3,389 research outputs found
Circulação e apropriação do ideário do Movimento da Matemática Moderna nas séries iniciais: as revistas pedagógicas no Brasil e em Portugal
No full textCirculação e apropriação do ideário do Movimento da Matemática Moderna nas séries iniciais: as revistas pedagógicas no Brasil e em Portugal/ Borges, Rosimeire Aparecida Soares – São Paulo: [s.n.], 2011. 223.f ; il. ; 30cm Tese (Doutorado) – Universidade Bandeirante de São Paulo, Curso de Doutorado em Educação Matemática. Orientadora: Tânia Maria Mendonça Campos Co-Orientador: Wagner Rodrigues Valente 1. Revistas Pedagógicas. 2.Movimento da Matemática Moderna. 3. Circulação e Apropriação. I. Borges, Rosimeire Aparecida Soares II. Circulação e apropriação do ideário do Movimento da Matemática Moderna nas séries iniciais: as revistas pedagógicas no Brasil e em Portugal.A presente tese teve por objetivo analisar a dinâmica de circulação e apropriação do Movimento da Matemática Moderna (MMM) no Ensino Primário no Brasil e em Portugal, a partir das revistas pedagógicas destinadas aos docentes desse nível de ensino. Sendo a imprensa pedagógica de grande relevância para a História da Educação, elegeram-se para análise, na presente investigação, artigos publicados nos periódicos pedagógicos do Brasil e de Portugal, no período do Movimento da Matemática Moderna (1955 a 1985). A sustentação teórica para analisar essas fontes baseou-se nas ideias de autores como Ferreira (2008), Nóvoa (1993), Carvalho (2006), Julia (2001), Viñao (2000) e Chartier (1991), o que permitiu avaliar como os diversos discursos sobre a Matemática Moderna foram edificados. Após análises e comparações, o que se pode dizer é que, no âmbito do Ensino Primário, os discursos veiculados preconizaram uma matemática fundamentada na Teoria dos Conjuntos e na Lógica Matemática, com ênfase no uso da linguagem simbólica e nos aspectos metodológicos na prescrição dos materiais concretos para esse ensino. Nesses discursos defendeu-se, categoricamente, um ensino-aprendizagem da Matemática, fundamentado na teoria psicogenética de Jean Piaget. Em ambos os países, os discursos veiculados nas revistas pedagógicas levaram aos professores primários informações sobre a ―nova matemática‖ que, juntamente com novas metodologias de ensino, foram experimentadas. Embora com características diversas entre si, os periódicos pedagógicos estudados contribuíram para a difusão de concepções e apropriações de ideias sintonizadas com os reformistas do ensino da Matemática, tendo em vista transmitir aos professores leitores os saberes necessários para a formação das crianças. As várias possibilidades apontadas pelos professores autores dos artigos publicados nas revistas pedagógicas do Brasil e de Portugal revelam suas apropriações do MMM, porém, os indícios e direcionamentos encontrados podem levar à realização de outras investigações que apresentem características de como a Matemática Moderna chegou às práticas pedagógicas em sala de aula nos dois países
R.M. Simmons presentation, Rena Smart book review
No full textR.M. Simmons of the Gospel Music Workshop of America gives a presentation on the African influence in the African American religious experience. He explains how African slaves brought to America their concept of music (utilitarian concept of music). Simmons further discusses the fusion between the utilitarian concept and the Western concept of religion resulting in spirituals. He also describes hymn categories in early forms of formal African American worship experiences. Simmons takes questions from the audience among which is Dr. Riggins Earl Jr. Video concludes with a book review on Christian Theology and Ethics by Rena Smart.The Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the National Endowment for Humanities - Humanities Collections and Reference Resources Implementation Project Grant in supporting the processing and digitization of a number of its major archival collections as part of the project: Spreading the Word: Expanding Access to African American Religious Archival Collections at the Atlanta University Center Robert W. Woodruff Library.</em
Velocity-Gradient Probability Distribution Functions in a Lagrangian Model of Turbulence
No full textThe Recent Fluid Deformation Closure (RFDC) model of lagrangian turbulence is recast in path-integral language within the framework of the Martin-Siggia-Rose functional formalism. In order to derive analytical expressions for the velocity-gradient probability distribution functions (vgPDFs), we carry out noise renormalization in the low-frequency regime and find approximate extrema for the Martin-Siggia-Rose effective action. We verify, with the help of Monte Carlo simulations, that the vgPDFs so obtained yield a close description of the single-point statistical features implied by the original RFDC stochastic differential equations
Espécies de Hypholoma (Fr.) P. Kumm. e Stropharia (Fr.) Quél. (Strophariaceae,Agaricales) no Rio Grande do Sul, Brasil
