Results 321 to 330 of about 14,264,069 (377)
Some of the next articles are maybe not open access.

Wave-number dependence of the static screening function of an interacting electron gas. II. Higher-order exchange and correlation effects

, 1970
An interpolation formula is suggested for the wave-number and density dependence of the static screening function for an interacting electron gas in its ground state.
D. Geldart, Roger H. Taylor
semanticscholar   +1 more source

Exact evaluation of the second-order exchange energy of a two-dimensional electron fluid

, 1980
A new rigorous method is presented for the evaluation of the second-order exchange energy of a two-dimensional electron fluid. The resulting energy 0.2287 Ry is significant in the correlation energy, in contrast to the three-dimensional case. The present
A. Isihara, L. Ioriatti
semanticscholar   +1 more source

On the nonadditivity of the second‐order exchange‐dispersion energy in the interaction of three helium atoms

, 1987
Explicit formulas for the nonadditivity of the exchange‐dispersion energy in the interaction of three closed‐shell systems are derived under the assumption that the electron correlation within the noninteracting systems is neglected. The idea of applying
M. Bulski, G. Chal, asiński
semanticscholar   +1 more source

Effect of second-order exchange in electron-hydrogen scattering.

Physical Review Letters, 1990
The electron-hydrogen scattering problem has been a nemesis to theoretical atomic physicists due to the fact that even the most sophisticated of theoretical calculations, both perturbative and nonperturbative, do not agree with experiment.
Madison, Bray, Mccarthy
semanticscholar   +1 more source

Exact second-order distorted-wave calculation for hydrogen including second-order exchange

, 1991
Over the years there have been many theoretical studies of the electron-hydrogen-atom scattering problem including some recent highly sophisticated works.
D. Madison, I. Bray, I. McCarthy
semanticscholar   +1 more source

The Curie temperature of the Ising ferromagnet with higher-order exchange interaction

, 1984
The effects of the higher-order exchange interactions of the type (Si.Sj)2 and (Si.Sj)(Sj.Sk) on the Curie temperature of the two-dimensional quadratic Ising ferromagnetic of spin one have been investigated with use of the Bethe-Peierls method.
T. Iwashita, N. Uryǔ
semanticscholar   +1 more source

Second-order exchange effects in intermolecular interactions. The water dimer

, 1990
A new method of deriving explicit formulas for the calculation of second‐order exchange contributions (induction as well as dispersion) within the framework of symmetry‐adapted perturbation theories is presented.
O. Hess   +3 more
semanticscholar   +1 more source

Chaos and order in exchange rates

International Journal of Monetary Economics and Finance, 2009
This paper asks what accounts for differing levels of exchange rate variance among countries over time. It suggests that the type of political system (i.e., number of policy veto players) is a determinant of policy outcomes in foreign exchange markets. If exchange rate decisions are made by larger groups of actors, we are more likely to witness greater
openaire   +2 more sources

Deuterium NMR Study of the Glassy Crystal Pentachlorotoluene. Hadamard Quadrupole-Order Exchange NMR

, 1996
Pentachloro[α,α‘,α‘‘-2H3]toluene was studied by deuterium nuclear magnetic resonance (NMR) experiments. Three doublets were observed below 230 K, while a single doublet was observed above 300 K in a single crystal with its long axis perpendicular to the ...
A. Kubo, A. Yogo, F. Imashiro, T. Terao
semanticscholar   +1 more source

Order Flow and Exchange Rate Dynamics in Brazil [PDF]

open access: possibleSSRN Electronic Journal, 2004
The paper presents results of empirical tests with hybrid nominal exchange rate models for the Brazilian foreign exchange market, using macroeconomic and market microstructure variables. The basic model was originally proposed and tested in the German (DM/US$) and the Japanese (Y/US$) foreign exchange markets by Evans and Lyons (2002).
de Medeiros, Otavio Ribeiro
openaire   +2 more sources

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