The design and operation of a proof-of-principle rectangular He-Ne ring laser resonator with a cavity perimeter of 77.0 m and an area of approximately 367 m2 are described. With unevacuated beam lines this device gave an Earth-induced Sagnac frequency of 1513 Hz, with a relative Allan deviation over 1000 s down to 3 parts per million. The Earth's rotation provided a bias that eliminated the loc...

An atomic block is a language construct that simplifies the programming of critical sections. In the past, software transactional memory (STM) and lock inference have been used to implement atomic blocks. Both approaches have strengths and weaknesses. STM provides fine-grained locking but has high overheads due to logging and potential rollbacks. Lock inference is a static analysis that compute...

Micromotion has long been associated with wear of polyethylene tibial inserts, potentially causing failure of unicompartmental knee replacement systems. One cause of micromotion is the locking mechanism between the undersurface of the polyethylene and the tibial tray. The objective of this study was to investigate the use of new novel lock designs for reducing the micromotion associated with a ...

Early in 2020 the world community was shocked by Covid-19 which has caused death rates to increase various countries. The government carried out policies as an effort prevent transmission of Covid-19, one is implementing Large-Scale Social Restrictions (PSBB), a localized lock down modification according level severity Province, Regency or City. This research conducted determine for handling an...

In this paper we break a knapsack based two-lock cryptosystem proposed at ICICS’03 [7]. The two-lock cryptosystem is a commutative encryption algorithm that is very useful for the construction of the general t-out-of-n oblivious transfers and millionaire protocol. However, our analysis shows that the proposed knapsack based two-lock cryptosystem is extremely insecure. The serious flaw is that t...

Hardware lock elision (HLE) concurrently executes lock critical sections as hardware transactions, but fallbacks to the original sequential lock fallback path when some hardware transaction fails. Recent software-assisted lock-removal based schemes provide a better concurrency by sacrificing safety (opacity). Hardware transactions can execute at the same time with the lock fallback path as long...

In this short paper we show that hardware-based transactional lock elision can provide benefit by reducing the incidence of lock holder preemption, decreasing lock hold times and promoting improved scalability.

openshapedoor within door { booleanopen int size point hinge , lock line door open = true size = 200 hinge = \NW + {10, 0} lock = if open then hinge-{0, size} else hinge+{size, 0} door = [hinge,lock] } width = 800 length = 800 centre = {500, 500} .

Background People with inflammatory arthritis (IA) treated conventional or biological immunosuppressive disease-modifying anti rheumatic drugs (DMARDs), were initially considered to have an increased risk of severe illness from SARS-CoV-19 (COVID-19) infection compared the general population. Although resent studies not confirmed this, people IA reported high level anxiety and self-isolation du...