Search results for "Echelle"

Modèle dynamique multiniveau et holonique pour la simulation d'un système complexe à grande échelle avec environnement spatial : Application à la sim…

2020

Nowadays, with the emergence of connected objects and cars, road traffic systems become more and more complex and exhibit hierarchical behaviours at several levels of detail. The multilevel modeling approach is an appropriate approach to represent traffic from several perspectives. Multilevel models are also an appropriate approach to model large-scale complex systems such as road traffic. However, most of the multilevel models of traffic proposed in the literature are static because they use a set of predefined levels of detail and these representations cannot change during simulation. Moreover, these multilevel models generally consider only two levels of detail. Few works have been inter…

Définir, modéliser et évaluer la durabilité des territoires

2019

Mesure du transport narratif dans le contexte d’une expérience de consommation transmédia

2018

This research offers a French narrative transportation scale measuring the experience of transmedia devices in the arts and cultural field. First, based on a literature review of the definition and measure of narrative transportation, a new scale is presented and defended. Second, a qualitative study is conducted. The dimensions of narrative transportation are confirmed and items are generated to measure it. Results from factorial analysis leading to a reliable and valid scale of narrative transportation lived by the cultural consumer through the use of a transmedia device are presented.

Convergence et divergence comparées du salaire des enseignants du primaire dans l'échelle de développement économique

2008

Remunerations for primary teachers along the scale of economic development: convergence or divergence ?The relative distribution of wages at the aggregate level, without reference to individual characteristics, is linked both to structural aspects in local labour markets and the burden of history that makes that profession remains paid differently as compared to others. The teaching profession for the primary school has several characteristics of interest, it is a common profession, nearly one percent of labour force and whose conditions and qualifications are relatively close around the world. This text is dedicated to measure the relative pay off for teachers. Mainly, the position for a n…

Analyse de la distribution spatiale des implantations humaines : apports et limites d’indicateurs multi-échelles et trans-échelles

2020

As human beings, it is easy for us to judge visually whether a distribution is dispersed or concentrated. However, the quantitative formalization of our impressions is problematic. It depends on the scales of the chosen analysis. This dependence of indicators on scales has changed. It is initially considered as a barrier to knowledge, it now reflects the multi-scale organisation of the distributions studied. The central objective of this thesis is to investigate the limits and contribution of multi-scale and trans-scale indicators to the study of the spatial distributions of human settlements.Spatial analysis aims at comparing spatial distributions to a uniform distribution. The way in whic…

Cosmologie des théories de gravite modifiées

2017

The study of physical cosmology has reached an exciting era. For the first time in human history, a quantitative model for the formation and the evolution of the Universe exists, which explains a wide range of phenomena and has been tested with incredible accuracy during the last century. Moreover, weare approaching a time when a bounty of high quality cosmological data will be available,allowing us to use cosmology as a tool to test fundamental physics.In particular, as the large-scale structures of the Universe are governed by gravity, cosmology can help us to asses the correctness of Albert Einstein’s general relativity. This idea fueledmost of the work described in this manuscript,in wh…

CARTOGRAPHY OF AGROCLIMATIC INDICES AT MESOSCALE LEVEL: METHODOLOGY AND CASE STUDY OF BORDEAUX WINEGROWING AREA. Implications on vine development and…

2007

Climate spatial variability knowledge is essential in agronomy and forestry, in order to characterize production potential or to assess pest development risks. In viticulture, climate mainly governs grapevine development rate and berry ripening. The aim of the present work is to characterise climate spatial variability at mesoscale level, using several spatialization techniques at daily time step, applied to climate variables and agroclimatic indices, in order to evaluate its consequences on grapevine development and grape ripening. This study was led in the Bordeaux winegrowing region. Six variables were studied: minimum and maximum temperatures, solar radiation, reference evapotranspirati…

Relevance of modelling for assessing spatial and temporal effects of GMOs - upscaling

2007

International audience; Gene flow is a common phenomenon for crop species and its implications for Genetically Modified Plants have raised new concerns. Undesirable effects related to gene flow may result in ecological or agronomic considerations (persistence of feral plants, creation of new weeds; impacts on biodiversity) as well as in commercial considerations (adventitious presence of GMOs in conventional crop production affecting its competitiveness in the marketplace). Consequently, the coexistence between different types of crops has become a major issue and has to be addressed per se whatever are the actual ecological, agronomic and safety impacts. On-farm gene flow occurs both in ti…

Analyse multi-échelles de compromis entre services écosystémiques fournis par la flore adventice

2018

National audience; Les adventices, étant à la base des réseaux trophiques, jouent un rôle important dans les processus biologiques mis en avant en agroécologie. Cependant, elles sont également en compétition avec les cultures, il est donc important de s’intéresser aux compromis entre les services et diservices qu’elles fournissent. Pour cela, nous allons nous intéresser au suivi d’une plateforme paysagère, regroupant près de 150 parcelles contiguës de grandes cultures. Un suivi des pratiques agricoles ainsi que des relevés de flore à l’interface et à l’intérieur de la parcelle y sont réalisés depuis 2008. Les services/diservices fournis par les commuanutés observées peuvent ensuite être dét…