A heat radiator for dissipating heat from an electronic device, which is mounted on a board or which is installed in a casing, to the outside thereof is basically composed of a substrate having plenty of through holes, which are produced by press molding and sintering. According to one aspect of the invention, a method for performing a complex digital filter is described. An arrangement of the energy application element with respect to the object is determined depending on the positions of the energy application part and the sensing part with respect to the energy application element as defined by the energy application element representation and depending on the object representation. A query is processed based on the compressed page by identifying a set of tuple identifiers mapping to stored data in support of the query.