Results 211 to 220 of about 207,854 (262)
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Energy fluxes and their relations within energy plants
Energy Conversion and Management, 2007Analysing how energy is delivered from its primary sources to final users, it may be seen that the evolution of technology, driven by economic considerations, has mainly rewarded those systems that have intense energy fluxes through their main sections.
GRAZZINI, GIUSEPPE, MILAZZO, ADRIANO
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International Journal of Modern Physics D, 1995
The total energy in a sphere containing an isotropic shear-free conducting heat fluid is studied in the frame of a spherically symmetric metric. Firstly, we examine the role played by the heat flux. Secondly, we point out the contribution to the energy by the Weyl tensor.
J. GARIEL, N.O. SANTOS, G. LE DENMAT
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The total energy in a sphere containing an isotropic shear-free conducting heat fluid is studied in the frame of a spherically symmetric metric. Firstly, we examine the role played by the heat flux. Secondly, we point out the contribution to the energy by the Weyl tensor.
J. GARIEL, N.O. SANTOS, G. LE DENMAT
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Energy Requirements and Energy Flux
1997The energy yield and nutritive value of food is a function of its composition and digestibility. The chemical energy content, or gross energy, of food (Table 7.1) is equivalent to the heat produced on combustion of its total organic matter. It is expressed in joules; 4.184 joules (1 calorie) is the amount of heat required to raise the temperature of lg
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Intuitive and Counterintuitive Energy Flux
Archive for Rational Mechanics and Analysis, 2004The author considers the estimation of flux and absolute flux of energy across hypersurfaces for regular solutions to heat, wave and Schrödinger equations in \(\mathbb{R}_t \times \mathbb{R}^{d}_x\), \(d \geq 1\). The main result is that the absolute flux of energy across hypersurfaces is as large as one wants compared to the total energy.
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Macroscopic detection of negative-energy fluxes
Physical Review D, 1992We study the response of an array of quantum-mechanical spin-1/2 particles in a classical background magnetic field to quantum fluctuations of the electromagnetic field. We show that there is a depolarization of the spins due to these fluctuations in that the magnetic moment of the system is reduced by the vacuum fluctuations. We further show that this
, Ford, , Grove, , Ottewill
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Constraints on negative-energy fluxes
Physical Review D, 1991Locally negative energy due to quantum coherence effects in quantum field theory is discussed. In a previous work, it was argued that a beam carrying negative energy must satisfy an uncertainty-principle-type inequality of the form \ensuremath{\Vert}\ensuremath{\Delta}E\ensuremath{\Vert}\ensuremath{\Delta}t\ensuremath{\le}1, where \ensuremath{\Vert ...
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Energy Flux Manipulation in Upconversion Nanosystems
Accounts of Chemical Research, 2018Lanthanide-doped upconversion nanoparticles (UCNPs) exhibit unique optical characteristics, including a large anti-Stokes shift, a long luminescence lifetime, sharp emission bands, and high photostability. These virtues make UCNPs highly useful in many emerging applications such as biolabeling, security, multicolor displays, and optogenetics.
Liangliang Liang +3 more
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Neutron Flux and Energy Measurements
Physics in Medicine & Biology, 1966The problem of neutron energy measurement is considered in the energy ranges, thermal ( 15 MeV), together with the general problem of neutron flux measurement. Sensitivities and resolutions obtainable are given for a variety of methods. It is concluded that for thermal and intermediate energy measurements in radiological applications it is best to use
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2014
As we already know, the total energy in the universe is conserved. Let us now focus our attention on the transfer of energy as heat (thermal energy) across system boundaries, with the clarity that the thermal energy, a form of energy, is not conserved.
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As we already know, the total energy in the universe is conserved. Let us now focus our attention on the transfer of energy as heat (thermal energy) across system boundaries, with the clarity that the thermal energy, a form of energy, is not conserved.
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ELECTROMAGNETIC ENERGY DENSITY AND FLUX
Canadian Journal of Physics, 1952Although Poynting's theorem receives general acceptance in the treatment of electromagnetic energy, an alternative theorem, Macdonald's, has equal claim to validity at the present state of our knowledge. In a comparison of many results derived from the two, Macdonald's theorem exhibits sufficient superiority to warrant its consideration more generally
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