BACKGROUND Although a number of methods are used to estimate polyethylene liner wear from radiographs of total hip replacements, there is no consensus with regard to the accuracy of these methods. The purpose of this study was to compare the accuracy of several such measurement methods with use of both laboratory radiographs and routine clinical radiographs. METHODS A phantom apparatus was de...

When computing resources are consolidated in a few huge data centers, a massive amount of data is transferred to each data center over a wide area network (WAN). This results in increased power consumption in the WAN. A distributed computing network (DCN), such as a content delivery network, can reduce the traffic from/to the data center, thereby decreasing the power consumed in the WAN. In thi...

High quality video content for on-demand services is usually stored and streamed in a compressed format with a VBR (variable bit rate) property; however, the streaming traffic is extremely bursty. If there is no client buffer to regulate the video’s delivery, the backbone WAN (wide area network) bandwidth needs to allocate the video’s peak bit rate to guarantee playback quality. To reduce the b...

We give a proof, following an argument of H.W. Lenstra, of the conjecture of L. Carlitz (1966) as generalized by D. Wan (1993). This says, there are no exceptional polynomials of degree n over Fq if (n, q− 1) > 1. Fried, Guralnick and Saxl proved a much stronger result, showing that primitive exceptional polynomials have monodromy groups with degrees either a power of the characteristic (and th...

Real-time distribution of stored video over wide-area networks is a crucial component of many emerging distributed multimedia applications. The heterogeneity in the underlying network environments is an important factor that must be taken into consideration when designing an end-to-end video delivery system. In this paper, we present a novel network-conscious approach to the problem of end-to-e...

Objective. To illustrate the difference in cold/hot natural properties and therapeutic effect of coptis-evodia herb couples by using cold/hot plate differentiating technology and microcalorimetry combined with material basis analysis in vivo and in vitro. It showed that animal retention ratio in hot pad significantly decreased along with the decrease in coptis proportion in coptis-evodia herb c...