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[Penggunaan Metode Attained Age Normal dan Projected Unit Credit Pada Perhitungan Pembiayaan Dana Pensiun (Studi Kasus: PERUMDA Tirta sakti Kerinci) ]]>
<![CDATA[Miranda, Dede]]>;
<![CDATA[Arnellis, Arnellis]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13669
<![CDATA[The problem in this study is that PERUMDA Tirta Sakti must provide guarantees to employees regarding pension funds. This study aims to calculate the amount of normal contributions, actuarial obIigations, using the AAN and PUC methods. This is applied research, and the participants are all PERUMDA Tirta Sakti Kerinci employees. Purposive sampling is the method of sampling.When compared to the Projected Unit Credit method, the findings demonstrated that the normal contribution calculated using the Attained Age Normal method increased significantly as one approached retirement age. The PUC method yields a lower amount of actuarial liabilities than the AAN method. The total amount of accumulated pension contributions has an impact on the size of theiipension benefit. The amassed annuity commitments are straight forwardly corresponding to the benefits got by the members.]]>
<![CDATA[Penggunaan Metode Autoregressive Integrated Moving Average untuk Meramalkan Nilai Tukar Petani di Sumatera Barat ]]>
<![CDATA[Yosela, Fiera]]>;
<![CDATA[Arnellis, Arnellis]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13817
<![CDATA[Resident of West Sumatra is mostly absorbed in the agricultural sector. The welfare of farmers is the main priority which is believed to be in development in that sector. Therefore we need a benchmark to measure prosperity of peasant, either is farmer’s exchange rate. This study has goal of get best ARIMA model to predict the farmer’s exchange rate of West Sumatra. Research results to get greates model ARIMA (1,1,1) have smallest MSE vaIue 2681^(-9). The shape of the model is Y_t^0.09=0.0005685-0.5270Y_(t-1)^0.09+Y_(t-1)^0.09+0.5270Y_(t-2)^0.09+0.9921e_(t-1)+e_t.]]>
<![CDATA[Pemodelan Matematika Penyebaran Penyakit Toksoplasmosis dengan Pengaruh Vektor ]]>
<![CDATA[Risman, Junero]]>;
<![CDATA[Rosha, Media]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13882
<![CDATA[Toxoplasmosis is a sickness as a result of the parasite Toxoplasma gondii, which can attack humans and animals, especially cats. The reason for this investigation is to discover the model, the results of model analysis, and an interpretation of the results of a mathematical model analysis of the spread toxoplasmosis by vector effects. The strategies used on this take a look at are descriptive. A mathematical model of the spread toxoplasmosis by vector influence takes the form of a nonlinear system of equations consisting of eight nonlinear equations. Analysis results of a mathematical model with two fixed points, a disease-free fixed point and a diseased fixed point. Each is asymptotically stable, subject to several conditions. The resulting baseline reproductive numbers indicate that the disease is becoming epidemic as the horizontal transmission rate and transmission rate from the latent population to the infected population within the vector increase.]]>
<![CDATA[Analisis metode chi_squared automatic interection detection untuk klasifikasi uang jemput pada tradisi pernikahan di kecamatan pariaman utara ]]>
<![CDATA[Ardatama, Rahul]]>;
<![CDATA[helma, hema]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13819
<![CDATA[One of the areas in Minangkabau which is famous for its marriage customs is Pariaman. Because there is a bajapuik tradition that requires a uang jemput for Ajo Piaman. According to the Head of the Nagari Customary Density in North Pariaman District, Ajo Piaman's uang jemput are certainly different and the factors that affect Ajo Piaman's uang jemput are employment, education, age, income, title, marriage, property, and year of marriage. The population of this study is partly Ajo Piaman and the sample is 100 Ajo piaman in North Pariaman District who are married. The purpose of this study was to determine the factors that affect Ajo Piaman's uang jemput and to find out the results of the classification of Ajo Piaman's uang jemput using CHAID analysis. The results of this study indicate that education, income and year of marriage factors affect uang jemput in North Pariaman District.]]>
<![CDATA[Estimasi Value At Risk (VaR) Kunjungan Wisatawan Mancanegara Ke Sumatera Barat ]]>
<![CDATA[Maulani, Fiqrah]]>;
<![CDATA[Rosha, Media]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13991
<![CDATA[West Sumatra Province has become one of the destinations for foreign tourists to travel. There are many types of tourism in West Sumatra, ranging from cultural tourism, sports tourism, religious tourism, and culinary tourism. Because of this existing tourism potential, it is necessary to estimate the maximum loss from tourist visit revenue. One of the risk management for tourism budget losses is by using the Value at Risk method. Value at Risk , namely estimation of the biggest potential loss for a certain period with a certain level of confidence and normal market conditions. Estimation VaR is carried out for forecasting the number of foreign tourist visits from Jan-Jun 2022 with α=5%. The budget issued by the West Sumatra Provincial Office for tourism development is IDR. 209.481.220,00. Then obtained VaR value of IDR. 112.801.838.04. This means that the biggest loss opportunity borne by the Provincial Government of West Sumatra in the next month from foreign tourist visits to West Sumatra is IDR 112,801,838.04 against a value of IDR 872,400,000.00.]]>
<![CDATA[Analisis Pemilihan Supplier Bahan Baku Menggunakan Multi-Choice Goal Programming (Studi Kasus: Jagung Super Manis F1 Aina Batuhampar) ]]>
<![CDATA[Filfiqri, Hamimatul]]>;
<![CDATA[Sari, Devni Prima]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13835
