41,749 research outputs found

    Book review: Dorothy L Hodgson: Being Maasai, becoming indigenous: Postcolonial politics in a neoliberal world

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    Copyright @ 2012 Cambridge University Press

    C*-algebras of tilings with infinite rotational symmetry

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    A tiling with infinite rotational symmetry, such as the Conway-Radin Pinwheel Tiling, gives rise to a topological dynamical system to which an \'etale equivalence relation is associated. A groupoid C*-algebra for a tiling is produced and a separating dense set is exhibited in the C*-algebra which encodes the structure of the topological dynamical system. In the case of a substitution tiling, natural subsets of this separating dense set are used to define an AT-subalgebra of the C*-algebra. Finally our results are applied to the Pinwheel Tiling

    Parametric Processes in a Strong-Coupling Planar Microcavity

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    I present a theoretical treatment of parametric scattering in strong coupling semiconductor microcavities to model experiments in which parametric oscillator behaviour has been observed. The model consists of a non-linear excitonic oscillator coupled to a cavity mode which is driven by the external fields, and predicts the output power, below threshold gain and spectral blue shifts of the parametric oscillator. The predictions are found to be in excellent agreement with the experimental data.Comment: 4 pages, LaTex, Revte

    The Davis-Bacon Act : Issues and Legislation During the 108th Congress

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    CRS_March_2004_Davis_Bacon_Act_108th.pdf: 2423 downloads, before Oct. 1, 2020
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