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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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Classification of Diseases of Banana plant Fusarium Wilted Banana Leaf Using Support Vector Machine Yus Rama Denny; Endi Permata; Lusiani Dewi Assaat
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 1 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i1.15893

Abstract

Fusarium wilt is an important disease of various types of bananas and one of the most common diseases that causes destruction of banana plants in tropical and subtropical regions. Fusarium wilt caused by the fungus Fusarium oxysporum f.sp. cubense (FOC). As an inhabitant, invader, soil-transmitted fungus and causes wilt that colonizes xylem vessels, FOC requires penetration through the roots of the host plant, so that in its control it is necessary to try to provide protection and induction of host resistance systems in the root system. in this research.The proposed banana plant disease detection system consists of two phases, in the first phase, namely in the learning process, the images of healthy banana leaves and those affected by fusarium disease are files each measuring 640x480 pixels obtained from the results of taking a digital microscope on the plantation. PT. GGP Lampung. Next is the classification process. The method used for pattern recognition in this study is a support vector machine (SVM). Basically SVM can only be used to classify data into two classes (binary classification). To be able to apply to the problem of classifying healthy banana leaves and those affected by mild, moderate and severe fusarium disease consisting of more than two classes, a multiclass SVM classification method is applied which is built by combining several binary classifications. In the training classification process, the hyperplane variables for each classifier obtained will be stored and will later be used as data for each classifier in the testing process, in other words the training classification process is a process to find support vectors, alpha and bias from the training input data obtained. in the form of a feature vector from the image of healthy banana leaves and those with mild, moderate and severe fusarium disease (four classes). From the results of the classification stage experiment using the support vector machine one against all method, the results obtained are Class I (Healthy Banana Leaf) 90.833%, Class II (Light Fusarium Banana Leaf) 76.688%, Class III (Medium Fusarium Banana Leaf) 77.50, Class III (Medium Fusarium Banana Leaf) IV(Fusarium banana leaf weight) 95%.
The Implementation of Problem-Based Learning Models using Google Sites to Improve Students’ Problem Solving Skills on the Topic of Electrical Safety System Fathiah Damri Said; Yus Rama Denny; Asep Hidayat
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 1 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i1.17194

Abstract

This study aims to obtain an overview of the effectiveness of the application of problem-based learning models assisted by google sites to improve students' problem solving skills on direct current electricity topic, especially electrical safety system subtopic. Pre-experiment method with one group pretest-posttest design was conducted in this study. The research subjects consisted of 31 students of 12th grade science in the first semester of the 2022/2023 academic year at a public high school at Tangerang regency. The research instruments consisted of 2 structured questions for the problem solving ability test where each question contained indicators of targeted problem solving skills, namely: identifying problems, describing problems with physics quantities, plan the solutions, execute the solutions, and evaluating the resultsof problem solving. This study was conducted in three stages: 1) the preliminary study includes literature review, field study, developing google sites for learning purpose, preparing the lesson plans and the problem-solving worksheets, and developing the instrument tests; 2) the implementation stage includes the implementation of PBL in the classroom; 3) the final stage includes analyzing data and presenting the results of the study. According to the data, it can be concluded that the application of the PBL model in learning the topic of electrical safety systems can improve students' problem solving skills, indicated by the average N-gain score of students' problem solving skills of 0.91 with the category of improvement is high.
PENGEMBANGAN PERANGKAT PEMBELAJARAN FISIKA BERBASIS SiPanTer Syamsul Bahri; Muhammad Lintang Cahyo Buono
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.15200

Abstract

This study aims to develop a digital learning device for moodle-based physics subjects using the SiPanTer LMS, which is feasible to use. The type of research used is development research using a 4D model in product development which includes four stages, namely the define, design, development, and dissemination phases. The limited and broad trial subjects consisted of 3 and 17 teachers, prospective physics teachers from 10 high schools in district Merauke, and a physics education graduate from Musamus University who has not served at school. The research instrument used is an expert validation instrument to assess the feasibility of the product and a questionnaire instrument to see the teacher's response to the product developed. The data analysis technique used is descriptive data analysis. The results showed that the SiPanTer-based physics learning device was feasible to use
Development of Basic Physics Teaching Materials Based on Science, Technology, Engineering, and Mathematics (STEM) In Industrial Engineering Study to Improve Student's Life Skill Diana Ayu Rostikawati; Dedy Khaerudin; Asep Saefullah
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.17541

Abstract

The purpose of this study was to develop Basic Physics teaching materials based on STEM, measure the feasibility of Basic Physics teaching materials based on STEM from the aspect of validity and practicality and measure the effectiveness of Basic Physics teaching materials based on STEM in improving Life Skills through student responses. This study used ADDIE model, which consists of 5 (five) steps, e.g Analysis, Design, Development, Implementation, and Evaluation. Produced a teaching material based on Science, Technology, Engineering, And Mathematics (STEM) on Dynamic Electricity concept. The developed teaching materials consist of seven materials, e.g Electric Current, Electrical Measuring Instruments, Ohm's Law, Resistance of a Conductor, Circuit Resistance, Kirchoff's Law, and Dynamic Electrical Applications. Teaching materials are also equipped with practice questions, practical instructions, project worksheets and additional reading lists. The results of the validation show that the teaching materials are feasible and meet the requirements to be used in the learning process of Basic Physics. The results of the implementation of teaching materials indicate that teaching materials have an influence and can improve student life skills. The results of responses to the quality of teaching materials showed that most students gave positive responses to teaching materials and stated that Basic Physics teaching materials based on STEM for Dynamic Electricity concept had been understood and met student learning expectations.Keywords: Teaching Material, STEM, Life Skill
Aplikasi Zeolit-Y Berbahan Dasar Lempung Sidrap dan Abu Sekam Padi Sebagai Adsorpsi Logam Tembaga (Cu) dan Timbal (Pb) Armayani Armayani; Damis Damis; Hasrianti Hasrianti; Angga Nugraha; Subaer Subaer
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.13747

