Hi! or "Annyeonghaseyo!" I am a M.S. student in the Computer Science & Engineering Department at the Korea University and a member of Data Mining and Information Systems (DMIS) Lab, advised by Prof. Jaewoo Kang. I worked as an AI researcher at Nara-Information for seven months, and had an experience of Lab researcher in Song Lab (hosted by Prof. Sanghoun Song). Prior to my M.S. studies, I received a Bachelor's degree in Linguistics and Computer Science from Korea University.
My research area covers the broad field of natural language processing, with a focus on Post-Training, Mechanistic Interpretability, and Retrieval Augmented Generation. My goal is to broaden the interpretability approach to practical alignment problems such as Safety, Knowledge Editing, and Reasoning. I am also interested in domain-specific language models, including Biomedical LM.
You can find my CV in here.
[jɛin bɑk]
Selected Publications
-
[Under Review] Thinking Sparks!: Emergent Attention Heads in Reasoning Models During Post Training
Yein Park, Minbyul Jeong, Jaewoo Kang
[Under Review] ASGuard: Activation-Scaling Guard to Mitigate Targeted Jailbreaking Attack
Yein Park, Jungwoo Park, Jaewoo Kang
[IEEE BIBM 2025] CoTox: Chain-of-Thought-Based Molecular Toxicity Reasoning and Prediction
Jueon Park, Yein Park, Minju Song, Soyon Park, Donghyeon Lee, Seungheun Baek, Jaewoo Kang
[🥇1st Rank] DMIS Lab at MedHopQA-2025: Ensemble Multi-Retrieval Methodologies with Reasoning Language Model Decision
Jongmyung Jung†, Hyeongsoon Hwang†, Yein Park†, Minju Song, Jaehoon Yoon, Hyeon Hwang, Sanghoon Lee, Jiwoong Sohn, Jaewoo Kang
[EMNLP 2025 Findings] Assessing LLM Reasoning Steps via Principal Knowledge Grounding
Hyeon Hwang, Yewon Cho, Chanwoong Yoon, Yein Park, Minju Song, Kyungjae Lee, Gangwoo Kim, Jaewoo Kang
[ACL 2025] Does Time Have Its Place? Temporal Heads: Where Language Models Recall Time-specific Information
Yein Park, Chanwoong Yoon, Jungwoo Park, Minbyul Jeong, Jaewoo Kang
[ICLR 2025] ChroKnowledge: Unveiling Chronological Knowledge of Language Models in Multiple Domains
Yein Park, Chanwoong Yoon, Jungwoo Park, Donghyeon Lee, Minbyul Jeong, Jaewoo Kang
[NAACL 2025] Rationale-Guided Retrieval Augmented Generation for Medical Question Answering
Jiwoong Sohn, Yein Park, Chanwoong Yoon, Sihyeon Park, Hyeon Hwang, Mujeen Sung, Hyunjae Kim, Jaewoo Kang
Work Experience
AI Researcher Metaverse lab team
- Designed domain specific sLLM for local government
- Develped tour recommendation system combined with LLM by RAG method
- Assisted Korean curtural contents project using commercial AI systems.
Researcher Korean AI dataset team (host: Prof. Sanghoun Song)
- Joined Korean legal/bidomedical AI dataset project.
- Worked as crowdworker for legal data tagging and labelling.
Education
Data Mining & Information Systems Lab (advisor: Prof. Jaewoo Kang)
(advisor: Prof. Seok-Hoon You)
Projects
- Temporal Alignment through Chronosemanticity.
- Supported to research on knowledge distillation method. - Utilize Knowledge Hierarchy.
- Developed Korean local tour recommendation system combined with LLM by RAG methods.
- Designed pipeline of recommendation using personalized tour data, with efficient ML methods.
- [Available GPTs ver]
- [link to the post]
- Developed sLLM specialized to administrative and civil affairs works for local government's officers.
- Developed summarization and search agents among the entire LLM pipeline.
- [link to the post]
Honors and Scholarships
Academic Activities
- The 2025 Conference on Empirical Methods in Natural Language Processing
- Participated as a secondary reviewer
- The 63rd Annual Meeting of the Association for Computational Linguistics
- Participated as a secondary reviewer