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Ítem Análisis de irradiación electromagnética en las inmediaciones de una radio base sectorizada en condiciones andinas(Universidad Icesi, 2006-10-11) García Ariza, Alexis PaoloFor more than a year now, the Radio GIS Research Group, assisted by the Schools of Electrical, Electronic and Telecommunications Engineering (E3T) at UIS, together with other local research groups (i.e. ICESI´s I2T, UFPS’s GIDT, and UDI’s MAXWELL, and the Colombian Ministry of Communications have been conducting a number of studies on high-frequency electromagnetic radiation under outdoor conditions to determine acceptable human exposure levels to this kind of radiation. These studies are driven not only by academic interest in this subject, but also by concerns raised by communities in the city of Bucaramanga and other regions in Colombia with respect to the installation of a large number of radiocommunications stations. With this paper, the Radio GIS group makes some contributions, which will hopefully benefit both the population in general and the regulatory agencies, aiming at establishing control policies based on concrete theoretical and technical studies. The results of the studies discussed in this paper derive from previous research conducted in the field of electromagnetic propagationÍtem Planificación de una red DVB-H en entorno urbano(Universidad Icesi, 2007-08-01) Gómez Barquero, David; García Ariza, Alexis Paolo; Cardona Marcet, Narcís; Monserra, José F.; Salieto, ArianaThis article analyzes the problem of DVB-H based mobile TV network planning, and specifically, the deployment cost minimization issue. The article presents the planning studies for a DVB-H network in the city of Valencia (Spain). A TV broadcasting tower and the base stations of a 3G cellular phone service provider were considered as the broadcasting sites. The network under studyinvolves synchronized transmitters at all the broadcast sites. In order to Þ nd network conÞ gurations yielding maximum coverage and minimum costs, a genetic multiobjective based algorithm was used. The obtained results show a high density of transmitters is needed in order to achieve satisfactory coverage levels in indoor environments, hence, the reusage of telecommunications infrastructure is a key factor in reducing the network deployment costs.