4,375 datasets found

Un des objets essentiels de l'hydroloqie fluviale est l'étude des régimes des rivières : c' est-à-dire avant tout des débits et de leurs variations au cours du temps....

La condensation à l'équilibre dans les milieux poreux met en jeu l'adsorption et la condensation capillaire. La distribution des dimensions de pores détermine le rôle...

Observations of T Tauri stars show that a majority of them are binary systems. On the other hand, deformation of circumstellar disks have a great influence on the...

Very low mass stars and brown dwarfs are the most numerous stellar population in the Galaxy. Their observations have long been difficult (or even impossible) because...

The study concerns active control methods of the transonic buffet over a supercritical airfoil by using two strategies : thermic and pneumatic. Numerical simulation of...

White adipose tissue development is tightly regulated by pro-and anti-adipogenic factors. In obesity, its increased development leads to many metabolic complications....

The present study is aimed at examining the fantastic as a literary genre by means of a twofold endeavour,which could be seen both as a diachronic (the history of...

The objective of this report is to present a study as complete as possible of the Stark effect in the asymmetric top molecules of X2Y4 type possessing the D2h symmetry...

Hybrid reactors are a new concept for energy production and nuclear waste treatment. Among other requirements, structural materials have to withstand liquid metal...

La connaissance de la structure de l'ammoniac permet d'utiliser les raies d'inversion de la molécule comme moyen d'investigation du mi.lieu interstellaire. En...

This thesis deals with mesoscopic models of cortex called neural fields. The neural field equations describe the activity of neuronal populations, with common...

La turbulence de Langmuir Forte dans les plasmas a de nombreuses conséquences tant dans les applications à la fusion rapide qu'à l'astrophysique. La déduction des...

The angular resolution for ground-based observations is limited by the atmospherie turbulence which deforms randomly the light's wavefront of an astronomical object....

This thesis presents a study of the rotation of low-mass stars (from 0.5 to 1.2 MG) during their pre-main sequence - from T Tauri ages, at a few million years old -...

Décrire théoriquement l'activité chimique complexe du milieu interstellaire et calculer les abondances moléculaires qui en découlent, est un des aspects d'une étude...

Cometary Globules are small dense clouds commonly found in the surroundings of OB stars in HII regions. We present a detailed study, both numerical and analytical, of...

The work reported in this thesis focuses on biomolecules immobilization for the development of multiparametric analysis tools on a biochip coupled with a colorimetric...

Uncertainty hangs over rural households in developing countries. This thesis aims first to better understand the consequences of vulnerability on behavior and also to...

Two complementary techniques coexist today to observe sea-level variations. Satellite altimetry observes sea-level on near-global and regular spatial and temporal...

The major part of the information available on the web is provided in textual form, i.e. in unstructured form. In a context such as technology watch, it is useful to...