Connexions 

Abstract: Une revue de question de l’actualite du concept de transition permet de soutenir un point de vue theorique de la transition qui se demarque notamment d’une « approche crisique » referee a la seule sphere d’insertion professionnelle. Il s’agit de mettre en exergue les activites de personnalisation par lesquelles les sujets signifient les situations de passage auxquelles ils sont confrontes au cours de leur vie professionnelle. Activites par lesquelles ils anticipent leurs futurs roles professionnels, par lesquelles ils valorisent leurs conduites de travail (presentes et a venir) relativement a leurs autres domaines d’activites, par lesquelles ils sollicitent, dans ces differentes spheres, le soutien et l’evaluation d’autrui significatifs. Pour etayer cette approche, nous presentons une synthese de travaux de recherche, relatifs a des situations de formation initiale et continue et des commentaires relatifs a ses applications pratiques.

Abstract: Ivan Selesnick March 7, 2013 NYU-Poly These notes address (approximate) solutions to linear equations by least squares. We deal with the ‘easy’ case wherein the system matrix is full rank. If the system matrix is rank deficient, then other methods are needed, e.g., QR decomposition, singular value decomposition, or the pseudo-inverse, [2, 3]. In these notes, least squares is illustrated by applying it to several basic problems in signal processing:

Abstract: These notes describe the derivation of a simple algorithm for signal denoising (filtering) based on total variation (TV). Total variation based filtering was introduced by Rudin, Osher, and Fatemi [8]. TV denoising is an effective filtering method for recovering piecewise-constant signals. Many algorithms have been proposed to implement total variation filtering. The one described in these notes is by Chambolle [3]. (Note: Chambolle described another algorithm in [2]). Although the algorithm can be derived in several different ways, the derivation presented here is based on descriptions given in [1, 10]. The derivation is based on the min-max property and the majorization-minimization procedure. Total variation is often used for image filtering and restoration, however, to simplify the presentation of the TV filtering algorithm these notes concentrate on one-dimensional signal filtering only. In addition, the algorithm described here may converge slowly for some problems. Faster algorithms for TV filtering have recently been developed, for example [1,10]. The development of fast, robust algorithms for TV and related non-linear filtering is an active topic of research.

Abstract: Dans le developpement des logiques destructrices du neoliberalisme, les procedures apparaissent comme le moyen privilegie de la fabrication de sujets reduits a l’etat agentique. La mutation anthropologique a l’œuvre implique, pour le clinicien confronte aux souffrances et aux pathologies qu’elle engendre, d’aborder jusque dans leur origine sociale les logiques desubjectivantes a l’œuvre dans la modernite.