Interactive Visual Analysis and Data Exploration Research


Lab.: http://ivaderlab.unist.ac.kr/

Open positions)
*I am looking for motivated undergraduate research interns and graduate students, who will love to design and evaluate novel user interfaces,
visualization techniques, interaction methods, and visual analytics systems (using deep learning).

*If you are interested in researching on human perception, cognition, interactions (even in VR and AR), deep learning interfaces and applications, please email me.

Important! To work with me you should contact me first before you apply. 

See my calendar to schedule a meeting: http://ivader.unist.ac.kr/my-calendar

Desired programing skills) Any combination of C++, Java,
Python, OpenGL, Unity, Web development (JavaScript, D3.js, WebGL, jQuery, Django, HIghcharts, Raphael, Bootstrap, MongoDB,  ...). 

Sungahn Ko (고성안) 

Assistant Professor

School of Electrical & Computer Engineering

UNIST (Ulsan National Institute of Science & Technology), Korea

Office:  Bldg. 106 401-10

Tel: +82 52 217 2161, Fax: 052-217-2128


  •  Ph.D. Purdue Univ., 2014
  •  M.S. KAIST, 2008
  •  B.E. Korea Univ., 2006


Research areas

  • Visual analytics (with Machine Learning/Deep Learning)
  • Information visualization
  • HCI (Human-Computer Interaction)
  • Big Data Analytics/Data Mining
  • User Interface and Software Design and Evaluation (UX design)
  • Human Perception/Cognitive Science
  • Human Factors in VR/AR

Visualization keywords
*Machine-Learning (ML),
Deep Learning, big data, multivariate, multi-dimensional, high-dimensional, spatial, temporal, spatial-temporal, business intelligence, disaster, financial, traffic and movement analysis, bioinformatics

HCI keywords
ser interface design, human (or personal) activity analysis, human perception and pattern recognition ability analysis, human factors in visualization


Kuatbek Mukabak

Juyoung Oh (a research intern at ETRI, 2016 Winter)

Chunggi Lee

Jaesung Lee (a research intern at ETRI, 2017 Summer)

Kihwan Kim

Dongyun Han


Taek Soo Kim

Hong Jun Yang

Hwiyeon Kim

Poongsung Lee

Yeonjun Kim

Hansu Cheon

Sanghoon Kim 


2017 Undergraduate: Yousang Oh (Samsung Electronics), Hyungmin Kang (Naver LIne), YongSeok Jung (LG Electronics)

2018 Undergraduate: Soyeun Lee (LG Electronics), Hansol Yoo (Hana Bank Data Analytics Team)


ITP 701, 703 Engineering Programming (2017 SPR)

CSE 24101 Object-oriented programing (2016 SPR, 2017 Fall)

CSE 48001 Information Visualization (2016 Fall), Human-Computer Interaction (2018 Spr)

ECE 52401 Software Engineering (2016 Fall)

CSE 61001 Visual Analytics (2017 Fall), Advanced Human-Computer Interaction (2018 Spr)


*Sungahn Ko, Isaac Cho, Shehzad Afzal, Calvin Yau, Junghoon Chae, Abish Malik, Kaethe Beck, Yun Jang, William Ribarsky, David S. Ebert, "A Survey on Visual Analysis Approaches for Financial Data," Computer Graphics Forum (EuroVis 2016),  35(3):599-617, 2016 [PDF]

*Jiawei Zhang, Benjamin Ahlbrand, Abish Malik, Junghoon Chae, Zhiyu Min, Sungahn Ko and David S. Ebert, "A Visual Analytics Framework for Microblog Data Analysis at Multiple Scales of Aggregation," Computer Graphics Forum (EuroVis 2016), 35(3):441-450 [PDF]

*Junghoon Chae,Ziawei Zhang, Sungahn Ko, Abish Malik, Heather Connell,  David Ebert,  "Visual Analytics for Investigative Analysis of Hoax Distress Calls using Social Media," IEEE International Symposium on Technologies for Homeland Security, 2016 [PDF]

