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Journal of Mathematics UNP

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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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Model Matematika Jumlah Perokok yang Dipengaruhi Faktor Migrasi dengan Dinamika Akar Kuadrat pada Kondisi Relapse Tria Agus Krisan; Media Rosha
Journal of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract—Smoking is a habit that some people likes, but it causes health, economic, social, andenvironmental burdens not only for smokers but also for others. This study describes a mathematical model of the number of smokers which is influenced by the distribution factor of smokers using the dynamics of the square root in the relapse condition. The population was divided into three subpopulations, namely potential smokers, light smokers and heavy smokers. Based on the results of model analysis, it was found that one endemic equilibrium point of smokers was stable. Environmental influences make there always interactions between potential smokers and light smokers so that there are always smokers. The smaller the interaction between potential smokers and light smokers, the smaller the number of light smokers and heavy smokers. Keywords—Mathematical Model, Smoker Population,Asymptotically Stable, Equilibrium Point.

Faktor–Faktor yang Mempengaruhi Perilaku Konsumen Memilih Mobil Bekas Merk Toyota Menggunakan Analisis Faktor Cindy Febrianita; Minora Longgom; Nonong Amalita
Journal of Mathematics UNP Vol 4, No 2 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract –There are four factors that influence someone or consumer to choose a product: culture factor, social factor, individual factor, and psychology factor. Many factors that influence someone to choose and its have correlation one with another, so we can processed the data using factor analysis. The results of this research indicate that the factors that affect consument choose to buy secound car brand Toyota there are some factors, the factor is recommendation to choose the product, life style, perception to choose the product, motivation to choose the product, parent existence, and job. Keywords: factors of consumer behavior, secound car brand Toyota, factor analysis

Pengklasifikasian Status Kerja pada Angkatan Kerja di Kabupaten Tanah Datar Menggunakan Metode CART dan Metode CHAID Yulia Rizki Fajriati; Syafriandi - Syafriandi
Journal of Mathematics UNP Vol 7, No 3 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Tanah Datar Regency experiencing an increase in population, but the number of workforce doesn’t increase. It makes the number of population with the workforce imbalance so that the public welfare decreased. Beside decreasing in public welfare, the workforce also has impacts in their employment status. Therefore, the classification needs to bee done to find out the dominant factors to identified certain characteristics from certain segment using CART and CHAID methods. The results from CART and CHAID methods has obtained that the marriage status is the most dominant variable in classifying employment status in Tanah Datar Regency. Meanwhile, the best methods to classify the employment status in workforce in Tanah Datar Regency is CART method. It can be seen from the 73,9% accuracy and 26,1% of APER

¬¬¬Pemodelan Matematika Penyebaran Penyakit Covid-19 dengan Menggunakan Model SIRS Maghfira Izzani Afwan; Helma Helma
Journal of Mathematics UNP Vol 6, No 2 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Covid-19 is a collection of viruses that infect the respiratory system and cause death. Covid-19 is transmitted through a liquid splash that is released when an infected individual coughs, sneezes or talks. Prevention of Covid-19 transmission can be done by not making contact with infected people, because there is a possibility that patients who have recovered from Covid-19 will be infected again due to a decreased immune system in the body. The purpose of this study was to determine the form of a mathematical model in the spread of the Covid-19 disease using the SIRS model and interpret the results of the analysis from the mathematical model. The method used is to analyze the conditions related to the problem so that it can be done to form a mathematical model of the spread of the Covid-19 disease. Based on the results of the analysis, the spread of the Covid-19 disease is influenced by the level of transmission due to contact with people infected with Covid-19, the presence of immigrants entering Indonesia from countries infected with the Covid-19 disease and a decreased immune system in people who are infected with Covid-19 has recovered from the Covid-19 disease.Keywords — Mathematical Model, SIRS Model, Covid-19Abstract — Covid-19 is a collection of viruses that infect the respiratory system and cause death. Covid-19 is transmitted through a liquid splash that is released when an infected individual coughs, sneezes or talks. Prevention of Covid-19 transmission can be done by not making contact with infected people, because there is a possibility that patients who have recovered from Covid-19 will be infected again due to a decreased immune system in the body. The purpose of this study was to determine the form of a mathematical model in the spread of the Covid-19 disease using the SIRS model and interpret the results of the analysis from the mathematical model. The method used is to analyze the conditions related to the problem so that it can be done to form a mathematical model of the spread of the Covid-19 disease. Based on the results of the analysis, the spread of the Covid-19 disease is influenced by the level of transmission due to contact with people infected with Covid-19, the presence of immigrants entering Indonesia from countries infected with the Covid-19 disease and a decreased immune system in people who are infected with Covid-19 has recovered from the Covid-19 disease. Keywords — Mathematical Model, SIRS Model, Covid-19

Penentuan Nilai Opsi Saham Karyawan (OSK) dengan Memperhitungkan Efek Dilusi Menggunakan Metode Lattice Trinomial Neneng Gusnela; Defri Ahmad
Journal of Mathematics UNP Vol 5, No 1 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract—Aim of this paper is to determine the value of Employee Stocks Options (ESO), in which the calculation is different with another options. This paper is based on literature study and example of the case is simulated by using computer software. Dilution effect that will causes a decrease in the stock value was also considered in this paper. Lattice trinomial method is used to modelling the stocks price movement. Based of the results of this paper, we obtain the value of ESO and observe the parameter effects. The influences of strike price, employee exit rate, and vesting time are inversely proportional to the value of ESO, while the interest rate and volatilitas are directly proportional to the value of ESO.Keywords—employee stocks options, dillution effect, lattice trinomial.

