Pub Date : 2023-04-30DOI: 10.12928/jrkpf.v10i1.224
S. Sudirman, Vegisari Vegisari, H. Kuswanto, Eko Rudiansyah
Physics learning contains mathematical processes with various equations to interpret concepts or phenomena in the quantitative concept. Each material with different values owns material mechanical properties such as elasticity. Spreadsheets can help mathematical processes become more effective and efficient. The output of spreadsheets can be interpreted as graphs or diagrams that make it easier to understand concepts and compare the elasticity of each material. The material studied in this study is an aluminum alloy in terms of its elemental content. Spreadsheet analysis presents the values of the elasticity properties of each material in graphical form. The elasticity properties studied are the modulus of elasticity (Young modulus), yield strength (Yield strength), and maximum strength (Ultimate strength).
{"title":"Spreadsheet to analyze the comparative of elasticities properties of aluminum alloy materials","authors":"S. Sudirman, Vegisari Vegisari, H. Kuswanto, Eko Rudiansyah","doi":"10.12928/jrkpf.v10i1.224","DOIUrl":"https://doi.org/10.12928/jrkpf.v10i1.224","url":null,"abstract":"Physics learning contains mathematical processes with various equations to interpret concepts or phenomena in the quantitative concept. Each material with different values owns material mechanical properties such as elasticity. Spreadsheets can help mathematical processes become more effective and efficient. The output of spreadsheets can be interpreted as graphs or diagrams that make it easier to understand concepts and compare the elasticity of each material. The material studied in this study is an aluminum alloy in terms of its elemental content. Spreadsheet analysis presents the values of the elasticity properties of each material in graphical form. The elasticity properties studied are the modulus of elasticity (Young modulus), yield strength (Yield strength), and maximum strength (Ultimate strength).","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49653989","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 : 2023-04-30DOI: 10.12928/jrkpf.v10i1.234
E. Prima, Anggi Datiatur Rahmat, A. Setiawan
Cu2ZnSnS4 is a promising material for low-cost thin-film solar cells. This paper reports a new approach to fabricating a solar cell using a Superstrate and Substrate configuration. We utilized a non-vacuum deposition process to deposit Copper Zinc Tin Sulfate (CZTS) and Cadmium Sulphate (CdS) on a glass substrate. To achieve this, we adopted the sol-gel spin coating method for CZTS and the Chemical Bath Deposition (CBD) method for the CdS layer. The solar cell has two structures: ITO/Cu2ZnSnS4/CdS/Ag for substrate configuration and ITO/CdS/Cu2ZnSnS4/Ag for superstrate configuration. The Cu/(Zn+Sn) atomic ratio was set to 0.86, while Zn/Sn was set to 1.25. Our CZTS/CdS solar cell achieved a 48.7 × 10-6 % power conversion efficiency with a 1.40 eV band gap and 98.71 % external quantum efficiency at 373 nm for the superstrate configuration. For the substrate configuration, the power conversion efficiency was 19.0 × 10-6 % with a 1.49 eV bandgap and 95.74 % external quantum efficiency at 321 nm. Based on the results presented in the text, the CZTS solar cell with a superstrate configuration achieved a higher power conversion efficiency and external quantum efficiency than the substrate configuration. The superstrate configuration allowed for better light absorption in the CZTS layer and reduced the reflection of light back into the substrate. This configuration also prevented the back diffusion of CdS into CZTS and improved the electrical performance of the solar cell. Therefore, the superstrate configuration is more efficient than the substrate configuration for CZTS solar cells.
