In this paper, a formal model for antivirus update agent system is presented based on mobile agent technology and predicate/transition Petri nets. The mobile agent system contains two mobile agents called DCA and UNA. It sends out agents to update antivirus on client computers in a network. Each agent takes on a specified responsibility. First, DCA roams through the network and check the last d...

Network reliability is one of the most important concepts in this modern era. Reliability characteristics, component significance measures, such as Birnbaum importance measure, critical risk growth factor and average factor, network stability communication system have been discussed paper to identify components network, also quantify impact failures. The study proposes an efficient algorithm co...

background: co-authorship is one of the most tangible forms of research collaboration. a co-authorship network is a social network in which the authors through participation in one or more publication through an indirect path have linked to each other. the present research using the social network analysis studied co-authorship network of 681 articles published in journal of research in medical...

We investigate reliability of network-type systems under the assumption that the network has K > 1 types of of i.i.d. components. Our method is an extension the D-spectra method to K dimensions. It is based on Monte Carlo simulation for estimating the number of system failure sets having ki components of i-th type, i = 1, 2, . . . , K. We demonstrate our approach on a Barabasi-Albert network wi...

A new approach to the joint selection of primary and secondary routes in a network with unreliable components is presented. The mathematical model captures the changes in the operational characteristics of the network when it adapts to failures. Lagrangean relaxation and subgradient optimization techniques are used to obtain good heuristic solutions to the problem, as well as lower bounds to be...

Translating neural activity into nucleic acid modifications in a controlled manner harbors unique advantages for basic neurobiology and bioengineering. It would allow for a new generation of biological computers that store output in ultra-compact and long-lived DNA and enable the investigation of animal nervous systems at unprecedented scales. Furthermore, by exploiting the ability of DNA to pr...

The installation and configuration of a new network component is a difficult task due to the heterogeneous nature of today’s telecommunication networks. This task requires substantial effort and extensive expertise on the part of the network administrator because he has to set hardware and software attributes for a variety of such components to make them work together. We propose a solution to ...