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Mohammad Adam Jerusalem
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Journal of Engineering and Applied Technology
Published by Universitas Negeri Yogyakarta
ISSN : 27162257     EISSN : 27162265     DOI : https://doi.org/10.21831/jeatech
Core Subject : Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering
Journal of Engineering and Applied Technology (JEATech) is an open-access double-blind peer-reviewed journal of Engineering, Technology, and Applied Technology. Authors are invited to disseminate theoretical and practice-oriented topics relevant to: Electrical Engineering Electronic Engineering Informatics engineering Computer Science Mechatronics Engineering Mechanical Engineering Automotive Engineering Civil Engineering Industrial Engineering Applied technology related to the previous fields of engineering
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 5 No. 1 (2024): (March)" : 5 Documents clear
Design of website-based Preventive Maintenance Checklist Smart System (PMCSS) to support the operation of ARFF vehicles at I Gusti Ngurah Rai Airport Bagus Arya Dwipa, I Gusti Ngurah; Abdullah, Anton; Martadinata, M. Indra; Komalasari, Yeti; Amalia, Direstu
Journal of Engineering and Applied Technology Vol. 5 No. 1 (2024): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i1.67708

Abstract

This design aims to increase the preparedness of Airport Rescue and Fire Fighting (ARFF) vehicles in supporting operations at I Gusti Ngurah Rai Airport by creating a website-based preventive maintenance application. This research was based on initial observations on the effectiveness level of preventive maintenance systems for operational vehicles that still apply conventional systems so that they are prone to human error. The research and development method was used in this study, including stages namely potential issues, information gathering, product design, product validation, product repair, product trial, and product revision. This study shows that the validation carried out obtained an average percentage of 81.5% with a very decent category. Based on the research results and discussion, it can be concluded that the website-based PMCSS application is effective in supporting ARFF operational vehicles at I Gusti Ngurah Rai Airport.
Experimental study: coolant viscosity's impact on Inconel 600's surface roughness measured using a refractometer Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Manurung, Meilani Mandalena; Batubara, Ninda Hardina; Widiastuti, Hanifah
Journal of Engineering and Applied Technology Vol. 5 No. 1 (2024): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i1.71254

Abstract

This paper presents an experimental study on the impact of coolant viscosity on the surface roughness of Inconel 600 material processed using a lathe. This research employs sequential experimental methods, encompassing a coolant viscosity test, specimen machining with a lathe, and surface roughness test. The standard for the roughness grade number is defined by ISO 1302. The study effectively demonstrates the use of a refractometer as a reliable and practical alternative for determining coolant quality in % Brix units, which strongly correlates with coolant viscosity. The research findings reveal that an increase in coolant viscosity results in a smoother surface roughness of the workpiece, while a decrease leads to an increase in surface roughness. Specifically, the average viscosity of 8%, 10%, and 13% Brix coolant results in an average surface roughness of Ra 11.83 μm, Ra 10.09 μm, and Ra 7.23 μm, respectively. The average roughness grade number based on this study is N9 - N10. However, the study also identifies the need for further mathematical calculations to establish a link between coolant concentration, % Brix, and coolant viscosity. This opens up an intriguing avenue for future research and holds the potential to significantly enhance our understanding of the relationship between these variables.
Feasibility Assessment of Construction 4.0 Technology Investment: Drones, Building Information Modeling (BIM) and Virtual Reality (VR) Safira, Herdiana; Tanne, Yongki Alexander; Maarif, Muhamad Samsul
Journal of Engineering and Applied Technology Vol. 5 No. 1 (2024): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i1.71123

