Patents by Inventor Akira Yamada

Akira Yamada 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).

  • Patent number: 8923752
    Abstract: A relay station includes a signal generation unit configured to generate a signal in the relay station and a receiving unit configured to receive a signal from a first communication station. The relay station further includes a signal generating node identifying unit configured to identify whether a signal to be transmitted to a second communication station is a received signal received from the first communication station or a generated signal generated by the signal generation unit. The relay station further includes a signal transmission unit configured to transmit both or one of the received signal and the generated signal associated with a radio bearer to the second communication station.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: December 30, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yasufumi Morioka, Akira Yamada, Hideaki Takahashi, Mikio Iwamura, Junichiro Hagiwara
  • Patent number: 8874100
    Abstract: A mobile communication method according to the present invention includes a step in which, when a relay node RN, which is subordinate to a radio base station DeNB and is in an “RRC_CONNECTED state”, received an “RRC connection release message” from the radio base station DeNB, the relay node RN is transitioned to an “RRC_IDLE state” after transmitting an “RRC connection release message” to a mobile station UE, which is subordinate to the relay node RN and is in the “RRC_CONNECTED state”, and a predetermined time T2 elapses.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 28, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yasufumi Morioka, Hideaki Takahashi, Yukihiko Okumura, Mikio Iwamura, Akira Yamada
  • Patent number: 8855043
    Abstract: A relay node of a communication system includes a communication unit that initiates a session by executing an initial connection procedure for retrieving a cell list indicating one or more donor base station candidates from a maintenance node after establishment of an initial communication link among the relay node, a base station, and a switching center, and for establishing a communication link to a donor base station in the cell list and a switching center connected to the donor base station; a storing unit that stores the cell list; and a reconnection control unit that selects, when a radio link with the donor base station is lost, a donor base station satisfying a predetermined criterion in the cell list, and that causes the communication unit to establish a communication link to the selected donor base station and a switching center connected to the selected donor base station.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: October 7, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yasufumi Morioka, Akira Yamada, Hideaki Takahashi, Mikio Iwamura, Junichiro Hagiwara
  • Patent number: 8854033
    Abstract: A semiconductor device having a lateral semiconductor element includes a semiconductor substrate, a first electrode on the substrate, a second electrode on the substrate, and an isolation structure located in the substrate to divide the substrate into a first island and a second island electrically insulated from the first island. The lateral semiconductor element includes a main cell located in the first island and a sense cell located in the second island. The main cell causes a first current to flow between the first electrode and the second electrode so that the first current flows in a lateral direction along the surface of the substrate. The first current is detected by detecting a second current flowing though the sense cell.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: October 7, 2014
    Assignee: DENSO CORPORATION
    Inventors: Satoshi Shiraki, Norihito Tokura, Shigeki Takahashi, Masahiro Yamamoto, Akira Yamada, Hiroyasu Kudo, Youichi Ashida, Akio Nakagawa
  • Patent number: 8843219
    Abstract: An RTC, having a crystal oscillator of different characteristics from those of a crystal oscillator, is provided, and the pulse period of the pulse signal from the RTC and the pulse signal based on the crystal oscillator are compared to detect a fault in the crystal oscillator. As a result, even if, for example, located in a high temperature environment, the degrees to the decrease in frequency will be different, thus making it possible to detect reliably a fault in the crystal oscillator.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: September 23, 2014
    Assignee: Azbil Corporation
    Inventors: Akira Yamada, Yuuichi Kumazawa, Tomoya Nakata, Katsumi Morikawa
  • Publication number: 20140263187
    Abstract: A gas-insulated device for electrical power is disclosed that includes: a fixed contact unit and a movable contact unit which are disposed to face with each other in an airtight container filled with a carbon dioxide gas or a gas mixture including a carbon dioxide gas, serving as an arc extinguishing gas. The fixed contact unit includes a fixed arc contact, a fixed conduction contact disposed outside the fixed arc contact, and a conductive supporting member for electrically connecting between the fixed arc contact and the fixed conduction contact and supporting these contacts.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 18, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akira Yamada, Hisao Oomura, Hirofumi Okabe, Kei Kawasaki, Amane Majima
  • Patent number: 8815078
    Abstract: Disclosed are a pH or concentration measuring device and a pH or concentration measuring method which enable measurement in the shortest possible time even in an object to be measured having low buffer capacity.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: August 26, 2014
    Assignee: National University Corporation Okayama University
    Inventors: Akira Yamada, Michihiro Nakamura, Satoshi Mohri, Keiji Naruse
  • Publication number: 20140232781
    Abstract: A recording apparatus including a recording head that discharges UV ink onto a recording material and an ultraviolet light irradiation unit that irradiates ultraviolet light to the discharged UV ink so as to harden the UV ink; further includes a failure diagnostic unit that diagnoses a failure condition of the ultraviolet light irradiation unit and a controller that controls operations of the recording head, the ultraviolet light irradiation unit, and the failure diagnostic unit. Further, the controller is so configured as to change the operation mode of the recording apparatus to a failure-state mode when the ultraviolet light irradiation unit has been diagnosed as a failure by the failure diagnostic unit.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akira YAMADA, Shinichi KAMOSHIDA
  • Publication number: 20140209174
    Abstract: A method for producing a nanoparticle for forming a CZTS compound semiconductor thin film is provided which includes the step of reacting a solution including a metal salt or a metal complex with a solution including a chalcogenide salt to produce a CZTS compound nanoparticle. A CZTS compound semiconductor thin film is formed by coating or printing the nanoparticle for forming the CZTS compound semiconductor thin film, and subjecting it to a heat treatment. A solar cell including the CZTS compound semiconductor thin film as the light-absorbing layer is provided.
