Abstract: A positioning system includes a plurality of beacon modules and a communication device. Further, the communication device includes a calculation unit calculating action state data that are used for determining an action state of a user who carries the communication device; a searching unit selectively searching for one of the beacon modules in accordance with the action state of the user, the action state being determined based on the action state data calculated by the calculation unit, and a derivation unit deriving positional information of the user based on a response signal transmitted from the one of the beacon modules having been searched for by the searching unit.

Abstract: An arbitration device comprises a determining unit that determines priority of each of a plurality of electrical devices according to at least either a position or an action status of a person present in a target area for control; and a calculating unit that calculates electrical power to be allotted to each of the electrical devices in such a way that a total of electrical power allotted to a plurality of the electrical devices is within a limit value and the electrical devices having the priority at high levels are allotted with electrical power on a priority basis.

Abstract: An information processing device includes: a posture change determining unit that determines, based on an output value of an inertial sensor, whether a posture state of a moving object has changed; a reference orientation generating unit that, when it is determined that the posture state of the moving object has changed from a first posture state into a second posture state, generates a reference orientation corresponding to an orientation of the moving object at that time calculated from the output value of the inertial sensor; and an orientation error calculating unit that, when it is determined that the posture state of the moving object has changed from the second posture state into the first posture state, calculates an error of an orientation of the moving object according to the reference orientation, and an orientation at that time calculated from the output value of the inertial sensor.

Abstract: A direction estimating device estimates a user direction indicating a direction of a body of a user. The direction estimating device includes: a storage unit that stores direction information indicating a direction determined in advance as the user direction of when the user operates an input device with a particular attitude; a detecting unit that detects that the user is in the particular attitude; and an estimating unit that estimates the user direction based on the direction information when the user has been detected to be in the particular attitude.

Abstract: An arbitration device comprises a determining unit that determines priority of each of a plurality of electrical devices according to at least either a position or an action status of a person present in a target area for control; and a calculating unit that calculates electrical power to be allotted to each of the electrical devices in such a way that a total of electrical power allotted to a plurality of the electrical devices is within a limit value and the electrical devices having the priority at high levels are allotted with electrical power on a priority basis.