The paper describes modern technologies of Computer Network Reliability. Software tool is developed to estimate of the CCN critical failure probability (construction of a criticality matrix) by results of the FME(C)A-technique. The internal information factors, such as collisions and congestion of switchboards, routers and servers, influence on a network reliability and safety (besides of hardw...

This paper discusses the various types of malicious software, particularly computer viruses, which threaten computer network dependability, including such attributes as reliability, availability, safety and security of computer systems. Quantitative risk assessment of computer virus attacks on computer networks is investigated. To this end, an analytical model to study computer virus propagatio...

Estimating the reliability of a computer network has been a subject of great interest. It is a well known fact that this problem is NP-hard. In this paper we present a very efficient combinatorial approach for Monte Carlo reliability estimation of a network with unreliable nodes and unreliable edges. Its core is the computation of some network combinatorial invariants. These invariants, once co...

The evaluation of residual reliability of large sized parallel computer interconnection systems is not practicable with the existing methods. Under such conditions, one must go for approximation techniques which provide the upper bound and lower bound on this reliability. In this context, a new approximation method for providing bounds on residual reliability is proposed here. The proposed meth...

background: sustained visual attention is a prerequisite for learning and memory. the early evaluation of attention in childhood is essential for their school and career success in the future. the aim of this study was to design, development and investigation of psychometric properties (content, face and convergent validity and test-retest and internal consistency reliability) of the computer -...

Reliability is one of the most important concepts in computer networks field. Any network must be supplied with different techniques and methods to guarantee its continuity and functionality under the most sever circumstances. This paper highlights the steps taken at the University of Mosul to enhance the reliability of its computer network. Firstly, the current topology of the network is exami...

This paper constructs a multistate flow network composed of multistate edges to model a computer network. Each edge has lead time, capacity, and cost parameters. Therefore, the minimum transmission time through a single path is not a fixed number. Under the transmission protocol that the data are sent through p (p ≥ 2) minimal paths simultaneously, the minimum transmission time is also stochast...

Chang, Y. -R. , Lin, H. -Y. , Chen, I. -Y. & Kuo, S. -Y. , A Cut-Based Algorithm for Reliability Analysis of Terminal-Pair Network Using OBDD, Proceedings of the 27th Annual International Conference on Computer Software and Applications, 2003. Fard, N. S. & Lee, T. -H. , Cutset enumeration of network systems with link and node failures, Reliability Engineering and System Safety 1999, pp. 141 14...

In recent years, along with rapid developments in technology, computer systems haveincreasingly become more integrated and more modular. Indeed, the reliability and efficiency ofcomputer systems are of high significance. Hence, the quantitative evaluation of the optimizationof reliability indexes in computer systems is considered to be a crucial issue. Reliabilityenhancement of computer systems...