Saddle points and rare collisions under scaling approach in a Fermi accelerator with two nonlinear terms

Rare collisions of a classical particle bouncing between two walls are studied. The dynamics is described by a two-dimensional, nonlinear and area-preserving mapping in the variables velocity and time at the instant that the particle collides with the moving wall. The phase space is of mixed type preventing diffusion of the particle to high energy. Successive and therefore rare collisions are shown to have a histogram of frequency which is scaling invariant with respect to the control parameters. The saddle fixed points are studied and shown to be scaling invariant with respect to the control parameters too. © 2012 Elsevier B.V. All rights reserved.

Braneworlds scenarios in a gravity model with higher order spatial three-curvature terms

In this work we study a Hořava-like 5-dimensional model in the context of braneworld theory. The equations of motion of such model are obtained and, within the realm of warped geometry, we show that the model is consistent if and only if λ takes its relativistic value 1. Furthermore, we show that the elimination of problematic terms involving the warp factor second order derivatives are eliminated by imposing detailed balance condition in the bulk. Afterwards, Israel's junction conditions are computed, allowing the attainment of an effective Lagrangian in the visible brane. In particular, we show that the resultant effective Lagrangian in the brane corresponds to a (3 + 1)-dimensional Hořava-like model with an emergent positive cosmological constant but without detailed balance condition. Now, restoration of detailed balance condition, at this time imposed over the brane, plays an interesting role by fitting accordingly the sign of the arbitrary constant β, insuring a positive brane tension and a real energy for the graviton within its dispersion relation. Also, the brane consistency equations are obtained and, as a result, the model admits positive brane tensions in the compactification scheme if, and only if, β is negative and the detailed balance condition is imposed. © 2013 Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica.

Terms of reference and rules of procedure of the Economic Commission for Latin America and the Caribbean

Presenta las atribuciones y reglamentos de la Comisión en cuanto a las reuniones, la Secretaría, las votaciones, los idiomas, los informes, etc.

Enmiendas al texto de las atribuciones y reglamento de la CEPAL = Amendments to the text of the terms of reference and rules of procedure of ECLAC = Amendements au texte du mandat et règlement intérieur de la CEPALC

Somete a consideracion de las delegaciones las enmiendas propuestas al texto de las atribuciones de CEPAL, documento E/CN.12/850/Rev.1.

Términos económicos y sociales de la Lista Común de Descriptores de la OCDE y su traducción al español = Economic and social terms in the OECD Aligned List of Descriptors and their translation into Spanish

Incluye Bibliografía

Términos de referencia para la elaboración de un estudo sobre costos, mercado y sistema de transmisión para el Proyecto Regional de Interconexión Eléctrica del Istmo Centroamericano = Terms of reference for the preparation of a study on costs, market and transmission systems for the Regional Electric Interconnection Project of the Central American Isthmus

Incluye Bibliografía

Atribuciones y reglamento de la Comisión Económica para América Latina y el Caribe = Terms of reference and rules of procedure of the Economic Commission for Latin America and the Caribbean = Mandat et règlement intérieur de la Commission Economique pour l'Amérique latine et les Caraïbes

Presenta las atribuciones y reglamentos de la Comisión en cuanto a las reuniones, la Secretaría, las votaciones, los idiomas, los informes, etc.

La relación de intercambio de los productos primarios de América Latina y el Caribe = Terms of trade of primary commodities in Latin America and the Caribbean

Incluye Bibliografía

Terms of trade and output fluctuations in Colombia

Includes bibliography.