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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 7 Documents

Search results for , issue "Vol 6, No 4 (2021): Journal Of Mathematics UNP" : 7 Documents clear

Matriks Leslie dan Aplikasinya pada Pemodelan Jumlah Populasi Perempuan di Sumatera Barat Mayang Sugara; Arnellis Arnellis
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The Leslie matrix is a demographic method for calculating the number and growth rate of a population. This method was applied to determine the female population in West Sumatera. The growth of the female population in West Sumatera can affect the population because it has the nature to breed. Based on the Central Statistics Agency for West Sumatera in 2020, it was recorded the population of West Sumatera consisted of 5,534,472 people. This data has increased compared to 2010 amounting to 687,563 people. This study aims to prove the theorem of the characteristics of the Leslie matrix and application the number and rate of the female population in West Sumatera on next two years. This research is an applied research with secondary data obtained through the website of the Central Statistics Agency (BPS) and the West Sumatera Health Service. The research was conducted by proving the characteristics of the Leslie matrix and its use with a matrix size of "16×16" and determining the eigenvalues of matrix. Based on research, it was found that the eigenvalue obtained wan "<1" so the projection for the next two years decreased from the previous years.

ANALISIS METODE ARIMA PADA PERAMALAN NILAI EKSPOR SUMATERA BARAT irwandi irwandi; Devni Prima Sari
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The movement of the export value of the province of West Sumatra every month experiences a fluctuating condition and tends to decline. Exports are very important for the economy in a region. The decline in the value of exports allows a decrease in the amount of production of goods which can result in weakening economic growth in the region. The non-constant export value needs to be analyzed so that it can be used as an indicator for the West Sumatra government in taking policies that maximize export value, such as increasing competence and skills to produce products that are able to compete in the export market. So it is necessary to forecast the export value of the province of West Sumatra so that the government can take some planning in the future. This study aims to determine the form of the forecasting model and the results of forecasting the export value of West Sumatra for the period January 2021 to December 2021. The forecasting method used is the ARIMA method. The results show that the ARIMA (2,1,0) model is a suitable model for predicting the export value of West Sumatra, with the model Y_t=0,00131+0,5265Y_(t-1)+0,1705Y_(t-2)+0,3030Y_(t-3)+e_t.

Model Matematika Penyebaran Penyakit Tungro pada Tanaman Padi dengan Vektor Wereng Hijau Nephotettix virescens Dwi Shinta Kumala Ningsih; Dewi Murni
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Tungro is a disease of rice plants caused by Rice Tungro Spherical Virus (RTSV) and Rice Tungro Bacilliform Virus (RTBV). The green leafhopper Nephotettix virescens is a vector of this disease. The purpose of this study was to determine the form of a mathematical model of the spread of tungro disease by using predators to control its spread and interpret the results of the analysis. The form of the mathematical model is SEI-SIP. This research is a basic or theoretical research. The results of model analysis obtained two fixed points free of disease and two fixed points endemic to spread of tungro. The stability analysis resulted in R_0 which interpreted that the high rate of disease transmission, vector suction power and the transition rate from exposed to infected would result in an outbreak of disease, low predator mortality and high predation rates would reduce the spread of tungro

Pengukuran Value At Risk (Var) Saham Perbankan Dalam Indeks IDX30 Dengan Metode Simulasi Historis wahdini wahdini; Media Rosha
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The problem of the investor is to determine assets for invested until gets profits and not losses. Calculate value the risk using the measurement Value at Risk. The method used Historical Simulation Method by ignoring the normality and time series. This research using secondary data, closing price daily data of the stock banking listed on the IDX30 index in the period August 2020 - July 2021. Calculate data analysis of the daily return of a stock, determine the confident level and time period, estimate the maximum loss and calculate the value of the VaR of each stock. Based on the results of the research when the range of confident 95%, the time series of one day and the initial investment is assumed to Rp.100.000.000 to six banking stocks that BBCA Rp. 2.189.429, BBNI Rp.3.176.740, BBRI Rp. 3.129.625, BBTN Rp. 3.939.326, BMRI Rp. 3.348.373 and BTPS Rp.3. 953.960.

