Results 61 to 70 of about 18,336 (194)
Charged Fluid Dynamics in Scalar-Tensor Theories of Gravity with Torsion
, 2007 n scalar-tensor theories of gravity with torsion, the gravitational field is described in terms of a symmetric metric tensor $g$, a metric-compatible connection $\nabla$ with torsion, and a scalar field $\phi$.
Wang, Chih-Hung
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A Re‐Examination of Foundational Elements of Cosmology
Fortschritte der Physik, Volume 74, Issue 3, March 2026.ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley +1 more source
Chern-Simons modification of fluid mechanics
Physics Letters BWe show that the hydrodynamics of the perfect fluid admits a natural modification that incorporates a chiral gravitational anomaly (also known as a mixed gauge-gravity anomaly) alongside the chiral current anomaly.
P.B. Wiegmann
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On the initial singularity and extendibility of flat quasi-de Sitter spacetimes
Journal of High Energy Physics, 2023 Inflationary spacetimes have been argued to be past geodesically incomplete in many situations. However, whether the geodesic incompleteness implies the existence of an initial spacetime curvature singularity or whether the spacetime may be extended ...
Ghazal Geshnizjani +2 more
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The Modern Language Journal, Volume 110, Issue 1, Page 90-110, Spring 2026.Abstract This duoethnographic study explores how two nonnative returnee English teachers in China negotiate their professional identities through chronotopically layered transnational literacy experiences. Drawing on the concept of the chronotope—the interconnectedness of time, space, and personhood—the analysis identifies three chronotopic ...
Shan Chen, Luping Sun
wiley +1 more source
Journal of the Society for Information Display, Volume 34, Issue 2, Page 49-67, February 2026.Modern AI systems can now synthesize coherent multimedia experiences, generating video and audio directly from text prompts. These unified frameworks represent a rapid shift toward controllable and synchronized content creation. From early neural architectures to transformer and diffusion paradigms, this paper contextualizes the ongoing evolution of ...
Charles Ding, Rohan Bhowmik
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Singularity Free Inhomogeneous Models with Heat Flow
, 1993 We present a class of singularity free exact cosmological solutions of Einstein's equations describing a perfect fluid with heat flow. It is obtained as generalization of the Senovilla class [1] corresponding to incoherent radiation field.
Bradley J M +12 more
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Hybrid Deference, Hybrid Chance
Philosophy and Phenomenological Research, Volume 112, Issue 1, Page 214-233, January 2026.ABSTRACT If you learn about one kind of chance and nothing else, then you should defer to those chances. But what if you learn about more than one kind of chance? In such “hybrid” cases, familiar chance‐credence principles, like the Principal Principle, go silent when they should intuitively speak.
Alexander Meehan
wiley +1 more source
Timelike and Spacelike Matter Inheritance Vectors in Specific Forms of Energy-Momentum Tensor
, 2005 This paper is devoted to the investigation of the consequences of timelike and spacelike matter inheritance vectors in specific forms of energy-momentum tensor, i.e., for string cosmology (string cloud and string fluid) and perfect fluid.
Baysal H. +4 more
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Advances in Mathematical Physics, 2016 Based on general (1+3) threading of the spacetime (M,g), we obtain a new and simple splitting of both the Einstein field equations (EFE) and the conservation laws in (M,g). As an application, we obtain the splitting of EFE in an almost FLRW universe with
Aurel Bejancu, Hani Reda Farran
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