Construindo sentidos e possibilidades: a experiência da equipe de incubação de um empreendimento solidário

Esta pesquisa qualitativa teve por objetivo analisar a experiência da equipe de incubação de um empreendimento solidário de usuários de saúde mental. As entrevistas ocorreram com sete membros da equipe, sendo os dados analisados segundo análise de conteúdo. Da análise emergiram quatro categorias: Considerando a incubação como um processo - aprendendo e encontrando os significados de ser apoio; Apontando facilidades e dificuldades no processo de construção do empreendimento; Visualizando resultados da inclusão pelo trabalho - percebendo a melhora dos usuários; Apontando necessidades de mudanças no processo, esperando uma maior autonomia dos usuários e a formalização do empreendimento. A experiência revelou ser um trabalho novo e gratificante para a equipe, possibilitando aprendizado, troca de saberes e vínculo. Identificamos o papel do técnico como educador/facilitador do processo. Além das facilidades e do reconhecimento da relevância do trabalho para a vida dos usuários, a equipe enfrenta desafios para gerar renda satisfatória

Méthode de détermination de la courbe charge-tassement pour les fondations superficielles dans les sables

Briaud et Jeanjean ont proposé une méthode pour la détermination de la courbe charge-tassement pour fondations superficielles en 1994. Cette méthode était limitée aux fondations carrées superficielles, soumises à des charges monotones verticales appliquées au centre de la fondation, installée sur la surface horizontale d’un sable. Cet article présente une évaluation de la précision de cette méthode et son extension au cas de fondations rectangulaires, de fondations encastrées, de fondations près d’une pente, de charges excentrées, et de charges inclinées. La précision est évaluée en comparant le comportement prévu et mesuré de 18 essais de fondations. La méthode aux éléments finis et le modèle hyperbolique de Duncan-Chang (1970) sont utilisés pour établir les facteurs nécessaires pour inclure les effets de taille, de forme, d’encastrement, d’excentricité, d’inclinaison, et de la proximité d’une pente

Flavour-selective localization in interacting lattice fermions

A large repulsion between particles in a quantum system can lead to their localization, an effect responsible for the Mott insulator phases in strongly correlated materials. In a system with multiple orbitals, an orbital-selective Mott insulator can form, where electrons in some orbitals are predicted to localize while others remain itinerant. Here we demonstrate a more general version of this phenomenon by observing flavour-selective localization in an atom-based quantum simulator. Our experiment realizes Fermi-Hubbard models with an SU(3) symmetry that can be broken using a tunable coupling between flavours. We observe an enhancement of the localization associated with a selective Mott transition and the emergence of flavour-dependent correlations. Our realization of flavour-selective Mott physics demonstrates the potential of cold atoms to simulate interacting multicomponent materials such as superconductors and topological insulators.A Mott insulator forms when strong interactions between particles cause them to become localized. A cold atom simulator has now been used to realize a selective Mott insulator in which atoms are localized or propagating depending on their spin state

Photocatalytic oxidation of deposited sulfur and gaseous sulfur dioxide by TiO2 films

Thick (4 μm) films of anatase titania are used to photocatalyze the removal of deposited films of amorphous sulfur, 2.8 μm, thick and under moderate illumination conditions (I = 5.6 mW cm-2) on the open bench the process is complete within 8 or 18 h using UVC or UVA light, respectively. Using UVA light, 96% of the product of the photocatalytic removal of the film of sulfur is sulfur dioxide, SO2. The photonic efficiency of this process is 0.16%, which is much higher (>15 times) than that of the removal of soot by the same films, under similar experimental conditions. In contrast to the open bench work, in a closed system the photocatalytic activity of a titania film toward the removal of sulfur decreased with repeated use, due to the accumulation of sulfuric acid on its surface generated by the subsequent photocatalytic oxidation of the initial product, SO2. The H2SO4-inactivated films are regenerated by soaking in water. The problems of using titania films to remove SO2 from a gaseous environment are discussed briefly

Development of the Dragonfly Mass Spectrometer (DraMS) for Titan

International audienceDragonfly Mass Spec / In early days of life looks / Ahead to Titan

Development of the Dragonfly Mass Spectrometer (DraMS) for Titan

International audienceDragonfly Mass Spec / In early days of life looks / Ahead to Titan

Development of the Dragonfly Mass Spectrometer (DraMS) for Titan

International audienceDragonfly Mass Spec / In early days of life looks / Ahead to Titan