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Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 2442515X     EISSN : 25281976     DOI : http://dx.doi.org/10.30870/gravity.vxix
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
The focuses of the manuscript received in the Gravity journal is limited to the topic: Physics Education (Media, Educational Policy, Assessment, Learning Model) Theoretical Physics Material Physics Earth and Environmental Physics Astrophysics Medical Physics Computational Physics and Instrumentation
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 208 Documents
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The effect of problem based learning STEM (PBL STEM) on students' systems thinking skills on global warming material Saputri, Syafah Anggriani; Suryadi, Ahmad
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.25683

Abstract

This study explores the effect of PBL-STEM on students' systems thinking skills in global warming topics. This research is a quantitative study with a quasi-experimental design. This study was conducted in one of the public high schools in South Tangerang. The participants involved were 72 students. In the experimental class, students learned with PBL-STEM, and the control group used conventional learning. The system thinking instrument was developed using 24 tested multiple-choice questions with a reliability of 0.83. The results showed that PBL-STEM significantly affected students' systems thinking skills (p < 0.05). The experimental class students' systems thinking was higher than the control class' systems thinking. Furthermore, systems thinking skills in the experimental class increased, but the highest value was at level 1 with the essential difficulty; in the control class levels 1 and 2, there was a more significant increase. This study can be continued for future research investigating the effect of PBL STEM on systems thinking skills in different contexts.
Quantum Physics Lecture Profile in Supporting Student Computation Thinking (CT) Integration Program Riskawati Riskawati; Dadi Rusdiana; Hendra B
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10 No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.23343

Abstract

The purpose of this study is to describe how the profile of lecture needs related to content in quantum physics at the UNTIRTA Physics Education Study Program. The methods used in this field study are: 1) paper, in the form of curriculum documents, national curriculum and RPS; 2) person, lecturer in quantum physics; 3) the place is located in the Department of Physics FMIPA UNTIRTA. Data collection techniques in field study activities are carried out using non-test instruments carried out through document analysis, questionnaires, interviews and tests.  The results of the analysis show that the curriculum of the Quantum Physics Study Program (compulsory) in semester V has not been well developed and is not specifically designed to consider students' deep conceptual understanding, the assessment system has not been able to appropriately follow the 21st century learning system, and learning has not been student-centered. Therefore, an analysis is needed based on the needs of a more in-depth study program to determine the topic of study materials in the Quantum Physics course if it is to be applied in the curriculum. 
Efektivitas Alat Peraga Medan Magnetik Digital Berbasis Arduino Uno untuk Meningkatkan Pemahaman Siswa SMA Sumiati, Sumiati; Ramadani, Santri; Fauzan, Alvin Syahrul; Rusdiana, Dadi
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.23887

Abstract

The study addresses the challenges often associated with the abstract nature and mathematical complexity of physics, particularly in relation to the concept of magnetic fields. To facilitate visual learning, the study aims to assess the efficacy of a teaching aid centered around a toroid, the researcher developed using Arduino Uno and Hall effect sensors. The research employs a quantitative one-group pretest-posttest design, measuring outcomes through test scores and student questionnaires. The N-Gain test indicates a moderate increase in student understanding concept. The results of the analysis of student responses through questionnaires had shown that students had found it easier to understand the magnetic field material when using Arduino-based magnetic field teaching aids, and the learning media used had made it easier for students to remember the magnetic field material. The findings support the effectiveness of the Arduino Uno-based digital magnetic field teaching aid in improving students' understanding of toroidal magnetic fields.
Structural characterization of SnS thin films prepared by vacuum evaporation technique Ganesha Antarnusa
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10 No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i1.27912

