Ebara Corporation

Ntt Data Communications Systems Corporation

Nec Corporation

Mitsubishi Electric Corporation

Nec Communications Systems, Ltd.

Nec Communication Systems, Ltd.

Ohkura Electric Co., Ltd.

Texas Instruments Japan Limited

Mitsubishi Denki Kabushiki Kaisha

Advanced Telecommunications Research Institute International

Kenichi Abe

Tetsuya Ito

Yuichiro Ezure

Akira Matsumoto

Yuji Araki

Mitsutoshi Yahagi

Koji Mishima

Toru Yamamoto

Xinming Wang

Hiroyuki Iizuka

Masahito Iwai

Kikuo Sumiyoshi

Masumi Kaneuchi

Kenji Kurashina

Kenzou Kaji

Takahiro Hasegawa

Satoshi Nishikawa

Koichi Akiyama

Hiroaki Takahashi

Satoko Itaya

Yoshio Minami

Shusaku Hayashi

Yoshihisa Kondo

Masakazu Takabayashi

Yoko Suzuki

Peter Davis

Sadao Obana

Naoto Kadowaki

Jun Hasegawa

Hiroaki Ueno

Chikashi Ito

Yuichi Konno

Hidehiro Endou

Yoji Shigehata

Toshiyuki Inoue

Hitoshi Kirita

Yukiharu Imafuku

Kazuaki Narata

Tadao Odanaka

Atsushi Fujimura

Tomiya Nakano

Hiroki Iwamoto

Akitsugu Niwa

Yoshiaki Takakura

Dai Someya

Naoki Yokoyama

Akira Shimomura

Tomoyasu Nagayumi

Yuji Hozumi

The semiconductor laser device comprises a laser part, a waveguide for propagating laser light emitted by the laser part, and a photodetector for detecting the laser light which are formed on the same semiconductor substrate. The photodetector includes a p-type contact layer which is formed above the side of the waveguide on the side opposite to the semiconductor substrate and is connected to an anode electrode, an n-type contact layer connected to a cathode electrode, and an undoped layer formed between the p-type contact layer and the n-type contact layer. The undoped layer and the n-type contact layer in the photodetector include a main light receiving part disposed above the waveguide so as to encompass the waveguide, and an enlarged part disposed so as not to encompass the waveguide while connected to the main light receiving part.

Semiconductor laser device

Provided is an article position management apparatus that a receiver receives image data from a camera apparatus and that identifies a position of an article, based on an article marker attached to an article and a reference point marker whose coordinate information in an absolute coordinate system in a field is set in advance, the article marker and the reference point marker being included in the image data, when the camera apparatus is a mobile camera apparatus, and identifies the position of the article, based on the article marker included in the image, when the camera apparatus is a fixed camera apparatus.

Article position managing apparatus, article position management system, article position managing method, and program

Article position estimation system comprises: article movement recognition part; reference point recognition part; position information generation part; and article position estimation part. Article movement recognition part generates article movement information including time point when article is taken out by mobile body or time point when article placement is completed by mobile body. Reference point recognition part recognizes reference point and generates reference point recognition information including identification information according to recognized reference point, reference point recognition time point, and information related to recognized reference point. Position information generation part generates information related to position of mobile body at reference point recognition time point based on reference point recognition information. Article position estimation part estimates position of mobile body at the time when article is moved by using at least position of mobile body at reference point recognition time point.

Article position estimation system and article position estimation method

A multi-mode interferometric optical waveguide device includes: a multi-mode interferometric optical waveguide which includes a first reflective surface; a first single-mode waveguide connected to the multi-mode interferometric optical waveguide; and a second single-mode waveguide connected to the multi-mode interferometric optical waveguide and oppose the first reflective surface. Consequently, the multi-mode interferometric optical waveguide device can propagate light from the first single-mode waveguide to the second single-mode waveguide, with further reduced optical losses.

Multi-mode interferometric optical waveguide device and photonic integrated circuit

An optical modulator includes a plurality of Mach-Zehnder optical modulation units. Each of the plurality of Mach-Zehnder optical modulation units include a pair of first signal wirings, a pair of first ground wirings, a pair of first signal electrode pads, and a pair of first ground electrode pads. The pair of first ground electrode pads is displaced by less than the first interval from the pair of first signal electrode pads so as to separate from a center line of each of the plurality of Mach-Zehnder optical modulation units.

