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Utama Alan Deta
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Jurnal Penelitian Fisika dan Aplikasinya (JPFA)
Published by Universitas Negeri Surabaya
ISSN : 20879946     EISSN : 24771775     DOI : https://doi.org/10.26740/jpfa
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) is available for free (open access) to all readers. The articles in JPFA include developments and researches in Physics Education, Classical Physics, and Modern Physics (theoretical studies, experiments, and its applications), including: Physics Education (Innovation of Physics Learning, Assessment and Evaluation in Physics, Media of Physics, Conception and Misconceptions in Physics, hysics Philosophy anPd Curriculum, and Psychology in Physics Education); Instrumentation Physics and Measurement (Sensor System, Control System, Biomedical Engineering, Nuclear Instrumentation); Materials Science (Synthesis and Characteristic Techniques, Advanced Materials, Low Temperature Physics, and Exotic Material); Theoretical and Computational Physics (High Energy Physics, Gravitation and Cosmology, Astrophysics, Nuclear and Particle Phenomenology, and Computational and Non-Linear Physics); and Earth Sciences (Geophysics and Astronomy).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol. 14 No. 1 (2024)" : 7 Documents clear
Petrophysical Analysis and Seismic Attribute for Reservoir Characterization in “AMN” Field, Talang Akar Formation, South Sumatra Basin Ayman, M. Alghiffari; Sudarmaji, Sudarmaji; Trisna, Muhammad Destrayuda
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p1-18

Abstract

The AMN field is located in the South Sumatra Basin, where the Talang Akar Formation is proven to be one of the main hydrocarbon reservoirs in the South Sumatra Basin, with the dominant lithology comprising interbedded sandstone and shale. This study aims to determine the depth and distribution of the reservoirs in the Talang Akar Formation using petrophysical analysis and seismic interpretation. Petrophysical analysis was performed using deterministic methods to obtain reservoir depth information vertically. The seismic interpretation was carried out using model-based acoustic impedance inversion and the application of the rms Amplitude attribute to get information on the lateral distribution of the reservoir. The result of petrophysical analysis indicated that the physical parameters in the AMN Field's Talang Akar Formation reservoir zone varied in depth, ranging from 1171.8 m to 1201.5 m, with an average shale content of 30%, water saturation of 70%, and effective porosity value of 15%. Seismic interpretation revealed the lateral distribution of sandstone reservoirs predominantly trending west to south in the study area, indicated by amplitude values ranging from 6,000 to 9,000 and acoustic impedance values from 6,400 to 7,200 (m/s)(g/cc). From this study, integrating petrophysical analysis using deterministic methods, model-based acoustic impedance inversion, and rms Amplitude attribute could provide reservoir distribution information both vertically and laterally.
Analysis of Landslide Potential Based on Magnetic Susceptibility of Rocks Using Geomagnetic Methods in Suka Damai Village, Bulango Utara Subdistrict, Bone Bolango Regency Yunginger, Raghel; Sandi, Febriyanti Yuliana; Setiawan, Dewa Gede Eka; Husen, Maman Hermana; Zulkifli, M; Ardiyanto, Kamal
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p49-66

Abstract

Landslides in Bone Bolango Regency have increasingly impacted the population, with data showing a rise in affected areas from 2020 to 2021. To mitigate these risks, mapping areas with potential landslides is crucial for providing early warnings, although such efforts remain incomplete. Therefore, this research aims to determine the potential for landslides in Bone Bolango Regency, especially in Suka Damai Village. The geophysical method used in this research is the geomagnetic method because it utilizes the magnetic properties of rocks below the surface and can interpret subsurface structures in areas with the potential for landslides. Based on the research results, it was identified that the research location is dominated by diorite and granodiorite igneous rocks, where diorite rocks dominate from the surface to a depth of 40 meters with a susceptibility contrast value of 3 – (2.5) SI. Meanwhile, granodiorite rocks are found at a 20 – 110 m depth with a susceptibility value of 1.5 – 3 SI. Based on 3D visualization, it was found that diorite rock acted as landslide material, and granodiorite rock acted as sliding rock. Besides that, material movement forms slopes caused by shear failure that occurs along one or more landslide planes. This research confirms that the research area is a potential landslide area with a level of stability in category D, which means it is less stable.
The Effect of Myopia on Brain Signals: Insights from EEG Studies Gani, Ernawatil; Rio, Afrioni Roma; Nugraha, Mahendra Kusuma; Haryanto, Freddy
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p19-32

