ULg et al

in Stauffer, Fr.; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

Diffuse groundwater contamination related to agricultural practices is a worldwide environmental problem, particularly the continuous increase in nitrate concentrations. As a response to this threat, the ... [more ▼]

Diffuse groundwater contamination related to agricultural practices is a worldwide environmental problem, particularly the continuous increase in nitrate concentrations. As a response to this threat, the European Union has adopted directives requiring that Member States take measures to reduce agricultural nitrate sources and stating that a “good” status of groundwater is required for all EU members. In order to achieve the environmental objectives for groundwater, the identification and reversal of any significant upward trend in the pollutant concentrations are required. Conclusions are drawn about the evolution of groundwater contamination by nitrates in the following decades with respect to the EU Water directive prescriptions. Measures have to be urgently taken in order to avoid major degradation of groundwater in 10 to 70 years. However, a good groundwater quality status cannot be expected for the 2015 EU Water Framework Directive (WFD). [less ▲]

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See detailGrowth and carcass performances of Belgian Blue x Nelore and Bradford cattle in Bahia state Brazil
Leroy, Pascal ULg; Leroy, Emile ULg; Cassart, Renaud ULg

in World Congress on Genetics Applied to Livestock Production. Belo Horizonte, Brasil (2006)

Detailed reference viewed: 67 (8 ULg)
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See detailLes fours de potiers mérovingiens découverts à Maastricht
Van Wersch, Line ULg

in Husi, Philippe; Hincker, Vincent (Eds.) actes du colloque international, La céramique du Haut Moyen Âge (Ve-Xe siècles) dans le nord-ouest de l’Europe. Bilan et perspectives dix ans après le colloque d’Outreau (2006)

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See detailStudy of the combined effects of temperature, pH and Aw on the growth rate of Trichoderma asperellum using a response surface methodology
Begoude, B. A. D.; Lahlali, R.; Friel, D. et al

Poster (2006)

Detailed reference viewed: 16 (1 ULg)
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See detailInnovations in software packages in quantitative genetics
Druet, Tom ULg; Ducrocq, V.

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

Detailed reference viewed: 39 (1 ULg)
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See detailMédias dominants et altermondialisme. De l’ouverture à la censure
Geuens, Geoffrey ULg

in Durand, Pascal; Hébert, Pierre; Mollier, Jean-Yves (Eds.) et al La censure de l’imprimé. Belgique, France, Québec et Suisse romande (XIXe et XXe siècles) - Actes du colloque international Censure et Imprimé (Université de Versailles, Saint-Quentin-en-Yvelines, 21-23 mai 2002) (2006)

Les débats médiatiques sur la mondialisation s’articulent autour de deux thèses apparemment antagonistes. Pour les partisans du libéralisme économique et les représentants des milieux d’affaires, il ... [more ▼]

Les débats médiatiques sur la mondialisation s’articulent autour de deux thèses apparemment antagonistes. Pour les partisans du libéralisme économique et les représentants des milieux d’affaires, il s’agit de condamner l’interventionnisme et le dirigisme politique dans le libre-jeu de l’économie de marché. Les chefs de file syndicaux et dirigeants réformistes de l’« altermondialisme », entendent, quant à eux, défendre, bec et ongles, l’idée d’un personnel politique victime de la bourse et des pressions de divers lobbies industriels et financiers. Dans les deux cas pourtant, on procède à une dissociation artificielle et trompeuse de l’économique et du politique. Cette représentation dominante de la mondialisation est à l’origine d’une censure, celle qui, derrière le paravent de l’Etat « victime » ou « bourreau » des marchés, refuse la parole aux critiques dénonçant les liens organiques entre pouvoirs économique, politique et médiatique. [less ▲]

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See detailCompletion of biological networks: the output kernel trees approach
Geurts, Pierre ULg; Touleimat, Nizar; Dutreix, Marie et al

in Proceedings of the the Workshop on Probabilistic Modeling and Machine Learning in Structural and Systems Biology (2006)

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See detailSimultaneous use of hydrogeological and geophysical data for groundwater protection zone delineation by co-conditional stochastic simulations
Rentier, Céline; Dassargues, Alain ULg

in Stauffer, Fritz; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

Delineation of protection zones is performed by the use of stochastic simulations integrating all available data. In practice, due to the few available measurements of the main parameters, it can be very ... [more ▼]

Delineation of protection zones is performed by the use of stochastic simulations integrating all available data. In practice, due to the few available measurements of the main parameters, it can be very useful to integrate other data to reduce the uncertainty of the results. Most of the solute spreading is governed by the hydraulic conductivity (K) spatial variability at different scales. A stochastic approach adding measured piezometric heads and electrical resistivity data is presented. Results are discussed on a synthetic and on a practical case. Delineating the ‘Capture zone Probability Distribution’ (CaPD) for a given time, it is shown how the uncertainty can be reduced. The methodology can be used in real applications when little or no information is available about the hydraulic properties, through the conditioning on other data sets. [less ▲]

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See detailCharacterisation of fissured aquifers in the semi-arid region of the mid-Atlas plateau (Oulmès, Morocco)
Orban, Philippe ULg; Ruthy, Ingrid ULg; Elbatloussi, D. et al

in GIRE3D: International Congress on Integrated Water Resources management and Challenges of the Sustainable Development (2006)

