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See detailPolyphased karst systems in sandstones and quartzites of Minas Gerais, Brazil
Willems, Luc ULg; Rodet, Joël; Pouclet, André et al

in Proceeding 14th UIS Congress, Athens-Kalamos, 23-28 august 2005, Abstract Book : 71. (2005)

The state of Minas Gerais (Brazil) exhibits several major karst areas located in sandstone and quartzite terrains, that display a complex suite of underground and surface karstic forms. In the Espinhaço ... [more ▼]

The state of Minas Gerais (Brazil) exhibits several major karst areas located in sandstone and quartzite terrains, that display a complex suite of underground and surface karstic forms. In the Espinhaço Ridge, central Minas Gerais, several caves, up to a few hundred metres long, occur in the surroundings of the town of Diamantina. Some of these caves, such as Salitre, represent swallow-holes and show dome pits. Other horizontal caves are characterized by corrosion forms generated into the phreatic zone. In some places, such as in the Rio Preto area, these phreatic forms have been overprinted by ceiling tubes, suggesting a polyphase karst evolution, prior to the draining of the cave. Relicts of passages, with circular cross section up to a metre in diametre, can be found amidst the residual tower-like surface landforms, which constitute a typical scenery in the landscape. Their dissection is due to a generalised karstification in the area, resulting in closed canyons, megakarrens and kamenitzas. In southern Minas Gerais, close to the Mantiqueira Ridge, the caves of the state park of Ibitipoca can extent 2 km in length. These caves are associated with a very large hanging geological syncline. Several of these caves contain active streams, that flow for hundreds of metres before disappearing in sand-choked passages. Keyhole cross sections characterize steeply descending passages in these caves, indicating a change from slow phreatic flow towards a faster vadose flow responsible for the vertical incision of the passage. Such change is probably related to base level lowering and/or to turn in the direction of the water flow. Several generations of wall-pockets, from a few centimetres to over a metre long, occur into the caves. These features are good indicators of the initial phase of speleogenesis, generating the initial conduits by their coalescence. This mechanism is also responsible for cut-off meanders. The main river in the area, which flows along the syncline axis, cuts through a rock barrier, generating a tunnel-like passage. This cave drains, through resurgences in its walls, part of the water that flows in other caves located in the flank of the syncline. The non-carbonate karst features observed in the state of Minas Gerais demonstrate the complex organisation of polyphase karst systems due to the linkage of underground and surface forms not previously connected. As in carbonate areas, these systems may play an important hydrological role. [less ▲]

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See detailL’interjection dans un corpus d’auteurs latins
Denooz, Joseph ULg

in Calboli, Gualtiero (Ed.) Paper on Grammar IX 2 (Actes du 12e Congrès International de Linguistique Latine) (2005)

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See detailDevelopment of a neural network to predict the final geometry of forged rings after cooling
Casotto, S.; Bruschi, S.; Pascon, Frédéric ULg et al

in Banabic, D. (Ed.) Proceedings of the 8th ESAFORM Conference on Material Forming (Vol. 2) (2005)

The paper deals with an application of Artificial Neural Networks (ANNs) to predict the geometry of hot forged pieces after cooling. Different ANNs have been considered and evaluated; then a network with ... [more ▼]

The paper deals with an application of Artificial Neural Networks (ANNs) to predict the geometry of hot forged pieces after cooling. Different ANNs have been considered and evaluated; then a network with two hidden layers has been set up. Training and testing data have been obtained through calibrated numerical simulations of the cooling phase carried out with a finite element (F.E.) code. The good agreement between predicted and numerical results confirms the possibility of using well-trained neural network to foresee final dimensions of pieces after hot forging operations. [less ▲]

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See detailEvaluation de la condition sportive du cheval de complet sur le terrain
Van Erck, Emmanuelle; de Moffaerts, Brieuc; Art, Tatiana ULg et al

in Proceedings du Congrès Annuel A.V.E.F. (2005)

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See detailMorphological and mechanical characterization of porous structures with micro-CT
Kerckhofs, Greet ULg; Wevers, Martine; Schrooten, Jan

in Abstract book SkyScan User Meeting 2005 (2005)

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See detailTheophylline increases glutathione in BAL of cadmium-exposed rats
Kirschvink, Nathalie; Fievez, Laurence ULg; Desmet, C. et al

in Proceedings of the American Thoracic Society, San Diego, California (2005)

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See detailForecasting the Dourbes K index by using solar wind parameters
Andonov, Borislav; Kutiev, Ivan; Warnant, René ULg et al

in Proceedings of Beacon Satellite Symposium 2004 (2005)

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See detailProtection by theophylline of inflammation and emphysema induced by repeated inhalation of cadmium chloride in rats
Fievez, Laurence ULg; Kirschvink, Nathalie; Onclinx, C. et al

in Proceedings of the American Thoracic Society, San Diego, California (2005)

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See detailThe Influence of Blends on the Potential of Extrasolar Planets Transit Surveys
Gillon, Michaël ULg; Magain, Pierre ULg; Guillot, T. et al

in Protostars and Planets V (2005)

Due to their low geometric probability, planetary transits are rare, and photometric surveys searching for such events have to observe many stars at once and, thus, deal with rather crowded fields. This ... [more ▼]

Due to their low geometric probability, planetary transits are rare, and photometric surveys searching for such events have to observe many stars at once and, thus, deal with rather crowded fields. This crowding has two negative effects on the final results of the survey: it decreases the number of detectable transits and increases the number of false positives. We have studied the influence of crowding on different surveys (existing ones as well as planned or even fictitious ones). On the basis of simple but realistic assumptions about the fraction of lower main sequence stars harboring telluric and giant planets within the outer limit of their habitable zone, we predict the harvests of several surveys with and without taking into account the losses due to blends. Our results show that deep surveys such as OGLE-III are much more affected by blends than wide field surveys. Space missions such as Corot and Kepler, although they use very broad PSFs in order to increase the S/N, loose a much lower fraction of transits than deep ground-based surveys. We have also estimated the proportion of false positives in the harvest of the surveys. Thus, our results provide a reliable comparison between the considered surveys. [less ▲]

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See detailRepeatability of allergen challenges in a feline model of asthma : effect on airway reactivity and airway inflammation
Kirschvink, Nathalie; Leemans, Jérôme ULg; Delvaux, F. et al

in Proceedings of the American Thoracic Society, San Diego, California (2005)

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See detailSpatial pattern analysis to address reliability issues in remotely sensed data.
Colson, F; Bogaert, Jan ULg; Ceulemans, R

in Veroustraete, F; Bartholomé, E; Verstraeten, W (Eds.) Proceedings of the Second International VEGETATION User Conference (2005)

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See detailDissociation between recall and recognition memory in amnesia: The case of a patient with hippocampal damage following carbon monoxide poisoning
Bastin, Christine ULg; Van der Linden, Martial ULg; Charnallet, Annik et al

in Proceedings of the Joint Mid-year meeting of the International Neuropsychological Society, the Division of Neuropsychology of the British Psychological Society and the British Neuropsychological Society (2005)

There is currently a debate regarding the status of recall and recognition memory in amnesic patients with focal hippocampal damage. Proportionate deficits of recall and recognition memory have been ... [more ▼]

