Abstract: A power-receiving-side control circuit of a power reception device performs intermittent load modulation by causing an NMOS transistor to be turned ON/OFF during normal power transmission. A power-transmission-side control circuit included in a power transmission control device of a power transmission device monitors, an intermittent change in the load of the power reception device during normal power transmission. The power-transmission-side control circuit determines that a foreign object has been inserted between a primary coil and a secondary coil and stops power transmission when an intermittent change in load cannot be detected. The amount of power supplied to the load may be compulsorily reduced when the load state of the load is heavy.

Abstract: A mobile electronic device includes a communication unit connected to a network to which one or more content playback devices and one or more content holding devices are connected, a location query request sending unit that sends to the content playback devices on the network a location query request about content being played back by a content playback device connected to the network, a location query response receiving unit that receives a location query response about the content through the communication unit via the network in accordance with the location query request, a provision request sending unit that sends a provision request for providing the content through the communication unit to a content holding device that holds the content in accordance with the received location query response, and a content receiving unit that receives the content through the communication unit via the network in accordance with the provision request.

Abstract: A power amplifying apparatus includes an input terminal configured to receive an input signal, a first power amplifier biased for class A or class AB operation which is configured to amplify the input signal, an output terminal connected to an output of the first power amplifier, a second power amplifier biased for class C operation which is configured to receive and amplify a part of the input signal, and a switch connected between an output of the second power amplifier and the output terminal.

Abstract: An information processing apparatus includes: an information storage; a relevant information detector detecting pieces of information having a predetermined relevance to one another from pieces of the information stored in the information storage; a relevancy information storage storing relevancy information indicating that the detected pieces of information are pieces of information having the predetermined relevance to one another; and an information processor for providing access control to a desired piece of information in the information stored in the information storage if the processing for providing access control to the desired piece of information is designated, and for detecting another piece of information having the relevance to the desired piece of information for which the processing for providing access control is designated, on the basis of the relevancy information stored, and performing the processing for providing access control to the detected other piece of information having the relevan