The Oulmès plateau (mid-Atlas in Morocco) is known for its groundwater resources in this semi-arid region. In the studied zone (approximately 80 km2), the mineral water of ‘Sidi Ali’ is exploited as well ... [more ▼]

The Oulmès plateau (mid-Atlas in Morocco) is known for its groundwater resources in this semi-arid region. In the studied zone (approximately 80 km2), the mineral water of ‘Sidi Ali’ is exploited as well as the naturally semi-sparkling ‘mineral water of Oulmès’ which are main mineral waters marketed in Morocco. Their sources are located at less than four kilometers from each other. In the same time, the drinking water supply to the local rural populations is far from being sufficient, and even in some places non-existent. In addition the plateau is also the place where many fruit-bearing cultures have been undertaken for a few years. Irrigation and the use of pesticide and herbicide compounds as well as fertilizers could constitute threats for the groundwater quantity and quality and unpleasant consequences are expected for all dependent groundwater end-users. Thus, in this semi-arid zone, an acute problem of sustainable development arises in terms of groundwater quantity and quality. An extended study has involved data collection, measurement campaigns (piezometric levels, sampling & analysis of groundwater), shallow geophysical prospecting, pumping tests, building of a data base, estimation of the recharge spatial distribution and hydrogeological mapping. On the basis of this study, a better understanding is possible about the state and the particular hydrodynamic behaviour of groundwater in the fissured hard-rocks of this plateau. Results are expressed in maps providing explicit and useful information allowing future decisions which can be taken for the welfare of everyone and particularly for the local populations. [less ▲]

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See detailClassification of groundwater samples in wetlands using selforganizing maps
Peeters, Luk; Dassargues, Alain ULg

in Stauffer, Fr; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

Groundwater chemistry in groundwater-fed wetlands often is the result of mixing of discharging groundwater and rainfall in combination with chemical reactions altering the chemical composition, mostly due ... [more ▼]

Groundwater chemistry in groundwater-fed wetlands often is the result of mixing of discharging groundwater and rainfall in combination with chemical reactions altering the chemical composition, mostly due to changes in redox conditions. In this study, a Self-Organizing Map is used to classify chemical groundwater samples of three groundwaterfed wetlands in Belgium in order to identify the origin of groundwater and to deduce redox conditions in the wetlands. The Self-Organizing Map (SOM) algorithm is an unsupervised neural network technique to represent a multidimensional dataset on a two-dimensional grid in a topology-preserving way, allowing investigation of non-linear, complex relationships between variables and grouping of the data (Kohonen, 1995). The SOM is trained with data from a regional groundwater monitoring network and rainfall data. The resulting SOM is able to distinguish between samples of different origin or redox conditions within the regional aquifers. Subsequently, samples of the three wetlands are shown to the SOM and each sample is classified as having a chemical composition comparable to rainfall or to one of the regional aquifers. [less ▲]

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See detailFinite element modelling of electrostatic MEMS including the impact of fringing field effects on forces
Boutaayamou, Mohamed ULg; Nair, Harish; V Sabariego, Ruth ULg et al

in Proceedings of the 7th International Conference on Thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-Systems (EuroSimE2006) (2006)

The numerical models describing the behaviour of electrostatically actuated microsystems often disregard fringing fields. However, taking the fringing fields into account is crucial for an accurate ... [more ▼]

The numerical models describing the behaviour of electrostatically actuated microsystems often disregard fringing fields. However, taking the fringing fields into account is crucial for an accurate computation of the electrostatic forces. In this work, the finite element method is applied for modeling electrostatic actuators. The electrostatic force distribution is obtained by locally applying the virtual work method. A micro-beam and a comb drive are considered as test cases. The impact of the fringing field effects on the accuracy of electrostatic forces is shown through 2D and 3D parametric studies. [less ▲]

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See detailApplications of security-constrained optimal power flows
Capitanescu, Florin ULg; Glavic, Mevludin; Ernst, Damien ULg et al

in In Proceedings of Modern Electric Power Systems Symposium, MEPS06 (2006)

This paper proposes to formulate security control as a sequential decision making problem and presents new developments in automatic learning of sequential decision making strategies from simulations and ... [more ▼]

This paper proposes to formulate security control as a sequential decision making problem and presents new developments in automatic learning of sequential decision making strategies from simulations and/or information collected from real-life system measurements. The exploitation of these methods for the design of decision making strategies and control policies in the context of preventive and emergency mode dynamic security assessment and control is discussed and further opportunities for research in this area are highlighted. [less ▲]

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See detailContribution des agricultrices au développement rural et à une agriculture durable
Turlot, Amélie; Duquesne, Brigitte ULg

Conference (2006)

Detailed reference viewed: 15 (5 ULg)
See detailTerritorial information, themes, indicators and sources
Devillet, Guénaël ULg; Chen, D.

in Acts of International Conference of Territorial Intelligence (2006)

Detailed reference viewed: 5 (0 ULg)
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See detailThe grammaticalization of small size nouns
Brems, Lieselotte ULg

Conference (2006)

