ABSTRACT Infill walls in reinforced concrete (RC) frame structures are generally classified as non-structural elements and therefore are often disregarded in structural design. However, their presence significantly contributes to the overall strength and stiffness of the structure. This study aims to compare the seismic performance of RC frame structures with and without infill walls in ac…
ABSTRACT Masonry walls in buildings are generally classified as non-structural elements and are therefore not accounted for in the structural design. In buildings with soft-story characteristics, neglecting the effect of masonry infill walls needs to be studied further, since soft-story behavior can increase the vulnerability of the structure during an earthquake. A soft story occurs when …
ABSTRACT Overall Equipment Effectiveness (OEE) is a key indicator for evaluating machine effectiveness in the manufacturing industry, including the sheeter (paper-cutting) machine at PT. Riau Pulp and Paper (PT. RAPP). The sheeter machine functions to cut large paper rolls into sheets according to production requirements, with a focus on precision and efficiency. OEE consists of three main com…
ABSTRACT Javanese culture has a complex family genealogy system, covering up to 18 levels of ancestors and descendants, as well as various horizontal terms such as siblings, uncles, and cousins. This complexity often makes it difficult for younger generations to understand their kinship relationships. This study implements a Depth First Search (DFS) algorithm combined with a Rules Engine to au…
ABSTRACT The livestock sales process at Sumber Makmur Farm was previously carried out manually, which caused difficulties in promotion, transactions, and data management. This research aims to design and develop a web-based livestock sales application using the prototype method to simplify the sales process and improve data management efficiency. The application provides detailed livestock inf…
ABSTRACT Generator sets (gensets) are one of the main sources for generating electrical energy, especially in areas not yet covered by the main electricity grid. Optimal generator set performance depends heavily on the stability and balance of its components. This research aims to design and manufacture generator set supporting components that can improve operational stability, energy efficien…
ABSTRACT Three-phase induction motors are widely used in industrial applications due to their reliability, operational efficiency, and simple construction. However, these motors are vulnerable to various faults, especially in the stator winding, which can potentially cause severe damage if not supported by an effective protection system. This study analyzes the power supply protection system …
ABSTRACT The reliability of a power generation system is largely determined by the system's ability to cope with unexpected disturbances. In this context, contingency analysis is crucial for evaluating the impact of disturbances on overall system performance. This study aims to conduct a contingency analysis on the Tenayan coal-fired power plant, focusing on three main components: the boiler, …
ABSTRACT The rapid development of industry has contributed greatly to economic growth, but has also had a negative impact on the environment, especially in the form of water pollution due to industrial wastewater. One of the common pollutants is methylene blue dye, which is widely used in the textile industry. This substance is toxic, difficult to degrade, and can cause disruption to aquatic e…
ABSTRACT This study analyzes meteorological drought on peatlands in Bengkalis Island using the Standardized Precipitation Index (SPI). Rainfall data from the Global Precipitation Measurement (GPM) satellite for the 2015–2024 period were processed through two approaches: manual calculation based on the Gamma distribution using Microsoft Excel and automated computation with Google Earth E…
ABSTRACT The roasting machine is an important tool in the process of cooking spices, functioning as a frying tool without oil to reduce water content and enhance flavor. Quality Function Deployment (QFD) is a systematic method used to identify and meet customer needs by integrating the voice of the customer into the product design and development process. The application of QFD in the developm…
ABSTRACT This research aims to analyze the corrosion rate and the efficiency of bay leaf (Eugenia Polyantha L) extract as an inhibitor at concentrations of 0%, 3%, 6%, and 9% on ST-37 steel in a peat water medium. The bay leaf extract was prepared using a maceration method, and the solvent was separated using a rotary evaporator. ST-37 steel specimens, measuring 10 mm × 10 mm × 3 mm, were im…
ABSTRACT The automotive industry sector currently requires materials that have strong and lightweight properties such as composite materials. Composites are the result of combining two or more materials macroscopically which aims to produce materials with superior properties. Therefore, the use of oil palm frond fiber as a composite reinforcement is an environmentally friendly alternative to r…
ABSTRACT Riau Province is one of Indonesia’s main producers of pineapple and coconut, with annual production reaching hundreds of thousands of tons. Processing these commodities generates large amounts of waste in the form of pineapple peel and coconut pulp, which, if not managed properly, can potentially cause environmental pollution. One promising solution is bioconversion using Black …
ABSTRACT The Tangkerang River flows through source areas such as markets, settlements, hospitals, and hotels, which contribute wastewater that poses risks if discharged directly into the water body without prior treatment. This study aims to assess pollutant loads and carrying capacity using the Qual2Kw and WASP (Water Quality Analysis Simulation Program) models. The Qual2Kw model was appl…
ABSTRACT Diphenyl Carbonate (DPC) is a carbonate ester compound with the chemical formula (C6H5O)2CO which plays a role in the manufacture of Polycarbonate (PC) resin. DPC is used in the synthesis of organic compounds, polymers, solvents, and plasticizers. DPC is an important and non-toxic raw material in the PC industry. The PC production process, which generally involves hazardous and toxic …
ABSTRACT The plant is planned to be located in Pauh Ranap Village, Peranap Subdistrict, Indragiri Hulu Regency, Riau Province. Coal will serve as the raw material for DME production through a gasification process to produce syngas, which will then be synthesized into methanol. The methanol will then undergo dehydration to produce the final DME product. DME is targeted to be an additive or subs…
ABSTRACT The acrolein plant is designed with a production capacity of 30,000 tons/year. The raw materials used are propylene and oxygen, aided by the α-Bi₂Mo₃O₁₂ catalyst through the propylene oxidation reaction. The propylene oxidation reaction produces acrolein (C₃H₄O) and by-products such as acrylic acid (C₃H₄O₂), carbon dioxide (CO₂), and water (H₂O). Indonesia's ave…
ABSTRACT Diphenyl carbonate (DPC) is synthesized with the raw materials of methanol, oxygen, and carbon monoxide to synthesize dimethyl carbonate (DMC), and then DMC is reacted with phenol to synthesize DPC. The plant is planned to be built in Dumai City, Riau, Indonesia. Dumai City was chosen to facilitate access to fulfilment of raw materials such as methanol, carbon monoxide and phenol. The…
ABSTRACT Photovoltaic (PV) solar panels are an efficient renewable energy source, yet their performance is often affected by input-side voltage ripple at the boost converter, which degrades power-conversion efficiency and system stability. This study designs and evaluates ripple mitigation using a bank of 10,000-μF electrolytic capacitors that can be selectively engaged (10k/20k/30k μF) via …