Abstract: An information processing apparatus acquires user features indicating features for each of a plurality of users and item features indicating features for each of a plurality of items, acquires time-series information indicating time-series interactions between the plurality of users and the plurality of items, constructs, based on the user features, the item features, and the time-series information, a graph including a plurality of user nodes representing the plurality of users, a plurality of item nodes representing the plurality of items, and links indicating interaction relationships in the plurality of user nodes and the plurality of item nodes, and extracts, from the graph, a node representation in the graph for any node among the plurality of user nodes and the plurality of item nodes.

Abstract: An information processing apparatus acquires factual features of each of a plurality of users as user features, creates a relationship graph indicating a social relationship among the plurality of users based on the user features, sets a target user among the plurality of users, and predicts a disease risk indicating the risk of developing at least one predetermined disease for the target user, based on the relationship graph and the user feature of the target user.

Abstract: An information processing apparatus acquires factual features of each of a plurality of users as user features, creates a relationship graph showing a social relationship between the plurality of users based on the user features, sets a target user among the users, sets at least one user related to the target user among the plurality of users as a related user based on the relationship graph, and estimates an attribute of the target user based on the user feature of the target user and the user feature of the related user.

Abstract: Provided is a technique for realizing targeting in which social connections are considered. An information processing apparatus acquires factual features of each of a plurality of users as user features, and based on the user features, creates a relationship graph showing a social relationship between the plurality of users, sets one or more users among the plurality of users as a target user group, and based on the relationship graph and the user features of the target user group, adds one or more users, among the plurality of users, having a social relationship with a user included in the target user group to the target user group and determines the resulting target user group as an expanded user group.

Abstract: An information processing apparatus selects, from a plurality of users, a model user group and a target user group that is different from the model user group, generates, for each user of the target user group, a user representation representing relationships with the plurality of users and the plurality of items, and predicts, based on the user representation, one or more users that have features similar to those of users included in the model user group, from the target user group, as a similar user group.

Abstract: An information processing apparatus acquires a factual feature of each of a plurality of users as user features, acquires features regarding a plurality of items as item features from a predetermined database, constructs, based on the user features and the item features, a graph including a plurality of user nodes representing the plurality of users, a plurality of item nodes representing the plurality of items, and links indicating mutual relationships between the plurality of user nodes and the plurality of item nodes, and extracts a node representation, in the graph, of any node of the plurality of user nodes and the plurality of item nodes from the graph.