886 resultados para Difference-in-Difference
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Mode of access: Internet.
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Bibliography: p. 32-34.
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Title page and half-title not included in paging.
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"For the use of beginners in the study of the Latin Language."--T.p.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Armorial book-plate mounted on verse of t.-p.
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Mode of access: Internet.
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Includes bibliographical references (p. 19-20).
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Mode of access: Internet.
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"B-247327."
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"PM 400-4D."
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Incommensurate lattice fluctuations are present in the beta(L) phase (T-c similar to 1.5 K) of ET2I3 (where ET is BEDT-TTF - bis(ethylenedithio)tetrathiafulvalene) but are absent in the beta(H) phase (T-c similar to 7 K). We propose that the disorder in the conformational degrees of freedom of the terminal ethylene groups of the ET molecules, which is required to stabilise the lattice fluctuations, increases the quasiparticle scattering rate and that this leads to the observed difference in the Superconducting critical temperatures, T-c, of the two phases. We calculate the dependence of T-c on the interlayer residual resistivity. Our theory has no free parameters. Our predictions are shown to be consistent with experiment. We describe experiments to conclusively test our hypothesis.