Böcker av Ravi Ravindra

Head waves – also called refraction arrivals, lateral waves, or conical waves – have been used extensively in near-earthquake studies, geophysical prospecting, and deep-crustal seismological investigations. In the past, research was confined largely to the kinematic characteristics of the waves, but emphasis is now being given to the dynamic characteristics: amplitudes, spectra, and wave forms. In the last fifteen years, several new mathematical and computational techniques have been developed to study these waves.This is an advanced, technical book presenting a consistent theory of head waves, using methods developed in the famous Leningrad school under G.I. Petrashen and his colleagues. It proceeds from a consideration of the simplest problem of one interface to a study of the situation in which there are many interfaces (some of which may not be plane or parallel to one another) and the material between the interfaces is not necessarily homogenous. The method is used principally, though not exclusively, that of ray series in which the displacement vector is expressed in terms of an asymptotic series in inverse powers of frequency. The volume includes numerical data and an extensive bibliography.This book is intended as a text for graduate and senior undergraduate students in geophysics, and as a reference work for practising seismologists and research workers.

Explores St. John’s Gospel from an Eastern perspective to reveal the interconnectedness of all faiths and the need for interfaith dialogue• Takes readers beyond academic and historical analyses by exploring the mystical foundation of the Gospel• Includes the full text of the Gospel of John interwoven with passage-by-passage interpretationsThe Gospel of John is different from the other canonical gospels in its overall point of view concerning Jesus Christ and his mission on earth. It is much more cosmological in scale and mystical in nature and has long been considered more esoteric. The Gospel of John in the Light of Indian Mysticism presents an unusual and rewarding exploration of this Christian text from a Hindu perspective as Ravi Ravindra takes us into the heart of St. John’s words, eloquently and convincingly revealing the interconnectedness of all faiths and the growing need in today’s world for interfaith dialogue. For those concerned with the emergence of a universal spirituality, Ravindra provides a source of light, a translucent pool of wisdom that offers from its depths an immense and lasting spiritual vision.