Joowan Chae

I am an undergraduate student at Sungkyunkwan University interested in language models, retrieval-augmented generation, preference optimization,autonomous data agents. I use this blog to organize paper reviews, math notes, and implementation-oriented study logs.

Research Interests

  • Retrieval-augmented generation and semantic search
  • Reasoning agents for structured data analysis
  • Embedding models and contrastive learning
  • LLM alignment and preference optimization
  • Reinforcement Learning
  • Multimodal reasoning for planning and control
  • Vision-Language-Action (VLA) models and embodied AI

Currently Studying About

  • Foundation model architectures and pre-training
  • LLM reasoning, ReAct-style workflows, and verification
  • Machine learning fundamentals and mathematical intuition
  • Course notes from operating systems, networks, and ML

Recent Posts

SimPO Simple Preference Optimization with a Reference-Free Reward 리뷰

11 minute read

Background LLM을 사람의 의도와 align하기 위해서는 human feedback을 학습하는 것이 매우 중요하다. RLHF는 human feedback을 사용하는 성능이 뛰어난 강화학습 방법이다. 하지만 reward model을 학습하고, 그 reward을 최대화하는 ...

Let’s Verify Step by Step 리뷰

11 minute read

Background LLM은 현재 뛰어난 추론 능력을 가지지만 여전히 hallucination으로 인한 오류가 빈번하다. Hallucination은 특히 multi-step reasoning이 요구되는 영역에서 취약하다. Reasoning 과정에서 하나의 논리적 오류가 발생한다면...