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
 31   32   33   34   35 
Model Matematika Rantai Makanan Mangsa-Pemangsa Tiga Spesies dengan Adanya Ketakutan pada Mangsa dan Predator Perantara Arsya, Nadila; Subhan, Muhammad
Journal of Mathematics UNP Vol 9, No 2 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i2.15359

Abstract

A three-species prey-predator interaction is an interaction involving three species, namely the prey species, the intermediate predator and the top predator. The presence of predators can cause fear in their prey. This research aims to determine the local stability analysis of the mathematical model of the prey-prey food chain for three species in the presence of fear of intermediate prey and predators. This research is also equipped with numerical simulations that show the effects of fear on prey and intermediate predators. Based on the analysis that has been carried out, four fixed points have been obtained with their respective stability. Numerical simulations from the model show that when there is no fear of intermediate prey and predators, the population of each species shows irregular oscillations, whereas in the presence of fear of intermediate prey and predators the population stabilizes towards a fixed point . However, if the level of fear is too high for prey or intermediate predators, it will cause the population of top predators to become extinct.
MODEL MATEMATIKA KETERGANTUNGAN MASYARAKAT TERHADAP MEDIA SOSIAL Oktavia, Nanda; Rosha, Media
Journal of Mathematics UNP Vol 8, No 4 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i4.14908

Abstract

The convenience presented by social media technology leads to dependence on its users. Social media dependence has a bad impact on humans and is very dangerous for its users. Thus it is necessary to analyze how the level of dependence of society on social media. The transmission of social media dependence occurs if there is interaction between communities. The study aims to determine the level of dependence of the community on social media. This research is stated ase basic research and uses literature studies. This research begins with identifying problems, formulating mathematical models, conducting stability analysis at the point and interpreting the mathematical model. Based on the results of the analysis, this point remains free and endemic to people's dependence on social media exists and will be asymptotic stable if it meets some of the conditions of the Routh-Hurwitz criteria. Based on the simulation results, the interaction and the number of people who recover can affect the spread of dependence on social media. The spread of people's dependence on social media will be reduced if the rate of recovery is increased.
Pengendalian Kualitas Telur Ayam Pada Proses Penetasan Menggunakan Metode Grafik Kendali T^2 Hotelling Di PT Japfa Comfeed Indonesia Padang Pariaman Erawati, Sisri; Murni, Dewi
Journal of Mathematics UNP Vol 9, No 1 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i1.15091

Abstract

In Padang Pariaman there is PT Japfa Comfeed Indonesia which focuses on breeding chicken eggs. Quality monitoring conducted by the company is still limited to recording the proportion of defective eggs originating from each region. However, the company has not carried out further quality control using statistical methods. This study aims to describe the state of the eggs and see whether the quality of the chicken eggs in the hatching process at the company is under statistical control on the Hotelling control chart. This research was conducted simultaneously which consisted of three correlated variables, namely thin eggs, cracked eggs, and broken eggs. The data obtained is then processed using the  Hotelling control chart method. Based on the results of the analysis, it was found that out of the 32 observations, 2 observation points were detected that were out of control (uncontrolled) from the upper limit (BKA) of the control chart. So it can be concluded that in July 2022 to June 2023 the process was not statistically controlled.
Model Matematika Penyebaran CVEV (Citrus vein enation virus) pada Tanaman Jeruk Nipis Melalui Serangga Kutu Daun Yani, Fitri; Arnellis, Arnellis
Journal of Mathematics UNP Vol 8, No 4 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i4.14209

Abstract

Citrus vein enation virus is a virus that attacks lime plants. This virus can cause swelling of the veins of the leaf veins like clumps that are spread irregularly on the underside of the leaves resulting in decreased yields and short-lived plants. This virus is spread by aphids. This research was conducted with the aim of knowing the shape of the mathematical model for the spread of the Citrus vein enation virus and interpreting the research results from the mathematical model. This research uses basic research types and descriptive methods. From the results of the study it was found that the mathematical model of the spread of the Citrus vein enation virus was in the form of a system of differential equations and the interpretation of the model obtained 2 equilibrium points including the equilibrium point  which is asymptotically stable because it obtained  which is 0.1502685768 which means the virus can disappear within a certain time and the equilibrium point  which is asymptotically stable because it gets  which means 1.502685768 which means the virus will spread in time long.
Penerapan Metode Goal Programming Non-Preemptive dalam Mengoptimalkan Produksi Air Bersih PDAM Kota Padang Panjang Safitri, Reza Dwi; Winanda, Rara Sandhy
Journal of Mathematics UNP Vol 9, No 1 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i1.15657

Abstract

The Regional Water Supply Company of Padang Panjang is a water supply company located in the city of Padang Panjang. This company has production constraints on the amount of water that does not meet the demand for clean water by customers and the operational costs of maintaining water sources are higher during the dry season than the selling price of water to customers, which causes the company to suffer losses. The purpose of this study is to optimize the production of clean water and minimize losses at the Regional Water Supply Company of Padang Panjang. The method used in this study is Non-Preemptive Goal Programming. The results of this study found a decrease in losses at the Regional Water Supply Company of Padang Panjang, which previously amounted to IDR 174,566,828 to no longer experience losses.
Analisis Multidimensional Scaling pada Pemetaan Kabupaten/Kota di Provinsi Sumatera Barat Berdasarkan Fasilitas Kesehatan Marwiyah, Leli; Murni, Dewi
Journal of Mathematics UNP Vol 9, No 2 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i2.13638

