Pub Date : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.076
Iron Ujulu, M. Umar, Mursalin, A. H. Odja
A research has been conducted to describe the students' initial problem-solving abilities through five stages of problem-solving. This study was aim to describe the profile of students' problem-solving in overcoming sound wave concepts in terms of academic ability, where the research subjects were grade XI students of SMA Negeri 6 Gorontalo Utara. It was a part of the research development of social media-aided named blended learning models to improve problem-solving skills. It used qualitative descriptive study it shows percentage of problem-solving ability test completion stages is in the category of students with academic abilities, with an average score of 83.75%, after that students are in the medium and low categories. It showed that there are some who are able to carry out the stages of problem-solving in completing problem-solving tests but have not been able to describe it properly. Finally, the maximum score was difficult to get either in students with high, medium and low academic
一项研究通过问题解决的五个阶段来描述学生的初始问题解决能力。摘要本研究旨在探讨学生在克服声波概念方面的学术能力问题，研究对象为SMA Negeri 6 Gorontalo Utara小学11年级学生。这是社交媒体辅助命名为混合学习模式的研究发展的一部分，以提高解决问题的能力。采用定性描述性研究表明，学生解决问题能力测试完成阶段的百分比处于具有学术能力的学生类别，平均得分为83.75%，之后学生处于中低类别。它表明，有些人在完成问题解决测试时能够进行问题解决的各个阶段，但却不能正确地描述它。最后，无论是高、中、低年级的学生，都很难得到最高分
{"title":"Students’ Problem-Solving Profile in Overcoming Sound Wave Concepts Based Students’ Academic Abilities on Online Class","authors":"Iron Ujulu, M. Umar, Mursalin, A. H. Odja","doi":"10.2991/ASSEHR.K.210305.076","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.076","url":null,"abstract":"A research has been conducted to describe the students' initial problem-solving abilities through five stages of problem-solving. This study was aim to describe the profile of students' problem-solving in overcoming sound wave concepts in terms of academic ability, where the research subjects were grade XI students of SMA Negeri 6 Gorontalo Utara. It was a part of the research development of social media-aided named blended learning models to improve problem-solving skills. It used qualitative descriptive study it shows percentage of problem-solving ability test completion stages is in the category of students with academic abilities, with an average score of 83.75%, after that students are in the medium and low categories. It showed that there are some who are able to carry out the stages of problem-solving in completing problem-solving tests but have not been able to describe it properly. Finally, the maximum score was difficult to get either in students with high, medium and low academic","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122000224","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.090
Yashinta Putri Sekarini, Endang Tri Adiningsih, Zulfa Lutfi Anisa, B. Setiaji
This study is aimed to produce a Mechanics Problem Based Learning module, that is feasible to use in physics learning on Mechanics topic. The research method uses Research and Development (RnD). The instruments are questionnaires of module feasibility test and questions validity test. The validators are a construct validator from physics education lecturer and five content validators from pure physics lecturers. All validators are chosen from three state universities in Indonesia. The questions in this module fulfill the analytical thinking skill indicators based on Bloom's Taxonomy. The result of the module feasibility test is analyzed by using the Ideal Evaluation Criteria in Scale 5. Meanwhile, the result of the questions validity test is analyzed by using content validation ratio (CVR). Due to the result of the study, the Mechanics Problem Based Learning module is generally feasible to be used in physics learning on Mechanics topic. Owing to the general score of 4.06 out of 5.00 acquired, the module is included in the feasible category. Whereas the set of questions in the module is valid because it is included very useful category. All sub-indicators obtain CVR score of 1 as a perfect score. The module is revised based on validators’ comments and adapted to the theory. Therefore, both the materials and the set of questions could be used to measure students’ analytical thinking skill in physics learning on Mechanics topic.
