activity
20232026
most citedClass-Imbalanced Graph Learning without Class Rebalancing

2 citations · 4 across the 9 of their papers we have counts for

collaborators

10 papers

cs.IR2026

TRACER: Balancing Stability-Plasticity-Cognitivity Trilemma for LLM Enhanced Continual Recommendation

WooJoo Kim, HyunSik Yoo, JunYoung Kim +3

Continual recommendation aims to capture evolving user interests from streaming data but struggles with sparsity. LLM enhancers mitigate this with semantic knowledge, but naive int…

cs.AI2026

Beyond Observed Auxiliary Relations: Environment-Conditioned Modeling for Multi-Behavior Recommendation

Seunghan Lee, Hyunsik Yoo, Jian Kang +2

Multi-behavior recommendation (MBR) leverages auxiliary behavioral signals, such as clicks and add-to-cart, to enhance target behavior prediction like purchases. While recent graph…

cs.LG2026

ReMix: Reinforcement routing for mixtures of LoRAs in LLM finetuning

Ruizhong Qiu, Hanqing Zeng, Yinglong Xia +15

Low-rank adapters (LoRAs) are a parameter-efficient finetuning technique that injects trainable low-rank matrices into pretrained models to adapt them to new tasks. Mixture-of-LoRA…

cs.IR2026

Mixture of Sequence: Theme-Aware Mixture-of-Experts for Long-Sequence Recommendation

Xiao Lin, Zhicheng Tang, Weilin Cong +14

Sequential recommendation has rapidly advanced in click-through rate prediction due to its ability to model dynamic user interests. A key challenge, however, lies in modeling long…

cs.LG2025

Continual Low-Rank Adapters for LLM-based Generative Recommender Systems

Hyunsik Yoo, Ting-Wei Li, SeongKu Kang +4

While large language models (LLMs) achieve strong performance in recommendation, they face challenges in continual learning as users, items, and user preferences evolve over time.…

cs.IR2025

Continual Recommender Systems

Hyunsik Yoo, SeongKu Kang, Hanghang Tong

Modern recommender systems operate in uniquely dynamic settings: user interests, item pools, and popularity trends shift continuously, and models must adapt in real time without fo…

cs.IR2025

Capturing User Interests from Data Streams for Continual Sequential Recommendation

Gyuseok Lee, Hyunsik Yoo, Junyoung Hwang +2

Transformer-based sequential recommendation (SR) models excel at modeling long-range dependencies in user behavior via self-attention. However, updating them with continuously arri…

cs.CR2024★ 1 cited

WAPITI: A Watermark for Finetuned Open-Source LLMs

Lingjie Chen, Ruizhong Qiu, Siyu Yuan +6

Watermarking of large language models (LLMs) generation embeds an imperceptible statistical pattern within texts, making it algorithmically detectable. Watermarking is a promising…

cs.IR2023★ 1 cited

Ensuring User-side Fairness in Dynamic Recommender Systems

Hyunsik Yoo, Zhichen Zeng, Jian Kang +7

User-side group fairness is crucial for modern recommender systems, aiming to alleviate performance disparities among user groups defined by sensitive attributes like gender, race,…

cs.LG2023★ 2 cited

Class-Imbalanced Graph Learning without Class Rebalancing

Zhining Liu, Ruizhong Qiu, Zhichen Zeng +7

Class imbalance is prevalent in real-world node classification tasks and poses great challenges for graph learning models. Most existing studies are rooted in a class-rebalancing (…