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See detailClinical data based optimal STI strategies for HIV: a reinforcement learning approach
Ernst, Damien ULg; Stan, Guy-Bart; Gonçalves, Jorge et al

in Proceedings of the 45th IEEE Conference on Decision and Control (CDC 2006) (2006)

This paper addresses the problem of computing optimal structured treatment interruption strategies for HIV infected patients. We show that reinforcement learning may be useful to extract such strategies ... [more ▼]

This paper addresses the problem of computing optimal structured treatment interruption strategies for HIV infected patients. We show that reinforcement learning may be useful to extract such strategies directly from clinical data, without the need of an accurate mathematical model of HIV infection dynamics. To support our claims, we report simulation results obtained by running a recently proposed batch-mode reinforcement learning algorithm, known as fitted Q iteration, on numerically generated data. [less ▲]

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See detailCorrelation of Experimental and Numerical Results on Electrostatically Actuated Micro-Beams
Rochus, Véronique ULg; Rixen, Daniel; Golinval, Jean-Claude ULg

in Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show (2006), 3

The aim of this paper is to validate numerical simula- tions of electromechanical coupling in micro-structures using some experimental results. The micro-structures studied here consist in a micro-bridge ... [more ▼]

The aim of this paper is to validate numerical simula- tions of electromechanical coupling in micro-structures using some experimental results. The micro-structures studied here consist in a micro-bridge and two cantilever micro-beams. Multi-physics models of micro-electro- mechanical systems (MEMS) based on the ¯nite ele- ment method (FEM) are used to model the strongly coupled electro-mechanical interactions and to perform static analyses taking into account large displacements. In all the cases treated here the numerical results are in very good agreement with the experimental results. [less ▲]

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See detailMolecular characterization of tunisian variants of Peach Latent Mosaic viroid (PLMVD).
Fekih Hassen, I.; Massart, Sébastien ULg; Roussel, S. et al

Conference (2006)

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See detailOK3: Méthode d’arbres à sortie noyau pour la prédiction de sorties structurées et l’apprentissage de noyau
Geurts, Pierre ULg; Wehenkel, Louis ULg; d'Alché-Buc, Florence

in Proc. of CAP (Conférence francophone d'apprentissage) (2006)

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See detailVirtual networks under attack: disrupting internet coordinate systems
Kaafar, M. A.; Mathy, Laurent ULg; Turletti, T. et al

in Proceedings of the 2006 ACM CoNEXT conference (2006)

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See detailEnsembles of extremely randomized trees and some generic applications
Wehenkel, Louis ULg; Ernst, Damien ULg; Geurts, Pierre ULg

in Proceedings of Robust Methods for Power System State Estimation and Load Forecasting (2006)

In this paper we present a new tree-based ensemble method called “Extra-Trees”. This algorithm averages predictions of trees obtained by partitioning the inputspace with randomly generated splits, leading ... [more ▼]

In this paper we present a new tree-based ensemble method called “Extra-Trees”. This algorithm averages predictions of trees obtained by partitioning the inputspace with randomly generated splits, leading to significant improvements of precision, and various algorithmic advantages, in particular reduced computational complexity and scalability. We also discuss two generic applications of this algorithm, namely for time-series classification and for the automatic inference of near-optimal sequential decision policies from experimental data. [less ▲]

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See detailÀ la recherche de l'œuvre perdue d'Héliodore
Marganne, Marie-Hélène ULg

in Boudon Millot, Véronique; Garzya, Antonio; Jouanna, Jacques (Eds.) et al Ecdotica e ricezione dei testi medici greci. Atti del V Convegno internazionale, Napoli, 1-2 ottobre 2004 (2006)

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See detailCarbon dioxide in European coastal waters
Borges, Alberto ULg; Schiettecatte, L.-S.; Abril, G. et al

Poster (2006)

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See detailReinforcement learning with raw image pixels as input state
Ernst, Damien ULg; Marée, Raphaël ULg; Wehenkel, Louis ULg

in Advances in machine vision, image processing & pattern analysis (Lecture notes in computer science, Vol. 4153) (2006)

We report in this paper some positive simulation results obtained when image pixels are directly used as input state of a reinforcement learning algorithm. The reinforcement learning algorithm chosen to ... [more ▼]

We report in this paper some positive simulation results obtained when image pixels are directly used as input state of a reinforcement learning algorithm. The reinforcement learning algorithm chosen to carry out the simulation is a batch-mode algorithm known as fitted Q iteration. [less ▲]

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See detailGenomic structure of new Peach Mosaic viroid variants in Tunisia
Fekih Hassen, I.; Massart, Sébastien ULg; Kummert, J. et al

Poster (2006)

Detailed reference viewed: 7 (1 ULg)
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See detailEpaule : exploration isocinétique de contextes pathologiques variés. Implications thérapeutiques
Forthomme, Bénédicte ULg; Binet, J.; Heymans, Olivier et al

in Abstract Book des 8èmes Rencontres de Médimex (2006)

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See detailInteraction of global and local buckling of compression members with welded box cross section
Kuhlmann, U.; Degée, Hervé ULg; Detzel, A.

in Camotim, D. (Ed.) Proceedings of the SDSS Conference (STABILITY AND DUCTILITY OF STEEL STRUCTURES) (2006)

