Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia最新文献
Pub Date : 2019-10-04DOI: 10.4108/eai.18-10-2018.2287316
P. Putra, D. Syah, Baginda Halim Simatupang
Differences in interests between owners and managers cause information submitted to financial statements to be incorrect. The interests of owners who want increased company performance and value cause managers to plan strategies, one of which is tax avoidance. Therefore, this study aims to determine the conflict of interest between managers and owners who are described through institutional ownership of tax avoidance practices. This research was conducted on manufacturing companies listed on the Indonesia and Singapore Stock Exchanges. The results of this study became the basis of tax avoidance practices that occurred in the two countries as an implication of agency theory.
{"title":"Institutional Ownership and Tax Avoidance: A Review Agency Theory","authors":"P. Putra, D. Syah, Baginda Halim Simatupang","doi":"10.4108/eai.18-10-2018.2287316","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287316","url":null,"abstract":"Differences in interests between owners and managers cause information submitted to financial statements to be incorrect. The interests of owners who want increased company performance and value cause managers to plan strategies, one of which is tax avoidance. Therefore, this study aims to determine the conflict of interest between managers and owners who are described through institutional ownership of tax avoidance practices. This research was conducted on manufacturing companies listed on the Indonesia and Singapore Stock Exchanges. The results of this study became the basis of tax avoidance practices that occurred in the two countries as an implication of agency theory.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125312568","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 : 2019-10-04DOI: 10.4108/eai.18-10-2018.2287426
R. Restu, H. Syahputra, S. Gultom
Industrial Revolution 4.0 has urged the higher education to change the way they work. Changes in the form of work indeed require the readiness of infrastructure and human resources. To address these challenges, Universitas Negeri Medan (Unimed), Indonesia, has developed an integrated learning information system to facilitate learning in the digital era. However, the next challenge is to prepare human resources who will use the information system to optimize learning activities. Therefore, this study aims to map Unimed's human resource readiness to carry out learning in the industrial revolution era 4.0. The subject of this study was an active lecturer at the state public university. With random sampling, this study received 158 samples from 7 Faculties in Unimed. Furthermore, the data were analyzed by descriptive statistics to review the competency of using IT for educational and research activities held by lecturers. The results of this study indicate that human resources in Unimed have high readiness and potential in the implementation of digital learning. Policymakers can synchronize competencies and specific needs of lecturers related to their field of work with the SI that has been developed.
{"title":"The Readiness of Universitas Negeri Medan to Deal with the Industrial Revolution 4.0","authors":"R. Restu, H. Syahputra, S. Gultom","doi":"10.4108/eai.18-10-2018.2287426","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287426","url":null,"abstract":"Industrial Revolution 4.0 has urged the higher education to change the way they work. Changes in the form of work indeed require the readiness of infrastructure and human resources. To address these challenges, Universitas Negeri Medan (Unimed), Indonesia, has developed an integrated learning information system to facilitate learning in the digital era. However, the next challenge is to prepare human resources who will use the information system to optimize learning activities. Therefore, this study aims to map Unimed's human resource readiness to carry out learning in the industrial revolution era 4.0. The subject of this study was an active lecturer at the state public university. With random sampling, this study received 158 samples from 7 Faculties in Unimed. Furthermore, the data were analyzed by descriptive statistics to review the competency of using IT for educational and research activities held by lecturers. The results of this study indicate that human resources in Unimed have high readiness and potential in the implementation of digital learning. Policymakers can synchronize competencies and specific needs of lecturers related to their field of work with the SI that has been developed.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131670701","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 : 2019-10-04DOI: 10.4108/eai.18-10-2018.2287192
F. Firmansyah, E. Gradini, B. Yustinanningrum, N. Lubis
This study aims to compare the implementation of 3 teaching strategies; Direct Instruction, Cooperative Learning, and Problem Based Instruction in the geometry classroom. Cabri 3D was used as media to teach geometry in a classroom where 38 students participated as the subject in this study. The instructions were implemented for 8 meetings to evaluate the practicality of Cabri 3D in Direct Instruction, Cooperative Learning, and Problem Based Instruction. The result indicates that each instruction has their own advantages but generally, Problem Based Instruction is the best teaching strategies to conduct geometry class. The practicality based on the average score of implementation in Direct Instruction is 2.47 (good), Cooperative Learning is 2.54 (very good), and Problem Based Instruction is 2.49 (good). Teacher activities in all of the three learning instructions are in a good category, Direct Instruction is 3.67 (good), Cooperative Learning is 3.82 (good), and Problem-Based is 3.99 (good). This finding supports the theories in using Cabri 3D as teaching media in mathematics classroom.
