BACKGROUND In a retrospective case-note and computer database analysis we assessed the outcome of very elderly patients (> or = 75 years old) with end-stage renal disease (ESRD) on renal replacement therapy (RRT). METHODS Fifty-eight individuals aged 75 or over (group 1) commenced RRT between 1 January 1991 and 31 December 1995. Comparisons were made with other patients commencing RRT who wer...

Web proxy caching is used to improve the performance of the Web infrastructure. It aims to reduce network traffic, server load, and user perceived retrieval delays. The heart of a caching system is its page replacement policy, which needs to make good replacement decisions when its cache is full and a new document needs to be stored. The latest and most popular replacement policies like GDSF us...

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...

In this study, a new warranty service strategy is proposed and analyzed. This strategy adds the renewing free-replacement warranty to a non-repairable product sold under the rebate warranty policy. According to the renewing free-replacement warranty, the seller (manufacturer) is responsible for replacing all failed product during the warranty period, and the warranty begins anew with each repla...

• The limitations of traditional “replacement rate” calculations: For decades, “replacement rates” have been the primary “rule-of-thumb” measure used in the retirement planning process. However, replacement rate calculations are overly simplistic and potentially inaccurate because they often are based on methodologies limited to replacement of preretirement cash flow after adjustment for taxes,...

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 ...

BACKGROUND Continuous femoral nerve block and fascia iliaca compartment block are 2 traditional anesthesia methods in orthopedic surgeries, but it is controversial which method is better. The objective of this study was to compare the practicality, efficacy, and complications of the 2 modalities in hip replacement surgery in the elderly and to assess the utility of a novel cannula-over-needle s...

We propose an adaptive cache coherence-replacement scheme for distributed systems that is based on several criteria about the system and applications, with the objective of optimizing the distributed cache system performance. We examine different distributed platforms (shared memory systems, distributed memory systems, and web proxy cache systems) and the potential of incorporating coherency-re...