A Wireless Sensor Network (WSN) can be used in a variety of applications, such as in environmental monitoring and in battlefield surveillance in military applications (Akyildiz et al., 2002). A WSN consists of hundreds or thousands of sensors and, depending on the application, the node deployment and placement can be realised either in a deterministic way or randomly. In hostile environments, f...

In sensor networks, sensing coverage is an important issue. For target tracking and event monitoring applications, complete coverage is commonly used as one measure of coverage. However, when sensors are randomly distributed in the area of interest, complete coverage is too sensitive to ∧ the locations of the sensors. In this paper, point coverage is considered as an alternative measure of cove...

Coverage is a fundamental problem in robotics, where one or more robots are required to visit each point in a target area at least once. Most previous work concentrated on finding a coverage path that minimizes the coverage time. In this paper we consider a new and more general version of the problem: adversarial coverage. Here, the robot operates in an environment that contains threats that mi...

The Integrated Child Development Services (ICDS) in the State of Telangana, India, freely provides a fortified complementary food product, Bal Amrutham, as a take-home ration to children 6-35 months of age. In order to understand the potential for impact of any intervention, it is essential to assess coverage and utilization of the program and to address the barriers to its coverage and utiliza...

BACKGROUND Routine administration of all age-appropriate doses of vaccines during the same visit is recommended for children by the National Vaccine Advisory Committee (NVAC) and the Advisory Committee on Immunization Practices (ACIP). METHODS Evaluate the potentially achievable vaccination coverage for ≥4 doses of diphtheria and tetanus toxoids and acellular pertussis vaccine (4+DTaP), ≥4 do...

Intensity-modulated radiation therapy (IMRT) provides the protection of the normal organs and a precise treatment plan through its optimization process. However, the final dose-volume histogram (DVH) obtained by this technique differs from the optimal DVH, owing to optimization convergence errors. Herein, intermediate dose calculation was applied to IMRT plans during the optimization process to...

We address the problem of repeated coverage of a target area, of any polygonal shape, by a team of robots having a limited visual range. Three distributed Clusterbased algorithms, and a method called Cyclic Coverage are introduced for the problem. The goal is to evaluate the performance of the repeated coverage algorithms under the effects of the variables: Environment Representation, and the R...

In the process of coverage for multiple targets, due to the existence of a large number of redundant data make the effective monitoring area coverage decreased and force the network to consume more energy. Therefore, this paper proposes a multi-target kcoverage preservation protocol. First of all, establish the affiliation between the sensor nodes and target nodes through the network model, pre...

It is documented that well-modeled Monte Carlo dose calculation algorithms are more accurate than traditional correction-based algorithms or convolution algorithms at predicting dose distributions delivered to heterogeneous volumes. This increased accuracy has clinical implications for CyberKnife, particularly when comparing dose distributions between the ray-tracing and Monte Carlo algorithms....

Takeover target firms covered by more equity analysts are sold for higher premiums while their acquirers earn lower merger announcement returns. We confirm these results using exogenous shocks to coverage arising from brokerage-house mergers or closures (i.e., quasi-natural experiments) as instruments for the loss of analyst coverage. In general, our findings indicate that target coverage by eq...