Patents by Inventor Kazuki Ihara

Kazuki Ihara 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: 11479469
    Abstract: Provided is a method for stably storing a nanocarbon dispersion liquid comprising a surfactant for a long period of time. One aspect of the present invention relates to a method for storing a nanocarbon dispersion liquid comprising a low-temperature storage step of storing the nanocarbon dispersion liquid at 10° C. or lower and/or a surfactant concentration adjustment step of adjusting a concentration of the surfactant in the nanocarbon dispersion liquid so as to be less than 100 times of a critical micelle concentration and equal to or more than the critical micelle concentration.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: October 25, 2022
    Assignee: NEC CORPORATION
    Inventor: Kazuki Ihara
  • Patent number: 11440025
    Abstract: A nanocarbon separation device includes a separation tank that is configured to accommodate a dispersion liquid including nanocarbons, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, an evaluation unit that is configured to evaluate a physical state or a chemical state of the dispersion liquid, and a fractionation unit that is configured to fractionate the dispersion liquid based on the physical state or the chemical state.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: September 13, 2022
    Assignee: NEC CORPORATION
    Inventor: Kazuki Ihara
  • Publication number: 20220260609
    Abstract: A determination device includes: a sensor data reception unit that receives sensor data including acceleration in a travel direction of a user and in a gravity direction; a walking state discrimination unit that switches to a discrimination mode in response to the acceleration in the gravity direction exceeding a first threshold in a power saving mode, and switches to a walk measurement mode in response to the acceleration in the travel direction exceeding a second threshold in the discrimination mode; a change trend detection unit that detects a change trend of peak values using log data of the peak values of the acceleration in the travel direction in the discrimination mode; a threshold change unit that changes the second threshold based on a detection result by the change trend detection unit; and a transmission unit that transmits the sensor data in the walk measurement mode.
    Type: Application
    Filed: May 15, 2019
    Publication date: August 18, 2022
    Applicant: NEC Corporation
    Inventors: Chenhui HUANG, Kazuki IHARA, Noriyuki TONOUCHI, Kenichiro FUKUSHI
  • Publication number: 20220249028
    Abstract: Accurate, low cost detection of biological signals can be achieved by a biological signal estimation device provided with: a first measurement unit for measuring a first signal generated in a living body; a second measurement unit for measuring a second signal generated in the living body; a comparison unit for comparing characteristics of the first signal and the second signal; and an estimation unit for estimating a biological signal in the living body by performing signal processing on the first signal and the second signal on the basis of the result of comparison of the characteristics by the comparison unit.
    Type: Application
    Filed: July 16, 2019
    Publication date: August 11, 2022
    Applicant: NEC Corporation
    Inventor: Kazuki IHARA
  • Publication number: 20220225918
    Abstract: Provided is an information processing device including an acquisition unit configured to acquire motion information of a foot of a user measured by a motion measurement device and a determination unit configured to determine whether or not the user is in a pedaling state in which the user pedals a bicycle based on an angle between a sole and a ground generated from the motion information.
    Type: Application
    Filed: June 12, 2019
    Publication date: July 21, 2022
    Applicant: NEC Corporation
    Inventors: Chenhui HUANG, Kazuki IHARA, Noriyuki TONOUCHI, Kenichiro FUKUSHI
  • Patent number: 11383983
    Abstract: A nanocarbon separation device of the present invention includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a porous structure that is provided between the first electrode and the second electrode in the separation tank.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: July 12, 2022
    Assignee: NEC CORPORATION
    Inventor: Kazuki Ihara
  • Patent number: 11383984
    Abstract: A nanocarbon separation device includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a partition member that is provided between the first electrode and the second electrode in the separation tank, and the partition member partitions the separation tank into a plurality of regions.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: July 12, 2022
    Assignee: NEC CORPORATION
    Inventors: Kazuki Ihara, Mayumi Kosaka, Ryota Yuge, Hideaki Numata, Fumiyuki Nihey
  • Publication number: 20220211297
    Abstract: Provided is an information processing device including an acquisition unit configured to acquire motion information of a foot of a user measured by a motion measurement device provided on the foot and a feature amount extracting unit configured to extract a feature amount indicating a walking environment from an angle between a sole and a ground generated based on the motion information.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 7, 2022
    Applicant: NEC Corporation
    Inventors: Chenhui HUANG, Kenichiro FUKUSHI, Kazuki IHARA, Noriyuki TONOUCHI
  • Publication number: 20220183588
    Abstract: In order to easily and accurately determine a walk cycle, this walk cycle determination system is provided with: a reception unit for receiving sensor data including acceleration and angular velocity acquired by a sensor mounted to footwear; a detection unit which generates time-series data of the orientation angle of at least one foot using the acceleration and angular velocity included in the sensor data, and detects maximal values and minimal values from the time-series data of the orientation angle; and a determination unit for determining the walk cycle based on the sequence of the maximal values and the minimal values.
