This book presents the development of mechanical powered portable charger to charge mobile phone during disaster recovery. It emphasizes on efficient mechanical energy harvesting circuit for charging mobile phone battery with the utilization of intermediate battery. In this book, Sealed Lead-Acid (SLA) or dry battery was selected as an intermediate battery to protect the Lithium Ion battery which is very sensitive to overcharging and discharging. Three modules are employed in this book, including a DC/DC boost converter circuit, SLA charging circuit and mobile phone charging circuit utilizing Arduino microcontroller. During disaster, main power supply will be interrupted. If only the victims can communicate through their mobile phone, there will be high chance that they can be rescued by the rescue team. Note that, the portable cell tower can be set up by the relevant authorities during disaster. This book can benefit government, NGO, or volunteers during disaster, as well as many people in disaster prone area.

This book presents the development of solar powered portable charger to charge mobile phone during disaster recovery. It emphasizes on efficient solar energy harvesting circuit for charging mobile phone battery with the utilization of intermediate battery. In this book, Sealed Lead-Acid (SLA) battery was chosen as intermediate battery to protect the Lithium Ion battery which seems very sensitive to overcharging and discharging. Concerning on delivering the most efficient portable charger, polycrystalline silicon solar panel was selected which may supply up to 400mW of average power. In addition, Pulse Width Modulation (PWM) charging method was employed using Arduino microcontroller. During disaster, main power supply will be interrupted. If only the victims can communicate through their mobile phone, there will be high chance that they can be rescued by the rescue team. Note that, the portable cell tower can be set up by the relevant authorities during disaster. This book can benefit government, NGO, or volunteers during disaster, as well as many people in disaster prone area.

Nowadays, the popular methods of information delivering include e-learning, cyber-learning and other terms that describe the new ways of learning. In order to improve the learning process, the Virtual Learning Content Management System (V-LCMS) for Problem-Based Learning (PBL) Courses developed at the College of Professional MARA Indera Mahkota. The proposed system aims to develop a web site using Iterative and Incremental Development prototype. The programming language chosen is PHP 5.2.5, MySQL 5.0 as the database and Apache 2.2.8 as the the web server. The V-LCMS enables easier teaching and learning process between instructors and students. The students do not have to wait for the notes to be copied. Instead, the students can access the notes through V-LCMS. This facilitates the students to study by themselves. Other advantage of V-LCMS is, it eases students to interact with instructors using forums or chat rooms, especially for the implementation of PBL courses. Overall, not only the system assists the instructors, but also it supports their students in terms of receiving the knowledge imparted.