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All Journal JURNAL DERIVAT: JURNAL MATEMATIKA DAN PENDIDIKAN MATEMATIKA Journal of Mathematics Education and Application (JMEA) Jurnal Sains Matematika dan Statistika JURNAL ILMIAH MATEMATIKA DAN TERAPAN Jambura Journal of Mathematics JAMBURA JOURNAL OF PROBABILITY AND STATISTICS Research in the Mathematical and Natural Sciences Islamic Economics and Finance Journal Journal of Principles Management and Bussines Journal of Mathematics, Computation and Statistics (JMATHCOS) Indonesian Journal of Computational and Applied Mathematics
Armayani Arsal
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Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Mathematics Social Sciences

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PEMODELAN STRUKTURAL EQUATION MODEL- PARTIAL LEAST SQUARE (SEM-PLS) PADA MINAT BERTRANSAKSI MENGGUNAKAN APLIKASI OVO Setia Ningsih; Hendra Dukalang; Armayani Arsal
Jambura Journal of Probability and Statistics Vol 3, No 2 (2022): Jambura Journal Of Probability and Statistics
Publisher : Department of Mathematics, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jjps.v3i2.16882

Abstract

The payment system in Indonesia is transforming from making payments in cash to non-cash. Non-cash payments can be made with various payment applications, one of which is the OVO application. Non-cash payments are less loved by many people, this is due to concerns about the security or ease and effectiveness of non-cash payment applications. Therefore, this study was conducted to analyze the factors that influence student interest in Gorontalo province in transacting using the OVO application using the Structural Equation Model Partial Least Square (SEM-PLS). The data analysis technique used is variance-based SEM. The results showed that the perceived convenience, effectiveness and security variables affected the interest in transacting using the OVO application with an R-square value of 70.70 percent.
The Influence of Consumer Behavior After COVID-19 Pandemic on Use of Digital Wallets in Gorontalo Armayani Arsal; Setia Ningsih
Jurnal Ekonomi Islam Vol 2 No 1 (2023): February 2023
Publisher : Scimadly Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55657/iefj.v2i1.111

Abstract

This research is a descriptive quantitative research type, with the aim of looking at the influence of consumer behavior during the COVID-19 pandemic on the use of digital wallets in Gorontalo. The variables used are cultural, social, personal, and psychological. The data used are primary data obtained through a questionnaire with a total of 50 respondents. The data are was processed using multiple linear regression through the Eviews program. From the results of this study it was found that personal and psychological variables had a significant influence on the dependent variable, namely the use of digital wallets. It is hoped that further researchers will be able to examine more deeply and take more samples so that the results obtained are more accurate.
Efek Literasi Keuangan Terhadap Minat Berbisnis Menggunakan Model Persamaan Struktural Least Square Parsial Setia Ningsih; Armayani Arsal
Journal of Principles Management and Business Vol. 2 No. 01 (2023): Journal of Principles Management and Bussines
Publisher : Scimadly Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55657/jpmb.v2i01.109

Abstract

The ability to manage finances can affect one's interest in entrepreneurship. With good financial conditions and knowledge of financial management can improve the business being undertaken. This study aims to determine the effect of financial literacy consisting of financial knowledge, financial behavior and financial attitude on people's interest in entrepreneurship. This research was conducted by conducting a survey of 96 respondents selected using purposive sampling technique and determining the number of samples using the Lemeshow formula. The data collection method uses a questionnaire that is distributed via the Google form. The data analysis technique used is variance-based SEM, namely SEM-PLS. The results of the study show that the variables financial knowledge, financial behavior and financial attitude have a positive and significant impact on people's interest in entrepreneurship with an R-Square value of 76.40%.
Analysis of the Availability of the Majority Quorum System Resulting from Cross Union Operations Arsal, Armayani; Setia Ningsih
JURNAL ILMIAH MATEMATIKA DAN TERAPAN Vol. 21 No. 1 (2024)
Publisher : Program Studi Matematika, Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/2540766X.2024.v21.i1.16342

Abstract

Cross union operation is an operasi to arrange a new majority coterie which we combine each quorum of another two different majority coterie. The purpose of this research is to analyse the availability comparison of quorum system between majority coterie and join majority coterie by cross union operation. By the analyse result, we know that majority coterie, which even universe set (number of element is even), has the same availability as join majority coterie which arranged by odd universe set (number of element is odd). While join majority coterie which arranged by even universe set, has relatively the same availability as majority coterie which even universe set. Finally, we conclude that the availability of majority coterie is relatively the same as join majority coterie by cross union.
Penyelesaian Persamaan Diferensial Menggunakan Metode Runge Kutta Orde Keenam Dengan Algoritma Paralel Al Fajri, Iman; Hendra; Kusuma, Jeffry; Musdalifah, Selvy; Nacong, Nasria; Sain, Hartayuni; Arsal, Armayani
JURNAL ILMIAH MATEMATIKA DAN TERAPAN Vol. 20 No. 2 (2023)
Publisher : Program Studi Matematika, Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/2540766X.2023.v20.i2.16354

