PROBLEM TO BE SOLVED: To provide a system for transmitting a message to promote the conveyance of information according to the connection of users in information conveyance and its characteristics.;SOLUTION: A propagation result management part 3 acquires conveyance characteristics as data showing the activity of the conveyance of a message between users. A distribution situation management part 2 acquires conveying situations including information for identifying a user who has received a target message and the information of a time at which the use has received the message being data representing situations in which a certain message is conveyed between the users. A distribution comparison/analysis part 4 compares the conveyance characteristics with the conveyance situations, and determines the significance of the promotion of the conveyance of the target message with a prescribed standard. A promotion information generation part 5 generates a conveyance promotion message to promote the conveyance of the target message when it is determined that the promotion of conveyance is necessary by the distribution comparison/analysis part 4. A promotion information transmission part 6 transmits the conveyance promotion message generated by the promotion means to the user of the destination.;COPYRIGHT: (C)2010,JPO&INPIT
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