About Me

Yoshitomo Matsubara

Ph.D. candidate
Department of Computer Science
Donald Bren School of Information & Computer Sciences
University of California, Irvine
Latest News

Mar 25, 2020
This quarter, I am working as a graduate student researcher.
Mar 6, 2020
We, UCI Table Tennis Club Varsity team, are invited to the 2020 iSET College Table Tennis National Championships.
Feb 29, 2020
We, UCI Table Tennis Club Varsity team, placed 4th in NCTTA West Regional Championships.
Feb 1, 2020
We, UCI Table Tennis Club Varsity team, won the Socal East Division.
January 2, 2020
This quarter, I am working as a graduate student researcher.
October 21, 2019
I presented our work at MobiCom 2019 Workshop on Hot Topics in Video Analytics and Intelligent Edges.
September 23, 2019
This quarter, I am working as a graduate student researcher.
September 23, 2019
In 2019-2020 season, I serve as a vice president of UCI Table Tennis Club.
September 23, 2019
Our papper was accepted to MobiCom 2019 Workshop on Hot Topics in Video Analytics and Intelligent Edges.
September 17, 2019
I was invited to talk at Robot Learning Group in Osaka University, Japan.
June 24, 2019
This quarter, I am working for Amazon.com Services, Inc. as an applied scientist intern.
June 13, 2019
I passed my Ph.D. qualifying exam, and successfully advanced to candidacy.
June 5, 2019
Our team, Zotbot, was selected as a finalist (10 of 375 teams) for the Alexa Prize Socialbot Grand Challenge 3.
May 23, 2019
We, UCI Table Tennis Club Varsity team, was featured on UCI News "UCI table tennis team competes for first time in national championships, takes fourth place".
Apr 14, 2019
We, UCI Table Tennis Club Varsity team, placed 4th in iSET College Table Tennis National Championships.
Mar 27, 2019
This quarter, I am assisting CS 273P: "Machine Learning & Data Mining".
Mar 27, 2019
We, UCI Table Tennis Club Varsity team, are featured on NCTTA, "College Teams Embrace First Trip to Table Tennis National Championships".
Mar 9, 2019
We, UCI Table Tennis Club Varsity team, won the NCTTA West Regional Championships, and advanced to the 2019 iSET College Table Tennis National Championships.
Feb 9, 2019
We, UCI Table Tennis Club Varsity team, won the Socal East Division.
Jan 7, 2019
This quarter, I am assisting CS 272: "Statistical NLP".
Nov 17, 2018
We, UCI Table Tennis Club varsity team, won the Socal East & West Division.
Sep 24, 2018
This quarter, I am assisting CS 273A: "Machine Learning".
June 25, 2018
This quarter, I am working for Slice Technologies, Inc. as a machine learning engineeering intern.
April 3, 2018
This quarter, I am assisting BANA 290: "Advanced Data Analytics for Natural Language Processing".
January 3, 2018
This quarter, I am assisting CS 273A: "Machine Learning".
September 28, 2017
This quarter, I am assisting ICS 32A: "Python Programming with Libraries (Accelerated)".
July 20, 2017
I was invited to speak on "Seminar of Study Abroad for Pursuing a Degree" at Global Terrace, National Institute of Technology, Akashi College.
June 26, 2017
I started to work for Data & Science Solutions Group, Yahoo Japan Corporation as a data scientist (contract employee).
April 3, 2017
This quarter, I am assisting CS 122B: "Projects in Databases and Web Applications".
January 9, 2017
This quarter, I am assisting ICS 45C: "Programming in C/C++ as a Second Language".
September 22, 2016
This quarter, I am assisting ICS 45J: "Programming in Java as a Second Language".
September 19, 2016
Our paper on flick authentication was accepted to ICMLA 2016.
September 19, 2016
I enrolled in Donald Bren School of Information & Computer Sciences (Computer Science Ph.D. program) at the University of California, Irvine.
June 9, 2016
I was invited to speak on "Study Abroad to Pursue a Graduate Degree from "Zero" -Introduction and Preparation-" at Global Terrace, National Institute of Technology, Akashi College.
April 1, 2016
I joined the Information Science Research Center for Social Applications in the Graduate School of Applied Informatics at the University of Hyogo as a project researcher.
March 22, 2016
I graduated from Graduate School of Applied Informatics (High Confidence Informatics Course ) at the University of Hyogo and obtained a Master's degree in Applied Informatics.
January 25, 2016
I started to work for Data & Science Solutions Group, Yahoo Japan Corporation as a data scientist (contract employee).
November 30, 2015
I worked for Yahoo Japan Corporation as a special intern (data science).
November 12, 2015
I did a poster presentation at The Fifth Symposium on Biometrics, Recognition and Authentication(SBRA2015).
October 25, 2015
Our technical report was published in IEICE Technical Report.
July 14, 2015
Our paper on keystroke dynamics was published in Journal of Information Security.
June 12, 2015
I obtained the Grant Scholarship for Japanese Students from JGC-S Scholarship Foundation.
April 16, 2015
Our paper on keystroke dynamics was published in Journal of Information Security.
February 27, 2015
I worked for Recruit Holdings Co., Ltd. as a outsourced worker.
September 19, 2014
I took part in Recruit Holdings Summer Internship 2014 Web Innovation Course Data Analysis Internship, and won the victory in the team competition.
April 4, 2014
I enrolled in Graduate School of Applied Informatics (High Confidence Informatics Course ) at the University of Hyogo.
March 20, 2014
I graduated from Advanced Course of Mechanical and Electronic System Engineering, Akashi National College of Technology and obtained a Bachelor's degree in Engineering.
March 20, 2014
I received President's Award in INCT's Student Commendation from the Institute of National Colleges of Technology, Japan.
March 1, 2014
I opened my home page.
Projects
Alexa Prize SGD3
2019 - Present
Coming soon
2018 - Present
Coming soon
2016 - Present
Flick Authentication
2014 - 2016
Safe Driving Support
2013 - 2014
TESOL
2013 - 2014
Keystroke Dynamics
2010 - 2014
EDUCATION
  • University of California, Irvine [9/2016 - present]
    • Department of Computer Science
      Donald Bren School of Information & Computer Sciences
    • Ph.D. candidate in Computer Science
    • GPA: 3.92 / 4.00


