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All Journal QISTINA: Jurnal Multidisiplin Indonesia Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia
Pedro Stella Mario Meyar Waruwu
Universitas Negeri Medan
Religion Humanities Computer Science & IT Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Nursing Social Sciences

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Analisis Peramalan Produksi dan Perdagangan Karet Indonesia Menggunakan Model ARIMA Muhammad Raffi Akbar Tjg; Pedro Stella Mario Meyar Waruwu; Gerhard Hasangapon Parapat; Zulfahmi Indra
QISTINA: Jurnal Multidisiplin Indonesia Vol. 4 No. 2 (2025): December 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/qistina.v4i2.7341

Abstract

Perdagangan karet Indonesia memiliki peran strategis dalam mendukung perekonomian nasional, terutama melalui kontribusinya terhadap devisa dan lapangan kerja. Fluktuasi harga dan volume ekspor-impor karet dipengaruhi oleh faktor global, produktivitas dalam negeri, dan daya saing pasar internasional. Teknik peramalan perdagangan karet menjadi penting untuk merancang strategi kebijakan dan bisnis yang adaptif. Penelitian ini bertujuan untuk mengkaji teknik peramalan yang relevan dengan kondisi aktual perdagangan karet Indonesia melalui analisis data historis, model time series, dan fungsi transfer. Data diperoleh dari publikasi resmi Kementerian Pertanian, Outlook Komoditas Karet 2023, serta analisis kinerja perdagangan karet tahun 2021–2024. Hasil kajian menunjukkan bahwa penerapan model ARIMA dan fungsi transfer memberikan proyeksi yang cukup akurat terhadap tren produksi dan perdagangan karet. Temuan ini memberikan dasar bagi pengambil kebijakan dan pelaku usaha untuk merumuskan strategi perdagangan jangka menengah dan panjang secara lebih tepat.
Calculation of Student Savings with Monthly Contributions and Gradual Use Using Definite Integrals Yeremia Setya Maharman Gurning; Pedro Stella Mario Meyar Waruwu; Aurela Khoiri Nasution
AURELIA: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Vol. 4 No. 1 (2025): January 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/aurelia.v4i1.4756

Abstract

This research aims to calculate student savings balances by considering continuous monthly contributions and gradual expenditure using a definite integral approach. Using the descriptive quantitative method, data was collected through an online questionnaire survey involving five respondents. Data analysis uses a definite integral formula implemented through MATLAB software, producing a projection of each student's savings balance within a 6 month period. The research results show that the integral approach is certainly effective in modeling the growth of savings balances. Respondents who are disciplined in saving with little spending tend to have a significant positive balance, while those whose savings contribute less than their spending experience a deficit. Simulation with MATLAB makes it easier to visualize and plan students' finances. This approach provides important insights into personal financial management, particularly in saving regularly and understanding the impact of continuous interest. It is hoped that these findings can help students improve financial literacy and make financial planning more effective.
Co-Authors Aurela Khoiri Nasution Gerhard Hasangapon Parapat Muhammad Raffi Akbar Tjg Yeremia Setya Maharman Gurning Zulfahmi Indra, Zulfahmi