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Localization of energy for a regular black hole solution in an asymptotically de Sitter spacetime geometry

100%
Radinschi I., Grammenos T., Spanou A.
Open Physics
|
2011
|
vol. 9
|
issue 5
1173-1181
EN
The energy and momentum distributions of a regular black hole in a four-dimensional, asymptotically de Sitter spacetime geometry are computed, whereby the Einstein, Landau-Lifshitz, Weinberg and Møller energy-momentum complexes are utilized. It is found, for all prescriptions applied, that the momentum distribution vanishes, while the energy distribution depends on the mass parameter M, the electric charge Q, and the cosmological constant Λ. In addition, various limiting cases are discussed.
2
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Unification Principle and a Geometric Field Theory

84%
Wanas M. I., Osman S. N., El-Kholy R. I.
Open Physics
|
2015
|
vol. 13
|
issue 1
EN
In the context of the geometrization philosophy, a covariant field theory is constructed. The theory satisfies the unification principle. The field equations of the theory are constructed depending on a general differential identity in the geometry used. The Lagrangian scalar used in the formalism is neither curvature scalar nor torsion scalar, but an alloy made of both, the W-scalar. The physical contents of the theory are explored depending on different methods. The analysis shows that the theory is capable of dealing with gravity, electromagnetism and material distribution with possible mutual interactions. The theory is shown to cover the domain of general relativity under certain conditions.
3
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Sources of inertia in an expanding universe

84%
Prytz K.
Open Physics
|
2015
|
vol. 13
|
issue 1
EN
In a cosmological perspective, gravitational induction is explored as a source to mechanical inertia in line with Mach’s principle. Within the standard model of cosmos, considering the expansion of the universe and the necessity of retarded interactions, it is found that the assumed dynamics may account for a significant part of an object’s inertia.
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