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All Journal Desimal: Jurnal Matematika BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Buguh: Jurnal Pengabdian Kepada Masyarakat Journal of Mathematics: Theory and Applications Transcendent Journal of Mathematics and Applications
Zakaria, La
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Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Social Sciences Transportation

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PELATIHAN STATISTIKA DESKRIPTIF UNTUK DATA ADMINISTRATIF DI KECAMATAN TELUK BETUNG BARAT KOTA BANDAR LAMPUNG Herawati, Netti; Nisa, khoirin; saidi, subian; Sutrisno, Agus; Azis, Dorrah; Zakaria, La
BUGUH: JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 4 No. 1 (2024): Maret 2024
Publisher : Badan Pelaksana Kuliah Kerja Nyata Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/buguh.v4n1.2299

Abstract

Data administratif merupakan kumpulan data yang memiliki sifat nyata tentang sesuatu yang dianggap penting dan disimpan secara sistematis dalam sebuah sistem untuk mendapatkan suatu informasi tentang suatu hal yang berhubungan dalam ruang lingkup tertentu. Catatan administrasi dijaga untuk mendisiplinkan arah barang dan informasi dan dapat digunakan untuk tujuan pengambilan keputusan tertentu, sehingga adanya satuan identitas yang memiliki kesesuaian dengan catatan tertentu sangat penting. Untuk itu, perlu dilakukan analisis terhadap data yang sudah diperoleh agar agar masyarakat dapat melihat gambaran jelas terkait data yang diperoleh dan juga memudahkan perangkat daerah untuk mengambil keputusan terkait kebijakan yang akan diambil. Oleh karena itu akan dilakukan pelatihan dan sosialisasi terkait pelatihan analisis data deskriptif bagi perangkat daerah di kecamatan teluk betung barat kota bandar lampung. Sehingga diharapkan kedepannya gambaran terkait data dapat dipublikasikan dalam bentuk yang mudah untuk dipahami yaitu dengan statistika deskriptif.
Pelatihan Pembuatan Database Administrasi Kelurahan Bagi Operator dan Sekretaris Kelurahan Se Kecamatan Metro Utara Aziz, Dorrah; Sutrisno, Agus; Zakaria, La; Herawati, Netti
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 5 No. 2 (2024)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v5i2.165

Abstract

Kegiatan penataan administrasi desa/kelurahan merupakan salah satu hal yang penting dalam pelaksanaan administrasi. Selama ini proses pencatatan dan perubahan data administrasi sudah menggunakan MS Excel, tetapi pelaksanaannya masih secara manual dengan mencari data satu persatu. Dengan jumlah rata-rata penduduk per desa/per kelurahan yang relatif banyak, pelaksanaan tugas kearsipan menjadi tidak cepat dan tidak rapi. Pengabdian ini menerapkan program MS Office yang telah dibuat untuk dapat dimanfaatkan dalam manajemen data administrasi kelurahan. Sehingga database administrasi desa/kelurahan tertata dan mudah untuk diakses. Metode kegiatan pelatihan yang digunakan adalah metode ceramah, praktek langsung dengan file yang sudah diprogram, tanya jawab, diskusi dan praktik pengisian form yang sudah di program. Setelah dilakukan pelatihan, diperoleh database administrasi kelurahan yang tertata dan mudah untuk diakses. Kesimpulan dari kegiatan ini operator administrasi merasa terbantu dan mudah dalam mencari data sehingga pelayanan menjadi lebih cepat.
Design 3D Wallpaper Motifs from Sierpinski Carpet Fractals Using Mathematica Applications Kediangan, Ilham Vanka Agustiawan; Zakaria, La; Sutrisno, Agus
Journal of Mathematics: Theory and Applications Vol 6 No 2 (2024)
Publisher : Program Studi Matematika Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/jomta.v6i2.3569

Abstract

The development of geometric studies is very rapid, including fractal geometry. A fractal is a geometric shape that fulfills the properties of the fractal dimension. If you look at a fractal at first glance, it has an irregular shape, but if you look further, there is a regularity. One of the properties of fractals is self-similarity which occurs when a fractal is enlarged. The fractal form has a pattern obtained from iterating a function with infinite repetition. Among the fractal shapes there is the Sierpinski carpet shape. Fractals in 2D form can be transformed using geometric concepts into 3D fractals. Fractal shapes can be applied for cultural development, namely to form wallpaper motifs. Fractal geometric motifs are obtained from iterating a function with the help of Wolframe Mathematica.
SOLUTION OF FULLY FUZZY NONLINEAR EQUATION SYSTEMS USING GENETIC ALGORITHM Fatimatuzzahra, Fatimatuzzahra; Nuryaman, Aang; Zakaria, La; Sutrisno, Agus
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 19 No 2 (2025): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol19iss2pp1169-1178

