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

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

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

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

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See detailFluid - structure interaction modeling with a coupled 1D - 2D free surface flow solver
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of Riverflow 2006 (2006)

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic ... [more ▼]

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic structure design and fluid-structure interaction, additional developments have been implemented in the finite volume 2D model to deal with boundaries not aligned along axis or with moving structures. The cut cell based approach, simpler than other classical methods, is based on the division with a sub-grid of the initial Cartesian meshes. While keeping the advantages of regular grids in terms of simplicity, accuracy and storage capacity, it enables to compute instantaneous effects of a structure movement on the fluid or to deal with complex boundaries inclined compared to mesh axis. Several test cases are presented, as well as an applica-tion of the enhanced model, coupled with a 1D one, to the computation of the hydrodynamic fields induced by a lock-door movement. [less ▲]

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See detailObesity : epidemiology, pathophysiology and management of the obese dog
Diez, Marianne ULg; Nguyen, Patrick

in Pibot, Pascale; Biourge, Vincent; Elliott, Denise (Eds.) Encyclopedia of Canine Clinical Nutrition (2006)

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See detailUsing Cellular automata for the analysis of the dynamics of a landscape unit: discussions about the study of a suburban area in the East of Liège
Schmitz, Serge ULg; Schepers, Jean-François

in European rural future: landscape as an interface : Berlin/Brandenburg, 4-9 Septembre 2006 (2006)

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See detailValeurs, identités et capital social : Paradigmes antagonistes ou approches convergentes pour une intelligence de la société wallonne ?
Heselmans, Frédéric ULg

in Fédéralisme - Régionalisme (2006), 6

Ce bref article a pour objectif, sur la base d’une enquête empirique portant sur la société wallonne, de confronter les résultats d’analyses mêlant trois approches appartenant à des paradigmes ou courants ... [more ▼]

Ce bref article a pour objectif, sur la base d’une enquête empirique portant sur la société wallonne, de confronter les résultats d’analyses mêlant trois approches appartenant à des paradigmes ou courants épistémologiques réputés distincts (valeurs, identités et capital social) et d’en analyser les convergences ou divergences [less ▲]

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See detailConseils pour une meilleure prescription medicamenteuse.
Scheen, André ULg; Parada, Alberto; Giet, Didier ULg

in Revue Médicale de Liège (2006), 61(5-6), 488-93

The prescription of a pharmacological agent concludes most medical visits. The rational basis of drug prescription by the physician relies on numerous pharmacodynamic, pharmacokinetic, pragmatic and ... [more ▼]

The prescription of a pharmacological agent concludes most medical visits. The rational basis of drug prescription by the physician relies on numerous pharmacodynamic, pharmacokinetic, pragmatic and economic considerations. However, it is a pity to notice that one patient out of two does not strictly follow the pharmacological treatment as it was prescribed. This article analyses some problems of the patient-doctor relationship, which may reduce medication compliance, and provides practical advice for improving such a situation in order to enhance both efficacy and safety of drug prescribing. [less ▲]

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See detailThe use of nimesulide and its analogues in cancer chemoprevention
Renard, Jean-François ULg; Julémont, F.; De Leval, X. et al

in Anti-Cancer Agents in Medicinal Chemistry (2006), 6

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See detailTraducir teorías
Willson, Patricia ULg; Tursi, Antonio; Mársico, Griselda et al

in Jornadas sobre la traducción literaria y filosófica, 12-15 de julio de 2005 (2006)

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See detailTemporal shift of diet in alternative cannibalistic morphs of the tiger salamander
Denoël, Mathieu ULg; Whiteman, Howard H.; Wissinger, Scott A.

in Biological Journal of the Linnean Society (2006), 89(2), 373-382

Evolutionary theory predicts that alternative trophic morphologies are adaptive because they allow a broad use of resources in heterogeneous environments. The development of a cannibal morphology is ... [more ▼]

Evolutionary theory predicts that alternative trophic morphologies are adaptive because they allow a broad use of resources in heterogeneous environments. The development of a cannibal morphology is expected to result in cannibalism and high individual fitness, but conflicting results show that the situation is more complex. The goal of the present study was to increase our understanding of the ultimate benefits of a cannibalistic polyphenism by determining temporal changes in the feeding habits and biomass intake in a population of tiger salamanders (Ambystoma tigrinum nebulosum). Cannibals in this species develop a larger head than typicals and have prominent teeth, both useful for consuming large prey. Although cannibalism was only detected in cannibal morphs, large temporal variation in resource partitioning was found between morphs. The two morphs always differed in their foraging habits, but cannibalism mainly occurred immediately after the ontogenetic divergence between morphs. Cannibals shifted their foraging later to a more planktivorous diet (i.e. the primarily prey of the typical morph). Cannibals also obtained more prey biomass than typicals. These results indicate that the cannibalistic morph is advantageous over the typical development, but that these advantages vary ontogenetically. Although the results obtained are consistent with models predicting the maintenance of cannibalism polyphenism in natural populations, they show that the foraging tactics utilized by cannibal morphs, and the fitness consequences accrued by such tactics, are likely to be more complex and dynamic than previous studies have suggested. (c) 2006 The Linnean Society of London. [less ▲]

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See detailProlactine triggers a pro-inflamatory response in bovine mammary epithelial cells
Boutet, Philippe ULg; Sulon, Joseph; Detilleux, Johann ULg et al

in Proceedings: 24th World Buiatrics Congress (2006)

