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All Journal Jurnal Pembelajaran MIPA Pelita Eksakta Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Journal of Mathematics UNP Mathematical Journal of Modelling and Forecasting Diophantine Journal of Mathematics and Its Applications
Yusmet Rizal
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Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Mathematics Physics Other

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Peramalan Hasil Produksi Padi di Kabupaten Solok menggunakan Metode Triple Exponential Smothing Tipe Brown Kardinal, Ridho; Rizal, Yusmet
Journal of Mathematics UNP Vol 8, No 3 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i3.14331

Abstract

Rice is the main food crop which consumes almost the entire population in Solok Regency. The rise and fall of rice production in Solok Regency is caused by the increasingly limited area of rice fields which results in changing the function of paddy fields into settlements or housing. The purpose of this research is to find out the brown type triple exponential smoothing model and to predict rice production in Solok Regency in 2004-2021. Estimates of rice production for the next 5 years show a decline. The forecasting model is:. The result of forecasting rice production for 2004-2021 in tons are 314119,49, 289788,96, 261426,70, 229032,73 and 192607,04.
PREDIKSI HARGA EMAS MENGGUNAKAN METODE AVERAGE BASED FUZZY TIME SERIES Rizal, Yusmet; Ramadhani, Suci
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 5 No. 3 (2024): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v5i3.778

Abstract

This research aims to analyze and predict gold prices using the Average Based Fuzzy Time Series method. By utilizing historical data on daily gold prices from March 2034 to July 2024, this research identifies existing patterns and trends to produce accurate predictions. The method used Average Based Fuzzy Time Series (ABFTS) allows processing data with irregular fluctuations, thus providing more stable and reliable results. The analysis results show that the developed forecasting model has good accuracy, measured by the Mean Absolute Percentage Error (MAPE), which shows a low error rate. This research also identifies factors that influence gold prices, providing useful insights for investors in making investment decisions. Thus, this research makes a significant contribution to the field of commodity price forecasting, especially gold, and offers practical recommendations for investors and policy makers
Analisis Persediaan Bahan Baku Multi Item Usaha Kerupuk Kulit Alhamdulillah Menggunakan Metode Economic Order Quantity Cahyani, Vebby Afifah Cahyani; Rizal, Yusmet
Diophantine Journal of Mathematics and Its Applications Vol. 2 No. 1 (2023)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diophantine.v2i01.28208

Abstract

Controlling raw material stocks is a crucial aspect of effective inventory management for businesses. The company's objective is to maximise profits. To maximise earnings, the corporation must prudently maintain appropriate inventory levels in order to limit existing inventory expenses. Kerupuk Kulit Alhamdulillah is a small to medium-sized business in the food industry that manufactures skin crackers in various packaging sizes. This is an example of applied research. This study employs the Lilliefors normality test to assess if the data are normally distributed. According to the findings of calculations using the method Economic Order Quantity (EOQ), the entire cost of multi-item raw material inventory according to the Kerupuk Kulit Alhamdulillah is Rp 4,703,520.00, however according to the EOQ method, the total cost is Rp 2,093.00. Kerupuk Kulit Alhamdulillah Business can save Rp 2,694,427.00 by utilising the EOQ approach.
PENYELESAIAN PERSAMAAN NON LINEAR MENGGUNAKAN METODE ITERASI TIGA LANGKAH Huang, Nafisha Hurinia; Rizal, Yusmet
Journal of Mathematics UNP Vol 10, No 1 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i1.17052

Abstract

The Three-Step Iterative Method is a multistep approach designed to determine the roots of complex non-linear equations. Developed using Taylor Series, Quadratic Equations, and Hermite Interpolation, this method provides an alternative for solving complicated equations numerically and analytically. This study aims to examine the formulation of the method, design an algorithm in a flowchart, and analyze its convergence order. The research adopts a literature review methodology by conducting an in-depth analysis of relevant references. The algorithm's implementation is tested through computer programming to evaluate its numerical effectiveness. The results demonstrate that the method achieves high-order convergence, enabling faster solutions with minimal error. In conclusion, the Three-Step Iterative Method is an efficient and accurate solution for resolving complex non-linear equations.
Application of the Inflection Point in the Evaluation of the Halley and Newton-Raphson Techniques for Finding the Root of Non-Linear Equations Apriano, Laode; Rizal, Yusmet
Mathematical Journal of Modelling and Forecasting Vol. 2 No. 1 (2024): June 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/mjmf.v2i1.23

Abstract

Numeric Method is one of the methods used to solve nonlinear equation roots. Many methods can be used, both open methods and closed methods. In this case, the method used is closed, namely the Newton-Raphson Method and Halley Method. The research aims to find out the comparison result between the Newton-Raphson Method and the Halley Method. The research used a literature method from a book, journal, and any other literature, where it connected with the topic. The steps used are formulation problem, finding and collecting information, describing and explaining the information, analysis, and conclusion of the result. The conclusion can be explained with a table of data and explanations Based on data analysis, it can be stated that the Halley Method is faster toward convergence compared to the Newton-Raphson Method based on the first case or second case.
Co-Authors Annisa Rahmawati Apriano, Laode Cahyani, Vebby Afifah Cahyani Cindi Meidisia Defri Ahmad Dina Fitria Esi Esi Helma Helma Huang, Nafisha Hurinia Intan Ayu Ramadhani Isra Nurmai Yenti Kardinal, Ridho Manik, Febry Regina Maulana, Heru MIFTAHUL JANNAH Muhammad Subhan Putri, Mutiara Ayu Rahmatullah, Saffa Saddam Al Aziz Suci Ramadhani, Suci Suherman Suherman Yunita, Hazarin Morela