This paper summarises a research project that analysed aspects of stability failure of thin-walled compression members that are likely to exhibit combined global and local buckling. In particular the ... [more ▼]

This paper summarises a research project that analysed aspects of stability failure of thin-walled compression members that are likely to exhibit combined global and local buckling. In particular the influence of various imperfections on the load-carrying capacity, namely welding residual stresses and local as well as global geometrical defects was subject of detailed experimental and numerical investigations. The insight into the structural behaviour has led in the case of thin-walled box sections to a proposal for a modification of the non-dimensional slenderness value used in the buckling verification and to the recommendation of a shift of the applied European buckling curve to a more favourable one. [less ▲]

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See detailVoice over application-level multicast
Blundell, N.; Egi, N.; Mathy, Laurent ULg

in Performance, Computing, and Communications Conference, 2006. IPCCC 2006. 25th IEEE International (2006)

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See detailRelevance of soil mapping criteria to predict geochemical background of trace elements in soils from local to regional scales.
Colinet, Gilles ULg; Bogaert, Patrick; Bock, Laurent ULg

Poster (2006)

Among natural factors driving the soil content in metallic trace elements (MTE), the geochemical background is often deemed as a sound base for the detection of contaminations. Numerous studies have shown ... [more ▼]

Among natural factors driving the soil content in metallic trace elements (MTE), the geochemical background is often deemed as a sound base for the detection of contaminations. Numerous studies have shown the difficulties to take into account the multi-dimensionnality of the spatial variability of most soil properties. As far as a detailed soil map is available for Belgium, the relevance of its information was investigated at various spatial scales in the Walloon Region (Southern Belgium), from the plot to the entire region, to evaluate the feasibility of a multi-scale mapping of geochemical background. A database of soil profiles (gathering both agricultural and forest soils) was used to analyse the relationships between the MTE total content (measured after HF-HClO4-HCl dissolution) and other general characteristics such as pH, Total Organic Carbon content (TOC), Particle Size Distribution (PSD), and cationic exchange capacity (CEC). The factors of MTE spatial distribution inside and between solums were investigated through multivariate statistical analysis. The spatial dependence of these factors was then studied over plot, field, farm, county and region scales, and compared to the spatial structures of the soil map parameters. At the solum level, strong relationships between most of the studied MTE were found, as well as between stone charge and fine earth contents. The PSD is the main driving factor of MTE content in non-carbonated soils, whatever the land use. When considering soil associations, such as catenas, the slope redistribution processes must be taken into account. However, the PSD remains the main driving factors and, as the soil map contains information about that property (mainly the textural class and the profile development), a cartography of the geochemical background based on the use of the soil map and pedotransfer functions or regression models appears relevant. At the regional scale, some long-range spatial structures could be identified. These result mainly from the geological structure of the Walloon region, where the lithological zonation is rather clearly marked. The soil map (texture and nature of stone charge) appears relevant at that scale too but does need a generalization process and fails however to differenciate the intra-type soil spatial variability. Some basic processes of integration of point measurements and qualitative information have been explored. They should be further investigated in the future. [less ▲]

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See detailIn situ study of cotton dyed fibres by Raman spectroscopy
Lepot, Laurent ULg

Conference (2006)

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See detailModelling flood events using high resolution digital elevation models and considering the sediment interaction with constructions in floodplains
Archambeau, Pierre ULg; Erpicum, Sébastien ULg; Dewals, Benjamin ULg et al

in Proceedings of the 7th International Conference on Hydroinformatics (2006)

The main objective of the present paper is a description of two effective numerical 2D models to be used as strategic tools in the process of flood risks assessment and mitigation. The first one is a ... [more ▼]

The main objective of the present paper is a description of two effective numerical 2D models to be used as strategic tools in the process of flood risks assessment and mitigation. The first one is a model for hydrodynamics simplified according to the diffusive assumption while the second one is a complete model based on the shallow water equations. Each of them is solved with an efficient numerical technique (including implicit time integration schemes and GMRES linear solvers) maximizing the convergence rate towards a steady state. A practical case study, for which a high resolution Digital Elevation Model exists, will be presented. The study shows the consequences on structures of a new construction in the floodplain in terms of inundation and erosion. [less ▲]

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See detailContributions possibles des innovations genetiques pour l'amelioration de la competitivite des filieres cotonnieres africaines.
Mergeai, Guy ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2006), 10(4), 345-350

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See detailSensitivity analysis of programmed cell death and implications for crosstalk phenomena during tumor necrosis factor stimulation
Eissing, Thomas; Waldherr, Steffen; Gondro, Cedric et al

in Proc. of the 2006 IEEE Conference on Control Applications (2006)

Different methods for analyzing the sensitivity of the direct signal transduction pathway of receptor-induced apoptosis to parameter changes are presented. Apoptosis is a form of programmed cell death ... [more ▼]

