Hitachi, Ltd.

Hitachi Microsoftware Systems, Inc.

Hitachi Information Systems, Ltd.

Manabu Sasaki

Shigeyuki Nishitani

Kazuo Shigematsu

Masahiko Takahashi

Yasushi Hayasaka

Yasushi Fukuda

Michihiro Mese

Hideaki Nagashima

Kimiyoshi Ohno

Tsuneaki Amanuma

A permanent-magnet generator rotor comprising a first rotor shaft end portion having in the axial center a hollow portion through which a bolt is passed; a second shaft end portion having in the axial center a hollow portion and a bearing portion through which the bolt is passed. A magnetic cylindrical body is sandwiched between the first and second shaft end portions. The permanent-magnet generator rotor includes the magnetic cylindrical body fixed between the first and second shaft ends, a permanent magnet held on the outer circumferential surface of the magnetic cylindrical body; a non-magnetic cylindrical body shrink-fit onto the outer circumferential surface of the permanent magnet; a stator disposed around the permanent magnet; and the bolt penetrating through the first and second shaft ends; the hollow portions in the generator, and the magnetic cylindrical body.

Permanent-magnet generator rotor for gas turbine, manufacturing method therefor, and gas turbine

In an apparatus and method for information storage and retrieval, information is retrieved from the storage apparatus in a manner which includes varying an operational parameter of the storage apparatus according to a property of the information being retrieved. In the same apparatus and method, information is stored onto the storage apparatus in a manner which includes varying an operational parameter of the storage apparatus according to a property of the information to be stored. In this way, the energy consumption of the storage apparatus can be kept low.

Method and apparatus for reading and writing information onto and from information recording disks

An information processing system which includes at least one terminal having input apparatus for inputting data to the system and transmission apparatus for outputting the data inputted from the input apparatus, a display for displaying data, a communication line for transmitting data outputted from the terminal, and a control unit having at least one receiver buffer for storing data transmitted from the terminal via the communication line. The control unit is operable to display the data, which is stored in the receiver buffer, on the display.

Information processing system

Growing community of inventors

Hitachi, Japan

Manabu Sasaki