منابع مشابه
Evaluation of three smoke detector promotion programs.
CONTEXT Seventy percent of U.S. residential fire deaths occur in homes without a working smoke detector. To help prevent residential fire deaths, many programs have distributed or installed detectors in unprotected homes. Because persons receiving a detector may not install it and because detector batteries require annual replacement, the enduring effectiveness of these programs may be question...
متن کاملA Smoke Detector Algorithm for Large Eddy Simulation Modeling
This study chronicles the development and integration of a smoke detector activation algorithm that describes the response time of a smoke detector into a Large Eddy Simulation (LES) fire model. Although the activation algorithm could be used with any CFD smoke movement model, the results here address specifically its application to the Fire Dynamics Simulator (FDS). The fire model predicts the...
متن کاملAn anthrax "smoke" detector. Online monitoring of aerosolized bacterial spores.
Endospores can be formed by certain bacteria during times of stress or lack of nutrients. This dormant bacterial form can survive harsh conditions such as boiling, freezing, and desiccation that readily kill vegetative bacteria. Indeed, Bacillus stearothermophilus and Bacillus subtilis spores are used to check the performance of autoclaves. Two spore-forming genera of medical importance, Bacill...
متن کاملAn Experimental Study on the Photoelectric Optical Smoke Detector Response
This study investigates the fire safety problem of a smoke detection system in terms of the probable response of light scattering photoelectric smoke detectors. In particular, response characteristics of the smoke detectors were studied experimentally in a test chamber described in UL268, with cotton wick generated fire smoke flowing at a velocity between of 0.5 ms and 3 ms. Measurements of a ‘...
متن کاملSmoke detector legislation: its effect on owner-occupied homes.
Montgomery County, Maryland was the first major jurisdiction to pass a law requiring smoke detectors in all homes. Smoke detector coverage in the county was evaluated five years after the law's implementation and compared to the coverage in neighboring Fairfax County, Virginia, which has no such law. Firefighters visited 651 randomly selected owner-occupied homes and tested each detector. While...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1898
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08271898-18950asupp