JeongGil Ko, Ph.D.

Associate Professor, School of Integrated Technology, College of Computing

Associate Professor (Adjunct), Department of Biomedical Systems Informatics, College of Medicine

Sustainable Development Fellow Professor, Institute for Global Engagement and Empowerment

Associate Vice President for Information and Communications

Yonsei University

고 정 길

연세대학교 인공지능융합대학 IT융합공학과 부교수

연세대학교 의과대학 의생명시스템정보학과 겸임교수

연세대학교 정보통신처 부처장

CV: Link (last updated: Feb 21, 2022)

  • I am always searching for talented and enthusiastic students to work with! Feel free to contact me if you are interested in embedded and intelligent computing systems research. Before you do so, please take a look at my specific research areas and publications. Preference will be given to students with strong programming skills and some level of knowledge in embedded systems and/or machine learning. I currently have open positions for Postdocs, Ph.D., masters degree students and undergraduate research students. Note: If you are wishing to pursue a graduate degree, contacting me will not assure you admission to the Yonsei University graduate program.

JeongGil's Google Scholar Page


JeongGil Ko is an associate professor in the School of Integrated Technology, College of Computing and the Department of Biomedical Systems Informatics, College of Medicine, and serves as the Associate Vice President for Information and Communications at Yonsei University. He received his B.Eng. in Computer Science and Engineering from Korea University (2007) and received his Ph.D. in Computer Science from the Johns Hopkins University (2012). He was at the Department of Computer Science, Stanford University as a visiting researcher (2010) and was a senior researcher at the Electronics and Telecommunications Research Institute (2012-2015). Prior to joining Yonsei, JeongGil was an assistant professor at the Department of Software and Computer Engineering at Ajou University (2015-2019). He is a recipient of the Abel Wolman Fellowship awarded by the Whiting School of Engineering at the Johns Hopkins University and a senior member of the IEEE. JeongGil has served on the program committee for many top conferences in the mobile and ubiquitous computing field (ACM MobiCom, MobiSys, SenSys, IEEE PerCom in particular), and is an associate editor for several academic journals including PACM IMWUT. His research interests are in the general area of developing mobile/embedded sensing systems with ambient intelligence and systems-related topics for enabling efficient XR applications.

Research Interests:

  • Mobile and ubiquitous computing systems

  • Mobile and embedded sensing-based machine learning system design

  • Deep learning model compression and optimization for mobile and embedded platforms

  • Mobile VR/AR system optimization

  • Healthcare applications using mobile and embedded sensing systems

Current and past affiliations


Research Experience / Employment History:

Research Community Services:

  • Technical Program Committee (TPC):

    • 2023: AAAI, IEEE PerCom, ACM CSCW (Associate Chair), WWW, DCOSS-IoT, EWSN, SmartComp

    • 2022: ACM MobiCom, ACM SenSys, IEEE PerCom, ACM UbiComp (Technical Program Chair), IEEE MASS (Systems and Applications Track Chair), IEEE SECON, EWSN, IEEE/ACM CHASE, SmartComp

    • 2021: ACM SenSys, ACM/IEEE IPSN, ACM CSCW (Associate Chair), IEEE SECON, IEEE MASS, EWSN, ICOIN, IEEE PerHealth, WellComp (Co-Chair)

    • 2020: IEEE COMSNETS (PC Co-chair), ACM SenSys, IEEE SECON, IEEE ICDCS, IEEE WCNC, ICOIN, ICTC, WellComp (Co-Chair)

    • 2019: ACM MobiSys, ACM Digital Public Health, IEEE BSN, WellComp (Co-Chair), EarComp, ICTC

    • 2018: ACM MobiSys (ERC), EWSN, IEEE ICDCS, IEEE ICII, IEEE DCOSS, IEEE ICCCN, ACM Digital Health, IEEE MiSeNet, CitiFog, WellComp (Co-Chair)

    • 2017: ACM MobiSys (ERC), ACM SenSys (EPC), ACM HotMobile , IEEE INFOCOM, EWSN, ICCCN, IEEE ICDCS, ACM Digital Health

    • 2016: IEEE INFOCOM, IEEE SECON, EWSN, ACM Digital Health

    • 2015: IEEE SECON, IEEE ICDCS , BodyNets , ACM Digital Health, ACM MCSS , IoT-App

