The invention is a system and method of transmitting control information and user data, relating to multicast or broadcast services, between a first information entity within at least one mobile station and a second information entity within a controller of a wireless network in which the at least one mobile station is located. The apparatus also includes a clock signal generation circuit that includes fine and coarse capacitors. A groove defining a track width is formed on the primary insulating layer. The interface surface of the second interface part comprises an outer cone surface, which corresponds with the inner cone surface of the first interface part, and an inner cone surface, which corresponds with the outer cone surface of the first interface part. The anode hub may also define a catch space within the anode hub that is configured to catch the liquid metal in order to contain the liquid metal within the hub while in a non-rotating state and regardless of the orientation of the x-ray tube anode assembly. The response by the device may include a change of state of the device, and the response may be automatically performed after the user activity is determined.