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Jurnal Fisika FLUX
Published by Universitas Lambung Mangkurat
ISSN : 1829796X     EISSN : 25411713     DOI : -
Core Subject : Science, Education,
Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
Jurnal Fisika FLUX is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of physics including applied physics, which includes: physics instrumentation and computation, biophysics, geophysics, physics materials, theoretical physics, and physics education. Journal use single peer reviewed to publish. This journal is published by Universitas Lambung Mangkurat Press. ISSN 1829-796X (print) and ISSN 2541-1713 (online) Jurnal Fisika FLUX is published twice a year. Articles will be peer reviewed first. Once ready to be published immediately on the current edition.
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Articles 555 Documents
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A Comparison of CT-Scan Output Doses and Doses Given to Kidney Stone Patients Ronel Arida Missinychrista; Kadek Subagiada; Erlinda Ratnasari Putri
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 3 (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.v20i3.17098

Abstract

Kidney stones are a disease which occurs in the urinary tract and are hard accumulations like stones that form along the urinary tract and can cause pain, bleeding, obstruction to the flow of urine or infection. Generally, the method of diagnosis given by doctors to patients with kidney stones is through a CT scan. However, so far it is not known how much radiation the patient receives during the CT scan procedure. Therefore, in this study an analysis was carried out regarding the comparison of the dose issued by the CT-Scan with the dose received by the patient on the CT-Abdomen examination, an analysis of the patient dose based on the SSDE value on the CT-Abdomen examination, and an analysis of the total dose received by the patient on CT-Abdomen examination. The data used in this study is data downloaded from the official website page of the "Data Science Institute American College of Radiology" at https://www.acr.org/. Based on the results of existing research, the researchers drew the conclusion that the doses released by the device tend to be lower than the doses received by patients, the maximum SSDE value is 28.7550 mGy and the minimum SSDE value is 6.7978 mGy, the maximum DLP value is of 657.1314 mGy.cm and the minimum DLP value is 62.5992 mGy.cm. This should be a concern for radiation workers to pay attention to the dose received by the patient during the examination.
Fabrication of Palm Leaf Fiber Board Biocomposite for Thermal Insulation Material Kusmawati, Intan; Yana, Debi; Husna, Ropiqotul; Aisah, Nurul; Syahputra, Romi Fadli; Ginting, Delovita
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.v21i2.17003

Abstract

Utilizing palm frond biomass for the production of composite materials will have a positive impact on managing palm oil plantation waste. Palm frond fiber biocomposite products have been proven to have good mechanical properties. However, exploration of other physical properties, especially thermal insulation properties, has not been widely studied. As a non-conducting material, palm frond fiber has the potential to have good thermal insulation properties. This study aims to fabricate palm frond biocomposite fiberboard, which has potential as a thermal biocomposite material. Fiberboard is made using the manual hand lay-up technique and cold compaction using a press machine. The characteristics under consideration for the fiberboard in concern encompass its physical, mechanical, and thermal properties. The main ingredients utilized in the fabrication of fiberboard predominantly comprise palm frond fiber and epoxy resin, with five distinct sample variants denoted as PSP-1 (84% fiber:16% resin), PSP-2 (83% fiber:17% resin), PSP-3 (82% fiber:18% resin), PSP-4 (81% fiber:19% resin), and PSP-5 (80% fiber:20% resin). The experimental results obtained from the testing of physical parameters indicated that the density of fiberboard exhibited a range of values spanning from 0.28 g/cm3 to 0.55 g/cm3. Similarly, the fiberboard's water absorption capacity varied between 107.25% and 194.00%. The water absorption abilities display significant variability, as indicated by a large standard deviation ranging from 28.15% to 80.35%. When the density of fiberboard is high, its water absorption capacity tends to be low. Furthermore, the mechanical tests revealed that the fiberboard's flexural strength showed a range of values spanning 1.10-5.42 MPa. The magnitude of specific heat capacity for fiberboard is calculated to be between 2.1-3.5 J/g ̊C, while the thermal conductivity lies within the range of 0.001-0.0020 W/mK
Profile of Rainfall Patterns and Extreme Air Temperatures 1981-2020 in the Mosunal Region of Indonesia (Case Study: South Sumatra) Ariska, Melly; Supari, Supari; Irfan, Muhammad; Iskandar, Iskhaq
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.v21i1.14022

