In a Vision Mixer the pre-set bus is where the next video to be put on-line is selected. The preselect bus outputs the video signal that will be present at the main program output after the next T- Bar transition or autotake.
Potassium Sensitivity Test. This painful and unproven test consists of instilling a solution of potassium chloride, known chemically as KCl, into the bladder via urinary catheter and is thought to measure the permeability of the bladder to potassium in the diagnosis of I.C.
Pre-Service Training. The training program, usually 2-3 months long, that teaches volunteers language, cross-cultural sensitivity, and job skills before they begin their official service