In this paper we study the steady state availability of main k-out-of-n: F and secondary subsystems having general repair time distribution. When more than k units of main subsystem fail, then the main subsystem shuts off the secondary subsystem. The life time distributions of the main units and that of secondary subsystem are exponentially distributed. A repair facility having single repairman...

This paper examines cost effective high availability systems based on standardized CompactPCI backplanes. This bus technology allows a fine-grained structural redundancy by hot-swapping peripheral boards at runtime. To quantitatively evaluate the availability of such a system, several models based on Generalized Stochastic Petri Nets have been created which take into account inter-component dep...

This paper describes the design of a network le service that is tolerant to fail-stop failures and can be run on top of a standard network le service. The fault-tolerance is completely transparent , so the resulting le system supports the same set of heterogeneous workstations and applications as the chosen standard. To demonstrate that our design can provide the beneet of highly available les ...

The main aim of many security algorithms is to provide security to the data that we store. These algorithms provide security only untill the intruder gets hold of the file.With advancements in technology, any security mechanism can be cracked within a specified time period. In our paper we propose an alternative mechanism to this kind of security provision. We propose that the file be splitted ...

This paper presents component importance analysis for virtualized system with live migration. The component importance analysis is significant to determine the system design of virtualized system from availability and cost points of view. This paper discusses the importance of components with respect to system availability. Specifically, we introduce two different component importance analyses ...

Plant root systems are highly plastic in their development and can adapt their architecture in response to the prevailing environmental conditions. One important parameter is the availability of phosphate, which is highly immobile in soil such that the arrangement of roots within the soil will profoundly affect the ability of the plant to acquire this essential nutrient. Consistent with this, t...

The availability equivalence factors of a general repairable parallel-series system are discussed in this paper considering the availability function of the system. The system components are assumed to be repairable and independent but not identical. The life and repair times of the system components are exponentially distributed with different parameters. Two types of availability equivalent f...

background & aim :facilitating people’s access to necessary health services is one of the most important strategies to reach social justice within countries’ health system. therefore in-time access to health cares and ensuring desirable results are essential. this study was conducted to evaluate the perception of martyrs’ parents of accessing the services of health monitoring plan. materials an...

Redundancy technique is known as a way to enhance the reliability and availability of non-reparable systems, but for repairable systems, another factor is getting prominent called as the number of maintenance resources. In this study, availability optimization of series-parallel systems is modelled by using Markovian process by which the number of maintenance resources is located into the obje...