Results 41 to 50 of about 338,003 (249)
Modified theories of gravity with non-minimal curvature-matter coupling
, 2009 In this contribution one examines the generalization of the $f(R)$ theories of gravity where one introduces a non-minimal coupling between curvature and matter. This model has new and interesting features.
Bertolami, Orfeu +1 more
core +1 more source
On the Stability of Einstein Static Universe in Doubly General Relativity Scenario [PDF]
, 2015 By presenting a relation between average energy of the ensemble of probe photons and energy density of the Universe, in the context of {\it gravity's rainbow} or {\it doubly general relativity} scenario, we introduce a rainbow FRW Universe model.
Darabi, F. +3 more
core +2 more sources
Advanced Engineering Materials, EarlyView.Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir +5 more
wiley +1 more source
Unveiling the Universe: Tsallis Holographic Dark Energy and Modified Logarithmic f(R) Gravity [PDF]
Iranian Journal of Astronomy and AstrophysicsIn this paper, we delve into the intricacies of the Tsallis holographic dark energy model within the framework of a modified logarithmic f(R) gravity. This gravity model is distinctive due to its composition, which includes both polynomial terms and a ...
Fatemeh Baziar, Jafar Sadeghi
doaj +1 more source
Advanced Functional Materials, EarlyView.In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund +6 more
wiley +1 more source
Rotating Casimir wormholes in f(R) gravity: a modified gravity extension of exotic spacetime models
European Physical Journal C: Particles and FieldsWe investigate the construction and viability of rotating Casimir wormholes within the framework of f(R) gravity, focusing on models of the form $$f(R) = R + \alpha R^2$$ f ( R ) = R + α R 2 .
Behnam Pourhassan
doaj +1 more source
New insights on the matter-gravity coupling paradigm
, 2012 The coupling between matter and gravity in General Relativity is given by a proportionality relation between the stress tensor and the geometry. This is an oriented assumption driven by the fact that both the stress tensor and the Einstein tensor are ...
Jan Steinhoff +3 more
core +1 more source
Reheating and gravitino production in braneworld inflation [PDF]
, 2005 We consider the constraints that can be imposed on a wide class of Inflation models in modified gravity scenarios in which the Friedmann equation is modified by the inclusion of $\rho^2$ terms, where $\rho$ is the total energy density.
D. Langlois +3 more
core +1 more source
Advanced Functional Materials, EarlyView.Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana +2 more
wiley +1 more source