For the specified $nPid, it will measure the average of 10 snapshots of the cpu usage in a whole of 1 second (delay of 0.1s each * nTimes=10); that provides a good and fast accurate result of what is happening in the very moment. Tweak the variables to your needs.
The Quiet Revolution was a period of unbridled economic and social development in Quebec and Canada and paralleled similar developments in the West in general. It was a byproduct of Canada's 20-year post-war expansion and Quebec's position as the leading province for more than a century before and after Confederation.
The term silent revolution refers here to a shift in the prevailing paradigm for international economic and political relations, away from tendencies toward autarky, insularity, mercantilism, and governmental planning and control over economic activity; and toward a common set of beliefs and policies based on open international trade and finance, competitive pricing and production decisions, and cooperation between countries.