324,245 research outputs found
Escola Estadual Valentim Berto: da cria??o ? nuclea??o.
No full textThis work is a historical research about Public Schools Primary and Rural Multiseriated Unidocentes, having as object of study the Valentim Berto School, currently belonging to the municipality of Ponte Preta - RS. The methodology refers to documentary research in educational standards, school documents object of study, as well as analysis of relevant literature on the subject. In addition to these procedures, we have an interview with a former teacher of the institution, who worked at the school for the entire period of operation of the same. The primary objective of the research refers to research and discuss public policies for Rural Education that allowed the creation of rural schools, their nucleation and subsequent extinction of the establishment. Sought throughout the study discuss the historical context in which it arises Valentim Berto School , showing characteristics for the period it has been in operation and discuss the historical context of the time it ended its activities. To answer such questions, consult some documents of the Brazilian Educational Legislation; then undertook a study of the 1950 what it refers to rural education , and the establishment of schools in rural areas; later, we are dedicated to research on the emergence, operation and closure of Valentim Berto School in the documents of the institution as well as the interview. Finally, we look at the school nucleation occurred from 1970 process and we suggest as a proposal for the rural population the paradigm of rural education. From the study, we realized that the rural public primary education was relegated to the ashes of the educational project for a long period and, when implemented, was geared to urban and industrial development project in the country. Regarding School Valentim Berto, could ratify the hypothesis of whether it is an institution created by the project of ?Brizoletas? the governor Leonel de Moura Brizola, who after 31 years of operation, was closed due to public policies nucleation of rural schools.Este trabalho trata de uma pesquisa hist?rica a cerca das Escolas P?blicas Prim?rias Rurais Multisseriadas e Unidocentes, tendo como objeto de estudo a Escola Valentim Berto, pertencente atualmente ao munic?pio de Ponte Preta ? RS. A metodologia utilizada se refere ? pesquisa documental em normas educacionais, documentos da escola objeto de estudo, assim como, a an?lise de bibliografia especializada no assunto. Aliado a estes procedimentos, contamos com uma entrevista realizada com um ex-professor da institui??o, que atuou na escola durante todo o per?odo de funcionamento da mesma. O objetivo primordial da pesquisa se refere a investigar e discutir as pol?ticas p?blicas de Educa??o Rural que permitiram a cria??o das escolas rurais, sua nuclea??o e posteriormente a extin??o do estabelecimento. Buscamos ao longo do estudo discutir o contexto hist?rico no qual surge a Escola Valentim Berto, evidenciando caracter?sticas referentes ao per?odo em que esteve em funcionamento e, discutir a conjuntura hist?rica do momento em que encerrou suas atividades. Para atender tais questionamentos, consultamos alguns documentos da Legisla??o Educacional Brasileira; em seguida empreendemos um estudo acerca dos anos de 1950 ao que se refere ? educa??o rural e, a cria??o de escolas no meio rural; posteriormente, dedicamo-nos ? pesquisa do surgimento, funcionamento e fechamento da Escola Valentim Berto nos documentos da institui??o, bem como a entrevista realizada. Por fim, atentamos ao processo de nuclea??o escolar ocorrido a partir de 1970 e, sugerimos como proposta para a popula??o rural o paradigma da educa??o do campo. A partir do estudo realizado, percebemos que a educa??o p?blica prim?ria rural foi relegada as cinzas do projeto educacional por um longo per?odo e, quando implementada, esteve voltada ao projeto urbano e industrial de desenvolvimento do pa?s. Em rela??o ? Escola Valentim Berto, foi poss?vel ratificar a hip?tese de se tratar de uma institui??o criada pelo projeto das ?Brizoletas? do governador Leonel de Moura Brizola, que ap?s 31 anos de funcionamento, foi fechada devido ?s pol?ticas p?blicas de nuclea??o de escolas rurais
