Data from the Total Exposure Assessment Methodology studies, conducted from 1980 to 1987 in New Jersey (NJ ) and California (CA) , and the 1990 California Indoor Exposure study were analyzed using positive matrix factorization, a receptor -oriented source apportionment model. Personal exposure and outdoor concentrations of 14 and 17 toxic volatile organic compounds (VOCs) were studied from the ...

investigations are carried out to evaluate the performance of a low heat rejection (lhr) diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions of crude jatropha oil with varied injection timing and injection pressure.  performance parameters of brake ther...

BACKGROUND An association between diesel exhaust exposure and lung cancer mortality in a large retrospective cohort study of US railroad workers has previously been reported. However, specific information regarding cigarette smoking was unavailable. METHODS Birth cohort, age, job, and cause of death specific smoking histories from a companion case-control study were used to impute smoking beh...

This study designs a smart home control system, aiming to resloving family fires and the problem of children falling over windows. The system includes data monitoring module, single-chip display an executive module alarm module. collects temperature, smoke pressure inside home, microcomputer processes collected by displays it on in real time. When temperature value exceeds set threshold, alarms...

Tunnel widely exists in highway, subway and other underground buildings. Due to the structural limitations, direction of evacuation is consistent with main flow smoke tunnel. For design exhaust system, traditional methods aim at reducing overall concentration whole However, when fire hazard occurs, rapid personnel escape requires higher visibility. In this paper, a novel air supply device desig...

Particulates and complex organic mixtures were sampled from the exhaust of a flame retention head residential oil burner combusting No. 2 fuel oil at three firing conditions: continuous at Bacharach Smoke No. 1, and cyclic (5 min on, 10 min off) at Smoke Nos. 1 and 5. The complex mixtures were recovered by successive Soxhlet extraction of filtered particulates and XAD-2 sorbent resin with methy...

1 “Hot air rises!” This introductory sentence to Design Guide 1 states the obvious. But why does it sometimes rise and stay within the hood envelope and other times fill the kitchen with smoke, grease, and heat? Recent research sponsored by the American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE) provided intriguing insights into this question. In addition to the ...

Fine particles (PM2.5, i.e., particles with an aerodynamic diameter of ≤2.5μm) were collected from the air in August 2005, August–September 2006, and January– February 2007, in Beijing, China. The chemical compositions of particulate organic matter in the ambient samples were quantified by gas chromatography/mass spectrometry. The dominant compounds identified in summertime were n-alkanoic acid...