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Rahmat Azis Nabawi
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INDONESIA
Journal of Engineering Researcher and Lecturer
Published by Researcher and Lecturer Society
ISSN : -     EISSN : 29637511     DOI : 10.58712/jerel
Core Subject : Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Education Engineering Mechanical Engineering
The Journal of Engineering Researcher and Lecturer is dedicated as a forum for researchers and lecturers around the world to report the research results. All papers are peer-reviewed by at least two referees. The scope includes technological and learning innovation in engineering (miscellaneous). Technological innovation must be carried out continuously for a better life. However, its sustainability is inseparable from human resources. Thus, manuscripts on learning innovation are expected to be a reference in decision-making for a policy on engineering education, resulting in superior students in a sustainable manner. Technological innovations are expected to be a learning reference and can be mastered by students for sustainable human resource development.
Arjuna Subject : Ilmu Pengambilan Keputusan (semua kategori) - Ilmu Pengambilan Keputusan (Lain-Lain)
Articles 97 Documents
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Enhancing vocational education through augmented reality: Android-based learning media for CNC TU-2A instruction in technical and vocational high schools Salim, Rezky Azhari; Syahril, Syahril; Erizon, Nelvi
Journal of Engineering Researcher and Lecturer Vol. 4 No. 2 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i2.188

Abstract

The rapid evolution of digital technologies has opened new opportunities for transforming vocational education, particularly in CNC (Computer Numerical Control) machining. Despite its vital role in preparing skilled workers, CNC instruction in Indonesian vocational schools remains constrained by teacher-cantered methods, static materials, and limited access to costly machines, resulting in low engagement and achievement. This study aimed to design, implement, and evaluate Android-based Augmented Reality (AR) learning media for CNC TU-2A machines to enhance students’ cognitive performance, psychomotor skills, and classroom participation. Using a Classroom Action Research (CAR) model across two cycles, the research involved 31 eleventh-grade Mechanical Engineering students at SMK Negeri 5 Padang. Data were collected through cognitive tests, student activity observations, and surveys. Results showed significant improvements: average cognitive scores rose from 75.91 to 82.47, classical mastery increased from 54.83% to 100%, and psychomotor scores improved by 3.24 points. Student learning activities also climbed from 72.2% to 80.4%, with discussion and collaboration showing the highest gain (17%). While barriers such as device limitations and technical issues arose, they were addressed through device sharing, offline content, and teacher mentoring. Findings confirm AR as an effective, scalable tool for modernizing CNC instruction, fostering engagement, and preparing vocational students for Industry 4.0 learning demands.
Automated drip rate monitoring and control system for intravenous fluids of varying viscosities Suarez, Justin; Macas, Allain Jessel
Journal of Engineering Researcher and Lecturer Vol. 4 No. 3 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i3.192

Abstract

Nurses play an essential role in society by advocating for health promotion, educating the public and patients on injury and sickness prevention, engaging in rehabilitation, and giving care and support. However, increasing patient loads significantly affect nurses’ available time for critical tasks, such as monitoring intravenous (IV) fluid flow. The accuracy of IV administration can also be affected by the viscosity of the infused fluid, making precise drip rate control challenging. This study aims to develop a cost-effective IV fluid monitoring and flow rate control device using a Raspberry Pi Pico microcontroller board. The device would enable nurses to monitor and control the IV drip rate accurately and easily. The accuracy of a prototype sensor for measuring drip rates in different fluids with varying viscosities is evaluated through comparison with a manual method. The results indicate that the experimental method shows good agreement and accuracy compared to the manual method, with minor biases and acceptable ranges of differences. Control charts demonstrate higher precision in the experimental method, indicating stable and consistent measurements. Overall, the findings suggest that the prototype is effective in measuring drip rates and has potential for drip rate monitoring applications. The prototype demonstrated excellent performance in handling fluids of varying viscosities, surpassing 85%. The average percentage errors were 7.5% for Sodium Chloride, 7.67% for Hetastarch, and 8.09% for fresh milk. The prototype demonstrates the ability to enhance safety and precision in IV infusions.
Nickel mining on small islands and the conservation mandate: A regulatory review and policy analysis based on the Raja Ampat case study Zahar, Wahyudi; Rosyid, Fadhila Achmadi
Journal of Engineering Researcher and Lecturer Vol. 4 No. 3 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i3.195

