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See detailField-dependent vortex pinning strength in a periodic array of antidots
Silhanek, Alejandro ULg; Raedts, S.; Lange et al

in Physical Review. B : Condensed Matter (2003), 67(6),

We explore the dynamic response of vortex lines in a Pb thin film with a periodic array of antidots by means of ac-susceptibility measurements. For low drive field amplitudes, within the Campbell regime ... [more ▼]

We explore the dynamic response of vortex lines in a Pb thin film with a periodic array of antidots by means of ac-susceptibility measurements. For low drive field amplitudes, within the Campbell regime, vortex motion is of intravalley type and the penetration depth is related to the curvature of the pinning potential well alpha. For dc fields below the first matching field H-1, alpha reaches its highest value associated with a Mott insulator like phase where vortex lines are strongly localized at the pinning sites. For H-1<H-dc<H-2, the response is mainly due to the interstitial vortices and α drops to smaller values as expected for this metallic like regime. Strikingly, for H-2<H-dc<H-3, we observe that α reduces further down. However, for H-3<H-dc<H-4, a reentrance in the pinning strength is observed, due to a specific configuration of the flux-line lattice which strongly restricts the mobility of vortices. We present a possible explanation for the measured α(H-dc) dependence based on the different flux-line lattice configurations. [less ▲]

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See detailL’expérience politique des jeunes, par Anne Muxel (compte rendu)
Fournier, Bernard ULg

in Politique et Sociétés (2003), 22(2)

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See detailUne approche neuropsychologique des relations entre mémoire épisodique et mémoire sémantique
Bastin, Christine ULg; Van der Linden, Martial ULg

in Revue de Neuropsychologie (2003), 13(1), 3-69

Cognitive models of the organization of memory propose different conceptions of the relationships between episodic and semantic memory. In the present review, we consider two influential models. According ... [more ▼]

Cognitive models of the organization of memory propose different conceptions of the relationships between episodic and semantic memory. In the present review, we consider two influential models. According to one model (Tulving, 1995), episodic and semantic memory are two functionally and anatomically distinct systems. Their relationships are referred to as “embeddedness”, that is, information must be encoded in semantic memory in order to achieve episodic memory. Another model (Squire & Zola, 1998) describes episodic and semantic memory as two subsystems of declarative memory. Both depend on the same brain region and should be impaired in amnesic patients. Furthermore, information is usually first encoded in episodic memory, before being transferred to semantic memory. In this review, we describe the neuropsychological data that support each model, as well as studies that contradict these models. Three sets of evidence are described. First, we consider recognition memory in amnesic patients. Recognition memory processes, recollection and familiarity, have been related to episodic and semantic memory, respectively (Tulving, 1995). Contradictory findings exist concerning the relative preservation of familiarity-based recognition in certain types of amnesic patients. Then we describe studies that have examined whether amnesic patients can learn new semantic information or not. Finally, episodic learning in semantic dementia is considered. [less ▲]

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See detailUne évocation pythagoricienne des Enfers chez Tibulle (I, 3, 59-66)
Rochette, Bruno ULg

in Etudes Classiques (2003), 71(2), 175-180

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See detailFitting lactation curves of dairy cattle in different types of herds in Tunisia
Rekik, Boulbaba; Ben Gara, Abderrahmen; Ben Hamouda, Mohamed et al

in Livestock Production Science (2003), 83(2-3), 309-315

The incomplete gamma function was used to fit lactation curves of Holstein-Friesian cows in four types of herds in Tunisia. A total of 8640 records were used in the analysis. These included 1269, 637, 239 ... [more ▼]

The incomplete gamma function was used to fit lactation curves of Holstein-Friesian cows in four types of herds in Tunisia. A total of 8640 records were used in the analysis. These included 1269, 637, 239, and 498 first lactation and 2986, 1441, 650, and 920 second and later lactation records in four herd groups namely investors, state, cooperative, and farmers' herds, respectively. The effects of environmental variables, production sector, herd, parity, first test-day date, calving year, and calving season on the main lactation curve traits were analysed. The factors associated with milk yield at the beginning of lactation and the decreasing phase of the curve, persistency, and peak yield varied significantly (P<0.01) with all variables. The ascending phase of the lactation curve was not affected by parity and calving year, while days in milk until peak depended only on the rank of lactation. The state herds had the lowest peak and total yields. The summer season was unfavourable for milk production. In contrast to first lactation cows, third lactation cows had the highest peak and total yields. Milk yield was highly correlated with peak yield (r = 0.79) and was not related to persistency measure. (C) 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailDeux approches contrastées our développer les compétences transversales dans les grands groupes universitaires
Leclercq, Dieudonné ULg; Marotte, Paul; Simon, Fabienne et al

in Beauchesne, André; Boutin, Noël; Mathieu, Sylvie (Eds.) et al Le congrès «L'Université au service de l'apprentissage : à quelles conditions?» (2003)

