Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
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All Journal Journal of Engineering Science and Technology Management
Pratiwi, Nurul Dwi
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering

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Analysis of the Use of Generators and Rectifier Regulators as Additional Charging Systems for BLDC-Based Electric Bicycles Pratiwi, Nurul Dwi; Muhammad, Rahmadis; Fiatno, Aris
Journal of Engineering Science and Technology Management (JES-TM) Vol. 3 No. 2 (2023): September 2023
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v3i2.114

Abstract

The development of technology and mobility has encouraged humans to innovate and create environmentally friendly means of transportation and can reduce dependence on fuel oil which will eventually run out. Currently, transportation equipment using electrical energy is starting to appear as an alternative energy source, including electric bicycles. In this research, electric bicycles were produced equipped with generators and rectifiers to produce additional electrical energy. The generators utilizes the rotation of the front wheels to produce electrical energy which is then channeled through the rectifier and stored in the battery. This research aims to determine the benefits of using generators and rectifiers as additional charging systems for BLDC-based electric bicycles by conducting direct road test of electric bicycles. The result show that the use of a generator and rectifier can increase the distance traveled by up to 2 km. An electric bicycle with a capacity of 24V x 14 Ah can over a distance of 13 km without a generator and 15 km with a generator.
Analysis of Employee Work Posture at Sorting and Boiler Stations of PT Mitra Bumi Using the OWAS Method Almahera, Piki; Chen, An; Sari, Resy Kumala; Adeswastoto, Hanantatur; Pratiwi, Nurul Dwi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 4 No. 1 (2024): Maret 2024
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v4i1.147

Abstract

Activities at sorting stations and boilers are high risk activities. Incorrect body posture, done repeatedly and relying on manual human power causes musculoskeletal disorders (MSDS). This research aims to analyze MSDs disturbances in body parts of workers at sorting  stations and boilers using the Ovako work posture analysis system (OWAS) method. OWAS can identify four body parts in a worker's posture, namely the back, upper arms, legs and weight category. Based on the results of the OWAS assessment, a score of  4144 was obtained at the sorting station, and 4141 at the boiler station. Both scores are in category 4, which means improvements need to be made as soon as possible. The injury risk index reached a value of 400 for both stations, indicating a very high level of danger.
Co-Authors Adeswastoto, Hanantatur Almahera, Piki Aris Fiatno Chen, An Muhammad, Rahmadis Sari, Resy Kumala