No full textEspécimes de Hypholoma (Fr.) P. Kumm. e Stropharia (Fr.) Quél., ambos pertencentes à família Strophariaceae Singer & A.H. Sm., de ocorrência no estado do Rio Grande do Sul foram estudados. O estudo baseou-se em coletas realizadas pelo autor no período entre março de 2004 e setembro de 2005, e também na revisão do material depositado em herbários do estado, Brasil e exterior. As análises macro e microscópica dos basidiomas foram realizadas segundo metodologia usual para estudo de fungos agaricóides, e todo o material coletado encontra-se preservado no Herbário do Departamento de Botânica da Universidade Federal do Rio Grande do Sul (ICN). Neste estudo, concluiu-se que o gênero Hypholoma está representado no Rio Grande do Sul pelas seguintes espécies: H. aurantiacum (Cooke) Faus, H. ericaeum (Pers.: Fr.) Kühner, e H. subviride (Berk. & M.A. Curtis) Dennis. Da mesma forma, o gênero Stropharia encontra-se representado no estado por: S. acanthocystis Cortez & R.M. Silveira, S. aeruginosa (Curtis: Fr.) Quél., S. alcis var. austrobrasiliensis Cortez & R.M. Silveira, S. apiahyna (Speg.) Cortez & R.M. Silveira, S. araucariae Cortez & R.M. Silveira, S. coronilla (Bull.: Fr.) Quél., S. dorsipora Esteve-Rav. & Barrasa, S. earlei Norvell & Redhead, S. rugosoannulata Farl. ex Murrill e S. semiglobata (Batsch: Fr.) Quél. Dentre estas, Stropharia acanthocystis, S. alcis var. austrobrasiliensis e S. araucariae, são descritos como novos táxons para a ciência; S. apiahyna é proposta como uma nova combinação; S. dorsipora, S. aeruginosa e S. earlei são citadas, respectivamente, pela primeira vez para a América do Sul, Brasil e Rio Grande do Sul. São apresentadas chaves de identificação, descrições e ilustrações macro e microscópicas de todas as espécies estudadas.Specimens of the genera Hypholoma (Fr.) P. Kumm. and Stropharia (Fr.) Quél. (family Strophariaceae Singer & A.H. Sm.), from the Rio Grande do Sul State were studied. This survey was based on collections made by the author from March 2004 to September 2005, as well the revision of Brazilian and foreign herbaria. Macroscopic and microscopic study of the basidiomata followed usual techniques for the study of agarics, and all collected specimens are deposited in the Herbarium of the Department of Botany of the University of Rio Grande do Sul (ICN). We concluded that the genus Hypholoma is represented by the following species in the Rio Grande do Sul State: H. aurantiacum (Cooke) Faus, H. ericaeum (Pers.: Fr.) Kühner, and H. subviride (Berk. & M.A. Curtis) Dennis. The genus Stropharia comprised the species: S. acanthocystis Cortez & R.M. Silveira, S. aeruginosa (Curtis: Fr.) Quél., S. alcis var. austrobrasiliensis Cortez & R.M. Silveira, S. apiahyna (Speg.) Cortez & R.M. Silveira, S. araucariae Cortez & R.M. Silveira, S. coronilla (Bull.: Fr.) Quél., S. dorsipora Esteve-Rav. & Barrasa, S. earlei Norvell & Redhead, S. rugosoannulata Farl. ex Murrill, and S. semiglobata (Batsch: Fr.) Quél. The following taxa are described as new: Stropharia acanthocystis, S. araucariae and S. alcis var. austrobrasiliensis; the new combination for S. apiahyna is proposed; S. dorsipora, S. aeruginosa, and S. earlei are new records from South America, Brazil and Rio Grande do Sul State, respectively. Keys for identification, macro and microscopic descriptions and illustrations for all studied species are presente
The taxonomy of Echinochaete and Polyporus s. str. in southern South America
No full textTaxonomic characters of the genera Echinochaete and Polyporus s. str. from southern South America are summarized based on examination of 350 collections, including 88 holotypes from different herbaria. The research revealed one species of Echinochaete and nineteen species and one variety of Polyporus s. str. representing four established subgenera (Polyporus, Melanopus, Polyporellus, Favolus). and the new subgenus, Austropolyporus, proposed here to accommodate P. gayanus. Pseudofavolus is considered a synonym of Polyporus s. str. Polyporus arcularioides is accepted as a separate taxon. Polyporus brumalis was not found in the area studied. Polyporus saltensis, considered an autonomous taxon, differs from P. tenuiculus in lacking clamp connections. Polyporus tucumanensis is recognized as a separate species distinct from P. ciliatus. Polyporus maculatissimus, usually considered within Polyporus s. str., belongs in Neolentiporus.Fil:Borges Da Silveira, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
The taxonomy of Echinochaete and Polyporus s. str. in southern South America
No full textTaxonomic characters of the genera Echinochaete and Polyporus s. str. from southern South America are summarized based on examination of 350 collections, including 88 holotypes from different herbaria. The research revealed one species of Echinochaete and nineteen species and one variety of Polyporus s. str. representing four established subgenera (Polyporus, Melanopus, Polyporellus, Favolus). and the new subgenus, Austropolyporus, proposed here to accommodate P. gayanus. Pseudofavolus is considered a synonym of Polyporus s. str. Polyporus arcularioides is accepted as a separate taxon. Polyporus brumalis was not found in the area studied. Polyporus saltensis, considered an autonomous taxon, differs from P. tenuiculus in lacking clamp connections. Polyporus tucumanensis is recognized as a separate species distinct from P. ciliatus. Polyporus maculatissimus, usually considered within Polyporus s. str., belongs in Neolentiporus.Fil:Borges Da Silveira, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Author Correction: Global geochemical fingerprinting of plume intensity suggests coupling with the supercontinent cycle
