This document describes the interface of the Pthreads library developed at Florida State University. The implementation is based on the \POSIX 1003.1c Threads Extension" standard by the IEEE. The implementation is currently limited to the Sun SPARC architecture and the SunOS 4.1.x or Solaris 2.x operating systems as well as the Inter x86 architecture under Linux, FreeBSD, SCO and DOS+DJGPP. The...

In many situations, it may be more economical to use a used unit than to do a new one. This paper considers an age replacement policy and a periodic replacement policy with minimal repair at failure for a used unit of age x. We discuss optimum replacement policies which minimize the expected cost rates for a specified age x. Further, we obtain an upper bound of an optimum time for an age replac...

Block replacement policy is a type of preventive replacement policies where the units are always replaced at failure or at a scheduled time periodically. Assuming the lifetimes of the units are uncertain variables, this paper studies the block replacement policy in an uncertain environment. To deal with the different constraints a decision maker may face, three different criterions are used to ...

I n the past many decades, breakdown, maintenance and replacement issues of deteriorating machines and systems are extensively studied within the literature. A number of maintenance and replacement models, techniques and policies are created, documented and tested. However, of these models are comprised of some classes ∗M.Tech. Student, Department of Mechanical Engineering, Madhav Institute of ...

In this paper we study the moment generating function order and the new better than used in the moment generating function order (NBUmg) life distributions. A closure property of this order under an independent random sum is deduced, and stochastic comparisons among the block replacement policy, the age replacement policy, the complete repair policy, and the minimal repair policy of an NBUmg co...

A predictive-maintenance structure for a gradually deteriorating single-unit system (continuous time/continuous state) is presented in this paper. The proposed decision model enables optimal inspection and replacement decision in order to balance the cost engaged by failure and unavailability on an infinite horizon. Two maintenance decision variables are considered: the preventive replacement t...

The cache replacement policy is one of the factors that determines the eeectiveness of cache memories. In this paper, we study the impact of incorporating the cache block coherence state information in the Random replacement policy in a shared{memory multipro-cessor. We assign replacement priority to each cache block within a set based on its state. To reduce the probability of replacing a rece...