Hitachi, Ltd.

Tetsuo Ito

Setsuo Arita

Hiroshi Sasaki

Yoshio Sato

Motohisa Nishihara

Nobuyoshi Tsuboi

Norifumi Miyamoto

Hideki Nihei

Hiroaki Koyanagi

Yukiharu Ohga

Fumio Murata

Hisashi Takano

Hiroshi Fukui

Satoshi Shimada

Moriaki Fuyama

Matahiro Komuro

Yohji Maruyama

Tomohiro Okada

Ryuji Watanabe

Satoshi Suzuki

Mitsuru Kudo

Atomi Noguchi

Hideyuki Sato

Wataru Kitaura

Yuichi Higashikawa

Miki Hara

Yuuzi Yamasawa

Toshiki Kaneko

Takao Sato

Yoshiharu Nagae

Akio Mukoh

Masaaki Kitajima

Hideaki Kawakami

Kanji Kawakami

Fumio Nakano

Masato Isogai

Koichi Chino

Tetsuro Minemura

Hidetoshi Abe

Masayoshi Suzuki

Hiroshi Kamimura

Hisashi Ando

Kazunari Kobayashi

Yoshihito Maeda

Masaichi Nagai

Atsumi Watanabe

Isao Sumida

Michio Ooue

Seiki Shimizu

Kazuya Kadota

Mitsuo Kinoshita

Akio Sagawa

Yasuo Nishizawa

Hiroshi Ujita

Yoshiyuki Nakagomi

Hiroji Mikawa

Masaya Tanuma

Kiyoshi Konno

Masao Miyake

Satoshai Shimada

Takao Akiyama

A method of forming a thin film magnetic head, including forming a first magnetic layer, forming a second magnetic layer as a magnetic flux passage in combination with the first magnetic layer, and forming a laminate structure body between the first magnetic layer and the second magnetic layer. The forming of the laminate structure body includes forming a third magnetic layer, a fourth magnetic layer and a non-magnetic conductive layer between the third magnetic layer and the fourth magnetic layer, projecting the laminate structure body more toward an air bearing surface than a projection of the first magnetic layer and the second magnetic layer toward the air bearing surface, and providing the laminate structure body with a width which is smaller than a width of the first magnetic layer and the second magnetic layer.

Method of forming thin film magnetic recording head with narrow track width performing high density recording at high driving frequency

A thin film magnetic head is providing for recording with less blur having a high recording magnetic field, for use in a recording/reproduction separation type magnetic head and a magnetic recording/reproducing apparatus. The thin film magnetic head, in which a gap film of a recording head and a magnetic film in contact with the gap film have the same track width, includes an upper magnetic film of the recording head and an upper shield film of a magnetic resistive film, each having a width wider than the track width, and a cross section parallel to the air bearing surface of the upper magnetic film is reduced at a position less than a gap depth from the air bearing surface. The thin film magnetic head has a coil conductor sandwiched by a first magnetic film and a fourth magnetic film, a second magnetic body magnetically connected to the first magnetic film, a third magnetic body magnetically connected to the fourth magnetic film, and a magnetic gap sandwiched by the second and third magnetic films, in which an insulating and non-magnetic single film in contact with the second and third magnetic films covers at least the first magnetic film.

Thin film magnetic recording head with very narrow track width

In an apparatus for operating and monitoring a plant, a manipulating device provides the plant with manipulation signals for operating the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a first display data producing device produces first display data needed for the operation of the plant changing every moment. On the basis of data supplied from the first display data producing device, a first display device displays information relating to the operation of the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a second display data producing device produces data needed for monitoring the plant. On the basis of data supplied from the second display data producing device, a second display device displays information relating to the monitoring of the plant on a larger display screen than that of the first display device. Information displayed by the first display device and information displayed by the second display device complement each other and make it possible to accurately operate and monitor the plant.

Plant operating and monitoring apparatus

Disclosed is an information processing system having a neural processing unit, an expert system for executing an inference using a rule, and an information selection unit. The neural processing unit and the expert system being arranged in parallel to each other. The information selection unit selects and outputs necessary information from the information outputted from the neural processing unit and the expert system. Since necessary information is selected and outputted from the information obtained from the neural processing unit and the expert system as a result of processing executed by the neural processing unit and the expert system in the parallelly different points of view, the certainty of the information to be selected is improved.

Information processing apparatus having a neural network and an expert

A multicontroller apparatus has a plurality of control units each including a controller and a diagnostic device for making a diagnosis of the controller. Each diagnostic device includes an apparatus for judging states of other control units by using output signals of diagnostic devices included in the other control units and an apparatus for executing a diagnosis of the associated controller which is a diagnosis object of the diagnostic device when the judging apparatus has judged that one or more other control units are not in the diagnosis state. Owing to the present invention, a necessary number of controllers which are in the controllable state can always be ensured in a multicontroller apparatus. Therefore, control by the multicontroller apparatus is always possible, and it becomes possible to make a diagnosis upon the multicontroller apparatus.

