896 resultados para perdurance view


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Incluye Bibliografía

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Includes bibliography

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Includes bibliography

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Includes bibliography

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Publicado también en español: La política comercial en los países insuficientemente desarrollados desde el punto de vista latinoamericano. Economía, v. 19, No 69-70, p 25-45, 4o trimestre 1960 y 1o trimestre 1961; y en: American Economic Review, v. 49, No 2, p. 251-273, May 1959

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This report pursues three complementary aims. Firstly, it presents the first generation of country case studies on social protection systems in Latin America and the Caribbean, published in the ECLAC Project Documents collection; and it provides justifications for developing such systems. Secondly, it sets out a classificatory approach to social protection system in the region, which aims to provide a comparative basis for interpreting national cases. Lastly, using standardized data and case studies, it identifies major trends in the changes the region is undergoing in terms of social protection.

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This study identifies the key challenges facing the region in the domain of care provision. To that end it describes, analyses and discusses the concept of care, the rights approach and the public policies implemented in Latin America and the Caribbean on the social organization of care. The document describes care policies in the region generally, and it specifically analyses experiences of the social organization of care provision in four countries. In Chile, it studies the Chile Crece Contigo national child-care programme; in Costa Rica it reviews the National Care Network; in Ecuador, it analyses the recognition of unpaid reproductive work in the 2008 Constitution and the National Plan for Good Living; and in Uruguay it considers the National Care System.

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This article presents, under the perspective of Complexity Theory, the characteristics of the learning process of Spanish as a foreign language in Teletandem. Data were collected from two pairs of Portuguese-Spanish interagents, who were engaged in a systematic and regular interaction, based on the tandem principles. It was found that the learning experience is developed with the peculiarities that arise from the context, agents, members and their nuances, which revealed the presence of a shallow space between the systems of native and foreign languages.

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Let G be a group, let S be a subgroup with infinite index in G and let FSG be a certain Z2G-module. In this paper, using the cohomological invariant E(G, S, FSG) or simply E˜(G, S) (defined in [2]), we analyze some results about splittings of group G over a commensurable with S subgroup which are related with the algebraic obstruction “singG(S)" defined by Kropholler and Roller ([8]. We conclude that E˜(G, S) can substitute the obstruction “singG(S)" in more general way. We also analyze splittings of groups in the case, when G and S satisfy certain duality conditions.

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To assess the influence of anatomic location on the relationship between computed tomography (CT) number and X-ray attenuation in limited and medium field-of-view (FOV) scans. Materials and Methods Tubes containing solutions with different concentrations of K2HPO4 were placed in the tooth sockets of a human head phantom. Cone-beam computed tomography (CBCT) scans were acquired, and CT numbers of the K2HPO4 solutions were measured. The relationship between CT number and K2HPO4 concentration was examined by linear regression analyses. Then, the variation in CT number according to anatomic location was examined. Results The relationship between K2HPO4 concentration and CT number was strongly linear. The slopes of the linear regressions for the limited FOVs were almost 2-fold lower than those for the medium FOVs. The absolute CT number differed between imaging protocols and anatomic locations. Conclusion There is a strong linear relationship between X-ray attenuation and CT number. The specific imaging protocol and anatomic location of the object strongly influence this relationship.