School of Electrical and Computer Engineering,
Ulsan National Institute of Science and Technology
50 UNIST, EB3 Rm 501-10, Ulsan, 44919, Korea

Office Phone: (052) 217-2144
Alternative Phone: (052) 217-2199 (Hyejin Shin)
Office hours: Tue 19:30-20:30 or by appointment
email: jaesik at unist.ac.kr

Brief Bio (in third person)

Jaesik Choi is an assistant professor in the School of Electrical and Computer Engineering at UNIST (Ulsan, Korea) and an affiliate researcher of the Lawrence Berkeley National Laboratory (the Berkeley Lab) since July 2013. He was a Computer Scientist Postdoctoral Fellow of Computational Research Division at the Berkeley Lab. His research focuses on learning and inference with probabilistic graphical models, combining robot motion planning with AI planning, and spatio-temporal data analysis. He received his Ph.D. in Computer Science from University of Illinois at Urbana-Champaign (2012) and received B.S. degree in Computer Engineering from Seoul National University (2004).


Slides for Deep Learning for Time Series for PRML 2017 Winter at Korea University.

Slides for Machine Learning for Sequential Data at ICCAS 2016 are available, Part 1, Part 2, Part 3, and Part 4.

Slides for Bayesian Nonparametric Tutorial for PRML 2016 at Korea University.


My research group, Statistical Artificial Intelligence Lab (SAIL@UNIST) at UNIST, currently has openings! If you are interested in the positions, please apply.

A fast and effective way which could achieve up to 100X of compression ratio of many real-world big data. “Novel Data Reduction Based on Statistical Similarity” with Dongeun Lee, Alex Sim and John Wu is accepted at SSDBM-16 (May 2016).

A new perspective to analyze the success (failure) probability in dynamical compressive sensing framework. “Improving Imprecise Compressive Sensing” with Dongeun Lee and Rafael de Lima is accepted at UAI-16 (May 2016).

An improved way to generate human readable reports from time series data, “The Relational Automatic Statistician System” with Yunseong Hwang (now at NAVER Search solution) and Anh Tong is accepted at ICML-16 (April 2016).

I serve on Programming Committee of AAAI 2016, KR 2016, UAI 2016, ACML 2016 and StarAI 2016, and Reviewer for NIPS 2016.

Best Paper award at DataCom 2015. A predictive model for US household electricity data with Taehoon Kim, Dongeun Lee and colleagues in the Berkeley Lab receives the best paper award at DataCom 2015 (December 2015).

A new pragmatic archiving scheme for spatio-temporal sensor data! “A Scalable and Flexible Repository for Big Sensor Datawith Dongeun Lee and Prof. Heonshik Shin (Seoul National University) is accepted at IEEE Sensors Journal (August 2015).

A report on machine learning for Legislative Knowledge Service is published in the National Assembly Library of Korea.

A large scale data reduction framework, “Data Reduction Method with Locally Exchangeable Measures” with Alex Sim (Berkeley National Lab) is now patent pending (May 2015).

A new National IT Industry Promotion Agency (NIPA) grant is acknowledged (January 2015 ~ December 2016, Role: Co-PI, 200M KRW about 183K USD for my portion). This is a collaborative effort with the City of Ulsan (PI: Ulsan Economic Promotion Agency) and Daedo Techra, a local manufacturing company.

A New Efficient Method for Estimating the Partition Function of Exponential Random Graph Models! Paper, “A Deterministic Partition Function Approximation for Exponential Random Graph Models”, with Wen Pu (Linked In), Yunseong Hwang and Eyal Amir (University of Illinois) is accepted at the International Joint Conference on Artificial Intelligence 2015 (IJCAI-15) (April 2015).

New Machine Learning Algorithm that Monitors Memory Behaviors for Secure Embedded Systems! Paper, “Memory Heat Map: Anomaly Detection in Real-Time Embedded Systems Using Memory Behavior”, with Man-Ki Yoon, Sibin Mohan, and Lui Sha is accepted at the Design Automation Conference (DAC 2015). This research is a collaborative effort with Cyber Physical System Integration Lab at University of Illinois at Urbana-Champaign  (February 2015).

Slides for the Machine Learning Tutorial 2015, “Probabilistic Inference“, at Yonsei University in Seoul are now available,  (Download slides) (January 2015).

