?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=LEFI&rft.aufirst=NADIA+MARTHA&rft.au=LEFI%2C+NADIA+MARTHA&rft.degree=S1+-+Sarjana&rft.title=%7BJALUR+SCIENTIST%7D+ANALISIS+OPTIMASI+HYPERPARAMETER+DAN+FEATURE+SELECTION+PADA+MODEL+XGBOOST+UNTUK+PREDIKSI+INFEKSI+HEPATITIS+C&rft.inst=Universitas+AMIKOM+Yogyakarta&rft.date=December+2025