Progressive Physics Journal is a peer-reviewed, open access journal which publishes original research articles as well as short communication in all areas of physics including applied physics, such as Theoretical Physics, Material Physics, Electronics & Instrumentation, Medical Physics, Computational Physics and Modeling, Geophysics, Oceanography, and other relevant branches of Physics. It is published twice a year, i.e., in June and December. slot slot88 toto togel slot gacor slot gacor
Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman
Application of Physics-Informed Neural Networks (PINNs) for the Numerical Solution of the Time-Independent Schrödinger Equation
This work investigates the application of Physics-Informed Neural Networks (PINNs) for numerical solutions to the time-independent Schrödinger equation of the quantum harmonic oscillator in one, two, and three spatial dimensions. Fully connected neural architectures are constructed to approximate wavefunctions over finite symmetric domains, while the corresponding energy eigenvalues are treated as trainable parameters. The training strategy utilizes randomly sampled interior points to enforce the Schrödinger operator residual and boundary points to impose vanishing wavefunction constraints. For the 1D quantum harmonic oscillator, the learned ground-state wavefunction yields an energy of E = 1.2939 after 12,000 iterations. In the 2D configuration, convergence is achieved at E = 2.1352 within 14,000 iterations, whereas the 3D model attains E = 2.6377 after 12,000 iterations. These values agree with the expected trend of increasing ground-state energy with dimensionality, although deviations from exact analytical values indicate that PINNs may experience optimization challenges and sensitivity to sampling density and boundary enforcement. Despite these limitations, the trained models successfully capture the characteristic spatial symmetries and Gaussian-like envelope of harmonic oscillator eigenstates across all dimensions. These findings demonstrate that PINNs offer a flexible, mesh-free alternative for solving stationary quantum systems, particularly when analytical or conventional numerical approaches become impractical. The method shows strong potential for higher-dimensional quantum applications, even though further refinement such as improved sampling, loss balancing, and network depth remains necessary to suppress residual error and enhance eigenvalue accuracy.
Copyright (c) 2025 Progressive Physics Journal https://creativecommons.org/licenses/by-sa/4.0
Pengaruh Variasi Surfaktan terhadap Struktur, Morfologi, dan Aktivitas Katalitik TiO₂ Mesopori yang Disintesis dengan Metode Kopresipitasi
This study examines the effect of different surfactants: Cetyltrimethylammonium Bromide (CTAB), Didodecyldimethylammonium Bromide (DDAB), and Methyltrioctylammonium Bromide (MTAB) on the synthesis of mesoporous TiO2 using the co-precipitation method. Characterization was performed using Raman Spectroscopy, BET (Brunauer-Emmett-Teller) surface area measurement, Differential Scanning Calorimetry (DSC), and X-ray Diffraction (XRD) techniques. The results indicate that the highest surface area was achieved by CTAB 98.32 m2/g, while MTAB yielded the greatest pore volume 0.2517 cc/g and the largest average pore diameter 10.498 nm. Furthermore, a simple catalytic activity test was performed through the degradation of methylene blue under UV irradiation, which showed that the TiO2–MTAB sample had the highest degradation rate of 0.032 min-1. This indicates a positive correlation between pore size and photocatalytic efficiency.
Identifikasi Ketebalan Tanah Gambut Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner
Peat soils are organic deposits that have a high carbon content. West Kalimantan is the second largest province in Kalimantan with a total peat ecosystem of around 1,729,980 Ha. In 2018, it was recorded that the peat area in West Kalimantan Province was 1,543,752 Ha. Its utilization in this province has increased every year although it has not yet reached a large area. Identification of peat thickness can be done with the resistivity geoelectric method. In this study, subsurface modeling was carried out using the Wenner configuration to determine the thickness of the peat layer. The modeling results are in the area of Perdana Street, Bansir Darat Village, Southeast Pontianak. The depth of the peat layer in the research area was found at a depth of 1.30 m to reach more than 5.5 m with a range of peat layer resistivity values obtained in the range of 131 Ωm - 267 Ωm. The clay layer is found at a depth of 1.31m - 8m. with a resistivity value range of 1.80 Ωm - 131 Ωm.
