Pub Date : 2020-01-01DOI: 10.15294/jpfi.v16i1.12629
I. Sriyanti, L. Marlina, J. Jauhari
The Cromaloena odorata (COE) contains phenols, flavonoids, tannins, alkaloids, saponins, steroids that possess diverse therapeutic effects. However, COE has poor solubility in water and poor absorbtion in the body. Incorporation of COE in nanofiber system is a promising way to increase CEO solubility. One of the method to produce nanofiber is electrospinning. The electrospinning process there are three of the most important process parameters are applied flowrate, voltage and TCD. In this study we developed optimized condition for electrospinning process of polyvinyl alcohol (PVA)/CEO and their characterization. The Scanning electron microscopy (SEM) analysis showed that modification of flowrate and TCD did not affect the morphology of PVA and COE fiber. However fiber diameter decreased when lower flowrate, higher voltage was applied, and TCD. Fourier Transform Infrared (FTIR) study was conducted to identify possible intermolecular interaction between PVA/COE that has potential application as antimicrobial wound dressing.
{"title":"Optimization of The Electrospinning Process for Preparation of Nanofibers From Poly (Vinyl Alcohol) (PVA) and Chromolaena odorata L. Extrac (COE)","authors":"I. Sriyanti, L. Marlina, J. Jauhari","doi":"10.15294/jpfi.v16i1.12629","DOIUrl":"https://doi.org/10.15294/jpfi.v16i1.12629","url":null,"abstract":"The Cromaloena odorata (COE) contains phenols, flavonoids, tannins, alkaloids, saponins, steroids that possess diverse therapeutic effects. However, COE has poor solubility in water and poor absorbtion in the body. Incorporation of COE in nanofiber system is a promising way to increase CEO solubility. One of the method to produce nanofiber is electrospinning. The electrospinning process there are three of the most important process parameters are applied flowrate, voltage and TCD. In this study we developed optimized condition for electrospinning process of polyvinyl alcohol (PVA)/CEO and their characterization. The Scanning electron microscopy (SEM) analysis showed that modification of flowrate and TCD did not affect the morphology of PVA and COE fiber. However fiber diameter decreased when lower flowrate, higher voltage was applied, and TCD. Fourier Transform Infrared (FTIR) study was conducted to identify possible intermolecular interaction between PVA/COE that has potential application as antimicrobial wound dressing.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":"77 1","pages":"47-56"},"PeriodicalIF":0.6,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67006538","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}
Pub Date : 2020-01-01DOI: 10.15294/jpfi.v16i1.23596
R. Rahmatullah, S. Suparno
This development research aims to make a tool and test its ability to absorb the heat in light radiation by colored surfaces (black, dark green, blue, white). The benefit of this research is to present a simple laboratory that can be used in physics education class as a test tool for heat absorption. The research method that applied is Microcomputer Based Laboratory (MBL). The software that used is LabVIEW which connected to Arduino Uno hardware and heat source. The appropriate set of tools and materials is then tested for eligibility. The feasibility test of the device is reviewed from the aspect of content, linguistic, presentation and graphic by an expert validator as well as the compatibility of the findings with the theory. The results found that the darker the color of the object, the greater the ability of heat absorption and vice versa. Changes in power at a light source can affect changes in maximum temperature in the color absorption of heat. The greater the power provided by the light source, the greater the increase in maximum temperature. This development research concludes that the tools are feasible to use and appropriate based on existing theories.
