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All Journal SOSCIED Griya Journal of Mathematics Education and Application
Christari Lois Palit
Universitas Negeri Manado
Education Mathematics Social Sciences

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PEMAKSIMALAN PROFIT PERTANIAN MELALUI PROGRAM LINEAR : STUDI KASUS PADA PERTANIAN PADI DAN JAGUNG DI KELURAHAN TARA-TARA, KOTA TOMOHON Christari Lois Palit; Alycia Nikita Poluan; Breisi Maria Luntungan; Meyni Novela Runtu; Miranda Yuliana Sondakh; Tesalonika Junira Mogi; Virginia Sarah Kaparang
SOSCIED Vol 8 No 2 (2025): SOSCIED - November 2025
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v8i2.1078

Abstract

Farmers in Tara-Tara Village, Tomohon City, still face difficulties in increasing their income due to limited production inputs, such as land, fertilizer, pesticides, and seeds. Decision-making based solely on experience often leads to inappropriate resource utilization. This study aims to determine the most profitable combination of rice and corn planting areas while still taking into account the limitations of available inputs. A quantitative approach based on Linear Programming was used in the analysis, with data collected through interviews and field observations. Calculations were performed using the Simplex method using QM for Windows software. The results showed that the optimal allocation was obtained at a planting area of ??0.97 units for rice and 1.53 units for corn, resulting in an estimated profit of Rp 12,615,150 per planting season. From the analysis of slack variables, it was found that fertilizer and seeds were the most limiting constraints on increasing production, while land still has room for utilization. Based on these findings, this study recommends that farmers continue to focus their efforts on rice and corn commodities and increase the availability of fertilizer to fully optimize the land
Optimization of Clean Water Distribution Networks at the Unima FMIPA Campus Using the Minimum Spanning Tree Method Christari Lois Palit; Dyrel Samuel Lion Kusnadi
Griya Journal of Mathematics Education and Application Vol. 6 No. 2 (2026): Juni 2026
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v6i2.1172

Abstract

The availability of clean water within higher education institutions is highly crucial to support the operations and convenience of the academic community. Issues regarding limited access to clean water were identified within the Faculty of Mathematics and Natural Sciences (FMIPA) at the State University of Manado, particularly in the Department of Mathematics Education. This study aims to model the clean water distribution network in FMIPA as a weighted graph and determine the optimal distribution path with minimum total pipe length using the Minimum Spanning Tree (MST) method via Prim’s Algorithm. This operations research-based quantitative study mapped six main nodes encompassing the water tank and departmental buildings. Distance data were obtained through digital map observations and Google Earth based on realistic piping pathways. The results indicate that optimization using Prim’s Algorithm produces an efficient single network configuration with the route: . This network successfully eliminates path redundancy, achieving a minimum total pipe length of 175 meters. Through this modeling, the Mathematics Education Department secures a reliable water supply delivered from the Science Education Building with a distance efficiency of only 25 meters. The implications of this research provide a practical recommendation for the university administration to efficiently optimize the allocation of plumbing material budgets.
Modeling Online Loan Risk Dynamics with SEIQRL, Regulation, and Financial Literacy Analysis in Indonesia Christari Lois Palit; Agresia Servina Sabubun; Dyrel Samuel Kusnadi; Julius Zendrato; Mikha Rajagukguk; Tessy Angraini Mokodanga
Griya Journal of Mathematics Education and Application Vol. 6 No. 2 (2026): Juni 2026
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v6i2.1175

Abstract

This study examines the dynamics of risky online lending behavior in Indonesia using the SEIQRL mathematical model. The model extends the SEIR approach by adding Quarantined (Q) and Literate (L) compartments to represent regulatory intervention and financial literacy. This study aims to construct the SEIQRL model, analyze the risk-free equilibrium point, calculate the basic reproduction number (R₀), and evaluate the effects of regulation and financial literacy on the spread of risky online lending behavior. The method uses a quantitative approach based on mathematical modeling and numerical simulation with Wolfram Mathematica. The results show that the baseline scenario produces an R₀ value of 6.1538, indicating that risky online lending behavior can spread strongly within the population. Strong regulation and strong literacy scenarios reduce the risk, but they do not fully control its spread. The combined regulation and literacy scenario produces an R₀ value of 0.8696, meaning the risk can be controlled because R₀ < 1. These findings show that controlling risky online lending cannot rely only on access restrictions or service blocking. Early financial literacy must also serve as a preventive strategy. The SEIQRL model can support policy analysis for controlling online lending risks in Indonesia.
Co-Authors Agresia Servina Sabubun Alycia Nikita Poluan Breisi Maria Luntungan Dyrel Samuel Kusnadi Dyrel Samuel Lion Kusnadi Julius Zendrato Meyni Novela Runtu Mikha Rajagukguk Miranda Yuliana Sondakh Tesalonika Junira Mogi Tessy Angraini Mokodanga Virginia Sarah Kaparang