First digital audio-visual program video component are switched on a second digital audio-visual program video component by switching on the beginning of the first set of images including an Intra-coded picture of the second program video component encountered after the switching command. A mean-variance efficient frontier is calculated based on input data characterizing the defined expected return and the defined standard deviation of return of each of the plurality of assets. An exact or ratioed replica of the inductive-capacitive resonant circuit, controlled by the same capacitance selection signal, may be used as a frequency-selective amplifier load or matching network, or to form a ladder filter. In one configuration, the work station has a work bench portion which can be raised or lowered relative to a base portion, wherein in the lowered position, the base portion is positioned in an interior space of the work bench portion.