Fibras de vidro a base de Li20 - Zr02 - BaO - Si02 recobertas com Nb205 para utilização em micro-extração em fase sólida
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-graduação em QuímicaNeste trabalho são descritas as metodologias para obtenção e modificações da superfície de fibras de vidro de composição Li2O-ZrO2-BaO-SiO2. Apresenta-se também as aplicações destas fibras na determinação, por SPME, de fenol e de uma mistura de álcoois. Para obtenção das fibras de vidro construiu-se um equipamento, o qual baseia-se na técnica de estiramento. As fibras de vidro foram recobertas utilizando-se duas técnicas: Decomposição de Organometálicos, onde o etóxido de nióbio (V) foi empregado como reagente precursor do óxido de nióbio (V), e Deposição de Vapor Químico, na qual fez-se uso do cloreto de nióbio como precursor do óxido de nióbio (V).Utilizou-se da técnica de Microscopia Eletrônica de Varredura para avaliar a morfologia das fibras sem recobrimento e recobertas. O recobrimento com óxido de nióbio sobre a superfície das fibras foi estudado pela técnica de "Color Map" e as análises químicas realizadas pela Microssonda de Energia Dispersiva, ambas as técnica acopladas ao MEV. A Técnica de Micro-extração em Fase Sólida foi utilizada para avaliar a capacidade de adsorsão de compostos polares e apolares pelas fibras recobertas. Com os resultados obtidos, verficou-se que pela técnica de CVD obtem-se fibras com um recobrimento mais homogêneo e espesso. Estas fibras apresentaram melhor eficiência no processo de adsorção como verificado pelos resultados cromatográficos
Singolarita fuori-piano indotte da effetti tridimensionali in prevalente modo 2
No full textIn the application of the Strain Energy Density (SED) approach for fatigue strength assessments of welded joints a well-defined control volume is considered. This volume surrounds the weld root or weld toe, both modelled like sharp (zero radius) V-notches with different opening angles. The volume becomes a circular sector under plane strain conditions, with the radius being about 0.3 mm for welded joints made of structural steel. The mean value of the SED mainly depends on the singular stress fields when the main plate thickness is large enough, whereas the influence of the T-stress component cannot be neglected in the case of thin-walled welded joints. Both contributions are directly accounted for by using finite element models, also when the relevant meshes are quite coarse. This fact makes the application of the SED approach easier than any stress-based approach in the case of complex structures. Due to three-dimensional effects, a non conventional out-of-plane singular mode can be present, in addition to mode I and mode II stress singularities according to Williams’ solution. This out-of-plane mode, which has recently been presented by Kotousov, is discussed here with reference to welded (seam) lap joints under tensileshear loads.P. Lazzarin, F. Berto, A. Kotousov and S. Hardin
The utopian spacialization in Al Berto and João Gilberto Noll
No full textEste artigo desenvolve uma reflexão acerca das espacializações utópicas dos personagensnas obras de Al Berto (1948-1997) e de João Gilberto Noll (1946). Para tanto, a análise recai sobre todos os romances do autor brasileiro, em determinado momento o foco incide em "Lorde", e nas obras do lusitano em que há maior figuração de personagens, a exemplo de "Lunário".This paper develops a reflection about the utopian spacializations of the characters in Al Berto´s (1948-1997) and João Gilberto Noll´s (1946) works. In this sense, the analysis focuses on all the Brazilian author´s novels, especially on Lorde, and on the Portuguese writer´s works with a more complex characters figuration, such as Lunário
Isospora ramphoceli Berto, Flausino, Luz, Ferreira & Lopes, 2010, n. sp.