  • University of Hyogo, Kobe, Japan [4/2014 - 3/2016]
    • Graduate School of Applied Informatics (High Confidence Informatics Course)
    • Master of Applied Informatics
    • GPA: 3.82 / 4.00


  • Akashi National College of Technology (ANCT), Akashi, Japan [4/2012 - 3/2014]
    (National Institute of Technology, Akashi College (4/2015 - present))
    • Advanced Course of Mechanical and Electronics System Engineering
    • Bachelor of Engineering
    • GPA: 3.875 / 4.00 (4/2012 - 3/2014, as calculated by myself, no official GPA reported)


  • Akashi National College of Technology (ANCT), Akashi, Japan [4/2007 - 3/2012]
    (National Institute of Technology, Akashi College (4/2015 - present))
    • Department of Electrical and Computer Engineering
    • Associate's Degree (Engineering)
    • GPA: 3.53 / 4.00 (4/2010 - 3/2012, as calculated by myself, no official GPA reported)

WORK EXPERIENCE
  • Internship
    • Full-time Summer Internship, Amazon.com Services, Inc. [6/2019 - 9/2019]
      • Applied Scientist Intern

      • Researched Web-based QA systems

    • Full-time Summer Internship, Slice Technologies, Inc. [6/2018 - 9/2018]
      • Machine Learning Engineering Intern

      • Researched machine learning model interpretability

    • Special Internship (Data Science), Yahoo Japan Corporation [8/2015 - 11/2015]
      • Analyzed user's web browsing behavior with Yahoo! Japan's big data and tested machine learning models built with the big data.

