JeongGil Ko (고정길)

JeongGil Ko, Ph.D.

Associate Vice President for Strategy, Office of University Planning and Management

Associate Professor, School of Integrated Technology, College of Computing

Sustainable Development Fellow Professor, Institute for Global Engagement and Empowerment

Former Associate Vice President for Information and Communications

Yonsei University, Seoul, Korea

Guest Professor, Graduate School of Media and Governance, Keio University, Japan

Treasurer (Executive Committee), ACM SIGMOBILE

고 정 길

연세대학교 기획실 전략부실장 / 대학혁신지원사업단장 / IR센터장

연세대학교 인공지능융합대학 첨단융합공학부 부교수 (모빌리티시스템전공 책임교수)

연세대학교 글로벌사회공헌원 지속가능발전펠로우 교수

(前) 연세대학교 정보통신처 부처장 / 학사정보시스템추진단장

일본 게이오기주쿠대학 (慶應義塾大学) 정책・미디어연구과(政策・メディア研究科) 특별초빙교수

ACM SIGMOBILE 집행위원회 재무이사

CV: Link (last updated: Mar 1, 2026)

Please visit our research group's website [Embedded Intelligent Systems Lab] for up-to-date information on me and my group's research.

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.
We DO NOT have openings for 2026 (spring/fall), but I will be happy to discuss and meet with students interested in joining our lab for 2027.
Our group has a small number of openings for non-Yonsei undergraduate internship students with a strong computer science background.
우리 연구실은 인공지능융합대학 첨단융합공학과 대학원 소속이지만 연세대학교-현대자동차 계약학과(인공지능융합대학 모빌리티시스템융합협동과정)를 통해서도 지원이 가능합니다. 첨단융합공학과 대학원이 아닌, 모빌리티시스템융합협동과정을 통해 연구실 join을 희망하는 학생은 해당 과정 합격 후 연락 바랍니다.

Bio:

JeongGil Ko is the Associate Vice President for Strategy at the Office of University Planning and Management at Yonsei University, Seoul, Korea, and an Associate Professor in the School of Integrated Technology, College of Computing, also serving as Chair of the Mobility Systems Major within the School of Integrated Technology. He previously served as Associate Vice President for Information and Communications (2022–2024) and as Chair of the Integrated Information Technology Major (2025–2026). In addition, he serves as a Guest Professor at Keio University’s Graduate School of Media and Governance, and previously served as an Adjunct Professor in the Department of Biomedical Systems and Informatics at Yonsei University College of Medicine (2022–2026) and also at the Pohang University of Science and Technology (POSTECH) Graduate School of Artificial Intelligence (2023-2026).

He received his B.Eng. in Computer Science and Engineering from Korea University in 2007 and his Ph.D. in Computer Science from Johns Hopkins University in 2012. During his doctoral studies, JeongGil was a Visiting Researcher in the Department of Computer Science at Stanford University in 2010. Prior to joining Yonsei, he was with the Electronics and Telecommunications Research Institute (ETRI) from 2012 to 2015 as a Senior Researcher, and as an Assistant Professor in the Department of Software and Computer Engineering at Ajou University from 2015 to 2019.

JeongGil has played active leadership roles in the mobile and ubiquitous computing research community. He has served on program and organizing committees for major conferences including ACM MobiCom, MobiSys, SenSys, and IEEE PerCom. He was the Technical Program Chair for ACM UbiComp 2022 and the General Chair for ACM MobiSys 2024, and currently serves on the Executive Committee of ACM SIGMOBILE as Treasurer. He also serves on the editorial boards of leading journals, including the Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), IEEE Transactions on Mobile Computing, ACM Transactions on Internet of Things, and IEEE Transactions on Quantum Engineering.

His research contributions have been recognized at top venues, including the Best Paper Award at ACM MobiSys 2024 and a Distinguished Paper Award from IMWUT. He is a recipient of the Abel Wolman Fellowship from the Whiting School of Engineering at Johns Hopkins University and received a Commendation from the Deputy Prime Minister and Minister of Education of the Republic of Korea for his contributions to research and education in mobile computing. He is a Senior Member of both ACM and IEEE.

His research interests focus on mobile and embedded sensing systems, networked platforms, and applications that enable ambient intelligence in real-world environments.