Multicontroller apparatus, multicontroller system, nuclear reactor

A multiplex control system has a plurality of control apparatuses, test signal generators provided, respectively, for the control apparatuses for the purpose of internal diagnosis thereof, signal selectors each for selecting a signal to operate a device under control from the signals produced by the control apparatuses, and diagnosis units each for deciding presence or absence of abnormality in the associated signal selector with the aid of the signals inputted to the signal selector and the output signal therefrom.

Multiplex control system

A multiplex control system has a plurality of control apparatuses, test signal generators provided, respectively, for the control apparatuses for the purpose of internal diagnosis thereof, signal selectors each for selecting a signal to operate a device under control form the signals produced by the control apparatuses, and diagnosis unit each for deciding presence or absence of abnormality in the associated signal selector with the aid of the signals inputted to the signal selector and the output signal therefrom.

Jet pumps and a feed water sparger are disposed in a reactor pressure vessel incorporating a core. A first feed water pipe supplies a portion of feed water to the jet pumps as their driving water. A second feed water pipe connected to the first feed water pipe supplies the remaining portion of the feed water to the feed water sparger. A first feed water heater is disposed in the first feed water pipe downstream of a connecting point of the first feed water pipe and the second feed water pipe. An amount of extracted steam introduced into the first feed water heater is controlled on the basis of a difference in the temperature between feed water flowing through the first feed water pipe and the feed water flowing through the second feed water pipe.

Nuclear power plant

Disclosed is a control system for a centrifugal thin film dryer wherein a slurry including solid matter is fed to a tubular heating surface and the a slurry is heated while blades are rotating inside the heating tube so that the a slurry turns into dry powder, the system comprising a plurality of thermal sensors located on the heating surface, a dry-up point calculator which measures the temperature distribution along the heating surface in accordance with the signals provided by the thermal sensors and calculates the point at which the temperature rise begins to saturate, a flow rate setting device which calculates the quantity of a slurry to be supplied in accordance with the output of the dry-up point calculator, and a flow rate regulator which controls a pump in accordance with the signal provided by the flow rate setting device.

Method and apparatus for controlling centrifugal thin film dryer

A laser light flux is divided and synthesized so that its light intensity distribution is changed from a Gaussian distribution to a non-Gaussian distribution. When a laser light flux having a Gaussian distribution is irradiated onto a dividing prism, it is divided into a left part and a right part which are refracted right and left inversely from each other. When the right and left parts are incident on a synthesizing prism, they are refracted again and travel to be overlapped with each other on a recording medium. The light intensity distribution on a segment at the apex of the synthesizing prism is weaker at the central part and stronger at the peripheral part. This is because the light fluxes resulting from the division are inverted in their position so that the central part of the Gaussian distribution is separated left and right while the peripheral part with a weaker light intensity is centered.

Optical recording and reproducing device

A film of a crystal - crystal phase transformation type optical recording alloy is formed on an insulating substrate. Information is erased from the alloy film by heating it with an expedient other than a laser beam. Information is read by sensing reflected light of light projected on the alloy film.

Optical information recording device

A light signal transmission/reception system which is provided, at the side of a transmitter for converting an electrical signal into a light signal and transmitting the converted light signal, with an inserting unit for inserting reference pulse signals onto the electrical signal; and is provided, at the side of a receiver, with a unit for deriving the amount of change in the reference pulse signals; unit for compensating for the magnitude of a received signal in accordance with the amount of the change; and a unit for removing the reference pulse signals from the compensated and received signal.

Light signal transmission/reception system

A photoresist process which comprises a process for spin-coating a substrate with a resist, a process for transferring a mask pattern onto the coated resist film followed by exposure, and a developing process for forming a pattern on the substrate after the pattern has been exposed. When the developed pattern of the resist pulsates with the increase or decrease of parameters in the process for applying resist, the value of the parameter is set to a value that corresponds to an extreme value of the pulsation.

Method of applying a resist

The present invention employs as a recording medium a metal or alloy which exhibits an intercrystalline transition before and after writing. In the present invention, two light beams of unequal wavelengths are used so as to write information with the light beam of the longer wavelength and to erase information with the light beam of the shorter wavelength. In changing a written content, a wavelength with which the reflection rate of the recording medium increases is used.

Optical information apparatus and method of recording and erasing

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Hitachi, Japan

Tetsuo Ito