    • Recruit Holdings Summer Internship 2014 Web Innovation Course Data Analysis Internship, Recruit Holdings Co., Ltd. [9/2014]
      • Developed a new algorithm for similar nail image recommendation.

      • Won the victory in the data analysis competition and received BEST TEAM AWARD.

      • [Release] In February 2015, we improved a part of our system developed in the summer internship, and it was released on the Hot Pepper Beauty.
        (Press Release, SlideShare, ITmedia, IT Leaders, CNET Japan)

    • Asada Laboratory, Osaka University [3/2013]
      • Advisor: Assistant Prof. Hiroki Mori (Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University)

      • Developed an embryo's neck model with pneumatic actuators, experiencing CAD design and rapid prototyping with SolidWorks and a 3D printer.

    • Computer Vision & Machine Learning Lab, Hiroshima University [8/2012]
      • Advisor: Prof. Takio Kurita (Department of Information Engineering, Institute of Engineering(Undergraduate Course of Integrated Arts and Sciences), Hiroshima University)

      • Developed an image classifier using SVM and OpenCV.

    • Computer System Lab, University of Yamanashi [8/2010]
      • Advisor: Prof. Hidetoshi Mino (Department of Computer Science and Engineering, University of Yamanashi)

      • Developed AI for Reversi and experienced GPU programming.

    Part-time Technical Job
    • Data & Science Solutions Group, Yahoo Japan Corporation [1/2016 - 8/2016, 6/2017 - 9/2017]
    • Data Scientist (contract employee)
      • Analyzed user's web browsing behavior with Yahoo! Japan's big data and tested several machine learning models built with the big data.


TEACHING EXPERIENCE
  • Teaching Assistant
    • University of California, Irvine
      • CS 273P: "Machine Learning & Data Mining" [3/2019 - 6/2019]
      • CS 272: "Statistical NLP" [1/2019 - 3/2019]
      • CS 273A: "Machine Learning" [9/2018 - 12/2018]
      • BANA 290: "Advanced Data Analytics for Natural Language Processing" [4/2018 - 6/2018]
      • CS 273A: "Machine Learning" [1/2018 - 3/2018]
      • ICS 32A: "Python Programming with Libraries (Accelerated)" [9/2017 - 12/2017]
      • CS 122B: "Projects in Databases and Web Applications" [3/2017 - 6/2017]
      • ICS 45C: "Programming in C/C++ as a Second Language" [1/2017 - 3/2017]
      • ICS 45J: "Programming in Java as a Second Language" [9/2016 - 12/2016]

    • Graduate School of Applied Informatics, University of Hyogo
      • Teaching Assistant in "Data Mining" [10/2015 - 3/2016]

    • Department of Electrical and Computer Engineering, ANCT
      • "Experiments of Computer Engineering I" [4/2013 - 8/2013]
      • "Experiments of Electrical Engineering I" [4/2013 - 8/2013]
      • "Computer Programming I" [4/2013 - 5/2013]
      • Public Lecture of "3-D Computer Animation" [9/2009, 9/2010]

    • Department of Civil Engineering, ANCT
      • "Introduction of Computer Application" [4/2012 - 8/2012, 4/2013 - 1/2014]

  • Tutor for International Students
    • Graduate School of Applied Informatics, University of Hyogo
      • Supported four international students' school lives. [4/2015 - 3/2016]
      • Supported three international students' school lives. [4/2014 - 3/2015]

  • Cram School Teacher
    • Individual Support to Independent Study Gym (part-time) [2/2012 - 3/2014]
      • Taught all levels of students from elementary school to high school multiple subjects including Mathematics, Science, Social Studies, English, Japanese and the like.

ACTIVITIES
  • IEICE Technical Committee on Biometrics, Student Section [7/2013 - 3/2018]
    • Advertised events to encourage students to present their work.

