A system and methods for connecting a computer and at least one computing appliance to a graphic user interface comprising a display and peripheral devices is disclosed. A circular frame member is put on one axial face of the circular rotor core. A buffer circuit is electrically connected between the scan-out output of the second flip-flop and the scan-in input of the first flip-flop for the next latch in the scan chain, the buffer circuit including a control element that controls the operation the first flip-flop to scan mode or low power leakage mode. The estimated values are compared to the determined horizontal resistivity and vertical resistivity.