La PYME en Centroamérica y su vinculación con el sector externo

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La distribucion del ingreso y las situaciones de pobreza

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La Ronda de Doha: eventuales impactos para el Uruguay

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Panorama del desarrollo territorial en América Latina y el Caribe

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Tablas de insumo-producto en América Latina

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Apertura y cambio estructural de la economía brasileña

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El rol del tipo de cambio real y la inversión en la diversificación de exportaciones en América Latina y el Caribe

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Evolución de las emisiones industriales potenciales en América Latina, 1970-2000

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El desarrollo sostenible de los asentamientos humanos en América Latina y el Caribe

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Tributação, seguridade e coesão social no Brasil

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Estimativa de alguns parâmetros de transporte de contaminantes para solos Brasileiros

This paper introduces an indirect estimate for the coefficients of distribution, hydrodynamic dispersion and retardation for contaminants commonly encountered in sanitary landfills and their liners, such as Cu2+ and K+; this estimate is based on the relationship between concentration and certain physical characteristics of typical Brazilian soils. The results of previous studies investigating the migration of contaminants were used to develop mathematical expressions from multiple non-linear regressions. Using minimal squares regression, this transport was linked to various combinations of contaminant concentration and both structural and textural characteristics of the porous medium. Various combinations of characteristics and concentrations were investigated, with a mathematical expression obtained for each. The relationship between percentage of clay and the contaminant content proved to be the most closely correlated with actual transport parameters, with coefficients close to one.

Estimativa da evapotranspiração de referência com uso do Irrigâmetro em Vitória da conquista/BA

The Irrigameter is aevapotranspiration measuring device used in irrigation management to optimize water. However, its use requires a prior adjustment to weather conditions where it will be used. The objective of this study was identify the corresponding height of water level inside the evaporimeterIrrigameter that estimate reference evapotranspiration in climate of the plateau of Vitoria da Conquista - BA, in different seasons. The experiment was a completely randomized design with five treatments and three replications. For each treatment was determined an average coefficient for the Irrigameter called K I, calculated as the ratio of estimated evapotranspiration in Irrigameter (ET I) and reference evapotranspiration (ET 0). The ET 0 was obtained by the Penman-Monteith - FAO 56. The results showed that the coefficients of Irrigameter increased exponentially with increasing water level inside the evaporimeter, and the equipment must be operated with the water level equal to 5.2 cm for better estimation of ET 0. The remaining heights observed in different seasons showed no significant difference when compared to annual average used as a reference in this study.

La sostenibilidad de la deuda pública, el efecto bola de nieve y el "pecado original"

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La agenda social latinoamericana del año 2000

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Estrategias de las empresas transnacionales en la Argentina en los años 1990

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