Maulana, Ilham, and Nita Merlina. 2026. “ARRHYTHMIA DETECTION FROM IMBALANCED ECG DATA USING CNN, FOCAL LOSS, AND RR INTERVAL FEATURES WITH INTER-PATIENT EVALUATION”. Jurnal Riset Informatika 8 (4):591-600. https://doi.org/10.34288/jri.v8i4.514.