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All Journal Progressive Physics Journal Geosains Kutai Basin
Kadek Subagiada
Prodi Fisika, FMIPA, Universitas Mulawarman
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.818 KB) | DOI: 10.30872/ppj.v3i1.818

Abstract

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.
Menentukan Intensitas Radiasi UV yang Diterima Pekerja Pengelasan dengan Titik Area Mata, Siku, dan Betis Muliana Dai; Kadek Subagiada; Adrianus Inu Natalisanto
Progressive Physics Journal Vol 2 No 1 (2021): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (885.122 KB) | DOI: 10.30872/ppj.v2i1.736

Abstract

The aim of this study is to measure the UV intensity received by the welders during working time and compare the results of measured radiation intensity which is obtained with the NAB in Regulation of the Minister of Manpower No. 05 of 2018 that is 0,0008 mW/cm2. The reason for using this NAB is for compare value while welding process with the value were allowed from Regulation of the Minister of Manpower. This study has been done in some workshops using the UV Meter and focused on the welders’ eye, elbow and calf area with 10 repetitions in each area. The results for eye area were 0.0749 mW/cm2, for elbow area were 0.0843 mW/cm2and for calf area were 0.0934 mW/cm2and all the results obtained exceed the NAB. The high value is caused by the environmental conditions is open and also affected by indeterminate sunlight, the risks received the welders in watery eye and headache because of the welder are disobey in using PPE while welding process.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.21 KB) | DOI: 10.30872/ppj.v1i1.563

Abstract

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.
Penilaian Tingkat Risiko Postur Kerja Menggunakan Metode REBA dan Biomekanika Pada Aktivitas Mengangkat Beban Aldi Rizki Jordan; Pratiwi Sri Wardani; Kadek Subagiada; Devina Rayzy Perwitasari Sutaji Putri; Adrianus Inu Natalisanto
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.1021

Abstract

The activity of lifting weights has many risks that can lead to complaints and work accidents such as mistakes in lifting excessive loads, overly bent postures, and other complaints that result in uncomfortable working conditions. This research was conducted to determine the risk level of work posture using the REBA method and biomechanics in lifting weights with different lifting variables. The research were took documentation data, angle and distance measurements by using the Kinovea application, and the data analyzed by using the REBA Assessment Worksheet and biomechanical equations. Based on the results obtained, the activity of lifting burdens on workers from the aspect of the REBA method mostly has a high level of risk category and only 1 worker has a moderate level of risk category. Meanwhile, from the biomechanics aspect, most of them have a risk level in the careful category, 1 worker has a risk level in the safe category, and 1 worker who has lifted a load of 50 kg has a risk level in the dangerous category.
ANALISIS KLASIFIKASI LAJU EROSI MENGGUNAKAN METODE UNIVERSAL SOIL LOSS EQUATION (USLE) DENGAN SIG DI KOTA SAMARINDA Wisnu Sadewo; Kadek Subagiada; Djayus Djayus
JURNAL GEOSAINS KUTAI BASIN Vol 6 No 1 (2023)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v6i1.1011

Abstract

Peningkatan jumlah penduduk akan membuat kebutuhan akan sumber daya dan lahan akan semakin meningkat. Pemanfaatan sumber daya alam dan pembukaan lahan yang berlebih akan menimbulkan berbagai permasalahan, salah satu permasalahanya adalah erosi. Penelitian ini dilakukan untuk mengetahui klasifikasi lajur erosi di Kota Samarinda serta mengetahui sebaran erosi dengan kategori sangat berat di Kota Samarinda. Perhitungan laju erosi didasarkan pada empat faktor yaitu, faktor erosivitas curah hujan (R) dihitung dari intepretasi data curah hujan, faktor erodibilitas tanah (K) ditentukan dari analisis peta jenis tanah, faktor kelerengan (LS) ditentukan dari analisis data DEM (Digital Elevation Model), faktor vegetasi dan tutupan lahan (CP) ditentukan dari peta tutupan lahan. Berdasarkan empat fakor tersebut selanjutnya dihitung klasifikasi laju erosi dengan menggunakan metode Universal Soil Loss Equation (USLE). Hasil penelitian menunjukkan hasil klasifikasi laju erosi di Kota Samarinda menunjukkan 46,23 % dari luas wilayah tergolong sangat ringan ( <15 ton/ha/th); 8,37 % tergolong kelas ringan (15-60 ton/ha/th); 7,76 % tergolong kelas sedang (60-180 ton/ha/th); 18,94 % tegolong berat (180-480 ton/ha/th), dan 18,70 % wilayah yang tergolong pada kelas erosi sangat berat ( >480 ton/ha/th). Luas sebaran erosi di Kota Samarinda dengan kategori sangat berat yaitu 480 ton/ha/th memiliki luas sebesar 12442,37 Ha atau setara dengan 18,70 % luas wilayah Kota Samarinda, hal ini disebabkan pada wilayah tersebut kondisi lahan sudah terbuka tanpa penutup diatasnya yang menyebabkan tanah akan mudah tererosi karena tidak adanya faktor yang menghambat laju erosi
Co-Authors Adrianus Inu Natalisanto Adrianus Inu Natalisanto Aldi Rizki Jordan Devina Rayzy Perwitasari Sutaji Putri Djayus Djayus Mamba'ul Fitriyana Muliana Dai Pratiwi Sri Wardani Riska Fitriani Robert Janssen Stevenly Suhadi Muliyono Suryaningsih Suryaningsih Wisnu Sadewo