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Jeongwhan Choi (최정환)

Ph.D. Candidate

BigDyL (Big Data Analytics Lab)

Dept. of Artificial Intelligence, School of Computing, College of Computing, Yonsei University 

Email: jeongwhan.choi@yonsei.ac.kr

CV / CV of Failure / Google Scholar / Semantic Scholar / GitHub  / X / LinkedIn / BlueSky / ResearchGate  / ORCID / DBLP / Medium 

About

I am a Ph.D. candidate at Yonsei University, currently conducting research at KAIST, where I relocated in February 2024 to continue working with my advisor, Prof. Noseong Park. My research interests span various areas, including graph neural networks, recommender systems, spatio-temporal forecasting, differential equations, and Transformers. I have published multiple papers in prestigious venues including NeurIPS, ICML, ICLR, AAAI, IJCAI, CIKM, WSDM, SIGIR, WSDM, and ICDM. My research has been recognized through the Qualcomm Innovation Fellowship, and I have received Top Reviewer Awards at both NeurIPS 2024, LoG 2024, and KDD 2025. I will be serving as Web Chair for the upcoming CIKM 2025.

I work on developing advanced AI models with a focus on three main areas: (1) Graph Neural Networks & Differential Equations, (2) Recommender Systems & Collaborative Filtering, and (3) Spatiotemporal Forecasting & Applications.

I received my B.S. in Software Engineering from Jeonbuk National University (2016-2020) with Magna Cum Laude honors. During this time, I had the opportunity to be advised by Prof. Suntae Kim and Prof. Duksan Ryu.

What's New

  • 🛜 May 5, 2025 I will be served as a Web Chair for Learning on Graph (LoG) conference!

  • ✌️ Apr 29, 2025 "Learning Advanced Self-Attention for Linear Transformers in the Singular Value Domain" was accepted in IJCAI 2025!

  • ✍️ Apr 8, 2025 I am invited to be a PC member for ECAI 2025.

  • 🛜 Mar 3, 2025 I am invited to be a Web Chair for CIKM 2025!

  • 🔝 Mar 2, 2025 "Paper Digest - Most Influential AAAI Papers (2025-03 Version)" announced that our paper, "Graph Neural Controlled Differential Equations for Traffic Forecasting", ranked 13rd among the most influential papers at AAAI 2022.

  • 🪖 Feb 27, 2025 As a Ph.D. technical research personnel, I completed a military training program in February!

  • ✍️ Feb 17, 2025 I am invited to be a reviewer for NeurIPS 2025.

  • ✍️ Jan 25, 2025 I am invited to be a reviewer for Transactions on Machine Learning Research (TMLR).

  • 🕸️ Jan 23, 2025 "PIORF: Physics-Informed Ollivier-Ricci Flow for Long–Range Interactions in Mesh Graph Neural Networks" was accepted in ICLR 2025!

  • 🕵️ Jan 13, 2025 "FraudCenGCL: Enhancing Fraud Detection via Dual-View Graph Contrastive Learning with Account Centrality Features" was accepted for Social Impact: Bridging Innovations in Finance, Social Media, and Crime Prevention  Workshop at AAAI 2025.

  • 🏆 Jan 8, 2025 I am delighted to have received the "Merit Academic Paper Award" from Yonsei University for his research "PANDA: Expanded Width-Aware Message Passing Beyond Rewiring", which was presented at ICML 2024.

 🔙 What's Not New

Selected Publications (See all)

  • Jeongwhan Choi*, Hyowon Wi*, Jayoung Kim, Yehjin Shin, Kookjin Lee, Nathaniel Trask, and Noseong Park, "Graph Convolutions Enrich the Self-Attention in Transformers!",  In Conference on Neural Information Processing Systems (NeurIPS), 2024. 

  • Jeongwhan Choi, Sumin Park, Hyowon Wi,  Sung-Bae Cho, and Noseong Park, "PANDA: Expanded Width-Aware Message Passing Beyond Rewiring", ICML, 2024.

  • Jeongwhan Choi and Noseong Park, "Graph Neural Rough Differential Equations for Traffic Forecasting", ACM Transactions on Intelligent Systems and Technology (TIST), 2023.

  • Jeongwhan Choi, Seoyoung Hong, Noseong Park, and Sung-Bae Cho, "GREAD: Graph Reaction-Diffusion Networks," ICML 2023.

  • Jeongwhan Choi, Seoyoung Hong, Noseong Park, and Sung-Bae Cho, "Blurring-Sharpening Process Models for Collaborative Filtering," SIGIR 2023.

  • Jeongwhan Choi, Hwangyong Choi, Jeehyun Hwang, and Noseong Park, "Graph Neural Controlled Differential Equations for Traffic Forecasting," AAAI 2022. 

  • Jeehyun Hwang, Jeongwhan Choi, Hwangyong Choi, Kookjin Lee, Dongeun Lee, and Noseong Park, "Climate Modeling with Neural Diffusion Equations", ICDM 2021.

  • Jeongwhan Choi, Jinsung Jeon, and Noseong Park,  "LT-OCF: Learnable-Time ODE-based Collaborative Filtering", CIKM 2021.

