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All Journal JTERA (Jurnal Teknologi Rekayasa) Mandalika Mathematics and Educations Journal Logic : Jurnal Rancang Bangun Dan Teknologi Cahaya Pengabdian
Bayu Agung Wicaksono
Politeknik Negeri Tanah Laut
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Social Sciences Other

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Utilization of Corn Cob Waste as an Alternative Catalyst in Catalytic Converters for Diesel Engine Carbon Emission Reduction Muhajir Muhamad; Imron Musthofa; Hajar Isworo; Muhammad Rezki Fitri Putra; Bayu Agung Wicaksono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.140-146

Abstract

Catalytic converters function to transform harmful exhaust gases into less hazardous substances through catalytic reactions, primarily oxidation and reduction. This study aims to investigate the potential of corncob waste as an alternative catalytic material in catalytic converters for reducing carbon emissions from diesel engines. The methodology involves synthesizing biochar-based catalysts derived from corncobs via pyrolysis, followed by performance evaluation within a catalytic converter system under varying engine speeds: 700 RPM, 900 RPM, and 1100 RPM. Experimental results demonstrate that catalytic efficiency does not increase monotonically with char content; instead, the 70% char formulation achieved the highest smoke opacity reduction, recording 18.90% at 700 RPM and 14.70% at 900 RPM, outperforming both the 50% and 100% variants at 1100 RPM, where exhaust temperature and flow rate increase substantially, the 100% char catalyst showed comparatively greater stability, achieving a reduction of 5.50%, while the 70% formulation declined to 2.90%. These quantitative outcomes confirm that optimal performance arises from a balanced char loading that maximizes reactive surface area while preserving gas–solid interaction efficiency. Corncob biochar thus represents a viable and sustainable alternative to metal-based catalysts. However, the variability in performance across operating conditions and the need for improved thermal durability underscore the importance of further material optimization for commercial diesel applications.
Eksplorasi Etnomatematika pada Tugu Hari Jadi Kabupaten Dati II Tanah Laut Dewi Indra Anggraeni; Bayu Agung Wicaksono; Liny Mardhiyatirrahmah
Mandalika Mathematics and Educations Journal Vol 7 No 4 (2025): Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v7i4.10802

Abstract

This study explores the ethnomathematics embedded in the architecture of the Tugu Hari Jadi Kabupaten Dati II Tanah Laut, addressing the persistent issue of low mathematical literacy among Indonesian students in PISA assessments. The research emphasizes the urgent need for culturally relevant pedagogy to make mathematics less abstract and more engaging, particularly given the lack of existing ethnomathematical studies focusing on specific monuments like this one. The primary objective was to identify the inherent mathematical elements within the monument's design and determine their educational applicability. Utilizing a qualitative ethnographic approach, the research successfully catalogued concepts from both plane geometry (rectangles, circles, octagons) and solid geometry (octagonal prisms, cylinders, and hemispheres), complete with their respective mathematical formulas for area, perimeter, and volume calculations, and the role of trigonometry. The findings offer a strong ethnomathematical interpretation, revealing the monument as a cultural artifact that harmoniously symbolizes local values such as balance, steadfastness, and divinity. Educationally, the monument serves as an authentic learning resource to visualize complex geometry, thereby providing valuable contextual material to increase student interest, motivation, and critical mathematical literacy skills in line with global standards.
Kajian Pengembangan Desain dan Material Crash box dengan Pendekatan Analisis Bibliometrik Bayu Agung Wicaksono
JTERA (Jurnal Teknologi Rekayasa) Vol 10 No 2: December 2025
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v10.i2.2025.17-26

Abstract

Penelitian ini secara sistematis menganalisis tren dan perkembangan riset mengenai crash box dengan pendekatan bibliometrik. Melalui identifikasi pola publikasi, frekuensi topik, dan keterkaitan antar-topik dari 109 artikel ilmiah yang disaring dari basis data Google Scholar, studi ini memberikan gambaran komprehensif. Analisis menggunakan VOSviewer mengelompokkan riset crash box ke dalam fokus utama seperti crashworthiness, material dan struktur, optimasi desain, serta inovasi geometri. Tren menunjukkan pergeseran fokus dari pola deformasi dan penyerapan energi (2018–2020) menuju optimasi desain berbasis simulasi, struktur lattice, dan peningkatan crashworthiness (2021–2024). Selanjutnya, dilakukan kajian terhadap beberapa artikel yang memiliki nilai sitasi paling tinggi (besar sitasi lebih dari 100 kali). Hasil kajian terhadap artikel-artikel tersebut menunjukkan inovasi desain biomimetik (struktur tibia), struktur Negative Poisson’s Ratio (NPR), dan desain origami (pola diamond dan trapezoid) pada crash box. Penggunaan material Aluminium/CFRP juga terbukti meningkatkan performa penyerapan energi. Hasil ini memetakan perkembangan crash box dan mengidentifikasi peluang riset untuk desain serta material yang lebih optimal.
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.
Co-Authors Azelia Puteri Barokah Barokah Dewi Indra Anggraeni Imron Musthofa Isworo, Hajar Jesi Yardani Kurnia Dwi Artika Liny Mardhiyatirrahmah Muhajir, Muhamad Muhamad Muhajir Muhammad Rezki Fitri Putra Muhammad Yunus Sri Muntiah Andriami Taufik Abdullah Attamimi Yulima Melsipa Lingga