00000nam 2200000zi 4500 9.927891 CaOODSP 20231004085730 m o d f cr |n||||||||| 230928e198903uuabcd ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-ab DR52-6/16-1989E-PDF Yee, Eugene, 1958- author. An upper bound on the threshold crossing probability for short-time exposure dosage with implications for the assessment of hazard from toxic vapors (U) / by E. Yee. On concentration fluctuations and their impact on the assessment of public health risks associated with the cava trials Ralston, Alberta : Defence Research Establishment Suffield, March 1989. 1 online resource (17, 2, [12] pages) : charts text txt rdacontent computer c rdamedia online resource cr rdacarrier Suffield memorandum ; no. 1260 "PCN 051 SP"--title page. Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 17). "An upper bound on the threshold crossing probability of the random dosage field produced by the instantaneous or short-term release of a passive scalar (contaminant) into the turbulent atmospheric boundary layer is obtained. This bound is constructed by developing a model for the nonstationary stochastic process representing the fluctuations in the concentration of the contaminant as observed at some fixed receptor downwind of the source (i.e., the point of release of the scalar). The implications of this bound for the evaluation of the hazard posed by the release of toxic substances into the atmosphere is discussed. Here, it is emphasized that the neglect of fluctuations in the dosage can lead to a significant underestimation of the risk of exposure to the toxic substance. Furthermore, it is speculated that the nature as well as the magnitude of the concentration fluctuations will have considerable impact on the protection levels that are provided by the current individual and collective protection equipment such as mask cannisters of filters and protective suits"--abstract. Chemical agents (Munitions) Mathematical models. Biological weapons Mathematical models. Agents chimiques (Munitions) Modèles mathématiques. Armes biologiques Modèles mathématiques. Defence Research Establishment Suffield, issuing body. Canada. Department of National Defence, issuing body. Suffield memorandum ; no. 1260. (CaOODSP)9.870467 PDF 2.40 MB https://publications.gc.ca/collections/collection_2023/rddc-drdc/DR52-6-16-1989-eng.pdf SM 1260 ; DRES-M-1260