Automated uninterruptible power supply battery protector: case study of Tanzania atomic energy commission, Arusha-Tanzania

A Project Report Submitted in Partial Fulfilment of the Requirements for the Degree of Master of Science in Embedded and Mobile Systems of the Nelson Mandela African Institution of Science and TechnologyUninterruptible Power Supply (UPS) is electrical apparatus that provides emergency power to its load when the input power source fails and manages power fluctuations through its battery during power failure to allow a user to save work and shut down a system procedurally. The UPS’ electrical ability depends on its battery’s strength. At Tanzania Atomic Energy Commission (TAEC) users mostly leave their UPS on as they go home, and when there is blackout, the UPS batteries get drained to zero leading to a significant number of UPS getting damaged in a year. Automated Uninterruptible Power Supply Battery Protector (AUPSBP) is developed to protect UPS battery at the institution using Kanban Agile methodology which supported teamwork. The AUPSBP monitors the voltage from mains to UPS using a voltage sensor. When the sensor detects a lack of voltage from the mains to UPS, AUPSBP triggers timer counting down towards switching the UPS off. When tested, AUPSBP switched off the UPS when the set time of 5 minutes elapsed, and when UPS battery voltage was <100V protecting UPS battery from draining to zero during blackout. It sent Short Messages using Global System for Mobile communication when mains power was switched off, and when UPS was switched off before the set time of 5 minutes elapsed. The AUPSBP is effective for switching off UPS before its battery drains to zero to prevent battery damage on different types and sizes of UPSs with only changes in switch and timer. Therefore, AUPSBP is needed to protect UPS at TAEC

Development of Mini Smart Library Direction System Incorporated with the Library of Congress Classification System: A case study of East African Libraries

This paper focuses on the development and implementation of a Mini Smart Library Direction System that is integrated with the Library of Congress Classification (LCC) System to facilitate easy book tracing in libraries. A library is a storage building with ample information about books, etc., and their various topics. &nbsp;The LCC system is a method of categorizing books into classes. Technology is evolving and libraries today are becoming more digitized. This, in turn, helps to facilitate easy access to library bookshelves. Nowadays, many libraries have adopted an electronic system that catalogues books, although the process of searching for a book may vary slightly from one library to another. However, the library user needs to search in the library catalogue to identify the needed book and use the call number to find the book on the shelf. In case the library user fails to locate the book, the librarian assists. This manual method has several drawbacks, including time spent walking around in the library searching for the book, and stress experienced throughout the process. According to case studies conducted at the Nelson Mandela African Institution of Science and Technology in Tanzania, and the University of Juba, South Sudan, it is noted that students are having trouble finding books in libraries. The developed system is based on the Internet of Things, and it connects through Wi-Fi to browse a specific shelf that illuminates based on the user's preferences via a keypad/mobile application (Blynk). It has a web-based user guide manual. The system was tested against the essential characteristics of embedded and IoT systems. As a result, the system is suitable for usage in supermarkets, warehouse stores, and other inventory management applications