introduction:with increasing threats of weapons of mass destruction (wmd) in future war especially biological threats against our country necessity of using novel technologies in crisis management against new warfare’s is very important. passive defense as a peaceful and preventive strategy without any warfare is able to not only monitor the prospect of new warfare specially biological warfare ...

One of the fundamental challenges in P2P (Peer to Peer) networks is to protect peers’ identity privacy. Adopting anonymity scheme is a good choice in most of networks such as the Internet, computer and communication networks. In this paper, we proposed an anonymity scheme based on pseudonym in which peers are motivated not to share their identity. Compared with precious anonymous scheme such as...

The heterogeneity of current and future industrial communication networks for Distributed Computer-Controlled Systems (DCCS) brings up interoperability problems. Therefore, there is the need to provide the appropriate mechanisms to achieve full interoperability between nodes (End Systems) belonging to different types of networks, such as Fieldbus, Industrial Ethernet and wireless networks. This...

In the same way that classical computer networks connect and enhance the capabilities of classical computers, quantum networks can combine the advantages of quantum information and communication. We propose a nonclassical network element, a delayed commutation switch, that can solve the problem of switching time in packet switching networks. With the help of some local ancillary qubits and supe...

as wireless networks with high data rate get widely deployed, improving the performance of tcp over these networks plays vital role. wireless link losses have dramatic adverse impact on tcp performance due to the difficulty in distinguishing the congestion losses from wireless link losses. we first, studied the various existing bandwidth estimation algorithms over the wireless networks. in this...

If we think of the graph as modeling a network, the vulnerability measure the resistance of the network to disruption of operation after the failure of certain stations or communication links. Many graph theoretical parameters have been used to describe the vulnerability of communication networks, including connectivity, integrity, toughness, binding number and tenacity.In this paper we discuss...

This paper considers the wavelength assignment problem for Cartesian product networks with multi-hops. An upper bound of the (uniform) wavelength index for Cartesian product networks with single-hop is established. This result leads to a consequence for the nth power of an arbitrary network with k-hops. In particular, if k = 1, this bound partially generalizes the results of Pankaj [R.K. Pankaj...

the purpose of this descriptive- correlational research was to investigate factors affecting use of information and communication technology (ict) by agricultural extension experts. the statistical population of the study consisted of the agricultural extension experts in the khorasane razavi province out of whom 196 individuals were taken as sample, using cochran formula and proportional strat...