A system and method for controlling any of a variety of permanent magnet motors includes normalizing motor parameters with respect to demagnetization current of a motor and developing a torque-per-current relationship using the normalized motor parameters at approximately maximum torque. , and two or more high temperature zones in which each \u0394T is 15 to 35\xb0 C. For instance, a lightguide of the lighting apparatus may sequentially receive light from the one or more light sources as directed by the one or more light source controllers and may direct the light to provide illumination for a display. An electron source such as thermionic filaments are disposed between the phosphor-coated anode pads and the translucent pane. The reference monitor maintains an updateable storage area whose contents can be used to affect access decisions, and access decisions can be based on arbitrary properties of the request. Thus, once bookmark call operation is performed while a desired background screen is being displayed, the currently-displayed background screen is maintained as-is, and the called detailed setting window is displayed on the background screen.