Patents by Inventor Takashi Matsui
Takashi Matsui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240126119Abstract: An illumination unit according to the present disclosure includes a plurality of first light-emission blocks, a plurality of second light-emission blocks, and a light-emission controller. The first light-emission blocks each include a plurality of first light-emitting devices arranged in a first direction. The second light-emission blocks are partially overlapped with the respective first light-emission blocks, and each include a plurality of second light-emitting devices arranged in a second direction different from the first direction. The light-emission controller performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks.Type: ApplicationFiled: December 21, 2023Publication date: April 18, 2024Inventors: Hiroaki MATSUI, Takashi IKUTA
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Patent number: 11957455Abstract: A bioinformation acquiring apparatus includes at least one processor and a memory configured to store a program to be executed in the processor.Type: GrantFiled: September 23, 2020Date of Patent: April 16, 2024Assignee: CASIO COMPUTER CO., LTD.Inventors: Mitsuyasu Nakajima, Kouichi Nakagome, Takashi Yamaya, Yasushi Maeno, Akira Hamada, Shinichi Matsui
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Publication number: 20240120595Abstract: This battery unit is a battery unit including a battery pack that houses a battery cell, and a water-cooling medium flow path formed outside a bottom surface of the battery pack, in which the water-cooling medium flow path is made of a Zn-based plated steel sheet, an inorganic film or a resin film is formed as a chemical conversion coating film on a surface of the Zn-based plated steel sheet, and the inorganic film contains a Si-based component or a Zr-based component as a main component.Type: ApplicationFiled: February 7, 2022Publication date: April 11, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Kyohei MIYAKE, Atsuo KOGA, Kohei UEDA, Yutaka MIKAZUKI, Katsunari NORITA, Sho MATSUI, Takashi OKE
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Publication number: 20240118486Abstract: It is an object of the present invention to provide a multicore optical fiber, a design method for the multicore optical fiber and an optical transmission method using the multicore optical fiber including four cores having a standard cladding diameter of 125±1 ?m for an existing single mode optical fiber covering several thousands of kilometers of transmission. The multicore optical fiber according to the present invention disposes two-stage claddings with different refractive indices around each core, and designates as a predetermined range, a core radius a1, a radius a2 of a first cladding region surrounding each core, specific refractive index ?1 relative to the core of the first cladding region and a specific refractive index ?2 relative to the core of a second cladding region including four cores and the first cladding region.Type: ApplicationFiled: December 21, 2023Publication date: April 11, 2024Inventors: Takashi Matsui, Kazuhide Nakajima
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Patent number: 11956504Abstract: Provided is a content distribution server which is able to establish restrictions on the public disclosure of an object displayed in virtual space at the convenience of the distributor. The content distribution server comprises: a distribution unit that distributes live content for synthesizing video in virtual space using information from the distributor as virtual character information; and a first setting receiving unit that receives from the distributor terminal used by the distributor public disclosure restriction settings for establishing restrictions on objects present in virtual space displayed on the distributor terminal that can be viewed on a viewer terminal used by a viewer to view live content.Type: GrantFiled: July 8, 2022Date of Patent: April 9, 2024Assignee: DWANGO CO., LTD.Inventors: Nobuo Kawakami, Kentarou Matsui, Shinnosuke Iwaki, Takashi Kojima, Naoki Yamaguchi
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Publication number: 20240102886Abstract: An object of the present invention is to provide an evaluation method and an evaluation device for easily determining whether or not a structural parameter of a multi-core fiber satisfies a desired connection loss value (a specification). The evaluation method according to the present invention includes a step of measuring center coordinates of each core with the center coordinates when a clad is approximated by a circle as an origin in an observed cross-sectional structure of the multi-core fiber to be objected, obtaining a length of a line segment connecting the origin and the center of each core and an angle formed by two line segments connecting the origin and two adjacent cores, and judging whether or not a desired connection loss characteristic is satisfied on the basis of whether or not the values satisfy a predetermined determination formula.Type: ApplicationFiled: December 11, 2020Publication date: March 28, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Nobutomo HANZAWA, Takashi MATSUI, Yuto SAGAE, Kazuhide NAKAJIMA
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Patent number: 11942074Abstract: A learning data acquisition device or the like, capable of acquiring learning data by superimposing noise data on clean voice data at an appropriate SN ratio, is provided. The learning data acquisition device includes a voice recognition influence degree calculation unit and a learning data acquisition unit. The voice recognition influence degree calculation unit calculates an influence degree on voice recognition accuracy caused by a change of a signal-to-noise ratio, based on a result of voice recognition on the kth noise superimposed voice data and a result of voice recognition on the k?1th noise superimposed voice data, where K is an integer of 2 or larger, k=2, 3, . . .Type: GrantFiled: January 29, 2020Date of Patent: March 26, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takaaki Fukutomi, Takashi Nakamura, Kiyoaki Matsui