Abstract

Health facilities are places used for organize health efforts carried out by the government, local government and the community. The existence of health facilities illustrates how the process of fulfilling health needs in an area. According to the West Sumatra provincial health office, access to health services is hampered due to the limited number of health care facilities. This research was conducted using the multidimensional scaling method. This type of research is applied research. Based on the map generated by the MDS analysis, it was found that districts/cities that have similar characteristics of health facilities are Bukittinggi City, Sawahlunto City, Pariaman City, Solok City, Payakumbuh City, Padang Panjang City, Mentawai Islands Regency, Dharmasraya Regency and Sijunjung City: Pasaman Regency, Regency of South Solok and Tanah Datar Regencies. City Districts that need to be considered for the characteristics of health facilities are Agam District and Maternity Homes. District of Fifty Cities to Hospitals, Maternity Hospitals, Special Hospitals. Tanah Datar Regency to the Clinic.
Penentuan Akar Persamaan Non Linier Menggunakan Metode Iterasi Tiga Langkah Orde Delapan Efendi, Muchni Illahi; Subhan, Muhammad
Journal of Mathematics UNP Vol 8, No 4 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i4.14999

Abstract

In determining the roots of non-linear equations can be solved analytically and numerically. Non-linear equations that are difficult to solve analytically can be solved by approaching them with numerical methods, namely the Newton method, the Ostrowski method, and the Bawazir method. However, this method is still slow in obtaining its roots because of its small convergence order. The Eighth Order Three-Step Iteration Method was formed because of the shortcomings of the existing 0methods. 0The purpose of 0this study is to examine the0 process of forming the formula of the Eighth Order Three-Step Iteration Method, develop the algorithm, and analyze the order of convergence. 0This type of research is basic research0. From the0 research results, the algorithm is used in computer programs. 0The convergence0 order 0of 0the Three-Step0Iteration0Method is eight, so this method is faster than Newton's Method, Ostrowski's Method, and Bawazir's Method.
Modifikasi Metode Fletcher-Reeves Untuk Penyelesaian Masalah Optimasi Tak Linier Tanpa Kendala Salmi, Fikri Miftahus; Subhan, Muhammad
Journal of Mathematics UNP Vol 9, No 1 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i1.15086

Abstract

In nonlinear unconstrained optimization problems, methods involving the gradient of a function are used, allowing the function’s value to increase or decrease at the fastest rate. One of the gradient-based methods is the Conjugate Gradient method, which has been extensively modified, with one of the well-known variants being the Fletcher-Reeves method. However, in many cases, the application of these methods doesn’t always achieve the correct descent direction, affecting the speed and convergence of the method, so that modifications arise due to these deficiencies. The purpose of this study is to examine the process of forming the formula of a modified Fletcher-Reeves method, develop the algorithm, and analyze the global convergence. The results of numerical simulation tests show that by selecting the appropriate  value the modified Fletcher-Reeves method converges to the global minimum solution and can find it faster than the Fletcher-Reeves method.
FAKTOR-FAKTOR YANG MEMPENGARUHI KURANGNYA MINAT MAHASISWA DEPARTEMEN MATEMATIKA UNIVERSITAS NEGERI PADANG MENGIKUTI ORGANISASI MAHASISWA MENGGUNAKAN ANALISIS FAKTOR Hidayat, Ryan; Murrni, Dewi
Journal of Mathematics UNP Vol 8, No 4 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i4.14393

Abstract

Student organizations are one of the educational shelters on campus in order to prepare students to implement their skills and knowledge in society. In this research, the purpose is to see at the factors that impact students' lack of interest in joining student organizations. This research type was applied research. The research population is Mathematics Department students of UNP class 2018-2020 who did not take part in student organizations during the July-December 2021 semester lectures. The technique for sampling used was stratified random sampling. Data obtained through the distribution of questionnaires which were analyzed using factor analysis. Our findings indicate that these factors are composed of two factors, that were, the main factor is caused by environmental, psychological, and situational variables and the second factor is caused by family and time variables
Analisis Perbandingan Metode Mean Gini dan Mean Variance dalam Pembentukan Portofolio Optimal pada Saham Perusahaan Kesehatan Dramutia, Alfika; Rosha, Media
Journal of Mathematics UNP Vol 9, No 1 (2024): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v9i1.15027

Abstract

Optimal Portofolio Formation can be done using various approaches, including the Mean Gini and Mean Variance methods.The purpose of this study is to compare the performance of theMean Gini and Mean Variance methods in the formation ofoptimal portfolios. This portfolio formation uses stock data onhealth companies on the Indonesia Stock Exchange. The timeperiod used is 2021. Portfolio performance can be determinedby assessing the Sharpe Ratio. The results of the Sharpe Ratiocomparison of the Mean Gini method have superior performancebecause the value is greater, namely 0.61. while the MeanVariance Method has a smaller Sharpe Index value of-1.38. 

Page 33 of 41 | Total Record : 404

 31   32   33   34   35 

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