Quarter-value layer is the amount of specified material that reduces the air kerma rate ( or exposure rate, exposure, air kerma, etc . . . ) to one fourth of the value obtained without any test filters.
22.
Projections from this study suggest that about 4400 tortoises could escape from captivity in a given year, and with an 82 % exposure rate to URTD, the wild population may be at greater risk than previously thought.
23.
But measurements of the intake and ingestion were not combined with information about the external doses to calculate a total exposure rate, according to the nonprofit group, the Institute for Energy and Environmental Research, based in Takoma Park, Md.
24.
Alpha particles ( uranium oxide dust ) from expended rounds is a health concern but Beta particles from fragments and intact rounds is a serious health threat, with a possible exposure rate of 200 millirems per hour on contact.
25.
At this stage, humans could remain unsheltered full-time since their yearly radiation dose would be about 80 mSv . However, this yearly dose rate is on the order of 30 times greater than the peacetime exposure rate of 2.5 mSv / year.
26.
Where " F " is the exposure rate, " r " is the distance, " ? " is the source activity, and " ? " is the exposure rate constant, which is dependent on the particular radionuclide used as the gamma ray source.
27.
Where " F " is the exposure rate, " r " is the distance, " ? " is the source activity, and " ? " is the exposure rate constant, which is dependent on the particular radionuclide used as the gamma ray source.
28.
In measurement of cumulative exposures rates of populations within a 300-mile radius of the test site, of the period 1951 to 1959, the Upshot Knothole tests was found to have produced 50 % ( rounded figure ) was due to the test-shot " Harry ".
29.
The April 24 tobacco edition of JAMA covers a range of issues, including the employment impact of falling tobacco sales, the right of state and local governments to ban billboard advertising, secondhand smoke exposure rates and advice for doctors on how to help patients quit.
30.
Women s groups have been critical of the government s handling of the Fukushima aftermath they object to the raising of the allowed radiation exposure rate from 1 to 20 mSv, poor identification of radiation " hotspots ", calculation only of external radiation while omitting internal radiation, and patchy food supply arrangements.
