Search results for "America"

Institutions, crises, and political confidence in seven contemporary democracies. An elite-mass analysis

2017

There is ample consensus in the literature that institutional confidence by the public is needed in democracies and at the same time elites, particularly political elites, need to share this confidence in their guidance of state institutions, if political stability in established democracies and the consolidation of new democracies are desired. The research takes the form of a quantitative analysis based on the World Values Surveys and the elite surveys (parliamentarians) conducted in 2006 (before the financial crisis) and in 2012–2013 (post the crisis when apparently, the worst of the economic crunch had lessened up) in the 7 countries selected. We explore what lies at the base of politica…

American cockroach control assays in the municipal sewerage system of Valencia (Spain)

2013

ABSTRACT Several insecticides (including different active substances and formulations) were applied to sewer shafts to control Periplaneta americana (LINNAEUS, 1758) populations in Valencia (eastern Spain). Results show that the best products for cockroach control were the paints (with and without insecticide), which provided an optimal reduction of P. americana populations for up to three months (P < 0.001). Therefore, it is important to note that the reduction of cockroach populations as well as the persistence of the insecticide effect in sewers was similar in both types of paints. A product combining two pyrethroids (Tetramethrin and Alfacipermetrin) and piperonyl butoxide also gave …

Abundance and Distribution Patterns of Thunnus albacares in Isla del Coco National Park through Predictive Habitat Suitability Models

2016

Information on the distribution and habitat preferences of ecologically and commercially important species is essential for their management and protection. This is especially important as climate change, pollution, and overfishing change the structure and functioning of pelagic ecosystems. In this study, we used Bayesian hierarchical spatial-temporal models to map the Essential Fish Habitats of the Yellowfin tuna (Thunnus albacares) in the waters around Isla del Coco National Park, Pacific Costa Rica, based on independent underwater observations from 1993 to 2013. We assessed if observed changes in the distribution and abundance of this species are related with habitat characteristics, fis…

La universidad colonial hispanoamericana (1538-1810) : bibliografía crítica, metodología y estado de la cuestión. El Río de la Plata

1994

Ponencia en las Actas de las VI Jornadas sobre la presencia universitaria española en América. Alcalá de Henares, 26 y 27 de Noviembre de 1992.

La aparición del debate postcolonial en América Latina: posiciones, contradicciones y problemas

2010

La aparición de la cuestión postcolonial en los estudios latinoamericanos durante la década de los noventa mostró algunas de las limitaciones del debate sobre la condición postcolonial cuando se aplicaba a contextos históricos diferentes a aquellos en los que había nacido. En las últimas décadas, conceptos como subalternidad, postoccidentalismo o pensamiento fronterizo han sido reconceptualizados para superar dichas limitaciones. En este artículo se trata de detectar las contradicciones y problemas fundamentales de esas aproximaciones.

Bush, camino del Nobel

2003

El desarrollo de los instrumentos de proteccion de los derechos de las mujeres en los sistemas regionales de derechos humanos. B. Sistema interameric…

2015

El artículo analiza los instrumentos de protección de los derechos de las mujeres en el marco del Sistema interamericano de derechos humanos y la actividad de la Organización de los Estados Americanos sobre igualdad de género, con especial atención a la labor de la Comisión Interamericana de Mujeres y a la Relatoría sobre los Derechos de las Mujeres.

The Global Research Collaboration of Network Meta-Analysis: A Social Network Analysis

2016

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Reduced Order Models for Pricing European and American Options under Stochastic Volatility and Jump-Diffusion Models

2016

European options can be priced by solving parabolic partial(-integro) differential equations under stochastic volatility and jump-diffusion models like the Heston, Merton, and Bates models. American option prices can be obtained by solving linear complementary problems (LCPs) with the same operators. A finite difference discretization leads to a so-called full order model (FOM). Reduced order models (ROMs) are derived employing proper orthogonal decomposition (POD). The early exercise constraint of American options is enforced by a penalty on subset of grid points. The presented numerical experiments demonstrate that pricing with ROMs can be orders of magnitude faster within a given model p…

Services supérieurs et recomposition urbaine

2000

Since the 1980s, we have observed an increasing tendency o f specialized services like producer services to leave their « natural habitat » in the center o f large met ropolitan areas in order to re loc at e in suburban zones. This phenomenon is particularly apparen t in North American citi es and seems to be occurring around certain French cities too. This paperinvestigates the forms taken by this new trend, and the reasons behind it. Taking economic geography and economics of cities as our theoretical basis, we first describe the main forces deter mining the agglomeration o f producer services and their preference for certain big cities. Agglomeration factors are to be looked for not only…