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Specific CI calculation of energy differences: Transition energies and bond energies
Chemical Physics, 1993Abstract A general strategy for the calculation of energy differences is proposed. It proceeds through the definition of a minimal model space and the low-order perturbative development of the corresponding Hamiltonian is used to establish a set of determinants contributing to the searched energy difference.
Josefa Miralles +3 more
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Specific heat of random fractal energy spectra
Physical Review E, 2006The specific heat corresponding to systems with deterministic fractal energy spectra is known to present logarithmic-periodic oscillations as a function of the temperature T in the low T region around a mean value given by a characteristic dimension of the energy spectrum.
Ana V, Coronado, Pedro, Carpena
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Energy Efficiency in Pump Specification
World Pumps, 2001Abstract Before setting out to improve energy efficiency it is a good idea to remind yourself about one of Newton's laws — namely, that energy can neither ...
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The Measurement and Specification of Radiant Energy
Radiology, 1929NO one who uses radiant energy, solar or artificial, for therapeutic or experimental purposes will question the necessity of measuring and specifying it. Personally we feel that the specifications should be in absolute units, the erg or the calorie, and since the methods permitting this are no more difficult than those giving results expressible only ...
Henry Laurens, H. S. Mayerson
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On discontinuities in the energy and the specific heat
Physica, 1934Summary The transition of a substance from one structure into another is considered as a process of association. Equilibrium conditions for an associating system are derived (II). It is shown that the “degree of association” increases with decreasing temperature; the two possibilities are: a ) this process is continuous, if the larger associated ...
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Specific entropy and the sign of the energy
Physical Review D, 1982The second law in the context of black holes restricts the specific entropy of an arbitrary system of given size; this limitation cannot be avoided by appealing to the buoyant effects of black-hole radiation. Quantum statistics sets a similar bound for field systems with positive ground energies.
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Thermal Vibrations and Specific Energies
1991This chapter deals with input data necessary for simulations. The positions of the atoms in the crystal structure of a target are not fixed, because of lattice vibrations. The temperature-dependent excursions from the lattice sites have to be determined. The theoretical background of lattice vibrations is discussed in [6.1].
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Specification of System of Systems for Policymaking in The Energy Sector
2006 IEEE/SMC International Conference on System of Systems Engineering, 2006Very detailed models often hinder the ability to develop a broad, highlevel understanding of system behavior. A system-of-systems perspective combined with a policy analysis approach oers an alternative approach for policy decision-making. This paper specifies the elements of the energy system-of-systems using this new approach and illustrates its use ...
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