Abstract

Indonesia plays a strategic role in global mineral supply, but the expansion of mining into coastal–small-island areas demand governance that balances down streaming objectives with the conservation mandate. This article presents a regulatory review and policy analysis illustrated by the Raja Ampat case. The policy framework examined includes Government Regulation (PP) No. 25 of 2024, Ministry of Energy and Mineral Resources Regulation (Permen ESDM) No. 15 of 2024, and Ministerial Decree (Kepmen ESDM) No. 177.K/MB.01/MEM.B/2024. The analysis shows that: (i) licensing and enforcement instruments have been strengthened, as reflected in corrective actions against non-compliant permits; (ii) in small-island contexts with high conservation value, the principal risks stem from sedimentation and declining water quality, which affect coral-reef ecosystems and fisheries–tourism livelihoods; and (iii) the effectiveness of regulations is highly determined by consistency of implementation, data traceability, and public participation. Policy recommendations include indicator-based enforcement (quarterly inspections and an RKAB compliance dashboard), a sediment-focused “AMDAL+” environmental impact assessment for coastal–reef settings, synchronizing a “small-island/geopark” filter in WIUP/WIUPK designation, supply-chain transparency, and strengthening local economic alternatives that are compatible with conservation. The findings affirm that a balance between economic growth and ecosystem sustainability can be achieved through a combination of stringent licensing screening, adaptive monitoring, and transparent governance.
Simulation–adventure virtual worlds in the metaverse for engineering education and training: A domain-stratified narrative review Fortuna, Aprilla; Raihan, Muhammad; Saputra, Dimas Aulia; García, Juan Luis Cabanillas; Ayasrah, Firas Tayseer
Journal of Engineering Researcher and Lecturer Vol. 4 No. 3 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i3.191

Abstract

This study employs a narrative review methodology to analyze the integration of Virtual Worlds, specifically Simulation Worlds and Adventure Worlds, in engineering education, aiming to enhance conceptual understanding, technical competence, and 21st-century skills. The study synthesizes 23 peer-reviewed articles selected from the Scopus database using stringent inclusion criteria. Simulation-based learning models focus on procedural accuracy and conceptual mastery, while adventure-based models emphasize transversal skills like creativity, collaboration, and problem-solving. Hybrid models combining both approaches are identified as the most effective, fostering technical expertise and soft skills simultaneously. Despite challenges such as high infrastructure costs and potential cognitive overload, immersive virtual environments offer significant opportunities for scalable and adaptable remote learning. Thematic analysis is employed to synthesize findings and provide recommendations for future implementation. This review highlights the importance of integrating these technologies in engineering education and suggests exploring their long-term impact on engineering careers. Additionally, it underscores the need for further research on the application of immersive technologies across diverse engineering disciplines, focusing on overcoming existing challenges and maximizing their educational potential.
Influence of fiber content and applied load on the wear mechanisms of oil palm frond fiber/phenol-formaldehyde composites with functional fillers Istana, Budi; Hasan, Indra; Winangun, Kuntang
Journal of Engineering Researcher and Lecturer Vol. 4 No. 3 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i3.198

