9,230 research outputs found

    Bringing the Social Back into Economies: Progress or Reductionism?.

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    Section 2 of this paper suggests that economics has long sought to colonise other social sciences. It has, however, only achived limites success because of its alien methods and its need to take the social as given. Section 3 argues that there is now a newer version of economic imperialism drawing upon the new microfoundation principles associated with information imperfections. In view of rational response to market imperfections, these purport to be able to explain the social whether the latter be non-economic or collective forms of behaviour. Section 4 presents illustrations of the way in which imperialism is bringing the social back into its analysis, drawing in broad brush rather than detail upon the new economic sociology, the new institutional economics, the new economic history, the new development economics, and the all-embracing notion of social capital.SOCIETY ; SOCIALISM ; ECONOMIC THEORY

    Equilibrium entanglement vanishes at finite temperature

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    We show that the equilibrium entanglement of a bipartite system having a finite number of quantum states vanishes at finite temperature, for arbitrary interactions between its constituents and with the environment.Comment: 2 pages, no figures, first submitted on July 22, 200

    Kinetic Parameters for the Hydrogen and Ethylene Flames from Flashback Measurements

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    Values for the flame activation energy and an overall reaction order have been obtained for premixed hydrogen-oxygen and ethylene-oxygen flames with nitrogen and with argon as diluents; the values come from measurements of the change with pressure and flame temperature of the critical boundary velocity gradient for flashback. Measurements have been made for rich and stoichiometric hydrogen flames and for lean and stoichiometric ethylene flames. For hydrogen flames with nitrogen diluent an overall order of 2*3 is found; for ethylene flames with nitrogen diluent, the order obtained is 1*8. With argon diluent, values for the order are about 10 per cent lower for each flame. With nitrogen diluent the flame activation energy apparently increases with flame temperature; this increase is not found with argon diluent. For hydrocarbon flames the assumption that the initial equivalence ratio equals the effective equivalence ratio in the flame leads to an order of reaction with respect to oxygen that is considerably larger than unity. For hydrogen flames, that assumption is consistent with an oxygen order of unity

    Dimensionality of spin modulations in 1/8-doped lanthanum cuprates from the perspective of NQR and muSR experiments

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    We investigate the dimensionality of inhomogeneous spin modulation patterns in the cuprate family of high-temperature superconductors with particular focus on 1/8-doped lanthanum cuprates. We compare one-dimensional stripe modulation pattern with two-dimensional checkerboard of spin vortices in the context of nuclear quadrupole resonance(NQR) and muon spin rotation(muSR) experiments. In addition, we also consider the third pattern, a two-dimensional superposition of spin spirals. Overall, we have found that none of the above patterns leads to a consistent interpretation of the two types of experiments considered. This, in particular, implies that the spin vortex checkerboard cannot be ruled out on the basis of available NQR/muSR experimental results.Comment: 6 pages, 2 figure

    Comparison of Temperatures of Flames on Porous Burners

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