{"title":"The Development of Experimental Absorption Based on Arduino-Uno and Labview on Light Radiation by Colourful Surface","authors":"R. Rahmatullah, S. Suparno","doi":"10.15294/jpfi.v16i1.23596","DOIUrl":"https://doi.org/10.15294/jpfi.v16i1.23596","url":null,"abstract":"This development research aims to make a tool and test its ability to absorb the heat in light radiation by colored surfaces (black, dark green, blue, white). The benefit of this research is to present a simple laboratory that can be used in physics education class as a test tool for heat absorption. The research method that applied is Microcomputer Based Laboratory (MBL). The software that used is LabVIEW which connected to Arduino Uno hardware and heat source. The appropriate set of tools and materials is then tested for eligibility. The feasibility test of the device is reviewed from the aspect of content, linguistic, presentation and graphic by an expert validator as well as the compatibility of the findings with the theory. The results found that the darker the color of the object, the greater the ability of heat absorption and vice versa. Changes in power at a light source can affect changes in maximum temperature in the color absorption of heat. The greater the power provided by the light source, the greater the increase in maximum temperature. This development research concludes that the tools are feasible to use and appropriate based on existing theories.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":"16 1","pages":"41-46"},"PeriodicalIF":0.6,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67006564","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}
Pub Date : 2020-01-01DOI: 10.15294/jpfi.v16i1.18571
I. Çolak, M. Erol
This work provides an approach for simplifying and teaching of the confusing topic of Polarisation of light and relating Malus’s Law. Teaching Polarisation and the Malus’s Law are modestly achieved by means of smartphones with a convenient light meter application. The apparatus is designed so that the polarizer, the analyser, the laser light source and the smartphone are precisely aligned on a rail. During the performance, the angle of the analyser is basically varied with respect to the polariser and the transmitted light intensity is measured by the light meter application. The results clearly show that the transmitted light intensity is directly proportional to the squared polarization angle. The approach surely provides accessibility for physics teachers and would help students to learn and internalize Polarisation and relating Malus’s Law in a better manner.
{"title":"Realization of Polarization and Malus’s Law Using The Smartphones","authors":"I. Çolak, M. Erol","doi":"10.15294/jpfi.v16i1.18571","DOIUrl":"https://doi.org/10.15294/jpfi.v16i1.18571","url":null,"abstract":"This work provides an approach for simplifying and teaching of the confusing topic of Polarisation of light and relating Malus’s Law. Teaching Polarisation and the Malus’s Law are modestly achieved by means of smartphones with a convenient light meter application. The apparatus is designed so that the polarizer, the analyser, the laser light source and the smartphone are precisely aligned on a rail. During the performance, the angle of the analyser is basically varied with respect to the polariser and the transmitted light intensity is measured by the light meter application. The results clearly show that the transmitted light intensity is directly proportional to the squared polarization angle. The approach surely provides accessibility for physics teachers and would help students to learn and internalize Polarisation and relating Malus’s Law in a better manner.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":"16 1","pages":"9-13"},"PeriodicalIF":0.6,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67006248","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.19633
I. Rahayu, N. Nurhasanah, R. Adriat
Research has been conducted by predicting cases of dengue hemorrhagic fever based on weather parameters. The data used are weather parameters in the form of air temperature data, air humidity, rainfall, duration of solar radiation and wind speed as input data and data on dengue hemorrhagic fever cases as the target data. This study aims to see the confirmation of dengue hemorrhagic parameters in Pontianak. The benefit in the field of education is that students and teachers are aware of the dangers of dengue because it can cause death. The method used is back propagation neural networks with the best network architecture in predicting cases of dengue hemorrhagic fever are [50 40 30 1] and binary sigmoid activation function, bipolar sigmoid and linear function. The activation function will determine whether the signal from the neuron input will be forwarded to other neurons and is also used to determine the output of a neuron. Network training correlation value is 0.9995 (very strong correlation) with MSE 0.0001 and network testing is 0.9325 (very strong correlation) with MSE 1.61. Determination coefficient serve as accuracy with values obtained is 0.85, which means that 85% of weather parameters can be used as input in predicting the incidence of dengue hemorrhagic fever in Pontianak City.