No full text<i>Isospora ramphoceli</i> n. sp. <p> <b>Type host:</b> Brazilian tanager <i>Ramphocelus bresilius dorsalis</i> Sclater, 1855 (Aves: Passeriformes: Thraupidae).</p> <p> <b>Type locality:</b> Marambaia Island (23°04’S, 43°53’W), Rio de Janeiro, Brazil.</p> <p> <b>Site of infection:</b> Not investigated.</p> <p> <b>Type-material:</b> One-half of the oocysts were kept in 10% aqueous buffered formalin (v/v) and the other half in 70% ethanol according Duszynski & Gardner (1991). Both samples were deposited in the Parasitology Collection, in the Department of Animal Parasitology, at UFRRJ, located in Seropédica, Rio de Janeiro, Brazil. Phototypes and line drawings were deposited as well. The repository number is P-36/2009.</p> <p> <b>Etymology:</b> The specific epithet is derived from the generic name of the type host.</p> <p> <b>Description</b> (Figs 1 a–c; 2a–c)</p> <p> Oocyst shape (n = 41) spherical to sub-spherical; oocyst wall bilayered; wall thickness 1.2 (1–1.5); outer wall smooth, <i>c.</i> 2/3 of total thickness; L × W = 23.7 × 22.8 (22–26 × 21–24), L/W ratio = 1.0 (1.0–1.1); M, PG and OR: absent. Sporocyst shape (n = 41) ellipsoidal or slightly ovoidal; L × W = 16.0 × 11.4 (14–18 × 10– 13); L/W ratio = 1.4 (1.3–1.6); SB present, knob-like, prominent, 1.0 high × 2.0 wide; SSB present, large, homogeneous, 2.5 high <i>×</i> 4.0 wide; PSB absent; SR present, composed of granules of different sizes; SZ vermiform with 1 posterior SRB and centrally located N.</p> <p> <b>Remarks.</b> <i>Isospora ramphoceli</i> differs from other <i>Isospora</i> species from the same host (Table 1). In <i>I. andesensis</i> Templar, McQuistion & Capparella, 2004, <i>I. iridosornisi</i> Metzelaars, Spaargaren, McQuistion & Capparella, 2005, <i>I. sepetibensis</i> Berto, Flausino, Luz, Ferreira & Lopes, 2008 and <i>I. silvasouzai</i> Berto, Balthazar, Flausino & Lopes, 2009 all lack PG (Templar <i>et al.</i> 2004; Metzelaars <i>et al.</i> 2005; Berto <i>et al.</i> 2008; 2009b).</p> <p> <i>Isospora thraupis</i> Lainson, 1994, <i>I. marambaiensis</i> Berto, Flausino, Luz, Ferreira & Lopes, 2008, and <i>I. navarroi</i> Berto, Flausino, Luz, Ferreira & Lopes, 2009 have smaller SSB; <i>I. cadimi</i> Berto, Flausino, Luz, Ferreira & Lopes, 2009 has compartments within SSB; whereas in <i>I. ramphoceli</i> this structure is large and homogeneous (Table 1) (Lainson 1994; Berto <i>et al.</i> 2008; 2009a).</p> <p> Finally, <i>I.</i> tiesangui Berto, Flausino, Luz, Ferreira & Lopes, 2008, <i>I. sanhaci</i> Berto, Balthazar, Flausino & Lopes, 2009 and <i>I. sayacae</i> Berto, Balthazar, Flausino & Lopes 2009, all have a flattened SB, an elongated sporocyst and the SB is nipplelike (Berto <i>et al</i>. 2008; 2009 b). In <i>I. ramphoceli</i> the SB is knob-like and sporocysts are ellipsoidal or slightly ovoidal.</p>Published as part of <i>Berto, Bruno Pereira, Flausino, Walter, Luz, Hermes Ribeiro, Ferreira, Ildemar & Lopes, Carlos Wilson Gomes, 2010, Isospora ramphoceli n. sp. (Apicomplexa: Eimeriidae) from the Brazilian tanager (Aves: Passeriformes: Thraupidae) Ramphocelus bresilius dorsalis Sclater, 1855, pp. 57-62 in Zootaxa 2650</i> on pages 58-59, DOI: <a href="http://zenodo.org/record/198813">10.5281/zenodo.198813</a>
Energy TCD - robust and simple failure prediction unifying the TCD and ASED criterion
No full textRobust and simple failure prediction is a relevant and active field of research. The present work aims at unifying the Theory of Critical Distances (TCD) and Averaged Strain Energy Density (ASED) criterion. The proposed Energy TCD is formulated along with analytical expressions for the characteristic length scales and validated using experimental data. On this data set, the accuracy of the Energy TCD is similar to that of the classical methods. Most importantly, the presented methods allow to transfer the point-based calibration technique from notched specimens, which is common for the TCD, to the Energy TCD ASED criterion. © 2022 The Author(s
Recent developments on multiaxial fatigue strength of titanium alloys
No full textThe present paper investigates the multiaxial fatigue strength of sharp V-notched components made of
titanium grade 5 alloy (Ti-6Al-4V). Axisymmetric notched specimens have been tested under combined
tension and torsion fatigue loadings, both proportional and non-proportional, taking into account different
nominal load ratios (R = -1 and 0). All tested samples have a notch root radius about equal to 0.1 mm, a
notch depth of 6 mm and an opening angle of 90 degrees. The fatigue results obtained by applying
multiaxial loadings are discussed together with those related to pure tension and pure torsion experimental
fatigue tests, carried out on both smooth and notched specimens at load ratios R ranging between -3 and 0.5.
