Bearings are a common component and crucial to most rotating machinery. Their failures the causes for more than half of total machine failures, each with potential cause extreme damage, injury, downtime. Therefore, fault detection through condition monitoring has significant importance. Since initial cost standard techniques such as vibration signature analysis is high long payback period, via ...

Recent pension reforms in Europe have implemented a link between retirement age and life expectancy. The accurate forecast of tables expectancy is hence paramount for governmental policy financial institutions. We developed multi-population mortality model which includes cause-specific environment using Archimedean copulae to dependence various groups causes death. For this, Dutch data on cause...

The main effort of the present study is to analyze the availability and reliability of a high-performance linac (linear accelerator) conceived for Accelerator-Driven Systems (ADS) purpose and to suggest recommendations, in order both to meet the high operability goals and to satisfy the safety requirements dictated by the reactor system. Reliability Block Diagrams (RBD) approach has been consid...

My research interests span the areas of software engineering, web technologies, and program analysis. Particularly, I focus on using search-based techniques to automatically repair presentation failures (UI problems) in web applications. Presentation failures are ubiquitous in modern web applications and can cause serious usability problems or significantly distort the intended appearance of a ...

This paper presents a common cause failure (CCF) defense approach for safety instrumented systems (SIS) in the oil and gas industry. The SIS normally operates in the low demand mode, which means that regular testing and inspection are required to reveal SIS failures. The CCF defense approach comprises checklists and analytical tools which may be integrated with current approaches for function t...

This paper presents reliability and availability analysis of a k-out-of-(M+S): G warm standby system with time varying failure and repair rates in presence of commoncause failure. The system composed of two categories of components. One category of the components is of type 1 has M components and the other is of type 2 has S components. Type 1 have a lower failure rate. Markov method is used to...

Nowadays there is need of high performance of computer system in distributed environment. As the system mean time before failure correspondingly drops, applications must checkpoint frequently to make progress. However, at scale, the cost of checkpointing becomes prohibitive. A solution to this problem is multilevel checkpointing, which employs multiple types of checkpoints in a single run. Ligh...