Patents by Inventor Takumi Fujiwara

Takumi Fujiwara 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).

  • Publication number: 20190340028
    Abstract: Provided is to appropriately allocate resources among the versions in the system, the resource setting control device includes: determination unit that extracts a load pattern of a service request in a specific period of time from a) a request history, including information of a group, the requested version, and a resource usage during execution of the service, and b) the request history in operation information storage, and updates the reference pattern when detecting that change from the reference pattern is beyond a specific range; and change unit that determines, for each of the versions, a resource request amount, based on a peak value of the resource usage in the specific period of time and a number of server devices providing the version, when detecting the load pattern change, and outputs the determined resource request amount.
    Type: Application
    Filed: January 9, 2018
    Publication date: November 7, 2019
    Applicant: NEC Corporation
    Inventor: Takumi FUJIWARA
  • Patent number: 10346202
    Abstract: A task circumstance processing system includes a processor that executes a process. The process includes: referencing a recognition information stored in a memory, the recognition information stores, for each of plural task processes in task definitions defining relationships between the plural task processes, recognition information for recognizing execution of each of the plural task processes, and extracting for each of the task processes a timing where the recognition information is expressed in observation data from observing circumstances of the task; and outputting a result of comparing a relationship between plural task processes that have been executed as identified by the extracted timings, against a relationship between plural task processes defined by the task definitions stored in the memory.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Masanao Fujii, Hiroyasu Fujiwara, Takumi Takeno, Takao Sekiya
  • Publication number: 20190052717
    Abstract: The present invention enables distribution of a message to a movable device, in publish/subscribe communications via a broker consisting of multiple stages. In an edge server, a message transmission and receiving unit receives, from a first broker, a message transmitted from a management device and directed to a device, or a message for which re-distribution was requested by another edge server and which is directed to the device. The message transmission and receiving unit transmits the received message to a second broker. When notified of a failure to distribute the message to the device, a request destination determination unit determines another edge server to serve as a re-distribution request destination. A re-distribution request unit transmits, to the first broker, the message directed to the device.
    Type: Application
    Filed: February 9, 2017
    Publication date: February 14, 2019
    Applicant: NEC Corporation
    Inventor: Takumi FUJIWARA
  • Publication number: 20160011928
    Abstract: Provided is a log output control device that dynamically controls the log output location in a program that is requested by a client using a log history output by the client, irregular operation information that is related to irregular operation of a program that is detected from the log, and log generation information that is related to log output processing that is inserted in a program executed by the client.
    Type: Application
    Filed: March 18, 2014
    Publication date: January 14, 2016
    Applicant: NEC Corporation
    Inventor: Takumi FUJIWARA
  • Patent number: 8984126
    Abstract: A service collaboration device 1 includes: a first determination unit 21 that determines whether or not the message triggers an inflow excess state based on a data amount of the message received from the collaboration source server and a data amount of the message transmitted to the collaboration target server; an augmentation instruction issuance unit 22 that, when the first determination unit 21 has determined that the inflow excess state is triggered, issues an augmentation instruction for augmenting a resource for the collaboration target server; a path change unit 32 that, when the augmentation instruction is issued, changes a path for transmitting the message to the collaboration target server to a path for transmitting the message to the collaboration target server after buffering the message; and a path addition unit 33 that adds a path for transmitting the buffered message to the resource augmented.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 17, 2015
    Assignee: NEC Corporation
    Inventor: Takumi Fujiwara
  • Patent number: 8926865
    Abstract: A glass emitting white light in itself, and a light-emitting element and a light-emitting device covered with the glass as stated above are provided. The white light-emitting glass is a glass emitting fluorescence at a region having a wavelength of 380 nm to 750 nm by excitation light with a wavelength of 240 nm to 405 nm, not containing crystal, and containing SnOx (where x=1 to 2, typically x=1 or 2), P2O5, and MnOy (where y=1 to 2, typically y=1 or 2). The light-emitting element and the light-emitting device are made up by covering a main surface of a semiconductor light-emitting element with the glass as stated above.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: January 6, 2015
    Assignees: Kyoto University, Asahi Glass Company, Limited
    Inventors: Hirokazu Masai, Toshinobu Yoko, Takumi Fujiwara, Syuji Matsumoto
  • Publication number: 20130241399
    Abstract: A glass emitting white light in itself, and a light-emitting element and a light-emitting device covered with the glass as stated above are provided. The white light-emitting glass is a glass emitting fluorescence at a region having a wavelength of 380 nm to 750 nm by excitation light with a wavelength of 240 nm to 405 nm, not containing crystal, and containing SnOx (where x=1 to 2, typically x=1 or 2), P2O5, and MnOy (where y=1 to 2, typically y=1 or 2). The light-emitting element and the light-emitting device are made up by covering a main surface of a semiconductor light-emitting element with the glass as stated above.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 19, 2013
    Applicants: Asahi Glass Company, Limited, Kyoto University
    Inventors: Hirokazu MASAI, Toshinobu Yoko, Takumi Fujiwara, Syuji Matsumoto
  • Publication number: 20130117440
    Abstract: A service collaboration device 1 includes: a first determination unit 21 that determines whether or not the message triggers an inflow excess state based on a data amount of the message received from the collaboration source server and a data amount of the message transmitted to the collaboration target server; an augmentation instruction issuance unit 22 that, when the first determination unit 21 has determined that the inflow excess state is triggered, issues an augmentation instruction for augmenting a resource for the collaboration target server; a path change unit 32 that, when the augmentation instruction is issued, changes a path for transmitting the message to the collaboration target server to a path for transmitting the message to the collaboration target server after buffering the message; and a path addition unit 33 that adds a path for transmitting the buffered message to the resource augmented.
