JIPF (Jurnal Ilmu Pendidikan Fisika)
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Treatment Of Acid Mine Drainage Using Fly Ash, Bottom Ash, And Lime Mixed
Full text linkCoal mining will form acid mine drainage in former open pit mines. If acid mine water enters community waters, it will cause disturbance to biota and decrease water quality. Sawahlunto is one of the cities in Indonesia that has a coal mining area located near a settlement. With the acid mine drainage, if it rains, the water will flow into the river where the water is used by the community. Part of the coal is used as fuel for the Sijantang Sawahlunto PLTU. The fuel also produces waste in the form of combustion ash known as fly ash and bottom ash (FABA). This study uses FABA to neutralize acid mine water to meet the community's irrigation water needs. This research will determine the appropriate mass of FABA in neutralizing acid mine drainage. Acid mine water comes from the former mining pit of PT. High Guguak Coal with a pH of 2.88. Then the acid sample is brought to the laboratory to be mixed with FABA and lime. 4.98 grams of FABA with 0.02 lime can neutralize 200 mL of acid mine drainage and change the pH from 2.88 to 7.91. FABA can be included in the settling pond to neutralize acidic water before it is released into community waters
The Analysis of Students’ Understanding of Electricity Fundamental Concepts
Full text linkThe aim of this research was to analyze students’ understanding of electricity fundamental concepts. The research of subjects are 86 students in physics department of UNG who are taking lectures of Fundamental Physics I in 2021/2022 academic year. Data analysis was conducted based on combination of multiple-choice test results Certainty of Response Index scores. The results show the students' understanding of electricity fundamental concepts which includes sub topics: conduction and induction, relation of electrostatic force and distance, electrostatic force resultant, electric field and electric potential, relation of voltage and electric current in conductor, series and parallel circuit, and placement of ammeter and voltmeter in electrical circuits, are still weak by most students, even many students who choose the false answer but are very sure of the answer. The research recommended further research to examine more intensely and more factually about the causes of student failure in solving fundamental problems of electricity, for example using Predict-Observe-Explain model or structured clinical interviews
The iSpring Ebook Learning Media for Online Learning Physics: In Case for Improving Student Conceptual Understanding
Full text linkThis study is aimed to determine the effect of learning media, an iSpring e-book, on online learning physics. There are 61 science students of Noemuti State High School participated in this study. The research was used the R&D method with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). In the implementation stages, two classes were used in the design quasi-experimental method. Students in the model class are not used iSpring e-book media, while a student in the implementation class used iSpring e-book media. The data in this study were judgments of the feasibility analysis of e-book media using the reproducibility coefficient (Cr). Analysis of differences in concept understanding and interest using N-Gain and effect size d'Cohen. As for the analysis of success indicators using SPSS version 25.0. The results of the validity of the e-book media instrument are feasible with Cr > 0.90. The result of paired sample t-test for both model and implementation classes is the value of t table > t count so that the hypothesis is accepted (Ha) there is a difference between the pretest-posttest values. The results of the analysis of the concept understanding indicators for the implementation class show the interpreting dimension of 91.30 and exemplifying 82.61 with a very good category, while the dimension model class interprets 47.36 with a sufficient category and gives an example of 60.53 good. The results of the analysis of learning interest in the implementation class for the dimensions of feeling happy are 3.56 (high) and involvement 3.69 (very high), while the model class for interest in learning for the dimensions of feeling happy is 3.21 (enough) and involvement is 3.07 (enough). Even though the facilities are constrained, Noemuti High School students are still enthusiastic about taking physics lessons online
Creative Thinking Physics: A Review and Bibliometric Analysis
Full text linkCreative thinking is one of the tallents required for the Industrial Revolution 4.0. The goal of this research is to conduct a comprehensive evaluation of the bibliometric literature on physics students' creative thinking abilities. Scopus data base articles discovered using publish software or perish (pop). This research analyzes 70 of 102 publications discovered in the Scopus database between 1960 to 2020. Mendeley's Reference Manager software is then used to handle the selected reference. After maintaining the database, this study uses Vosviewer software to classify and visualize it. In general, this study serves as an excellent starting point for future research on "creative thinking in physics." The principal result of this article is that are seven clusters, the authors who contribute the most and wherever the location of this research is carried out from the keyword “Creative Thinking in Physics”
Mechanical Wave Concept Inventory: Developing The Diagnostic Test Four-Tier For Evaluation
Full text linkChallenging for teachers in producing learning evaluation instruments that can diagnose students' abilities as well as student misconceptions was important. The diagnostic test four-tiers is one of the best assessment to diagnose students' misconceptions about physics concepts so that Mechanical Wave Concept Inventory has been developed in which form four-tiers diagnostic test. The instrument of the research are student sheet responses, and expert judgment reviews. Research and development frameworks' was included five processes that curriculum analysis processes, creating the design of the product, developing processes, implementing processes, and evaluating processes. The Pearson correlation sig. (2-tailed )resulted in which average r-count coefficient of 0.447 whose test instrument was concluded as valid. Alpha Cronbach's coefficient which was value of 0.90>0.70, so that the instrument was categorized as soon as possible reliable. Expert judgment index in which an average value of 0.87, that is categorized as very good. The quality of the questions was distributed with a classification of 24 good questions, 12 enough questions, and 4 bad questions. The difficulty level of the questions is divided into 7 questions in which easy categories as well as 33 questions in the medium category. Mechanical wave concept inventory was declared valid and reliable as well as good quality