    Type: Application
    Filed: March 28, 2014
    Publication date: July 31, 2014
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, TOPPAN PRINTING CO.,LTD.
    Inventors: Yiwen ZHANG, Akira YAMADA
  • Patent number: 8791690
    Abstract: A semiconductor device having a lateral semiconductor element includes a semiconductor substrate, a first electrode on the substrate, a second electrode on the substrate, and an isolation structure located in the substrate to divide the substrate into a first island and a second island electrically insulated from the first island. The lateral semiconductor element includes a main cell located in the first island and a sense cell located in the second island. The main cell causes a first current to flow between the first electrode and the second electrode so that the first current flows in a lateral direction along the surface of the substrate. The first current is detected by detecting a second current flowing though the sense cell.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: July 29, 2014
    Assignee: DENSO CORPORATION
    Inventors: Satoshi Shiraki, Norihito Tokura, Shigeki Takahashi, Masahiro Yamamoto, Akira Yamada, Hiroyasu Kudo, Youichi Ashida, Akio Nakagawa
  • Patent number: 8792413
    Abstract: A relay station for relaying a radio signal between a mobile station and a base station includes a relay station information generating unit configured to generate relay station information used by the base station to select a switching center to be connected to the relay station. The relay station also includes a message generating unit configured to generate a message including the relay station information generated by the relay station information generating unit, and a transmitting unit configured to transmit the message generated by the message generating unit to the base station.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: July 29, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yasufumi Morioka, Akira Yamada, Hideaki Takahashi, Mikio Iwamura, Junichiro Hagiwara
  • Patent number: 8783818
    Abstract: A recording apparatus including a recording head that discharges UV ink onto a recording material and an ultraviolet light irradiation unit that irradiates ultraviolet light to the discharged UV ink so as to harden the UV ink; further includes a failure diagnostic unit that diagnoses a failure condition of the ultraviolet light irradiation unit and a controller that controls operations of the recording head, the ultraviolet light irradiation unit, and the failure diagnostic unit. Further, the controller is so configured as to change the operation mode of the recording apparatus to a failure-state mode when the ultraviolet light irradiation unit has been diagnosed as a failure by the failure diagnostic unit.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: July 22, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Akira Yamada, Shinichi Kamoshida
  • Publication number: 20140082730
    Abstract: An apparatus and method predict and detect network attacks by using a diverse set of indicators to measure aspects of the traffic and by encoding traffic characteristics using these indicators of potential attacks or anomalous behavior. The set of indicators is analyzed by supervised learning to automatically learn a decision rule which examines the temporal patterns in the coded values of the set of indicators to accurately detect and predict network attacks. The rules automatically evolve in response to new attacks as the system updates its rules periodically by analyzing new data and feedback signals about attacks associated with that data. To assist human operators, the system also provides human interpretable explanations of detection and prediction rules by pointing to indicators whose values contribute to a decision that there is an existing network attack or an imminent network attack. When such indictors are detected, an operator can take remediation actions.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Akshay VASHIST, Ritu CHADHA, Abhrajit GHOSH, Alexander POYLISHER, Yukiko SAWAYA, Akira YAMADA, Ayumu KUBOTA
  • Publication number: 20140068928
    Abstract: A inverting head 20 that inverts a component 4 picked up by a nozzle 20a upside down includes a flat-plate-like base 31 provided on a vertically-movable transfer base 21d; a nozzle holder support member 33 that is swayable within a horizontal plane the base as a result of arcuate peripheries 41 being supported by a plurality of bearings 32 provided on the base 31; and a nozzle holder 34 that is supported so as to be turnable around a horizontal axis CX by the nozzle holder support member 33 and that holds on its side surface the nozzle 20a.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Syozo Kadota, Akira Yamada
  • Publication number: 20140048911
    Abstract: A lateral semiconductor device includes a semiconductor layer, an insulating layer, and a resistive field plate. The semiconductor layer includes a first semiconductor region and a second semiconductor region at a surface portion, and the second semiconductor region makes a circuit around the first semiconductor region. The insulating layer is formed on a surface of the semiconductor layer and is disposed between the first and second semiconductor regions. The resistive field plate is formed on a surface of the insulating layer. Between the first and second semiconductor regions, a first section and a second section are adjacent to each other along a circumferential direction around the first semiconductor region. The resistive field plate includes first and second resistive field plate sections respectively formed in the first and second sections, and the first and second resistive field plate sections are separated from each other.
