SCHOOL PROTECTION SYSTEM: PROTECTING WHO, FROM WHOM?

The main objective of this article is to analyze the policy implanted in the schools in the State of São Paulo, Brazil, with a view to the prevention and intervention in the violence that occurs in the schools. The importance of such discussion is related to the analysis of the principles that are present and of the possible effectiveness of such a program in the school violence. This research is qualitative and the research methodology used was documentary analysis. The documents analyzed were those related to the policy of preventing violence in schools in the state of São Paulo/Brazil, called Protection System School. (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of The Association of Science, Education and Technology

Economic and technical feasibility study of a combined-cycle cogeneration system associated with cellulose plants

In this paper, is presented an economical and technical feasibility study of a combined cycle cogeneration system proposed to be used in a pulp plant located in Brazil, where around 95% of country's pulp production is done by the use of Kraft Process. This process allows the use of black liquor and other by-products as fuel. This study is based upon actual data from a pulp plant with a daily production of 1000 tons., that generates part of the energy demanded by the process in a conventional cogeneration system with condensing steam turbine and two extractions. The addition of a gas turbine was studied to compare electricity production level and its related costs between original system and the new one, considering that the former can use industrial by-products and firewood as fuel, when required. Several parameters related to electric generation systems operation and production costs were studied. The use of natural gas in the combined cycle, in comparison with the use of firewood in the conventional system was studied. The advantages of natural gas fuel are highlighted. The surplus availability and the electricity generation costs are presented as a function of pulp and black liquor production.

Networked control system for the guidance of a four-wheel steering agricultural robotic platform

A current trend in the agricultural area is the development of mobile robots and autonomous vehicles for precision agriculture (PA). One of the major challenges in the design of these robots is the development of the electronic architecture for the control of the devices. In a joint project among research institutions and a private company in Brazil a multifunctional robotic platform for information acquisition in PA is being designed. This platform has as main characteristics four-wheel propulsion and independent steering, adjustable width, span of 1,80m in height, diesel engine, hydraulic system, and a CAN-based networked control system (NCS). This paper presents a NCS solution for the platform guidance by the four-wheel hydraulic steering distributed control. The control strategy, centered on the robot manipulators control theory, is based on the difference between the desired and actual position and considering the angular speed of the wheels. The results demonstrate that the NCS was simple and efficient, providing suitable steering performance for the platform guidance. Even though the simplicity of the NCS solution developed, it also overcame some verified control challenges in the robot guidance system design such as the hydraulic system delay, nonlinearities in the steering actuators, and inertia in the steering system due the friction of different terrains. Copyright © 2012 Eduardo Pacincia Godoy et al.

Technical description of the DOCPAL System: aspects relevant to compatibility among population documentation systems

Includes bibliography

Activities of the ECLAC system to promote and support technical cooperation among developing countries and regions during the 2002-2003 biennium: note by the Secretariat

Includes bibliography

Actividades del sistema de la CEPAL para promover y apoyar la cooperación técnica entre países y regiones en desarrollo = Activities of the ECLAC system to promote and support technical co-operation among developing countries and regions

Incluye Bibliografía

Actividades del sistema de la CEPAL para promover y apoyar la cooperación técnica entre países y regiones en desarrollo durante el bienio 1996-1997 = Activities of the ECLAC system to promote and support technical cooperation among developing countries and regions during the biennium 1996-1997

Twenty-seventh session. Oranjestad, Aruba, 11-16 May 1998

Multilayer perceptron neural networks training through charged system search and its Application for non-technical losses detection

The non-technical loss is not a problem with trivial solution or regional character and its minimization represents the guarantee of investments in product quality and maintenance of power systems, introduced by a competitive environment after the period of privatization in the national scene. In this paper, we show how to improve the training phase of a neural network-based classifier using a recently proposed meta-heuristic technique called Charged System Search, which is based on the interactions between electrically charged particles. The experiments were carried out in the context of non-technical loss in power distribution systems in a dataset obtained from a Brazilian electrical power company, and have demonstrated the robustness of the proposed technique against with several others nature-inspired optimization techniques for training neural networks. Thus, it is possible to improve some applications on Smart Grids. © 2013 IEEE.

Report of the Technical Meeting on Population Documentation System Compatibility (DOCPAL, IDRC, PIDSA, Population Index)

La reunion tecnica de estudio sobre la compatibilidad de sistemas de documentacion en poblacion, demostro que a pesar de los diferentes servicios proporcionados por el Population Index, el PIDSA y DOCPAL, existe un gran numero de elementos comunes y areas de posible cooperacion. Los participantes senalaron como requisitos basicos contar con un nucleo de elementos de datos normalizados, categorias tematicas similares para las revistas de los 3 sistemas, un tesauro multilingue comun y su actualizacion permanente, asi como un formato de intercambio comun.