A new method for estimating the relative positions of location-unaware nodes from the location-aware nodes and the received signal strength (RSS) between the nodes, in a wireless sensor network (WSN), is proposed. In the method, a regularization term is incorporated in the optimization problem leading to significant improvement in the estimation accuracy even in the presence of position errors ...

Flying Ad-Hoc Network (FANET) is a hot topic in current research. The design of routing mechanism challenging because when the scale Unmanned Aerial Vehicle (UAV) nodes large, vast amount overhead may lead to network collapse. An elastic proposed for large-scale small UAVs multitasking scenarios. Firstly, New-Unifying Connected Dominating Set (N-UCDS) algorithm construct virtual backbone based ...

background & objectives: colon cancer is currently of high incidence and mortality rate. identifying the factors influencing its prognosis can be very beneficial to its clinical treatment. recent studies have shown that lymph nodes ratio can be considered as an important prognostic factor. the aim of the present study is to investigate the effect of this factor on the prognosis of the patie...

Nowadays, wireless sensor networks are often deployed on the sea surface for ocean scientific monitoring. One of the important challenges is to localize the nodes' positions. Existing localization schemes can be roughly divided into two types: range-based and range-free. The range-based localization approaches heavily depend on extra hardware capabilities, while range-free ones often suffer fro...

Localization for mobile wireless sensor networks has been intensively studied in recent years due to its many applications in mobile networking as well as various public safety problems. However, the complexity of indoor radio propagation, especially when considering mobile users, makes indoor positioning a challenging task. This is mainly due to the severe multipath phenomenon where multiple c...

Long-term monitoring of an environment is a fundamental requirement for most wireless sensor networks. Owing to the fact that the sensor nodes have limited energy budget, prolonging their lifetime is essential in order to permit long-term monitoring. Furthermore, many applications require sensor nodes to obtain an accurate estimation of a point-source signal (for example, an animal call or seis...

Recently, the current Received Signal Strength based positioning systems have been designed to monitor the location information of mobile nodes and Patients. The positioning systems are designed with different wireless communication technologies and adapted algorithms in wireless network area. The adaptive algorithms improve the accuracy of location of mobile nodes in RSS (Received Signal Stren...

PURPOSE To investigate dextran-coated superparamagnetic iron oxide particles (BMS 180549) as an MR contrast agent for assessing lymph nodes. METHODS Five different doses ranging from 0.3 to 1.7 mg Fe/kg were evaluated in five healthy human male subjects as part of a phase 1 clinical study. T1-, T2-, and proton density-weighted spin-echo images as well as multiplanar gradient-echo and spoiled ...

In this paper, we propose a network-based distributed antenna array approach, in which a bit-interleaved rectangular parity-check coded modulation with an iterative demodulation scheme is used. Different from conventional multiplearray systems, this distributed array employs a pair of physically separated identical receiving nodes. These nodes receive the transmitted signal through independent ...

Confining an answer to the question whether and how the coherent operation of network elements is determined by the the network structure is the topic of our work. We map the structure of signal flow in directed networks by analysing the degree of edge convergence and the overlap between the inand output sets of an edge. Definitions of convergence degree and overlap are based on the shortest pa...