Recent investigations into resilience of large-scale highperformance computing (HPC) systems showed a continuous trend of decreasing reliability and availability. Newly installed systems have a lower mean-time to failure (MTTF) and a higher mean-time to recover (MTTR) than their predecessors. Modular redundancy is being used in many mission critical systems today to provide for resilience, such...

CERN is working on a new particle accelerators that will require a very large number of power converters. In that view, the reliability of the whole powering will be a major issue. The use of a redundancy and modularity may help increasing the overall machine availability. However, the reliability of the redundancy system must be high enough to add a significant improvement when compared to sim...

Reliability analysis is a key problem in wireless sensor networks (WSNs). The primary contribution of this paper is an in-depth study of the reliability of a chain topology wireless sensor network with multiple-sending scheme. We study the wireless link reliability for the fading channels. The node energy availability for the source and relay nodes is investigated in terms of the limited node e...

Software systems are becoming increasingly more complex and testing it to a reliable system requires a great deal of effort. Stochastically testing promises a solution to this increased testing burden and gives the opportunity to analyze reliability, mean time to failure etc. Today there is hundreds of reliability models with more models developed every year. Still, there exist no models that c...

This paper presents an asymptotic analysis of a stochastic manufaturing system consisting of parallel machines subject to breakdown and repair and facing a constant demand, as the rates of change of the machine states approach in nity. This situation gives rise to a limiting problem in which the stochastic machine availability is replaced by its equilibrium mean availability. The long-run avera...

Reliability is an important concern for software dependability. Quantifying dependability in terms of reliability can be carried out by measuring the continuous delivery of a correct service or, equivalently, of the mean time to failure. The novel contribution of this paper is to provide a means to support reliability design following the principles of the Model Driven Architecture(MDA). By doi...

Plasma concentrations of 170H-progesterone were determined in 60 normal newborn infants aged between 3 and 36 hours. Mean levels decreased rapidly during this time after removal of the placental contribution of this steroid. A further 70 normal infants, studied between ages 2 and 7 days, showed a mean plasma 170H-progesterone concentration of 3.5 nmol/l (1.2 ng/ml). By comparison, plasma concen...

This paper is aimed at analyzing the possible power options and configurations for remote locations in the oil and gas industry with the view of proposing a cost effect power supply option suitable for the different operational requirements at these remote locations. It reviews the different power options available and presents selection criteria for the optimum choice of power generation techn...

Trade-O Dhiraj K. Pradhan Nitin H. Vaidya Department of Computer Science Texas A&M University College Station, TX 77843-3112 fpradhan,[email protected] Abstract Performance and reliability achieved by a modular redundant system depend on the recovery scheme used. Typically, gain in performance using comparable resources results in reduced reliability. Several highperformance computers are not...

Reliability has always been an important concern in the design of engineering systems. Recently proposed formal reliability analysis techniques have been able to overcome the accuracy limitations of traditional simulation based techniques but can only handle problems involving discrete random variables. In this paper, we extend the capabilities of existing theorem proving based reliability anal...