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All Journal SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi Engineering Science Letter International Journal of Essential Competencies in Education Jurnal Polimesin
Ihwan Ghazali
Universiti Teknikal Malaysia Melaka
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

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Active Learning for Applied Strength of Materials Course: Evidence from NTTU Chau Thi Than; Ly Thanh Hung; Nguyen Huu Tho; Ihwan Ghazali
Engineering Science Letter Vol. 1 No. 01 (2022): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1075.995 KB) | DOI: 10.56741/esl.v1i01.154

Abstract

In the process of teaching Strength of Materials, students often find it difficult to understand and the level of achievement of the course learning outcomes is not high. Therefore, active teaching methods and application of computer aim to support students actively, proactively, and in project-based learning. This article presents the possibility of integrating the Mdsolids software in teaching strength of materials at Nguyen Tat Thanh University (NTTU) for students majoring in automotive engineering technology. The student satisfaction survey on the course and the application of Mdsolids in teaching were conducted and evaluated to test the effectiveness of active learning activities. The obtained results confirmed further evidence of the benefits of Mdsolids in supporting students to achieve the course learning outcomes.  
Exploring Students’ Critical Thinking and Curiosity: A Study on Problem-Based Learning with Character Development and Naturalist Intelligence Suhirman Suhirman; Ihwan Ghazali
International Journal of Essential Competencies in Education Vol. 1 No. 2: December 2022
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (711.176 KB) | DOI: 10.36312/ijece.v1i2.1317

Abstract

This study aimed to investigate the impact of problem-based learning with a focus on character development and naturalist intelligence on critical thinking (CT) abilities and curiosity of students. The study was conducted in a school in the city of Mataram - Indonesia, utilizing a 3x2 treatment by level design. Two groups of students, categorized as having high or low naturalist intelligence, were exposed to three different treatments: problem-based learning with character development (PBL-CD), problem-based learning, and regular learning. Data regarding the students' naturalist intelligence and CT abilities were collected through tests, while information on their curiosity was obtained through observation sheets and self-assessment. Statistical analysis using MANOVA at a significance level of 0.05 was performed. The findings revealed that: (a) PBL-CD had a positive impact on students' CT abilities and curiosity; (b) the naturalist intelligence did not significantly influence students' CT abilities and curiosity; and (c) there was no significant impact observed on students' CT abilities and curiosity when examining the interaction between PBL-CD and naturalist intelligence. Thus, PBL-CD presents itself as a viable strategy to cultivate students' critical thinking skills and inquisitiveness, offering an alternative pathway in routine learning in the classroom.
A review of solar drying architecture: Direct, indirect and mixed-mode solar dryer Permana Andi Paristiawan; Ihwan Ghazali; Dwi Aryanti; Budiarjono Budiarjono; Ayu Amanah; Muhammad Idris; Dhany Hermansyah; Esam Abu Baker Ali
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.3071

Abstract

Solar energy is available in abundance. It is considered an effective energy source for drying agricultural products. Although it is affordable, open sun drying suffers from both qualitative and quantitative issues caused by unexpected environmental conditions (rain, dust), animals (insects, birds, rodents), and over-or under-drying. Therefore, it is important to introduce a better drying technology to preserve solar energy without deteriorating the quality of the drying product. For that reason, solar dryers have been developed to produce higher drying temperatures and lower relative humidity that will eventually lead to superior drying rates and reduced final moisture contents compared to the conventional open sun drying method. Therefore, not only does the solar dryer meet the requirements of agricultural products, but it also saves energy, time, and money.
Development and Evaluation of a Laminated Bamboo Frame for Electric Scooters: A Preliminary Prototype Safarudin Gazali Herawan; Ismail Azizi Martalogawa; Azqy Nur Farenzy Saputra; Ahmad Hanif Moenartioso; Ihwan Ghazali
Engineering Science Letter Vol. 4 No. 03 (2025): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.001314

Abstract

This study presents the design, fabrication, and evaluation of a hybrid electric scooter frame constructed from laminated Gombong bamboo and aluminium. The objective was to address environmental concerns in personal mobility by reducing reliance on high-carbon materials and improving battery safety. A CAD-based design was executed in Autodesk Inventor using bamboo beams for primary structure and aluminium joints for mechanical stability. Laminated bamboo was processed through drying, chemical treatment, and gluing. Mechanical properties were evaluated via tensile and compressive tests, achieving a tensile strength of 289 MPa. A 72V lithium-ion battery pack composed of 18650 cells was assembled with BMS integration. The resulting prototype exhibited a total frame weight of 4.8 kg and a 30 km range per charge. The integration of laminated bamboo with aluminum joints provides preliminary evidence of feasibility and highlights bamboo’s potential as a renewable material for lightweight mobility applications. These results provide an initial prototype-level demonstration of laminated bamboo as a viable material for sustainable transport applications.
Advantages and Challenges of VR in Engineering Education Ayu Amanah; Ihwan Ghazali; Handi; Yusrizal; Iwan Setiono
Engineering Science Letter Vol. 5 No. 02 (2026): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.002117

