This paper examines the importance of requiring a disk resource management mechanism for disconnected services and presents a robust system that embodies several features that are required of such a disconnected framework. Disconnected services in which clients access services in degraded mode (i.e without relying on network connectivity) are important for providing greater service availability...

In this paper, we present an approach for modeling and analyzing the temporal failure and degradation behavior of critical infrastructure systems (CISs) using advanced temporal database management systems. We classify the possible failure and/or degraded performance of CISs into different temporal categories, namely, crisp or exact intervals, nonvanishing imprecise intervals and vanishing impre...

The main object of this paper is to develop a reliability model of a single-unit system operating under two weather conditionsnormal and abnormal. There is a single server who visits the system immediately whenever needed and plays the dual role of inspection and repair. The unit does not work as new after repair at complete failure and so called the degraded unit. The unit is inspected at its ...

This paper derives the optimal level of restorative efforts required to restore environments degraded by invasive species invasion. Specific attention is focused on a case when restoration faces the risk of failure through relapse of the restored environment caused by repeat invasions. The level of restored environment may also play a role in its future improvement or susceptibility to failure....

A Manufacturing cell consists of a machine served by a loading and unloading robot and a pallet handling system, which moves a batch of parts into and out of the system. In this study, a stochastic model is developed to analyze performance measures of a cell, which is allowed to operate under multi-states including degraded mode. The model is used to determine state probabilities of the system,...

This paper proposes the use of machine learning techniques to make storage systems more reliable in the face of sector errors. Sector errors are partial drive failures, where individual sectors on a drive become unavailable, and occur at a high rate in both hard disk drives and solid state drives. The data in the affected sectors can only be recovered through redundancy in the system (e.g. anot...

An IP performance management infrastructure that has the twin frameworks of performance measurement and topology monitoring is proposed. By combining above frameworks, the infrastructure locates performance-degraded segments. Since the Internet is still highly prone to performance deterioration due to congestion, router failure, and so on, not only detecting performance deterioration, but also ...

The computer systems that provide the information underpinnings for critical infrastructure applications, both military and civilian, are essential to the operation of those applications. Failure of the information systems can cause a major loss of service, and so their dependability is a major concern. Current facets of dependability, such as reliability and availability, do not address the ne...

The computer systems that provide the information underpinnings for critical infrastructure applications, such as banking systems and telecommunications networks, have become essential to the operation of those applications. Failure of the information systems will often cause a major loss of service, and so their dependability has become a major concern. Current facets of dependability, such as...