There is currently a debate regarding the status of recall and recognition memory in amnesic patients with focal hippocampal damage. Proportionate deficits of recall and recognition memory have been observed in some patients with selective hippocampal damage. In addition, these patients showed an impairment of both the recollection and familiarity aspects of recognition memory. In contrast, other amnesic patients with selective hippocampal lesions demonstrated relatively preserved recognition memory, despite severely impaired recall abilities. In some of them, familiarity processes were found to be intact. The resolution of this controversy has important implications for theories of episodic memory. In the present study, we examined the recall and recognition performance of an amnesic patient, MR, who suffered from bilateral hippocampal damage and temporoparietal cortical atrophy following carbon monoxide poisoning. Verbal and nonverbal recall and recognition memory were measured by tasks matched for difficulty. On these tasks, MR’s recall performance was more severely impaired than his recognition memory. In addition, MR’s recognition performance was normal on most of the tasks. In order to determine on which processes MR based his recognition decisions, we administered to the patient and to matched controls the process dissociation procedure. This evaluates the contribution of recollection and familiarity within a recognition task. The results indicated that, in this patient, familiarity was preserved, but recollection was impaired. This study thus supports the idea that amnesic patients with hippocampal damage can show preserved familiarity-based recognition memory, despite poor recall and recollection. [less ▲]

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See detailA STEP: An Antarctica Search for Transiting Extrasolar Planets
Fressin, F.; Guillot, T.; Bouchy, F. et al

in Protostars and Planets V (2005)

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See detailIn vitro and in vivo effects of salbutamol acetonide on cat airways
Leemans, Jérôme ULg; Kirschvink, Nathalie; Delvaux, F. et al

in Proceedings: Société Belge de Physiologie et de Pharmacologie Fondamentales et Cliniques (2005)

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See detailNote su alcuni mosaici ostiensi di nuova e remota acquisizione.
Morard, Thomas ULg

in X Congresso dell'Associazione Italiana per lo Studio e la Conservazione del Mosaico (AISCOM) : Lecce 18-21 février 2004 (2005)

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See detailMMP-9 activity and 8-ISO-PGF2alphaare increased in bronchoalveolar lavage fluid in a model of feline asthma
Kirschvink, Nathalie; Leemans, Jérôme ULg; Delvaux, F. et al

in Proceedings of the American College of Veterinary Internal Medicine, Baltimore, Maryland (2005)

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See detailModeling of the fatigue cracks in welded beam-to-column connection of steel moment frame buildings submitted to earthquake
Lequesne, Cédric ULg; Gerday, Anne-Françoise ULg; Plumier, André ULg et al

in Aliabadi, M. H.; Planas, J.; Buchholz, F.-G. (Eds.) et al Proceedings of the 4th International Conference on Fracture and Damage Mechanics (2005)

Fatigue cracks in welded connections of steel moment frame buildings submitted to earthquakes are studied. The connections of beams with thick flanges designed to resist to seismic phenomena by plastic ... [more ▼]

Fatigue cracks in welded connections of steel moment frame buildings submitted to earthquakes are studied. The connections of beams with thick flanges designed to resist to seismic phenomena by plastic dissipation are presented. The structural components, the materials and the crack mechanics are described. To predict the crack initiation, the knowledge of residual internal stresses, generated by the welding process, is required. So these stresses are assessed by a FEM thermo-mechanical analysis. The potential sites of crack locations are detected by using an FEM model of the connection with the continuum damage model of Lemaître and Chaboche. After these FEM analyses, new meshes with specific elements located at the potential crack locations are defined. A cohesive zone law is used to model the crack propagation. This model describes the crack growth by analyzing the energy released by the generation of the new surfaces and damage micro-phenomena behind the crack tip. A constitutive tension-separation law computes this energy. In these cases of low cycle fatigue, the damage and the cyclic loading conditions are taken into account. [less ▲]

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See detailComparison of bronchodilators in feline airways: In vitro and in vivo investigations
Leemans, Jérôme ULg; Kirschvink, Nathalie; Delvaux, F. et al

in In proceedings: 15th Congress European College of Veterinary Internal Medicine – companion animals (2005)

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See detailRestoration of Posidonia oceanica meadows : means and limitations.
Gobert, Sylvie ULg; Lepoint, Gilles ULg; Bouquegneau, Jean-Marie ULg et al

in Proceedings of the seventh international conference on the Mediterranean coastal environment. Medcoast 05 (2005)

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See detailHard pomeron contribution to forward elastic scattering
Cudell, Jean-René ULg; Lengyel, A.; Martynov, E. et al

in Nicolescu, B. (Ed.) Conference On Elastic And Diffractive Scattering: Towards High Energy Frontiers: The 20th Anniversary Of The Blois Workshops (2005)

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See detailRestrictieve focuspartikels in het Nederlands: enkel en uitsluitend en alleen (maar) problemen voor Franstaligen?
Meesters, Gert ULg

in Hiligsmann, Philippe; Beheydt, Ludo; Degand, Liesbeth (Eds.) et al Neerlandistiek in Frankrijk en in Franstalig België / Les études néerlandaises en France et en Belgique francophone (2005)

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des ... [more ▼]

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des particules synonymes alleen, maar, alleen maar, slechts, enkel, louter, uitsluitend. Après une brève introduction au monde des particules et l'analyse de quelques phrases rédigées par des francophones qui apprennent le néerlandais, il sera démontré qu'il n'est pas évident, même pour des néerlandophones, de savoir si une particule est utilisée correctement ou non. Des recherches dans des corpus de textes pourront aider à trouver une solution à ce problème. Au moyen de recherches dans un corpus de textes bien structuré, il sera possible de découvrir des caractéristiques sémantiques, syntaxiques ainsi que des caractéristiques de variation stylistique et régionale qui distinguent ces particules quasi synonymes. Les résultats de ces recherches seront utiles à la didactique du néerlandais langue étrangère en ce qui concerne les particules. [less ▲]

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See detailCommon Agricultural Policy and the environment : are they compatible ?
Burny, Philippe ULg

in Universitatea "Babes-Boliay" Cluj-Napoca (Ed.) Simpozion national "Contributii stiintifice în tehnologii si echipamente pentru evaluarea si protectia mediului" (2005)

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See detailMultiple Realities of Virtual Architecture, Opening Session of Virtual Techniques for Architecture
Leclercq, Pierre ULg; Martin, G.

in Fisher, X.; Coutellier, D. (Eds.) Proceedings of Virtual Concept Conference '05 - Research in Interactive Design (2005)

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See detailEfficient and robust simulation of tissue differentiation in fracture healing
Gerisch, Alf; Geris, Liesbet ULg

in Proceedings of the European Conference on Mathematical and Theoretical Biology (2005)

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See detailA multicenter collaborative study to measure the prevalence of pituitary disease : methodology and preliminary findings
Daly, Adrian ULg; Petrossians, Patrick ULg; Murat, A. et al

in 9th International Pituitary Congress - Abstract book (2005)

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See detailApplication of a sequential data assimilation technique to improve the results of a 1D couled physical-biogeochemical model of the Ligurian Sea
Raick, C.; Soetaert, K.; Grégoire, Marilaure ULg

in VLIZ Young Scientists' Day, Brugge, Belgium 25th February 2005: book of abstracts (2005)