Abstract

Penelitian tentang paralelisasi terus mengalami perkembangan saat ini, termasuk dalam perhitungan numerik. Pada tulisan ini akan dibahas penyelesaian persamaan diferensial menggunakan metode Runge-Kutta orde keenam dengan algoritma paralel. Makalah ini menyajikan penurunan dari metode Runge-Kutta orde keenam yang cocok untuk implementasi secara paralel. Pengembangan model paralel didasarkan pada struktur ketersebaran. Hasil perhitungan dengan model paralel kemudian akan dibandingkan dengan model sekuensial dari sisi akurasi dan waktu eksekusi. Pehitungan numerik menunjukkan bahwa metode paralel lebih mendekati solusi analitik, artinya akurasinya lebih baik. Ditinjau dari sisi waktu eksekusi, metode paralel juga memiliki keunggulan dibandingakan dengan metode sekuensial, yaitu lebih cepat.
On The Rainbow Connection Of Middle Graph Of Firecracker Graphs (F_(n,4)) Rahim, Delvira Masita; Nurwan, Nurwan; Yahya, Nisky Imansyah; Wungguli, Djihad; Arsal, Armayani
JMEA : Journal of Mathematics Education and Application Vol 4, No 1 (2025): Februari
Publisher : JMEA : Journal of Mathematics Education and Application

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/jmea.v4i1.22686

Abstract

Coloring in graph theory includes various approaches, one of which is rainbow coloring which is closely related to the concept of rainbow connected numbers which refers to the least number of colors needed to color the edges in a graph so that every two vertices connected in a rainbow path have the same color and is denoted by rc(G). Rainbow coloring can be studied in several forms of graph development, one of which is the middle graph. All types of graphs, both simple and complex, can be represented as a middle graph. A middle graph is a graph whose vertices are obtained from the vertices and edges of graph G and is denoted by V (M(G)) = V (G)∪(G). Two points in a middle graph are considered adjacent if and only if they are adjacent edges in G or one of the points is adjacent to an edge of G. In this research, we discuss the number rc(G) on the middle graph of firecracker graph (F_(n,4))  with n ≥ 2. Based on the research results, we obtain the rainbow connected number theorem on the middle graph of firecrackers graph rc(M(F_(n,4))) = 3n + 2 for n ≥ 2.
Analysis of Optimal Portfolio Formation Using Multi-Objective Optimization Method and Nadir Compromise Programming Aliwu, Randa Resvitasari; Rahmi, Emli; Nuha, Agusyarif Rezka; Yahya, Lailany; Wungguli, Djihad; Arsal, Armayani
Jambura Journal of Mathematics Vol 7, No 1: February 2025
Publisher : Department of Mathematics, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjom.v7i1.29065

Abstract

A portfolio is a collection of financial assets in the stocks owned by a company or individual. An optimal portfolio is a selected portfolio that aligns with the investor's preferences, drawn from a set of efficient portfolios that have been formed. This research aims to create an optimal portfolio using the Multi-Objective Optimization method and the Nadir Compromise Programming (NCP) method. Additionally, Value at Risk (VaR) analysis is applied to determine the maximum risk an investor will bear for the portfolio. The data used consists of closing stock prices on the IDX30 Index from February 2022 to July 2023. The findings indicate that the optimization approach produces portfolios that align with investor risk-return preferences. The comparison of Multi-Objective Optimization and NCP methods provides insights into their effectiveness in portfolio selection. Furthermore, the VaR analysis helps investors understand potential risk levels, offering a comprehensive perspective on portfolio performance.
Optimization of Interval Singh’s Fuzzy Time Series with Particle Swarm Optimization for Forecasting Consumer Price Index in Luwuk City siswanto, Navira; Djakaria, Ismail; Arsal, Armayani
Journal of Mathematics, Computations and Statistics Vol. 8 No. 1 (2025): Volume 08 Nomor 01 (April 2025)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jmathcos.v8i1.7282

Abstract

High inflation can threaten economic stability, with CPI as the main indicator to measure the inflation rate. Luwuk City experiences significant CPI fluctuations, reflecting economic uncertainty so an accurate forecasting method is needed. This research aims to apply Singh's Fuzzy Time Series (FTS) method optimised with Particle Swarm Optimization (PSO) to improve CPI forecasting accuracy. This research includes quantitative research, using secondary data obtained from monthly CPI data in Luwuk City on the official website of the Badan Pusat Statistik Kota Luwuk. The results showed that the use of PSO optimisation on Singh's FTS was able to optimise the prediction accuracy level of Singh's FTS forecasting on Luwuk City CPI data, with a MAPE value of 0.45%, where this value is less than 10% which indicates that the forecasting accuracy is very accurate.
Optimasi Persediaan Beras menggunakan Integer Linear Programming untuk Mengatasi Ketidakpastian Pasokan Studi Kasus Bulog Gorontalo Daud, Sriwati M.; Panigoro, Hasan S.; Arsal, Armayani; Wungguli, Djihad
Jurnal Sains Matematika dan Statistika Vol 11, No 2 (2025): JSMS Juli 2025
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jsms.v11i2.36254

