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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 10 Documents

Search results for , issue "Vol 7, No 1 (2022): Journal Of Mathematics UNP" : 10 Documents clear

Faktor-Faktor Yang Mempengaruhi Konsumen dalam Memilih Sepeda Motor dengan Menggunakan Analisis Faktor (Studi Kasus Mahasiswa Matematika FMIPA UNP) Resi Arsiva; Arnellis Arnellis
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The poor public transportation makes people choose motorbikes as the main transportation. The purpose of this research is to know what factors can influence the consumers in the course of choosing motorbike within study cases on department mathematic of UNP students.The questionnaire distributed used total sampling technic. There are four factors that influence consumers in the course of choosing motorbike. The first factor is current development, family members, lifestyle, satisfaction to product, learn from experience, consumer attitude to product, and experience. The second factor is parents profession, economic situation, and parents income. The third factor is friend and elder people existence. the fourth factor is bad and good viewpoint to product and parents experience.

Penentuan Cadangan Premi pada Asuransi Jiwa Berjangka Status Joint Life Menggunakan Metode Canadian Fira Septiyani Ibrahim; Dewi Murni
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

The Premium reserves is an obligation that must be owned by a life insurance company to provide compensation to the heirs in the event of a claim. The purpose in this research is to formulate a premium reserves formulation for term life insurance with joint life status. This research is a theoretical study that examines the calculation of the joint life status term life insurance premium reserves using the Canadian method which the 2019 Indonesian Mortality Table (TMI) and examples of case applications. The calculation of reserves begins by forming a joint mortality and commutation table for two insured persons, forming a formula for combined life annuity, single net premium, and annual net premium. Thus, in this study, the formulation of joint life insurance premium reserves using the Canadian method is obtained.

Peramalan Hasil Produksi Ikan Kerapu Provinsi Sumatera Barat dengan Menggunakan Pemulusan Eksponensial Ganda Tipe Holt dan Triple Tipe Brown Silvia Hanifah Derisna; Helma Helma
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Grouper is marine fish found in Indonesian waters which are very popular and have high market prices. The production of grouper in West Sumatra is produced by cultivation using floating net cages and direct fishing. The purpose of this study is to form a forecasting model for grouper production of West Sumatra. Also this study to predict the production of grouper based on the model formed using Holt type double exponential smoothing and brown triple exponential smoothing. The data collection method used is data on grouper production of West Sumatra province from 2008 to 2020 which was obtained from the Marine and Fisheries Service of West Sumatra Province. The method used is Holt type double exponential smoothing and brown type triple exponential smoothing. Based on the forecasting model, the forecast results for the next 5 years have increased compared to the previous year's production. By using the Holt type double exponential smoothing method, the predicted results in the year 2021-2025 are 4553.83, 4761.96, 4970.08, 5178.20, 5383.33, while using the brown type triple exponential smoothing method the results are obtained successive forecast of 4868,89, 5160,70, 5464,24, 5779,52, 6106,53.

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.

Pembentukan Portofolio Optimal pada Saham Jakarta Islamic Index Menggunakan Model Indeks Ganda Ulfa Zuliantika; Dewi Murni
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Investment is a process of placing a number of funds at this time in the hope of making a profit in the future. But, the higher the expected return the higher the risk. To minimize the risk, investors can form optimal portfolio.The purpose of this research is to determine the composition and proportion of stocks that form the optimal portfolio and determine return and risk of optimal portfolio. The type is this research is applied research using secondary data. The data are stocks of Jakarta Islamic Index period August – November 2020. Index in this research is IHSG, DJIA and HSI. The method used is Multi Index Model. The result of this research is obtained composition 2 stocks to be made as the optimal portfolio, this is JPFA 59.3044% and SMGR 40.6956% with a value of expected return portfolio is 4.505013% and risk of portfolio is 2.028694%.

Optimasi Rata - Rata Produksi Ubi Kayu dan Kedelai di Kabupaten Pasaman Barat Menggunakan Pemrograman Kuadratik Metode Wolfe Nurul Hikmah; Defri Ahmad
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

This research aims to form a mathematical model in the problem of optimizing the average yield of cassava and soybean yields in West Pasaman Regency based on data from the West Pasaman Statistics Agency from 2007 to 2017 regarding the harvest area and average production of cassava and soybeans. The solution to the average production optimization problem uses the Wolfe's Method of Quadratic Programming. Wolfe method is used using a two-stage simplex iteration. The mathematical model formed is a non-linear equation. The estimation of parameters in the mathematical model uses the least squares method, which is calculated using the Matlab software. Optimization results using the Wolfe Method Quadratic Programming obtained an average of 340.95 kw / ha of cassava and soybeans, with an optimal harvest area of 255.38 ha of cassava and 469.5 ha of soybean harvest area.

