Formação de professores e seus saberes disciplinares em astronomia essencial nos anos iniciais do ensino fundamental

This paper presents some outcomes of a broader research on Astronomy Education in primary school teacher's education. From the analysis of the main astronomy subjects thought nationwide and the research outcomes, we identified a set of astronomy contents considered fundamental to the teachers practice. Through a research carried out among a sample of primary school teachers, however, we show that, even in these essential contents, persists alternative conceptions among those teachers. Data collected pointed out, thus, to the necessity of improving teacher's education in this area, taking into consideration astronomy edu cation research outcomes, in favor of a teaching which contemplates, at least, the fundamental contents on this subject.

Educação inclusiva: concepções de professores de ciências com relação à inclusão de alunos com deficiência visual em aulas de astronomia

Despite of intense discussion over recent decades about the inclusion of disabled people and the influence of conception of teachers about that inclusion for the effectuation of it, this work sought to identify conceptions of science teachers regarding the inclusion of students with visual impairment in the classes of astronomy providing basis for future studies.

Aproximações entre as comunidades científica, amadora e escolar: estudando as potencialidades de observatórios astronômicos para a educação em astronomia

This article considers some potential of activities developed in non-formal education in astronomy, like astronomical observatories and other related establishments. This kind of research is less explored in our country. We present, in this text, a model to study possible relations among these kinds of communities: the scientific, the amateur and the professional, applicable in astronomical observatories, in a motion against the local and punctual activities dispersion and pulverization of these establishments, and against the use of common sense to develop their activities, aiming the advancement of the astronomy education and its national research.

De arquivos e fontes, escrita e oralidade, infância e velhice: considerações acerca de um protocolo de pesquisa sobre um grupo escolar

The starting point of this paper is a brief report of a specific research about a Brazilian institution called Grupo Escolar. Its main intention, however, lies in the discussion on some methodological procedures and some distinct scientific practices in Human Sciences. Authors make some remarks on the possibilities of alternative research protocols, its boundaries and potentialities, specially focusing the study of school archives and the use of Oral History approach. The discussion about Oral History brings to the scene two others important themes – childhood and elderliness.

Memórias da educação em astronomia no Brasil: recortes a partir das falas de pesquisadores entrevistados sobre o tema

This paper presents a historical retrospective concerning data from a research in Astronomy Education in Brazil, after 1973. It was organized on the basis of the speech analysis of national researchers considered references in this field by their peers. Furthermore, it was elaborated on the basis of other studies from the areas of Science Education, Physics and Astronomy. This historical overview was developed in order to facilitate understanding of the contexts in which the interviewed researchers have developed professionally. Moreover, we attempted to recover the memory of the growing field of research in Astronomy Education in the country. We believe that the history presented can help those trying to understand the past in an attempt to resolve current and future demands.

Justificativas para o ensino de Astronomia: o que dizem os pesquisadores brasileiros?

We present here a qualitative analysis of a sample of papers published in Brazilian science education journals, which expresses researchers discourses related to Astronomy Education. Within this analytical universe, we sought for discursive excerpts about their justifications for the teaching of this subject, which made the basis for the production of a collective discourse, which identity is socially represented by the researchers authors set. Setting up articulations with discourse analysis, the procedures of the collective subject discourse show to be an important methodological tool to answer to the central question of this study: what do the Brazilian researchers assert as justifications for teaching Astronomy? In other words: why teach Astronomy? Outcomes point to the retaking of reflections about the importance of matters like as Astronomy in formal education, catalyzing teachers work innovative articulations.

Eficácia e ecotoxicidade do diquat em mistura com fontes de cobre para controle de Ceratophyllum demersum e alga unicelular e filamentosa

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Caixa experimentoteca: uma proposta para o ensino de astronomia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fontes proteicas para vacas leiteiras

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Dinâmica não linear e controle de um sistema vibratório modelado com memória de forma e, excitado por fontes de energia do tipo ideal e não ideal

Pós-graduação em Engenharia Mecânica - FEB

Biohidrogenação microbiana e o fluxo duodenal de ácidos graxos do rumen em novilhos de corte suplementados com fontes lipídicas em dietas contendo glicerina

Pós-graduação em Zootecnia - FCAV

Diferentes fontes de carboidratos em rações para leitões desmamados com diferentes pesos: pH e microbiota do trato gastrintestinal

Forty eight piglets from a commercial strain weaned at an average age of 21 days were used in order to evaluate effects of carbohydrates sources (lactose or maltodextrin) and the weights of piglets at weaning on the stomach pH, colon and rectum contents, and the amount of total coliform, Escherichia coli and Lactobacillus spp in digesta of ileum and cecum. The experiment was conducted in a randomized block design and analyzed in split plot, considering class of weight and carbohydrates as main plots and the slaughter age of animal as sub-plots. The stomach pH and intestinal contents were not influenced by the diets provided as well as the amount of total coliform. It was found that the presence of lactose in the feed decreased counts of Escherichia coli and Lactobacillus ssp in the ileum. Regarding the class of weight, the lighter piglets had lower counts of Escherichia coli and Lactobacillus. The maltodextrin can be used as an alternative to replace the lactose in the diet, regardless of the piglets weight at weaning, as it does not adversely affect the pH and the Lactobacillus population in the gastrointestinal tract.

Termografia digital por infravermelho do escroto e qualidade do sêmen em touros nelore (bos taurus indicus)

Aimed to study the relationship between scrotal temperature on semen quality by use of infrared thermography in Nelore bulls bred extensively. There were scrotal thermography and semen collection. Climatic data were collected by means of globe thermometer. The thermograms of the scrotum were obtained by digital infrared thermography. We carried out ejaculates through electroejaculation for analysis of quantitative and qualitative characteristics. For the data, we used analysis of variance and subsequently applied the Tukey test at 5%. (p <0.05) between animals for sperm vigor, sperm motility between animals and between crops, sperm concentration, total sperm and total viable sperm between groups, between harvests for the scrotum temperatures and climate data. It was concluded that the surface temperatures of the scrotum and climatic factors influence the quality of semen. Thermography is recommended as a complementary test in the evaluation of reproductive bulls.

Viabilidade econômica do uso do biogás proveniente da suinocultura em substituição a fontes externas de energia

The swine culture potentially generates waste with high organic load and pollutants, being responsible for the spread of pathogens, contamination of rivers, groundwater and soils, besides it produces foul odors and emit greenhouse gases. However, the high amount of organic matter, which expresses the amount of pollutant load, reflects the energetic potential of these wastes used as raw material in biogas generation through technology of digesters. The properly use of theses digesters provides the production of clean energy and promotes the conservation of the environment. The economic viability of the implantation of an Indian model digester on a small swine farm was verified based on the value from initial investments of deployment, maintenance costs, depreciation, and on the interest and revenues arising from the system. Besides, the amount of biogas produced daily and the average consumption of biogas by the most common used devices such as refrigerator, stove, water heater, and generator of electricity was calculated.. For a backdrop of 10 years, the results of economic indicators NPV of BRL 57,598.95, IRR of 48.38%, Simple Payback of 2.06 years, and Discounted Payback of 2.3 years, demonstrated a favorable outlook for the use of this technology, with the possibility to generate economic, social and environmental benefits.