Disclosed herein is an auricle-installed device including, a reference electrode to be placed on the ear lobe, a detection electrode to be placed on a surface exposed to bones surrounding the auricle of the ear, and a support body for supporting the reference and detection electrodes. A rope-fitting holder is threadably combined with a connecting base of a board body, having a center hollow. Different standard points and compensation difference for host-product or miscellaneous product are provided. Another embodiment of the invention includes a method reducing diameter recoil of stent upon expansion of the stent. A plurality of forecasted parameters for the at least one weather phenomenon is calculated.