Abstract

This research examines zeolite-Y made from sidrap clay and rice husk ash as the adsorption of copper (Cu) and lead (Pb) metals. The method used is hydrothermal, using an autoclave with variations of Pb and Cu metals, namely 200, 400, and 600 ppm. The results showed that zeolite-Y was able to adsorb Cu and Pb well, as evidenced by the presence of Pb and Cu in the mapping results and EDS (Energy Dispersive X-Ray) and SEM (Scanning Electron Microscopy) showed the morphology of each sample of Cu and Pb metals. Pores indicate the absorption of Cu and Pb metals in the zeolite. The results of AAS (Atomic Absorption Spectrophotometer) show that the greater the levels of Cu and Pb produced, the greater the absorbent level.
Development of interactive learning assisted by x-mind to train high school students' conceptual understanding Elta Puja Candera; Rosane Medriati; Eko Risdianto
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.17733

Abstract

This study aims to develop a product in the form of an interactive concept map assisted by learning media, namely the X-mind application to train students' conceptual understanding. The method used is research and development (Rnd) which has 5 ADDIE stages there are Analysis, Design, Development Implementation and Evaluation which includes material expert tests and media expert tests. The results of the percentage that has been given by material validation experts is 96.05% and the results given by media validation experts are 96%, thus it can be concluded that interactive learning through concept maps assisted by the X-mind application is very feasible in learning physics material elasticity with an average result expert validation test of 96.02% is very feasible to develop. Then to strengthen this product development, data collection on student perceptions of the products that have been developed was carried out with the results of the presentation aspect 86.8%, understanding aspect 86.6%, interest aspect 85.2% and attention aspect 86.6% with an average percentage of 86.3% is very good to use.
Estimated acceptance of ovarian radiation absorbed dose in abdominal examination using the 10 kV rule method based on Caldose_X Software Dian Nuramdiani; Surdiyah Asri Ningrum
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.15734

Abstract

Radiation exposure to the ovaries due to abdominal radiology is unavoidable given its location in the lower abdomen. Ovaries are organs that have a high level of sensitivity to radiation. One of the efforts used in the application of radiation protection optimization is the use of the 10 kV rule method. This study aimed to determine the estimated reception of ovarian radiation dose on abdominal radiology examination. The examination was carried out by anteroposterior (AP) projection of the female body phantom (FAX06) using Caldose_X software. The beam variation is set from 60kV/32mAs to 100kV/2mAs. The results of the ovarian radiation dose examination were: 0.484mGy for 60kV/32mAs, 0.402mGy for 70kV/16mAs, 0.309mGy for 80kV/8mAs, 0.227mGy for 90kV/4mAs, and 0.154mGy for 100kV/2mAs. When compared with the radiation dose limit for the abdominal examination set by BAPETEN, the data for this study were much smaller. Likewise, when compared with the reference results of previous studies, the data on ovarian radiation dose reception in this study were still within safe limits.
Analysis of student’s creative thinking ability in computation physics course Rizka Melia Putri; Akmam Akmam; Fatni Mufit; Silvi Yulia Sari; Rahmat Hidayat
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.13783

Abstract

Creative thinking is a crucial thing to support the development of students taking Computational Physics courses but is rarely considered, so it takes a description of students' creative thinking skills so as to provide alternative appropriate learning methods. The purpose is to determine the ability of creative thinking of college students within the Computational Physics courses. This kind of study is descriptive with a quantitative method. The studies populace is all college students taking courses of Computational Physics for the January-June 2021 semester. The studies tool is within the form of a questionnaire. The research results: Students' Creative Thinking Ability in Computational Physics Course as a whole is 65%, based on the Problem Sensitivity indicator has a direct effect value of 0.91, the Fluency indicator is 0.94, the Flexibility indicator is 0.96, the Originality indicator is 0.64, the Elaboration indicator is 0.69, and the Evaluation indicator 0.58.
The impact of Anticipation Guides on students’ reading activities to improve conceptual understanding Yuvita Oktarisa
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.17910

Abstract

Conceptual understanding is significant aspect in Physics Education. Student’s understanding on particular content stands as the significant foundation to build holistic comprehension. The Program for International Student Assessment (PISA) coined students’ ability to understand scientific reading as part of scientific literacy. The role of reading activity in science is fundamental as the position of the experiment. It means reading not only facilitates students to master scientific information but also assists them in having problem-solving skills. This work promotes reading activities to structure students’ comprehension. Anticipation guides facilitates students for having empirical competencies, such as applying, analyzing, and evaluating. These competencies improve students’ conceptual understanding.
Student's professional competence development using the blended learning Sumihar Simangunsong
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.15932

Abstract

This research is motivated by the low level of competence of graduates from universities which results in low professionalism in the world of work in the current era of globalization. The purpose of this research is to show the relationship of increasing professional competence through blended learning model. The sample of this study was forty-five students majoring in Mining ISTP FY 2021/2022 who were made into two sample groups. The control group (CG) of 20 students was the group that was not treated with the blended learning model, while the experimental group (EG) of 25 students was treated with the blended learning model. This research was conducted using a quantitative descriptive method. To determine the level of professional competence of students, a test is used for each competency criterion. The results obtained at the level of competence in the cognitive control group 0%, andragogical competence 25% and social competence 35%, and in the experimental group cognitive 48%, andragogical competence 72% and social competence 64%. The results of this study concluded that the blended learning model can improve and develop the professional competence of graduate students so that they are competent in the world of work in the era of globalization.

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