A bed is provided for supporting a patient thereon. The complex semiconductor device includes first memory chips in a first package, second memory chips in a second package configured for mass storage of data, and a controller packaged with either the first package or the second package in a complex package. Model fits to behavioral data show that sensitivity to electrical stimulation is not confined to the axon initial segment, but does fall off rapidly with the distance between stimulation and the initial segment. The low-resolution annulus data or the frame-meta annulus data is extracted from a data series of low-resolution that is video data having a less data amount or a series of frame metadata.