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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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Kuis Kahoot Media Interaktif dalam Mengetahui Peningkatan Pemahaman Materi Metode Numerik Fisika Oseanografi Berbasis Pemograman Mathlab Muhammad Fikry Syach
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9673

Abstract

This study aims to improve the practical understanding of the numerical method of oceanographic physics based on Mathlab software to calculate the roots of the Airy wave equation through the Kahoot application as an interactive media. This study used a population of 3 classes totaling 105 people. The determination of the increase in quiz scores with and without the Kahoot application was analyzed using the basic statistical comparison method, Independent T-Test Comparison (Intecomp) testing, as well as analysis of the distribution of the increase in quiz scores per class and per, mean predicate with a weighted scale of 4. The average score of the quiz scores without Kahoot 76.28; with Kahoot 84.96; the Intecomp P-Value test results 6,1.10-6 (α = 0.05), a significant increase in quiz scores from the use of the Kahoot application. The distribution of data for the increase in weighted quiz scores is 9.63%; As for the distribution of the rise in the average quiz score per class was 5.42%. Based on the statistical analysis test, it can be concluded that the use of the Kahoot application as an interactive media can increase the practitioner's understanding of the mathematical physics numerical method of oceanography based on Matlab.
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. 
Implementation of problem based learning with cmaptools media to increase problem solving abilities Desy Eka Muliani
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9136

Abstract

This study aims to analyze the comparison of increasing the problem solving ability between groups of students who get problem-based learning with cmaptools media, and groups of students who get conventional learning. The research method used was a quasi experiment with the Randomized Control Group Pretest-Posttest design and descriptive method. The instruments used include: problem solving ability test. The improvement of problem solving ability is determined through the average N-gain. The results of the calculation of the average N-gain obtained that the average N-gain group of students who get problem-based learning with cmaptools is 0.78 (high category), while the average N-gain group of students who get conventional learning is 0.68 (medium category). The results of statistical tests (t-test) show that problem-based learning with cmaptools can further improve problem-solving abilities compared to conventional learning.
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.
Pengaruh ekstrak jintan hitam (Nigella sativa) terhadap kadar SGPT hepar tikus (Rattus norvegicus) yang diinduksi Piroxicam Septiana Kurniasari; Moch. Haikal
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.10180

Abstract

Piroxicam is a non-steroidal anti-inflammatory drug (NSAID) that can cause side effects on the liver. If the liver is affected by side effects from using Piroxicam, it can cause cell damage so that the hepatic organs' function and work are disturbed. The biomarker of liver damage is the SGPT level. An increase in the SGPT ratio indicates serious liver damage. One way to minimize liver damage is by giving antioxidants. One of the many herbal plants used to prevent or treat various diseases is black cumin (Nigella sativa). This study aimed to analyze the effect of black cumin extract on the liver SGPT levels of Piroxicam-induced rats. Eighty male mice were used in this study and were divided into three groups, namely the negative control group (K-), Piroxicam non-extract (P-), and Piroxicam plus extract (P +). Black cumin extract is given orally at a dose of 2 gr / kgBW; 3 gr / kgBB; 4 gr / kgBB; 5 gr / kg body weight and 6 g / kg body weight, while the Piroxicam dosage given is 1 g / kg and 3 g / kg body weight. The results showed that the more Piroxicam doses were given, the higher the SGPT level. Along with the increase in the dose of black cumin extract, the SGPT level is reduced.
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.
Analisi Pengaruh Kebisingan terhadap Kinerja Pandai Besi dengan Regresi Linier Amalia Ma'rifatul Maghfiroh; Zainudin Zainudin; Alfian Bima Chandra; Arum Sulistyorini
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9453

Abstract

Noise in itself can be harmful or dangerous to health. The research objectives were to determine the noise value generated by blacksmiths and analyze the effect of noise levels on blacksmith performance. The research was conducted by direct observation and giving questionnaires to respondents. Data processing using the t-test to determine the level of noise and its effect on blacksmiths. This study's conclusion is the level of significant difference with the Threshold Value (NAV) set by the government, which is 99.328 dB (A). Meanwhile, the government's NAV for the work area (industry) is 85 dB (A). The simple linear regression analysis results indicate that noise in the blacksmith's work area has no significant effect on employee performance. This is shown from the test results of simple linear regression analysis through the t-test, obtained t count of -0.365 smaller than t table of 2.069 or the number sig. equal to 0.719, which is greater than α of 0.05.
The utilization of microalgae as an agent for converting CO2 to O2 in a photosynthesis reactor to mitigate CO2 emissions Mahendra Satria Hadiningrat; Eggi Aunur Rofiq
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9210

Abstract

A closed photobioreactor design has been fabricated, aiming to determine the basic concept for microalgae Chlorella Vulgaris development. This study employed a flat-plate type with dimensions of 16x20x25 cm with the effectiveness of 3000 ml culture media and two 20 Watt 220 Volt Tungsten Halogen lamps, which were placed on the right and left sides of the reactor with a light intensity of 1000 lux. This study employed two photobioreactors, type I without CO2 supply and type II with CO2 supply as much as 25%. The initial cell density of Chlorella Vulgaris culture was 14,694 x105 cells/ml; then observations were made every day using a Haemocytometer. O2 concentration data were collected every day 3 times with irradiation time of 1, 6, and 9 hours using the O2 gas sensor (KE-50 type). The determination of the O2 concentration value in the photobioreactor on the 3rd day was 0.69%
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. 

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