{"title":"Comparison of The Implementation of Direct Instruction, Problem-Based Instruction, and Cooperative Learning using Cabri 3D on Geometry","authors":"F. Firmansyah, E. Gradini, B. Yustinanningrum, N. Lubis","doi":"10.4108/eai.18-10-2018.2287192","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287192","url":null,"abstract":"This study aims to compare the implementation of 3 teaching strategies; Direct Instruction, Cooperative Learning, and Problem Based Instruction in the geometry classroom. Cabri 3D was used as media to teach geometry in a classroom where 38 students participated as the subject in this study. The instructions were implemented for 8 meetings to evaluate the practicality of Cabri 3D in Direct Instruction, Cooperative Learning, and Problem Based Instruction. The result indicates that each instruction has their own advantages but generally, Problem Based Instruction is the best teaching strategies to conduct geometry class. The practicality based on the average score of implementation in Direct Instruction is 2.47 (good), Cooperative Learning is 2.54 (very good), and Problem Based Instruction is 2.49 (good). Teacher activities in all of the three learning instructions are in a good category, Direct Instruction is 3.67 (good), Cooperative Learning is 3.82 (good), and Problem-Based is 3.99 (good). This finding supports the theories in using Cabri 3D as teaching media in mathematics classroom.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"40 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116405764","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 : 2019-10-04DOI: 10.4108/eai.18-10-2018.2287338
U. Seetawan, A. Seetawan, C. Seetawan, Kunchit Singsook, T. Seetawan
The Science Technology Engineering the Arts and Mathematics (STEAM) education was trend to change from traditional education philosophy based on standardized test scores to a modern trade learning process. We proposed the innovative thinking skills for under graduate, graduate and high school students in ASEAN counties using new fabrication of thermoelectric device (TED) kit. The TED kit was developed to understand and create basic science and applied science knowledges such as energy, heat, heat converse to electricity, materials and micro generator and refrigerator applications. The 300 students from Indonesia, Myanmar, Vietnam, Loa, Cambodia and Thailand counties have ASEAN-TED Workshop 2018 in SakonNakonRajabhat University (SNRU), Thailand. They are most satisfaction with designing and fabricating thermoelectric cell and thermoelectric devices by them self to create a knowledge of technology and get new idea innovation. The workshop has impacted with students to fabricate new 18 thermoelectric prototypes developing to innovation show and competition in ASEAN-Thermoelectric device fabrication and invention fair 2018 on 1st August 2018 at SNRU every year.
