Solid mass falling into the reservoirs shallow water equations validity from the engineering point of view

Water waves generated by a solid mass is a complex phenomenon discussed in this paper by numerical and experimental approaches. A model based on shallow water equations with shocks (Saint Venant) has developed. It can reproduce the amplitude and the energy of the wave quite well, but because it consistently generates a hydraulic jump, it is able to reproduce the profile, in the case of high relative thickness of slide, but in the case of small relative thickness it is unable to reproduce the amplitude of the wave. As the momentum conservation is not verified during the phase of wave creation, a second technique based on discharge transfer coefficient α, is introduced at the zone of impact. Numerical tests have been performed and validated this technique from the experimental results of the wave's height obtained in a flume.

Ultramorphology and histology of the venom gland of workers of Apis mellifera (Hymenoptera, Apidae) before and after an electrical shock treatment

This paper describes the ultramorphology and histology of the venom reservoir in 14-day old workers of Apis mellifera, immediately before and after the application of electrical shocks with the object of causing venom elimination and reservoir collapse. The external epithelial surface of the reservoir was differentiated according to its morphological aspects into posterior, median, and proximal or duct regions at the ventral surface and into anterior and posterior regions at the dorsal surface. While the epithelium of the proximal region forms a ventral infolding, a dorsal salience is formed at this region. These structures and the epithelial regions persist both in full and empty reservoirs. The reservoir appeared full and distended before the electrical shocks were applied and became empty and withered afterwards due to the elimination of the secretion, without any reductions in length. Nevertheless, some secretion was kept inside the lumen, thus suggesting a possible role for the reservoir in the modification of the secretion.

Economic Survey of Latin America and the Caribbean 2007-2008: Macroeconomic policy and volatility

Includes bibliography

Economic Survey of Latin America and the Caribbean 2010-2011: Internacional integration and macroeconomic policy challenges amid global economic turmoil

Includes bibliography

Perspectivas de la agricultura y el desarrollo rural en las Américas: una mirada hacia América Latina y el Caribe, 2010

Incluye Bibliografía

The outlook for agriculture and rural development in the Americas: a perspective on Latin America and the Caribbean, 2010

Includes Bibliography

Crisis financieras en países 'exitosos'

Incluye Bibliografía

Financial crises in "successful" emerging economies

Includes bibliography

Entre el neoliberalismo y el crecimiento con equidad: tres décadas de política económica en Chile

Incluye Bibliografía

Decentralization and reform in Latin America: improving intergovernmental relations

Includes bibliography

Macroeconomía, comercio y finanzas para reformar las reformas en América Latina

Incluye Bibliografía

Debt financing rollercoaster: Latin American and Caribbean access to international bond markets since the debt crisis, 1982-2012

Includes bibliography

Review of Caribbean economic and social performance in the 1980's and 1990's

Includes bibliography

Macroeconomic policies in times of crisis: options and perspectives

Includes bibliography

El fomento de la inserción laboral de grupos vulnerables. Consideraciones a partir de cinco estudios de caso nacionales

Incluye Bibliografía