Research Interests:

Mobile, embedded and ubiquitous sensing-based intelligent system design
AI model compression, acceleration and system-level optimization for resource-limited platforms
Mobile and embedded healthcare sensing systems
Quantum computing and machine learning for biomedical applications

Current and past affiliations

Education:

Ph.D., 2012, Department of Computer Science, Johns Hopkins University, Baltimore, Maryland.
- Dissertation: Designing a Low-power Mobile Sensing System for Wireless Healthcare Applications
- Advisor: Dr. Andreas Terzis
B.Eng., 2007, Department of Computer Science and Engineering, Korea University, Seoul, Korea.

Research Experience / Employment History:

Associate Professor (Sep 2021 - Current), School of Integrated Technology, College of Computing, Yonsei University, Seoul, Korea
- Department Chair (Mar 2026 - Current), Mobility Systems Major
- Department Chair (Mar 2025 - Feb 2026), Integrated Information Technology Major
Associate Vice President for Strategy (Mar 2026 - Current), Office of University Planning and Management, Yonsei University, Seoul, Korea (연세대학교 기획실 전략부실장)
Sustainable Development Fellow Professor (Jul 2022 - Current), Institute for Global Engagement and Empowerment, Yonsei University, Seoul, Korea
Guest Professor (Oct 2023 - Current), Graduate School of Media and Governance, Keio University, Fujisawa/Tokyo, Japan
Affiliate Faculty (Sep 2023 - Feb 2026), Graduate School of Artificial Intelligence, Pohang University of Science and Technology (POSTECH), Pohang, Korea
Associate Professor (Adjunct) (Mar 2022 - Feb 2026), Department of Biomedical Systems and Informatics, College of Medicine, Yonsei University, Seoul, Korea
Associate Vice President for Information and Communications (Mar 2022 - Feb 2024), Yonsei University, Seoul, Korea (연세대학교 정보통신처 부처장)
Assistant Professor (Sep 2019 - Aug 2021), School of Integrated Technology, College of Engineering, Yonsei University, Seoul, Korea
Assistant Professor (Sep 2015 - Aug 2019), Department of Software and Computer Engineering, College of Information Technology, Ajou University, Suwon, Korea
Adjunct Professor (Apr 2016 - Aug 2019), Department of Biomedical Informatics, School of Medicine, Ajou University, Suwon, Korea
Senior Researcher (Jun 2012 - Aug 2015), Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea
Visiting Researcher (Jan 2010 - Apr 2010), Stanford Information Networks Group, Department of Computer Science, Stanford University, Stanford, CA
Graduate Research Assistant (Sep 2007 - Apr 2012), Hopkins interNetworking Research Group, Department of Computer Science, Johns Hopkins University, Baltimore, MD
Undergraduate Research Intern (Dec 2005 - Feb 2007), Wireless Data Communications Lab, Department of Computer Science and Engineering, Korea University, Seoul, Korea

Research Community Services:

Treasurer (Executive Committee), ACM SIGMOBILE (2025 - Current)
Technical Program Committee (TPC):
- 2026: ACM MobiSys (Heavy PC), ACM SenSys. IEEE PerCom, WWW, IEEE ICDCS, EWSN, IEEE SECON
- 2025: AAAI, ACM CHI (Associate Chair), ACM SenSys, IEEE PerCom, IEEE ICDCS, IEEE SECON, ACM CHASE, EWSN
- 2024: AAAI, ACM SenSys, IEEE PerCom, ACM CSCW (Associate Chair), IEEE ICDCS, IEEE DCOSS-IoT, ACM/IEEE IoTDI, ACM FMSys
- 2023: AAAI, ACM SenSys, IEEE PerCom, ACM CSCW (Associate Chair), WWW, IEEE SECON, IEEE 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: ACM SenSys, IEEE SECON, IEEE ICDCS, IEEE/ACM COMSNETS (PC Co-chair), 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
- Editor, IEEE Transactions on Quantum Engineering (TQE): 2024-Current
- Associate Editor, ACM Transactions on Internet of Things (TIOT): 2025-Current
- 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, ICT Express: 2021-Current
- Publication Editorial Board, ICT Express: 2018-2024
- Vice Executive Director, ICT Express: 2023-2024
- Editor and Area-Editor, KSII Transactions on Internet and Information Systems: 2020-2022
Award Selection Committee:
- ACM SIGMOBILE Doctoral Dissertation Award 2025, 2026
General Chair / Organizer:
- ACM ASSET 2016/2018, WellComp 2018/2019/2020/2021, ACM MobiSys 2024
Steering Committee:
- WellComp 2022/2023
Local Arrangements Chair:
- ACM SenSys 2015, ACM BuildSys 2015, ACM MobiSys 2019
Poster/Demo Chair:
- IEEE SECON 2020, ACM/IEEE IPSN 2020/2022, IEEE WoWMoM 2024, ACM MobiSys 2026
Artifact Evaluations Chair:
- ACM MobiCom 2025
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/상임이사): 2017- Current
- Korean Society for Digital Therapy (대한디지털치료학회 이사): 2022-2024
- Institute of Embedded Engineering of Korea (대한임베디드공학회 상임이사): 2016-2021
- Korean Institute of Medical Informatics (대한의료정보학회 이사): 2017-2018

