Gilberto A. Urueta

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Cost-efficiency is a critical factor for citywide deployments of WiFi networks that are being planned by telecom operators and governments around the world. Building such networks by reusing the broadband infrastructure, currently used only by the mass costumer at home, is an attractive approach to follow. We tackle the problem of selecting locations from(More)
0957-4174/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.eswa.2011.01.141 ⇑ Corresponding author. Address: Department of S cations, Universidad de Alcalá, 28871 Alcalá de Henare 885 6731; fax: +34 91 885 6699. E-mail address: sancho.salcedo@uah.es (S. Salcedo This paper presents the application of a Hybrid Grouping Genetic Algorithm (HGGA) to solve(More)
In this paper we describe the application of a Hybrid Grouping Genetic Algorithm (HGGA) to the recent challenge of deploying metropolitan wireless networks, exploiting existing broadband infrastructure, by openingWiFi-enabled customers' DSL routers to third parties, or WiFi network Design Problem or WiFiDP. The application of a HGGA to this problem aims to(More)
Massive growth of home wireless networking revives the opportunity to achieve citywide ubiquitous wireless access by building a WiFi overlay based on the principle of broadband sharing. This kind of large-scale overlay network poses new challenges for wireless network planning. In this scenario, the number of possible locations to install public hotspots is(More)
Tuberculosis continues to cause significant morbidity and mortality in developing nations. As a first step in defining the magnitude of the problem in Peru, we determined the prevalence of tuberculin sensitivity in an age-stratified, community-based population on the outskirts of Lima in December 1990. The overall prevalence of 10 mm or more induration in(More)
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