A Comissão Nacional do Livro Didático durante o Estado Novo (1937-1945)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Uso da técnica de análise de óleo lubrificante em motores diesel estacionários, utilizando-se misturas de biodiesel e diferentes níveis de contaminação do lubrificante

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Informática e democratização do ensino: o uso de computadores na rede pública do município de Araraquara

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação energética e econômica do agroecossistema algodão: uma abordagem entre sistemas familiares de produção do Paraguai e Brasil

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

O mundo no lugar: o atual projeto de modernização no município de Santarém (PA) : (a viabilidade do território brasileiro para uso corporativo e a modernização do Porto de Santarém)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aplicação de ethephon em videira 'Niagara Rosada' (Vitis labrusca L.) visando produção na entressafra do Estado de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Uso da calculadora nas aulas de Matemática: possibilidades e percepção de licenciandos e professores

The objective of this work is to analyze teaching situations with the use of calculator inside classroom aiming to understand its function and potential to the learning of Mathematics. A survey was carried out about the students and teachers’ conceptions concerning the use of calculator as an auxiliary tool in the learning of Math . The first part of the research is based by means of official documents (Parâmetros Curriculares Nacionais (PCN) , Proposta Curricular do Estado de São Paulo, Guia do Programa Nacional do Livro Didático (PNLD)) , researches and other publications , characterizing by a bibliographic study. The survey with the participants— Math students and teachers acting in public or private schools of São Paulo state— was done through a questionnaire and interviews . The results show that most part of interviewed people are in favor of the use of calculator in the classroom . However , a big part of this number still consider it only as a tool to speed calculations with high numbers or decimals . It was verified that teachers who have recently graduated and have taught for a short period of time accept and comprehend the role of calculator more easily in some activities and consider it as an useful and auxiliary tool to the students’ learning

Biodegradação da vinhaça resíduo da produção de etanol

The State of São Paulo is responsible for the largest sugar cane production in Brazil, as well as the largest production of ethanol made of this raw material – which is widely used as fuel for automobiles. This utilization began in the 1970’s, with the institution by the Brazilian government of the National Alcohol Program (PRO-ÁLCOOL), as a consequence of the petroleum crisis, rising again five years ago, with the development of flex fuel cars. The obtaining process of ethanol originates residues; amongst them, vinasse is the one that’s generated in the largest amount (an average of 10 to 13 litres/litre of ethanol produced). The disposal of this residue in waters was only forbidden in 1978, but before that, researchers had already been investigating its utilization as raw material. This paper had the objective of accompany the biodegradation of vinasse by evaluating the oxygen comsumption during it until the ultimate Biochemical Oxygen Demand (uBOD), performed in twenty days; another objective was to analyse the biomass production of Saccharomyces cerevisae in this residue. Physical and chemical analyses of the residue were also performed, as well as acute toxicity essays using Daphnia similis and Dugesia tigrina, before and after its biodegradation. The physical and chemical analyses pointed elevated acidness (pH = 3,98), conductivity (8,30 mS/cm) and COD (25.693,43 mg O2/L) and mean quantity of suspended solids (5.246 mg/L). The toxicity essays indicated absence of toxic potential in vinasse after biodegradation for both species. The uBOD degradated until 88,22% of the COD, demonstrating the possibility of biodegradation of most of the residue’s organic load in a relatively short period of time. S. cerevisae caused a 37,03% COD diminution in vinasse, diminished its conductivity and promoted a slight elevation of the pH; it obtained low biomass...(Complete abstract click electronic access below)

Caracterização e dinâmica da produção familiar no município de Urânia - SP: perspectivas de permanência e reprodução social

A pesquisa teve como objetivo central identificar e analisar as diversas estratégias de permanência e reprodução social dos produtores familiares e os efeitos do Programa Nacional de Fortalecimento da Agricultura Familiar (PRONAF) no município de Urânia - SP. Constata-se que as atividades desenvolvidas externamente a unidade produtiva e principalmente a previdência social rural são importantes na composição da renda dos produtores familiares. Mas, as principais estratégias são de base agrícola, visto que as atividades agropecuárias constituem-se na principal fonte de renda dos produtores familiares, destacando-se a opção por culturas que proporcionam alta rentabilidade por hectare cultivado, tais como: as frutíferas (uva, laranja, caju, dentre outras) e olerícolas (berinjela, jiló, milho verde etc.). Nesse sentido, a relevância das atividades agropecuárias, principalmente a fruticultura, em especial a uva que demanda grandes investimentos em tecnologia, despesas em insumos faz com que o PRONAF desempenhe importante papel para o desenvolvimento das atividades agropecuárias através das modalidades de custeio e investimento no conjunto de produtores familiares pesquisados, apesar de suas limitações no que tange a marginalização de produtores menos capitalizados e atuação exclusivamente vinculada à concessão de crédito. Identificamos que a gestão profissionalizada é um importante elemento para o progresso econômico da unidade produtiva, proporcionando condições mais favoráveis à permanência do produtor familiar na atividade agrícola e a sucessão hereditária na agricultura familiar, que perfaz a minoria dos casos em função da resistência dos jovens em permanecer no espaço rural decorrentes da baixa rentabilidade e de outros fatores como a penosidade do trabalho...(Resumo completo, clicar acesso eletrônico abaixo)

