References of "Scientific congresses and symposiums"
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See detailHow transcriptomic studies may help to improve the control of bovine diseases : an example with calf pneumonia and endotoxemia
Wallemacq, Hugues ULg; Ramery, Eve ULg; Bureau, Fabrice ULg et al

in Proceedings: XXVth Jubilee World Buiatrics Congress (2008)

Global change in genes expression induced by pathological processes can now be analysed in cattle by new tools called microarrays. These transcriptomic studies may help to better understand the ... [more ▼]

Global change in genes expression induced by pathological processes can now be analysed in cattle by new tools called microarrays. These transcriptomic studies may help to better understand the pathophysiological mechanisms responsible for the disease and may therefore contribute to develop more efficient preventive and curative strategies. An example is given with a model of calf pneumonia and endotoxemia [less ▲]

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See detailCrystal chemistry of natural and synthetic fillowite-type phosphates
Hatert, Frédéric ULg; Keller, Paul; Grew, Ed et al

Conference (2008)

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See detailChronotype-dependent performance modulation according to time of day : a functional neuroimaging approach
Schmidt, Christina ULg; Collette, Fabienne ULg; Sterpenich, Virginie et al

in NeuroImage (2008), 41(Suppl. 1),

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See detailNumerical modelling and theoretical analysis of geometrically-controlled flow instabilities in rectangular basins
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Pirotton, Michel ULg

in Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

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See detailOccurrence of AIP Mutations in Sporidic Pituitary Adenomas and Familial Isolated Pituitary Adenomas Kindreds in Valencia, Spain
Fajardo Montanaña, C.; Daly, Adrian ULg; Tichomirowa, M. A. et al

in ENDO 2008: 90th Annual Meeting of the Endocrine Society - Abstract book (2008)

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See detailThe spatial dimension of species diversity: where phytogeography, landscape ecology and conservation meet.
Bogaert, Jan ULg; Koffi, K J; Sibomana, S et al

in IUFRO Landscape Ecology Conference (2008)

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See detailSox10 is not necessary for auditory neurons survival
Breuskin, I; Bodson, M; Thelen, Nicolas ULg et al

Poster (2008)

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See detailProduction of alarm pheromone by developing aphids varies in response to their social environment
Verheggen, François ULg; Mescher, Mark; Haubruge, Eric ULg et al

Conference (2008)

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to ... [more ▼]

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to cease feeding, drop from their host plant, and disperse. Because aphid alarm pheromone confers apparent fitness benefits on recipients while its production and release likely entail costs for the emitting aphid, it could be adaptive for aphids to regulate their Eβf production in response to variation in the social environment. To explore this possibility we compared the production of Eβf by Acyrthosiphon pisum (Harris) individuals reared from first-instar larvae to the adult stage in isolation to that of individuals reared among conspecifics or among individuals of a different aphid species, Myzus persicae (Sulzer). Levels of EβF produced in each treatment were assayed by GC-FID quantification of EβF in volatiles collected from crushed aphids. Production of EβF by A. pisum reared in isolation (14.4ng/aphid) was significantly lower than that of aphids reared in a colony of conspecifics (49.1ng/aphid), reared in a M. persicae colony (31.5ng/aphid) or reared among conspecifics of another aaphid clone (52.7ng/aphid). Though A. pisum individuals in our experiments produced less EβF when reared among M. persicae than among conspecifics, this difference was not statistically significant. In a separate experiment we reared A. pisum individuals in isolation and exposed them to the odor of conspecifics. Under these conditions, EβF production was similar to that of aphids reared among conspecifics, suggesting that aphids use volatile cues to assess their social environment and regulate their production of alarm pheromone accordingly. [less ▲]

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See detailIdentification of material parameters to predict Single Point Incremental Forming forces
Bouffioux, Chantal ULg; Eyckens, P.; Henrard, Christophe et al

in International Journal of Material Forming (2008)

The purpose of this article is to develop an inverse method for adjusting the material parameters for single point incremental forming (SPIF). The main idea consists in FEM simulations of simple tests ... [more ▼]

The purpose of this article is to develop an inverse method for adjusting the material parameters for single point incremental forming (SPIF). The main idea consists in FEM simulations of simple tests involving the SPIF specificities (the “line test”) performed on the machine used for the process itself. This approach decreases the equipment cost. It has the advantage that the material parameters are fitted for heterogeneous stress and strain fields close to the ones occurring during the actual process. A first set of material parameters, adjusted for the aluminum alloy AA3103 with classical tests (tensile and cyclic shear tests), is compared with parameters adjusted by the line test. It is shown that the chosen tests and the strain state level have an important impact on the adjusted material data and on the accuracy of the tool force prediction reached during the SPIF process. [less ▲]

