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Journal of Mathematics UNP
Published by Universitas Negeri Padang
ISSN : 23551658     EISSN : 28073460     DOI : http://dx.doi.org/10.24036/unpjomath.v7i3.12564
Core Subject : Science, Education,
Computer Science & IT Decision Sciences, Operations Research & Management Mathematics
Journal of Mathematics UNP is a journal to publish article from student researches in UNP Mathematics study program, and we also kindly accept other article from outside of our study program related to Mathematics: consists of publication in Algebra, Analysis, Combinatoric, Geometry, Differential Equations, Graph and/or Mixed Mathematics Applications: consists of publication in Application of Differential Equations, Mathematics Modelling, Mathematics Physics, Mathematics Biology, Financial Mathematics, Application of Graph and Combinatorics, Optimal Control, Operation Research, and/ or Mixed Statistics: consists of publication on Development and/ or Application of statistics in various aspects.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 404 Documents
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Analisis Kojoin Full Profile Dalam Pemilihan Kerudung untuk Mahasiswi Departemen Matematika Universitas Negeri Padang Pertiwi, Monica; Murni, Dewi
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.v8i3.14306

Abstract

The veil is a kind of scarf that covers most of the top of a woman's head. The veiled order is an obligation and obedience to Allah and His Messenger. Now there are many types of headscarves such as rectangular or pashmina headscarves, making female students have to be selective in choosing a headscarf according to their needs but still follow the existing trends. This research aims to the preferred combination of UNP Mathematics Department students in choosing a headscarf. This study showed that the combination that students liked the most was pashmina headscarves, ceruty, plain, price ≤Rp. 35,000. With the highest level utility value at the price attribute ≤Rp.35,000 with the highest relative importance value of 58.10%.
Metode Iterasi Orde Dua Trapesium untuk Menyelesaikan Persamaan Nonlinear Faliha, Hammi; Subhan, Muhammad
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.v8i3.15032

Abstract

Mathematical problems in determining the roots of nonlinear equations can be solved analytically and numerically. However, very complex nonlinear equations are difficult to solve analytically, so numerical methods are used. Trapezoid Second Order Iteration Method is a method that emerge because of the shortcomings of the Newton Raphson Method and The Secant Method. The purpose of this study is to examine the process of forming the formula for the Trapezoid Second Order Iteration Method, develop an algorithm and find its convergence. This type of research is basic research. The result of numerical simulation tests on several function whose approach point are at two peaks show that The Trapezoidal Second Order Iteration Method is faster than Newton Raphson Method.
PENERAPAN METODE DE NOVO PROGRAMMING DALAM PERENCANAAN PRODUKSI STICK KENTANG PADA UKM DELIMA BANDARA DI KAB. PADANG PARIAMAN Amelja, Vania; Helma, Helma
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.v8i3.15058

Abstract

This research is an applied research conducted aimed at determining how much potato stik products should be produced by UKM Delima Bandara. The De Novo Programming method is used to plan the production of potato sticks in order to generate maximum profits. The data used are primary data, namely data, demand data, raw material availability data, production cost data, and sales price data in 2022. Based on the results of production calculation by rill, UKM Delima Bandara obtained a profit for a years of Rp. 400.626.000, while the profit of the industry if its production planning using the method of De Novo Programming gains a profit of Rs. 410,860,000 in one year. Therefore, with the application of the De Novo Programming method, UKM Delima Bandara can plan production and save use raw materials so as to obtain better profit generation planning with the amount of production of original potato stiks as much as 1.476 kg, cheese potato stiks as much as 1.278 kg, lime leaf potato stiks as much as 1.269 kg, onion potato stiks as much as 1.398 kg, and balado potato stiks as much as 1.237 kg.
Prediksi Penyakit Diabetes Dengan Naive Bayes Wardana, Yuni; Sari, Devni Prima
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.v8i3.15070

Abstract

Diabetes is one of the top ranked diseases for non-communicable diseases which is top cause of death worldwide. Every year 442 million people worldwide have diabetes and 1.6 million people die due to diabetes. With increasing cases of diabetes every year, this detection may need to be done before diabetes occurs. So a research was conducted on diabetes prediction using the Naïve Bayes method. According to the Naïve Bayes model, people with diabetes have a 28% chance of developing diabetes and a 72% chance of not having diabetes. And this research achieved 94% accuracy, 95% precision, and 98% recall.
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.
Pengelompokan Jumlah Kecelakaan Lalu Lintas di Padang Menggunakan Analisis Cluster dengan Metode Non-Hirarki (K-Means) Tiara Angela Hanami; Helma Helma
Journal of Mathematics UNP Vol 8, No 2 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i2.14491

