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All Journal Journal of Degraded and Mining Lands Management Malikussaleh Journal of Mechanical Science Technology
Abubakar, A
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Rancang Bangun dan Analisa Struktur Balance Bike Rotan dengan Beban Maksimal 15 kg Irfan, Said; Abubakar, A; Yusuf, Edy; Nayan, Ahmad
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.14964

Abstract

Penelitian ini bertujuan untuk menganalisis dampak penggunaan Balance Bike (BB) terhadap proses belajar mandiri bersepeda. Permasalahan penelitian terfokus pada perancangan dan pembuatan sepeda keseimbangan rotan yang nyaman dan aman untuk anak usia 3-5 tahun. Kajian dibatasi pada desain spesifik rangka utama dan aksesoris pendukungnya. Metodologi penelitian meliputi tinjauan pustaka, analisis produk, perancangan komponen, analisis kekuatan material, serta pembuatan dan perakitan sepeda keseimbangan. Kajian tersebut diambil dari bidang desain rangka sepeda, fungsi keseimbangan sepeda, serta sifat dan pemanfaatan rotan. Temuan penelitian ini bertujuan untuk menawarkan rangka sepeda anak baru yang ramah lingkungan dan menampilkan keunikan rotan sebagai bahan rangka sepeda. Signifikansi studi ini terletak pada memberikan wawasan mengenai proses pembuatan sepeda keseimbangan dan penghematan biaya melalui penggunaan rotan. Hasil penelitian juga memberikan kontribusi terhadap pemanfaatan rotan sebagai material dan analisis struktur Rotan Balance Bike. Dari Analisa manual diberi beban 15 kg pada seat stay dan tranmisi gaya pada seat stay 61.29 N, pada chain stay 119.093 N, pada down tube 125.10 N, pada head tube 178.44 N, dan pada fork 13.38 N. Untuk menghitung tegangan pada setiap bagian tube adalah dengan cara membagikan tekanan dengan luas penampang pada masing-masing tube maka didapatkan hasil tegangan chain stay 0.04 , seat stay 0.48 , down tube 0.09 , head tube 0.07 , fork 0.03 . Untuk memperjelas analisis balance bike diuji Kembali dengan menggunakan Autodesk Inventor, hasil simulasinya adalah pada beban 15 kg, von mises stress 1.164 Mpa, displacement 0.0308 mm, dan safety factor 15.
Socio economic impacts and policy of artisanal small-scale gold mining in relation to sustainable agriculture: a case study at Sekotong of West Lombok Suhartini, S; Abubakar, A
Journal of Degraded and Mining Lands Management Vol. 4 No. 3 (2017)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2017.043.789

Abstract

Artisanal and small scale gold mining (ASGM) activities at Sekotong Sub District, West Lombok District, West Nusa Tenggara which use a traditional system have been operating since 2008. The objectives of this study were to analyze the socio-economic impacts of ASGM,  to know the policy on ASGM in West Lombok Regency, and to  formulate the policy recommendations of sustainable agricultural management which consider the ASGM activities. This study was conducted at Batu Putih and Pelangan villages of the Sekotong sub District which was chosen purposively. The research method was a case study with survey by interviewing 30 farmers with miners that were selected by a simple random sampling and field observation. A policy study was also used by interviewing key informants from many stakeholders. The results showed that ASGM activities at Sekotong improved the income of farmers/miners and created job opportunities. From the average, the ASGM mining contributed 76.01 % of farmers/miners income,  while the farming incomes was 23.99 % of total income. In 2011, West Lombok local government issued a regional regulation through a decree number 1102A/480A/Distamben/2011 about The Determination of the Artisanal Mining Area. But, after the Law of Republic Indonesia Number 23/2014 on Regional Government, the authority to give the artisanal mining permit is the Provincial Government. In terms of economics, the ASGM activities supported the agricultural sustainability. However, the environmental impact of it activities needs to be addressed with technologies which are economically viable and environtmentally sound such as phytoremediation
Co-Authors Ahmad Nayan Irfan, Said Suhartini, S Yusuf, Edy