Abstract: A management device which manages a battery, and obtains information of the vehicle via the battery, wherein the battery used in the vehicle has unique information written thereto, which includes at least any of vehicle-related information related to the vehicle and usage history information indicating how the battery has been used in the vehicle, and the management device is disposed in a station, and comprises a reading section which reads from the unique information a battery used in the vehicle; and a presenting section which, based on the unique information read by the reading section, extracts and presents identifying information which identifies the battery which is a candidate for exchange with the battery used in the vehicle.

Abstract: A battery detachable to an electrically driven vehicle includes a deterioration displaying section which displays, visibly to an outside, a deterioration degree indicating a degree of deterioration of the battery at a present time regardless of the charge amount of the battery at a present time.

Abstract: The management system includes a store terminal, a management device which is disposed in the station installed within a predetermined distance range from the store and manages the battery, a user terminal, and a server. When the store terminal detects that a user who possesses a user terminal which received an electronic coupon visits the store, it transmits, to at least one of the server and the management device, record information including information indicating a visit record.

Abstract: A conversation member optimization apparatus includes: a conversation analyzing unit configured to recognize sound signals in a plurality of conferences held in the past for each conference and analyze conversations in the conferences for each conference; an estimating unit configured to estimate feature quantities in combinations of the members who participate in the conferences to be held on the basis of results analyzed by the conversation analyzing unit and in accordance with a member selecting instruction used to select members who participate in conferences to be held; and a member selecting unit configured to select the members on the basis of the results estimated by the estimating unit.

Abstract: A conversation data acquiring unit acquires conversation data indicating speech of each speaker in a conversation. A conversation state analyzing unit analyzes an amount of speech of each speaker in the conversation and a degree of influence of the speech of each speaker on the conversation on the basis of the conversation data. A role determining unit determines a role of each speaker in the conversation on the basis of the amount of speech and the degree of influence of the speaker.

Abstract: A conversation member optimization apparatus includes: a conversation analyzing unit configured to recognize sound signals in a plurality of conferences held in the past for each conference and analyze conversations in the conferences for each conference; an estimating unit configured to estimate feature quantities in combinations of the members who participate in the conferences to be held on the basis of results analyzed by the conversation analyzing unit and in accordance with a member selecting instruction used to select members who participate in conferences to be held; and a member selecting unit configured to select the members on the basis of the results estimated by the estimating unit.

Abstract: A conversation data acquiring unit acquires conversation data indicating speech of each speaker in a conversation. A conversation state analyzing unit analyzes an amount of speech of each speaker in the conversation and a degree of influence of the speech of each speaker on the conversation on the basis of the conversation data. A role determining unit determines a role of each speaker in the conversation on the basis of the amount of speech and the degree of influence of the speaker.