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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
Core Subject : Science, Education,
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.
Articles 15 Documents
Search results for , issue "Vol 2, No 1 (2014): Journal Of Mathematics UNP" : 15 Documents clear
Penerapan Metode Analytical Hierarchy Process dalam Analisis Profil Badan Usaha Milik Negara Tempat Kerja bagi Lulusan Program Studi Matematika Suci Rizka Welza Putri; Minora Longgom Nasution; Muhammad Subhan
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (476.875 KB) | DOI: 10.24036/unpjomath.v2i1.1962

Abstract

Abstract The goal of this research is to know about main criteria that is considered by the graduate of Mathematics Study Program, Faculty of Mathematics and Science, State University of Padang in choosing a job in Badan Usaha Milik Negara (BUMN) using Analytical Hierarchy Process (AHP) method. The data is collected from opinion of respondents which is the September 2012 period graduates in pairwise comparison questionnaire form using Saaty’s scale (1-9). The main result of this research is the graduate is more consider about their carrier in the future (31,2%) in the BUMN Persero that they choose, then followed bysalary, image and placement. Then the other one shows that Pertamina (34,5%) is  the first priority as a job choice, followed by Perusahaan Listrik Negara, Telkom, Garuda Indonesia, Bank Tabungan Negara, Pos Indonesia, Asuransi Jasa Raharja, and the last one is Pembangunan Perumahan. Keywords Analytical Hierarchy Process, priority, job choice
Penyelesaian Sistem Persamaan Linear pada Aljabar Max-Plus Cindi Meidisia; Yusmet Rizal; Helma Helma
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.224 KB) | DOI: 10.24036/unpjomath.v2i1.1953

Abstract

 
Model Mangsa Pemangsa dengan Pengaruh Musim yudi Arpa; Muhammad Subhan; Riry Sriningsih
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.456 KB) | DOI: 10.24036/unpjomath.v2i1.1967

Abstract

Abstract- Effect of season  is one of the factors that need to be noted in the predation. In this study, used the four seasons, summer, winter, spring, and autumn, where the amount of predation different every season. The study began by establishing a mathematical model of predation to the effect of the season. In this model, the population is divided into two, prey populations and predator populations. With useful analysis model using perturbation theory note that the effect of the season had a significant effect on the growth patterns of prey and predator populations, where at any given time pattern of prey and predator population  Growth  Is  changing. Keyword :Predator-Prey, Seasonal effect, Mathematical models, Perturbation theory.
Model Matematika Kerusakan Sumber Daya Hutan di Indonesia Nur Suci; Arnellis Arnellis; Media Rosha
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.2 KB) | DOI: 10.24036/unpjomath.v2i1.1958

Abstract

Abstract – The Degradation of forestry resources is a serious problem is faced by Indonesian country.  The growth of  population people  and augment industrialization in Indonesia gave a negative effect to forestry resources. Its happen if the utilization continuously without preservation. The purpose of this study is to see the dynamic degradation of forestry resources that can be done by modeling the influence population growth and augment industrialization to forestry resources in the form of a mathematical model.  The form of mathematical models equations a non-linear differential equations system. Furthermore Mathematical model that we get be analysised and the result is interprestationed to answer the problem. According the analysis of mathematical model dynamics degradation of forestry resources in Indonesia is gotten by two types of fixed point; fixed point  interference free ( ) and fixed point interference ( and ), and then we get obtained the stability of each fixed.   Keywords – Degradation of Forestry, Industrialization, Mathematical  Models, Population People Stability.
Peramalan Kebutuhan Energi Jual pada PT Perusahaan Listrik Negara (PLN) Cabang Bukittinggi dengan Menggunakan Metode Dekomposisi Sensus Ii Sujantri Wahyuni; Helma Helma; Nonong Amalita
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.626 KB) | DOI: 10.24036/unpjomath.v2i1.1963

Abstract

Abstract -- Indonesia’s electrical are managed by PT.PLN. To increase distribution service of electric in all of area. PT PLN could forecast necessity of sell energy, so that could planning energy will be distribution based result of forecasting. Pattern of sell energy is seasonal pattern. Decomposition census II is realiable for seasonal pattern. This research study about how much necessity of sell energy for 12-monthly by decomposition census II ? The result based description of data and analisis of data are necessity of sell energy is between 28.537.128 until 33.359.590   Keywords: forecast, Decomposition census II, necessity of sell energy
Model Matematika Jumlah Pemakai Narkoba dengan Program Rehabilitasi Eli Yuliza; Media Rosha; Riry Sriningsih
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (154.315 KB) | DOI: 10.24036/unpjomath.v2i1.1954