Abstract

Virtual reality (VR) technology has the potential to revolutionise engineering education by providing students with immersive and interactive learning experiences not possible with conventional methods. Virtual reality can be used to simulate real-world environments and equipment, teach engineering concepts and principles, and prepare students for industry practices. However, the use of Virtual Reality in engineering education presents challenges, such as the limited availability and expense of VR equipment, the need for technical support and training for faculty and students, and the requirement for the creation and maintenance of Virtual Reality content. This issue was developed based on a narrative review and a literature review. The narrative review was conducted after the author studied and gathered the latest information. To effectively implement VR in engineering education, it is necessary to weigh the advantages and disadvantages of the technology and allocate resources accordingly. The benefit of VR in engineering education is increased accessibility to simulations and hands-on learning experiences, increased student engagement and motivation, the ability to visualize and manipulate 3D objects and concepts in a realistic environment, and the chance to safely test and experiment with equipment and processes. Future use of augmented reality (AR) and mixed reality (MR) technology in engineering education might provide students with even more immersive and interactive learning experiences. The use of Virtual Reality in engineering education has the potential to transform how engineering is taught and learnt by offering students more interesting and interactive learning experiences that better prepare them for success in the field.
A Systematic Review on Industrial 4.0 Readiness for Environmental Sustainability Considering Cultural Influences Nasri Semiun; Ihwan Ghazali; Effendi Mohamad; Tia Tanjung
Engineering Science Letter Vol. 4 No. 01 (2025): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.00735

Abstract

 This systematic literature review (SLR) investigates the development of sustainability guidelines tailored for Industry 4.0, emphasizing the influence of cultural factors and the multidimensionality of existing sustainability models. Industry 4.0 represents a pivotal shift in industrial operations, integrating advanced technological innovation with a human-centric focus to achieve sustainability goals. Cultural factors, however, play a crucial role in shaping the success of such initiatives. This research examines how the various dimensions of sustainability models are influenced by cultural considerations and provides a comprehensive analysis of their impact on Industry 4.0 readiness. The findings of the SLR underscore that aligning technology with local cultural values, engaging stakeholders across diverse societal levels, and fostering capacity-building through culturally relevant training and education are vital to enhancing the effectiveness of sustainability practices. The proposed guidelines advocate for incorporating cultural analysis during the early planning phases, developing culturally sensitive communication strategies, formulating adaptable and flexible policies, and promoting international collaboration that respects cultural diversity. This study contributes valuable insights into the dynamic interplay between cultural influences and sustainability within the Industry 4.0 framework, emphasizing the importance of culturally responsive strategies for achieving enduring sustainable outcomes.
Pencegahan Korosi pada Permukaan Baja Menggunakan Bio-Inhibitor yang Diekstrak dari Kulit Nanas Yuli Panca Asmara; Mujiburrahman; Irawan Noor; Ihwan Ghazali; Agus Wiramsya Oscar; Firda Herlina; Muhammad Renaldy Syahputra
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 12 No 2 (2026): August
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol12.no2.a23548

Abstract

Corrosion is a major problem affecting the durability of steel materials, creating a need for effective and environmentally friendly corrosion-control methods. This study evaluated the effectiveness of pineapple peel extract as a corrosion inhibitor for ST 42 steel in rainwater at immersion durations of 7 and 20 days. The gravimetric weight-loss method was used to determine the corrosion rate based on the mass loss of the steel specimens. Six ST 42 steel specimens were used individually for the experimental conditions, with one specimen representing each condition. Uninhibited specimens were immersed in rainwater and seawater for comparison, while pineapple peel extract was evaluated as an inhibitor only in rainwater. The uninhibited ST 42 specimens immersed in rainwater showed corrosion rates of 0.0952 and 0.1000 g/(cm²·day) after 7 and 20 days, respectively. In contrast, the specimens treated with pineapple peel extract showed no measurable mass loss, resulting in a calculated corrosion rate of 0.0000 g/(cm²·day) at both immersion durations. The calculated inhibition efficiency of the pineapple peel extract was therefore 100% at both 7 and 20 days. The uninhibited specimens in seawater showed corrosion rates of 0.0952 and 0.1000 g/(cm²·day) after 7 and 20 days, respectively, which were identical to those observed in rainwater. These results indicate the potential of pineapple peel extract as a plant-based corrosion inhibitor for ST 42 steel in rainwater under the tested conditions. However, the results should be interpreted cautiously because each condition was represented by a single specimen and the resolution of the digital scale was not documented.
Co-Authors Agus Wiramsya Oscar Ahmad Hanif Moenartioso Ayu Amanah Azqy Nur Farenzy Saputra Budiarjono Budiarjono Chau Thi Than Dhany Hermansyah Dwi Aryanti Effendi Mohamad Esam Abu Baker Ali Firda Herlina Handi Irawan Noor Ismail Azizi Martalogawa Iwan Setiono Ly Thanh Hung Muhammad Idris Muhammad Renaldy Syahputra Mujiburrahman . Nasri Semiun Nguyen Huu Tho Permana Andi Paristiawan Safarudin Gazali Herawan Suhirman Suhirman Tia Tanjung Yuli Panca Asmara Yusrizal