Many theorists attribute the preceding sorts of variation to context-sensitivity in the relevant modals.
Artificial selection, however, which works on the same sorts of variation as its natural counterpart (Darwin 1859), has effected stunning changes in domesticated plants and animals that have helped to feed a hungry world.
The other direction I have taken has been to look at mechanisms, and the original inspiration for my work in this area was early work that Tim Mitchison and I did on dynamic instability of microtubules [ 10], because here was a process that generated all sorts of variation most of which was useless but all of which was available to future modification.
Here you'll find all sorts of variations and themes explored.
Things are far from perfect, but I have spent a lot of time of late writing about all sorts of variations on the traditional model, "sit in your chair and do your job the way I tell you".
Pension specialists have created all sorts of variations on the DROP -- the "drip," the "plop," the "backdrop," and so on, allowing workers to come in and out of the plans, for example.
They went through all sorts of variations before becoming what we know today, so making something new feels more like adding to a tradition, rather than just plundering a text".
Which is to say: It seems to me, from talking to women, that all this stuff happens, all the time, in all sorts of variations, and some women take it "seriously" and are seduced by it, and some aren't.
Through the years, I've experimented with all sorts of variations, from the addition of chicken liver (which my wife likes, because that's what her mother used to do) to the canonical ragù, using three kinds of meat (pork, veal, pancetta) and three kinds of liquid (wine, milk, tomato paste).
In an appendix to Professor Fogel's book, Chulhee Lee, a former research associate at the University of Chicago and now an assistant professor at Seoul National University, presents evidence that increases in these sorts of variations account for much of what looks like a rise in income inequality from 1969 to 1989.
In the coming years, we'll see all sorts of variations of OLEDs in various devices.
