BACKGROUND Infant immunisation is an effective public health intervention to reduce the morbidity and mortality of vaccine preventable diseases. However, some developing countries fail to achieve desirable vaccination coverage; Afghanistan is one such country. The present study was performed to evaluate the progress and variation in infant immunisation coverage by district and region in Afghani...

Advances in sensor and communication technologies have made it possible to manufacture small sensors with sensing, processing, and wireless communication capabilities in a costeffective fashion. A sensor network can be formed by deploying specialized sensors in the region of interest to perform certain sensing and networking tasks. Application scenarios of wireless sensor networks include battl...

We study the problem of target tracking and boundary detection of a substance diffusing from a mobile source (e.g., spread of a toxic gas from a moving vehicle) using a wireless sensor network. We present a predictionbased mobility adaptive tracking (P-MAT) algorithm to study the tradeoff between energy, accuracy of tracking, coverage, and boundary estimation. P-MAT minimizes overall energy con...

Suppose the variable X to be predicted and the learning sample Y" that was observed have a joint distribution, which depends on an unknown parameter 0. The parameter 0 can be finite or infinite dimensional. A prediction region Dn for X is a random set, depending on Yn, that contains X with prescribed probability a. This paper studies methods for controlling simultaneously the conditional covera...

A temporal coverage operation computes the duration that a moving object covers a spatial area. We extend this notion into temporal coverage aggregates, in which the spatial area covered for a maximum or minimum amount of time by a moving region, or set of moving regions, is discovered. We define the max temporal aggregate coverage operation and the min temporal aggregate coverage operation. We...

Coverage is one of the main research interests in wireless sensor networks (WSN), it is used to determine the quality of service (QoS) of the networks. Therefore this paper aims to review the common strategies use in solving coverage problem in WSN. The strategies studied are used during deployment phase where the coverage is calculated based on the placement of the sensors on the region of int...

BACKGROUND Due to intensified measles immunization efforts, measles mortality has decreased substantially worldwide, particularly in Sub-Saharan Africa (SSA). The World Health Organization (WHO) estimated a 92% decrease in measles-related deaths in the WHO AFRO region for the period 2000-2008. Recently, the AFRO region established a measles pre-elimination goal and experts have suggested engagi...