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See detailCoke dans nos rivières: une application originale de toxicologie environnementale
Charlier, Corinne ULg

in Revue Médicale de Liège (2008)

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See detailImplementation of health aspects (ER N°3) in the Construction Products; Directive (CPD) regarding emissions to indoor air
Lor, Marc; Vause, Kevin; Goelen, Eddy et al

Poster (2008)

Standardisation work on test methods for dangerous substances released in the indoor air by construction products is currently ongoing at European level. The paper presents a study conducted in Belgium ... [more ▼]

Standardisation work on test methods for dangerous substances released in the indoor air by construction products is currently ongoing at European level. The paper presents a study conducted in Belgium, which compares methods in three different test chambers and aiming at assessing the performance of the products placed on the market. [less ▲]

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See detailPathologies endocriniennes en rapport avec l'exposition aux pesticides organochlorés
Charlier, Corinne ULg

in Annales de Toxicologie Analytique (2008)

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See detailInterpreting equine thoracic radiographs: a guide to systematic evaluation and pulmonary patterns
Busoni, Valeria ULg

in XIV SIVE / FEEVA Congress Proceedings (2008)

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See detailQuantum imaging using single photon sources
von Zanthier, J.; Thiel, C.; Bastin, Thierry ULg et al

Conference (2008)

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See detailGenetic Causes of Pituitary Adenmas; Focus on the Roe of AIF Status in Multiple Tumor Types
Ansaneli Naves, L.; Ferreira Azevedo, M.; Faria de Castro, L. et al

in ENDO 2008: 90th Annual Meeting of the Endocrine Society - Abstract book (2008)

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See detailShort Course on Method Validation
Rozet, Eric ULg; Hubert, Philippe ULg

Conference (2008)

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See detailHydrogeological study of Somes-Szamos transboundary alluvial aquifer
Dassargues, Alain ULg; Drobot, Radu; Lenart, Laszlo et al

in Technical/Scientific Issues of Transboudary Water Management: Experience from around the world (2008)

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See detailEthanolic fermentation as a tool for high added value products purification from biomass
Destain, Jacqueline ULg; Laurent, Pascal ULg; Thonart, Philippe ULg et al

Poster (2008)

The biorefinery concept implies the development of processes in order to valorise the whole part of a crop. In this concept, white biotechnologies are usually considered for the production of new ... [more ▼]

The biorefinery concept implies the development of processes in order to valorise the whole part of a crop. In this concept, white biotechnologies are usually considered for the production of new compounds or compounds actually derived from the oil industry. For example, interest in ethanolic fermentation is growing nowadays, mainly for its energetic applications, starting from starch or saccharose. Biorefinery integrating lignocellulosic materials are under development. Whatever the initial substrate may be, wet technologies would produce sugars and other soluble materials from the biomass. Different results could be expected:most of the hydrolysates molecules are used by the microorganisms;some molecules could be inhibitors for the fermentation;some molecules are "indifferent ones" and could be concentrated by the fermentation proccess followed by distillation. In the latest case, these molecules are concentrated in the residual medium and could be more easily recuperated. An example of this exists in the production of ethanol from beet. The different juices (diffusion, clarified, ...) contain molecules such as raffinose, glutamine, betaine, saponins or pectic materials. Some products are used by the yeasts and other are concentrated. Our purpose is to summary the results obtained, allowing the development of the concept in other biorefinery applications. [less ▲]

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See detailRéintroduction et impacts sur leur environnement de plantes indigènes du Cerrado
Le Stradic, Soizig ULg; Buisson, Elise; Negreiros, Daniel et al

in Actualité de la recherche en écologie des communautés végétale (2008)

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See detailMilk urea content: effects of environmental parameters and relationships with other milk traits
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Istasse, Louis ULg et al

in Biodiversity and animal feed. Future challenges for grassland production. Book of abstracts. 22nd General Meeting of the European Grassland Federation (2008)

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See detailRéférentiel, Gestion Individualisée des Compétences et Portfolio Professionnel : trois outils au service de la progression et de la réussite des enseignants en développement
Poumay, Marianne ULg; Georges, François ULg

in Charnet, Chantal; Ghersi, Claire; Monimo, Jean-Louis (Eds.) Le défi de la qualité dans l'enseignement supérieur. Vers un changement de paradigme ... (2008)

Le Master Complémentaire Formasup (60 crédits) est organisé depuis maintenant 6 ans à l’université de Liège. Son public-cible est constitué d’enseignants du supérieur, de Belgique et de l’étranger ... [more ▼]

