KF KFI
KFI

Vol. 22, No. 1, 2025

Terbit
08 September 2026
Artikel
10 artikel
ISSN
1412-2960
e-ISSN
2579-521X

Daftar Isi

  1. Visualization and simulation of ZnO microstructure with various crystal structures and doping compositions based on XRD patterns using VESTA
    Dikri Aminnurdin, Ari Sulistyo Rini
    Hlm. 27-34 10.31258/jkfi.22.1.27-34
  2. Interpretation of groundwater potential based on the Cooper Jacobs method combined with Schlumberger geoelectricity in Simpang Tiga Village, Pekanbaru City
    Joko Kurniawan, Juandi Muhammad
    Hlm. 57-60 10.31258/jkfi.22.1.57-60
  3. The effect of reaction time and oil-to-methanol ratio on the calorific value of biodiesel produced from chicken fat oil
    Alltop Amri Ya Habib, Tengku Emrinaldi, Yogi Yolanda, Yelmida Azis
    Hlm. 11-14 10.31258/jkfi.22.1.11-14
  4. Effect of coagulation and filtration in slow sand filters on iron absorption in groundwater
    Ayu Cahyati, Krisman Krisman
    Hlm. 53-56 10.31258/jkfi.22.1.53-56
  5. Making supercapacitor carbon electrodes from lemongrass leaf biomass with variations in physical activation temperature
    Akmal Jaliaz, Awitdrus Awitdrus
    Hlm. 49-52 10.31258/jkfi.22.1.49-52
  6. The effect of variations in the size of milling balls on the magnetic properties and morphology of natural sand particles in the Rokan River
    Dini Afriyunita, Salomo Sinuraya, Erwin Amiruddin, Juandi Muhammad
    Hlm. 43-48 10.31258/jkfi.22.1.43-48
  7. Evaluation of the Arima-Kalman model in predicting rainfall in Medan City in 2023 using observation data from 2013 – 2022
    Alva Josia Lumbantoruan, Yahya Darmawan, Munawar Munawar, Nardi Nardi, Fendy Arifianto, Ervan Ferdiansyah
    Hlm. 15-22 10.31258/jkfi.22.1.15-22
  8. Volumetric-gravimetric synergy in biomass-derived carbon supercapacitors: A case study on dried banana leaf waste
    Apriwandi Apriwandi
    Hlm. 1-10 10.31258/jkfi.22.1.1-10
  9. Modification of magnetic properties and morphology of iron oxide particles of natural sand from Rokan River through copper doping and preparation using ball milling method
    Elika Gultom, Salomo Sinuraya, Erwin Amiruddin, Awitdrus Awitdrus
    Hlm. 35-42 10.31258/jkfi.22.1.35-42
  10. Empirical orthogonal functions (EOF) analysis of spatial patterns of dominant variability in the Indian Ocean
    Willy Bonanja Manik, Yahya Darmawan, Munawar Munawar, Nardi Nardi, Fendy Arifianto, Ervan Ferdiansyah
    Hlm. 23-26 10.31258/jkfi.22.1.23-26