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See detailProposition d’une méthode d’inventaire « aménagement » pour le diagnostic des peuplements touchés par la « maladie du hêtre » en Région wallonne
Lejeune, Philippe ULg; Huart, Olivier; Rondeux, Jacques ULg

Learning material (2003)

L’inventaire du matériel sur pied constitue un outil indispensable pour une gestion raisonnée des peuplements forestiers présentant une structure irrégulière et se régénérant par voie naturelle. Pareil ... [more ▼]

L’inventaire du matériel sur pied constitue un outil indispensable pour une gestion raisonnée des peuplements forestiers présentant une structure irrégulière et se régénérant par voie naturelle. Pareil inventaire constitue en effet le seul moyen d’apprécier la structure et la composition du peuplement ainsi que sa dynamique de rajeunissement. Une telle opération, lorsqu’elle est mise en oeuvre à l’échelle d’une unité d’aménagement, voire d’une propriété, peut fournir au gestionnaire un tableau de bord synthétisant les principaux indicateurs d’état des peuplements et permettant d’orienter les choix stratégiques en matière d’aménagement. L’intérêt d’un tel outil est renforcé lorsque les peuplements concernés ont connus des perturbations importantes, se traduisant par des prélèvements extraordinaires et l’apparition d’un déséquilibre profond au plan de la structure et de la composition. L’objet du présent document est de décrire une méthode d’inventaire par échantillonnage permettant de collecter rapidement et avec une précision connue un ensemble d’informations utile à la gestion et l’aménagement de peuplements feuillus dont la surface peut varier de quelques centaines à plusieurs milliers d’hectares. [less ▲]

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See detailEfficacy and safety of the fully human anti-tumour necrosis factor alpha monoclonal antibody adalimumab (D2E7) in DMARD refractory patients with rheumatoid arthritis: a 12 week, phase II study
van de Putte, L. B. A.; Rau, R.; Breedveld, F. C. et al

in Annals of the Rheumatic Diseases (2003), 62(12), 1168-1177

OBJECTIVES: To evaluate efficacy, dose response, safety, and tolerability of adalimumab (D2E7) in disease modifying antirheumatic drug (DMARD) refractory patients with longstanding, active rheumatoid ... [more ▼]

OBJECTIVES: To evaluate efficacy, dose response, safety, and tolerability of adalimumab (D2E7) in disease modifying antirheumatic drug (DMARD) refractory patients with longstanding, active rheumatoid arthritis (RA). METHODS: During a 12 week, double blind, placebo controlled study, 284 patients were randomly allocated to receive weekly subcutaneous injections of adalimumab 20 mg (n = 72), 40 mg (n = 70), or 80 mg (n = 72) or placebo (n = 70) without concomitant DMARDs. RESULTS: Adalimumab significantly improved the signs and symptoms of RA for all efficacy measures. ACR20 responses with adalimumab were significant at each assessment versus placebo (p</=0.01). Additionally, ACR responses with adalimumab were achieved more rapidly than with placebo, with 82/115 (71%) of the ultimate ACR20 response rate to adalimumab treatment achieved at week 2. At week 12, for adalimumab 20, 40, and 80 mg, ACR20 response rates were 50.7%, 57.1%, and 54.2%, respectively, versus 10.0% for placebo (p</=0.001 for all comparisons); ACR50 rates were 23.9%, 27.1%, and 19.4%, respectively, versus 1.4% for placebo (p</=0.001 for all comparisons); and ACR70 rates were 11.3%, 10.0%, and 8.3%, respectively, versus 0.0% for placebo (p</=0.05 for all comparisons). All adalimumab doses significantly improved all ACR core criteria at all assessments. The 40 mg and 80 mg doses provided similar benefit. Adalimumab at all doses was generally well tolerated, with only mild or moderate adverse events. Completion rates were 87% for adalimumab and 67% for placebo. CONCLUSIONS: Adalimumab given as monotreatment to patients with longstanding, severe RA refractory to traditional DMARDs produced a rapid, sustained response and was safe and well tolerated, with no dose limiting side effects. [less ▲]

