Data caching in mobile clients is an important technique to enhance data availability and improve data access time. Due to cache size limitations, cache replacement policies are used to find a suitable subset of items for eviction from the cache. In this paper, the authors study the issues of cache replacement for location-dependent data under a geometric location model and propose a new cache ...

This paper presents the effects of a free-repair warranty on the periodic replacement policy in discrete time process. Consider a repairable product that should be operating at the time over an indefinitely long operation cycle n (     , 2 , 1 n ); under the discrete-time periodic replacement policy, a product is preventively replaced at pre-specified operation cycles    , 3 , 2 , N N N ...

With the ever-growing performance gap between memory systems and disks, and rapidly improving CPU performance, virtual memory (VM) management becomes increasingly important for overall system performance. However, one of its critical components, the page replacement policy, is still dominated by CLOCK, a replacement policy developed almost 40 years ago. While pure LRU has an unaffordable cost i...

This paper describes the design and use of a synthetic Web proxy workload generator called ProWGen to investigate the sensitivity of Web proxy cache replacement policies to five selected Web workload characteristics. Three representative cache replacement policies are considered in the simulation study: a recency-based policy called Least-Recently-Used (LRU), a frequency-based policy called Lea...

Replacement policies for general caching applications and Web caching in particular have been discussed extensively in the literature. Many ad-hoc policies have been proposed that attempt to take adavantage of the retrieval latency of documents, their size, the popularity of references and temporal locality of requested documents. However, the problem of finding optimal replacement policies und...

Over the past decades, science funding shows a shift from recurrent block funding towards project funding mechanisms. However, our knowledge of how project funding arrangements influence the organizational and epistemic properties of research is limited. To study this relation, a bridge between science policy studies and science studies is necessary. Recent studies have analyzed the relation be...

Effective cache replacement is becoming an increasingly important issue in cache hierarchy design as large set-associative caches are widely used in high-performance systems. This paper proposes a novel approach to approximate the decisions made by an optimal replacement algorithm (OPT) using last-touch prediction. The central idea is to identify, via prediction, the final reference to a cache ...

Objective prospective evaluation of the technique of isolated tricuspid valve replacement on beating heart, compared to the classic aortic cross clamp and cardiolplegia administration. Methods Between May 2004 and May 2014, 30 patients underwent surgery for isolated tricuspid valve infective endocarditis (TVIE), in Cairo University hospitals. Patients were divided into two equal groups. 15 pati...

As World Wide Web usage has grown dramatically in recent years, so has grown the recognition that Web caches (especially proxy caches) will have an important role in reducing server loads, client request latencies, and network traffic. In this paper, we propose an adaptive cache coherence-replacement scheme for web proxy cache systems that is based on several criteria about the system and appli...

As World Wide Web usage has grown dramatically in recent years, so has grown the recognition that Web caches (especially proxy caches) will have an important role in reducing server loads, client request latencies, and network traffic. In this paper, we propose an adaptive cache coherence-replacement scheme for web proxy cache systems that is based on several criteria about the system and appli...