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Bioconcentration. In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. [1] [2] There are several ways in which to measure and assess bioaccumulation and bioconcentration. These include: octanol-water partition coefficients (K OW ), bioconcentration factors (BCF ...
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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
The Official Table of Drops, formerly issued by the British Home Office, is a manual which is used to calculate the appropriate length of rope for long drop hangings . Following a series of failed hangings, including those of John Babbacombe Lee, a committee chaired by Henry Bruce, 1st Baron Aberdare was formed in 1886 to discover and report on ...
The decathlon scoring tables should differ from those used for individual event scoring. The scores for different events should be comparable, in a manner such that equal skill levels in different events (however difficult it is to define such a concept) are rewarded with equal point levels. The new tables should be one of the following ...
Time of useful consciousness ( TUC ), also effective performance time ( EPT ), is defined as the amount of time an individual is able to function effectively (e.g. perform flying duties) in an environment of inadequate oxygen supply. [1] It is the period of time from the interruption of the oxygen supply or exposure to an oxygen-poor ...
Many workers estimate they'll need $1 million or more to retire comfortably, though the typical American doesn't have anywhere close to that. The average household retirement account balance in ...
A whole series of 30 games drawing against a player results in a swap of personal grades. ECF grades appear to be zero-sum when looking at a game in isolation; however, negative scores are deemed zero. This means a player's grade after every six months is only then calculated. The more games played, the more the end-of-cycle re-grading is ...