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All Journal Jurnal Kolaboratif Sains Dharma Ekonomi
Daniel Imanuel Manafe
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Sistem Urban Portable Agriculture Berbasis IoT: Validasi Teknis dan Analisis Kinerja Platform Monitoring Hidroponik Berbiaya Rendah: IoT-Based Urban Portable Agriculture System: Technical Validation and Performance Analysis of a Low-Cost Hydroponic Monitoring Platform Joyfal Gulo, Menliman; Shofy Azzahra; Daniel Imanuel Manafe
Jurnal Kolaboratif Sains Vol. 8 No. 11: November 2025
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/jks.v8i11.8560

Abstract

Pertanian perkotaan dihadapkan pada tantangan ganda, yaitu kelangkaan lahan dan tingginya biaya adopsi teknologi yang menghambat aksesibilitas bagi petani skala kecil. Penelitian ini bertujuan untuk mengembangkan dan memvalidasi kinerja teknis dari sebuah sistem Urban Portable Agriculture (UPA) berbasis Internet of Things (IoT) sebagai solusi perangkat pemantau hidroponik berbiaya rendah. Dengan menggunakan metodologi rapid prototyping, sistem hidroponik vertikal dirancang dan dibangun, terintegrasi dengan sensor pH dan kekeruhan, serta dilengkapi kontrol pencahayaan LED otomatis dan dasbor visualisasi data real-time. Validasi kinerja sistem melibatkan analisis metrik teknis dan stabilitas operasional menggunakan algoritma klasterisasi Density-Based Spatial Clustering of Applications with Noise (DBSCAN). Hasil penelitian menunjukkan kinerja sistem yang andal, dengan akurasi sensor pH mencapai ±0.1 dan sensor kekeruhan ±2 NTU, serta latensi sistem end-to-end di bawah 5 detik. Analisis DBSCAN mengidentifikasi bahwa sistem beroperasi dalam kondisi stabil sebesar 86.5% dari waktu pengujian, yang menunjukkan reliabilitas operasional yang tinggi. Dengan total biaya realisasi sebesar Rp 2.000.000, prototipe ini secara signifikan lebih terjangkau dibandingkan alternatif komersial. Studi ini berhasil memvalidasi sebuah kerangka kerja teknologi yang fungsional dan terjangkau, serta berkontribusi pada konsep "graduated precision agriculture," yang sangat sesuai untuk aplikasi edukasi dan pertanian urban skala kecil di negara berkembang.
Pengaruh Kenaikan Pajak Pertambahan Nilai (PPN) dan Inflasi Terhadap Volume Penjualan Studi Kasus pada PT Astra International Tbk Tahun 2022 - 2024 Sulis Mutiara Zulfa; Daryanto Daryanto; Daniel Imanuel Manafe
Dharma Ekonomi Vol. 33 No. 1 (2026): Mei: DHARMA EKONOMI
Publisher : sekolah Tinggi Ilmu Ekonomi Dharmaputra Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59725/de.v33i1.386

Abstract

This study aims to analyze the impact of the increase in Value Added Tax (VAT) and inflation on the sales revenue of PT Astra International Tbk during the 2022–2024 period. The research employs a quantitative approach using multiple regression analysis to examine the relationship between VAT, inflation, and sales revenue. Secondary data were obtained from the company’s financial statements, inflation data from Statistics Indonesia (BPS), and VAT rate information from the Directorate General of Taxes (DJP). The data were analyzed to identify how VAT and inflation influence the company’s revenue. The results indicate that both VAT and inflation have a significant effect on sales revenue, both simultaneously and partially. The coefficient of determination (R²) of 0.899 shows that 89.9% of the variation in sales revenue is explained by the changes in VAT and inflation rates. These findings suggest that VAT and inflation are important economic factors that should be considered by businesses, especially in the automotive industry, when planning strategies for revenue generation. Furthermore, the study emphasizes the critical need for companies to adapt to changing fiscal policies and macroeconomic conditions to maintain profitability and competitive advantage in a fluctuating economic environment.
Co-Authors Daryanto Daryanto Joyfal Gulo, Menliman Shofy Azzahra Sulis Mutiara Zulfa