Innovation sociale et diffusion dans l’économie sociale et solidaire à travers l’exemple de Social Planet

En 2014, la Loi française Économie sociale et solidaire-ESS donne lescontours de l’innovation sociale sans pour autant aborder les difficultés de diffusion et d’institutionnalisation particulièrement prégnantes dans l’ESS. L’expérience de la plateforme collaborative Social Planet montre que des outils émergent pour médiatiser des innovations sociales et interroge les tensions existantes entre la valorisation et la diffusion de l’innovation sociale dans l’ESS, ainsi que la place des collectivités publiques dans le développement de l’innovation sociale

Analyse théorique et empirique du dispositif de crédit solidaire et d’aide sociale du Crédit Municipal de Nantes

Analyse théorique et empirique du dispositif de crédit solidaire et d’aide sociale du Crédit Municipal de Nantes in Glémain, P., Le microcrédit personnel garanti : une analyse transdisciplinaire de l'accompagnement dans le cadre d'un service bancaire solidaire, CeRESS ESSCA et collectif de recherche FIMOSOL</p

Multiaxial Kitagawa analysis of A356-T6

Experimental Kitagawa analysis has been performed on A356-T6 containing natural and artificial defects. Results are obtained with a load ratio of R = -1 for three different loadings: tension, torsion and combined tension-torsion. The critical defect size determined is 400 \pm 100 \mum in A356-T6 under multiaxial loading. Below this value, the microstructure governs the endurance limit mainly through Secondary Dendrite Arm Spacing (SDAS). Four theoretical approaches are used to simulate the endurance limit characterized by a Kitagawa relationship are compared: Murakami relationships [Y Murakami, Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions, Elsevier, 2002.], defect-crack equivalency via Linear Elastic Fracture Mechanics (LEFM), the Critical Distance Method (CDM) proposed by Susmel and Taylor [L. Susmel, D. Taylor. Eng. Fract. Mech. 75 (2008) 15.] and the gradient approach proposed by Nadot [Y. Nadot, T. ~Billaudeau. Eng. Fract. Mech. 73 (2006) 1.]. It is shown that the CDM and gradient methods are accurate; however fatigue data for three loading conditions is necessary to allow accurate identification of an endurance limit.Comment: 27 pages, 11 figure

Barcoding T Cell Calcium Response Diversity with Methods for Automated and Accurate Analysis of Cell Signals (MAAACS)

International audienceWe introduce a series of experimental procedures enabling sensitive calcium monitoring in T cell populations by confocal video-microscopy. Tracking and post-acquisition analysis was performed using Methods for Automated and Accurate Analysis of Cell Signals (MAAACS), a fully customized program that associates a high throughput tracking algorithm, an intuitive reconnection routine and a statistical platform to provide, at a glance, the calcium barcode of a population of individual T-cells. Combined with a sensitive calcium probe, this method allowed us to unravel the heterogeneity in shape and intensity of the calcium response in T cell populations and especially in naive T cells, which display intracellular calcium oscillations upon stimulation by antigen presenting cells

Coupled dipole method to compute optical torque : Application to a micropropeller.

International audienc

Double-clad hollow core photonic crystal fibre for coherent Raman endoscope: imaging chemical bonds without labelling

International audienc