OOine (cyclic executive) and online preemptive, priority-based scheduling are not exclusive options but rather complementary techniques that can be combined to improve analytically veriiable schedulability. Selective ooine scheduling of periodic tasks improves online schedula-bility based on rate-monotonic priority assignment. Relative to pure ooine scheduling, a hybrid approach has the advanta...

QueuedSynchronizer, upon which most of the state dependent classes in java.util.concurrent are built(see Section 14.4), exploits the concept of exit protocol. Rather than letting synchronizer classes perform their ownnotification, it instead requires synchronizer methods to return a value indicating whether its action might haveunblocked one or more waiting threads. This explicit AP...

In a mobile computing environment, clients can access data irrespective of their physical location. Data is shared among multiple clients and can be updated by each client independently. This leads to inconsistency of the data. Due to limitations of mobile computing environment traditional techniques cannot be used. Several concurrency control techniques are proposed in literature to prevent da...

We present a novel modular, stochastic model for biological template-based linear chain elongation processes. In this model, elongation complexes (ECs; DNA polymerase, RNA polymerase, or ribosomes associated with nascent chains) that span a finite number of template units step along the template, one after another, with semaphore constructs preventing overtaking. The central elongation module i...

In a mobile computing environment, clients can access shared data irrespective of their physical location and can be updated by each client independently. This leads to inconsistency of the data. Several concurrency control techniques are proposed in literature to prevent data inconsistency. In this paper we first analyze the existing scheme of concurrency control without locking and justify it...

Honbo Zhou, Al Geist Mathematical Sciences Section Oak Ridge National Laboratory Oak Ridge, TN 37831 fzhou, [email protected] Abstract This paper describes di erent approaches to build faster message passing routes into PVM. One of the recent e orts is to use shared memory based channels to replace the socket-based routes between the PVM daemon and its local tasks. Another e ort is the co...

Case Reports Case 1. Myopathica Atrophica.-A yeoman of signals aged 22 years was admitted to the Military Hospital, Gibraltar, on August 31, 1943. He complained of having difficulty in facing the light for 10 days. The eyes ached -but did not water, and had become bloodshot in the last 2 months, but especially in the last week when he attended the American hospital at Londonderry for conjunctiv...

During strong earthquakes, structural damage usually occurs, resulting in a degradation of the overall stiffness affected structures. This produces modification dynamic properties structures, for instance, fundamental period vibration (T1). Hence, variation T1 could be used as an indicator seismic damage. In this article, assessment four generic typologies steel buildings was carried focused on...

Claude Chappe (1763-1805) invented a semaphore visual telegraph. The lines between cities were composed by a series of towers (stations), 10-15 km apart, equipped with a pair of telescopes and a semaphore which beams were permitted discrete angular positions. These positions were assigned to numeric symbols in connection with a code book. Where the transmission of a message took days, it only n...