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All Journal SOSCIED Griya Journal of Mathematics Education and Application Jurnal Ekonomi Journal Focus Action of Research Mathematic (Factor M)
Christari Lois Palit
Universitas Negeri Manado
Economics, Econometrics & Finance Education Mathematics Social Sciences Other

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THE EFFECT OF FINANCIAL PERFORMANCE ON PROFIT CHANGES BEFORE TAX IN THE BANKING SUB-SECTOR LISTED ON THE INDONESIA STOCK EXCHANGE Clara Neltje Meini Rotinsulu; Samuel PD Anantadjaya; Christari Lois Palit; PA. Andiena Nindya Putri
Jurnal Ekonomi Vol. 12 No. 02 (2023): Jurnal Ekonomi, Perode April - Juni 2023
Publisher : SEAN Institute

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Abstract

This study aims to determine the effect of independent variables, in the form of: Capital Adequacy Ratio (CAR), Financing to Deposit Ratio (FDR) and Non-Performing Financing (NPF) on Profit Changes at Commercial Banks in Indonesia for the 2015 - 2022 Period. The method used in this research is quantitative. A sample of 8 banks is used from a total population of 36 commercial banks in Indonesia. The results showed that the three independent variables had no effect on changes in commercial bank profits, either partially or simultaneously. So it is concluded that commercial banks in increasing profits do not need to focus on the three variables above
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
Digital media and K–12 mathematical literacy: A systematic review of comparative studies Navel Oktaviandy Mangelep; Frisca Mareyta Pongoh; Silvana Enjelina Bander; Imriani Moroki; Christari Lois Palit; Gabriella Hillary Wenur; Kinzie Feliciano Pinontoan
Journal Focus Action of Research Mathematic (Factor M) Vol. 9 No. 1 (2026): June 2026
Publisher : Universitas Islam Negeri (UIN) Syekh Wasil Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30762/f_m.v9i1.8342

Abstract

The development of educational technology has created significant opportunities to improve students' mathematical literacy through the integration of digital media into mathematics instruction. This study systematically reviews and synthesizes comparative evidence on digital media versus traditional teaching methods in K–12 mathematical literacy. As a qualitative systematic review rather than a meta-analysis, it characterizes reported findings rather than establishing pooled causal effectiveness. Forty quantitative studies were selected based on predefined inclusion and exclusion criteria, with screening documented in a PRISMA flow diagram covering experimental designs, digital media interventions, and quantitative literacy measures. Methodological quality was appraised using a structured risk-of-bias assessment. Most studies reported gains in problem-solving, comprehension, spatial reasoning, and higher-order thinking. Interactive software, augmented reality, and educational games boosted motivation through visualization, personalization, and feedback, despite persistent limitations in devices and access. These findings are broadly consistent with digital learning functioning as an adaptive pedagogical strategy. However, the strength of evidence varied with study quality, and most studies did not report comparable effect sizes, limiting cross-study conclusions. This study enriches the knowledge base on technology-based mathematics education and provides an empirical foundation for teachers, policymakers, and researchers to design more contextual, interactive, and literacy-oriented mathematics learning for the 21st century.
Optimalisasi Produksi Usaha Kuliner: Pendekatan Linear Programming Pada Rumah Makan Jawa Lumintu Christari Palit; Agresia Sabubun; Achwan Zalalludin; David Kapele; Dyrel Kusnadi; Julius Zendrato; Samuel Bisuan
Griya Journal of Mathematics Education and Application Vol. 5 No. 4 (2025): Desember 2025
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v5i4.992

Abstract

Penelitian ini bertujuan untuk menentukan kombinasi produksi makanan yang paling optimal pada Rumah Makan Jawa Lumintu agar keuntungan harian dapat dimaksimalkan. Permasalahan diselesaikan menggunakan metode Simpleks dalam model program linear dengan mempertimbangkan keterbatasan bahan baku seperti ayam, lalapan, bumbu nasi goreng, mie, serta berbagai jenis bakso. Data diperoleh melalui wawancara dan observasi langsung terhadap pemilik usaha. Hasil penelitian menunjukkan bahwa kombinasi produksi optimal terdiri atas 15 porsi nasi goreng, 105 porsi ayam lalapan, 85 porsi bakso biasa, 30 porsi bakso tenes, dan 30 porsi bakso urat. Kombinasi tersebut menghasilkan keuntungan maksimum sebesar Rp 5.310.000 per hari. Analisis kendala menunjukkan bahwa beberapa bahan baku menjadi pembatas utama dalam proses produksi, terutama bumbu nasi goreng, ayam, bakso tenes, dan bakso urat yang habis digunakan pada solusi optimal. Penelitian ini menyimpulkan bahwa metode Simpleks efektif digunakan untuk perencanaan produksi makanan dan dapat menjadi dasar bagi pengambilan keputusan operasional yang lebih efisien.
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.
Simulasi Numerik Pengendalian Endemik Demam Berdarah Dengue di Kabupaten Minahasa menggunakan Pendekatan Model SIR-A Christari Lois Palit; Virginia Sarah Kaparang; Samuel Jason Bisuan; Suci Cahnia Laode; Gerald Sunantepar Pakala; Harly Marsel Karamoy
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.v6i2.1201

Abstract

Dengue Hemorrhagic Fever (DHF) persists as a critical threat to public health sectors within tropical ecosystems, including Indonesia. This study evaluates the epidemiological fluctuations of Dengue virus transmission in Minahasa Regency by formulating a SIR-A compartmental mathematical model, focusing on the contribution of strengthened clinical interventions to patient recovery rates. The developed dynamic framework incorporates interactions between human cohorts (susceptible, infected, and recovered phases) and an aquatic pre-adult vector group (mosquito larvae/pupae). The investigative procedure involves constructing a system of nonlinear ordinary differential equations, followed by establishing equilibrium states, calculating the basic reproduction number () threshold, and executing computational simulations via Wolfram Mathematica. Computational outputs demonstrate that an escalation in mosquito larvae density correlates positively with accelerated disease transmission rates. Conversely, optimizing clinical control by increasing the recovery parameter significantly reduces the active infected cohort and drives the system’s trajectory toward a stable disease-free equilibrium state. These insights indicate that accelerating patient care effectiveness and upgrading healthcare infrastructure are crucial policy instruments for suppressing DHF endemic risks in Minahasa Regency.
Co-Authors Achwan Zalalludin Agresia Sabubun Agresia Servina Sabubun Alycia Nikita Poluan Breisi Maria Luntungan Clara NM. Rotinsulu David Kapele Dyrel Kusnadi Dyrel Samuel Kusnadi Dyrel Samuel Lion Kusnadi Frisca Mareyta Pongoh Gabriella Hilary Wenur Gerald Sunantepar Pakala Harly Marsel Karamoy Imriani Moroki Julius Zendrato Kinzie Feliciano Pinontoan Meyni Novela Runtu Mikha Rajagukguk Miranda Yuliana Sondakh Navel Oktaviandy Mangelep PA. Andiena Nindya Putri Samuel Bisuan Samuel Jason Bisuan Samuel PD Anantadjaya Silvana Enjelina Bander Suci Cahnia Laode Tesalonika Junira Mogi Tessy Angraini Mokodanga Virginia Sarah Kaparang