Abstract

A system of nonlinear equations is a collection of several interrelated non-linear equations. Currently, systems of nonlinear equations are used not only on crisp but also on fuzzy numbers. A fuzzy number is an ordered pair function that has a degree of membership [0,1]. Meanwhile, a fully fuzzy system of equations is a system of equations that applies fuzzy number arithmetic operations. The solution of non-linear equation systems is usually complicated to solve analytically, so numerical methods are used as an alternative to solve these problems. In this research, the steps to find the solution of nonlinear fully fuzzy equation systems using genetic algorithms are studied, which in the solution process is based on the theory of evolution and natural selection. The solution steps taken are first converting the fully fuzzy system of equations into a system of crisp equations, next constructing the system of strict equations as a multi-objective optimization problem, and lastly solving the optimization problem using a genetic algorithm which includes initialization, evaluation, selection, crossover, and mutation. As illustrations, several cases of nonlinear fully fuzzy and dual fully fuzzy systems of equations on triangular fuzzy numbers and trapezoidal fuzzy numbers are given. The approximate solutions obtained using genetic algorithms produce solutions that are close to their analytic solutions.
Efficiency Analysis of Self-Estimated Pricing at PTPN I Regional 7 Using a Multi-Channel Model Prasetiyo, Muhammad Khoirul; Zakaria, La
Transcendent Journal of Mathematics and Applications Vol 4, No 1 (2025)
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/tjoma.v4i1.45965

Abstract

This study analyzes the efficiency of the Self-Estimate Price (HPS) process in the Analysis and Finance Division of PT Perkebunan Nusantara I Regional 7 after the organizational restructuring in April 2024. The restructuring led to the separation of PT Perkebunan Nusantara I and IV Regional 7, affecting the number of staff handling the HPS process. The research uses the Multi-Channel Single-Phase queuing model with Poisson arrival distribution and exponential service time, based on data collected from April to December 2024. Unlike previous studies using data before the restructuring and involving three servers (Dita Arfi, 2024), this study focuses on two servers in the new organizational context. The results show significant inefficiencies, including a system utilization rate of 0.8, a probability of no customers in the system of 11.1%, and an average queue length of 2.84 packages. Additionally, the average waiting time in the queue is 5 days, and the total time in the system is 8 days. The study concludes that workload imbalance and limited human resources are the leading causes of inefficiency, and recommends redistributing tasks or adding staff to improve efficiency. This research provides a new perspective on post-restructuring efficiency.
Modified Lorenz Curve and Its Computation Saidi, Subian; Muharramah, Ulfah; Zakaria, La; Mariska, Yomi; Ruby, Triyono
Desimal: Jurnal Matematika Vol. 3 No. 2 (2020): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v3i2.5871

Abstract

The Lorenz curve is generally used to find out the inequality of income distribution. Mathematically a standard form of the Lorenz curve can be modified with the aim of simplicity of its symmetric analysis and calculation of the Gini coefficient that usually accompanies it. One way to modify the shape of the Lorenz curve without losing its characteristics but is simple in the analysis of geometric shapes is through a transformation (rotation). To be efficient and effective in computing and analyzing a Lorenz curve it is necessary to consider using computer software. In this article, in addition to describing the development of the concept of using transformations (rotations) of the standard Lorenz curve in an easy-to-do form, the symmetric analysis is also described by computational techniques using Mathematica® software. From the results of the application of the development of the concept of the Lorenz curve which is carried out on a data gives a simpler picture of the computational process with relatively similar computational results.
The relationship of the formulas for the number of connected vertices labeled graphs with order five and order six without loops Amanto, Amanto; Notiragayu, Notiragayu; Zakaria, La; Wamiliana, Wamiliana
Desimal: Jurnal Matematika Vol. 4 No. 3 (2021): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v4i3.10006

Abstract

Given a graph with n points and m lines. If each vertex is labeled, then it can be constructed many graphs, connected, or disconnected graphs. A graph G is called a connected graph if there is at least one path that connects a pair of vertices in G. In addition, the graph formed may be simple or not simple. A simple graph is a graph that does not contain loops or parallel lines. A loop is a line that connects a point to itself, and a parallel line is two or more lines that connect the same pair of points. This paper will discuss the relationship between the formula patterns for calculating the number of connected graphs labeled with vertices of order five and six without loops.
An Analysis Genotype Inheritance in a Trihybrid Cross by Applying a Diagonalization of Matrix Method Azis, Dorrah; Syanur, Marsela Nuvela; Amanto, Amanto; Zakaria, La
Desimal: Jurnal Matematika Vol. 5 No. 3 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i3.11955

