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All Journal Jurnal Keteknikan Pertanian Tropis dan Biosistem Jurnal Teknologi Pertanian Jurnal Ilmiah Rekayasa Pertanian dan Biosistem KACANEGARA Jurnal Pengabdian pada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Indonesian Physical Review Jurnal Pengabdian kepada Masyarakat Indonesia (JPKMI) Journal of Agricultural and Biosystem Engineering Research
Arief Sudarmaji, Arief
Jenderal Soedirman University
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Nursing Physics Public Health Social Sciences

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Penerapan Pompa Air Tenaga Surya untuk Irigasi Sawah di Desa Pruwatan, Kabupaten Brebes, Jawa Tengah: Implementation of Solar Water Pumps for Rice Field Irrigation in Pruwatan Village, Brebes Regency, Central Java Sudarmaji, Arief; Haryanto, Totok Agung Dwi; Lestari, Sri; Mudmainah, Siti; Febriyono, Wahyu; Murdiantoro, Randi Adzin
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 8 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i8.8948

Abstract

Water shortages during the dry season are the main problem for rice farmers in Pruwatan Village, Brebes District, Central Java. Currently, many rice fields in Pruwatan Village are rain-fed. This condition has been caused by natural disasters since 2010, which have resulted in dams breaking and landslides in irrigation canal cliffs. To meet water needs, this community service activity has built a solar-powered pump installation to raise water from the Pemali River that flows through Pruwatan Village to be channeled into the irrigation canal. The solar-powered pump uses an off-grid model (independent electricity without a PLN network connection) and without batteries. The pump used is a submersible type. The electrical energy to drive the pump comes 100% from the installed solar panels. The main device of the solar-powered pump consists of a series of 10,000 Wp solar panels, two units of 3 HP built-in inverters, two units of 3 HP submersible pumps, and a safety circuit (MCB). The pumps used are two 3 HP submersible pumps installed in parallel. The pump raises water from the Pemali River to the irrigation channel about 120 meters away with an elevation of 30 meters. The built-in inverter has a short circuit safety device, over/under voltage and undervoltage detection, and easy and user-friendly operation.
NON-INVASIVE DETERMINATION OF LIQUID DIFFUSION COEFFICIENTS USING LASER BEAM DEFLECTION AND REFRACTIVE INDEX GRADIENTS: A STUDY ON NaCl Handoko, Djati; Hifzhi, Affan; Sudarmaji, Arief; Dewi, Fitria Yunita
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.500

Abstract

This research describes and verifies the creation of a straightforward system for determining liquid diffusion coefficients using the Laser Beam Deflection (LBD) technique for measuring diffusion rates in sodium chloride solutions. The system exploits refractive index gradients that develop during diffusion to produce a detectable laser beam deviation, which is subsequently analyzed to calculate diffusion coefficients. Our experimental setup, which builds on Wiener's original design with several improvements, consists of a laser source with a cylindrical lens, a diffusion cell, and a screen for capturing projected images. We conducted an in-depth analysis of time-dependent measurements (5, 20, and 45 minutes), concentration variations (20/100, 25/100, and 30/100 NaCl/aquades ratios), and geometric configurations (30°, 45°, and 60° tilt angles) and found that the initial diffusion coefficients exhibit time-dependent behavior before stabilizing at approximately.  Within the examined range, concentration had a negligible impact on diffusion coefficients, but the geometric orientation had a substantial effect on measurement accuracy, resulting in a measurement error of approximately 3.00% when the configuration was set at 45°. Linear correlations between the natural logarithm of the ratio of the concentration difference to time, and the inverse square of the height, were found to be consistent with Fick's second law of diffusion under all tested conditions. This non-invasive approach offers a dependable substitute for conventional methods of diffusion measurement, which may be utilised in fields such as solution chemistry, food science, and pharmaceutical formulations.
Co-Authors Agus Margiwiyatno Anggraini, Dewi Fitri Asna Mustofa Dewi, Fitria Yunita Dian Novitasari Efrilla, Alif V. Eni Sumarni Febriyono, Wahyu Handoko, Djati Hardanto . Hari Kuncoro, Purwoko Hety Handayani Hidayat Hifzhi, Affan Irawadi, Irawadi Krissandi Wijaya Kuncoro, Purwoko H. Kuncoro, Purwoko Hari Listanti, Riana Masrukhi Masrukhi Mudmainah, Siti Poppy Arsil Randi Adzin Murdiantoro Rifah Ediati Ritonga, Abdul Mukhlis Ropiudin . Saparso Siswantoro Siswantoro Siti Mudmainah Soolany, Christian Sri Lestari Sulistyo, Susanto B. Susanto Budi Sulistyo Totok Agung Dwi Haryanto Totok Agung Dwi Haryanto Utari, Hirdilla Safitri Dwi