{"title":"A New Alternative to Measure Students’ Analytical Thinking Skill: A Validity Test for Mechanics Problem Based Learning Module","authors":"Yashinta Putri Sekarini, Endang Tri Adiningsih, Zulfa Lutfi Anisa, B. Setiaji","doi":"10.2991/ASSEHR.K.210305.090","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.090","url":null,"abstract":"This study is aimed to produce a Mechanics Problem Based Learning module, that is feasible to use in physics learning on Mechanics topic. The research method uses Research and Development (RnD). The instruments are questionnaires of module feasibility test and questions validity test. The validators are a construct validator from physics education lecturer and five content validators from pure physics lecturers. All validators are chosen from three state universities in Indonesia. The questions in this module fulfill the analytical thinking skill indicators based on Bloom's Taxonomy. The result of the module feasibility test is analyzed by using the Ideal Evaluation Criteria in Scale 5. Meanwhile, the result of the questions validity test is analyzed by using content validation ratio (CVR). Due to the result of the study, the Mechanics Problem Based Learning module is generally feasible to be used in physics learning on Mechanics topic. Owing to the general score of 4.06 out of 5.00 acquired, the module is included in the feasible category. Whereas the set of questions in the module is valid because it is included very useful category. All sub-indicators obtain CVR score of 1 as a perfect score. The module is revised based on validators’ comments and adapted to the theory. Therefore, both the materials and the set of questions could be used to measure students’ analytical thinking skill in physics learning on Mechanics topic.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117231858","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.066
A. Sari, Ariswan
This study aims to produce an integrated physics learning e-module with Pancasila character values in work and energy subjects that is feasible to use. The type of research used is research and development. The development procedure is guided by the 4-D model. Research subjects consisted of material experts, media experts, physics teachers, peer reviewers, and 30 students of class X MIPA SMA N 1 Gading Rejo. The data collection technique used observation techniques, literature study techniques, documentation, and questionnaire techniques. The research instruments used include observation sheets, product feasibility assessment sheets, and student response questionnaire. Data collected were analyzed using descriptive analysis. The results showed that the integrated physics learning e-module with Pancasila character values in work and energy subjects was feasible for use with the “Very Good” category based on the assessment of material experts, media experts, physics teachers, peer reviewers, and student responses. Based on these findings, the teacher can use this e-module as a reference for student learning resources in the learning process both inside and outside the classroom because the e-module has been tested for its feasibility.
本研究的目的是制作一个具有潘卡西拉特征值的综合物理学习电子模块，用于工作和能源科目。所使用的研究类型是研究和开发。开发过程以4-D模型为指导。研究对象包括材料专家、媒体专家、物理教师、同行评议人员和30名MIPA SMA N 1 Gading Rejo班学生。数据收集技术采用观察技术、文献研究技术、文献资料和问卷调查技术。研究工具包括观察表、产品可行性评估表和学生问卷。收集的数据采用描述性分析进行分析。结果表明，基于材料专家、媒体专家、物理教师、同行评议员和学生的评价，具有潘卡西拉特征值的综合物理学习电子模块在工作和能源科目中具有“非常好”类别的可行性。基于这些发现，教师可以在课堂内外的学习过程中使用该电子模块作为学生学习资源的参考，因为该电子模块已经经过了可行性测试。
{"title":"Development of Integrated Physics Learning E-Module with Pancasila Character Values in Work and Energy Subjects","authors":"A. Sari, Ariswan","doi":"10.2991/ASSEHR.K.210305.066","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.066","url":null,"abstract":"This study aims to produce an integrated physics learning e-module with Pancasila character values in work and energy subjects that is feasible to use. The type of research used is research and development. The development procedure is guided by the 4-D model. Research subjects consisted of material experts, media experts, physics teachers, peer reviewers, and 30 students of class X MIPA SMA N 1 Gading Rejo. The data collection technique used observation techniques, literature study techniques, documentation, and questionnaire techniques. The research instruments used include observation sheets, product feasibility assessment sheets, and student response questionnaire. Data collected were analyzed using descriptive analysis. The results showed that the integrated physics learning e-module with Pancasila character values in work and energy subjects was feasible for use with the “Very Good” category based on the assessment of material experts, media experts, physics teachers, peer reviewers, and student responses. Based on these findings, the teacher can use this e-module as a reference for student learning resources in the learning process both inside and outside the classroom because the e-module has been tested for its feasibility.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127475541","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.099
S. Masfuah, F. Fakhriyah, I. Wilujeng, D. Rosana
This research aims to describe the content validity of scientific literacy-based diagnostic assessment. This research is a part of a research and development study that consists of a preliminary study, development, and validation stages. In this validation stage, 7 experts validated the developed instruments. The diagnostic assessment consisted of a four-tier diagnostic test and a self-assessment to identify the cause of student misconception. The experts consisted of physics concept experts, biology concept experts, science learning experts, and evaluation experts. The validations showed that the diagnostic test question validity was 94.83 with a very valid category. The self-assessment dealing with student misconception because identification had an average score of 92.41 with a very valid category. Based on the data analysis, it could be concluded that the instrument was valid and could be used to measure the students' misconceptions.
