Results 21 to 30 of about 6,253,661 (292)
Inbreeding, energy use and condition [PDF]
Journal of Evolutionary Biology, 2009 AbstractIn energetic terms, fitness may be seen to be dependent on successful allocation of energy between life‐history traits. In addition, fitness will be constrained by the energy allocation ability, which has also been defined as condition. We suggest here that the allocation ability, estimated as the difference between total energy budget and ...
T, Ketola, J S, Kotiaho
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Bare Quantum Null Energy Condition [PDF]
Physical Review Letters, 2018 The quantum null energy condition (QNEC) is a conjectured relation between a null version of quantum field theory energy and derivatives of quantum field theory von Neumann entropy. In some cases, divergences cancel between these two terms and the QNEC is intrinsically finite.
Fu, Zicao, Marolf, Donald
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Wormholes without exotic matter in nonminimal torsion-matter coupling f(T) gravity
上海师范大学学报. 自然科学版, 2023 Wormholes are hypothetical tunnels that connect remote parts of spacetime. In General Relativity, wormholes are threaded by exotic matter that violates the energy conditions.
YANG Jing, LIN Ruihui, ZHAI Xianghua
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Dynamical Wormholes and Energy Conditions [PDF]
Progress of Theoretical Physics, 1995 A class of exact solutions of the Einstein field equations representing non-static wormholes that obey the {\em weak and dominant energy conditions } is presented. Hence, in principle, these wormholes can be built with less exotic matter than the static ones.
Wang, Anzhong, Letelier, Patricio S.
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Bulk Viscous Fluid in Symmetric Teleparallel Cosmology: Theory versus Experiment
Universe, 2022 The standard formulation of General Relativity Theory, in the absence of a cosmological constant, is unable to explain the responsible mechanism for the observed late-time cosmic acceleration.
Raja Solanki +3 more
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Quasilocal energy conditions [PDF]
Physical Review D, 1995 The classical value of the Hamiltonian for a system with timelike boundary has been interpreted as a quasilocal energy. This quasilocal energy is not positive definite. However, we derive a `quasilocal dominant energy condition' which is the natural consequence of the local dominant energy condition.
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Spacetime averaged null energy condition [PDF]
Physical Review D, 2010 The averaged null energy condition has known violations for quantum fields in curved space, even if one considers only achronal geodesics. Many such examples involve rapid variation in the stress-energy tensor in the vicinity of the geodesic under consideration, giving rise to the possibility that averaging in additional dimensions would yield a ...
Urban, Douglas, Olum, Ken D.
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Experimental Air Conditioning Energy Evaluation Under Caribbean Climate Conditions
SSRN Electronic Journal, 2022 A 23 factorial design was performed to analyze the performance of a mini-split air conditioning system under several psychrometric air conditions at the evaporator inlet, similar to Tropical Caribbean region conditions. In addition, a search for new energy-saving opportunities was performed.
Hermes Ramirez-Leon +4 more
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Inhomogeneous and Radiating Composite Fluids
Entropy, 2021 We consider the energy conditions for a dissipative matter distribution. The conditions can be expressed as a system of equations for the matter variables.
Byron P. Brassel +2 more
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On a Class of Harko-Kovacs-Lobo Wormholes
Universe, 2022 The Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat r0, and the other is a dimensionless deviation parameter γ with values ...
Ramis Kh. Karimov +2 more
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