abstract—in this paper, the problem of secure transmission in two-hop amplify-and-forward (af) systems with an untrusted relay is investigated. to prevent the untrusted relay from intercepting the source message and to achieve positive secrecy rate, the destination-based cooperative jamming (dbcj) technique is used. in this method the destination sends an intended jamming signal to the relay. t...

Heating saving energy plays a very significant role in the energy saving industry. CANbus is a modern system in reliability improvement design concept which shows the transmission distance is longer than ordinary methods, and it can hang node on the optional position in availability distance. The nodes are linked in parallel, and not interfere with each other. By using the CANbus technology, th...

This paper proposes an integrated real time fault analysis tool for transmission line. The two primary techniques used in the fault analysis tool, uzzy adaptive resonance theory (ART) neural network and synchronized sampling, can offer accurate fault detection, classification, internal/external ault differentiation, and fault location. The paper makes several extensions of the two techniques so...

In this paper, we propose a grouping-proof protocol for RFID tags based on secret sharing. Our proposed protocol addresses the scalability issue of the previous protocols by removing the need for an RFID reader to relay messages from one tag to another tag. We also present a security model for a secure grouping-proof protocol which properly addresses the so called mafia fraud atttack. Mafia fra...

In order to analyze the operation of the protection system during induced fault testing in the Croatian power system, a simulation using the CAPE software has been performed. The CAPE software (Computer-Aided Protection Engineering) is expert software intended primarily for relay protection engineers, which calculates current and voltage values during faults in the power system, so that relay p...

in order to evaluate the effect of nitrogen absorption and use efficiency in relay intercropping for winter wheat and maize, a field experiment was conducted during 2008-2009 at the agricultural research station of ferdowsi university of mashhad, iran. a randomized block design with three replications was used. treatments included four combinations of relay intercropping of wheat and maize (thr...

The most important characteristic of RFID-based electronic voting system compared to traditional voting system is that votes in the electronic system are as contactless smart cards in place of paper ballots. For casting ballots, voters use a computer terminal to write their choices (their chosen candidates) into contactless smart cards and then put the smart card inside the box. The most import...

BACKGROUND: Distance protections are widely used in protection of energy transmission lines, but their time coordination is still an important and difficult problem. Inappropriate configuration leads to a hazard event: remote circuit breaker tripping provided the local circuit breaker can be opened, which severely impairs power system operation. OBJECTIVE: To describe a method and provide softw...

In this paper, we propose a new distributed routing protocol designed for multi-channel wireless networks. The proposed routing method consists of two major parts, relay and sub-channel assignment to find the largest spectral efficiency, and relay selection in each hop, using a probability base scheme. The PBS improves the accessibility by reducing the number of hops and traversed distance in t...

Energy limitation is a critical issue in wireless ad hoc networks. Researchers have developed some power-aware mechanisms in routing area to prolong the lifetime of connections in networks. The existed poweraware routing protocols often use residual energy, transmission power, or link distance as the metrics to select an optimal path. The investigation in this paper indicates that these route s...