Current power electronics world require semiconductor devices which are capable of highly reliable performances under extreme conditions of voltages and temperature. Wide band gap semiconductors are more suitable in comparison to the traditional semiconductors in such cases. One such semiconductor currently in focus is SiC. This book describes the strucutral, electronic and magnetic properties of SiC. It presents the results of coputational studies of few intrinsic and extrinsic impurities in SiC and their combination too. Many conclusions are found which can throw some light on its practical usefulness. The impurities considered are, B, Al, Ga, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and W. We have used first principle density functional theory with different exchange and correlation schemes using pseudopotentials to perform the electronic structure calculations of several defects in SiC. The theoretical background for computation has also been described in this book.

This text book covers a wide area of interest in digital imaging in the field of dentistry.It deals with the history of digital imaging in dentistry and its present scope.It covers the latest technology used in dental imaging as well as the detailed technical know how of each imaging portfolio.It covers various technologies like CT, MRI, 3D CT, CBCT.It compares various imaging portfolios with each other and gives a overall view of the various technologies available for various treatment protocols for the patients as well as the dentist.This text will also help the technical staff as well as the undergraduates and postgraduates to understand their operated machines in a better way to get the best results for the given treatment.Digitizing dental Imaging has revolutionized the way dentistry is surging ahead in the future.This is a dream come true for dentists.A vision Fulfilled

Gutta Percha is being used in dentistry, especially in the field of endodontics for a very long time with lot of clinical success. This text book describes the manufacturing of the product, its physical and chemical nature and its various forms, used in root canal treatment. Recent manufacturing modifications have taken this material a step further and has made it a material of choice for endodontists till a better replacement is found in the future. This text book will help dental undergraduates and post graduates understand the material better to work more efficiently with it. This text also highlights the various techniques and equipment used for obturating root canal systems with the help of Gutta Percha as a root canal filling material.This material has shown excellent clinical success and more we understand its properties the better handling can drastically improve the success rate of the treatment done. This is nature's gift to endodontists and is here to stay.