Search results for "dynamique"

Plasma Membrane Dynamics in Plant-Microbe Interactions

2017

Dynamic instability in absence of dominated splittings.

2006

We want to understand the dynamics in absence of dominated splittings. A dominated splitting is a weak form of hyperbolicity where the tangent bundle splits into invariant subbundles, each of them is more contracted or less expanded by the dynamics than the next one. We first answer an old question from Hirsch, Pugh and Shub, and show the existence of adapted metrics for dominated splittings.Mañé found on surfaces a $C^1$-generic dichotomy between hyperbolicity and Newhouse phenomenons (infinitely many sinks/sources). For that purpose, he showed that without a strong enough dominated splitting along one periodic orbit, a $C^1$-perturbation creates a sink or a source. We generalise that last…

Normativité des choix sociométriques et différences sociodynamiques dans la représentation sociale des relations entre nations européennes

2007

Exploring sociometric between 39 different nationalities within Europe, we identified a social representation of relationship between these nations.

Controlling rotational dynamics of molecules by shaped ultra-short laser pulses

2004

This manuscript presents various studies falling under the set of themes of coherent control. We establish, as well theoretically as in experiments, the possibility of finely handling the rotational dynamics of linear molecules. In order to operate this handling, the ultra-short pulses are shaped by a pulse shaper. Its principle and its installation are described in a detailed way. The rotational dynamics of the linear nitrogen molecule (N2) is handled while exploiting the relative excitation between the even and odd rotational components of the wavepacket in weak mode of field. That, we chose a periodic phase modulation well defined of the exiting pulse. A temporal analysis comes to clarif…

Contribution to the development and the improvement of a digital model of the human body biofidelic HUByx by numerical methods for impact applications

2017

The study of human tolerance thresholds to impacts requires experiments on living or post mortem human subjects, which naturally raises ethical questions. To overcome these limitations, the development of numerical tools has led over the last few years to the implementation of numerical models more or less capable to accurately reproduce the mechanical behavior of the human body when subjected to various types of stresses. It is in this context that the numerical model HUByx (Hermaphrodite Biomechanics yx-model) has been developed within the research department COMM of the ICB lab at UTBM. This PhD work aims at validating and improving the biofidelity of the thoracic part of the HUByx model…

Système distribué d'alerte de la qualité de l'eau pour la rivière Mudan basé sur l'EFDC et les SIG

2016

Simulation and Early Warning System (SEWS) is a powerful tool for river water quality monitoring. Mudan River, an important river in northeastern cold regions of China, can run out of China into Russia. Thus, the water quality of Mudan River is highly concerned not only locally andregionally but also internationally. Objective of this study is to establish an excellent SEWS of water quality so that the spatio-temporal distribution of water quality in both open-water and ice-covered periods can be accurately simulated and visualized to understand the spatial variation of pollutants along the river course. The dissertation is structured into 7 chapters, chapter 1 outlines the background of th…

Dynamique concurrentielle entre une méta-organisation et l'un de ses principaux membres : le cas FIFA/UEFA

2022

Urban dynamics, mobilities and transport in the Algerian Southwest (wilayas of Adrar and Bechar)

2012

Between a regional perspective of the territorial (spatial) planning and a geopolitical vision of the region " Sahel, the Maghreb ", the Algerian State made a commitment since the second decade of its independence not only to develop transport in the Saharan zones but also to set up the necessary equipments for the economical and social development of these zones, by serving almost the totality of the urban areas. In the Southwest, this dynamics remodelled profoundly the relational space in Saoura, Gourara and Touat.Structured formerly by the roads of the trans-Saharan caravan business, this space opens up, attributes new functions and becomes urbanized. A new reorganization of the space is…

Trois modèles pour mieux comprendre la localisation des commerces de détail en milieu urbain

2003

Three models are proposed to offer a better understanding of urban retail location dynamics. Each corresponds to one step in a methodological progression, the presentation of which is the central concern of this paper. The first step consists in modelling the general processes behind urban retail location patterns. The second step identifies the main retail location rules and defines the structure of the third model. Whereas the results of the two first steps are mainly conceptual, the mathematical nature of the last model allows for simulations.

Identity dynamics and social partitions : the case of identity "racial" Blacks in France

2011

Our research work investigates - from a psycho-social point of view - the «racial» identity of the black population in France, notably in their relation with the white population, so as to point up the identity dynamics that exist between the various groups. The theoretical framework is related to social grouping and one of its developments, i.e. the concept of social partitioning. Such conception is based on the existence of several types of inter-category relations (partitioning) that allow apprehending the nature of individuals’ identity positioning within the framework of an inter-group relation and make it dynamic through the notion of co-construction. Our methodology is based mainly o…