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All Journal Jurnal Ilmu Perilaku METAL : Jurnal Sistem Mekanik dan Termal Andalas Journal of Electrical and Electronic Engineering Technology
Meifal Rusli
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Arts Humanities Automotive Engineering Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Kepercayaan Diri Generasi Z Indonesia Memasuki Dunia Kerja: Gambaran Self-Perceived Employability Amatul Firdausa Nasa; Meria Susanti; Lala Septiyani Sembiring; Rahmi Fahmy; Meifal Rusli; Tri Rahayuningsih; Siska Oktari; Yosea Kurnianto
Jurnal Ilmu Perilaku Vol 6 No 2 (2022): Jurnal Ilmu Perilaku
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jip.6.2.188-205.2022

Abstract

Technological advances bring transformation in employment, such as the shift of work towards digitalization. The covid-19 pandemic has also encouraged increasing technology use at work. The impact of this phenomenon is reducing the need for human resources, which increases competition in the world of work. Generation Z is a generation that currently and will face this change where they are required to have more skills so they able to compete to get and maintain their jobs.. Self-perceived employability measures individual perceptions of their ability to get and keep jobs later. This study aims to get an overview of the level of self-perceived employability in Generation Z in Indonesia by involving 1157 college students in their third and fourth years. The data was collected from 23 provinces spread across western, central, and eastern Indonesia using the online platform. The results showed that most Generation Z in Indonesia have high (67%) and moderate levels of self-perceived employability (32%). In addition, it was also found that some factors can impact increasing students' views of their employability skills. The factors are being active in organizations on campus and off campus (freelance, entrepreneurship), English proficiency (active and passive), and the Career Center in Higher Education. Keywords: World of Work, Generation Z, Indonesia, Perceived Employability
Analysis Comparison of PSMEID With Preview for Controlling Shock Vibration of UAV’s Landing Gear System Darmawan; Lovelyson; Meifal Rusli; Rahmadi Kurnia; Amirul Luthfi
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 5 No. 1 (2025): May 2025
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/ajeeet.v5i1.135

Abstract

Semi-active dampers reduce the effects of shock vibrations because they can operate at specific vibration frequencies at a lower cost than more complex active dampers.  PSMEID is one of the alternative methods developed in the semi-active damping system. PSMEID has been developed by adapting it by adding a PSMEID active time prediction system when an impact occurs. This research attempts to compare two types of PSMEID with active time prediction, where the position of each model offered has a different PSMEID mass position when applied to the landing gear damper of an Unmanned Aerial Vehicle (UAV). This comparison aims to give the user a choice among these optimal models suitable for use in multiple conditions. When simulated using the same parameter values, the PSMEID placed on the unsprung mass can reduce acceleration amplitude by up to 6.6 percent when the landing gear is dropped at 0.15 meters from the ground. The model that places the PSMEID on the sprung mass can help reduce the velocity amplitude up to 8.8 percent when dropped at a height of 0.05 meters, and the spring constant value of the PSMEID (KPS) is 1600 N/m. All these simulations show that the PSMEID should be activated just before the landing gear hits the runway surface (TB < TL).
Bolted Joint Loosening Analysis Due to Structural Vibrations using Short-Time Fourier Transform and Wavelet Transform Rahmatsyah Maksum Ramsi; Meifal Rusli; Feblil Huda
METAL: Jurnal Sistem Mekanik dan Termal Vol. 9 No. 2 (2025): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.9.2.130-138.2025

Abstract

This research investigates the influence of bolt loosening on the dynamic behavior of a steel beam structure under continuous vibration excitation for 30 minutes. Bolted joints play a critical role in maintaining structural integrity; however, loosening caused by vibration remains one of the most common failure mechanisms in mechanical structures. To capture the effect of bolt loosening, acceleration responses were analyzed using time-domain inspection, Fast Fourier Transform (FFT), Short-Time Fourier Transform (STFT), and Continuous Wavelet Transform (CWT). The experimental setup involved controlled vibration excitation applied to a steel beam with bolted connections, and response signals were recorded at different stages of loosening progression. The time-domain analysis showed a gradual reduction in acceleration amplitude as bolt tightness decreased, indicating energy dissipation and stiffness loss. FFT provided an overview of frequency content but lacked sensitivity to localized variations. STFT and CWT enabled a more detailed examination of the time-frequency domain, revealing a loss of high-frequency components and significant redistribution of energy patterns during the loosening process. Both methods successfully identified shifts in natural frequencies and variations in response amplitude. Especially, CWT exhibited superior resolution in detecting early-stage loosening compared to STFT, making it more effective for practical monitoring applications. These results highlight the potential of time-frequency analysis as a diagnostic tool for vibration-based Structural Health Monitoring (SHM) systems. Early detection of bolt loosening through non-destructive vibration analysis can improve safety, reduce maintenance costs, and extend the service life of mechanical structures.
Co-Authors Amatul Firdausa Nasa Amirul Luthfi Darmawan Fahmy, Rahmi Feblil Huda lala septiyani sembiring, lala septiyani Lovelyson Meri Susanti Rahmadi Kurnia Rahmatsyah Maksum Ramsi Siska Oktari Tri Rahayuningsih Yosea Kurnianto