mean life

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mean life

n
(General Physics) physics the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15. Symbol: τ
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References in periodicals archive ?
Mean five-year risk of participants and mean lifetime risk of participants according to the Gail Model (n=750) Risk Mean five-year risk Mean lifetime risk of participants of participants Mean 0.80 11.03 Standard deviation 0.52 4.46 Minumum risk 0.20 5.60 Maximum risk 4.80 38.90 Table 3.
These two mass values may have the same value of [f.sub.r1] but with very different mean lifetimes given for example in the muon case, from the known Standard Model formula:
The mean lifetime of the products turns out to be the FNM of a prior distribution defined on the real line.
The study found that mean lifetime number of partners of men in the immediate local community was predictive of risk of HIV acquisition in women, whereas a high prevalence of partnership concurrency in the same local community was not associated with any increase in risk of HIV acquisition.
Using these surveys alone, a survival function was calculated with a median age at returement of 14.6 years and a mean lifetime of 16.8 years.
The American Heart Association estimates that approximately 800,000 patients in the United States suffer a stroke each year, approximately 87 percent of strokes are ischemic, and the mean lifetime cost of ischemic stroke in the United Slates is approximately $ 140,000.
During the course of the study, the mean lifetime number of births among study participants increased from 3.5 to 4.2, and the mean number of live children rose from 2.8 to 3.5.
The mean lifetime risk for Hispanic women in the focus groups was 6.5% (SD = 4.1) compared to the mean lifetime risk of 6.23% (SD = 1.4) for the reference group of Hispanic women of the same ages from the general population (Table 2).