The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 1

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 2

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 3

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 4

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 5

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 6

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 7

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 8

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists /edited by George Nicholson ; assisted by J.W.H. Trail ... and J. Garrett ...

v. 9

The last of the Arctic voyages; being a narrative of the expedition in H. M. S. Assistance, under the command of Captian Sir Edward Belcher, C. B., in search of Sir John Franklin, during the years 1852-53-54. With notes on the natural history, by Sir John Richardson, Professor Owen, Thomas Bell, J. W. Salter and Lovell Reeve.

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The last of the Arctic voyages; being a narrative of the expedition in H. M. S. Assistance, under the command of Captian Sir Edward Belcher, C. B., in search of Sir John Franklin, during the years 1852-53-54. With notes on the natural history, by Sir John Richardson, Professor Owen, Thomas Bell, J. W. Salter and Lovell Reeve.

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Para uma Dialéctica Constelar: Theodor W. Adorno à entrada do Século XXI1

RESUMO: Interrogando-se sobre o lugar da filosofia de Theodor W. Adorno no âmbito do pensamento crítico contemporâneo, o presente artigo procura dar conta dos revezes da recepção político-filosófica da dialéctica negativa (das posturas críticas de Habermas, Lyotard ou Agamben às mais favoráveis de Jameson e Holloway) e discutir a sua relevância actual. Defender-se-á que a politização do pensamento adorniano é possível, muito embora as suas valências críticas não se restrinjam a essa possibilidade. Hoje, a dialéctica negativa funcionaria também como antídoto contra os atalhos tomados pelas correntes "voluntarista" (Peter Hallward), "messiânica" (Agamben) e "ontológica" (realismo especulativo) da filosofia, à entrada do século XXI. Contudo, atendendo a que a relação entre teoria e prática é complexa em Adorno, a sua relevância actual ressaltaria em relação com as reacções críticas que o movimento do "realismo especulativo" tem suscitado. Em diálogo com alguns dos seus interlocutores (Markus Gabriel e Adrian Johnston), sugere-se que o desenvolvimento de uma "dialéctica constelar" depende da introdução de um elemento destotalizador no seio do diagnóstico radical - a um só tempo materialista e transcendental - da dialéctica negativa.

Calculation of the optical conductivity for the Anderson impurity model using the slave boson technique

The optical conductivity of the Anderson impurity mode l has been calculated by emp l oying the slave boson technique and an expansion in powers of l i N, where N is the d egeneracy o f the f electron level . This method has been used to find the effective mass of the conduction electrons for temperatures above and below the Kondo tempera ture. For low temperatures, the mass enhancement is f ound to be large while a t high t emperatures, the mass enhancement is sma ll. The conductivity i s f ound to be Drude like with frequency dependent effective mass and scattering time for low independent effective mass and temperatures and scattering time f requency for high t emperatures. The behavior of both the effective mass and the conductivity is in qualitative agreement with experimental r esul t s .