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Publication number: 20240072507Abstract: The purpose of the present invention is to provide an optical fiber amplifier capable of seamlessly and collectively amplifying optical signals in a plurality of bands. In order to achieve the aforementioned purpose, the optical fiber amplifier according to the present invention is the optical fiber amplifier that amplifies multiple wavelength bands, and in cross-section, one signal light primary propagation region, and a doped region where rare-earth ions have been added, wherein the doped region includes the rare-earth-doped optical fiber existing other than the propagation region.Type: ApplicationFiled: January 21, 2021Publication date: February 29, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shinichi AOZASA, Taiji SAKAMOTO, Kazuhide NAKAJIMA, Takashi MATSUI
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Patent number: 11912940Abstract: A method of producing a coal mixture includes blending a plurality of coals, wherein formula (1) and formula (2) are satisfied: ? calc = ? i N ? ? i × x i ( 1 ) ?calc?1.2×10?10 (mol/g-coal)??(2) wherein ?calc is a hydrogen ion release capacity per unit mass (mol/g-coal) of the coal mixture, ?i is the hydrogen ion release capacity per unit mass (mol/g-coal) of a coal i, xi is a blending ratio of the coal i blended in the coal mixture, and N is a total number of brands of coal contained in the coal mixture.Type: GrantFiled: March 12, 2020Date of Patent: February 27, 2024Assignee: JFE Steel CorporationInventors: Yusuke Dohi, Takashi Matsui, Mikiya Nagayama
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Publication number: 20240061168Abstract: An object of the present invention is to achieve a low delay core applicable to a Master channel of a Master-Slave CPE (MS-CPE) transmission method with a general-purpose refractive index distribution structure. An optical fiber according to the present invention is a single-mode optical fiber, and has an SI-type refractive index distribution structure, in which a clad region relative refractive index difference ? (%) with respect to a core region refractive index, a radius a (?m) of the core region, and a group delay time difference ?? between the Master channel and the Slave channel satisfy “Mathematical Expression 19” and “Mathematical Expression 20”, or has a W-type refractive index distribution structure, in which a mode field diameter MFD is 9.5 to 10.Type: ApplicationFiled: January 5, 2021Publication date: February 22, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuto SAGAE, Takashi MATSUI, Kazuhide NAKAJIMA
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Patent number: 11906783Abstract: An object of the present invention is to provide a core position recognition method, a connection method, and a connection apparatus that can simplify connection operations, and reduce rotational displacement and positional displacement. The connection apparatus according to the present invention includes a function capable of acquiring the rotation amount of an MCF during the bonding/fixing step. Specifically, the connection apparatus of the present invention uses an MCF with lines drawn on a side surface thereof, thereby recognizing the rotation amount of the MCF from the side surface, and calculating the absolute positions of the cores. The connection apparatus according to the present invention can recognize the absolute position s of the cores from a side image of an MCF in a state in which the MCF has been rotated.Type: GrantFiled: October 8, 2019Date of Patent: February 20, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoko Yamashita, Masaki Wada, Takashi Matsui, Kazuhide Nakajima
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Patent number: 11899237Abstract: It is an object of the present invention to provide a multicore optical fiber, a design method for the multicore optical fiber and an optical transmission method using the multicore optical fiber including four cores having a standard cladding diameter of 125±1 ?m for an existing single mode optical fiber covering several thousands of kilometers of transmission. The multicore optical fiber according to the present invention disposes two-stage claddings with different refractive indices around each core, and designates as a predetermined range, a core radius a1, a radius a2 of a first cladding region surrounding each core, specific refractive index ?1 relative to the core of the first cladding region and a specific refractive index ?2 relative to the core of a second cladding region including four cores and the first cladding region.Type: GrantFiled: November 8, 2019Date of Patent: February 13, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Matsui, Kazuhide Nakajima
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Publication number: 20240027678Abstract: There are provided a multi-core optical fiber including four step-index type cores with a standard cladding diameter and having excellent mass productivity, quality, and yield while meeting desired specifications, and a design method thereof. A multi-core optical fiber according to the present disclosure includes: four cores arranged in a square lattice shape along a longitudinal direction, each of the four cores having a step-index type refractive index distribution with a radius a; and a cladding region having a lower refractive index than that of each core and a diameter of 125±1 ?m and provided on an outer peripheral portion of each core, where an absolute value of a relative refractive index difference between each core and the cladding region is ?.Type: ApplicationFiled: August 10, 2023Publication date: January 25, 2024Inventors: Takashi Matsui, Kazuhide Nakajima
