An automatic system for managing an initial finding amount maintains an initial structure divided between two term investment vehicles, and reinvests the maturities each new term to maintain the initial funding amount. The material can be brought photocatalytically into a hydrophilic state by irradiation with light and into a lipophilic state by heating. In comparison with a conventional device, the threshold voltage is reduced, the channel resistance is lowered, and the drift region on-resistance is also lowered. The currently transmitted frequency is then compared with the received frequency to obtain a difference frequency from which an apparatus may estimate the distance. When a user touches the tray, electrostatic charges of the user are grounded by the connection of the base plate and the conductor. Hence, the number of end surfaces of the optical fibers can be increased tremendously during polishing so as to enhance the polishing speed and quality.