Abstract

Tin Sulfide (SnS) thin films were fabricated using vacuum evaporation techniques under a pressure of approximately 2×10⁻⁵ mbar. Cleaned microscope glass substrates were utilized, with a substrate temperature maintained at 300 K. The deposition of the SnS thin films was conducted by placing spacers between the substrate and the source at distances of 10 cm, 15 cm, and 25 cm. The study of SnS thin films included X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive analysis X-ray (EDX). The XRD patterns of the SnS thin films revealed good crystallization and confirmed the presence of an orthorhombic crystal structure with lattice parameters for sample 1 (10 cm spacer): a = 4.308 Å, b = 11.142 Å, c = 4.132 Å; sample 2 (15 cm spacer): a = 4.305 Å, b = 11.101 Å, c = 4.217 Å; and sample 3 (25 cm spacer): a = 4.081 Å, b = 11.135 Å, c = 4.292 Å. The preferred orientation was along the (0 4 0) planes for all films. Lattice parameters, grain size, and microstrain in the films were calculated from XRD patterns and correlated with the substrate spacer. Grain size distributions were derived from SEM micrographs, revealing a grain size of approximately 0.5 μm. EDX analysis indicated the chemical composition of the sample, with elements Sn = 37.86% and S = 13.58%.
Investigasi Potensi Penggunaan Nanofluida Water-CuO untuk Ekstraksi Energi pada Abandoned Geothermal Well Syaharussajali, Syaharussajali; Suyanto, Suyanto; Wahyuono, Ruri Agung
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.27892

Abstract

Indonesia has a geothermal potential of 24 Gigawatts (GW), making Indonesia the second largest country with geothermal potential. High investment costs are still a challenge in the development of geothermal energy, where the cost of drilling geothermal wells is the most expensive with a cost of more than 50% of the total project cost. One solution to this problem is retrofitting abandoned wells with a closed loop well system (double pipe heat exchanger). Reusing abandoned wells to extract heat energy only costs about a third of the cost of making a new geothermal well. However, the low heat transfer value of this system makes it rarely applied as a power plant. Therefore, the thesis research analyzes the effect of adding CuO nanoparticles in the base fluid (water) of a double pipe well as a solution to improve heat transfer performance. The effect of nanoparticles on closed loop wells is modeled using a CFD simulation approach. The results of the CFD simulation will be used as input in calculating the performance of the Organic Rankine Cycle system which is used to determine the potential for electricity generation. Based on the calculation results, it was obtained that CuO nanoparticles with a concentration of 4%wt had the greatest heat transfer among other nanoparticle variations and this was in line with the power output produced, which was 2045 kW.
Profile of Science Inquiry Literacy (SIL) achievements of pre-service physics teacher using rasch model measurements Dina Rahmi Darman; Andi Suhandi; Ida Kaniawati; Achmad Samsudin
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10 No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i1.22769

Abstract

Pre-service physics teachers must have Scientific Inquiry Literacy (SIL) to prepare to teach physics. This research aims to describe the SIL profile of Pre-service physics teachers using the Rasch model. The mixed method with Convergent Parallel Design was chosen for this research. The mean value of the knowledge aspect is 6.1 (the top score is 35). Person measures -1.96, person separation 0.45, and person reliability 0.17. This condition shows that the consistency of the answers is still low, and the ability is low. The mean value, person measure, and separation of the skill aspect are 10.8 (the top score is 39), -1.10, and 0.00. This condition shows low ability and low diversity. The mean value for the attitude aspect is 79.5 (the top score is 108). Person size, separation, and reliability are 1.33, 2.01, and 0.8. This condition indicates a high ease of agreement on items with a wide variety and a good consistency of answers. The interviews and lesson plan analysis results show that pre-service physics teachers have yet to become accustomed to applying scientific inquiry in learning. Thus, the SIL in the knowledge and skills aspects of and the ability to design inquiry teaching still needs to be improved.
Comparison of Microstructures and Magnetic Characteristics of CoFe2O4/PEG and MnFe2O4/PEG for Drug Delivery System Application Joko Utomo; Hafiz Sub’han
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10 No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i1.28748

