The DIRC (Detection of Internally Reflected Cerenkov (light)) is a new type of Cerenkov ring imaging detector based on total internal reflection that is used in the BABAR detector at the PEP-II ring ...of the Stanford Linear Accelerator Center, Stanford, CA. The Cerenkov radiators are long rectangular bars made of synthetic fused silica. The photon detector is a water tank equipped with an array of 10,752 conventional photomultipliers. The first-year operational experience in the BABAR detector is presented on the basis of cosmic data and collision data in the energy region of the Upsilon (4S) resonance. (Author)
The DIRC (acronym for Detection of Internally Reflected Cherenkov (light)) is a new type of Cherenkov ring imaging detector based on total internal reflection that is used for the first time in the ...BABAR detector at PEP-II ring of SLAC. The Cherenkov radiators are long rectangular bars made of synthetic fused silica. The photon detector is a water tank equipped with an array of 10,752 conventional photomultipliers. The first year operational experience in the BABAR detector is presented using cosmic data and collision data in the energy region of the /spl Upsi/(4S) resonance.
Heat-Related Mortality — Chicago, July 1995 Donoghue, E R; Kalelkar, M B; Boehmer, MA ...
MMWR. Morbidity and mortality weekly report,
08/1995, Letnik:
44, Številka:
31
Journal Article, Newsletter, Magazine Article
During July 12-16, 1995, Chicago experienced unusually high maximum daily temperatures, ranging from 93 F to 104 F (33.9 C to 40.0 C). On July 13, the heat index peaked at 119 F (48.3 C)--a record ...high for the city. This report describes the heat-related deaths reported by the Cook County Medical Examiner's Office (CCMEO) during this heat wave.
Elevated levels of low density lipoprotein (LDL) and smoking have long been recognized as risk factors for atherosclerosis and coronary heart disease (CHD). However, the mechanisms by which these ...factors contribute to the disease have not been fully elucidated. It has been postulated from in vitro studies using serum and LDL from smokers that smoking increases the oxidation of LDL, which in turn contributes to atherogenesis. We know of no direct evidence linking oxidized LDL (oxLDL) in human arteries to increased atherosclerosis in individuals who show elevated serum thiocyanate levels (HST) as an indicator of recent smoking. We have studied arterial samples from smokers micromorphometrically and found that ‘smokers’ have a greater area in which oxLDL can be identified in the early stages of the disease than do ‘nonsmokers’, i.e., individuals with low serum thiocyanate levels (LST). This study demonstrates a positive correlation between the extent of oxLDL in the fatty streaks as well as the fatty plaques of standardized core sample areas of the thoracic and abdominal aortas of a sample group of young people, aged 15–34, who have evidence of recent smoking based on their postmortem serum thiocyanate levels.
Smoking is considered a major risk factor for the development and progression of atherosclerosis. The effects of apolipoprotein E (apo E) and macrophages in the pathogenesis and progression of human ...atherosclerosis have not been adequately elucidated even though they are frequent components of the diseased arterial intima. Anatomically standardized samples of arteries from young people whose risk factor indices indicated them as “smokers” or “non-smokers” have been studied micromorphometrically. It was found that smokers have a greater area in which apo E is deposited in the early stages of the disease than do non-smokers. Smokers also demonstrated greater “macrophage foam cell populations” than did non-smokers. The study also demonstrates a positive correlation between the number of macrophage foam cells and the extent of apo E deposition in the developing lesions of the thoracic and abdominal aortas of white men aged 30–34 years who have evidence of recent cigarette smoking as determined by their postmortem blood thiocyanate levels.
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