Reviewed

National audience Apres an introduction to the place of the labour force in Spanish agriculture based on statistics given at provincial level, presentation of a first summary of a realised-field search in Western Andalusia, region, or the percentage of salaries in the agricultural population is the...

This scientific volume of Habilitation in Diriger des Recherche summarises the work carried out in the four research laboratories where I have carried out my research since the end of the thesis: the Frontier Research Center for Global Change (FRCGC, Yokohama, Japan), the Centre d’Etudes Spatiales d...

International audience The aim of the work is the analysis of the distribution of different types of the landscapes in the wetland tundra of the Yamal Peninsula. The Yamal Peninsula is important biogeographic region of the Arctic. It is located in the subarctic continental climate zone and crosses t...

This research is one of the few studies that focused on the prevention of musculoskeletal disorders (MSDs) in terms of time organisation of work and determinants related to public policies and ministerial instructions. The objectives were to provide a picture of the temporal requirements of seasonal...

Prognostic simulations of ocean carbon distribution are largely dependent on an adequate representation of physical dynamics. In this work we show that the assimilation of temperature and salinity in a coupled ocean-biogeochemical model significantly improves the reconstruction of the carbonate syst...

This work aims to understand the dynamics of slope debris systems located above the treeline in the eastern Pyrenees. The degree of activity and mode of evolution of these talus slopes is investigated by analysing the relationships that exist between lithophile plant species and slope morphodynamics...

The interaction of tunneling with groundwater is a problem both from an environmental and an engineering point of view. In fact, tunnel drilling may cause a drawdown of piezometric levels and water inflows into tunnels that may cause problems during excavation of the tunnel. While the influence of t...

The seasonal change in mortality study provides valuable insights into the extent to which environmental factors can influence population dynamics. In this work, we present the results for the Chiomonte municipality between 1800 and 1989. Demographic data have been compiled in decennial periods and...

State Administration until 1990 (PTT), La Poste has traditionally used a temporary workforce (auxiliary, vacant, contract staff and from 1967: agency staff) to respond to the variable and seasonal nature of its activities. Now known as a ‘public undertaking’, La Poste continues to use quota workers...

Labour migration during large school holidays is increasingly frequent in West Africa as schooling and school retention extend to rural areas and include the children of the poorest families, girls and boys. Demographic monitoring data in Senegalese countries show a temporal change in the seasonal l...

Based on a multi-sited ethnography, this thesis studies the movements of Malian migrants that arrived to Spain since 1990. The people, their strategies, the locations, and the material and symbolic conditions of their complex movements make also part of this research. Looking into the broad space of...

This thesis reviews the role of fire, and especially its seasonal timing, in the moist savanna forests of mainland Southeast Asia, and, in particular, of Thailand. Based on one year's experimental field work carried out in Uthai-thani Province, West Thailand, the thesis investigates the development...

Air-sea CO2 fluxes over the Pacific Ocean are known to be characterized by coherent large-scale structures that reflect not only ocean subduction and upwelling patterns, but also the combined effects of wind-driven gas exchange and biology. On the largest scales, a large net CO2 influx into the extr...

The Iberá esteros represent one of the largest wetlands in the world. They pass through the province of Corrientes (Argentina) in diagonal form, heading north-south-west. Neiff (2001, 2004) is a macro wetland landscape that combines forests, Pajarios, pastures, lagoons, baths and peatlands thanks to...

In this thesis work, attempts were made to link water quality with hydrophilic communities. To this end, seasonal sampling was carried out in one of the most problematic streams in the city of Neuquén, the Duran stream, a rainvioluvional stream that crosses the city and flows into the Limay river. T...

This work is based on the sedimentological and geochemical study of ten cuts or polls carried out in the Sainte-Victoire piemmonts. It confirms the existence of a pre-historic low holocene terrace probably starting from the Subboréal. After the relatively stable Roman period, the very low medieval t...

International audience Abstract Internal waves in the semidiurnal and near-inertial bands are investigated using an array of seven moorings located over the Reykjanes Ridge in a cross-ridge direction (57.6°–59.1°N, 28.5°–33.3°W). Continuous measurements of horizontal velocity and temperature for mor...

National audience A group of 34 farms specialising in beef farming, selected for their large size from the Réseaux d’Elevage for the Council and the Prospective of the main French breastfeeding ponds, was the subject of a technical and economic study between 2001 and 2003. Analysis of the means of p...

International audience An individual-based model (IBM) of anchoveta (Engraulis ringens) larvae was coupled to a climatological hydrodynamic (Regional Oceanic Modeling System, ROMS) model for central-southern Chile to answer the question as to whether or not across- and alongshore transport off centr...

This study looks at the effectiveness of some usual filters in economics to reduce trend and seasonal components: the moving averages incorporated in the Census Xll method and the differences in the order of d recommended by Box-Jenkins. Spectral and cospectral analyses shall be used to ascertain wh...

International audience The occurrence of biomarker temporal variations linked to environmental factors makes it difficult to distinguish the specific effect of pollution. The present work aims to investigate the seasonal variations of the transport activity of the multixenobiotic defence (MXD), whic...

We propose to question the concept of transnational mobility on the basis of two research projects. The first one notes the journeys made by workers in the hotel and catering sector to Andorra. The second project concerns Portuguese posted workers in the building in France. By comparing these two si...

In order to trace the parameters of the regime over time, we have reconstructed the main hydro-climatic variables used in hydrological forecasting models. The work covers a territory of 3 200 km² covering the La Grande Rivière hydroelectric complex. Trees occupying sites sensitive to water variation...

Based on the ‘bricklayer regulations’ kept in the archives of the cathedral chapter and a number of other factory accounts, it is possible to keep pace with the work of building workers: on the one hand, seasonal changes in working time per day (number and duration of breaks) can be seen; on the oth...