Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education最新文献

{"title":"Chlorogenic Acid Content of Local Robusta Coffee at Variations of Roasting Temperature","authors":"M. Misto, N. P. Lestari, E. Purwandari","doi":"10.15294/jpfi.v18i1.27889","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.27889","url":null,"abstract":"The roasting process has become the most necessary post-harvest handling process to be awarded in controlling coffee quality. In this research, the effect of roasting temperature has been investigated to the chlorogenic acid content on pure robusta coffee of local varieties and its mixture with soybeans as a parameter to control the quality. The temperature of roasting had variated at 195°C, 215°C, 225°C, 230°C, and 240°C. The chlorogenic acid contents have been obtained based on their maximum absorbances measured by a UV-Vis spectrophotometer at 290 nm wavelength range. The increase in roasting temperature reduces the chlorogenic acid levels because some have turned into melanoidin compounds. To increase the weight of Robusta coffee and change the taste of coffee, soybeans have been added as a coffee mixture. The results of the study were then extended to the observation of coffee quality on the content of chlorogenic acid it produces. The addition of soybeans by 10% can increase the chlorogenic acid content at a roasting temperature of 230°C around 5.12%, and there will be a decrease when the temperature is lowered. The addition of soybeans with a mass fraction of 20% of the total amount of coffee has increased the absorbance due to other antioxidant substances from the soybeans. The results of this study are expected to add insight to the public about the temperature required for the roasting process to obtain quality coffee with chlorogenic acid content that is still present after the roasting process.                                                                                         ","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46357087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Physics Demonstration Videos on Youtube (PDVY) as Physics Learning Media","authors":"A. I. Irvani, R. Warliani","doi":"10.15294/jpfi.v18i1.26723","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.26723","url":null,"abstract":"The availability of physics demonstration videos relevant to curriculum needs is still limited. The aims of this study were (1) to develop physics learning media in the form of demonstration videos; (2) testing the feasibility of using demonstration videos as a medium for learning physics; and (3) knowing student responses to demonstration videos. The name of this demonstration video is Physics Demonstration Videos on YouTube (PDVY). This video is available on the PDVY Indonesia YouTube channel with open access. This research uses research and development methods. The steps for making this demonstration video consist of analyzing the core standards and competency standards of physics subjects, designing storyboards, taking pictures, editing, initial testing, revising initial test results, field trials and revising the results of field trials. The trial was conducted on 129 high school students in Garut, Indonesia. The results showed that (1) the physics demonstration video was composed with input from the validator, two physics lecturers, and two physics teachers; (2) the demonstration video is suitable for use as a physics learning medium from the material and media aspects; and (3) excellent response from high school students and teachers. Based on the validation of both the content validator and the media validator, it shows that the design of the parabolic motion demonstration video is very valid. The benefit aspect gets the highest score. This shows that the video developed has a high use value in the learning process.                                                                                         ","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45499271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Science Process Skills Based on Programme for International Student Assessment Test and Observation Instruments of Senior High Schools","authors":"E. Agustiani, N. S. Aminah, R. Suryana","doi":"10.15294/jpfi.v18i1.29434","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.29434","url":null,"abstract":"This research aims to figure out the students' Science Process Skills (SPS) using problem tests of Programme for International Assessment (PISA) and observation instruments in Senior High School at Bojonegoro Regency. This work is descriptive research. As research subjects, 100 students in the eleventh grade were chosen randomly from three schools in 2019/2020. The Pisa test consists of 6 questions that have aspects of SPS: measuring, applying concepts, inferring, and predicting. The problem tests of PISA resulted that 36% of students attained scores above 60. Furthermore, students’ percentage could complete the measuring aspects, predicting aspects, applying concepts, and the inferring aspects were 64%, 38%, 36%, and 42%. Students’ percentage based on observation instruments' results were predicting 52%, applying concepts 43%, measuring 48%, inferring 46%, experimenting 0%, asking question 23%, classifying 37%, communicating 28%, and observing 55%. These are beneficial for teachers to improve the learning process according to student needs.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46727680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Develoment of The Computer Simulation of Oscillation in Physics Learning","authors":"Y. Sumardi, A. F. Amalia, U. N. Prabowo","doi":"10.15294/jpfi.v18i1.29040","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.29040","url":null,"abstract":"The simplest mechanical system that shows such motion oscillation is a simple pendulum, which consists of a mass suspended from a rope, so that it can swing freely in response to the force of gravity. This teaching material is in the Fundamental Physics subject. Other teaching materials related to oscillation motion are simple linear harmonic oscillations.  