Unmanned Surface Vehicle (USV) is an unmanned vehicle that is currently being developed in Indonesian waters for the purposes of depth surveys in waters that combine autonomous navigation frames, environmental sensors, multibeam echosounders to collect topography, temperature, and other data that are utilized for the world of shipping. Researchers tested an unmanned ship tool that can move automatically and can determine the direction to a predetermined location. Output. The test results show that the unmanned ship can walk to the planned route. This unmanned ship is equipped with a Micro Air M10G GPS sensor, LoRa Sensor, Arduino Mega 2560 Pro Sensor... In testing as many as 15x experiments were carried out including 10x experiments carried out to turn right and 5x experiments with turning left. The experiments carried out were very effective and according to what had been planned, but there were 4x experiments that had differences from 11x experiments due to water waves and winds that were too large so that the ship was unstable.

Particularly in tropical nations like Indonesia and Malaysia, oil palm plantations have grown to be a significant economic sector worldwide. Although these plantations offer substantial economic advantages, there are a number of environmental effects associated with their growth that must be taken into account. The ecological effects of oil palm plantations, such as deforestation, biodiversity loss, greenhouse gas emissions, and air and land pollution, are covered in this article. It also covers mitigation techniques, such the use of sustainable farming methods, ecosystem poisoning, and ecosystem restoration, to strike a balance between financial gains and environmental extinction. Without compromising its financial gains, the palm oil sector may grow in a more ecologically responsible way with the correct strategy.

This study aims to analyze the factors that cause the decline in intercooler performance on the main engine of KM Bintan Utama, its impact on engine performance, and the corrective measures that need to be taken. Based on the analysis, three main factors contribute to the decrease in intercooler performance: dirty air fins in the intercooler, lack of routine maintenance, and blockage in the seawater pipe filter. This decline in intercooler performance significantly affects the main engine, such as increased engine temperature, which can lead to damage to critical components. To address this issue, several actions need to be taken, including cleaning the intercooler air fins regularly and ensuring maintenance is carried out according to the recommended manual. Proper maintenance implementation will help maintain the performance of the main engine and extend the life of the intercooler and other components.

Work safety is an important aspect in the construction industry, especially in girder erection work that involves high risks due to the installation of large beams and the use of heavy equipment. This study aims to assess the implementation of work safety on the Solo-Yogyakarta-YIA Toll Road construction project by referring to safety standards from the Ministry of Public Works and related regulations. The research data consisted of 28 project photos covering girder erection preparation work, girder erection, and girder bracing. The assessment was conducted by three certified construction OHS experts using a checklist of work safety standards. The results of the Bayes Theorem analysis showed that all girder erection preparation work (7 photos) and girder erection (15 photos) were performed safely with a value of P(H|Ecomb) = 1. On girder bracing work, five out of six photos were rated as safe, while one photo showed unsafe work. This finding indicates that although most of the work has met safety standards, there are still aspects that require improvement. This study recommends a thorough implementation of safety attributes, especially on aspects that have not met the standards, to minimize the risk of occupational accidents on girder erection work in construction projects. This step is important to ensure worker safety and support the creation of a safer work environment.

Car washes have become increasingly popular in some areas, but this growth has also had a negative impact on environmental quality, as untreated wash water is often discharged directly into car wash drainage systems without any prior treatment. This discharge of unfiltered wastewater can lead to high levels of COD (chemical oxygen demand) and surfactants in nearby water sources if carried out intensively. Much of the wastewater is often classified as waste. It is discharged by car wash operators into the drainage system and eventually into smaller waterways. In 2014, the Minister of the Environment highlighted the importance of managing cleaning waste due to its harmful effects on the environment and health. Based on the Pekanbaru Municipality's Regional Regulation No. 8 of 2003 on the payment of liquid waste treatment control permit, which stipulates that every industry must carry out waste treatment before discharging into the environment and each industry must also  pay a fee, this study will allow the design of absorption wells, which will be used to treat liquid waste from car washes, so that the wastewater absorbed into the ground is no longer a contaminated liquid waste. By treating the waste by the method of infiltration pits, it is hoped that the environment and the health of the residents around the laundry will be well preserved.