{"title":"Synthesis and fabrication of superstrate and substrate Cu2ZnSnS4/CdS thin film solar cells utilizing copper powder as local materials","authors":"E. Prima, Anggi Datiatur Rahmat, A. Setiawan","doi":"10.12928/jrkpf.v10i1.234","DOIUrl":"https://doi.org/10.12928/jrkpf.v10i1.234","url":null,"abstract":"Cu2ZnSnS4 is a promising material for low-cost thin-film solar cells. This paper reports a new approach to fabricating a solar cell using a Superstrate and Substrate configuration. We utilized a non-vacuum deposition process to deposit Copper Zinc Tin Sulfate (CZTS) and Cadmium Sulphate (CdS) on a glass substrate. To achieve this, we adopted the sol-gel spin coating method for CZTS and the Chemical Bath Deposition (CBD) method for the CdS layer. The solar cell has two structures: ITO/Cu2ZnSnS4/CdS/Ag for substrate configuration and ITO/CdS/Cu2ZnSnS4/Ag for superstrate configuration. The Cu/(Zn+Sn) atomic ratio was set to 0.86, while Zn/Sn was set to 1.25. Our CZTS/CdS solar cell achieved a 48.7 × 10-6 % power conversion efficiency with a 1.40 eV band gap and 98.71 % external quantum efficiency at 373 nm for the superstrate configuration. For the substrate configuration, the power conversion efficiency was 19.0 × 10-6 % with a 1.49 eV bandgap and 95.74 % external quantum efficiency at 321 nm. Based on the results presented in the text, the CZTS solar cell with a superstrate configuration achieved a higher power conversion efficiency and external quantum efficiency than the substrate configuration. The superstrate configuration allowed for better light absorption in the CZTS layer and reduced the reflection of light back into the substrate. This configuration also prevented the back diffusion of CdS into CZTS and improved the electrical performance of the solar cell. Therefore, the superstrate configuration is more efficient than the substrate configuration for CZTS solar cells.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42454805","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 : 2023-04-30DOI: 10.12928/jrkpf.v10i1.378
D. Thana, I. Pawarangan, Wilson Jefriyanto, Martina Pineng, Eko Suripto Pasinggi, Rali Sarira Bone, Yosep Mari', Conny Conny
Spent coffee grounds (SCG) are waste byproducts of the coffee brewing process and are frequently disposed of in landfills, which raises environmental issues. A thorough overview of the properties of coffee grounds has yet to accompany the utilization of coffee grounds in many applications. This study attempts to categorize different coffee grounds based on their morphological structure and composition/element characteristics using scanning electron microscopy (SEM) for microstructural analysis and Fourier transform infrared spectroscopy (FTIR) to figure out the functional groups in coffee grounds. Morphological structure analysis showed that Robusta and Arabica SCG were dominated by around 70% of carbon, oxygen, and nitrogen. FTIR analysis revealed seven different peaks in Robusta and Arabica coffee grounds. Finally, the high concentration of carbon in Robusta and Arabica coffee grounds led to promising electrochemical energy storage for electronics applications.
{"title":"Morphological structure and functional group of Toraja robusta and arabica spent coffee grounds for electronic device applications","authors":"D. Thana, I. Pawarangan, Wilson Jefriyanto, Martina Pineng, Eko Suripto Pasinggi, Rali Sarira Bone, Yosep Mari', Conny Conny","doi":"10.12928/jrkpf.v10i1.378","DOIUrl":"https://doi.org/10.12928/jrkpf.v10i1.378","url":null,"abstract":"Spent coffee grounds (SCG) are waste byproducts of the coffee brewing process and are frequently disposed of in landfills, which raises environmental issues. A thorough overview of the properties of coffee grounds has yet to accompany the utilization of coffee grounds in many applications. This study attempts to categorize different coffee grounds based on their morphological structure and composition/element characteristics using scanning electron microscopy (SEM) for microstructural analysis and Fourier transform infrared spectroscopy (FTIR) to figure out the functional groups in coffee grounds. Morphological structure analysis showed that Robusta and Arabica SCG were dominated by around 70% of carbon, oxygen, and nitrogen. FTIR analysis revealed seven different peaks in Robusta and Arabica coffee grounds. Finally, the high concentration of carbon in Robusta and Arabica coffee grounds led to promising electrochemical energy storage for electronics applications.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47185455","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 : 2023-04-30DOI: 10.12928/jrkpf.v10i1.216
Anisa Widyastuti, Elvine Heranita, M. I. Sukarelawan
During the pandemic, many physics teachers only deliver material without adequate learning assistance. This directly or indirectly has influenced students' motivation to learn physics. The analysis of motivation so far has only used the classical test theory approach, so it cannot describe motivation at the individual level. Therefore, this study analyzes students' motivation to learn physics using the Rasch model. This research uses a survey research type. The survey was conducted on 27 class X and XI students who were selected using convenience sampling. The instrument used is the Physics Motivation Questionnaire (PMQ), adapted from the Science Motivation Questionnaire (SQM) developed by Glynn et al. The PMQ uses a 5-point Likert rating scale. Motivation levels were collected online using the Google Forms platform. Motivation level data were analyzed using the Wright map, LVP (Logit Value of Person), and Differential Item Functioning (DIF). The analysis results show that the average level of student motivation is higher than the item difficulty level. Male and female students have the highest motivation on the factor/dimension of Career Motivation. Regarding Gender, male students are more anxious and worried about failing physics exams than girls. Meanwhile, female students were more motivated to study physics better than other students. So, there are differences in the motivation of male and female students. Teachers must insert particular messages for students so they both have positive motivation when studying physics. Students must stay focused on their learning efforts and keep trying to improve their understanding of physics.