Le Master Complémentaire Formasup (60 crédits) est organisé depuis maintenant 6 ans à l’université de Liège. Son public-cible est constitué d’enseignants du supérieur, de Belgique et de l’étranger, désireux de réfléchir à leur pratique enseignante, de se remettre en question, d’entrer en projet pour innover dans leur classe, de mener une recherche et de communiquer sur ces avancées professionnelles. Le courant du « Scholarship of Teaching and Learning » (SoTL, Boyer 1990) nous a guidés dans la constitution d’un référentiel de compétences qui s’est affiné au fil des années et reflète aujourd’hui ces préoccupations. Pour développer ces compétences, les enseignants inscrits à Formasup sont chacun aidés d’un accompagnateur. Ils interagissent à travers un outil en ligne qui leur permet de dialoguer à propos de leur développement des compétences ciblées dans le référentiel. Ils se voient progresser, sont encouragés dans ces progrès et construisent peu à peu leur portfolio professionnel. Ce portfolio jouera le rôle de « dossier de réussite » (Tardif 2006). Après un cadrage contextuel et conceptuel, les trois outils (référentiel - outil d’accompagnement au développement de compétences - portfolio) font chacun l’objet d’une présentation, dont se dégage l’importance de la cohérence entre les différents instruments de la formation professionnelle des enseignants. [less ▲]

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See detailCarbon and Nitrogen Isotopic Ratios in Comets
Jehin, Emmanuel ULg; Manfroid, Jean ULg; Hutsemekers, Damien ULg et al

in LPI contribution 1405 (2008)

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See detailOperational monitoring of multi-qubit entanglement classes via tuning of local operations
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

Poster (2008)

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See detailExploiting tree-based variable importances to selectively identify relevant variables
Huynh-Thu, Vân Anh ULg; Wehenkel, Louis ULg; Geurts, Pierre ULg

in JMLR: Workshop and Conference Proceedings (2008), 4

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See detailPerturbation Finite Element Method for Refining Magnetic Circuit Models
Dular, Patrick ULg; V Sabariego, Ruth ULg; Ferreira da Luz, Mauricio Valencia et al

in Proceedings of the XX Symposium Electromagnetic Phenomena in Nonlinear Circuits (EPNC2008) (2008)

Model refinements of magnetic circuits are performed via a subproblem finite element method based on a perturbation technique. An approximate problem considering ideal flux tubes is first solved. It gives ... [more ▼]

Model refinements of magnetic circuits are performed via a subproblem finite element method based on a perturbation technique. An approximate problem considering ideal flux tubes is first solved. It gives the sources for finite element perturbation problems considering all the details of the exterior regions, thus accounting for leakage fluxes. The procedure simplifies both meshing and solving processes. It quantifies the gain given by each model refinement on both local and global quantities. [less ▲]

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See detailLa stabilisation fonctionnelle lombaire : Défintion du concept et arguments scientifiques
Demoulin, Christophe ULg; DISTREE, Vincent ULg; TOMASELLA, Marco ULg et al

in Abstract book des Mardis de la Kinésithérapie (2008)

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See detailAnalyzing transient instability phenomena beyond the classical stability boundary
Ali, Mahmoud; Glavic, Mevludin; Buisson, Jean et al

in Proceedings of the 40th North American Power Symposium (NAPS 2008) (2008)

We consider power systems for which the amount of power produced by their individual power plants is small with respect to the total generation of the system, and analyze how the transient instability ... [more ▼]

We consider power systems for which the amount of power produced by their individual power plants is small with respect to the total generation of the system, and analyze how the transient instability mechanisms of these systems change qualitatively when their size or the dispersion of their generators increases. Simulation results show that loss of synchronism will propagate more slowly and even stop propagating. Given the evolution of power systems towards more dispersed generation and geographically larger interconnections, we conclude that research in transient stability should focus more on the propagation of the loss of synchronism over longer time periods, so as to assess what happens to the overall system subsequently to the loss of synchronism of the first generators. We also argue that such studies might be very useful in order to provide guidelines for setting up power system control schemes to contain the propagation of instabilities, and we discuss some ideas for designing islanding based emergency control schemes for this. [less ▲]

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See detailA One-Phase Thermomechanical Constitutive Model for the Numerical Simulation of Semi-Solid Thixoforming
Koeune, Roxane ULg; Ponthot, Jean-Philippe ULg

in Proceedings of ESAFORM 2008, Conference on material forming (2008)

A thermo mechanical one-phase elasto-visco-plastic constitutive law has been developed in order to model thixoforming processes. The simulation of a simple academic 2D test has revealed the forces and ... [more ▼]

A thermo mechanical one-phase elasto-visco-plastic constitutive law has been developed in order to model thixoforming processes. The simulation of a simple academic 2D test has revealed the forces and weaknesses of the proposed model. [less ▲]

