Simplified computational routine to correct the modal decoupling in transmission lines and power systems modelling

Modal analysis is widely approached in the classic theory of power systems modelling. This technique is also applied to model multiconductor transmission lines and their self and mutual electrical parameters. However, this methodology has some particularities and inaccuracies for specific applications, which are not clearly described in the technical literature. This study provides a brief review on modal decoupling applied in transmission line digital models and thereafter a novel and simplified computational routine is proposed to overcome the possible errors embedded by the modal decoupling in the simulation/ modelling computational algorithm. © The Institution of Engineering and Technology 2013.

Proposal for a code of good practice in statistics in Latin America and the Caribbean and implementation plan for 2012-2013

Incluye Bibliografía

Report of the Working Group on Gender Statistics of the Statistical Conference of the Americas of the Economic Commission for Latin America and the Caribbean

Incluye Bibliografía

Report of the working group on environmental statistics of the Statistical Conference of the Americas of the Economic Commission for Latin America and the Caribbean

Includes bibliography

Las mujeres y el cambio demográfico: estadísticas e indicadores = Women and demographic change: statistics and indicators

Analiza a traves del examen de las estadisticas e indicadores existentes, los cambios demograficos mas relevantes para el conocimiento de la situacion de la mujer que han tenido lugar durante el periodo 1950-1980.

Agricultural statistics of the Caribbean countries

Includes bibliography

Informe final de la Reunión de Directores de Estadística de las Américas = Report of the Meeting of Directors of Statistics of the Americas

Presenta la organizacion de los trabajos y resumen de los debates de la reunion, en la que se analizaron aspectos globales de los Censos de Poblacion y Vivienda que requieren decisiones a nivel de Directores de Estadistica; la participacion de los paises latinoamericanos y del Caribe en el 24o periodo de sesiones de la Comision de Estadistica de las Naciones Unidas; y se evaluaron las actividades acordadas en la 9a Conferencia Interamericana de Estadistica.

Escape beam statistics and dynamical properties for a periodically corrugated waveguide

Some escape and dynamical properties for a beam of light inside a corrugated waveguide are discussed by using Fresnel reflectance. The system is described by a mapping and is controlled by a parameter δ defining a transition from integrability (δ = 0) to non integrability (δ ≠ 0). The phase space is mixed containing periodic islands, chaotic seas and invariant tori. The histogram of escaping orbits is shown to be scaling invariant with respect to δ. The waveguide is immersed in a region with different refractive index. Different optical materials are used to overcame the results. © 2013 Elsevier B.V. All rights reserved.

On computational aspects of discrete Sobolev inner products on the unit circle

In this paper, we show how to compute in O(n2) steps the Fourier coefficients associated with the Gelfand-Levitan approach for discrete Sobolev orthogonal polynomials on the unit circle when the support of the discrete component involving derivatives is located outside the closed unit disk. As a consequence, we deduce the outer relative asymptotics of these polynomials in terms of those associated with the original orthogonality measure. Moreover, we show how to recover the discrete part of our Sobolev inner product. © 2013 Elsevier Inc. All rights reserved.