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Syafii
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LPPM Universitas Andalas Gd. Rektorat Lt. 2, Kampus Limau Manis, Padang 25163, West Sumatra, Indonesia
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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 197 Documents
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Internet Of Thing Based COVID Testing Booth Mohapatra, Badri Narayan; Bhoje, Manisha; Patil, Labhesh; Dudhamal, Nitesh
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.73

Abstract

In view of current situation the COVID-19 has become ubiquitous in every corner of the world. Every individual need to be cautious to overcome the spread of the COVID-19. It has become necessary to predict the COVID symptoms in order to allow the people at the public places and the entrances. The early symptoms of COVID-19 is high body temperature and change in pulses. It would be difficult to check temperature and take pulses of everyone, there might be a chance of being in contact with the person which is harmful. An automatic temperature scanning gate is presented to verify the body temperature and check pulses of any intruder. The main objective of the system is to monitor the human body temperature and take pulses when needed. In normal situation the gate is closed. If the module senses any high temperature (more than 37 degree Celsius) or the pulses are irregular, buzzer is activated indicating the detection of COVID symptom. Otherwise, the gate is opened, thus allowing the person into the room. The LCD displays the persons temperature and heart rate, being detected by sensor. In this project an attempt will be made to develop a prototype for covid testing booth for COVID 19 safety.
Design of Lightning Protection for Multi-Storey Buildings at the Malikussaleh University Rectorate Building Putri, Raihan; Isra, Raihan; Salahuddin, Salahuddin; Muhammad, Muhammad; Askarov, Rafael; Abdullah, Ahmad Zaidi bin
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.173

Abstract

The Malikussaleh University Rectorate Building is a multi-storey building that is facilitated for academic and bureaucratic activities. It is necessary to safeguard against natural conditions such as lightning which may occur in the building area, including the contents of the building in the form of many electronic equipment connected to electricity such as computers, television, radio, CCTV, telephone and various other electronic equipment. Based on data received from the Meteorology, Climatology and Geophysics Agency (BMKG), 393 lightning strikes occurred in North Aceh, especially the Reuleut area, from February to May 2023. Building protection can be determined based on calculations calculated using several subclassifications of the General Installation Regulations Lightning Distribution (PUIPP). based on the level of need according to the PUIPP standard with a value of R=16, NFPA with a value of R=22, and IEC 1024-1-1 value of E= 95% with level II protection. The design of the lightning rod follows the PUIPP Standard by using a type, namely an air termination system with the brand "Kurn R-85" which has a protection radius of 85 m2. To apply an electrostatic lightning rod, simply install one lightning rod on top of the building at a height of 25 m from the ground, then connect it to ground using a 50 mm2 BC cable
Comparative Analysis of Graphene and Conventional Coatings for Enhancing Aluminum Busbars’ Electrical Conductivity and Corrosion Resistance Çevik, Mehmet; Elvan, Onur
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.204

Abstract

This study explores the use of graphene coatings to enhance the electrical conductivity and corrosion resistance of aluminum busbars. Graphene was synthesized via Chemical Vapor Deposition and transferred onto aluminum, with comparisons made against bare and tin-coated samples. A single graphene layer significantly increased surface conductivity, achieving 11 times better performance than tin-coated and 33 times better than uncoated aluminum before corrosion. Characterization using Raman spectroscopy, resistivity measurements, and wettability tests confirmed successful graphene synthesis and transfer. Long-term performance was tested in NaCl solution, where graphene-coated samples exhibited only a 10.71% resistance increase, compared to 21.80% for tin-coated and 197.90% for uncoated aluminum. Initially, graphene improved water repellency, but after corrosion, the samples became hydrophilic. Despite its limitations in maintaining durability under harsh conditions, graphene proves highly effective in improving aluminum’s electrical and anti-corrosive properties, with potential for further optimization.
Comprehensive Review of Advanced Multi-Pulse Rectifier Technology and Its Application in Electric Vehicle Fast Charging Systems Harahap, Partaonan; Hamid, Muhammad Imran; Hazmi, Ariadi
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.206

