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All Journal RESWARA: Jurnal Riset Ilmu Teknik
Pratama, Ahmad Fauzan
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Analysis of Production System Automation Effects on Energy Efficiency in Manufacturing Industry Pratama, Ahmad Fauzan; Rachman, Gede Arya; Wilson, Paul R.
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 1 (2026): RESWARA: Jurnal Riset Ilmu Teknik, January 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i1.367

Abstract

The Brantas River Basin plays a strategic role in supporting domestic, agricultural, industrial, and ecological functions in East Java, Indonesia. Rapid urbanization, land-use change, and increasing anthropogenic activities have exerted significant pressure on river water quality, necessitating comprehensive and reliable assessment methods. This study aims to evaluate the water quality status of the Brantas River using the Pollution Index (PI) approach, which has been widely adopted for river quality assessment in Indonesia and other countries. Secondary water quality data were analyzed, encompassing key physical and chemical parameters, including biochemical oxygen demand, chemical oxygen demand, dissolved oxygen, total suspended solids, nutrients, and selected heavy metals. The PI values were calculated based on Indonesian water quality standards and interpreted according to established classification criteria. The results indicate that most monitoring points along the Brantas River fall into the moderately to heavily polluted categories, reflecting cumulative pollution loads from domestic wastewater, industrial discharges, and agricultural runoff. Comparative analysis with previous studies confirms the consistency of PI-based assessments and highlights spatial variability influenced by land use and human activities. This study demonstrates that the Pollution Index method is an effective and practical tool for evaluating river water quality and provides a scientific basis for pollution control strategies and sustainable river basin management in the Brantas River Basin.
Evaluation of Reinforced Concrete Structural Performance under Earthquake Loads Based on Nonlinear Analysis in Lombok Pratama, Ahmad Fauzan; Zameeruddin, Mohd.
RESWARA: Jurnal Riset Ilmu Teknik Vol. 2 No. 3 (2024): RESWARA: Jurnal Riset Ilmu Teknik, July 2024
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v2i3.375

Abstract

Lombok is located in a highly seismic region of Indonesia, where reinforced concrete (RC) buildings dominate the urban built environment. However, the seismic performance of existing RC structures varies significantly depending on design practice, material quality, and structural configuration. This study evaluates the seismic performance of reinforced concrete buildings in Lombok using nonlinear structural analysis, with emphasis on nonlinear static pushover and nonlinear dynamic time history methods. The study adopts a comparative analytical approach by synthesizing findings from recent experimental, numerical, and field-based studies related to RC seismic performance in Indonesia and other seismic regions. Key performance indicators such as interstory drift, plastic hinge formation, displacement capacity, and performance levels (Immediate Occupancy, Life Safety, and Collapse Prevention) are examined. The analysis highlights that many existing RC structures in Lombok are vulnerable to moderate-to-strong earthquakes due to low material strength, inadequate detailing, and non-compliance with modern seismic codes. However, structures designed with proper ductility provisions and evaluated using performance-based methods show satisfactory behavior under seismic loads. The study concludes that nonlinear analysis is essential for realistic seismic performance evaluation and recommends systematic assessment and retrofitting of existing buildings in Lombok to enhance structural resilience and reduce seismic risk.
Co-Authors Rachman, Gede Arya Wilson, Paul R. Zameeruddin, Mohd.