Videos (in Korean)

Interview with EIRIC (April 2022)

NSF Talk for High School Students (July 2022)

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

Minju Kang, Jaeho Jin, Sungmin Lee, JeongGil Ko. "Foreground Graphics-Aware Runtime DNN Scheduling on Mobile GPUs", IEEE PerCom 2026.
Jaewon Choi, JeongGil Ko. "HoloQRam: Efficient Real-Time Spatial Video Delivery via Animated QR Codes", IEEE PerCom 2026.
Thu Tran, Harold Abraham Joseph, Kichang Lee, Kenny Tsu Wei Choo, Dong Ma, Shaohui Foong, Thivya Kandappu, JeongGil Ko, Rajesh Balan. "Dronaquatics: Real-time Swimming Analytics Using Drone Captured Imagery", IEEE/CVF WACV 2026.
Eunsu Baek, Keondo Park, JeongGil Ko, Min-hwan Oh, Taesik Gong, Hyung-Sin Kim. "Position: AI Should Sense Better, Not Just Scale Bigger: Adaptive Sensing as a Paradigm Shift", NeurIPS 2025.
Yujin Shin, Kichang Lee, Sungmin Lee, Yu Rim Choi, Hyung-sin Kim, JeongGil Ko. "Effective Heterogeneous Federated Learning via Efficient Hypernetwork-based Weight Generation", ACM SenSys 2024.
Shuai Zhu, Thiemo Voigt, Fatemeh Rahimian, JeongGil Ko. "On-device Training: A First Overview on Existing Systems", ACM Transactions on Sensor Networks, 2024.
Jonghyuk Yun, Kyoosik Lee, Kichang Lee, Bangjie Sun, Jaeho Jeon, JeongGil Ko, Inseok Hwang, Jun Han. "PowDew: Detecting Counterfeit Powdered Food Products using a Commodity Smartphone", ACM MobiSys 2024 (Best Paper Award).
JaeYeon Park, Kichang Lee, Sungmin Lee, Mi Zhang, JeongGil Ko. "AttFL: A Personalized Federated Learning Framework for Time-series Mobile and Embedded Sensor Data Processing", ACM UbiComp 2023.
JaeYeon Park, Kichang Lee, Noseong Park, Seng Chan You, JeongGil Ko. "Self-Attention LSTM-FCN Model for Arrhythmia Classification and Uncertainty Assessment", Artificial Intelligence in Medicine, 2023.
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.

Awards and Honors:

Deputy Prime Minister and Minister of Education Commendation, Korea (부총리 겸 교육부장관 표창) for Contributions in Mobile Computing Research and Education, 2025.
Outstanding Teaching Award, Yonsei University (연세대학교 우수강의교수상), 2024.
Best Poster Award, Korean Society of Medical Informatics Spring Conference, 2024.
Best Paper Award, ACM MobiSys 2024.
Best Poster Runner-up Award, ACM MobiSys 2024.
Outstanding Teaching Award, Yonsei University (연세대학교 우수강의교수상), 2023.
Best Guest Editor Award, ICT Express, 2022.
Outstanding Teaching Award, Yonsei University (연세대학교 우수강의교수상), 2022.
Distinguished Paper Award, PACM IMWUT (ACM UbiComp), 2021 (Awarded to top papers published in 2020).
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 (Awarded to most promising incoming graduate students in engineering).
College Scholarship, College of Information and Communications, Korea University, 2005-2006.