Different methods for analyzing the sensitivity of the direct signal transduction pathway of receptor-induced apoptosis to parameter changes are presented. Apoptosis is a form of programmed cell death, removing unwanted cells within multicellular organisms to maintain a proper balance between cell reproduction and death. The results indicate the importance of controlling activated caspases by direct inhibition to prevent apoptosis. A misregulation of IAP molecules, one of the main inhibitors, appears to be especially critical. The results indicate how an increased production of this molecule promotes survival and might promote cancer progression, while a reduced degradation might not, thereby providing insight of potential pharmaceutical relevance and also stimulating experimental verification. The different engineering methods applied, nicely complement each other to provide valuable insight into this important process. Because IAPs, among others, are also an important connection to other signaling pathways, the results will enable a more efficient extension of the current model. This is outlined at the example of tumor necrosis factor induced signaling pathways [less ▲]

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See detail1D and 2D solvers coupling for free surface flow modelling
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the 7th International Conference on Hydroinformatics (2006)

In the field of hydraulic engineering, the size of the simulations is one of the current challenges to model with precision the large areas involved by practical engineers applications. In this scope, the ... [more ▼]

In the field of hydraulic engineering, the size of the simulations is one of the current challenges to model with precision the large areas involved by practical engineers applications. In this scope, the linking in the same modelization of different solvers, each one used in the part of the simulation where its fundamental characteristics are most suitable, open the door to still unreached modelling possibilities. WOLF software includes a series of numerical tools for simulating a wide range of free surface flows and transport phenomena. This paper presents the coupling of the 1D and 2D multiblock finite volume models of WOLF to simulate in a unified way large river reaches (in 1D) with a very fine computation of local areas (in 2D). An application to the simulation of the propagation of the waves following the filling and emptying operations of a large locks system on a several kilometres long reach of the river Meuse (Belgium) is presented. [less ▲]

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See detailCoupled modelling of an excavation in a brittle formation
Collin, Frédéric ULg; Li, Xian Ling; Chambon, René et al

Conference (2006)

This paper is concerned with the coupling effects existing between the mechanical problem and the water diffusion process during an excavation, in relation with the nuclear waste disposal concepts. The ... [more ▼]

This paper is concerned with the coupling effects existing between the mechanical problem and the water diffusion process during an excavation, in relation with the nuclear waste disposal concepts. The hydromechanical coupling effects are first evidenced. Then, the permeability variation with damage is studied. Finally, different kind of flow boundary condition are considered. Their influence on the cavity convergence is highlighted and their effect on strain localisation process as well. [less ▲]

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See detailEVALUATION OF NOVEL SYNTHETIC POLYCATION ACTION ON VISCOELASTIC PROPERTIES OF ERYTHROCYTE MEMBRANE
Riquelme, B; Foresto, P; Relancio, F et al

in Annales AFA (2006)

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See detailKilling Kinetics of Group B Streptococci for Penicillin in Combination with Gentamicin
Melin, Pierrette ULg; Lorquet, Sophie ULg; Hayette, Marie-Pierre ULg et al

in Sriprakash, Kabada S (Ed.) "Streptococci: New Insights into an Old Enemy", Proceedings of the XVI Lancefield International Symposium on Streptococci and Streptococcal Diseases (2006)

In vitro synergism and killing kinetics studies of penicillin in combination with gentamicin were performed with group B streptococci recently isolated in Belgium. The expected accelerated killing was not ... [more ▼]

In vitro synergism and killing kinetics studies of penicillin in combination with gentamicin were performed with group B streptococci recently isolated in Belgium. The expected accelerated killing was not observed when compared with penicillin alone. D 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailAdvantages of using dissipative connections in the diagonals of high rise concentric braced frames
Doneux, C. L.; Plumier, André ULg; Degée, Hervé ULg

in Mazzolani; Wada (Eds.) Proceedings of the STESSA Conference (2006)

The paper presents a quantitative comparison of two seismic design of a concentric braced frame of 15 storey height for a 0.4 g PGA: one classical design in which connections of diagonals are capacity ... [more ▼]

The paper presents a quantitative comparison of two seismic design of a concentric braced frame of 15 storey height for a 0.4 g PGA: one classical design in which connections of diagonals are capacity designed to the diagonal sections and one innovative design introducing dissipative connections at the ends of the diagonals. The structures are first designed by equivalent static design. Pushover analysis and non linear dynamic analyses are then performed to compare the real behavior and performance of the structures. The advantages of using dissipative connections are confirmed in a high rise flexible building. [less ▲]

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See detailFlexural response of heterogeneous structures using computational homogenisation
Mercatoris, Benoît ULg; Massart, Thierry J.

in 8th International Conference on Computational Structures Technology (CST2006) (2006)

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See detailStochastic analysis of the effect of spatial variability of diffusion parameters on radionuclide transport in low permeability clay layer
Huysmans, Marijke; Dassargues, Alain ULg

in Calibration and Reliability in Groundwater Modelling: From Uncertainty to Decision Making (2006)

Most studies that incorporate subsurface heterogeneity in groundwater flow and transport models only analyze and simulate the spatial variability of hydraulic conductivity. Heterogeneity of the other flow ... [more ▼]

