The present invention provides methods for the preparation of compounds of the formula :. The system receives first operation information and second operation information concerning the image forming apparatus. A request is received from a user in a first community, the request indicating a desired text-based messaging session with a user in a second community. The socket further includes connecting metals provided for relative motion with respect to the socket body and for moving the latches away from the receptacle portion against the springs, slots and projections restricting motion magnitude toward the bottom surface of the receptacle portion at a predetermined value. Also, in some cases, the heat sink modules may be electrically isolated from one another, allowing for the heat sink assembly itself, in part or in whole, to function as part of the desired circuit.