Faktor-faktor yang Mempengaruhi Jumlah Kelahiran di Provinsi Sumatera Barat dengan Menggunakan Analisis Faktor Resti Febrina; Nonong Amalita; Dewi Murni
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract –– The Problem of birth is one of the unresolved issues in West Sumatra. The birth rate in western Sumatra in the high category, where a mother gives birth to an average of three to four childrens. Increasing the number of births means that population growth will affect the welfare of society. It required effort to see birth control factors affecting birth. To find out which factors that affect the number of births in the province of West Sumatra is used by factor analysis. Base on the results obtained the data analysis three factors that affect the number of births in the province of West Sumatra that women with low education or undergraduate, women who married at the end of adolescence, and women who are married under-age and use contraceptive. Keywords –– Factor analysis, Problem of birth, and Number of birth.

Model Matematika Tendangan Pisang Sepak Pojok pada Olahraga Sepakbola tomy aprinaldi; media rosha
Journal of Mathematics UNP Vol 4, No 3 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Football is the most interest sport by the public. The problem in football is a want to many scores. Scoring on football can be from open play and set play. In this research, the authors chose to conduct a scoring research through the set play from a football corner with a banana kick technique. The purpose of this research are: Forming a mathematical modeling banana kick of corner on football, analyzing the model, and interpreting model analysis results. The banana kick math model of the football corner is a regular differential equation-shaped system. The solution of this model to use a numerical solution with the fourth order Runge-Kutta method. Then, done simulation by using matlab. Simulated results show that, with an initial velocity 29,5 m/s the ball will be goal, but with initial velocity 23 m/s and 35 m/s the ball will not goal. Keywords — Mathematical Modeling, Banana Kick, Corner Kick.

Penggunaan Metode Triple Exponential Smoothing Tipe Brown dalam Meramalkan Pergerakan Kasus Positif Covid-19 di Kota Padang Nurul Umiati Husna; Arnellis Arnellis
Journal of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Covid-19 is an infectious disease that caused by SARS-CoV-2 virus. This virus can cause the patient gotten respiratory problems, such as Pneumonis, SARS, and MERS. The amout of Covid-19 cases have been increased everyday. Therefore, it is necessary to do forecasting for the movement of positive Covid-19 cases in Padang City for the next few days. The purpose of this research was to find out the form of a model for the movement of positive Covid-19 cases in Padang City and to know the results of the movement of positive Covid-19 cases in Padang City. The type of this research is applied research. The method that used in this research is Triple Exponential Smooting Brown Type with the parameter of α that minimize the value of MSE was 0,29. The results of this research showing the movement of positive Covid-19 in Padang City from August 15, 2020 to August 19, 2020 was 907, 933, 960, 987, and 1016 cases. Keywords — Covid-19, The movement of positive cases, Forecasting, Triple Exponential Smoothing Brown Type.

Optimasi Pendistribusisan Air Menggunakan Improved Zero Point Method (Studi Kasus di PDAM Tirta Kepri) Kurnia Apridita Utami; Media Rosha; Meira Parma Dewi
Journal of Mathematics UNP Vol 4, No 1 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – Clean water is a basic necessity for human beings that must be fulfilled. One of business entities enganged in the activities of the fulfillment of the need of clean water is PDAM Tirta Kepri. In its activities, some constraints are found that can increase distribution cost. To minimize the distribution cost at PDAM Tirta Kepri, Improved Zero Point Method is used. This method is a method to optimize transportation problem that can provide optimum solution directly without the aid of modification of other methods. The result of the calculation of the cost of the distribution done by PDAM Tirta Kepri from two springs and four distribution areas is Rp 20.397.467,12. By using the Improved Zero Point Method, the cost obtained is Rp 20.198.416,44,- Therefore, Improved Zero Point Method can optimize the distribution cost problem at PDAM Tirta Kepri without the aid of modification from other methods on transportation problem table.Keywords – Optimization, IZPM, Distribution of Water.

PEMODELAN MATEMATIKA PENYEBARAN PENYAKIT LEPTOSPIROSIS DENGAN PENGARUH TREATMENT Ingrit Ridha Rahayu; Muhammad Subhan
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Leptospirosis is a disease passive from bacteria and affect humans and animals.Leptospirosis is transmitted from human to human, from animal to animal, from animal to human. In this study, we will look for a mathematical model of the spread of Leptospirosis with the effect of treatment. The purpose of this modelling is to determine the spread of Leptospirosis with the effect of treatment, to determine the analysis of the mathematical model of the spread of Leptospirosis with the effect of treatment, and to determine the interpretation of mathematical model of the spread of Leptospirosis with the effect of treatment. This research past by determining the variables, parameters, and assumptions which linked to the problem, so that the mathematical model spread of Leptospirosis disease with the effect of treatment. After that mathematical model of the spread of Leptospirosis disease with the effect of treatment will be analyzed and interpreted. Based on analysis result point out that at a fixed point free disease, where the fixed point free disease is stable.

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Defri Ahmad

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defri_math@fmipa.unp.ac.id

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+6281374333545

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defri_math@fmipa.unp.ac.id

Editorial Address
Jl. Prof. dr. Hamka Air Tawar Barat Padang

Location
Kota padang,

Sumatera barat

INDONESIA