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INDONESIA
Komunikasi Fisika Indonesia
Published by Universitas Riau
ISSN : 14122960     EISSN : 2579521X     DOI : 10.31258/jkfi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
KFI mempublikasikan artikel hasil penelitian dan review pada bidang fisika, namun tidak terbatas, yang meliputi fisika murni, geofisika, plasma, optik dan fotonik, instrumentasi, dan elektronika, dan fisika terapan (aplikasi fisika).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 15 Documents
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Search results for , issue "Vol 22, No 2 (2025)" : 15 Documents clear
Relation of reflectance intensity and chemical contents of oil palm fresh fruit bunches using multispectral imaging Arpyanti, Nisa; Shiddiq, Minarni; Setiadi, Rahmondia Nanda; Rabin, Mohammad Fisal; Harmailil, Ihsan Okta; Dasta, Vicky Vernando
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.149-156

Abstract

Multispectral imaging has been widely used for the classification of fruits and vegetables. This technique offers both spectral and spatial resolution, enabling the evaluation of fruit quality based on its chemical properties. This study aims to analyze the relationship between reflectance intensity obtained from multispectral imaging and the chemical composition of oil palm fresh fruit bunches (FFBs), specifically oil content and free fatty acid (FFA) levels, measured using the Soxhlet extraction method. The multispectral imaging system consists of a monochrome camera and an LED light source with eight wavelengths ranging from 680 nm to 900 nm. FFB images were processed using Python scripts to extract reflectance intensity. The Python scripts were also used to analyze the correlation between reflectance intensity and both oil content and FFA levels. A total of 15 unripe and 15 ripe FFB samples were used. Correlation analysis was focused on the 780 nm wavelength due to its high reflectance intensity. The results showed that the correlation coefficient between reflectance intensity and oil content was r = -0.39 for unripe fruits and r = 0.29 for ripe fruits, while the combined data yielded a strong correlation of r = 0.92. For FFA, the correlation was r = -0.41 for unripe fruits, r = -0.34 for ripe fruits, and r = 0.72 for the combined dataset. These findings demonstrate that multispectral imaging is a promising non-destructive method for classifying the ripeness of oil palm FFBs based on oil content and FFA levels.
Literature study on the evaluation of lead apron thickness in radiology service units Edward, Sharon Gracia
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.61-66

Abstract

Radiation protection is an effort that can be undertaken to reduce the dangers of radiation. The ALARA principle of radiation protection is needed to minimize the radiation exposure received by workers based on three components: exposure time, distance, and the use of protective equipment. Therefore, an analysis of the effectiveness of lead aprons in protecting workers from radiation exposure is conducted. The method employed involves conducting a literature review on three journals discussing the effectiveness of lead aprons in protecting workers from radiation exposure based on varying apron thicknesses and exposure factors. At 100 kVp tube voltage, a lead apron with 0.25 mmPb thickness and exposure time of 100 mAs has an effectiveness of 25% (15 years old) and 98.1% (3 years old), while a thickness of 0.35 mmPb with an exposure time of 5 mAs has an effectiveness of 93%. At 70 kVp tube voltage, a lead apron of 0.35 mmPb thickness with an exposure time of 5 mAs has an effectiveness of 98.4%. A 0.5 mmPb lead apron with exposure times ranging from 20 mAs to 72 mAs has an effectiveness between 93.75% and 99.219%. The effectiveness of a lead apron is influenced by tube voltage, exposure time, age, and quality of the lead apron. A thick apron does not necessarily have high effectiveness in protecting workers if it has poor quality, and vice versa.
Preliminary study on the utilization of cabbage waste as a raw material for activated carbon in supercapacitor applications Syahputri, Intan; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.97-104

Abstract

This study aims to utilize cabbage waste as an active carbon material for supercapacitor electrodes through an environmentally friendly approach without chemical activation. The fabrication process includes pre-carbonization at 200°C for 1 hour, carbonization at 600°C, and physical activation at 850°C. The resulting carbon material exhibits a porous structure essential for ion storage, despite the absence of chemical activation. Electrochemical testing using the galvanostatic charge-discharge method with Na2SO4 electrolyte concentrations of 0.5 M, 1 M, and 1.5 M demonstrated a highest specific capacitance of 155.87 F/g at 1.5 M concentration. The increase in electrolyte concentration enhances ion mobility and charge storage capacity. This research indicates that cabbage waste can serve as an effective active carbon source for supercapacitors, with further performance improvements expected through chemical activation in future studies.
Bioelectricity and biomagnetism as keys to realization of neurotechnology Erwin, Erwin; Taer, Erman; Afrinal, Afrinal
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.157-168

