Journal of Mathematics UNP
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.
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<![CDATA[Penerapan Metode Mamdani dalam Menentukan Tingkat Resiko Gizi Buruk Ibu Hamil di Puskesmas Pemancungan ]]>
<![CDATA[Dini Kamala Sari]]>;
<![CDATA[muhammad subhan]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4675
<![CDATA[Abstract –Assessment of nutritional status is very important during pregnancy, because it greatly affects the health of the mother and fetus. To reduce mistake in nutritional assessment and the lack of certainty to find out how much the level of risk of malnutrition in pregnant women, fuzzy logic can be used. This study uses the Mamdani method with the affirmation of the centroid method. There are three variables used in this study which is mid upper arm, hemoglobin and weight gain. The result of this study of eighteen pregnant women obtain ten at high risk, three at moderate risk, and five people at low risk.]]>
<![CDATA[Bentuk Model Nonlinear untuk Portofolio Optimal dan Penyelesaiannya Menggunakan Metode Separable Programming ]]>
<![CDATA[Uswati Hasnah]]>;
<![CDATA[Suherman Suherman]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4683
<![CDATA[ Abstract – Investment is a business that is carried out in the form of placing funds in order to obtain profits in the future. When investing, an investor always expects maximum return with minimal risk. In other words, investors need to form an optimal portfolio. This is related to optimization theory. For this reason, an optimal nonlinear model portfolio will be formed, along with the solution, using the Separable Programming method. The steps taken are to form a nonlinear model for optimal portfolios, then apply the model to investment for stock in the Bank Rakyat Indonesia (BBRI) and Bank Central Asia (BBCA), then complete the model using Separable Programming. Based on the results of the study, the optimal portfolio nonlinear model is obtained, namely the total expected return minus the portfolio risk. Completion of the model using Separable Programming results in a comparison of the proportion of funds that will be invested in BBRI and BBCA stocks]]>
<![CDATA[Estimasi Bayes pada Distribusi Pareto dengan Data Tersensor Tipe II ]]>
<![CDATA[Atika Ahmad]]>;
<![CDATA[Nonong Amalita]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4673
<![CDATA[Abstract Parameter’s estimation is used to estimate the parameter values of a discrete distribution as well as a continuous distribution. One form of continuous distribution is the Pareto distribution, where the Pareto distribution has parameters, they are theta dan lambda. The method used to estimate parameters is Bayes estimation. Bayes Estimation has its own way of determining the initial distribution form (prior) and posterior distribution. Parameter’s estimations are also used in one statistical analysis technique that investigates the survival of an product or individual. The life test data used is type II censored data where the experiment will be stopped after getting r data. This reseach aims to determine the form of parameter estimators and in the Pareto distribution on type II censored data using Bayes estimation. The results in this reseach obtained the form of posterior distribution from Pareto distribution on type II censored data and form of estimator theta dan lambda.]]>
<![CDATA[Model Matematika Zakat dalam Pengurangan Kemiskinan ]]>
<![CDATA[Lani Widia Putri]]>;
<![CDATA[muhammad subhan]]>;
<![CDATA[Media Rosha]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4678
<![CDATA[Abstract –Poverty is condition where people have lack of income to fulfill basic living needs. The condition is cause by some reasons like less of natural resources, less of human resources, and less of financial. Zakah is a effort to poverty decrement. To determine the factors that should be improved that we use mathematical model. Mathematical model of zakah in form of nonlinear differential equation system. Based on analysis of factor model than influence poverty decrement are zakah influence level, business success level, and interaction level. The simulation it looks interaction level is more large to reach stability than other factors, it means that more height the interaction level makes more optimum to poverty decrement. ]]>
<![CDATA[Penentuan Harga Opsi Jual Amerika dengan Menggunakan Metode Gerak Brown Geometri ]]>
<![CDATA[Yuli Andari Wulan]]>;
<![CDATA[Dony Permana]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4684
<![CDATA[ Abstract– An option is a contract that gives the owner the right to buy or sell a number of instruments that relied upon the contract at a certain price and within the time period specified. There are two types of options that are known, namely call option and put option. Based on execution time, options can be divided into two types, namely the European type options and option types are American. The purpose of this research that is shaping the American Option pricing formula by using the method of geometric Brownian motion. The steps undertaken in this research is studying price movements of stocks, models, and interpret the options pricing models are selling America. Option price is affected by the movement of the stock price, strike price, volatility, the average rate of return (return) stock price, risk-free interest rate, and time to maturity..]]>
<![CDATA[Peramalan Jumlah Produksi Kayu Manis di Sumatera Barat dengan Metode Pemulusan Eksponensial Tripel Tipe Brown ]]>
<![CDATA[Athifah Rahmi]]>;
<![CDATA[Helma Helma]]>;
<![CDATA[Riry Sriningsih]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4672
