Doyun Choi

My name is Doyun Choi, and I am a Ph.D student in the Data Artificial Intelligence (DAI) Lab at Seoul National University (SNU), advised by Prof. Jaemin Yoo. My Ph.D. research is supported by the AI Seoul Tech Research Support Program.

[Contact]

[Research Interest]

(Recommender Systems, Anomaly Detection, Knowledge Completion, ...)

(Distribution Shifts, Self-Interpretable Prediction, ...)

🧑‍🎓 Education

Ph.D Student (26.03 ~ )

M.S (24.02 ~ 26.02)

School : Korea Advanced Institute of Science and Technology (KAIST)
Dept : Electrical Engineering (EE)
Advisor : Prof. Jaemin Yoo
GPA : 4.07 / 4.3
Thesis : Advancing Graph Collaborative Filtering with Self-Supervised Data Augmentation and Social Network Information
- Based on accepted conference publications [C2], [C3]

B.S (18.03 ~ 24.02)

🎉 Graduated Summa Cum Laude (2nd / 92) 🎉

[C1] Parameter-Free Hypergraph Neural Network for Few-Shot Node Classification (NeurIPS 2025) (Paper, Code)
- Chaewoon Bae, Doyun Choi, Jaehyun Lee, Jaemin Yoo
[C2] Simple and Behavior-Driven Augmentation for Recommendation with Rich Collaborative Signals (IEEE BigData 2025) (Paper, Code)
- Doyun Choi, Cheonwoo Lee, Jaemin Yoo
[C3] PULSE: Socially-Aware User Representation Modeling Toward Parameter-Efficient Graph Collaborative Filtering (WWW 2026) (Paper, Code) (Oral)
- Doyun Choi*, Cheonwoo Lee*, Biniyam Aschalew Tolera, Taewook Ham, Chanyoung Park, Jaemin Yoo
- Top 9.4% (317 / 3370)
[C4] Generalizing Multi-Scale Time-Series Modeling with a Single Operator (ICML 2026) (Paper, Code)
- Cheonwoo Lee, Dooho Lee, Doyun Choi, Jaemin Yoo
[C5] Bounded Context Management for Tabular Foundation Models on Stream Learning (Arxiv '26) (Paper, Code)
- Jinmo Lee, Doyun Choi, Moongi Choi, Jaemin Yoo
- Revised version of [W2]

[W1] PULSE: Socially-Aware User Representation Modeling Toward Parameter-Efficient Graph Collaborative Filtering (DASFAA 2026 DI Workshop)
- Revised version of [C3]
[W2] Bounded Context Management for Tabular Foundation Models on Stream Learning (ICML 2026 FSDM Workshop) (Spotlight)
- Jinmo Lee, Doyun Choi, Moongi Choi, Jaemin Yoo
- Top 5% (8/178)

Gardener (Web Service for Home Gardening Community) (21.08 ~ 22. 08)
- Pirogramming (Alliance Programming Club for Undergraduate Students)
- Full Stack Developer (UI/UX Design, Front / Backend)
Enterprise Project: Automating Health Checkup Image Processing and Database Storage (22.07 ~ 22.09)
- Rexsoft

Enhancing Wafer Anomaly Detection and Quality Prediction Using Time-Series Fab Data (24.08 ~ 26.02)
- Samsung Electronics

Outstanding Admission Scholarship (2018)
Academic Merit Scholarship (All Semester)
- 2018-2, 2019-1, 2019-2, 2022-1, 2022-2, 2023-1, 2023-2
Outstanding Talent Scholarship in UOS (2022, 2023)
Boeing Scholarship (2022)
- Boeing Korea
Academic Excellence Scholarship (2022)
- Gwangju Seogu Scholarship Foundation
UOS Deep Learning Summer Bootcamp Competition - Project Director's Award (3rd) (2022)
Woonhae Foundation Scholarship (2023)
- SNT Woonhae Foundation
UOS Startup Hackathon Camp Winner (1st) (2023)
UOS Best Participation Award in Extracurricular Education Program (1st) (2023)
AI Seoul Tech Research Support Program (Doctoral degree) (2026)

[KAIST] - Teaching Assistants

[SNU] - Teaching Assistants

[External] - Teaching Assistants

AI Application Specialist - Understanding Data Model (Samsung Electronics) (2024 ~ )
- Give a Lecture on Recommender Systems & Time Series Practice
Anomaly Detection Seminar (Samsung Electronics DS)
- Give a Lecture on Tabular Anomaly Detection Practice

Auxiliary Police Officer, Hamyang Police Station (20.01~21.07)
- Completed Full Term of Service

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