Abstract

The importance of bioelectricity and biomagnetism in neurotechnology has been outlined in this study. There are three main processes in neurotechnology, namely: signal delivery, data storage and data processing. These neurotechnological processes require three essential things, namely measurements, tools and materials. This scientific study describes the form of signal delivery in neurotechnology, the form of data storage and the form of data processing. The measurement methods that can be applied have also been described along with the tools and materials. Bioelectricity plays a very important role in building neurotechnology. Meanwhile, biomagnetism is an important aspect that cannot be separated from the phenomenon of bioelectricity which also supports systems in neurotechnology. The phenomena of bioelectricity and biomagnetism in neurotechnology are described in this study along with measurement devices and materials. Measuring devices and materials must be modified as conditions permit in their working conditions. It has also been studied that natural neurotechnological data storage in living creatures is through muscle memory, signal delivery occurs in the form of bioelectricity and data processing is a combination of data delivery and storage. This study also examines the future prospects of neurotechnology along with its moral aspects.
A medical physics review of the use of contrasodium in hysterosalpingography (HSG) examinations Akbar, Aidil; Habib, Alltop Amri Ya; Simanjuntak, Asnika Putri; Emrinaldi, Tengku
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.85-96

Abstract

Hysterosalpingography (HSG) is a widely used radiological procedure for evaluating female infertility, particularly in assessing fallopian tube patency and uterine anatomy. A critical component of HSG is the use of contrast media. Water-based contrast agents, such as contrasodium, are often preferred due to their favorable safety profile. The field of medical physics plays a vital role in ensuring diagnostic image quality while minimizing biological risks from radiation exposure. This article reviews the effectiveness of contrasodium in HSG procedures from a medical physics perspective, comparing it to other contrast agents and examining radiation dose management in women of reproductive age. The study is a literature review of scientific publications from the past decade (2015–2024), including clinical trials, meta-analyses, and international guidelines from the WHO and ICRP. The analysis focuses on imaging physics parameters, contrast efficiency, biological safety, and radiation dose evaluation. Findings indicate that contrasodium provides sufficient radiological imaging with minimal biological risk. Although oil-based contrast agents are associated with higher post-HSG pregnancy rates, they pose greater risks of adverse biological effects. Medical physicists are instrumental in optimizing imaging protocols, managing radiation doses, and selecting exposure parameters in accordance with the ALARA (As Low As Reasonably Achievable) principle. In conclusion, the use of contrasodium in HSG offers an optimal balance between diagnostic efficacy and patient safety. The standardization of evidence-based HSG protocols at the national level is recommended to enhance clinical practice in Indonesia.
Preliminary study on the potential use of Averrhoa bilimbi L. as a supercapacitor electrode material Rahmi, Lailatul; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.125-132

Abstract

The global energy crisis and environmental damage caused by the use of fossil fuels have driven the development of environmentally friendly energy storage technologies, one of which is the supercapacitor. This study aims to explore the potential of Averrhoa bilimbi L. (belimbing wuluh) as a source of activated carbon for supercapacitor applications. Activated carbon from belimbing wuluh pulp was synthesized through a carbonization process at 800°C. Morphological characterization using SEM showed a porous surface that had not yet developed optimally, while EDX analysis identified carbon, oxygen, and magnesium as the dominant elements. Electrochemical characterization was carried out using CV and GCD methods with variations in H2SO4 electrolyte concentration (1, 2, and 3 M). The electrode tested with 1 M showed the best performance, with a specific capacitance of 45.98 F/g (CV) and 96.81 F/g (GCD). These results indicate that belimbing wuluh has potential as a sustainable natural material for the development of environmentally friendly supercapacitors.
Synthesis and characterization of optical properties of barium titanate (BaTiO3) with the addition of moringa, banana, matoa, and ketapang leaves extracts Dewi, Rahmi; Apriwandi, Apriwandi; Hamzah, Yanuar; Sari, Eza Tirta; Butarbutar, Kheny Kernila; Putri, Nadja Melika; Nathania, Nazhiwa; Aritonang, Surya Ardika; Hartini, Titin; Hayati, Fitri; Maslyah, Maharani Nur; Sawitri, Seli Novalin; Komariah, Siti; Nursyahara, Septia; Nuraini, Nasywa; Aisy, Rihla Datul; Safira, Putri; Rusmanianty, Rusmanianty; Pratiwi, Dinda; Adela, Adela; Pasaribu, Veny Sriulina; Azhara, Vina Naomi; Febrita, Ayang
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.169-174

