Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

How Cr2O3 influences the microstructure and nonohmic features of the SnO2(COx, Mn1-x)O-based varistor system

An investigation was made to discover how the addition of Cr2O3 affects the microstructural heterogeneity and nonohmic features of the SnO2(Co-x, Mn1-x)O-based varistor system, with x varying from 0 to 1. The presence of Cr2O3 was found to strongly increase the nonohmic features when x = 1. However, the nonohmic features of the system decrease when x drops from 1 to 0, a behavior explained by the increase of the junction heterogeneity within the system's microstructure. accompanied by ail excess of precipitates at the triple point in the grain boundary region due to modified MnO sintering. The presence of these precipitates causes the leakage current to increase in response to the creation of ail ineffective barrier. The effect produced by heat-treating these systems in oxygen- and nitrogen-rich atmospheres suggests that, according to mechanisms previously discussed in the literature, Cr2O3 is more susceptible to oxygen, so that increasing the amount of oxygen in the grain boundary region may improve the system's nonohmic properties. (c) 2005 Elsevier Ltd. All rights reserved.

GIS_EM (Geographic information system for environmental monitoring) - A software implemented at Paulínia refinery (REPLAN) for management of environmental data

The computational program called GIS_EM (Geographic Information System for Environmental Monitoring), a software devised to manage geographic information for monitoring soil, surface, and ground water, developed for use in the Health, Safety, and Environment Division of Paulinia Refinery is presented. This program enables registering and management of alphanumeric information pertaining to specific themes such as drilling performed for sample collection and for installation of monitoring wells, geophysical and other tests, results of chemical analyses of soil, surface, and groundwater, as well as reference values providing orientation for soil and water quality, such as EPA, Dutch List, etc. Management of such themes is performed by means of alphanumeric search tools, with specific filters and, in the case of spatial search, through the selection of spatial elements (themes) in map view. Documents existing in digital form, such as reports, photos, maps, may be registered and managed in the network environment. As the system centralizes information generated upon environmental investigations, it expedites access to and search of documents produced and stored in the network environment, minimizing search time and the need to file printed documents. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

Impact of the Caribbean Information System on the activities of the Caribbean Community Secretariat: with special reference to CARISPLAN abstracts

Includes bibliography

Development of a support vector machine-based navigation system for driving a mobile robot through paths in plantations

The use of mobile robots turns out to be interesting in activities where the action of human specialist is difficult or dangerous. Mobile robots are often used for the exploration in areas of difficult access, such as rescue operations and space missions, to avoid human experts exposition to risky situations. Mobile robots are also used in agriculture for planting tasks as well as for keeping the application of pesticides within minimal amounts to mitigate environmental pollution. In this paper we present the development of a system to control the navigation of an autonomous mobile robot through tracks in plantations. Track images are used to control robot direction by preprocessing them to extract image features. Such features are then submitted to a support vector machine in order to find out the most appropriate route. The overall goal of the project to which this work is connected is to develop a real time robot control system to be embedded into a hardware platform. In this paper we report the software implementation of a support vector machine, which so far presented around 93% accuracy in predicting the appropriate route. © 2012 IEEE.

Informe de la Reunión de Expertos sobre Diseño de un Sistema Regional de Información sobre Actividades de Información = Report of the Meeting of Experts on Design of a Regional Information System on Information Activities

Incluye Bibliografía

Manual de selección y adquisición de documentos para el Sistema de Información para la Planificación (INFOPLAN) = Manual of selection and acquisition of documents for the Planning Information System (INFOPLAN)

Incluye Bibliografía

Report on the Workshop on Techniques for Effective Participation in the Caribbean Information System

Informa sobre el taller que tuvo como objetivo mejorar las tareas del Servicio de Documentacion de Haiti en su funcion de punto focal nacional del Sistema de Informacion del Caribe.

Report of the Workshop on Indexing and Abstracting Techniques for Effective Participation in the Caribbean Information System

Informa sobre el taller que tuvo como objetivo establecer procedimientos para mejorar los servicios del Stichting Planbureau Suriname y capacitarlo en su funcion de punto focal nacional del Sistema de Informacion del Caribe

Report of the Workshop on Techniques for Effective Participation in the Caribbean Information System

Informa sobre el taller que tuvo como objetivo establecer procedimientos para mejorar los servicios del Centro de Documentacion del Secretariado Tecnico de Republica Dominicana y capacitarlo en su funcion de punto focal nacional del sistema de Informacion del Caribe.

Informe de la Reunión de Evaluación del Sistema de Información del Caribe = Report of the Evaluation Meeting on the Caribbean Information System

Contiene la organizacion y las conclusiones de la reunion que tuvo como objetivo evaluar las actividades de CARISPLAN entre 1979 y 1983. Incluye lista de participantes y de documentos presentados.

Evaluation of the technical aspects of the Caribbean Information System

La evaluacion considero los siguientes aspectos tecnicos: 1) preparacion de registros bibliograficos; 2) normalizacion de autoridades; 3) cambios en la estructura de las hojas de ingreso de informacion; 4) tipo de indizacion y resumen; 5) metodos y manuales de capacitacion; 6) seleccion del material a ingresar al Sistema; 7) analisis de contenido; y 8) uso del Macrotesauro de la OCDE.