This dissertation presents several techniques to accelerate Java locks based on the analyses of their behavior from various viewpoints. Ten years have passed since Java was announced, and now the language has come to be used in various fields including large-scale Web services. To make such applications practical, performance improvements for the Java execution environments are indispensable. I...

BACKGROUND Double lumen dialysis catheters are routinely heparin or citrate 'locked' to maintain patency. Heparin lock-related bleeding episodes and antibiotic lock-related toxicity have been reported. The aim of this study is to quantify the amount of leak during 'lock' procedures and to compare leakage for different double lumen dialysis catheters. METHODS In an experimental, in vitro study...

0272-1732/03/$17.00  2003 IEEE Published by the IEEE computer Society Explicit hardware support for multithreaded software, either in the form of shared-memory chip multiprocessors or hardware multithreaded architectures, is becoming increasingly common. As such support becomes available, application developers are expected to exploit these developments by employing multithreaded programming. ...

The concurrency control lock (e.g. file lock, table lock) has long been used as a canonical example of a covert channel in a database system. Locking is a fundamental concurrency control technique used in many kinds of computer systems besides database systems.Locking is generally considered to be interfering and hence unsuitable for multilevel systems. In this paper we show how such locks can ...

Mellor-Crummey and Scott present a spin-lock that avoids network contention by having processors spin on local memory locations. Their algorithm is equivalent to a lock-free queue with a special access pattern. The authors provide a complex and unintuitive proof of the correctness of their algorithm. In this paper, we provide a simple proof that the MCS lock is a correct critical section soluti...

This study was conducted to investigate the hair production and fleece characteristics of hairy goats according to the sex and age of animals. The material of the study consisted one total data of 73 hair goats, which were between more than one year-old and one year-old Lori goats from both sexes (26 males and 47 females). The overall fleece weight, fiber length, lock length, washing yield, hai...

The energy transition from inefficient fossil-based to sustainable systems can face various lock-ins. There are no pathways that free of stress. However, many routes possible. A good understanding the dynamic behavior is crucial, and proper support tools needed assess outcomes every selected pathway. This study aims develop an Internet-based interface tool for national simulation model as a “hy...

Fully understanding the mechanisms of signaling proteins such as G protein-coupled receptors (GPCRs) will require the characterization of their conformational states and the pathways connecting those states. The recent crystal structures of the beta(2)- and beta(1)-adrenergic receptors in a nominally inactive state constituted a major advance toward this goal, but also raised new questions. Alt...