794 resultados para Serlachius, Allan
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Optimization of photo-Fenton degradation of copper phthalocyanine blue was achieved by response surface methodology (RSM) constructed with the aid of a sequential injection analysis (SIA) system coupled to a homemade photo-reactor. Highest degradation percentage was obtained at the following conditions [H(2)O(2)]/[phthalocyanine] = 7, [H(2)O(2)]/[FeSO(4)] = 10, pH = 2.5, and stopped flow time in the photo reactor = 30 s. The SIA system was designed to prepare a monosegment containing the reagents and sample, to pump it toward the photo-reactor for the specified time and send the products to a flow-through spectrophotometer for monitoring the color reduction of the dye. Changes in parameters such as reagent molar ratios. residence time and pH were made by modifications in the software commanding the SI system, without the need for physical reconfiguration of reagents around the selection valve. The proposed procedure and system fed the statistical program with degradation data for fast construction of response surface plots. After optimization, 97% of the dye was degraded. (C) 2009 Elsevier B.V. All rights reserved.
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This work presents the use of sequential injection analysis (SIA) and the response surface methodology as a tool for optimization of Fenton-based processes. Alizarin red S dye (C.I. 58005) was used as a model compound for the anthraquinones family. whose pigments have a large use in coatings industry. The following factors were considered: [H(2)O(2)]:[Alizarin] and [H(2)O(2)]:[FeSO(4)] ratios and pH. The SIA system was designed to add reagents to the reactor and to perform on-line sampling of the reaction medium, sending the samples to a flow-through spectrophotometer for monitoring the color reduction of the dye. The proposed system fed the statistical program with degradation data for fast construction of response surface plots. After optimization, 99.7% of the dye was degraded and the TOC content was reduced to 35% of the original value. Low reagents consumption and high sampling throughput were the remarkable features of the SIA system. (C) 2008 Published by Elsevier B.V.
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This paper describes the optimization and use of a Sequential Injection Analysis (SIA) procedure for ammonium determination in waters. Response Surface Methodology (RSM) was used as a tool for optimization of a procedure based on the modified Berthelot reaction. The SIA system was designed to (i) prepare the reaction media by injecting an air-segmented zone containing the reagents in a mixing chamber, (ii) to aspirate the mixture back to the holding coil after homogenization, (iii) drive it to a thermostated reaction coil, where the flow is stopped for a previously established time, and (iv) to pump the mixture toward the detector flow cell for the spectrophotometric measurements. Using a 100 mu mol L(-1) ammonium solution, the following factors were considered for optimization: reaction temperature (25 - 45 degrees C), reaction time (30 - 90 s), hypochlorite concentration (20 - 40 mmol L(-1)) nitroprusside concentration (10 - 40 mmol L(-1)) and salicylate concentration (0.1 - 0.3 mol L(-1)). The proposed system fed the statistical program with absorbance data for fast construction of response surface plots. After optimization of the method, figures of merit were evaluated, as well as the ammonium concentration in some water samples. No evidence of statistical difference was observed in the results obtained by the proposed method in comparison to those obtained by a reference method based on the phenol reaction. (C) 2010 Elsevier B.V. All rights reserved.
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The Center for the Study of Free-Reed Instruments Collection is an archival collection at the City University of New York Graduate Center’s Mina Rees Library which contains materials donated by Professor Allan W. Atlas, related to free-reed instruments and the International Concertina Association.
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Why even look at Politian, an unfinished failure? While it is true that Politian was a failure for its time and surely one of Poe's least successful attempts, it may improve on a stage with a more modern perspective. If not solely for examination of Poe's artistic effort, Politian also warrants a closer read due to its historical relevance by way of Beauchamp and Sharp. Poe, a most fastidious editor of his work, was ultimately required because of financial constraints to lay aside Politian in its unfinished state. As a result, the unedited Politian may provide insight into the writing process of Poe that other polished pieces cannot, and that, if nothing else, warrants a more precise study of his play.
