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All Journal Jurnal Fisika FLUX Jurnal Inotera Journal of Physics and Its Applications Jurnal Fisika : Fisika Sains dan Aplikasinya Progressive Physics Journal
Pratiwi Sri Wardani
Universitas Mulawarman
Astronomy Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : jurnal fisika flux

 1 
Analysis of Skin Protection from the Dangers of Sun Exposure Using Color Variations and Types of Cotton Fabrics Norliani Norliani; Mislan Mislan; Pratiwi Sri Wardani; Erlinda Ratnasari Putri
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.15172

Abstract

Cotton fabric is a comfortable clothing material to wear in tropical climates. In addition to the comfort aspect, cotton cloth is expected to be able to protect the skin from the dangers of sun exposure. This research was conducted with the aim of knowing the optimum amount of protection produced by cotton cloth, determining the type and color of cotton cloth that is most effectively used as a protector, and knowing the SPF (sun protection factor) value category based on the type and color of cotton cloth. This study used three types of cotton cloth, each consisting of four colors, as well as a Digital Environment Multimeter which was used to measure the intensity of sunlight in units of lux. The protection value is obtained by comparing the intensity of sunlight without a cotton cloth protector (lux) with the intensity of sunlight using a cotton cloth protector (lux). The results obtained show that the most optimum protection value is found in black toyobo cotton cloth with an SPF value of 54.4 and a transmittance of 1.8%. The cotton fabrics that provided the most effective protection based on type and color were black and blue toyobo, medina and Japanese cotton fabrics. Based on the SPF value obtained, it can be seen that black and blue toyobo cotton fabrics, and black madinah cotton fabrics have a very good protection category. The black and blue Japanese cotton fabrics, as well as the blue medina type, have a good protection category, while the orange Toyobo cotton fabrics have a sufficient protection category.
Testing the Characteristics of the Dose Calibrator Radiation Measurement Tool using Technetium-99m and Cobalt-57 at the Nuclear Medicine Installation at RSUD A. W. Sjahranie Samarinda Fahira Mutya Mutmainna; Retno Zurma; Pratiwi Sri Wardani; Erlinda Ratnasari Putri
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.15439

Abstract

A dose Calibrator is one of the dosimeters used to measure radionuclide activity before being given to patients. In order to function as a radiation dosimeter, the dose calibrator must have several good dosimeter properties, such as precision and stability. To test the dose calibrator, a source used by the hospital is required. The dose calibrator used in Instalasi Kedokteran Nuklir RSUD A. W. Sjahranie Samarinda is Capintec 25R. Two of the isotopes are widely used in nuclear medicine, namely Tc-99m and Co-57. The first step of this research was the elution performed by radiopharmaceuticals, then measured background activity. Then, Tc-99m and Co-57 activity were measured. Then, Tc-99m and Co-57 activity were measured for precision and stability tests, finally, graphs were made and evaluated. Based on the research results on the precision test, it was found that the measurement results for the Tc-99m source were obtained at 0.305%, while the result for measuring the activity of the standard Co-57 source was obtained at 0.307%. In the stability test, the result of measuring the Tc-99m source obtained a value of 0.563%, while the result of measuring the activity of the standard Co-57 source obtained a value of 0.437%. It can be concluded that the Capintec CRC 25R in RSUD A. W. Sjahranie Samarinda has good characteristics and performance so the measurement results can be trusted.
Improving the Quality of CT Images of Stroke Patients Using the SSDE and K-Means Segmentation in the Radiology Installation of RSUD A.W. Sjahranie Samarinda Putri, Erlinda Ratnasari; Payon, Fransiska Lipa; Missinychrista, Ronel Arida; Putri, Devina Rayzy Perwitasari Sutaji; Wardani, Pratiwi Sri; Subagiada, Kadek
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 1 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i1.17100

Abstract

Stroke examination using a CT scan is a technique that produces 3D brain images without having to do surgery. The purpose of this study was to determine the dose received by each patient who underwent a CT-scan procedure and to improve the image quality of the results. Optimization of the dose for each patient is based on a comparison between the calculated SSDE value and the DRL in the form of CTDIvol and DLP, which are implemented in Indonesia. Improving the quality of CT-Scan images through digital processing using the segmentation method to determine the stroke area. The method used is K-Means segmentation. The results obtained for the SSDE value are the dose received by the patient which is higher than the dose issued by the device or the  value. However, the SSDE, CTDIvol, and DLP values are still below the DRL standard range set by BAPETEN, so they are still within the safe inspection threshold. The average CTDIvol value, which is the output dose value of the device from 22 patients, was 41.84 mGy and the 75th percentile value was 42.7 mGy. The average DLP value is 1054.08 mGy.cm and the 75th percentile value of the DLP value is 964.13 mGy.cm. The average value of the SSDE value which is the value of the dose received by the patient is 43.39 mGy and the 75th percentile value is 42.440 mGy. Based on these results, the value of the dose received by the patient is higher than the value of the dose issued by the device. Segmentation using the K-Means method with the number of clusters k = 3 produces an accuracy of 86.3%. This means that the patient receives a dose of CT-Scan radiation within safe limits and his image can be processed properly, as evidenced by the high success of the segmentation process.
Comparison of Cut Out Transmission Variations on a 10x10 cm2 Applicator for Linac Electron Beam Oktafianingrum, Alisya; Stevenly, Robert Janssen; Wardani, Pratiwi Sri; Putri, Erlinda Ratnasari
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 2 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i2.17701

Abstract

Radiotherapy has provisions for providing radiation doses for patient therapy, as giving the minimum possible dose to healthy tissue and giving the maximum possible dose to cancer. The aim of this research is to compare the electron beam output with measurements of cut out transmission variations (using a built-in block, without using a block, and using a cerrobend block). This research used a 10x10 cm2 applicator which was attached to the Linac. The blocks were installed and the absorbed dose was measured using water phantom and Markus ionization detektor. Besides that, absorbed dose was also measured without blok. The energy used in this study was 12 MeV and the a mount of radiation dose from Linac was 100 MU. Measurement results using a built-in block (lead) of 100 cGy, a cerrobend block of 100 cGy. Measurements without using a block were 102 cGy. This measurement has a comparison in the results that get low and high deviation values. Measurements using lead blocks and cerrobends are 0%, while measurements without blocks have a deviation value of 2%. These three measurements are still within the IAEA 398 TRS standard tolerance limit, i.e, ± 2%.
Co-Authors Adrianus Inu Natalisanto Ahmad Zarkasi Asmar Adhan Ramadhan Daniel Happy Putra Devina Rayzy Perwitasari Devina Rayzy Perwitasari Sutaji Putri Erlinda Ratnasari Putri Fahira Mutya Mutmainna Hemelia, Junita Intifadhah, Sahara Hamas Jamaluddin, M. Nur Jordan, Aldi Rizki Kadek Subagiada, Kadek Lagihara, Chrismasisca Hanni Drescher Mislan Mislan Missinychrista, Ronel Arida Mukholiq Fathunnisa Mutmainna, Fahira Mutya Norliani Norliani Nur Alya Oktafianingrum, Alisya Payon, Fransiska Lipa Puspa Syadariah Putri, Aprilia Jatiningtiyas Ragil Putri, Devina Rayzy Perwitasari Sutaji Retno Zurma Robert Janssen Stevenly Robert Janssen Stevenly Setyowati, Anggriya Feby Siti Khadijah Stevenly, Robert Janssen Suryaningsih Suryaningsih Yasinta Erikania Daniartie Zurma, Retno