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All Journal Jurnal Fisika FLUX Journal of Physics and Its Applications Jurnal Fisika : Fisika Sains dan Aplikasinya Progressive Physics Journal
Wardani, Pratiwi Sri
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Astronomy Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Physics

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Penilaian Tingkat Risiko Postur Kerja Menggunakan Metode REBA dan Biomekanika Pada Aktivitas Mengangkat Beban Jordan, Aldi Rizki; Wardani, Pratiwi Sri; Subagiada, Kadek; Putri, Devina Rayzy Perwitasari Sutaji; Natalisanto, Adrianus Inu
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.
Pengujian Karakteristik Alat Ukur Radiasi Dose Calibrator Menggunakan Sumber Teknesium-99m di Instalasi Kedokteran Nuklir Rumah Sakit Abdoel Wahab Sjahranie Samarinda Mutmainna, Fahira Mutya; Wardani, Pratiwi Sri; Putri, Erlinda Ratnasari; Zurma, Retno
Progressive Physics Journal Vol. 5 No. 1 (2024): 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.v5i1.1038

Abstract

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. One isotope that is widely used in the field of nuclear medicine, namely Tc-99m. The research steps this time are: firstly the elution performed by radiopharmaceuticals, secondly measuring background activity (background), thirdly calling for Tc-99m sources, fourthly measuring Tc-99m activity, fifthly calculating Tc-99m activity for testing precision, and sixth evaluate the results. Based on the research results on the precision test, it was found that the measurement results for the Tc-99m source were obtained at 0.578%. It can be concluded that the Capintec CRC 25R dose calibrator has good characteristics and performance, so that the measurement results can be trusted.
Kalibrasi Timbangan Elektronik Non-Otomatis di UPTD Balai Pengujian dan Sertifikasi Mutu Barang Samarinda Norliani, Norliani; Wardani, Pratiwi Sri; Putri, Erlinda Ratnasari; Jamaluddin, M. Nur
Progressive Physics Journal Vol 4 No 2 (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.v4i2.1010

Abstract

Scales are one of the vital measuring tools that have long been used by humans in everyday life. In determining the measurement quality of the scales, calibration is needed to determine the value of uncertainty. In this regard, a study was conducted to determine the uncertainty of non-automatic electronic scales calibrated using the E2 class standard, and to determine the quality of the instrument from the measurement results by looking at the uncertainty of the calibration results of non-automatic electronic scales. The calculation of the calibration of the electronic scales includes the magnitude of the measurement repeatability, correction of scale readings, the effect of loading not in the middle of the pan, and the effect of hysteresis from the scale by using the direct comparison method to the mass of the reference standard, namely by using the mass standard from class E2. From the calibration of the electronic scales that have been carried out, the results of the correction uncertainty value are 0.0002 g and the maximum uncertainty value is 0.00027 g, while the combined uncertainty is obtained a value of 0.00032 g, which means that the non-automatic Electronic Analytical Balance meets the uncertainty. determined by the standard used. In addition, the non-automatic Electronic Analytical Balance scale is included in good condition with hysteresis test indications of no more than one resolution.
Hubungan Suhu dan Kelembapan Ruangan Terhadap Sick Building Syndrome (SBS) di UPTD Balai Pengujian dan Sertifikasi Mutu Barang (BPSMB) Samarinda Lagihara, Chrismasisca Hanni Drescher; Wardani, Pratiwi Sri; Natalisanto, Adrianus Inu
Progressive Physics Journal Vol. 5 No. 1 (2024): 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.v5i1.1093

Abstract

Samarinda is one of the cities in East Kalimantan, in Samarinda itself there are many office buildings that use AC coolers. One of the office buildings in Samarinda is the Quality Testing and Certification Center of East Kalimantan’s Building (UPTD. Balai Pengujian dan Sertifikasi Mutu Barang Provinsi Kalimantan Timur). Room temperature and humidity greatly affect the level of worker productivity, but not many people understand the existence of sick building syndrome (SBS). The purpose of this study was to determine the characteristics of employees regarding SBS complaints based on age and length of work and to find out the description of room temperature and humidity at UPTD BPSMB. The type of research used is non-probability sampling with a descriptive approach. The sample in this study were UPTD BPSMB Samarinda employees with a sample size of 20 people. The sampling technique was determined by purposive sampling method. The results of this study showed that the most commonly experienced symptoms were dry skin (50%), drowsiness (40%), dry lips and fatigue (20%), eye irritation, headaches, and difficulty concentrating (15%). From the results of the cross-tabulations that were carried out, it was found that there was no relationship between temperature and SBS, age and SBS, and duration of work with SBS, Still, there was a relationship between humidity and SBS. It is suggested to the UPTD BPSMB to monitor the room at least once a month to see the temperature and humidity conditions of the room so that employees can work comfortably and can increase employee productivity.
Pengolahan Citra Digital EKG Rumah Sakit Tk.IV Samarinda Setyowati, Anggriya Feby; Wardani, Pratiwi Sri; Putri, Erlinda Ratnasari; Putri, Devina Rayzy Perwitasari Sutaji
Progressive Physics Journal Vol. 5 No. 1 (2024): 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.v5i1.1037

