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See detailDesign of concrete columns based on EC2 tabulated data – A critical review
Franssen, Jean-Marc ULg

in Franssen, Jean-Marc (Ed.) Proc. 1rst int. Structures in Fire workshop (2000, June)

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See detailLateral Torsional Buckling of Steel I-Beams in Case of Fire – Numerical Modelling
Vila Real, paulo; Franssen, Jean-Marc ULg

in Franssen, Jean-Marc (Ed.) Proc. 1rst int. Structures in Fire workshop (2000, June)

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See detailNew quadrangular shell element in SAFIR
Talamona, Didier; Franssen, Jean-Marc ULg

in Franssen, Jean-Marc (Ed.) Proc. 1rst int. Structures in Fire workshop (2000, June)

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See detailAnionic synthesis of cyclic anhydride end-capped poly(methyl methacrylate)
Fallais, Isabelle; Pantoustier, Nadège; Devaux, Jacques et al

in Polymer (2000), 41(14), 5535-5539

This paper reports on the anionic synthesis of poly(methyl methacrylate) chains end-capped by cyclic anhydride. The method is based on the chemical derivatization of a precursor tert-butyl diester end ... [more ▼]

This paper reports on the anionic synthesis of poly(methyl methacrylate) chains end-capped by cyclic anhydride. The method is based on the chemical derivatization of a precursor tert-butyl diester end-group. Compared to the thermal modification, which was previously used, this method allows intermolecular coupling and polymer degradation to be avoided. But up to now, the final anhydride content remains moderate and has still to be improved. [less ▲]

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See detailAn efficient automata approach to some problems on context-free grammars
Bouajjani, Ahmed; Esparza, Javier; Finkel, Alain et al

in Information Processing Letters (2000), 74(5-6), 221-227

Book and Otto (1993) solve a number of word problems for monadic string-rewriting systems using an elegant automata-based technique. In this note we observe that the technique is also very interesting ... [more ▼]

Book and Otto (1993) solve a number of word problems for monadic string-rewriting systems using an elegant automata-based technique. In this note we observe that the technique is also very interesting from a pedagogical point of view, since it provides a uniform solution to several elementary problems on context-free languages. [less ▲]

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See detailSynthesis and bulk properties of poly(methyl methacrylate)-b-poly(isooctyl acrylate(isooctyl acrylate)-b-poly(methyl methacrylate)
Tong, J. D.; Leclère, Philippe; Doneux, C. et al

in Polymer (2000), 41(12), 4617-4624

A series of well-defined poly(methylmethacrylate) (PMMA)-b-poly(isooctylacrylate) (PIOA)-b-PMMA triblock copolymers (MIM) has been synthesized by transalcoholysis of PMMA-b-poly(tert-butylacrylate) (PtBA ... [more ▼]

A series of well-defined poly(methylmethacrylate) (PMMA)-b-poly(isooctylacrylate) (PIOA)-b-PMMA triblock copolymers (MIM) has been synthesized by transalcoholysis of PMMA-b-poly(tert-butylacrylate) (PtBA)-b-PMMA precursors (MTM) by isooctyl alcohol. Phase separation is observed for all the investigated triblock copolymers, thus containing PMMA outer blocks in the 3500-50,000 molecular weight (MW) range and PIOA inner block with MW in the 100,000-300,000 range. The ultimate tensile properties of these MIM triblock copolymers are poor even when PMMA blocks of 50,000 MW are associated with an inner PIOA block of 300,000 MW. A reasonable explanation should be found in the molecular weight between chain entanglements (Me), which has been estimated at 60,000 for PIOA, much higher than Me for the traditional polydiene central blocks in the well-known thermoplastic elastomers of the triblock type. The tensile behavior of MIM copolymers has been successfully accounted for by a simple elastomer model free from chain entanglements, supporting the view that the lack of entanglements in the central block is very detrimental to the mechanical properties of the investigated fully (meth)acrylate triblock copolymers. [less ▲]

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See detailL'Université au fil du temps. Et maintenant le Sart Tilman.
Frankignoulle, Pierre ULg

Article for general public (2000)

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See detailAide à la délimitation de zones de calamités.
Dehem, D.; Tychon, Bernard ULg; Oger, R. et al

Conference (2000, May 31)

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See detailThe Belgian crop growth modelling system (B-CGMS). Contribution of remote sensing.
Eerens, H.; Tychon, Bernard ULg; Dehem, Didier et al

Conference (2000, May 31)

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See detailA survey of wheat take-all in Belgium
Bodson, Bernard ULg; Pamart, M.; Daoust, Serge et al

