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Journal of Engineering and Technological Science
Published by Lembaga Penelitian dan Pendidikan (LPP) Kalibra
ISSN : -     EISSN : 3110259X     DOI : https://doi.org/10.70716/jets
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Journal of Engineering and Technological Science (JETS) is a peer-reviewed open-access journal published by Lembaga Penelitian dan Pendidikan (LPP) Kalibra with registered number of e-ISSN 3110-259X, dedicated to publishing high-quality research and innovation in the field of engineering and technological science. JETS provides a forum for researchers, academics, professionals, practitioners and students to instill and share knowledge in the form of empirical and theoretical papers, case studies, literature reviews and book reviews related to scientific research in the field of technology and engineering, and or related to it with various themes Engineering such as mechanical engineering, electrical and electronic engineering, civil engineering, chemical engineering, industrial engineering, as well as informatics and computer engineering, robotics, industrial automation, artificial intelligence, Internet of Things (IoT). This journal will process all manuscript receipts in a double anonymous review by Bestari partners.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 15 Documents
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Analysis of Electrical Power Quality in the 20 kV Distribution Network in the Cikarang Industrial Area Ariadi, Rizky Pratama; Papadopoulou, Maria Eleni; Nakamura, Kenji
Journal of Engineering and Technological Science Vol. 2 No. 1 (2026): Journal of Engineering and Technological Science, February 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/jets.v2i1.221

Abstract

Industrial areas demand stable and high quality electrical power to support continuous production processes. The Cikarang Industrial Area is one of the largest industrial zones in Indonesia and relies heavily on a 20 kV medium voltage distribution network. However, increasing nonlinear loads, load imbalance, and network expansion have raised concerns related to power quality issues. This study aims to analyze electrical power quality in the 20 kV distribution network serving the Cikarang Industrial Area. The research applies a quantitative case study approach using field measurements, load flow analysis, and harmonic evaluation based on IEEE standards. Data were collected from selected feeders supplying industrial customers and analyzed using ETAP software. The results show that voltage drop values range from 1.8 percent to 5.2 percent during peak load conditions, while total harmonic distortion of current exceeds recommended limits in several feeders. Load imbalance also contributes significantly to increased power losses. These findings are consistent with previous studies on Indonesian medium voltage networks. The study concludes that power quality in the Cikarang Industrial Area requires systematic monitoring and corrective measures, including load balancing, reactive power compensation, and harmonic mitigation. The results provide practical insights for utilities and industrial consumers to improve network reliability and efficiency.
Effect of AC-WC Asphalt Mixture Variations on Marshall Stability in Palangka Raya City Purnomo, Raja Raid Nabil Putra; Fatmawati, Leily; Thompson, Michael J.
Journal of Engineering and Technological Science Vol. 2 No. 1 (2026): Journal of Engineering and Technological Science, February 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/jets.v2i1.222

Abstract

Asphalt Concrete–Wearing Course (AC-WC) is a critical pavement layer directly exposed to traffic loads and environmental conditions. In tropical cities such as Palangka Raya, variations in asphalt mixture composition significantly influence pavement durability, particularly Marshall stability. This study aims to comprehensively evaluate the effect of AC-WC asphalt mixture variations on Marshall stability in Palangka Raya City through a systematic synthesis of experimental studies published between 2012 and 2025. The research method employed a qualitative–quantitative comparative analysis of 30 peer-reviewed journal articles, theses, and dissertations focusing on AC-WC mixtures incorporating modifiers such as Asbuton, polymer additives, fillers, temperature variations, and immersion conditions. The results indicate that asphalt modifiers—especially polyethylene-based polymers, Asbuton granular asphalt, and alternative fillers—consistently enhance Marshall stability, with optimal stability generally achieved within 2–5% additive content. Environmental factors, including water immersion and temperature variations, were found to significantly reduce stability if not properly controlled. Overall, most AC-WC mixtures evaluated met the Indonesian Bina Marga 2018 specifications, demonstrating their suitability for heavy traffic conditions. This study contributes to pavement engineering by providing a consolidated technical reference for optimizing AC-WC mixture design in tropical urban environments.
Evaluation of Urban Drainage Capacity in Relation to Surface Flooding in Lowokwaru District, Malang City Asmaranto, Runi; Harisuseno, Donny; Palla, Anna
Journal of Engineering and Technological Science Vol. 2 No. 1 (2026): Journal of Engineering and Technological Science, February 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/jets.v2i1.223

