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See detailA 2.5 D finite element model for bending and straightening in continuous casting of steel slabs
Pascon, Frédéric ULg; Cescotto, Serge ULg; Habraken, Anne ULg

in International Journal for Numerical Methods in Engineering (2006), (68), 125-149

This paper presents a bi-dimensional slice model of the continuous casting process developed to focus on the risk of transverse cracking during bending and straightening of steel slabs. The model is based ... [more ▼]

This paper presents a bi-dimensional slice model of the continuous casting process developed to focus on the risk of transverse cracking during bending and straightening of steel slabs. The model is based on the finite element method and it integrates both thermal and mechanical aspects: temperature evolution, solidification, stress and strain developments. Generalized plain strain conditions are applied in the casting direction, allowing taking account of the extraction force applied to the slab as well as strains in this direction. The model also includes an original solution to counteract the generally wrong modelling of slab bulging with such slice models. The model has been applied to an industrial case of slab casting. Some numerical results illustrate the accuracy of the model compared to results of other models, measurements and observations on the caster. Transverse cracks are predicted to be the most likely to occur at the edge on the upper face, at the end of straightening of the slab. This is due to the combination of low ductility of the material with tensile stress and elongation in the casting direction in the straightening zone. This conclusion has been confirmed by the examination of slabs that present transverse cracks. [less ▲]

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See detailA Mossbauer spectral study of the YCo4-xFexB compounds
Long, Gary J; Hermann, Raphaël ULg; Grandjean, Fernande ULg et al

in Journal of Physics. Condensed Matter : An Institute of Physics Journal (2006), 18(48), 10765-10773

The Mossbauer spectra of the YCo4-xFexB compounds, where x is 1, 2 and 3, have been measured at 78 and 295 K and reveal relatively small iron hyperfine fields of about 15 T, relatively large quadrupole ... [more ▼]

The Mossbauer spectra of the YCo4-xFexB compounds, where x is 1, 2 and 3, have been measured at 78 and 295 K and reveal relatively small iron hyperfine fields of about 15 T, relatively large quadrupole interactions of about +1.0 and -1.0 mm s(-1) and very different spectra for YCo3FeB and YCo2Fe2B as compared with YCoFe3B. As a consequence, the spectra have been fitted with a full Hamiltonian by adjusting the hyperfine parameters of the iron 2c and 6i sites found in these compounds. The fits have used an asymmetry parameter, eta and Euler angles, theta and phi, that relate the hyperfine field to the iron electric field gradient axes of each iron site in an orientation that is consistent with the structural and magnetic properties of the site. The fits indicate that the relative areas of the spectral components assigned to the two iron 2c and 6i sites are in agreement with the iron occupancy of the sites as determined by neutron diffraction. The results of the fits also indicate both that the full Hamiltonian approach is required for physically reasonable spectral fits and that the small observed fields result from the presence of large orbital contributions which subtract from the Fermi contact contributions to the magnetic hyperfine fields of the two sites. [less ▲]

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See detailEffect of ß-Cyclodextrin Derivatives on Bronchial Epithelial Cell Layer Permeability
Bosquillon, C; Belhadj Salem, L; Hernandez, E et al

in Delivery to the lung (2006), 17

Cyclodextrins have been identified as promising adjuvants for pulmonary drug delivery. However, concerns regarding possible adverse effects on the respiratory epithelium may limit their development in ... [more ▼]

Cyclodextrins have been identified as promising adjuvants for pulmonary drug delivery. However, concerns regarding possible adverse effects on the respiratory epithelium may limit their development in inhaled products. Concentrations (10-50 mM) of three ß-cyclodextrin derivatives, randomly methylated ß-cyclodextrin (RAMEB), hydroxypropyl-ß-cyclodextrin (HPßCD) and Kleptose® CRYSMEB, were applied to human respiratory epithelial (Calu-3) cell layers and effects on permeability were evaluated by 14C-mannitol permeability and transepithelial electrical resistance (TEER) measurements. Each cyclodextrin produced a concentration-dependent increase in mannitol flux which was associated with a drop in TEER. Increases in mannitol flux were the highest after exposure to RAMEB and were not apparent until a 50-60% reduction in TEER was reached. Disrupted cell layers recovered to their initial TEER value in less than 24 h except after exposure to high concentrations of RAMEB. Perturbations of the Calu-3 cell layers were shown to be dependent on cyclodextrin concentration, as well as chemical derivatisation, and were reversible in all but the most severe cases. [less ▲]

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See detailThe effects of aging on the recognition of different types of associations
Bastin, Christine ULg; Van der Linden, Martial ULg

in Experimental Aging Research (2006), 32

The present study examined how aging influences item and associative recognition memory, and compared memory for two types of associations: associations between the same kinds of information and ... [more ▼]

The present study examined how aging influences item and associative recognition memory, and compared memory for two types of associations: associations between the same kinds of information and associations between different kinds of information. A group of young adults and a group of older adults performed a forced-choice face recognition task and two multitrial forced-choice associative recognition tasks, assessing memory for face-face and face-spatial location associations. The results showed disproportionate age-related decline of associative recognition compared to intact item recognition. Moreover, aging affected both types of associative tasks in the same way. The findings support an associative deficit hypothesis (Naveh-Benjamin, Journal of Experimental Psychology: Learning, Memory and Cognition, 26, 1170–1187, 2000), which attributes a substantial part of the age effect on episodic memory tasks to difficulty with binding individual components into a cohesive memory trace. This associative deficit seems to affect same-information associations, as well as different-information associations. [less ▲]

