A control rod for a nuclear reactor has a structure which is capable of suppressing expansion of a reduced-diameter portion of a neutron absorber in a radial direction under shocks applied upon every stepwise driving of a control rod cluster and which can ensure integrity of a cladding tube over an extended period. The apparatus has adjustable delay circuitry within the circuits and the adjustable delay circuitry adjusts the timing of signals processed within the circuit. The EPG data service further includes a thumbnail cache manager storing thumbnails in a database and serve the thumbnails to the application. The center portion of the housing may include a slot or pocket for engagement by a tool to twist the center portion with respect to the periphery and thereby facilitate rupture of the bridges, andor may include indicia to identify presence of the RFID tag in the insert. In the preferred form, the support collar includes a key for seating within a keyway lining the selected club port, to prevent relative rotation between the golf club and the platform. Said universal serial bus is electrically contacted to and embedded on a sliding mechanism which is settled on a built-in fixed bed at one inner side of said shell, whereby said universal serial bus can be slide out from and stored in said shell by the means of said sliding mechanism.