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Majalah Ilmiah Matematika dan Statistika
ISSN 1411-6669 · Department of Mathematics FMIPA University of Jember · 68 artikel di indeks
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Artikel Jurnal
Simultaneous Model of Poverty and GRDP in Indonesia
This study is based on the increase in Gross Regional Domestic Product (GRDP) and the decrease in poverty rates in 2024. This indicates a relationship between the two variables. Previous studies have shown the influence of poverty rates on GRDP and vice versa, these relationships were generally…
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Performance of Holt-Winters exponential smoothing method in forecasting Indonesian inflation levels
Forecasting inflation data is an important part of economic decision making. Periodic updates are needed considering changes in external factors that affect the inflation rate. This study aims to examine the performance of the Holt-Winters Exponential Smoothing method in predicting the inflation…
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A Composite Index Measuring Agricultural Damage and Analyzing its Trends Based on Climate Factors
The climate in Indonesia is becoming more unpredictable and has caused serious damage to many important sectors, especially agriculture. Floods, droughts, and plant pests have affected agricultural land and created major risks for the future of agriculture in Indonesia. This study aims to examine…
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Extending Analytical Baselines in Fourth-Order Packer Models Through a Flexible Finite Difference and Ghost Point Approach
Rubber packers are important downhole tools used to isolate fluid zones and prevent leakage during oil and gas production. Understanding their deformation behavior is essential because the performance of the sealing system is strongly influenced by the expansion of the rubber element under pressure…
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A Comparative Study of Undersampling, K-Means Clustering, and Ensemble Learning for Class Imbalance Handling
The study aims to compare the performance of the Support Vector Machine (SVM) classification method under several approaches for handling imbalanced class data. The methods considered in this study include Underbagging, SMOTEBagging, Safe-Level SMOTEBagging, and K-Means clustering-based…
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GAMLSS application for modeling the level of open unemployment in East Java
This research analyzes the application of Generalized Additive Model for Location, Scale, and Shape (GAMLSS) using penalized spline smoothing and Rigby-Stasinopoulos (RS) algorithm for modeling open unemployment rate in East Java Province in 2022. Predictor variables in this research are labor…
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Forecasting electronic money trends in Indonesia using neural network models: A comparative analysis
Forecasting electronic money transaction values is essential for effective financial planning and decision-making in various industries. This study evaluates the performance of three neural network models, which are Extreme Learning Machines (ELM), Multilayer Perceptron (MLP), and Neural Network…
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Madiun City Labor Force Participation Rate (LFPR) forecast model with double exponential smoothing holt
The Labour Force Participation Rate (LFPR) is a percentage of the number of workers in the population of working age (+15 years). Madiun City which is one of the largest cities in East Java Province. However, LFPR of Madiun city only ranks 34 out of 39 regencies/cities in East Java. This situation…
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Chaotic outbreak in discrete epidemic model with vaccination and quarantine interventions and limited medical resources
The spread of infectious diseases can be analyzed dynamically using a discrete dynamic system. The characteristics of the infectious disease phenomenon are interesting to study as parameters considered in a dynamic system. Some of these include vaccination interventions, quarantine, or even an open…
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Regularisasi model pembelajaran mesin dengan regresi terpenalti pada data yang mengandung multikolinearitas (Studi kasus prediksi Indeks Pembangunan Manusia di 34 provinsi di Indonesia)
This research intends to model high-dimensional data that contains multicollinearity in four machine-learning algorithms: Random Forest, K-Nearest Neighbor, XGBoost, and Regression Tree. Previously, regularization was carried out with penalized ridge regression, least absolute shrinkage and…
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Optimizing banana production in aroma Lumajang business using goal programming method and sensitivity analysis
Lumajang regency, located in the East Java Province, Indonesia, is renowned for its extensive banana cultivation. Aroma Business, situated in Kalibendo Village, Pasirian District, Lumajang Regency, specializes in banana processing. The company faces challenges including suboptimal production…
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Penggerombolan provinsi di Indonesia berdasarkan instrumen akreditasi satuan pendidikan jenjang SMK menggunakan K-means dan average linkage
Improvement and updates need to be done in order to maintain the existence of a school. Accreditation is one of the references to assess the excellence of a school. There are several components used in the accreditation assessment included in the IASP, namely Graduate Quality, Learning Process…
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Pemodelan kasus tingkat kemiskinan di Indonesia periode 2015-2021 dengan model regresi panel terboboti geografis
Poverty is a major concern of the Indonesian government and the government's efforts to reduce poverty are a national development priority. Therefore, it is interesting to identify the factors that influence poverty in Indonesia. Considering a spatial perspective, Geographically Weighted Panel…
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Peramalan dan dekomposisi untuk mata uang kripto dengan model facebook prophet
Cryptocurrencies are becoming one of the hottest topics in Indonesia's society. One of those issues concerns investors who incur financial losses as a result of investing in crypto. The facebook Prophet model, one of the forecast models, can offer a solution to this problem. The Prophet model is…
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Fuzzy time series dalam meramalkan jumlah produksi karet di Sumatra Utara
Rubber (Hevea brasiliensis) belongs to the genus Heveadari familia Euphorbiaceae which is a tropical woody tree native to the amazon jungle. Rubber is one of the plantation crops that is very important for the economy in Indonesia. Rubber production in North Sumatra has increased every year. To…
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Penyelesaian khusus persamaan diferensial biasa ordo dua linier tak homogen dengan koefisien konstan untuk fungsi bagian demi bagian
Spring mechanical vibration motion system with a damped degree of freedom and influenced by external forces, is mathematically expressed as an ordinary differential equation of order of two linear constant coefficients that are not homogeneous. If an external force acts on a stationary system…
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Indeks Padmakar-Ivan dan indeks Randic pada graf non-koprima dari grup bilangan bulat modulo
Graph theory, introduced by the Swiss mathematician Leonhard Euler in 1736, has played a pivotal role in solving real-world problems since its inception, notably exemplified by Euler's solution to the Konigsberg Bridge problem. Its applications extend to various domains, including scheduling…
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Diagonalisasi matriks atas ring dengan metode pemfaktoran secara lengkap
Generally, discussion about diagonalization of matrices in linear algebra is a matrix over the field. This research presents the diagonalization of matrices over commutative rings. Previous studies have explained the diagonalization of the matrix over a commutative ring, but there are some…
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Hubungan antara latis distributif dan aljabar median
Let M be a non-empty set equipped by a ternary operation m:M×M×M→M. The set M is called a median algebra if (M,m) satisfies these properties (1) majority: m(a,a,b)=a, associativity: m(a,b,m(c,b,d) = m(m(a,b,c),b,d), and commutativity: m(a,b,c) = m(a,c,b) = m(b,a,c) for every a,b,c,d∈M. In this…
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Modeling factors affecting poverty in Nusa Tenggara using the multivariate adaptive regression spline (MARS) method
Poverty is still a fundamental problem in the economy of various regions or developing countries, including Indonesia. The Nusa Tenggara Islands are one of the regions in Central Indonesia, where East Nusa Tenggara Province is in 3rd place with 20.44%, and West Nusa Tenggara Province is in 8th…