{"title":"Student’s Skills of Innovative Thinking using Thermoelectric Devices for STEAM Education in ASEAN","authors":"U. Seetawan, A. Seetawan, C. Seetawan, Kunchit Singsook, T. Seetawan","doi":"10.4108/eai.18-10-2018.2287338","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287338","url":null,"abstract":"The Science Technology Engineering the Arts and Mathematics (STEAM) education was trend to change from traditional education philosophy based on standardized test scores to a modern trade learning process. We proposed the innovative thinking skills for under graduate, graduate and high school students in ASEAN counties using new fabrication of thermoelectric device (TED) kit. The TED kit was developed to understand and create basic science and applied science knowledges such as energy, heat, heat converse to electricity, materials and micro generator and refrigerator applications. The 300 students from Indonesia, Myanmar, Vietnam, Loa, Cambodia and Thailand counties have ASEAN-TED Workshop 2018 in SakonNakonRajabhat University (SNRU), Thailand. They are most satisfaction with designing and fabricating thermoelectric cell and thermoelectric devices by them self to create a knowledge of technology and get new idea innovation. The workshop has impacted with students to fabricate new 18 thermoelectric prototypes developing to innovation show and competition in ASEAN-Thermoelectric device fabrication and invention fair 2018 on 1st August 2018 at SNRU every year.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"68 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122548335","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 : 2016-10-10DOI: 10.4108/eai.18-10-2018.2287210
Y. Kurniawati
The student’s prediction skills in chemistry experiments areimportant skills for pre-service chemistry students to stimulate students reflective thinking at each stage of chemistry experiments, qualitatively and quantitatively. A Virtual Chemistry Laboratory was designed to provide opportunities for students to practicing kinds of chemistry experiments everywhere, anytime, and repeatedly, before exercising the real experiment. This research was conducted by mixed method with triangulation data, in which the Virtual Chemistry Laboratory content was constructed using the Model of Educational Reconstruction and developed to enhanced students ability to predict the experiment results and analysed the cause of error, calculating the accuracy and precision with carefully in using chemicals. This research bring out a new and simple experiment design inside Virtual Chemistry Laboratory, and the implementation showed student’s transformation to executing important decision, extremely beware with accuracy, but still had low concern in precision. It enhancing students level of reflective thinking skills related to their prediction skills 1 until 2 stage This study recommends for different subject matter to provide more opportunities for students to expand another chemistry experiments.
{"title":"Virtual Chemistry Laboratory as Pre-Lab Experiences: Stimulating Student’s Prediction Skills","authors":"Y. Kurniawati","doi":"10.4108/eai.18-10-2018.2287210","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287210","url":null,"abstract":"The student’s prediction skills in chemistry experiments areimportant skills for pre-service chemistry students to stimulate students reflective thinking at each stage of chemistry experiments, qualitatively and quantitatively. A Virtual Chemistry Laboratory was designed to provide opportunities for students to practicing kinds of chemistry experiments everywhere, anytime, and repeatedly, before exercising the real experiment. This research was conducted by mixed method with triangulation data, in which the Virtual Chemistry Laboratory content was constructed using the Model of Educational Reconstruction and developed to enhanced students ability to predict the experiment results and analysed the cause of error, calculating the accuracy and precision with carefully in using chemicals. This research bring out a new and simple experiment design inside Virtual Chemistry Laboratory, and the implementation showed student’s transformation to executing important decision, extremely beware with accuracy, but still had low concern in precision. It enhancing students level of reflective thinking skills related to their prediction skills 1 until 2 stage This study recommends for different subject matter to provide more opportunities for students to expand another chemistry experiments.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128603262","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 : 1900-01-01DOI: 10.4108/eai.18-10-2018.2287308
T. Tampubolon, R. Juliani, Juniar Hutahaean
Ten years long eruption at Mt. Sinabung 2009 to 2018 generated a diverse surface environment, which is located in Sumatra Island, Indonesia. In fact, most of the eruption event probably being aware to vegetation changes and temperature changes during those eruptions shown in that period. Therefore, there was abundant data of satellite imagery to support the observation of stunning eruption one of the satellite imagery is Landsat 8 OLI. Field survey is also as evidence for fluctuated of volcanic activity during the Mt. Sinabung eruption by using position tracking, scenery taking, and temperature monitoring. Scope of observation is limited around 5 km and processed by using ArcGIS 10.3 and ENVI 4.7. In particular, results indicated that the intensity of Mt. Sinabung eruption increased every year, since 2009. According to temperature and vegetation information provided by Landsat 8 OLI shows an increase in temperature (by land surface temperature index or LST) simultaneously with a decrease in vegetation index (by Normalized Difference Vegetation Index or NDVI). In accordance with that information, this results confirm Mt. Sinabung erupted influences the environment stability.