    • 2014: IEEE SECON, BodyNets, ACM SmartHealthSys, IEEE MASS, IEEE VTC

    • 2013: IEEE SECON, BodyNets

    • 2012: IEEE IoTech

  • Journal Editorial Board

    • Associate Editor, IEEE Transactions on Mobile Computing (TMC): 2022 -Current

    • Associate Editor, Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT): 2018-Current

    • Editor and Area-Editor, KSII Transactions on Internet and Information Systems: 2020-Current

    • Associate Editor, Frontiers in Communications and Networks: 2020-Current

    • Editor, ICT Express: 2021-Current

    • Publication Editorial Board, ICT Express: 2018-Current

  • Organizer

    • ACM ASSET 2016/2018, WellComp 2018/2019/2020

  • Local Arrangements Chair:

    • ACM SenSys 2015, ACM BuildSys 2015, ACM MobiSys 2019

  • Poster/Demo Chair:

    • ACM/IEEE IPSN 2020, 2022, IEEE SECON 2020

  • Publicity Chair:

    • HotSmartCity 2013, ACM MobileHealth 2015, ACM MobiSys 2017, ACM HotMobile 2018, ACM MobiCom 2017/2021, EWSN 2019/2021/2022, ACM SenSys 2022

  • Publications Chair:

    • IEEE SECON 2013

  • Web Chair:

    • S-Cube 2011

  • Work in Progress Chair

    • IEEE RTCSA 2016

  • Workshop Chair

    • IEEE MDM 2017, ACM Ubicomp 2018, ACM ISWC 2018

  • Special Event Chair

    • ACM SenSys 2020

  • Student Travel Grants Chair

    • ACM MobiSys 2022

  • Board of Directors

    • Korean Institute of Communication and Information Sciences (한국통신학회 이사/집행이사): 2017- Current

    • Korean Society for Digital Therapy (대한디지털치료학회 이사): 2022-Current

    • Institute of Embedded Engineering of Korea (대한임베디드공학회 상임이사): 2016-2021

    • Korean Institute of Medical Informatics (대한의료정보학회 이사): 2017-2018

Selected Recent (5-year window) Publications (Full List and Articles) (Google Scholar):

  • Jaewon Choi, Seungchan Jeong, JeongGil Ko. "Emulating Your eXtended World: An Emulation Environment for XR App Development", IEEE MASS 2022 (Invited Paper).

  • In Gim, JeongGil Ko. "Memory-efficient DNN Training on Mobile Devices", ACM MobiSys 2022.

  • Hyunjun Kim, JeongGil Ko. "Fast Monte-Carlo Approximation of the Attention Mechanism", AAAI 2022.

  • Sinh Huynh, Rajesh Krishna Balan, JeongGil Ko. "iMon: Appearance-based Gaze Tracking System on Mobile Devices", ACM UbiComp 2022.

  • HyeonJung Park, Youngki Lee, JeongGil Ko. "Enabling Real-time Sign Language Translation on Mobile Platforms with On-board Depth Cameras", ACM UbiComp 2021.

  • Jaewon Choi, JeongGil Ko. "Low Quality for High Quality: Exploiting 2K Frames for Supporting Efficient 4K-Quality Pervasive Video Streaming Applications", IEEE Pervasive Computing, Special Issue on Pervasive Video and Audio, 2021.

  • Eunseong Boo, Joongheon Kim, JeongGil Ko. "LiteZKP: Lightening Zero-Knowledge Proof-based Blockchains for IoT and Edge Platforms", IEEE Systems Journal, 2021.

  • Taewook Heo, Woojin Nam, Jeongyeup Paek, JeongGil Ko. "Autonomous Reckless Driving Detection Using Deep Learning on Embedded GPUs", IEEE MASS 2020.

  • Jaeyeon Park, Hyeon Cho, Rajesh Krishna Balan, JeongGil Ko. "HeartQuake: Accurate Low-Cost Non-Invasive ECG Monitoring Using Bed-Mounted Geophones", ACM UbiComp 2020 (PACM IMWUT Distinguished Paper Award).

  • Joongyum Kim, Taesik Gong, Kyungsik Han, Juho Kim, JeongGil Ko, Sung-Ju Lee. "Messaging Beyond Texts with Real-time Image Suggestions'', ACM MobileHCI 2020.

  • Joon-Gyum Kim, Taesik Gong, Bogoan Kim, JaeYeon Park, Woojeong Kim, Evey Huang, Kyungsik Han, Juho Kim, JeongGil Ko, Sung-Ju Lee. "No More One Liners: Bringing Context into Emoji Recommendations", ACM Transactions on Social Computing, 2020.

