|With the increasing popularity of wireless communication systems, customers are expecting the same level of service, availability and performance from the wireless communication networks as the traditional wire-line networks. Traditional pure performance model that ignores failure and recovery but considers resource contention generally overestimates the system's ability to perform a certain j...

In this paper we investigate the effect of three time-triggered system rejuvenation policies on service availability using a queuing model. The model is formulated as an extended stochastic Petri net using a variety of distributions for times between state changes. We define a metric for steady-state service availability and derive how it can be estimated from the models. We further analyze tim...

Interval availability is a dependability measure defined by the fraction of time during which a system is in operation over a finite observation period. The system is assumed to be modeled by a finite Markov process. Because the computation of the distribution of this random variable is very expensive, it is common to compute only its expectation. In this paper, we propose a new algorithm to co...

Reliability is an important consideration in the planning, design and operation of engineeringsystems. As the size and complexity of mining equipment continue to increase, the implica-tions of equipment failure become ever more critical. One method to mitigate the impact offailures is to improve the reliability of the equipment. One of the purposes of system reliabil-ity analysi...

Businesses today are becoming increasingly dependent on information technology (IT) to meet business-critical demands. Due to this dependency, the computing solution chosen must prove to be highly available, have scalable performance as well as being easily managed. A low cost approach being taken to accomplish this is to cluster multiple industry standard servers together in such a way as to a...

In recent years, reliability, availability, and capacity have become critical issues in power plants industries. It is also becoming a challenge to meet the demand without the expansion of aged power plants. This paper presents availability analysis of the power generation systems in cogeneration plants situated in Kuwait. Furthermore, an overview of the current situation about Kuwait power pla...

Availability of business-critical application servers is an issue of paramount importance that has received special attention from the industry and academia. To improve the availability of application servers, we have conducted a study of virtualization technology and software rejuvenation that follows a proactive fault-tolerant approach to counter act the software aging problem. We present Mar...