Identifikasi Struktur Bawah Permukaan Daerah Potensi Panas Bumi Di Daerah Tulehu Menggunakan Metode Gravitasi
Indonesia has great geothermal potential, Indonesia is located in the path of volcanoes or the ring of fire can also be called the ring of fire. Maluku Province, especially the Ambon and Seram islands, has geothermal energy potential that can be developed as an alternative renewable source. One of the geothermal potentials located in the Maluku islands is WKP Tulehu which has a fairly high temperature reaching 134.09°C–251°C. One method that can be used to identify the subsurface layer of geothermal areas is the gravity method using GGMPlus gravity data. The 2013 Global Gravity Model Plus (GGMPlus) secondary gravity data is a global gravity model data that has ultra–high resolution with grid spacing between data points ~220 m in the north–south direction. The results of the identification of geological structures using gravity methods using regional anomaly values with a range of 80.7–101.3 mgal. The depth of the regional anomaly in the study area is estimated to be 1.862 km deep. There are 7 faults found in the 4 research cross sections. These faults are located in cross section A–A' at a distance of 8.30 km, cross section B–B' at a distance of 1.9 km and 5.1 km, cross section C–C' at a distance of 2.450 km and at a distance of 11.6 km, and cross section D–D' 2.248 km and 4.5 km.
Analisis Struktur Bawah Permukaan Daerah Panas Bumi Pacitan Berdasarkan Data Gravitasi GGMPlus
This study aims to identify the subsurface structure of the geothermal system in the Pacitan area, East Java, using gravity methods based on GGMPlus data. The analysis procedures include terrain correction to obtain the Complete Bouguer Anomaly (CBA), separation of regional and local anomalies through upward continuation, as well as two-dimensional (2D) modeling and Second Vertical Derivative (SVD) analysis to identify fault structure. The CBA values in the study area range from 107 to 115.5 mGal, where high anomalies correlate with volcanic breccia rocks and highlands, while low anomalies indicate the presence of sandstone in lowland areas. Geothermal manifestations in the form of hot springs exhibit gravity anomalies of approximately 110.5–111.5 mGal and are situated in the north of the fault in a northwest–southeast direction. The 2D modeling results reveal the presence of reservoir rocks consisting of sandstone and clay with densities ranging from 1.79 to 2.20 g/cm³, and lava rocks with densities of 2.80–2.90 g/cm³ acting as cap rocks. SVD analysis indicates the existence of a normal fault directly associated with geothermal fluid pathways. This study demonstrates that the GGMPlus gravity method is effective for preliminary exploration of geothermal systems in potential areas such as Pacitan.
Asesmen Potensi Energi Angin Menggunakan Metode Weibull dalam Perencanaan Pembangkit Listrik Tenaga Bayu di Kabupaten Gorontalo, Provinsi Gorontalo
This study presents a rigorous assessment of wind energy potential in Gorontalo Regency, Indonesia, through statistical modeling utilizing the two-parameter Weibull distribution applied to hourly wind speed data from 2022 to 2024 across three geographic zones and three elevation levels (50 m, 80 m, 100 m). The model exhibited strong statistical agreement with observed data, evidenced by high variation (R² > 0.9869) and low RMSE values (< 0.011), confirming its robustness in capturing wind behavior. Mean wind speeds, along with key Weibull-derived metrics—most probable wind speed (vmp) and wind speed for maximum energy contribution (vme)—showed a positive correlation with altitude, where zone 1 recorded the highest vme at 7.45 m/s at 100 m. Derived power density values indicated that Zones 1 and 3 fall within the "acceptable" classification (130.52 W/m² and 115.58 W/m², respectively), validating their technical viability. Simulated performance of the Goldwind GW 140/3.4 wind turbine revealed that Zone 1 yielded the highest annual energy output (Eout) of 10.34 GWh with a corresponding capacity factor (Cf) of 11.56%, followed by zones 3 and 2, which, while exhibiting lower outputs, maintained operational feasibility for decentralized small-to-medium scale deployment. Wind rose analysis confirmed predominant southeast and southern wind flows across all zones, offering critical input for optimizing turbine orientation. Collectively, the findings substantiate that zones 1 and 3 present favorable wind regimes for sustainable wind energy development, offering a data-driven foundation for future investment and regional energy planning.