{"title":"Prediction of Dengue Hemorrhagic Fever Cases Based on Weather Parameters Using Back Propagation Neural Networks (Case Study in Pontianak City)","authors":"I. Rahayu, N. Nurhasanah, R. Adriat","doi":"10.15294/jpfi.v15i2.19633","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.19633","url":null,"abstract":"Research has been conducted by predicting cases of dengue hemorrhagic fever based on weather parameters. The data used are weather parameters in the form of air temperature data, air humidity, rainfall, duration of solar radiation and wind speed as input data and data on dengue hemorrhagic fever cases as the target data. This study aims to see the confirmation of dengue hemorrhagic parameters in Pontianak. The benefit in the field of education is that students and teachers are aware of the dangers of dengue because it can cause death. The method used is back propagation neural networks with the best network architecture in predicting cases of dengue hemorrhagic fever are [50 40 30 1] and binary sigmoid activation function, bipolar sigmoid and linear function. The activation function will determine whether the signal from the neuron input will be forwarded to other neurons and is also used to determine the output of a neuron. Network training correlation value is 0.9995 (very strong correlation) with MSE 0.0001 and network testing is 0.9325 (very strong correlation) with MSE 1.61. Determination coefficient serve as accuracy with values obtained is 0.85, which means that 85% of weather parameters can be used as input in predicting the incidence of dengue hemorrhagic fever in Pontianak City.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47843549","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.15246
R. Putri, J. Jumadi, A. Ariswan, H. Kuswanto
Problem-solving skills is necessary to be mastered by students to help them in solving the problems of their daily life in the future. The purpose of this study was to map the student problem-solving skills after inquiry learning in Physics subject, impulse, and momentum in class X SMAN 1 Prambanan, Yogyakarta. Experimental research model with one-shot case study design was used in this study. Data collection was performed through essays at the end of the learning process. The results of the mapping show that students have different problem-solving skills levels at each stage. At the stage of problem identification, students were in a very good category. At the stage of planning the problem solution and problem-solving implementation, the students were in a good category, while in results evaluation, the students were in a fairly good category. The result of this study can contribute to giving the point of view to the teacher about students' problem-solving skills level based on the indicators as well as giving the additional information as a literature in the topic of students’ problem-solving skills after inquiry learning.
{"title":"Mapping Students' Problem-Solving Skills in Physics Subject After Inquiry Learning at Class X SMAN 1 Prambanan","authors":"R. Putri, J. Jumadi, A. Ariswan, H. Kuswanto","doi":"10.15294/jpfi.v15i2.15246","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.15246","url":null,"abstract":"Problem-solving skills is necessary to be mastered by students to help them in solving the problems of their daily life in the future. The purpose of this study was to map the student problem-solving skills after inquiry learning in Physics subject, impulse, and momentum in class X SMAN 1 Prambanan, Yogyakarta. Experimental research model with one-shot case study design was used in this study. Data collection was performed through essays at the end of the learning process. The results of the mapping show that students have different problem-solving skills levels at each stage. At the stage of problem identification, students were in a very good category. At the stage of planning the problem solution and problem-solving implementation, the students were in a good category, while in results evaluation, the students were in a fairly good category. The result of this study can contribute to giving the point of view to the teacher about students' problem-solving skills level based on the indicators as well as giving the additional information as a literature in the topic of students’ problem-solving skills after inquiry learning.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42632836","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.17246
Della Dian Nooritasari, M. Rahmadiyah, S. Kusairi
This study is aimed to compare the understanding of the concepts of secondary school students (junior and senior high school) and pre-service physics teachers in direct current electric circuits. This research was survey research using the quantitative descriptive method. The results showed that there were no significant difference among the junior high school, senior high school, and pre-service physics teacher students with the categories classified as sufficient for junior high school and pre-service physics teacher. However, senior high school students were still relatively weak. The difficulties were found in interpreting formulas and conceptual errors. This research provides practical benefits to the concept of electrical circuits, especially about the low mastery of student’s concepts. The same mistakes at every level of education showed that there are misconceptions that are difficult to eliminate. It is needed to have more effort to master the concept deeply.
