Panasonic

About: Panasonic is a company organization based out in Kadoma, Ôsaka, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 49129 authors who have published 71118 publications receiving 942756 citations. The organization is also known as: Panasonikku Kabushiki-gaisha & Panasonic.

Data display device, integrated circuit, data display method, data display program, and recording medium

Abstract: A data display device for displaying, on a display unit, a group of images related to a plurality of pieces of file data comprises: an operation unit operable to receive, from a user, a display operation pertaining to the group of images related to the pieces of file data; a storage unit storing cluster information on clusters that are generated by grouping the pieces of file data according to a grouping condition; and a control unit operable to display, on the display unit, the group of images related to the pieces of file data so that the user can distinguish between clusters, in accordance with the display operation received by the operation unit and with the cluster information stored in the storage unit.

Mail notification apparatus and a mail notification method

Abstract: A mail notification apparatus is provided that enables a user of a cellular phone to know of the arrival of an electronic mail, even when the user is away from his/her office. The mail notification apparatus stores an electronic mail address of a local mail account in association with a mail address of a cellular phone. When it is determined that the electronic mail has arrived at the electronic mail address, the mail notification apparatus notifies, by using electronic mail, the arrival of the electronic mail to the cellular phone through the Internet and a communication vender mail server.

Information recording medium, information recording method and information recording/reproduction system

Abstract: An information recording medium including a plurality of sectors of the present invention includes: a first spare area including a spare sector for replacing a defective sector among the plurality of sectors; a defect management information area for managing the replacement of the defective sector by the spare sector; and a volume space in which user data can be recorded. The volume space is configured so that a second spare area including a spare sector for replacing a defective sector among the plurality of sectors can be additionally allocated. Location information indicating a location of the second spare area is recorded in the defect management information area.

Dual encryption protocol for scalable secure group communication

Abstract: A logical tree structure (10) and method for managing membership in a multicast group provides scalability and security from internal attacks. The structure defines key groups (20) and subgroups (24, 22), with each subgroup having a subgroup manager (12, 14, 18). Dual encryption allows the sender (12) of the multicast data to manage distribution of a first set of encryption keys whereas the individual subgroup managers (12, 14, 18) manage the distribution of a second set of encryption keys. The two key sets allow the sender (12) to delegate much of the group management responsibilities without compromising security because a key from each set is required to access the multicast data. Security is further maintained via a method in which subgroup managers (12, 14, 18) can be either members (18) or participants (14). Access to both keys is provided to members (18) whereas access to only one key is provided to participants (14). Nodes can be added without generating a new encryption key at the top level which provides improved scalability.

Magnetoresistance effect element

Abstract: A magnetoresistance effect element which comprises a substrate and at least two layers of magnetic thin films formed on the substrate via non-magnetic thin film layers The element is characterized in that the coercive forces of the magnetic thin films adjoining each other via the non-magnetic thin film layer are different and the thicknesses of the magnetic and non-magnetic thin film layers are 200 angstroms or less respectively The element exhibits a large rate of resistance change of several to several tens % in a small external magnetic field of about several to several tens Oe Therefore, a highly sensitive magnetic sensor of magnetoresistance type and a magnetic head of magnetoresistance type capable of high-density magnetic recording can be provided