Ihsan, Mahyus, Zahnur, Iftahul Fadlan, and Ikhsan Maulidi. 2026. “Hybrid Random forest–catboost Ensemble for Heart Disease Prediction on Imbalanced Datasets: Toward Applications in Military Health Systems”. International Journal of Applied Mathematics, Sciences, and Technology for National Defense 4 (1): 71-82. https://doi.org/10.58524/app.sci.def.v4i1.1148.