Ntt Docomo, Inc.

Hidetoshi Ueno

Hideharu Suzuki

Shoji Kurakake

Yusuke Fukazawa

Takefumi Naganuma

Shoichi Horiguchi

Norihiro Ishikawa

Hiromitsu Sumino

Masashi Onogi

Kentaro Kakami

Midori Onogi

Kimihiko Sekino

Mirai Hara

Tomoyuki Ohya

Takeshi Yoshimura

Takeshi Kato

A content evaluation apparatus and a content evaluation method that can distribute contents that a user potentially needs without any omissions. A history class separation unit generates a separation plane for separating in a separation plane a characteristic vector of a selected content and characteristic vectors of non-selected contents stored in a browsing history table. A user characteristic vector calculation unit generates a user characteristic vector based on an orthogonal vector perpendicular to the separation plane thus generated and stores the user characteristic vector in a user characteristic vector management table. Subsequently, when a recommendation request receiving unit receives a recommendation request, a content evaluation unit evaluates the contents based on the stored user characteristic vector.

Recommendation information evaluation apparatus using support vector machine with relative dissatisfactory feature vectors and satisfactory feature vectors

A recommendation information generation apparatus and a recommendation information generation method that can select a similar user appropriately even if the amount of history information is small. In an information distribution server, a user characteristic vector calculation unit calculates a user characteristic vector of each of users, and a similar user calculation unit calculates the degree of similarity between the users based on the calculated user characteristic vector of each of the users. The similar user calculation unit then selects a similar user who is similar to a first user based on the calculated degree of similarity. A relevance evaluation unit generates recommendation information for the first user based on the characteristic vector of the selected similar user.

Recommendation information generation apparatus and recommendation information generation method

A digital rights management system () includes a content server () that stores contents created by content creators, a mobile device () that acquires and uses a desired content from the content server, and a data preservation server () that preserves the content used by the mobile device so as to enable the content to be uploaded and downloaded. The content server is configured to create rights information for the content, the rights information containing availability of backup saving of the content in the data preservation server, and to deliver the content and the rights information to the mobile device in response to a request from the mobile device. The mobile device is configured to create backup data when using the content based on the availability of backup saving and transmit the backup data to the data preservation server for preservation of the backup data.

Digital right management system, content server, and mobile terminal

A data backup system includes a mobile device, a data storing apparatus for backup-saving user data used in the mobile device, and a user management apparatus for managing user information about a user using the mobile device, where the device and apparatuses communicate with each other. When the mobile device is a replacement for an old mobile device, the user management apparatus stores and manages a device ID of the mobile device in association with an old device ID of the old mobile device and personal identification information of a user using the mobile device and who has used the old mobile device. When downloading old user data previously used in the old mobile device from the data storing apparatus, the mobile device creates and transmits a user data acquiring request message with an old device user data acquiring request flag activated to the data storing apparatus. If the flag is set in the user data acquiring request message, the data storing apparatus verifies identification of the user with respect to the user management apparatus. If the identification of the user of the mobile device and the old mobile device is verified, the data storing apparatus retrieves and transmits the old user data to the mobile device.

Data backup system

A data receiving apparatus has a unidirectional channel receiver for receiving segmental data forming an electronic file, through a unidirectional channel; a file assembler for restoring the electronic file, based on the segmental data received by the unidirectional channel receiver; a channel information memory for acquiring location information for specifying a location of the electronic file; and a bidirectional channel transmitter/receiver for establishing a bidirectional channel when there arises a need for retransmission of the electronic file, for sending a request for transmission of the electronic file to a data transmitting device specified by the location information, through the bidirectional channel, and for receiving the electronic file through the bidirectional channel.

Data receiving apparatus and data receiving method

A document conversion method for converting a first structured document F, formed based on a first document type definition D, to a second structured document F, formed based on a second document type definition D, the document conversion method including analyzing the document type definition Dand document type definition Dand extracting a difference document type definition, generating a conversion template Tdescribed therein a conversion rule which prevents the structured document F, which is the result of document conversion process, from being contradictory to the document type definition D, based on the results of the analysis, and performing document conversion process using the conversion template T

Method and system for converting structured documents

It is an object of the invention to measure a communication data volume for each service type in measuring a communication data volume in a charging process and the like. The invention comprises a plurality of measuring pointstofor measuring a communication data volume and a data relaying apparatusfor transmitting received data to any of the plurality of measuring pointsto. The data relaying apparatushas a service-type judging meansfor judging the service type of the received data, a measuring point determining meansfor determining the measuring pointstoto which the data is to be transmitted based on the service type and a data transmission meansfor transmitting the data to the measuring point thus determined, and each of the plurality of measuring pointstohas a communication data measuring means for measuring the communication data volume of the data received from the data relaying apparatus

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Yokosuka, Japan

Hidetoshi Ueno