University of Texas at Arlington

About: University of Texas at Arlington is a education organization based out in Arlington, Texas, United States. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 11758 authors who have published 28598 publications receiving 801626 citations. The organization is also known as: UT Arlington & University of Texas-Arlington.

Hierarchical Web caching systems: modeling, design and experimental results

Abstract: This paper aims at finding fundamental design principles for hierarchical Web caching. An analytical modeling technique is developed to characterize an uncooperative two-level hierarchical caching system where the least recently used (LRU) algorithm is locally run at each cache. With this modeling technique, we are able to identify a characteristic time for each cache, which plays a fundamental role in understanding the caching processes. In particular, a cache can be viewed roughly as a low-pass filter with its cutoff frequency equal to the inverse of the characteristic time. Documents with access frequencies lower than this cutoff frequency have good chances to pass through the cache without cache hits. This viewpoint enables us to take any branch of the cache tree as a tandem of low-pass filters at different cutoff frequencies, which further results in the finding of two fundamental design principles. Finally, to demonstrate how to use the principles to guide the caching algorithm design, we propose a cooperative hierarchical Web caching architecture based on these principles. Both model-based and real trace simulation studies show that the proposed cooperative architecture results in more than 50% memory saving and substantial central processing unit (CPU) power saving for the management and update of cache entries compared with the traditional uncooperative hierarchical caching architecture.

Causes, Coping and Consequences of Stress at Work

Abstract: The article reviews the book “Causes, Coping and Consequences of Stress at Work,” edited by Cary L. Cooper and Roy Payne.

They spoke in defense of themselves: On the generic criticism of apologia

Abstract: The family of apologetic speeches, composed of responses to charges made against a person's character, has yet to receive critical attention as a genre. This essay, based upon the study of apologia from different historical periods, identifies four types of rhetorical strategies commonly found in such addresses. Rhetors typically employ these strategies in combinations that produce four discernible subgenres of the apologetic form: (a) absolutive, (b) vindicative, (c) explanative, and (d) justificative. This mapping of the genre should serve as an aid in the generic criticism of apologia.