{"title":"Comparison of students' physics motivation by gender using the Physics Motivation Questionnaire (PMQ): Rasch model analysis","authors":"Anisa Widyastuti, Elvine Heranita, M. I. Sukarelawan","doi":"10.12928/jrkpf.v10i1.216","DOIUrl":"https://doi.org/10.12928/jrkpf.v10i1.216","url":null,"abstract":"During the pandemic, many physics teachers only deliver material without adequate learning assistance. This directly or indirectly has influenced students' motivation to learn physics. The analysis of motivation so far has only used the classical test theory approach, so it cannot describe motivation at the individual level. Therefore, this study analyzes students' motivation to learn physics using the Rasch model. This research uses a survey research type. The survey was conducted on 27 class X and XI students who were selected using convenience sampling. The instrument used is the Physics Motivation Questionnaire (PMQ), adapted from the Science Motivation Questionnaire (SQM) developed by Glynn et al. The PMQ uses a 5-point Likert rating scale. Motivation levels were collected online using the Google Forms platform. Motivation level data were analyzed using the Wright map, LVP (Logit Value of Person), and Differential Item Functioning (DIF). The analysis results show that the average level of student motivation is higher than the item difficulty level. Male and female students have the highest motivation on the factor/dimension of Career Motivation. Regarding Gender, male students are more anxious and worried about failing physics exams than girls. Meanwhile, female students were more motivated to study physics better than other students. So, there are differences in the motivation of male and female students. Teachers must insert particular messages for students so they both have positive motivation when studying physics. Students must stay focused on their learning efforts and keep trying to improve their understanding of physics.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47632223","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 : 2023-04-30DOI: 10.12928/jrkpf.v10i1.198
Tri Windianingsih, N. Susanti, A. Alrizal
This study aims to analyze the influence of TPACK variables on junior high school teachers in Pasar Jambi District. The type of research used is quantitative research with a survey approach via WhatsApp groups and filling out questionnaires via google forms. The data collection technique used a questionnaire and then analyzed using the Structural Equation Model-Partial Least Square (SEM-PLS) method with SmartPLS software. From the results of the analysis, there are 5 out of 12 variable relationships that have a significant effect. Seven variables do not have a considerable impact: CK variables on TCK, CK on TPACK, PCK variables on TPACK, PK variables on PCK, PK variables on TPACK, PK variables to TPK, and TPK variable to TPACK. This shows that pedagogical and content knowledge does not significantly influence the teacher's TPACK ability. This research is expected to improve teacher TPACK competence, especially in technological knowledge, because teacher TPACK abilities are strongly influenced by technological knowledge.
