ABSTRACT Corn sheller machine functions to separate corn kernels from the cobs. Corn sheller is a tool designed to improve and speed up the shelling results. With this mechanical corn sheller machine design, corn shelling work is more effective and efficient compared to manual shelling such as traditional shelling by hand, shelling with the tpi model, and the large method. The design results c…
ABSTRAK Onion (Allium cepa L.) is an important horticultural commodity that is widely used as a basic seasoning in various dishes. The high demand for onions requires increased efficiency in the peeling and slicing process. Onion peeling and slicing machines on the market today generally use a vertical system, but have limitations such as imperfect peeling results, risk of leakage during the p…
ABSTRACT The design and manufacture of an off-grid solar panel monitoring system integrated with temperature and light intensity sensors based on the Internet of Things (IoT) is discussed in this study. The background of this study stems from the need for an automatic monitoring system to determine the performance of solar power plants (PLTS) in real time without having to make manual records.…
Abstract Waste is the residue of human activities or natural processes that is no longer used, discarded, and has no economic value for its owner. The problem of waste in waterways, especially rivers, is a crucial environmental issue. The accumulation of trash in rivers not only pollutes the environment and damages aquatic ecosystems, but can also cause flooding. This thesis designs an IoT-bas…
ABSTRAC This study aims to design and implement an analog-based Battery Management System (BMS) utilizing a TL431 comparator and a BD140 transistor to provide overcharge protection for a 3S lithium-ion battery configuration. The proposed system is integrated with a 10-Watt photovoltaic (PV) solar panel as the energy source and is equipped with a monitoring subsystem consisting of an INA219 cur…
ABSTRAK The development of information and communication technology has driven an increasing need for fast and stable internet access, especially through public WiFi networks that are now widely available in cafes, restaurants, and other public spaces. This study aims to measure and analyze the quality of service (QoS) and the quality of user experience (QoE) on open access WiFi networks i…
ABSTRAK This study aims to analyze and compare the performance of 4G LTE networks provided by two cellular operators, Telkomsel and 3 (Tri), in Pekanbaru City. Measurements were conducted in three different environments, namely urban, sub-urban, and indoor areas, using drive test methods. The evaluated performance parameters include Reference Signal Received Power (RSRP), Reference Signal…
ABSTRAK The rapid development of cellular technology demands the availability of communication networks with high capacity, low latency, and more reliable coverage. 5G technology is here as an answer to these needs, offering speeds of up to gigabits per second, latency below 1 ms, and bandwidth much greater than 4G. Pekanbaru City, as an economic center and a developing area towards a sma…
ABSTRACT Monitoring small-signal stability in power systems has become increasingly important as network interconnections grow more complex. Electromechanical oscillations triggered by small disturbances must be accurately identified to prevent performance degradation and potential system instability. This study applies the Eigen System Realization Algorithm (ERA) to estimate modal parameters,…
ABSTRACT Indonesia is one of the countries with a relatively high level of meat consumption, as protein and nutrients are essential for society. However, problems such as the insufficient supply of beef compared to market demand and the increasing number of cases involving the adulteration of beef with pork have become major concerns. This issue not only causes economic losses for consumers bu…
ABSTRACT Formic acid is used as a preservative and antibacterial agent in animal feed, as a coagulant in the rubber industry, as a raw material for leather tanning and textile processes, and as a reducing agent in various chemical reactions. The demand for formic acid in Indonesia in 2023 is 3,444,836 tons and is projected to increase by 14,323 tons by 2032. The plant design aims to produce fo…
ABSTRACT Hexene-1 is a linear, unbranched isomer of hexene with the chemical formula C6H12. Hexene-1 is a clear colorless liquid with a petroleum-like odor, soluble in most organic solvents but insoluble in water. Hexene-1 also provides tear resistance and other desirable properties to polyethylene, thus its main use as a comonomer in the production of High Density PolyEthylene (HDPE) and Line…
ABSTRACT Paraxylene (C₈H₁₀) is an aromatic hydrocarbon compound widely used as the primary raw material in the production of purified terephthalic acid (PTA) and dimethyl terephthalate (DMT) for the manufacture of polyester and polyethylene terephthalate (PET). Paraxylene derivatives are extensively applied in the textile fiber, film, resin, packaging plastic, and chemical additive in…
ABSTRACT The increasing demand for basic chemicals has prompted Indonesia to produce its own chemicals, which until now have been imported. One example is acrolein, which according to data from the Central Statistics Agency (2023), Indonesia still imports around 2,098,592 kg/year. Acrolein is the simplest unsaturated aldehyde (C₃H₄O) that plays an important role as a raw material for vario…
ABSTRACT Betaine surfactant is an amphoteric surfactant containing both positive and negative ions in its hydrophilic portion. Betaine surfactant is an industrial product. It is used as a foam enhancer and as an ingredient in various skincare products, such as shampoo, shower gel, and cosmetics, and is safe for sensitive skin. Surfactant production in Indonesia reaches 70,000 tons per year, wh…
ABSTRACT Nitric acid (HNO₃) is a crucial industrial chemical widely used in various sectors, particularly as a raw material for producing ammonium nitrate fertilizers, explosives, and in the metal industry. The increasing demand for nitric acid in Indonesia each year is not aligned with the still limited domestic production capacity, causing Indonesia to rely on imports to meet national need…
ABSTRACT Acetic acid is an essential chemical widely used across various industries. It is utilized in the production of polymers such as polyethylene terephthalate (PET), cellulose acetate, and polyvinyl acetate, as well as in various types of fibers and textiles. In addition, acetic acid serves as an acidity regulator in the food industry, a raw material in chemical industries such as Purifi…
ABSTRACT Hydrogen peroxide is widely used as an oxidant, bleaching agent, disinfectant, polymer initiator, and cross-linker in various fields, such as papermaking, textiles, chemical synthesis, military, electronics, food, pharmaceuticals, cosmetics, environmental protection, and metallurgy. Hydrogen peroxide production in Indonesia reaches 110,000 tons per year, which is insufficient to meet …
ABSTRACT Phthalic anhydride (C8H4O3) is a chemical used in the manufacture of plastics and polymers. One of its main applications is as a raw material for the production of plasticizers, unsaturated polyester resins, alkyd resins, and other derivative products. Indonesia's phthalic anhydride needs are met by PT Petrowidada in Gresik, Indonesia, with a production capacity of 70,000 tons/yea…
Anandathov Kiswara ABSTRACT Caprolactam is an organic compound with the chemical formula (C6H11NO). At room temperature, caprolactam is a white crystalline solid with a distinctive odor. Caprolactam is categorized as an industrial product because it is used in the textile industry as a raw material for the manufacture of nylon-6, which is the starting material for the manufacture of synthetic…