35 research outputs found
Innovation sociale et diffusion dans lâĂ©conomie sociale et solidaire Ă travers lâexemple de Social Planet
En 2014, la Loi française Ăconomie sociale et solidaire-ESS donne lescontours de lâinnovation sociale sans pour autant aborder les difficultĂ©s de diffusion et dâinstitutionnalisation particuliĂšrement prĂ©gnantes dans lâESS. LâexpĂ©rience de la plateforme collaborative Social Planet montre que des outils Ă©mergent pour mĂ©diatiser des innovations sociales et interroge les tensions existantes entre la valorisation et la diffusion de lâinnovation sociale dans lâESS, ainsi que la place des collectivitĂ©s publiques dans le dĂ©veloppement de lâinnovation sociale
Analyse thĂ©orique et empirique du dispositif de crĂ©dit solidaire et dâaide sociale du CrĂ©dit Municipal de Nantes
Analyse thĂ©orique et empirique du dispositif de crĂ©dit solidaire et dâaide sociale du CrĂ©dit Municipal de Nantes in GlĂ©main, P., Le microcrĂ©dit 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