  • Autumn Camp for RoboCup Simulation Leagues
    • Aichi Institute of Technology [11/2014]
      • Played practice games with my own team in RoboCup Soccer 2D Simulation League.

    • Osaka Prefecture University [11/2013]
      • Attended lectures about the RoboCup Soccer 2D/3D Simulation League and how to analyze log files of their game play.

  • Seminar of Visualization [9/2012]
    • Information System Lab, Toyohashi University of Technology
      • Advisor: Prof. Yoshiteru Ishida (Department of Knowledge-based Information Engineering, Toyohashi University of Technology)

      • Received visualization training with Graphviz and gnuplot.

  • Study Abroad at the University of California, Irvine [9/2011]
    • Stayed at Irvine with my host family for three weeks, studied about keystroke dynamics for English free text typing and trained my English ability at UCI ESL.

  • UCI Table Tennis Club
    • Vice president [9/2019 - present]
    • Club member [9/2016 - present]

  • ANCT Table Tennis Club
    • Contract coach [4/2014 - 6/2015]
    • Representative and coach [9/2008 - 8/2013]
    • Club member [4/2007 - 3/2014]

AWARDS AND FUNDINGS
  • 4th place in NCTTA West Regional Championships (Varsity team), February 2020
  • 1st place in NCTTA SoCal East Division, Winter (Varsity team), February 2020
  • UCI CS Travel Grants, Dec 2019
  • 4th place in iSET College Table Tennis National Championships (Varsity team), April 2019
  • 1st place in NCTTA West Regional Championships (Varsity team), March 2019
  • 1st place in NCTTA SoCal East Division, Winter (Varsity team), February 2019
  • 1st place in NCTTA SoCal East & West Division, Fall (Varsity team), November 2018
  • Graduate Fellowship from University of California, Irvine, September 2016 - present
  • Grant Scholarship for Japanese Students from JGC-S Scholarship Foundation (5/2015 to 3/2016), total for one year is about $3,000 (¥300,000)
  • 1st prize (BEST TEAM AWARD) in the team competition in Recruit Holdings Summer Internship 2014 Web Innovation Course Data Analysis Internship, September 2014
  • Japan Student Services Organization Scholarship (4/2014 to 3/2016), total for two years is about $21,000 (¥2,100,000)
  • President's Award in INCT's Student Commendation from the Institute of National Colleges of Technology, Japan, March 2014
  • Academic Excellence Award in JASSO's Student of the Year 2013 with a prize of about $3,000 (¥300,000) from the Japan Student Services Organization, December 2013
  • 2nd prize in the Presentation Section of The 2013 English Presentation Contest for Colleges of Technology in the Kinki District, November 2013
  • Academic Encouragement Award from the principal of ANCT, October 2013
  • Encouraging Award in Kansai-section Joint Convention of Institutes of Electrical Engineering, April 2013
  • 1st prize in the Speech Section of The 2012 English Presentation Contest for Colleges of Technology in the Kinki District, November 2012
  • Japan Student Services Organization Scholarship (4/2012 to 3/2014), total for two years is about $12,000 (¥1,200,000)
  • Award for Academic Excellence with an invitation to present at The IEEJ Technical College Graduate Study Presentation 2012, March 2012
  • Award of Excellent Extracurricular Activity from the principal of ANCT, February 2010
  • 5th prize in the Programming Category of PC-Concours 2009 in the national tournament, November 2009
  • 30 or more awards regarding Table Tennis since 2004

ARTICLES

SKILLS
  • Programming: Java (including Android and Swing) / Python / C / C++ / Perl / OpenCV / TeX
  • Web Programming: HTML / CSS / JavaScript / PHP / MySQL
  • Server Management, Hadoop and Oozie
  • Image Editing and CG Creating: GIMP / Inkscape / POV-Ray / SolidWorks
  • Languages: Japanese, English

AFFILLIATION
  • ACM
  • IEEE
    • Computer Society