Abstract

Refractive vision disorders, such as myopia, can significantly influence an individual's cognitive performance, particularly their ability to perceive and interpret visual stimuli. Myopia, a common refractive error affecting children and adults, can be assessed using various methods, including electroencephalography (EEG). The primary objective of this investigation was to identify distinctive brain signals associated with myopia. This study delves into analyzing brain signals in myopic individuals by employing EEG data and spectral entropy analysis through MNE-Python. EEG data were collected from five myopic participants during a 10-minute session, both with and without their corrective glasses. The collected data underwent preprocessing and power spectral density calculations. Subsequently, spectral entropy analysis was employed to assess the complexity and distribution skewness of EEG frequency patterns. The results of this study revealed notable differences in brain activity, particularly in the occipital region, between individuals wearing glasses and those without them. This variance could be attributed to the enhanced visual clarity experienced by individuals wearing glasses, enabling them to perceive better and process the visual stimuli presented in the study videos. Specifically, spectral entropy values were lower in children without glasses (averaging 1.0) than those with glasses (averaging 3.5), indicating a higher degree of irregularity in the brain activity of myopic children who do not wear corrective eyewear. In conclusion, this study indicates an increase in brain activity irregularities among children without glasses. The findings suggest that specific factors, such as blinking and hand movements, play a role in exacerbating this irregularity. These findings reveal how myopia affects brainwave patterns and indicate that EEG and spectral entropy analysis can enhance our understanding of refractive vision disorders.
Contextual-Based Bulletin as Media for Learning Renewable Energy Susetyo, Gayuh; Sarwanto, Sarwanto; Sukarmin, Sukarmin
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p84-99

Abstract

Physics is a science that teaches about physical phenomena. To make it easier for students to learn physics in the Merdeka curriculum, appropriate media for learning. "Profil Pelajar Pancasila" in the Merdeka curriculum is Indonesia's response to the 21st-century education paradigm to increase students' critical thinking. This research aimed to determine the effect of contextual learning media in bulletins and PowerPoint on contextual critical thinking ability in terms of curiosity. The research instruments were formative assessment, curiosity questionnaire, contextual teaching module, bulletin, and PowerPoint. The research used an experimental method, which was held in classes of 10 senior high schools; one control class used PowerPoint, and another class used a bulletin as an experiment class. Before the study was done, those instruments were tested in different schools. Data that were taken for this research were critical thinking using assessment and curiosity using questionnaires, but the researcher also documented the study through videos. The data was analyzed using IBM SPSS Statistics and Microsoft Excel, including questions on validity and reliability, normality, homogeneity, two-tailed t-tests, two-way analysis of variance, effect size, and Scheffe. Based on research, using contextual bulletin has a better effect on critical thinking than using learning media, which teachers, namely PowerPoint, always use. The student's results can be improved through innovative media, and this study proves that it effectively increases students' critical thinking by using bulletins as media. This study can become a reference for Merdeka curriculum learning, and the teacher can use it in the school to enrich and enhance the media references that will be used.
Integrating Augmented Reality into Blended Learning for Improved Magnetism Conceptual Understanding Asyhari, Ardian; Dian Yusandika, Ajo; Sharov, Sergii
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p33-48

