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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 10 Documents
 1 
Search results for , issue "Vol 6, No 2 (2020)" : 10 Documents clear
Introduction to the development of integrated science teaching materials based on inquiry labs to improve students' science literacy Yusmanila Yusmanila; Zaturrahmi Zaturrahmi
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8803

Abstract

The purpose of this study was to describe the science learning process and the teaching materials used by teachers in science learning. The type of research to be conducted is descriptive quantitative research. Respondents in this study were 26 students of class VIIIA MtsN 6 Sijunjung. The research instrument was in the form of a questionnaire filled out by students and an interview sheet with the educator. The result of the research is that the science learning process is more predominantly carried out through the lecture method compared to the experimental / practicum / inquiry labs method by 83% and the teaching materials most often used by teachers in science learning are textbooks by 85%. Science learning has not facilitated students to have scientific literacy because science learning is more often carried out by the lecture method. Thus, teachers need to develop appropriate teaching materials in order to increase students' motivation and scientific literacy. 
Development of “trainer kit kapasitor” (TRAKTOR) as physics learning media based on science process skills (SPS) Resty Dwi Asry; Andri Suherman; Asep Saefullah
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8383

Abstract

This study aimed to discover how the media feasibility and response of a limited trial of Trainer Kit Kapasitor (TRAKTOR)/ Capacitor trainer kit based on Science Process Skills (SPS) as a physics learning media. The method used was research and development (R&D) with the 4-D model. As a physics learning media, TRAKTOR was designed to facilitate some experiment activities, including a experiment in capacitance parallel plate capacitor, circuits of capacitors (series, parallel, series-parallel) charging-emptying capacitor. The results showed that the media is feasible to use, namely, 93.74%, which was categorized as very feasible, and the media obtained students' responses with an excellent category of 85.2%. Based on the result, TRAKTOR can facilitate students' SPS and media suitable for use as a physics learning media. 
Development of distance glove for blind people as an alternative tool Nugroho Prasetya Adi; Rahayu Agustin
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8558

Abstract

The eye was one of the senses that functions to record a state or condition so that humans could know the object they see. However, not all humans were created with normal eye conditions; some had visual disturbances from birth. Blind people generally use a walking aid in the form of a cane or a trained dog to help with movement and increase safety and independence during activities. This research aimed to produce gloves as a tool for blind people who had a distance accuracy from the ultrasonic sensor. This research was a research development (R&D). The results showed that the average error percentage was 1.75% for the ultrasonic sensor one and the average error percentage was 2.13% for the ultrasonic sensor 2. So it can be concluded that the research data obtained has a research accuracy of 98.25% for the ultrasonic sensor 1 and 97.87% for the sensor. Ultrasonic 2. The maximum distance that the two ultrasonic sensors can read is 55 cm; at that distance, the two ultrasonic sensors will work properly. For distances above the maximum distance, the ultrasonic sensor cannot do. 
Pengaruh Paparan Radiasi Gamma dan Pemberian Ekstrak Temulawak (Curcuma xanthorrhiza) terhadap Jenis dan Luas Kurva Radikal Bebas pada Paru-paru Mencit (Mus musculus) Septiana Kurniasari; Rara Ayu Shabrina
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8114

Abstract

The interaction of radiation with cells will form free radicals. Free radicals can cause cell damage. The presence of free radicals contained in cells could be detected using Electron Spin Resonance. Antioxidant compounds could minimize free radicals. This study analyzed curcumin extract and gamma radiation exposure on the area of free radical curves in the lungs of mice. Eighty male mice were used in this study and were divisible into three groups, namely the negative control group, the non-extract radiation group, and the extract plus radiation group. Curcumin extract was given at a dose of 1,4 gr/kgBB; 2,0 gr/kgBB; 2,6 gr/kgBB; 3,2 gr/kgBB and 3,8 gr/kgBB. The mice were exposed to gamma radiation for 10, 20, 30, 40, and 50 minutes. The results showed that curcumin extract, which was given as prevention from gamma radiation, reduced the area of the free radical curve from 0,630 cm2 to 0,004 cm2.
Perhitungan keruncingan pada citra paru-paru penderita efusi pleura dan citra paru-paru normal dengan metode segmentasi thresholding Indah Nurhidayati; Sinta M Siagian
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8384

Abstract

Research on the calculation of tapering from lung's images of patients with pleural effusion and normal lungs has been carrying out using the thresholding segmentation method. The tapering calculation was done using the Matlab programming language by applying the thresholding segmentation method's image processing theory. Images sharpness was obtaining from calculating the longest distance from all distances that were searching in the program. The steps taken in this research were image quality improvement, determination of the region of interest (ROI), thresholding segmentation, and calculating the tilt. Taper count was performing on eight lung images identified pleural effusion and eight lung images identified as normal. In 8 images of lungs pleural effusions, each taper was obtained 166; 159; 167; 167; 150; 157; 114; and 149. Whereas in 8 images of normal lungs, it was obtained that the respective curls were 187; 174; 181; 198; 199; 195; 179; and 195. The analysis showed that the lung's images of pleural effusion patients had a tapering of less than 171. In contrast, normal lung images had a tapering of more than 171, so that one characteristic was obtained that could distinguish between normal lungs and pleural effusions. It can facilitate medical personnel in the early detection of pleural effusion patients so that they can be handled quickly and accurately.
Pengembangan dan validasi bahan ajar multimedia interaktif materi hukum kirchhoff menggunakan adobe flash cs6 Kharen Riz Lambar Wati; I Wayan Distrik; I Dewa Putu Nyeneng; Abdurrahman Abdurrahman
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8176

