Search results for "espaces"
showing 10 items of 41 documents
Integrable systems and moduli spaces of curves
2016
This document has the purpose of presenting in an organic way my research on integrable systems originating from the geometry of moduli spaces of curves, with applications to Gromov-Witten theory and mirror symmetry. The text contains a short introduction to the main ideas and prerequisites of the subject from geometry and mathematical physics, followed by a synthetic review of some of my papers (listed below) starting from my PhD thesis (October 2008), and with some open questions and future developements. My results include: • the triple mirror symmetry among P 1-orbifolds with positive Euler characteristic , the Landau-Ginzburg model with superpotential −xyz + x p + y q + z r with 1 p + …
The household location in multicenter urban spaces
1991
In multicenter urban spaces, the household location problem is to find an optimal location taking into account the locations of several economic centers.In this article, we show that the usual model, maximizing a residential utility under a budget spatial constraint, can’t give a satisfactory solution.So, we construct a fuzzy spatial model, including imprecision in consumer’s behavior. This model allows us to find an optimal location in a multicenter urban setting. Then, an empirical study illustrates the performances of the fuzzy model.
Entités fonctionnelles, entités spatiales et dynamique urbaine dans la longue durée
2004
Functional Features, spatial Features and the urban Dynamic across a long Lapse of Time. Heterogeneous data from different sources are to be formalised as functional and spatial features in order to study the spatial evolution of preindustrial cities in the « longue durée ». The aim is to establish a distinction between historically relevant functional features and geographically relevant spatial features in order to produce information better adjusted to study spatial dynamics. The elements of a methodology are brought up.
La ville et le crime : espaces et temporalités. L'exemple de Paris (XIXe-XXe siècles)
2007
Optimisation des requêtes de similarité dans les espaces métriques répondant aux besoins des usagers
2012
The complexity of data stored in large databases has increased at very fast paces. Hence, operations more elaborated than traditional queries are essential in order to extract all required information from the database. Therefore, the interest of the database community in similarity search has increased significantly. Two of the well-known types of similarity search are the Range (Rq) and the k-Nearest Neighbor (kNNq) queries, which, as any of the traditional ones, can be sped up by indexing structures of the Database Management System (DBMS). Another way of speeding up queries is to perform query optimization. In this process, metrics about data are collected and employed to adjust the par…
Espace physique et espace social intimement liés : initiatives autour des sports et loisirs à Montceau-les-Mines durant la première moitié du XXe siè…
2018
Lieux de vie, de travail, de loisirs, d’engagements pluriels, de confrontation et de compétition, les espaces sociaux sont objets d’attachement mais aussi déterminants et reflets de l’activité des individus.Les conditions d’émergence et de développement des espaces sociaux, comme les nombreuses déclinaisons du rapport des individus et de leurs collectifs aux lieux qu’ils investissent, sont au cœur de ce livre, fruit d’une recherche pluridisciplinaire associant historiens, sociologues, politistes, socio-psychologues, spécialistes de l’aménagement du territoire.Tour à tour, plusieurs univers sont explorés : mondes populaires, banlieues, organisations militantes, terrains de l’action publique……
Territories linking places and communities in the transition to sustainable development
2014
Ecoviles a Espanya: buscant una transformació social emancipadora?
2020
Segons dades de la Global Ecovillage Network (2018), l'Estat espanyol és actualment el segon país més important del món, després dels Estats Units, en nombre d'ecoviles, la xifra de les quals no ha cessat de créixer al llarg dels darrers anys. Seguint la teoria d'Erik Olin Wright sobre transformacions socials emancipadores, tractarem la qüestió de si aquest boom representa una mostra d'una transformació social incipient i d'un canvi cultural que està experimentant el medi rural. Aquest treball es divideix en cinc seccions principals. La primera introdueix el problema, per abordar tot plegat la metodologia realitzada per a l'estudi de 29 ecoviles a Espanya utilitzant sis variables sobre inte…
Un modèle radiocentrique pour l'analyse des espaces ruraux périurbains
1995
Research on periurbanisation’s factors, a phenomenon that has greatly contributed to the demographic growth of French rural areas for the last twenty-five years, leads us to ask about the determinants of residential location in rural areas of people working in a town. In order to answer this question, it is necessary to transpose residential location models usually used at the scale of the town - models which are the basis of the New Urban Economics school - to periurban areas. The area we are interested in is differentiated both from urban and rural areas seen from the agricultural production point of view. But we show that it can be analyzed in the same manner as urban areas. However, thi…
Economies d'agglomération et configurations spatiales dans les espaces ruraux
1997
The question to be addressed here is that of the agglomeration/dispersion forces that are likely to account for the location of people and jobs in rural areas and the way they explain spatial patterns in rural areas depending on urban influence. Economic geography models may provide suitable tools with which to investigate the organization of rural areas. We first review these models, focusing on dispersion forces, which rest basically on land consumption and transport costs. We suggest then a set of hypotheses concerning the main forces at work in rural areas. Intensity of agglomeration economies is hypothesized to be related to the urban size, which in turn induces increasing land rents a…