Étude unidirectionnelle de la distribution de température dans un échantillon viscoélastique en fatigue de flexion

Étude analytique du modèle mathématique -- Contrainte et génération de chaleur -- Idéalisation du modèle -- Distribution de température analytique du modèle -- Analyse numérique du modèle mathématique -- Méthode itérative de Liebmann -- Méthode de surrelaxation successive (SQR) -- Équations d'équilibre théorique du modèle mathématique -- Équation du noeud à la base du modèle -- Équation du noeud interne -- Équation du noeud près de la surface -- Équation du noeud à la surface -- Critère de convergence -- Programmation numérique -- Étude des propriétés mécaniques de l'acétal homopolymère et du nylon 66 -- Comparaison de la méthode numérique avec la méthode analytique -- Facteur de relaxation optimal -- Critère de convergence -- Dimension de l'élément de la grille du modèle -- Comparaison de la solution numérique et analytique dans le modèle -- Comparaison des résultats expérimentaux et numériques obtenus des échantillons d'acétal homopolymère et de nylon 66

Le FORUM, Vol. 35 No. 3

https://digitalcommons.library.umaine.edu/francoamericain_forum/1031/thumbnail.jp

XMM-Newton probes the stellar population in Cha I South

We report on a 30ksec XMM-Newton observation of the central region of the Cha I star forming cloud. Virtually all known T Tauri star members and most of the very-low mass objects including two bona-fide brown dwarfs (spectral types M7.5 and M8) are detected. We identify several new candidate members in the X-ray image. Spectral analysis of the X-ray bright stars shows that previous X-ray studies in Cha I have underestimated the X-ray luminosities, as a result of simplified assumptions on the spectral shape. No dramatic changes in the correlations of X-ray luminosity with age, effective temperature and mass are seen at the substellar boundary, and the lowest-mass objects behave similar to the higher-mass T Tauri stars in terms of variability. Thus the same dynamo mechanism seems to operate in both low-mass stars and brown dwarfs, at least at young ages. On the other hand, the only two A-type stars in the field show very different X-ray properties, suggesting that various emission mechanisms may be at work in intermediate-mass stars.Comment: accepted for publication in A&

A framework for research on e-learning assimilation in SMEs: a strategic perspective

Purpose – This study aims to propose an integrative conceptual framework of e-learning adoption and assimilation that is adapted to the specific context of small to medium-sized enterprises (SMEs). Design/methodology/approach – The literature on the state of e-learning usage in SMEs and on the IT adoption and assimilation factors that can be specifically applied to e-learning adoption and assimilation in this context are reviewed. These factors are then integrated within a research framework, and a set of 20 propositions formulated. Findings – The paper identifies the technological, organizational and environmental factors that are likely to favor or hinder e-learning adoption and assimilation in SMEs, as well as the interaction among these factors. Research limitations/implications – The integrative framework and the 20 propositions that emanate from it constitute the conceptual foundation for a research program and hypotheses on the adoption and assimilation of e-learning in SMEs. Practical implications – This study offers managers a frame of reference to analyze their firm's situation before initiating an e-learning program by highlighting key adoption and assimilation factors in the specific context of SMEs. Originality/value – This study proposes an integrative conceptual framework of e-learning adoption and assimilation that is adapted to the specific context of SMEs

Etude de l'état de surface de pièces produites selon un procédé RTM-phénolique

Matériaux étudiés et mise en oeuvre R.T.M -- Techniques d'analyses utilisées

Compaction of fiber reinforcements for composite manufacturing : a review of analytical results

Experimental trends and compaction models -- composite -- Materials processing -- Analytical compaction models -- textile processing