Major Research Projects (Project Details):

Intelligent Sensing Systems
- HeartQuake: Contactless ECG sensing using bed-mounted geophones
- VItaMon: Ambient heart rate variability detection using smartphone front cameras
- VOCkit: VOC-recognizing IoT system development
- SUGO: Smartphone depth camera-based Korean Sign Language translation
- 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
Intelligent Mobile/Ubiquitous Computing and AR/VR Systems
- FedHM: Federated learning framework for mobile/IoT platforms with heterogeneous models
- AttFL: Federated learning framework for analyzing time-series sensor data
- Sage: On-device deep neural network training framework
- 4KODEC: Supporting ultra high-quality interactive video streaming with lower-quality videos
- 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
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
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

Sungmin Lee (Ph.D. Candidate)
Yujin Shin (Ph.D. Candidate)
Kichang Lee (Ph.D. Candidate)
Hanju Jang (Ph.D. Student)
Minju Kang (Ph.D. Student)
Joonhee Lee (Ph.D. Student)
Shuai Zhu (Ph.D. Student @ Uppsala University; Co-advised with Prof. Thiemo Voigt)
Satoki Hamanaka (Ph.D. Student @ Keio University; Co-advised with Prof. Tadashi Okoshi)
Heewon Lee (M.S. Student)
Gyeongmin Han (M.S. Student)
Dr. Jaewon Choi (Ph.D. Graduated 2026, Now at: Seoul National University Hospital - Postdoc)
- Dissertation tItle: User-Centric Visual Computing Systems: Design and Implementation for Mobile Devices
Soobin Lee (MS. Graduated 2026)
Yongun Choi (MS. Graduated 2024, Now at: LX Semicon)
Dr. Jaeyeon Park (Ph.D. Graduated 2023, Now at: Dankook University - Assistant Professor)
- Dissertation title: Intelligent Physiological Sensing Systems for Digital Healthcare
Dr. Jungmo Ahn (Ph.D. Graduated 2022; Co-advised with Prof. Jeongseob Ahn @ Ajou University, Now at: Hyundai MOBIS)
- Dissertation title: Towards Efficient Collaborative Deep Learning Inference for Image-based Sensing Systems
Hyunjun Kim (In Gim) (Affiliated Researcher and Undergraduate Research Student 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)
Seungmin Kim (MS. Graduated 2020, Now at: RTst)
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)

Interns 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: Singapore University of Social Science - Assistant Professor)
Dr. Ho Kyeong (HK) Ra, DGIST (PhD Thesis Committee, Now at: CVS Health)
Dr. Hee Jung (Sion) Yoon, DGIST (PhD Thesis Committee, Now at: City University of Seattle - Assistant Professor)

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:

ACM (Senior Member), IEEE (Senior Member), ACM SIGMOBILE, IEEE Communications Society
Korean Institute of Communication and Information Sciences (Life Member), Korean Institute of Information Scientists and Engineers (Life Member)
TinyOS Core, net2, 15.4, ZigBee Working Groups
KOCSEAA (Korean Computer Scientists and Engineers Association in America)

Contact:

Email: , jeonggil.ko [at] yonsei.ac.kr (preferred), jeonggil.ko [at] eis-lab.org, jeonggil.ko [at] gmail.com, jeonggil.ko@keio.jp, jko13@alumni.jh.edu
Previous Emails (no longer functional/used): jeonggil.ko [at] eis.yonsei.ac.kr, jgko [at] cs.jhu.edu, jgko [at]jhu.edu, jgko [at] ajou.ac.kr, jeonggil.ko [at] etri.re.kr, jgko [at] korea.ac.kr
Office Address (Songdo - Faculty Office):
- 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
Office Address (Sinchon - Associate VP Office):
- 2XX Underwood Hall, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul, South Korea, 03722
- 서울특별시 서대문구 연세로 50 언더우드관 211-2호 (우: 03722)
- Office Phone: +82-2-2123-5046

Research Reality Check

Nov. 2018 (ICT 산업전망컨퍼런스)

Caricature of me from 2013

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