Abstract

Abstrak                                                                                                  Perum BULOG Gorontalo berperan dalam penyediaan beras untuk menjamin ketahanan pangan. Penelitian ini bertujuan untuk mengoptimalkan biaya persediaan yang meliputi pemesanan dan penyimpanan beras guna menghindari kelebihan stok yang meningkatkan biaya, dengan mempertimbangkan penyediaan pasokan. Metode yang digunakan adalah Integer Linear Programming (ILP) untuk menentukan keputusan pemesanan dan penyimpanan yang optimal, serta analisis sensitivitas untuk mentransmisikan perubahan parameter dampak terhadap solusi optimal. Hasil optimasi menunjukkan bahwa pendekatan ILP berhasil menurunkan biaya persediaan sebesar 17,6% per tahun, dari Rp 208.423.972 menjadi Rp 171.813.600. Analisis sensitivitas mengungkap bahwa perubahan permintaan dan pasokan pasokan sebesar 10% dapat menyebabkan solusi optimal menjadi tidak layak, sementara perubahan kapasitas pasokan dan biaya pembelian memiliki dampak yang lebih fleksibel terhadap hasil optimasi. Kata Kunci: Optimasi, Persediaan, Integer Linear Programming, Analisis Sensitivitas. Abstrak Perum BULOG Gorontalo memegang peranan penting dalam penyediaan beras untuk menjamin ketahanan pangan. Penelitian ini bertujuan untuk mengoptimalkan pemesanan dan penyimpanan beras guna mencegah terjadinya kelebihan stok yang dapat meningkatkan biaya, dengan mempertimbangkan ketidakpastian pasokan. Metode yang digunakan adalah Integer Linear Programming (ILP) untuk menentukan keputusan pemesanan dan penyimpanan yang optimal, serta analisis sensitivitas untuk mengevaluasi dampak perubahan parameter terhadap solusi optimal. Hasil optimasi menunjukkan bahwa pendekatan ILP berhasil menurunkan biaya persediaan sebesar 17,6% per tahun, dari Rp208.423.972 menjadi Rp171.813.600. Analisis sensitivitas menunjukkan bahwa perubahan ketidakpastian permintaan dan pasokan sebesar 10% dapat membuat solusi optimal tidak dapat dilaksanakan, sedangkan perubahan kapasitas pasokan dan biaya pembelian memiliki dampak yang lebih fleksibel terhadap hasil optimasi. Kata Kunci : Persediaan, Optimasi, Integer Linear Programming, Analisis Sensitivitas.
Pemanfaatan Pelabelan Harmonis Graf Ular S_n Dalam Kriptografi Polialfabetik Tahir, Fauzia D.; Katili, Muh Rifai; Yahya, Nisky Imansyah; Wungguli, Djihad; Asriadi; Nurwan; Armayani Arsal
Jurnal Derivat: Jurnal Matematika dan Pendidikan Matematika Vol. 12 No. 2 (2025): Jurnal Derivat (Agustus 2025)
Publisher : Pendidikan Matematika Universitas PGRI Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31316/j.derivat.v12i2.7815

Abstract

This research discusses harmonious labeling on the snake graph  and its application in polyalphabetic cryptography. A harmonious labeling is an injective function from the set of vertices to the set of integers modulo , defined as . This function induces an edge labeling function . For each edge connecting vertices  and , the edge label is given by , producing distinct edge labels. This study presents the construction process of harmonious labeling on the snake graph , where  and . The results show that the snake graph satisfies the conditions for being harmoniously labeled since each edge receives a unique label. The vertex set of  is defined as  and the edge set as  The harmonious labeling on this graph is then applied in cryptography, particularly in forming a cipher table used as a key in the polyalphabetic encryption and decryption process. This approach enhances cryptographic security, as a single plaintext letter can be transformed into various ciphertext possibilities, thereby increasing encryption strength and complicating message decryption attempts by unauthorized parties.  Keywords: harmonious labeling, snake graph, cryptography, polyalphabetic cipher
Co-Authors Agusyarif Rezka Nuha Al Fajri, Iman Aliwu, Randa Resvitasari Asriadi Daud, Sriwati M. Djihad Wungguli Djuma, Clara Anggriani Dukalang, Hendra Hartayuni Sain Hasan S. Panigoro Ismail Djakaria Isran K Hasan Jeffry Kusuma Kasim, Ranan Lailany Yahya Muhammad Rifai Katili Nadhilah, Farhah Nasria Nacong Ningsih, Setia NISKY IMANSYAH YAHYA Nurwan Nurwan, Nurwan Nurwijayanti Rahim, Delvira Masita Rahmi, Emli Selvy Musdalifah Setia Ningsih Setia Ningsih siswanto, Navira Tahir, Fauzia D.