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TOC: Clubs & Organizations…18 / Current Events & Music…30 / Faculty & Staff…33 / Activities & Events… / Honors & Graduation…65 / Graduates…75 / Yearbook Credits…111 / A Thank You…112 YEARBOOK COMMITTEE: Project Director, Vincent Banrey; Asst. Project Director, Catherine Whan; Editors (1986): Maricruz Saunders; (1987): Juan Jimenez, GloryAnn Torres; LAYOUT DESIGNERS: Vincent Banrey, Stephanie Bowen, Yvonne Brown, Jacqui Fernandez, Milton Ferreira, Omar Harris, Cornelius Huskins, Juan Jimenez, Wayne Keane, Richard Massie, Victoria Pamias, Richard Provost, Maricruz Saunders, GloryAnn Torres, Pedro Torres, Joan Walker, Catherine Whan. PHOTOGRAPHERS: John Carrero, Young Baek Choi, Randy Fader-Smith, Milton Ferreira, Roger Ince, Juan Jimenez, Umoja Kwanguvu, Seymour Lerman, Clinton Linton, Richard Provost, Jaidee amsinghani, Maricruz Saunders, Frank Tocco, GloryAnn Torres, Catherine Whan, Alan Young. ARTISTS: Cover Design: Madeline Vega; Endsheets: Oscar "DJ Ozzie" Ramirez; Division Pages: Jose Marti; International LaGuardia: Jacqui Fernandez; Illustrations: Richard Massie, Jacqui Fernandez, Madeline Vega. WRITERS: Yasmin Ahmed, Vincent Banrey, Warren Gardner, Juan Jimenez, Umoja Kwanguvu, Luis Merchant, Victoria Pamias, Richard Provost, Christiana Somerville, GloryAnn Torres, Joan Walker, Catherine Whan. SIGNIFICANT OTHERS: Word Processing: Blanca Arbito, Edward Hollins, Catherine Whan. Vincent Banrey Spread: developed by Blanca Arbito, Edward Hollins and GloryAnn Torres, Jacqui Fernandez, Catherine Whan. Creative Consultant: Edward Hollins. Promotions: George Condors. SPECIAL THANKS TO: Frank and Seymour of Classic Studios; Chuck Lindsey, Photo Workshop Instructor; Ted Schiffman of Taylor Publishing Co.; Dan Horn and Thurston Reyes of LaGuardia Theatre; and the Recreation staff. ALAN BERMAN IN MEMORIAM: Sketch, Tom Fink; Alan Speaking, Brian Gallagher; Remembering Dr. Alan Berman, Tuzyline Allan.
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Dissertação apresentada ao Programa de Pós-graduação em Comunicação - Mestrado da Universidade Municipal de São Caetano do Sul
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Este trabalho teve como objetivo geral investigar, sob a ótica da direção escolar, quais as funções da música nas escolas no município de Montenegro/RS. O trabalho está dividido em quatro capítulos que discutem as funções da música nas escolas, enfatizando a legislação educacional brasileira, bem como percorrendo situações de educação musical em outros países. O referencial teórico para a leitura dos dados encontrados tem como base as categorias listadas por Allan Merriam (1964) sobre as funções sociais da música. Nesta revisão encontram-se também outros autores que investigaram este mesmo tema nos contextos nacional e internacional. A metodologia utilizada na investigação, trata-se de um survey de pequeno porte nas escolas do município de Montenegro. Nas considerações finais do trabalho constata-se que o grande problema encontrado nas escolas para a efetivação do ensino de música é a falta de profissionais da educação musical atuando nestes estabelecimentos de ensino, problema este, surpreendente por ser Montenegro um município de longa tradição musical e que possui cursos de formação inicial e continuada para professores de música. Finalizando, destacam-se questões suscitadas pela investigação que poderão servir como sugestões para novas pesquisas bem como sugestões em busca da solução da falta de profissionais da educação musical no campo de atuação.
