The generator is the main source of electricity on the ship which will power all activities on the ship. With an electricity source supplied by a generator, human work will become lighter because of the help of electrical energy. In order for the generator to work well, it requires maintenance and must always be well controlled, so that the parameters produced by the generator must always be maintained by monitoring these parameters automatically using the ESP32 microcontroller. The parameters measured are current, voltage, power, frequency, work factor, KWh, RPM, temperature and vibration. By measuring the magnitude of these parameters, they can later be used as variables for maintenance and repair of the generator. The sensor used to measure the electrical parameters is the PZEM004t module because it can measure all generator electrical quantities, while temperature uses the DS18B20 sensor and vibration uses the SW420 sensor module. Then to measure the RPM using a potentiometer. The measurement results are displayed on a smartphone screen on the bridge using Internet of Things (IoT) technology sent from the engine room.

Salons and spas in Indonesia need to utilize information technology to improve business performance and provide customers with a more personalized experience. The integration of digital reservation systems, online marketing, and technology-based customer management will help improve operational efficiency and gain valuable customer feedback. Digital reservation systems enable salons and spas to improve business performance by providing easy access to customers, increasing the efficiency of scheduling management, and providing a more personalized experience, which is an important strategy in the competitive digital era. One of the alternative digital reservation systems that can be used by salons and spas in Indonesia is Android-based. This research resulted in an Android-based digital reservation system that focuses on customer experience. The object of the research is Spaque Salon & Day Spa, an MSME in Indonesia. Through mobile technology, customers can easily book and manage their treatments. Test results showed positive feedback regarding the user interface, reservation steps, and interactive features. The system also helps with schedule management, additional services, offers, as well as revenue and financial tracking. This research combines customer and technology perspectives, contributing to the salon and spa industry as well as mobile technology developers.

In preparing for the accreditation of units, study programs, and tertiary institutions to achieve a superior rating, Universitas Atma Jaya Yogyakarta (UAJY) often faces challenges in gathering and accessing the necessary resources. These difficulties stem from the accreditation preparation process, ineffective resource management, a lack of data integration, and restricted resource access. Taking advantage of advancements in information technology, UAJY has adopted the ERP Laboratory Information Management System (LIMS) to effectively manage the resources within its educational laboratories. These laboratories serve as a vital support unit in fulfilling the Tri Dharma of Higher Education and play a significant role in enhancing the learning process at the university. Enterprise Resource Planning (ERP) is a strategic tool that can provide organizations with a competitive edge by synchronizing, integrating, and optimizing data. The implementation of ERP LIMS serves as a solution for better resource management within the UAJY Informatics Department's educational laboratories.

Based on data from the Lamongan Regency Fisheries Service released in 2020, the total production of fish and shrimp cultivation reached 59,728.16 tons in 27 fisheries development areas throughout Lamongan Regency. And for the village of Bogobabadan capable of producing 2 tons per year. However, currently the marketing of fish and shrimp cultivation business products in the city of Lamongan is still not optimal and only uses traditional techniques, which are only distributed to industrial factories and conventional business sectors around the development area and sold to collectors at prices below market prices.
 The objectives of this research are (1) to implement E-business for fish and shrimp farming in Lamongan. (2) what are the benefits obtained after implementing e-business for fish & shrimp farming. The subjects of this study were fish and shrimp cultivators in the village of Bogobabadan, Karang Binangun District, Lamongan Regency. The method used is using SWOT analysis (Strength, Weakness, Opportunities, Threats) and as an E-Business solution design using Usecase Diagrams, Activity Diagrams and User Interface / UI Website Design.
 The results obtained from this study can help fish and shrimp farmers to increase product sales through an online system.

The rapid development of information and communication technology influences changes in aspects of life in the economic sector. The application of information and communication technology supports business development. The development of the internet has become a technology that makes business activities such as marketing and sales easier. The growth of internet users in Indonesia reached 78% of the total population. E-commerce users in Indonesia reach 34.10% of all business people in Indonesia. One place to sell online is through e-marketplace. Many e-marketplaces require sellers to select e-marketplaces as a place to sell their products online. Each e-marketplace has different characteristics, so you must consider many factors when choosing an e-marketplace. In this research, it is known that two factors are formed based on factor analysis, namely the Product Quality Factor, the Service and Quality Factor, and the System Factor. In addition, the market selection model was determined using binary logistic regression analysis. The model formed in this research is the e-marketplace selection model Tokopedia, Shopee, and Lazada. Based on the results of the feasibility model using binary logistic regression, it produces an overall e-marketplace selection model with an accuracy level of 76.13%. This evaluation model can be used by sellers who want to choose a market that suits the products offered to increase profits.

