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Journal of Mathematics UNP
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 8 Documents
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Search results for , issue "Vol 9, No 3 (2024): Journal Of Mathematics UNP" : 8 Documents clear
Faktor-Faktor Yang Mempengaruhi Produksi Salak Mangguang Menggunakan Analisis Regresi Linear Berganda Wahyuni, Putri; Winanda, Rara Sandhy
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16676

Abstract

The center of snake fruit mangguang recency is in Kenagarian Tanjung Beringin. Mangguang salak production fluctuates every year. From 2019-2022, snake fruit production has decreased, which has an impact on the economy of the people in the area. The aim of this research is to identify factors that have a significant influence on the production of Mangguang salak in Pasaman Regency. The analysis used is multiple linear regression analysis. From the research results, the factors that most significantly influence the production of mangguang salak are the number of clumps and pruning with an error rate of 5%.
Penentuan Akar Persamaan Non Linier Menggunakan Metode Iterasi Tanpa Menghitung Turunan yang Lebih Tinggi Olpelda, Danisa Alzura; Subhan, Muhammad
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16230

Abstract

The iteration method without calculating higher derivatives is one of the numerical methods which is included in the group of open methods. This iteration method is derived based on the third truncated Thiele’s continuous fraction. To avoid calculating higher derivatives, an approximation of the second and third derivatives is used in determining the roots. This research aims to determine the roots of non-linear equations using the iteration method without calculating higher derivatives. This type of research is basic research. Based on the discussion results, it was found that the iteration method without calculating higher derivatives uses two-step in determining the root. The convergence analysis shows that the iteration method without calculating higher derivatives has a convergence order of four. The algorithm of the iteration method without calculating higher derivatives is shown in the form of a flowchart.Keywords: Non-linear equation, Thiele’s continued fraction, Viscovatov algorithm, iterative method, order of convergence
Optimasi Keuntungan Industri Bolu Malin Kundang dengan Metode Algoritma Titik Interior Putri, Utari Mutia
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16681

Abstract

Bolu Malin Kundang merupakan salah satu oleh-oleh khas dari Kota Padang. Industri ini masih mengalami kendala dalam produksi optimal. Penelitian ini bertujuan untuk mengetahui hasil optimasi keuntungan pada Bolu Malin Kundang dengan menggunakan metode algoritma titik interior. Berdasarkan hasil penelitian dengan menggunakan algoritma titik interior diperoleh keuntungan pada Bolu Malin Kundang sebesar Rp 112.831.757,4 dengan memproduksi bolu kukus blackforest sebanyak 550 box, bolu kukus cokelat sebanyak 1.600 box, bolu kukus oreo sebanyak 636 box, bolu kukus pandan sebanyak 1.500 box, bolu kukus talas sebanyak 400 box, bolu kukus sanjai sebanyak 500 box, bolu kukus pisang sebanyak 300 box, brownies panggang kombi sebanyak 4.200 box, brownies panggang keju sebanyak 1.788 box, balok lumer sebanyak 1.084 box. Sedangkan keuntungan rata-rata yang diperoleh Bolu Malin Kundang sebesar Rp 85.293.763,66. Maka terdapat selisih antara keuntungan yang diperoleh Bolu Malin Kundang dan keuntungan dengan menggunakan metode algoritma titik interior adalah sebesar Rp 27.537.993,74.
Peramalan Jumlah Penerbitan Surat Izin Mengemudi Berjenis C di Satlantas Polresta Padang dengan Menggunakan Metode ARIMA Yeni, Annisa Septi
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16324

Abstract

A driving license (SIM) is an important indicator of traffic planning and management in a given area. Therefore, we will forecast the number of C-SIMs issued in the future to help the Polri agency plan traffic policy authority, allocate power resources, and manage infrastructure effectively. The study aims to apply the ARIMA methodology in analyzing and predicting the number of C-IDs issued for the period from July 2024 to June 2025. The study utilizes historical data on the number of C-SIMs issued from January 2019 to June 2024. The results showed that the ARIMA (1,1,1) model produced a prediction of the number of SIM C issuances at the Padang Police Traffic Unit for the period July 2024 to June 2025, with the estimated number ranging from 1900 to 1578.
Penggunaan Metode Fuzzy Tsukamoto untuk Menelaah Tingkat Kepuasan Pengunjung Taman Panorama Baru di Bukittinggi Melalui Pengambilan Keputusan Shiddiq, Hanifah
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16700