{"title":"The Content Validity of Scientific Literacy-Based Diagnostic Assessment","authors":"S. Masfuah, F. Fakhriyah, I. Wilujeng, D. Rosana","doi":"10.2991/ASSEHR.K.210305.099","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.099","url":null,"abstract":"This research aims to describe the content validity of scientific literacy-based diagnostic assessment. This research is a part of a research and development study that consists of a preliminary study, development, and validation stages. In this validation stage, 7 experts validated the developed instruments. The diagnostic assessment consisted of a four-tier diagnostic test and a self-assessment to identify the cause of student misconception. The experts consisted of physics concept experts, biology concept experts, science learning experts, and evaluation experts. The validations showed that the diagnostic test question validity was 94.83 with a very valid category. The self-assessment dealing with student misconception because identification had an average score of 92.41 with a very valid category. Based on the data analysis, it could be concluded that the instrument was valid and could be used to measure the students' misconceptions.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128924258","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.064
A. E. Damayanti, H. Kuswanto
This study aims to determine the feasibility of android-based marbles game comics using the group investigation model in learning physics. This study uses a 4-D development model (Define, Design, Develop, and Disseminate). The research data were obtained from the results of the product feasibility assessment by material experts and media experts (1 expert lecturer, 2 physics teacher, and 4 peer reviewers), as well as student response questionnaires. The results of the assessment based on material and media experts are in the very good category. Assessment of students' responses to comics developed on impulse momentum material with good categories. In other words, the developed comics are suitable for use in physics learning on impulse momentum material. The characteristics of the comics that were developed were using the group investigation model and integrated indigenous (marble games)..
{"title":"Developing Android-Based Marbles Game Comics Using Group Investigation Model in Physics Learning","authors":"A. E. Damayanti, H. Kuswanto","doi":"10.2991/ASSEHR.K.210305.064","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.064","url":null,"abstract":"This study aims to determine the feasibility of android-based marbles game comics using the group investigation model in learning physics. This study uses a 4-D development model (Define, Design, Develop, and Disseminate). The research data were obtained from the results of the product feasibility assessment by material experts and media experts (1 expert lecturer, 2 physics teacher, and 4 peer reviewers), as well as student response questionnaires. The results of the assessment based on material and media experts are in the very good category. Assessment of students' responses to comics developed on impulse momentum material with good categories. In other words, the developed comics are suitable for use in physics learning on impulse momentum material. The characteristics of the comics that were developed were using the group investigation model and integrated indigenous (marble games)..","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128869970","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.023
A. Awaluddin, Okrida Sonia, Muhdarina, A. Linggawati, S. S. Siregar
Palm oil mill effluent (POME) has an adverse effect on the environment due to its high toxicity, low pH, and high chemical and biological oxygen demand. The degradation using Fenton processes is considered as an attractive and sustainable way for the treatment of POME. In this study, as-synthesized birnessite-type manganese oxide was used as the Fenton catalyst for the treatment of POME. This oxide is a typical manganese oxide with an octahedral layered structured and was synthesized from the reduction of MnO4 ̅ using simple sugar (glucose) as a reducing agent by a solvent-free method. The characterization of the oxide was carried out using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), and Surface Area Analyzer (SAA). The characterization results indicated the birnessite-type manganese oxide with a well-crystalline structure, irregular shapes of morphology, and surface area of 4.180 m/g. The degradation studies revealed that H2O2 concentration plays a key role in the COD removal of the POME. The maximum reduction in COD removal was 62% in 45 minutes of reaction with the catalyst concentration of 400mg/L and 10 ml of H2O2.