{"title":"Analysis of TPACK (Technological Pedagogical and Content Knowledge) variables for middle school teachers through surveys in the Pasar Jambi district","authors":"Tri Windianingsih, N. Susanti, A. Alrizal","doi":"10.12928/jrkpf.v10i1.198","DOIUrl":"https://doi.org/10.12928/jrkpf.v10i1.198","url":null,"abstract":"This study aims to analyze the influence of TPACK variables on junior high school teachers in Pasar Jambi District. The type of research used is quantitative research with a survey approach via WhatsApp groups and filling out questionnaires via google forms. The data collection technique used a questionnaire and then analyzed using the Structural Equation Model-Partial Least Square (SEM-PLS) method with SmartPLS software. From the results of the analysis, there are 5 out of 12 variable relationships that have a significant effect. Seven variables do not have a considerable impact: CK variables on TCK, CK on TPACK, PCK variables on TPACK, PK variables on PCK, PK variables on TPACK, PK variables to TPK, and TPK variable to TPACK. This shows that pedagogical and content knowledge does not significantly influence the teacher's TPACK ability. This research is expected to improve teacher TPACK competence, especially in technological knowledge, because teacher TPACK abilities are strongly influenced by technological knowledge.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42357033","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}
Natalia Erna Setyaningsih, Agus Nu'man, Fifin Dewi Ratnasari, Danang Subarkah Hadi Kawuryan
The research aims to improve the effectiveness of fundamental physics practicum to determine the value of the Earth's gravitational acceleration, whether carried out online or offline. This type of research is development research. The research was conducted using the 4D method: define, design, development, and disseminate. The product developed as a module contains a guidebook into an electronic module by integrating a practicum video (recorded experiment) that contains how to use the tools and practicum work steps. Data collection techniques are carried out by interviews and questionnaires. Questionnaires are given to a material, language and media experts to find out the validity of the e-module. Questionnaires are also given to lecturers who teach fundamental physics courses and students participating in introductory physics courses to find out the feasibility of e-modules. From the study, the average score of material, language and media experts was 89.08%, stating that the e-module was very valid. At the same time, the average score for the feasibility test is 89.38% which states that the e-module is very feasible. Thus, the development of a fundamental physics practicum e-module can increase the effectiveness of the fundamental physics practicum in determining the value of the Earth's gravitational acceleration.
{"title":"Fundamental Physics Practicum e-module to determine the value of the Earth's gravitational acceleration based on recorded experiments","authors":"Natalia Erna Setyaningsih, Agus Nu'man, Fifin Dewi Ratnasari, Danang Subarkah Hadi Kawuryan","doi":"10.12928/jrkpf.v9i2.185","DOIUrl":"https://doi.org/10.12928/jrkpf.v9i2.185","url":null,"abstract":"The research aims to improve the effectiveness of fundamental physics practicum to determine the value of the Earth's gravitational acceleration, whether carried out online or offline. This type of research is development research. The research was conducted using the 4D method: define, design, development, and disseminate. The product developed as a module contains a guidebook into an electronic module by integrating a practicum video (recorded experiment) that contains how to use the tools and practicum work steps. Data collection techniques are carried out by interviews and questionnaires. Questionnaires are given to a material, language and media experts to find out the validity of the e-module. Questionnaires are also given to lecturers who teach fundamental physics courses and students participating in introductory physics courses to find out the feasibility of e-modules. From the study, the average score of material, language and media experts was 89.08%, stating that the e-module was very valid. At the same time, the average score for the feasibility test is 89.38% which states that the e-module is very feasible. Thus, the development of a fundamental physics practicum e-module can increase the effectiveness of the fundamental physics practicum in determining the value of the Earth's gravitational acceleration.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42061955","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}
This study aims to determine the effect of the project-based distance learning model on students' mastery of concepts on work and energy material. This research method is a mixed method with the Embedded Experimental Model design. Quantitative data came from working on the pre-test and post-test of mastery of the concept of 34 students, with the results of qualitative data through interviews and qualitative analysis. The results showed that the project-based distance learning model had a significant effect (d-effect size = 2.33) (α=0.000) on students' mastery of concepts, and the magnitude of the increase in concept mastery used N-gain 0.766. Qualitative analysis used crosstabulation and the results of student interviews, which stated that students experienced an increase in mastery of concepts after being given treatment. The findings of the researchers proved that there was student creativity which was shown in high categories in each indicator of project outcome assessment based on aspects of fluency (85.2%), flexibility (75%), originality (80.1%), and elaboration (75.7%).
