Sihwa Park (they/them)

I'm a PhD student in Computer Science at Cornell University, advised by Alexander Terenin and David Bindel.

I work on Bayesian optimization and like to see it as a framework for decision-making under uncertainty. I'm also into using Bayesian inference in different scientific domains.

Before Cornell, I did my undergrad and masters at Korea University in Seoul, South Korea, advised by Seungjun Baek.

Email: sihwapark[at]cs[dot]cornell[dot]edu

Sihwa Park

News

Sep 24, 2026 A new paper got accepted to NeurIPS 2026!

Projects

Optimized stellarator surface colored by magnetic field strength Bayesian Optimization for Alpha-particle Confinement in Stellarators
Uses constrained Bayesian optimization to search for stellarator magnetic configurations that better confine alpha particles, directly optimizing a confinement measure computed from GPU-accelerated particle-tracing simulation.
Prior-fitted diffusion transformer pipeline: synthetic data from a function prior, self- and cross-attention, flow matching to sample the maximizer Thompson Sampling using Prior-fitted Diffusion Transformers
Uses diffusion transformers that perform Thompson sampling in-context at inference time after pre-training on functions drawn from a prior. Introduces practical non-Gaussian priors that can overcome limitations of Gaussian processes.
Hypervolume Pandora's Box problem: boxes with two-objective values and costs Cost-aware Multi-objective Bayesian Optimization via Gittins Indices
Generalizes Pandora’s Box Gittins Index framework to multi-objective and cost-aware settings, studies the optimality of index-based policies in multi-objective decision problems, and proposed Gittins index–based multi-objective methods.

Publications

Thompson Sampling using Prior-fitted Diffusion Transformers
S. Park*, J. Zhu*, V. Jain, S.-Y. Chou, A. Terenin
NeurIPS 2026
NeBLa: Neural Beer-Lambert for 3D Reconstruction of Oral Structures from Panoramic Radiographs
S. Park, S. Kim, D. Kwon, Y. Jang, I.-S. Song, S. Baek
AAAI 2024
arXiv
3D Teeth Reconstruction from Panoramic Radiographs using Neural Implicit Functions
S. Park, S. Kim, I.-S. Song, S. Baek
MICCAI 2023  ยท  top 14%
arXiv

Design adapted from Jon Barron.