Altogether, more than 250 fatigue results (19 S-N curves) are examined, first on the basis of nominal stress
amplitudes referred to the net area and secondly by means of the strain energy density averaged over a
control volume embracing the V-notch tip. The effect of the loading mode on the control volume size has
been analysed, highlighting a wide difference in the notch sensitivity of the considered material under
tension and torsion loadings. Accordingly, the control radius of the considered titanium alloy (Ti-6Al-4V)
is found to be strongly affected by the loading mode
"OLD AND LOW-COST SENSOR" FOR MICROPHOTOGRAMMETRY. CASE STUDY: THE EMPEROR MAXIMIANUS HERCULEUS' MEDALLION AT THE CORRER MUSEUM (VENICE)
No full textThe microphotogrammetric survey of the roman emperor Maximianus Herculeus’ medallion, described in this report, demonstrated that, despite the use of an “old” and, nowadays, “low cost” camera sensor it is still possible to obtain a detailed 3D textured model useful for different scientific purposes and virtual enhancement. Here are presented the photogrammetric results reached with the selection of the best solutions in terms of number of images, in order to speed up the entire photogrammetric workflow and pursue the goals previously explained. This medallion is one of the most important examples of roman medallions which belongs to the numismatic collection stored at the Correr Museum in Venice. Its 3D survey was developed as a parallel step of a main project which aims to acquire in three-dimensions, with a structured light scanner, the complete roman collection of medallions. This digitization project proposes to record the volumetric information of these small archaeological remains and to realize an online virtual gallery in the web site of the museum (using 3DHOP, an open source web viewer developed by the Visual Computing Lab of the CNR-ISTI of Pisa). At the end of the microphotogrammetric workflow, a distance analysis was computed to highlight the differences between the meshes obtained with a photogrammetric approach and a structured light scanner
Isospora coerebae Berto, Flausino, Luz, Ferreira and Lopes 2010
No full textIsospora coerebae Berto, Flausino, Luz, Ferreira and Lopes, 2010 Host: Bananaquit Coereba flaveola (Linnaeus, 1758) (Passeriformes: Thraupidae: Coerebinae) Locality: Private Natural Heritage Reserve of Porangaba (22°48’29.83’’S; 43°49’38.77’’W), Municipality of Itaguaí, State of Rio de Janeiro, Southeastern Brazil. Specimens: Photomicrographs are deposited and available (http://r1.ufrrj.br/labicoc/colecao.html) in the Parasitology Collection of the Laboratório de Biologia de Coccídios, at UFRRJ, under repository number 115/2021. Photovouchers of the host specimens are deposited in the same collection. Representative DNA sequence: DNA amplification of the COI1 and COI2 genic regions showed clear bands around ~250 bp and ~650 bp, respectively. Representative sequences were deposited in the GenBank database under the accession numbers: OK194671 (COI1); and OK194672 (COI2). Site of infection: Unknown. Prevalence: 100% (1/1). Sporulation: Exogenous. All oocysts were passed in the feces unsporulated and were fully sporulated by day 7 in K 2 Cr 2 O 7 solution at room temperature (20–25°C). Morphology (Fig 1 A-F): Oocyst (n = 