{"title":"The effect of project-based distance learning on mastery of work and energy concepts","authors":"Relia Eksifa Larasati, L. Yuliati, P. Suwasono","doi":"10.12928/jrkpf.v9i2.34","DOIUrl":"https://doi.org/10.12928/jrkpf.v9i2.34","url":null,"abstract":"This study aims to determine the effect of the project-based distance learning model on students' mastery of concepts on work and energy material. This research method is a mixed method with the Embedded Experimental Model design. Quantitative data came from working on the pre-test and post-test of mastery of the concept of 34 students, with the results of qualitative data through interviews and qualitative analysis. The results showed that the project-based distance learning model had a significant effect (d-effect size = 2.33) (α=0.000) on students' mastery of concepts, and the magnitude of the increase in concept mastery used N-gain 0.766. Qualitative analysis used crosstabulation and the results of student interviews, which stated that students experienced an increase in mastery of concepts after being given treatment. The findings of the researchers proved that there was student creativity which was shown in high categories in each indicator of project outcome assessment based on aspects of fluency (85.2%), flexibility (75%), originality (80.1%), and elaboration (75.7%).","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45734627","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}
A. M. Hamdan, H. Yahya, Suci Muharrami, Rahmad Maulana
Domestic liquid waste has become the leading cause of aquatic pollution, with a percentage of 60-70%. One of the media that has the potential to process water is coco fibre. This study aimed to analyze the Effectiveness of both media in reducing restaurant waste. The experiment was conducted with variations in the Thickness of coco fibre and activated carbon media of 10, 15, and 20 cm and sand 40 mesh of 10 cm. The addition of sand media proved more effective in meeting quality standards with the Effectiveness of the reduction of Total Suspended Solid (TSS), Chemical oxygen demand (COD), and turbidity, the highest obtained at the Thickness of coco fibre media 20 cm activated carbon 20 cm, and sand 40 mesh 10 cm, which is respectively 95.78, 93.04, and 98.72%, which is influenced by the Thickness and time of contact of waste with the media.
{"title":"Quick sand filtration in restaurant waste treatment with coconut fiber and activated carbon media: application of Van der Waals Force","authors":"A. M. Hamdan, H. Yahya, Suci Muharrami, Rahmad Maulana","doi":"10.12928/jrkpf.v9i2.143","DOIUrl":"https://doi.org/10.12928/jrkpf.v9i2.143","url":null,"abstract":"Domestic liquid waste has become the leading cause of aquatic pollution, with a percentage of 60-70%. One of the media that has the potential to process water is coco fibre. This study aimed to analyze the Effectiveness of both media in reducing restaurant waste. The experiment was conducted with variations in the Thickness of coco fibre and activated carbon media of 10, 15, and 20 cm and sand 40 mesh of 10 cm. The addition of sand media proved more effective in meeting quality standards with the Effectiveness of the reduction of Total Suspended Solid (TSS), Chemical oxygen demand (COD), and turbidity, the highest obtained at the Thickness of coco fibre media 20 cm activated carbon 20 cm, and sand 40 mesh 10 cm, which is respectively 95.78, 93.04, and 98.72%, which is influenced by the Thickness and time of contact of waste with the media.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43907572","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}
This study aims to analyze student responses to online learning using the Sevima edlink application. The research includes a type of descriptive research with a quantitative approach. The research will be carried out in the 2021/2022 academic year. The study population was IKIP Muhammadiyah Maumere students, and the sample was 3rd and 5th-semester Physics Education Students, totaling 20 people. Sampling using a simple random sampling technique. Data was collected using a questionnaire specified in the Google Form form. Questionnaires were distributed to physics education students who took thermodynamics online courses in semesters 3 and 5. Data analysis using percentage technique. The results showed that 80.81% of students responded positively to using the Sevima Edlink application in thermodynamics lectures. From the analysis results, it can be concluded that the average student responds positively to taking online lectures on thermodynamics courses using the Sevima edlink application.