No full textThe original version of this Article omitted from the author list the 4th and 5th authors, Grant Cox and Ross Mitchell, who were both at Curtin University. Consequently, the corrected version of the Acknowledgements removes the following from the original version: ‘and Ross Mitchell’. In addition, the following was added to the Author Contributions: ‘G.M.C. and R.M. were involved in an early attempt of this study.’. This has been corrected in both the PDF and HTML versions of the Article
Immunologic parameters evaluations in Nile tilapia (Oreochromis niloticus) exposed to sublethal concentrations of diazinon
No full textA Zn/Al layered double hydroxide was synthesized by alkaline co-precipitation with azelate ions (-OOC(CH2)7COO-). The interlayer space of the layered material is occupied by organic ions as confirmed by X-ray diffraction and FTIR spectroscopy. The resulting hybrid material was tested as support for Penicillium camemberti enzymatic extract, containing lipoxygenase (LOX) activity. The optimal condition for LOX immobilization is done with 0.6 mol L-1 potassium phosphate buffer and pH 6.0. The affinity for the substrate is the same after immobilization, however the specific activity slightly decreases. The immobilization enhanced the thermal stability, which was evident with incubation at 60 °C where the immobilized enzyme retains 68% of specific activity while the free enzyme is inhibited. Recycling assays showed that after eight reaction cycles, the immobilized enzyme retains 60% of the activity. " 2009 Elsevier B.V. All rights reserved.",,,,,,"10.1016/j.bej.2009.08.011",,,"http://hdl.handle.net/20.500.12104/42070","http://www.scopus.com/inward/record.url?eid=2-s2.0-72149096269&partnerID=40&md5=72f4abd7c7a97245bdbc5c6741280b9a",,,,,,"1",,"Biochemical Engineering Journal",,"9
Immobilization of enzymatic extract from Penicillium camemberti with lipoxygenase activity onto a hybrid layered double hydroxide
No full textA Zn/Al layered double hydroxide was synthesized by alkaline co-precipitation with azelate ions (-OOC(CH2)7COO-). The interlayer space of the layered material is occupied by organic ions as confirmed by X-ray diffraction and FTIR spectroscopy. The resulting hybrid material was tested as support for Penicillium camemberti enzymatic extract, containing lipoxygenase (LOX) activity. The optimal condition for LOX immobilization is done with 0.6 mol L-1 potassium phosphate buffer and pH 6.0. The affinity for the substrate is the same after immobilization, however the specific activity slightly decreases. The immobilization enhanced the thermal stability, which was evident with incubation at 60 °C where the immobilized enzyme retains 68% of specific activity while the free enzyme is inhibited. Recycling assays showed that after eight reaction cycles, the immobilized enzyme retains 60% of the activity. © 2009 Elsevier B.V. All rights reserved
Colonising "The Coral Island": A Postcolonial Reading of R.M. Ballantyne's Children's "Classic"
No full textstudent essayBeing written during the rise of the British Empire in the 1850sm R.M. Ballantyne's boys' adventure story "The Coral Island" is in many ways a product of its time, conveying imperial ideas and Victorian values to the young reader. Through his portrayal of the native inhabitants in relation to his descriptions of the three British protagonists, the author creates a stereotyped image of the natives as primitive savages. Due to the further use of a first person narrator and realist pretensions, the dated racist ideas become influential upon the reader. In spite of the fact that the novel has been considered as an entertaining children's classic by generations since its first publication, "The Coral Island" should not be classified as good children's literature today but should rather be historicised as a result of its controversial contents. By adopting a postcolonial approach and applying postcolonial theory in my analysis of R.M. Ballantyne's "The Coral Island", I have in this essay endeavoured to demonstrate in what ways the novel would prove problematic as a children's book today. In my first chapter I present the imperial ideas and Victorian values that are conveyed, whereas in my second chapter I discuss Ballantyne's stereotyping of the natives. As a result of my study of this novel, I have exemplified how the author portrays the three British boys as representative of the Victorian ideals of the time. I have also illustrated their assumed superiority over nature and their roles as colonisers. Furthermore, my analysis of "The Coral Island" has revealed how Ballantyne communicates both white superiority as well as the Western "oblibation" to civilise primitive people throug Christian conversion. Consequently, the novel promotes the ideology of its time. As a result of my findings, I would like to argue that "The Coral Island" should today be viewed as a text conveying historical ideas and values rather than as an exciting children's classic
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