Search results for "environnemen"
showing 10 items of 328 documents
Présentation du projet V(e)T [Villes en Transition] au sein du Programme MOVIDA
2012
National audience
The Spatial Dimension of Environmental Spillovers on Housing Prices: The Case of the Basse-Loire Estuary in France
2015
International audience
Communication engageante et représentations sociales : une application en faveur de la protection de l’environnement et du recyclage
2010
International audience; L’objectif de cette étude est de comparer l’efficacité de plusieurs stratégies de communication, à l’articulation du paradigme de la communication engageante et de la théorie des représentations sociales, afin d’inciter de jeunes sportifs à agir pour la protection de l’environnement. Une étude pilote a d’abord permis d’identifier les éléments centraux et périphériques de la représentation sociale de la protection de l’environnement. Ensuite, une expérience a été réalisée et les résultats vont dans le sens attendu. D’une part, les participants placés en communication engageante expriment des attitudes et des intentions comportementales plus favorables envers le recycl…
Measurement of the intergranular corrosion growth kinetics on a 2024 aluminium alloy : new experimental approaches of damage as function of the envir…
2017
Costs of aeronautical maintenance can be reduced by implementation of “smart” inspection strategies integrating predictive data on the evolution of defects such as the propagation rate of intergranular corrosion.In this work, intergranular corrosion damage on 2024 aluminium alloy was characterized by two modes : the “perforating” damage (dissolution of the grain boundary tips) and the “blunting” damage (dissolution of the grain walls in the intergranular cavities). To evaluate the “perforating” damage, a new version of the TFP method (OTFP method) which is more complete, was designed. The OTFP method allows to detect all the intergranular corrosion defects and not only the fastest full pene…
Towards visual urban scene understanding for autonomous vehicle path tracking using GPS positioning data.
2019
This PhD thesis focuses on developing a path tracking approach based on visual perception and localization in urban environments. The proposed approach comprises two systems. The first one concerns environment perception. This task is carried out using deep learning techniques to automatically extract 2D visual features and use them to learn in order to distinguish the different objects in the driving scenarios. Three deep learning techniques are adopted: semantic segmentation to assign each image pixel to a class, instance segmentation to identify separated instances of the same class and, image classification to further recognize the specific labels of the instances. Here our system segme…
Dissolved silica in the Garonne River waters : changes in the weathering dynamics
2000
The major ion chemistry of the Garonne River is indicative of seasonal variations in the weathering dynamics of the drainage basin. Using the geochemical model MEGA for calculation of the contribution of atmospheric CO2 to the total bicarbonate fluxes exported by the Garonne River allows estimations of the concentrations of the major dissolved elements that originate from silicate- and carbonate-rock weathering. The molecular ratio SiO2/Al2O3 was calculated for the 1989–1992 period to identify the main type of weathering in the Garonne River, and montmorillonite was shown to be the major mineral occurring in the weathering products. The seasonal variations of the SiO2/Al2O3 ratio also showe…
Where Alonso meets Sierpinski: an urban economic model of a fractal metropolitan area
2004
International audience; La coexistence d'activités résidentielles et agricoles dans des ceintures périurbaines caractérise de nombreuses aires métropolitaines modernes. Malheureusement, peu de modèles théoriques de l'économie urbaine prennent en compte ce type de mixité spatiale. L'article contribue à combler cette lacune : les auteurs présentent un modèle de localisation résidentielle (standard en économie urbaine) opérant dans un espace structuré par la géométrie spatiale. Plus précisément, d'un côté, un tapis de Sierpinski est utilisé pour rendre compte de l'organisation hiérarchisée de sites urbains et ruraux dans une aire métropolitaine. D'un autre côté, un ménage maximise, sous contra…
Taking socio-ecology at its word: two ethical foundations for the "socio-ecological" approach confronted to the specific case of a large LTSER
2018
[Departement_IRSTEA]Eaux [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiples; International audience; Poster scientifique présenté à un colloque de recherche en science et management sur les enjeux socio-écologiques (Garden Route Interface Meeting). Ce poster présente les objectifs, méthodes et résultats principaux du projet de recherche BIBLI-OHM (mars-juillet 2018): une étude de la trajectoire, des influences et des perspectives de la Zone Atelier Bassin du Rhône et de son Observatoire Hommes-Milieux à partir de l'analyse d'un corpus pluriannuel de ses publications.
Scientific studies conducted to understand, improve the soil and increase its yield despite the current unfavorable environmental context.
2022
Consequences of sown grass margin strip on weed flora
2010
The intensification of the management of weed populations, led by a potential decrease in the yield and quality of crop harvest, has largely induced their decline in arable zones across the last decades. This floristic decline in arable landscape, has induced a loss of a larger biodiversity because the presence of others organisms (birds, insects, mammals) are strongly linked with the abundance of trophic resources as weed are. To counter with this loss of biodiversity and to limit the negative impacts of farming practices on environment, numerous agri environmental schemes were launched through Europe. In France, sown grass strips were established by farmers along streams and rivers to lim…