Ways of Enhancing Postsecondary Persistence and Success

Traduction de: Des pistes pour accroître la persévérance et la réussite à l'enseignement supérieurSection 1 | Student resources that promote academic persistence and success. Section 2 |Teaching and learning for student development and academic success. Section 3 | How study programs contribute to academic success. Section 4 | Academic success at the institutional level. Section 5 | The keys to successful postsecondary education according Hattie, Kuh, and Tinto

Le programme d'insertion professionnelle au Cégep Limoilou

Quatre conseillers pédagogiques du Cégep Limoilou nous présentent les principales caractéristiques du programme d’insertion professionnelle du personnel enseignant lié à sa Politique de gestion des ressources humaines et destiné aux professeurs détenant moins de deux ans d’expérience au Collège. En plus de contribuer au développement de l’identité professionnelle des participants, le programme donne l’occasion à ceux-ci de développer des outils d’apprentissage et d’évaluation de même que des approches d’enseignement et des stratégies de gestion de classe. En somme, l’enrichissement du cadre de référence guidant les pratiques des professeurs est au centre du programme et conduit ses participants à mieux jouer leur rôle auprès des étudiants

Revisiting the spectral analysis for high-order spectral discontinuous methods

The spectral analysis is a basic tool to characterise the behaviour of any convection scheme. By nature, the solution projected onto the Fourier basis enables to estimate the dissipation and the dispersion associated with the spatial discretisation of the hyperbolic linear problem. In this paper, we wish to revisit such analysis, focusing attention on two key points. The first point concerns the effects of time integration on the spectral analysis. It is shown with standard high-order Finite Difference schemes dedicated to aeroacoustics that the time integration has an effect on the required number of points per wavelength. The situation depends on the choice of the coupled schemes (one for time integration, one for space derivative and one for the filter) and here, the compact scheme with its eighth-order filter seems to have a better spectral accuracy than the considered dispersion-relation preserving scheme with its associated filter, especially in terms of dissipation. Secondly, such a coupled space–time approach is applied to the new class of high-order spectral discontinuous approaches, focusing especially on the Spectral Difference method. A new way to address the specific spectral behaviour of the scheme is introduced first for wavenumbers in [0,π][0,π], following the Matrix Power method. For wavenumbers above π, an aliasing phenomenon always occurs but it is possible to understand and to control the aliasing of the signal. It is shown that aliasing depends on the polynomial degree and on the number of time steps. A new way to define dissipation and dispersion is introduced and applied to wavenumbers larger than π. Since the new criteria recover the previous results for wavenumbers below π, the new proposed approach is an extension of all the previous ones dealing with dissipation and dispersion errors. At last, since the standard Finite Difference schemes can serve as reference solution for their capability in aeroacoustics, it is shown that the Spectral Difference method is as accurate as (or even more accurate) than the considered Finite Difference schemes

Former des étudiants différents, un engagement collectif

Également disponible en version papierTitre de l'écran-titre (visionné le 16 sept. 2009

Synthesis of branched-phosphodiester and mannosecentered fucosylated glycoclusters and their binding studies with Burkholderia ambifaria lectin (BambL)

Universite Montpellier 2, Region Rhoˆne-Alpes Cluster Chimie. A.A.International audienceFive fucosylated glycoclusters exhibiting 4, 6 or 8 residues were synthesised with two different spatial environments based on mannose-centered and branched-phosphodiester scaffolds. Their synthesis was performed in solution using phosphoramidite chemistry to generate phosphodiester linkages, combined with Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC). The multivalent ligands were evaluated for their ability to bind to Burkholderia ambifaria Lectin (BambL). Binding evaluation was performed through inhibition of hemagglutination (HIA), surface plasmon resonance (SPR) and isothermal titration microcalorimetry (ITC). All fucosylated glycoclusters exhibited a higher affinity to BambL than methyl α-L-fucoside. A dissociation constant of 43 nM was observed for the fucocluster exhibiting four residues with the branched-phosphodiester spatial environment corresponding to a 22-fold increase in comparison with methyl α-L-fucoside. These multivalent fucoclusters represent the first example of ligands of high affinity to BambL

Kilometer range filamentation

International audienceWe demonstrate for the first time the possibility to generate long plasma channels up to a distance of 1 km, using the terawatt femtosecond T&T laser facility. The plasma density was optimized by adjusting the chirp, the focusing and beam diameter. The interaction of filaments with transparent and opaque targets was studied