Abstract

Fast charging technology for electric vehicles (EVs) is one of the key components in supporting the transition to a sustainable transportation system. This article discusses advanced multi-pulse rectifier technology, such as 12-pulse, 24-pulse, and 48-pulse configurations, which are used to improve power efficiency and reduce harmonic distortion. The analysis includes the working principles, benefits compared to conventional rectifier technology, and the challenges of its implementation. The review results show that multi-pulse rectifiers significantly reduce Total Harmonic Distortion (THD), improve power quality, and facilitate integration with renewable energy sources. This article also suggests future research directions to address the limitations of current technology and to encourage further innovations in efficient and environmentally friendly EV charging.
Development of an Energy-Efficient Electrical Load Model for Optimizing Electricity Consumption in the Headquarters Building using the PDCA Approach Budiman, Refki; Faizal, Jhonny
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.207

Abstract

The increasing electricity consumption in the public building sector has a significant impact on greenhouse gas (CO2) emissions, which is proportional to the volume of energy used. This study aims to develop an energy-efficient electrical load model to optimize electricity consumption in the headquarters building of PT Semen Padang using the Plan-Do-Check-Action (PDCA) approach. In the Plan stage, problem identification was conducted through a Pareto diagram and root cause analysis using a fishbone diagram. The dominant issue identified was energy waste in the lighting system. The solution implemented included the installation of motion sensor-based switch control devices to regulate lighting use automatically. In the Do phase, the devices were installed and tested, while in the Check phase, the evaluation showed a reduction in electricity consumption from over 85,000 kWh per month to below 80,000 kWh per month, resulting in an electricity cost savings of IDR 31 million per month. The Action phase established standards for inputs, processes, and outputs to ensure the sustainability of the improvements made. This study not only provides financial benefits but also supports the company's Energy Management System policy. With the PDCA approach, improvement processes can be carried out systematically and continuously, making a tangible contribution to energy efficiency in the public building sector.
Identification of Technical Characteristics of Ergonomic Baby Dining Chair Products Fithri, Prima; Syafruddin Indrapriyatna, Ahmad; Syaddad Hamdan , Farrell; Handayani Gusmira , Yuni
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.212

Abstract

This research aims to design an ergonomic toddler dining chair that meets the needs of safety, comfort, and usability for families, restaurants, and daycare centers in Padang City. The study identifies deficiencies in existing products and proposes solutions that suit user preferences and ergonomic standards. This research utilizes a mixed-method approach, starting with the Kano model to classify user needs into categories such as "must-have," "performance," and "attractive" features. These needs are then translated into technical specifications using the Quality Function Deployment (QFD) methodology. Data were gathered through questionnaires distributed to families with toddlers and toddler chair providers. The analysis involved validity and reliability tests using SPSS, ensuring the responses were consistent and accurate. The House of Quality (HoQ) matrix was employed in two phases to map customer needs to technical and design characteristics. Anthropometric data were incorporated to ensure that the design meets ergonomic requirements. This research contributes to the theory of ergonomic product development by demonstrating the integrated use of the Canoe and QFD models to prioritize and address user needs effectively. This research offers a solid foundation for developing an ergonomic toddler feeding chair that improves safety and comfort for toddlers, reduces the risk of musculoskeletal disorders, and improves usability for parents and service providers. The findings also emphasize the importance of anthropometric data in creating products tailored to specific user groups. The research made a new contribution to toddler furniture design by developing a dining chair that integrates important ergonomic features, including adjustable height, folding mechanism for portability, secure and comfortable backrest, and durable and easy-to-clean materials. This design addresses the concerns of users identified through comprehensive data analysis, offering a safer and more convenient product compared to the options on the market. In addition, this research framework can be a reference for future studies in developing ergonomic products.
Deep Learning-Based Sentiment Analysis Using Gated Recurrent Unit Adelakun, Najeem Olawale; Lasisi, Mariam Adenike
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.217

