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Spectral and Finite Difference Solutions of the Hyperbolic Heat Transport Equation for Thermoelectric Thin Films  [PDF]
Aldo Figueroa, Federico Vázquez
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.410A3004
Abstract:

This paper presents the numerical comparison in the solution of the hyperbolic transport Equation that models the heat flux in thermoelectric materials at nanometric length scales when the wave propagation of heat dominates the diffusive transport described by Fourier’s law. The widely used standard finite difference method fails in well-reproducing some of the physics presented in such systems at that length scale level. As an alternative, the spectral methods assure a well representation of wave behavior of heat given their spectral convergence.

Capítulo III: Estudio geográfico, histórico y económico
Elena Vázquez Vázquez
Investigaciones geográficas , 2003,
Abstract:
The Effect of Prices on Risk Aversion  [PDF]
Richard Watt, Francisco J. Vázquez
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.21007
Abstract: Traditionally, risk aversion (both absolute and relative) has been expressed as a function of wealth alone. The charac- teristics of risk aversion as wealth changes have been extensively studied. However, prices, as well as wealth, enter the indirect utility function, from which the typical risk aversion measures are calculated. Given that, changes in prices will affect risk aversion, although exactly how has not been considered in the literature. This paper provides such an analysis. In particular, we firstly remind the reader that both absolute and relative risk aversion are homogeneous functions, and as such independently of their particular slopes in wealth, there is a natural effect that holds relative risk aversion constant and decreases absolute risk aversion when prices and wealth are increased by a common factor. We also show that the size of relative risk aversion as compared to the number 1, which is of much importance to the comparative statics of the economics of risk and uncertainty, depends on how changes in prices affect marginal utility. Under plausible (and standard) theoretical assumptions we find that relative risk aversion is likely to be increasing, and that increases in prices will have a tempering effect on risk aversion.
The paradox of our outcomes, and the use of qualitative methodology as a way to understand the realities of emerging countries  [PDF]
María Sandín Vázquez
Open Journal of Nursing (OJN) , 2012, DOI: 10.4236/ojn.2012.23034
Abstract: It is a fact that global health indicators in vulnerable populations are not improving, despite all resources concentrated in this area. Therefore, as a teacher and researcher in an international doctorate in Public Health, I took advantage of the contact with health professionals from Colombia, Peru and Bolivia (they were all my students) to try to better understand which factors may be affecting this paradox from the perspective of the major actors and therefore through a qualitative methodology. The main conclusion is that the health goals for the target populations (emerging and developing countries) are not the same as the goals for the planners and administrators of public health budgets. So if we want to improve health outcomes, it is time to let talk the people involved, and to let the administrators listen.
Fuzzy Logic Programming in Action with FLOPER  [PDF]
Ginés Moreno, Carlos Vázquez
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.74028
Abstract:

During the last years, we have developed the FLOPER platform for providing a practical support to the so-called Multi-Adjoint Logic Programming approach (MALP in brief), which represents an extremely flexible framework into the Fuzzy Logic Programming arena. Nowadays, FLOPER is useful for compiling (to standard Prolog code), executing and debugging (by drawing execution trees) MALP programs, and it is ready for being extended in the near future with powerful transformation and optimization techniques designed in our research group during the recent past. Our last update consists in the integration of a graphical interface for a comfortable interaction with the system which allows, among other capabilities, the use of projects for packing scripts