Abstract

Graduates' standards of competency and content in the national curriculum explain the principle of learning should be done anywhere. Technology was using to improve the effectiveness and efficiency of learning. The education world still needs teaching materials that support the learning process. The purpose of this research was to produce a viable interactive multimedia product. The multimedia eligibility criteria were reviewed from the content and construct validation test, practicality test, and effectiveness test. This research was development research carried out in four main stages, namely preliminary studies, planning and development, field testing, and dissemination. The multimedia component consists of core competencies, essential competencies, text, sound, images, animation, material explaining in detail, and practice questions that could be adjusted to students' needs. The results showed that interactive multimedia teaching materials were valid in terms of content and constructed. They practically used as well as a solution to the impracticality of learning principles, as well as effectively increasing students' cognitive abilities. 
Item analysis: basic concepts of physics students in geometric optics Godelfridus Hadung Lamanepa; Rosenti Pasaribu; Claudia M.M. Maing
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8506

Abstract

The purpose of this study was to analyze students' items and abilities—the analysis for mapping test instruments and students' basic concepts regarding optics subjects before lectures are held. The test participants were 35 physics students. The analysis model of item response theory is a one-parameter logistic model or Rasch Model with the scope of analysis of the level of item difficulty, student ability, and statements that fit the item response model. Analysis of item responses and student responses carried out using Winstep version 3.73 software. The results of the qualitative analysis of the test items consisted of memory (C1) analysis (C4). The quantitative analysis using the Rasch model showed that 35% of the total items were difficult category items. For the suitability of test items in the instrument by 85% of items fit or generally function in measurement, more than 57% of students have the geometric optical ability in logit values of 0 to 1. The results of item analysis and student ability become information for teachers to design courses such as method selection, project implementation strategies, and assessments are undertaken. 
The effect of strengthening the prerequisite knowledge on student learning outcomes on the topic of values ​​and eigenvectors N. Siregar; Irma Novalinda
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8078

Abstract

The purpose of this study to determine the effect of strengthening prerequisite knowledge on students' achievement via and seeing students' perspectives on improving prerequisite knowledge. The research method was the Pre-Experiment, and the research sample was students of physics education on the 3rd semester in UGN Padangsidimpuan, totaling ten people. The instrument for collecting students' achievement is an essay test given to the pretest and posttest, and the device for managing students' perspectives on strengthening prerequisite knowledge is a questionnaire. Data analysis techniques for achievement were used non-parametric statistical tests with the Wilcoxon test and N-Gain, while the students' perspectives were analyzing through descriptive qualitative. This study's results indicate that there is a significant effect of strengthening the prerequisite knowledge on students' achievement, with a significance value of the Wilcoxon test count of 0.005. N-Gain obtained 0.74 in the high category. The results of the questionnaire distribution showed a positive perspective on strengthening prerequisite knowledge compared to previous learning. This medium indicates that there is an effect of enhancing prerequisite knowledge on students' achievement, an increase in achievement, and positive student perspectives on strengthening prerequisite knowledge. 
Analysis of the use of learning models in physics subjects at SMAN 9 Kota Tangerang Selatan Banten Indri Sari Utami; Ruth Soukaning Nugrah Djati; Yus Rama Denny; Yuvita Oktarisa
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8604

Abstract

The learning model is a frame in a learning process that can support the achievement of learning objectives. This study aims to determine, 1) the learning model used in physics subjects in schools, 2) the obstacles faced by the teacher in applying the learning model, and 3) efforts to overcome the obstacles in applying the learning model to achieve learning objectives. This research method is qualitative research. The survey was conducted on one physics teacher and three students determined by random sampling—observation data collection using interviews and documentation systems. While the data analysis technique used is descriptive qualitative analysis technique. From the research results obtained that: 1) the learning model carried out in the learning process at SMAN 9 Kota Tangerang Selatan Banten is CL (Cooperative Learning) and CTL (Contextual Teaching and Learning), 2) the constraints faced by the teacher when implementing the learning model are the ability students who are lacking in understanding the concepts of physics so that the difficulty in solving problems and challenges in choosing the equations used, 3) efforts to overcome the obstacles in using learning models are needed to develop appropriate learning models such as STEM-based CTL models that make students construct their knowledge. 
Analisis Laju Korosi Pada Logam Melalui Proses Dipcoating Larutan Elektrolit Miranda Miranda; Rahmawati Rahmawati
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.6830

Abstract

This study aims to determine how to test the rate of metal corrosion using dip-coating electrolyte solutions. The electrolyte solutions used are vinegar, lime juice, saltwater, and rainwater—this research conducted by the method of losing weight by dipping the electrolyte solution. The sample immersed for 27 days. The calculation results obtained and samples without coating have a high corrosion rate, so they destroyed quickly. The higher the value of the corrosion rate, the more easily destroyed it will be, and the sample will easily weather/damaged. Likewise, on the contrary, the lower the corrosion rate, the less corrosion that occurs, and the better the sample is protected from rust. 

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