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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 12 Documents
 1   2 
Search results for , issue "Vol 7, No 2 (2021)" : 12 Documents clear
Students’ Understanding in Airborne Transmission of SARS-CoV-2 by Dynamic Fluid Perspective using Structure of Observed Learning Outcomes (SOLO) Taxonomy Bagus Helmeyanto; Eko Hariyono
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.11574

Abstract

Online learning imposed by government as an impact of the COVID-19 pandemic affected students’ ability to understand the authentic problem. Authentic problem used to train students’ ability to apply their knowledge in physics. This research mainly discusses about the students' levels understanding of the authentic problem that is SARS-CoV-2 airborne transmission using the SOLO taxonomy. This research used a descriptive qualitative approach using eight questions related to SARS-CoV-2 airborne transmission. Data collected via online survey platform and analyzed by calculating the percentage of student's level of understanding for each given question. The result shown that 59% student included in pre-structural level, 19% included in uni-structural level, 10% included in multi-structural level, 3% included in relational level, and 10% included in extended-abstract level. 
Determine of the nira water viscosity by using video based laboratory falling ball method with tracker software Rianita Bela Islami; Lalu A. Didik; Bahtiar Bahtiar
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.10165

Abstract

This study aims to determine the viscosity of nira water using a falling ball method based on a video based laboratory with tracker software. This type of research is experimental research with a quantitative approach. The viscosity of nira water is measured by varying the temperature, concentration and duration of fermentation. The temperature varied, namely 160C, 270C and 820C. The concentrations were varied by comparing the viscosity coefficient value of pure nira water, nira water added with coconut water and mineral water. And for the fermentation time of the nira water was varied for 7 days, 9 days and 11 days of fermentation. The nira water with varying temperature, concentration and fermentation time has different coefficient values for the nira water. The nira water given the highest temperature has the lowest viscosity coefficient value. And the nira water with the highest concentration has the highest viscosity coefficient value as well. And the longest fermented juice showed the lowest value of the viscosity coefficient of nira water. And from the results of my interviews with nira water farmers in the village regarding the good viscosity coefficient value of nira water, it can be taken from the value of viscosity coefficient of pure nira water, as researchers also examined in this research. Because researchers saw to harvest nira water directly from the tree for research on pure nira water. 
The comic isomorphic physics series of vibrations and waves to increase the learning interest of junior high school students Desy Kumala Sari; Vinsensia Melania Wea; Mitra Rahayu; Pri Ariadi Cahya Dinata
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.11370

Abstract

Independent learning needs to be supported by independent learning media so that student's interest in learning is increasing.Low interest in physics at junior high school level causes students to be indolent to learn.Therefore, supporting learning media are needed that can foster students' interest in learning physics. This research focuses on developing a product in the form of an isomorphic physics comic for the Vibration and Waves series which is an independent learning media. This study uses the DDDE development model, namely the stages of decide, design, develop, and evaluate. Following the development stage used in this study, it carried out a feasibility and effectiveness test. The results of the feasibility test analysis using SBi (ideal standard deviation) obtained an average score of 85 which was interpreted into the product quality criteria in the "Very Good" category. Furthermore, the effectiveness test was carried out by testing on a small scale, and then the results were analyzed using simple statistics to obtain the results that 91.7% of students expressed "interest" in learning to use "isomorphic physics" comics. Thus, the use of " the isomorphic physics" comic series Vibration and Waves in physics learning at the junior high school level can increase students' interest in learning.
Development of formaldehyde detector in salted-fish using color sensor Endi Permata; Yus Rama Denny; Irvan Akram
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.12686

Abstract

Currently, almost all traders use dangerous preservatives in salted fish, one of which is formaldehyde. Traders use these chemicals to make food more durable, even though the food will be consumed by humans. This is due to a lack of knowledge about foods that contain dangerous chemicals. Therefore, the Arduino Uno R3-based tool was developed. This Arduino Uno R3-microcontroller tool can test food practically and effectively quantitatively because it does not take long to see results. The TCS3200 was color sensor is used to detect food samples containing formaldehyde after being mixed with Formaldehyde Main Reagent according to the dosage. The sensor detects the changing color after everything has reacted, and a buzzer alarm will sound when the salted fish has formaldehyde. The test results are displayed on the 16x2 LCD screen and the NetBeans java application, where the output is a detection of whether salted fish has formalin or is formalin free. The initial data collection used a literature study and observation. This study used quantitative analysis and qualitative analysis. Based on the results, the performance test data of Formaldehyde Detector Prototype in Salted Fish Using Arduino Microcontroller-Based TCS3200 Color Sensor obtained a score of 74 or in the "Very Feasible" category. 
Portable urine alcohol detector fabrication with arduino microcontroller-based MQ-3 sensor Henry Prasetyo; Fitri Nur Indah Sari; Rinda Nur Hidayati; Raditya Linggar Apriyanto
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.11376

Abstract

An alcohol detector in urine is a tool that can detect alcohol in a person's urine. This tool detects Ethanol gas using the MQ-3 sensor. The MQ-3 sensor is an analog sensor that has a 5 volt DC power supply specification. Arduino Uno as a data processor obtained from reading the MQ-3 sensor and displayed on the LCD. This tool detects alcohol in a person's urine until it is known whether liquor is in the urine or not. From the design of this urine alcohol detector, the test results show an increase in the ADC sensor value when the sensor detects alcohol. It is known that it takes a different time for the sensor to return to the initial value of various alcohol concentrations. This study concluded that the sensor worked well until the alcohol concentration was 0.1%. The sensor also needed time to return to the starting point, directly proportional to the alcohol concentration examined. 
Monte Carlo Simulation on TiO2 : Water Thickness Determination and Electron Scattering Study on Wet Material Rahmat Firman Septiyanto; Isriyanti Affifah
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.11592