Abstract

Pariwisata merupakan sektor penting yang dapat meningkatkan pendapatan daerah dan kesejahteraan masyarakat. Kota Bukittinggi, dengan berbagai daya tarik wisata alam dan budaya, memiliki potensi besar dalam sektor ini. Namun, untuk meningkatkan kepuasan pengunjung, diperlukan penilaian yang tepat. Metode Fuzzy Tsukamoto dipilih karena hasil ouput yang diberikan berupa nilai crisp. Penelitian ini bertujuan untuk mengetahui penggunaan metode Fuzzy Tsukamoto dalam menelaah tingkat kepuasan pengunjung Taman Panorama Baru di Bukittinggi. Penelitian ini dikategorikan sebagai penelitian terapan yang menggunakan data primer hasil penyebaran kuesioner online melalui google form kepada responden. Hasil analisis menunjukkan bahwa 88,54% pengunjung memiliki tingkat kepuasan tinggi dan 11,45% pengunjung memiliki tingkat kepuasan rendah, dengan faktor utama yang mempengaruhinya adalah kualitas dari fasilitas wisata taman tersebut.
Sentiment Analysis of Indonesian Presidential Candidates in the 2024 Election Using the Naïve Bayes Classifier El Hakim, Mhd Syofior Rahman
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16440

Abstract

In 2024, the people of Indonesia actively participated in the democratic process of electing a new president, vice president, and legislative members. This presidential election generated a wide range of public opinions across various social media platforms such as Twitter, Facebook, Instagram, and TikTok. These opinions were characterized by sentiments that were positive, negative, or neutral, directed toward the presidential candidates in the 2024 election. Consequently, this research was conducted to analyze the sentiment toward the presidential candidates based on data from Twitter. The data was gathered through a crawling process using Python with keywords "Anies," "Prabowo," and "Ganjar." After obtaining the data, it underwent cleaning and sentiment labeling using an Indonesian sentiment lexicon called InSet. Subsequently, sentiment classification was performed using the Naïve Bayes algorithm, yielding an average accuracy of 65.96%.
Analisis Bifurkasi pada Model Risiko Keuangan Sari, Afriana Yustika; Winanda, Rara Sandhy
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16730

Abstract

Bifurkasi adalah perubahan struktur kualitatif yang terjadi pada suatu sistem. Struktur kualitatif yang berubah dapat berupa perubahan yang terjadi pada kestabilan titik ekuilibrium. Pada penelitian ini dilakukan analisis bifurkasi pada model matematika risiko keuangan dengan variabel yang mempengaruhi suku bunga, permintaan investasi dan indeks harga. Penelitian ini bertujuan mengetahui kestabilan titik ekuilibrium dan  bifurkasi yang terjadi pada model matematika risiko keuangan. Berdasarkan hasil penelitian, diperoleh tiga titik ekuilibrium dengan titik ekuilibrium kedua tidak eksis berdasarkan sudut pandang ekonomi, sebab suku bunga bernilai negatif. Titik ekuilibrium pertama menggambarkan keadaan hanya ada permintaan investasi sedangkan suku bunga dan indeks harga tidak ada. Titik ekuilibrium pertama dapat bersifat stabil asimtotik apabila memenuhi beberapa syarat. Sedangkan titik ekuilibrium ketiga menggambarkan keadaan terjadinya inflasi atau deflasi. Titik ekuilibrium ketiga dapat bersifat stabil asimtotik berdasarkan kriteria kestabilan Routh-Hurwitz. Bifurkasi terjadi pada titik ekuilibrium pertama yang menunjukkan adanya perubahan kestabilan pada titik ekuilibrium tersebut.
Metode Iteratif Bebas Turunan Tinggi Untuk Persamaan Non Linear Fhadilah, Syafirna; Subhan, Muhammad
Journal of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i3.16669

Abstract

To find the roots of non-linear equations, numerical methods such as Newton-Raphson and Secant are often used when analytical approaches are difficult to apply. However, these methods are relatively slow due to their low convergence order. Iterative methods with higher convergence orders can speed up the process, but they often involve more complicated derivatives. To overcome this, a high derivative-free iterative method was developed using the predictor and corrector approach. This research aims to develop the method, analyze its convergence order, and develop its algorithm. This research is a theoreticalresearch by reviewing the theories related to the problem at hand. The results show that the new method has a convergence order of six, is faster than the Newton-Raphson and Secant methods in solving non-linear equations, and only involves the first derivative. 

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