The benefits of transmission line switching are well-known in terms reducing operational cost and improving system reliability power systems. However, finding the optimal network configuration is a challenging task due to combinatorial nature underlying optimization problem. In this work, we identify certain "node-based" set that appears as substructure problem then conduct polyhedral study set...

We address the problem of jamming mitigation of multicast communications in multi-channel ad hoc networks. Specifically, we develop two frequency hopping (FH) techniques for establishing multicast communications. These techniques, denoted by KFH and CFH, address the two following problems. First, establishing multicast communications in the presence of a control-channel jamming attack. Second, ...

A wireless ad hoc network consists of a set of wireless devices. The wireless devices are capable of communicating with each other without the assistance of base stations. Space Division Multiple Access (SDMA) is a new technology designed to optimize the performance of current and future mobile communication systems. In this paper, an SDMA-based MAC protocol (S-MAC) for wireless ad hoc networks...

In wireless networks, hidden terminal problem is common and leads to collision which makes it difficult to provide the required quality of multimedia services or support priority based services. To overcome these problems a directional antennas have been extensively used in designing MAC protocols for wireless network. Directional antennas provide many advantages over the classical antennas. In...

In this paper, we study the location routing problem with replenishment facilities (LRPRF), an extension of the location routing problem (LRP) where the vehicles can replenish at some replenishment facilities. Vehicles leave the depot with load on-board, serve customers until out of load, and then either return to a replenishment facility to reload or return to the depot, completing their route...

Salmonella enterica serotype 4,[5],12:i:- (STM) has become an increasing problem for food safety and been often detected in pork products. For this study, weanling pigs were exposed to STM-contaminated feed, water, or air determine possible STM transmission routes. An uninoculated control group of was included. The monitored daily feces rectal nasal swabs. colonization most prevalent tissues fr...

Random Key Distribution (RKD) schemes have been widely accepted to enable low-cost secure communications in Wireless Sensor Networks (WSNs). However, efficiency of secure link establishment comes with the risk of compromised communications between benign nodes by adversaries who physically capture sensor nodes. The challenge is to enhance resilience of WSN against node capture, while maintainin...