network sensors consist of sensor nodes in which every node covers a limited area. the most common use ofthese networks is in unreachable fields.sink is a node that collects data from other nodes.one of the main challenges in these networks is the limitation of nodes battery (power supply). therefore, the use oftopology control is required to decrease power consumption and increase network acce...

Wireless sensor networks consist of sensor nodes with limited computational and communication capabilities. This paper deals with mobile sensors which are divided into clusters based on their physical locations. Efficient ways of key distribution among the sensors and inter and intra cluster communications are examined. The security of the entire network is considered through efficient key mana...

Modern system identification (SID) procedures rely on fixed sensor networks for data collection. Ideally, sensors are fixed at locations and contain profitable structural responses, however, such sensing areas are often limited by the accessibility of the structure and environmental hazards. Not only are fixed sensor placements limited, the data contains restricted spatial information. Mobile s...

The communication problem is to select a minimal set of placed sensor devices in a service area so that the entire service area is accessible by the minimal set of sensors. Finding the minimal set of sensors is modeled as a vertex-cover problem, where the vertex-cover set facilitates the communications between the sensors in a multi-hop fashion keeping in mind the limited communication range an...

Optical imaging applications often suffer from a combination of low resolution images and expensive or bulky sensors. In traditional imaging, images are only acquired in-focus, forgoing use of additional out-of-focus information. We propose a method to increase the quantity of raw data gathered by a limited number of sensors in a way that will simultaneously allow us to make the most of this ra...

This paper presents a novel scheme for self configured dynamic sensor networks based on zones, where sensor nodes are location aware. Location about which sensors provide information is always more important than identification of sensors. It is vital to deliver this information to sink involving minimum packet processing at intermediate nodes due to limited battery life and bandwidth. This sch...

Several compact sampling platforms have recently been developed or are gaining widespread use in Naval operations and oceanographic research. In addition to limited sensor payloads, many of these platforms are autonomous and intended for extended deployments. Sensors compatible with these platforms must therefore be compact, low power, and able to accommodate effective anti-biofouling measures....

Opportunistic sensing can be used to obtain data from sensors that just happen to be present in the user’s surroundings. By harnessing these opportunistic sensor configurations to infer activity or context, ambient intelligence environments become more robust, have improved user comfort thanks to reduced requirements on body-worn sensor deployment and they are not limited to a predefined and re...

The Wireless Multimedia Sensors Networks (WMSN) are a particular case of the Wireless Sensors Networks (WSN) as they present a lower density, a limited mobility, require more important resources and need especially QoS to transport the multimedia streams. In this paper, we propose, starting from a reference architecture of WMSN, a first approach to organize the routing in a hierarchical way whi...

This paper focuses on how to obtain globally optimal multisensor data association results under the condition that number of targets is unknown. problem likely occur in scenarios where sensors’ fields view (FoVs) are limited. The authors proved that, ideally, cost result a convex function assumed target and with minimal value only if correctly assumed. Based this, multiple hypothesis S-dimensio...