A power switching device includes a power transmission unit and a driving unit. The methodology utilizes a split-screen display in which the arterial ultrasound image from an earlier examination is displayed on one side of the screen while a real-time \u201clive\u201d ultrasound image from a current examination is displayed next to the earlier image on the opposite side of the screen. Dense regions in the photoresist layer are exposed through a first mask under a first set of illumination conditions. The device is formed with sensors for detecting the driving state of the motor vehicle and for roadway conditions, with an electronic control device for processing the acquired signals and for selection of various controllable characteristics and at least one chassis bearing, the stiffness andor damping of which can be modified.