Abstract: An information retrieval device includes a degree-of-association information storage unit capable of storing an item(s) of degree-of-association information indicating a degree of association between each of an item(s) of first information and each of an item(s) of second information; an accepting unit that accepts a query including an item(s) of query information which is/are an item(s) of information used for retrieval of content; a query converter that obtains, by using an item(s) of first information corresponding to each of the item(s) of query information, and the item(s) of degree-of-association information, an item(s) of second information whose degree of association with the item(s) of first information is greater as a predetermined condition is better satisfied; and a retrieval unit that retrieves content by using the item(s) of second information obtained by the query converter. Accordingly, content necessary for a user can be retrieved.

Abstract: An information retrieval device includes a degree-of-association information storage unit capable of storing an item(s) of degree-of-association information indicating a degree of association between each of an item(s) of first information and each of an item(s) of second information; an accepting unit that accepts a query including an item(s) of query information which is/are an item(s) of information used for retrieval of content; a query converter that obtains, by using an item(s) of first information corresponding to each of the item(s) of query information, and the item(s) of degree-of-association information, an item(s) of second information whose degree of association with the item(s) of first information is greater as a predetermined condition is better satisfied; and a retrieval unit that retrieves content by using the item(s) of second information obtained by the query converter. Accordingly, content necessary for a user can be retrieved.

Abstract: A relevance index correction apparatus includes an attribute information obtainer, a relevance index generator, and a specific relevance index calculator. The attribute information obtainer obtains, in response to selection of a specific piece of advertisement information that is to be posted on a web page, attribute information related to the specific piece of advertisement information. The relevance index generator generates an apparent relevance index and a mean relevance index. The apparent relevance index indicates an apparent degree of relevance of the attribute information with respect to the specific piece of advertisement information. The mean relevance index indicates a mean degree of relevance of the attribute information with respect to all of a plurality of pieces of advertisement information.

Abstract: A profit index value generation system includes a profit index value calculating unit. The profit index value calculating unit calculates a profit index value related to a link destination web page in accordance with (i) a selection probability value that indicates a probability of selection of link information, the link information being posted on a link source web page displayed on a display screen of a terminal and being linked to the link destination web page on which advertisement information is posted, and (ii) an expected profit value that indicates an amount of profit which is expected to be generated as a result of the advertisement information being displayed on the display screen together with the link destination web page.

Abstract: An advertisement extraction device according to the present application has a calculating unit, a tallying unit, and an extracting unit. The calculating unit calculates a hypothetical advertisement effect for each user attribute of a user, based on a delivery history regarding advertisement content delivery to a terminal device used by the user. The tallying unit tallies up an advertisement effect for each piece of advertisement content in which a user attribute as a delivery object has been decided, through the use of the hypothetical advertisement effect corresponding to the user attribute as the delivery object in the advertisement content among the hypothetical advertisement effects for each of the user attributes calculated by the calculating unit. The extracting unit extracts the advertisement content as a delivery candidate, based on the advertisement effect tallied up by the tallying unit.

Abstract: An advertising distribution device 1 has a detection unit P1 for detecting that a banner image B is selected, an acquisition unit P2 for acquiring attribute information F1 about the terminal 2, and a distribution unit P4 for changing a distribution mode depending on the attribute information F1 and distributing advertising information A after selection of the banner image B.

Abstract: An advertisement information providing device includes an advertisement content storage unit that stores advertisement content of a plurality of types. The advertisement information providing device includes an expected earning calculation unit that calculates expected earnings per unit impression number for each type of the advertisement content or for a combination of a plurality of types of the advertisement content. The advertisement information providing device includes an advertisement content type determination unit that determines which type of the advertisement content or combination of types of the advertisement content is to be delivered based on the expected earnings. The advertisement information providing device includes an advertisement content delivery unit that acquires the type of the advertisement content or combination of types of the advertisement content and delivers the advertisement content to an advertisement space.

Abstract: An advertisement information providing device, includes: an advertisement content storing unit configured to store impression-guaranteed type advertisement content and pay-per-click type advertisement content; an advertisement content type determining unit configured to determine which type of advertisement content between the impression-guaranteed type advertisement content and the pay-per-click type advertisement content to deliver when a page browsing request is received from a terminal device of a user; and an advertisement content delivery unit configured to determine advertisement content of the type determined by the advertisement content type determining unit among advertisement content stored in the advertisement content storing unit and deliver the advertisement content determined to an advertisement space included in a page for which the page browsing request is received from the terminal device of the user.