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See detailCorps étrangers et HACCP dans les PME : application au secteur pâtisserie sèche/biscuiterie.
de Biourge, Sandrine; Quenon, Nathalie; Sindic, Marianne ULg

in Industries alimentaires et agricoles (2006), 123(4-5), 10-13

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See detailEtat des lieux des obligations en matière de cuisine collective.
Dehon, Lydie; Goebel, Laurence; Moerman, John et al

Article for general public (2006)

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See detailL’Écrivain et son double. Hubert Nyssen
Durand, Pascal ULg

Book published by Actes Sud (2006)

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See detailVue d'ensemble sur la planification et la réalisation d'autoroutes en Région wallonne
Hanson, Sophie ULg; Michel, Quentin ULg

in Spannowsky, Willy (Ed.) Planification et autorisation des autoroutes - Comparaison des systèmes d'aménagement du territoire dans la Grande Région "Sarre, Lorraine, Grand-Duché de Luxembourg, Région wallonne et Rhénanie-Palatinat (2006)

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See detailCSL TV chambers Updating
Grodent, Christophe ULg; franco

Conference (2006)

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See detailStrategies nouvelles et recompositions sociales autour de la faune dans le Bassin du Congo.
Vermeulen, Cédric ULg; Doucet, Jean-Louis ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2006), 10(3), 251-257

The faunaʼs overexploitation in the Congo basin in general and within logging concessions in particular case still appears as a crucial problematic. Commercial poaching threats not only mammal ... [more ▼]

The faunaʼs overexploitation in the Congo basin in general and within logging concessions in particular case still appears as a crucial problematic. Commercial poaching threats not only mammal biodiversity but also long-term food safety of local populations. Strangely, this situation is generating a new and collective answer from stakeholders having opposite interests. Administrative authorities, international NGOs of conservation, logging companies have found in the context of wood certifi cation a common deal to begin an anti-poaching action on large landscapes. This study analyses interests of each stakeholder and discusses the place given to populations in this social blending around wildlife. [less ▲]

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See detailExamination of non-genetic factors affecting the growth performance of Djallonke sheep in soudanian zone at the Okpara Breeding farm of Benin
Gbangboche, A. B.; Youssao, A. K. I.; Adamou-Ndiaye, M. et al

in Tropical Animal Health and Production (2006), 38

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See detailLa PESD après l'échec constitutionnel européen
Dumoulin, André ULg

in Sur, Serge (Ed.) Annuaire français de relations internationales 2006 (2006)

La crise autour du Traité constitutionnel a épargné la Politique européenne de sécurité et de défense. Le Conseil européen va devoir néanmoins récupérer certaines avancées de la PESD qui avait été ... [more ▼]

La crise autour du Traité constitutionnel a épargné la Politique européenne de sécurité et de défense. Le Conseil européen va devoir néanmoins récupérer certaines avancées de la PESD qui avait été introduite directement dans ce document à haute valeur symbolique. Au-delà d’une visibilité pragmatique de l’UE en matière de missions civilo-militaires, la PESD pourrait être autant soutenue que fragilisée par de nouvelles configurations organiques imposées par les événements institutionnels européens : structure de coopération ad hoc, noyaux durs, cercles thématiques, union dans l’union. Toutes configurations qui complexifient la lecture d’une Union européenne « sans frontières ». [less ▲]

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See detailPrevalence and sources of Campylobacter spp. contamination in free-range broiler production in Belgium
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Beckers, Yves ULg et al

in World's Poultry Science Journal (2006), 62(supplément), 557

An one year epidemiological study was carried out between February 2005 and January 2006 in Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks ... [more ▼]

An one year epidemiological study was carried out between February 2005 and January 2006 in Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks on 6 belgian farms were investigated for the presence of Campylobacter ssp. during the rearing period. Each flock was visited four times, before and after the outdoor rearing period. During each visit, samples were taken in the broiler houses (litter, cecal droppings, water-lines, feed, entrance premises) as well as from the outer rearing environment (open-air range). Conventional microbiological methods combined with biochemical tests were used for the Campylobacter detection, species identification and isolation. Campylobacter prevalence was very high in free-range broiler production during the experimental period. C. jejuni is the main species isolated from all contaminated samples, while mixed C. jejuni/C. coli infections sometimes occured. Contamination of the broiler flocks was increased in summer/autumn, with a 100% flocks contamination, whereas only 4 (66.7%) and 3 (50%) of the flocks became Campylobacter positive in spring and winter respectively, at the end of the rearing period. Moreover, about 53.8% of contaminated flocks were infected with Campylobacter before chicks have access to the open-air range. In 69.2% of the Campylobacter-positive flocks, the open-air range soil belonged partly of fully to environmental samples found to be Campylobacter-positive before flock infection. The other potential sources of infection were delivery tray, entrance premises floor and water-lines. The access to an open-air range seems to be an important way of contamination of broilers because Campylobacter prevalence in the flocks increased after going out. [less ▲]

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See detailNeuroendocrine mechanisms controlling female puberty: new approaches, new concepts.
Ojeda, S.; Roth, C.; Mungenast, A. et al

in International Journal of Andrology (2006), 29

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