This reference model generates documents whose length is drawn from the lognormal distribution fitted to the empirical data (see Materials and Methods) by drawing words independently at random from the global Zipf frequency distribution (Fig. 1a).
We applied "the method of moments" to estimate α for each of the loci when analyzing empirical data (see Materials and Methods) (Tamura and Nei 1993).
Multiple methods are used to collect the empirical data, and the material is collected throughout the study.
Simultaneously, and blinded to the quantitative analyses, qualitative analyses would be based on grounded theory [ 63] with both induction and deduction utilised to draw together the empirical data with the theoretical material.
In the simulations with fixed substitution rates, we find 0.86% of the genes having ω > 1 when the divergence time is 6 My and the fraction of genes with ω > 1 decreases with increasing divergence time just as observed for the empirical data (supplementary table S1, Supplementary Material online).
Currently, we rely on empirical data to define the structure property link in the material design chain.
The cogitative faculty is primarily concerned with practical issues rooted in material being, forming judgments based on empirical data with the help of innate powers of abstraction and logical acumen.
Each of the research methodologies has uses one or more techniques to collect empirical data, including interviews, participant observation, fieldwork, archival research, documentary materials, etc.
Although variation provides the raw material for natural selection and evolution, few empirical data exist about the factors controlling morphological variation.
2.1, we simulated rate heterogeneity among species similarly to the observed in the empirical data, but analyzed the simulated data disregarding such heterogeneity (see supplementary methods, Supplementary Material online).
