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p-Index From 2021 - 2026
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All Journal Journal of Energy, Mechanical, Material and Manufacturing Engineering Cahaya Pengabdian
Muhamad Muhajir
Politeknik Negeri Tanah laut
Computer Science & IT Education Mechanical Engineering Social Sciences Other

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Perawatan Komponen CVT Sepeda Motor Matik bagi Warga Desa Pemuda Muhammad Yunus; Muhammad Rezki Fitri Putra; Taufik Abdullah Attamimi; Kurnia Dwi Artika; Bayu Agung Wicaksono; Yulima Melsipa Lingga; Jesi Yardani; Sri Muntiah Andriami; Muhamad Muhajir; Barokah Barokah; Azelia Puteri
Cahaya Pengabdian Vol. 3 No. 1 (2026): Juni
Publisher : Apik Cahaya Ilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61971/cp.v3i1.327

Abstract

Automatic motorcycles are widely used as the primary means of transportation, making regular maintenance, particularly of the Continuously Variable Transmission (CVT) system, essential to maintain vehicle performance and extend service life. However, public knowledge regarding CVT maintenance remains limited, causing maintenance to be performed only after mechanical problems occur. This community service program aimed to improve the knowledge and basic skills of residents of Desa Pemuda in maintaining CVT components on automatic motorcycles. The program employed a service and mentoring approach consisting of lectures, demonstrations, hands-on training, and interactive discussions. The implementation included three stages: preparation, implementation, and evaluation. The results showed that all participants attended the activity until completion and demonstrated high enthusiasm throughout the program. Participants actively engaged in discussions and practical sessions while expressing positive responses toward the training methods applied. The activity provided participants with additional knowledge and practical experience in performing basic CVT maintenance, enabling them to apply simple maintenance procedures independently. Overall, the community service program successfully enhanced public awareness of the importance of periodic motorcycle maintenance to maintain vehicle performance, reduce the risk of component failure, and encourage sustainable vehicle maintenance practices.
Morphology, structure, and biodegradability of bacterial cellulose (BC) films with tapioca starch Muhammad Rasid Rida; Muhamad Muhajir; Muhammad Ramadhani
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 11 No. 1 (2026)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v11i1.43424

Abstract

The research investigates Bacterial Cellulose (BC)–starch films infused with tapioca starch to create eco-friendly, high-performance materials. It examines how different starch concentrations influence the microstructure, elemental composition, and degradation behavior of BC–based films. The films were produced through static fermentation of Acetobacter xylinum (A. xylinum), combined with tapioca starch at various weight ratios (97:3, 19:1, and 93:7). They were analyzed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and biodegradability tests under soil burial conditions. The results showed that increasing starch content significantly changed the film morphology, transforming the dense, smooth nanofibrillar structure of pure BC into a rougher, more porous surface. Elemental analysis indicated that carbon content rose with starch addition, peaking at 76.85% at an intermediate BC–starch ratio (19:1), then decreasing at higher starch loadings, suggesting surface compositional heterogeneity. Biodegradability tests revealed that the film with a BC-to-starch ratio of 93:7 degraded fastest after 27 days, likely due to increased hydrophilicity and microbial accessibility. These findings suggest that starch addition allows control over structural and degradation properties, making BC-starch films promising for sustainable applications such as flexible, biodegradable cable insulation or protective sheathing.
Co-Authors Azelia Puteri Barokah Barokah Bayu Agung Wicaksono Jesi Yardani Kurnia Dwi Artika Muhammad Ramadhani Muhammad Rasid Rida Muhammad Rezki Fitri Putra Muhammad Yunus Sri Muntiah Andriami Taufik Abdullah Attamimi Yulima Melsipa Lingga