Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Hitachi-Lg Data Storage, Inc.

Other

Tohken Co., Ltd.

Hitachi High-Tech Corporation

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Hitachi Media Electronics Co., Ltd.

Shinji Fujita

Takeshi Maeda

Takahiro Kurokawa

Manabu Shiozawa

Masayuki Inoue

Kunikazu Ohnishi

Yukio Fukui

Shigeru Nakamura

Takeshi Shimano

Hiroshi Morita

Osamu Kawamae

Tsuyoshi Wakuda

Kenichi Shimada

Hidenori Shinohara

Masaaki Kurebayashi

Motomune Kodama

Masahiko Takahashi

Yasuyuki Sugi

Toshio Sugiyama

Takakiyo Yasukawa

Satoshi Ichimura

Katsuhiko Izumi

Li Lu

Yota Ichiki

Nobuo Imada

Mitsuhiko Ota

Motofumi Kashi

Masato Suzuki

Koichiro Nishimura

Masayuki Kobayashi

Tomomi Okamoto

Fumio Isshiki

Kenji Akahoshi

Kohei Yamaguchi

Kenichi Kawamura

Manabu Katsuki

Makoto Hosaka

Norimoto Ichikawa

Hikaru Kurosaki

Yuta Ishii

Jun Nukaga

Hiroshi Miyao

Hideki Ogata

Nobuyuki Maeda

Daigo Komesu

Takuya Himi

In the connection portion for a superconducting wire, a plurality of superconducting wires are integrated by a sintered body containing MgB, end portions of the superconducting wires each having an outer peripheral surface of a superconducting filament exposed are inserted into a container in parallel. The container has an opening having a diameter larger than a wire diameter of the superconducting wires on at least one side in a longitudinal direction of the superconducting wires, and the sintered body is in contact with the outer peripheral surfaces of the superconducting filaments. The method for connecting a superconducting wire includes: exposing the outer peripheral surfaces of the superconducting filaments; inserting the superconducting wires into the container; filling the container with a raw material; and heat-treating the raw material to generate the sintered body. The raw material is pressurized in parallel to the longitudinal direction of the superconducting wires and then heat-treated.

Connection portion for superconducting wire and method for connecting superconducting wire

A combustor includes: a combustion cylinder; and a combustion-chamber forming member disposed so as to be at least partially inserted into the combustion cylinder and forming a combustion chamber with the combustion cylinder. A radial-direction gap for introducing film air is formed between the combustion cylinder and the combustion-chamber forming member. A gas turbine includes a combustor; a compressor for generating compressed air; and a turbine configured to be rotary driven by combustion gas from the combustor.

Combustor and gas turbine

A superconducting wire connector includes superconducting wires and a sintered body containing MgB. The superconducting wires are connected by the sintered body. At least one of the superconducting wires includes a superconducting core having a first outer surface. The sintered body is in contact with the first outer surface. A method of connecting superconducting wires by a sintered body containing MgBincludes exposing a superconducting core of at least one of the superconducting wires by removing a portion, positioned in the middle in a longitudinal direction of the at least one of the superconducting wires, of a metal sheath disposed around the superconducting core, disposing the at least one of the superconducting wires through a container, filling the container with a raw material of MgB, and forming the sintered body being in contact with an outer surface of the superconducting core by sintering the raw material filled in the container.

Superconducting wire connector and method of connecting superconducting wires

An object of the present invention is to provide a stationary induction electric apparatus that can improve insulating performance with a few additional structures. In the stationary induction electric apparatus comprising: an iron core; a low-voltage coil conductorwound on the iron core; an insulatorenclosing the low-voltage coil conductor; and a high-voltage coil conductorwhich is wound on the insulator and to which a voltage is applied from the outside, a first shield conductorwound adjacent to the inner peripheral surface of the insulator, a second shield conductorwound adjacent to the outer peripheral surface of the insulator, one end of the first shield conductor, and one end of the second shield conductor are electrically connected to any region of the high-voltage coil conductor.

Stationary induction electric apparatus

A stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

Stationary induction electrical apparatus

Provided are an optical information reproduction device and a method therefor with which the influence of reference light reflected from the surface of a disk can be reduced, thereby enabling data to be reproduced in a stable manner in an optical information reproduction device that uses holography. The information reproduction device, which reproduces from a recording medium information that has been recorded on the recording medium by the formation of a hologram, is equipped with: a light output unit that emits laser light; an optical system that generates reference light from the laser light emitted from the light output unit; an objective lens that reproduction signal light reproduced by the reference light with which the recording medium has been irradiated enters; a light detector that receives the reproduction signal light propagated by the objective lens; a medium-reflected light reduction unit that reduces the amount of medium-reflected light (generated when the recording medium reflects the reference light) with which the light detector is irradiated; and a control unit that controls the operation of the information reproduction device.

