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Mohammad Adam Jerusalem
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INDONESIA
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 61 Documents
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Smart longline: a tool to help fishermen detect fish and location with smartphone integration Kamarudin, Kamarudin; Hidayatullah, Muhammad Ragil; Novaris, M. Abizar; Purba, Riska Derliana
Journal of Engineering and Applied Technology Vol. 5 No. 2 (2024): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i2.71947

Abstract

Longline is widely used by fishermen in Indonesia. The use of longlines, which require fishermen to go back and forth periodically to check the catch, creates problems of time and fuel.  This research aims to develop a fishing tool for fishermen that will be more efficient in terms of time and fuel. The method used is a literature study related to the components to be used, the design of electrical, mechanical, interfaces and microcontroller programs, as well as the assembly of components and testing tools. The research was conducted from March to July 2022 at the Batam State Polytechnic with the test site at Nongsa Beach, Batam City. The result of this research is a smart longline prototype that can detect fish pulls using accelerometers as vibration detectors on each hook, and locate them using GPS features processed by the Mappi 32 microcontroller using LoRa communication. The information is displayed on the fishermen's smartphones. This allows the fishermen to monitor their catch without having to regularly check the longline. This tool is also equipped with a solar panel as a power source allowing it to operate for 25 hours above sea level. A future proposal for this research includes making a smart longline capable of detecting the species of fish caught. This would help fishermen analyze the species of fish in the water.
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%.
The effect of heating temperature on 3D print filament diameter consistency produced by HDPE and LDPE plastic extrusion machine Rijekki, Nanda Fajar; Sari, Nurlia Pramita; Faizin, Akhmad; Rosady, Siti Duratun Nasiqiati
Journal of Engineering and Applied Technology Vol. 5 No. 2 (2024): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i2.76071

Abstract

3D printing technology is rapidly growing in the industrial world, especially with the Fused Deposition Modeling (FDM) method that uses thermoplastic filament filaments. The manufacture of these filaments requires extrusion machines and plastic seeds, with filament diameter as the main indicator of 3D Print quality. This study aims to analyze the effect of variations in heating temperature on the consistency of the diameter of the results of extrusion machines for High Density Polyethylene (HDPE) plastics at temperatures of 160°C, 180°C, 200°C, 220°C, and 240°C and Low Density Polyethylene (LDPE) at temperatures of 160°C, 170°C, 180°C, 190°C, and 200°C. Each temperature variation has six filament samples, with the diameter measured every 1 cm for five measurements using a screw micrometer, resulting in 30 data per temperature variation. The data is processed using Statistical Process Control (SPC) and Capability Process methods. Based on data analysis with control chat, it can be concluded that each temperature variation produces diameters that are within the control limits, allowing capability process testing. Process Capability has been conditioned, resulting in large process variations compared to the established specification range, indicating imbalances and inconsistencies in filament production so that filament diameters are often out of specification limits. The conclusion of this analysis is that temperature variation has a significant effect on the consistency of filament diameter resulting from extrusion machines with HDPE and LDPE plastic seed materials. In addition, based on variations in temperature data that produce the best filaments, the temperature is 220°C for HDPE plastic and 190°C for LDPE plastic.
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.
Effect of Volume Fraction and Matrix of Forged Fibreglass Composite on Wear Rate for Brake Pad Application Wihardias, Angga Faisal; Fakhruddin, Muhammad; Muzaki, Mochamad; Pramita Sari, Nurlia
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.76251

Abstract

Brake pads are one of the components of motorised vehicles that play an important role in slowing down or stopping the vehicle. This study aims to determine the effect of using variations in volume fraction and type of resin/matrix used on the wear rate that occurs, and the temperature generated during braking by utilising glass fibre as reinforcement. The research method uses experiments where the manufacture of brake pads composites was carried out by mixing all the ingredients then poured in a mold with a curing time of 1 day and the next process was testing using a disc brake system braking simulator and a thermal imaging camera with a variation in the percentage of glass fiber 45%, 55%, 65%, 75% and the type of resin used was epoxy resin and polyester. The results of this study indicate the effect of the type of resin/matrix used on the value of the wear rate that occurs. The test results show that the smallest wear rate is owned by specimen code D of 0.000000081 g/mm2.second with epoxy as the type of resin used. Then the largest wear rate is owned by specimen A1 of 0.000000154 g/mm2.second with polyester as the type of resin. It can be concluded that the higher the density of the polymer material, the lower the wear rate. It is expected that the composite brake pads have improved physical and mechanical properties that are better than the original brake pads.
Analysis of Pipe Diameter Variation and Lamp Load on Centrifugal Pump Performance as a Generator Driving Turbine Musabbikhah, Musabbikhah; Dyaksa, Ryan Dhana
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.77745

