COURS DE FAISCEAUX HERTZIENS GRATUIT PDF

Structure et.. The European Union has used its powers to intervene in areas relating to the media, but in mergers and in the television without frontiers directive it has left it to the Member States to take measures to ensure the protection of pluralism. The agreement was reached by involving Chinese and European wine producers, with support from Brussels and Beijing, EU agriculture commissioner Dacian Hertzines said. The loan was expressly for the purchase of Huawei products.

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At first the Direct Broadcasting by Satellite is presented and its working principle compared to the one of minowaves beams. The satellite scenery is summarily described : geostationnary satellite characteristics, and satellite classification according to their mission and to their power.

Then the configuration of a hub station is described, and finally some pieces of advise are given about the choice of a configuration according to the planned use. In broadcasting more than one hundred and twenty hours of live programmes during the 93 school year, the C. Schoolchildren have been involved in such programmes since New programmes have been broadcasted this year for students registered with the CNED, and also for law students in France and abroad.

All these different programmes for different audiences are based on the same concept : live video programmes broadcasted by satellite which combine presentations with dialogues between the audience and the contributors. An evaluation of the practice shows the importance of a thorough preparation and demonstrates that VT1 gains its true value when it is supported by mediators and integrated within consistent processes of teaching and training : thus, motivation, social and cultural relationship are achieved.

To know its audiences and their needs better, to improve the rigour and the professionalism of its teaching staajf, as well as its technical teams, are the objectives assigned to the CNED, in order to succeed in widening its range of teaching and training aids efficiently.

Jean Duchaine — Jean-Claude Bellet. Cet article se veut une photographie des pratiques du CNED dans ce domaine, de ses interrogations et de ses perspectives. Faisceaux hertziens et satellites. Figure 1. Transmissions par faisceau hertzien et par satellite. Figure 2. Figure 3. Principaux constituants d'une station. Dans sa configuration la plus simple, une station satellite comprend :. Les VTI : typologie -production. Principe de fonctionnement. Globalement le principe technique est le suivant :.

Figure 4. Les principaux types de publics sont :. Le cadre organisationnel -la production. Les autres types de VTI de formation. Impacts et usages. Plan 1. Faisceaux hertziens et satellites [link] 1. Les VTI : typologie -production [link] 2. Principe de fonctionnement [link] 2. Typologie [link] 2. Impacts et usages [link] 3. Conclusion [link] Bibliographie [link]. Liste des illustrations Figure 1. Transmissions par faisceau hertzien et par satellite [link] Figure 2.

Principaux constituants d'une station [link] Figure 4. Transmissions par faisceau hertzien et par satellite 1. Les VTI : typologie -production 2. Impacts et usages 3. Notes 1.

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