941 resultados para observing
Resumo:
The Independence of Brazil was proclaimed in September 1822 after two years during which constituent deputies elected on both sides of the Atlantic and gathered in Lisbon endeavoured to achieve unification with the former Portuguese metropoli. Due to the failure of these attempts a Constituent Assembly settled in independent Brazil in July 1823. Those two parlamentary experiences - the first to take place in the Portuguese dominions - were strongly influenced by the decisions adopted in Cadiz (1810-1814), and in Madrid (1820-1823), and by the independentist processes developed at the time in Spanish America. This work aims at observing that influence on the decisions adopted in Lisbon and Rio de Janeiro vis-a-vis the autonomical reivindications of several Brazilian provinces.
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The identification of genes responsible for the rare cases of familial leukemia may afford insight into the mechanism underlying the more common sporadic occurrences. Here we test a single family with 11 relevant meioses transmitting autosomal dominant acute myelogenous leukemia (AML) and myelodysplasia for linkage to three potential candidate loci. In a different family with inherited AML, linkage to chromosome 21q22.1-22.2 was recently reported; we exclude linkage to 21q22.1-22.2, demonstrating that familial AML is a heterogeneous disease. After reviewing familial leukemia and observing anticipation in the form of a declining age of onset with each generation, we had proposed 9p21-22 and 16q22 as additional candidate loci. Whereas linkage to 9p21-22 can be excluded, the finding of a maximum two-point LOD score of 2.82 with the microsatellite marker D16S522 at a recombination fraction theta = 0 provides evidence supporting linkage to 16q22. Haplotype analysis reveals a 23.5-cM (17.9-Mb) commonly inherited region among all affected family members extending from D16S451 to D1GS289, In order to extract maximum linkage information with missing individuals, incomplete informativeness with individual markers in this interval, and possible deviance from strict autosomal dominant inheritance, we performed nonparametric linkage analysis (NPL) and found a maximum NPL statistic corresponding to a P-value of .00098, close to the maximum conditional probability of linkage expected for a pedigree with this structure. Mutational analysis in this region specifically excludes expansion of the AT-rich minisatellite repeat FRA16B fragile site and the CAG trinucleotide repeat in the E2F-4 transcription factor. The ''repeat expansion detection'' method, capable of detecting dynamic mutation associated with anticipation, more generally excludes large CAG repeat expansion as a cause of leukemia in this family.
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Our study aims to investigate changes in electrocortical activity by observing the variations in absolute theta power in the primary somatomotor and parietal regions of the brain under three different electrical stimulation conditions: control group (without stimulation), group 24 (24 trials of stimulation) and group 36 (36 trials of stimulation). Thus, our hypothesis is that the application of different patterns of electrical stimulation will promote different states of habituation in these regions. The sample was composed of 24 healthy (absence of mental and physical impairments) students (14 male and 10 female), with ages varying from 25 to 40 years old (32.5 +/- 7.5), who are right-handed (Edinburgh Inventory). The subjects were randomly distributed into three groups: control (n = 8), G24 (n = 8) and G36 (n = 8). We use the Functional electrical stimulation (FES) equipment (NeuroCompact-2462) to stimulate the right index finger extensor muscle, while the electroencephalographic signal was simultaneously recorded. We found an interaction between condition and block factors for the C3 and P3 electrode, a condition and block main effects for the C4 electrode, and a condition main effect for the P4 electrode. Our results support the hypothesis that electrical stimulation promotes neurophysiological changes. It appears that stimulus adaptation (accommodation) of specific circuits can strengthen the brain`s ability to distinguish between and respond to such stimuli over time. (C) 2009 Elsevier Ireland Ltd. All rights reserved.
Resumo:
Marsh deer (Blastocerus dichotomus) is one of the most exposed large mammals in South America. To aid in the conservation management of the species, nine polymorphic microsatellite loci were isolated and tested on up to 50 animals, showing 3-12 alleles and expected heterozygosity values varying from 0.69 to 0.89. These markers should be of considerable utility in future population and ecological genetics studies of this species. The marsh deer (Blastocerus dichotomus) is the biggest South American species of deer. Originally distributed across a large part of South America, stretching from the south bank of the Amazon river to northern Argentina, significant wild populations are now restricted to the Pantanal, swamplands that cover about 40% of southwest Brazil. The marsh deer is listed as Vulnerable on the Red List of the IUCN. Three populations of the species from three areas in the Parana River basin (between the states of Sao Paulo and Mato Grosso do Sul) were recently studied by observing protein polymorphism at 17 loci (Oliveira et al. 2005). Now we are presenting data about isolation of microsatellite markers to improve the results regarding population structure.