This research aimed to develop the computer simulation of oscillation in physics learning by using MATLAB. The use of simulations within teaching process had a positive impact on students’ being able to predict and explain the phenomena. It also designed to provide possibility to explore physics phenomenon which cannot be realized in school conditions.  The simulation can direct the student to reveal the existence of equilibrium between the two sides of an equation rather than causal relations. The research method used was Research and Development (RD) developed by Borg Gall (1983) for developing educational products. They are the pre-product form was developed by creating computer programs based on algorithms, validation through forum group discussion carried out by several lecturers to provide validation of the pre-product, major product revision, the pre-trial by 10 students, operational product revision, the operational product trial carried out by a class of students at the computer laboratory, final product revision, and dissemination.The steps were research and information collection, planning, develop a preliminary form of product, preliminary testing, main product revision, main field testing, and operational product revision. In the step of the main field testing, it was applied to the class of students. The 33 students and 6 lecturers were asked to respond about it.  A qualitative test review was conducted through expert judgement for validation. They provided an assessment of suitability between the item with the indicator in the form of a Likert scale with five answer options. Based on expert judgment realated to the feasibility of the test, V Aiken index is also calculated. The data analysis techniques were descriptive analysis conducted using Micros oft Excel and continued by looking for effective constributions to the relationship of each independent variable to work readiness. According to the statements of questionnaire given from the lecturers, the computer simulation of oscillation felt into a good and very good category. Meanwhile, the students’ responses showed that it was fair, good, and very good. The oscillation simulation software developed has good criteria and is suitable for use in learning oscillation systems. The benefit of this research is to determine the form of the wave propagation simulation and its superposition which later can be used for physics research and suitable for students to learn physics.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48308563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Induced Polarization and Resistivity Methods to Identify Subsurface Layers in Bauxite Deposits Area of Kendawangan, West Kalimantan","authors":"M. Muhardi, M. Anwar, K. Kaharudin","doi":"10.15294/jpfi.v18i1.29230","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.29230","url":null,"abstract":"Kendawangan Sub-district, Ketapang Regency is one of the areas in West Kalimantan Province containing minerals of economic value, namely bauxite deposits. This study has applied both induced polarization and resistivity methods. It aims to identify subsurface layers in the Kendawangan bauxite deposit area based on resistivity and chargeability distribution. Measurements in the field apply a north-south line using the dipole-dipole configuration, have a length of 144 m, and electrode distance of 3 m. The results showed that the subsurface layer in the study area identified the presence of bauxite deposits. In addition, it showed that the subsurface layers were topsoil, bauxite deposits, saprolite, and bedrock. Topsoil has a thickness of about 1 m, and it is a product of the weathering process. The bauxite deposit has a thickness of about 9 m, and it contains the minerals aluminum oxide, quartz, hematite, and titanium oxide. Saprolite has a thickness of about 2 - 4 m, and it contains aluminum silica (kaolinite) and minerals quartz, titanium oxide, zircon, and it is a weathering product of bedrock. The bedrock is at a depth of more than 10 m, which is interpreted as volcanic tuff, sandstone, and claystone.                             ","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47012190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Mathematical Physics 1 Module Based on Problem Based Instruction","authors":"I. R. Yanti, S. Trisna, R. Ramli, U. Usmeldi","doi":"10.15294/jpfi.v18i1.30162","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.30162","url":null,"abstract":"Mathematical Physics I is one of the courses that train students to think critically and creatively in the learning process. Therefore in this research developed a teaching material in the form of modules based on Problem Based Instruction (PBI). The module began with introduce students to a contextual problem that later ended with the presentation and analysis of student work. This type of research is the development of research using a stage model of Plomp, namely: (1) preliminary research, (2) prototyping phase, and (3) assessment phase.The research subjects involved lecturers and students from two campuses, namely Universitas Negeri Padang and STKIP PGRI West Sumatra. The research data was obtained through the validation sheet of modules that look at the feasibility module by module construction, content and the language used. Item analysis was conducted by using qualitative and quantitative analysis.Based on the results of the validation, results showed that the modules are very valid and ready for trial eligibility to students. Modules that are designed are categorized as very valid with a value of 84.66 and very practical with a practical value of 83.05.This result indicate that developmentof Mathematical Physics I module based on the Problem Based Instruction learning model can be used by students and lectures in learning process.