I serve on Programming Committee of AAAI 2015, IJCAI 2015, UAI 2015, ACML 2015 and StarAI (Statistical Relational AI) 2015 and Reviewer for NIPS 2015.

New dynamic Compressive Sensing models! Paper, “Learning Compressive Sensing Models for Big Spatio-Temporal Data” with Dongeun Lee is accepted at the 2015 SIAM International Conference on Data Mining (SDM 2015) (December 2014).

A new Korean National Research Foundation (NRF) grant is acknowledged (PI: Jaesik Choi, December 2014 ~ November 2017, 600M KRW about 557K USD). This is a collaborative effort with Dr. R. Vilim and Dr. Y-S Park at the Nuclear Division of the Argonne National Laboratory. The new research project, “Development of Fault-Diagnosis Algorithms for Current and Next-Generation Nuclear Systems”  is officially initiated. Many thanks, Korean NRF and US Department of Energy (DOE), and the selection committee!

The first paper (in the literature) on learning parameters in relational continuous probabilistic models! Paper, Learning Relational Kalman Filtering with Eyal Amir, Tianfan Xu and Albert Valocchi is accepted at 2015 AAAI Conference (November 2014).

A face detection algorithm robust on signal noises. Paper, Semi-Local Structure Patterns for Robust Face Detection with Kyungjoong Jeong and Gil-Jin Jag is accepted IEEE Signal Processing Letters (November 2014).

A new fast and efficient algorithm for big spatio-temporal sensor data archiving. Paper, Low Complexity Sensing for Big Spatio-Temporal Data with Dongeun Lee is accepted at 2014 IEEE Big Data Conference (September 2014).

Slides for tutorial, “Statistical Relational Learning for Big Data Analysis“, in the largest Korean computer conference, Korea Computer Congress 2014 is available. (June 2014) (Download slides).

Slides for the Machine Learning Tutorial 2014, “Statistical Inference with Graphical Models“, at Yonsei University in Seoul are now available (January 2014) (Download slides).

I serve on Programming Committee of AAAI 2014 and ICML 2014.

A fast linear-time Gaussian Process for online monitoring of the electricity market. Paper, “Fast Change Point Detection for Electricity Market Analysis” with William Gu, Ming Gu, Horst Simon, and Kesheng Wu is accepted at IEEE Big Data Workshop: Scalable Machine Learning: Theory and Applications (September 2013).

A new lifted inference algorithm for transitive relations (e.g., p(Friends(A,B) and Friends(B,C) → Friends(A,C)) = 0.3). Paper, “Lifted Inference on Transitive Relations with Wen Pu and Eyal Amir is accepted at AAAI-13 Workshop: Star AI(Statistical Relational AI) (July 2013).

As of July 29th, I joined the Ulsan National Institute of Science and Technology (UNIST) as an assistant professor in the School of Electrical and Computer Engineering. My research group, Probabilistic Artificial Intelligence Lab. (PAIL), currently has openings!

Machine Learning algorithms for accurate Groundwater Models! Paper, “Use of Machine Learning Methods to Reduce Predictive Error of Groundwater Models” with Tianfang Xu, Albert Valocchi and Eyal Amir is accepted at Groundwater (March 2013).

A new way of searching videos without tags! Paper, “A Spatio-Temporal Pyramid Matching for Video Retrieval” with Ziyu Wang, Sang-Chul Lee and Won J. Jeon is accepted at CVIU (February 2013).

Statistical Inference meets Real-Time Security! Paper, “SecureCore: A Multicore based Intrusion Detection Architecture for Real-time Embedded Systems” with Man-Ki Yoon, Sibin Mohan, Jung-Eun Kim and Lui Sha is accepted at RTAS 2013 (January 2013).

In January 2013, I joined the Lawrence Berkeley Lab as a postdoctoral fellow to solve machine learning problems with big data.

I serve on Programming Committee of IJCAI 2013AAAI 2013, and ICML 2013.

Research Interest

I am interested in Artificial Intelligence and Machine Learning. Specifically, I am interested in Efficient Inference with Large-Scale Probabilistic Graphical Models, Intelligent Hybrid (Cyber-Physical) Systems, Robot Task Planning and Multimedia Retrieval.

Download Research Statement: PDF


Download CV: PDF


Jaesik Choi, Lifted Inference for Relational Hybrid Models, Ph.D. Thesis, University of Illinois at Urbana-Champaign, Department of Computer Science, 2012 (pdf, slides).