John Leslie – Universes

Astronomy and Cosmology

Unfolding Meaning: A Weekend of Dialogue with David Bohm
De Sitter Invariant Special Relativity
John Leslie – Universes
Modelling Pulsar Wind Nebulae By Diego F. Torres
Nuclear Planetary Science: Planetary Science Based On Gamma-ray, Neutron And X-ray Spectroscopy

Unfolding Meaning: A Weekend of Dialogue with David Bohm

David Bohm | 1996 | PDF | ISBN: 0415136385 | 193 pages | 6 MB

De Sitter Invariant Special Relativity

Mu-Lin Yan | 2015 | PDF | ISBN: 9814618705 | 277 pages | 2 MB

Einstein’s Special Relativity (E-SR) is the cornerstone of physics. De Sitter invariant SR (dS/AdS-SR) is a natural extension of E-SR, hence it relates to the foundation of physics. This book provides a description to dS/AdS-SR in terms of Lagrangian-Hamiltonian formulation associated with spacetime metric of inertial reference frames.
One of the outstanding features of the book is as follows: All discussions on SR are in the inertial reference frames. This is a requirement due to the first principle of SR theory. The descriptions on dS/AdS-SR in this book satisfy this principle. For the curved spacetime in dS/AdS-SR theory, it is highly non-trivial.
Readership: Students and professionals who are interested in de Sitter and anti-de Sitter invariant Special Relativity.

John Leslie – Universes

Published: 1990-01-12 | ISBN: 0415041449, 0415139554 | PDF | 240 pages | 0.7 MB

This book considers recent claims that our universe is ‘fine tuned for producing Life’. For instance, that if its early expansion speed had been smaller by one part in a million then it would have recollapsed rapidly; that with an equivalently tiny speed increase, no galaxies would have formed; and that either way, this universe would have been lifeless. Many cosmologically important numbers can seem to show similar tuning. Did God choose them with immense care? Alternatively, may there exist a great many universes, huge cosmic domains very varied in their properties? Living beings would then observe only the (perhaps very rare) universes with life-permitting properties. Universes discusses the alleged evidence of fine tuning; mechanisms by which a very varied set of universes might be generated; various forms of Anthropic Principle; and whether belief in God could be preferable to accepting the universes in vast numbers.

Modelling Pulsar Wind Nebulae By Diego F. Torres

English | PDF,EPUB | 2017 | 318 Pages | ISBN : 331963030X | 17.94 MB

In view of the current and forthcoming observational data on pulsar wind nebulae, this book offers an assessment of the theoretical state of the art of modelling them. The expert authors also review the observational status of the field and provide an outlook for future developments.
During the last few years, significant progress on the study of pulsar wind nebulae (PWNe) has been attained both from a theoretical and an observational perspective, perhaps focusing on the closest, more energetic, and best studied nebula: the Crab, which appears in the cover. Now, the number of TeV detected PWNe is similar to the number of characterized nebulae observed at other frequencies over decades of observations. And in just a few years, the Cherenkov Telescope Array will increase this number to several hundreds, actually providing an essentially complete account of TeV emitting PWNe in the Galaxy. At the other end of the multi-frequency spectrum, the SKA and its pathfinder instruments, will reveal thousands of new pulsars, and map in exquisite detail the radiation surrounding them for several hundreds of nebulae.
By carefully reviewing the state of the art in pulsar nebula research this book prepares scientists and PhD students for future work and progress in the field.

Nuclear Planetary Science: Planetary Science Based On Gamma-ray, Neutron And X-ray Spectroscopy

World Scientific | English | Nov 2017 | ISBN-10: 9813209704 | 180 Pages | PDF | 20.6 mb

by Nobuyuki Hasebe (Author),? Kyeong Ja Kim (Author),? Kunitomo Sakurai (Author)
Nuclear planetary science has come to play an important role in our understanding of the origin and evolution of the planetary bodies in our solar system. A newly established branch of planetary science, its study aids in humankind’s exploration of the present states of the structures of various planetary bodies (including the Earth), their atmospheres and their satellites, as well as small celestial bodies (e.g. asteroids), through direct observation. Knowing the elemental composition of the planetary bodies is essential in order to understand the formation and evolution of planetary bodies -C just as important as it is to know the mass, radius, density and orbit of the celestial body.
Suitable for students and specialists interested in the much wider field of Earth and Planetary Science, topics related to the planets and asteroids in the solar system are dealt with in this book. Techniques related to nuclear planetary science’s nuclear cosmochemical and geological methods are also covered in this book.