  • Huynh Nguyen Phan Sinh, Rajesh Balan, JeongGil Ko, Youngki Lee. "VitaMon: Measuring Heart Rate Variability Using the Smartphone Front Camera'', ACM SenSys 2019.

  • Eunseong Boo, Shahid Raza, Joel Höglund, JeongGil Ko. "FDTLS: Supporting DTLS-based Combined Storage and Communication Security for IoT Devices", IEEE MASS 2019.

  • Jaewon Choi, HyeonJung Park, Jeongyeup Paek, Rajesh Balan, JeongGil Ko. "LpGL: Low-power Graphics Library for Mobile AR Headsets", ACM MobiSys 2019.

  • Jungmo Ahn, Hyungi Kim, Eunha Kim, JeongGil Ko. "Designing a Low-Cost IoT Sensing Platform for VOC Material Classification", IEEE DCOSS 2019.

  • Jungmo Ahn, Huynh Nguyen Loc, Rajesh K. Balan, Youngki Lee, JeongGil Ko. "Finding Small Bowel Lesions: Challenges in Endoscopy Image-based Learning Systems", IEEE Computer, 2018.

  • Huynh Nguyen Phan Sinh, Seungmin Kim, JeongGil Ko, Rajesh K. Balan, Youngki Lee. "EngageMon: Multi-Modal Engagement Sensing for Mobile Games", ACM UbiComp 2018.

Awards and Honors:

  • Best Guest Editor Award, ICT Express, 2022.

  • Outstanding Teaching Award, Yonsei University (연세대학교 우수강의교수상), 2022.

  • Distinguished Paper Award, PACM IMWUT, 2021.

  • Best Poster Award, Korean Otological Society Conference 2021.

  • Best Reviewer Award, ICT Express, 2020.

  • Best Poster Runner Up Award, COMSNETS 2020.

  • Best Reviewer Award, ICT Express, 2019.

  • Ajou Publication Award, Ajou University, 2019.

  • Best Demo Award, ACM HotMobile 2019.

  • Ajou Publication Award (Bronze), Ajou University, 2018.

  • Best Paper Award, KICS Winter Conference 2018.

  • Best Demo Award, ACM SenSys, 2015.

  • Best Poster Award, IEEE SECON 2012.

  • Student Travel Grant, IEEE SECON 2010.

  • Abel Wolman Fellowship, Whiting School of Engineering, Johns Hopkins University, 2007-2008.

  • College Scholarship, College of Information and Communications, Korea University, 2005-2006.

Major Research Projects (Project Details):

  1. Intelligent Sensing Systems

    • HeartQuake: Contactless ECG sensing using bed-mounted geophones

    • VOCkit: VOC-recognizing IoT system development

    • EngageMon: Multi-modal engagement sensing for mobile games

    • SmartEndo: Real-time data analysis for smart capsule endoscopy

    • SmartHR: Self-classifying smartwatch heart rate sensor accuracy

    • MediSense: Improving clinical data quality using on-bed motion sensors

    • MarketNet: Enabling electronic price tagging in indoors marketplaces

    • ReLiSCE: Resource limited sensor-based context extraction

    • ChildSafe: Detecting children's' presence using 3D depth cameras

    • MEDiSN: A multi-tiered wireless sensing system for real-time physiological signal data collection

  2. Mobile Computing and AR/VR Systems

    • 4KODEC: Supporting ultra high-quality interactive video streaming with lower-quality videos

    • SUGO: Smartphone depth camera-based Korean Sign Language translation

    • LpGL: Energy-efficient graphics support for mobile AR/VR headsets

    • XREmul: Providing an effective input emulation environment for AR/VR application development

    • Vision Assistance Glass: Designing a wearable headset for vision therapy assistance

    • VoCell: Smartphone application development framework for vehicular networking applications

    • Energy-aware Miracast: Improving mobile video codecs for energy efficient operations

  3. Embedded Networked Systems and Software Design

    • LiteZKP: Designing a lightweight Zero Proof Knowledge protocol for use in IoT/Edge computing platforms

    • FDTLS: Supporting DTLS-based storage and network security for IoT systems

    • SecureIoT: Certificate-based Security for Resource-constrained Internet of Things

    • iSDR: Supporting software radios on smartphones with efficient processing and energy consumption