<![CDATA[Supplier selection is a stage to determine the best suppliers needed by industry players to provide materials or raw materials in the production process. To obtain quality raw materials, companies must be selective in choosing suppliers. The study aims to facilitate the decision-making process in selecting raw material suppliers for Aina Batuhampar Super Sweet Corn F1 with Multi-Choice Goal Programming. This study analyzes the loss value for each criterion with the TLF and determines the weight value of each criterion with the AHP. These represent both of them the coefficients of MCGP is to determine the best supplier using Lindo software. The objective function by calculating using Lindo, we conclude that the best supplier priorities for Aina Batuhampar's F1 super sweet corn sequentially E, A, C, D, and B with respective cost are Rp. 7.175, Rp. 92.534, Rp. 104.222, Rp. 110.171, and Rp. 110.603.]]>
<![CDATA[Analisis Faktor Pada Faktor-Faktor Yang Mempengaruhi Stres Guru SD Selama Sistem Pembelajaran Daring Era Covid-19 (Studi Kasus di SD Kecamatan Padang Timur) ]]>
<![CDATA[Fadilah, Dinda]]>;
<![CDATA[Rosha, Media]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13990
<![CDATA[Stress is one of the effects that arise due to the covid-19 pandemic, one of which is experienced by teachers at the elementary school level. This can happen because at the elementary school level, if it is seen from students who are only 7-12 years old, who are still ordinary in terms of using technology, elementary school teachers feel more difficult to carry out online learning process. The purpose of this study is to find out what factors significantly affect the stress of elementary school teachers in the subdistrict of Padang Timur during the online learning system in the covid-19 era. This type of study was an applied study with the spread of the questionnaire among 88 respondents selected using the random sampling cluster method. The results of the study were obtained by seven factors that influenced the stress of elementary school teachers in the subdistrict of Padang Timur during the covid-19 online learning system including educational factors, learning implementation factors, teacher's information technology skills factors, learning process and assessment factors, family factors, the low motivation for students' learning and media factors for online learning.]]>
<![CDATA[Fuzzy Service Quality dalam Analisis Kepuasan Pengunjung terhadap Kualitas Pelayanan Objek Wisata Kapalo Banda ]]>
<![CDATA[Dipinta, Yona]]>;
<![CDATA[Helma, Helma]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13842
<![CDATA[Kapalo Banda is one of the tourist attractions located in Fifty Cities Regency. The research conducted in Kapalo Banda is related to visitor satisfaction for the elements of the services provided by applying the fuzzy service quality method. Fuzzy service quality is a combination of service quality methods and fuzzy logic. The service quality method can measure service quality based on five dimensions, namely: physical evidence (tangible), reliability (reliability), responsiveness (responsiveness), assurance (assurance), empathy (emphaty). Based on the results of this study, it was found that visitors were not satisfied with the services they received. This is because there are five positive gap values and ten negative gap values. Therefore, it is necessary to make improvements. The attribute that is used as a reference for improvement is the one with the highest negative gap value.]]>
<![CDATA[Model Matematika Tipe SIQR Penyebaran Penyakit Difteri Dengan Pengaruh Vaksinasi ]]>
<![CDATA[Putra, Kevin Pramana]]>;
<![CDATA[Rosha, Media]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13993
<![CDATA[The Bacteria Corynebacterium diphtheria is the cause of the possibly deadly infectious disease diphtheria. The esophagus and upper respiratory tract are attacked by these bacteria. This study’s objectives were to develop a mathematical model of diphtheria spreading of the SIQR tyoe with the influence of vaccination, analyze equilibrium point stability and interpret model simulation results. The type of research is theoretical research. This study uses descriptive methods to analyze theories about diphtheria. Two equilibrium points are obtained based on the analysis results of the SIQR model. When the basic reproduction number is less than 1, there exists an asymptotically stable disease-free equilibrium point. On the other hand, if the basic reproduction number is greater than 1, there are two equilibrium points.Asymptotically stable endemic balance and unstable disease-free balance. One way to control the spread of diphtheria is through vaccination. The higher the vaccination coverage, the more diseases will be eradicated from the population.]]>
<![CDATA[Simulasi Monte Carlo dan Penerapannya dalam Menentukan Probabilitas Pergerakan Saham Indeks LQ-45 ]]>
<![CDATA[Anastasia, Vira]]>;
<![CDATA[Subhan, Muhammad]]>
<![CDATA[ Journal of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP ]]>
Publisher : <![CDATA[UNIVERSITAS NEGERI PADANG ]]>
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DOI: 10.24036/unpjomath.v7i4.13769
<![CDATA[The problem for investors when investing is determine stocks that have the opportunity to move up that they get maximum profits in the future. The purpose of this study is to determine the opportunities for movement of the LQ-45 index stock. This study uses data on closing prices for daily stocks listed the LQ-45 index in the period February 2021-January 2022. To find out the opportunities for stock movements, a monte carlo simulation is used which based on the stock price movement model, the stock price movement model is influenced by the latest stock price and brown geometry motion 100 times and 10000 times simulation for 10 days of stock trading. Based on the results of the simulation analysis, the average share price was Rp. 916 - Rp. 23000, the value of forecasting accuracy namely very good forecasting accuracy with an average error of less than 10%. Companies that have increased opportunities for 10 trading days in February 2022 are CPIN.JK, INCO.JK, INKP.JK, and TBIG.JK.]]>