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See detailLe concept d'esquisse augmentée
Leclercq, Pierre ULg

in Proceedings of SCAN 2005 (2005)

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See detailMaterial Identification Using a Bi-Axial Test Machine
Flores, Paulo; Moureaux, Pierre; Habraken, Anne ULg

in Proceedings of the International Conference on Advances in Experimental Mechanics (2005)

This paper shows the identification of material parameters for a DC06 IF steel sheet of 0.8 mm by mechanical tests. The experimental equipment used consists of a tensile test machine, a bi-axial test ... [more ▼]

This paper shows the identification of material parameters for a DC06 IF steel sheet of 0.8 mm by mechanical tests. The experimental equipment used consists of a tensile test machine, a bi-axial test machine able to perform plane-strain and simple shear tests separately or simultaneously and an optical strain gauge. Tensile, plane-strain and simple shear tests were performed at 0°, 45° and 90° from the sheet rolling direction in order to identify Hill 1948 and Hosford 1979 yield criteria. Two identification methods are used: one based on strain measurements (anistropy coefficients) and the other one based on stress measurements (plastic contours). The results confirm that mechanical tests applying other stress-states than tensile are required to obtain accurate material parameters identification. [less ▲]

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See detailPaysage et projets urbains
Teller, Jacques ULg

in Actes du Colloque de la CPDT – Territoire, urbanisation et paysages du 19 novembre 2004 (2005)

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See detailEvocation d'une expérience d'enseignement: « Architecture paramétrable et architecture fractale, génération numérique des formes complexes. »
Bianchi, Romuald ULg; Defawes, Georges ULg

in Actes de SCAN'05 : Séminaire de conception architecturale numérique (2005)

cette communication relate l'élaboration d'un cours orienté vers la découverte des formes à géométrie complexe. Le contenu de ce cours, dispensé pour la 1ère fois en mai 2005, a déjà évolué. Il est apparu ... [more ▼]

cette communication relate l'élaboration d'un cours orienté vers la découverte des formes à géométrie complexe. Le contenu de ce cours, dispensé pour la 1ère fois en mai 2005, a déjà évolué. Il est apparu que les outils proposés pour explorer les formes complexes étaient également opérationnels comme outils d'assistance à l'esquisse [less ▲]

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See detailDiscussion on Paper D04 “Ultimate limit state design technology for aluminium multi-hull ship structures, SNAME Transactions, Vol.113, (2005)”
Rigo, Philippe ULg; Richir, Thomas

in Ultimate limit state design technology for aluminium multi-hull ship structures, SNAME Transactions, Vol.113 (2005)

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See detailWidth-to-thickness ratios for classification of tubular sections
Zhao, Xiao-Ling; Jaspart, Jean-Pierre ULg

in Proceedings of the 2005 Eurosteel Conference on Steel and Composite Structures (2005)

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See detailDiscussion on the Report of Committee IV.2 – ISSC’2003 "Design Methods"
Rigo, Philippe ULg

in 15th Int. Ship and Offshore Structures Congress (2005)

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See detailDe invloed van mechanische parameters op de weefselrespons bij immediaat belaste titanium implantaten
Vandamme, Katleen; Duyck, Joke; Van Oosterwyck, Hans et al

in Proceedings van het Congres Verbond der Vlaamse Tandartsen (2005)

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See detailAnalyse inverse par algorithme génétique en géotechnique : application à un problème d’excavation
Levasseur, Séverine ULg; Malécot, Yann; Boulon, Marc et al

in Congrès Français de la Mécanique (2005)

Cet article est consacré à l’identification des paramètres constitutifs d’un modèle de Mohr-Coulomb à partir de mesures de déplacements d’un mur de soutènement. Pour minimiser la fonction objectif, une ... [more ▼]

Cet article est consacré à l’identification des paramètres constitutifs d’un modèle de Mohr-Coulomb à partir de mesures de déplacements d’un mur de soutènement. Pour minimiser la fonction objectif, une optimisation par algorithme génétique est proposée. Cette méthode performante permet d’identifier un échantillon des solutions du problème inverse. [less ▲]

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See detailGlobal Navigation Satellite Systems : A new tool in atmosphere sciences
Warnant, René ULg; Jodogne, Jean-Claude; Delobbe, Laurent et al

in Arijs, E.; Ducarme, B. (Eds.) Proceedings of the Earth Science Day : “Geodesy and Geophysics for the third Millenium in Belgium” (2005)

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See detailReply to the discussion on the Report of Committee III.1 – ISSC’2003 "Ultimate Strength"
Rigo, Philippe ULg

in 15th Int. Ship and Offshore Structures Congress (2005)

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See detailLa verbalité de la perception selon la Mîmâmsâ et le Nyâya
Verpoorten, Jean-Marie ULg

in Chenet, François (Ed.) Catégories de langue et catégories de pensée en Inde et en Occident (2005)

A partir des définitions de la perception selon le Nyāya (Nyāyasūtra 1 1 4) et laMīmāṃsā (Mīmāṃsāsūtra 1 1 4),on aborde un chapitre de la Prakaraņapañcikā de Śālikanātha(750-820), où celui-ci discute du ... [more ▼]

A partir des définitions de la perception selon le Nyāya (Nyāyasūtra 1 1 4) et laMīmāṃsā (Mīmāṃsāsūtra 1 1 4),on aborde un chapitre de la Prakaraņapañcikā de Śālikanātha(750-820), où celui-ci discute du mot avyapadeśa « non énonçable » utilisé par ses prédécesseurs. Pour ce trio de penseurs, la question est : est-ce que la perception est l’appréhension d’un objet préalablement à toute nomination ou bien la nomination est-elle indispensable à une perception correcte. Pour les logiciens du nyāya, le mot crée la connaissance de l’objet même sans le modifier matériellement et l’objet n’est pas reconnu sans être énonçable (avyapadeśya) . Selon le penseur Vācaspatimiśra (an mil) avyapadeśya indique que la perception échappe à la sphère conceptuelle et accède aux objets abstraction faite de leurs noms, qu’en d’autres mots, elle opère avec des matériaux extramentaux càd non construits par l’esprit En revanche le grammairien Bhartṛhari déclare que le préconceptuel n’est pas dépourvu de noms et que la connaissance découle du contact objet-sens du mot. Un troisième intervenant prêche pour la combinaison d’un apport extérieur et d’un nom. La même problématique se retrouve chez Jayantabhaṭṭa , au livre 2 de la Nyāyamañjarī, où un débat long et filandreux met aux prises les « Anciens logiciens », les « Maîtres » (Ācārya’s), les « Interprètes » (Vyākhyātṛ’s), un « Adversaire » (Para), un « Autre » (Apara) et « d’Autres » (Anye = les Bouddhistes). Tous ont leur mot à dire dans un débat sans guère de fil conducteur et qui échoue à trancher la question fondamentale : la perception est-elle différente de la sensation ? [less ▲]

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See detailDiagnosis of active acromegaly : is it time to amend the consensus of opinions?
Beckers, Albert ULg; Daly, Adrian ULg; Petrossians, Patrick ULg et al

in International Novartis Workshop - somatostatin and its natural and synthetic analogues - Update from basic to clinical aspects - Abstract book (2005)

