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The purpose of this thesis is to study magnetic reconnection in collisionless and relativistic plasmas. Such plasmas can be encountered in various astrophysical objects (microquasars, AGNs, GRBs...), where reconnection could explain high-energy particle and photon produ...

In the last decades embedded systems have been challenged with more and more application variety, each time more constrained. This implies an ever growing need for performances and energy efficiency in arithmetic units. This work studies solutions ranging from hardware ...

The present thesis focuses on the study of the song not in its word and music dialectic but through the acquisition of a third entity : the vocal rendition. The point is to reveal its critical importance and richness and make it legitimate as a subject of study as the r...

Since the scientific studies of Lancelot in 1968 on “electoral abstention” in France; it is within the scope of interpretation of the phenomenon, a stratification paradigms grouped into two logical points of view: sociological and political. After the inventory of those...

The purpose of this study is to determine what place was given to the practice of medicine ans health professionals in Western princely courts of the late Middle Ages, through the example of the court of dukes of Burgundy Valois, from the accession of Philip the Bold in...

The Montessori method of education was created at the beginning of the last century by Maria Montessori to help children in a disadvantaged neighborhood of Rome in Italy. Although it is nowadays most commonly found in private schools, the Montessori method has gained po...

The LES-Langevin model was studied on turbulent channel flows. The approach is based on the dynamics of the subgrid velocity scales previously studied in the frame of Rapid Distortion Theory. The subgrid stress tensor is modeled through a combination of a turbulent forc...

Money has a paradoxal statute in economic theory. To solve barter constraints it is supposed to appear in a barter economy and, once instituted, it has an accessory role. To construct this money genesis model authors imagined the barter economy to enhance its limits. Re...

In this research study, we will explore the learning characteristics of students of different cognitive styles of secondary education (15-17 years old) in China. Several studies, including our latest research, have highlighted the fact that students of different cogniti...

Multiphase permanent magnet synchronous machines (PMSMs) have started to be used more and more in the electrification of transportation systems. These systems have several specific requirements such as: high efficiency, high power density, high functional reliability, r...