<![CDATA[Abstract - Cassiavera in West Sumatra is part of the plantation sector, which provides largest export value to local revenue. However, in 2006-2015 the total of cassiavera’s production of West Sumatra has decreased fluctuation. Therefore it is necessary to estimate the amount of cassiavera production in future. The purpose of study was to determine total’s mode of cassiavera’s production in West Sumatra, Kab. Tanah Datar and Kab. Agam and know the results of the forecast production quantities of cassiavera. The data used is BPS data’s in Padang city 2006-2015. The method used is the method of Triple Exponential Smoothing Brown mode with parameter α. When setting parameter α then used MSE (Mean Square Error). The results of the forecast production total of cassiavera in three regions in 2016-2020 sequentially in tonnes is 29531.88, 31505.98, 33869.79, 36623.31 and 39766.54; 2660.16, 2334.63, 1999.18, 1653.79 and 1298.47; 4783.84, 4652.65, 4518.58, 4381.63 and 4241.81.]]>
<![CDATA[Model Matematika Penanggulangan Pencemaran Udara ]]>
<![CDATA[Eri Ranyusa Putri]]>;
<![CDATA[muhammad subhan]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4677
<![CDATA[Abstract-Air pollution is a change in the composition of substances in the air from normal conditions. An air is said to be polluted if a certain amount of substance that is in the air for a long period of time exceeds its safe limit. Substances that most influence the occurrence of air pollution are carbon monoxide produced by vehicles. The purpose of this research is to form a mathematical model, analyze mathematical models that have been obtained, and interpret the results of the analysis of the mathematical model. This research is a basic research, which starts from creating variables, parameters, and assumptions. Mathematical models for air pollution control are obtained by nonlinear differential equation systems. The results of the model analysis obtained a fixed point that is not stable, so that we can do air pollution prevention by the number of trees must be a lot of carbon dioxide produced from the process of hydroxyl oxidation and carbon monoxide produced by existing vehicles.]]>
<![CDATA[Optimisasi Penyusunan Jadwal Menggunakan Pendekatan Pembangkit Kolom (Column Generation) ]]>
<![CDATA[Nur Shayara Kamila]]>;
<![CDATA[Yerizon Yerizon]]>;
<![CDATA[Meira Parma Dewi]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4680
<![CDATA[Abstract – Scheduling problem can be modeled by using linear integer programming and completed using the column generation method. Column generation methods taking sub-set of the set of large columns to be resolved. This new column is generated when variables corresponding to that column potentially optimize the purpose function. The purpose of this research is to model integer program for scheduling, forming process with column generation approach, and get optimization result from scheduling. This research is the oretical research. Which is a literature study based on the relevant sources. Based on the result, obtained model scheduling problem in the form of linear integer program, the scheduling model is processed by the column generation method, that is Master Problem formation, Restricted Master Problem, then RMP is formed dual so tested using pricing problem until got optimal result. The method was applied to the sample in order to get the most optimal schedule. ]]>
<![CDATA[Pengaruh Volume Terhadap Harga Saham pada Trading Activities PT. BCA Tahun 2017 dengan Menggunakan Metode Theil ]]>
<![CDATA[Arshie Nur Aisyah]]>;
<![CDATA[Helma Helma]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4671
<![CDATA[Abstract− The relationship between the volume and stock price is used as a reference by investors in buying and selling stock. But many of the novice investors don’t know the relationship between stock prices and volumes, resulting in errors in conducting stock transactions. Research was conducted to see the effect of volume on stock prices by using the theil method to match the regression line. This study produced a regression model. The slope coefficient of the regression model, 95% will be between 11.92799 to 24.91132 and the determination coefficient is 0.99530761 which indicates that 99.53% of the volume can explain stock prices while the rest is influenced by other variables not included in the model.]]>
<![CDATA[Pengklasifikasian Penerimaan Beasiswa Bidikmisi FMIPA UNP Tahun 2016 dengan Menggunakan Metode Classification and Regression Trees ]]>
<![CDATA[Elfin Innaka Hamidah]]>;
<![CDATA[Yenni Kurniawati]]>
<![CDATA[ Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v3i2.4676
<![CDATA[Abstract – This study discussed about classification of Bidikmisi Scholarship Recipient. The classification was used by Classification and Regression Trees (CART) to college students who proposed Bidikmisi in Mathematics and Natural Sciences Faculty of State University of Padang at 2016. The purpose of this research is to determine characteristic of college student recipient and not recipient of Bidikmisi Scholarship based on seven variable that influence. Optimally Trees was obtained with choose the best separator based on maximal improvement values. Optimally trees was produced four variable, father’s occupation, mother’s occupation, Father’s Income, and building area. Characteristic of college student who bidikmisi recipient was parent’s occupation as farmer or etc. (as like as unemployment, the taxi bike, construction laborers, etc.) and father’s income one million. While characteristic of college student that not bidikmisi recipient were Father’s occupation as civil servants, employees, entrepreneurship, or fisherman.]]>
