In distributed computing environments, replication of data provides improved availability, isolation between workloads with di erent characteristics, and improved performance through local access to data. The \real data" is server resident and by \local data" we refer to cached client data. We examine which data should be cached on behalf of a cached query. The minimum requirement for cached da...

Expert systems in complex domains require rich knowledge representation formalisms and problem solving paradigms. A typical framework may involve a blackboard architecture and a Reason Maintenance System (RMS) to guarantee the consistency of the links between the blackboard nodes. However, in order to satisfy computational feasibility and become operational, the resulting expert system must oft...

A CO 2 -capturing hybrid-type power generation system with highly e cient use of solar thermal energy was proposed and its characteristics were investigated. In the system, relatively low temperature saturated steam is produced using solar thermal energy and is used as the working uid of a methanering gas-turbine system. The solar thermal utilization e ciency becomes considerably high compared ...

This paper develops an index of allocative effi ciency that depends upon the distribution of mark-ups across goods and is separable from an index of standard Ricardian gains from trade. It determines how changes in trade frictions affect allocative efficiency in an oligopoly model of international trade, decomposing the effect into the cost-change channel and the price-change channel. Formulas ...

The aim was to examine driver-assistance systems that seem to have a considerable potential for road safety and tra c e ciency improvement, and to propose an impact-oriented classi®cation of these systems. A broad overview of a series of driver-assistance systems under development or in some cases already available is presented and it identi®es the basic characteristics of each system and its...

In Whiplash PCR WPCR autonomous molecular compu tation is achieved by the recursive self directed polymerase extension of a mixture of DNA hairpins A barrier confronting e cient implementa tion however is a systematic tendency for encoded molecules towards backhybridization a simple form of self inhibition In order to examine this e ect the length distribution of extended strands over the cours...

Objective: To assess the iodine nutritional status and the prevalence of goitre during pregnancy in a region of Hungary that appeared to be iodine suf®cient in previous studies. Design: A cross-sectional voluntary screening study was organized in which 313 pregnant women participated. Methods: Urine iodine concentration and the volume of the thyroid gland were measured in every woman. In the pr...

Purpose: to assess the effectiveness of carbon dioxide laser light in treatment benign skin neoplasms. Material and methods. The researchers have analyzed outcomes 1394 patients treated for In main group (n = 1184), photocoagulation (vaporization) photohydraulic preparation were applied. Laser surgical devices “Lancet-1” “Lancet-2” continuous pulsed modes, power up 20 W, focused beam 1 mm used....

the hyperimmunoglobulin e syndromes (hiess) are very rare immunodeficiency syndromes with multisystem involvement, including immune system, skeleton, connective tissue, and dentition. hies are characterized by the classic triad of high serum levels of immunoglobulin e (ige), recurrent staphylococcal cold skin abscess, and recurrent pneumonia with pneumatocele formation. most cases of hies are s...