In infancy, the age of 0-12 months is a very important period in the process of human growth and development. The process of growth and development at this time affects the child's growth and development in the next period and to reduce mortality in infants. Quick and precise information needs from a baby health expert are needed. The method used in making this expert system is forward chaining, where the system is driven by existing facts. These facts are obtained from the patient's physical condition, or referred to as symptoms. With the existence of an android-based expert system, users everywhere can access to the internet and connect. The process of extracting knowledge by means of interviews. Based on the analysis, this expert system has a percentage of program eligibility for use by laymen is 82.7%. Besides that, based on the results of the questionnaire, the ease of the program also gets a large percentage as well

— Pincher is an online platform that is useful for assisting in finding and registering for training classes aimed at facilitating users who want to find their identity and channel their talents and inspirations creatively. This pincher application provides information and distributes training classes by selling class tickets. In its development as an online platform, Pincher still uses the website as a means of distributing training classes owned by Pincher, so this tool is less effective and efficient for users because the Pincher website is too complicated to access using a mobile phone or smartphone. Therefore, to help users access the Pincher application using their mobile phones, Pincher applications are made in a simple form that is applied to mobile applications. In addition, Pincher also does not have a feature that can make it easier for customers to determine the class to be chosen. Therefore this mobile application will be equipped with a system that can make it easier for users to choose attractive classes for customers, namely with a recommendation system.   Keywords— Ticket Selling Application, Flutter, Mobile Application, Recommendation System.

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The Salatiga City Government through the Health Office organizes a system of services and socialization to the community in a preventive manner. The intended community includes P-IRT (Food and Home Industry) which constitutes the food and beverage industry sector which is included in the small industry. In carrying out the delivery of information, employees must carry out a program of training activities as well as by conducting socialization to the community directly, where it is more time consuming, costly, and energy. This also makes the service and delivery of information less efficient. Therefore a web-based and mobile-based information system design is needed to complement these shortcomings. By using the Laravel Framework and Android Programming as well as a collaborative filter algorithm, a web-based application and an Android phone are generated to address the problem. Sharing information and discussions between the public and related agencies is easier to use this system.  

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Requirements engineering is the initial phase of the software development life cycle it is a critical aspect of application development since it has a significant impact on the results of the product being created. This article focuses on the engineering requirements of the web-based application development process for reporting and assisting victims of violence against women using the Loucopoulos and Kanakostas Iterative Requirements Engineering Process Model. The application was created to contribute to the solution of the problem of violence against women in Indonesia, where violence against women is an iceberg phenomenon because not all incidents are reported. Furthermore, victims of violence against women require support in receiving emotional support in the form of counseling, which can be done online via chat or video calls. The results of these requirements engineering are alternative solutions, application feature design, database design, system modeling using UML, and application architecture design. The validation of requirements engineering was carried out using a low fidelity prototype

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