The development of information technology has currently been growing rapidly and provided many benefits in various fields, one of which is the library. The application of information tech-nology to the library is usually called a digital library (digital library). Digital library makes it easy for users to obtain information sources easily. Users can quickly search for book data in-formation, find out the number of books available, makes direct borrowing etc. Libraries in a university support the implementation of education, and teaching, research and community ser-vice. The library in the university has a collection of reference books and research reports that are always obtained every year.The presence of smartphone technology makes it easier for users to be comfortable, fast and easy in completing their work. However, there are difficulties which have to deal with while the display interface of a web-based information system does not support to be displayed on smartphone screen. This has an impact on the difficulties encountered by users in accessing the information. Currently, the digital libraries at Muhammadiyah University of Purworejo are web-based. But it has obstacles with display interface which does not support to be displayed in mobile version. Besides that there are menus that are still not categorized correctly. In order to improve access and give users easiness, this research made the design of a mobile-based Digital Library.

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An internship is a mandatory course to be taken by a sixth-grader. Students should finish the course by either apprenticing or making a product in the form of software. The problem often is that students enroll and choose partners. The student files already stored should be matched to the data of the previous semester conventionally. Another problem is that students select partners based not on the field of interest but based on following their friends. Students have difficulty completing an apprenticeship. Therefore, the study examined the identification of an apprentice by using the simple, adapting method, the research object was the student of the semester VI apprentice, the method of storing data using literature, observation, and interviews. Research results from simple standard weighting show K1 criteria at 0.75, K2 at 0.5, structural criteria at 0.25, and requirement criteria of 1. The results of the accuracy test are 80% so that the SAW method can be developed as a decision support system in determining internship lecturers based on the student's field of interest.

Indonesia is one of countries that produces waste as much as 21,88 million tons in 2021. Waste is a last thing, which has not been used (wasted), that sources from the impact of human activities, or natural that has not had economic value. The waste management, which has not been handled well, becomes a problem until it can affect soil to groundwater channel pollution. The waste management in Sido Luhur Hamlet, Bedono Kluwung Village, Kemiri Subdistrict, Purworejo to date is still with the way of burning directly without being sorted that is based on the waste types. This problem becomes a serious concern for the village government. To strengthen the education of an importance of maintaining environment cleanliness, the dedication team socialized waste treatment to be compost. This activity was participated by fifteen RT 003 RW 003 Sido Luhur Hamlet inhabitants. Together with the dedication team, the inhabitants exploited organic waste, and goat feces that were mixed with EM4 solution and produced a sample of solid and no smell compost.