ABSTRAC This study aims to determine the effect of the implementation of E-filing System, compliance level, and tax knowledge on taxpayer compliance with compliance costs as a moderating variable. The population in this study is individual taxpayers registered at KPP Pratama Tampan Pekanbaru. The sampling method used in this study is non-probability sampling. The data analysis technique used i…
ABSTRACT This study aims to provide empirical evidence on the effect of environmental performance, intellectual capital, and capital structure on financial performance. The population in this study was all mining and plantation companies listed on the Indonesia Stock Exchange (IDX) and participating in the PROPER program from the Ministry of Environment and Forestry (KLHK) in the 2020–2023 p…
ABSTRACT Propylene glycol is one of the organic compounds commonly used as a food preservatives, cosmetic raw materials, wetting agents for chewing gum, monomer in the synthesis of polyester, and anti-freeze liquids. The demand for propylene glycol is increasing along with the development of the industry, especially the cosmetics and textile industries. The market value of propylene glycol glo…
ABSTRACT Indonesia has exported ten shipments of acetophenone through three suppliers to several countries, including China, Japan, and Singapore. However, since domestic production is still insufficient to meet demand, Indonesia still needs to import acetophenone from several countries. This situation presents a significant opportunity to establish a plant to meet domestic demand while compet…
ABSTRAC Indonesia still imports from various countries due to domestic supply shortages. The global acetophenone market was valued at US$ 219 million in 2021 and is expected to grow rapidly from 2022 to 2032. This situation presents a significant opportunity to establish a factory to meet domestic demand and compete with international producers from China, India, and Germany. The demand for ac…
ABSTRACT Independent oil palm farming is one of the key sectors supporting the livelihoods of farmers in Tandun District, Rokan Hulu Regency. However, challenges such as low productivity, limited capital, the use of inferior seedlings, and suboptimal cultivation practices remain major obstacles to increasing farmers' income. This study aims to analyze the income of independent oil palm farmers…
This article explains how the Indonesian Government is trying to handle the Mail Order Bride cases which are currently occurring in Indonesia. The Mail Order Bride case is a mode of Transnational Crime (Human Trafficking) which in its handling requires assistance from many parties such as family and neighborhood as well as government officials who work in the field of marriage matters. The impo…
ABSTRACT The zoo is a family educational tourist attraction that is related to the realm of flora and fauna, but is more closely related to the realm of fauna or animals themselves. Kasang Kulim Zoo is an area of the Bina Wisata Foundation and the Wildlife Park is the only zoo in Riau Province. The aim of this research is to determine the factors that influence the number of tourist visits to …
ABSTRACT Polyethylene waste is one of the plastic wastes that can be utilized in the construction industry. This research aims to study the use of polyethylene waste as a substitute for sand in the mixture for making paving blocks. The quality of paving blocks is determined by compressive strength testing. This research was designed with a mixture ratio of polyethylene, namely 5%, 10%, 15%…
ABSTRACT Oxalic acid has various industrial applications, including textile dyeing, iron coating (rust prevention), electrolytes, cork bleaching, cobalt production, agrochemical raw materials, pharmaceuticals, and more. The establishment of an oxalic acid plant aims to meet domestic demand and enhance Indonesia's capability as an exporter. The production process involves glucose oxidation usin…
ABSTRACT In the electric power distribution system, not all power can be utilized optimally by consumers due to power losses caused by technical and non-technical disturbances. The methods used in this study include primary and secondary data collection, line impedance calculations, and analysis of factors that cause power losses. The results of this study are expected to provide recommend…
ABSTRACT The quality of electrical power is highly influenced by the voltage stability in distribution systems. One of the most common power quality disturbances is voltage sag, which is a short-term reduction in voltage typically caused by sudden load changes. This voltage drop can negatively affect the performance of electrical equipment, especially sensitive devices. This study aims to simu…
ABSTRAK The grounding system is an important part of the electricity distribution network that functions to protect equipment and humans from electrical disturbances due to insulation failure or overvoltage. Good grounding allows the fault current to be channeled to the ground efficiently, thereby reducing the risk of electrical accidents and equipment damage. The grounding resistance value is…
ABSTRAK An inverter is a device that functions to convert direct current (DC) voltage into alternating current (AC) voltage. This study aims to design and test a 12V DC to 220V AC inverter system using an Arduino microcontroller as a PWM signal generator. The circuit consists of several main components: Arduino, optocoupler for signal isolation, MOSFET as an electronic switch, and a transforme…
ABSTRACT Automatic Transfer Switch (ATS) is an electrical device to control electrical sources switching from the main source to the backup source or otherwise. With this device theres no need for an operator to manually control the device. The control implements Programmable Logic Controller (PLC) as a controller of an ATS circuit that will work to switch between the main source and the backu…
ABSTRACT Red chili production in Riau province has decreased in the last three years. Efforts to increase production are carried out by adding empty oil palm bunches (EOPB) and watering. This study aims to determine the interaction of EOPB compost and watering frequency, single factor of EOPB compost and watering frequency as well as to obtain the best EOPB compost dose and watering frequency …
ABSTRACT The high nutritional content and benefits of eggplant have increased the demand for eggplant, but eggplant production is still low and has not been met. Based on this, this study aims to determine the effect of interaction between NASA liquid organic fertilizer and NPK fertilizer, the single factor of administering NASA liquid organic fertilizer and NPK fertilizer, and to obtain the b…
ABSTRACT Pekanbaru City, located in Riau Province, Indonesia, comprises six sub-watersheds in its southern region: Sibam, Air Hitam, Senapelan, Sail, Tenayan, and Pendanau. Effective watershed management plays a vital role in hydrological planning, particularly in estimating peak flood discharge through the use of Synthetic Unit Hydrograph (SUH) methods. Among these, the Snyder method is widel…
Abstract Air transportation plays a crucial role in regional connectivity and economic growth. Kualanamu International Airport, as one of the main gateways in North Sumatra, experienced significant fluctuations in passenger numbers due to the COVID-19 pandemic. This study aims to evaluate and project the future demand for landing movements at Kualanamu Airport for the period 2024 to 2043. The …
ABSTRACT Methyl Ester Sulfonic Acid (MESA) is a group of anionic surfactants made through the sulfonation process. Methyl ester sulfonic acid is used to make liquid detergents. In Indonesia, there are not many factories or producers of methyl ester sulfonic acid so that imports are made to meet the needs. Therefore, the processing of methyl ester sulfonic acid is needed to meet the needs of me…