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See detailThe use of accelerometry in the assessment of vertical jump
Jidovtseff, Boris ULg; Lehance, Cédric ULg; Chauveau, Alexis et al

in Abstract book of 6th International Conference on Strength Training (Colorado Spring, USA) (2008)

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See detailErrors in architectural design process : towards a cognitive model.
Safin, Stéphane ULg; Leclercq, Pierre ULg; Blavier, Adelaïde ULg

in Marjanovic, Dorian; Storga, Mario; Pavkovic, Neven (Eds.) et al Proceedings of the Design 2008 : 10th International Design Conference (2008)

In architectural design process, the human error has a particular status. The later it is detected, the more expensive it is. Moreover, some errors can not be detected given the current state of the ... [more ▼]

In architectural design process, the human error has a particular status. The later it is detected, the more expensive it is. Moreover, some errors can not be detected given the current state of the design process and object definition. In this paper, we propose a model based on cognitive theories about human errors, applied to architectural preliminary design. In this model we classify the consequences of a design decision (direct, indirect, detected and undetected), we describe the steps of decision in architecture in relation to the process of errors detection and we introduce the concept of evolutive context. [less ▲]

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See detailEvaluation du potentiel antioxydant et de la propriété antiproliférative de l’huile essentielle d’armoise blanche du Maroc oriental
Imelouane, B.; Amjamdi, H.; Dubois, J. et al

Poster (2008)

La présente communication est consacrée à l’étude du pouvoir antioxydant de l’huile essentielle de l’armoise blanche. Les résultats obtenus montrent qu’effectivement l’huile essentielle de l’armoise et ... [more ▼]

La présente communication est consacrée à l’étude du pouvoir antioxydant de l’huile essentielle de l’armoise blanche. Les résultats obtenus montrent qu’effectivement l’huile essentielle de l’armoise et riche en antioxydant et inhibe le développement de quelques lignées cellulaires. [less ▲]

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See detailLazy planning under uncertainty by optimizing decisions on an ensemble of incomplete disturbance trees
Defourny, Boris ULg; Ernst, Damien ULg; Wehenkel, Louis ULg

in Defourny, Boris; Ernst, Damien; Wehenkel, Louis (Eds.) Recent Advances in Reinforcement Learning (2008)

This paper addresses the problem of solving discrete-time optimal sequential decision making problems having a disturbance space W composed of a finite number of elements. In this context, the problem of ... [more ▼]

This paper addresses the problem of solving discrete-time optimal sequential decision making problems having a disturbance space W composed of a finite number of elements. In this context, the problem of finding from an initial state x0 an optimal decision strategy can be stated as an optimization problem which aims at finding an optimal combination of decisions attached to the nodes of a disturbance tree modeling all possible sequences of disturbances w0, w1, . . ., w(T−1) in W^T over the optimization horizon T. A significant drawback of this approach is that the resulting optimization problem has a search space which is the Cartesian product of O(|W|^(T−1)) decision spaces U, which makes the approach computationally impractical as soon as the optimization horizon grows, even if W has just a handful of elements. To circumvent this difficulty, we propose to exploit an ensemble of randomly generated incomplete disturbance trees of controlled complexity, to solve their induced optimization problems in parallel, and to combine their predictions at time t = 0 to obtain a (near-)optimal first-stage decision. Because this approach postpones the determination of the decisions for subsequent stages until additional information about the realization of the uncertain process becomes available, we call it lazy. Simulations carried out on a robot corridor navigation problem show that even for small incomplete trees, this approach can lead to near-optimal decisions. [less ▲]

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See detailThree-dimensional analysis of oceanographic data with the software DIVA
Troupin, Charles ULg; Ouberdous, Mohamed ULg; Rixen, Michel et al

in Geophysical Research Abstracts (2008)

In oceanography, the process of gridding data is frequently used for various purposes, e.g. initialization of hydrodynamic models, or graphical representation of sparse data. DIVA (Data-Interpolating ... [more ▼]

In oceanography, the process of gridding data is frequently used for various purposes, e.g. initialization of hydrodynamic models, or graphical representation of sparse data. DIVA (Data-Interpolating Variational Analysis) is designed to perform such gridding tasks. It has the advantage of taking into account the intrinsic nature of oceanographic data, i.e. uncertainty in in situ measurements and anisotropy due to advection and irregular coastlines and topography. Three-dimensional reconstruction of temperature and salinity fields is achieved by stacking horizontal layers where independent analysis with DIVA are performed. Nevertheless, analysis in regions void of data may result in the presence of static instabilities between two or more consecutive layers. The method implemented in DIVA to remove such kinds of instabilities is the object of the present work. It consists of adding pseudo-data from one layer to the upper adjacent layer in order to create stable stratification in the vicinity of instabilities. Two approaches for assigning values to the pseudo data are tested: the first is called the mixing approach and aims at simulating a mixing process between two layers; the second is called the minimal perturbation, as it strives to minimise the perturbations inthe pseudo-data. A realistic application using temperature and salinity profiles in the North Atlantic is carried out and the results are compared with World Ocean Atlas climatologies. [less ▲]

