Demanda latinoamericana de equipo petrolero, 1984-1990

Incluye Bibliografía

Computer applications in the Transport and Communications Division of the Economic Commission for Latin America and the Caribbean

Presenta la experiencia de la Division de Transportes y Comunicaciones en el uso de computadores para aplicaciones substantivas. Examina los sistemas aplicados - codigo de puertos, ISIS, TRANDIS, COMPA -; el uso de procesamiento de textos en la preparacion de documentos de investigacion e informes y en la correspondencia, y entrega algunas consideraciones con respecto al uso de los microcomputadores.

Environmental dimension in development planning

Includes bibliography

Proteccionismo de los países industrializados: estrategias regionales de negociación y defensa

Incluye Bibliografía

Entre Rieles: una experiencia interdisciplinaria en video sobre juventud popular urbana

Incluye Bibliografía

Argentina: recent dynamics in the software and IT services industry

Includes bibliography.

Revista CEPAL no. 118

Número especial por los 40 años de la Revista CEPAL

Flujos intersectoriales de conocimientos tecnológicos en países emergentes: un análisis de insumo-producto

En este trabajo se procura evaluar la producción, el uso y la difusión de tecnología en la estructura productiva de los países emergentes, en particular del Brasil, China, la Federación de Rusia y Sudáfrica, mediante el análisis de: i) usuarios y productores de tecnología; ii) contenido de investigación y desarrollo (i+d) en cada grupo de sectores, y iii) flujos de conocimientos técnicos entre esos grupos. Para alcanzar los objetivos fijados se utilizan matrices de insumo-producto combinadas con estadísticas de i+d sectoriales. Los principales resultados revelan considerables diferencias entre los países emergentes y también entre países en desarrollo y desarrollados, incluso en la jerarquía sectorial en cuanto a la producción y utilización de conocimientos tecnológicos, y en la dirección de los principales flujos de tecnología entre sectores. PALABRAS

The modern math movement(s): an essay on how elementary school teachers in Brazil gave meaning to it

The main goal of this paper is to discuss the production of meaning of the Modern Math Movement. The main sources were data available in school archives and interviews with former teachers that we use in order to focus on the diversity of perspectives -that complement it or oppose it-, which comes up when teachers refer to the Movement. Using this process of signification, teachers whether accept it, invalidate it or adapt it to guidelines imposed to them in their teaching activities. We establish a methodology by following the premises of Oral History to gather oral testimonies. The theoretical foundations in which this article is written are the guidelines of Paul Ricoeur's Hermeneutics, John Thompson's Depth Hermeneutics and Bolivar's narrative analysis.

Chemical composition of corn and sorghum grains cultivated in oxisol with different application methods and doses of zinc

A.P. Puga, R.M. Prado, B. Mattiuz, D.W. Vale, and I.M. Fonseca. 2013. Chemical composition of corn and sorghum grains cultivated in Oxisol according to different application methods and doses of zinc. Cien. Inv. Agr. 40(1):97-108. In general, tropical soils present low concentrations of zinc (Zn), and the deficiency of Zn is recognized as a world nutritional problem for cereal production and human beings. Therefore, the main goal of this study was to assess the effects of different methods of Zn application on the quality of corn and sorghum grains grown in Oxisol. Two experiments were set up in the experimental area of UNESP (campus of Jaboticabal, Brazil). The following nine treatments were applied: three doses of Zn by banded application (seed furrows), three doses of Zn by incorporation into soil (0-20 cm depth), foliar application, seed application, and control (no Zn applied). The treatments were arranged in randomized blocks with four replicates. The contents of Zn, carbohydrates and proteins were determined for corn and sorghum grains. Regardless of the method, Zn application promoted higher contents of this micronutrient in corn and sorghum grains. The banded application method of Zn in soil promoted greater contents of total carbohydrates, starch and protein in both cultures. The incorporation of Zn into the soil method provided higher contents of soluble carbohydrates in both corn and sorghum grains.

Geological and geophysical data integration for delimitation of mineralized areas in a supergene manganese deposits

Geophysical methods are widely used in mineral exploration. This paper discusses the results of geological and geophysical studies in supergene manganese deposits of southern Brazil. Mineralized zones as described in geological surveys were characterized as of low resistivity (20 Omega.m) and high chargeability (30ms), pattern found also in oxides and sulfite mineral deposits. Pseudo-3D modeling of geophysical data allowed mapping at several depths. A relationship between high chargeability and low resistivity may define a pattern for high grade gonditic manganese ore. Large areas of high chargeability and high resistivity may result in accumulation of manganese and iron hydroxides, due to weathering of the gonditic ore, dissolution, percolation and precipitation.

Classification of Eucalyptus urograndis hybrids under different water availability based on biometric traits

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Categorização e multifuncionalidade: léxico e gramática

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)