Abstract

Urban surface flooding has become a recurrent problem in rapidly urbanizing cities in Indonesia, including Malang City. The Lowokwaru District, as an educational and residential hub, frequently experiences inundation during moderate to high rainfall events, indicating potential inadequacy in its urban drainage system. This study aims to evaluate urban drainage capacity in relation to surface flooding in Lowokwaru District through a comprehensive synthesis of empirical studies, modeling-based evaluations, and spatial analyses conducted over the past decade. A qualitative-descriptive and comparative approach was employed by reviewing and integrating results from peer-reviewed journal articles that applied hydrological–hydraulic analysis, EPA SWMM modeling, GIS-based evaluation, and eco-drainage concepts. The results indicate that a significant proportion of drainage channels in Lowokwaru are unable to convey design flood discharges for 5- to 10-year return periods due to insufficient channel dimensions, sedimentation, debris accumulation, and rapid land-use change. Several studies demonstrate that structural improvements alone are insufficient; instead, integrated solutions such as Low Impact Development (LID), infiltration wells, detention ponds, and eco-drainage strategies can reduce surface runoff and flooding by 40–70%. This study concludes that urban drainage management in Lowokwaru requires a systemic and sustainable approach that integrates hydraulic capacity enhancement with land-use control and nature-based solutions. The findings provide a consolidated scientific basis for urban flood mitigation planning in Malang City and similar rapidly urbanizing areas.
Performance Analysis of Flexible Pavement on the Banda Aceh–Medan National Road Using the Pavement Condition Index Method Isya, Muhammad; Setyawan, Ary; Pillai, Salu S.
Journal of Engineering and Technological Science Vol. 2 No. 1 (2026): Journal of Engineering and Technological Science, February 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/jets.v2i1.224

Abstract

The Banda Aceh–Medan National Road serves as a strategic transportation corridor in northern Sumatra, supporting regional mobility and economic activities. Continuous traffic loading and environmental effects have caused progressive deterioration of flexible pavement performance along this route. This study aims to evaluate the functional performance of flexible pavement on the Banda Aceh–Medan National Road using the Pavement Condition Index (PCI) method. A quantitative descriptive approach was employed through visual pavement surveys, damage identification, severity classification, and PCI calculation following ASTM D6433 standards. The road section was divided into several sample units to ensure representative condition assessment. The results indicate that the average PCI value of the observed segments falls within the “fair” to “poor” condition categories, with dominant distress types including alligator cracking, rutting, and raveling. Comparative analysis with previous studies confirms the reliability of the PCI method in reflecting actual pavement conditions and supporting maintenance decision-making. The findings emphasize the necessity for timely preventive and corrective maintenance strategies to extend pavement service life. This study contributes empirical evidence for pavement management systems on national roads in Indonesia and reinforces the applicability of PCI as a standardized evaluation tool.
Slope Stability Study in the Hilly Area of Gunung Kidul Using the Limit Equilibrium Method Pratama, Muhammad Aditya; Chakraborty, Rubi; Morimasa, Shingo
Journal of Engineering and Technological Science Vol. 2 No. 1 (2026): Journal of Engineering and Technological Science, February 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/jets.v2i1.226

Abstract

Slope instability is a critical geotechnical issue in hilly regions of Indonesia, particularly in karst-dominated terrains such as Gunung Kidul, Yogyakarta. Frequent landslides triggered by rainfall, geological discontinuities, and slope geometry pose significant risks to infrastructure and communities. This study aims to evaluate slope stability conditions in the hilly area of Gunung Kidul using the Limit Equilibrium Method (LEM). The analysis integrates geological, geomorphological, and geotechnical parameters derived from field observations, laboratory testing, and secondary data. Several limit equilibrium approaches, including Bishop, Morgenstern–Price, and generalized limit equilibrium methods, were employed to determine the factor of safety under various slope geometries and groundwater conditions. The results indicate that slope geometry and groundwater level are the dominant factors controlling slope stability, with safety factors decreasing significantly under saturated conditions. Comparisons with previous studies demonstrate that LEM provides reliable and consistent results for both two-dimensional and three-dimensional slope analyses in complex hilly terrains. This research contributes to improved slope stability assessment in karst regions and provides a scientific basis for landslide mitigation planning in Gunung Kidul and similar geological settings.

Page 2 of 2 | Total Record : 15

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