Research Interests

  • Recommendation Systems
  • Collaborative Filtering
  • Statistical Machine Learning


Google Scholar | DBLP
  1. Joonseok Lee, Samy Bengio, Seungyeon Kim, Guy Lebanon, Yoram Singer. Local Collaborative Ranking, Proceedings of the 23rd International World Wide Web Conference (WWW), 2014. Best Student Paper Award [pdf]
  2. Joonseok Lee, Seungyeon Kim, Guy Lebanon, Yoram Singer. Local Low-Rank Matrix Approximation, Proceedings of the 30th International Conference on Machine Learning (ICML), 2013. [pdf]
  3. Joonseok Lee, Seungyeon Kim, Guy Lebanon, Yoram Singer. Matrix Approximation under Local Low-Rank Assumption, The Learning Workshop in International Conference on Learning Representations (ICLR), 2013. [pdf]
  4. Joonseok Lee, Kisung Lee, Jennifer G. Kim. Personalized Academic Research Paper Recommendation System, ArXiv Report arXiv:1304.5457, 2013. [pdf]
  5. Mingxuan Sun, Fuxin Li, Joonseok Lee, Ke Zhou, Guy Lebanon, Hongyuan Zha. Learning Multiple-Question Decision Trees for Cold-Start Recommendation, Proceedings of the 6th ACM International Conference on Web Search and Data Mining (WSDM), 2013. [pdf]
  6. Joonseok Lee, Mingxuan Sun, Seungyeon Kim, Guy Lebanon. Automatic Feature Induction for Stagewise Collaborative Filtering, Advances in Neural Information Processing Systems (NIPS) 25, 2012. [pdf]
  7. Joonseok Lee, Mingxuan Sun, Guy Lebanon. PREA: Personalized Recommendation Algorithms Toolkit, Journal of Machine Learning Research (JMLR) 13:2699-2703, 2012. [pdf] [code]
  8. Joonseok Lee, Mingxuan Sun, Guy Lebanon. A Comparative Study of Collaborative Filtering Algorithms, ArXiv Report arXiv:1205.3193, 2012. [pdf]
  9. Joonseok Lee, Hanggjun Cho, Robert Ian (Bob) McKay. Rapid Screening of Keyboard Layouts, Proceedings of IEEE International Conference on Systems, Man, and Cybernetics (SMC), 2012. [pdf]
  10. Joonseok Lee, Robert Ian (Bob) McKay. Optimizing a Personalized Cellphone Keypad, Proceedings of the 5th International Conference on Convergence and Hybrid Information Technology (ICHIT), 2011. [pdf]
  11. Joonseok Lee. Merging Algorithm for Unified Communicator, Seoul National University (Bachelor's Thesis), 2009. [pdf]
  12. Kiyeon Lee, Joonseok Lee, Hyunwoong Shin, Sunghwan Kim, Jungwoo Choi. Real-Time Motion Tracking System using Omni-Directional PTZ Camera, Small and Medium Business Administration of South Korea, 2006. [pdf]

Talks and Presentations

Academic Activities

Ongoing Projects

  • Local Low-Rank Matrix Approximation
  • Graph-based Context-aware Entity Recommendation
  • Local Context Sparse Coding

Past Projects

Frequent Collaborators