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See detailProcessus de qualification du produit « viande bovine » veillant à valoriser les multiples fonctions de l’élevage
Stilmant, Didier; Stassart, Pierre M ULg; Jamar, Daniel

in Actes des Journées de Fourrages Actualités (2005)

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See detailIdentification of the parameters of a damage constitutive law for steel at elevated temperature
Castagne, S.; Habraken, Anne ULg

in Banabic, D. (Ed.) Proceedings of the 8th ESAFORM Conference on Material Forming (2005)

This paper presents the methodology and the results of the calibration of an interface damage law using experimental damage analyses and associated finite element simulations. The experimental damage ... [more ▼]

This paper presents the methodology and the results of the calibration of an interface damage law using experimental damage analyses and associated finite element simulations. The experimental damage analyses consist in acoustic tests realised on steel samples in order to determine the apparition of the first crack during compression. Finite elements simulations of these experiments allow the determination of the damage parameters using a reverse method. [less ▲]

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See detailMatrix metalloprotease in bronchoalveolar lavage from healthy and RAO horses in crisis and in remission.
Art, Tatiana ULg; Kirschvink, Nathalie; de Moffaerts, Brieuc et al

in 3rd World Equine Airways Symposium (WEAS) (2005)

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See detailSelecting concise sets of samples for a reinforcement learning agent
Ernst, Damien ULg

in Proceedings of the 3rd International Conference on Computational Intelligence, Robotics and Autonomous Systems (CIRAS 2005) (2005)

We derive an algorithm for selecting from the set of samples gathered by a reinforcement learning agent interacting with a deterministic environment, a concise set from which the agent can extract a good ... [more ▼]

We derive an algorithm for selecting from the set of samples gathered by a reinforcement learning agent interacting with a deterministic environment, a concise set from which the agent can extract a good policy. The reinforcement learning agent is assumed to extract policies from sets of samples by solving a sequence of standard supervised learning regression problems. To identify concise sets, we adopt a criterion based on an error function defined from the sequence of models produced by the supervised learning algorithm. We evaluate our approach on two-dimensional maze problems and show its good performances when problems are continuous. [less ▲]

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See detailSoft tissue imaging of the palmar aspect of the equine podotrochlear apparatus
Busoni, Valeria ULg; Lahaye, Benoit; Jamar, Marie et al

in Proceedings of IVRA Meeting (2005)

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See detailField scale N-management : soil/plant diagnostic tools applied within the Agricultural surface survey (Belgium)
Courtois, P.; Destain, Jean-Pierre ULg; Goffart, J. P. et al

in N management in agrosystems in relation to the Water Framework directive (2005)

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See detailPaléoémersions : processus sédimentaires et diagénétiques associés
Loisy, Corinne; Da Silva, Anne-Christine ULg; Toullec, Renaud et al

in 10ème congrès français de sédimentologie - livret des résumés (2005)

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See detailProlactinomas
Ciccarelli, A.; Beckers, Albert ULg

in 14th EFES Postgraduate Course in Clinical Endocrinology - Abstract book (2005)

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See detailAfrican rainforest : Evolution and Threats
Doucet, Jean-Louis ULg

in De Dapper, M. (Ed.) Tropical Forest in a Changing Global Context (2005)

According to recent data (GLC2000 map), African dense forests cover c. 236 million ha, that is 7.9 % of the total continent area. The Central African forest is the last contiguous block of tropical forest ... [more ▼]

According to recent data (GLC2000 map), African dense forests cover c. 236 million ha, that is 7.9 % of the total continent area. The Central African forest is the last contiguous block of tropical forest in Africa; it covers an area of c. 203 million ha, whereas the forest cover of West Africa (c. 10 million ha) is highly fragmented. At the fringes of the Congo Basin, forests are replaced by woodlands and shrublands, mixed in some places with croplands. Woodlands and shrublands together cover 27 % of the continent, while grasslands represent 15 % of the land. The largest desert in the world is the Sahara desert that covers an area of c. 900 million ha or 33 % of the African continent. Agricultural activities extend over 12 % of the continent. The area of cropland is more important in West Africa than in Central Africa, respectively 16 % and 7 %. Closely related to agriculture, the deforestation rate is higher in West Africa (1.7 % versus 0.4 %). The other causes of deforestation are logging, mining activities, infrastructure development and fires. The most forested countries of the continent are: Central African Republic (c. 8 million ha), Gabon (c. 21 million ha), Cameroon (c. 21 million ha), Congo (c. 26 million ha) and D. R. Congo (c. 125 million ha). These five countries account for 85 % of the African dense forest. In Central Africa, 45 % of the total forest area is under a logging concession status. As a consequence, logging activities play a major role in the Central African rainforest’s future. According to the ITTO (International Tropical Timber Organization) figures, in 2003 the estimated productions of the five previously mentioned countries were: c. 7.4 million m3 of logs; c. 1.1 million m3 of sawn wood; c. 380,000 m3 of plywood and veneer, that is less than 1 % of the world production. Logging in Central Africa is characterized by its high selectivity. For economic reasons, only a few species are commercialized. Usually only one to two trees are felled per hectare and the cover disturbance is about 10 %. The most felled species can be grouped in two categories: hygrophilous evergreen rain forest species and moist semi-evergreen rain forest species. The first category is mainly composed of azobe Lophira alata, beli Julbernardia pellegriniana, douka Tieghemella africana, kevazingo Guibourtia spp., okoume Aucoumea klaineana, pachyloba Afzelia pachyloba, tali Erythrophleum ivorense. The second category is made up of afromosia Pericopsis elata, agba Prioria balsamifera, ayous Triplochyton scleroxylon, dibetou Lovoa trichiloides, frake Terminalia superba, iroko Milicia excelsa, kossipo Entandrophragma candollei, moabi Baillonella toxisperma, movingui Distemonanthus benthamianus, padouk Pterocarpus soyauxii, sapelli Entandrophragma cylindricum, sipo Entandrophragma utile. The major forest companies in the region are mostly subsidiaries of larger European firms (French, German, etc.) although Asian business is becoming more and more important. Obliged by the recent evolution of the Central African forestry laws, some of these logging companies are conceiving forest management plans. The management methods currently implemented were developed as normative regulations issued under the forest laws in the region. The basis of these methods is a statistical inventory of the resources which allows the determination of the population structures, i.e. the number of stems per diameter class. Considering increment and mortality, rotation and/or minimum felling diameters are adapted to reach a satisfactory reconstitution rate. Unfortunately, undamental knowledge about the species population dynamic parameters is still lacking and finally the precision on the rate of reconstitution after a cutting cycle is jeopardized. Moreover, these methods do not pay any attention to long-term preservation of the logged species, since species could have a satisfactory level of reconstitution after one rotation, but could disappear after a second cycle. For such species specific interventions are needed to improve their natural regeneration capacities. In this paper, examples are given for a 176,000 ha management unit in Cameroon for flagship species: assamela Pericopsis elata, ayous Triplochyton scleroxylon, iroko Milicia excelsa, moabi Baillonella toxisperma, sapelli Entandrophragma cylindricum and tali Erythrophleum ivorense. The obtained results attest the need to implement sylvicultural techniques in order to maintain the production capacity of the African rain forests, this production capacity being the best guarantee for the preservation of their integrity. [less ▲]

