A Viterbi decoder includes a state metrics processor that generates survivor information. Each pixel region includes a first photodiode having a first area and a second photodiode having a second area equal to or smaller than the first area. The other end of the coupling line constitute the output port of the resonator portion, and is connected to the input port of the oscillating circuit, and the end portion of the coupled load that is not coupled to the abovementioned coupling line is grounded. The method further includes a comparison of the model with a run-time image at each of a plurality of poses. In response, the nano-box updates the application data with a current state of the application and transmits the updated application data over the network to be provided to the other nano-box.