The DC Motor Speed Controller Using AT89S52 Microcontroller to Rotate Stepper Motor Attached into Potentiometer in Variable Regulated Power Supply

by Marhaposan Situmorang
Published 2011-06-01

Measurement and Analysis of Output Radiation Dose on X-Ray Device over 10 Years at Hospitals in Medan City

by Herty Afrina Sianturi, Martha Rianna, Timbangen Sembiring, Marhaposan Situmorang
Published 2018-01-01

Design of solar power system for the new mini region of broadband seismometer shelter in Tiganderket, Karo, North Sumatera, Indonesia

by Marzuki Sinambela, Marhaposan Situmorang, Kerista Tarigan, Syahrul Humaidi, Teguh Rahayu
Published 2020-12-01

COMPARISON OF ENERGY DOSES 10 MV DISTRIBUTION USING PERCENTAGE DEPTH DOSE (PDD) METHOD ON LINAC: ELECTA AND SIEMENS

by Martha Rianna, Herty Afrina Sianturi, Hariyati Lubis, Awan Pelawi, Timbangen Sembiring, Marhaposan Situmorang
Published 2018-06-01

Effect of calcination temperature on Microstructures, magnetic properties, and microwave absorption on BaFe11.6Mg0.2Al0.2O19 synthesized from natural iron sand

by Martha Rianna, Timbangen Sembiring, Marhaposan Situmorang, Candra Kurniawan, Anggito P. Tetuko, Eko Arief Setiadi, Ignu Priyadi, Masno Ginting, Perdamean Sebayang
Published 2019-03-01

CHARACTERIZATION OF NATURAL IRON SAND FROM KATA BEACH, WEST SUMATRA WITH HIGH ENERGY MILLING (HEM)

by Martha Rianna, Timbangen Sembiring, Marhaposan Situmorang, Candra Kurniawan, Eko Arief Setiadi, Anggito P Tetuko, Silviana Simbolon, Masno Ginting, Perdamean Sebayang
Published 2018-06-01

Effect of Co and Ni additions as doping materials on the micro-structures and the magnetic properties of barium hexa-ferrites

by Masno Ginting, Perdamean Sebayang, Martha Rianna, Marhaposan Situmorang, Heryani Fujiati, Anggito P. Tetuko, Eko Arief Setiadi, Candra Kurniawan, Achmad Maulana Soehada Sebayang
Published 2020-04-01