A method of tuning a high temperature superconductor resonator includes the steps of providing a HTS inductor and a HTS capacitor, the HTS capacitor being electrically connected to the HTS inductor. In addition, this system includes a plenum having a plurality of returns and an outlet. The sensors change output levels thereof upon detection of a user’s operation for initiating an image forming process. This is then covered by a sheath, e. The first expandable display element may be reformatted into an image, advertising material, or a plurality of hyperlinks. The device includes a setting unit, which is disposed outside the control chip and provides a setting signal, and a decoder, which is disposed inside the control chip, receives the setting signal, and generates a selecting signal according to the setting signal.