Sangwon (Justin) Hyun

Post-doctoral Researcher
Department of Data Sciences and Operations
University of Southern California
CV / Github / Google Scholar

I'm a post-doc working with Jacob Bien. My current focus is statistical analysis and modeling of ocean data, as part of the CBIOMES initiative of the Simons Foundation.

I've also worked on infectious disease modeling and forecasting, and contributed to the COVID19 response effort by the DELPHI group.

I'll be joining UC Santa Cruz statistics as a faculty member in the fall!

Favorite quote
From The Universe and the Teacup by K.C. Cole:
"So the improved Newtonion Universe must cease and grow cold," says Thomasina's tutor Septimus in Stoppard's Arcadia, suddenly realizing the import of his student's mathematical discovery that disorder is the inevitable direction of things. "Dear me."
"Yes," Thomasina replies, "we must hurry if we are going to dance."


My research interests include oceanographic data analysis, epidemiological modeling/forecasting, changepoint detection, and selective inference.

Ocean data analysis

Ocean Mover’s Distance: Using Optimal Transport for Analyzing Oceanographic Data
Sangwon Hyun, Aditya Mishra, Christopher L. Follett Bror Jonsson, Gemma Kulk, Gael Forget, Marie-Fanny Racault, Thomas Jackson, Stephanie Dutkiewic, Christian L. Müller, and Jacob Bien
To appear, Proceedings of the Royal Society A (2022)

Density-based Approaches to Evaluate Biogeochemical Models by Satellite Derived Chlorophyll
Bror F. Jönsson, Christopher L. Follett, Jacob Bien, Stephanie Dutkiewicz, Sangwon Hyun, Gemma Kulk, Gael Forget, Christian L. Müller, Marie-Fanny Racault, Christopher N. Hill, Thomas Jackson, Shubha Sathyendranath
In revision with AGU Biogeochemical Cycles (2021)

A Flexible Bayesian Approach to Estimating Size-structured Matrix Population Models
Kristof Glauninger, Jann Paul Mattern, Greg Britten, John Casey, Sangwon Hyun, Zhen Wu, E. Virginia Armbrust, Zaid Harchaoui, François Ribalet
PLOS Computational Biology (2021)

Modeling Cell Populations Measured By Flow Cytometry With Covariates Using Sparse Mixture of Regressions
Sangwon Hyun, Mattias Rolf Cape, François Ribalet, Jacob Bien
To appear, Annals of Applied Statistics (2022)

Changepoint detection and selective inference

Post-selection Inference for Changepoint Detection Algorithms with Application to Copy Number Variation Data
Sangwon Hyun, Kevin Lin, Max G'Sell, Ryan Tibshirani
Biometrics (2020)

Exact Post-Selection Inference for the Generalized Lasso Path
Sangwon Hyun, Max G'Sell, Ryan Tibshirani
Electronic Journal of Statistics (2018)

Infectious disease modeling and forecasting

An Open Repository of Real-Time COVID-19 Indicators
Various authors
PNAS (2021)

Can Auxiliary Indicators Improve COVID-19 Forecasting and Hotspot Prediction?
Daniel J. McDonald, Jacob Bien, Alden Green, Addison J. Hu, Nat DeFries, Sangwon Hyun, Natalia L. Oliveira, James Sharpnack, Jingjing Tang, Robert Tibshirani, Valérie Ventura, Larry Wasserman, Ryan Tibshirani
PNAS (2021)

Nonmechanistic Forecasts of Seasonal Influenza with Iterative One-week-ahead Distributions
Logan Brooks, David Farrow, Sangwon Hyun, Ryan Tibshirani, Roni Rosenfeld
PLOS Computational Biology (2018)

A Human Judgment Approach to Epidemiological Forecasting
David Farrow, Logan Brooks, Sangwon Hyun, Ryan Tibshirani, Donald S. Burke
PLOS Computational Biology (2017)

Flexible Modeling of Epidemics with an Empirical Bayes Framework
Logan Brooks, David Farrow, Sangwon Hyun, Ryan Tibshirani, Roni Rosenfeld
PLOS Computational Biology (2015)

Risk of Dengue for Tourists and Teams during the World Cup 2014 in Brazil
Wilbert Van Panhuis, Sangwon Hyun, Kayleigh Blaney, Ernesto T. A. Marques Jr, Giovanini E. Coelho, João Bosco Siqueira Jr, Ryan Tibshirani, Jarbas B. da Silva Jr, Roni Rosenfeld
PLOS Neglected Tropical Diseases (2014)

Ongoing work

Environmental Drivers of Marine Cell Populations Measured by Flow Cytometry
Sangwon Hyun, Timothy Coleman, Francois Ribalet, Jacob Bien

Trend Filtering for Mixture Analysis of Flow Cytometry
Timothy Coleman, Sangwon Hyun, Francois Ribalet, Jacob Bien

Using Aspect Bernoulli Matrix Decomposition for Analyzing Metagenomic Data from the Ocean
Ryan Reynolds, Sangwon Hyun, Naomi Levine, Jacob Bien

Colloborative publications

Collaborative efforts to forecast seasonal influenza in the United States, 2015–2016
Various authors
Scientific Reports (2019)

Results from the Second Year of a Collaborative Effort to Forecast Influenza Seasons in the United States
Various authors
Epidemics (2018)

An Open Challenge to Advance Probabilistic Forecasting for Dengue Epidemics
Various authors
Proceedings of the National Academy of Sciences (2019)


I enjoy playing games that involve bouncy spheres, hiking, bicycling, weightlifting, reading books, and cooking.
I'm an avid novice user of Emacs and Org mode.
Fun fact: I served 2 years in the military at the Joint Security Area located between North and South Korea.

Author: Sangwon Hyun

Created: 2022-06-02 Thu 17:29