El uso de variables sintomáticas en la actualización de población de áreas menores: versión preliminar

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Esquema para evaluar la significación de las variables macroeconómicas en el análisis de decisión de incorporación de tecnologías

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América Latina: integración de las variables demográficas en las políticas sociales dirigidas a superar la pobreza

Documento Docente - Programa Global de Formación en Población y Desarrollo

Selection of desulfurizing agents and optimization of operational variables in hot metal desulfurization

The growing demand for steels with tighter compositional specifications led the Companhia Siderúrgica Nacional (CSN) to develop more efficient processes. To solve this problem this paper aims to identify the operational variables more impacting in the desulfurization process, specifically in torpedo car, as well as its causes and solutions. Then select and test, with laboratorial and industrial tests, desulfurizing agents based of CaC 2, CaO, CaCO3, and Mg to assess the cost per quantity of product desulfurized. The mixture with best results was not that one with highest content of CaC2. It is believed that this mixture showed better efficiency because of the increased agitation of the bath, produced by the releasing of gas from compound CaCO3 present in this mixture. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Lifestyle factors and socioeconomic variables associated with abdominal obesity in Brazilian adolescents

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Strategies to reduce the number of variables and the combinatorial search space of the multistage transmission expansion planning problem

This paper proposes strategies to reduce the number of variables and the combinatorial search space of the multistage transmission expansion planning problem (TEP). The concept of the binary numeral system (BNS) is used to reduce the number of binary and continuous variables related to the candidate transmission lines and network constraints that are connected with them. The construction phase of greedy randomized adaptive search procedure (GRASP-CP) and additional constraints, obtained from power flow equilibrium in an electric power system are employed for more reduction in search space. The multistage TEP problem is modeled like a mixed binary linear programming problem and solved using a commercial solver with a low computational time. The results of one test system and two real systems are presented in order to show the efficiency of the proposed solution technique. © 1969-2012 IEEE.

Brasil: cómo afectan las variables macroeconómicas a la confianza del consumidor

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Brazil: how macroeconomic variables affect consumer confidence

Includes bibliography

Tasa de natalidad y variables socio-económicas: una nota metodológica

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Tasa de natalidad y variables socio-económicas: una nota

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Inserción de las variables demográficas en la programación económica y social

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El uso de variables sintomáticas en la actualización de población de áreas menores

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Uso de variables sintomáticas para estimar la distribución espacial de la población

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Variables sintomáticas en las estimaciones poblacionales a nivel cantonal en Costa Rica

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