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Objectives. To compare pelvic floor muscle (PFM) strength between women undergoing vaginal delivery, cesarean section, and nulliparae, investigating the factors associated with PFM strength, and observing the correlation between vaginal digital palpation and use of a perineometer. Methods. A cross-sectional study was conducted, including 31 women following vaginal delivery, 30 women following cesarean section, and 30 nulliparous women. PFM strength was measured by vaginal digital palpation and use of a perineometer. Multiple linear regression analysis with adjustment for covariables was used to compare the mean PFM strength and identify its associated factors. Results. The mean PFM strength of women undergoing vaginal delivery and cesarean section was 25.6 +/- 14.5 cmH(2)O and 39.6 +/- 22.0 cmH(2)O (p < 0.01, adjusted for covariables), respectively. A correlation was observed between measurements of PFM strength obtained by vaginal digital palpation and use of a perineometer (tau = 0.82; p < 0.01). The non-white race/ethnicity was negatively associated with PFM strength (coefficient: -10.2424; p = 0.02). Conclusions. A lower PFM strength was observed in women with a history of vaginal delivery compared to those undergoing cesarean section. Non-white race/ethnicity negatively affected PFM strength. Our data suggest that vaginal digital palpation may be used in clinical practice because of its expressive correlation with use of a perineometer.
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This study examines in vitro steroid sensitivity in chronic renal failure ( CRF) patients and its influence on the allograft outcome. We determined the inhibitory effect of dexamethasone ( DEX) on concanavalin A ( Con-A)-stimulated peripheral blood mononuclear cell ( PBMC) proliferation, and glucocorticoid receptor` ( GR) number of binding sites ( B-max) and affinity ( K-d) in 28 CRF patients and 40 normal healthy controls. Based on K-d values > 95th percentile from controls, patients were divided into two groups: glucocorticoid resistant ( n = 11) and glucocorticoid sensitive ( n = 17). Patients were followed during 18 months post-transplantation observing acute rejection episodes ( ARE), chronic allograft nephropathy ( CAN), allograft failure and death. The DEX concentration that caused 50% inhibition of Con-A-stimulated PBMC proliferation ( IC50) was higher in CRF than in healthy controls ( 2.2 x 10(-5) +/- 1.0 x 10(-5) versus 8.3 x 10(-6) +/- 4.2 x 10(-6) mol/ L, P = 0.02). Values of Kd ( 12.4 +/- 1.8 versus 7.2 +/- 0.9 nM) and Bmax ( 7.7 +/- 1.1 versus 4.1 +/- 0.3 fmol/ mg protein) were higher in CRF patients ( P = 0.02 and P = 0.001, respectively). There were higher incidences of ARE ( P = 0.02) and CAN ( P = 0.002) in the glucocorticoid-resistant group. Univariate and multivariate logistic regression showed that Kd was an independent predictor of ARE ( OR 8.8, P= 0.03) aswell as of CAN ( OR 16.5, P= 0.01). In conclusion, we observed glucocorticoid resistance in a subgroup of CRF patients undergoing dialysis, which led to a higher morbidity due to ARE and CAN in an 18-month follow-up period.