Copyright (c) 2025 Progressive Physics Journal http://creativecommons.org/licenses/by-sa/4.0
Preliminary Investigation of pH-Dependent Optical Properties of Curcumin-Derived Carbon Dots
Carbon dots (CDs) are photoluminescent nanoparticles smaller than 10 nm with excellent optical properties, including high photostability, UV and visible light absorption, water solubility, low toxicity, and good biocompatibility. These features make them attractive for biomedical, optoelectronic, and catalytic applications. Curcumin, a polyphenol from turmeric, possesses anti-inflammatory, antibacterial, anticancer, and antiviral properties, but its poor water solubility limits its biomedical use. In this study, CDs were synthesized from curcumin and urea via a solvothermal method at 140 °C for 180 minutes to improve curcumin's solubility. The effect of pH on the optical properties of CDs was investigated by adjusting acidity with citric acid and alkalinity with NaOH. UV-Vis and photoluminescence (PL) spectroscopy revealed that the optical properties of CDs are strongly influenced by pH, likely due to the presence of keto-enol tautomerism in curcumin. The pH sensitivity of these curcumin-derived CDs highlights their potential for biomedical applications such as photothermal therapy, bioimaging, drug delivery, and antiviral agents.
A Analisis Dosis Paparan Radiasi Sekitar Ruang Pemeriksaan CT-Scan
This thesis focuses on the analysis of radiation exposure around the CT-Scan room of Radiology Installation of Abdoel Wahab Sjahranie Samarinda Hospital. This study aims to determine the level of radiation exposure in the surrounding area and evaluate the level of exposure according to BAPETEN's safe limits. In addition, this thesis tries to identify areas with radiation potential that exceeds the safe limit and find out the cause. The research method includes data collection by direct measurement using a surveymeter. The results obtained show significant variations in exposure levels at each location. In the operator's room, the dose rate of 1.62 mSv/h exceeded the permissible limit for radiation workers, which was likely due to proximity to radiation sources and suboptimal protection. In the ultrasound room, the dose rate was 0.497 mSv/hour. This value is still below the controlled area limit but above the public safety limit of 0.1 mSv/hour. In the hallway, the measured dose rate was 0.462 mSv/hr which also exceeded the public limit, requiring access restrictions for the public. The garden area showed a dose rate of 0.604 mSv/hour, with high exposure for areas that may be accessed by the public. Therefore, practical recommendations include the addition of shielding, access restrictions, and installation of warning signs to reduce exposure in areas frequently accessed by the public.
Tinjauan Struktur Dan Karakter Mineral Padatan Dengan Menggunakan Metode X-Ray Diffraction (XRD): Review Singkat
Indonesia is rich in various types of rocks, including igneous, sedimentary, and metamorphic rocks. Igneous and metamorphic rocks are commonly found in several regions of Indonesia, making the mineral resources of these rocks have significant potential in the country. X-ray diffraction (XRD) technique has advanced greatly in material characterization. The purpose of this research is to review various studies that discuss mineral characterization of rocks using XRD, as well as to examine different sample preparation methods, interpretation of XRD diffraction patterns, and how this technique is used to determine the mineral composition and crystallographic properties of materials in various types. The research methods used are highly varied for material processing, such as calcination, magnetic separation, slow evaporation, and grinding. The data variables obtained from this study include minerals, sample collection methods, structure, diffraction angles, composition, and their applications.
Identifikasi Struktur Bawah Permukaan Area Tempuran, Magelang, Jawa Tengah dengan Metode Gravitasi GGMplus
This research was conducted in the Tempuran geothermal manifestation area, Magelang, Central Java, specifically in a location with indications of fault structure. The study aims to identify the subsurface structural conditions associated with the fault through the distribution pattern of gravity anomalies. This research used gravity method, with the data are gravity disturbance from GGMplus with a resolution of approximately 220 meters. The gravity disturbance data were processed to obtain Complete Bouguer Anomaly (CBA) data, which were then subjected to upward continuation and forward modeling. The CBA results reveal a high anomaly in the southern part of the study area, extending southwestward, which correlates with the Menoreh Mountains. A low anomaly is found in the northeastern part of the area, corresponding to a lowland region. The 2D modeling results indicate that the study area is composed of rocks with densities ranging from 1.00 g/cm³ to 1.60 g/cm³, interpreted as alluvium; 1.75 g/cm³ to 2.73 g/cm³, interpreted as the Kebobutak Formation; and 2.50 g/cm³, interpreted as deposits from the young Sumbing Volcano. Additionally, rocks with densities ranging from 2.40 g/cm³ to 2.77 g/cm³ are interpreted as andesitic intrusions, while rocks with a density of 2.83 g/cm³ are interpreted as dacitic intrusions. The presence of a normal fault is identified within the Kebobutak Formation and the andesitic intrusion, overlain by alluvial deposits.
