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Suhadi Muliyono

Department Of Physics Universitas Mulawarman

Author-ID : 5802000

Astronomy Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Physics

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Analisis Penggunaan Bolus Berbahan Plastisin pada Pasien Fibrosarcoma dengan Treatment Planning System (TPS) Riska Fitriani; Kadek Subagiada; Suhadi Muliyono; Robert Janssen Stevenly; Suryaningsih Suryaningsih
Progressive Physics Journal Vol 3 No 1 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Bolus is a material that has properties similar to body tissues and is used to maximize the absorbed dose on the skin surface. The purpose of this research was to determine the most optimal treatment to kill fibrosarcoma on the patient’s skin surface by comparing the isodose curve and the value of the radiation absorption dose on the physical bolus (from CT-Scan) and model bolus (TPS). This study used data in the form of bolus images (with a bolus thickness of 0 cm, 0.5 cm and 1.0 cm) and phantom image. Then the data was processed with Treatment Planning System (TPS) and given energy variations in the form of electrons (10 MeV, 12 MeV, dan 15 MeV) and photons (6 MV and 10 MV). The result of this research was an isodosis curve that describes the distribution of the dose and the value of the absorbed dose of radiation received by the skin surface. The conclusion of this research is a bolus thickness of 0,5 cm and an electron energy of 15 MeV, has more even isodose curve (covering the entire tumor) and the maximum absorption dose value were 5720 cGy for physical bolus and 5710 cGy for TPS bolus.

Kaitan konduktivitas listrik dengan konsentrasi larutan garam dapur Sapna Maharani; Suhadi Muliyono; Erlinda Ratnasari Putri
Progressive Physics Journal Vol 3 No 2 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Research of the relationship between electrical conductivity and the concentration of table salt solution in several brands of table salt, namely brand A, brand B and brand C, has been done. Electrical conductivity () is used as the dependent variable, while concentration (C) is used as the independent variable. The concentration values are 0.1%, 0.2%, …, 0.7% for each brand of table salt. Measurements of electrical conductivity using a tool Conductivity Metertype pH/EC-983. Next, the average of the result of the measurements of electrical conductivity (σ ̅) are plotted against the concentration (C) of the table salt solution for the each brand of table salt, where each of the result is a straight line (linear) that it has a positive gradient/slope, that is σ ̅=(1360000C+694)µS/cm for brand A table salt, σ ̅=(1315300C+644)µS/cm brand B table salt and σ ̅=(1281700C+566)µS/cmfor brand C table salt. It seems that the gradient/slope of the straight lines in the various brands of table salt is almost the same, which it means that in general the content of ions in the various brands of legal table salt is relatively not much different. While the positive value of the gradient have the meaning that the higher the concentration of table salt solution, the higher the value of the electrical conductivity, which it is theoretically compatible with the physical concept.

Penentuan Nilai Faktor Mesin Pesawat Sinar-X Radiografi Digital Merek Shimadzu di RSUD Dr. Kanujoso Djatiwibowo Balikpapan Mamba'ul Fitriyana; Suhadi Muliyono; Kadek Subagiada
Progressive Physics Journal Vol 1 No 1 (2020): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

The research on the determining machine factor (k) of Shimadzu digital radiograph X-ray machine have been done at the RSUD Dr. Kanujoso Djatiwibowo Balikpapan. Machine factor should be required in the calculation of radiation exposure which produced by the X-ray machine. Measurement data that have been used as independent variables were current-time, focus distance to the detector and tube voltage variations of 80 kV to 100 kV, while the dependent variable was the S value. Determination of the k value was conducted by weighted linear regression between V2 and using the results of research by Seibert and Morin (2011) for the condition of calibrated X-ray machine. Thus, the reseach has obtained the machine factor of the Shimadzu digital radiograph X-ray machine at the RSUD Dr. Kanujoso Djatiwibowo Balikpapan.

Kaitan Tingkat Intensitas Bunyi terhadap Jarak dari Mesin Pembangkit Listrik (Genset) di RSUD Dayaku Raja Kota Bangun melti lestiyani lestiyani; Suhadi Muliyono; Devina Rayzy Perwitasari Sutaji Putri
Progressive Physics Journal Vol 2 No 2 (2021): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Research has been carried out on the relationship between the level of sound intensity and the distance on region 1 and region 2 from a power generator set (genset) at the Dayaku Raja Hospital, Kota Bangun. The sound intensity level value (β) is used as the dependent variable and the distance value (d) is used as the independent variable. Measurement distance in region 1 is 7 meters, while in region 2 is 30 meters, where measurement space of β is 1 meter used Sound Level Meter. Furthermore, average of β plotted with the distance (d), which the distance from the outer surface of the gensets house wall to measurement point of β (region 1) and the distance from the inner surface of the halfway house wall to measurement point of β (region 2) which the longer of the distance the smaller β are produced, where the linier curves with negative gradient are produced, that is (-1,6dB/m)d + 71,9dB (region 1) dan β = (-0,2dB/m)d + 50,1dB (region 2). On the research, β is on the range of 60 dB to 70 dB on region 1 and 40 dB to 50 dB on region 2 are produced. Thus, β from a power generator (genset) at the Dayaku Raja Hospital Kota Bangun less than Noise Threshold Value based on Peraturan Menteri Tenaga Kerja dan Transmigrasi No. 13/MEN/X/2011.

Co-Authors Devina Rayzy Perwitasari Sutaji Putri Kadek Subagiada Mamba'ul Fitriyana melti lestiyani lestiyani Riska Fitriani Robert Janssen Stevenly Sapna Maharani Suryaningsih Suryaningsih

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