Mitsui Chemicals, Inc.

Mitsui Toatsu Chemicals, Incorporated

Anritsu Corporation

Other

Sumitomo Electric Industries, Limited

Shinji Ogawa

Toshiaki Kakii

Hidetoshi Ishida

Masanobu Ajioka

Hiroshi Kimura

Masatoshi Takagi

Masayuki Sakai

Shoji Hiraoka

Hiroshi Suizu

Yuji Terado

Hiroyuki Suzuki

Kazumichi Miyabe

Shoichi Nakamura

Yasushi Kotaki

Atsushi Motoyama

Anri Muto

Seiya Iguchi

Junji Sato

Yoshirou Hirai

Naoto Ogasawara

Yoji Hasegawa

Ryo Shinagawa

Makoto Furukawa

Shigeru Hirata

Nobuyuki Yoshino

Daichi Imabayashi

Kuniyasu Kobayashi

Hiroaki Furuichi

Junya Tanaka

Toshio Katoh

Ryohei Itatani

Takeshi Noguchi

Yoshihiro Irizato

Yasuyuki Matsuyama

Makoto Sukegawa

Atsushi Miura

Takashi Ooe

Akiko Miura

Satoshi Morita

Atsushi Takai

Susumu Fukawa

Hideharu Kuwamoto

Katsuhiko Machida

Yoh Ohmori

Shinji Aso

In a control devicehaving a control unitthat controls an NR measurement deviceand an LTE measurement deviceand a display unitthat displays control contents of the control unit, the control unitcontrols the display unitsuch that the display unitdisplays an NR simulation parameter display areaor an LTE simulation parameter display areain accordance with the communication standard of the selected NR or LTE, in a case where the selection of either NR or LTE is received on the communication standard identification tabsandof the main screen

Communication terminal measurement system, communication terminal measurement apparatus, and measurement-related information display method

A control deviceperforms the simulative communication operation on a measurement devicefor transmitting and receiving signals between the base transceiver station compliant with the first communication standard and the terminaland a measurement devicefor transmitting and receiving signals between the base transceiver station compliant with the second communication standard and the terminal. In the control device, the display control unitperforms display in a form in which the same number of graphic forms as the number of base transceiver stations compliant with the first and second communication standards are arranged in association with one first cell icon indicating that the base transceiver station is compliant with the first communication standard and one second cell icon indicating that the base transceiver station is compliant with the second communication standard.

Measurement device, communication terminal measurement system, and measurement-related information display method

In a control deviceconstituting a communication terminal measurement apparatus, a display control unitdisplays an NR connection confirmation/support screenindicating a connection mode for connection between an NR measurement deviceand a communication terminal, and an LTE connection confirmation/support screenindicating a connection mode for connection between a LTE measurement deviceand the communication terminal. Further, information on the signal of the NR communication standard is attached as a text to the image of the port through which the signal of the NR communication standard is input and output, and information on the signal of the LTE communication standard is attached as a text to an image of the port through which the signal of the LTE communication standard is input and output.

Communication terminal measurement apparatus and measurement-related information display method

A mobile terminal testing apparatus capable of facilitating a setting of a combination of frequency bands of carrier aggregation and a setting of frequency information of each band and easily performing a test of the carrier aggregation is provided. A mobile terminal testing apparatus includes a control unit () that acquires UE capability information of a mobile communication terminal (), displays a list of combinations of frequency bands set in a carrier aggregation band combination list of the UE capability information, and sets frequency information of each cell of carrier aggregation according to a frequency band in a combination selected from the list.

Mobile terminal testing apparatus and frequency information setting method therefor

A production process of high molecular weight polysuccinimide having a weight average molecular weight of 40,000 or higher is disclosed, which comprises the following steps: 1) mixing and heating aspartic acid and an acidic catalyst to produce a liquid, low molecular weight polymer mixture, 2) separating the acidic catalyst to appropriate extent from the liquid, low molecular weight polymer mixture, thereby directly changing a polymer-containing phase from a liquid phase into a solid phase to produce a solid, low molecular weight polymer mixture, and 3) conducting solid-state polymerization on the thus-obtained solid, low molecular weight polymer mixture. This process can be practiced in a simple apparatus, and is free of problems such as formation of a highly viscous phase, excessive formation of foam, and formation of a reaction mixture into coherent mass.

Production process of polysuccinimide

An adapter for an optical connector comprises a pair of wall portions and on a mounting surface . The structure allows the adapter to accommodate an optical connector inserted from a direction vertical to the mounting surface , and allows the adapter to accommodate an optical connector inserted along a predetermined axis . On this account, it is possible to insert the connector along the predetermined axis to the housed optical connector . Since the optical connector is mated to and demated from the optical connector in this sort of adapters, force applied to an optical module is decreased in mating/demating the connector. An optical module product includes the optical module , a coated optical fiber , the optical connector , and the optical connector's adapter . An optical module mounting substrate product includes the optical module product and a substrate for mounting thereon the optical module and the adapter for optical connectors.

Optical module connector adaptor

The invention relates to a process for producing an aliphatic polyester excellent in stability which includes subjecting an aliphatic polyester containing at least 50% of an aliphatic hydroxycarboxylic acid unit, obtainable by solid-phase polymerization under a flowing gas in the presence of a volatile catalyst so as to have a desired weight average molecular weight within the range of 50,000 to 1,000,000, to a heat treatment at a temperature equal to or higher than the reaction temperature of the solid-phase polymerization under a flowing gas with maintaining the aliphatic polyester in a solid state. According to the process of the invention, an aliphatic polyester excellent in stability at molding and storage stability is obtained.