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See detailApport de la granulométrie laser dans la caractérisation physique des fillers calcaires
Michel, Frédéric ULg; Courard, Luc ULg

in Arliguie, Ginette (Ed.) Compte-rendu des Journées Scientifiques du (RF)2B (2006)

On assiste actuellement en Belgique à une baisse importante de la production des matériaux habituellement employés comme additions dans les composites à matrice cimentaire (cendres volantes, laitier de ... [more ▼]

On assiste actuellement en Belgique à une baisse importante de la production des matériaux habituellement employés comme additions dans les composites à matrice cimentaire (cendres volantes, laitier de haut fourneau). Pour faire face à ce problème, un vaste programme de recherche a été mis sur pied dans le but d’évaluer le potentiel de valorisation de fillers calcaires, de production wallonne, dans ce secteur. Ce papier traite des techniques utilisées pour caractériser de manière physique les fillers calcaires. Une étude paramétrique a permis de définir les conditions optimales de mesure de leur granulométrie par diffraction laser. Les résultats ont été comparés à ceux obtenus par la technique plus classique de tamisage en voie humide. La surface spécifique des poudres a également été mesurée par adsorption d’azote (méthode BET), par perméabilité (Blaine) et calculée à partir des résultats de la diffraction, via le diamètre de Sauter. [less ▲]

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See detailPhotography as diagnosis of contemporaneity
Dondero, Maria Giulia ULg

in Baetens, Jan; Van Gelder, Hilde (Eds.) Critical Realism in Contemporary Art. Around Allan Sekula’s Photography (2006)

Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du travail. L’image ... [more ▼]

Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du travail. L’image photographique devient une ressource dans les mains des acteurs sociaux et fait fonction de diagnostic des tensions du contemporain. La photographie permet de «reconnaître à travers» (c’est-à-dire « diagnostiquer ») et de formuler des jugements. Le potentiel sémantique du diagnostic engendré par cette série et la force illocutoire des jugements qui y sont inscrits fonctionnent comme une sorte d’« argumentation par images ». L’analyse de cette série photographique, réalisée par le photographe et théoricien Allan Sekula, nous a amené à nous interroger sur la relation entre image, corpus, genres d’afférence et statuts (documentaire et artistique). [less ▲]

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See detailStrategy for the qualitative and quantitative analysis of crop syrup containing enzymatically produced Isomaltooligosaccharides known as emerging prebiotics
Goffin, Dorothée ULg; Blecker, Christophe ULg; Wathelet, Bernard ULg et al

Poster (2006)

Isomaltooligosaccharides (IMOs) are non-digestible oligosaccharides, considered as prebiotics and therefore aim to selectively feed probiotics indigenous to the human colon. Recent data obtained in human ... [more ▼]

Isomaltooligosaccharides (IMOs) are non-digestible oligosaccharides, considered as prebiotics and therefore aim to selectively feed probiotics indigenous to the human colon. Recent data obtained in human subjects, support the involvement of dietary oligosaccharides in physiological processes in the different intestinal cell type and also outside the gastrointestinal tract (e.g. hormone production, lipid and carbohydrate metabolism). IMOs consists of glucose monomers linked by at least one α-1-6, or in a lower proportion α -1-3 (nigerose family) or α -1-2 (kojibiose family) glucosidic linkages. In our case they are produced enzymatically from corn starch. It results in a very complex mixture with molecules characterized at the same time by their DP value (from 2 to ~20), linkages types (α-1-2, 3 or 6) and the proportion and position of each type of linkage (only α -1-6 or combined types). The challenge of this study was to find a qualitative and quantitative method to characterize the syrups. In a subsequent study, every unidentified peak could be determined by NMR or Mass spectrometry. Three different chromatographic methods have been tested and compared over their selectivity, sensibility, robustness, applicability and their quantitative power. The HPLC-RID (Refractive Index Detector) used with a Prevail Carbohydrate column (Alltech), adapted for carbohydrates with a certain value of DP, appear to be poorly selective due to the obligation of working in isocratic conditions. The HPLC-ELSD (Evaporating Light Scattering Detector) used with the same column gave a very good separation upon the DP as the Prevail accepts a wide range of solvant changing and even a separation of the different DP 2 molecules. The sensibility was also improved due to the stability of the baseline. The quantitative analysis is a bit more awkward due to the relatively limited linear portion of the calibration curve. High-performance Anion Exchange Chromatography coupled with Pulsed Amperometric Detection (HPAEC-PAD) appeared to deserve a special mention, since it provides selective separation and sensitive detection. In fact, this technique is the only chromatographic one to separate with effectiveness homologue molecules having a difference only in their DP (up to high DPs) or linkage types. This is due to the separation mode based on the difference in ionic force of the sugars in alkaline conditions (mainly due to the DP and the structure of the molecule). However, during the detection, the electrochemical behavior of carbohydrates can be affected by molecular weight as well as by structural differences giving rise to different response factors; as a consequence, HPAEC-PAD is not generally considered as suitable for quantitative studies of complex mixtures of oligosaccharides. In this work a methodological approach is presented in order to get a quantitative response through a rigorous methodology for our IMOs. It also opens the way to the theoretical determination of the response factor for the homologue molecules in relation with their structure and DP. [less ▲]

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See detailUn terrain fragmenté : le kimbanguisme et ses ramifications
Melice, Anne ULg

in Civilisations (2006), LIV(1-2), 67-76

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