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See detailGENIE: High-Resolution Study of Debris Disks
Absil, Olivier ULg; Augereau, Jean-Charles; Den Hartog, Roland et al

in Richichi, A.; Delplancke, F.; Paresce, F. (Eds.) et al The Power of Optical/IR Interferometry: Recent Scientific Results and 2nd Generation Instrumentation (2008)

GENIE, the Ground-based European Nulling Interferometer Experiment, will combine the lights collected in the L’ band by two VLT telescopes in a destructive way, thereby revealing the thermal and/or ... [more ▼]

GENIE, the Ground-based European Nulling Interferometer Experiment, will combine the lights collected in the L’ band by two VLT telescopes in a destructive way, thereby revealing the thermal and/or scattered emission of faint objects in the close neighbourhood of the target star. A prime scientific goal for GENIE thus consists in the detection and characterization of debris disks around nearby Vega-type stars. Thanks to its high angular resolution and operating wavelength (3.8 µm), GENIE will be particularly sensitive to the thermal emission from the warm dust standing within a few AU from the star, a part of the disks which is not accessible with current detection methods (IR photometric excesses, sub-millimeter imaging, …). In this paper, we investigate the capabilities of GENIE to detect and characterize the physical parameters of the debris disk around zeta Leporis, a prototypical Vega-type star suspected to harbour a warm dust component in its debris disk (Fajardo-Acosta et al., AJ 115, 2101). This study is then extended to the detection of faint exozodiacal disks around typical Darwin/TPF targets, thereby demonstrating the very high potential of GENIE in the field of high-contrast imaging. [less ▲]

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See detailA One Phase Thermomechanical Model for Semi-Solid Thixoforming
Koeune, Roxane ULg; Ponthot, Jean-Philippe ULg

in S2P, the 10th International Conference on Semi-Solid Processing of Alloys and Composites (2008)

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See detailAnalyse des changements structurels de la consommation alimentaire en Belgique : l’évolution de la demande en produits animaux d’origine bovine
Duquesne, Brigitte ULg

in 15èmes Journées 3R (Rencontres, Recherches, Ruminants) Paris, 3 et 4 décembre 2008 : actes du colloque (2008)

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See detailCytochemical and immunocytological study of the reptilian nucleolus
Lamaye, Françoise; Thiry, Marc ULg

Poster (2008)

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See detailDu crayon au stylo numérique : influences des interprétations numériques sur l'activité graphique en tâches de conception.
Safin, Stéphane ULg; Juchmes, Roland ULg; Leclercq, Pierre ULg

in IHM 2008: Proceedings of the 20th international conference on Francophone sur l'Interaction Homme-Machine (2008)

Notre recherche s'inscrit dans le cadre du développement de logiciels basés sur le dessin à main levée dans le domaine de l'architecture. Dans cet article, nous étudions l’activité de "mise au net" de ... [more ▼]

Notre recherche s'inscrit dans le cadre du développement de logiciels basés sur le dessin à main levée dans le domaine de l'architecture. Dans cet article, nous étudions l’activité de "mise au net" de dessins lors de la phase d'esquisse préliminaire et cherchons à identifier des modifications de cette activité in-duites par un environnement logiciel. Nous observons quatre activités de conception, deux sur papier-crayon et deux sur environnement numérique et déduisons des conclusions opérationnelles pour le dé-veloppement de logiciels destinés à supporter le croquis d'architecture. [less ▲]

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See detailEmerging hyphenated analytical techniques for POPs
Focant, Jean-François ULg

in Organohalogen Compounds (2008), 70

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See detailNumerical, analytical and experimental investigations on the response of steel and composite buildings further the loss of a column
Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg; Luu, Nguyen Nam Hai ULg

in Proceedings of the Colloquium on structural design of constructions subjected to exceptional or accidental actions (2008)

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. Accord-ing to Eurocodes and some ... [more ▼]

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. Accord-ing to Eurocodes and some different other national design codes, the structural integrity of civil engineering constructions should be ensured through appropriate measures but, in most of the cases, no precise practical guidelines on how to achieve this goal are provided. A European RFCS project entitled “Robust structures by joint ductility” has been set up in 2004, for three years, with the aim to provide requirements and practical guidelines ensuring the structural integrity of steel and composite structures under exceptional events through an appropriate robustness. In particular, one substructure test simulating the loss of a column in a composite building has been performed at Liège University. Present paper describes ana-lytical, numerical and experimental investigations carried out at Liège University as part of this European project. [less ▲]