    Type: Application
    Filed: April 5, 2019
    Publication date: June 16, 2022
    Applicant: NEC Corporation
    Inventors: Kenichiro FUKUSHI, Chenhui HUANG, Noriyuki TONOUCHI, Kazuki IHARA
  • Publication number: 20220175273
    Abstract: Provided is an information processing device including an action information acquisition unit configured to acquire action information of a user, a pedaling period extracting unit configured to extract a plurality of pedaling periods during which the user pedals a bicycle from the action information, and a calculation unit configured to calculate a non-pedaling time during which the user is on the bicycle and does not pedal based on a start time of each of the plurality of pedaling periods and an end time of each of the plurality of pedaling periods.
    Type: Application
    Filed: June 12, 2019
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventors: Chenhui HUANG, Kazuki IHARA, Noriyuki TONOUCHI, Kenichiro FUKUSHI
  • Publication number: 20220181016
    Abstract: A discrimination device includes: a log acquisition unit that acquires sensor data including acceleration acquired by a sensor placed in a shoe, a storage unit that stores log data of the sensor data, a log calling unit that calls the log data stored in the storage unit, a discrimination unit that distinguishes a walking state from a waveform of the log data, a threshold setting unit that retains a first threshold and a second threshold, and sets the first threshold and the second threshold based on a discrimination result, and a transmission unit that transmits the discrimination result. When acceleration in the log data has not exceeded the second threshold within a discrimination time, the discrimination device outputs a discrimination result of being erroneous activation, and updates the first threshold based on a value of the acceleration in the traveling direction in the log data according to the discrimination result.
    Type: Application
    Filed: April 1, 2019
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventors: Chenhui HUANG, Kazuki IHARA, Noriyuki TONOUCHI, Kenichiro FUKUSHI
  • Publication number: 20220146280
    Abstract: This walk discrimination device is provided with: a data reception unit for receiving sensor data that includes an acceleration and an angular speed acquired by a sensor provided to a shoe in order to measure the walk of a pedestrian for each single step on the basis of the sensor data; an acceleration determination unit for determining whether the acceleration included in the sensor data is positive or negative; an attitude angle calculation unit which calculates an attitude angle using the acceleration and the angular speed included in the sensor data; an attitude angle determination unit which determines whether or not the attitude angle calculated by the attitude angle calculation unit has exceeded a threshold value and determines whether or not a peak of the attitude angle has been detected; a walk discrimination unit which discriminates a walk on the basis of a sequence of the determinations made by the acceleration determination unit and the attitude angle determination unit; and an output unit which o
    Type: Application
    Filed: March 27, 2019
    Publication date: May 12, 2022
    Applicant: NEC CORPORATION
    Inventors: Noriyuki TONOUCHI, Kazuki IHARA, Chenhui HUANG, Kenichiro FUKUSH
  • Publication number: 20220102735
    Abstract: A nanocarbon material aggregate excellent as a catalyst in an electrochemical reaction can be provided. The present invention relates to a nanocarbon material aggregate, comprising: a fibrous carbon nanohorn aggregate constituted by a plurality of carbon nanohorns including a carbon nanohorn having a hole-opening; and a first particle encapsulated in the carbon nanohorn having a hole-opening and partially exposed to the outside from the carbon nanohorn.