Abstract

In today’s volatile financial markets, investor sentiment plays a crucial role in shaping market dynamics and influencing investment decisions. Traditional analytical methods often fail to capture the subtle emotional cues embedded in vast amounts of unstructured textual data derived from news articles, social media, and financial reports. This study addresses this challenge by employing a deep learning-based approach using Gated Recurrent Units (GRU) for sentiment analysis, thereby enhancing the accuracy of financial market predictions. The research employs a systematic methodology that begins with data collection from various financial sources. This is followed by rigorous preprocessing, including data cleaning, tokenization, and downsampling to balance sentiment classes. Sentiment labeling and feature engineering, utilizing word embeddings, convert textual data into a format suitable for deep learning. The Gated Recurrent Unit (GRU) model is then trained on these features, and its performance is evaluated using metrics such as accuracy, precision, recall, and F1-score. Results indicate that while the Gated Recurrent Unit (GRU) model effectively captures neutral sentiments, it struggles to accurately classify negative and positive sentiments, highlighting areas for improvement. These findings underscore the potential of GRU-based models in financial sentiment analysis while emphasizing the need for refined techniques to enhance classification accuracy. Future research should investigate hybrid architectures, integrate attention mechanisms, and leverage real-time data to enhance the robustness and comprehensiveness of market forecasting. These insights strongly advocate for ongoing advancements in deep learning strategies to refine sentiment classification and financial prediction models.
Design and Development of an Electric Gokart Prototype ‘E-Andalasian’ for Sustainable Campus Transportation Saputra, Dendi Adi; Dahlan, Hendery; Satria, Eka; Susanti, Lusi; Khairul, Fajri; Nabil, M. Naufalunn; Gusnanda, Raihan; Joice Natalie, Ezra; Fadhillah, M. Ahlan
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.205

Abstract

This research focuses on the design, development, and optimization of the electric go-kart "E-Andalasian" as an environmentally friendly campus transportation solution. Structural analysis was performed using Finite Element Analysis (FEA) to evaluate stress distribution and deformation under static and dynamic loads. The study also optimizes the BLDC motor, 72V 40Ah lithium battery, and controller to achieve efficient and reliable performance. Results indicate critical stress points at wheel joints, with recommendations for aluminum alloy use to enhance weight efficiency. Experimental testing showed that the motor achieved a maximum torque of 44.52 N.m and 6447 RPM, while the battery supports a range of 40 km with a charging time of 2 hours 9 minutes. Although the maximum speed reached 59 km/h, additional optimization is required to meet the original design target. The findings provide a prototype foundation for future improvements and contribute to green campus mobility.
Effectiveness of Carbon Fibre Reinforced Polymer (CFRP) & Textile Reinforced Mortar (TRM) Strengthening on Circularised Non-Slender Reinforced Concrete Columns Ochieng, Victor; Abuodha, Silvester; Mumenya, Siphila
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.218

Abstract

This research paper presents an experimental investigation into the effectiveness of Carbon fibre Reinforced Polymer (CFRP) and Textile Reinforced Mortar (TRM) for strengthening circularized non-slender reinforced concrete columns. The experiment examined the following parameters cross-section shape namely; - square, circular, and circularized, the strengthening material i.e. CFRP or TRM, and the number of wrapping layers of the strengthening material (one and two layers).  45 specimens were prepared, given various treatments, strengthened, and loaded uniaxially until failure.  The specimens were categorised into three series based on their cross-section geometry; - circular, square, and circularized. The results showed that the circular specimens recorded the highest axial capacity followed by the circularized specimens while the square specimens recorded the least axial capacity, CFRP confinement was more effective compared to TRM confinement in enhancing the axial capacity and ductility, and doubling the number of both CFRP and TRM layers from 1 to 2 resulted in a significant increase in both the axial capacity and ductility of the specimens. Consequently, the gain in axial capacity and the ductility of the strengthened specimens was sensitive to the number of wraps and the strengthening material. It was also noted that the failure modes of the specimens differed depending on the cross-section geometry. From the findings of this study, it is believed that circularisation and confinement using TRM & CFRP is a promising solution for retrofitting inadequate square columns.
Challenges of Drinking Water Supply in Indonesian Cities: A Brief Review Ihsan, Taufiq; Ilfan, Freddy
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 2 (2025): July 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i02.160

Abstract

The supply of safe drinking water in the developing world, particularly in Indonesia, has remained one of the major challenges. Millions are still without access to clean water, which inflicts public health and has negative implications for socioeconomic development. This paper elaborates on the multifaceted challenges facing the drinking water supply in Indonesian cities, from inconsistent policies and lack of autonomy for Water Agencies to aging infrastructure, unreliable power supply, and inadequate investment. Brief case studies from Jakarta, Surabaya, and Padang plainly bring out the specificity of issues in various cities. The paper suggests that solutions can lie in policy reform, empowering the water agencies, fighting corruption, greater investment in infrastructure, making the most of pricing and cost recovery, and strategic engagement with the private sector. Unless these are addressed, such challenges will persist in hindering the progress of Indonesia toward the universal access goal for all urban residents to sufficient, safe, reliable, and affordable drinking water

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