The mower includes a frame which is supported for movement upon a plurality of ground engaging wheels and upon which are supported a motor generator set, an internal combustion motor and a plurality of reel lawn mowers. The device and the method can obtain a high-quality decoded signal even if a large quantization distortion is caused in the lower-band spectrum data. In an accumulation mode, current flows through the overall racetrack-shaped channel. A ring or loop-shaped ridge is formed to project from a connection surface of the lens, and has a ring shape. One embodiment includes an integrated component having a layer containing a nickel-palladium alloy. Finally, the method computes the similarity score using the target feature vector and the model feature vector.