Poverty is an economic problem faced by all countries in the world, including Indonesia. Poverty ... more Poverty is an economic problem faced by all countries in the world, including Indonesia. Poverty is seen as the inability of a person from an economic standpoint to meet basic food and non-food needs as measured from the expenditure side. East Java Province is used as the object of research because this province has the highest economic growth in Java Island after DKI Jakarta province in the last 5 years. However, East Java is also included in the province with the highest number of poor people on the island of Java. Several independent variables that are thought to influence the percentage of poverty in East Java are the Open Unemployment Rate (TPT), Life Expectancy Rate (AHH), Average Years of Schooling (RLS), Population Density, and GRDP Rate. Sources of research data come from the East Java BPS website and East Java Open Data. Data analysis was performed using a semiparametric regression approach. The results of the analysis obtained good performance values, namely the MSE value...
The aim of this study is to find the controlled factors affecting the mass density of the combine... more The aim of this study is to find the controlled factors affecting the mass density of the combined Al2O3/Cu. All experiments were carried out using powder metallurgy. Experiments were carried out with four controllable powder processing parameters, namely milling time, compaction pressure, sintering temperature, and holding time. The L18 mixed-level Taguchi Orthogonal Array was used for experimental because it is the basis for the analysis of the Taguchi method. In this research, statistical analysis is carried out using GRA with PCA and Quality Loss Function. The result was the best model based on the Quality Loss Function, because the method has the biggest determination coefficient value is 99,97% where the results is better than GRA with PCA. From the main effect table study, the optimal combination of parameters for response: mass density and hardness are A2B3C3D2 powder metallurgical process parameters, namely milling time of 360 minutes, compacting powder of 200 MPa, sinteri...
INTERNATIONAL CONFERENCE ON MATHEMATICS, COMPUTATIONAL SCIENCES AND STATISTICS 2020, 2021
Shallots are one of the leading commodities that strengthen national food security. From 2013 to ... more Shallots are one of the leading commodities that strengthen national food security. From 2013 to 2018 the development of shallots production had increased. Except in 2015 the production of shallots decreased by 0.39 percent compared to 2014. Prediction of shallots prices is needed in order to maintain price stability for supporting food security, economic stability, and trade. In predicting the price of shallots commodities, statistical modeling is carried out using parametric and nonparametric time series approaches. However, in this research the parametric approach did not meet the assumption of white noise. Therefore, the nonparametric approach of kernel estimator and Fourier series estimator was used with correlated error. Nonparametric approach is used because it has a flexible form and alternative solutions if the parametric approach does not meet the assumptions. The result was the best model to predict of shallots prices in Indonesia was modeled based on the nonparametric approaches with kernel estimator. The model met goodness criteria like the small MSE value is 757.7224 and the big determination coefficient is 99.95%. The goodness criteria for kernel estimator is better than Fourier series estimator. The kernel estimator has good performance to predict the price of shallots with small MAPE value is 1.088%.
Environment is one of Indonesia problems that should be solved. Environmental conditions have imp... more Environment is one of Indonesia problems that should be solved. Environmental conditions have impaction the quality health of human resource from a country. The Ministry of Environment and Forestry stated that the number of garbage stacks in Indonesia has reached 65.2 million tons per year. This condition has impact for health and economic aspects. The government has made regulations to overcome the garbage problem. However, the completion of waste cannot be finished if only relies on the performance of government. Society participation is also needed, so, that environmental conditions will get better. “Trashmart” is an innovation in waste management that starts from the idea of utilizing economically valuable waste, so that it can reduce the amount of garbage piles. This concept invites participation from the society to participate in sorting and grouping waste. Beside an idea about “Trashmart” that provide innovative solutions to reduce waste piles, there search describes the publ...
This study describes a new idea about comparing two new estimations in nonparametric regression f... more This study describes a new idea about comparing two new estimations in nonparametric regression for multiresponse cases or simultaneously model based on Fourier series and kernel estimators enabling the prediction of Indonesian strategic commodity prices during the COVID-19 pandemic. Based on the National Strategic Food Price Information Center in Indonesia, there are 10 strategic commodities in the agriculture, livestock, fishery, and horticultural sectors, which have had the biggest endowment to secure food supplies and the formation of inflation figures in Indonesia. These commodities include rice, chicken meat, beef, chicken, egg, onion, garlic, chili, cayenne, cooking oil, and sugar. Using the goodness estimator of criteria in nonparametric regression, such as the smaller Generalized Cross-Validation, the smaller Mean Square Error, and the larger determination coefficient (R2), the result of this study is Fourier series estimator to predict the prices of 10 food commodities, si...
