Wireless Local Area Network (WLAN) can provide high data-rate wireless multimedia applications to end users in a limited geographical area and has been widely deployed in recent years. For indoor WLAN systems, how to efficiently improve service coverage is a challenging problem. In this paper, we propose a coverage improvement scheme that can identify suitable Mobile Stations(MS) in good servic...

With recent advances in electronics and wireless communication technologies, the Wireless Sensor Networks (WSNs) are being used in wide range of applications of military, ecological, health related areas. Due to their resource constraints such as, sensor node’s size, memory, and processing capabilities, the scale of deployment of WSNs requires careful decisions with respect to various performan...

OBJECTIVES This study reports on the results of a large-scale targeted condom social marketing campaign in and around areas where female sex workers are present. The paper also describes the method that was used for the routine monitoring of condom availability in these sites. METHODS The lot quality assurance sampling (LQAS) method was used for the assessment of the geographical coverage and...

Next generation networks consider context information to deliver personalized services, where this context can include positioning information. On the other side, positioning information is relevant to some of the network main functions: geographical routing, network coverage, enhanced security, power saving etc. Therefore determining the position of nodes in wireless networks is pivotal and th...

BACKGROUND Implementation of known effective interventions would necessitate the reduction of malaria burden by half by the year 2010. Identifying geographical disparities of coverage of these interventions at small area level is useful to inform where greatest scaling-up efforts should be concentrated. They also provide baseline data against which future scaling-up of interventions can be comp...

Current wireless access control solutions make use of long-term secrets, such as user passwords and private keys, incurring non-trivial management costs while being incapable of defining physical limits for wireless coverage. In this paper we describe an architecture that replaces long-term secrets with overprovisioning, using higher densities of access points in order to provide location-based...