A holder for vacuum cleaner tools includes a flat plastic body mounted on a wall or between exposed studs on a wall with a panel bowed outwardly from the wall. The method comprises: segmenting image data of the structure of interest; and rendering two-dimensional images based on a function of the image data and the segmented image data within slabs defined by the segmented image data. The envelope component and the frequency-modulated component can be digitally processed by the digital signal processing unit to accomplish polar demodulation. an electric circuit switching consisting of at least one coil and at least one capacitor for tuning harmonic signals resulting from amplifier non-linearities. This pneumatic tire has a plurality of films disposed in the manner of fish scales in at least a region corresponding to a tread portion of an inner surface of the tire, each of the films being partially fixed on the inner surface of the tire, the fixed portions of the films being covered by the non-fixed portions of the other films. A third conductive layer is formed on the part of the dielectric layer placed above the first conductive layer, wherein the third conductive layer is insulated from the first and second conductive layers.