Optical modulator and optical transmission module

A sensor network systemis provided with a plurality of sensor nodes, . . . and configured to decide a parent node for each of the plurality of sensor nodes so as to form a network topology having a tree structure using each of the plurality of sensor nodes as a node. The sensor network system forms the network topology so that, with respect to each of the plurality of sensor nodes, the number of child nodes owned by the sensor node is close to a value obtained by multiplying a maximum containing number, which is a maximum number of sensor data that can be contained by one packet, by a natural number ().

Sensor network system, sensor network control method, sensor node, sensor node control method, and sensor node control program

A multihop wireless network includes a plurality of wireless nodes. Each wireless node calculates a metric value indicating a quantity of providing a guideline for selecting a superordinate destination node with each candidate for the superordinate destination node when carrying out a multihop wireless communication with a specific wireless node based on peripheral node information about node information received from the peripheral wireless nodes and determines the superordinate destination node based on the calculated metric value. The network system selects a superordinate wireless node as a target wireless node expected to change the number of the wireless nodes existing in a subordinate hierarchy, and intentionally changes a value of the node information sent from the target wireless node to the peripheral wireless nodes.

Path control method for multihop wireless network

When wireless communications are made between a first wireless device and a second wireless device along a route, two wireless devices which exist between the first and second wireless devices each determine the lowest maximum transmission rate (11 Mbps) in the wireless intervals on the route from themselves to the second wireless device to be their own transmission rate txRate (11 Mbps) and two other wireless devices which exist between the first and second wireless devices each determine the lowest maximum transmission rate (54 Mbps) in the wireless intervals on the route from themselves to the second wireless device to be their own transmission rate txRate (54 Mbps).

Wireless device which can improve stability in wireless communications and wireless network using the same

The present invention is to allow prompt and reliable synchronization of belonging information management table even in environments where there is a possibility of receiving update notification information from a plurality of wireless base stations, without needing unnecessarily large traffic for synchronization of belonging information management table. Wireless base station stores belonging information management table, to which belonging information of a terminal belonging to the base station is associated with, to new/old judgment information for judgment of new/old of update. Belonging information update unit performs update of belonging information including the new/old judgment information thereof. Further, upon receiving update notification information from other wireless base station, the belonging information update unit updates the belonging information management table based on the update notification information. The update notification information includes at least updated portion in the belonging information and new/old judgment information.

Wireless base station, communication system, belonging information management method and storage medium for storing program

A wireless apparatus which can realize a DFS function that avoidance of interference with radar is considered in an Ad-Hoc mode under a multihop circumstance is provided. A Beacon frame is transmitted at a shorter interval than a previously set interval when radar is detected by wireless apparatuses Nto Nwhich have a DFS function which perform avoidance of interference with radar.

Wireless apparatus, wireless communication system, control method, and control program

A conducting belt is used with an anode holder for supplying an electric current to an anode for plating a surface of a substrate such as a semiconductor wafer. The anode and the substrate are vertically disposed so as to face each other in a plating tank of a plating apparatus. The conducting belt includes a belt capable of contacting an outer circumferential edge of the anode and holding the anode.

Conducting belt for use with anode holder and anode holder

There is provided a plating apparatus and method which can control the temperature of a plating solution during plating more uniformly and easily form a uniform plated film on the to-be-plated surface of a workpiece, and which can simplify the device and decrease the footprint. The plating apparatus includes a plating bath having a double bath structure including an inner bath for holding a plating solution and carrying out plating, and an outer bath which surrounds the inner bath and is in fluid communication therewith. A heating device is disposed in the outer bath. The plating apparatus may further include means for circulating or stirring the plating solution in the plating bath.

Plating apparatus and plating method

Electrical contact for use in a plating apparatus

A substrate processing apparatus and method which employs the so-called batch processing method of processing a plurality of substrates simultaneously, thereby increasing the throughput, and which can carry out processing, such as electroless plating, stably and securely with a relatively simple apparatus. The substrate processing apparatus includes: a processing bath () for holding a processing liquid (); and a substrate holder () which is vertically movable relative to the processing bath () and which includes a plurality of substrate holding portions () for holding a plurality of substrates (W) in parallel. Each substrate holding portion () has a substrate stage () and a substrate presser (), which can move close to or away from each other and can grip therebetween a peripheral portion of a substrate to thereby hold the substrate with its back surface sealed, and has a heating medium flow passage () for passing a heating medium therethrough so as to regulate the temperature of the substrate holding portion ().

Substrate processing apparatus and method

Growing community of inventors

Tokyo, Japan

Kenichi Abe