999 resultados para Reatores eletrônicos
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The aim of this paper was to evaluate the efficiency of the treatment of cassava wastewater, separately from the root washing water, by means of ascending flux anaerobic digesters, with separation of the phases, without temperature control or addition of chemical products and to evaluate its suitability by means of its physical and chemical characteristics for throwing in receiving body, public sewage system or application in fertilization and irrigation. After reactors had been stabilized, essays were conducted varying feeding flow with 8.0, 12.0 and 16.0 Ld-1 corresponding to a hydraulic retention time of 8.17, 5.44 and 4.08 days, respectively. The best reduction for organic load reduction were obtained with hydraulic retention times (HRT) of 8.17 and 5.44 days with mean efficiencies of 89.8 and 90.9%, respectively.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Scientific research has shown remarkable advances in the formulation of criteria for assessing the quality of journalism practiced in the commercial media and public broadcasting, comprising aspects such as management models, business principles, parameters to the assessment of results and exercise of social responsibility. However, there are fewer investigations on the practice of journalism in digital public communication formats explored by government web portals. The contribution of this paper lies in a proposal of elements for the construction of parameters for evaluating the quality of journalism in the digital public communication. The proposal is inspired by criteria for evaluating the quality of commercial media and public broadcasting and suggests means for its application in the journalism practiced in the context of government web portals.
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An expansion of the professional field of Public Relations can be seen nowadays, influenced by factors such as the increasing use of information and communications technologies for the dissemination of information on public management and the potential creation of dialogue between government and citizens. Despite this trend, there is still a need for specific knowledge about normative aspects of public communication generated by governments on the internet and its role in the fulfillment of the right to information. This article offers a contribution to fulfill the gap of guidelines and standards for professional performance. It describes the results of empirical research which identified the potential contribution of government web portals of the main cities of São Paulo, in the southeastern Brazil, to the strengthening of citizenship, considered in its dimension of exercising the right to information about public policies, particularly those which have an impact on education. The depth and breadth of information were investigated according with twelve categories of evaluation: history; diagnoses; goals; goals; resources and current actions; planned resources and actions; efficiency; effectiveness; impact; cost-effectiveness; user satisfaction; and equity. The data found on the analyzed portals correspond to the average of 11% of which was considered, under the theoretical-methodological context of the research, as information necessary to comprise the full characterization of a public policy in relation to the categories of assessment. Opportunities to improve government web portals were detected, for which we suggest communication management strategies.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Public communication comprises the dissemination of information on the various aspects of public management, with transparency and accountability, including the use of the existing technological resources. Particularly in the field of cultural policies, the right to information must be exercised as a contribution to political participation and economic expansion. This paper presents the results of research that was investigated, through analysis of the content under thirteen categories of evaluation, of the quality of information on cultural policies in web portals of the different spheres of government in Brazil. The results show the lack of information on the processes of development and implementation of policies in that field.
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This paper presents a technique to add flexibility in the control of power electronic converters. The power converter can function as an active power filter, as a local power source interface or perform both functions i. e. mitigate current disturbances and inject power into the grid simultaneously, configuring it as a multifunctional device. The main goal is to extract the full capability of the grid connected power electronic converter to achieve maximum benefits. To achieve this goal, the orthogonal current decomposition of the Conservative Power Theory is used. Each orthogonal current component is weighted by means of different compensation factors (k_i), which are set instantaneously and independently, in any percentage by means of the load performance factors (λ_i), providing an online flexibility in relation to compensation objectives. Finally, to validate the effectiveness and performance the proposed approach, simulations and experimental results are presented.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Engenharia Civil - FEIS
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Química - IQ
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Pós-graduação em Engenharia Mecânica - FEG
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)