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (2000, May 09), 65(2a), 565-572

Take-all of wheat caused by the soil-borne fungus Gaeumannomyces graminis var. Tritici (Ggt) is known world-wide as a major yield-limiting factor. In Belgium, the Take-all disease is not very well known ... [more ▼]

Take-all of wheat caused by the soil-borne fungus Gaeumannomyces graminis var. Tritici (Ggt) is known world-wide as a major yield-limiting factor. In Belgium, the Take-all disease is not very well known. A take-all survey has been set up in 1999 in Belgium in collaboration between the Agricultural University of Gembloux and Monsanto where goals were to quantify the disease in the main cereal areas and to study the main factors influencing take-all development. [less ▲]

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See detailThree years of trials with trifloxystrobine fungicides in cereals in Belgium
Moreau, Jean-Marc; Vancutsem, Françoise ULg; Bodson, Bernard ULg et al

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (2000, May 09), 65(2b), 749-760

Trifloxystrobine-based fungicides were tested for two years in winter barley and three years in winter wheat in Belgium. One or two applications were compared with other strobilurine based fungicides. The ... [more ▼]

Trifloxystrobine-based fungicides were tested for two years in winter barley and three years in winter wheat in Belgium. One or two applications were compared with other strobilurine based fungicides. The efficacy of the combinations of trifloxystrobine (125 g/ha) + propiconazole (125 g/ha) and trifloxystrobine (125 g/ha) + cyproconazole (80 g/ha) for disease control in winter barley and winter wheat, respectivvely, was confirmed. They allowed yield increases comparable to those obtained with kresoxim-methyl and azoxystrobine-based fungicides [less ▲]

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See detailPhotoinduced birefringence and diffraction efficiency in azo dye doped or grafted polymers: theory versus experiment of the temperature influence
Blanche, Pierre-Alexandre ULg; Lemaire, P. C.; Maertens, Christophe et al

in Journal of the Optical Society of America. B, Optical Physics (2000), 17(5), 729-740

We have investigated the influence of the temperature on the photoinduced birefringence as well as on the diffraction efficiency of azo dye doped or grafted polymers. The samples are composed of three ... [more ▼]

We have investigated the influence of the temperature on the photoinduced birefringence as well as on the diffraction efficiency of azo dye doped or grafted polymers. The samples are composed of three polymer matrices containing 2, 5-dimethyl-4-(p-nitrophenylazo anisole). We propose two theoretical models to explain the experimental increase of both phenomena when the temperature is decreased. Models are based on the statistical angular distribution of the chromophores that depends on the intensity of the polarized laser beam in the media, counteracted by the thermal agitation. Parameters introduced in both models can be used to characterize the polymeric system properties. [less ▲]

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See detailAnother look at the empirical research on bankruptcy
Van Caillie, Didier ULg

Scientific conference (2000, May)

This conference proposes a state-of-the-art of the current empirical research devoted to business failure prediction and discusses some avenues for future research.

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See detailCocaine and Amphetamine-Regulated-Transcript Peptide Mediation of Leptin Stimulatory Effect on the Rat Gonadotropin-Releasing Hormone Pulse Generator in Vitro
Lebrethon, M. C.; Vandersmissen, E.; Gerard, Arlette ULg et al

in Journal of Neuroendocrinology (2000), 12(5), 383-5

Pulsatile gonadotropin-releasing hormone (GnRH) secretion was studied in vitro using explants of the retrochiasmatic hypothalamus from prepubertal male and female rats. Leptin caused a dose-dependent ... [more ▼]

Pulsatile gonadotropin-releasing hormone (GnRH) secretion was studied in vitro using explants of the retrochiasmatic hypothalamus from prepubertal male and female rats. Leptin caused a dose-dependent reduction of the GnRH interpulse interval in both sexes. We studied the effects of cocaine- and amphetamine-regulated transcript (CART) since this peptide was shown recently to mediate the anorectic effects of leptin in the hypothalamus. CART caused a reduction of the GnRH interpulse interval. This effect was prevented using an anti-CART antiserum which could partially overcome leptin stimulatory effects as well. Using hypothalamic explants from Zucker rats homozygous for the leptin receptor mutation ( fa/fa), GnRH pulse frequency was not affected by leptin, while a significant acceleration was caused by the CART-peptide. In conclusion, leptin involves the hypothalamic CART-peptide to stimulate the prepubertal GnRH pulse generator in vitro. [less ▲]

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See detailLa résistance mécanique du sol: mesure en continu et cartographie pour l’agriculture de précision
Sirjacobs, Damien ULg; Destain, Marie-France ULg

in Zwaenepoel, Philippe (Ed.) Agriculture de Précision - Avancées de la recherche technologique et industrielle (2000, May)