{"title":"Preliminary Study on COD Removal on the Treatment of Palm Oil Mill Effluent (POME) Using Birnessite-Type Manganese Oxide via a Solvent-Free Method","authors":"A. Awaluddin, Okrida Sonia, Muhdarina, A. Linggawati, S. S. Siregar","doi":"10.2991/ASSEHR.K.210305.023","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.023","url":null,"abstract":"Palm oil mill effluent (POME) has an adverse effect on the environment due to its high toxicity, low pH, and high chemical and biological oxygen demand. The degradation using Fenton processes is considered as an attractive and sustainable way for the treatment of POME. In this study, as-synthesized birnessite-type manganese oxide was used as the Fenton catalyst for the treatment of POME. This oxide is a typical manganese oxide with an octahedral layered structured and was synthesized from the reduction of MnO4 ̅ using simple sugar (glucose) as a reducing agent by a solvent-free method. The characterization of the oxide was carried out using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), and Surface Area Analyzer (SAA). The characterization results indicated the birnessite-type manganese oxide with a well-crystalline structure, irregular shapes of morphology, and surface area of 4.180 m/g. The degradation studies revealed that H2O2 concentration plays a key role in the COD removal of the POME. The maximum reduction in COD removal was 62% in 45 minutes of reaction with the catalyst concentration of 400mg/L and 10 ml of H2O2.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126582398","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.041
Hermansah, D. Rosadi, Abdurakhman, Herni Utami, G. Darmawan
This research proposes the multi-output Nonlinear Autoregressive Neural Network (NARNN) method to forecast multivariate time series data containing the input layer, one hidden layer, and the output layer. The multi-output NARNN method is performed by applying the logistic activation function and the resilient backpropagation learning algorithm. The stage of determining the input variable is chosen based on the number of data frequencies. The number of neurons in the hidden layer is half of the number of input variables. Simulation and empirical studies are conducted to test whether the proposed method works well for multivariate time series data forecasting. The simulation results show that the best performance is the simulation data generated from the MESTAR nonlinear model. The simulation study results are as expected. Empirical studies on Indonesia’s inflation and Bank Indonesia interest rate data show that the multioutput NARNN method provides better forecasting accuracy than the VAR, VMA, and VARMA methods with a total MSE value of 0.054655 and a total MAPE of 0.026853 in the testing data.
{"title":"Multivariate Time Series Data Forecasting Using Multi-Output NARNN Model","authors":"Hermansah, D. Rosadi, Abdurakhman, Herni Utami, G. Darmawan","doi":"10.2991/ASSEHR.K.210305.041","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.041","url":null,"abstract":"This research proposes the multi-output Nonlinear Autoregressive Neural Network (NARNN) method to forecast multivariate time series data containing the input layer, one hidden layer, and the output layer. The multi-output NARNN method is performed by applying the logistic activation function and the resilient backpropagation learning algorithm. The stage of determining the input variable is chosen based on the number of data frequencies. The number of neurons in the hidden layer is half of the number of input variables. Simulation and empirical studies are conducted to test whether the proposed method works well for multivariate time series data forecasting. The simulation results show that the best performance is the simulation data generated from the MESTAR nonlinear model. The simulation study results are as expected. Empirical studies on Indonesia’s inflation and Bank Indonesia interest rate data show that the multioutput NARNN method provides better forecasting accuracy than the VAR, VMA, and VARMA methods with a total MSE value of 0.054655 and a total MAPE of 0.026853 in the testing data.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127607171","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.030
N. Awaliah, J. Ikhsan
This study aimed to investigate the effect of problem-learning on student’s metacognitive abilities and science process skills. Quasi-experimental with the posttest only design was used in this study. There were two classes namely experimental and control class. Experimental class applied problem-based learning, while the control class applied a scientific approach. The sample consisted of 62 students grade XI which was determined by simple random sampling. Data collection techniques in this study were posttest and observation. The instrument used in this study was a metacognitive ability posttest and a science process skills observation sheet. Data analysis used the Manova test by looking at the Hotteling’s Trace value. The results showed that there is a difference in metacognitive ability and science process skills between the experimental and control class. The difference of student’s metacognitive ability and science process skills on acid-base topic for the experimental class was higher than the control class. This study suggests that problem-based learning should be always applied to school in order to improve the student’s metacognitive ability and science process skills.
