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Andalasian International Journal of Applied Science, Engineering, and Technology
Published by Universitas Andalas
ISSN : -     EISSN : 27970442     DOI : https://doi.org/10.25077/aijaset
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering
The Andalasian International Journal of Applied Science, Engineering, and Technology (AIJASET) is an international journal dedicated to the improvement and dissemination of knowledge on applied science, engineering and technologies including energy, environment, industrial, agriculture, civil, transportation, Information and communication and other related sciences and engineering. AIJASET follows new trends and advanced technology for practical applications of appropriate technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 12 Documents
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Search results for , issue "Vol. 5 No. 3 (2025): November 2025" : 12 Documents clear
Content Validity Evaluation of a Public Transport Service Assessment Tool Integrating Service Quality, Satisfaction, and Behavioral Intentions Yanis, Muhammad; Saleh, Sofyan M; Achmad, Ashfa; Sari, Laina H
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.125

Abstract

Public transportation services are essential in supporting urban mobility and sustainability. However, valid and reliable measurement tools for assessing service quality, user satisfaction, attitudes, and behavioral intentions toward public transportation remain limited. This study aimed to evaluate the content validity of a newly developed assessment instrument designed to measure those constructs. A panel of eight experts representing academia, government, and public transport practitioners was engaged to review the relevance and representativeness of each item using Content Validity Ratio (CVR) and Content Validity Index (CVI). Experts rated each item on a four-point scale of relevance. Items with a CVR value greater than 0 indicating excellent content validity. Two items were revised based on expert recommendations to improve clarity and conceptual accuracy. These findings demonstrate that the instrument is a valid and representative tool for evaluating public transport service quality and user perceptions. Further testing is recommended to establish the construct validity and reliability of the instrument for broader application in transport policy, service evaluation, and behavioral studies.
Solving Heterogenous Fleet Capacitated Vehicle Routing Problem with Time Windows Using Cooperative Hybrid Firefly Algorithm Ananda, Defri; Wirdianto, Eri; Alfandi, Rahmad
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.154

Abstract

The Vehicle Routing Problem with Time Windows (VRPTW) is a widely studied logistics optimization problem, and its complexity increases when heterogeneous fleets are considered. This study proposes the application of the Cooperative Hybrid Firefly Algorithm (CHFA), an extension of the Firefly Algorithm, to solve the Heterogeneous Vehicle Routing Problem with Soft Time Windows (HVRPSTW). The mathematical model was implemented in Python, tested on benchmark datasets, and adapted to a fleet consisting of three vehicle types with different capacities to serve 100 customers. The proposed CHFA achieved feasible routing solutions with a total transportation cost of IDR 17.58 million and a computation time of only 30 seconds. These results demonstrate that CHFA can provide fast and efficient solutions for complex routing problems, making it highly applicable in logistics operations that demand quick decision-making and cost efficiency.
Comparison of Seismic Performance of Shear Wall and Bracing Systems in Residential Flats in Silangkitang Village North Tapanuli Abiyyu, Muhammad Fauzan; Hasibuan , Samsul Abdul Rahman Sidik
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.191

Abstract

Indonesia lies within the Pacific Ring of Fire at the convergence of three major tectonic plates, making earthquake-resistant design a critical challenge for multi-story buildings. Structural systems such as reinforced concrete shear walls and steel bracing are commonly employed to enhance lateral load resistance. This study evaluates and compares the seismic performance of shear wall and bracing systems in a three-story residential flat located in Silangkitang Village, North Tapanuli, using nonlinear static (pushover) analysis conducted in ETABS v18. The analysis results indicate that, in the X-direction, the shear wall structure achieves a total displacement of 66.84 mm with a base shear of 8512.78 kN, whereas the braced structure exhibits a total displacement of 119.19 mm with a base shear of 9773.20 kN. In the Y-direction, the shear wall structure records a total displacement of 166 mm and a base shear of 13,228.69 kN, while the braced structure achieves 173 mm and 8210.53 kN, respectively. These findings demonstrate that, although both systems satisfy the same structural performance level criteria, the shear wall system provides superior lateral stiffness and more favorable displacement characteristics compared to the bracing system.
Front End Design Of Design Asset Sales Information System With Human Centered Design (HCD) Approach Pratiwi, Putu Yudia; Kertiyasa, Made Medhi Premana; Indradewi, I Gusti Ayu Agung Diatri
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.195

