2,795 research outputs found

    Um intelectual cosmopolita: trajetórias de Noah Sobe na (história da) educação

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    Full Professor of Cultural and Educational Policy Studies in the School of Education at Loyola University Chicago (USA), Noah W. Sobe specializes in the history of education, and in comparative and international education. His researches examine the global circulation of educational policies and practices with particular emphasis on the ways in which schools work as loci of resistance to the cultural impositions upon individuals, peoples, societies, and worlds. He is also interested in research methodologies in comparative education, investigating specifically how notions such as those of context, nation, transnational and global/globalization can be reconceptualized. Also, he dedicates himself to the history of affect and emotion in education, with focus on the history of boredom in school. His formation and access to the educational arena, as well as his theoretical and methodological choices are examined in this interview, which also discusses his academic connections to Brazilian researchers associated to Pontifical Catholic University of São Paulo (PUC-SP), to the School of Education and Institute of Brazilian Studies of the University of São Paulo, and explores his current attributions as Senior Project Officer in the United Nations Educational, Scientific and Cultural Organization (UNESCO) Education Research and Foresight program, part of the Futures of Education: Learning to Become initiative. The reflection also covers the effects of COVID-19 on the international educational scene. As a whole, this dialogue offers the readers a stimulating and contemporary arch of problematizations, among which the disturbing statement made by Noah Sobe that “future is a cultural fact”.Professor Titular de Estudos em Política Cultural e Educacional na Escola de Educação da Universidade Loyola em Chicago (EUA), Noah W. Sobe é especialista em história da educação, história comparada e educação internacional. Suas pesquisas examinam a circulação global de políticas e práticas educacionais com ênfase particular nas maneiras pelas quais as escolas funcionam como locais de resistência à imposição cultural a pessoas, povos, sociedades e mundos. Interessa-se também por metodologias de pesquisa em educação comparada, especificamente interrogando-se como as noções de contexto, nação, transnacional e globalização/global podem ser reconceitualizadas. Por fim, dedica-se ainda à história do afeto e da emoção na educação, com foco na história do tédio na escola. Sua formação e trânsito na arena educativa, bem como as escolhas teóricas e metodológicas são abordadas nesta entrevista, que se estende ainda sobre as relações tramadas com pesquisadores brasileiros associados à Pontifícia Universidade Católica de São Paulo (PUC-SP), à Faculdade de Educação e ao Instituto de Estudos Brasileiros da USP, e explora suas atuais atribuições como Oficial Sênior de Projeto no programa de Pesquisa e Prospecção em Educação da Organização das Nações Unidas para a Educação, a Ciência e a Cultura (UNESCO) junto à iniciativa Futures of Education: Learning to Become (“Futuros da Educação: Aprendendo a se Tornar”). A reflexão abrange também os efeitos da COVID-19 no cenário educativo internacional. Em seu conjunto, o diálogo entabulado oferece ao leitor um leque instigante e atual de problematizações, dentre as quais a inquietante afirmação feita por Noah Sobe de que o “futuro é um fato cultural”

    Central A-polynomials for the Grassmann Algebra

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    2010 Mathematics Subject Classification: 16R10, 16R40, 16R50.Let F be an algebraically closed field of characteristic 0, and let G be the infinite dimensional Grassmann (or exterior) algebra over F. In 2003 A. Henke and A. Regev started the study of the A-identities. They described the A-codimensions of G and conjectured a finite generating set of the A-identities for G. In 2008 D. Gonçalves and P. Koshlukov answered in the affirmative their conjecture. In this paper we describe the central A-polynomials for G.∗ Partially supported by CNPq/Brazil 620150/2008-4, and by INCT. ∗∗ Supported by DPP/UnB and by CNPq-FAPDF PRONEX grant 2009/00091-0 193.000.580/2009)

    Predation on adult females of Podocnemis expansa Schweigger (Testudines, Podocnemididae) by Panthera onca Linnaeus (Carnivora, Felidae), in Tocantins State