{"title":"Effect of Problem Based Learning on Student’s Metacognitive Ability and Science Process Skills","authors":"N. Awaliah, J. Ikhsan","doi":"10.2991/ASSEHR.K.210305.030","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.030","url":null,"abstract":"This study aimed to investigate the effect of problem-learning on student’s metacognitive abilities and science process skills. Quasi-experimental with the posttest only design was used in this study. There were two classes namely experimental and control class. Experimental class applied problem-based learning, while the control class applied a scientific approach. The sample consisted of 62 students grade XI which was determined by simple random sampling. Data collection techniques in this study were posttest and observation. The instrument used in this study was a metacognitive ability posttest and a science process skills observation sheet. Data analysis used the Manova test by looking at the Hotteling’s Trace value. The results showed that there is a difference in metacognitive ability and science process skills between the experimental and control class. The difference of student’s metacognitive ability and science process skills on acid-base topic for the experimental class was higher than the control class. This study suggests that problem-based learning should be always applied to school in order to improve the student’s metacognitive ability and science process skills.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133954755","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.038
D. Lestari, A. Abadi, Atmini Dhorurri, A. I. Tarigan, Elin Herlinawati
Food or nutrient intake is required to increase human resources. However, there are several problems that arise such as difficulties in preparing a nutritious menu for toddlers and lack of public understanding of nutritional fulfillment despite governmental efforts. Apparently, good quality nutrient is not always costly. Nutritionists often use the material exchange method in calculating the amount of nutrients contained in food as recommended in the standard menu for a toddler. However, this method can cause deviations above or below the expected amount of nutrition. The problem is a multi-objective one because it involves many goals to optimize simultaneously. The targets in preparing this menu are to meet the number of calories and nutritional content and to minimize the expenses. One model for solving this multiobjective problem is goal programming. This model aims to minimize deviations of calorie and nutrient content at optimal costs. The study resulted in the model and solution minimizing the total deviation from the target in accordance with the nutritional requirements set for toddlers.
{"title":"Optimization of Nutritional-Menu Planning for Toddlers by Goal Programming Model","authors":"D. Lestari, A. Abadi, Atmini Dhorurri, A. I. Tarigan, Elin Herlinawati","doi":"10.2991/ASSEHR.K.210305.038","DOIUrl":"https://doi.org/10.2991/ASSEHR.K.210305.038","url":null,"abstract":"Food or nutrient intake is required to increase human resources. However, there are several problems that arise such as difficulties in preparing a nutritious menu for toddlers and lack of public understanding of nutritional fulfillment despite governmental efforts. Apparently, good quality nutrient is not always costly. Nutritionists often use the material exchange method in calculating the amount of nutrients contained in food as recommended in the standard menu for a toddler. However, this method can cause deviations above or below the expected amount of nutrition. The problem is a multi-objective one because it involves many goals to optimize simultaneously. The targets in preparing this menu are to meet the number of calories and nutritional content and to minimize the expenses. One model for solving this multiobjective problem is goal programming. This model aims to minimize deviations of calorie and nutrient content at optimal costs. The study resulted in the model and solution minimizing the total deviation from the target in accordance with the nutritional requirements set for toddlers.","PeriodicalId":378773,"journal":{"name":"Proceedings of the 7th International Conference on Research, Implementation, and Education of Mathematics and Sciences (ICRIEMS 2020)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133888870","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 : 2021-03-08DOI: 10.2991/ASSEHR.K.210305.033
N. Fitriyana, A. Wiyarsi, H. Pratomo, Marfuatun, Annisa Krisdiyanti, Wahnutia Adilaregina
A good knowledge about Science, Technology, Engineering, and Mathematics (STEM) integration is essential for chemistry teachers before they are implementing a successful chemistry learning using STEM approach. This paper reported in-service chemistry teachers’ prior knowledge in integrating STEM in high school chemistry learning. A descriptive study was adopted in this research. A number of 82 in-service chemistry teachers who teach in senior high schools in Yogyakarta were established as the research sample. Research sample was drawn from Sleman and Bantul Regency, Yogyakarta, Indonesia through saturated sampling. The initial knowledge about STEM of in-service chemistry teachers were captured using STEM Knowledge Questionnaire (STEMKQ) consisting of 7 open-ended questions. The in-service chemistry teachers’ response toward this STEM-KQ were analysed following qualitative descriptive method using content analysis with interpretative coding. The findings of this study revealed that in-service chemistry teachers have understand the basic concept of STEM, still it needs to be enhanced. Most of in-service chemistry teachers have known the definition and position of STEM. However, they still have a lack knowledge about the example of STEM implementation in the chemistry lesson. Therefore, the in-service chemistry teachers need to follow workshop that provide guidance on how to implement STEM approach in chemistry learning. Thus, through this activity, the in-service chemistry teachers develop their skills in preparing STEM learning that implied on their readiness in integrating STEM in the chemistry learning activities.
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