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See detailSex, gender und Altersdiskurs in Thomas Manns „Die Betrogene“: Peinliches Begehren
Pontzen, Alexandra ULg

in Bidwell-Steiner; Wozonig, Karin S. (Eds.) Gender & Generation. Gendered Subjects. (2005)

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See detailVariability of cotton diploid species SSR amplification in interspecific hybrids
Konan, N.O; Baudoin, Jean-Pierre ULg; Ben Bouza, H et al

in Proceedings of the plant & Animal Genome Conference XIII (2005)

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See detailMECOSIG Adapted to the Design of Distributed GIS
Pasquasy, Fabien; Laplanche, François; Sainte, Jean-Christophe et al

in OTM 2005 Workshops (2005)

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See detailTraitement des problèmes du système respiratoire profond
Art, Tatiana ULg; Lekeux, Pierre ULg

in Proceedings: 9th Congress on Equine Medicine and Surgery (2005)

Lower respiratory troubles in mature sports horses mainly include viral diseases (influenza, rhinopneumonia) ; bacterial diseases (that are generally due to commensal bacteria invading the lower ... [more ▼]

Lower respiratory troubles in mature sports horses mainly include viral diseases (influenza, rhinopneumonia) ; bacterial diseases (that are generally due to commensal bacteria invading the lower respiratory tract because of an impairment of the pulmonaty defences); inflammatory processes (mainly in horses suffering from heaves and inflammatory airway disease) and exercise-induced pulmonary haemorrhages. Dysfunction such as hypersecretion of mucus, bronchospasms, bronchial hypereactivity and oedema may complicate any of this diseases. Treatments focusing on the etiological agents (anti-viral therapy, modulation of immunity, and antibiotic therapy), on the associated symptoms (anti-inflammatory, bronchodilators, regulator of the muco-ciliary clearance) and on the nursing and general management (rest and environmental hygiene) are described in this review [less ▲]

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See detailMéthode graphique d'optimisation de la consommation de chauffage et du risque de surchauffe : application à une maison presque passive
Hauglustaine, Jean-Marie ULg; Michaelis, L.

in Passiefhuis-Platform (Ed.) Passiefhuis Happening PHH 2005 (2005)

The needs for a building in energy of heating depend on the degree on thermo isolation on its envelope, of its air tightness, the needs for ventilation and its opening to the solar contributions, all ... [more ▼]

The needs for a building in energy of heating depend on the degree on thermo isolation on its envelope, of its air tightness, the needs for ventilation and its opening to the solar contributions, all parameters which the architect must control to optimize his project. This assessment can be visualized graphically on an abacus, and that simultaneously with the risk of overheating in summer. Paper thus locates the stakes continued by the step of the passive house, in general: to minimize the losses by the envelope, to manage the needs for ventilation and to maximize the solar contributions do not prevent from avoiding the overheating of summer. Passive house JOHANNS built in Kettenis (Eupen) by the architect Leo MICHAËLIS is then presented: project, building site and heat balance. [less ▲]

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See detailElectrical mapping of spontaneous ventricular fibrillation in acutely ischemic pigs.
Desaive, Thomas ULg; Janssen, Nathalie; Péters, Fabrise et al

in Proceedings of the 5th Belgian Day on Biomedical Engineering, 2005, Brussels (2005)

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See detailEvaluation d'un cours en ligne : produit, usage et impact.
Georges, François ULg; Van de Poël, Jean-François ULg

in L'enseignement supérieur du XXIe siècle : de nouveaux défis à relever (2005)

Depuis 1999, le Laboratoire de Soutien à l’Enseignement Télématique accompagne des enseignants du supérieur et des formateurs d’adultes dans la mise en ligne de leur cours. Cet accompagnement a été et est ... [more ▼]

Depuis 1999, le Laboratoire de Soutien à l’Enseignement Télématique accompagne des enseignants du supérieur et des formateurs d’adultes dans la mise en ligne de leur cours. Cet accompagnement a été et est réalisé dans le cadre de projets subventionnés par la Région wallonne, la Communauté française et la Commission européenne. Une centaine de cours a été ainsi, en partie ou totalement, mise à distance. Les évaluations ont porté les premières années sur des critères davantage techniques et ergonomiques. Au fur et à mesure de notre expérience, nous nous sommes recentrés sur des critères purement d’ordre pédagogique ou tout au moins au service de l’apprentissage. Si au départ l’évaluation portait exclusivement sur un produit fini, elle tend au cours des années à s’instaurer dès la conception de l’outil et à porter donc également sur le processus (Dupont et Poumay, 2004). [less ▲]

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See detailIdentification of elastic orthotropic material parameters by inverse modeling using ESPI
Lecompte, D.; Sol, H.; Vantomme, J. et al

in Proceedings of the 2005 SEM Annual Conference & Exposition on Experimental and Applied Mechanics (2005)

Parameter identification methods, which integrate optimization techniques and numerical methods such as the finite element method (FEM), offer an alternative tool for material characterisation. The most ... [more ▼]

Parameter identification methods, which integrate optimization techniques and numerical methods such as the finite element method (FEM), offer an alternative tool for material characterisation. The most common approach is to determine the optimal estimates of the model parameters by minimizing a selected measure-of-fit between the responses of the system and the model. The possibility is studied of retrieving the four independent elastic engineering constants for an orthotropic medium, based on the measurement of a heterogeneous displacement field. In the present case a tensile test is performed on a perforated specimen. The responses of the system, i.e. the surface displacements are measured with an Electronic Speckle Pattern Interferometer. Strains are subsequently calculated, based on the measured displacement field. A finite element model of the perforated specimen is made. The difference between the experimental and numerical strains is minimized in a least squares sense by updating the values of the parameters. The obtained material (or model) parameters are very well in agreement with the traditionally determined ones. [less ▲]

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See detailGenetic predictors of asthma exacerbations among children in the childhood asthma management program
Celedon, J. C.; Van Steen, Kristel ULg; Lange, C. et al

in Conference Abstract Book (2005)

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See detailLarge strain elasto/viscoplastic constitutive model. Theory and numerical scheme
Ponthot, Jean-Philippe ULg; GARCIA-GARINO, C.; MIRASSO, A.

in MECOM 2005, Mecanica Computational (2005)

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See detailIndirect defence of aphid infested potato : role of terpenes on Episyrphus balteatus behaviour
Francis, Frédéric ULg; Harmel, Nicolas; Almohamad, Raki et al

in Abstract book (2005)

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See detailLandslide risk analysis in the Mailuu-Suu valley (Kyrgyzstan) by means of remote sensing techniques
Danneels, Gaelle; Pirard, Eric ULg; Torgoev, Isakbek et al

in Geophysical Research Abstracts (2005)

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See detailGenomic screening and replication in one data set in family-based association testing
Lange, C.; Van Steen, Kristel ULg; McQueen, M. et al

in Conference Abstract Book (2005)

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See detailHigher order sigma-delta modulators interfaces for capacitive sensors (Invited)
Kraft, Michael ULg

in The IEE Seminar and Exhibition on MEMS Sensor Technologies (2005)

