Abstract: An information processing device allocates each portion of a table used in query processing with respect to a database managed by the information processing device, as a portion under responsibility of each of a plurality of other information processing devices, and instructs the plurality of other information processing devices to perform processing with respect to the portion under responsibility by referring to another synchronized database managed by each of the plurality of other information processing devices.

Abstract: An ultrasonic oscillator retains transducers on a deformable concave portion, the transducers move in conformity with deforming of the concave portion, and the controller comprises receiver that receives sensing signals output from the sensing side transducers which sensed the ultrasonic waves oscillated from the oscillation side transducers, a distance calculation unit that calculates the distance between the oscillation side transducer and the sensing side transducer based on propagation time of the direct wave, an angle calculation unit that calculates a visual angle between a center axis of oscillation and the sensing side transducer viewed from the oscillation side transducer based on the sensing signal related to the direct wave, and a correction unit that corrects position information indicating a relative positional relationship between the plurality of transducers by using the distance and the visual angle.

Abstract: An information processing device allocates each portion of a table used in query processing with respect to a database managed by the information processing device, as a portion under responsibility of each of a plurality of other information processing devices, and instructs the plurality of other information processing devices to perform processing with respect to the portion under responsibility by referring to another synchronized database managed by each of the plurality of other information processing devices.