Bioplastik dari Limbah Pelepah Sawit:Tinjauan Potensi dan Tantangan dalam Pengembangan Material Ramah Lingkungan
Limbah pelepah sawit merupakan produk sampingan dari industri kelapa sawit yang memiliki potensi besar untuk diolah menjadi bioplastik. Bahan ini dapat dimanfaatkan sebagai alternatif plastik ramah lingkungan. Artikel ini menyajikan tinjauan komprehensif mengenai potensi bioplastik berbasis limbah pelepah sawit, termasuk karakteristik fisik, mekanik, dan biodegradabilitasnya. Berbagai metode pengolahan, seperti ekstraksi, modifikasi, dan proses pencampuran dengan polimer lain, dieksplorasi untuk meningkatkan performa bioplastik. Komponen utama dalam pelepah sawit, seperti selulosa, hemiselulosa, dan lignin, berkontribusi terhadap performa material bioplastik. Selain itu, artikel ini membahas tantangan yang dihadapi dalam pengembangan bioplastik. Tantangan utama dalam pengembangan bioplastik ini meliputi biaya produksi yang tinggi, variasi kualitas bahan baku, dan perlunya penelitian lebih lanjut untuk meningkatkan kinerja material dalam aplikasi praktis. Hasil tinjauan ini diharapkan dapat memberikan wawasan bagi peneliti dan industri untuk mengeksplorasi lebih lanjut potensi limbah pelepah sawit sebagai sumber bioplastik yang berkelanjutan dan ramah lingkungan.
Evaluasi Alat Dosimeter untuk Penelitian Radionuklida pada Kedokteran Nuklir
Radionuclides are widely used in nuclear medicine for diagnosis and therapy, but precise measurement of radiation dose is essential to keep patients and medical personnel safe. Dosimeters play a key role in measuring and evaluating radiation dose. This article discusses various types of dosimeters that are often used, such as Thermoluminescent Detectors (TLD), Optically Stimulated Luminescence Dosimeters (OSLD), and Radiochromic films (Gafchromic EBT3). The discussion covers how each device works, advantages, disadvantages, and performance. The review shows that each dosimeter has certain advantages: TLD is suitable for personal dose measurement, OSLD is effective for monitoring exposure in the work environment, and Gafchromic EBT3 helps visualise dose distribution in radiation therapy. The article also emphasises the need for innovation in dosimetry technology to improve accuracy, efficiency and safety. This review is expected to serve as a guide for researchers and practitioners in choosing the right dosimeter, while encouraging the development of better technologies to support safe and effective nuclear medicine.
In Vivo Dosimetry pada Radioterapi Menggunakan Teknik Modulated Arc Therapy (VMAT) dan Intensity Modulated Radiation Therapy (IMRT)
Radiation therapy is an effective method for treating cancer by using ionizing radiation to kill cancer cells or treat tumors. In radiation therapy planning, effective techniques are essential to ensure maximum dose to the tumor while protecting surrounding healthy tissue. In vivo dosimetry (IVD) measures the radiation dose received by cancer patients during therapy to ensure accurate delivery. This study reviews prior research comparing various dosimeters used in Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiation Therapy (IMRT). The methodology involved a literature review of articles published between 2013 and 2023, focusing on in vivo dosimetry in VMAT and IMRT. The articles were sourced from databases like Google Scholar, ResearchGate, ScienceDirect, Elsevier, and PubMed. The findings suggest that dosimeter EPID shows significant effectiveness in detecting and verifying radiation doses in both VMAT and IMRT. Overall, VMAT demonstrates superior accuracy, consistent dose distribution, and better dose limitation to at-risk organs compared to IMRT. This study supports the use of VMAT for enhancing safety and accuracy in radiation therapy, providing a framework for policy improvements in radiotherapy services.
