The present invention relates to a communication system and communication method, an information processing apparatus and method, a device, a program, and a recording medium with which information communication can be performed securely and very conveniently by a simple configuration. The first and second groups of axial piston cylinders are driven by a common swash plate, and the first and second groups of axial piston cylinders are arranged with circumferentially displaced pitches. A pair of non-quadrature local signals having a phase difference of 90\xb0 plus a predetermined offset angle is produced by the divider and supplied to the mixers. The composite body has a diamond material layer formed from diamond crystals. The bridgeless power factor correction circuit further comprises two surge protection diodes coupled between the inputs of two boost converters and the output of the bridgeless power factor correction circuit.