A method for imaging a flowing media within static regions includes obtaining a plurality of signals using the speckle properties of the flowing media. The present invention also aims to provide a foam molded body produced from the foamable resin composition. Moreover, even in the presence of another reserved program to reserve a recording only at a designated date, the date up to which the recording by the repetitive reserved program is executable can be calculated likewise, based on the recording time of the reserved program to be executed only at a designated date as well. cM1, cM, an N correlation units which are provided corresponding to the N possible symbols, respectively, each correlation unit detecting the degree of correlation with the radio signal received by the antenna, and a symbol determination unit which determines the symbol included in the radio signal received by the antenna based on the degree of correlation detected by the N correlation units. At least one predicate value based on data accessed is updated, as the database query is being executed, to increase filtering of data during remaining execution of the database query.