Semiconductor devices required forming a stress control film to handle different stresses on each side when optimizing the stress on the respective P channel and N channel sections. The system is characterized in that the one or more groups of workers may be activated during contact center business activity to perform services based on need. A weir is positioned at the axially opposite end of said bearing and radially inward of the bearing outer race and oil entry surface such that in use the radial height difference between oil entry surface and weir provides a pumping force and supplies a film of oil between the bearing outer race and its casing. An example system includes a portable, flexible, belt like sensing device that is positioned proximate the subjects scalp.