As the Internet has become a big business, its performance has become an important question. Several companies have started monitoring Internet performance, many ISPs now conduct internal performance measurements, and there are also independent organizations such as RIPE that conduct regular performance monitoring of ISPs. The exact form of measurements may vary, but typically they are based on...

In this paper we voice concerns about the uncritical manner in which the mean is often used as a summary statistic in psychological research. We identify a number of implicit assumptions underlying the use of the mean and argue that the fragility of these assumptions should be more carefully considered. We examine some of the ways in which the potential violation of these assumptions can lead u...

INTRODUCTION Root canal anatomy and canal preparation instruments affect the outcome of endodontic treatment. The purpose of this study was to determine the root surface strain (SS) generated and the extent of canal center transportation during canal shaping using 3 different nickel-titanium instruments. METHODS Simulated root canals in resin blocks (n = 10 per group) were prepared using adap...

introduction: toxic mushrooms are distributed across the globe with over 5000 species. among them, 100 species are responsible for most of the cases of mushroom poisoning. this study aimed to evaluate the epidemiologic pattern of mushroom poisoning among patients referred to the main toxicology center of mashhad province located in north-east of iran. method: this cross-sectional study was cond...

It is time for the systems community of researchers and developers to broaden the agenda beyond performance. The 10000X increase in performance over the last 20 years means that other aspects of computing have risen in relative importance. We see three challenges for the future as [Patterson2002a]: 1. Synergy with humanity: We need to make the technology match human nature, both for users of pe...

BACKGROUND Center-specific TTR (c-TTR) is a measure reporting the mean patient TTR within an anticoagulation clinic describing the quality of anticoagulant monitoring offered by that clinic. c-TTR has a considerable between-center variation, but its determinants are poorly understood. OBJECTIVES We aimed at evaluating which clinical, procedural or laboratory factors could be associated with c...