15) sub-spherical, 22−27 × 22−25 (24.4 × 22.9); length/width (L/W) ratio 1.0−1.1 (1.07). Wall bi-layered, smooth outer wall about 2/3 total thickness, 1.5−1.8 (1.7). Micropyle, polar granules and oocyst residuum absent. Sporocyst elongate ovoidal, 16−19 × 10−11 (17.6 × 10.5); L/W ratio 1.6−1.8 (1.67). Stieda body present, prominent and rounded, 1.3−1.5 × 1.9−2.3 (1.4 × 2.1). Sub-Stieda body present, short and wide, 1.0−1.6 × 3.1−3.7 (1.3 × 3.5). Para-Stieda body absent. Crystalloid body sometimes present in the center of the sporocyst. Sporocyst residuum present, composed of many scattered granules of different sizes. Sporozoites vermiform, with a prominent posterior refractile body. Remarks: The oocysts recovered from the bananaquit in the current work are morphologically equivalent to the original description of I. coerebae, which have a typical and easily identifiable morphology, mainly in the Stieda and Sub-Stieda bodies (Berto et al. 2010). Table 1 compares the morphology and morphometry of the oocysts from the current work with those from the original description of I. coerebae. The typical morphology of the Stieda and Sub-Stieda bodies of I. coerebae are the basis of differentiation from another congeneric species, Isospora cagasebi Berto, Flausino, Luz, Ferreira and Lopes, 2008, which has the same host- and locality-types: C. flaveola in the Marambaia Island (Berto et al. 2008) (Table 1). However, in the current work no oocyst of I. cagasebi was observed, which, despite being similar in some characteristic features to I. coerebae, their sporocysts have knob-like Stieda body and prominent Sub-Stieda body, while I. coerebae has rounded Stieda body and short and wide Sub-Stieda body (Berto et al. 2010). Phylogenetic analysis: Phylogenetic analysis included sequences from coccidians available in GenBank (Figs. 2; 3). Toxoplasma gondii (Nicolle and Manceaux, 1908) was used as the outgroup. In the phylogenetic analysis based on the COI1 gene (Fig. 2), I. coerebae was recovered in a clade with the highest similarity of 99% with Isospora sepetibensis Berto, Flausino, Luz, Ferreira and Lopes, 2008 from black-goggled tanagers Trichothraupis melanops (Vieillot, 1818) of the Itatiaia National Park, which is located in the mountainous region in the interior of Southeastern Brazil. In the COI2 based phylogenetic analysis (Fig. 3), I. coerebae sat in a large clade with Isospora spp. from passerines of North America, Europe and Asia, with the highest similarity of 98% with Isospora greineri Hafeez, Stasiak, Delnatte, El-Sherry, Smith and Barta, 2014 from superb starlings Lamprotornis superbus Rüppell, 1845 at the Toronto Zoo, Toronto, Canada.Published as part of Ortúzar-Ferreira, Carlos Nei, Andrade, Lucas De Assis S., Genovezoliveira, Jhon Lennon, Oliveira, Mariana S., Mello, Ericson R., Cardozo, Sergian V., Oliveira, Águida A., Lima, Viviane M., Ferreira, Ildemar & Berto, Bruno P., 2022, Molecular identification of Isospora coerebae Berto, Flausino, Luz, Ferreira & Lopes, 2010 (Chromista: Miozoa: Eimeriidae) from the bananaquit Coereba flaveola (Linnaeus, 1758) (Passeriformes: Thraupidae: Coerebinae) from Brazil, pp. 83-91 in Zootaxa 5168 (1) on pages 85-86, DOI: 10.11646/zootaxa.5168.1.7, http://zenodo.org/record/687692
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