Abstract

The tribological behavior of oil palm fiber (OPF)-reinforced polymer composites was investigated with varying fiber contents (10, 20, and 30 wt.%) under different applied loads (20, 40, and 60 N) at a sliding speed of 2.5 m/s. Experimental results show that wear rate decreases significantly with increasing fiber content up to 20 wt.% at all loads, reaching minimum values of 1.2, 2.1, and 3.9 ×10-4 mm³/Nm at 20, 40, and 60 N, respectively. Beyond 20 wt.%, wear rate increases, indicating fiber agglomeration and interfacial defects at higher loadings. A second-degree polynomial regression model was developed to predict wear rate as a function of fiber content and load. Model analysis and contour mapping identified an optimum wear resistance region centered at 20 wt.% fiber content and ~35–45 N load. The improved wear performance at this composition is attributed to enhanced fiber–matrix adhesion, improved stress transfer, and reduced microstructural discontinuities. These findings suggest that OPF composites with 20 wt.% reinforcement provide optimal wear resistance under moderate load conditions, making them promising candidates for tribological applications such as automotive and industrial components.
Comparative static structural assessment of an energy-efficient prototype vehicle chassis using finite element analysis: AISI 1020 steel vs. 6061-T6 aluminum Andira, Muhammad Fadil; Afnison, Wanda; Waskito, Waskito; Sari, Delima Yanti
Journal of Engineering Researcher and Lecturer Vol. 4 No. 3 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i3.199

Abstract

This study evaluates the static structural performance of a Prototype-class energy-efficient vehicle chassis for the Indonesian Kontes Mobil Hemat Energi (KMHE; Energy-Efficient Car Competition) by comparing two material options, AISI 1020 carbon steel and Al 6061-T6, under a consistent load representation. Three-dimensional chassis models were developed in SolidWorks and assessed using static finite element analysis (FEA). The loading scenario included gravitational body force and two concentrated static loads representing operational conditions: 700 N applied at the driver seat region and 300 N applied at the engine mounting area. A curvature-based meshing strategy was adopted, with element sizes ranging from 1.6 to 8 mm, resulting in approximately 1,700,093 nodes to capture geometric details in joints and curved members. The AISI 1020 chassis produced a maximum von Mises stress of 278.6 MPa concentrated near the engine mounting joint, a maximum total deformation of 2.1 mm in the roll-bar region, and a minimum factor of safety of 1.3. In contrast, the Al 6061-T6 chassis exhibited a lower peak stress of 61 MPa at the rear wheel mounting region, a higher deformation of 3.4 mm at the roll bar, and a factor of safety of 4.5. The findings confirm a trade-off between stiffness and safety margin: steel offers higher stiffness but an insufficient safety margin, while aluminium significantly improves the static safety margin with increased deformation. These results provide design guidance for reinforcing critical regions and enhancing the robustness of competition-ready chassis.
Experimental study on the use of wood pellet briquettes in rocket stoves for household energy needs Irianto, Rafki; Fernanda, Yolli; Primawati, Primawati; Yuvenda, Dori
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.206

Abstract

This experimental study investigates the effect of air supply configurations on the combustion performance and thermal efficiency of wood pellet briquettes in rocket stoves for household energy use. With increasing global demand for energy and the depletion of fossil fuels, the shift to renewable biomass fuels, such as wood pellets, is essential to reduce carbon emissions and enhance energy efficiency. The study evaluates four airflow configurations: right fan only (F3), lower-left + right fans (F2+F3), two left fans (F1+F2), and all fans (F1+F2+F3). The results show that the F3 configuration achieved the fastest boiling time, highest boiling temperature, and lowest heat-loss temperature, indicating superior thermal performance. In contrast, configurations with higher airflow (F1+F2 and all fans) led to greater heat losses and slower boiling times, suggesting that excessive airflow can negatively affect efficiency. Additionally, the analysis of residual mass revealed that F3 and F2+F3 configurations produced the lowest residuals, indicating more complete combustion. This study provides important insights into optimising airflow configurations to improve the efficiency of biomass stoves. The findings offer practical implications for the design and operation of sustainable cooking technologies, promoting energy efficiency and reducing reliance on fossil fuels in households, particularly in rural areas.

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