This unique book gives a modern account of particle physics and gravity based on supersymmetry and supergravity, two of the most significant developments in theoretical physics since general relativity. The book begins with a brief overview of the history of unification and then goes into a detailed exposition of both fundamental and phenomenological topics. The topics in fundamental physics include Einstein gravity, Yang-Mills theory, anomalies, the standard model, supersymmetry and supergravity, and the construction of supergravity couplings with matter and gauge fields, as well as computational techniques for SO(10) couplings. The topics of phenomenological interest include implications of supergravity models at colliders, CP violation, and proton stability, as well as topics in cosmology such as inflation, leptogenesis, baryogenesis, and dark matter. The book is intended for graduate students and researchers seeking to master the techniques for building grand unified models.

Tourism is the world's second largest industry employing on an average one out of twenty adult men and women world-wide and the ratio is one out of ten when it comes to the developed countries like USA. The growing ranks of international leisure travellers are being influenced by business travellers who, are flooding into India as a result of economic liberalisation. It is thus imperative that our professional tourism corps be trained to meet these exacting requirements. Both in public and private sectors, the increasing understanding of these needs is leading to the development of institutes, training centres and academic programmes in tourism management. There is thus a great need for comprehensive professional literature. This two-volume series volume tells readers all that they want to know about tourism - its history, networks and intricate operations. Volume Two discusses in detail how different tourism sectors operate and market themselves - travel agencies, tour operators, hotels, restaurants, airlines - as well as the impact of changing technology on their activities.