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International Journal Science and Technology (IJST)
Published by Asosiasi Dosen Muda Indonesia
ISSN : 28287223     EISSN : 28287045     DOI : https://doi.org/10.56127/ijst.v1i2
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
International Journal Science and Technology (IJST) is a scientific journal that presents original articles about research knowledge and information or the latest research and development applications in the field of technology. The scope of the IJST Journal covers the fields of Informatics, Mechanical Engineering, Electrical Engineering, Information Systems and Industrial Engineering. This journal is a means of publication and a place to share research and development work in the field of technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 132 Documents
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Design of a National-Standard Electrical Installation for a Polyclinic: A Case Study of Cibubur Hospital Polyclinic with Load, Lighting, and Backup System Analysis Galing, Andi; Wahyuningsih, Erfiana
International Journal Science and Technology Vol. 5 No. 1 (2026): March: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v5i1.2614

Abstract

Electrical installation systems in healthcare facilities must ensure safety, reliability, and operational continuity because medical services depend on stable power supply and adequate lighting conditions. In polyclinic environments, electrical disturbances may affect service quality and patient safety, making proper system design essential. Objective: This study aims to design and evaluate the electrical installation of the Cibubur Hospital Polyclinic based on national standards, focusing on load distribution, lighting performance, backup power systems, and grounding effectiveness. Method: This research employs a mixed qualitative–quantitative descriptive approach. Data were collected through field observations, direct measurements using electrical instruments (clamp meter, lux meter, and earth tester), and documentation review of installation layouts and technical standards. The analysis was conducted through technical calculations and standard-based evaluation. Results: The total electrical load is divided into 11,883 W for normal PLN load and 7,406 W for priority UPS load, indicating a functional separation between general and critical services. Lighting measurements show that seven out of ten rooms meet the required standards, while three rooms remain below the threshold. The grounding system demonstrates resistance values well below the allowable limit, indicating effective protection performance. Implications: The results indicate that integrated electrical installation design can support safe and continuous healthcare operations, although improvements in lighting uniformity and system specification consistency are still required. Originality: This study offers an integrated evaluation of load distribution, lighting, backup power, and grounding within a single polyclinic case study, providing practical and academic contributions to electrical system design in healthcare facilities.
Performance Evaluation of Porous Asphalt Mixtures Incorporating Cotton Cloth Ash as Filler Based on Marshall Characteristics and Permeability Firmansyah, Dicky Dwi; Rizkiardi, Aditya; Hartatik, Nurani
International Journal Science and Technology Vol. 5 No. 1 (2026): March: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v5i1.2653

Abstract

Porous asphalt is designed to improve surface drainage and reduce water accumulation; however, its performance depends on the balance between mechanical strength and permeability. The use of alternative filler materials, particularly textile-derived waste such as cotton cloth ash, remains limited. Objective: This study aims to evaluate the performance of porous asphalt mixtures incorporating cotton cloth ash as a substitute filler, focusing on optimum asphalt content, Marshall characteristics, and permeability behavior. Methodology: An experimental quantitative approach was conducted in a laboratory. The mixture design followed the Australian Asphalt Pavement Association (AAPA, 2004) method. Data were obtained through material testing, Marshall testing, and permeability testing. Key parameters analyzed included Void in Mix (VIM), Stability, Flow, Marshall Quotient (MQ), Cantabro Loss (CL), Asphalt Flow Down (AFD), and permeability. Findings: The Optimum Asphalt Content (OAC) was identified at 4.80%. The best mechanical performance occurred at 4.5%–5% asphalt content, with maximum stability of 832 kg and MQ of 530 kg/mm. Permeability increased with asphalt content, reaching 0.20 liter/second at 6%, indicating improved drainage but reduced structural performance at higher binder levels. Implications: The results highlight the importance of optimizing asphalt content to achieve a balance between mechanical strength and hydraulic performance in porous asphalt design. Originality: This study introduces cotton cloth ash as an alternative filler, demonstrating its feasibility in maintaining functional and structural performance while supporting sustainable pavement materials.

Page 14 of 14 | Total Record : 132

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