Biodiesel etílico de babaçu x diesel B S1800: ensaio de opacidade da fumaça do trator agrícola variando os horários do dia

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

As unidades heterogenéricas em dicionários bilíngues de espanhol para aprendizes brasileiros: análise do tratamento lexicográfico

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Projeto gráfico de livros didáticos da educação de jovens e adultos: análise sob a perspectiva dos docentes de escolas de Bauru (SP) e de Avaré (SP)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação energética econômica do agroecossistema algodão: uma abordagem entre sistemas familiares de produção do Paraguai e do Brasil

The objective of this work was to evaluate the energy and economic efficiency indexes per unit of cotton agro-ecosystem area in family production systems of Paraguay and Brazil; and, to establish a relationship between the energy and economic. Typologies presented by the Program to Support Small Cotton Holdings (Paraguay), and by the National Program for Strengthening Family Agriculture (Brazil). Family systems of the two countries were identified; these are located from Paraguay (San Juan–CA) and from Brazil (Leme–SP). To construct the energy expenditure structure of the cotton agro-ecosystem, as well as to assess the economic efficiency, the mean values obtained were considered, when they presented similarities in production systems and they were within the typology proposed in this study. From the technical itinerary observed the Paraguayan agro-ecosystem depended (fossil fuel 56.76%) and industrial source (35.99%). Thus, the energy balance of the agricultural stage was established, which attained a value of 17,740.69 MJ ha-1; an energy efficiency of 5.28, and a cultural efficiency of 3.04. The Brazilian agro-ecosystem depended on energy from industrial source (insecticides 39.82%) and from fossil fuel (33.59%); it reached an energy balance of 19,547.88 MJ ha-1; an energy efficiency of 2.12, and a cultural efficiency index of 0.71. In the economic and energy indicator ratio, with regard to the months referring to the harvest time, that is to say, March, April, and May, the maximum economic efficiency indicator of paraguay was attained in the month of May (1,00), and from Brazil in the month of May (1,71). Both production systems analyzed were presented efficient, however, dependent of external circumstances and non-renewable energy sources.

Valiação energética e econômica do agroecossistema algodão: uma abordagem entre sistemas familiares de produção do Paraguai e Brasil

The objective of this work was to evaluate the energy and economic efficiency indexes per unit of cotton agro-ecosystem area in family production systems of Paraguay and Brazil; and, to establish a relationship between the energy and economic. Typologies presented by the Program to Support Small Cotton Holdings (Paraguay), and by the National Program for Strengthening Family Agriculture (Brazil). Family systems of the two countries were identified; these are located from Paraguay (San Juan–CA) and from Brazil (Leme–SP). To construct the energy expenditure structure of the cotton agro-ecosystem, as well as to assess the economic efficiency, the mean values obtained were considered, when they presented similarities in production systems and they were within the typology proposed in this study. From the technical itinerary observed the Paraguayan agro-ecosystem depended (fossil fuel 56.76%) and industrial source (35.99%). Thus, the energy balance of the agricultural stage was established, which attained a value of 17,740.69 MJ ha-1; an energy efficiency of 5.28, and a cultural efficiency of 3.04. The Brazilian agro-ecosystem depended on energy from industrial source (insecticides 39.82%) and from fossil fuel (33.59%); it reached an energy balance of 19,547.88 MJ ha-1; an energy efficiency of 2.12, and a cultural efficiency index of 0.71. In the economic and energy indicator ratio, with regard to the months referring to the harvest time, that is to say, March, April, and May, the maximum economic efficiency indicator of paraguay was attained in the month of May (1,00), and from Brazil in the month of May (1,71). Both production systems analyzed were presented efficient, however, dependent of external circumstances and non-renewable energy sources.

Cana-de-açúcar e álcool combustível: histórico, sustentabilidade e segurança energética

The cane sugar is important since the early days in the history of the country, following the discovery of Brazil since the colonial period, therefore, the culture has an important role in the Brazilian economy, being one of the main products. In the 1970s with the advent of the economic crisis, geopolitical and the possibility of depletion of oil, countries dependent on imported fuel, sought new energy alternatives. In Brazil, it was decreed in 1975 the creation of the National Alcohol Program - PROALCOOL, who had several years of rising, the increase of distilleries and marketing of cars powered with ethanol blend. Due to the decrease in the price of oil the importance of the program significantly reduced, returning to peak only in 1979, ie, the second phase of the program. Conceived as one of the vectors of the national response to the crisis in oil prices '70s, the program persisted at times rising in others not reaching for more than three decades. Brazil is the second largest ethanol producer, second only to the U.S., where the raw material comes from corn, which becomes a bottleneck biodiesel production because it competes with food production. New technologies developed to increase ethanol production combined with sustainability and economic viability are being held, the principal is the second generation ethanol, known as cellulosic ethanol, ethanol plus third and fourth generation.