An optimal algorithm for global termination detection in shared-memory asynchronous multiprocessor systems

In the literature, the problem of global termination detection in parallel systems is usually solved by message passing. In shared-memory systems, this problem can also be solved by using exclusively accessible variables with locking mechanisms. In this paper, we present an algorithm that solves the problem of global termination detection in shared-memory asynchronous multiprocessor systems without using locking. We assume a reasonable computation model in which concurrent reading does not require locking and concurrent writing different values without locking results in an arbitrary one of the values being actually written. For a system of n processors, the algorithm allocates a working space of 2n + 1 bits. The worst case time complexity of the algorithm is n + 2√n + 1, which we prove is the lower bound under a reasonable model of computation. © 1997 IEEE.published_or_final_versio

The Enforcement of Mainland Awards before and after the Arbitration (Amendment) Ordinance 2000

In a recent case, the Court of First Instance held that for awards made on the Mainland before 1997, enforcement should have been refused for lack of jurisdiction if the application for leave to enforce the award was made after the change of sovereignty but before the Arbitration (Amendment) Ordinance 2000 came into effect. Leung Hing-fung discusses.published_or_final_versio

Laser spectroscopy of iridium monoboride

High resolution laser induced fluorescence spectrum of IrB in the spectral region between 545 and 610 nm has been recorded and analyzed. Reacting laser-ablated iridium atoms with 1% B2 H6 seeded in argon produced the IrB molecule. This is the first experimental observation of the IrB molecule. Four vibronic transition bands, (v,0) with v=0-3 of an electronic transition system, have been observed. Spectra of all four isotopic molecules, Ir191 B10, Ir193 B10, Ir191 B11, and Ir193 B11, were recorded. Isotopic relationships confirmed the carrier of the spectra and the vibrational quantum number assignment. Preliminary analysis of rotational lines showed that these vibronic bands are with ′ =2 and ″ =3. The electronic transition identified is assigned as the [16.5] Π23 -X Δ33 system. Partially resolved hyperfine structure which conforms to the Hund's case aΒ coupling scheme has been observed and analyzed. The bond length r0 of the lower X Δ33 state of IrB was determined to be 1.7675 Å. © 2008 American Institute of Physics.published_or_final_versio

Photodegradation of the iodinated X-ray contract medium iopromide using combined oxidants of S₂O₈²⁻ and H₂O₂ promoted by UV irradiation promoted by UV irradiation

Author name used in this publication: W. ChuVersion of RecordPublishe

Longitudinal diffusion tensor MR imaging study of radiation induced white matter damage in a rat model

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Implantable atrial defibrillator prevented atrial stunning and improved ventricular funciton after cardioversion from atrial fibrillation

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High incidence of atrial fibrillation after dual chamber pacemaker implantation - implication on the use of atrial defibrillation mode pacemakers

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Magnetic properties of Mn doped ZnO tetrapod structures

Author name used in this publication: C. Surya2003-2004 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Increased serum levels and epithelial expression of macrophage migration inhibitory factor in gastric cancer

This journal suppl. contain abstracts of the 8th Medical Research Conference, Medical Science Group, Queen Mary Hospital, Hong Kongpublished_or_final_versio

Continuation of dabigatran therapy in "real-world" practice in Hong Kong

Background: Dabigatran, an oral direct thrombin inhibitor, possesses several advantages over warfarin that can in principle simplify the management of stroke prevention in atrial fibrillation (AF). Nonetheless it remains unclear whether these advantages can translate to clinical practice and encourage long-term therapy. The objective was to describe long-term dabigatran therapy for stroke prevention in AF and to identify risk factors for discontinuation of therapy. Methods and Results: We studied 467 consecutive Chinese patients (72±11 years, male: 53.8%) with a mean CHA2DS2-VASc score of 3.6 prescribed dabigatran for stroke prevention in AF from March 2010 to September 2013. Over a mean follow-up of 16 months, 101 patients (21.6%) permanently discontinued dabigatran. The mean time-to-discontinuation was 8 months. The most common reason for discontinuation was dyspepsia (30.7%), followed by other adverse events (17.8%) such as minor bleeding (8.9%), major gastrointestinal bleeding (7.9%), and intracranial hemorrhage (1%). Other reasons included dosing frequency (5.9%), fear of side effects (4.0%), lack of laboratory monitoring (1.0%), and cost (1.0%). Multivariable analysis revealed that low baseline estimated glomerular filtration rate (p = 0.02), absence of hypertension (p= 0.01), and prior use of a proton-pump inhibitor (p = 0.02) and H2-receptor blocker (p = 0.01) were independent predictors of drug discontinuation. In addition, there were altogether 9 ischemic strokes (1.5%/years), 3 intracranial hemorrhages (0.5%/year), and 24 major gastrointestinal bleedings (4.1%/year). Conclusion: Dabigatran discontinuation is very common amongst Chinese AF patients. This reveals a management gap in the prevention of stroke in AF. © 2014 Ho et al.published_or_final_versio