921 resultados para MITIGATION
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The environmental analysis is an important tool used in forecasting and mitigation of environmental problems. Focusing on the occupation of marginal areas of the Corumbataí River in an urban stretch in the city of Rio Claro (SP), this study aimed to gather information on situations of risk, both to the environment and the population, verified in that area. Through field observation and in specific studies, the geological and geotechnical aspects, the characteristics of surface waters and aspects of urbanization were analyzed. The results show that the environmental problems diagnosed are related to lack of planning in the occupation of the area. Moreover, the natural characteristics of the physical environment expose people to risks such as floods and soil slides.
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The purpose of this work is to present a frequency domain model to demonstrate the operation of an electromagnetic arrangement for controlling the injection of zero-sequence currents in the electrical system. Considering the diversity of sequential distribution of harmonic components of a current, the device proposed can be used in the process of mitigation of zero-sequence components. This device, here called electromagnetic suppressor, consists of a blocker and filter both electromagnetic, whose joint operation can provide paths of high and low impedances that can be conveniently adjusted in order to search for a desired performance. This study presents physical considerations, mathematical modeling and computer simulations that clearly demonstrate the viability of this application as a more viable alternative in the conception of filtering systems. The performance analysis is based on the frequency response of harmonic transmittances. The efficacy of this technique in direct actions to maximize the harmonic mitigation process is demonstrated. ©2010 IEEE.
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An important alteration of the equivalent loads profile has been observed in the electrical energy distribution systems, for the last years. Such fact is due to the significant increment of the electronic processors of electric energy that, in general, behave as nonlinear loads, generating harmonic distortions in the currents and voltages along the electric network. The effects of these nonlinear loads, even if they are concentrated in specific sections of the network, are present along the branch circuits, affecting the behavior of the entire electric network. For the evaluation of this phenomenon it is necessary the analysis of the harmonic currents flow and the understanding of the causes and effects of the consequent voltage harmonic distortions. The usual tools for calculation the harmonic flow consider one-line equivalent networks, balanced and symmetrical systems. Therefore, they are not tools appropriate for analysis of the operation and the influence/interaction of mitigation elements. In this context, this work proposes the development of a computational tool for the analysis of the three-phase harmonic propagation using Norton modified models and considering the real nature of unbalanced electric systems operation. © 2011 IEEE.
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Available also in spanish and portuguese
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Le document Quel genre d'état pour quel genre d'égalité? analyse les progrès de l'égalité entre les sexes dans la région, 15 ans après l'Adoption du Programme d'action de Beijing, 10 ans après la formulation des objectifs du Millénaire pour le développement et 3 ans après l'Adoption du Consensus de Quito à la dixième Conférence régionale sur les femmes de l'Amérique latine et des Caraïbes qui s'est tenue en 2007. Il examine en outre les succès et les défis auxquels sont confrontés les gouvernements à la lumière de l'interaction entre l'état, le marché et les familles, en tant qu'institutions sociales construites sur la base de politiques, de lois, d'us et coutumes qui, ensemble, créent les conditions pour rénover ou perpétuer les hiérarchies sociales et de genre.
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Le document Quel genre d'État pour quel genre d'égalité? analyse les progrès de l'égalité entre les sexes dans la région, 15 ans après l'adoption du Programme d'action de Beijing, 10 ans après la formulation des objectifs du Millénaire pour le développement et 3 ans après l'adoption du Consensus de Quito à la dixième Conférence régionale sur les femmes de l'Amérique latine et des Caraïbes qui s'est tenue en 2007. Il examine en outre les succès et les défis auxquels sont confrontés les gouvernements à la lumière de l'interaction entre l'État, le marché et les familles, en tant qu'institutions sociales construites sur la base de politiques, de lois, d'us et coutumes qui, ensemble, créent les conditions pour rénover ou perpétuer les hiérarchies sociales et de genre.
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The document What kind of State? What kind of equality? analyses the progress of gender equality in the region 15 years after the approval of the Beijing Platform for Action, 10 years after the drafting of the Millennium Development Goals and 3 years after the adoption of the Quito Consensus at the tenth session of the Regional Conference on Women in Latin America and the Caribbean, held in 2007. It also examines the achievements made and challenges faced by governments in light of the interaction between the State, the market and families as social institutions built on the foundation of policies, laws, and customs and habits which, together, establish the conditions for renewing or perpetuating gender and social hierarchies.
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En el documento ¿Qué Estado para qué igualdad? se analiza el progreso de la igualdad de género en la región tras 15 años de la aprobación de la Plataforma de Acción de Beijing, 10 años de la formulación de los Objetivos de Desarrollo del Mileno y 3 años de la adopción del Consenso de Quito en la décima Conferencia Regional sobre la Mujer de América Latina y el Caribe realizada en 2007. Se examinan además los logros y desafíos que enfrentan los gobiernos a la luz de la interacción entre el Estado, el mercado y las familias como instituciones sociales construidas a partir de políticas, leyes, usos y costumbres que, en conjunto, establecen las condiciones para renovar o perpetuar las jerarquías sociales y de género.
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No documento Que tipo de Estado? Que tipo de igualdade? analisa-se o progresso da igualdade de gênero na Região depois de 15 anos da aprovação da Plataforma de Ação de Beijing, 10 anos da formulação dos Objetivos de Desenvolvimento do Milênio e 3 anos da adoção do Consenso de Quito, na décima Conferência Regional sobre a Mulher da América Latina e do Caribe realizada em 2007. Examinam-se, além disso, as conquistas e desafios que enfrentam os governos à luz da interação entre o Estado, o mercado e as famílias como instituições sociais construídas a partir de políticas, leis, usos e costumes que, em conjunto, estabelecem as condições para renovar ou perpetuar as hierarquias sociais e de gênero.
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Este documento recoge contribuciones de las ministras y autoridades de los mecanismos para el adelanto de la mujer de América Latina y el Caribe, que definieron su contenido en la cuadragésima tercera reunión de la Mesa Directiva de la Conferencia Regional sobre la Mujer de América Latina y el Caribe (Puerto España, 7 y 8 de julio de 2009), y que enviaron documentos e información para su preparación y enriquecieron su versión final con aportes y debates en dos foros virtuales. En este informe se integran los avances del Observatorio de igualdad de género de América Latina y el Caribe y se da cuenta del trabajo realizado durante sus dos primeros años de funcionamiento, con énfasis en la autonomía económica de las mujeres.