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.

Operational safety: Development of electronic system for dynamic balance evaluation of farm tractors

The present study aimed at the development and evaluation of a low cost electronic device in order to provide safety for farm tractor users. The major accident occurrence in agricultural surroundings is from farm tractor side bending. Therefore, this sensor was designed to detect and alert about it. The results were satisfying. © 2013 Taylor & Francis Group.

Environmental management and operational performance in automotive companies in Brazil: The role of human resource management and lean manufacturing

The main objective of this study is to verify the influence of Environmental Management (EM) on Operational Performance (OP) in Brazilian automotive companies, analyzing whether Lean Manufacturing (LM) and Human Resources (HR) interfere in the greening of these companies. Therefore, a conceptual framework listing these concepts was proposed, and three research hypotheses were presented. A questionnaire was elaborated based on this theoretical background and sent to respondents occupying the highest positions in the production/operations areas of Brazilian automotive companies. The data, collected from 75 companies, were analyzed using structural equation modeling. The main results are as follows: (a) the model tested revealed an adequate goodness of fit, showing that overall, the relations proposed between EM and OP and between HR, LM and EM tend to be statistically valid; (b) EM tends to influence OP in a positive and statistically weak manner; (c) LM has a greater influence on EM when compared to the influence HR has over EM; (d) HR has a positive relationship over EM, but the statistical significance of this relationship is less than that of the other evaluated relationships. The originality of this paper lies in its gathering the concepts of EM, LM, HR and OP in a single study, as they generally tend not to be treated jointly. This paper also provided valid empirical evidence for a littlestudied context: the Brazilian automotive sector. © 2012 Elsevier Ltd. All rights reserved.

ILPES: nuevas bases de trabajo y síntesis de actividades 1986-1987 = ILPES: new operational bases, and summary of activities 1986-1987

Presenta los principales lineamientos para el trabajo que el ILPES debera desempenar en el proximo bienio, asi como un resumen de las actividades realizadas en 1986-1987.

Proyecto de informe del Grupo de Expertas sobre las Estrategias de Ejecución para el Adelanto de la Mujer hasta el Año 2000 = Draft report of the Group of Experts on Operational Strategies for the Advancement of Women up to the Year 2000

Contiene la asistencia y organizacion de los trabajos de la reunion que tuvo como objetivo revisar los adelantos sobre la promocion de la mujer, la igualdad, el desarrollo y la paz en la region durante el decenio, y proponer medidas de accion para los gobiernos y otros organismos pertinentes que redunden en beneficio de las mujeres latinoamericanas.

Informe del Grupo de Expertas sobre las Estrategias de Ejecución para el Adelanto de la Mujer hasta el Año 2000 = Report of the Group of Experts on Operational Strategies for the Advancement of Women up to the Year 2000

Informa sobre la reunion cuyo objetivo fue revisar los adelantos de la situacion de la mujer registrados en la region durante el decenio y proponer medidas de accion para los gobiernos y otros organismos pertinentes que redunden en beneficio de las mujeres latinoamericanas.

Operational and implementation aspects of population policies

Includes bibliography

Bases metodológicas y operativas para la administración de la inversión pública = Methodological and operational bases for public investment management

Incluye Bibliografía