Differentiation of tholeiitic basalt to A-type granite in the Sept Iles layered intrusion, Canada

in Journal of Petrology (2011)

Les différents niveaux des méthodes de calcul de la résistance au feu

Conference given outside the academic context (1997)

The distinction is explained between tabulated data, simple calculation models and advanced calculation models for the calculation of fire resistance of structures.

Différents traitements de la graine de lin dans le cadre de l'engraissement de vaches de réforme.

in 13ième Rencontres autour des Recherches sur les Ruminants (2006)

Differing in vitro biology of equine, ovine, porcine and human articular chondrocytes derived from the knee joint: an immunomorphical study.

in Histochemistry & Cell Biology (2009), 131

For lack of sufficient human cartilage donors, chondrocytes isolated from various animal species are used for cartilage tissue engineering. The present study was undertaken to compare key features of ... [more ▼]

For lack of sufficient human cartilage donors, chondrocytes isolated from various animal species are used for cartilage tissue engineering. The present study was undertaken to compare key features of cultured large animal and human articular chondrocytes of the knee joint. Primary chondrocytes were isolated from human, porcine, ovine and equine full thickness knee joint cartilage and investigated flow cytometrically for their proliferation rate. Synthesis of extracellular matrix proteins collagen type II, cartilage proteoglycans, collagen type I, fibronectin and cytoskeletal organization were studied in freshly isolated or passaged chondrocytes using immunohistochemistry and western blotting. Chondrocytes morphology, proliferation, extracellular matrix synthesis and cytoskeleton assembly differed substantially between these species. Proliferation was higher in animal derived compared with human chondrocytes. All chondrocytes expressed a cartilage-specific extracellular matrix. However, after monolayer expansion, cartilage proteoglycan expression was barely detectable in equine chondrocytes whereby fibronectin and collagen type I deposition increased compared with porcine and human chondrocytes. Animal-derived chondrocytes developed more F-actin fibers during culturing than human chondrocytes. With respect to proliferation and extracellular matrix synthesis, human chondrocytes shared more similarity with porcine than with ovine or equine chondrocytes. These interspecies differences in chondrocytes in vitro biology should be considered when using animal models. [less ▲]

Difficiles libertés de circulation

in Clochard, Olivier (Ed.) Atlas des Migrants en Europe (2012)

Difficultés dans l'utilisation d'instruments de pilotage pour la définition des politiques de sécurité locales-Le cas du moniteur de sécurité en Belgique

in Revue de la Faculté de Droit de l'Université de Liège (2005), 2005/1

"Les difficultés de mise en état d'un litige multipartite non indivisible", note sous J.P. Malmédy Spa Stavelot, siège de Spa, 19 septembre 2002

in Journal des Tribunaux (2003), (6092), 274-275

Les difficultés morphosyntaxiques des enfants présentant des troubles spécifiques du langage oral: une approche constructiviste

in Rééducation Orthophonique (2009), 238

The Construction and Usage-based Theory (CUT) combines two main approaches drawn from cognitive linguistics: construction grammar and usage-based theory. The CUT emphasizes the fact that language ... [more ▼]

The Construction and Usage-based Theory (CUT) combines two main approaches drawn from cognitive linguistics: construction grammar and usage-based theory. The CUT emphasizes the fact that language structures progressively emerge through the use of general cognitive processes. Most new forms produced by a child are built upon his/her own previous productions that he/she complexifies and generalizes to construct more abstract forms. These hypotheses have been tested with normally-developing children but have not yet been tested on children with specific language impairment (SLI). In this paper, we put forward several hypotheses drawn from constructivistic approaches to explain morphosyntactic difficulties displayed by children with SLI. Their goal is to create a theoretical framework for future behavioral studies. [less ▲]

Difficultés scolaires : comment améliorer la méthode de travail par l'Education cognitive

Scientific conference (2013, March 14)

De plus en plus d'élèves ont des difficultés liées à leur façon d'apprendre. Nombre d'entre eux présentent un point commun : ils n'ont pas pleinement développé leurs compétences métacognitives. L'élève n ... [more ▼]

De plus en plus d'élèves ont des difficultés liées à leur façon d'apprendre. Nombre d'entre eux présentent un point commun : ils n'ont pas pleinement développé leurs compétences métacognitives. L'élève n'exploite pas pleinement son potentiel d'apprentissage, il n'a pas développé un niveau suffisant de connaissances sur lui (ses points forts, ses points faibles, son style d'apprentissage ...) ni ses stratégies de haut niveau (anticipation, planification, contrôles et transfert). A cela, s'ajoutent des aspects psychoaffectifs aggravants (faibles objectifs d'apprentissage, faible estime de soi, démobilisation scolaire ...). Incluant une définition de la métacognition, il s'agira notamment d'étudier les actions possibles à l'aide d'outils et de méthodes notamment issus de l'Education cognitive. [less ▲]

A Diffraction Model for Acoustical Ray-Tracing Based on the Energy Flow Lines Concept

in Acta Acustica United with Acustica (2013), 99

Geometrical acoustics models are currently the most popular prediction tools in room-acoustics due to their low computing load. However, they seldom take into account the diffraction occurring at free ... [more ▼]

Geometrical acoustics models are currently the most popular prediction tools in room-acoustics due to their low computing load. However, they seldom take into account the diffraction occurring at free edges. Moreover, the existing diffraction models implemented in geometrical acoustics algorithms are either limited to specularly reflected paths or either present excessive computation load. Recently, a diffraction model based on an approximation of the far-field direction of the Poynting’s vector around half-planes has been introduced for computing the scattering due to faceted dielectric objects. In this article, this model is developed to handle obliquely incident waves and is implemented within an acoustic ray-tracing software using the analogy between the Poynting’s and the acoustic intensity vectors. The proposed model can handle both diffuse and specular reflections and sets no limit in terms of reflection or diffraction order. The first results obtained by ray-tracing agree well with the uniform theory of diffraction and the boundary elements method for single and double diffraction problems even if the interference effects are neglected and as long as the number of emitted rays is sufficient. Moreover, the additional computation load to handle diffraction is shown to be low compared to the one from a classical ray-tracing algorithm. [less ▲]