Search results for " Spatial"
showing 10 items of 582 documents
Endogenous growth and regional growth (Approaches to a theory of spatial endogenous growth)
1994
L'objectif de cet article est de poser les différents principes préalables à la construction d'une théorie spatiale de la croissance endogène. Dans cebut, plusieurs étapes sont présentées.1/ L'analyse des théories macroéconomiques de la croissance endogène permet de mettre en évidence le rôle clé des externalités d'agglomérations.2/ Mettre en parallèle, les mécanismes de croissance endogène et de croissance régionale permet d'identifier les composantes spatiales de lacroissance. A cet égard, le concept de capital spatial est défini.3/ Enfin, les principes fondamentaux attachés à la dynamique de population, à l'accumulation du capital spatial et à l'émergence des économiesd'agglomération son…
Évolution des structures spatiales récurrentes des températures quotidiennes en Bourgogne.
2011
6 pages; International audience; L’objectif est de définir, à partir de 24 stations météorologiques, différentes structures spatiales récurrentes de larépartition des températures minimales (Tn) et maximales (Tx) en Bourgogne. Après avoir désaisonnalisé les séries detempératures, une Classification Hiérarchique Ascendante (CHA) est utilisée pour regrouper les jours ayant des structuresspatiales similaires. Huit classes ont été définies, quatre pour les Tn et quatre pour les Tx. Pour les deux variables, ellesidentifient les cas de gradient thermique (i) Nord-Ouest/Sud-Est, (ii) Sud-Est/Nord-Ouest, (iii) altitudinal positif et (iv)altitudinal négatif. Les fréquences d’occurrences de ces struc…
Peptide–Membrane Interactions Monitored by Fluorescence Lifetime Imaging: A Study Case of Transportan 10
2021
The interest on detailed analysis of peptide-membrane interactions is of great interest in both fundamental and applied sciences as these may relate to both functional and pathogenic events. Such interactions are highly dynamic and spatially heterogeneous, making the investigation of the associated phenomena highly complex. The specific properties of membranes and peptide structural details, together with environmental conditions, may determine different events at the membrane interface, which will drive the fate of the peptide-membrane system. Here, we use an experimental approach based on the combination of spectroscopy and fluorescence microscopy methods to characterize the interactions …
L'information géographique au service de la climatologie. Chapitre 1
2007
Les représentations spatiales de concepts scientifiques : inventaire et diversité
1994
The consultation of twelve journals (French and English language) that deal with science education, for the years 1991 to 1993, allowed us to summarize the use of spatial representations of scientific concepts in didactics research. Two main results were produced from this study : there has not been much work published with spatial representations, and what has been published is very heterogeneous. Analysis of this diversity does not always allow us to understand the authors’ objectives and obliges researchers in didactics to think about the nature and role of spatial representations in the construction of scientific knowledge.
Clubs de convergence et effets de débordements géographiques : une analyse spatiale sur données régionales européennes, 1980-1995
2007
Our article offers an econometric model of spatial interactions for the empirical analysis of growth in European regions over the period 1980-1995. The model detects spatial spillover effects and makes it possible to take account of the European economy’s strong polarization. More specifically, by factoring in both spatial autocorrelation and spatial heterogeneity, we characterize the economic polarization pattern in European regions, identify convergence clubs, and model them as spatial regimes. We estimate a two-regime model with spatially autocorrelated errors and show that the convergence process differs between the two regimes. We find a strongly significant spatial spillover effect : …
Estimation des effets de proximité dans le processus de convergence régionale : une approche par l'économétrie spatiale sur 92 régions européennes (1…
2002
L'objectif de cet article est d'examiner les conséquences de la dépendance spatiale sur la croissance régionale et le processus de convergence. Sur un échantillon de 92 régions européennes sur la période 1980-1995, nous montrons que le modèle de b-convergence absolue doit être re-spécifié en raison de la présence d'auto-corrélation spatiale. Les méthodes de l'économétrie spatiale nous orientent vers une spécification avec erreurs spatialement auto-corrélées qui nous permet de mettre en évidence un effet de débordement géographique. Nous montrons ainsi que le taux de croissance d'une région est influencé positivement par les taux de croissance des régions contiguës.
I corpi del virus
2020
In un articolo recentemente uscito in italiano, Bruno Latour spiega che il nuovo coronavirus illustra in modo eclatante come gli attori non umani irrompano nei nostri spazi collettivi esigendo profonde trasformazioni (e invitando a ripensare così noi stessi al loro interno). Al momento è impossibile valutare questi cambiamenti sul lungo periodo. È chiaro però che SARS-CoV-2 ha avuto subito effetti visibilissimi sulle istituzioni che danno forma al nostro universo collettivo: mercati finanziari, filiere produttive, sistemi sanitari, regolamenti, lockdown. Mi sembra che il luogo di convergenza di questi ambiti tematici sia il corpo, figura in cui si incrociano le isotopie mediche, economiche,…
“I want creative neighbours”. Do creative service industries spillovers cross regional boundaries?
2014
The occurrence of creative service industries (CSI) is a strong determinant of differences in wealth amongst European regions. However, it is unknown if the strong effects are limited to occurring within regional boundaries or whether there are spillover effects into neighbouring regions. The purpose of this paper is to assess the existence of CSI spillover effects on the wealth of neighbouring regions. CSI and spillovers are integrated into both an empirical model and an endogenous growth model. Both models are estimated for a sample of 250 regions in the European Union in 2008. We find that most of the effects of CSI take place within regions, although there is also evidence that CSI has …
Crime Analysis of the Metropolitan Region of Santiago de Chile: A Spatial Panel Data Approach
2022
The aim of our work is to determine the influence that socio-economic and demographic factors have had on crimes that have taken place during the period 2010–2018 in the communes of the Metropolitan Region of Chile, as well as the existence of possible spatial or temporal effects. We address 12 kinds of crime that we have grouped into two main types: against people and against property. Our interest focuses on crimes against people, using crimes against property as an additional covariate in order to investigate the existence of the broken-windows phenomenon in this context. The model chosen for our analysis is a spatial panel model with fixed effects. The results highlight that covariates …