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See detailNumerical modelling with Wolf2D of the sedimentation problem at the entrance of a lock on the river Meuse
Khuat Duy, Bruno ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Dick, Erik; Hogge, Michel; Van Keer, Roger (Eds.) Proceedings of the 3rd International Conference on Advanced Computational Methods in Engineering (2005)

This paper presents the resolution of a practical hydraulic engineering problem thanks to effective numerical tools. A sedimentation study of the lock of Hun (river Meuse, Belgium) is completed using ... [more ▼]

This paper presents the resolution of a practical hydraulic engineering problem thanks to effective numerical tools. A sedimentation study of the lock of Hun (river Meuse, Belgium) is completed using solid transport models integrated in a finite volume free surface flows solver. The silting of the lock entrance is successfully modelled and various layout modifications of the site are tested to predict their effects and to see to what extent they could improve the actual situation. The analysis of the results shows that a regular dredging of the lock entrance is ineluctable. [less ▲]

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See detailDevelopment of new assessment tools for attentional and executive functioning in children
Catale, Corinne ULg; Meulemans, Thierry ULg

in Books of Conference Abstract: The 8th European Conference on Psychological Assessment, (2005)

In developmental neuropsychology, attentional and executive impairments are commonly reported following acquired neurological/developmental disorders such as Traumatic Brain Injury (TBI), epilepsy, ADHD… ... [more ▼]

In developmental neuropsychology, attentional and executive impairments are commonly reported following acquired neurological/developmental disorders such as Traumatic Brain Injury (TBI), epilepsy, ADHD… Unfortunately, most of attentional tests used in child neuropsychology were originally developed for adults and are of limited interest for children (notably because of their lack of attractiveness or because they require some non-developed skills). From a cognitive perspective, it is therefore often difficult to interpret the results obtained with such tools in children. The aim of this study was to develop assessment tasks of attentional/executive functioning which are more attractive (by using colored/familiar stimuli) and more theoretically relevant for young children. The tasks are based on Posner’s attentional model, which includes selective and sustained attention, attentional shifting and cognitive inhibition. Eighty children aged from 5 to 11 with no developmental/neurological deficits were administered tasks assessing visual selective attention (selecting a specific character among distractors), sustained attention (crossing dinosaurs in 5 minutes), flexibility (shifting between name and colour of stimuli), and inhibition (naming the real colour of a red banana or a yellow strawberry). Results confirmed the interest of these tasks in the assessment of attentional functioning in children, thanks to both their limited duration of administration and the stimuli’s attractiveness. Furthermore, results showed that tasks are sensitive to attentional development from 5 to 11 years old (p < .05). Finally, a preliminary study showed that some tasks can be particularly sensitive to attentional disorders in a clinical population of TBI children. [less ▲]

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See detailModelling suspended load transport with linear concentration profiles
Khuat Duy, Bruno ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Proceedings of the 8th International Conference on Fluvial Sedimentology (2005)

In numerical simulations, it is always necessary to find an optimum between the simplicity of the model and a good representation of real phenomena. In the field of hydraulic flows simulations, the models ... [more ▼]

In numerical simulations, it is always necessary to find an optimum between the simplicity of the model and a good representation of real phenomena. In the field of hydraulic flows simulations, the models using depth-averaged and moment equations are an interesting compromise between full 3D and simple depth-averaged models. This paper presents the use of a moment equation for suspended load transport. A simple but representative model for the sediment concentration profiles is developed. This original bi-linear concentration profile is compared to the traditional Rouse-profiles and shows a good correspondence despite its great simplicity. Advective and diffusive sediment fluxes are developed analytically and lead to a concise formulation, which is an asset for practical use. A differential equation for the sediment concentration moment is also fully developed, and a special attention is cast to the source term. The finite volume scheme has been chosen to implement the model, because it is particularly well suited for highly advective transport equations, it is conservative and it makes the choice of the upwinding easier. 1D simulations show the capacity of the model to reproduce laboratory experiments described in the literature. [less ▲]

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See detailAccounting for coherence in wind forces in finite element models
Denoël, Vincent ULg

in Proceedings of the Eurodyn 2005 Conference (2005)

The behaviour of civil engineering structures subjected to wind forces is generally approached by means of finite element models. These numerical models are necessary since the shape of the structure as ... [more ▼]

The behaviour of civil engineering structures subjected to wind forces is generally approached by means of finite element models. These numerical models are necessary since the shape of the structure as well as the representation of the applied forces are difficult to handle in closed forms. In stochastic dynamic analyses, the coherence of the applied forces – in this context coming from the wind flow – is represented by the off-diagonal terms in the power spectral density matrix. This matrix is obtained by assembling elementary matrices, each of them corresponding to a stochastically loaded finite element. Even though the unique rigorous approach is not so complicated, simplified formulations are generally used to set up these elementary matrices. These simplifications result in a bad estimation of the high frequency content of the applied forces. Comparing these approached power spectral density’s to the actual ones enables to determine numerical admittance functions which allow correcting the bad estimation of the forces. This paper presents several finite element formulations for the estimation of the applied forces and derives the corresponding expressions of the numerical admittance functions. [less ▲]

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See detailModelling suspended load with moment equations and linear concentration profiles
Khuat Duy, Bruno ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Raghay, S.; Ouazar, D.; Benkhaldoun, F. (Eds.) Finite volumes for complex applications (2005)

In numerical simulations, it is always necessary to find an optimum between the simplicity of the model and a good representation of real phenomena. In the field of hydraulic flows simulations, the models ... [more ▼]

In numerical simulations, it is always necessary to find an optimum between the simplicity of the model and a good representation of real phenomena. In the field of hydraulic flows simulations, the models using depth-averaged and moment equations are an interesting compromise between full 3D and simple depth-averaged models. This paper presents the use of a moment equation for suspended load transport. A simple but representative model for the sediment concentration profiles is developed. This original bi-linear concentration profile is compared to the traditional Rouse-profiles and shows a good correspondence despite its great simplicity. Advective and diffusive sediment fluxes are developed analytically and lead to a concise formulation, which is an asset for practical use. A differential equation for the sediment concentration moment is also fully developed, and a special attention is cast to the source term. The finite volume scheme has been chosen to implement the model, because it is particularly well suited for highly advective transport equations, it is conservative and it makes the choice of the upwinding easier. 1D simulations show the capacity of the model to reproduce laboratory experiments described in the literature. [less ▲]

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See detailConfrontation of magnetic susceptibility and sequence stratigraphy as correlation techniques
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

in Abstract book - 24th IAS meeting, Muscat, Oman (2005)

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See detailL’épisode de Clarisse et Esmerée dans le Roman en prose de Guillaume d'Orange
Henrard, Nadine ULg

in Cazanave, Caroline (Ed.) Actes du Colloque "L'épique médiéval et le mélange des genres”, Besançon, 3-5 octobre 2002 (2005)

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See detailDesign and performances of the heliospheric imager for the STEREO mission
Mazy, Emmanuel ULg; Halain, Jean-Philippe ULg; Defise, Jean-Marc ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2005)

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2006. Located on two different orbits, the two HI instruments will provide ... [more ▼]

