cover
Article Per Year (5 Year)
All
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
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 404 Documents
 37   38   39   40   41 
Optimasi Penugasan Mekanik Menggunakan Modified Hungrian Method Pada Dealer Toyota Auto 2000 Padang Defitri, Fanessa Elrika; Winanda, Rara Sandhy
Journal of Mathematics UNP Vol 9, No 4 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i4.16769

Abstract

Auto 2000 Padang memiliki target layanan servis kendaraan sebanyak 1.225 unit per bulan dalam 25 hari kerja dengan 14 mekanik dan 8 jenis pekerjaan. Namun, rata-rata capaian servis bulanan pada tahun 2023 hanya mencapai 859 unit, sehingga diperlukan penugasan mekanik yang optimal agar target tercapai. Penelitian ini menerapkan Modified Hungarian Method untuk menyelesaikan masalah penugasan yang tidak seimbang karena jumlah mekanik tidak sama dengan jumlah jenis pekerjaan. Metode ini mengoptimalkan penempatan tugas dengan mempertimbangkan efisiensi waktu kerja setiap mekanik untuk meningkatkan produktivitas. Hasil penelitian menunjukkan bahwa penerapan metode ini mampu meningkatkan jumlah unit servis menjadi 1.359 unit per bulan, melampaui target yang ditetapkan. Hasil ini menunjukkan bahwa pengoptimalan penugasan menggunakan Modified Hungarian Method dapat meningkatkan efisiensi kerja mekanik.
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 Prestasi Atlet PPLP Sumatera Barat Menggunakan Analisis Jalur Charles, Denisha Aprilia
Journal of Mathematics UNP Vol 10, No 1 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i1.17070

Abstract

The West Sumatra Student Sport Education and Training Center serves as a training ground and coaching facility to improve sport achievement in West Sumatra. Athletes accomplishments are influenced by a wide range of elements, such as their passions, skills, families, environments, coaches, and motivation. The purpose of this research is to determine the factors direct and indirect influences. This study is an applied one that uses 111 participants as its sample and primary data. The results of the path analysis show that athlete achievement is directly influenced by the variables of physical quality (X1) and motivation variables (X6) . Indirectly, athlete achievement is influenced by the variables of the social environment (X2), athlete character (X3) through the variables of athlete physical quality (X1) , and the variables of the social environment (X2) , perception of the coach (X5) through the variable of athlete motivation (X6). In total, the achievement of athletes in PPLP West Sumatra is influenced by the variables of physical condition (X1) , motivation (X6), social environment (X2), athlete character (X3), and perception of the coach (X5).
Peramalan Jumlah Produksi Daging Sapi di Kabupaten Pesisir Selatan Menggunakan Metode Pemulusan Eksponensial Triple Tipe Brown Pratama, Agung Putra
Journal of Mathematics UNP Vol 10, No 2 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i2.17174

Abstract

Beef is one of the sources of animal protein that has an important role in meeting the nutritional needs of the community. Beef production in South Coast Regency fluctuates every year, so an accurate forecasting method is needed to anticipate future production changes. This study aims to forecast the amount of beef production in Pesisir Selatan Regency using the Brown Type Exponential Smoothing method. The data used is secondary data from the Central Statistics Agency of South Pesisir Regency during the period 2006-2023. The results of the analysis show that the value of the optimal smoothing parameter is , with the smallest Mean Squared Error (MSE) value of 975,204,883,902. Based on the models obtained, the forecast results of beef production for 2024 to 2027 are 1,978,643 kg, 1,767,060 kg, 1,537,595 kg, and 1,290,248 kg.
PEMODELAN MATEMATIKA PADA PENGELOLAAN PERIKANAN TERBARUKAN Susilawati, Nani
Journal of Mathematics UNP Vol 10, No 2 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i2.12610

Abstract

Fisheries are natural resources that can be renewed (renewable) but are limited. The current state of fisheries is threatened with extinction due to overexploitation. Therefore, a mathematical model was created. The purpose of this study was to determine the form of a mathematical model in renewable fisheries management and to interpret the results of the analysis of the model. This research is a basic or theoretical research. This model is in the form of a non-linear system of differential equations. This model studies the dynamics between two components, namely tiger prawns (prey) and populations consuming prey species as alternative food (predators) with two areas, namely protected areas and unprotected areas. This model uses the Holling II response function and the logistic growth model. From the analysis of the model, there are three equilibrium points, which are local asymptotically stable.
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.
Peramalan Produksi Padi Di Provinsi Sumatera Barat dengan Metode LSTM Yanata, Dwiki Dzakwan; Helma, Helma
Journal of Mathematics UNP Vol 10, No 1 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i1.16977