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O tema principal desta pesquisa é conhecer e delinear os diversos aspectos que constituíram e constituem as identidades musicais de um grupo de vinte alunas de um curso de Graduação em Pedagogia, através das narrativas de si orais e escritas. Nesse sentido, meu objetivo maior foi o de analisar como essas atuais ou futuras professoras se narram e escrevem acerca de suas memórias sob a forma de autobiografias musicais, reconstruindo lembranças das diferentes épocas de suas vidas. O referencial teórico que permeou esse trabalho estruturou-se em muitos autores como Allan Luke, Carmen Luke, Simon Frith, Lucy Green, Jorge Larrosa, Stuart Hall, Kathryn Woodward, Douglas Kellner, Brian Roberts, Ivor Goodson e Pat Sikes, Leonor Arfuch, Néstor Garcia Canclini, Lawrence Grossberg, entre outros. O capítulo I aborda aspectos da mídia no cotidiano de crianças e adolescentes, incluindo os diferentes estilos musicais. No capítulo II, trago alguns olhares sobre o tema das identidades, examinando as identidades culturais, a capacidade interpeladora da músicas, aspectos das identidades de professoras, as relações entre corpo e identidade e os entrelaçamentos entre subjetividade, memórias e identidades. O capítulo III aborda a escolha da metodologia e dos caminhos de pesquisa, onde tive a intenção de articular diferentes campos de estudos e abordagens como o dos Estudos Culturais, dos Estudos da Mídia, da Análise dos Discursos e da Educação Musical. Optei por utilizar entrevistas orais e autobiografias musicais inseridas num campo de trabalho da pesquisa biográfica e das narrativas de si No capítulo IV, apresento as vinte entrevistadas, alunas de um mesmo Curso de Pedagogia. No capítulo V, realizo a análise das entrevistas e autobiografias, intercalando exemplos com as temáticas da infância, da adolescência, da vida adulta, das lembranças musicais e religiosidade, dos cenários e artefatos culturais, dos discursos musicais da família, escola e amigos, as memórias musicais e as crenças pedagógicas e a música como espaço de conflitos e compartilhamento. Nas Considerações Finais, retorno ao amplo material recolhido através das narrativas de si orais e escritas, e penso nela, na perspectiva dos Estudos Culturais, como uma condição de possibilidade para algumas articulações, e quem sabe outros estudos, entre as áreas da Educação Musical e da Pedagogia.
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The aim of this study is to investigate, under the perspective of the investor, the determinant factors for the success of the stock brokerage process over the Web, through financial portals in the Brazilian Internet. This study is based on a theoretical framework which shows the evolution of the electronic commerce all over the world, and, specially, in Brazil; analyses the role of intermediation, desintermediation and reintermediation in the electronic commerce; stresses the differences between the traditional stocks brokerage process and the one made possible by the Internet; and, finally, describes the profile of the investors which operates their investments in the financial markets over the Web.The conclusions of this study are obtained based on a field study, conducted with Brazilian investors that operate using Internet based financial portals for the intermediation of their stock operations. The findings obtained where analyzed under the perspective brought by the theoretical reference framework, and, based on this approach, the critical aspects for the success of stock brokerage over the Internet, under the vision of the investor, could be deducted and discussed.
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Apresenta os métodos de avaliação de empresas baseados nos descontos de fluxos de caixa futuros, enfocando dois modelos, o do Fluxo de Caixa Descontado (DCF) e o do Lucro Econômico. Analisa cada um destes modelos em termos de seus componentes e explicita o inter-relacionamento destes últimos. Expõe a importância dos direcionadores de valor, que, entendidos de uma forma mais ampla, incluem, além de ROIC (retorno sobre o capital investido), e (taxa de crescimento) e NOPLAT (lucro operacional líquido já descontado dos efeitos do imposto de renda), o WACC (custo médio ponderado de capital) e o capital investido, entre outros. Apresenta um estudo de caso, tendo uma companhia industrial brasileira de capital fechado como seu objeto. Analisa os resultados deste estudo, principalmente as dificuldades encontradas no processo de cálculo do valor. Relaciona estas dificuldades à natureza do controle de capital fechado da companhia estudada. Extrai conclusões, apresenta algumas limitações e sugere pesquisas e desenvolvimentos futuros