Mitsubishi Denki Kabushiki Kaisha

Nec Corporation

Ntt Docomo, Inc.

Mitsubishi Denki K.k.

Kouichi Yamada

Seiichi Watanabe

Seiichi Handa

Masayoshi Shimamoto

Yoshiki Nakajima

Hirofumi Ouchi

Yoshio Kasuga

Masao Kouhashi

Tatsunori Hibara

Mitsuyoshi Yamatari

Hiromasa Ishii

Toshihisa Obuse

Masatoshi Mizuno

Kazuhiko Nakane

Masaharu Ogawa

Hajime Nakajima

Kyosuke Yoshimoto

Minoru Ozaki

Kunimaro Tanaka

Osamu Ito

Isao Watanabe

Koichi Takeuchi

Kazuhiro Mori

Mitsuo Maeda

Motomu Yoshimura

Mamoru Shinozaki

Fumio Matsuda

Kouichi Itou

Issei Nishimura

Kyousuke Yoshimoto

Noriko Ichikawa

Mitsuru Kodama

Masaya Ito

Kouichi Takeuchi

Kazushi Oota

Gentaro Washio

Takahiro Tsunoji

When, for example, an acceptance processing unit, among several acceptance processing units, performs acceptance processing of a reservation request, whether or not there is availability in resources of a video chat device assigned to the acceptance processing unit is checked, and if there is availability in the resource, the use of the resource is reserved.

Chat management system

In a point-to-multipoint system, the first communication processing apparatus generates a signal to inquire of the second communication processing apparatus about languages used in the second terminals and transmits the signal to the second communication processing apparatus. The second communication processing apparatus generates a second signal which includes data indicating the language which is used most in the second terminals and transmits the second signal to the first communication processing apparatus.

Broadcast communication system and method thereof in a point-to-multiport communication system

A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.

Complex magnetic head and manufacturing method of complex magnetic head core

A replica system and a method of producing a replica are provided for dealing with a database management system including both database programs and files. The system transmits and receives data between interfaces using a common data format, by including a replica manager which receives a replica instruction and determines an object to be read from a master database and an object to be written in a copy database, according to the replica instruction. By giving a command to the database management system, data associated with the object to be read is read from the database, and data format is converted into a standard data format. The received data is then converted to data format associated with the object to be written, and the converted data is finally stored in the copy database.

Replica system and method of producing a replica

Manufacturing method of complex magnetic head core

A network system temporarily stores all data base access commands transmitted from a test server in a command storage section, is in the stand-by state until a data base access command execution time written in one of the data base access commands comes, and reads out the data base access command from the command storage section, when the data base access command execution time has come, for accessing data base servers 1a to 1n, and also the network system temporarily stores all performance evaluation data for the data base servers 1a to 1n in a performance evaluation data storage section, reads out performance evaluation data from the performance evaluation data storage section when it is determined that execution of all data base access commands has been finished, and transmits the read-out data to the test server.

Network system

A microprocessor of CMOS structure includes at least an execution unit and a control unit including an instruction register adapted to receive and store instructions to be executed by the microprocessor and an instruction decoder receiving the instruction from the instruction register and outputting a control signal. Furthermore, the processor comprises a second instruction decoder receiving at least a portion of the instruction applied from the instruction register to the first instruction decoder so as to supply a standby control signal to the execution unit.

On demand powering of necesssary portions of execution unit by decoding

A recording device for recording information upon optically modulated overwritable magneto-optical recording medium including four magnetic layers first records DC '1' and then a test signal at high and low recording laser power levels upon a test track of the recording medium. The high and low recording laser power levels are successively modified to scan a two-dimensional region of the high and low recording laser power levels, and the optimal high and low recording laser power levels are determined on the basis of the reproduction signal levels corresponding to respective combination of high and low recording laser power levers. The reproduction signal levels are represented upon the .alpha.-K plane which is divided into six characteristic regions, The optimal combination of high and low recording laser power levels is determined as a representative point within the region of correct reproduction with a predetermined allowance.

Optically modulated overwritable recording device

A magneto-optical recording apparatus records an information signal on a disk by illuminating a magnetic layer on the disk with a pulsed laser beam having a frequency at least twice the maximum frequency of the information signal, and applying a magnetic field with a polarity switched according to the information signal to the spot illuminated by the laser beam. To ensure erasure of old information, the apparatus can modify the peak power level, bottom power level, duty cycle, or frequency of the pulsed laser beam according to the radial position of the beam on the disk.

Magneto-optical recording apparatus for creating magnetic domains with

An apparatus in accordance with the present invention sequentially fixes the wavelength of a light beam irradiated from a light source whose oscillation wavelength sequentially varies to a plurality of different wavelengths to a recording medium to required wavelengths each capable of forming a hole at absorption spectrum of the recording medium, synchronizes timing of change of the wavelength of the light source with timing of recording or regenerating each bit of information, records the optical hole formed in a manner that each bit of information corresponds to the wavelength varying in sequence, and detects the formed hole to regenerate information. Furthermore, the holes formed by the same wavelength are recorded at the positions separated by a distance capable of avoiding interference, while the holes formed by different wavelengths in correspondence to each bit of information are recorded at nearly the same position while that position is slightly displaced at a time, and thereby information is multiple-recorded with high density.

Frequency selective optical data record/regenerate apparatus

A carry circuit used in an arithmetic unit, such as an adder or a subtractor, has to process a carry operation for producing a carry signal to be transferred to the following carry operation stage according to a carry signal transferred from the previous carry operation stage. To process this carry operation at a high speed, an improved carry circuit performs two operations before the carry signal from the previous stage is received. One of the operations is processed by using a signal representing that the carry signal from the previous stage is present. The other operation is processed by using another signal representing that the carry signal from the previous stage is absent. These two operations have been terminated when the carry signal from the previous stage is received. The carry signal from the previous stage is used to select either one of results of the two operations. Thus, transmission of a carry signal to the following stage can be performed at a high speed.

Carry circuit suitable for a high-speed arithmetic operation

A data control circuit comprises a decoder adapted to generate weighted signals for determining the number of bits of data to be transferred; a detection circuit for detecting the output signals of the decoder to generate weighted signals corresponding to the transfer data bit number; and a propagation circuit responsive to the output signals of the detection circuit thereby to establish a propagation region where a predetermined signal propagates and a non-propagation region where the predetermined signal does not propagate and to generate from the non-propagation region the same number of activation signals as the bits of the data to be transferred.

Data control circuits

Growing community of inventors

Tokyo, Japan

Kouichi Yamada