    • PEASST: Point-to-point Packet Exchange with Asynchronous Sleep and Synchronous Transmissions

    • Egs Platform: A high-end mote platform design based on a ARM Cortex-M3 32-bit microcontoller

  4. IETF Routing Protocol for Low-power and Lossy Networks (RPL) Protocol Design and Enhancements

    • Downwards RPL Enhancements: Improving the efficiency of RPL's downwards routing capabilities

    • DualMOP-RPL: Supporting multiple modes of operation for RPL networks

    • MoMoRo: Mobile-to-mobile routing for IPv6-based low-power and lossy wireless networks

    • TinyRPL: TinyOS implementations of the IPv6 RPL routing protocol

Advised Students / Researchers:

Primarily Advised Students and Researchers

  • Jaeyeon Park (Ph.D. Candidate)

  • Jaewon Choi (Ph.D. Candidate)

  • Sungmin Lee (Ph.D. Student)

  • Yujin Shin (Ph.D. Student)

  • Kichang Lee (Ph.D. Student)

  • Hanju Jang (Ph.D. Student)

  • Soobin Lee (Ph.D. Student)

  • Jaehee Choi (M.S. Student)

  • Yongun Choi (M.S. Student)

  • Minjoo Kang (M.S. Student)

  • Jungmo Ahn (Ph.D. Graduated 2022; Co-advised with Prof. Jeongseob Ahn @ Ajou University, Now at: Hyundai Mobis)

  • Hyunjun Kim (In Gim) (Affiliated Researcher 2020-2022, Now at: Yale University - Ph.D. student)

  • HyeonJung Park (MS. Graduated 2022, Now at: Hyundai Mobis)

  • Dr. Sinh Huynh (Visiting Ph.D. Student 2019, Postdoc 2020-2021, Now at: Torus.AI)

  • Eunseong Boo (MS. Graduated 2020, Now at: Theori - military service)

  • Seungmin Kim (MS. Graduated 2020, Now at: RTst - military service)

  • Woojin Nam (MS. Graduated 2019, Now at: KT)

  • Hyuksang Kwon (MS. Graduated 2018, Now at: Alchera Inc.)

  • Nakhyun Kim (MS. Graduated 2016, Now at: SK Hynix)

Intern and Co-advised Students while at ETRI

  • Dr. Yongtae Park, Korea University (Now at: Ettifos Co.)

  • Dr. Homin (Andrew) Park, DGIST (PhD Thesis Committee, Now at: A*STAR Singapore)

  • Dr. Ho Kyeong (HK) Ra, DGIST (PhD Thesis Committee, Now at: IBM Watson)

  • Dr. Hee Jung (Sion) Yoon, DGIST (PhD Thesis Committee, Now at: City University of Seattle - Faculty)

Media Coverage on My Research:

  • IEEE Press Release, "Wireless Sensor Networks Get Real with Real-World Applications in the November Issue of the Proceedings of the IEEE". Dec 01 2010 [link]

  • Discovery Channel Technology Video, "Emergency Rooms Go Wireless". Apr 10 2010 [link]

Research Community Memberships:

  • IEEE (Senior Member), IEEE Communications Society, ACM, ACM SIGMOBILE

  • TinyOS Core, net2, 15.4, ZigBee Working Groups

  • KOCSEAA (Korean Computer Scientists and Engineers Association in America)

  • KIISE (Korea Institute of Information Scientists and Engineers)


  • Email: , jeonggil.ko [at] (preferred), jeonggil.ko [at], jeonggil.ko [at], jeonggil.ko [at]

  • Previous Emails (no longer functional/used): jgko [at], jgko [at], jgko [at], jeonggil.ko [at], jgko [at]

  • Office Address:

    • International Campus (Songdo Research Office - 연구실)

      • 306 Vertitas C Hall, Yonsei University, 85 Songdogwahak-Ro, Yeonsu-Gu, Incheon, South Korea, 21983

      • 인천광역시 연수구 송도과학로 85 연세대학교 진리관C 306호 (우: 21983)

      • Office Phone: +82-32-749-5813

    • Sinchon Campus (Associate VP Office - 정보통신처 부처장실)

      • 270 Engineering Research Park, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul, 03722

      • 서울특별시 서대문구 연세로 50 연세대학교 공학원 270호 (우: 03722)

      • Office Phone: +82-2-2123-6401

Caricature of me from 2013