Abstract

The occurrence of rice surplus in West Sumatra Province, makes this province has the potential to become a rice exporting area without reducing local stocks. This research aims to forecast rice production using the LSTM method, which excels in time series data analysis. This research uses secondary data in the form of monthly rice production in West Sumatra from 2009 to 2023 obtained from the Agriculture Office of West Sumatra Province. The process involves data processing, division of the dataset into training and testing data, and construction of the LSTM model. The model is designed to recognize patterns and trends in rice paddy production. The forecasting results show a range of paddy production between 177,038 to 185,343 tons with a MAPE value of 10%, which indicates a good level of accuracy.
Estimasi Pengukuran Risiko Menggunakan Metode Conditional Value At Risk Pada Investasi Saham Indonesia Dengan Pendekatan Generalized Pareto Distribution Izamahendra, Yusril
Journal of Mathematics UNP Vol 10, No 2 (2025): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v10i2.17350

Abstract

Conditional Value at Risk (CVaR) merupakan perkiraan risiko kerugian yang melebihi tingkat Value at Risk (VaR). VaR adalah salah satu metode pengukuran risiko saham yang paling umum digunakan untuk menilai risiko investasi besar. Extreme Value Theory (EVT) adalah metode yang digunakan untuk menganalisis data yang mengandung nilai ekstrim. Tujuan EVT adalah memperkirakan kemungkinan terjadinya peristiwa ekstrem dengan memeriksa ujung distribusi berdasarkan nilai ekstrim yang diamati. Salah satu distribusi umum yang digunakan dalam EVT yaitu Generalized Pareto Distribution (GPD). Penelitian ini bertujuan untuk mengetahui perkiraan tingkat kerugian yang mungkin dialami investor ketika berinvestasi pada portofolio saham yang terdiri dari saham ADRO. JK, ITMG.JK, DAN BMRI.JK. Pada penelitian ini metode L-Moment diterapkan untuk mengestimasi parameter GPD. Berdasarkan analisis CVaR menggunakan pendekatan GPDP didapatkan estimasi kerugian portofolio saham sebesar 4,353%. Berdasarkan uji bactesting untuk mengentahui validas resiko didapatkan    nilai chi-square yang berarti hasil risiko yang didapatkan valid.
Faktor-Faktor yang Mempengaruhi Hipertensi pada Ibu Hamil Rumah Sakit Bhayangkara Menggunakan Analisis Faktor Ramadhani, Cindy Aulya; Helma, Helma Helma
Journal of Mathematics UNP Vol 9, No 4 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i4.16825

Abstract

Hypelrtelnsion is a condition of blood prelssurel that increlasels continuously against blood velssells. Hypelrtelnsion is a major helalth problelm worldwidel. Hypelrtelnsion in prelgnancy is common, and has othelr selrious elffelcts during childbirth. This study aims to deltelrminel thel factors that influelncel hypelrtelnsion in prelgnant womeln patielnts at Bhayangkara Hospital Padang. Thel data useld arel primary data using a quelstionnairel containing a numbelr of structureld writteln quelstions to obtain relspondelnt information. This study usels thel Factor Analysis melthod. Thel variablels arel Agel, Body Mass Indelx, Food Intakel, Meldication Compliancel, Physical Activity, Strelss, History of Hypelrtelnsion and Parity. Thel relsults of this study indicatel that thel factors that influelncel hypelrtelnsion in prelgnant womeln consist of threlel factors, namelly, thel first factor is built by agel, body mass indelx. Thel selcond factor consists of compliancel with taking meldication, food intakel. Thel third factor consists of parity, strelss and history of hypelrtelnsion.
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. 

Page 40 of 41 | Total Record : 404

 37   38   39   40   41 

Filter by Year

2014 2025


Reset
Filter By Issues
All Issue Vol 10, No 2 (2025): Journal Of Mathematics UNP Vol 10, No 1 (2025): Journal Of Mathematics UNP Vol 9, No 4 (2024): Journal Of Mathematics UNP Vol 9, No 3 (2024): Journal Of Mathematics UNP Vol 9, No 2 (2024): Journal Of Mathematics UNP Vol 9, No 1 (2024): Journal Of Mathematics UNP Vol 8, No 4 (2023): Journal Of Mathematics UNP Vol 8, No 3 (2023): Journal Of Mathematics UNP Vol 8, No 2 (2023): Journal Of Mathematics UNP Vol 8, No 1 (2023): Journal Of Mathematics UNP Vol 7, No 4 (2022): Journal Of Mathematics UNP Vol 7, No 3 (2022): Journal Of Mathematics UNP Vol 7, No 2 (2022): Journal Of Mathematics UNP Vol 7, No 1 (2022): Journal Of Mathematics UNP Vol 6, No 4 (2021): Journal Of Mathematics UNP Vol 6, No 3 (2021): Journal Of Mathematics UNP Vol 6, No 2 (2021): Journal Of Mathematics UNP Vol 6, No 1 (2021): Journal Of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP Vol 5, No 3 (2020): Journal Of Mathematics UNP Vol 5, No 2 (2020): Journal Of Mathematics UNP Vol 5, No 1 (2020): Journal Of Mathematics UNP Vol 4, No 4 (2019): Journal Of Mathematics UNP Vol 4, No 3 (2019): Journal Of Mathematics UNP Vol 4, No 2 (2019): Journal Of Mathematics UNP Vol 4, No 1 (2019): Journal Of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP Vol 3, No 1 (2018): Journal Of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP More Issue