Abstract

Analysis of the three-dimensional (3D) structure of a material is indispensable in various fields of science, especially in materials science. Several studies have been conducted to observe the 3D structure of wet samples in a water-soluble environment using ESEM (Environmental Scanning Electron Microscopy) with tomography. The principle of tomography is based on the acquisition of a series of image projections at different angles of inclination and the calculation of the volume of the 3D reconstruction with a special algorithm. In this study, Monte Carlo simulation was used to analyze the optimum water thickness that could be detected in TiO2 wet material and the number of electron scattering captured to calculate the interaction volume dimensions. The results showed that the optimum thickness was achieved at 400 nm for the thickness of the wet sample and 10 nm for the thickness of the water. 
Portfolio elektronik sebagai asesmen pembelajaran fisika Sabana Asmi; Wiyanto Wiyanto; Ian Yulianti
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.10228

Abstract

One of the technologies available to support the assessment process is the e-portfolio. Much research has been done for e-portfolio assessment, and the result can easily find the result in journals. Even though systematic study about e-portfolio as physics learning assessment still rarely done. This research aims to identify the role of e-portfolio as a physics learning assessment in school. A literature study is carried out using four procedures based on PRISMA that are (1) identification, (2) screening, (3) eligibility, and (4) included. Article search has been done through the DOAJ, ERIC, IOP Science, Science Direct, and Springer Link. Based on analysis results, the use of e-portfolio encourages the creation of self-regulation learning. Furthermore, self-regulation learning can help develop a metacognitive skill that students much need for learning physics. Even so, based on 220 articles identified, research about e-portfolio as physics learning assessment has not been found. Therefore, further research is needed to develop and implement an e-portfolio as a physics learning assessment. 
Implementation of the use of textbooks with the context of socio scientific issues on climate change materials and its impact on life to improve students' scientific literacy Asep Saefullah; Yudi Guntara; Diana Ayu Rostikawati
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.12734

Abstract

The purpose of this study was to determine the effect of implementing the use of teaching materials in the context of Socio-Scientific Issues (SSI) on students' scientific literacy on climate change material and its impact on life. The research method used is a weak experiment with a one-group pretest-posttest design. The number of samples used is 60 students who are contracting Earth and Space Sciences (IPBA) courses. The research instrument used is a multiple-choice scientific literacy test instrument. The results showed that the use of teaching materials with the SSI context affected students' scientific literacy. This can be seen from the effects of statistical tests, which showed the arithmetic significance value (0.002) < 0.05. The use of teaching materials in the SSI context can also improve students' scientific literacy, which can be seen in the n-gain value of 0.54, which is in the medium category. 
Pengembangan m-LKPD berbasis proyek berbantuan smart apps creator 3 untuk menstimulus keterampilan proses sains Kurniawan Saputra; Kartini Herlina; Feriansyah Sesunan
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.11548

Abstract

This research intends to develop m-LKPD (mobile lembar kerja peserta didik) based on a project assisted by smart apps creator 3 in the diffraction of light lesson validly and practically. m-LKPD develops to stimulate scientific processes skill as multimedia to support online learning in this Covid-19 pandemic. This research uses Design and Development Research (DDR), consisting of 4 stages: analysis, design, development, and evaluation. The instruments used in this research are interview guidelines, validation test questionnaire, practicality test questionnaire, teacher perception questionnaire, student response questionnaire, and assessment rubrics of scientific processes skill. The result of the validation test results 3,62, with a very valid category. The outcome of the practicality test is 90% as a percentage average, with a very practical as a category. The result of stimulating scientific processes skills through a small team test gets 88% as an average percentage with stimulated as a category. This shows that m-LKPD develops very valid and efficient ways to stimulate processes skills. Besides, m-LKPD creates the potential to be implemented in online learning and face-to-face learning, proven by students’ responses gaining 94% with very good as a category and teachers’ perceptions that achieve 96% average percentage with very good as a category. Therefore, the developed m-LKPD can be used as multimedia to support online learning in this Covid-19 pandemic. 
Analysis of model fit and item parameter of work and energy test using item response theory Yustiandi Yustiandi; Duden Saepuzaman
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.10563

Abstract

One of the important parts in assessing learning outcomes is using a good instrument that is analyzed using an appropriate analytical model and can measure students' abilities accurately. This study aims to determine the model fit and item parameter of work and energy test using item response theory. This research is a quantitative research that was carried out on the responses of 1177 high school students spread across Banten Province. The instrument is a set of work and energy tests consisting of 25 multiple choices. The data analysis used the item response theory approach with statistical methods ranging from determining the fit model to the item characteristics.. The analysis showed the students' responses to the fit energy and effort test with 9 items of 1 PL model, 17 items of 2 PL model, and 16 items of 3 PL model. Based on the percentage, the 2PL model is suitable than 1PL and 3PL. Further analysis determines the item parameter value by referring to the 2PL model, namely the item parameter difficulty level (b) and discrimination (a). The result shows that all items have difficulty in the range of 2.501 to 1.595, and the discrimination was in the range of 0.289 to 1.109. Based on this analysis, it can be concluded that all items in this test are the good item criteria 

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