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All Journal Indonesian Journal of Science and Technology Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin)
Ramdhani Ramdhani
Universitas Pendidikan Indonesia
Computer Science & IT Education Environmental Science Mechanical Engineering

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ANALISIS ERGONOMI MENGGUNAKAN METODE QUICK EXPOSURE CHECKLIST PADA PRAKTIKAN BIDANG KEAHLIAN CHASSIS OTOMOTIF Ramdhani, Ramdhani; Noor, Ridwan A. M.
Journal of Mechanical Engineering Education Vol 5, No 1 (2018): Juni
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v5i1.12624

Abstract

Penelitian ini bertujuan untuk mengetahui seberapa besar tingkat risiko ergonomi pada saat praktik chassis otomotif pada kompetensi roda dan ban. Penelitian ini merupakan penelitian deskriptif kuantitatif. Subjek pada penelitian ini diambil menggunakan teknik sampling jenuh yaitu mahasiswa Departemen Pendidikan Teknik Mesin konsentrasi otomotif angkatan 2014. Pengumpulan data dengan dengan cara teknik observasi dan kuesioner. Instrumen pengumpulan data terdiri dari dari lembar observasi dan kuesioner. Metode yang digunakan untuk menganalisis posisi tubuh adalah Quick Exposure Checklist (QEC) . Metode QEC menganalisis pajanan pada  punggung, bahu/lengan, pergelangan lengan/lengan, dan leher. Metode ini tidak hanya menilai pajanan pada tubuh tetapi durasi, beban benda kerja, dan tingkat kesulitan pekerjaan masuk kedalam kriteria penilaian. Kompetensi roda dan ban dipilih karena dinilai memiliki tingkat resiko ergonomi yang tinggi. Pada tubuh persentil 95 didapat 59%, tubuh persentil 50 didapat 59%, tubuh persentil 5 didapat 52,2%, yang berarti harus diselidiki dan segera dirubah untuk mengurangi risiko ergonomi. Peneliti menyarankan alat bantu praktik  untuk mengangkat dan memindahkan beban yang bisa disesuaikan menurut data antropometri.
ERGONOMIC ANALYSIS OF TRANSMISSION OVERHAUL PRACTICES WITH THE RULA METHOD IN THE DEPARTMENT MECHANICAL ENGINEERING EDUCATION Ramdhani Ramdhani; Excellent Demolka Peranginangin
Journal of Mechanical Engineering Education Vol 9, No 2 (2022): Desember 2022
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v9i2.52829

Abstract

This research was conducted to determine the work posture and the level of ergonomics risk in the transmission overhaul practice activity which later resulted in recommendations for designing ergonomic practical tools based on anthropometry of students from the Department of Mechanical Engineering Education UPI. Descriptive method through a cross-sectoral approach is used to answer the objectives of this study. Instruments such as anthropometric questionnaires regarding the dimensions of student body measurements include data on upright height, length of arm span to the side, and length of arm forward. The Rapid Upper Limb Assessment (RULA) questionnaire was also used for ergonomic risk level data requirements. The data that has been obtained is then processed by means of a data uniformity test, data adequacy test, and percentile calculation to determine 3 students who represent body size at the 5th, 50th, and 95th percentiles and continue to practice transmission overhaul which will be observed through a questionnaire. The results of data processing in this study explained that students' unusual work postures such as the neck upturned, legs bent, and the position of the hands reaching upwards for a long enough duration to cause aches and pains after the practice was over. This is evidenced by the acquisition of an overall score of 7 which means it is necessary to investigate and make changes to the process as well as the tools used in the transmission overhaul practice.
Biomass-Based Supercapacitors Electrodes for Electrical Energy Storage Systems Activated Using Chemical Activation Method: A Literature Review and Bibliometric Analysis Ida Hamidah; Ramdhani Ramdhani; Apri Wiyono; Budi Mulyanti; Roer Eka Pawinanto; Lilik Hasanah; Markus Diantoro; Brian Yuliarto; Jumril Yunas; Andrivo Rusydi
Indonesian Journal of Science and Technology Vol 8, No 3 (2023): (ONLINE FIRST) IJOST: December 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i3.60688

Abstract

Currently, carbon derived from biomass waste or residues is being intensively utilized as electrodes due to its excellent electrical properties, including high conductivity, appropriate porosity, and a specific surface area suitable for supercapacitor applications. Despite its advantages, the performance of supercapacitors made from biomass-derived carbon is insufficient for engineering applications because of the challenges in obtaining the mesoporous structure of activated carbon (AC). Therefore, this study highlights the potential of biomass-based carbon as the electrodes of a highly efficient supercapacitor, which can facilitate highly efficient current transport in energy storage systems. It comprehensively discusses various biomass material sources and activation methods to produce carbon, with a focus on the physical and electrical properties. Initially, the study discusses carbon activation methods and mechanisms to understand why activating agents and electrolyte solutions have a high specific surface area and specific capacitance. It then concentrates on the chemical activation method and its importance in making AC useful as an efficient electrode. Finally, in this study, various biomass sources were discussed to highlight the performance of supercapacitors electrodes originating from agricultural and wood residues relating to the specific capacitance and capacitance retention. Based on the obtained results, it is concluded that biomass-based carbon materials could be the most advantageous platform material for energy conversion and storage.
Co-Authors Andrivo Rusydi Apri Wiyono Brian Yuliarto Budi Mulyanti Excellent Demolka Peranginangin Ida Hamidah Jumril Yunas Lilik Hasanah Markus Diantoro Noor, Ridwan A. M. Roer Eka Pawinanto, Roer Eka