A cooperação entre Argentina e Brasil no setor de defesa: visão e ação da Argentina (1983-2008)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Modelo AC para el despacho combinado de contratos bilaterales y bolsa de energía considerando restricciones de seguridad

Reliability is a key aspect in power system design and planning. Maintaining a reliable power system is a very important issue for their design and operation. Under the new competitive framework of the electricity sector, power systems find ever more and more strained to operate near their limits. Under this new scenario, it is crucial for the system operator to use tools that facilitate an energy dispatch that minimizes possible power cuts. This paper presents a mathematical model to calculate an energy dispatch that considers security constraints (single contingencies in transmission lines and transformers). The model involves pool markets and fixed bilateral contracts. Traditional methodologies that include security constraints are usually based in multistage dispatch processes. In this case, we propose a single-stage model that avoids the economic inefficiencies which result when conventional multi-stage dispatch approaches are applied. The proposed model includes an AC representation of the transport system and allows calculating the cost overruns incurred in due to reliability restrictions. We found that complying with fixed bilateral contracts, when they go above certain levels, might lead to congestion problems in transmission lines.

Ejes estratégicos de la seguridad hemisférica en los gobiernos de George W. Bush y Barack Obama

The paper approaches the U.S. perceptions about the sources of insecurity from Latin America, considered a low risk area and priority of its foreign policy. El análisis se concentra en la evaluación de las amenazas y desafíos a sus intereses estratégicos y las modalidades de actuación privilegiadas en la esfera regional, en que se verifican coincidencias entre las administraciones Demócratas y Republicanas en la adopción de un liderazgo con prerrogativas clasificatorias sobre los tipos de régimen político, con una agenda concebida como promoción de la convergencia hemisférica de democracias y economías liberales. The analysis focuses on assessing the threats and challenges to its strategic interests and privileged modes of action at the regional level, which verifies similarities between Republican and Democratic administrations in taking a leadership prerogatives qualifiers on the types political regime, with an agenda designed as promoting hemispheric convergence of liberal democracies and economies. En ese contexto, cabe destacar la prioridad atribuida a los países de la Alternativa Bolivariana para las Américas (ALBA) como eje opositor de sus políticas. In this context, include the priority given to the countries of the Bolivarian Alternative for the Americas (ALBA) as the linchpin of his political opponent.

Segurança na América do Sul: uma abordagem histórico-conceitual

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)