{"title":"Utilization of Landsat Satellite Imagery to Observe Environmental Change at Sinabung Mountain Area","authors":"T. Tampubolon, R. Juliani, Juniar Hutahaean","doi":"10.4108/eai.18-10-2018.2287308","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287308","url":null,"abstract":"Ten years long eruption at Mt. Sinabung 2009 to 2018 generated a diverse surface environment, which is located in Sumatra Island, Indonesia. In fact, most of the eruption event probably being aware to vegetation changes and temperature changes during those eruptions shown in that period. Therefore, there was abundant data of satellite imagery to support the observation of stunning eruption one of the satellite imagery is Landsat 8 OLI. Field survey is also as evidence for fluctuated of volcanic activity during the Mt. Sinabung eruption by using position tracking, scenery taking, and temperature monitoring. Scope of observation is limited around 5 km and processed by using ArcGIS 10.3 and ENVI 4.7. In particular, results indicated that the intensity of Mt. Sinabung eruption increased every year, since 2009. According to temperature and vegetation information provided by Landsat 8 OLI shows an increase in temperature (by land surface temperature index or LST) simultaneously with a decrease in vegetation index (by Normalized Difference Vegetation Index or NDVI). In accordance with that information, this results confirm Mt. Sinabung erupted influences the environment stability.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121337810","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 : 1900-01-01DOI: 10.4108/eai.18-10-2018.2287410
Isda Pramuniati, Marice Marice, Wahyuni Sa’dah
. Listening learning (production orale) based on e-learning by utilizing the website www.marmiton.org includes recipes in French to train students' understanding in vocabulary mastery and listening skills. This learning media is taught in an audio-visual manner that contains two language skills, namely reading and listening. This learning media is one of the supporters of the teaching and learning process which is very varied. This study aims to (1) describe the steps in the application of audio-visual media on the www.marmiton.org website in learning the listening skills of French, and (2) describe the feasibility of the material and the development of audio-visual media material on the www.marmiton.org website in learning French listening skills, and (3) describing student learning outcomes using audio-visual media on the www.marmiton.org website in learning French listening skills. The method used in this study is a pre-experimental method with one shot case study research design. The sample of the study is consisted of 30 students of the French Education Program, in the Language and Arts Faculty, UNIMED. The data was obtained through observation during the learning process took place, showing that 75% of the students were very interested in using this learning strategy because they could clearly see the form of the ingredients accompanied by new terms and vocabulary in French-language recipes .
{"title":"The Use and Material Development of Audio-Visual Media on www.marmiton.org Website in French Listening Skill","authors":"Isda Pramuniati, Marice Marice, Wahyuni Sa’dah","doi":"10.4108/eai.18-10-2018.2287410","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287410","url":null,"abstract":". Listening learning (production orale) based on e-learning by utilizing the website www.marmiton.org includes recipes in French to train students' understanding in vocabulary mastery and listening skills. This learning media is taught in an audio-visual manner that contains two language skills, namely reading and listening. This learning media is one of the supporters of the teaching and learning process which is very varied. This study aims to (1) describe the steps in the application of audio-visual media on the www.marmiton.org website in learning the listening skills of French, and (2) describe the feasibility of the material and the development of audio-visual media material on the www.marmiton.org website in learning French listening skills, and (3) describing student learning outcomes using audio-visual media on the www.marmiton.org website in learning French listening skills. The method used in this study is a pre-experimental method with one shot case study research design. The sample of the study is consisted of 30 students of the French Education Program, in the Language and Arts Faculty, UNIMED. The data was obtained through observation during the learning process took place, showing that 75% of the students were very interested in using this learning strategy because they could clearly see the form of the ingredients accompanied by new terms and vocabulary in French-language recipes .","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126112947","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 : 1900-01-01DOI: 10.4108/eai.18-10-2018.2287298