Abstract

As the population grows, the demand for energy increases, especially from non-renewable resources. Many countries are turning to renewable energy sources such as water to meet this demand. Water from a certain height can drive a turbine generator by converting potential energy into mechanical energy in the form of shaft rotation, which is transmitted to the generator and then converted into electrical energy. This study aims to analyse variations in pipe diameter and lamp load on the performance of a centrifugal pump as a turbine driving a generator. The research method was an experiment in which the pipe diameter was varied as 1/2, ¾, 1, and 1.5 inches, and the lamp load was varied as 5, 10, 15, and 20 W. Pump performance includes specific speed, rotor power, and shaft power. The results of this study show that the performance of the centrifugal pump as a driving turbine, the highest is at a pipe diameter of 1.5 inches, which produces a specific speed of 207.59 rpm at a power load of 5 W, rotor power of 2002 watts at a load of 20 W, and shaft power of 9509.50 watts at a load of 20 W. By regression analysis, the highest specific speed was obtained by the formula y=223.16-2.9063x with a correlation coefficient of r=0.989. The rotor power formula was y=57.093+98.045x with a correlation coefficient of r=0.999, while the resulting shaft power formula was y=271.19+465.72x with a correlation coefficient of r=0.999. Thus, a strong positive relationship exists between diameter and lamp load on specific speed, rotor power, and shaft power to generate electrical energy sources in turbine axle pumps.
Design and Simulation of Carbon Steel-based Band Saw Frame Wibowo, Heri; Sutopo; Marwanto, Arif; Ahsanul Fakhr, Ardani; Riskiyanto, Aldy
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.78951

Abstract

Frame design is an important factor in ensuring optimal performance of the band saw machine due to the dynamic loads that occur during the cutting process. This study discusses the design and simulation of a band saw machine with a focus on the analysis of the strength and stability of the machine frame using carbon steel with varying thicknesses, namely 1 mm, 2 mm, and 3 mm. Simulations were performed using finite element analysis (FEA)-based software to evaluate the stress, deformation, and safety factors of each variation of steel thickness. The simulation results show that material thickness has a significant effect on the frame's ability to withstand loads. Carbon steel with a thickness of 3 mm has the best structural performance in terms of stiffness and resistance to deformation, while steel with a thickness of 1 mm shows greater deformation at the same load. Thus, choosing the right thickness is very important to ensure the efficiency and durability of the band saw machine in industrial applications.
Enhancing Measuring Reliability: Calibration and Validation of IoT-based DC Power Logger Arifa, Aulia; Suharno, Suharno; Kamaruddin, Maqbul; Harjunowibowo, Dewanto
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.83282

Abstract

A power logger is a device that has an electrical energy consumption monitoring function with an embedded data storage system to understand energy consumption patterns and improve the efficiency of energy usage. However, building meters without calibration causes inaccurate measurements and information. Therefore, the study reports a simple method to enhance any system's measurement quality via an Internet of Things (IoT)-based DC Power Logger case.  The IoT system built in the Blynk application enables the power logger to operate remotely and was integrated into a Google spreadsheet page to facilitate real-time data storage with an INA219 sensor as the measurement module. The calibration process of the power logger was conducted by comparing the measurement results obtained from the power logger with measurements obtained from a Sanwa multimeter. As a result, the calibration process ensures enhanced accuracy and precision of power logger measurements, which was validated by the validation process.
A Study on Health, Safety, Environment, and Ergonomics (HSEE) in Solar Power Plant Shafira, Dinda Aulia Ilma; Abadi, Imam
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.84689

Abstract

Solar energy has rapidly developed as a renewable energy source, but the aspects of Health, Safety, Environment, and Ergonomics (HSEE) in their operations have remained a concern. This study analysed the risks faced by workers and the environment at the Pantai Baru solar power plant using a risk analysis approach based on primary data from worker questionnaires and secondary data from literature reviews and field observations. The findings showed that the health aspect included heat stress such as prolonged under direct sunlight and exposure to toxic materials, these materials include heavy metals such as cadmium (Cd) and lead (Pb), which are commonly used in photovoltaic (PV) technology to enhance efficiency but are known to be carcinogenic and hazardous even at low doses. The safety aspect covered electrical hazards, fire hazards, and falling risks, all of which were exacerbated by suboptimal working conditions. From an environmental perspective, solar power plants caused ecosystem damage, required large land areas, and faced challenges in recycling solar panels and batteries. Ergonomic risks were also identified, but the questionnaire results indicated that musculoskeletal injuries were not a significant issue for solar power plant workers. This study concluded that most HSEE sub-variables were relevant to the risks associated with solar power plants, except for musculoskeletal injuries. Therefore, implementing risk mitigation strategies, improving workplace design, and enforcing stricter environmental policies were necessary to ensure safe, efficient, and sustainable solar power plant operations.
Numerical study of a thermoacoustic refrigerator with different stack geometries Murti, Prastowo; Dwi Astuti, Wijayanti; Febrinawarta, Burhan; Putra Pratama, Arief
Journal of Engineering and Applied Technology Vol. 6 No. 02 (2025): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i02.85682

Abstract

This study examines the performance of a thermoacoustic refrigerator with various stack geometries as a potential eco-friendly alternative to conventional refrigeration systems that rely on chlorofluorocarbons (CFCs). Thermoacoustic refrigerators create a cooling effect using sound waves and environmentally friendly gases such as helium. The stack, a crucial component where energy conversion occurs, must be optimized to maximize cooling efficiency. However, no studies have previously investigated the impact of stack geometries under a uniform system configuration. Thus, this study aims to numerically evaluate how different stack geometries and materials affect the performance of thermoacoustic refrigerators while maintaining consistent system geometry and properties to ensure fair comparison. The research focuses on three types of stack geometries: parallel plate, ceramic honeycomb, and wire mesh screen. Using DeltaEC software, the performance of these stacks was analyzed with a constant hydraulic radius. The results show that the wire mesh screen stack provides the highest cooling power (330 W) and coefficient of performance (COP) of 0.81, outperforming the other geometries. These findings highlight the potential of optimized stack designs to improve the efficiency of thermoacoustic refrigerators, promoting their development as a sustainable cooling technology.

Page 6 of 7 | Total Record : 61

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