Model Matematika Dinamika Penyakit Pneumonia dengan Carriers windi jelita; Defri Ahmad
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Pneumonia disease is an infIammatory disease of the lungs (alveoli) caused by the bacterium Streptococcus pneumonia. When the body's immune system decreases, Streptococcus pneumonia will multiply and cause damage. Individuals colonized with Streptococcus pneumonia act as reservoirs for disease transmission. In Indonesia this disease is an endemic disease. In this study, a mathematical model is presented to describe the population of pneumonia in infants and toddlers. The purpose of this study was to determine the form of a mathematical model on the spread of disease, to know the results of the analysis and interpretation of the results of the analysis of the mathematical model of the spread of pneumonia with carriers. This research begins by determining the variables, parameters and assumptions related to the problem. The model that has been formed will then be analyzed. From the analysis obtained two fixed points, namely disease-free and endemic. From the results of the analysis, it was also obtained that the rate of individual contact could increase the spread of the spread of infected and infected individuals who were resistant to the body while being able to carry the spread of pneumonia

Rekomendasi Pemilihan Smartphone Menggunakan Metode TOPSIS Deva Eliza; Defri Ahmad
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Smartphone is one of electronic devices in the form of communication tool which in this time the development following market demand. There are many kind of smartphone in the market with various criteria such as price, storage, ram, front camera, main camera and processor. This matter cause many consumers confuse to choose smartphone they will buy, it because there are various type, specification, and price offered when someone make decisions to purchase smartphone. Many consumers always mistakenly choose smartphone according to their need can't be denied. So that smartphone recommendation election be required. The purpose of this research are to know which criteria would be priority of the best smartphone election and to know recommendation in smartphone election based on alternative and criteria selected. The method which can be used to solve smarphone selection problem is Technic for Order Preference by Similarity to Ideal Solution (TOPSIS). The best smartphone recommendation based on budget range is Oppo A52, midranger is Vivo V20 2021, flagship is Asus Zenfone 6 ZS630KL, premium is Xiaomi Mix Alpha.

Analisis Sensitivitas Model Black-Litterman Menggunakan Treynor Ratio pada Portofolio Saham Puja Ermiati; Devni Prima Sari
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Investment is an activity that can not separate from return and risk, so that forming portfolio is important to risk minimizing and profit optimizing. One of way to optimizing portfolio is using Black-Litterman model. This model is model that combine equilibrium return by CAPM eith investor’s views about return an asset. Purpose of this research are to form Black-Litterman model with tau calibration and measure the best portfolio performance with treynor ratio. This research used secondary data stock in LQ-45 index during August 2019-January 2020. Selecting portfolio by selecting high return expected CAPM are CPIN, WIKA, ADRO and CTRI. Forming portfolio using Black-Litterman model by calibration so obtain the best measure performance by Treynor Ratio are 0,12142 with =1 and potfolio return 0,26445

Optimasi Penjadwalan Produksi Sanjai Rina Menggunakan Algoritma Campbell Dudek Smith annisa yovinda; Defri Ahmad
Journal of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Kerupuk sanjai Rina business always run into lateness in product delivery because they haven’t done production which will be deliver and delivery deadline only based on intuition. Sanjai Rina have need to establist a better production schedule so that be able to minimizing all product work time total. There are many ways to minimizing total of work time, one of them is using Campbell Dudek Smith (CDS) algorithm. The purpose of the research to know best outcome sanjai Rina production prosess scheduling using CDS algorithm. CDS algorithm obtain k iteration with different values. From k iteration, minimal value will be use to determine production thread. Sanjai Rina business have total time work all of product is 435,88 hours by sequence 1-2-3-4-5-6-7-8. From CDS algorithm iterations, obtain minimal scheduling by sequence 4-8-3-1-2-6-7-5 with total work time all of yhe product is 375,26 hours that will attain saving 60,22 hours time work.

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Home Page

OAI Link

Editorial Team

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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

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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

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