Abstract

CoFe2O4/PEG and MnFe2O4/PEG materials have been successfully prepared using the coprecipitation method with a synthesis temperature of 90 °C. Doxorubicin (DOX) was successfully loaded and released in both samples. Based on the XRD results, the crystal structure of CoFe2O4/PEG is cubic spinel while the structure of MnFe2O4/PEG is hematite with the lattice parameters for CoFe2O4/PEG and MnFe2O4/PEG is 8.40 nm and 8.41 nm, respectively. Based on the SEM results, the morphology of the two samples is quite homogenous and the particle size of CoFe2O4/PEG is smaller than MnFe2O4/PEG’s. There is a vibrational spectrum of Fe – O  in both samples at wave numbers of 600 - 690 cm-1. Based on VSM characterization, CoFe2O4/PEG is included in hard magnetic materials with a saturation magnetization of 54.85 emu/g and coercivity of 788 Oe. Meanwhile, MnFe2O4/PEG is classified as soft magnetic materials with lower saturation magnetization of 11 emu/g and coercivity of 7.42. In addition, based on the UV-Vis characterization obtained the efficiency of drug loading of CoFe2O4/PEG is higher (98.8 %) than the MnFe2O4/PEG sample (96.3 %). It is the opposite for the drug release percentage that CoFe2O4/PEG has 30.6 % which is lower than the MnFe2O4/PEG (51.6 %).
Pengembangan Program Pembelajaran Internet of Things Control Solution (IoT Consol) pada Mata Kuliah Media Pembelajaran Fisika Nurlia, Siti Rosyadah; Guntara, Yudi; Saefullah, Asep
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.25393

Abstract

This research focuses on developing an Internet of Things control solution (IoT consol) learning program in physics learning media courses. This study uses the Research and Development (R&D) method with the Thiagarajan 4D development model consisting of four stages: Define, Design, Develop, and Disseminate. The learning program products include semester learning plans, student worksheets, learning modules, and assessment sheets. Data collection techniques include product feasibility test sheets and student response questionnaire sheets. The feasibility test data for the learning program is analysed descriptively based on the feasibility test criteria for product development, referring to the Likert scale 1-7. The results of the product development research obtained a feasibility value with overall feasibility criteria for learning device elements with a value of 93% in the very good category, and the results of student responses obtained a value of 77.77% in the good category. The developed IoT consol learning program was feasible for physics learning media courses based on data analysis.
Study of regional topography and rainfall distribution using the Inverse Distance Weighted (IDW) interpolation method in Serang City Al Kansaa, Hanifah Nuraini; Ruhiat, Yayat; Saefullah, Asep
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i2.28155

Abstract

Indonesia has a reasonably large area with a high level of weather and climate diversity, causing various parts of the region to experience rain with different characteristics, one of which is influenced by the topography of the area so that it is not possible to use just one rain gauge to describe the rain in a region. Therefore, it requires the average rainfall from several nearby rain measurement stations or posts. This research aims to describe the influence of regional topography on the distribution of rainfall in Serang City using the Inverse Distance Weighted (IDW) interpolation method by varying the power value and processing and analyzing using the Geographic Information System (GIS). The research method used is non-experimental quantitative with spatial reclassification analysis. The data used is secondary data collected from previously existing data. The results of the research show that in areas that are at low altitudes and have gentle slopes, the average rainfall will be low, namely 1414.91 mm/year, and vice versa; if areas are at high altitudes and have steep slopes, the average rainfall is The rainfall will be high namely 1644.6 mm/year.
DIY photometer in determining the beginning of dawn time in Cimahi City Cahyo Puji Asmoro; Hana Susanti; Judhistira Aria Utama; Dhani Herdiwijaya
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 10 No 1 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v10i1.22873

Abstract

The use of SQM as a calibrated portable photometer is currently a hot topic in astronomical research in terms of measuring the brightness of the night sky; DIY Sky Quality Meter (SQM) with the name Photometer D.I.Y – CJ'01 has been successfully made and tested on a limited basis, the output data obtained by the photometer This is the magnitude value per square arc second (mag/sq arc second ~ mpsas). This research aims to determine the performance of the D.I.Y - CJ'01 Photometer in measuring the night sky's brightness to determine the start of dawn. The research method used was an experiment with data collection from the D.I.Y Photometer – CJ'01 and SQM Unihedron in Cimahi City during the New Moon and Full Moon. The results of data processing using the solver method show that the D.I.Y - CJ'01 Photometer has almost the same performance as the SQM Unihedron based on the inflection point value that determines the start of dawn and also indicates the existence of pseudo-night in the city of Cimahi which is by typical urban areas dominated by light pollution and air pollution

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