Subin Kim

Ph.D. Student, UPenn

kim34 [AT] engineering.upenn.edu

Tower of Babel in the 21st century

The Next Physical Wave

About

Hello! I am a second-year Ph.D. student at UPenn ESE, advised by professor Dinesh Jayaraman. I investigate the intersection of robotics and machine learning, designing sample-efficient algorithms for robotic learning. I completed both my bachelor's and master's degrees at KAIST (Korea Advanced Institute of Science and Technology).

Publications

* indicates equal contribution.

Words Are Not Motions: Steering Vision-Language-Action Models with Jacobian Pullbacks

{Subin Kim*, Qinhe Peng*}, Dinesh Jayaraman

SPAIS WS @ CoRL 2026

Awarded Robocurve Travel Grant @ SPAIS WS @ CoRL 2026 (Top 7.6%)

Contrastive Conceptor Activation Steering (COAST): Unlocking Vision-Language-Action Models through Hidden States

{Miranda Muqing Miao*, Subin Kim*}, Brandon Yang, Lyle Ungar

Mechanistic Interpretability WS @ ICML 2026

Zero-Shot VLA Adaptation with Retrieved Guidance

Subin Kim, Anh-Quan Pham, Dinesh Jayaraman

Under Review, 2026

A Smooth Sea Never Made a Skilled SAILOR:Robust Imitation via Learning to Search

{Arnav Kumar Jain*, Vibhakar Mohta*}, Subin Kim, Atiksh Bhardwaj, Juntao Ren, Yunhai Feng, Sanjiban Choudhury, Gokul Swamy

NeurIPS 2025 (Spotlight)

Dr. Strategy: Model-Based Generalist Agents with Strategic Dreaming

{Hany Hamed*, Subin Kim*}, Dongyeong Kim, Jaesik Yoon, Sungjin Ahn

ICML 2024

Playgrounds for abstraction and reasoning

Subin Kim, Prin Phunyaphibarn, Donghyun Ahn, Sundong Kim

nCSI WS @ NeurIPS 2022

Korea Software Congress (KSC) 2022 (Best Paper Award)

Domestic

Test Bed for Abstraction and Reasoning

Subin Kim, Prin Phunyaphibarn, Donghyun Ahn, Sundong Kim

Journal of KIISE, Vol. 51, No. 1, Jan 2024

Analysis of impact on Seoul traffic congestion by Land Use using travel speed and POI

Subin Kim, Sumin Han, Dongman Lee

Korea Software Congress (KSC) 2021

Research Experiences

Cornell PoRTaLIthaca, NY, U.S.

Research Intern(remote) Sep. 2024 - Feb. 2025, (onsite) Feb. 2025 - May. 2025

Advisor: Sanjiban Choudhury, Arnav Kumar Jain, Gokul Swamy

Hybrid training of Offline diffusion policy & online MBRL (NeurIPS 2025 Spotlight)

    • Investigate how the different image representation effects diffusion policy and world models.
    • Investigate how offline training with expert data can enhance the online learning through world models.
    • Implement MPPI planner (referred from TD-MPC) with n-step TD reward using the trained reward function and critic of the world model.
    • Skill: Pytorch, Docker, Singularity

    KAIST MLMLabDaejeon, Republic of Korea

    M.S.Mar. 2023 - Feb. 2025 (expected)

    Advisor: Sungjin Ahn

    Divide-and-conquer strategy for goal-conditioned MBRL agent (ICML 2024)

      KAIST DS Lab Daejeon, Republic of Korea

      Research InternJuly. 2022 - Jan. 2023

      Advisor: Sundong Kim, Meeyoung Cha

      Simplify & extend ARC for Research-optimized dataset (NeurIPS nCSIW 2022)
        • Built Mini-ARC that extends the original ARC dataset with restricted size.
        • Built O2ARC, which is an object-oriented web interface to solve & suggest Mini-ARC.
        • Hosted Happy ARC Day including over 40 participants to create and peer review Mini-ARC.
        • Published "Playgrounds for Abstraction and Reasoning" in nCSI WS @ NeurIPS 2022.
        • Published "Test Bed for Abstraction and Reasoning (Short version)" & Received Best Paper Award in KSC 2022.
        • Gave a poster presentation in nCSI WS @ NeurIPS & KSC 2022.
        • Skill: HTML, CSS, Javascript, Python, Flask, Django, ML

        KAIST DM LabSeoul, Republic of Korea

        Research InternDec. 2021 - June. 2022

        Advisor: Kijung Shin

        KAIST PROSYS LabDaejeon, Republic of Korea

        Research InternJune. 2021 - Sep. 2021

        Advisor: Kihong Heo

        "Tracer: Signature-based Static Analysis for Detecting Recurring Vulnerabilities"(Submitted to ICSE 2022)

          • 'Tracer' detects software vulnerabilities by exploiting existing vulnerability patterns.
          • Participated as a second author, implementing ML baselines and hunting bugs to use for training data.
          • Poster presentation for KAIST PL seminar (Host: Sukyoung Ryu)
          • This project was accepted to CCS 2022. However, I did not participate in the later process.
          • Skill: Python, C, C++, Pytorch, PL, ML

          KAIST CDSN LabDaejeon, Republic of Korea

          Research InternJan. 2021 - June. 2021

          Advisor: Sumin Han, Dongman Lee

          Teaching Experiences

          Deep Reinforcement Learning and Game AI Daejeon, Republic of Korea

          Teaching AssistantMarch. 2024 - June. 2024

          Best TA Award

          Hana Bank-KAIST Digital Warrior Program Daejeon, Republic of Korea

          TA of Computer Science ProjectMarch. 2022 - June. 2022

          TA of Data StructureOct. 2021 - Dec. 2021

          KAIST Korean for International Students Daejeon, Republic of Korea

          Teaching AssistantFeb. 2022 - Dec. 2022

          KAIST Korean Camp for International Students Daejeon, Republic of Korea

          Teaching AssistantJan. 2022 - Feb. 2022

          Academic Services

          Conference Reviewer

          International Conference on Learning Representations (ICLR)2027

          International Conference on Robotics and Automation (ICRA)2027

          Miscellaneous

          Google ExploreCSR Daejeon, Republic of Korea

          Workshop OrganizerSep. 2023 - Aug. 2024

          Certified as Korean Red Cross lifeguard Daejeon, Republic of Korea

          Jan. 2023 - Present

          KAIST swimming team KAORI Daejeon, Republic of Korea

          Senior memberJun. 2021 - Present

          50m Silver medal in women backstroke (Daejeon Masters)Jun. 2022

          50m Bronze medal in women freestyle (Daejeon Masters)Jun. 2022