Abstract

Environmentally friendly synthesis of barium titanate (BaTiO3) nanoparticles was conducted using natural leaf extracts of Moringa oleifera, Musa spp., Pometia pinnata, and Terminalia catappa as green dopants via the sol-gel method. This study aims to evaluate the influence of different leaf extracts on the optical properties of BaTiO3 characterized by UV-Vis spectroscopy. Each sample exhibited distinct absorption spectra, reflecting variations in phytochemical composition among the extracts. The results showed that Terminalia catappa and Pometia pinnata extracts produced the highest band gap values, 3.36 eV and 3.35 eV respectively, indicating optical activity in the ultraviolet region. Musa spp. extract resulted in a band gap of 2.81 eV, while Moringa oleifera extract yielded the lowest value of 2.59 eV. These differences suggest that the type of plant extract significantly affects the optical characteristics of the synthesized BaTiO3. This research highlights the potential use of local biomass in the development of functional BaTiO3-based materials through green synthesis approaches.
Evaluation of noise values and homogenity of CT scan image results on head phantom after daily calibration Samaliwu, Evelin Trivena; Illya, Gregoria
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.105-110

Abstract

Evaluation of CT scan image quality is a crucial aspect in ensuring accurate medical diagnosis. This research aims to evaluate noise values and image homogeneity of CT scans on a head phantom after daily calibration. Evaluation of these two parameters is critical because high noise can interfere with image contrast and lead to clinical misinterpretation, while low homogeneity may indicate artifacts or system inconsistencies that potentially reduce diagnostic reliability. Measurements were performed using Region of Interest (ROI) at five points (one in the center and four at the edges at 12, 3, 6, and 9 o'clock positions) across six image slices, for both head and body modes. The CT scan system used was Siemens SOMATOM go.Top, with primary scanning parameters for each mode: 120 kV voltage, 265 mA current (head) and 220 mA (body), as well as Hr40f and Br40f kernels. Research results show that the CT number homogeneity values in head mode ranged from -1.96 to 0.81 HU, and in body mode from -1.78 to 1.28 HU; all were within the tolerance limit of 0 ± 4 HU. Noise values for head mode ranged from 3.49 – 3.67 HU and body mode from 4.98 – 5.37 HU, also within standard tolerance limits. These findings indicate that the CT scan system functions properly and meets diagnostic imaging quality standards. Additionally, these results support the importance of implementing periodic quality control as part of improving radiological service quality and strengthening patient safety standards in medical facilities.
Comparison of electrochemical performance of supercapacitor electrodes based on electrolyte solution variation Purba, Rosianna; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.133-140

Abstract

The increasing global energy demand has accelerated the progress of renewable energy technologies and the creation of effective energy storage solutions such as supercapacitors. In this study, biomass obtained from the peel of the matoa fruit (Pometia pinnata) was employed as a raw material to produce activated carbon for supercapacitor electrodes. The preparation process consisted of an initial carbonization step, followed by chemical activation using a 0.7 M potassium hydroxide (KOH) solution, and then additional carbonization and physical activation stages. The synthesized material was characterized through density measurements and electrochemical testing, including cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods, conducted with KOH electrolytes at concentrations of 2, 4, and 6 M. Results demonstrated that combining chemical activation with pyrolysis yielded better outcomes than physical activation alone, as shown by a decrease in activated carbon density, indicating enhanced porosity and surface area. CV analysis revealed that increasing the KOH electrolyte concentration improved the supercapacitor’s performance, reflected in higher specific capacitance during charge-discharge cycles. Moreover, GCD experiments showed that electrodes treated with 6 M KOH electrolyte achieved the greatest specific capacitance, energy density, and power density, recorded at 170.52 F/g, 23.68 Wh/kg, and 580.00 W/kg, respectively. These findings highlight that activated carbon derived from matoa fruit peel is a highly promising material for supercapacitor electrodes, combining excellent electrochemical characteristics, efficiency, and stable cycling behavior.
Literature study on the effect of exposition factors on image quality in the aspect of gray degree Theos, Nicholas Austrin
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.67-72

Abstract

This literature study aims to examine the influence of exposure factors on the quality of radiographic images in the field of radiodiagnostics. Three scientific journals were used as research materials, focusing on adjusting tube voltage (kV) and exposure time (mAs) to optimize image quality. Experiments were conducted using Computed Radiography (CR) and Digital Radiography (DR) on different phantoms, such as water in a plastic bag as phantom, ossa manus phantom (hand), and abdominal phantoms. The results of the study indicate that the optimal combination of tube voltage and exposure time varies depending on the density and thickness of the tissues being examined. In conclusion, the proper adjustment of exposure factors is key to obtaining high-quality radiographic images for diagnosing diseases or lesions.

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