Aplikasi Sistem Informasi Geografis (SIG) Untuk Pemetaan Tingkat Kerawanan Longsor Di Kota Bandar Lampung
The research entitled "Geographic Information System (GIS) Application for Landslide Prone Level Mapping in Bandar Lampung City" is motivated by data obtained from BPBD in 2018, there are at least 15 sub-districts in Bandar Lampung which are indicated as landslide-prone areas because they have hills and valleys that are quite dangerous. For this reason, it is necessary to create a landslide prone zone map to produce information about the position related to the level of landslide vulnerability in the city of Semarang. This map can be used as a reference material in decision making to prevent landslides in vulnerable areas, thus reducing the number of casualties and material as well as planning in the development of facilities and infrastructure. This research uses remote sensing image data and GIS (Geographic Information System) by weighting the parameters that affect landslide occurrence, namely: slope, land cover, soil type, and rainfall. The result of this research is a landslide vulnerability map divided into 4 vulnerability classes, namely: low, medium, high, and very high. And the information obtained from the 4 factors, the potential for landslides in Bandar Lampung City is divided into 4 characteristics of landslide prone zones, namely low level zones in 7 sub-districts, medium level in 9 sub-districts, high level in 5 sub-districts, and very high level in 7 sub-districts.
Karakterisasi Sifat Absorbansi Material Menggunakan Metode Spektrofotometri Sinar Ultra Violet dan Visible (UV-Vis) Pada Material Organik: Review Singkat
In general, organic materials have been studied to have many benefits. One of the benefits of organic materials is that they can be used as the main ingredient for making sunscreen or sun protection, active ingredients in semiconductors, bioreductors, natural coloring materials and others. The Ultra Violet and Visible Light Spectrophotometry (UV-Vis) technique is a technique that has been widely used in research, especially in knowing the potential utilization of organic materials. The purpose of this research is to review various studies that discuss the characterization of organic materials using the Ultra Violet and Visible Light Spectrophotometry (UV-Vis) method to determine the benefits of organic materials by analyzing absorbance values and wavelengths. The method used was a literature study from October 30, 2024 to December 4, 2024. The variables studied in this research are absorbance properties, wavelength and the benefits of organic materials. The results showed that organic materials such as kalakai sprouts and roots have potential as sunscreen, coffee beans have the highest caffeine content, and breadfruit leaves and moringa leaves function as semiconductor active ingredients. Avocado peels produce high flavonoid levels, and coconut shells are effective as a base material for water filters. Water hyacinth and binahong leaves were used in bioreductors and optical property studies of C-dots, while turmeric, moss, pineapple shells and red cabbage were effective as natural colorants. Chili peppers, cacao pods, kalamansi citrus leaves, and soursop leaves were extracted to determine the levels of active compounds
Pengolahan Citra Digital EKG Rumah Sakit Tk.IV Samarinda
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.
Copyright (c) 2024 Progressive Physics Journal
Hubungan Suhu dan Kelembapan Ruangan Terhadap Sick Building Syndrome (SBS) di UPTD Balai Pengujian dan Sertifikasi Mutu Barang (BPSMB) Samarinda
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.
Klasifikasi Sel Tumor Payudara Menggunakan Algoritma Support Vector Machine (SVM)
Cancer is a large group of diseases that can begin in almost any organ or tissue of the body when abnormal cells grow uncontrollably, beyond their normal limits to invade adjacent parts of the body and/or spread to other organs. There is a lot of information about breast cancer that can be accessed easily. Information about breast cancer can be processed with machine learning. Machine learning can discover new meaningful correlations, patterns and trends by sifting through large amounts of data stored in repositories, using pattern recognition technology and statistical and mathematical techniques. The purpose of this research is to determine the value of the accuracy of the SVM model on training data and testing data; and to determine the precision value of the SVM model on training data and testing data. Wisconsin Breast Cancer (WBC) data available in the UCI Machine Learning Repository. The data have been processed using the Python programming language with a support vector machine (SVM) modeling algorithm. The results of this research indicate that the value of accuracy in training data was equal to , the value of accuracy in testing data was equal to , and the value of precision in the SVM model algorithm was obtained as large as for training data and as large as for data testing.