{"title":"The Comparison of Conceptual Understanding Between Secondary School Students and Pre-Service Physics Teacher in Direct Current Electric Circuit","authors":"Della Dian Nooritasari, M. Rahmadiyah, S. Kusairi","doi":"10.15294/jpfi.v15i2.17246","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.17246","url":null,"abstract":"This study is aimed to compare the understanding of the concepts of secondary school students (junior and senior high school) and pre-service physics teachers in direct current electric circuits. This research was survey research using the quantitative descriptive method. The results showed that there were no significant difference among the junior high school, senior high school, and pre-service physics teacher students with the categories classified as sufficient for junior high school and pre-service physics teacher. However, senior high school students were still relatively weak. The difficulties were found in interpreting formulas and conceptual errors. This research provides practical benefits to the concept of electrical circuits, especially about the low mastery of student’s concepts. The same mistakes at every level of education showed that there are misconceptions that are difficult to eliminate. It is needed to have more effort to master the concept deeply.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49100953","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.14365
A. Jufriadi, H. D. Ayu
Monitoring of underground water level with integrated data of geoelectric, logging, cutting and pumping has been done in industrial area of Candi Sub-district, Sidoarjo, which is productive aquifers with widespread area. The integrated study showed that monitoring aquifers in industrial wells has carried out at depths of 140-165 meters. The lithology of the aquifer layer consists of sand layer, clay, and gravel with a low resistivity value of 14.7 to 46.8 ohmmeters. The monitoring results showed that the use of underground water at night was higher than the day and the use on workday was higher than on holiday. The stable debit generated by monitoring wells was 8.41 lt/sec and the groundwater level would return to stable 2.17 meters if the well is rested for 3 hours. The implication of this study was monitorable of the dynamics underground water levels periodically.
{"title":"Underground Water-Level Monitoring by Integrated Study of Geoelectric, Logging, Cutting and Pumping Data in Industrial Area of Candi Sub-District, Sidoarjo","authors":"A. Jufriadi, H. D. Ayu","doi":"10.15294/jpfi.v15i2.14365","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.14365","url":null,"abstract":"Monitoring of underground water level with integrated data of geoelectric, logging, cutting and pumping has been done in industrial area of Candi Sub-district, Sidoarjo, which is productive aquifers with widespread area. The integrated study showed that monitoring aquifers in industrial wells has carried out at depths of 140-165 meters. The lithology of the aquifer layer consists of sand layer, clay, and gravel with a low resistivity value of 14.7 to 46.8 ohmmeters. The monitoring results showed that the use of underground water at night was higher than the day and the use on workday was higher than on holiday. The stable debit generated by monitoring wells was 8.41 lt/sec and the groundwater level would return to stable 2.17 meters if the well is rested for 3 hours. The implication of this study was monitorable of the dynamics underground water levels periodically.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47541629","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.12656
S. T. M. Famani, M. R. S. S. N. Ayub, D. N. Sudjito
The purpose of this research is to make a learning design on Faraday’s Induction Law using a PhET Faraday’s Electromagnetic Lab simulation and to investigate the effectiveness of the design on students' understanding. Descriptive research was used as the method of this research. The instruments of this research were the observation sheet on students' attitudes and learning activities, questionnaires, and cognitive evaluation test questions. There were 14 students of grade IX of a Junior High School in Salatiga as the respondents of this research. The data collected from the research instruments were then analyzed using the descriptive qualitative technique. Based on data analysis of the observation results of learning activities, students' attitudes, questionnaires, and cognitive evaluation test scores; the results showed that the learning design for Faraday’s Induction Law using the PhET simulation of Faraday's Electromagnetic Lab was effective to help students understand the Faraday's Induction Law.
{"title":"Physics Learning Design of Faraday's Induction Law Material Using PhET Simulation","authors":"S. T. M. Famani, M. R. S. S. N. Ayub, D. N. Sudjito","doi":"10.15294/jpfi.v15i2.12656","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.12656","url":null,"abstract":"The purpose of this research is to make a learning design on Faraday’s Induction Law using a PhET Faraday’s Electromagnetic Lab simulation and to investigate the effectiveness of the design on students' understanding. Descriptive research was used as the method of this research. The instruments of this research were the observation sheet on students' attitudes and learning activities, questionnaires, and cognitive evaluation test questions. There were 14 students of grade IX of a Junior High School in Salatiga as the respondents of this research. The data collected from the research instruments were then analyzed using the descriptive qualitative technique. Based on data analysis of the observation results of learning activities, students' attitudes, questionnaires, and cognitive evaluation test scores; the results showed that the learning design for Faraday’s Induction Law using the PhET simulation of Faraday's Electromagnetic Lab was effective to help students understand the Faraday's Induction Law.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43107355","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.12367
T. Abdjul, N. Ntobuo, C. Payu
This study aims to develop virtual laboratory-based learning in physics subjects to improve the learning outcomes of high school students. This research is a research development with a 4-D model (define, design, develop, and dissemination). The results showed that the learning tools developed were categorized very well based on expert validation. Practical learning tools are used with an average value for the implementation of the learning process categorized very well and the average response of students to virtual laboratory based learning is very good. Student learning activities increased significantly after participating in learning. This research produces a valid, practical and effective learning tool by utilizing virtual laboratory media to improve student learning outcomes.