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2006. Located on two different orbits, the two HI instruments will provide stereographic images of solar coronal plasma and coronal mass ejections (CME) over a wide field of view (~90°), ranging from 13 to 330 solar radii (R[SUB]0[/SUB]). These observations complete the 15 R[SUB]0[/SUB] field of view of the solar corona obtained with the other SECCHI instruments (2 coronagraphs and an EUV imager). The HI instrument is a combination of 2 refractive optical systems with 2 different multi-vanes baffle system. The key challenge of the instrument design is the rejection of the solar disk light, with total straylight attenuation of the order of 10[SUP]-13[/SUP] to 10[SUP]-15[/SUP]. The optics and baffles have been specifically designed to reach the required rejection. This paper presents the SECCHI/HI opto-mechanical design, with the achieved performances. A test program has been run on one flight unit, including vacuum straylight verification test, thermo-optical performance test and co-alignment test. The results are presented and compared with the initial specifications. [less ▲]

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See detailSelective inhibition of AP-1 activity in airway immune cells ameliorates experimental asthma
Desmet, Christophe ULg; Gosset, P.; Garzé, V. et al

in Proceedings: The American Thoracic Society (2005)

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See detailLinking biochemical and biophysical variables derived from imaging spectrometers to ecological models: the HYECO’04 group shoot.
Kooistra, L; Clevers, J; Schaepman, M et al

in Linking biochemical and biophysical variables derived from imaging spectrometers to ecological models: the HYECO’04 group shoot. (2005)

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See detailOptimisation of hydroelectric power stations operations with WOLF package
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Repp, K.; Westeren, T.; Sandlund, O. T. (Eds.) et al Proceedings of the 5th International Conference on Hydropower - The backbone of sustainable energy supply (2005)

For years, original free-surface flow solvers have been developed and continuously improved by the Laboratory of Applied Hydrodynamics and Hydraulic Constructions (HACH) at the University of Liège. The ... [more ▼]

For years, original free-surface flow solvers have been developed and continuously improved by the Laboratory of Applied Hydrodynamics and Hydraulic Constructions (HACH) at the University of Liège. The resulting fully integrated WOLF computation package allows engineers to accurately study a very wide range of various free surface flows, from hydrological runoff (WOLF HYDRO) and river propagation (WOLF 1D) to extreme erosive flows on realistic mobile topography (WOLF 2D), such as gradual dam breaching processes. All the finite volume models, process oriented, use efficient and original numerical methods to solve free surface flows equations. Each code handles general multiblock meshes, dealing with natural topography, dry and wet cells and mobile bed simultaneously, for any unsteady situation with mixed regimes and moving hydraulic jumps. The interactive and unique user-interface, with high performance pre- and post-processing, allows monitoring 3-D large-scale runs graphically while they proceed, as well as generating 3D videos. In addition, powerful optimisation capabilities based on the Genetic Algorithms technique (WOLF AG) are implemented within WOLF, interconnecting all the package components. An efficient tool is thus available to calibrate physical parameters in any of the models and to manage any problem of optimisation with the different solvers. In this paper, the numerical optimisation process of the system of hydroelectric power stations installed on a 60 km long section of the rivers Amblève and Warche in Belgium is presented in detail. The river network is modelled in quasi-2D using real natural topographic data on almost 1,100 finite volumes. In a first step, the hydrological balance is closed using the solver WOLF HYDRO. Roughness coefficients are calibrated from water level and discharge field measurements. Secondly, the hydroelectric production is maximised by an automatic calibration of the parameters of the hydrograph released in the network at the upstream dam. This approach leads to a substantial gain in hydroelectric production, brings significant financial benefits and deals with all management and security criteria of the river network. [less ▲]

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See detailBeyond deforestation: use of landscape metrics and satellite imagery to analyze tropical forest fragmentation.
Colson, F; Shimabukuro, Y E; Bogaert, Jan ULg

in Proceedings of: Forestsat 2005, workshop on operational tools in forestry using remote sensing techniques. (2005)

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See detailFailure of a Tied-Arch Bridge Submitted to a Severe Localized Fire
Dotreppe, Jean-Claude ULg; Majkut, S.; Franssen, Jean-Marc ULg

in Proceedings of the IABSE Symposium Lisbon (2005)

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See detailBelgium stranding network
Jauniaux, Thierry ULg; Das, Krishna ULg; Brenez, C. et al

in annual proceeding (2005)

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See detailSTAT5 promotes granulocyte survival during inflammation
Fievez, Laurence ULg; Desmet, Christophe ULg; Seumois, G. et al

in Proceedings: The American Thoracic Society (2005)

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See detailDu numérique à l’analyse : Étude d’une situation d’apprentissage de la notion de limite à la charnière secondaire-université
Job, Pierre ULg; Gilot, Marguerite ULg

in Actes de la XIII ème École d’été de didactique de mathématiques (2005)

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See detailUne langue de référence pour développer le plurilinguisme
Lucchini, Silvia ULg; Flamini, Fiorella

in Witte, E.; Van Mensel, L.; Pierrard, M. (Eds.) et al Language, Attitudes and Education in Multilingual Cities (2005)

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See detailCombining lazy learning, racing and subsampling for effective feature selection
Bontempi, Gianluca; Birattari, Mauro; Meyer, Patrick ULg

in Adaptive and Natural Computing Algorithms (2005)

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See detailProductions animales dans les pays en développement et relations nord-sud.
Buldgen, André; Bindelle, Jérôme ULg; Lebailly, Philippe ULg

in Xème Carrefour des Productions Animales (2005)

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See detailResistance of joints submitted to combined axial force and bending
Cerfontaine, F.; Jaspart, Jean-Pierre ULg

in Proceedings of the 2005 Eurosteel Conference on Steel and Composite Structures (2005)

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See detailRobustness of Planar Shape Descriptors of Particles
Pirard, Eric ULg; Dislaire, Godefroid

in Chung, C.-F. (Ed.) Proceedings Mathematical Geology Congress (2005)

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See detailLinking biochemical and biophysical variables derived from imaging spectrometers to ecological models - The HyEco'04 Group Shoot.
Kooistra, L; Clevers, J; Schaepman, M et al

in Zagajewski, B; Sobczak, M; Wrzesien, M (Eds.) New Quality in Environmental Studies. Proceedings of 4th EARSeL Workshop on Imaging Spectroscopy (2005)

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See detailRelationship between leptin and adiposity in three cattle breeds
Daix, Marie; Pirotte, Cécile; Bister, Jean-Loup et al

in Acta Physiologica 2005; Volume 185 (2005)

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See detailFinite element simulations of the swift effect
Duchene, Laurent ULg; El Houdaigui, Fouad; Habraken, Anne ULg

in Bariani, P. F. (Ed.) Proceedings of the ICTP 2005 International Conference on Technology of Plasticity (2005)

Numerical simulations of the experimental free-end torsion tests [1] of copper cylindrical bars were analysed in the present paper. The self-made Finite Element (FE) code Lagamine with polycrystal ... [more ▼]

