R cs is the index of availability of school resources for mathematics instruction in class c at school s.
Variations in the proportion of browsed stems and the number of feces were not explained by broad-scale indices of food availability, density of edges between stands offering good cover and foraging opportunities, road density, elevation, or the area occupied by plantations and naturally regenerated stands around sampling plots.
In fact, all indices of the availability and use of heroin, including deaths due to heroin overdose, rose steadily during the study period, 41 as did the number of heroin dependent people being treated by methadone maintenance.
An unexpected finding was that the strongest correlations with infant percentage body fat were not indices of glucose availability but triglycerides (r = 0.67, P < 0.001), measured early, and FFAs (r = 0.54, P < 0.01) measured late in pregnancy.
Both indices of fruit availability were correlated (Spearman: R = 0.61, T = 3.68, P = 0.001, N = 25), and because several studies have found a positive relation between basal fruiting area of a tree and fruit crop size [Leighton & Leighton, 1982; Peters et al., 1988], we used only basal fruiting area of trees in further analysis.
We also use an agro-ecological potential score which is a composite index of moisture availability classification, rainfall (mm), average annual potential evaporation (mm), vegetation, potential for plant growth assuming that soil conditions are not limiting, and risk of failure of an adapted maize crop [35, 36].
We also found no significant relationship between infant mortality rate and the average monthly values of either rainfall (Fig. 3a) or an index of the availability of fruit (Pearson correlation, R2 = 0.002, n = 12, p = 0.88).
An index of prey availability will only be useful if it can account for the breadth and flexibility of California least tern diets across the range of the subspecies.
Wildebeest move at a weekly time step across the landscape, and their movements and local population growth are determined by a quantity we call Z, an index of resource availability.
cStandardized index of facility availability of 29 equipment, drugs, and supplies essential for maternal and neonatal care.
Sensitivity analysis: Analyses are presented for the index of geographic availability of orthopaedic surgeons calculated using a distance of 50 km.
