Search results for "VRE"

Contribution to the development of 100% bio-based composites : synthesis of bio-based polyepoxides, supercritical CO2 treatment of hemp fibers and im…

2018

This thesis contributes to the development of 100% bio-based hemp/epoxy composites. Current environmental issues favor the emergence of materials derived from renewable resources such as plant fibres and a wide range of bio-based building-blocks, source of epoxy prepolymers in particular. An intensive investigation of the two constituents (hemp fibres and polyepoxidic matrix) is carried out before the composites manufacturing. Supercritical CO2 treatment is applied to hemp fibres used as reinforcement in composite materials. This treatment, not optimized, leads to better individualization as well as a decrease in the hygroscopic power of the fibres. These aspects, which are essential in ord…

Lignes et points : Illustration, impressionnisme littéraire et procédés

2020

International audience; Cette conférence a porté de manière générale sur les rapports entre illustration et procédés de reproduction. Elle est plus précisément consacrée à l’utilisation de la photogravure dans le livre illustré britannique de la fin du 19ème siècle. L’exemple choisi est le recueil d’essais London Impressions (Constable, 1898) d’Alice Meynell, illustré par l’artiste britannique William Hyde. Peintre et aquafortiste, Hyde collaborait avec l’inventeur écossais Donald Cameron-Swan (1863-1951) de la Swan Electric Engraving Company, spécialisée dans le cliché trait comme dans le cliché simili. À la croisée de pratiques autographiques et d’opérations mécaniques, la photogravure al…

Contribution to the development of natural fibers' use in structural composites. Study of a Flax / Epoxy composite’s behavior when exposed to hygroth…

2018

In recent years there is renewed interest for bio-sourced composites, including those based on flax fibers, and especially in the field of transport, mobility and leisure. In fact, the lower energy cost and environmental impact of flax fiber give it an advantage over glass fiber, while competing with its specific mechanical properties. However, flax fibers based composites long-term behavior remains poorly known in damp environments and constitutes an obstacle to a wider use. This work aims to provide adapted parameters to produce a high-grade flax/epoxy composite and to contribute to improve the durability knowledge of these materials. First, the influence of many processing parameters [(i…

Adeus a Georges Moustaki

2013

Lembro-me de momentos felizes, no nosso apartamento do Rio, na Equitativa, em Santa Teresa: os raios do sol que, das janelas, batiam nas paredes brancas, numa atmosfera ao mesmo tempo fresca e quente; eu desenhando em papéis, paredes, capas de LPs, quadro negro, cada traço representando para mim uma primeira idéia de luto, pois sabia que estes desenhos desapareceriam logo e para sempre.

RVVS 2013

2013

Le système technologie, marché du travail et gestion de la main d'oeuvre : l'exemple de l'industrie électrique et électronique française au Brésil

1983

Partial melting of metabasic rocks in Val Strona di Omegna, Ivrea Zone, northern Italy

2014

Field and petrographic observations combined with major and trace element bulk rock geochemistry show that metabasic rocks within Val Strona di Omegna in the central Ivrea Zone partially melted during granulite facies regional metamorphism. A transition from granoblastic amphibolite facies metabasic rocks at the lowest metamorphic grades to metatexitic and diatexitic migmatites in the granulite facies records the effects of in situ fluid-absent partial melting. Coarse-grained euhedral clinopyroxene porphyroblasts within leucosomes are consistent with anatexis via incongruent fluid-absent melting reactions consuming hornblende, plagioclase and quartz to form clinopyroxene and melt. Field obs…

Phase equilibrium constraints on a deep crustal metamorphic field gradient: metapelitic rocks from the Ivrea Zone (NW Italy)

2011

The metamorphic rocks of the Ivrea Zone in NW Italy preserve a deep crustal metamorphic field gradient. Application of quantitative phase equilibria methods to metapelitic rocks provides new constraints on the P–T conditions recorded in Val Strona di Omegna, Val Sesia and Val Strona di Postua. In Val Strona di Omegna, the metapelitic rocks show a structural and mineralogical change from mica‐schists with the common assemblage bi–mu–sill–pl–q–ilm ± liq at the lowest grades, through metatexitic migmatites (g–sill–bi–ksp–pl–q–ilm–liq) at intermediate grades, to complex diatexitic migmatites (g–sill–ru–bi–ksp–pl–q–ilm–liq) at the highest grades. Partial melting in the metapelitic rocks is consi…

Pour une démarche prospective en quatre étapes : une expérience régionale, une collaboration européenne, un secteur d'activité

2001

A prospective approach along four lines : a regional experience, an European collaboration, a sector of activity The prospective approach must be based on a shared diagnosis, which combines quantitative and qualitative data, serves as main theme in order to suggest some strategies of actions. At the moment here is not a real labour shortage in the hotel and catering sector in Burgundy. The main problem is to improve the conditions and organisation of the work time in order to reduce the employees' leaving from the industry.

Le système technologie, marché du travail et gestion de la main d'oeuvre : l'exemple de l'industrie électronique et électrique française au Brésil

1983

International audience