Numerical simulations of the experimental free-end torsion tests [1] of copper cylindrical bars were analysed in the present paper. The self-made Finite Element (FE) code Lagamine with polycrystal plasticity models computed numerical prediction of the Swift effect, i.e. the lengthening of the cylinder during the torsion. The used constitutive law was coupled with two plastic crystal models, taking or not into account strain rate effect. Results such as axial strain and predicted textures were analysed. The ones obtained for shear strains lower than 1.0 were in good agreement with experiments; while, for shear strains larger than 1.0, the FE results were currently unfair. A research about remeshing is in progress to improve the accuracy of the results for large shear strains. [less ▲]

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See detailFaudrait-il donc se résoudre à réparer les dégâts ?
Guillaume, Jean-François ULg

in Pelleriaux, Koen (Ed.) Vivre ensemble ? Pistes de réflexion pour une accessibilité des associations de jeunesse en Flandre, à Bruxelles et en Wallonie (2005)

Dans la sphère des activités d’éducation et d’encadrement de la jeunesse, l’école et la famille ont longtemps occupé une position prépondérante. Mais leur place et leur rôle se sont considérablement ... [more ▼]

Dans la sphère des activités d’éducation et d’encadrement de la jeunesse, l’école et la famille ont longtemps occupé une position prépondérante. Mais leur place et leur rôle se sont considérablement modifiés avec les changements survenus dans l’organisation politique des sociétés et dans les échanges intergénérationnels. L’affaiblissement des programmes éducatifs « traditionnels » contribue à remodeler les frontières entre les différents acteurs institutionnels et à susciter de nouvelles attentes à leur égard. Dans ce contexte, quelles questions peuvent aider à orienter l’action des associations de jeunesse ? [less ▲]

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See detailAssessing a river floodplain status using airborne imaging spectrometer data and ground validation – The HyEco'04 project
Kooistra, L; Batelaan, O; Clevers, J et al

in Abstract for Third Airborne Imaging Spectroscopy Workshop in Bruges (2005)

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See detailProductions lamellaires aurignaciennes à l'est des Carpates
Noiret, Pierre ULg

in Le Brun-Ricalens, Foni (Ed.) Productions lamellaires attribuées à l'Aurignacien. Chaînes opératoires et perspectives technoculturelles (2005)

The lithic assemblages of Siuren I (Ukraine) suggest that two successive phases can be distinguished in the Krems-Dufour facies of the Aurignacian in Eastern Europe (Demidenko et al.). The assemblages of ... [more ▼]

The lithic assemblages of Siuren I (Ukraine) suggest that two successive phases can be distinguished in the Krems-Dufour facies of the Aurignacian in Eastern Europe (Demidenko et al.). The assemblages of Kostenki 1 (Russia) and Mitoc-Malu Galben (Romania) do not contradict this distinction and show the functionnal role of the sites in the representation of lamellar products. [less ▲]

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See detailThe Belgian (saproxylic) elateriodea fauna in danger ? : a study in deciduous forests in southern Belgium
Versteirt, Veerle; Fayt, Philippe; Hastir, Pierre et al

in Barclay; Telnov (Eds.) Proceedings of the 3rd symposium and workshop on the conservation of saproxylic beetles (2005)

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See detailUne Vierge guerrière au service des Habsbourg et de l’Église catholique
Delfosse, Annick ULg

in Bethouart, Bruno; Lottin, Alain (Eds.) La dévotion mariale de l’an Mil à nos jours (2005)

First study about a little known Marian function: the Virgin as a powerful and armed warrior, supporting the catholic troops.

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See detailLa mise en oeuvre de réseaux écologiques en Wallonie
Dufrêne, Marc ULg

in Lumaret, J.-P.; Jaulin, S.; Soldati, F. (Eds.) et al Conservation de la biodiversité dans les paysages ruraux européens (2005)

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See detailLa dévotion mariale, facteur d’identification dans les Pays-Bas espagnols
Delfosse, Annick ULg

in Cottret, M.; Belissa, M.; Belavitis, A. (Eds.) Identités, appartenances, revendications identitaires (XVIe-XVIIIe siècle) (2005)

The author studies the use of the Marian worship as an identitary factor in the Catholic Low Countries (end 16th- 17th c.). She shows how, in a stormy military context, this symbolical character served as ... [more ▼]

The author studies the use of the Marian worship as an identitary factor in the Catholic Low Countries (end 16th- 17th c.). She shows how, in a stormy military context, this symbolical character served as a principle of fusion, favouring the unity of the group and carrying therefore the individual to conform himself with common values i.e. fidelity to the reformed Catholicism and loyalty to the Habsburg authority. [less ▲]

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See detailModel identification and FE simulations: effect of different yield loci and hardening laws in sheet forming
Flores, Paulo; Duchene, Laurent ULg; Lelotte, Thomas et al

in Smith, L. M.; Pourboghrat, F.; Yoon, J. W. (Eds.) et al On the Cutting Edge of Technology NUMISHEET 2005, Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (2005)

The bi-axial experimental equipment [1] developed by Flores enables to perform Baushinger shear tests and successive or simultaneous simple shear tests and plane-strain tests. Such experiments and ... [more ▼]

The bi-axial experimental equipment [1] developed by Flores enables to perform Baushinger shear tests and successive or simultaneous simple shear tests and plane-strain tests. Such experiments and classical tensile tests investigate the material behavior in order to identify the yield locus and the hardening models. With tests performed on two steel grades, the methods applied to identify classical yield surfaces such as Hill or Hosford ones as well as isotropic Swift type hardening or kinematic Armstrong–Frederick hardening models are explained. Comparison with the Taylor-Bishop-Hill yield locus is also provided. The effect of both yield locus and hardening model choice will be presented for two applications: Single Point Incremental Forming (SPIF) and a cup deep drawing. [less ▲]

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See detailUtilisation des Points d'Intérêts Couleurs pour le Suivi d'Objets
Gabriel, Pierre; Hayet, Jean-Bernard; Piater, Justus ULg et al

in Actes du Congrès ORASIS (2005)

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See detailLa littérature francophone de Belgique. Périphérie et autonomie
Denis, Benoît ULg

in Durand, Pascal; Winkin, Yves; Dubois, Jacques (Eds.) Le Symbolique et le Social. La réception internationale de la pensée de Pierre Bourdieu (2005)

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See detailStudy of liquid fraction evolution of semi-solid steels for thixoforming
Lecomte-Beckers, Jacqueline ULg; Rassili, Ahmed ULg; Carton, Marc ULg et al

in Proceedings of the 8th ESAFORM Conference on Material Forming (2005)

Major challenge for semi-solid processing includes broadening the range of alloys that can be successfully thixoformed and developing alloys specifically for thixoforming. One important parameter is ... [more ▼]

Major challenge for semi-solid processing includes broadening the range of alloys that can be successfully thixoformed and developing alloys specifically for thixoforming. One important parameter is appropriate solidus-liquidus interval. The wider the solidification interval, the wider the processing window. This study is related to the experimental determination of this critical parameter on eight different steel compositions. This parameter was obtained using Differential Scanning Calorimetry. This technique allows to obtain the solid fraction versus temperature. [less ▲]

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See detailEngagement littéraire et morale de la littérature. Sartre et Bataille lecteurs de Baudelaire et Genet
Denis, Benoît ULg

in Bouju, Emmanuel (Ed.) L’engagement littéraire (2005)

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