The problem of the Paleocene is that, of all the chronostratigraphic units of the Tertiary, it alone is defined on the basis of nonmarine strata, making recognition of its upper limit and general correlation difficult elsewhere.
The results were presented on the basis of age sex strata for the mean and various percentiles of exposure (Kuiper-Goodman et al., 2010).
Patients were prospectively stratified on the basis of 6 predefined strata: 2 nodal-status categories (positive, negative) by 3 adjuvant-treatment categories (chemotherapy, hormonal therapy, chemotherapy plus hormonal therapy).
In the first method, 25(OH D measurements were categorized on the basis of their distribution within a particular stratum of cohort, sex, and season of blood collection, with stratum-specific quartiles among VDPP controls used as cutpoints.
For years investigators determined the relative ages of sedimentary rock strata on the basis of their positions in an outcrop and their fossil content.
Multidimensional/multilevel analysis is directly applied to define high risk strata on the basis of multiple individual, structural, contextual (ecological) and service-related components.
The stratification is optimized by a novel method (Ospats), an iterative procedure that re-allocates grid points to strata on the basis of pairwise differences between predictions and covariances of prediction errors.
The study exhibits distinct stratification (five different strata) on the basis of mean height of the species such as emergent (>20 m), canopy (>10 20 m), understorey (>5 10 m), shrub (<5 m including sapling of the tree species) and ground (<1 m including the saplings of both tree and shrub species).
John Playfair carried out a second survey of Schiehallion in 1811; on the basis of a rethink of its rock strata, he suggested a density of 4,560 to, though the then elderly Hutton vigorously defended the original value in an 1821 paper to the Society.
