Locks are efficient concurrent control mechanisms to ensure that shared resources are accessed by only a single thread in multi-threaded applications. However, for multi-core systems, lock usage leads to lock contention, which degrades program performance, increases system response time, and negatively affects scalability. This paper initially models lock contention from two aspects: static str...

Even in 2021, people still have questions and concerns about the new Covid-19. It is very important for public to learn disease understand how protect themselves from it, which a part of health's responsibility. Quarantine, social distance, more facts will be beneficial developing people's self-awareness when involved pandemic. Since Covid-19 an airborne disease, keep their distance each other ...

We describe a high sensitivity and high spectral resolution laser absorption spectrometer based upon the frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) technique. We used the Pound-Drever-Hall (PDH) method to lock the probe laser to the high-finesse ring-down cavity. We show that the concomitant narrowing of the probe laser line width leads to dramatically increased ring-down even...

M durable products cannot be used without a contingent consumable product, e.g., printers require ink, iPods require songs, razors require blades, etc. For such products, manufacturers may be able to lock in consumers by making their products incompatible with consumables that are produced by other firms. We examine the effectiveness of such a strategy in the presence of strategic consumers who...

CHRISTENSEN, JAMES, AND RICHARD L. HAUSER. Circumferential coupling of electric slow waves in circular muscle of cat’ colon. Am. J. Physiol. 221(4): 1033-1037. 1971 .-The cat colon, opened along the antimesenteric border, was spread, serosa down, in a bath of Krebs solution. Six volume-recording electrodes, 5.8 mm apart, were placed on the circular muscle layer exposed by removal of the mucosa ...

Meta-scheduling, a process which allows a user to schedule a job across multiple sites, has a potential for livelock. Current systems avoid livelock by locking down resources at multiple sites and allowing a metascheduler to control the resources during the lock down period or by limiting job size to that which will fit on one site. The former approach leads to poor utilization; the later poses...

Background: The lockdown in COVID 19 pandemic mandated the normal academic schedule virtual mode includinge-assessments. Since summative assessments are a mix of both selected response approach and constructed responseapproach, new method e assessment under video surveillance by break out room has been tried thisstudy student’s with regard to different aspects this technology will be evaluated....

by drawing blood through a heparin lock, patients can be protected from skin damages duo to repeated needle sticks. in addition, this procedure can assist to gain more precise results in laboratory test and to prevent further complications. probably, you have ever used a heparin lock in order to infusion of medicines but, it is possible that you never use of that for blood sampling. both two pr...