História na Educação Matemática – um estudo sobre trabalhos publicados no Brasil nos últimos cinco anos

In this paper we report a study on research in the field of History in Mathematics Education conducted in Brazil in the last five years. We evaluate studies that are theoretical or report experiences on the support found in history that can contribute to the situations of teaching and learning of mathematics, based on the Proceedings of Seminarios Nacionais de Historia da Matematica and Encontros Luso-Brasileiros de Historia da Matematica. Examining the interests, directions and focus of research in the field, we found that the vast majority of studies address specific issues of History of Mathematics, and the number of studies on History in Mathematics Education is still very low. We note that, in the last five years, the arguments in favor of the teaching potential of the History of Mathematics, which is very present in the speech of teachers and managers of public education, has not yet been materialized in experiments or investigations to promote this link effectively.

Efeito do período de fornecimento de ração semi-complexa na fase inicial, sobre o ganho de peso compensatório nas fases de crescimento e terminação

One hundred and twenty crossbred pigs (Large White x Landrace) weaned at an average age of 28 days, were used. Pigs were alloted to five dietary treatments according to weight, sex and litter as follows: T1- Simple diet (SD) during whole Starter phase (SP) (28-63 days); T2- Semi-complex diet (SCD) for the first seven days followed by a SD during 28 days of SP; T3- SCD for the first 14 days followed by SD during 21 days of SP; T4- SCD for the first 21 days followed by SD during 14 days of SP; T5- SCD during the entire SP. A completely randomized block design was used with six replications. At the end of the SP one castrated male and one female, weighing closest to the average live weight of the group, were transferred to growing-finishing pens and fed growing-finishing diets ad libitum until they reached approximately 90kg live weight. Increasing the period of feeding the semi-complex diet resulted in a linear increase in average daily feed intake and average daily gain during the first 28 days of the initial phase. However, when the entire initial phase was considered there was a linear increase only in daily feed intake. There were no differences in incidence and severity of diarrhea in SP or in the performance of pigs during the growing-finishing phases. There were was no differences in average daily gain among diets from weaning to 90 kg body weight. It was concluded that the advantage of the semi-complex starter diet tended to disappear as age increased.

Estudo preliminar de uma metodologia baseada no conceito de graus-dia, para previsão das fases fenológicas de culturas agrícolas

This work develops a methodology (using the degree-days concept and linear regression), to forecast the duration of phenological phases in crops. An experiment was conducted in the greenhouse with three cultivars of cowpea (Vigna unguiculata (L.) Walp.), cv. Califórnia-781, Tvx 5058-09C and IT 81D-1032. The methodology was based on the relative thermal efficiency rate, determined for each species or cv. The results show that the proposed methodology may be a good alternative in works involving crops, especially because it does not require the repetition of the experiments.

Caracterização das fases de desenvolvimento de células gigantes induzidas por Meloidogyne exigua em raiz de seringueira (Hevea brasiliensis Muell. Arg.)

The developmental phases of giant cells induced by root-knot nematodes (Meloidogyne exigua) in rubber plant (Hevea brasiliensis) root were studied in relation to its number and size evaluated in eight sample dates. The results were subject to cluster analysis and principal component analysis. Sample dates were clearly distinct regarding giant cell development. As a result, the nematode infestation cycle was characterized by the following sequential phases: initial, equilibrium, choice and final.

Fragmentos da história da malária em São Paulo

Due to its great incidence in Brazil, malaria is one of the most important transmissible disease studied in the papers that deal with public health today. Although it is present in the Brazilian history since the colonial period, it has hardly been studied from its historic perspective. The present article intends to give a general view of the disease in Brazil, specially in the state of São Paulo. The research is based on historic papers of health and epidemies not only in Brazil but also in the world, found in the legislative documentation of São Paulo. Until 1930, malaria had spread through the country and the health authorities took no care in stablishing especific campaigns to face the disease. This negligence was mostly due to the fact that the mortality rate of malaria was lesser than variola, yellow fever or the many other endemic or epidemic diseases. Eradication seemed to be close to an end but the social and economic transformations after the 70's brought the disease in a proportion ten times worse.

