The aim of this paper is to provide qualitative models characterizing interdependencies related failures of two critical infrastructures: the electricity infrastructure and the associated information infrastructure. The interdependencies of these two infrastructures are increasing due to a growing connection of the power grid networks to the global information infrastructure, as a consequence o...

Multi-version programming is employed in faulttolerant computer systems in order to provide protection against common-mode failure in software. Multi-version programming involves building diverse software implementations of critical functions. The premise of building diverse versions is that the likelihood of a programming error in one version causing a failure in an identical manner as an erro...

Reliability optimization problem has a wide application in engineering area. One of the most important problems in reliability is redundancy allocation problem (RAP). In this research, we worked on a RAP with repairable components and k-out-of-n sub-systems structure. The objective function was to maximize system reliability under cost and weight constraints. The aim was determining optimal com...

• A comprehensive quantitative evaluation of common cause failures is performed for safety-critical digital control systems; Both hardware and software are tracked identified; Failure probabilities systems estimated via a multiscale reliability analysis approach. The impact to plant safety evaluated. Digital instrumentation (DI&C) at nuclear power plants (NPPs) have many advantages over analog ...

Network survivability, reflecting the ability of a network to maintain an acceptable level of service during and after failures, is an important requirement for WDM optical networks due to the ultrahigh capacity. The most common network failure is the link failure which could cause enormous data loss and lots of service disruption to Internet users. Although single-link failures are the most co...

A partition {Ci}i∈I of a Boolean algebra S in a probability measure space (S, p) is called a Reichenbachian common cause system for the correlated pair A, B of events in S if any two elements in the partition behave like a Reichenbachian common cause and its complement, the cardinality of the index set I is called the size of the common cause system. It is shown that given any correlation in (S...