This chapter deals with the two distinct aspects of materials selection: (1) Selection of fluoropolymers from the entire spectrum of materials such as metals, ceramics, and polymers and (2) Selection of a specific fluoropolymer.
System design, auxiliary equipment selection and selection of control strategies have effects on fuel cell efficiency, durability and reliability.
There are two main kinds of natural selection: stabilizing selection and directional selection.
The importance of heterozygosity in reproductive success may differ between years on account of fluctuating selection, countervailing selection for different fitness components or frequency-dependent selection [19], [27].
Another explanation could be that of natural selection or selection bias.
There are three types of natural selection: positive selection (sometimes referred to as directional selection), negative selection (referred to as purifying selection) and balancing selection.
(e.g., if M1a/M7 (neutral) can be rejected in favor of M2a/M8 (selection), positive selection is inferred).
Ka/Ks ratios >1, <1, and =1 are indicative of positive selection, purifying selection, and neutral evolution, respectively.
It is divided into six steps: Context Selection, Variables selection, Hypothesis formulation, Selection of subjects, Experiment design, Instrumentation and Validity evaluation.
So while there is no selection-for collectives being the unit of evolution, there is selection-of the conditions for them to be so [selection-of/selection-for as per Sober (1984)].
This method of selection, called genomic selection, is now being applied to dairy cattle, but results are not yet available.