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See detailNumerical modelling of thin-walled stainless steel structural elements in case of fire
Lopes, N.; Vila Real, P.; Simoes da Silva, L. et al

in Kodur; Tan (Eds.) Proceedings of the Fifth International Conference Structures in Fire (2008)

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the ... [more ▼]

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the program was changed in order to deal with the stainless steel 2D material properties to be used with shell elements and ii) the possibility of the program to take into account residual stresses in shell elements was introduced. The stainless steel stress-strain relationship at high temperatures, was based on the one presented in part 1.2 of Eurocode 3 [1], which has no initial linear branch as the case of carbon steel. The hardening rule to be used on the shell element formulation could not be exactly established without an approximation of the Eurocode 3 constitutive law [1]. Due to the fact that the SAFIR procedure to take into account the residual stresses consists in transforming them first into residual strains and adding them after to the other initial strains [2], it was necessary to implement a procedure that took in consideration the nonlinearity of the material stress-strain relationship. The paper shows the influence of the residual stresses on the ultimate load bearing resistance of thin-walled stainless steel structural elements in case of fire. [less ▲]

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See detailThe influence of affective valence on false recognition in the DRM procedure.
Dehon, Hedwige ULg; Laroi, Frank ULg; Van der Linden, Martial

Poster (2008)

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See detailAphid honeydew is not only a sugary and amino-acid secretion
Leroy, Pascal ULg; Heuskin, Stéphanie ULg; Sabri, Ahmed ULg et al

Poster (2008)

Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most ... [more ▼]

Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most important are sugars (90-95% of the dry weight) and amino acids. This excretory product, used by parasitoids and predators, plays a crucial role in the tritrophic interactions : (1) honeydew is an important food complement and (2) honeydew acts as a volatile and a contact kairomone. These characteristics could be exploited for enhancing the biological control in fields through the use of an « artificial honeydew ». [less ▲]

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See detailRefinement of Analytical Forms of Air-Gap Relative Permeance Using a Perturbation Finite Element Method
Ferreira da Luz, Mauricio V.; Dular, Patrick ULg; V Sabariego, Ruth ULg et al

in Proceedings of the 13th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2008) (2008)

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See detailMicrolensing in binary systems
Ricci, Davide ULg

(2008)

We present an easy way to simulate and fit light curves of microlensing events for the particular case of binary stellar systems with occultation, using semi-automatic graphical interfaces written in IDL ... [more ▼]

We present an easy way to simulate and fit light curves of microlensing events for the particular case of binary stellar systems with occultation, using semi-automatic graphical interfaces written in IDL language. Gravitational microlensing effects are known to induce light amplifications of the background source and, until now, photometry has been the main technique used to study this phenomenon. A good software, capable to fit multiple parameters of the observed light curve of the microlens event, would allow astronomers to obtain important informations about the physical characteristics of the objects studied. The developpement of such a software is focused to some peculiar case, briefly treated in Sec. 1. The software, written following the parametrization described in Sec. 2, is presented in Sec. 3 and 4. [less ▲]

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See detailProbabilistic Pose Recovery Using Learned Hierarchical Object Models
Detry, Renaud ULg; Pugeault, Nicolas; Piater, Justus ULg

in International Cognitive Vision Workshop (Workshop at the 6th International Conference on Vision Systems) (2008)

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See detailSurvival of yolk’s immunoglobulins directed against Salmonella Enteritidis and Salmonella Typhimurium in the gastro-intestinal tract of the broiler chicken
Marcq, Christopher ULg; Graide, Virginie; Beckers, Yves ULg et al

in Proceedings of the Thirteenth Conference on Food Microbiology (2008)

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See detailMagnetic resonance imaging arteriography of canine normal brain: an anatomic study
Jacqmot, Olivier ULg; Hoffmann, A. C.; Bustin, P. H. et al

Poster (2008)

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See detailA mechanobioregulatory model for the study of bone fracture healing
Geris, Liesbet ULg; Gerisch, A.; Weiner, R. et al

in Proceedings of the European Conference on Mathematical and Theoretical Biology (2008)

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See detailAnti-inflammatory effects of ipratropium bromide in rats with cadmium-induced acute pulmonary inflammation
Zhang, W.; Fievez, Laurence ULg; Cheu, Esteban ULg et al

in Proceedings of the 12th Annual Meeting of the French Society of Pharmacology and Therapeutics (2008)

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See detail(Inter)subjectification in the Middle English Passive construction
Petré, Peter ULg

Conference (2008)

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See detailEquité et efficacité du système d'enseignement
Baye, Ariane ULg

in Le défi social bruxellois, un déficit de qualification, l'école en question (2008)