Quasi non-Markovian Approach to the Study of Decoherence of a Controlled-Not Quantum Gate in a Chain of Few Nuclear Spins Quantum Computer  [PDF]
Pablo Carlos López Vázquez, Gustavo López Vázquez
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.39118
Abstract: We develop in the weak coupling approximation a quasi-non-Markovian master equation and study the phenomenon of decoherence during the operation of a controlled-not (CNOT) quantum gate in a quantum computer model formed by a linear chain of three nuclear spins system with second neighbor Ising interaction between them. We compare with the behavior of the Markovian counterpart for temperature different from zero (thermalization) and at zero temperature for low and high dissipation rates. At low dissipation there is a very small difference between Markovian and quasi no-Markovian at any temperature which is unlikely to be measured, and at high dissipation there is a difference which is likely to be measured at any temperature.
Una experiencia de investigación-acción del concepto ADN en el aula universitaria
José R. Vázquez Vázquez
Revista Umbral , 2010,
Abstract: El estudio cualitativo que se presenta es uno de naturaleza descriptiva, donde a partir de una experiencia de investigación-acción se abarcan los procesos de ense anza-aprendizaje en las Ciencias Biológicas, utilizando como ejemplo la molécula del ácido desoxirribonucleico (DNA). El estudio aborda dos dimensiones, la de estructura y de aplicaciones de la molécula. Como parte de esta experiencia se aprovecharon las ventajas que la tecnología moderna, en especial el uso de la computadora y la Internet, proporcionan. Los participantes de este estudio fueron estudiantes de una sección de un curso de Ciencias Biológicas a nivel de educación superior, cuya concentración no pertenece a las ciencias naturales. Mediante este estudio se obtuvo información que ayuda a cumplir con un primer propósito que consistió en explorar cómo la implantación de actividades nunca antes utilizadas con un grupo de estudiantes, mejoran el proceso de ense anza-aprendizaje. Un segundo propósito fue el observar la aplicabilidad de este método de investigación-acción dentro de los cursos de Ciencias Biológicas, así como los beneficios y limitaciones encontradas al momento de su utilización en el aula universitaria. Los datos se recopilaron mediante un ensayo reflexivo del estudiante, un diario reflexivo del profesor-investigador, conversaciones reflexivas individuales y grupales de los estudiantes. Los resultados obtenidos demuestran una marcada preferencia de los estudiantes por las actividades llevadas a cabo durante el estudio para la ense anza-aprendizaje del concepto ADN en comparación con aquellas actividades habituales utilizadas por el profesor-investigador. Las razones principales presentadas para esta preferencia incluyen el cambio de la rutina, la participación de la discusión en grupos peque os, la utilización de la Internet como fuente de información en vez del libro de texto y la interacción del profesor-investigador con los grupos, como un participante y un recurso adicional, en vez de ser la fuente principal de ense anza disponible. Algunas de las implicaciones que este estudio puede tener para el desarrollo curricular de las Ciencias Biológicas incluyen el utilizar la Internet como un recurso moderno y relativamente accesible para la ense anza-aprendizaje, el estimular el trabajo en equipo de estudiantes para facilitar el flujo de información y el crear conciencia a los profesores sobre la investigación-acción como un método útil y poderoso que pudieran a adir a su lista de herramientas educativas, no sólo para investigar, sino para buscar soluciones a los problemas p
Una salida territorial a la crisis: Lecciones de la experiencia latinoAméricana
VáZQUEZ BARQUERO,ANTONIO;
EURE (Santiago) , 2009, DOI: 10.4067/S0250-71612009000200001
Abstract: developed and emerging economies have been affected by the financial crisis, which has complicated the functioning of the real economy. consequently, the response has been to combine measures to recover confidence in the financial system and to strengthen bank credit and other mechanisms to improve productivity and competitiveness. the article argues that local development experiences in latin américa over recent decades reveal that local initiatives are useful for dealing with the problems of the crisis and economic recovery, since they lead to rising returns on investment and, as such, raise productivity and competitiveness of firms and territories.
Gran empresa y desarrollo endógeno: La convergencia estratégica de las empresas y territorios ante el desafío de la competencia
Vázquez Barquero,Antonio;
EURE (Santiago) , 1997, DOI: 10.4067/S0250-71611997007000001
Abstract: this article argues that globalization and increasing competition within markets promotes the convergence between spatial strategies of the most dynamic and innovative enterprises and the development strategies of regional and local governments. this process enhances the integration of the external units of big enterprises in the local productive systems and therefore, the endogenous development. although the convergence of strategies is not a phenomenon which can be generalized for all type of enterprises and territories, its occurrence facilitates the regional development and event the one happening in regions having growth and structural change problems
Introduced herbivores and the Allee effect in animal-pollinated plants
Vázquez,Diego P;
Ecolog?-a austral , 2007,
Abstract: interspecific interactions can be modulated by the community context in which they occur. in this paper i focus on plant-pollinator interactions and their modulation by introduced herbivores through changes in plant population density. i first develop a mathematical model that relates the population density of an animal-pollinated plant species with pollinator visitation frequency, pollination, reproduction and per capita growth rate. this model allows me to investigate how several pollination-related parameters -including relative abundance of the focal plant species, pollinator specialization, pollination quantity and quality and pollen limitation of reproduction- influence the relationship between per capita growth rate and population density. i then use this theoretical framework to discuss two case studies that have addressed the density-mediated effects of introduced herbivores on plant reproduction. this exercise allows me to point out several limitations of previous studies and to suggest avenues for future research.
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