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Education

  • 2022
    Ph.D. in Computer Science
    Brown University, Providence, RI, USA
    • advised under Prof. Michael L. Littman
    • Dissertation Title: Explaining Reinforcement Learning Agents by Policy Comparison
  • 2015
    M.S. in Computer Science
    Brown University, Providence, RI, USA
  • 2009
    M.S. in Media Arts and Sciences
    Massachusetts Institute of Technology, Cambridage, MA, USA
  • 2006
    B.S. in Computer Science and Engineering
    Seoul National University, Seoul, South Korea
    • graduated Summa Cum Laude
    • Thesis Title: Improvements in the Performance of the Hexagonal Tortoise Problem using the Hybrid Genetic Algorithms

Research Areas

  • Reinforcement Learning, Explainable Aritificial Intelligence (XAI), Artificial Intelligence, Machine Learning, Game Theory, Robotics, and Human Robot Interaction (HRI)

Work Experience

  • 2013-2021
    Research Assistant
    Department of Computer Science, Brown University, Providence, RI, USA
    • Conducted a research on developing a novel method to perform a policy comparison analysis for reinforcement learning agents.
    • Participated in XAI (Explainable Artificial Intelligence) project funded by DARPA in collaboration with CRA and Umass Amherst. Developed various methods to analyze generalization on deep learning agents.
  • 2016
    Instructor
    Department of Computer Science, Brown University, Providence, RI, USA
  • 2015
    Teaching Assistant
    Department of Computer Science, Brown University, Providence, RI, USA
    • Was a graduate teaching assistant (GTA) for CSCI1410 Applied Artificial Intelligence taught by Prof. Stefanie Tellex.
    • Redesigned and implementd a class project about the FastSLAM algorithm.
    • Wrote the parts of both the midterm and final exams.
  • 2011-2013
    Software Engineer
    Vecna Technologies, Inc., Cambridge, MA, USA
    • Developed web applications for hospital kiosks.
    • Programmed on both the server and client side of the application with Java EE, JSP, Hibernate, Struts, Spring, Javascript (AJAX), and HTML5/CSS3.
    • Developed Android applications for hospital applications.
  • 2010
    Freelance Software Engineer
    • Designed and developed an educational iPad applications on the iOS platform using both the native objective-c language and web technologies (HTML5, CSS3 and Javascript).
  • 2008-2009
    Technical Assistant
    The Personal Robots Group, The Media Lab, Massachusetts Institute of Techonology, Cambridge, MA, USA
    • Designed and conducted two empirical user studies to evaluate the facial features of the MDS robot platform with senior citizens in the Greater Boston Area.
    • Developed a dialogue system for the MDS humanoid platform with a gazing capability.
  • 2006-2008
    Research Assistant
    The Personal Robots Group, The Media Lab, Massachusetts Institute of Techonology, Cambridge, MA, USA
    • Worked in the Personal Robots Group, The Media Lab under Prof. Cynthia Breazeal.
    • Developed three different kinds of teleoperation interfaces (web, gesture-based, and sympathetic interfaces) for a robot called Huggable.
  • 2006
    Software Engineer
    Thingsoft Co., Neowiz Co., Seoul, South Korea
    • Worked in the FIFA Online 2006 team in association with the EA Sports, Co, Canada.
    • Designed User Interface for online front end system and Servers which exchange inner game data.
  • 2000-2001
    Researcher and Developer in Multimedia
    Samsung Electronics Software Membership (SSM), Seoul, South Korea
    • Worked in the Audio Visual laboratory which was especially founded to promote media art and human computer interaction projects.
    • Participated in three artistic and engineering projects: PolyMorphes, Ripple of Emotion(2000) and Trialogue(2001).
  • 2001
    Software Engineer Intern
    Nexon Co., Seoul, South Korea
    • Worked in the Centralized Game Sever Programming Team which managed over 50,000 concurrent user connections.

Patents

  • 2014
    Methods of robot behavior generation and robots utilizing the same
    • Authors: Lee, H., Ota, Y., Breazeal, C., and Lee, J. K.
    • U.S. Patent, 8,751,042, Filed in Dec, 2011, and Issued in Jun, 2014.
  • 2008
    Interactive Systems Employing Robotic Companions
    • Authors: Stiehl, W. D., Breazeal, C., Lee, J. K., Maymin, A. Z., Knight, H., Toscano, R., and Cheung, I. M.
    • U.S. Patent, 8,909,370, Filed in May, 2008, and Issued in Dec, 2014.

Awards and Scholarships

  • Recipient : the Graduate Study Abroad Scholarship, supported by Samsung Scholarship Foundation, Seoul, Korea.
  • Recipient : Scholarships for academic excellence from Seoul National University.
  • 1st, 5th Place : Asian Regional ACM International Collegiate Programming Contests (ICPCs), 2000.
  • 5th, 3rd Place : Asian Regional ACM International Collegiate Programming Contests (ICPCs), 2001.
  • Winner : The 4th Computer Music Contest in Korea, sponsored by Korean Electro-Acoustic Music Society, Seoul, Korea, 2001.
  • Silver award winner and Bronze award winner : Samsung Electronics Software Membership Award, sponsored by Samsung Electronics Co., Ltd., Seoul, Korea, 2001, 2000.
  • 1st Place : National High School Contest in Informatics, Yonsei Univeristy, Seoul, Korea, 1998.

Skills

  • Programming : Python, C/C++, Java, Javascript, HTML5/CSS.
  • Languages : Korean(Native), English(Proficient).