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Asep Bayu Dani Nandiyanto
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JL. Setiabudhi No. 229 Bandung, 40154 Jawa Barat - Indonesia
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Asean Journal of Science and Engineering (AJSE)
Published by Universitas Pendidikan Indonesia
ISSN : 27766098     EISSN : 27765938     DOI : https://doi.org/10.17509/ajse.
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Engineering Materials Science & Nanotechnology
ASEAN Journal of Science and Engineering (AJSE) promotes research in the broad field of science and Engineering Education (including such disciplines as Agriculture Education, Environmental Science Education, etc.) with particular respect to Indonesia, but not limited to authorship or topical coverage within the region. Contributions are expected from senior researchers, project managers, research administrators and PhD students at advanced stages of their research, representing both public organizations and private industry. Equally, the journal if intended for scholars and students, reseachers working at research organizations and government agencies, and also for enterprises undertaking applied R&D to lead innovations. The editorial contents and elements that comprise the journal include: Theoretical articles Empirical studies Practice-oriented papers Case studies Review of papers, books, and resources. As far as the criteria for evaluating and accepting submissions is concerned, a rigorous review process will be used. Submitted papers will, prior to the formal review, be screened so as to ensure their suitability and adequacy to the journal. In addition, an initial quality control will be performed, so as to ensure matters such as language, style of references and others, comply with the journal´s style. The below mentioned areas are just indicative. The editorial board also welcomes innovative articles that redefine any Science and Technology field. Chemistry and Chemical Engineering Physics, Material, and Mechanical Engineering Biology, Biological and Bio System Engineering Food and Agriculture Engineering Mathematics Computer Science and Engineering Earth Science and Engineering Space Engineering Electrical Engineering Architecture and Civil Engineering Environment Science and Engineering Basic Science in Engineering Engineering Reforms New Technologies Industry and Education: A Continous Collaboration Research and Development in Engineering Globalisation in Engineering Women in Engineering Computers, Internet, Multimedia in Engineering Organization of Laboratories Agricultural Bio Systems Engineering Mechanical Engineering Electric and Electronic Engineering Civil Engineering and Architectural Engineering
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 125 Documents
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Analysis of Electric Vehicle (EV) Transmission Performance through Helical Rotor Gear Systems with Variable Helix Angles Hassan, Ali Raad; Jadoo, Aws Taha; Bakhy, Sadeq Hussein; Njim, Emad Kadum; Al-Maliky, Firas Thair
ASEAN Journal of Science and Engineering Vol 5, No 2 (2025): AJSE: September 2025
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v5i2.87802

Abstract

This study investigates the effect of helix angle on the performance of electric vehicle transmission systems using a helical-rotor-geared test apparatus. Several gears and pinions with different helix angles were manufactured and tested at two rotational speeds. The research combined theoretical modeling and finite element analysis to calculate natural frequencies, followed by vibration analysis using an experimental setup. The Fast Fourier Transform was applied to accelerometer data to evaluate the dynamic behavior. The results showed that larger helix angles reduced vibration amplitude and noise levels. This occurs because smoother meshing at higher angles leads to improved load distribution and lower transmission disturbances. The combination of simulation and physical testing supports the optimization of gear dynamics in electric vehicle powertrains, contributing to quieter and more efficient systems.
Enhanced Hydrogen Production from Biomass Pyrolysis using Surfactant-Modified Na-Bentonite Catalyst Irawan, Dwi; Wijayanti, Widya; Wahyudi, Slamet; Kusumo, Herma Nugroho Rono Adi; Yani, Ahmad; Wardana, I.N.G.
ASEAN Journal of Science and Engineering Vol 5, No 3 (2025): AJSE: December 2025
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v5i3.88898

