Search Results for author: Chanwoo Park

Found 10 papers, 3 papers with code

A Demonstration of Adaptive Collaboration of Large Language Models for Medical Decision-Making

1 code implementation31 Oct 2024 Yubin Kim, Chanwoo Park, Hyewon Jeong, Cristina Grau-Vilchez, Yik Siu Chan, Xuhai Xu, Daniel McDuff, Hyeonhoon Lee, Cynthia Breazeal, Hae Won Park

Medical Decision-Making (MDM) is a multi-faceted process that requires clinicians to assess complex multi-modal patient data patient, often collaboratively.

Decision Making

A Hypothesis on Black Swan in Unchanging Environments

no code implementations25 Jul 2024 Hyunin Lee, Chanwoo Park, David Abel, Ming Jin

Black swan events are statistically rare occurrences that carry extremely high risks.

RLHF from Heterogeneous Feedback via Personalization and Preference Aggregation

no code implementations30 Apr 2024 Chanwoo Park, Mingyang Liu, Dingwen Kong, Kaiqing Zhang, Asuman Ozdaglar

We propose two approaches based on reward and preference aggregation, respectively: the former utilizes both utilitarianism and Leximin approaches to aggregate individual reward models, with sample complexity guarantees; the latter directly aggregates the human feedback in the form of probabilistic opinions.

Representation Learning

MDAgents: An Adaptive Collaboration of LLMs for Medical Decision-Making

1 code implementation22 Apr 2024 Yubin Kim, Chanwoo Park, Hyewon Jeong, Yik Siu Chan, Xuhai Xu, Daniel McDuff, Hyeonhoon Lee, Marzyeh Ghassemi, Cynthia Breazeal, Hae Won Park

MDAgents achieved the best performance in seven out of ten benchmarks on tasks requiring an understanding of medical knowledge and multi-modal reasoning, showing a significant improvement of up to 4. 2% (p < 0. 05) compared to previous methods' best performances.

Decision Making Medical Diagnosis +1

Do LLM Agents Have Regret? A Case Study in Online Learning and Games

no code implementations25 Mar 2024 Chanwoo Park, Xiangyu Liu, Asuman Ozdaglar, Kaiqing Zhang

To better understand the limits of LLM agents in these interactive environments, we propose to study their interactions in benchmark decision-making settings in online learning and game theory, through the performance metric of \emph{regret}.

Decision Making

Multi-Player Zero-Sum Markov Games with Networked Separable Interactions

no code implementations NeurIPS 2023 Chanwoo Park, Kaiqing Zhang, Asuman Ozdaglar

We study a new class of Markov games, \emph(multi-player) zero-sum Markov Games} with \emph{Networked separable interactions} (zero-sum NMGs), to model the local interaction structure in non-cooperative multi-agent sequential decision-making.

Decision Making Sequential Decision Making

A Unified Analysis of Mixed Sample Data Augmentation: A Loss Function Perspective

1 code implementation21 Aug 2022 Chanwoo Park, Sangdoo Yun, Sanghyuk Chun

Our theoretical results show that regardless of the choice of the mixing strategy, MSDA behaves as a pixel-level regularization of the underlying training loss and a regularization of the first layer parameters.

Adversarial Robustness Data Augmentation

REST: Performance Improvement of a Black Box Model via RL-based Spatial Transformation

no code implementations16 Feb 2020 Jae Myung Kim, Hyungjin Kim, Chanwoo Park, Jungwoo Lee

Our work aims to improve the robustness by adding a REST module in front of any black boxes and training only the REST module without retraining the original black box model in an end-to-end manner, i. e. we try to convert the real-world data into training distribution which the performance of the black-box model is best suited for.

Sampling-based Bayesian Inference with gradient uncertainty

no code implementations8 Dec 2018 Chanwoo Park, Jae Myung Kim, Seok Hyeon Ha, Jungwoo Lee

In this paper, we show that predictive uncertainty can be efficiently estimated when we incorporate the concept of gradients uncertainty into posterior sampling.

Bayesian Inference

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