Most studies that incorporate subsurface heterogeneity in groundwater flow and transport models only analyze and simulate the spatial variability of hydraulic conductivity. Heterogeneity of the other flow and transport parameters is usually neglected. This approach is often justified, but there are however cases in which disregarding the heterogeneity of the other flow and transport parameters can be questionable. In low permeability media, for instance, diffusion is often the dominant transport mechanism. It therefore seems logical to incorporate the spatial variability of the diffusion parameters in the transport model. This study therefore analyzes and simulates the spatial variability of the effective diffusion coefficient and the diffusion accessible porosity with geostatistical techniques and incorporates their heterogeneity in the transport model of a low permeability formation. The calculated output radionuclide fluxes of this model are compared with the fluxes calculated with a homogeneous model and a model with a heterogeneous hydraulic conductivity distribution. This analysis shows that the heterogeneity of the diffusion parameters has a much larger effect on the calculated output radionuclide fluxes than the heterogeneity of hydraulic conductivity. [less ▲]

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See detailImpact of Mycosphaerella fijiensis toxins on banana antioxidant systems.
Busogoro, J. P.; Olivier, T.; Leiva, M. et al

Poster (2006)

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See detailPlasminogen activator inhibitor type 1 (PAI-1) controls bone marrow-dependent and independent vascularization
Jost, M; Maillard, C; Lecomte, J et al

Poster (2006)

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See detailEvaluation of the load bearing capacity of thin-walled steel members for long span composite floors
Rossi, Barbara ULg; Jaspart, Jean-Pierre ULg

in International Colloquium on Stability and Ductility of Steel Structures : SDSS2006, Lisbon 6-8 September 2006 (2006)

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See detailMathematical modeling of bone regeneration including the angiogenic process
Geris, Liesbet ULg; Vander Sloten, Jos; Van Oosterwyck, Hans

in Journal of Biomechanics (2006), 39(S1), 411-412

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See detailOutils pour gérer l'hétérogénéité des élèves au cours de langues étrangères : synthèse critique d'une recherche-action menée avec de jeunes enseignants.
Beckers, Jacqueline ULg; Simons, Germain ULg

in Actes du 4e Congrès des Chercheurs en Education. La qualité pour tous les élèves : l'école face aux inégalités (2006)

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See detailClinical data based optimal STI strategies for HIV: a reinforcement learning approach
Ernst, Damien ULg; Stan, Guy-Bart; Gonçalves, Jorge et al

in Proceedings of the 15th Annual Machine Learning Conference of Belgium and The Netherlands (Benelearn 2006) (2006)

This paper addresses the problem of computing optimal structured treatment interruption strategies for HIV infected patients. We show that reinforcement learning may be useful to extract such strategies ... [more ▼]

This paper addresses the problem of computing optimal structured treatment interruption strategies for HIV infected patients. We show that reinforcement learning may be useful to extract such strategies directly from clinical data, without the need of an accurate mathematical model of HIV infection dynamics. To support our claims, we report simulation results obtained by running a recently proposed batch-mode reinforcement learning algorithm, known as tted Q iteration, on numerically generated data. [less ▲]

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See detailDamping control by fusion of reinforcement learning and control Lyapunov functions
Glavic, Mevludin; Wehenkel, Louis ULg; Ernst, Damien ULg

in Proceedings of the 38th North American Power Symposium (NAPS 2006) (2006)

The main idea behind the concept, proposed in the paper, is the opportunity to make control systems with increased capabilities by synergetic fusion of the domain-specific knowledge and the methodologies ... [more ▼]

The main idea behind the concept, proposed in the paper, is the opportunity to make control systems with increased capabilities by synergetic fusion of the domain-specific knowledge and the methodologies from control theory and artificial intelligence. The particular approach considered combines Control Lyapunov Functions (CLF), a constructive control technique, an Reinforcement Learning (RL) in attempt to optimize a mix of system stability and performance. Two control schemes are proposed and the capabilities of the resulting controllers are illustrated on a control problem involving a Thyristor Controlled Series Capacitor (TCSC) for damping oscillations in a four-machine power system. [less ▲]

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See detailExplanation of the Tin role in the High Temperature Oxidation Resistance of Bronzes
Mathis, François ULg; Trocellier, Patrick; Aucouturier, Marc

in Welter, Jean - Marie (Ed.) Copper - Better Properties for Innovative product (2006)

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See detailLutte biologique contre les maladies de post-récolte des pommes: Sélection des antagonistes de Penicillium expansum et de Botrytis cinerea
Achbani, E. H.; Mounir, R.; El Jaafari, S. et al

Conference (2006)

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See detailThe lymphatic ring assay: a new in vitro model of lymphangiogenesis
Bruyère, F; Melen, L; Blacher, Silvia ULg et al

Conference (2006)

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See detailAbout automatic learning for advanced sensing, monitoring and control of electric power systems
Wehenkel, Louis ULg; Glavic, Mevludin; Geurts, Pierre ULg et al

in Proceedings of the Second Carnegie Mellon Conference in Electric Power Systems: Monitoring, Sensing, Software and its Valuation for the Changing electric Power Industry (2006)

The paper considers the possible uses of automatic learning for improving power system performance by software methodologies. Automatic learning per se is first reviewed and recent developements of the ... [more ▼]

The paper considers the possible uses of automatic learning for improving power system performance by software methodologies. Automatic learning per se is first reviewed and recent developements of the field are highlighted. Then the authors’ views of its main actual or potential applications related to power system operation and control are described, and in each application present status and needs for further developments are discussed. [less ▲]

