A Cross-Platform Vehicle Tracking System for Pabna University of Science and Technology with Android and Web Interfaces

2024-07-10T06:03:44+00:00

In recent years, the development of cross-platform applications has gained increasing popularity due to their ability to enhance accessibility, usability, and functionality across multiple devices. This paper proposes a cross-platform vehicle tracking system for Pabna University of Science and Technology (PUST), addressing key challenges in vehicle management, transportation efficiency, and security. The system includes both android and web interfaces designed to provide real-time location monitoring of university vehicles. The primary problems identified are the inefficient tracking of university vehicles, lack of security in vehicle usage, and suboptimal route management. To address these issues, our system leverages modern technologies such as the Google Maps API, Node.js, and the Real-time Firebase Database. The Android app and web-based interfaces allow authorized users to track the real-time location of university vehicles, access detailed vehicle information, and review historical routes. Additionally, the system issues real-time alerts for unauthorized usage or irregular activities. The embedded system uses a Global Positioning System (GPS) and Global System for Mobile Communication (GSM) for tracking and positioning vehicles. The ESP8266 NodeMCU is interfaced serially with a GPS module Ublox NEO6M Receiver to continuously monitor and report vehicle status. The GPS module sends the vehicle’s position (latitude and longitude) to the real-time Firebase database, which then transmits this data to the mobile and web interfaces. The proposed system underwent comprehensive user acceptance tests, yielding satisfactory results that attest to its potential for enhancing vehicle management, transportation efficiency, and security at PUST. This paper details the design, development, and evaluation of the system, highlighting its benefits and outlining future research directions.

Efficiency Enhancement of Lead-Free CsSnGeI3-Based Perovskite Solar Cells Using ZnSe as an Electron Transport Material and Spiro-MeOTAD as the Hole Transport Material

2024-07-18T08:35:33+00:00

Perovskite solar cells are an emerging technology in the field of photovoltaic cells, they have higher efficiency, relatively low production cost, and are more versatile than traditional silicon solar cells. In this research, a cesium tin–germanium triiodide (CsSnGeI₃) perovskite solar cell has achieved high power conversion efficiency and extreme air stability. In this study, lead-free Cs-based perovskite solar cells have been quantitatively analyzed to explore the effect of absorber layer thickness, defect density of the absorber layer, working temperature, series and shunt resistance, acceptor doping concentration using a solar cell capacitance simulator software. For this perovskite solar cell structure, ZnSe is used as a buffer layer, and CsSnGeI3 is used as an absorber layer. ITO material is used as an electron transport layer and Spiro-MeOTAD Transport Layer. Gold is used to make the back contact of this proposed solar cell. In this simulation, the environment-friendly perovskite solar cell achieved an efficiency of 31.22% when the thickness of the buffer and absorber layers was 0.06µm and 1.5µm. The designed outputs will be efficient for the convenient fabrication of the perovskite solar cell.

International Journal of Imminent Science & Technology.

A Cross-Platform Vehicle Tracking System for Pabna University of Science and Technology with Android and Web Interfaces

Efficiency Enhancement of Lead-Free CsSnGeI3-Based Perovskite Solar Cells Using ZnSe as an Electron Transport Material and Spiro-MeOTAD as the Hole Transport Material