Iramaia Jorge Cabral de Paulo

Mapas conceituais como instrumento de avaliação em um curso introdutório de mecânica quântica

Neste trabalho sao apresentados e comentados mapas conceituais elaborados cooperativamente por estudantes de Licenciatura em Fisica ao final de um curso introdutorio de 15 horas-aula sobre conceitos basicos de Mecânica Quântica. A intencao do trabalho e a de ilustrar a potencialidade dos mapas conceituais como instrumentos fornecedores de evidencias de aprendizagem significativa. Alem disso, comenta-se tambem o uso de mapas conceituais com outras finalidades instrucionais.

ESTIMATION OF THE VOLUME AND TURGOR PRESSURE STOMATAL OF VICIA FABA ALONG DAY

The stomata control the plant water outlet and this control depends on the stomatic volume variation which in turn depends on the variation of the stomatic turgor pressure. Therefore, the aim of this study was to estimate the volume and turgor pressure of the stomata Vicia faba through the day. The biophysical parameters of the stomata Vicia faba found in the literature and Van’t Hoff equation were utilized to estimate the osmotic pressure generated by the osmotically active solutes (potassium, chloro and sucrose). The resulting values are in agreement with literature and can be used in simulations, such as the study of leaf transpiration through the equation Weyers and Meidner (1990).

Analysis of thermal conductivity in a seasonal flooded forest in the northern Pantanal

Research involving the flux of energy in the soil has been intensified in order to increase the understanding of the geophysical behavior of the Pantanal-Brazil. In present study was examined the seasonal variation of the thermal soil conductivity in the Pantanal for the study of energy flow in the soil to Pantanal region. The average values obtained by the Fourier equation showed that the soil thermal conductivity in the wet and dry seasons was 8.69 W.m-1.oC-1 and 6.65 W.m-1.oC-1 respectively. The seasonal variation of the thermal conductivity of the soil was 30.68% higher in the wet season than in the dry season due to soil moisture in the wet season. It was also noted that the seasonal variation of temperature in the soil layer was higher in the wet season than in the dry season due to a lower incidence of solar radiation in this season.

ESTIMATIVA SAZONAL DA EMISSIVIDADE ATMOSFÉRICA ATRAVÉS DA EQUAÇÃO DE BRUTSAERT NO NORTE DO PANTANAL MATO-GROSSENSE

Nos ultimos anos, tem-se intensificado as pesquisas ambientais na regiao do Pantanal a fim de se conhecer o comportamento micrometeorologico da regiao. No presente trabalho buscou-se verificar se a equacao de Brutsaert pode ser utilizada para a estimativa da emissividade atmosferica na regiao do pantanal Mato-grossense, considerando dois periodos sazonais, sendo um chuvoso e um seco, tendo como base para comparacao os dados obtidos na estacao micrometeorologica aplicados na equacao do balanco de energia, a fim de que possa contribuir para as pesquisas destinadas ao estudo das trocas de energia entre a superficie e a atmosfera da regiao pantaneira. Os resultados obtidos mostraram-se consistentes para o metodo utilizado, pois os valores estimados pela equacao de Brutsaert aproximaram-se significativamente dos valores obtidos atraves da equacao do balanco de energia que utilizou dados coletados no local para os dois periodos estudados. Palavras–chave: Equacao de Brutsaert, periodos sazonais, balanco de energia, Pantanal

O problema da linguagem e o ensino da mecânica quântica no nível médio

In this paper the problem of language and the grasping of meanings in quantum mechanics is discussed as a relevant subject for the teaching of basic concepts at high school level. It is well known that language is fundamental for the comprehension of science and for the construction of scientific concepts which are specific but at the same time might be generalized in the context of everyday life. The concern with the language shaped and used by quantum mechanics was externalized by their own creators. Given the problem of the relationship between the classical and the quantum languages, in this paper we argue that a way to deal with quantum phenomena is to keep the classical language but a different logic must be used, and so we are trying to locate this option from an epistemological point of view and show its implications for teaching.