Process for producing aliphatic polyester excellent in stability

An impregnated cathode and a method of manufacturing the same are provided for suppressing emission of unwanted electrons and particles generated from an excess electron emitting substance so as to achieve a steady electron emission characteristic. The impregnated cathode is placed directly beneath an electron emission hole of a first grid. The impregnated cathode is made up of a first sintered porous element whose surface functions as an electron emitting region and a second sintered porous element whose surface is a peripheral region other than the electron emitting region. The porosity of the first sintered porous element is greater than that of the second sintered porous element. Not only the first sintered porous element having the electron emitting region but also the second sintered porous element corresponding to the region around the electron emitting region is impregnated with the electron emitting substance. In addition, the amount of the electron emitting substance per unit volume contained in the first sintered porous element is greater than that contained in the second sintered porous element.

Impregnated cathode and method of manufacturing same, electron gun and electron tube

A process for producing aliphatic polyester wherein a crystallized aliphatic polyester prepolymer formed from an aliphatic dihydric alcohol and an aliphatic dicarboxylic acid and having a weight-average molecular weight of 2,000 to 100,000 is caused to undergo solid-phase polymerization in the presence of a volatile catalyst to make an aliphatic polyester having a weight-average molecular weight of 50,000 to 1,000,000. This process is more efficient than any prior process calling for a complicated step for catalyst removal, since it enables the removal of the catalyst from the reaction system during and/or after solid-phase polymerization. The polyester is comparable in stability to any aliphatic polyester having any catalyst removed therefrom.

Process for preparing aliphatic polyester

Impregnated cathode having varying surface porosity

A novel urethane compound utilized as a raw material of block isocyanate, diisocyanate, developing agent for thermosensible paper, powder paint and the like is provided, and it is a biscarbamate represented by the following general formula (1):

Urethane compound and process for producing polycyclic aliphatic diisocyanate

The invention provides a process for producing high-molecular aliphatic polyesters capable of being substitutes for general-purpose resins that are required to have high toughness, in a simplified manner and at a high volume efficiency. Specifically, in the process, used as the starting material is an easily-available, low-molecular aliphatic polyester prepolymer to be prepared through polycondensation of inexpensive materials of an aliphatic hydroxycarboxylic acid such as lactic acid, glycolic acid or the like, an aliphatic polyalcohol such as butanediol or the like, and an aliphatic polycarboxylic acid such as succinic acid or the like, and the starting prepolymer is crystallized and thereafter polycondensed in a solid phase in the presence of a catalyst to give the intended, tough and high-molecular aliphatic polyester.

Preparation process of polyester

An optical fiber array according to the present invention comprises an optical coupling end face to be optically coupled to another optical line, and one ends of a plurality of optical fibers are arrayed in the optical coupling end face. The optical fiber array comprises a lower plate (3a) comprising a plurality of V-shaped grooves (4) for positioning the optical fibers exposing from one end of a ribbon part of the optical fibers, and an upper plate (3b) for pressing each optical fiber provided in each V-shaped groove (4) of the lower plate into the positioning groove. A boundary portion between the ribbon part (7) and the optical fibers (1) is fixed between the first and second plates (3a, 3b) by heat resistant adhesive (10), and the optical fibers from the boundary portion to a front end are fixed by solder (6) in an airtightness state. Accordingly, the hermetic sealing with sufficiently high airtightness can be achieved.

Optical fiber array

In a process for producing isopropyl alcohol by direct liquid phase hydration of propylene and water in the presence of a strong acid solid catalyst at a high temperature and a high pressure, the reaction is carried out at a temperature in a ranging between 100.degree. and 250.degree. C. and a pressure in a ranging between 60 and 200 atm in an excess of water. Then, a liquid phase of the reaction product is contacted with an extraction agent of a saturated hydrocarbon having 3 or 4 carbon atoms at a temperature in a ranging between the critical temperature of the extraction agent and the temperature higher than the critical temperature by 40.degree. C. under a pressure ranging between the critical pressure of the extraction agent and 200 atm at an S/F ratio ranging between 0.3 and 3 which is calculated from the equation of the amount of the extraction agent divided by the amount of the extract feed. Finally, after isopropyl alcohol is extracted from the liquid phase, it is separated from the resultant extract phase thus obtained. According to this process, the energy required for concentrating isopropyl alcohol is reduced, and also large-scale production facilities are not necessary.

Process for producing isopropyl alcohol

An optical fiber array according to the present invention includes an optical coupling end face to be optically coupled to another optical line, and first ends of a plurality of optical fibers are arrayed in the optical coupling end face. The optical fiber array includes a lower plate (3a) having a plurality of V-shaped grooves (4) for positioning the optical fibers exposed from one end of a ribbon part of the optical fibers, and an upper plate (3b) for pressing each optical fiber provided in each V-shaped groove (4) of the lower plate into the positioning groove. A boundary portion between the ribbon part (7) and the optical fibers (1) is fixed between the first and second plates (3a, 3b) by heat resistant adhesive (10), and the optical fibers from the boundary portion to a front end of the array are fixed by solder (6) to achieve hermetic sealing.

Parallel transmission module for transmitting a plurality of optical

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Kanagawa, Japan

Shinji Ogawa