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See detailTime series of the partial pressure of carbon dioxide (2001 2004) and preliminary inorganic carbn budget in the Scheldt plume (Belgian coastal waters)
Schiettecatte, L.-S.; Gazeau, F.; van der Zee, C. et al

Poster (2006)

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See detailEvaluation of geochemical determinism of trace elements in forest soils at regional scales. Lessons from the Permanent Forest Condition Survey.
Colinet, Gilles ULg; Baize, Denis; Lacroix, Daniel et al

Conference (2006)

The natural concentration of some elements in soil varies regionally according to lithology and locally with site-specific soil forming conditions such as relief or vegetation characteristics. Knowledge ... [more ▼]

The natural concentration of some elements in soil varies regionally according to lithology and locally with site-specific soil forming conditions such as relief or vegetation characteristics. Knowledge of the natural total concentrations of trace metals is now considered as prerequisite for the detection and assesment of anthropogenic contaminations. The Permanent Forest Inventory is a programme financed by the Ministry of the Walloon Region which aims at assessing and monitoring the forest condition in Southern Belgium. A part of this programme is dedicated to the implementation of a soil quality monitoring network. The observation plots are located at the intersection of a regular grid. Ten percent of the forest plots are planned to be sampled each year, which theorically supposes a time-frequency of 10 years for the monitoring considerations. Up to now, three field campaigns have been completed and 245 soil samples analyzed. Once a plot precisely located on the field, soil is sampled by mixing twenty 20cm-deep cores taken at the perimeter of a 10m large circle. Environmental observations complete the field work. These concern the physical environment, the soil morphology and the vegetation characteristics. The following parameters are measured in the laboratory: total organic carbon, total nitrogen, pHwater, pHKCl, exchangeable acidity and aluminium, cationic exchangeable capacity, NH4Cl-exctractible cations, total, mineral, and exchangeable P, and aqua-regia extractible concentrations of Ca, Mg, K, Al, Fe, Cr, Ni, Mn, Zn, Cu, Pb, Co, and Cd. Statistical analysis were then performed on the results in order to identify the driving factors of the soil properties, especially the geochemical determinism. Relationships between parameters and between parameters and field observations were thus investigated. Then the relevance of some classifications to differenciate the soil properties was evaluated and finally the spatial structure of the parameters was compared to the geographical distribution patterns of lithology, soil associations, or ecological territories. Although some diversity can be found among the soil series in this survey, soils developped from shales and/or sandstones are largely dominant. The first results therefore show a large extreme-based variability and moderate variation coefficients. The exchangeable cations and carbonate–sensitive parameters are the most variable. Frequency distributions are often largely skewed. Exchangeable cations appear to be more closely linked to acidity status than organic content while pseudo-total concentrations show rather good linear relationships between each other, to the exception of Pb and Cd. Both elements seem linked to specific lithologies, the presence of limestone for Pb, some clay-rich parent material or limestone for Cd. Among the soil characteristics, the nature and the abundance of the coarse fragments associated to the fine earth is the most differenciating criteria for pseudo-total content. Finally, there are clear convergences between spatial distributions of most of the elements and lithology or small natural regions. [less ▲]

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See detailStudies on the infectivity and pathogenicity of new Peach Latent Mosaic viroid (PLMVd) variants
Fekih Hassen, I.; Parisi, Olivier ULg; Fakhfakh, H. et al

Poster (2006)

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See detailStudy of the modes of action of two biocontrol agents Z1 and ZH2
Drider, R.; Friel, D.; El Guilli, M. et al

Poster (2006)

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See detailDevelopment of a chemiotherapy protocol to sanitise banana genotypes infected by banana mild mosaic virus (BanMMV)
Busogoro, J. P.; Vandermolen, M.; Masquelier, L. et al

Conference (2006)

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See detailLes nouvelles orientations de l’enseignement de l’histoire à l’école secondaire en Communauté française de Belgique
Jadoulle, Jean-Louis ULg

in B. CAULIER & L. COURTOIS (Ed.) Québec-Wallonie. Dynamique des espaces et expériences francophones (2006)

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See detailStudy of thermal effects in bulk RE-BCO superconductors submitted to a variable magnetic field
Laurent, Philippe; Fagnard, Jean-François ULg; Mathieu, J.-P. et al

in Journal of Physics: Conference Series (2006), 43

When bulk RE-BCO superconductors are used as permanent magnets in engineering applications, they are likely to experience transient variations of the applied magnetic field. The resulting vortex motion ... [more ▼]

When bulk RE-BCO superconductors are used as permanent magnets in engineering applications, they are likely to experience transient variations of the applied magnetic field. The resulting vortex motion may cause a significant temperature increase. As a consequence the initial trapped flux is reduced. In the present work, we first focus on the cause of a temperature increase. The temperature distribution within a superconducting finite cylinder subjected to an alternating magnetic field is theoretically predicted. Results are compared to experimental data obtained by two temperature sensors attached to a bulk YBCO pellet. Second, we consider curative methods for reducing the effect of heat flux on the temperature increase. Hall-probe mappings on YBCO samples maintained out of the thermal equilibrium are performed for two different morphologies : a plain single domain and a single domain with a regularly spaced hole array. The drilled single-domain displays a trapped induction which is weakly affected by the local heating while displaying a high trapped field. [less ▲]