The Effect of Problem-Based Learning and Students' Understanding of Physics Concepts On The Topic of The Doppler Effect
Full text linkUnderstanding the concept is one of the essential needs teachers pursue in improving student competence in the current era of openness. One of the learning models that can sharpen and encourage students' understanding of physics concepts is problem-based learning (PBL). Heretofore, research related to understanding concepts with PBL in understanding the Doppler effect material in depth is still minimal. Therefore, through this research, an exploration was carried out to determine the extent to which students' understanding of the Doppler effect material was carried out. The purpose of this study was to analyze the effect of PBL on students' conceptual understanding. This type of research is experimental with a total of 58 students. Both the experimental and the control classes were in class 11 of the science major of Christian Senior High School Ambon. The research procedure was a conceptual understanding test, which was carried out during the research process. The data analysis used was an independent sample T-test. The results showed that the average value of PBL class students' learning outcomes related to students' conceptual understanding was higher than conventional classes. It shows that PBL improve students' conceptual understanding of the Doppler effect material
Determination of the X-ray Linear Attenuation Coefficient of Clay-Originated Bricks in Central Java Province, Indonesia
Full text linkThe widespread use of radioactivity has culminated in adverse health consequences and has generated an entire health science study. It is established practice that certain precautions must be taken to avoid potential exposure to ionizing radiation like an x-ray. One way to control radiation hazards external is to use a radiation shield. In this study, clay-originated bricks were used as a shield and determine its linear attenuation coefficient of x-ray radiation. The bricks were collected from 5 regencies in Central Java province. Digital fluoroscopy was used as an x-ray radiation source and operated in 81 kV 32 mAs; also, it associated with the multi-purpose detector. It shows that linear attenuation coefficient of Boyolali, Klaten, Magelang, Temanggung, and Semarang bricks respectively are 0.8896 cm-1; 0.7455 cm-1; 0.7115 cm-1; 0.7254 cm-1; and 0.7972 cm-1. Furthermore, we calculate the half-value layer of each brick and indicates that brick from Boyolali is the most effective as a shielding among others that can reduce half value of x-ray radiation dose. This research is expected to enhance the systems integration of radiation shielding safeties and allow for the effective treatment of radiation sources for both humans and the environment
Development of Multiple Skill Laboratory Activity Model (MSLAM): An Instrument to Improve 21st Century Skills of Student
Full text linkThis study aims to develop a Multiple Skills Laboratory Activities Model (MSLAM), which can train and develop students' 4C skills (critical, creative, communication, and collaboration) through laboratory activities. This study used the Research and Development method with the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. There are 70 students ─ 18 males and 52 females ─ who participate in this research. The research instrument consisted of expert validation sheets, tests, and performance assessments. The Likert and Guttmann scale analyzed the MSLAM validation sheet. The test results were analyzed using a normalized gain score <g>, and the performance assessment was analyzed using a Likert scale. The results of expert validation show that MSLAM is very feasible to be implemented in laboratory activities. The test results showed an increase in students' critical and creative thinking skills in the MSLAM group were greater than in the Higher Order Thinking Laboratory/HOT Lab group. Students' communication and collaborative skills in the MSLAM group were greater than in the HOT Lab group. These results indicate that the MSLAM model developed can improve students' 4C skills through laboratory activities. Thus, the MSLAM can be applied in physics learning to develop students' various higher-order thinking skills
Implementation of Argument-Driven Inquiry Learning Model to Enhance Student’s Science Process Skills and Self-Efficacy
Full text linkThis study aims to improve students' science process skills and self-efficacy in light wave and optical instruments learning. The research design used was a pretest-posttest control group design. The study population was 8th-grade students of SMP Negeri 8 Banda Aceh, totalling 7 classes. The samples were selected by purposive sampling so that one experimental class and one control class were selected. Data analysis used non-parametric statistics with the Mann-Whitney U test and the calculation of the n-gain score. The results showed that there were significant differences between SPS and self-efficacy students between the implementation of ADI learning model and learning model applied in schools. The n-gain score of SPS and the self-efficacy of the experimental class was higher than the n-gain score of the control class. Therefore, it can be concluded that ADI learning model is effective in enhancing student’s SPS and self-efficacy
Implementation of e-Learning Module Based on Science Technology Engineering Mathematics on Solar Cells Topic
Full text linkThis study was conducted to test the validity, practicality and effectiveness of implementing STEM-based e-learning modules on the topic of solar cellss to be used as teaching materials for students. This research was conducted at the Unsyiah Physics Education Study Program. The research method used is the Quasi Experiment method, pretest-posttest control group design. The module validity data were analyzed using a validation sheet. The results showed that the STEM-based e-learning module was valid. The practicality of the module was analyzed using activity observation sheets and student response sheets. The results showed that the implementation of STEM-based e-learning modules was practical to increase student activity and received positive responses from students. The effectiveness of the module was analyzed using the Three Tier diagnostic test using the CRI index, comparing the pretest results with the posttest result, and tested for significance through the two-mean difference test using the independent sample t-test. The results showed that implementsi e-learning modules on topic STEM-based solar cellss are effective to reduce the level of misconceptions and may improve learning outcomes (N-gain) student