    Type: Application
    Filed: September 14, 2012
    Publication date: May 9, 2013
    Applicant: NEC CORPORATION
    Inventor: Takumi FUJIWARA
  • Patent number: 8201421
    Abstract: To obtain an optical component having excellent secondary optical nonlinear properties by irradiating a surface and/or inside of glass having at least one member selected from Ni, Fe, V, Cu, Cr and Mn as a heat source material for absorbing and converting a laser beam to heat, incorporated to a glass matrix comprising at least one glass-forming oxide-selected from SiO2, GeO2, B2O3, P2O5, TeO2, Ga2O3, V2O5, MoO3 and WO3 and at least one member selected from alkali metals, alkaline earth metals, rare earth elements and transition elements, with a laser beam with a wavelength to be absorbed by the heat source material, to convert the irradiated portion to a single crystal or a group of crystal grains comprising components contained in the glass matrix and not containing the heat source material, thereby to form a pattern.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: June 19, 2012
    Assignees: Asahi Glass Company, Limited, Nagaoka University of Technology
    Inventors: Takayuki Komatsu, Tsuyoshi Honma, Takumi Fujiwara, Yasuhiko Benino
  • Publication number: 20080315123
    Abstract: To obtain an optical component having excellent secondary optical nonlinear properties by irradiating a surface and/or inside of glass having at least one member selected from Ni, Fe, V, Cu, Cr and Mn as a heat source material for absorbing and converting a laser beam to heat, incorporated to a glass matrix comprising at least one glass-forming oxide-selected from SiO2, GeO2, B2O3, P2O5, TeO2, Ga2O3, V2O5, MoO3 and WO3 and at least one member selected from alkali metals, alkaline earth metals, rare earth elements and transition elements, with a laser beam with a wavelength to be absorbed by the heat source material, to convert the irradiated portion to a single crystal or a group of crystal grains comprising components contained in the glass matrix and not containing the heat source material, thereby to form a pattern.
    Type: Application
    Filed: August 11, 2008
    Publication date: December 25, 2008
    Applicants: Aashi Glass Company, Limited, Nagaoka University of Technology
    Inventors: Takayuki Komatsu, Tsuyoshi Honma, Takumi Fujiwara, Yasuhiko Benino
  • Patent number: 6581414
    Abstract: Voltage is applied between electrodes (14a, 14b) under UV irradiation to perform a UV excitation poling, thereby producing microcrystal particles at a core unit (10a). Accordingly, second-order optical nonlinearity is developed at the core unit (10a) of an optical fiber (10). Under a high-temperature condition, a second-order optical nonlinearity can be imparted by a comparatively low-voltage UV excitation poling when a second-order optical nonlinearity decreases.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: June 24, 2003
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyota School Foundation
    Inventors: Takumi Fujiwara, Syuji Matsumoto, Akira Ikushima
  • Patent number: 6564585
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contains Ge, H and OH and has second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonlinear glass material comprising treating a porous glass material containing Ge with hydrogen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinear glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical functional elements or the like.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: May 20, 2003
    Assignees: Shin-Etsu Chemical Co., Ltd., Toyota Technological Institute
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara
  • Patent number: 6466722
    Abstract: A Ge-added SiO2 thin film (12) is formed on a glass substrate (10), and metal film (14) is formed thereon (S11 to S13). By etching the metal film (14), a pair of electrodes (14a, 14b) mutually opposed at a predetermined interval is formed(S14). An insulating thin film (16) is formed on the insulating film (12) and the electrodes (14a, 14b) (S15). While applying ultraviolet radiation, a high voltage is applied between the electrodes (14a, 14b) to perform ultraviolet excitement polling to impart an optical nonlinearity to a channel region (18)(S16). By controlling the voltage application to the channel region (18) having the optical nonlinearity, the light transmitted through the channel region (18) is controlled. Thus, an optical nonlinear waveguide for propagating single mode light is formed on a glass substrate.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: October 15, 2002
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyota School Foundation
    Inventors: Takumi Fujiwara, Akira Ikushima, Osamu Komeda
  • Patent number: 6380109
