Internet et performance de l’entreprise: Étude de l’organisation industrielle de 104PME en Loire-Atlantique

What is the influence between Internet and the enterprise performance? This study presents the relationship between the Internet applications (web, business intelligence, e-commerce, internal communication, cross-companies cooperation) and growth and profit of Small and Medium Enterprises (SMEs). If a direct “impact” is tested, an indirect relationship is nevertheless submitted to a test through intermediary variables i.e. industrial organization according to Pavitt (1984) and the structure. The study of 104SMEs in Loire-Atlantique (France) did not find any direct “impact” of Internet applications on enterprise performance. On the other hand, an indirect influence was found, especially through the specific use of Internet bySMEs belonging to “mass production”, “specialized supplier” and “high tech” industries.     

Les terminaux de télécommunication face à l’environnement radioélectrique

This paper presents the work being carried out in the Emc field for the new telecommunication terminals so that the french telecommunications network should not be disturbed and a good service quality could be maintained even in presence of high level radio frequency ambients.     

Variations des dimensions des feullets en fonction de l’altitude

Annals of Telecommunications - As cours de la deuxième partie de cette série d’articles on a étudié un certain nombre de paramètres relatifs aux feuillets stables et...     

Cartographie distribuée du cœur de l’Internet

The study of the Internet topology allows us to discover properties that can be beneficial to the performances of network protocols and applications. Thus, Internet mapping is very useful to simulation software focusing on network protocols. Unfortunately Internet mapping has two major drawbacks. First it takes a lot of time to be carried out and second it is often incomplete. To solve these two problems, we have developed a fast mapping software whose aim is to map the heart of the Internet as fast as possible with the highest attainable precision. In this paper, we describe our software and evaluate its performances compared to an existing and freely available mapping software. We assess the completeness of the router level maps by creating overlays with an autonomous system topology. We also assess its use inIpv6 and the evolution of its performances inIpv4 when increasing the size of the input parameter set. We conclude with a detailed study on the delay of the paths and links in the Internet.