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Publication number: 20240019323Abstract: An object of the present disclosure is to enable behavior of a linear structure in water to be estimated. The present disclosure is an apparatus that: expresses at least one parameter in a plurality of discrete values, and forecasts behavior of a linear structure by using each of the discrete values; acquires behavior of the linear structure detected using an optical fiber; calculates a likelihood between the forecasted behavior of the linear structure and the acquired behavior of the linear structure; updates at least one of the plurality of discrete values on the basis of the likelihood; and calculates behavior of the linear structure by using the updated plurality of discrete values.Type: ApplicationFiled: October 18, 2021Publication date: January 18, 2024Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, THE UNIVERSITY OF TOKYOInventors: Takashi MATSUI, Kazuhide NAKAJIMA, Nobutomo HANZAWA, Ryota WADA, Hideaki MURAYAMA
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Publication number: 20240007189Abstract: An object of the present invention is to provide an optical transmission system capable of satisfying XT required by a modulation system even if there is an inter-core loss difference in an MCF.Type: ApplicationFiled: August 21, 2020Publication date: January 4, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuto SAGAE, Kazuhide NAKAJIMA, Takashi MATSUI, Taiji SAKAMOTO, Ryota IMADA
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Publication number: 20230418173Abstract: A toner comprising a toner particle, the toner particle comprises a binder resin. The binder resin comprises an amorphous resin A and a crystalline resin C. T1, T2 and T3 satisfy specific relationships, where, in a viscoelasticity measurement of the toner, T1 (° C.) represents a temperature at which a storage elastic modulus G? is 3.0×107 Pa, T2 (° C.) represents temperature at which the storage elastic modulus G? is 1.0×107 Pa, and T3 (° C.) represents a temperature at which the storage elastic modulus G? is 3.0×106 Pa. A storage elastic modulus G? (100) at 100° C. is in a specific range. In an observation of a cross section of the toner, a matrix-domain structure having a matrix by the crystalline resin C and domains by the amorphous resin A is observed, an area ratio and a number-basis average surface area of the domains are in specific ranges.Type: ApplicationFiled: June 22, 2023Publication date: December 28, 2023Inventors: TAKASHI MATSUI, KENJI AOKI, YUHEI TERUI, MARIKO YAMASHITA
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Publication number: 20230418177Abstract: A toner comprising a toner particle, the toner particle comprising a binder resin, wherein T1, T2, T3, tan ?(T2), and tan ?(T2?10) satisfy expressions (1) to (4): T3?T1?10 ??(1) 50?T2?70 ??(2) 0.30?tan ?(T2)?1.00 ??(3) 1.00?tan ?(T2)/tan ?(T2?10)?1.90 ??(4). Where, in measurement of viscoelasticity of the toner, T1(° C.) represents a temperature at which a storage elastic modulus G? is 3.0×107 Pa, T2(° C.) represents a temperature at which the storage elastic modulus G? is 1.0×107 Pa, T3(° C.) represents a temperature at which the storage elastic modulus G? is 3.0×106 Pa, tan ?(T2) represents a ratio (tan ?) of a loss elastic modulus G? to the storage elastic modulus G? at the temperature T2(° C.), and tan ?(T2?10) represents the ratio (tan ?) at a temperature: T2?10(° C.).Type: ApplicationFiled: June 22, 2023Publication date: December 28, 2023Inventors: KENJI AOKI, MARIKO YAMASHITA, YUHEI TERUI, TAKASHI MATSUI
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Publication number: 20230418172Abstract: A nonmagnetic toner comprises a nonmagnetic toner particle. The nonmagnetic toner particle comprises a crystalline resin A, an amorphous resin B, and a colorant. The crystalline resin A has a monomer unit (a). the amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the nonmagnetic toner is 10.0 to 58.0 mass %. The sum of the contents of the crystalline resin A and the amorphous resin B in the nonmagnetic toner is 65.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm3)0.5] for a SP value of the crystalline resin A and using SPB [(J/cm3)0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15?SPB?SPA?2.00.Type: ApplicationFiled: June 22, 2023Publication date: December 28, 2023Inventors: SHINTARO NOJI, MARIKO YAMASHITA, KENJI AOKI, YUHEI TERUI, TAKASHI MATSUI
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Publication number: 20230418176Abstract: A magnetic toner comprising a toner particle, the toner particle comprising a magnetic body, a crystalline resin A, and an amorphous resin B. The crystalline resin A has a monomer unit (a). The amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the toner is 6.2 to 77.0 mass %. The sum of contents of the crystalline resin A and the amorphous resin B in the toner is 30.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm3)0.5] for a SP value of the crystalline resin A and using SPB [(J/cm3)0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15?SPB?SPA?2.00.Type: ApplicationFiled: June 22, 2023Publication date: December 28, 2023Inventors: MARIKO YAMASHITA, TAKASHI MATSUI, KENJI AOKI, YUHEI TERUI, SHINTARO NOJI
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Publication number: 20230408761Abstract: An object of the present disclosure is to alleviate deterioration of transmission characteristics of a fiber due to transmission of ultraviolet light, and to eliminate complication of operation due to frequent replacement of an optical fiber in which deterioration has occurred. The present disclosure is an ultraviolet light irradiation system including: an optical transmission unit that propagates ultraviolet light using a plurality of optical transmission lines; an ultraviolet light source unit that inputs ultraviolet light to each of the optical transmission lines with arbitrary power; and an irradiation unit that irradiates a target location with the ultraviolet light propagated through the plurality of optical transmission lines.Type: ApplicationFiled: October 22, 2020Publication date: December 21, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tomohiro TANIGUCHI, Ayako IWAKI, Kazuhide NAKAJIMA, Nobutomo HANZAWA, Takashi MATSUI, Yuto SAGAE, Chisato FUKAI