Hyojeong Yun
M.S. Student · Graduate School of Artificial Intelligence (GSAI) · POSTECH
I am a master's student in the Data Systems Lab at POSTECH, advised by Prof. Wook-Shin Han. My research focuses on how vector embeddings behave in retrieval, and on designing retrieval systems around that behavior. Embeddings bring text, images, and video into a shared space and underpin everything from vector search to RAG, yet their behavior during retrieval remains underexplored.
I explore this across the retrieval stack, from cross-modal approximate nearest neighbor search in the systems layer to context engineering for multimodal RAG in the application layer (CANOPY). My goal is to build retrieval systems that account for both the strengths and the limits of embeddings.
News
- 2026.10
Our paper CANOPY, on adaptive-granularity evidence compression for multimodal RAG, is now on arXiv.
- 2024.09
Started my research journey under Prof. Wook-Shin Han at DS Lab @ POSTECH.
- 2024.05
A paper I worked on as a research intern was accepted to the 2024 IEEE Symposium on Security and Privacy (S&P).
Publications
- Preprint 2026
- S&P 2024
Experience
- 2026.04 – Present
Team Lead · Team Nutcrackers
Leading the development of Darami, an AI agent that guides people through public-service procedures for life events such as moving, childbirth, and leaving a job. Finalist in the AI Champion Competition hosted by Korea's Ministry of Science and ICT; received USD 4,000.
- 2024.09 – Present
Graduate Researcher · DS Lab @ POSTECH
- Conducted research on evidence compression for multimodal RAG, released on arXiv.
- Cross-modal approximate nearest neighbor search.
- 2023.02 – 2024.12
Frontend Developer · PoApper
Frontend development for POPO.
- 2022.02 – 2022.06
Student Research Intern · ML Lab @ POSTECH
Conducted research on machine unlearning, published at IEEE S&P 2024.
Teaching
- 2026.01 – Present
AI Specialist Training Program for Samsung Electronics
- 2025.09 – 2025.12
CSED226, Introduction to Data Analysis
- 2025.02 – 2025.06
CSED421, Database Systems
- 2022.02 – 2022.12
AIGS101, Introduction to Artificial Intelligence
Education
- 2024.09 – 2027.02 (Expected)
M.S., Graduate School of Artificial Intelligence (GSAI)
Pohang University of Science and Technology (POSTECH)
GPA 4.18 / 4.3
- 2020.02 – 2024.08
B.S. in Computer Science and Engineering
Pohang University of Science and Technology (POSTECH)
Cum Laude
Honors & Awards
- 2024.11
POSTECHIAN Fellowship (Creative) · POSTECH
Awarded to graduate students with outstanding admission records (USD 2,000).
- 2022.03
Global Leadership Program Scholar · CSE @ POSTECH
Awarded to outstanding students selected by a faculty committee (USD 2,000).