Abstract

Abstract–In the number of drug users in Indonesia each year has increased very significantly, so this problem should be addressed immediately.Currently, the government has organized rehabilitation program that is expected to reduce the number of drug users in the future. To predict the number of drug users, can be done by creating a mathematical model of the number of drug users. Mathematical model number of drug users in rehabilitation programs dividing the population into four groups of individuals: the group of susceptible individuals for drug use, drug user groups of individuals, groups of individuals are rehabilitated, and a group of individuals who have stopped using drugs. Mathematical model that formed were analyzed by looking at the stability, the analysis of mathematical models obtained two types of fixed points. In the number of drug users is affected by four parameters: the level of interaction between individuals prone to drug use by individual drug users, the level of individual drug users to be individuals who stop using drugs, and individual level drug offenders to be rehabilitated individuals.   Keywords–Drugs, mathematical model, fixed point.
Faktor-faktor yang Mempengaruhi Jumlah Kelahiran di Provinsi Sumatera Barat dengan Menggunakan Analisis Faktor Resti Febrina; Nonong Amalita; Dewi Murni
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626 KB) | DOI: 10.24036/unpjomath.v2i1.1959

Abstract

Abstract –– The Problem of birth is one of the unresolved issues in West Sumatra. The birth rate in western Sumatra in the high category, where a mother gives birth to an average of three to four childrens. Increasing the number of births means that population growth will affect the welfare of society. It required effort to see birth control factors affecting birth. To find out which factors that affect the number of births in the province of West Sumatra is used by factor analysis. Base on the results obtained the data analysis three factors that affect the number of births in the province of West Sumatra that women with low education or undergraduate, women who married at the end of adolescence, and women who are married under-age and use contraceptive.   Keywords –– Factor analysis, Problem of birth, and Number of birth.
Faktor-Faktor yang Mencirikan Kondisi Financial Distress Pasca Kenaikan BBM Perusahaan Manufaktur di BEI Menggunakan Analisis Biplot Venny Oktarinda; Syafriandi Syafriandi; Nonong Amalita
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.413 KB) | DOI: 10.24036/unpjomath.v2i1.1964

Abstract

Abstract Financial distress is  situation where financial condition  company in crisis. Prices increasis BBM is one of the external factors cause occurrence of financial distress. So that company can overcome problem of financial distress, it’s necessary know factors that characterize financial condition by financial ratios of manufacturing companies on Indonesian  Stock  Exchange before and after increase  prices BBM using biplot analysis. Biplot results indicate that factors characterize company condition good company prior to the rise in fuel prices is value of CR, DER, and ROE above average and value TATO is below average. After the occurrence of  condition of  fuel price hike company declined to cash flow problems and deterioration. Company's cash flow problems on condition characterized by value of CR above average and of DER, TATO, and ROE is below average. Company on condition characterized by deterioration DER values ​​were above average, value CR, TATO, and ROE is below average.   Keywords financial distress, financial ratios, biplot analysis
Model Matematika Populasi Plankton dan Konsentrasi Nitrogen Elvi Silvia; Yarman Yarman; Muhammad Subhan
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (107.539 KB) | DOI: 10.24036/unpjomath.v2i1.1955

Abstract

Abstract – Phytoplankton and zooplankton have a major impact on the marine ecosystem because plankton is the main food chain in the ecosystem. However, this plankton’s concentration changes is influenced by nitrogen concentrations. This study began by making mathematical model based on the variables , parameters and assumptions that have been determined. Next step are finding and analyze an equilibrium point. Mathematical model in plankton populations and nitrogen concentration in the form of non-liner differential equation system. This dinamical system have two equilibrium points ie the points where nitrogen without plankton and the point where nitrogen and plankton. The stability of the system can be viewed from two condition, first when the system has one point where nitrogen without planktonthen this point will be stable. Second, when the system have two equilibrium points then only point where nitrogen and plankton will be stable. This result show that population of phytoplankton, zooplankton and nitrogen concentration will not disappear in the long term. Keywords – Nitrogen, plankton, mathematical model
Penyelesaian Sistem Persamaan Linear (SPL) Dengan Dekomposisi QR Shelvia Mandasari; Muhammad Subhan; Meira Parma Dewi
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.813 KB) | DOI: 10.24036/unpjomath.v2i1.1960

Abstract

Abstract – QR decomposition is a numerical method to solves a System Linear Equations with n equations and n variables. This decomposition obtained by Gram Schimdt process and inner product space. From that method make an algorithm, that has been made  a computer  program to solve that System Linear Equations with n equations and n variables. The solution that obtained by this decomposition more accurate with small errors because this method only use two process so this decomposition more effective than that other numerical method. Keywords -- Inner Product Space, Gram Schmidt Process, QR Decomposition

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