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A clean room is a clean room free from dust and air which can affect product quality. Factors that influence product quality are temperature, humidity and air particles. The condition of the cleanroom cannot be guaranteed to be clean and sterile at all times without a control system. Therefore, a tool was developed that can monitor, control and provide warnings if the room is not in suitable condition. In this research, the PID method was used using the split range control method to control temperature and particles to help optimize the temperature and particle control process. SHT30 sensor for temperature and humidity detection. PMS5003 sensor for air particle detection. The results of sensor detection can be monitored on the website and LCD. The output from the control system will regulate the speed of the blower motor, regulate the temperature and turn on fogging to reduce particles in the air. So the PID method with the split range control method is used as an appropriate temperature control system, so that the temperature and air particles remain in a stable condition. The results of the humidity percentage error are 1.43% and the temperature error is 1.14%, PMS5003 produces errors for particles with a size of 0.1, namely 2.3%, 0.5, namely 5.3%, 1, namely 4.2%, and 5 which is 4%. The PID control system takes approximately 885 seconds to reach 100% setpoint.

The growth and development of toddlers are crucial in determining the welfare of a nation, as this period serves as the foundation for a healthy and productive future generation. Nutritional deficiencies in the early years of life can lead to stunting, which not only hinders a child's physical growth but also negatively impacts their learning abilities and immune system in the future. Addressing nutritional issues is essential by increasing mothers' knowledge. This activity aims to evaluate the effectiveness of nutrition education on balanced nutrition in preventing malnutrition in children at Posyandu Ngireng-ngireng, Kalurahan Panggungharjo. The education program was conducted using a lecture and Q&A method, supported by PowerPoint presentations displayed via LCD. The pre-test and post-test results showed a significant increase in participants' knowledge, with the average score rising from 54.38 to 71.56. These results indicate that the lecture method, supported by visual media and interactive Q&A sessions, effectively enhances mothers' understanding of the importance of balanced nutrition. Therefore, this approach can be adopted in other health education programs to improve community knowledge about nutrition and child health

From this study, the automatic electric oil heater can be used to adjust the temperature value and the automatic electric heater will be able to turn off automatically according to the setpoint temperature value determined through a smartphone device or IoT program. Monitoring can also be done with the app, as well as being able to view temperature values directly through the LCD. This tool is in the form of an electric heater that will be used to heat ship fuel automatically and is more practical and efficient. It is also easier to maintain than a boiler on a ship. The design of this tool is based on accurate calculation of temperature values, with which the process of heating up fuel becomes faster. From the results of this study, a heat sensor that can read the temperature value and the buzzer will sound and the device will automatically turn off if the temperature has reached a specified setpoint. This research was carried out when the ship was about to make a departure to find out the temperature in the heating of the fuel on the ship. Testing Design of an automatic electric oil heater as a replacement for IoT-based thermal oil boiler on this bulk carrier ship, it can be known the disadvantages and advantages of this tool, testing can be done by putting oil into the electric heater, then in a short time the oil will heat up quickly, and the tool will be able to turn off automatically and the buzzer will immediately turn on when the heat has reached the specified temperature. In the temperature setting, it can be set in a smartphone or an app that can adjust the temperature and turn off the appliance from a considerable distance. However, the application must use the internet network and cannot be accessed locally, the use of IoT requires devices and smartphones to be connected to the internet.    

Indonesia is a country located between active earth plates, namely the Eurasian Plate, the Indo- Australian Plate, and the Pacific Plate. These plates are very active plates that move and pose a high risk of earthquake disasters. Therefore, the author wrote an Applied Scientific Work with the title Earthquake Disaster Detection System Using Arduino at the SMI Shipyard port. Earthquake Detection System is made in order to detect earthquake disasters and minimize casualties due to the earthquake disaster. The use of these tools in the world of transportation to detect earthquakes used in coastal areas and port ports located in earthquake-prone areas. The method used is system design to determine the occurrence of an earthquake or vibration detected by the ADXL 355 sensor to reach the output, namely the buzzer and LCD. From that the author makes a tool that can provide warnings to the community or workers in the area to avoid casualties. Earthquake Detection System Using Arduino gives output commands to the buzzer and 220 V lamp. If the vibration is from 2.0 SR, the buzzer and light output will not be active. This system has an accuracy rate of 77.6% and has the largest error rate of 22.4%.