Abstract

Traffic Accidents in August and July 2016. Traffic accidents in West Sumatra Province, especially in Padang City, are relatively high. Based on data from the Central Statistics Agency of Padang City, the number of traffic accident cases has increased from 2016-2021. This study aims to make a pattern in recognizing the characteristics of traffic accidents in the Padang City to minimize the increase in the frequency of accidents in the following year. This type of research is applied research. The result showed that optimizing clusters using the elbow method produced 4 clusters with categories: the first cluster included relatively high traffic accidents in 2021; the second cluster includes groups that have relatively moderate numbers in 2018 and cause material losses in 2021; the third cluster is relatively low, namely material losses in 2016 and 2018; the fourth cluster of very low traffic accidents in July and August 2016.
Optimasi Perencanaan Produksi Usaha Keripik Sanjai Rina Menggunakan Pendekatan De Novo Programming Oktavia, Bella; Winanda, Rara Sandhy
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.v8i3.14976

Abstract

One important part of industry is production planning. Production planning is a strategy to determine how many products to produce and how many resources are needed to make these products. By using the De Novo Programming approach, this research aims to determine the right production planning in the Business of Keripik Sanjai Rina so that the maximum profit is obtained. The De Novo Programming approach can determine the best combination of output and proposed use of resources based on the available budget. This approach can be solved using the simplex method. The results showed that the optimal number of products and the amount of raw material purchases were obtained so that the profit obtained by the Business of Keripik Sanjai Rina increased by 35%.
Analisis Regresi dengan Variabel Dummy pada Faktor Risiko Diabetes Mellitus Tipe 2 Diana, Putri; Murni, Dewi
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.v8i3.14980

Abstract

Diabetes Mellitus is a metabolic disorder that occurs when blood glucose levels exceed normal limits, that is 126 mg/dl. If high blood sugar levels are not controlled, this can lead to complications and even death. This study aims to create a multiple linear regression model and discover the factors that affect blood sugar that it raises the risk of diabetes mellitus. This research using secondary data obtained from the Dadok Tunggul Hitam Health Center. The samples used were 286 samples. Blood sugar level is the dependent variabel, and the independent variabels are age, abdominal circumference, body mass index, and gender. By using multiple linear regression analysis using one dummy variabel, obtaines models:Y’ = 0,000157 -0,000001 X1 - 0,000001 X3 + 0,000013 DThe model shows that with α=5%, the variable that significantly affect blood sugar are gender, age, and body mass index.
Optimasi Lampu Lalu Lintas Simpang Tabuik Kota Pariaman Menggunakan Graf Fuzzy Berbasis FIS Tipe Mamdani Cahyani, Alda Wahyu Regita; Rosha, Media
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.v8i3.15001

Abstract

Poor traffic light regulation is one of the causes of congestion. One of the factors contributing to congestion is inadequate traffic light control, especially at the Tabuik Kota Pariaman intersection. Fuzzy graph is a part of mathematical science that combines graph theory with fuzzy logic. Fuzzy graphs can be used as a method to solve congestion problems related to traffic light durations. This research aims to determine the duration of green light based on queue length. The data collected includes primary data on traffic duration, road width, and the number of vehicles passing through each leg of the intersection. The research results show that by using a fuzzy graph based on the Mamdani fuzzy inference system, the overall average at the Tabuik intersection, the total duration of green light obtained is 80 seconds, which is a decrease of 8.75% from the initial condition, while the total duration of red light obtained is 404 seconds, which is an increase of 1.76% from the initial condition.
Upaya Pengendalian Persediaan Bahan Baku pada Pabrik Tahu NTB Menggunakan Metode Material Requirement Planning Thamrin, Revi Reskya; Helma, Helma
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.v8i3.15034

Abstract

Getting maximum profit is the main goal of every company. To achieve this goal, it is important for companies to control raw material inventories. The NTB Tofu Factory is a factory engaged in food production. The number of requests at the NTB Factory is uncertain which can make the amount of supply exceed or less than demand. So that research will be carried out to control the supply of raw materials and find out the total inventory cost using the Material Requirement Planning method. The lot sizing used are the Lot for Lot technique and the Economic Order Quantity. This research is applied research. This study obtained the results that the most effective technique to apply is the lot for Lot technique because it has the minimum cost. For soybean, a total inventory cost of ???????? 1.200.000 is obtained which can save costs of 66,7%. As for flour raw materials, the total inventory cost value was ???????? 360.000 which could save costs of 59,3%.

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