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See detailLa notion de biens
Vanbrabant, Bernard ULg; Lecocq, Pascale ULg; sagaert, vincent

in Leleu, Yves-Henri (Ed.) Rapports belges au XVIIème colloque de l'Académie internationale de droit comparé (2006)

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See detailClostridia and enterotoxaemia
Mainil, Jacques ULg

Conference (2006)

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See detailAnalysis of buildings height computed on a DSM generated from a VHR satellite stereopair
Binard, Marc ULg; Devriendt, D.; Cornet, Yves ULg et al

in Hostert, P.; Damm, A.; Schiefer, S. (Eds.) Proceedings of the First Workshop of the EARSeL Special Interest Group on Urban Remote Sensing "Challenges and Solutions" (2006)

At the final meeting of the SPIDER project, the users wanted to know if it was possible to evaluate the building height or the number of floors, from the DSM obtained from a VHR satellite stereopair ... [more ▼]

At the final meeting of the SPIDER project, the users wanted to know if it was possible to evaluate the building height or the number of floors, from the DSM obtained from a VHR satellite stereopair. Combined with the 2D delineation of the buildings – for example coming from the cadastre register - this information could be useful in urban studies – e.g. population density assessment - or to generate quasi realistic 3D views. In this example, the DSM is extracted from an IKONOS stereopair (DSMsat) on the hilly area of Liège in Belgium. It is used in combination with a 3D vector file. On the one hand, this file is used for the 2D delineation of the buildings. On the other hand, the third dimension provided by this file is also exploited for the assessment of the extracted building height. Moreover LIDAR data are also available over the test area, permitting the creation of a reference DSM (DSMref). * The first step of the process consists in the determination of the ground altitude around the buildings. A procedure was setup in order to compute it and to generate the DTM for the reference and satellite data (DTMref and DTMsat). * The second step consists in the extraction of statistics, for every building (min, max, mean, etc.) as well from the DSMsat and DSMref, as from the DTMsat and DTMref. The analysis shows that the satellite approach globally underestimates the building height of about 4 m. These results are discussed regarding building height versus the area and the heterogeneity of the roof height. [less ▲]

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See detailPerformance analysis of Stealth DHT with mobile nodes
MacQuire, A.; Brampton, A.; Rai, I. A. et al

in Pervasive Computing and Communications Workshops, 2006. PerCom Workshops 2006. Fourth Annual IEEE International Conference on (2006)

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See detailLa céramique, témoin privilégié des aspects sociaux et culturels du site mérovingien de Sclayn
Van Wersch, Line ULg

in Husi, Philippe; Hincker, Vincent (Eds.) Actes colloque international, La céramique du Haut Moyen Âge (Ve-Xe siècles) dans le nord-ouest de l’Europe. Bilan et perspectives dix ans après le colloque d’Outreau (2006)

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See detailLes "burins" de l'atelier de débitage aurignacien de Maisières-Canal (province du Hainaut, Belgique)
Flas, Damien; Miller, Rebecca ULg; Jacobs, Benjamin

in Le Bruns Ricalens, Foni (Ed.) Burins préhistoriques : formes, fonctionnements, fonctions (2006)

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See detailManagement of soils polluted by heavy metals in cultivated areas : which kind of bioremediation ?
Schvartz, Christian; Zu, Yanqun; Douay, Francis et al

Conference (2006)

Within the periurban areas of big cities, soils are often contaminated by heavy metals spread by human activity: atmospheric fallouts due to industry and traffic, recycling of urban wastes (directly or ... [more ▼]

Within the periurban areas of big cities, soils are often contaminated by heavy metals spread by human activity: atmospheric fallouts due to industry and traffic, recycling of urban wastes (directly or after water treatment), fertilizers and pesticides used in agriculture… This is, among others, verified in the surroundings of Kunming (Yunnan, PR China) and Lille (Nord-Pas de Calais, France), areas with high density of population and traditional metallurgical industries. These areas have also intensive agricultural activities characterized by important vegetable productions, and are generally known as the "green belts" of the cities. These cultures, with short vegetative period, need high biodisponibility of nutrients, biodisponibility which may also occur for other unwanted elements existing in the soil, such as heavy metals. For evident human health reasons the quality of the crops must be ensured and their heavy metal content kept as low as possible, at least under the values of relevant legal thresholds. Thus, vegetables are particularly sensitive to the presence of heavy metals in the soils where they are growing. It is therefore necessary to manage these soils in order to preserve public health or, more basically, the income of the farmers, as contaminated vegetables would not be marketable. Thus, for these large areas contaminated by diffuse pollution, bioremediation looks to be appropriate. But the kind of the bioremediation which will be applied has to be adapted to the severity of the soil pollution and to the intended land use. In this project, we have assessed the contents of Pb, Cd, Zn and Cu of soils and vegetables within the Chenggong county (near Kunming), and compared the results to the already known situation of the surroundings of two lead and zinc smelters located close to Lille. Then goals and ways of bioremediation have been discussed and the first steps of implementation experimented. [less ▲]

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See detailOn the use of variable complementarity for feature selection in cancer classification
Meyer, Patrick ULg; Bontempi, Gianluca

in Applications of Evolutionary Computing (2006)

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