Kokusai Denshin Denwa Kabushiki Kaisha

Kddi Corporation

Kokusai Denshin Denwa Co., Ltd.

Kdd Corporation

Satoru Takagi

Atsushi Ito

Masatoshi Suzuki

Masahiro Saito

Yuichi Matsushima

Hideaki Tanaka

Hidenori Aoki

Kenichi Asakawa

Shigeki Muramatsu

Takanori Kobayashi

A map information transmission device includes: a dividing unit configured to divide a region of a map into a plurality of sub regions based on superimposition positions at which a plurality of objects are to be displayed superimposed on the map, the dividing unit performing the division such that a number of objects included in each of the sub regions is a predetermined number or lower; a unit configured to generate, for each of the sub regions, a merged image that includes objects included in a sub region; a unit configured to generate, for each of the sub regions, display code that includes clipping information that designates a clipping region of the merged image that corresponds to the sub region; and a unit configured to transmit the merged image and the display code to a map display device.

Map information transmission device for transmitting objects for display superimposed on map, map display device, and method

A method of transferring file of the present invention by the two simultaneous data transmissions comprises the steps of transmitting data in a forward direction starting from a first specified position to a bottom in the file, and transmitting data in a backward direction starting from a second specified position to a top in the file. And a method of transferring file in FTP of the present invention comprises the steps of establishing a control connection, establishing multiple data connection, dividing a file into segments from each arbitrary point in the file, transferring segments through each of the multiple data connections, respectively, and synthesizing file from the segments transferred through the multiple data connections.

Method of transferring file

A map display system includes a plurality of geographic information servers, a geographic information search server and clients, connected to each other through network. The geographic information search server searches a plurality of geographic information servers and generates a combination list containing information of existential place of the plurality of geographic information servers. The clients obtain a plurality of geographic information from the plurality of geographic information servers designated by the combination list and display the obtained plurality of geographic information while superimposing them so that the coordinates thereof coincide each other on the same screen.

Map display system

A remotely operated submersible robot 10 is provided with two differential triaxial orthogonal dc magnetic sensing units, 1 and 2, each comprising two triaxial orthogonal dc magnetic sensors spaced at a predetermined distance apart and with their corresponding axes set in parallel; each triaxial orthogonal dc magnetic sensor incorporating three dc magnetic sensing elements sensitive only to a magnetic field in a specific axial direction and disposed such that the axial directions of respective dc magnetic sensing elements cross each other at right angles. Analog signals sent out from the differential triaxial orthogonal dc magnetic sensing units 1 and 2 are converted into digital signals by an analog-to-digital converter, and transmitted to a mother ship 20 via a tether cable 6. The output signals thus transmitted from the aforesaid sensing units are processed by a processing unit installed in the mother ship 20 to compute the distance to a submarine cable, a difference in elevation between the submarine cable and the submersible robot, and the direction of the submarine cable laid down, which are shown on a display.

Maritime apparatus for locating a buried submarine cable

An optical short pulse generating device is disclosed, in which semiconductor laser light of a fixed intensity is launched into a first semiconductor electroabsorption optical modulator which is driven by a 0V or forward bias voltage and a sinusoidal voltage, and the output light from the first optical modulator is launched into a second electroabsorption optical modulator to which is applied a bias voltage and a sinusoidal voltage having delayed from the said sinusoidal voltage for a period of time corresponding to the phase reversal thereof, whereby it is possible to generate optical short pulses of a repetition frequency twice higher than the oscillation frequency of a sinusoidal voltage generator.

Growing community of inventors

Tokyo, Japan

Satoru Takagi