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    Podocnemis expansa (tartaruga-da-amazônia) é o maior e mais importante representante da fauna de quelônios da Amazônia devido à sua importância econômica como fonte alimentar para as populações indígenas e ribeirinhas desta região. Apesar disso, os aspectos relacionados à sua biologia reprodutiva, assim como os índices de predação natural de animais adultos em seu habitat são pouco conhecidos. Nessa pesquisa foi averiguado o número de fêmeas de P. expansa predadas por Panthera onca (onça-pintada) em um rio da Amazônia Brasileira. A onça-pintada é o único predador das fêmeas adultas de P. expansa nas praias do rio Javaés, Estado do Tocantins, predando em média 3,66% das fêmeas em postura. A predação se dá sempre à noite, quando as fêmeas sobem às praias para nidificar.Podocnemis expansa (Amazonian giant River turtle) is the largest and more important representative of the Amazonian turtle's fauna because their economic importance as food resource to the indigenous and riverine populations. Aspects related to their reproductive biology, and natural predation of adults in its habitat are poorly known. In order to estimate the predation rates of females of P. expansa we have registered the number of turtles with signs of been killed by Panthera onca (jaguar) in a River of the Brazilian Amazon. Jaguar was the only predator of the adult females of P. expansa in the Javaés River beaches (Tocantins State), predating about 3.66% of the females (33 of 901). Predation always happens at night, when females leave water in order to nest.Fil: Salera Jr., Giovanni. Universidade Federal Do Tocantins; BrasilFil: Costa Gonçalves Portelinha, Thiago. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina. Universidade de Sao Paulo; BrasilFil: Malvásio, Adriana. Universidade Federal Do Tocantins; Brasi

    Benthic macro-invertebrates as indicators of ecological fragility of small rivers ('igarapés') in a bauxite mining region of Brazilian Amazonia

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    Benthic macroinvertebrate communities were studied in the igarapés Saracá, Caranã and Água Fria near Porto Trombetas, Municipality of Oriximiná, State of Pará, Brazil (1°25' to 1°35'S and 56°15' to 56°W). The main objective was to investigate the potential use of the benthic macroinvertebrates community as indicators of the ecological fragility of the igarapés located in an area of the Amazon basin influenced by bauxite mining. These aquatic ecosystems have low pH (< 4.5); low electrical conductivity (< 90 µS cm-1); low or undetectable total alkalinity; low nutrient concentrations in the sediment, which implies low primary productivity; low species richness; low secondary productivity; and low rates of organic matter decomposition. The benthic macroinvertebrates utilize mainly allochthonous organic matter. Some areas of the ecosystems investigated have been modified by bauxite tailings (especially in their sediment granulometry), by a dam formed by railroad construction (which altered the hydrodynamics and eliminated the terra firma vegetation), and by accidental discharges of various minerals from the railroad traffic and bauxite mining. These factors have drastically modified the local benthic macroinvertebrate communities. The value of benthic macroinvertebrates as indicators of ecological fragility, the health of the ecosystem investigated, and water quality is evaluated

    Cosmic homogeneity: a spectroscopic and model-independent measurement

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    Cosmology relies on the Cosmological Principle, i.e., the hypothesis that the Universe is homogeneous and isotropic on large scales. This implies in particular that the counts of galaxies should approach a homogeneous scaling with volume at sufficiently large scales. Testing homogeneity is crucial to obtain a correct interpretation of the physical assumptions underlying the current cosmic acceleration and structure formation of the Universe. In this Letter, we use the Baryon Oscillation Spectroscopic Survey to make the first spectroscopic and model-independent measurements of the angular homogeneity scale θh\theta_{\rm h}. Applying four statistical estimators, we show that the angular distribution of galaxies in the range 0.46 < z < 0.62 is consistent with homogeneity at large scales, and that θh\theta_{\rm h} varies with redshift, indicating a smoother Universe in the past. These results are in agreement with the foundations of the standard cosmological paradigm.Comment: 5 pages, 2 figures, Version accepted by MNRA
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