The main objective of this research is to improve the operating efficiency and performance of ship main engines by optimizing coolant flow. Improper coolant flow can cause excessive temperature rise in the engine, which in turn can reduce engine life and efficiency. In this research, the coolant flow control system is implemented using the fuzzy logic method. Fuzzy logic allows modeling that is more adaptive to parameter variations and uncertainties in the operational environment. Fuzzy rules are developed based on practical knowledge of experts and operational data related to the host machine. The test was carried out through a simulation using a water flow control circuit that supplies the coolant to the ship's main engine with the main components being an ESP32 microcontroller chip and three DS18B20 temperature sensors. The results of this research show that the use of fuzzy logic in regulating coolant flow is able to provide a faster and more accurate response to changes in engine operational conditions. This has the potential to increase cooling efficiency and prevent engine over-temperatures, which can ultimately increase the overall service life and performance of the host engine. The practical implications of the results of this research can be applied in the development of more intelligent and adaptive control systems for various types of host machines, with the potential to increase operating efficiency and reduce the risk of damage due to excessive temperatures

EOT (Engine Order Telegraph) is the embodiment of a machine-human interface that is controlled by the captain of the ship for safe and sustainable ship maneuvers as a basic part of a connected remote propulsion system. Remote control systems on modern ships usually have a control transfer system that allows control to be transferred between locations. Remote control is usually possible from two locations: the platform and the Engine Control Room (ECR). Some ships do not have a remote control handle on the ECR. When in bridge control mode, the bridge handle directly controls the engine set point. When in Engine Control Room mode, the bridge handle sends a telegraph signal to the ECR and the ECR handle controls the control system set point. In local control, the remote control system is inactive and the bridge handle sends a telegraph signal to the local control position and the machine is operated by its manual control in the engine room. In this study, an EOT device will be realized using the Arduino Mega2560 microcontroller and data communication using the RS485 serial from the bridge to the engine control room.

This study aimed to analyze the steps contained in the updated model. The model includes six interrelated dimensions of information system (IS) success, namely system quality, information quality, service quality, user satisfaction, and net benefits. The research method used is an explanation with a quantitative approach. The type of research conducted is a survey, where data is collected through filling out questionnaires through Google Form. The data used in the study was collected between January and March 2023. The study sample consisted of 96 respondents who had filled out questionnaires. The results showed that hypothesis 1 was accepted, which showed that the quality of information had a positive effect on customer satisfaction, with a P-Values value of 0.012. However, hypothesis 2 was rejected, which showed that the quality of the system had no effect on customer satisfaction, with a P-Values of 0.185. Furthermore, hypothesis 3 is accepted, indicating that service quality positively affects customer satisfaction, with a P-Values of 0.000. Hypothesis 4 is also accepted, which shows that customer satisfaction positively affects net benefits, with a P-Values of 0.000.
 
 Keywords: net benefit, user satisfaction, information quality, service quality, system quality

The COBIT framework has evolved into COBIT 2019 and is still the most widely used framework by IT auditors who use complete or customized model components to assess IT governance in an organization or company. COBIT has made it clear that to gain a complete insight into the governance model in an organization, IT auditors must incorporate organizational culture assessment into the audit approach. This study aims to analyze the implementation of the COBIT 2019 framework to improve information technology performance in Tokopedia. This study uses a qualitative descriptive approach where data collection is carried out using primary and secondary data from direct observations of Tokopedia's e-commerce system through tokopedia.com pages and literature reviews from several relevant journal articles. The results showed that the results of the evaluation of the performance of information technology governance in the Tokpedia e-commerce system that focuses on the DSS (Deliver, Support, and Service) domain show that some e-commerce systems still do not fully carry out good information technology delivery, support, and services.