La résistance mécanique d'un sol est un paramètre important qui conditionne la croissance racinaire et le développement des plantes. L'objectif de cette recherche est de mettre au point un capteur capable ... [more ▼]

La résistance mécanique d'un sol est un paramètre important qui conditionne la croissance racinaire et le développement des plantes. L'objectif de cette recherche est de mettre au point un capteur capable de mesurer en ligne les variations locales de résistance du sol. Celui-ci est constitué d'un anneau dynamométrique qui enregistre automatiquement les sollicitations (forces horizontales, verticales et couple) générées par la traction uniforme d'un lame dans le sol. Une première expérience a été menée dans un champ limoneux situé en Hesbaye (Belgique). Le géocodage de ces informations via un système DGPS a permis d'identifier des zones de diverses résistance au sein de la parcelle étudiée. [less ▲]

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See detailDes outils pour évaluer les compétences transversales
Hubert, Sylvianne; Denis, Brigitte ULg

in Actes du 1er congrès des chercheurs en éducation (2000, May)

La problématique de l’évaluation des compétences transversales est au centre des préoccupations actuelles. Alors que de nombreuses méthodes d’évaluation des compétences disciplinaires existent et sont ... [more ▼]

La problématique de l’évaluation des compétences transversales est au centre des préoccupations actuelles. Alors que de nombreuses méthodes d’évaluation des compétences disciplinaires existent et sont usitées par les enseignants (interrogations au moyen de questions ouvertes, de QCM, examens oraux, …, Leclercq (1999), de Landsheere (1992)), l’évaluation des compétences transversales pose davantage de problèmes car, d’une part, la collecte d’informations permettant de juger de l’acquisition de ces compétences chez les élèves est plus délicate (elle nécessite souvent l’observation des élèves au cours de l’activité d’apprentissage, et ce au moyen de grilles d’observation (Denis, 1990)) ; d’autre part, l’acquisition des compétences transversales doit être envisagée à long terme et, par conséquent, leur évaluation doit se faire de manière continue et progressive. Une enquête réalisée auprès de 98 professeurs du cours d’Education par la Technologie1 révèle que 43% d’entre eux disent éprouver des difficultés pour apprécier l’acquisition de ces compétences chez leurs élèves (Hubert, Pauwen & Denis, 1997). De juillet 1997 à juin 1998, le Service de Technologie de l’Education de l’Université de Liège a été chargé par le Ministère de la Communauté française de mettre au point des outils permettant l’évaluation de ce type de compétences (Hubert, Bosmans & Denis, 1998). Cette recherche avait pour objectif de fournir aux enseignants du cours d’Education par la Technologie (ET) des méthodes et des moyens didactiques diversifiés pour évaluer les compétences transversales de leurs élèves lors d’activités de résolution de problèmes, mais aussi d’imaginer un système intégrant ces outils. Actuellement, l’évaluation de ces compétences fait également l’objet d’une réflexion dans le contexte de l’utilisation pédagogique d’Internet où les élèves sont amenés à réaliser, en groupe, un projet au moyen des potentialités offertes par Internet (Hubert, Detroz, Demily & Denis, 1999). Nous allons détailler, ici, les principes de base, les composantes principales et les modalités du système d’évaluation construit dans le cadre du cours d’ET. Nous tenterons d’attirer l’attention du lecteur sur les aspects méthodologiques qu’il convient d’annoncer à l’enseignant (et aux élèves). [less ▲]

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See detailReflux gastro-oesophagien de l'adulte: diagnostic et traitement
Louis, Edouard ULg; Belaiche, Jacques ULg

in Revue Médicale de Liège (2000), 55(5), 341-4

Gastro-oesophageal reflux is a frequent problem affecting up to one third of the Belgian adult population. It is most often a benign non evolutive disease. It is however frequently chronic, with a ... [more ▼]

Gastro-oesophageal reflux is a frequent problem affecting up to one third of the Belgian adult population. It is most often a benign non evolutive disease. It is however frequently chronic, with a significant negative impact on quality of life. The diagnostic and therapeutic management must be adapted to each individual case. In the majority of cases, the purpose of therapy is the control of symptoms and, in a small number of cases with severe oesophagitis the aim is a complete and persistent healing of lesions. A Franco-Belgian consensus meeting on diagnostic and therapeutic management of gastro-oesophageal reflux disease in adults was recently held. Guidelines have been proposed. The aim of the present paper is to highlight the main principles of these guidelines and to comment on their adjustment to current belgian medical practice. [less ▲]

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