Penerapan Metode Total Opportunity Cost Matrix-Sum Approach (TOCM-SUM APPROACH) dalam Mengoptimalkan Biaya Transportasi (Studi Kasus: PT. Ciomas Adisatwa Padang) Melisa Melisa; Defri Ahmad
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Product distribution issues are common to happen in a business company. From many factors in a company to maximize profits, one of them is the ability to deliver products on time at the minimum cost in transportation. PT. Ciomas Adisatwa Padang distributes their products in the area of the depot and spends a lot of money. If the transportation costs are too much the company will earn small profits. Transportation method to solve problems that involve minimizing transportation costs or product delivery from source to destination is Total Opportunity Cost Matrix-Sum as initial feasible solution and Stepping Stone as an optimization test that is useful for determining the results of optimizing transportation costs and the number of product shipments from each warehouse to destination. The result is carried out using secondary data recorded from the PT. Ciomas Adisatwa Padang in July 2021 in applied research. The initial method of Total Opportunity Cost Matrix-Sum Approach gave Rp. 8.677.366, which was then followed by the Stepping Stone method, which gave Rp. 8.030 974. As a result, the company can save 21% of the total cost on transportation costs in advance.

Metode Partial Least Square (PLS) untuk Menganalisis Kepuasan Pengunjung Terhadap Pelayanan Kantor Camat Koto Tangah Kota Padang Nadia Liaf Putri; Dewi Murni
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Partial Least Square (PLS) method is methods used to analyze visitor satisfaction. Analysis of visitor satisfaction is useful for an agency in an effort to improve the quality of services provided. The purpose of this study was to determine the form of the PLS model in analyzing visitor satisfaction with the services of the Koto Tangah sub-district office and to determine the effect of service quality on visitor satisfaction. The variable used is the visitor satisfaction variable is namely tangibles, reliability, responsiveness, assurance, and empathy. The steps of data analysis carried out were designing a structural relationship model, making measurement models, evaluating structural models and testing hypotheses. Based on the analysis that has been done, it shows that the service quality variable has a positive and significant influence on visitor satisfaction. In the PLS method, the structural equation is obtained, Satisfaction = 0.087 Tangibles + 0.103 Reliability + 0.371 Responsivess + 0.052 Assurance + 0.445 Empathy + ε.

Bootstrap Aggregating Multivariate Adaptive Regression Splines (Bagging MARS) dan Penerapannya pada Pemodelan Produk Domestik Regional Bruto (PDRB) di Provinsi Sumatera Barat Tika Mijayanti; Helma Helma
Journal of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Increased economic growth can help a region's economy grow and demonstrate that the government is capable of improving the welfare of its citizens. The rate of economic growth may be measured by gross regional domestic product (GRDP). This look at turned into performedto decide the factors that maximum effect GDRBinside the province of West Sumatera from 2015 to 2019 using Bootstrap Aggregating Multivariate Adaptive Regression Splines (Bagging MARS). The best model with the lowest GCV value is 7,36868 with BF=8, MI=3 and MO=0 as a combination. Then Bagging was carried out on the initial dataset with 50 Bootstrap replications to obtain the smallest GCV of 5,256292. Based on this, the smallest GCV value obtained from Bagging MARS is smaller than the MARS method. Meaning that the Bagging method can lessen the GCV value and increase accuracy. So that the factors that maximum influence GRDP in the province of West Sumatera are Regional Original Income.

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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

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Defri Ahmad

Contact Email defri_math@fmipa.unp.ac.id

Phone +6281374333545

Journal Mail Official defri_math@fmipa.unp.ac.id

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

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Defri Ahmad

Contact Email
defri_math@fmipa.unp.ac.id

Phone
+6281374333545

Journal Mail Official
defri_math@fmipa.unp.ac.id

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

Location
Kota padang,

Sumatera barat

INDONESIA