Automatic garbage collection relieves programmers from the burden of managing memory themselves and several techniques have been developed that make garbage collection feasible in many situations , including real time applications or within traditional programming languages. However optimal performance cannot always be achieved by a uniform general purpose solution. Sometimes an algorithm exhib...

The potential for energy, carbon dioxide equivalent (CO 2 e) and cost savings when using low emissivity (low-ε) transpired solar collectors (TSCs), combined with heat pumps in a range of configurations, has been investigated computer modelling. Low-ε TSCs consist metal collector plates spectrally sensitive surface, perforated holes. Ambient air is drawn through the holes heated by convection fr...

Among next-generation battery systems, the lithium-sulfur (Li?S) technology is attracting increasing attention driven by low active material costs, high theoretical specific energy, and promising progress made in terms of its readiness level (TRL) recent years. However, power density, especially prototype cells, an often neglected parameter being crucial for future application sectors. In this ...

An evacuated tubular solar collector was fabricated from acrylics for improved resistance to shattering. A plasmatron was employed to apply a thin gas-barrier coating to the surfaces of the plastic tube to prevent/alleviate gas infiltration. Experiments were conducted to investigate the effect of vacuum level on the performance of the non-glass vacuum-tube solar collector. Inserted in the evacu...

OBJECTIVE To examine whether density of providers or health care facility factors have a significant effect on the rates of perforated appendicitis in the pediatric population. DESIGN A retrospective database analysis. Data were linked to the Area Resource File to determine if there was an association between perforated appendicitis and density of provider and facility factors. SETTING The ...

Wet-collector systems, designed and operated for air-pollution control without concern for or con­ sideration of the stream-pollution effects of their liquid-borne wastes, may cause significant localized pollution of surface and ground water bodies. Wet­ collector systems can be designed with presently known technology to decrease contaminants in effluent outfalls to acceptable levels. Increasi...

Many garbage collectors on parallel computers are written in sequential languages, therefore thay are not portable across machines with different communication primitives. Moreover, the description of garbage collectors on distributed memory machines, which use asynchronous messages, is complex. We implemented a garbage collector for parallel object-oriented language Schematic by using Schemati...

Our research is concerned with compiler-independent, tag-free garbage collection for the C ++ programming language. This paper presents a mark-and-sweep collector , and explains how it ameliorates shortcomings of a previous copy collector. The new collector, like the old, uses C ++ 's facilities for creating abstract data types to deene a tracked reference type, called roots, at the level of th...

Along with the prevalence of email, a number of free email managers have been developed to assist people to deal with personal and interpersonal affairs. Beside sending and receiving email, they provide a diversity of function such as memorandum and calendar. Many researchers are interested in how people communicate via email. They may have questions such as " how long does it take them to repl...