Indonesia, as an archipelagic country with over 17,000 islands, faces significant challenges in providing electricity access, particularly to small and remote islands. One promising solution is Solar Power Plants (PLTS), both land-based and floating solar plants that utilize water surfaces, suitable for areas with limited land availability. This study evaluates the economic feasibility of floating solar plants and land-based solar plants using the Levelized Cost of Electricity (LCoE) approach. LCoE encompasses all costs of construction, operation, maintenance, and energy production over the plant's lifespan, serving as a key benchmark in selecting power generation technologies. The findings show that the LCoE for floating solar plants is Rp11,197.00/kWh, lower than land-based solar plants at Rp11,769.00/kWh, although both exceed the electricity purchase price in Kodingareng, South Sulawesi, at Rp2,460.00/kWh. This difference is influenced by higher construction costs for floating solar plants but offset by greater energy output and lower operation and maintenance costs. This research provides a basis for developing solar power systems in archipelagic regions, emphasizing efficiency and sustainable energy solutions.

Companies operating in the electricity accumulator industry sector, in the production process produce waste in the form of hazardous and toxic materials (B3). The management of B3 waste is carried out based on the provisions stated in the Regulation of the Minister of Environment and Forestry Number 6 of 2021 concerning Procedures and Requirements for Hazardous and Toxic Waste Management. Therefore, the waste generated requires special handling to prevent environmental pollution. Therefore, the waste generated requires special handling so as not to pollute the environment. Hazardous waste management in the electricity accumulator industry includes various stages, both for waste in the solid and liquid phases, namely identification, inventory, packaging, labeling and symbolization, storage, and transportation carried out by third parties. This research aims to assess the current condition of hazardous waste management in the electricity accumulator industry, evaluate it, and provide recommendations that are in line with applicable regulations. The research method used is a descriptive approach. In the inventory process, the electricity accumulator industry requires Temporary Storage Sites (TPS) to store B3 waste before transportation by third parties.

Cost Recovery is a vital element in production sharing contracts (PSCs) within the oil and gas sector, allowing contractors to recover costs incurred during exploration and production through revenues generated from oil and gas production. This mechanism has a direct impact on the sustainability of operations and the management of natural resources, which in turn plays a critical role in supporting the national economy.This study aims to analyze the role and contribution of the cost recovery scheme in enhancing Indonesia's economic development, focusing on optimizing state revenue, increasing both foreign and domestic investment, and promoting the development of sustainable energy infrastructure. The method used in this study is a literature review, which includes data from journals and published articles.The main findings of the study show that the cost recovery scheme not only functions as an instrument to ensure the sustainability of upstream oil and gas operations but also has a significant impact on other economic aspects. In the context of national economic development, this scheme contributes to increasing state revenue through taxes and royalties, creating jobs, and supporting local economic development in oil and gas-producing regions. Moreover, cost recovery opens up opportunities for technology transfer and enhances human resource capacity in the energy sector.

Environmental licensing in the housing sector plays an important role in ensuring that housing development is carried out in compliance with applicable environmental regulations. With the rapid development of the housing sector, it is important to ensure that licensing is carried out with sustainability principles that take into account the impact on the environment. This article examines the role of environmental licensing in the housing sector, the challenges faced in its implementation, and the importance of a sustainable approach to the licensing process to encourage environmentally friendly development

Social media now plays an important role in everyday life and has a great impact on society and people. The drawbacks of social media are discussed in this study. Problems that arise from social media include the rise of fake news, digital addiction, mental health problems, and cyberbullying. To optimize the positive impact of social media and reduce its negative impact, social media must be used wisely. This study aims to analyze the effect of social media use on adolescent mental health. This study used a survey method involving 200 adolescents aged 13-18 years as respondents. Data was collected through a questionnaire that measured the frequency of social media use, types of content consumed, and mental health indicators such as depression and anxiety. The results showed that there was a positive correlation between the frequency of social media use and the level of depression and anxiety in adolescents. In addition, exposure to negative content such as cyberbullying and others also contributed to the decline in mental health. This study concludes that excessive and unhealthy social media use can negatively impact adolescents' mental health.