Abstract

In the hospital itself, especially in the MCU Poly Radiology Installation, it is a unit that performs services such as Medical Check Up, making health certificates, and carrying out routine checks at an institution. ECG examination is one of the services most frequently performed routinely by patients. Examinations carried out include medical check-ups, monitoring of long-term therapy, patient to assessment before surgery, individual screening for high-risk jobs, examinations before participating in sporting events, and overall examinations as a condition of employment. This study carried out the process of withdrawing information or object descriptions or identifying objects contained in images by compressing or reducing image data. By using EKG data from TK.IV Samarinda Hospital by carrying out processing stages such as converting analog data to digital, cropping, and applying filters to EKG images. After the filter is applied to the image, it is found that after 5 types of image processing (RGB Image, Grayscale Image, Binary Image, Thresholding Image, and Edge Detection Image) on the results of the ECG signal it can be concluded that the processed signal retains the features of the existing signal and information. . Of the five types of processing methods, the clearest result is conversion to Edge Detection imagery.
ANALISIS KELUARAN BERKAS FOTON FREE FLATTENING FILTER LINAC VARIAN HALCYON DENGAN VARIASI LUAS LAPANGAN RADIASI Putri, Aprilia Jatiningtiyas Ragil; Wardani, Pratiwi Sri; Intifadhah, Sahara Hamas
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 9 No 2 (2024): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v9i2.19345

Abstract

Penelitian ini bertujuan untuk menentukan hasil deviasi pengukuran keluaran berkas foton 6 MV Free Flattening Filter berdasarkan standar toleransi yang diperbolehkan pada protokol IAEA TRS No. 483 dan TRS No. 398 serta mengetahui pengaruh variasi luas lapangan radiasi terhadap keluaran berkas radiasi. Penelitian ini dilakukan menggunakan bantuan software MyQA Accept yang merupakan perangkat lunak QA tahunan. Penelitian ini menggunakan teknik Source Surface Distance (SSD) dengan metode Percentage Depth Dose (PDD) dan variasi luas lapangan 10×10 cm2, 12×12 cm2, 15×15 cm2, 20×20 cm2, 25×25 cm2, dianalisis untuk dapat menentukan kualitas dosis radiasi. Hasil analisis menunjukkan bahwa keluaran berkas per 2 MU lapangan 10×10 cm2 sebesar 1,999 Gy dengan deviasi 0,026%, lapangan 12×12 cm2 sebesar 2,025 Gy dengan deviasi 1,268%, lapangan 15×15 cm2 sebesar 2,037 Gy dengan deviasi 1,833% dan lapangan 20×20 cm2 sebesar 2,058 Gy dengan deviasi 2,900%, nilai ini masih berada dalam rentang standar toleransi IAEA karena ˂3%. Namun, keluaran berkas lapangan 25×25 cm2 sebesar 2,084 Gy dengan deviasi 4,209%, dianggap tidak lolos dan melewati batas toleransi IAEA sehingga dapat menyebabkan efek radiasi untuk organ sehat di sekitar target.
Verification of Co-60 Source in Brachytherapy Equipment Using TW33005 Well-Type Chamber Hemelia, Junita; Wardani, Pratiwi Sri; Intifadhah, Sahara Hamas; Zarkasi, Ahmad; Putri, Devina Rayzy Perwitasari Sutaji
Journal of Physics and Its Applications Vol 7, No 1 (2024): November 2024
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i1.24100

Abstract

Accidents in brachytherapy have occurred and are documented by the IAEA. These incidents are attributed to various factors, such as inaccurate sources, lack of independent verification, and equipment failures due to inadequate calibration. Verifying radioactive sources is crucial for ensuring patient safety. Verification is conducted to confirm that the measured source activity is accurate and stable. Accuracy and stability of source activity are two essential parameters in verification. Source activity accuracy indicates how closely the measured source activity aligns with the reference source activity, while source activity stability reflects the well-type chamber's ability to produce consistent results over time. This study aimed to verify the Co-60 sources at Dr. Kanujoso Djatiwibowo General Hospital using a TW33005 well-type chamber and analyze the results against national and international standards. The results showed that the Co-60 source activity values remained accurate and stable over five months. The highest accuracy was observed in November 2023 (-2.011%), while the lowest was in October 2023 (-2.397%). The highest stability was recorded in September 2023 (-0.416%), and the lowest in October 2023 (-2.090%). In conclusion, the Co-60 sources at Dr. Kanujoso Djatiwibowo General Hospital met the accuracy standards set by ESTRO and BAPETEN of 3% to 5% and the stability standard set by the IAEA of ±3%. This indicates that the sources are safe for use in brachytherapy.
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 Daniel Happy Putra Hemelia, Junita Intifadhah, Sahara Hamas Jamaluddin, M. Nur Jordan, Aldi Rizki Kadek Subagiada, Kadek Lagihara, Chrismasisca Hanni Drescher Missinychrista, Ronel Arida Mutmainna, Fahira Mutya Oktafianingrum, Alisya Payon, Fransiska Lipa Putri, Aprilia Jatiningtiyas Ragil Putri, Devina Rayzy Perwitasari Sutaji Setyowati, Anggriya Feby Stevenly, Robert Janssen Zurma, Retno