Abstract

Increasing concentrations of greenhouse gases have led to changes in extreme climate events. This study aims to describe the picture of climate change in the South Sumatra Region during the last 40 years, namely from 1981-2020. Rainfall and extreme temperature data were obtained from BMKG data for South Sumatra Province at the Palembang City Climatology Station (SK Palembang City) and the Sultan Mahmud Badaruddin II Meteorological Station (SM SMB II). Maximum temperature data, minimum temperature and rainfall were obtained based on parameter profiles obtained from BMKG data for South Sumatra Province based on the ETCCDMI provisions. Maximum temperature data, minimum temperature and rainfall are processed with RClimDex software so that temperature and extreme rain index data are obtained. These indices are extreme climate indices consisting of TN90p, TX90p, TNn, TNx,TXx, TXx, TMAXmean, TMINmean, RX1day, RX5day, SDII, CDD and CWD. The results of this study indicate that the trend of air temperature will increase significantly in South Sumatra Province, especially the minimum air temperature, then the precipitation pattern will also increase, especially the accumulation of rainfall for 5 consecutive days. There is an increase in the number of dry days and a decrease in the number of wet days, as well as the higher accumulation of daily rainfall but the wet days are decreasing day by day. This is also increasingly having an impact on climate change in South Sumatra Province which is getting hotter day by day and the smoke disaster due to land and peat fires in South Sumatra Province is increasingly worrying.
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.
Impact of Frequency Variations in Ultrasonic Transducers on Material Properties Maiyena, Sri; Ayop, Shahrul Kadri; Mat Daud, Anis Nazihah
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.v21i2.17166

Abstract

Research has been carried out to determine material properties using ultrasonic waves. The aim of the research is to see the effect of variations in ultrasonic transducer frequency on material properties, material mechanical properties and material acoustic properties. The ultrasonic technique used is based on the pulse echo technique. The samples used were steel with a thickness of 2.5 cm, aluminum with a thickness of 2 cm and 1.8 cm and PMMA with a thickness of 1.5 cm, 1 cm and 0.2 cm. There are three variations of transducer frequency used, namely 2.25 MHz, 5 MHz and 10 MHz. The mechanical property of the material that will be determined is the elastic modulus. The acoustic properties of the material to be determined are longitudinal velocity, attenuation coefficient and acoustic impedance. The results showed that variations in transducer frequency did not affect the values of elastic modulus, longitudinal velocity and acoustic impedance. However, the use of transducer frequency variations affects the attenuation coefficient value.
Identification of Pneumonia on Thorax X-Ray Image Using the Convolutional Neural Network Method Model VGG16 Pramesti, Meita Ananda; Arman, Yudha; Hasanuddin, .
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.v21i1.15595

Abstract

Pneumonia is an inflammation of the lung parenkime caused by bacteria, viruses, and other infections. Generally, the detection of pneumonia can be done by analyzing the x-ray image of the thorax after the reported symptoms and recommendations given by the physician. Previous studies said that Convolutional Neural Networks (CNN), part of Deep learning technology, can be used to analyze x-ray images. It also reported that this method could reduce independent parameters and handle the deformation of input images, such as translation, rotation, and scale. In this study, we report the implementation of CNN model VGG16 with varying epochs and pixels on chest x-ray images to classify pneumonia. The data used are 4000 x-ray images of the thorax taken from the Mendeley website. Final classification processes were done by using the softmax activation function. The results were tested using 20 batch sizes based on 2 image treatment parameters, namely resize and epoch. We reported that the higher image reduction size can increase the average calculation’s accuracy. It is found that the highest accuracy (87,54%) is obtained from the resizing of 300×300 pixels. The lowest average accuracy, 79.61%, is shown at a resize size of 100×100 pixels. The highest accuracy (94.39%) for the epoch variant on the resized image of 300×300 pixels is obtained on the 30th epoch
Distribution of Ground Temperature in the Geothermal Manifestation Area of Lompio, Donggala Regency, Central Sulawesi Province Sitti Rugayya; Badaruddin Badaruddin; Asrafil Asrafil
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 3 (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.v20i3.12173