Abstract

In pursuing innovative educational strategies, this study investigates the integration of Augmented Reality (AR) with blended learning to enhance students' conceptual understanding of magnetism. Utilizing AR as a significant educational tool provides an immersive experience that aids in comprehending complex concepts. At the same time, blended learning combines traditional classroom methods with online resources for a more effective approach. This research employs an experimental design with a pretest-posttest control group involving 60 students from the Islamic University of Raden Intan Lampung enrolled in a physics course on magnetism. The experimental group experienced AR-enhanced blended learning, while the control group received traditional blended learning without AR. Quantitative data analysis included descriptive statistics and the N-Gain test to measure the intervention's effectiveness, with ANOVA used to examine differences in conceptual understanding between the groups. Qualitative data was gathered through semi-structured interviews and analyzed thematically to identify common themes and patterns. The results indicate a significant improvement in the experimental group's understanding of magnetism compared to the control group, highlighting AR's effectiveness in enhancing interactivity and engagement, facilitating the visualization of abstract concepts, and reinforcing the linkage between theory and practical application. These findings offer educators and curriculum developers valuable insights, laying a foundation for future interdisciplinary educational research.    
Exploration of Seasonal Dynamics of Tropical Indo-Pacific Ocean during Dry, Wet and Neutral Years in Indonesia using Composite Method Ariska, Melly; Suhanda, Alfin; Suhadi, Suhadi; Supari, Supari; Irfan, Muhammad; Iskandar, Iskhaq
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p67-83

Abstract

Applying rainfall data for each month from Princeton University from January 1948 to December 2016, the impact of the Pacific El Niño-Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD), which is focused in the Indian Ocean, on rainfall in Indonesia was examined. IOD occurrences are significantly correlated with rainfall, as seen by the simultaneous association of seasonal rainfall anomalies during the peak of the rainy season (NDJ) in Indonesia's dry, wet, and neutral years, as well as other climatic indices in both climates. Rainfall has occurred in parts of South Sumatra, Java, South Kalimantan, Nusa Tenggara, Sulawesi, and East Papua. Meanwhile, ENSO events significantly correlate with rainfall in the southern regions of Sumatra, Java, Kalimantan, Sulawesi, and Papua. El Niño is associated with low sea surface temperature anomalies in the Indonesian Sea and southeast Indian Ocean. The low SST anomaly lowers the mean sea surface level (MSL). It reduces the amount of water vapor in the atmosphere, suppressing atmospheric convection in Indonesia and leading to a very sharp decrease in rainfall. Based on the forecasting and exploration of rainfall patterns in Indonesia described in this study, this research can be used as a reference for the government to prepare preventive measures against extreme global climate change events and to predict hydrometeorological disasters in disaster-prone areas.
Laser-Induced Graphene Oxide on Polyimide Sheet: The Effect of Current Regulation on the Laser Power Stability Martila, Lenny Intan; Suryadi, Suryadi; Nursidik Yulianto; Yuliati Herbani; Isnaeni, Isnaeni; Supardi, Zainul Arifin Imam; Suaebah, Evi; Iyon Titok Sugiarto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p100-112

Abstract

Graphene oxide is a two-dimensional substance that shares the same structure as graphene and can be produced using several methods. The difficulty for green technology lies in developing a cost-effective and efficient method to produce graphene and graphene oxide without relying on chemical processes. A highly sustainable technology involves the use of a laser diode, which is both cost-effective and environmentally friendly. This technique produces a material known as laser-induced graphene/graphene oxide (LIG/LIGO). From a commercial standpoint, the laser diode is typically purchased without an electronic stabilizer component. Nevertheless, laser stability is crucial for the production process of LIG/LIGO. The objective of our study is to examine the impact of laser current management on the production of graphene on a polyimide (PI) sheet utilizing a 450 nm diode laser. The laser controller we utilize is the National Instruments (NI) PXIe-1085 device. The optical power of the laser diode was measured between 0.21 and 0.79 W. After the laser current was stabilized, the power slightly shifted, ranging from 0.18 to 0.86 W. Both experiments were conducted with a current range of 0.3 to 1 A. Before regulation, the laser diode experiences current fluctuations in the range of around 0.01 to 0.03 A. The study findings highlight the significance of laser current management in manufacturing LIG/LIGO by ensuring a consistent and precise laser power output, hence minimizing flaws in the final product. However, the analysis reveals that graphene oxide is the predominant yield in this characterization. This fact is caused by the presence of a graphene layer not exposed to the surface during measurement. This approach provides several benefits, such as the capacity to produce graphene/GO in a targeted, non-chemical, and fast manner, as well as its potential for diverse applications.

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