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contain Ge, H and OH and second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonliner glass material comprising treating a porous class material containing Ge with hydrohen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinger glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical elements or the like.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: April 30, 2002
    Assignees: Shin-Etsu Chemical Co., Ltd., Toyota Tecnological Institute
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara
  • Patent number: 6374026
    Abstract: A metal film (12) is formed on the surface of a glass substrate (10) and etched to form a pair of electrodes (12a and 12b) which face each other with a certain gap therebetween (S11˜S13). The substrate (10) is doped with germanium, etc, by using the electrodes (12a and 12b) as a mask to form a core part (14, S14). Then a high voltage is applied between the electrodes while ultraviolet radiation is applied and the core part (14) is subjected to ultraviolet-driven boring to give the optical nonlinearity to the core part (14, S15). The voltage application to the core part (14) having the optical nonlinearity is controlled to control a light transmitting through the core part (14).
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: April 16, 2002
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyota School Foundation
    Inventors: Takumi Fujiwara, Akira Ikushima
  • Publication number: 20010054300
    Abstract: Voltage is applied between electrodes (14a, 14b) under UV irradiation to perform a UV excitation poling, thereby producing microcrystal particles at a core unit (10a). Accordingly, second-order optical nonlinearity is developed at the core unit (10a) of an optical fiber (10). Under a high-temperature condition, a second-order optical nonlinearity can be imparted by a comparatively low-voltage UV excitation poling when a second-order optical nonlinearity decreases.
    Type: Application
    Filed: August 15, 2001
    Publication date: December 27, 2001
    Inventors: Takumi Fujiwara, Syuji Matsumoto, Akira Ikushima
  • Publication number: 20010019991
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contains Ge, H and OH and has second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonlinear glass material comprising treating a porous glass material containing Ge with hydrogen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinear glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical functional elements or the like.
    Type: Application
    Filed: May 9, 2001
    Publication date: September 6, 2001
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara
  • Patent number: 6246815
    Abstract: A core section (10a) is formed in an optical fiber (10) made of a glass material and, electrodes (14a and 14b) are inserted into the clad section (10b) of the fiber (10). When the core section (10a) is irradiated with ultraviolet rays in prescribed intensity patterns while a high voltage is applied to the electrodes (14a and 14b), a grating section (16) in which non linear areas (16a) and normal areas (16b) are alternately formed is formed in the section (10a). The characteristics of the grating section (16) can be changed by utilizing an electrooptic effect by impressing a prescribed electric field upon the section (16) through the electrodes (14a and 14b). A grating element constituted in such a way can be utilized as an optical functional element, such as the wavelength switch, because the Bragg wavelength of the element changes when a voltage is applied.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: June 12, 2001
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyota School Foundation
    Inventors: Takumi Fujiwara, Akira Ikushima
  • Patent number: 5966233
    Abstract: A method of inducing or enhancing the electro-optic properties of an optically transmissive material such as an optical fiber (1) which comprises applying an electric field by means of electrodes (4) to the optical fiber and subjecting the material to UV radiation (9).
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: October 12, 1999
    Assignee: University of Sydney
    Inventors: Takumi Fujiwara, Danny Wong, Simon Fleming, Yuxing Zhao, Mark Sceats, Simon Poole, Graham Town
  • Patent number: 5115512
    Abstract: The optical waveguide device comprises an optical waveguide formed as a region having a high index of refraction on a surface or in an interior including the surface of a base plate made of a ferroelectric crystal, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal phase plate and having electrical conductance higher than that of the optical waveguide. The optical waveguide is formed by thermal diffusion or a chemical reaction. This optical waveguide device is affected little by the optical damage and can be manufactured easily.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: May 19, 1992
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takumi Fujiwara, Hiroshi Mori, Takemi Kawazoe