6 research outputs found
AnĂĄlisis, construcciĂłn, simulaciĂłn y sincronizaciĂłn de circuitos electrĂłnicos prototipos de Caos
El proyecto tiene como objetivo el estudio de siete Sistemas DinĂĄmicos, yendo de los que son paradigma de Caos a los mĂĄs complejos, y sus posibles aplicaciones en comunicaciones privadas, bioingenierĂa y comunicaciones Ăłpticas. El conjunto de sistemas seleccionados incluye algunos ejemplos paradigmĂĄticos de DinĂĄmicas CaĂłticas, asĂ como nuevas propuestas, tanto de do sistemas bĂĄsicos como de un sistema que tiene soluciones mĂĄs complejas, nunca antes estudiados. Se lograrĂĄ, de esta manera, realizar un completo recorrido desde los osciladores no-lineales mĂĄs simples (como el de Van Der Pol), hasta los sistemas de mayor complejidad (como son las dinĂĄmicas hipercaĂłticas).
El estudio consiste, en primer lugar, en identificar los mĂŠtodos de anĂĄlisis especĂficos del Caos, que permiten poner de manifiesto su carĂĄcter y propiedades (a lo que se dedicarĂĄ el capĂtulo 1). Tras ello (CapĂtulo 2 y 3), se desarrollan, estudian y analizan los sistemas mediante simulaciones numĂŠricas de la dinĂĄmica de los citados sistemas utilizando el software matemĂĄtico MATLAB.
En una segunda parte (que abarca la primera mitad del CapĂtulo 4), se implementan los circuitos electrĂłnicos de los citados sistemas, y se simula su comportamiento mediante un software profesional.
En una tercera parte (coincidente con la segunda mitad del CapĂtulo 4 y el CapĂtulo 5 completo), se construyen fĂsicamente los sistemas fundamentales y sus extensiones, con el objetivo de caracterizar su comportamiento. AdemĂĄs, se desarrolla una aplicaciĂłn software con entorno grĂĄfico para el anĂĄlisis sistemĂĄtico de las dinĂĄmicas objeto de estudio.
Finalmente, y con el objetivo de aplicar los Sistemas DinĂĄmicos caĂłticos tanto a Comunicaciones Seguras como a BioingenierĂa, este proyecto presenta un estudio de los citados sistemas para su uso en Comunicaciones Seguras, en el capĂtulo 6. Por otro lado, el oscilador de Van Der Pol no sĂłlo es un sistema paradigma de Caos por la riqueza de su dinĂĄmica caĂłtica, sino tambiĂŠn por su interĂŠs en la simulaciĂłn del corazĂłn humano tanto en rĂŠgimen regular, como en rĂŠgimen caĂłtico. Este anĂĄlisis se desarrolla en el CapĂtulo 3
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The impact of corporate environmental responsibility on financial performance: perspective from the multinational extractive sector
This thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel UniversityThe research into the relationship between social-environmental responsibility and financial performance continues to draw the attention of both scholars and practitioners. This is because previous studies have not presented an unequivocal outcome as to the direction of causation between the two constructs. To address this obvious gap, this study explores the relationship between corporate environmental responsibility and financial performance with a focus on the extractive sector where previous studies least investigated empirically and one of the worst culprits in environmental degradation.
The study explores the impact of corporate environmental responsibility on the financial performance in the extractive sector using a pooled secondary data of 101 multinational extractive companies for the period of 2008-2010 and primary data from a survey of 275 extractive sector managers. The results of this study show that there is no relationship between corporate environmental responsibility and financial performance while the environmental attitude of managers is positively related to the perceived corporate reputation of their companies.
A further investigation shows that sector unique characteristics are responsible for the neutral relationship between corporate environmental responsibility and financial performance. However, some results show statistically insignificant positive relation and this points to the fact that in the long-term, poor sensitivity to the environment may not be sustainable
MS FT-2-2 7 Orthogonal polynomials and quadrature: Theory, computation, and applications
Quadrature rules find many applications in science and engineering. Their analysis is a classical area of applied mathematics and continues to attract considerable attention. This seminar brings together speakers with expertise in a large variety of quadrature rules. It is the aim of the seminar to provide an overview of recent developments in the analysis of quadrature rules. The computation of error estimates and novel applications also are described
Generalized averaged Gaussian quadrature and applications
A simple numerical method for constructing the optimal generalized averaged Gaussian quadrature formulas will be presented. These formulas exist in many cases in which real positive GaussKronrod formulas do not exist, and can be used as an adequate alternative in order to estimate the error of a Gaussian rule. We also investigate the conditions under which the optimal averaged Gaussian quadrature formulas and their truncated variants are internal