Solar energy is clean as it does not emit any form of gases that harm the environment. The efficiency level of the best solar panel in the market nowadays alone is still considered low, but if there is a two-axis sun tracker controlling the solar panel, conversion efficiency is able to improve by about 40%. Difficulty arises when designing the mechanism of sun tracker that can provides high accuracy in the angle tilted by the sun tracker to keep the solar panel perpendicular to the direction of maximum sunlight intensity in order to maximize the current generated for charging...

Due to the constrained bandwidth and storage capacity, medical images must be compressed before transmission and storage most of the time. However, the compression will reduce the image fidelity, especially when the image is compressed at low bit rate, which cannot be tolerated in medical field. In this book, the compression performance of the newer JPEG2000 and the conventional JPEG is compared. Image quality are measured both objectively and subjectively. Generally, there are two kind of compression - lossless and lossy. Here, the controversial lossy compression is used although...

A sensor-based solar cell charging system with dual-axis solar tracker is designed and constructed in this project. The design of the dual-axis solar tracker increases the output efficiency of the solar panel and it is preferred for its higher efficiency and flexibility from the rotational of azimuth and altitude axis.The sensor control system that controls the dual-axis solar tracker can precisely detect the position of the sun so that the solar panel can align to it and receive the highest intensity of sunlight, thus maximize its output power.The solar charger is specifically designed to...