Data-driven configuration of various views on data models. In a specific embodiment, a spherical sample having a composition of BaTiO3 and a weight of about 20 mg is subjected to a rapid solidification and melting process 3 times while levitating the sample in 4. The radio base station 1 manages the radio mobile terminals 2-1 to 2-N by executing discrimination as to whether they are in the power-saving mode of the part-time duty service operation or in the normal mode of the full-time duty service operation.