Research Experience

  • Sep 2020 – Present, Graduate Student Researcher, BigDyL (Big Data Analytics Lab) (Advisor: Prof. Noseong Park)

  • Jan 2020 – Sep 2020, Undergraduate Student Researcher, AI & SE Lab (Advisor: Prof. Duksan Ryu)

  • Nov 2018 – Dec 2019, Undergraduate Student Researcher, Systems & Software Engineering Lab (Advisor: Prof. Suntae Kim)

Awards & Scholarships

  • Feb 2025, Merit Academic Paper Award, Yonsei University (Runner-up paper in Dept. of Artificial Intelligence) [link]

  • Dec 2024, Outstanding Reviewer (Top 10%), KDD 2025 (August Cycle).

  • Dec 2024, Qualcomm Innovation Fellowship Award (4M KRW, approx. 2.8K USD), Qualcomm Technologies Inc. [link]

  • Nov 2024, Top Reviewer Award, LoG 2024. [link]

  • Nov 2024, Top Reviewer Award, NeurIPS 2024. [link]

  • Oct, 2024, Excellence Award (First Prize), Korea Financial Telecommunications & Clearings Institute. [link]

  • Oct 2024, Qualcomm Innovation Fellowship Finalist Award, Qualcomm Technologies Inc. [link]

  • Jul 2024, Merit Academic Paper Award, Yonsei University (Runner-up paper in Dept. of Artificial Intelligence) [link]

  • Jan 2024, Best Paper Award, Yonsei University (Best paper in Dept. of Artificial Intelligence) [link]

  • May 2023, Graduate Student Research Assistantship (GSRA) Scholarship, Yonsei University

  • Jan 2023, Academic Research Fellowship (ARF), Brain Korea 21 (BK21) Program, Yonsei University

  • Nov 2022, Graduate Student Research Assistantship (GSRA) Scholarship, Yonsei University

  • Sep 2022, Academic Research Fellowship (ARF), Brain Korea 21 (BK21) Program, Yonsei University

  • Jul 2022, Best Paper Award, Yonsei University (Best paper in Dept. of Artificial Intelligence) [link]

  • Apr 2022, Graduate Student Research Assistantship (GSRA) Scholarship, Yonsei University

  • Feb 2021, Best Paper Award, the 23rd Korea Conference on Software Engineering (KCSE 2021)

  • Jun 2019, Best Paper Award, Korean Institute of Information Technology

  • Mar 2018 – Dec 2019, National Scholarship for Science and Engineering, KOSAF (Korea Student Aid Foundation)

    • Full tuition exemptions for 8 semesters.

Talks

  • Dec 2023, Talk on Top-conference session,  Korea Software Congress (KSC 2023)

  • Jun 2023, Talk on 1st Seminar held by Graph User Group (GUG).

  • Jun 2023, Talk on Top-conference session,  Korea Computer Congress (KCC 2023)

  • Feb 2023, Talk on 2023 KSIAM AI Winter School held by Korean Society for Industrial and Applied Mathematics (KSIAM). [Slides]

  • Oct 2022, Talk on 1st Workshop on AI held by Yonsei Univ. [Slides][Poster]

  • Aug 2022, Poster presentation for AIGS Symposium 2022 held at the COEX Grand Ballroom. [Poster]

  • Jul 2022, Invited talk on Top-conference session,  Korea Computer Congress (KCC 2022) [Slides]

  • Nov 2021, "Graph-based Collaborative Filtering and Neural ODEs", Korean Artificial Intelligence Association (KAIA) | LG AI Research, (This talk is part of a tutorial called "Deep Learning Inspired by Differential Equation". ) [Slides]

Academic Services

Conference Organizer

  • Web Chair: CIKM 2025, LoG 2025

Reviewer or Program Committee Member for Conference

  • ECAI 2025

  • SIGIR 2025

  • ICLR 2025

  • AISTATS 2025

  • NeurIPS 2024 (Top Reviewer Award), 2025

  • AAAI 2024, 2025

  • IJCAI 2024, 2025

  • WSDM 2025

  • CIKM 2024, 2025

  • SDM 2024

  • KDD 2023, 2024, 2025 August Track (Outstanding Reviewer), 2025 February Track

  • LoG 2022, 2023, 2024 (Top Reviewer Award)

  • ICDM 2021, 2022

  • NeurIPS 2024 Workshop ML4PS

  • AI4TS workshop at AAAI 2025 and AI4TS workshop at SDM 2025

  • AAAI 2024 Workshop, 4th Workshop on Graphs and More Complex Structures for Learning and Reasoning (GCLR)

Reviewer for Journal

  • Transactions on Machine Learning Research (TMLR) 2025 (2 times)

  • Knowledge-Based Systems 2025

  • Applied Economics Letters 2024

  • Neurocomputing 2024 (2 times)

  • IEEE Transactions on Image Processing (TIP) 2024

  • IEEE Transactions on Knowledge and Data Engineering (TKDE) 2023, 2024 (2 times)

  • Journal of Intelligent & Fuzzy Systems 2024

  • Applied Soft Computing 2024, 2025 (13 times)

  • Applied Artificial Intelligence 2023 (2 times)

  • IEEE Transactions on Intelligent Transportation Systems (TIST) 2022, 2025 (2 times)

Jeongwhan Choi, jeongwhan.choi@yonsei.ac.kr
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