Results 41 to 50 of about 1,123,493 (287)
Dark Energy from Cosmological Energy Conservation
Advances in Astronomy, 2023 The value of the gravitational wave energy density is unknown. Current progress in gravitational wave detection suggests that the energy density of the stochastic gravitational wave background (SGWB) will be estimated in the next decades. A derivation of
Manuel Uruena Palomo
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Physics Letters B, 2003 By studying the present cosmological data, particularly on CMB, SNeIA and LSS, we find that the future fate of the universe, for simple linear models of the dark energy equation-of-state, can vary between the extremes of (I) a divergence of the scale factor in as little as 7 Gyr; (II) an infinite lifetime of the universe with dark energy dominant for ...
Tomo Takahashi, Paul H. Frampton
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Physical Review D, 2004 We investigate the possibility of a dark energy component that is scaling with epochs. A phenomenological model is introduced whose energy density depends on the redshift in such a way that a smooth transition among the three dominant phases of the universe evolution (radiation era, matter domination, asymptotic de Sitter state) is achieved. We use the
CAPOZZIELLO, SALVATORE +2 more
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Improvement of airfoil trailing edge bluntness noise model
Advances in Mechanical Engineering, 2016 In this article, airfoil trailing edge bluntness noise is investigated using both computational aero-acoustic and semi-empirical approach. For engineering purposes, one of the most commonly used prediction tools for trailing edge noise are based on semi ...
Wei Jun Zhu +3 more
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Accelerated Universe from Modified Chaplygin Gas and Tachyonic Fluid
Universe, 2022 A cosmological model with an exotic fluid is investigated. We show that the equation of state of this “modified Chaplygin” gas can describe the current accelerated expansion of the universe.
Hachemi Benaoum
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Creep Characterization of Inconel 718 Lattice Metamaterials Manufactured by Laser Powder Bed Fusion
Advanced Engineering Materials, EarlyView., 2023 Herein, the creep characteristics of additively manufactured Inconel 718 metamaterials are investigated. The creep behavior of metamaterials and the effects of microstructural defects are assessed, and the microstructure defects are accurately captured using Kachanov's creep damage model.
Akash Singh Bhuwal +5 more
wiley +1 more source
Interacting agegraphic dark energy models in non-flat universe [PDF]
Phys.Lett.B680:113-117,2009, 2009 A so-called "agegraphic dark energy" was recently proposed to explain the dark energy-dominated universe. In this Letter, we generalize the agegraphic dark energy models to the universe with spatial curvature in the presence of interaction between dark matter and dark energy.
arxiv +1 more source
Changes in Microbial Energy Metabolism Measured by Nanocalorimetry during Growth Phase Transitions
Frontiers in Microbiology, 2018 Calorimetric measurements of the change in heat due to microbial metabolic activity convey information about the kinetics, as well as the thermodynamics, of all chemical reactions taking place in a cell.
Alberto Robador +11 more
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A dark energy multiverse [PDF]
Classical and Quantum Gravity, 2007 We present cosmic solutions corresponding to universes filled with dark and phantom energy, all having a negative cosmological constant. All such solutions contain infinite singularities, successively and equally distributed along time, which can be either big bang/crunchs or big rips singularities.
Robles Pérez, Salvador +3 more
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Voids and overdensities of coupled Dark Energy [PDF]
JCAP 0904:017,2009, 2009 We investigate the clustering properties of dynamical Dark Energy even in association of a possible coupling between Dark Energy and Dark Matter. We find that within matter inhomogeneities, Dark Energy migth form voids as well as overdensity depending on how its background energy density evolves.
arxiv +1 more source