    Type: Application
    Filed: May 10, 2012
    Publication date: February 20, 2014
    Applicant: DENSO CORPORATION
    Inventors: Takashi Suzuki, Norihito Tokura, Satoshi Shiraki, Shigeki Takahashi, Youichi Ashida, Akira Yamada
  • Publication number: 20140020099
    Abstract: An inventive system and method for creating source profiles to detect spoofed traffic comprises obtaining a routing path for data to traverse nodes using traffic profiles, each routing path comprising at least a target AS, initializing one or more AS sets with last hop ASes, enhancing the AS sets by connecting the AS sets to routers, for each enhanced AS set, filtering observed traffic flows, and using the filtered flows to associate enhanced AS sets with network monitoring points to create the source profiles. In one aspect, filtering flows comprise TCP session filtering and/or destination bogon filtering. In one aspect, the routers are border gateway protocol routers. In one aspect, the last hop ASes are one hop away from the target AS.
    Type: Application
    Filed: July 12, 2012
    Publication date: January 16, 2014
    Applicants: KDDI Corporation, Telcordia Technologies, Inc.
    Inventors: Ravichander Vaidyanathan, Abhrajit Ghosh, Akira Yamada, Yukiko Sawaya, Ayumu Kubota
  • Publication number: 20130340079
    Abstract: A system and a method for detecting anomalous attacks in Internet network flow operate by counting a number of Internet traffic messages that are detected as anomalous attacks to provide a count; computing a running average of the number of messages that are detected as anomalous attacks; and comparing the count to the running average to provide an anomalous attack alarm if the count is greater than a multiple of the running average. The attacks can include at least one of spoofing attacks or denial of service attacks. A computer readable storage medium stores instructions of a computer program, which when executed by a computer system, results in performance of steps of the method.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 19, 2013
    Inventors: Yitzchak GOTTLIEB, Aditya NAIDU, Abhrajit GHOSH, Akira YAMADA, Yukiko SAWAYA, Ayumu KUBOTA
  • Patent number: 8598707
    Abstract: A solder alloy includes 5 to 15% by mass of Sb, 3 to 8% by mass of Cu, 0.01 to 0.15% by mass of Ni, and 0.5 to 5% by mass of In. The remainder thereof includes Sn and unavoidable impurities. Thereby, highly reliable solder alloy and semiconductor device suppressing a fracture in a semiconductor element and improving crack resistance of a solder material can be obtained.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: December 3, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Maeda, Kenji Otsu, Akira Yamada
  • Publication number: 20130284270
    Abstract: A compound semiconductor thin film solar cell is provided, which includes a light-absorbing layer made of a compound semiconductor and a buffer layer formed on the light-absorbing layer. The buffer layer is formed with use of an ink containing nanoparticles each containing at least a metal element and an element of Group 16.
    Type: Application
    Filed: June 25, 2013
    Publication date: October 31, 2013
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Yiwen ZHANG, Akira Yamada
  • Publication number: 20130269179
    Abstract: A nozzle holder 34 includes a nozzle base 51 whose both ends are supported, the nozzle base 51 inside which a vacuum path is formed, extending in a horizontal direction, a nozzle locking member 53 for communicating a nozzle 20a to the vacuum path (vacuum path 72 of the inside of the nozzle base) of the inside of the nozzle base 51, and a pair of fixing members 54 for fixing the nozzle locking member 53 to the nozzle base 51.
    Type: Application
    Filed: September 11, 2012
    Publication date: October 17, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Syozo Kadota, Akira Yamada