: Analisis Persebaran Intensintas Penerangan Di Laboratorium Balai Keselamatan Dan Kesehatan Kerja (K3) Samarinda Berdasarkan PERMANKER No. 5 Tahun 2018 Menggunakan Metode Mapping
A light is needed by humans to recognize an object visually. Good lighting allows people to see the objects they are working on clearly and quickly. There is a national standardization that is used as a race for the intensity of lighting that is categorized based on the type of work performed. Therefore, this study aims to determine the level of intensintas lighting in the Laboratory of the Center for Occupational Safety and health (K3) Samarinda based PERMENAKER No. 5 of 2018. In this study using the mapping method used as the determination of the coordinate points and then use the Lux meter EC 1 and Laser Meter Distance for data retrieval illumination. The results obtained the intense level of illumination in the Laboratory of the Center for Occupational Safety and health (K3) Samarinda based on PERMENAKER No. 5 of 2018 (lighting standards according to job classification) the work areas that meet the standards are on the administration workbench, pretreatment table (Room 8), and fume hood laying room (Room 7) while the work areas of the weighing room (Room 1), UV-VIS room (Room 2), Spectrophoto room (Room 3), Natural absorption room (Room 4), and solid chemical room (Room 5) did not meet the standards.
Studi Kualitas Fisis Air Sungai Leang Lonrong Kawasan Karst Pangkep Taman Nasional Bantimurung Bulusaraung
This research is an experimental research with a survey type aimed to analyse water quality of the Leang Lonrong River reviewed from smell, taste, Total Dissolved Solid (TDS), turbidity, temperature, color, clarity, and UV index, as well as to describe community activities as factors that influence the water quality of the Leang Lonrong River in its utilization. This study was carried out in the Region Tour Leang Lonrong in the Panaikang Village, Minasatene District, Pangkep Regency, which is one of part Pangkep Karst Area Bantimurung Bulusaraung National Park. In the study, the measurement of water quality for sanitary hygiene needs and public bath reviewed its physical parameters by Regulation Minister Health No. 32 of 2017. Obtained results study that physical parameters water of Leang Lonrong River for sanitary hygiene needs own quality that meets requirement, because the water no smells, no taste, has an average TDS of 6.44 mg/L, an average turbidity of 1.71 NTU, an average temperature of 24.14 °C, and average color 0 TCU. The water of Leang Lonrong River for necessity public bath is no fulfill appropriate water quality standard raw quality. This caused some parameters not to fulfill the standard, namely the parameter of clarity is an average of 0.136 meters deep and UV index parameters more than 3 on at 11:00 a.m and 1:00 p.m in Central Indonesia Time (WITA).
Pengujian Karakteristik Alat Ukur Radiasi Dose Calibrator Menggunakan Sumber Teknesium-99m di Instalasi Kedokteran Nuklir Rumah Sakit Abdoel Wahab Sjahranie Samarinda
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.
Analisis Pengaruh Curah Hujan terhadap Frekuensi Kejadian Banjir di Kabupaten Kotabaru, Kalimantan Selatan
The accumulation of water on the ground is what causes flooding, whereas rainfall is the amount of rainwater collected in a flat area Rainfall and flooding are two related but distinct concepts. While rainfall refers to the amount of precipitation that falls in a particular area, flooding is the result of excessive water accumulation on the ground. Indonesia can be classified as a country with high rainfall due to its average annual rainfall ranging from 2000 to 3000 millimeters. In cases of heavy rainfall, excessive water discharge can occur. This can result in flooding when the land, rivers, or water reservoirs cannot manage the overflow effectively. Flooding is a common occurrence in Kotabaru Regency located in South Kalimantan, as it is a combination of mountainous regions, coastal areas, land areas, and small islands. The objective of the study is to examine whether flooding is always caused by high rainfall in Kotabaru Regency from January 2018 to December 2022. The correlation analysis is part of the research design, which utilizes secondary data collected and analyzed in Microsoft Excel. The findings suggest that moderate intensity rainfall is responsible for 73.3% of floods that occurred between 2018-2022. Moreover, 26.7% of floods occurred when rainfall is less than 20 mm/day. However, other factors such as monsoons, tropical cyclones, and El-Nino Southern Oscillation (ENSO) can affect the variability of rainfall and inffluence the occurrence of flood in the area.