Inclusão de ovo desidratado em rações para frangos de corte nas fases pré-inicial e de crescimento

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Interação entre grau de perda auditiva e o incômodo com zumbidos em trabalhadores com história de exposição ao ruído

Hearing loss and tinnitus impact the lives of workers in every instance of their lives. Aim: this paper aims to investigate the existence of a dose-response relationship between hearing loss and tinnitus by determining whether higher levels of hearing loss can be associated with increased tinnitus-related discomfort. Materials and method: this cross-sectional case study assessed 284 workers exposed to occupational noise through pure tone audiometry. Test results were categorized as defined by Merluzzi. Individuals complaining of tinnitus answered the adapted and validated Brazilian Portuguese version of the Tinnitus Handicap Inventory. A generalized linear model was adjusted for binomial data to test the interaction between these factors. Results: over 60% of the ears analyzed had hearing loss, while more than 46% of them had tinnitus. Tinnitus prevalence and risk rates increased as pure tone audiometry results got worse. The association between both, considering all hearing loss degrees, was statistically significant. Conclusion: the results point to a statistical association between hearing loss and tinnitus; the greater the hearing loss, the greater the discomfort introduced by tinnitus. 2009 © Revista Brasileira de Otorrinolaringologia.

Evolução da margem atlântica equatorial do Brasil: Três fases distensivas

The extension of the Pangaea started in the Upper Triassic and evolved to uplifts, magmatism and development a triple junction during the Mesozoic, and opening the Central Atlantic Ocean. The Brazilian Equatorial Atlantic margin was formed in three Mesozoic extensional events. The first event is recorded by the Calçoene Graben of the Foz do Amazonas Basin. The second event started in the Valangian and is recognized by the enlargement of the Foz do Amazonas Basin, formation of the Marajó and Grajaú basins, and the Gurupi Graben System. The third event commenced in the Albian related to northwestward progression of the rift system, which enlarged the Foz do Amazonas and formed the Potiguar, Ceará, Barreirinhas and Pará-Maranhão basins. At the end of the Lower Cretaceous the movements attenuated in the Marajó Basin and Gurupi Graben System; the extension concentrated in the Foz do Amazonas, Pará-Maranhão and Barreirinhas basins, and evolved to continental rupture of northern South America and western Africa opening of the Equatorial Atlantic Ocean.

Os paradigmas do desenvolvimento na história latino-americana

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Comentario a la presentação do José Antonio Ocampo: Os paradigmas do desenvolvimento na história latino-americana"

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Comentario a la presentação do José Antonio Ocampo: Os paradigmas do desenvolvimento na história latino-americana"

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A contribuição da história dos conceitos à ciência da informação: Dimensões categórico-abstratas e analítico-causais

The history of concepts, albeit still little explored by information science, can provide important contributions for the study of key concepts that constitute the theoretical-conceptual framework in a scientifi c context. Thus, the history of concepts is presented as a tool for the study of diachronic and synchronic features of the scientific concept in Information Science. For such, it was imperative to understand the intersection of the categorical-abstract and analytical-causal dimensions, both relevant for constituting the very proposition of the history of concepts elaborated by Reinhart Koselleck.

Etno-história e história indígena: Questões sobre conceitos, métodos e relevância da pesquisa

Since the 1990s, research into indigenous history has grown both quantitatively and qualitatively in Brazilian academia. Nevertheless the concepts of ethnohistory and indigenous history have been frequently used imprecisely. This article discusses the concept of ethnohistory and its development. Also, it discusses the interdisciplinary character of research into indigenous history and its social relevance. Questions are also raised about the training of human resources for teaching, the research into indigenous history, the teaching of it in the context of basic education and the professional ethics of the researcher.

Por uma história do desenvolvimento

This paper proposes a discussion on the need to prepare a history of development through effective approaches and methods of its own history. The objective is to show how, until now, historians have not produced a history of development in light of the discussions and disputes related to the structuring of history as a field of knowledge. To this end, it was demonstrated how history can help to identify the borders of history that allowed the consecration of a limited development model and tied only to criteria of economic performance.