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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Energi Dan Manufaktur Bumi Lestari Jurnal Sains Materi Indonesia Journal of Engineering and Technological Sciences Telaah Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Jurnal Penelitian Pendidikan IPA (JPPIPA) Kappa Journal CERATA
Hery Suyanto
Program Studi Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Journal : Kappa Journal

 1 
Analisis Korosifitas Baja Ringan dengan Metoda Laser Induced Breakdown Spectroscopy (LIBS) Siti Raudatul Jannah; Ni Nyoman Ratini; Windarjoto Windarjoto; Hery Suyanto
Kappa Journal Vol 5 No 1 (2021): Juni
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v5i1.3446

Abstract

Method has been carried out. Research is done on mild steel zincalume type with immersion treatment (NaCl 3.5%) for 10 days, and 30 days and without immersion. Mild steel is laser irradiated (Nd-YAG 1064 nm, 7 ns) with energy of 120 mJ, and the data is taken with an accumulation of 3, delay time of 0.5 µs. Elements identification is done by taking data from up to 75 μm from the surface. The results of the analysis with LIBS showed immersion for 10 days, the corrosion rate and hardness of mild steel increased with 30 days immersion. The increase in the corrosion rate of mild steel is indicated by decreasing the value of dissolved oxygen intensity, the electrochemical reaction is fast. The decrease in the corrosion rate is indicated by the increase in the intensity value of Zn and Al elements associated with the formation of a passive film on the metal surface as a protective layer to protect further corrosion attacks.DOI : 10.29408/kpj.v5i1.3446
Analisis Dosis Keluaran Berkas Sinar-X Pesawat Linac Varian Clinac CX Berdasarkan Protokol Dosimetri IAEA TRS 398 Komang Sugiarta; Ni Nyoman Ratini; Hery Suyanto; Syarifuddin Syarifuddin
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6327

Abstract

Research has been conducted on the Analysis of the X-ray beam output of the Linac varian Clinac CX based on the TRS 398 IAEA. This analysis aims to determine the condition of Linac in Bali Mandara Hospital with reference to the value of 1 cGy equal to 1 MU obtained from the analysis of the ionization chamber, temperature, pressure, polarity effect and ion recombination. The research was conducted with variations of X-ray energy 6 MV and 10 MV. The size of the irradiation field used is (10 x 10) cm with a Source to Surface Distance (SSD) of 100 cm. Based on the results of absolute measurements of the output dose of the Linac Varian Clinac CX X-ray beam at the Radiation Oncology Sub-Installation of the Bali Mandara Hospital with two variations of energy used, the output dose value at 6 MV energy is 1,00138 ???/?? and at 10 MV energy 0,99456 ???/?? with a large deviation of 0,138 % and 0,544 %, respectively, with the obtained deviation meeting the TRS 398 IAEA tolerance limit of ± 3%.
The Effect of Focus Film Distance Variation on Patient Absorbed Dose in Thorax Examination with Roentgen Machine in Radiology Installation of Sanjiwani Hospital Gianyar I Nyoman Yosua; Gusti Ngurah Sutapa; I Ketut Putra; Ida Bagus Suryatika; Hery Suyanto; Ida Bagus Alit Paramarta
Kappa Journal Vol 8 No 3 (2024): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i3.28113

Abstract

A study has been conducted on the effect of Focus Film Distance (FFD) variation on patient absorbed dose during thorax examination at the Radiology Installation of Sanjiwani Hospital, Gianyar. This study aims to determine the effect of FFD variation and the suitability of the radiation dose received by patients whether it is still within the limits of BAPETEN's decision. The X-ray machine used was Siemens Luminos Fusion Roentgen with the FFD variation method given a distance of 110 cm, 130 cm, and 150 cm in 30 patients. Dose measurements were carried out based on radiation exposure and analyzed according to BAPETEN standards. The results showed that the greater the FFD value, the smaller the absorbed dose received by patients. The highest absorbed dose obtained for FFD 110 cm was 0.3867 mGy, 130 cm was 0.2769 mGy, and 150 cm was 0.2079 mGy below the maximum limit of 0.4 mGy set by BAPETEN, so it is safe for patients. Statistical analysis of one-way t-test showed significant results, with thitung < ttabel. This indicates that FFD variation affects the absorbed dose, and all doses remain within safe limits. Thus, thorax examination at RSUD Sanjiwani Gianyar has met the established safety standards.
Co-Authors Aji Priyo Utomo Ayu Anisa Damayanti Dewi Handayani Engelia Rambu Maramba Meha Fiar Tri Santika Gusti Ngurah Sutapa Gusti Ngurah Sutapa I G. A. Widagda I Gde Antha Kasmawan I Gede Hendrawan I Gusti Agung Ayu Ratnawati I Gusti Bagus Wijaya Kusuma I Ketut Putra I Made Yuliara I Nengah Artawan I Nyoman Yosua I Putu Dedy Pratama I Putu Tedy Indrayana Ida Ayu Gede Kusuma Dewi Ida Bagus Alit Paramarta Ida Bagus Alit Paramarta Ida Bagus Ketut Yoga Ida Bagus Suryatika Irdhawati Irdhawati K. Suastika Kiichiro Kagawa Kiichiro Kagawa Komang Sugiarta Koo Hendrik Kurniawan Koo Hendrik Kurniawan Made Sumadiyasa Manuntun Manurung Maria Margaretha Suliyanti Maria Margaretha Suliyanti Marincan Pardede Mayumi Cahyandari Mohamad Infrawan Yulianto Ichwan Mohamad Infrawan Yulianto Ichwan Mulan Gevika Amara Putri Ni Ketut Anggun Damayanti Ni Ketut Esati Ni Komang Tria Pradnyani Dewi Ni Luh Emy Pramitha Ni Luh Putu Mustia Sridewi Ni Luh Putu Trisnawati Ni Nyoman Rupiasih Ni Nyoman, Ratini Ni Wayan Sariasih Nyoman Wendri Putu Edi Yastika Putu Ekayani Sri Tussniari R.A Restia Pranagari Rinda Hedwig Rinda Hedwig Shinta Shaleha Juwita Sinaga Natalia Declarossy Siti Raudatul Jannah Syarifuddin Syarifuddin Tambunan Matthew Valentino Tjung Jie Lie Tjung Jie Lie Vincent Milano Wayan Gede Suharta Winardi Tjahyo Baskoro Windarjoto Windarjoto Windarjoto Windarjoto Wulansari Efrilinda Diah