Key distribution is an important problem in wireless sensor networks where sensor nodesare randomly scattered in adversarial environments.Due to the random deployment of sensors, a list of keys must be pre-distributed to each sensor node before deployment. To establish a secure communication, two nodes must share common key from their key-rings. Otherwise, they can find a key- path in which ens...

The advances in digital circuitry and sensor technology has enabled reliable monitoring of environments through wireless microsensor systems. Event-driven operating system has been shown to meet the requirements of such platforms. In this paper, we focus on TinyOS, an eventbased operating system for Smart Dust networked sensors. We show how to model TinyOS as a hybrid automata with the tool HyT...

A new frame structure to operate hybrid SWIPT in the hierarchical WPSN configuration is presented. The divided into Wireless Power Transfer (WPT) and Information (WIT) slots, each sensor node adaptively utilizes PS or TS mode allocated slot based on node's dispersed energy.

Hybrid ad hoc networks consist of two kinds of nodes, regular nodes and nodes with additional capabilities. For example, multi-hop cellular and wireless Internet networks consist of static or mobile nodes and access points to a fixed infrastructure. Each node may access fixed infrastructure either directly or via other nodes in multi-hop fashion. Another example is heterogeneous sensor networks...

direct regenerations by using mature cotyledonary node as a explants has been shown to be time-saving and convenient strategy for micropropagation of soybean. so we have evaluated regeneration protocol through single shoot using cotyledonary node as a rapid and efficient protocol for two soybean cultivars and one mutant line. cotyledonary nodes explants obtained from 7-days-old in vitro seedlin...

Performance gain achieved by adding mobile nodes to a stationary sensor network for target detection, depends on factors such as the number of mobile nodes deployed, mobility patterns, speed and energy constraints of mobile nodes and the nature of the target locations (deterministic or random). In this paper, we address the problem of distributed detection of a randomly located target by a hybr...

Active monitoring of a network’s congestion level can be coupled with network-level traffic control to maximise usage of bandwidth resources and avoid congestion. Explicit signalling between nodes has been introduced in literature to enable novel congestion control schemes. In this paper, we present a hybrid scheme to support distributed congestion avoidance, in which explicit feedback signalli...

In this paper, we propose a routing protocol for mobile ad hoc networks called Contact-based Hybrid Routing (CHR) protocol where each node maintains potential routes to the nodes which it encountered. Only one route request message is forwarded along the potential route maintained by the source to the destination. In forwarding the route request message, if an intermediate node finds that the p...

The relaxed semantics and rich functionality of one-sided communication primitives of MPI-3 makes MPI an attractive candidate for the implementation of PGAS models. However, the performance of such implementation suffers from the fact, that current MPI RMA implementations typically have a large overhead when source and target of a communication request share a common, local physical memory. In ...