Author

Hyeon-Uk Lee

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Open access Oct 2026

Machine Learning Prediction of Early ICU-to-Ward Transfer in Patients with Sepsis: Development, External Validation, and Retrospective Cohort Study

Early identification of patients likely to undergo ICU-to-ward transfer may inform transfer planning in sepsis. We developed LightGBM models using first 24 h ICU data from MIMIC-IV and evaluated them in a temporal internal test set and eICU-CRD. In MIMIC-IV, eligible patients met Sepsis-3 criteria by 24 h and remained...

N. Ha, Hyeon-Uk Lee, Chan Kyeol Kim et al. · Hospitals · 0 citations

Open access 2026

Coverage-Aware Guidance for Novelty-Driven Exploration in Automated Game Testing Under Sparse-Reward 3-D Environments

Results indicate that geometric coverage strongly influences eventual fault breadth in the fixed Arena and that Full CAE’s clearest additional contribution is sustained late-stage discovery through stagnation recovery, which may support reliability validation in complex disaster-response simulations.

Tae-Hyeon Jang, Hyeon-Uk Lee, Hyunseok Kim · IEEE Access · 0 citations