Abstract

As digital technology advances, online competition intensifies, yet many SMEs lack reliable, user-friendly systems. SME development often skews toward back-end optimization, while user-centered front ends remain underexplored. This study addresses that gap by designing and evaluating the front end of CV Bello Design’s digital design-asset sales platform and distilling UI/UX decisions transferable to similar SMEs. Using a Human-Centered Design (HCD), we mapped problems with the owner, staff, and past buyers, translated insights into personas and user flows, and iterated prototypes for customer and admin roles. Usability was assessed through user testing measuring effectiveness and satisfaction. In addition, a Heuristic Evaluation was conducted by experts to identify usability issues and opportunities for improvement. Test results show customer effectiveness of 93.75% and admin effectiveness of 95%. Relative efficiency reached 0,02948 goals/second for customers and 0,00939 goals/second for admins. Overall, users reported positive satisfaction. Heuristic findings highlighted needs for a login form, clearer transaction details and history, consistent currency symbols, richer product detail views, clear required-field cues, and an FAQ. Implemented fixes clarified transaction pages, standardized currency symbols, added required-field indicators, and provided an FAQ. Overall, the HCD-based interface measurably improves task completion and offers reusable design patterns for SME, web-based asset-sales platforms.
Pelican Optimization Algorithm (POA)-based Method for Solving the Optimal Capacitor Integration (OCI) Problem Yussif, Abdul-Fatawu Seini; Seini, Toufic; Wilson, Benjamin Egyin
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.233

Abstract

This study presents a pelican optimization algorithm (POA) based technique for optimizing the integration of capacitor banks in radial power distribution systems. The proposed approach adopts a hybrid approach that combines the loss sensitivity factors (LSF) and the POA to determine the appropriate placement and sizing of the capacitor banks, respectively, for best system performance. The proposed methodology is tested on the IEEE 33-bus distribution system using MATLAB software. The performance for integrating two capacitor banks is compared to that of the particle swarm optimization (PSO) and the genetic algorithm (GA) methods. The proposed POA method achieved a significant improvement in system performance. Specifically, it reduced active power losses (PLoss) by 68.08%, which surpasses the reductions achieved by PSO (61.79%) and GA (57.73%). In the case of reactive power loss (QLoss), the POA-based approach also proved superior with a 39.035% reduction, while PSO and GA-based methods achieved 28.50% and 22.59% reductions, respectively. These results underscore the effectiveness of the POA-based approach in capacitor bank placement and sizing, making it a promising candidate for enhancing voltage profiles and minimizing power losses in radial distribution systems.
Coffee Supply Chain in West Sumatra: A Systematic Literature Review Saputra, Hendra; Yunita, Imelda; Rozalia, Rozalia; Salim, Emil
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.242

Abstract

This systematic literature review explores the coffee supply chain in West Sumatra, a region renowned for its strong agricultural heritage and substantial coffee production. The study aims to synthesize previous research and identify key factors influencing the supply chain stages—production, processing, marketing, and distribution. Using a structured methodology based on systematic review protocols, this research integrates findings from various academic sources to provide a comprehensive understanding of the topic. The reviewed literature reveals both challenges and opportunities within the West Sumatran coffee supply chain. Major challenges include post-harvest quality management, limited market access, and low adoption of sustainable practices, all of which affect competitiveness. The findings highlight the importance of effective governance and stakeholder collaboration in improving operational efficiency and market adaptability. Additionally, technological innovation and digital marketing are recognized as crucial in transforming the supply chain, supporting smallholder farmers, and expanding market reach. Overall, this review underscores the complexity and significance of West Sumatra’s coffee supply chain, emphasizing the need for integrated, sustainable, and innovative strategies to strengthen resilience and global competitiveness.
Process using Laser Method on 3-Phase Induction Motor and Spray Washing Pump to Overcome Misalignment Dodi, Nofri; Abadi, Akbar; Septiani, Yudia Meka; Widia, Riza; Ardhi, Ardiansyah
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.256