Abstract

This study investigates the improvement of hydrogen gas production in biomass pyrolysis through the use of Na-bentonite catalysts modified with methyl ester sulfonate (MES), a biodegradable anionic surfactant. Corn cob powder was used as the biomass feedstock in a fixed-bed pyrolysis reactor at 550°C. The MES modification introduced alkyl, ester, and sulfonate functional groups, increasing the catalyst porosity, surface area, and acidity. Structural and chemical changes were confirmed by FTIR, XRD, UV-Vis, SEM, and EDX analyses. The MES-modified Na-bentonite catalyst significantly enhanced hydrogen production, reaching 876 ppm (a 25.11% increase compared to pyrolysis without a catalyst) and also lowered the reaction temperature and shortened the reaction time. Methane production decreased as MES improved catalyst selectivity toward dehydrogenation pathways. The results indicate that MES-modified Na-bentonite is a low-cost, efficient, and environmentally friendly catalyst suitable for improving hydrogen yields in biomass pyrolysis, offering a promising alternative to conventional metal-based catalysts.
Valorization of Imidazolium-Based Salts as Next-Generation Antimicrobials: Integrated Biological Evaluation, ADMET, Molecular Docking, and Dynamics Studies Merimi, Chaimae; Benabbou, Abdessamad; Fraj, Elmehdi; Khibech, Oussama; Yahyaoui, Meryem Idrissi; Asehraou, Abdeslam; Messali, Mousslim; Harrad, Mohamed Anouar; Challioui, Allal; Bouammali, Boufelja; Touzani, Rachid; Hammouti, Belkheir; Almutairi, Saud M.
ASEAN Journal of Science and Engineering Vol 6, No 1 (2026): (ONLINE FIRST) AJSE: March 2026
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v6i1.89789

Abstract

This study aimed to investigate the antimicrobial potential of four imidazolium-based salt derivatives (A1–A4) using an integrated approach that combined in vitro biological assays with computational analysis. The compounds were screened against various Gram-positive and Gram-negative bacteria, as well as fungal strains, while computational methods like ADMET predictions and molecular simulations assessed their viability and mechanism. The results revealed that compounds A3 and A4 possess potent antibacterial activity comparable to gentamicin, particularly against E. coli, with A3 also showing significant antifungal efficacy. These findings were strongly supported by computational analysis, which predicted favorable oral bioavailability, acceptable toxicity, and confirmed a stable binding interaction with the bacterial enzyme DNA gyrase. The primary implication is the identification of A3 and A4 as promising therapeutic candidates for developing new antimicrobials to combat drug-resistant pathogens, validating this integrated research strategy for future drug discovery.
Economic Evaluation of Household Biogas Unit Production in Supporting Public Policy on Accelerating Renewable Energy Development Apriliyani, Neng Virly; Fauziah, R. Siti Pupu; Rahmawati, Rita; Sukarelawati, S.; Agustini, A.; Kusumadinata, Ali Alamsyah
ASEAN Journal of Science and Engineering Vol 6, No 1 (2026): (ONLINE FIRST) AJSE: March 2026
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v6i1.89792

Abstract

This study explores the economic feasibility and policy relevance of household biogas production as a means to accelerate the transition toward renewable energy and sustainable development. Using an engineering economics approach, the analysis includes cost structures, break-even analysis, return on investment, and capital recovery period. Data were drawn from case studies and market-based estimates of component and operational costs. The findings reveal that despite relatively high operational expenses, production efficiency and consistent market demand ensure long-term economic sustainability. Beyond financial performance, household biogas systems enhance local energy security, reduce environmental degradation, and create community-based employment opportunities. These outcomes provide a strong empirical foundation for evidence-based policymaking, particularly in promoting decentralized energy systems and cross-sector collaboration. The initiative directly supports key Sustainable Development Goals, including clean and affordable energy, inclusive economic growth, and climate action, positioning household biogas as both a profitable and socially impactful renewable energy solution.
Techno-Economics Analysis for The Yogurt Business Development for Mustahik of Productive Zakat Purnamasari, Lise; Warizal, W.; Suherman, Irman
ASEAN Journal of Science and Engineering Vol 6, No 1 (2026): (ONLINE FIRST) AJSE: March 2026
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v6i1.89786

Abstract

The purpose of this study was to analyze the feasibility studies on the production of yogurt from raw materials of pure milk, sugar, flavor, and the addition of lactobacillus. We conducted the techno-economic analysis, which can be used by zakat mustahik for 20 years, including Total Investment Cost (TIC), Gross Profit Margin (GPM), Internal Rate of Return (IRR), Payback Period (PBP), Cumulative Net Present Value (CNPV), Break Even Point (BEP) and sales ratio to investment. The results of the study show that the CNPV/TIC analysis is a graph that tends to increase although not significantly in each period, the project in an ideal time of 20 years. This illustrates that Yogurt production is very prospective because it shows the feasibility of a profitable project. Yogurt entrepreneurs from productive zakat can support the main program of productive zakat, namely mustahik becoming muzakki in the future. The impact of this study is to provide an estimate of yogurt production as a prospective business unit for productive zakat mustahik.

Page 13 of 13 | Total Record : 125

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