In some embodiments control and status registers of a coherent InputOutput device coupled to a host system bus are mapped to a system memory. The method comprises the steps of: inserting a cylindrical hub into a center hole of the disk-shaped medium; and covering a hub adaptor, which is eccentrically fixed to a rotary shaft, with the hub so as to position the disk-shaped medium on the rotary shaft. A time reference corresponding to a stimulus is applied and further signal data is obtained from the time series, the further signal data being subsequent to the time reference. The ring-shaped mounting member is deformable with a force, so that the second engagement surface can slide along the first engagement surface to release ring-shaped bezel from the annular shell. The flow of the flow executor is generated by combining the functions of the selected process contents.