Analisis Kerentanan Gedung Menara FMIPA UNM Berdasarkan Pengukuran Mikrotremor Dengan Metode FSR (Floor Spectra Ratio)
Research has been conducted on vulnerability analysis of Gedung Menara FMIPA UNM based on microtremor measurements using the FSR (Floor Spectra Ratio) method. The purpose of this study was to analyze the data from microtremor measurements using the FSR (Floor Spectra Ratio) method so that natural frequency, amplification, and vulnerability values of Gedung Menara FMIPA UNM were obtained. The measurements were made using a set of portable measuring instruments TDL 303 S Seismograph to record vibrations. Measurements were made at 37 points in the building and 3 points in the area around the building. Recording data is processed using Geopsy with FSR method. The results of the study obtained the natural frequency of the Gedung Menara FMIPA UNM for each component was 1.3047 Hz to 2.3823 Hz in the NS component and 1.0556 Hz to 2.4355 Hz in the EW component. The amplification of the Gedung Menara FMIPA UNM for each component is 306.8593 to 2850.7233 in NS components and 360.975 to 4783.54 in EW components. The vulnerability value of the Gedung Menara FMIPA UNM for each component is to in NS component and to in EW component. Gedung Menara FMIPA UNM has complied with SNI 1726-2002. The 12nd floor is the part with the highest building vulnerability.
Perbandingan Kinerja Dosimeter TLD dan OSL pada Pengukuran Dosis di Radiologi Diagnostik
Radiation dose measurement is crucial for ensuring the safety and optimization of radiology practices. Dose measurement in diagnostic radiology involves a systematic process aimed at accurately quantifying the radiation doses used during radiological procedures, ensuring compliance with safety guidelines. This study aims to evaluate and compare the performance of Optically Stimulated Luminescence (OSL) dosimeters and Thermoluminescent Dosimeters (TLD) in measuring radiation doses during diagnostic radiology procedures. The study utilized a polymethyl methacrylate (PMMA) phantom to simulate the human body. Both OSL and TLD dosimeters were employed to measure radiation doses under clinical exposure conditions. The data collected from both dosimeter types were compared to assess their accuracy, efficiency, and effectiveness in different radiological settings. The results show that OSL dosimeters offer higher sensitivity and faster reading times compared to TLDs. OSL dosimeters also demonstrate a higher level of precision, which is crucial for optimizing radiological procedures. While TLDs still provide reliable results, they require more preparation time and a longer reading process. OSL dosimeters are superior to TLDs in terms of efficiency, sensitivity, and speed, making them a preferred choice for radiation dose measurement in diagnostic radiology and contributing to safer and more accurate radiology practices.
Audit Dosimetri pada Teknik IMRT/VMAT Terapi Radiasi pada Linear Accelarator (LINAC)
Dosimetric audit is crucial in ensuring and improving the quality of radiation therapy, particularly in the field of radiotherapy using techniques such as Intensity-Modulated Radiation Therapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT). This study employs a literature review methodology, analyzing and comparing 15 articles based on dosimeters and modalities. The results indicate that various dosimetric audit methods, including the use of glass dosimeters, Gafchromic films, ion chambers, and EPID, provide accurate results in measuring doses for IMRT and VMAT techniques using LINAC. Most studies show good success rates, with dose differences between the dosimeter and the planned dose within the tolerance limits of ±5%. However, some studies also report significant dose variations, especially in organs at risk (OAR) and areas with steep dose gradients. This study highlights that routine dosimetric audits and the use of appropriate detection technologies are essential to improving the precision and safety of radiation therapy for patients.
Aplikasi Klinis AI dalam Treatment Planning Radioterapi untuk Brain Tumor
Artificial Intelligence (AI) has emerged as an innovation that plays an important role in radiotherapy, especially in treatment planning. Artificial Intelligence (AI) has great potential to improve the effectiveness and safety of radiotherapy, particularly in treatment planning for brain tumor. The integration of Artificial Intelligence (AI)-based techniques in MRI imaging for radiotherapy planning is a significant advancement that improves the precision and effectiveness of brain cancer treatment. This review collected and analyzed 15 scientific articles, focusing on treatment planning to be analyzed through narrative synthesis to compare and abstract the results of each study to provide an overview of the contribution of AI in improving radiotherapy accuracy. The analysis showed that AI can improve the accuracy and efficiency of brain radiotherapy treatment planning, especially in the form of automatic segmentation, fMRI and DTI data processing. AI enables improvements in brain cancer treatment by optimizing dose planning and reducing radiation exposure to healthy tissue, contributing to more precise therapy and better patient outcomes.