Poverty is an economic problem faced by all countries in the world, including Indonesia. Poverty ... more Poverty is an economic problem faced by all countries in the world, including Indonesia. Poverty is seen as the inability of a person from an economic standpoint to meet basic food and non-food needs as measured from the expenditure side. East Java Province is used as the object of research because this province has the highest economic growth in Java Island after DKI Jakarta province in the last 5 years. However, East Java is also included in the province with the highest number of poor people on the island of Java. Several independent variables that are thought to influence the percentage of poverty in East Java are the Open Unemployment Rate (TPT), Life Expectancy Rate (AHH), Average Years of Schooling (RLS), Population Density, and GRDP Rate. Sources of research data come from the East Java BPS website and East Java Open Data. Data analysis was performed using a semiparametric regression approach. The results of the analysis obtained good performance values, namely the MSE value...
The aim of this study is to find the controlled factors affecting the mass density of the combine... more The aim of this study is to find the controlled factors affecting the mass density of the combined Al2O3/Cu. All experiments were carried out using powder metallurgy. Experiments were carried out with four controllable powder processing parameters, namely milling time, compaction pressure, sintering temperature, and holding time. The L18 mixed-level Taguchi Orthogonal Array was used for experimental because it is the basis for the analysis of the Taguchi method. In this research, statistical analysis is carried out using GRA with PCA and Quality Loss Function. The result was the best model based on the Quality Loss Function, because the method has the biggest determination coefficient value is 99,97% where the results is better than GRA with PCA. From the main effect table study, the optimal combination of parameters for response: mass density and hardness are A2B3C3D2 powder metallurgical process parameters, namely milling time of 360 minutes, compacting powder of 200 MPa, sinteri...
INTERNATIONAL CONFERENCE ON MATHEMATICS, COMPUTATIONAL SCIENCES AND STATISTICS 2020, 2021
Shallots are one of the leading commodities that strengthen national food security. From 2013 to ... more Shallots are one of the leading commodities that strengthen national food security. From 2013 to 2018 the development of shallots production had increased. Except in 2015 the production of shallots decreased by 0.39 percent compared to 2014. Prediction of shallots prices is needed in order to maintain price stability for supporting food security, economic stability, and trade. In predicting the price of shallots commodities, statistical modeling is carried out using parametric and nonparametric time series approaches. However, in this research the parametric approach did not meet the assumption of white noise. Therefore, the nonparametric approach of kernel estimator and Fourier series estimator was used with correlated error. Nonparametric approach is used because it has a flexible form and alternative solutions if the parametric approach does not meet the assumptions. The result was the best model to predict of shallots prices in Indonesia was modeled based on the nonparametric approaches with kernel estimator. The model met goodness criteria like the small MSE value is 757.7224 and the big determination coefficient is 99.95%. The goodness criteria for kernel estimator is better than Fourier series estimator. The kernel estimator has good performance to predict the price of shallots with small MAPE value is 1.088%.
Environment is one of Indonesia problems that should be solved. Environmental conditions have imp... more Environment is one of Indonesia problems that should be solved. Environmental conditions have impaction the quality health of human resource from a country. The Ministry of Environment and Forestry stated that the number of garbage stacks in Indonesia has reached 65.2 million tons per year. This condition has impact for health and economic aspects. The government has made regulations to overcome the garbage problem. However, the completion of waste cannot be finished if only relies on the performance of government. Society participation is also needed, so, that environmental conditions will get better. “Trashmart” is an innovation in waste management that starts from the idea of utilizing economically valuable waste, so that it can reduce the amount of garbage piles. This concept invites participation from the society to participate in sorting and grouping waste. Beside an idea about “Trashmart” that provide innovative solutions to reduce waste piles, there search describes the publ...
This study describes a new idea about comparing two new estimations in nonparametric regression f... more This study describes a new idea about comparing two new estimations in nonparametric regression for multiresponse cases or simultaneously model based on Fourier series and kernel estimators enabling the prediction of Indonesian strategic commodity prices during the COVID-19 pandemic. Based on the National Strategic Food Price Information Center in Indonesia, there are 10 strategic commodities in the agriculture, livestock, fishery, and horticultural sectors, which have had the biggest endowment to secure food supplies and the formation of inflation figures in Indonesia. These commodities include rice, chicken meat, beef, chicken, egg, onion, garlic, chili, cayenne, cooking oil, and sugar. Using the goodness estimator of criteria in nonparametric regression, such as the smaller Generalized Cross-Validation, the smaller Mean Square Error, and the larger determination coefficient (R2), the result of this study is Fourier series estimator to predict the prices of 10 food commodities, si...
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