Agustina . Tobing, R. Silaban, N. Nurfajriani
This study aimed to analyze the feasibility level of the VII grade junior high school integrated science practical guide book. This research was a descriptive analysis study conducted at State Junior High School 10 Medan.This research was limited to the result of feasibility of the practical guide book which is used in 3 schools.Samples of this study were 3 books consisting of 2 LKS books (Student Worksheets) and 1 book created by teacher. Data collection techniques were carried out using a BSNP (National Education Standard Board) questionnaire. This questionnaire is used to assess the feasibility of the guide book. The results of the study show that 1) aspect of feasibility the content in practical guidance integrated guided inquiry model and used school subject have an average of 4.15, 2)The aspect feasibility of language in practical guidance integrated guided inquiry model and used school subject average of 4.00, 3) The aspect feasibility of presentation in practical guidance integrated guided inquiry model and used school subject have an average of 4.06, 4) The aspect feasibility of graphing in practical guidance integrated guided inquiry model and used school subject have an average of 4.08.
{"title":"Analysis of Feasibility Level of Integrated Science Practical Guide Book Based on BSNP for Junior High School Grade VII","authors":"Agustina . Tobing, R. Silaban, N. Nurfajriani","doi":"10.4108/eai.18-10-2018.2287298","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287298","url":null,"abstract":"This study aimed to analyze the feasibility level of the VII grade junior high school integrated science practical guide book. This research was a descriptive analysis study conducted at State Junior High School 10 Medan.This research was limited to the result of feasibility of the practical guide book which is used in 3 schools.Samples of this study were 3 books consisting of 2 LKS books (Student Worksheets) and 1 book created by teacher. Data collection techniques were carried out using a BSNP (National Education Standard Board) questionnaire. This questionnaire is used to assess the feasibility of the guide book. The results of the study show that 1) aspect of feasibility the content in practical guidance integrated guided inquiry model and used school subject have an average of 4.15, 2)The aspect feasibility of language in practical guidance integrated guided inquiry model and used school subject average of 4.00, 3) The aspect feasibility of presentation in practical guidance integrated guided inquiry model and used school subject have an average of 4.06, 4) The aspect feasibility of graphing in practical guidance integrated guided inquiry model and used school subject have an average of 4.08.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114942992","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 : 1900-01-01DOI: 10.4108/eai.18-10-2018.2287343
Gulmah Sugiharti, Zurma Nilam
This research is an experimental research that is able to find out whether there are differences in students' chemistry learning outcomes that teach with Problem Based Learning model (PBL) and Discovery Learning (DL) using Real Media Lab. In my experiments I was taught by PBL model with real lab and experiment II class with DL model using original lab. Data analysis uses two-t test. Expectation 1 class has an average pre and post test score of 51.5 + 7.27 and 77.12 + 8.90 with an average gain of 0.55. The experimental class II has a pre-test average of 43.1 + 6.65 and a post-test of 58.25 + 7.73 with an average gain of 0.26. Result of t test at α = 0,05 obtained tcount = 10,08> ttable = 2,0021 hence alternative hypothesis accepted, and concluded there are difference of learning result which significant between student taught by PBL model and DL model that is equal to 26%.