    Type: Application
    Filed: January 27, 2020
    Publication date: March 31, 2022
    Applicant: NEC Corporation
    Inventors: Kazuki IHARA, Takashi MANAKO, Ryota YUGE
  • Publication number: 20210087061
    Abstract: Provided is a method for stably storing a nanocarbon dispersion liquid comprising a surfactant for a long period of time. One aspect of the present invention relates to a method for storing a nanocarbon dispersion liquid comprising a low-temperature storage step of storing the nanocarbon dispersion liquid at 10° C. or lower and/or a surfactant concentration adjustment step of adjusting a concentration of the surfactant in the nanocarbon dispersion liquid so as to be less than 100 times of a critical micelle concentration and equal to or more than the critical micelle concentration.
    Type: Application
    Filed: March 23, 2018
    Publication date: March 25, 2021
    Applicant: NEC CORPORATION
    Inventor: Kazuki IHARA
  • Publication number: 20200346223
    Abstract: A nanocarbon separation device includes a separation tank that is configured to accommodate a dispersion liquid including nanocarbons, a first electrode provided at an upper part in the separation tank, a second electrode provided at a lower part in the separation tank, an evaluation unit that is configured to evaluate a physical state or a chemical state of the dispersion liquid, and a determination unit that is configured to determine a separation state between metallic nanocarbons and semiconducting nanocarbons included in the dispersion liquid from the physical state or the chemical state.
    Type: Application
    Filed: October 26, 2017
    Publication date: November 5, 2020
    Applicant: NEC CORPORATION
    Inventor: Kazuki IHARA
  • Publication number: 20200338570
    Abstract: A nanocarbon separation device includes a separation tank that is configured to accommodate a dispersion liquid including nanocarbons, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, an evaluation unit that is configured to evaluate a physical state or a chemical state of the dispersion liquid, and a fractionation unit that is configured to fractionate the dispersion liquid based on the physical state or the chemical state.
    Type: Application
    Filed: October 26, 2017
    Publication date: October 29, 2020
    Applicant: NEC Corporation
    Inventor: Kazuki IHARA
  • Publication number: 20200325023
    Abstract: A nanocarbon separation device of the present invention includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a porous structure that is provided between the first electrode and the second electrode in the separation tank.
    Type: Application
    Filed: October 10, 2017
    Publication date: October 15, 2020
    Applicant: NEC CORPORATION
    Inventor: Kazuki IHARA
  • Publication number: 20200283296
    Abstract: A nanocarbon separation device includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a partition member that is provided between the first electrode and the second electrode in the separation tank, and the partition member partitions the separation tank into a plurality of regions.
    Type: Application
    Filed: October 10, 2017
    Publication date: September 10, 2020
    Applicant: NEC CORPORATION
    Inventors: Kazuki IHARA, Mayumi KOSAKA, Ryota YUGE, Hideaki NUMATA, Fumiyuki NIHEY
  • Publication number: 20200282360
    Abstract: A nanocarbon separation device includes a porous structure configured to hold a dispersion liquid containing nanocarbons, a first electrode disposed to come into contact with at least a part of an upper end of the porous structure, and a second electrode disposed to come into contact with at least a part of a lower end of the porous structure.
    Type: Application
    Filed: October 3, 2018
    Publication date: September 10, 2020
    Applicant: NEC CORPORATION
    Inventor: Kazuki IHARA
  • Publication number: 20200223695
    Abstract: A method for separating a single-walled carbon nanotube mixture includes: preparing a dispersion liquid containing the single-walled carbon nanotube mixture and a surfactant; and separating the single-walled carbon nanotube mixture contained in the dispersion liquid, wherein in the separating the single-walled carbon nanotube mixture, a dispersion liquid in which a physical property of the dispersion liquid is within a prescribed range is used.
    Type: Application
    Filed: September 29, 2017
    Publication date: July 16, 2020
    Applicant: NEC CORPORATION
    Inventors: Kazuki IHARA, Hideaki NUMATA