Inelastic photoproduction at HERA: A second charmonium crisis?

Measurements of the inelastic photoproduction of charmonium at HERA have ignited a new charmonium crisis. The Color Singlet approach to computing onium production cross sections fits the data for large charmonium energy fraction z, where color octet models fail. This approach is however in qualitative disagreement with a wealth of information that exist on charmonium production by other initial states. We here suggest that the source of the discrepancy between color octet models (whether implemented in the soft color or NRQCD formalism) and data is due to the neglect of non-perturbative effects. Implementing these in a scheme originally developed for Drell-Yan phenomenology, we illustrate how agreement with the data is achieved. © 1999 Elsevier Science B.V. All rights reserved.

Regional hydroclimatic variability and Brazil's 2001 energy crisis

Purpose - This paper seeks to address the issue of persistent and widespread drought conditions during 2000 and 2001, which were the apparent cause of the decline of water levels in the reservoirs of Brazilian hydroelectric power plants. Design/methodology/approach - This issue is addressed here through a case study of the hydroclimatology of the Paraíba river basin, in Southeast Brazil, home to four large multi-purpose operational reservoirs. Findings - The data analysis shows that neither changes in the frequency nor magnitude of extreme hydrological events (droughts and floods) nor in annual rainfall amounts can be detected from the existing climate record. The explanation is consistent with the fact that the terrestrial water and energy cycles are tightly, and non-linearly, coupled through evapotranspiration. Research limitations/implications - Therefore small change in the seasonality of rainfall can have a significant impact on the basin's overall hydrologic regime, and thus on the availability of water resources. Originality/value - Often, adaptation and resilience to climate variability are discussed in the context of catastrophic events such as floods and droughts. This study suggests that a different type of impacts, those associated with subtle, yet persistent changes of seasonality in the terrestrial water cycle, cannot be ignored in studies of long-term sustainability of water resources. © Emerald Group Publishing Limited.

Panorama de la Inserción Internacional de América Latina y el Caribe 2008-2009: crisis y espacios de cooperación regional

Incluye Bibliografía

Latin America and the Caribbean in the World Economy 2008-2009: Crisis and opportunities for regional cooperation

Incluye Bibliografía

Panorama de la Inserción Internacional de América Latina y el Caribe 2009-2010: crisis originada en el centro y recuperación impulsada por las economías emergentes

Incluye Bibliografía

Latin America and the Caribbean in the World Economy 2009-2010: A crisis generated in the centre and a recovery driven by the emerging economies

Incluye Bibliografía

Panorama de la Inserción Internacional de América Latina y el Caribe 2011-2012: crisis duradera en el centro y nuevas oportunidades para las economías en desarrollo

Incluye Bibliografía

Latin America and the Caribbean in the World Economy 2011-2012: Continuing crisis in the centre and new opportunities for developing economies

Includes bibliography

Desarrollo, crisis y equidad en América Latina

Incluye Bibliografía

Reformas para la cohesión social en América Latina: panorama antes de la crisis

Incluye Bibliografía

Espacios iberoamericanos: Iberoamérica frente a la crisis

Incluye Bibliografía

La Argentina ante la nueva internacionalización de la producción: crisis y oportunidades

Incluye Bibliografía

El desarrollo en América Latina después de la crisis financiera de 2008

Incluye bibliografía

Crisis financieras en países 'exitosos'

Incluye Bibliografía

Corea y Taiwán ante la crisis financiera asiática

Incluye Bibliografía