{"title":"Differences in Chemical Learning Outcomes That are Teached with Problem Based Learning and Discovery Learning Using Lab Real Media on Subject of Solubility and Solubility Product","authors":"Gulmah Sugiharti, Zurma Nilam","doi":"10.4108/eai.18-10-2018.2287343","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287343","url":null,"abstract":"This research is an experimental research that is able to find out whether there are differences in students' chemistry learning outcomes that teach with Problem Based Learning model (PBL) and Discovery Learning (DL) using Real Media Lab. In my experiments I was taught by PBL model with real lab and experiment II class with DL model using original lab. Data analysis uses two-t test. Expectation 1 class has an average pre and post test score of 51.5 + 7.27 and 77.12 + 8.90 with an average gain of 0.55. The experimental class II has a pre-test average of 43.1 + 6.65 and a post-test of 58.25 + 7.73 with an average gain of 0.26. Result of t test at α = 0,05 obtained tcount = 10,08> ttable = 2,0021 hence alternative hypothesis accepted, and concluded there are difference of learning result which significant between student taught by PBL model and DL model that is equal to 26%.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122489716","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 : 1900-01-01DOI: 10.4108/eai.18-10-2018.2287367
A. Siregar, S. Gea, D. Barus, N. Panindia, Y. Sibarani, Y. A. Hutapea
The study on enhancing mechanical properties of natural rubber-based nanocomposites which was reinforced with nanofiller has been observed for many years. In this research, cellulose nanocrystals (CNCs), which was prepared by hydrolyzing cellulose from oil palm empty fruit bunches (OPEFB), were percolated with carbon nanotubes (CNTs) using ultrasonicator to obtain CNCs@CNTs nanohybrid and utilized as the filler. Natural rubber latex/CNCs@CNTs nanocomposites were fabricated via latex mild mixing and coagulated by sulphuric acid followed by hydraulic hot-press. The mechanical properties of natural rubber latex/CNCs@CNTs nanocomposites were characterized using the tensile testing machine to evaluate the efficiency of the filler reinforcing the nanocomposites. On the other hand, the morphology of nanocomposite was observed by Scanning Electron Microscope (SEM) and its swelling index (SI) was calculated using ASTM D3616. Tensile test showed a significant increase in tensile strength of nanocomposites with the optimum number of 0.428 MPa and was achieved by nanocomposite consisting 3 phr of filler. Moreover, the least number of SI was also belonged to 3 phr filler of nanocomposites, which is 8.5. Finally, the morphology of nanocomposites exhibited the filler taking a prominent role in improving the mechanical properties.
{"title":"Improvisation of Mechanical Properties on Natural Rubber Latex Nanocomposites with Additioning of Cellulose Nanocrystals (CNCs) Percolated by Carbon Nanotubes (CNTs) in Various Concentrations","authors":"A. Siregar, S. Gea, D. Barus, N. Panindia, Y. Sibarani, Y. A. Hutapea","doi":"10.4108/eai.18-10-2018.2287367","DOIUrl":"https://doi.org/10.4108/eai.18-10-2018.2287367","url":null,"abstract":"The study on enhancing mechanical properties of natural rubber-based nanocomposites which was reinforced with nanofiller has been observed for many years. In this research, cellulose nanocrystals (CNCs), which was prepared by hydrolyzing cellulose from oil palm empty fruit bunches (OPEFB), were percolated with carbon nanotubes (CNTs) using ultrasonicator to obtain CNCs@CNTs nanohybrid and utilized as the filler. Natural rubber latex/CNCs@CNTs nanocomposites were fabricated via latex mild mixing and coagulated by sulphuric acid followed by hydraulic hot-press. The mechanical properties of natural rubber latex/CNCs@CNTs nanocomposites were characterized using the tensile testing machine to evaluate the efficiency of the filler reinforcing the nanocomposites. On the other hand, the morphology of nanocomposite was observed by Scanning Electron Microscope (SEM) and its swelling index (SI) was calculated using ASTM D3616. Tensile test showed a significant increase in tensile strength of nanocomposites with the optimum number of 0.428 MPa and was achieved by nanocomposite consisting 3 phr of filler. Moreover, the least number of SI was also belonged to 3 phr filler of nanocomposites, which is 8.5. Finally, the morphology of nanocomposites exhibited the filler taking a prominent role in improving the mechanical properties.","PeriodicalId":240056,"journal":{"name":"Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121691167","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}
Proceedings of the Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia
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