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All Journal G-Tech : Jurnal Teknologi Terapan Indonesian Community Journal
Bagus Sriwijaya
Universitas Islam Raden Rahmat, Indonesia
Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Public Health Social Sciences Other

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Sosialisasi Penerapan Kesehatan dan Keselamatan Kerja Sebagai Upaya Antisipasi Potensi Bahaya Kerja Pada Bengkel Las Desa Luminu, Bantur Malang Bagus Sriwijaya; Ratna Fajarwati Meditama; Ary Kusuma Purwady; Bella Cornelia Tjiptady; Luchyto Chandra Permadi; Faisol Khoufi Asshidiqi; Kiki Darmawan
I-Com: Indonesian Community Journal Vol 4 No 2 (2024): I-Com: Indonesian Community Journal (Juni 2024)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/icom.v4i2.3598

Abstract

Kesehatan dan keselamatan kerja (K3) merupakan bidang yang terkait dengan kesehatan, keselamatan, dan kesejahteraan manusia yang bekerja di sebuah institusi maupun di lokasi proyek. Pengabaian prosedur K3 sering terjadi di kawasan pedesaan atau kawasan lingkungan kerja dengan menejemen prosedur K3 yang minim sehingga banyak dampak yang timbul karena suasana kerja yang tidak efisien dan sering memungkinkan terjadinya kecelakaan kerja. Tujuan pengabdian ini untuk menganalisa serta mensosialisasikan pentingnya penerapan prosedur K3. Metode yang dilakukan pada penlitian ini berupa analisis problem yang dapat menimbulkan dampak kecelakaan akibat kerja serta sosialisasi tentang pentingnya penerapan prosedur K3. Dari observasi yang telah dilakukan ditemukan berbagai macam kondisi kerja yang tidak sesuai dengan penerapan prosedur K3 yang telah ditetapkan pemerintah sebagai standart pengoperasian kerja. Dari pembahasan yang telah dijelaskan dapat diambil kesipulan bahwa penggunaan aturan penerapan prosedur sangat penting agar supaya tercipta kondisi lingkungan kerja yang aman dan nyaman serta terhindar dari kecelakaan kerja.
Sustainable Analysis of Calophyllum Inophyllum Oil for Eco-Friendly Green Lubricants as an Alternative to Mineral Oils Kiki Darmawan; Novan Habiburrohman; Mudrikah Mudrikah; Mohammad Na’im Humam; Bagus Sriwijaya; Luchyto Chandra Permadi; Farisan Robbani; Mojibur Rohman
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8231

Abstract

Calophyllum Inophyllum (nyamplung) Oil is recognized as a promising non-edible vegetable oil for the development of sustainable green energy lubricants. This study aims to improve the physicochemical characteristics of nyamplung oil through a two-step transesterification followed by esterification using trimethylolpropane (TMP), and to assess its tribological performance. The refined oil exhibited a flash point of 212 °C (ASTM D92) and a pour point of 8 °C (ASTM D97), indicating excellent thermal and flow stability. The kinematic viscosity was 38.3 cSt (ASTM D445) and the density 0.88 g/cm³ (ASTM D4052), both within industrial lubricant standards. The acid value decreased markedly from 36.5 to 1.62 mg KOH/g, while the iodine value (0.006 g I₂/100 g) and peroxide value (0.23 Meq/kg) demonstrated chemical stability. FTIR analysis confirmed the formation of ester functional groups, and GC–MS results showed a balanced distribution of saturated and unsaturated fatty acids. Overall, the modified Calophyllum Inophyllum Oil fulfills key technical criteria for eco-friendly green energy lubricants and shows strong potential as a renewable alternative to conventional mineral-based lubricants in industrial applications. Nevertheless, its crude form presents several drawbacks, including high acid and peroxide values as well as poor oxidative stability.
Continuously Variable Transmission Roller Mass Analysis with Drive Pulley Angle Variations of 13.5° and 12° on a 150 cc V - Matic Automatic Transmission Motorcycle Luchyto Chandra Permadi; Mojibur Rohman; Ratna Fajarwati Meditama; Bella Cornelia Tjiptady; Faisol Khoufi Asshidiqi; Mudrikah Mudrikah; Bagus Sriwijaya
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.10171

Abstract

The Continuously Variable Transmission (CVT) system plays a crucial role in transmitting power from the engine to the drive wheels while automatically adjusting the transmission ratio according to vehicle speed and load conditions. Automatic transmissions have gained widespread attention in the automotive industry due to their high efficiency, smooth gear shifting, cost-effectiveness, and enhanced driving comfort. This study aims to investigate the effect of drive pulley angle variation and roller weight on the performance characteristics of a CVT system, particularly in terms of power output, torque, vehicle speed, and acceleration. An experimental method was employed by modifying the drive pulley angle and roller weight configurations, followed by performance testing using a dynamometer (dynotest). Several combinations of pulley angles and roller weights were evaluated to determine the optimal configuration for vehicle performance. The results indicate that a drive pulley angle of 13.5° combined with a 10-gram roller produced the most stable torque and power characteristics across low to high engine speeds. This configuration also provided superior acceleration performance and smoother power delivery under urban driving conditions. The findings offer practical insights for optimizing CVT design and tuning to improve vehicle efficiency, responsiveness, and overall driving performance.
Co-Authors Ary Kusuma Purwady Bella Cornelia Tjiptady Faisol Khoufi Asshidiqi Farisan Robbani Kiki Darmawan Luchyto Chandra Permadi Permadi Mohammad Na’im Humam Mudrikah Mudrikah Novan Habiburrohman Ratna Fajarwati Meditama Rohman, Mojibur