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Helix , sheet , and turn structures are determined using the investigator 's personal criteria . Abstract : Genetic diversity among reed ( Phragmites australis ) populations from 70 sites in Europe and from 12 sites in other continents was determined using the random amplified polymorphic DNA ( RAPD ) technique . The degree of correlation between gender gap scores and adolescent fertility rates was determined using the product-moment correlation coefficient , r , for both 1995 and 2005 . The federal share of total Medicaid program costs is determined using the FMAP , a statutory formula that calculates the portion of each state 's Medicaid expenditures that the federal government will pay . Standard errors of the velocity and delay parameters are determined using the resampling technique of `` bootstrapping '' ( Efron and Gong , 1983 ; Efron and Tibshirani , 1991 ; Koch , 1992 ) .