3,488 research outputs found

    Equivalence of Darmois-Israel and Distributional-Methods for Thin Shells in General Relativity

    Get PDF
    A distributional method to solve the Einstein's field equations for thin shells is formulated. The familiar field equations and jump conditions of Darmois-Israel formalism are derived. A carefull analysis of the Bianchi identities shows that, for cases under consideration, they make sense as distributions and lead to jump conditions of Darmois-Israel formalism.Comment: 17 pages Latex, no figures, to be published in Journ. Math. Phy

    The Structure of AdS Black Holes and Chern Simons Theory in 2+1 Dimensions

    Full text link
    We study anti-de Sitter black holes in 2+1 dimensions in terms of Chern Simons gauge theory of anti-de Sitter group coupled to a source. Taking the source to be an anti-de Sitter state specified by its Casimir invariants, we show how all the relevant features of the black hole are accounted for. The requirement that the source be a unitary representation leads to a discrete tower of states which provide a microscopic model for the black hole.Comment: 17 pages, LaTex. The presentation in Section 5 was improved; other minor improvements. Final form of the manuscrip

    Pedestrian route taking behaviour at night and street lighting: A pilot study

    Get PDF

    E-Learning for Teachers and Trainers : Innovative Practices, Skills and Competences

    Get PDF
    Reproduction is authorised provided the source is acknowledged.Final Published versio
    • …
    corecore