Macroeconomic policies in times of crisis: options and perspectives

Includes bibliography

Bone mineral density on conventional and digitized images under different parameters of digitization and storage

Aim: To assess the bone mineral density on conventional and digitized images, comparing whether different parameters of digitization and storage change these values. Methods: Twenty radiographs were taken from five partially dentulous dry mandibles with an aluminum 7-mm stepwedge placed on the superior edge of the film. After processing, the films were digitized with a resolution of 600 and 2,400 d.p.i. and saved as TIFF and JPEG files. On every conventional and digitized image, circular regions of interest were selected for densitometry and radiographic contrast analysis. Results: Pearson's correlation coefficient showed a significant and strong mean gray values association between digitized and conventional images, differing from radiographic contrast that did not show a significant association. ANOVA did not reveal a statistically significant difference in bone density and radiographic contrast among the four digitized image groups, but the conventional image contrast was significantly lower. Conclusions: Bone mineral density did not differ in both conventional and digitized images. The parameters of image compression and resolution, tested in this study, did not change the results of densitometry and digitization process increased the radiographic contrast.

La política fiscal para el afianzamiento de las democracias en América Latina: reflexiones a partir de una serie de estudios de caso

Incluye bibliografía

Volatilidad macroeconómica y respuestas de políticas

Incluye bibliografía

Crisis y políticas públicas en América Latina y el Caribe

Incluye Bibliografía

Crisis and public policies in Latin America and the Caribbean

Includes bibliography

La política fiscal para el afianzamiento de las democracias en América Latina

Incluye bibliografía

Volatilidad macroeconómica, espacio fiscal y gobernanza

Incluye bibliografía

Resumen de exposición en el seminario sobre regulación de servicios de infraestructura: agua y electricidad

Incluye Bibliografía

Sumary of the presentation at the seminar on the regulation of public services: water and elctricity

Includes bibliography

América Latina y China e India: hacia una nueva alianza de comercio e inversión

Incluye Bibliografía

Crisis internacional y oportunidades para la cooperación regional

Incluye Bibliografía

La medición de la pobreza en dimensiones distintas al ingreso

Incluye Bibliografía

Dependência estrutural da capacidade de rotação plástic em vigas de concreto armado

Summary In this work the structural dependence of plastic rotation capacity in RC beams is evaluated using the Finite Element Method. The objective is to achieve a better understanding of the non-linear behavior of reinforced concrete members and perform extensive parameter studies, using a rational model developed by Bigaj [1] to analyze the phenomenon of plastic rotation capacity in reinforced concrete members. It is assumed that only bending failure is relevant due to sufficient member resistance against shear and torsion. The paper begins with the physical and theoretical background of the phenomenon of plastic hinge development in RC structures. Special emphasis is laid on the issue of structural dependence of deformation capacity of plastic hinges in RC members. Member size dependence and influence of properties of construction materials were emphasized as well. The essential components of the Bigajs model for calculating the plastic rotation capacity are discussed. The behaviour of the plastic hinge is analysed taking into account the strain localisation in the damage zones of the hinge region. The Fictitious Crack Model (FCM) and the Compressive Damage Zone Model (CDZ) are adopted in a Fracture Mechanics approach to model the behaviour of concrete in tension and compression, respectively. The approach is implemented in FEMOOP, a FEM in-house solver under development, and applied to evaluate ductility in 2D beams. The models were generated with GiD, a pre-processor and post-processor developed by CIMNE, and analyzed with the capabilities implemented in FEMOOP. © Universitat Politècnica de Catalunya, Barcelona, España 2010.

Eficiencia y equidad en el sistema de salud chileno

Incluye Bibliografía