Penggunaan Dosimeter Film,OSL,Dioda, dan Ion Chamber dalam Verifikasi Dosis pada Teknik Modulated Arc Therapy (VMAT)
The Modulated Arc Therapy (VMAT) technique is an advanced radiotherapy method that allows more optimal radiation dose distribution in a shorter radiation time. Several types of dosimeters that are often used for this verification include film dosimeters, OSL (Optically Stimulated Luminescence), diodes, and ion chambers, each of which has advantages and disadvantages. This review was conducted to compare the use of various dosimeters in dose verification using the VMAT technique, with a focus on the advantages and disadvantages of each tool. This research is based on a literature study of 15 articles. The literature study was carried out for 2 months. The article is limited to a discussion of environmental influences on air quality. The articles used were taken from 2015 to 2023. The results of this study show that although all types of dosimeters have advantages, selecting the right dosimeter is very dependent on the specific needs in dose verification on VMAT. Diodes, ion chambers, OSLs, and films perform well in appropriate application contexts, but each has limitations in terms of accuracy, sensitivity, and measurement time. The articles discussed show that OSL and film are more effective in dose measurements in three-dimensional distribution, while diodes and ion chambers are more appropriate for point dose measurements.
Analisis Kualitas Citra Tegangan 48 kV dan 50 kV Pesawat Sinar-X Pada Pasien Covid-19 dengan Menggunakan Software Image-J
The process of analysing the quality of radiographic images produced by X-rays with 48 kV and 50 kV tube voltages in Covid-19 patients using ImageJ software has been carried out. The images analysed are the results of thoracic radiographic examinations using the same electric current strength in Covid-19 patients with 48 kV and 50 kV voltage variations. The image results come from converting the analogue format to digital format for further processing. The analysis method uses the FFT (Fast Fourier Transform) method and histogram analysis. Image quality was assessed based on pixel distribution, contrast and SNR (Signal to Noise Ratio) parameters. Visualisation of the distribution can be seen based on histogram analysis. In the histogram, the prominent intensity shows the pixel intensity and the peak width shows the contrast range in the image. If the histogram graph is distributed in the minimum area, the image tends to be dark and vice versa, if the histogram graph is more in the maximum area, the image tends to be bright. The results show that the 48 kV voltage has a more even distribution but has low contrast and SNR values compared to the 50 kV voltage. The results of this study provide an overview of the selection of kinetic parameters in patients and optimisation of X-ray technical parameters to obtain maximum image quality in radiographic diagnosis.
Analisis Indeks Resonansi dan Kerentanan Jembatan Rel Kereta Api Maros-Barru Berdasarkan Data Mikrotremor (Studi Kasus Jembatan WTT Maccini Baji)
This research is a quantitative descriptive research that aims to analyze the value of natural frequency and amplification factor, as well as knowing the level of resonance and vulnerability of WTT Maccini Baji Railway Bridge. This research was conducted on the Maros-Barru Railway Line, especially the WTT Maccini Baji Railway Bridge, Lau District, Maros Regency, South Sulawesi Province. Data collection was carried out at 8 points (4 points on the bridge and 4 points on the ground around the bridge) with two measurement times at each point, day and night. Processing of microtremor data using Geopsy software with the HVSR (Horizontal to Vertical Spectral Ratio) method to obtain HVSR curves that produce natural frequency and amplification values. The results showed natural frequency values ranging from 2,36 – 6,64 Hz and amplification values ranging from 2,67 – 15,92. The resonance index value of the Maccini Baji WTT Bridge obtained ranges from 30,68% – 181,49% and is included in the low resonance classification which indicates the bridge has a solid structure and is safe from potential damage due to resonance. While the seismic vulnerability index is obtained with a value of 2,07 – 77,35 which shows that the high seismic vulnerability classification is more dominant at the point located on the ground.
Sintesis Adsorben Ampas Teh sebagai Penyerap Ion Logam Berat Timbal dalam Air
Heavy metal pollution is still a serious problem today. One method that can be used to remove heavy metal content from water is the adsorption method. In the adsorption method, the choice of adsorbent is very important to optimize the adsorption process. One of the materials that can be used as an adsorbent is tea waste. Tea waste contains cellulose, which can be used to bind heavy metal ions. This research was conducted to synthesize adsorbents using tea waste and then test their ability to adsorb lead ions. The adsorbent synthesis process is divided into several stages, namely washing, drying, refining, soaking in HCl solution, and drying again. The results of the adsorption tests conducted found that the tea waste adsorbent could remove 99% of the lead metal ion content in the water. The conclusion from these results is that the synthesis process has succeeded in making tea waste adsorbent that can adsorb lead ions in water.