Abstract: There is provided an antenna device, a control method, and a program that control enabling or disabling of a plurality of IC card antennas by using a mobile terminal. The antenna device includes: a mobile terminal antenna that receives a radio wave output by a reader/writer provided in a mobile terminal; a plurality of IC card antennas that communicates with an IC card including an IC chip for the IC card that reads/writes data in a contactless manner in response to a command transmitted by the reader/writer; and a control circuit that operates by using power generated when the mobile terminal antenna receives the radio wave output by the reader/writer and controls enabling or disabling of each of the IC card antennas in response to the command transmitted by the reader/writer. The present technology is applicable to a playmat used for a card game using a smartphone having an NFC function and an IC card.

Abstract: There is provided a game mat, an information processing apparatus, and an information processing method that can manage information regarding a game played using cards, in association with a mat ID of a mat serving as a storage space of the cards. A game mat according to an aspect of the present technology is a mat including: a mobile terminal antenna that receives a radio wave output by a reader/writer of a mobile terminal that communicates with a server that manages a game using an IC card; an IC card antenna that communicates with the IC card including an IC chip for an IC card in which reading/writing of data is performed contactlessly by a command transmitted from the reader/writer; a memory that stores a mat ID, which is identification information of a mat; and an internal IC chip that receives a command transmitted from the reader/writer and stores, into the memory in association with the mat ID, information regarding the game transmitted from the server.

Abstract: There is provided an antenna device, a control method, and a program that control enabling or disabling of a plurality of IC card antennas by using a mobile terminal. The antenna device includes: a mobile terminal antenna that receives a radio wave output by a reader/writer provided in a mobile terminal; a plurality of IC card antennas that communicates with an IC card including an IC chip for the IC card that reads/writes data in a contactless manner in response to a command transmitted by the reader/writer; and a control circuit that operates by using power generated when the mobile terminal antenna receives the radio wave output by the reader/writer and controls enabling or disabling of each of the IC card antennas in response to the command transmitted by the reader/writer. The present technology is applicable to a playmat used for a card game using a smartphone having an NFC function and an IC card.

Abstract: [Object] To provide a signal transmission device and management system which are capable of transmitting a signal including information of an attachment target or information of the surrounding of an attachment target.

Abstract: [Object] To provide a signal transmission system capable of ascertaining positions or the like of mounting targets with more versatile and simpler configurations. [Solution] A signal transmission device including: a power generation unit configured to generate power in accordance with a surrounding environment; a first communication unit configured to send a signal using the power generated by the power generation unit; a storage unit configured to store communication control information for controlling the first communication unit; a communication control unit configured to control the first communication unit on a basis of the communication control information; and a contactless communication unit configured to receive rewrite information for rewriting the communication control information stored in the storage unit by contactless communication.

Abstract: [Object] To provide a signal transmission device and management system which are capable of transmitting a signal including information of an attachment target or information of the surrounding of an attachment target.

Abstract: [Solution] An information processing device, an information processing system, and an information processing method which can determine an estrus period of individual livestock while viewing a transition of the state quantity showing a characteristic change in the estrus period of livestock, and execute contact with a veterinarian and accumulation of information of the estrus period by an operation of causing the estrus period of livestock to be notified to a veterinarian when the estrus period has arrived.

Abstract: [Object] To provide a signal transmission system capable of ascertaining positions or the like of mounting targets with more versatile and simpler configurations. [Solution] A signal transmission device including: a power generation unit configured to generate power in accordance with a surrounding environment; a first communication unit configured to send a signal using the power generated by the power generation unit; a storage unit configured to store communication control information for controlling the first communication unit; a communication control unit configured to control the first communication unit on a basis of the communication control information; and a contactless communication unit configured to receive rewrite information for rewriting the communication control information stored in the storage unit by contactless communication.