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See detailFlexural Buckling of Axially Loaded Ferritic Stainless Steel Columns in case of Fire
Lopes, N.; Vila Real P.M.M.; Simoes da Silva, L. et al

in Ofner (Ed.) Proceedings of the 5th European Conference on Steel and Composite Structures (EUROSTEEL 2008) (2008)

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See detailAnisotropy of magnetic susceptibility in the Farsund charnockite (Southern Norway) reveals late-Sveconorwegian strike-slip ductile shearing
Bolle, Olivier ULg; Diot, Hervé

in AGC/GAC – AMC/MAC – SEG – SGA Abstract Volume (2008), 33

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See detailProtein synthesis and folding is a rate limiting step for bacterial growth at low temperatures.
Piette, Florence; D'Amico, Salvino; Leprince, Pierre ULg et al

Poster (2008)

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See detailComparison between EC3 and the original proposal for Beam-Columns in Case of Fire
Talamona, D.; Lopes, N.; Vila Real, P. et al

in Ofner (Ed.) Proceedings of the 5th European Conference on Steel and Composite Structures (EUROSTEEL 2008) (2008)

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See detailConsistency of fuzzy model-based reinforcement learning
Busoniu, Lucian; Ernst, Damien ULg; Babuska, Robert et al

in Proceedings of the 2008 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE-08) (2008)

Reinforcement learning (RL) is a widely used paradigm for learning control. Computing exact RL solutions is generally only possible when process states and control actions take values in a small discrete ... [more ▼]

Reinforcement learning (RL) is a widely used paradigm for learning control. Computing exact RL solutions is generally only possible when process states and control actions take values in a small discrete set. In practice, approximate algorithms are necessary. In this paper, we propose an approximate, model-based Q-iteration algorithm that relies on a fuzzy partition of the state space, and a discretization of the action space. Using assumptions on the continuity of the dynamics and of the reward function, we show that the resulting algorithm is consistent, i.e., that the optimal solution is obtained asymptotically as the approximation accuracy increases. An experimental study indicates that a continuous reward function is also important for a predictable improvement in performance as the approximation accuracy increases. [less ▲]

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See detailL'enseignement du latin comme L² dans la Pars Orientis de l'Empire romain : les Hermeneumata Pseudodositheana
Rochette, Bruno ULg

in Bellandi, Franco; Ferri, Rolando (Eds.) Aspetti della scuola nel mondo romano: atti del covegno (Pisa, 5-6 dicembre 2006) (2008)

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See detailDating an early medieval church by the luminescence method: the case of St Martin at Angers (France)
Blain, Sophie ULg; Prigent, Daniel; Guibert, Pierre et al

Poster (2008)

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See detailCoping with Desertification : Migration as a Forced Choice and a Livelihood Strategy
Gemenne, François ULg

in Ozer, André; Swinne, Danielle (Eds.) Desertification : Migration, Health, Remediation and Local Governance (2008)

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See detailInfluence of natural and synthetic peptides on biomimetic membranes
Kouzayha, Achraf; Wattraint Olivier; Nasir, Mehmet Nail ULg et al

Poster (2008)

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See detailVariable selection for dynamic treatment regimes: a reinforcement learning approach
Fonteneau, Raphaël ULg; Wehenkel, Louis ULg; Ernst, Damien ULg

Conference (2008)

Dynamic treatment regimes (DTRs) can be inferred from data collected through some randomized clinical trials by using reinforcement learning algorithms. During these clinical trials, a large set of ... [more ▼]

Dynamic treatment regimes (DTRs) can be inferred from data collected through some randomized clinical trials by using reinforcement learning algorithms. During these clinical trials, a large set of clinical indicators are usually monitored. However, it is often more convenient for clinicians to have DTRs which are only defined on a small set of indicators rather than on the original full set. To address this problem, we analyse the approximation architecture of the state-action value functions computed by the fitted Q iteration algorithm - a RL algorithm - using tree-based regressors in order to identify a small subset of relevant ones. The RL algorithm is then rerun by considering only as state variables these most relevant indicators to have DTRs defined on a small set of indicators. The approach is validated on benchmark problems inspired from the classical ‘car on the hill’ problem and the results obtained are positive. [less ▲]

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See detailComparing Simulations and Measurements of Prestressed MEMS
Hannot, Stephan; Rochus, Véronique ULg; Rixen, Daniel

in ECCOMAS (2008)

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See detailNew insights in auditory organ development: the inner pillar cell goes it own way
Thelen, Nicolas; Malgrange, B; Thiry, Marc ULg

Poster (2008)

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See detailHETEROGENEITY OF ZOOXANTHELLAE DENSITY IN THE CORAL ACROPORA GLOBICEPS AROUND MOOREA (FRENCH POLYNESIA)
Ladrière, Ophélie ULg; van Lierde, Elodie; Penin, Lucie et al

