in recent years, rye caused heavy damages in wheat farms in iran. in order to evaluate wheat competitiveness ability against rye, an experiment was conducted in replacement series design. field experiment was carried out at the agricultural and natural resources research station in miandoab during 2009-2010 (for 2 years). the experimental design was a randomized complete block design with 3 rep...

Abstract In this paper, a repairable system of a monotone process model for a one-component multistate degenerative system with (k + 1) states(k-failure states and one working state) is studied. Also an alternative model, called the Negligible Or Non-Negligible (NONN) repair times introduced by Thangaraj and Rizwan (2001) is incorporated in this model to develop some new repair models. A replac...

Replacement policy defines the enhancement factor in deciding the system performance. Many different policies have different effects on the system performance, but still there exist performance gap between processors and memory system. In the IPTV services it provides the various services to the user as per their request, the proposed policy is based on the no of hit count and miss count on the...

With the evolution of technology, the maintenance of sophisticated systems is of concern for system engineers and system designers. The maintenance cost of the system depends in general on the replacement and repair policies. The system replacement may be in a strictly periodic fashion or on a random basis depending upon the maintenance policy. At failure, the repair of the system may be perfor...

This paper introduces the notion of PoP (Policy of Policies) used to define standard policy replacement strategies in a policy-based network. We also propose an architecture to support PoP within PDPs (Policy Decision Points originally defined by the IETF). The notion of PoP, and the proposed architecture allow the automation of the policy replacement task currently manually executed by the net...

We propose an adaptive cache coherence-replacement scheme for web proxy cache systems that is based on several criteria about the system and applications, with the objective of optimizing the distributed cache system performance. Our coherence-replacement scheme assigns a replacement priority value to each cache block according to a set of criteria to decide which block to remove. The goal is t...

Cache memories help bridge the cycle-time gap between fast microprocessors and relatively slow main memories. By holding recently referenced regions of memory, caches can reduce the number of cycles the processor must stall while waiting for data. As the disparity between processor and main memory cycle times increases by 40 percent or more per year cache performance becomes ever more critical....

Multimedia proxy plays an important role in media streaming applications. In this paper, we propose an architecture for multimedia proxy across wireless Internet. By considering multiple objectives of multimedia proxy, we design a unified cost metric to measure proxy performance in wireless Internet. Furthermore, we propose a cost-based replacement policy for wireless Internet to improve the pe...