Sitemap
A list of all the posts and pages found on the site. For you robots out there, there is an XML version available for digesting as well.
Pages
Posts
The role of the advisor and the mindset of the student
Published:
A complaint I hear often: my advisor doesn’t know my topic well enough to teach me anything. I think the word learn means something different in a PhD, and that changes the whole picture.
projects
Parameter-Dependent conditional Generative Adversarial Network (PDcGAN) Model for Multi-Phase Flow Prediction
Published:
We propose a parameter-dependent conditional generative adversarial network for predicting multi-phase flows. By conditioning the model on specific fuel parameters and input images, we accurately synthesize the resulting fuel morphology.
Improvements on Richardson-Extrapolation for Partial Differential Equations
Published:
We improved exsting numerical solver using Richardson Extrapolation for Wave equations such as Helmholtz equation and partial differential equations.
publications
Constrained Meta-Reinforcement Learning for Adaptable Safety Guarantee with Differentiable Convex Programming
Published in (AAAI-24) The Association for the Advancement of Artificial Intelligence, 2024
We propose a policy optimization framework that provides adaptable safety guarantees on unseen tasks by viewing constrained reinforcement learning through the lens of meta-learning.
Recommended citation: Cho, Minjae, and Chuangchuang Sun. "Constrained meta-reinforcement learning for adaptable safety guarantee with differentiable convex programming." Proceedings of the AAAI Conference on Artificial Intelligence. Vol. 38. No. 19. 2024.
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Hierarchical Meta-Reinforcement Learning via Automated Macro-Action Discovery
Published in Scientific Reports, 2024
We propose a macro-action discovery method and use it in a hierarchical algorithm for solving complex meta-RL problems.
Recommended citation: Cho, M., & Sun, C. (2026). "Hierarchical Meta-Reinforcement Learning via Automated Macro-Action Discovery." Scientific Reports. https://doi.org/10.1038/s41598-026-57247-1
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Out of Distribution Adaptation in Offline RL via Causal Normalizing Flows
Published in Mathematics: Statistics and Operational Research, 2025
We propose to learn transition dynamics and reward function using causal normalizing flow model for out-of-distribution adaptation of a policy.
Recommended citation: Cho, M., & Sun, C. (2025). "Out of Distribution Adaptation in Offline RL via Causal Normalizing Flows." Mathematics, 13(23), 3835.
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Intrinsic Reward Policy Optimization for Sparse-Reward Environments
Published in arXiv preprint arXiv:2601.21391, 2026
We propose Intrinsic Reward Policy Optimization (IRPO), a novel framework leveraging a surrogate policy gradient to overcome credit assignment and sample inefficiency in sparse-reward environments.
Recommended citation: Cho, M., & Tran, H. T. (2026). "Intrinsic Reward Policy Optimization for Sparse-Reward Environments." arXiv preprint arXiv:2601.21391.
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Sparsity-based Safety Conservatism for Constrained Offline Reinforcement Learning
Published in (AIAA-26) AIAA AVIATION Forum 2026, 2026
We propose to use K-Mean clustering algorithm to measure the sparsity of each data point and use those measures to overestimate the probable safety violation for safe deployment of a policy.
Recommended citation: Cho, Minjae, and Chuangchuang Sun. "Sparsity-based Safety Conservatism for Constrained Offline Reinforcement Learning." arXiv preprint arXiv:2407.13006 (2024).
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Contraction-Aware Reinforcement Learning for Nonlinear Control with Statistical Robustness
Published in IEEE Transactions on Robotics (T-RO), 2026
We propose contraction-aware reinforcement learning (CARL), which simultaneously learns control contraction metrics (CCMs) and optimizes a policy against rewards defined by those metrics, yielding stable and statistically robust path tracking for high-dimensional nonlinear systems.
Recommended citation: Cho, Minjae, Hiroyasu Tsukamoto, and Huy T. Tran. "Contraction-Aware Reinforcement Learning for Nonlinear Control with Statistical Robustness." IEEE Transactions on Robotics (2026), pp. 1-20. doi:10.1109/TRO.2026.3727138
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talks
Talk 1 on Relevant Topic in Your Field
Published:
This is a description of your talk, which is a markdown file that can be all markdown-ified like any other post. Yay markdown!
Tutorial 1 on Relevant Topic in Your Field
Published:
This is a description of your tutorial, note the different field in type. This is a markdown files that can be all markdown-ified like any other post. Yay markdown!
Talk 2 on Relevant Topic in Your Field
Published:
This is a description of your talk, which is a markdown files that can be all markdown-ified like any other post. Yay markdown!
Conference Proceeding talk 3 on Relevant Topic in Your Field
Published:
This is a description of your conference proceedings talk, note the different field in type. You can put anything in this field.
teaching
Physics II
TA, , 2023
Assisted in instruction for electromagnetism, optics, and modern physics. Managed supplemental intruction sessions for students.
Aerospace Dynamical Systems
TA, Department of Aerospace Engineering, 2025
Assisted in instruction for rigid body dynamics, orbital mechanics, and Lagrangian mechanics.
Aerospace Control Systems
TA, Department of Aerospace Engineering, 2025
Assisted in the instruction of classical control theory, state-space analysis, and stability for aerospace vehicles.
Aerospace Dynamical Systems
TA, Department of Aerospace Engineering, 2026
Assisted in instruction for rigid body dynamics, orbital mechanics, and Lagrangian mechanics.