Poster (2008)

Understanding the natural heterogeneity of coral zooxanthellae density appears as very important to understand variations in coral survival due to bleaching (the loss of these micro-algal symbionts ... [more ▼]

Understanding the natural heterogeneity of coral zooxanthellae density appears as very important to understand variations in coral survival due to bleaching (the loss of these micro-algal symbionts). Heterogeneity of coral bleaching at different observation scales (within a colony, among neighbouring colonies of the same species or on a wider scale) remains largely misunderstood. The present work explores intracolonial, spatial and temporal variations of zooxanthellae density in the coral Acropora globiceps Dana 1846, over a period of three months on the forereef of Moorea, French Polynesia. In our study, intracolonial zooxanthellae densities did not vary significantly. However, zooxanthellae densities differed slightly between inner and outer branches but this trend was not significant at 6, 12 and 18 meters depth. On a wider scale, zooxanthellae densities also vary spatially : a positive correlation was observed between depth and symbiont density (density increases when light intensity decreases, so according to depth). Moreover, the location of colonies exposed to different hydrodynamical conditions was not a parameter controling the concentration of zooxanthellae. Finally, the temporal variation of zooxanthellae densities did not show significant variations even if it decreased slightly over the study period. The results of this study highlight the importance of accounting for variations within and among colonies to determine zooxanthellae densities and to assess the evolution of zooxanthellae populations. [less ▲]

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See detailLes aspects pratiques de la mise en oeuvre d'un pouvoir de régulation (Angleterre, Italie, Espagne, Bulgarie et Belgique)
Jacob, Steve; Ruano de la Fuente, José; Galabov, Antony et al

in Pauliat, Hélène (Ed.) Services publics, concurrence, régulation : le grand bouleversement en Europe ? (2008)

Compte-rendu de la table ronde sur le sujet organisée dans le cadre du colloque EUROPA de 2006.

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See detailLe Flair de Sainte-Beuve. Chose littéraire et modernité poétique
Durand, Pascal ULg; Bertrand, Jean-Pierre ULg

in Bertrand, Jean-Pierre; Glinoer, Anthony (Eds.) Sainte-Beuve et le sens du moderne (2008)

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See detailFamilial pituitary tumors involving the Aryl Hydrocarbon Receptor Interacting Protein (AIP1)
Beckers, Albert ULg

in 11th International Workshop on Multiple Endocrine Neoplasia - Symposium 1 "Multiple Tumors and tje pituitary" - Abstract book (2008)

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See detailContribution des macrophytes flottants dans l'épuration des eaux usées
Tangou Tabou, Thierry ULg

in Annales de la faculté des Sciences, Université de Kinshasa, Science et Discursivité et Presse universitaire de Kinshasa (N°spécial) (2008)

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See detailQuelques données chiffrées concernant la place de la Belgique dans le commerce du bois de Pericopsis elata
Bourland, Nils ULg; Vanden Bloock, A.; Doucet, Jean-Louis ULg

in Rapport général de l’Atelier OIBT/CITES sur l’Afrormosia (Kribi, Cameroun, 02.04.-04.04.08.) (2008)

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See detailVoltaire et les débuts du Journal encyclopédique. Une collaboration médiatique sous contrôle
Droixhe, Daniel ULg

in Tilkin, Françoise (Ed.) L'encyclopédisme au XVIIIe siècle. Actes du Colloque organisé par le Groupe d'étude du XVIIIe siècle de l'Université de Liège (Liège, 30-31 octobre 2006) (2008)

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See detailProfile of methylaion of tumour related genes in breast cancer in Tunisian women
Hachana, Mohamed Ridha ULg; Trimeche, Mounir; Ziadi, Sonia et al

in European Journal of Cancer (2008), 6(9), 195

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See detailATOMIC STRUCTURES OF HEAVY ELEMENTS : RECENT PROGRESS AND PERSPECTIVES
Biémont, Emile ULg; Fivet, V.; Palmeri, P. et al

Conference (2008)

In the present paper, we discuss some recent advances concerning the determination of new radiative parameters (transition probabilities, oscillator strengths, radiative lifetimes, branching fractions ... [more ▼]

In the present paper, we discuss some recent advances concerning the determination of new radiative parameters (transition probabilities, oscillator strengths, radiative lifetimes, branching fractions, Landé factors) in heavy ions. We also emphasize the difficulties that are frequently met in the field and that sometimes prevent obtaining accurate atomic data for the transitions of astrophysical interest. We concentrate particularly on the determination of radiative parameters for selected rare-earth (RE) ions (lanthanides and actinides) and for some atoms and ions of the sixth row of the periodic table. [less ▲]

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