Abstract

The distribution of non-volcanic geothermal energy is widely found on the island of Sulawesi, one of which is in Lompio Village, Sirenja District, Donggala Regency, Central Sulawesi Province. It is important to study the geothermal potential in the village in order to learn how the geothermal system works. This study aims to identify the distribution pattern of temperature distribution in shallow soil depths as a manifestation of the geothermal system below the surface and its relation to geothermal manifestations that appear on the surface. This research was carried out through a series of field observations and direct soil temperature measurements in the study area using a thermometer. The results show that the distribution pattern of land temperature distribution in the high-temperature zone is associated with the presence of geothermal manifestation points on the surface (hot springs). The association of temperature and manifestation is possible because the presence of hot springs is an indication of a weak zone for the release of hydrothermal fluid from the geothermal system, which is correlated with the geological structure in the research area.
Subsurface Analysis of Sibayak Mountain Karo Regency Using Geomagnetic Method with 2D and 3D Modeling Putri, Nadinda Dwi; Lubis, Lailatul Husna; Sirait, Ratni
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.v21i2.17515

Abstract

Mount Sibayak is a quaternary volcano located in the Berastagi area, located in the northern part of the island of Sumatra, approximately 25 km north of Lake Toba. However, the rocks produced are very different from rocks of the same age in Sumatra, Java, and the Toba Tufa. To dig up information about the subsurface structure of the Mount Sibayak area, Karo Regency, use Geophysics. This research uses the geomagnetic method to interpret subsurface layers and rock types based on the intensity of the magnetic field measured at the surface. Measurements were carried out using the PPM GMS 19T (Proton Procession Magnometer) tool by taking data from 51 measurement points with a range of ±10 meters at each measuring point. Data processing begins with IGRF correction, separation of regional and residual anomalies using a bandpass filter, reduction to the poles, and data interpretation. Data modeling uses Oasis Montaj for 2D modeling and ZondGM3D for 3D modeling. The subsurface lithology of Mount Sibayak, Karo Regency, can be seen in the subsurface of the research area. There are two types of rock, namely clay rock as a capping rock, which is altered due to hydrothermal flows with susceptibility contrast values ranging from berkisar  (-10 x 10-3) – (-2 x 10-3) SI and rock andesite intrusions containing hydrothermal fluids with susceptibility contrast values ranging from (35 x 10-3) – (50 x 10-3) SI
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%.
Analysis of Soil Vulnerability Level Due to Earthquake in Tarutung Region and Its Surroundings Using Probabilistic Seismic Hazard Analysis Method Pratiwi, Nindya Mirandani; Lubis, Lailatul Husna; Sirait, Ratni Sirait; Sipayung, Reinhard Sipayung
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.v21i1.17157

Abstract

The geotectonic and geological conditions of the Tarutung region, which is crossed by the active Renun and Toru fault lines, cause the region to experience frequent earthquakes. Determination of the maximum ground acceleration (PGA) value is a very important method to see the vulnerability of the soil due to earthquakes in the region. This research uses the PSHA method with a probability of exceeding 2% PE for 50 years or a return period of 2500 years. The data used is earthquake data with a magnitude of 4.3 - 6.4 Mw and a depth of 10 - 250 km starting from 1971 - 2022. This data was obtained from two sources, namely the IRIS catalog and data from BMKG Geophysical Station Class I Deli Serdang. The vulnerability analysis obtained changes the value of peak ground acceleration in bedrock at the condition of T = 0 s (PGA), T = 0.2 s (short period), and T = 1 (long period) with a probability of exceeding 2% in 50 years in bedrock. The results of this study obtained maximum ground acceleration values of 0.3 g - 0.9 g for PGA (T = 0 s), 0.4 g - 0.9 g for a short period (T = 0.2 s), 1.0 g - 1.2 g for long period (T = 1 s). Areas with the highest ground acceleration values are located in Pahe Julu District, Pahae Jae District, and Simangumban District

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