O ensino de ciências na educação infantil: análise de práticas docentes na abordagem metodológica da pedagogia histórico-crítica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Atividades de campo em educação ambiental: construção coletiva de diretrizes metodológicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Platão e a matemática: uma questão de método

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A prática de indexação: análise da evolução de tendências teóricas e metodológicas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

A classificação arquivística: aspectos teóricos de sua constituição

Classification is a fundamental activity for the organization and management of archival document collection, as it is from this function that are based the priorities for the description and the bases for appraisal procedures. This article seeks through the fundamental works to the theoretical and methodological development of the Archival Science characterizes the historical and conceptual background from the classification notion. This article aims to answering some questions about the expansion of its importance during the development of its theory and its use on today. Is also sought to characterize the history of the Archival Science as a discipline since the classification was one of the first activities to be theorized.

Suicídio no Brasil e os contextos geográficos: contribuições para política pública de saúde mental

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As concepções de função de Frege e Russell: um estudo de caso em filosofia e história da matemática

Pós-graduação em Educação Matemática - IGCE

An efficient methodological approach in the didatic of automation applied to integrated manufacturing

This work presents challenges and solutions for the teaching and learning of automation applied to integrated manufacturing by means of a methodological approach based on techniques, tools and industrial equipment directly applicable in the industry. The approach was implemented in a control and automation engineering course divided into expositive and laboratory classes. Since the success of the approach is mainly from the practical activities, the article focus more on activities developed in laboratory than theorical classes. Copyright © 2007 IFAC.

Fish exposure to nano-TiO2 under different experimental conditions: Methodological aspects for nanoecotoxicology investigations

The ecotoxicology of nano-TiO2 has been extensively studied in recent years; however, few toxicological investigations have considered the photocatalytic properties of the substance, which can increase its toxicity to aquatic biota. The aim of this work was to evaluate the effects on fish exposed to different nano-TiO2 concentrations and illumination conditions. The interaction of these variables was investigated by observing the survival of the organisms, together with biomarkers of biochemical and genetic alterations. Fish (Piaractus mesopotamicus) were exposed for 96h to 0, 1, 10, and 100mg/L of nano-TiO2, under visible light, and visible light with ultraviolet (UV) light (22.47J/cm2/h). The following biomarkers of oxidative stress were monitored in the liver: concentrations of lipid hydroperoxide and carbonylated protein, and specific activities of superoxide dismutase, catalase, and glutathione S-transferase. Other biomarkers of physiological function were also studied: the specific activities of acid phosphatase and Na,K-ATPase were analyzed in the liver and brain, respectively, and the concentration of metallothionein was measured in the gills. In addition, micronucleus and comet assays were performed with blood as genotoxic biomarkers. Nano-TiO2 caused no mortality under any of the conditions tested, but induced sublethal effects that were influenced by illumination condition. Under both illumination conditions tested, exposure to 100mg/L showed an inhibition of acid phosphatase activity. Under visible light, there was an increase in metallothionein level in fish exposed to 1mg/L of nano-TiO2. Under UV light, protein carbonylation was reduced in groups exposed to 1 and 10mg/L, while nucleus alterations in erythrocytes were higher in fish exposed to 10mg/L. As well as improving the understanding of nano-TiO2 toxicity, the findings demonstrated the importance of considering the experimental conditions in nanoecotoxicological tests. This work provides information for the development of protocols to study substances whose toxicity is affected by illumination conditions. © 2013 Elsevier B.V..

Towards criterion validity in classroom language analysis: methodological constraints of metadiscourse and inter-rater agreement

This paper reports on a process to validate a revised version of a system for coding classroom discourse in foreign language lessons, a context in which the dual role of language (as content and means of communication) and the speakers' specific pedagogical aims lead to a certain degree of ambiguity in language analysis. The language used by teachers and students has been extensively studied, and a framework of concepts concerning classroom discourse well-established. Models for coding classroom language need, however, to be revised when they are applied to specific research contexts. The application and revision of an initial framework can lead to the development of earlier models, and to the re-definition of previously established categories of analysis that have to be validated. The procedures followed to validate a coding system are related here as guidelines for conducting research under similar circumstances. The advantages of using instruments that incorporate two types of data, that is, quantitative measures and qualitative information from raters' metadiscourse, are discussed, and it is suggested that such procedure can contribute to the process of validation itself, towards attaining reliability of research results, as well as indicate some constraints of the adopted research methodology.