{"title":"Development of Virtual Laboratory-Based of Learning to Improve Physics Learning Outcomes of High School Students","authors":"T. Abdjul, N. Ntobuo, C. Payu","doi":"10.15294/jpfi.v15i2.12367","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.12367","url":null,"abstract":"This study aims to develop virtual laboratory-based learning in physics subjects to improve the learning outcomes of high school students. This research is a research development with a 4-D model (define, design, develop, and dissemination). The results showed that the learning tools developed were categorized very well based on expert validation. Practical learning tools are used with an average value for the implementation of the learning process categorized very well and the average response of students to virtual laboratory based learning is very good. Student learning activities increased significantly after participating in learning. This research produces a valid, practical and effective learning tool by utilizing virtual laboratory media to improve student learning outcomes.","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43400613","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}
Pub Date : 2019-07-26DOI: 10.15294/jpfi.v15i2.21937
A. Adhi, S. Sismanto, A. Setiawan
Semi-infinite slab modeling has been made through inverse data gravity using Matlab. Inversion of gravity data is done by first determining the simulation data. Forward modeling uses simulation data to produce an initial guess inversion model expressed with parameters n0 (1), n0 (2), n0 (3) and n0 (4). The forward modeling is performed on the next initial guess that the value of the misfit is as small as possible through an iteration using the Jacobian matrix. Accuracy of inversion results is determined by the initial guess and the number of iterations. The results obtained show that inversion modeling is more valid in the inversion modeling process compared to advanced modeling, because the value of the parameters sought is generated from mathematical observations of the observation data. Guesses greatly affect the results of inversions obtained. Initial guesses are given in the form of parameters n0 (1), n0 (2), n0 (3) and n0 (4). The initial guess for the parameters n0 (1), and n0 (2) that are made far deviant does not affect inversion. The initial guess for the parameters n0 (3), and n0 (4) that are made deviating far influences the inversion caused by a very small RCON value so that the result is NAN
{"title":"Invers Modeling Gravity Data for Semi-Infinite Slab Using Matlab","authors":"A. Adhi, S. Sismanto, A. Setiawan","doi":"10.15294/jpfi.v15i2.21937","DOIUrl":"https://doi.org/10.15294/jpfi.v15i2.21937","url":null,"abstract":"Semi-infinite slab modeling has been made through inverse data gravity using Matlab. Inversion of gravity data is done by first determining the simulation data. Forward modeling uses simulation data to produce an initial guess inversion model expressed with parameters n0 (1), n0 (2), n0 (3) and n0 (4). The forward modeling is performed on the next initial guess that the value of the misfit is as small as possible through an iteration using the Jacobian matrix. Accuracy of inversion results is determined by the initial guess and the number of iterations. The results obtained show that inversion modeling is more valid in the inversion modeling process compared to advanced modeling, because the value of the parameters sought is generated from mathematical observations of the observation data. Guesses greatly affect the results of inversions obtained. Initial guesses are given in the form of parameters n0 (1), n0 (2), n0 (3) and n0 (4). The initial guess for the parameters n0 (1), and n0 (2) that are made far deviant does not affect inversion. The initial guess for the parameters n0 (3), and n0 (4) that are made deviating far influences the inversion caused by a very small RCON value so that the result is NAN","PeriodicalId":42020,"journal":{"name":"Jurnal Pendidikan Fisika Indonesia-Indonesian Journal of Physics Education","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46003231","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：