Optical information reproduction device and optical information reproduction method

In a recording/reproducing device for recording and reproducing an optical disk, when performing verify processing of inspecting a quality of recorded data and compare processing of inspecting whether the recorded data can be read without errors, a time is taken because the same area needs to be reproduced two times. The verify processing and the compare processing are performed at one time reproduction. To perform the verify processing and the compare processing simultaneously, a recording quality storage part is provided in the recording/reproducing device, and reproduced data is transmitted to a host controller while storing quality information at the time of reproduction by an instruction of the host controller. The host controller performs the compare processing by comparing transmitted data and data at the time of recording and inspects the recording quality by acquiring the quality information of a reproduced area from the recording/reproducing device at intervals set in advance.

Recording/reproducing device and optical disk library device

A storage system having a plurality of optical disc devices allows other optical disc devices inside the storage system to reproduce the optical disc recorded by a certain optical disc device but inhibits optical disc devices outside the storage system to reproduce the optical disc. A device key as a base for generating an encryption key is common to the plurality of optical disc devices. In the optical disc devices, a guest key other than the device key can be used temporarily to generate the encryption key. An authentication list containing a reproduction condition is recorded with the key information to the optical disc.

Optical disc, optical disc recording method, optical disc reproduction method, optical disc device and storage system

An optical disk recording method includes the steps of: providing a multi-pulse chain from a recording wave; independently changing the pulse rise timing and pulse fall timing (pulse width) of the first pulse in the multi-pulse chain in accordance with a preceding space length and a recording mark length; changing the pulse rise timing and pulse fall timing (pulse width) in accordance with a following space length and the recording mark length in a predetermined timing or in independence; and in relation to the smallest mark recorded by irradiation with mono pulse, changing the rise timing in accordance with the preceding space length and the recording mark length and the fall timing (pulse width) in accordance with the following space length and recording mark length, compensating various optical disks different in recording material without change of the fundamental waveform.

Highly adaptive recording method and optical recording apparatus

An optical disc recording method for recording disc information to be used in recording/reproducing control on an optical disc, comprises the following steps of: providing a first disc information unit and a second disc information unit, each having a predetermined data size, in a predetermined management information area of the optical disc; the disc information includes write strategy information; separating the write strategy information into first write strategy information and second write strategy information; recording the first disc information into the first disc information unit; and recording the second disc information into the second disc information unit.

Optical disc and optical disc apparatus

There is provided a method of calculating the degradation over time of the quality of data recorded on an optical disk in a short time. In the method, when user data is recorded on a data area, a test signal including a component in which the signal level is smaller than a reference value, is recorded on a test area. Then, the test signal is reproduced from the test area when a predetermined time has passed, to calculate the quality degradation of the user data from the evaluation result. Alternatively, every time when the user data is recorded/reproduced on/from the data area, the test signal is recorded/reproduced repeatedly on/from the test area. Then, the test signal is reproduced from the test area at a predetermined timing, to calculate the quality degradation of the user data from the evaluation result.

Recording quality evaluation method of optical disk and optical disk storage system

In an optical disk library device using a plurality of optical disk devices, before optical disk devices execute recording or reproduction of information to or from optical disks, self-monitoring information is acquired from an optical disk monitor, use preferential orders of the optical disk devices are evaluated on the basis of use frequency information or deterioration information included in the self-monitoring information and an optical disk device to be used for recording or reproduction of information is selected on the basis of the use preferential orders.

Optical disk library device and optical disk device selecting method

An optical disc apparatus includes an optical pickup including: a light source; an objective lens for converging a light flux emitted from the light source and forming an optical spot on an information recording plane of an optical disc; and an optical modulation unit divided into a plurality of areas for modulating an area containing a main beam of the light flux to change a shape of the optical spot, wherein data is reproduced by converting a reproduction signal read from the optical disc with the optical pickup into an NRZI signal of a predetermined modulation rule by a PRML method. An optical spot shape, laser power setting and PRML setting are changed with each optical disc and each drive operation state.

Optical disc apparatus and optical disc recording/reproducing method

Growing community of inventors

Yokohama, Japan

Shinji Fujita