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All Journal Edumatsains Jurnal Saintek Lahan Kering Jurnal Statistika dan Matematika (Statmat) Jurnal Diferensial Jurnal Ilmiah Wahana Pendidikan Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Jurnal Umum Pengabdian Masyarakat (JUPEMAS) Journal of Mathematics Theory and Applications
Obe, Leonardus Frengky
Universitas Timor
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Nursing Physics Public Health Social Sciences Other

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Journal : Jurnal Saintek Lahan Kering

 1 
PEMODELAN MATEMATIKA PENYEBARAN PERILAKU MEROKOK BERDASARKAN FAKTOR EKONOMI DAN FAKTOR PSIKOLOGI Desi Marida Babis; Elinora Naikteas Bano; Sulasri Suddin; Leonardus Frengky Obe
Saintek Lahan Kering Vol 4 No 2 (2021): JSLK DESEMBER 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i2.1541

Abstract

Smoking is the activity of burning tobacco then sucking the smoke and releasing it back through the mouth. This study examines the spread of smoking behavior based on economic factors and psychological factors. This model divides the population into 4 subpopulations, namely potential smoker , Beginner smoker , Smoker subpopulation and recovery subpopulation The stability of the smoking-free equilibrium point is obtained by linearizing the equation to obtain the Jacobian matrix and then the eigenvalues will be obtained. The basic reproduction number which is the threshold for the spread of smoking behavior where smoking behavior will disappear if Ro < 1 and will be endemic when Ro > 1.
Analisis Sistem Pembayaran Kredit di KSP Kopdit Swasti Sari Cabang Atambua Menggunakan Persamaan Beda Linear Orde Satu Agustinus Mario Bere; Faustianus Luan; Leonardus Frengky Obe
Saintek Lahan Kering Vol 6 No 1 (2023): JSLK JUNI 2023
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v6i1.2154

Abstract

ABSTRACT Giving credit is a business activity that contains a high risk and affects the sustainability of businesses such as cooperatives and banking. The aims of this research are to: (a) knowing the credit decision making system implemented in KSP Kopdit Swasti Sari, (b) knowing the calculation of the remaining credit payments using the first-order linear difference equation. In this study, the method used to calculate the remaining debt for credit payments is a first-order linear difference equation, namely the remaining debt after the first payment is the same as the remaining debt after payment to t plus interest minus annuity. The results of this study indicate that the credit decision-making process is considered worthy of receiving a credit loan if it meets the requirements that have been set at the KSP Kopdit Swasti Sari. The step to calculate the remaining credit payments using a mathematical model is to find the amount of fixed installments from an ordinary annuity with a different loan size, namely Rp 5.000.000, Rp 10.000.000 and Rp 15.000.000. After getting the results from the ordinary annuity, a mathematical model of the remaining credit payments is formed using equation (2.13). The results of the calculation of the remaining credit payments using a mathematical model are as follows: For the first order linear difference equation with a loan size of Rp 5.000.000 after paying the first installment () the remaining debt is Rp 4.900.081 and the remaining debt () of Rp. 8. For a large loan of Rp. 10.000.000 after paying the first installment () the remaining debt is Rp. 9.800.162 and on payment of () the remaining debt is Rp. 16. For a large loan of Rp 15.000.000 after paying the first installment () the remaining debt is Rp 14.700.243 and on payment of () the remaining debt is Rp 24.
Pemodelan Matematika dan Simulasi Kecanduan Berbelanja Online pada Aplikasi Shopee Tipe SEIR Naitili, Adriana; Obe, Leonardus Frengky; Bano, Elinora Naikteas
Saintek Lahan Kering Vol 6 No 2 (2023): JSLK DESEMBER 2023
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v6i2.2408

Abstract

Shopee is an online shopping application that is easy to use with customers' smartphones anytime and anywhere. The presence of Shopee can make it easier for users to shop for goods/services products via smartphones without the need to use a computer. Shopee sells all kinds of needs such as household needs, fashion, watches, cellphones, accessories, beauty, and so on. Without realizing it, Shopee has a negative impact on users who use it continuously so that it becomes a habit / addiction. Online shopping results in waste because shopping is not according to need but desire because it does not have high self-control, resulting in stress or depression. This study aims to build a mathematical model of online shopping addiction in the SEIR type Shopee application. Based on the research results, two equilibrium points are obtained, namely the equilibrium point free of online shopping addiction on the Shopee application and will be stable when and the equilibrium point there is online shopping addiction on the Shopee application and will be stable when . Simulation results are observed in two conditions, namely when , the value of is obtained, meaning that the rate of people interacting with people who are addicted to online shopping at Shopee is still small, causing the rate of groups of people who create accounts to shop and eventually become addicted to online shopping. When , the value of is obtained, meaning that the rate of people interacting with people who are addicted to online shopping in the Shopee application has increased, causing the rate of groups of people who create accounts in the Shopee application and eventually become addicted to shopping online at Shopee to increase over time.
Co-Authors Adriana Leltakaeb Agustina Viktoria Tae Agustinus Mario Bere Bano, Elinora Naikteas Bernadina Metboki, Bernadina D. Fatin Damaris Lalang Deoniza Antonia Aprilita Lopez Desi Marida Babis Dethan, Nugraha K. F. Faustianus Luan Fried Markus Allung Blegur Hendrika Yeni Meti Josua Sahala Kristina Irnasari Naikofi Mada, Grandianus Seda Maria Magdalena Abi Maria Trisilda Kapitan Marselinus Banu Naitili, Adriana Natalius Nahak Oktovianus R. Sikas Pareira, Magdalena Sunarty Pasi, Maria Selfiana Sulasri Suddin Teti, Desriyani Yulianita Br. Kolo Tuas, Maria Angelina Vera Lakapeni Yuliana Kolo