In the literature the problem of global termination detection in shared-memory asynchronous multiprocessor systems is solved by using exclusively accessible variables and locking mechanism. In this paper we present an algorithm that solves this problem without using locking. We assume that concurrent reading does not require locking and concurrent writing diierent values without locking results...

Background: The treatment of distal clavicle fracture is always a challenge, as it is mostly unstable and has higherrate of delayed union, malunion, non-union and associated acromioclavicular arthritis. So the management of thesefractures remains controversial. The purpose of this study is to evaluate the functional results of Type 2 distal endclavicle fractures treated with superior anterior l...

Unilateral stimulation of human peripheral nerves activates the primary somatosensory cortex (SI) contralaterally and the secondary somatosensory cortex (SII) bilaterally. We aimed at characterizing phase locking between SI and SII in response to electric stimuli applied once every 3 s to the right median nerve at the wrist; phase locking between brain regions has been proposed to either reflec...

Long running transactions, such as online purchases, severely reduce throughput under standard locking protocols such as two-phase locking. We investigated the use of escrow transactions to remove the need to wait for locks, and thus reduced the average transaction runtime. Escrow transactions allow transactions to borrow a quantity from the record until the transaction aborts or commits and to...

BACKGROUND Formation of an intraluminal microbial biofilm is noted to play a significant role in the development of catheter-related infections (CRIs). Recently, it has been demonstrated that trisodium citrate (TSC) has superior antimicrobial effects over heparin for catheter locking. In this randomized controlled trial, we compared the influence of catheter locking with heparin and TSC on the ...

An alternative method for locking a second-harmonic generation (SHG) cavity on resonance is described and implemented. The usual method, Pound-Drever-Hall locking, is prone to long-term power fluctuations from power variations in the incident laser. When using the second harmonic field for squeezing, these power fluctuations need to be stabilized with an additional control loop (usually a Mach-...

Sudden and intermittent locking of the elbow joint is a com- mon complaint among patients who commonly demonstrate degenerative changes in the elbow. Common causes of elbow locking include acute trauma, osteochondritis dessicans, synovial chondromatosis, and osteoarthritis. Two cases involving patients with symptoms of elbow locking secondary to reasons other than loose bodies within the joint ...

In this paper we give a homotopy theoretic proof of a well-known result in database engineering: that 2-phase locking is safe. The proof gives an immediate intuitive reason for why the 2-phase locking condition implies safety. We point out a number of interesting open questions regarding the interplay between homotopy and concurrency.