{"title":"How do students respond to the use of the Sevima Edlink Application in learning at the university?","authors":"S. Sahlan, P. Donuata, Nurul Fitriani","doi":"10.12928/jrkpf.v9i2.141","DOIUrl":"https://doi.org/10.12928/jrkpf.v9i2.141","url":null,"abstract":"This study aims to analyze student responses to online learning using the Sevima edlink application. The research includes a type of descriptive research with a quantitative approach. The research will be carried out in the 2021/2022 academic year. The study population was IKIP Muhammadiyah Maumere students, and the sample was 3rd and 5th-semester Physics Education Students, totaling 20 people. Sampling using a simple random sampling technique. Data was collected using a questionnaire specified in the Google Form form. Questionnaires were distributed to physics education students who took thermodynamics online courses in semesters 3 and 5. Data analysis using percentage technique. The results showed that 80.81% of students responded positively to using the Sevima Edlink application in thermodynamics lectures. From the analysis results, it can be concluded that the average student responds positively to taking online lectures on thermodynamics courses using the Sevima edlink application.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46532358","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}
Desti Ritdamaya, M. I. Sukarelawan, J. Jessica, L. Lince, Velysya Velysya
The pits left by unconventional tin miners in Bangka Belitung have formed a kind of water reservoir usually used for consumption when there is a drought or scarcity of clean water. This pit water has been contaminated with heavy metals and has a low pH, making it unfit for consumption. Therefore, this study aims to test the POSTRIZATION system that has been developed to increase pH and reduce heavy metal levels so that the water quality becomes fit for consumption. Increasing the pH and decreasing the metal content is carried out through 3 stages: composting, filtration, and distillation. The water sample came from one of the active mining pits in Baturusa, Bangka Regency. The pH level and metal content were measured before and after treatment. The pH level of the water was measured using a pH meter, and the metal content was measured using an Atomic Absorption Spectrometer (AAS). Changes in pH and metal content were calculated using the percentage technique. The POSTRIZATION results showed that the pH of the water increased to 7.6, and the metal content decreased by more than 93%. So, the POSTRIZATION system effectively restores the quality of pit water to fit for consumption. This, directly or indirectly, can prevent people from getting various diseases due to consuming water contaminated with heavy metals.
{"title":"POSTRIZATION system to reduce metal levels and increase the pH of pit water active tin mining","authors":"Desti Ritdamaya, M. I. Sukarelawan, J. Jessica, L. Lince, Velysya Velysya","doi":"10.12928/jrkpf.v9i2.266","DOIUrl":"https://doi.org/10.12928/jrkpf.v9i2.266","url":null,"abstract":"The pits left by unconventional tin miners in Bangka Belitung have formed a kind of water reservoir usually used for consumption when there is a drought or scarcity of clean water. This pit water has been contaminated with heavy metals and has a low pH, making it unfit for consumption. Therefore, this study aims to test the POSTRIZATION system that has been developed to increase pH and reduce heavy metal levels so that the water quality becomes fit for consumption. Increasing the pH and decreasing the metal content is carried out through 3 stages: composting, filtration, and distillation. The water sample came from one of the active mining pits in Baturusa, Bangka Regency. The pH level and metal content were measured before and after treatment. The pH level of the water was measured using a pH meter, and the metal content was measured using an Atomic Absorption Spectrometer (AAS). Changes in pH and metal content were calculated using the percentage technique. The POSTRIZATION results showed that the pH of the water increased to 7.6, and the metal content decreased by more than 93%. So, the POSTRIZATION system effectively restores the quality of pit water to fit for consumption. This, directly or indirectly, can prevent people from getting various diseases due to consuming water contaminated with heavy metals.","PeriodicalId":17730,"journal":{"name":"Jurnal Riset dan Kajian Pendidikan Fisika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45979770","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}
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