Abstract

The alignment process using the laser method is one of the alignment techniques that can be applied to address misalignment. The laser method operates by utilizing an infrared laser sensor to perform the alignment between the driving object, in this case the induction motor, and the driven object, namely the spray washing pump. The alignment process aims to align the shaft of the driving object (the induction motor) with the shaft of the driven object (the spray washing pump), ensuring that both shafts are properly aligned. Misalignment refers to a condition in which there is a lack of alignment between the driving shaft and the driven shaft.
Solar-Assisted IoT-Based Smart Home for Energy Efficiency and Hazard Prevention Toward Sustainable Living Fitriyan, Rahmawati; Syafii, Syafii
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.262

Abstract

This study presents the development of a solar-assisted smart home system based on the Internet of Things (IoT) that focuses on energy efficiency and hazard prevention as a contribution to sustainable living. The proposed system integrates renewable energy utilization with intelligent monitoring to reduce energy consumption and minimize carbon footprint. A Raspberry Pi microcontroller is employed as the central platform to coordinate multiple sensors, including a DHT11 sensor for temperature and humidity measurement, a gas sensor for leak detection, a vibration sensor for earthquake monitoring, and a PZEM-004T module for real-time energy consumption tracking. The system enables remote supervision and automated responses to environmental hazards while maintaining comfort and security for occupants. Experimental results demonstrate that the prototype enhances early warning capability for potential fire incidents and natural disasters, while significantly improving energy awareness through continuous monitoring. The integration of solar energy further supports the sustainability aspect, making the system a viable smart solution for greener and safer residential environments.
The Slippage of Bolts on Axial Compression Capacity of Equal Angle Section’s Bolt Connection Usman, Fathoni; Devi, Debby Sinta
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.267

Abstract

Steel angles play a vital role in energy infrastructure, especially in latticed transmission towers where they act as axial compression members. Their structural performance is strongly influenced by end restraints, bolt configurations, and slenderness ratios, which affect buckling behavior and compression strength. This study examines how the number and arrangement of bolts, along with slenderness variations, impact the displacement and stress response of steel angles under compression using nonlinear analysis and finite element modeling. The investigation highlights that different bolt patterns and slenderness ratios significantly alter the stability and load-bearing capacity of the members. Single-row bolt configurations tend to experience greater slippage compared to multi-row setups, indicating the importance of connection design in preventing premature failures. Overall, the findings emphasize the need for optimized bolt arrangements and slenderness control to enhance resistance to buckling and improve the overall efficiency and reliability of energy infrastructure systems under axial compression loads.
Improving Spectrum Efficicency of 5G Network Otunniyi, Temidayo Oluwafunke; Ovono, Bertille Auyane Ngouessy Ep
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.271

Abstract

High peak-to-average power ratio (PAPR) is a major limitation of orthogonal frequency division multiplexing (OFDM), making it less suitable for achieving high spectrum efficiency in 5G networks. The impact of PAPR on spectrum efficiency and bit error rate (BER) is particularly critical. To address this challenge and enhance 5G performance, a spectrum-efficient cosine-modulated filter bank with tone companding method (CM-FBMC TCM) was developed and evaluated. Simulations were carried out in the MATLAB 2021 environment, with the CM-FBMC TCM model tested across three iterations. The baseline CM-FBMC exhibited a PAPR value of 16.9 dB, while the proposed CM-FBMC TCM achieved significant reductions: 7.3 dB in iteration 1, 3.8 dB in iteration 2, and 2.9 dB in iteration 3. In terms of error performance, CM-FBMC TCM reduced BER by approximately 50% compared to the conventional CM-FBMC. However, BER performance in iteration 3 deteriorated relative to iterations 1 and 2. Overall, the results indicate that CM-FBMC TCM IT3 achieved the lowest PAPR, approaching the ideal 3 dB range for multi-carrier signals in 5G systems. Nonetheless, this improvement in PAPR came at the cost of increased BER compared with earlier iterations, highlighting a trade-off between PAPR reduction and BER performance.

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