Abstract Life expectancy is widely used and reported; for example, the UN Human Development Index uses life as a key component. But many users of period do not understand interpret demographers do. In particular, almost always over-predicts crude death rate. Indeed, in most observed populations, annual deaths recorded are less than one may expect corresponding stationary population. To explain ...

The previously published procedure for calculation of rate constants associated with the death of microbial cells is shown to be so sensitive to variation in experimental data as to render it impractical for this application. The only obvious modification to the published procedure met with only limited success. It is concluded that a fresh search should be undertaken for the solution to this f...

An article on the study, " Medical cannabis laws and opioid analgesic overdose mortality in the United States, 1999-2010, " was published in the October 2014 issue of JAMA Internal Medicine. In an invited commentary about the study published in the same issue, Marie of Maine, wrote: " The striking implication is that medical marijuana laws, when implemented, may represent a promising approach f...

for fighting with blights and studying on effect of thickness, two experiments were done. the first series were included independent variable ages of blight in four levels (age1,age2,age3 and age4) and the thermal care temperature in four levels(10,15,20 and 30 seconds) and the dependent variable is death rate . the second series were included independent variables thermal care temperature in t...