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47167927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Virtual Blended Learning Based on Edmodo with Problem-Solving for Basic Physics","authors":"M. Kua, F. X. Dolo, N. W. Suparmi","doi":"10.15294/jpfi.v18i1.26825","DOIUrl":"https://doi.org/10.15294/jpfi.v18i1.26825","url":null,"abstract":"This research is based on the problem of changing learning patterns from face to face to online due to the COVID-19 pandemic. The objectives of this study were to develop virtual blended learning based on Edmodo with problem solving in Basic Physics courses and to describe the effectiveness of product based on trials data analysis. This research was conducted in Ngada Regency, East Nusa Tenggara province. The subjects in this study were the lecturers and students of the STKIP Citra Bakti science education study program. The measured aspect was the quality of the virtual blended learning product consists of content, presentation, and language which developed following the problem-solving learning model phase. The data obtained in this study were analyzed descriptively qualitatively to explain product quality. This product was developed with the ADDIE model proposed by Lee and Owen. The results showed that the product development had reached the evaluation stage with a mean validation score of 4.53 and was in the very good category. Otherwise, the quality of the results of the virtual blended learning trial based on problem solving from lecturers and students is in the very good category. Based on the information, developed virtual blended learning based on Edmodo with problem- solving was good to be implemented in Basic Physics courses.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42732381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Attitude for Physics: The Condition of High School Students","authors":"T. Tanti, A. Astalini, D. A. Kurniawan*, D. Darmaji, T. Puspitasari, I. Wardhana","doi":"10.15294/jpfi.v17i2.18919","DOIUrl":"https://doi.org/10.15294/jpfi.v17i2.18919","url":null,"abstract":"The purpose of this study was to determine student attitudes towards learning physics in high schools in the city of Jambi and Batang Hari. The method used is a survey type quantitative research method. The data collection technique in this study used purposive sampling technique with the research instrument used was a questionnaire instrument. The data analysis used in this research is descriptive analysis. Based on the results of the study, attitudes based on indicators of social implications, scientist normality, and attitudes towards physics research conducted at SMAN 8 Jambi City with the physics attitudes at SMAN 10 Batang Hari can be concluded that the results displayed are different from the category results and the number of respondents. So that there are different conditions from the two SMAs. This comparison also shows that SMAN 8 Kota Jambi shows a better attitude seen from the percentage and number of respondents.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43397714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Probing 8th Grade Students’ Conception about Heat and Temperature Using Three-Tier Test : A Case Study","authors":"V. Setyaningrum, W. Sopandi","doi":"10.15294/jpfi.v17i2.25272","DOIUrl":"https://doi.org/10.15294/jpfi.v17i2.25272","url":null,"abstract":"The aim of this study is to investigate the various categories of students' conceptions about heat and temperature, so that the misconceptions that students may have can be prevented and regenerated as early as possible.The subjects of this study were 203 8th grader students in one of the Junior High Schools in Mempawah District, West Kalimantan. Data was collected using a three-tier test developed by Kusumah (2013), questionnaire and interview.The data were analyzed and categorized based on their configuration of the answer, the reasons and confident rating index. Result showed that there are four main categories of students’ conceptions:understand the concepts;lack of knowledge; misconceptions; and error. In addition, students also still have 18 kinds of misconceptions about the heat and the temperature despite the material was studied in their 7th grade. Therefore the results of this study can be used as a basis for teachers so that learning process does not only focus on delivering material, but also improves students’ conceptions.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47713459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Conceptual Change Models on Students' Conceptual Understanding in Learning Physics","authors":"N. P. E. Adriana Sari, I. W. Santyasa, I. Gunadi","doi":"10.15294/jpfi.v17i2.27585","DOIUrl":"https://doi.org/10.15294/jpfi.v17i2.27585","url":null,"abstract":"This study aims at describing differences of students’ conceptual understanding in learning physics between students who learn with the conceptual change model (CCM) and direct learning model (DIM). This quasi-experimental research used the pretest-posttest one-way non-equivalent control group design. The study population were students of class XI. The sample was selected by random assignment technique. Data of students’ conceptual understanding was collected with a physics conceptual test. The test in the form of multiple choice with written justification consists of 20 items. Data were analyzed descriptively and ANACOVA. As a follow-up to ANACOVA, the Least Significant Difference (LSD) was used to test the comparison of the mean scores of the treatment groups. The results showed that there were differences in conceptual understanding between students’ studying with CCM and DIM. Need to make conceptual changes will occur optimally if physics learning uses CCM.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47767313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}