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ICT intensity of use and the geography of firms Inra
Galliano, D.; Roux, P.; Soulié, N..
This paper investigates the relationship between the geography of firms and the intensity of use of information and communication technologies (ICTs). Our approach to the geography of firms is multifaceted, in relation to the various characteristics of their location area(s), to their organisational fragmentation, and to their spatial organisation at a national scale. Making use of a single cross-section dataset drawn from the `ICT and e-commerce' survey for the French industry, we examine firms' decisions to use the Internet more or less intensively. We find that firms' internal fragmentation lead to important variations in the intensity of Internet use. Moreover, we find that firms benefit from urbanisation economies through the location of their...
Tipo: Journal Article Palavras-chave: ICT; INFORMATION AND COMMUNICATION TECHNOLOGIES; GEOGRAPHY; FIRM.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011735ed234&uri=/notices/prodinra1/2011/05/
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Organisational motives and spatial effects in Internet adoption and intensity of use : evidence from French industrial firms Inra
Galliano, D.; Roux, P..
The aim of this study is to examine the reasons why firms use ICTs at varying rates, by making a distinction between the two stages of their diffusion: their adoption and the intensity of their use. What are the differences between Internet adopters (in terms of their internal organization and external environment) that explain the intensity with which they use this technology? Furthermore, do these processes vary according to the type of area in which firms are located (urban vs. rural)? A model of technological diffusion is constructed that merges two types of models: those that concentrate on epidemic effects and the so-called equilibrium models that consider the decision to adopt new technologies as a result of an economic calculation by firms. To test...
Tipo: Journal Article Palavras-chave: ORGANISATIONAL MOTIVES; SPATIAL EFFECTS ; FRENCH INDUSTRIAL FIRMS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20097a57cd2e&uri=/notices/prodinra1/2011/04/
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Tree motion in heterogeneous forests: a coupled flow-tree simulation study Inra
Brunet, Y.; Roux, P.; Dupont, S..
Landscape heterogeneities such as forest edges, clearings or gaps, as well as the presence of topography, induce spatial variations in turbulence properties that may have considerable impact on the aerodynamic sollications exerted on the trees. The heterogeneity in the damages caused by windstorms in forested landscapes can be partly attributed to such spatial variations in windload. We investigate here the impact of landscape heterogeneity on tree motion using a coupled flow-tree modelling approach. The simulation of flow fields is provided at fine spatial and temporal resolution by a large-eddy simulation (LES) model and the simulation of tree movements induced by instantaneous wind forces is provided by a mechanistic, dynamical model of tree behaviour....
Tipo: Conference Paper Palavras-chave: HETEROGENEITE DU PAYSAGE ; DEGAT FORESTIER  LARGE-EDDY SIMULATION; LES.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009a67117d&uri=/notices/prodinra1/2011/05/
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