Prespacetime Journal Volume 6 Issue 3: Gravity, Field Equations & Cosmological Models

Prespacetime Journal ("PSTJ," http://www.prespacetime.com) is a publication in which physicists, mathematicians and other learned scholars publish their research results and express their views on the origin, nature and mechanism of spacetime and its possible connection to a prespacetime. It is also a journal where all learned scholars can present their models and experimental results on elemental particles, fundamental forces including gravity and related topics. This is PSTJ Volume 6 Issue 3 first published in March 2015. It is entitled "Gravity, Field Equations & Cosmological Models" and contains following articles: (1) Matrix Approach to Petrov Classification; (2) The Motion of the Test Body in the Gravitation Field of a Moving Source in Lorentz-invariant Gravitation Theory; (3) Scale Independent Unified Quark Physics; (4) Magnetized Bianchi Type-III String Bulk Viscous Cosmological Models in Lyra Geometry; (5) Two-Fluid Cosmological Models in Hypersurface-Homogeneous Spacetime; (6) Dark Energy Cosmological Model in f(R,T) Theory of Gravity; (7) Five-dimensional Bulk Viscous Cosmological Model with Wet Dark Fluid in Saez-Ballester Theory of Gravitation; (8) On the Gauge Identities & Genuine Constraints for Certain Lagrangians; and (9) On the Ratio of Nuclear Binding Energy & Protons Kinetic Energy.