*Sungahnn Ko, Jieqiong Zhao, Jing Xia, Shehzad Afzal, Xiaoyu Wang, Greg Abram, Niklas Elmqvist,, Len Kne, David Van Riper, Kelly Gaither, Shaun Kennedy, William Tolone, William Ribarsky, David S. Ebert, "VASA: Interactive Computational Steering of Large Asynchronous Simulation Pipelines for Societal Infrastructure," IEEE Transactions on Visualization and Computer Graphics (IEEE Vis 2014), 20(12):1853-1862, 2014 [PDF]

*Sungahnn Ko, Shehzad Afzal, Yang Yang, Junghoon Chae, Abish Malik, Yun Jang David Ebert, "Analyzing High-dimensional Multivariate Network Links with Integrated Anomaly Detection, Highlighting and Exploration", IEEE Conference on Visual Analytics Sciences and Technology (IEEE Vis 2014), p83-92, 2014 [PDF]

*Chen, V.Y., Razip, A.M., Ko, S., Qian, C.Z., and Ebert, D.S., "Multi-aspect visual analytics on large-scale high-dimensional cyber security data", Information Visualization, 2013 [PDF]

*Maciejewski, R., Pattath, A., Ko, S., Hafen, R., Cleveland, W., Ebert, D., "Automated Box-Cox Transformations for Improved Visual Encoding," IEEE Transactions on Visualization and Computer Graphics, 19(1): 130-140, 2013 [PDF]

*Sungahn Ko, Jang, Y., Maciejewski, R., Ebert, D, "MarketAnalyzer: An Interactive Visual Analytics System for Analyzing Competitive Advantage Using Point of Sale Data," Computer Graphics Forum (EuroVis 2012), 31(3):1245-1254, 2012 [PDF]

*Sungahn Ko, KyungTae Kim, Tejas Kulkarni, Niklas Elmqvist, "Applying mobile device soft keyboards to collaborative multitouch tabletop displays: design and evaluation," Proceedings of International Tabletop Surface,  p130-139, 2011 [PDF]

*KyungTae Kim, Sungahn Ko, Niklas Elmqvist, David S. Ebert, "WordBridge: Using Composite Tag Clouds in Node-Link Diagrams for Visualizing Content and Relations in Text Corpora," HICSS 2011: 1-8 [PDF]

*Man-Keun Seo, Sungahn Ko, Kyu Ho Park, "NLE-FFS: A Flash File System with PRAM for Non-linear Editing," IEEE Transactions On Consumer Electronics, 55(4):2016-2024, 2009 [PDF]

Domestic (Publications and Awards)

*김승규, 한동윤, 고성안, 박영우,  AirScope, Excellence Prize (우수상), Creative Award, Exhibition,  HCI Korea, 2018, [VIDEO]

*이재성, 김기환, 이충기, 고성안, 시각화 기반 딥러닝 분석 기술,  소음 진동, 제 27권 제6호, 20-24, 한국소음진동공학회, 2017

*오유상, 이충기, 오주영, 양지현, 곽희나, 문성우, 박소환, 고성안,  비주얼 애널리틱스 연구 소개,  한국컴퓨터그래픽스,  제22권 제5호, 27-36, 2016

Professional Activities

Paper Reviews:

EG/VGTC Conference on Visualization (EuroVis), 2017

IEEE Pacific Visualization, 2017, 2018

IEEE VIS (VAST), 2016, 2017

IEEE Computer Graphics and Applications, 2017

IEEE Transactions on Intelligent Transportation Systems, 2016

ACM Designing Interactive Systems (DIS), 2018


IEEE Pacific Visualization, Sponsorship chair (2017) & Visualization Notes Committee (2018)


UNIST ECE: http://ece.unist.ac.kr/

UNIST Address: 401-10, Bldg. 106, 50, UNIST-gil, Ulsan 44919, Republic of Korea.

우편번호 44919, 울산광역시 울주군 언양읍 유니스트길 50, 울산과학기술원, 106동 401-10

Lab: 106동 303호