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See detailLe bon management
Choffray, Jean-Marie ULg

in Le Moal, Pierre (Ed.) Savoir Gérer: Mélanges en l'Honneur de Jean-Claude Tarondeau, (2003)

L’objet de cet article est de présenter le fruit de plusieurs années d’observation et de réflexion sur ce qu’est véritablement l’entreprise : sa finalité, sa performance, ses modes d’organisation et de ... [more ▼]

L’objet de cet article est de présenter le fruit de plusieurs années d’observation et de réflexion sur ce qu’est véritablement l’entreprise : sa finalité, sa performance, ses modes d’organisation et de contrôle. Les principes de bon management qui y sont développés ont trait à l’efficacité, la croissance, l’innovation, la confiance, le pouvoir, la concurrence et l’apprentissage. Ils sont complétés par des suggestions quant au fonctionnement et à l’organisation future des entreprises. [less ▲]

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See detailSylviculture et qualité du bois de l'épicéa en Région wallonne
Hebert, Jacques ULg; Herman, Marc; Jourez, Benoît ULg

in Forêt Wallonne (2003), 62

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See detailImmigrants and National Identity in Europe - A. Triandafyllidou
Martiniello, Marco ULg

in Nations & Nationalism (2003), 9(1), 165-166

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See detailCompte rendu de l'ouvrage de M. Lamy : L'Immaculée Conception
Delfosse, Annick ULg

in Moyen Age (Le) (2003), 109(2), 388-389

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See detailA stepwise approach for chemical risks assessment at the workplace
Mairiaux, Philippe ULg; Balsat, Alain; Dujardin, Marco et al

Scientific journal (2003)

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See detailEffets de la nicotine et du cannabis sur le systeme nerveux central.
Seutin, Vincent ULg

in Revue Médicale de Liège (2003), 58(1), 19-21

We describe the molecular mechanisms of action of nicotine and delta 9-tetrahydrocannabinol, the most potent component of cannabis. Like other drugs of abuse, these compounds enhance dopamine release in a ... [more ▼]

We describe the molecular mechanisms of action of nicotine and delta 9-tetrahydrocannabinol, the most potent component of cannabis. Like other drugs of abuse, these compounds enhance dopamine release in a precise area of the limbic system when administered acutely. It has recently been shown that the cannabinoid receptors on which delta 9-tetrahydrocannabinol acts are also activated by endogenous ligands such as anandamide. This unconventional neurotransmitter appears to have important physiological effects in the central nervous system. Both preclinical and clinical evidence suggests that nicotine is more addictive than delta 9-tetrahydrocannabinol. However, the intimate interactions that exist between cannabinoid and opioid systems within the brain suggest that cannabinoids should not be considered as harmless drugs of abuse. [less ▲]

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See detailInternal anatomy of catfishes.
Kapoor, B. G.; Khana, B.; Diogo, Rui et al

in Kapoor, B. G.; Arratia, G.; Diogo, Rui (Eds.) et al Catfishes (2003)

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See detailCitizenship and Migration - S. Castles and A. Davidson
Martiniello, Marco ULg

in International Sociology (2003), 18(2), 417-418

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See detailImage analysis characterization of multi-walled carbon nanotubes
Gommes, Cédric ULg; Blacher, Silvia ULg; Masenelli-Varlot, Karine et al

in Carbon (2003), 41(13), 2561-2572

An original image analysis method is presented to characterize multi-walled carbon nanotubes from transmission electron microscopy images. The analysis is performed in three steps: (i) image preprocessing ... [more ▼]

An original image analysis method is presented to characterize multi-walled carbon nanotubes from transmission electron microscopy images. The analysis is performed in three steps: (i) image preprocessing in order to isolate the nanotubes from the background, (ii) image segmentation, aiming at keeping only the measurable sections of nanotubes, and finally (iii) tube characteristics measurement. The measurement is based on a Lambert-like electron absorption law and is performed on the original gray level image itself. Two geometrical and one physical characteristics are determined for each tube, namely, its outer and inner radius and a linear electron absorption coefficient. The method is illustrated by comparing a pristine and an annealed carbon nanotube samples. The compaction of the tube walls during annealing is shown to result from a lowering of the external radius while the inner radius is left unchanged. (C) 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailRéflexions sur l'anthropologie du temps: Le cas de l'Egypte ancienne. Questions et méthodes
Winand, Jean ULg

in Pirenne, Vinciane (Ed.) Représentations du temps dans les religions (2003)

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