Abstract

This research aimed to find out the formulation of inheritance to know the genotype of the n-th generation in trihybrid crosses with controlled parent genotypes and analyze them by applying the diagonalization of a matrix. Matrix diagonalization makes it easier to find out the inheritance genotype of the n-th generation in trihybrid to obtain superior offspring compared with crossing it one by one, which requires a lot of time and cost. Based on the analysis, an equation for the probability of inheritance was obtained for 27 genotypes of the n-th generation, and the resulting offspring in an infinite generation are likely to have the TTKKBB genotype.
THE DEVELOPMENT OF COVID-19 USING OUTBREAK THE SUSCEPTIBLE, INFECTED, AND RECOVERED (SIR) MODEL WITH VACCINATION Azis, Dorrah; Zakaria, La; Ruby, Tiryono; Arifaldi, Muhammad Is’ad
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 17 No 3 (2023): BAREKENG: Journal of Mathematics and Its Applications
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol17iss3pp1325-1340

Abstract

The Covid-19 pandemic in 2020 has caused severe problems in Indonesia. The Covid-19 virus epidemic can be modeled using the Susceptible, Infected, and Recovered (SIR) model. This modeling aims to look at the dynamics of Covid-19 to predict when disease-free and endemic disease occurs and to find the basic reproduction number ( ) for policy making in suppressing the spread of Covid-19. In this article, we describe and solve a research result on the SIR model with an assumption. The assumption in the model is that there is vaccination for the population. There are live stages of research conducted. The first is creating the SIR model and determining the equilibrium points on disease-free and disease-endemic. The Second is getting the basic reproduction number. The third is determining the stability around the equilibrium points using the Routh-Hurwitz criteria. Fourth, create a diagram for the subpopulations state at a specific time using Wolfram Mathematica software. As an implementation of the model created, COVID-19 data at the Batanghari Community Health Center Inpatient UPTD was used. Finally, determine the model error percentage with MAPE. The SIR Covid-19 model was made using eight parameters, namely , which are all positive. The results showed that the disease-free and disease-endemic equilibrium points were locally asymptotically stable after being analyzed using the Routh-Hurwitz stability criteria. The model trial using data from UPTD Puskesmas Batanghari obtained a stable condition for up to 100 months with a MAPE of 2.8%. From this study, obtained an . This means that if you want to reduce the rate of spread, then reduce the number of people who are easily infected ( ) and reduce contacts ( ), and increase the healing rate ( ).
SAWI TRANSFORMATION FOR SOLVING A SYSTEM OF LINEAR ORDINARY DIFFERENTIAL EQUATIONS Halim, Elvina; Zakaria, La
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 17 No 4 (2023): BAREKENG: Journal of Mathematics and Its Applications
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol17iss4pp2171-2186

Abstract

There are many problems in nature whose solutions are obtained through mathematical concepts. One of the most common mathematical concepts is a mathematical concept that is classified under initial value problems, such as a system of linear ordinary differential equations equipped with initial values. One tool that can solve the initial value problem is the Sawi transformation. This article describes the study of the initial value problem as a system of linear ordinary differential equations and its solution using the Sawi transformation. In addition, as part of applying the resulting theory, 2 (two) case examples are given (a first-order chemical reaction system with three certain chemicals and a mass-spring system with forced motion) to be solved using the Sawi transformation. So that problem solving can be interpreted and easily understood, in the 2 (two) case studies discussed and focused on the concentration of the chemical reactants, simulations were carried out for several different initial values and reaction rate constants. Compared to other methods (Laplace transform), the results obtained from using the Sawi transformation for the cases discussed show that the analytical solutions for the selected initial values have similar solutions.
Co-Authors Aang Nuryaman Al Mahkya, Prana Amanto Amanto Arifaldi, Muhammad Is’ad Azis, Dorrah Aziz, Dorrah Fatimatuzzahra Fatimatuzzahra Halim, Elvina Kediangan, Ilham Vanka Agustiawan Khoirin Nisa Mariska, Yomi Muhammad Luthfi Muharramah, Ulfah Notiragayu, Notiragayu Prasetiyo, Muhammad Khoirul Ruby, Tiryono Ruby, Triyono Saidi, Subian Sutrisno, Agus Syanur, Marsela Nuvela Wamiliana Wamiliana