Abstract

Construction 4.0 technology is an anticipation of the challenges of quality improvement in the construction industry. However, its implementation has not been simultaneous with an evaluation of the benefits and value of investment. For this reason, this research evaluates the benefits and investment feasibility of construction 4.0 technology on 36 projects of the Indonesian construction state-owned enterprise (SOE), PT. XYZ Persero Tbk. during 2020-2022 for Drones, Building Information Modeling (BIM) and Virtual Reality (VR) as individually and integrated. Based on evaluation data on the use of technology and financial data from technology investments obtained, this research quantitatively calculates the value of the benefits of increasing productivity and then calculates the financial evaluation using the Return on Investment (ROI), Net Present Value (NPV), Internal Rate of Return (IRR) and Benefit-Cost Ratio (BCR) methods and implies those results qualitatively. As a result, individually, BIM is the technology that contributes the most in terms of benefits, VR contributes well in terms of investment value, while drones still have development potential. Integration between technologies is still challenging where the use of technology simultaneously does not guarantee significant integration between the three technologies reviewed in this research. 
Soil liquefaction measurement and adjustment system on shaking table for seismic simulation Abdul Karim, Mahmud; Aulia Sakinah, Dea; Nugroho Nuradryanto, Dimas; Setiowati, Sulis; Novita Wardhani, Rika; Salimah, A'isyah; Yelvi, Yelvi
Journal of Engineering and Applied Technology Vol. 5 No. 1 (2024): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i1.65479

Abstract

The liquefaction simulator tool uses a one-axis shaking table model to determine soil features and behaviour that indicate liquefaction. This helps in implementing measures to mitigate its effects. The research system incorporates a frequency regulation system to control the speed of the 3-phase motor and a measurement system that monitors various variables associated with liquefaction. The variables include displacement, rocking table motion, acceleration, vibration frequency, and pore water pressure. This study used LabVIEW for frequency adjustment, data acquisition, processing, and presentation. LabVIEW improved the observations' accuracy using the linear regression method and descriptive statistical analysis at the data processing stage. The error value for the frequency adjustment without load was 1.65%, which increased to 8.75% when a load was applied. This study achieved a displacement measurement accuracy of 99.03% and an average pore water pressure measurement accuracy of 95.69%. The measurement accuracy of the accelerometer and accelerometer vibration frequency reached 66.98%.
Stereolithography 3D printing for the investigation of acoustic focusing Febrinawarta, Burhan; Miasa, I Made; Widyaparaga, Adhika; Sucipto, Sucipto; Premiaji, Witnadi Dardjat
Journal of Engineering and Applied Technology Vol. 5 No. 1 (2024): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i1.71672

Abstract

In our environment, acoustic sound waves transform into undesirable noise when their intensity exceeds 100 dB, prompting a need for effective mitigation strategies. In recent years, there has been increasing interest in utilising sound/noise and acoustics for energy harvesting, especially for low-power electronic devices committed to clean renewable energy sources. Metamaterials, with a spotlight on metalens, are emerging as a promising solution for precise sound focusing and energy conservation. This study delves into the intricate process of fabricating metalens through Stereolithography (SLA) 3D printing, unravelling their acoustic focusing capabilities. Metalenses, equipped with intricately designed labyrinthine unit cells tailored for manipulating reflected wave phases, materialize through the precision of SLA 3D printing, forming a sophisticated multilateral structure. The experimental framework for acoustic focusing integrates essential components such as a waveguide, speaker array, metalens, acoustic foam, and a sound level meter. The resultant metalens, composed of 22-unit cells with diverse dimensions, distinctly demonstrate robust acoustic focusing capabilities. Calibration procedures are systematically applied to ensure uniformity of speaker array output and to create a carefully controlled acoustic environment. Sound level measurements clearly depict zones of mutually reinforcing resonance heights, while, conversely, there are also zones of mutually attenuating sound. The complex interplay of sound waves through the metalens, intricately guided by the design of the unit cells, decisively determines the degree of acoustic focus achieved. The SLA 3D printed metalens emerges as a compelling manifestation of effective sound concentration, poised for potential applications in the realm of acoustic energy harvesting. Nevertheless, the study's consequential findings beckon further scientific exploration, prompting an in-depth comprehension of the nuanced impacts of input frequency and potential heating phenomena.

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