Resumo:
Aggression by cats towards humans is a serious behavioural, welfare and public health problem, although owners may believe it is an inevitable part of cat ownership. There has been little scientific investigation of the risk factors associated with this problem. One hundred and seven owners in the Sao Paulo region of Brazil, took part in a survey aimed at investigating the perceived prevalence of the problem, defining the most common contexts of human directed aggression and identifying associated potential risk factors. Human directed aggression occurred in 49.5%, of cats and was most commonly associated with situations involving petting and play, followed by protection of a resource, when startled, when observing an unfamiliar animal and least commonly when unfamiliar people were present. Pedigree status, neuter status, a history of early trauma, sensitivity to being stroked, the absence of other cats in the home, relationship with other animals, level of background activity at home, access to the outside and tendency to be alone (meaning tendency to staying far from the family members) were all associated with an increased risk in one or more context. However, sex, age, age when acquired, source of pet, attachment to a specific household member, type of domestic accommodation, relationship with another cat if present and contact with other animals did not appear to increase the risk. The results suggest sensitivity to being stroked and background levels of stress in the home are the most pervasive risk factors, and future research should aim to investigate these factors further. These data are of relevance when advising owners about the risk and development of this problem. (C) 2009 ESFM and AAFP. Published by Elsevier Ltd. All rights reserved.
Resumo:
Causes of dental infections can be related to failed dental eruption, malocclusion, abrasion, fractures with or without exposure of the dental pulp, and periodontal disease. Reports of oral myiasis in megavertebrates in captivity air infrequent, perhaps due to the difficulty in observing the oral cavity in such species. This report describes a case of oral myiasis in an adult male hippopotamus in the gingival area and alveolar mucosa of the left mandibular canine tooth. J Vet Dent 26 (3); 168 170,2009
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We investigate the theory of quantum fluctuations in non-equilibrium systems having large critical fluctuations. This allows us to treat the limits imposed by nonlinearities to quantum squeezing and noise reduction, and also to envisage future tests of quantum theory in regions of macroscopic quantum fluctuations. A long-term objective of this research is to identify suitable physical systems in which macroscopic 'Schrodinger cat'-like behaviour may be observed. We investigate two systems in particular of much current experimental interest, namely the degenerate parametric oscillator near threshold, and the evaporatively cooled (BEC). We compare the results obtained in the positive-P representation, as a fully quantum mechanical calculation, with the truncated Wigner phase space equation, also known as semi-classical theory. We show when these results agree and differ in calculations taken beyond the linearized approximation. In the region where the largest quantum fluctuations and Schrodinger cat-like behaviour might be expected, we find that the quantum predictions correspond very closely to the semi-classical theory. Nature abhors observing a Schrodinger car.
Resumo:
Workflow technology provides a suitable platform to define and manage the coordination of business process activities. We introduce a flexible e-learning environment – called Flex-eL – that has been built upon workflow technology. The workflow functionality of Flex-eL manages the coordination of learning and assessment activities of the course process between students and teaching staff. It provides a unique environment for teachers to design and develop process-centric courses and to monitor student progress. It allows students to learn at their own pace while observing the learning guidelines and checkpoints modeled into the course process by teaching staff. We also report on the successful deployment of the concept and system for university courses and our experiences from the implementation.
Resumo:
We investigate the absorption and dispersion properties of a two-level atom driven by a polychromatic field. The driving field is composed of a strong resonant (carrier) frequency component and a large number of symmetrically detuned sideband fields (modulators). A rapid increase in the absorption at the central frequency and the collapse of the response of the system from multiple frequencies to a single frequency are predicted to occur when the Rabi frequency of the modulating fields is equal to the Rabi frequency of the carrier field. These are manifestations of the undressing or a disentanglement of the atomic and driving field states, that leads to a collapse of the atom to its ground state. Our calculation permits consideration of the question of the undressing of the driven atom by a multiple-modulated field and the predicted spectra offer a method of observing undressing. Moreover, we find that the absorption and dispersion spectra split into multiplets whose structures depend on the Rabi frequency of the modulating fields. The spectral features can jump between different resonance frequencies by changing the Rabi frequency of the modulating fields or their initial phases, which can have potential applications as a quantum frequency filter.
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O artigo aborda a contribui????o de tr??s diferentes perspectivas te??ricas ??? o institucionalismo da economia pol??tica (IEP), o institucionalismo da escolha racional (IER) e o institucionalismo da sociologia (IS) ??? para a compreens??o dos desdobramentos da organiza????o estatal e das pol??ticas de reforma do aparelho do Estado. Tais perspectivas s??o complementares ou excludentes, mas cada uma oferece explica????es diferentes sobre atores, prefer??ncias e dificuldades a serem enfrentadas. O texto explica algumas das hip??teses sobre reforma do Estado, contidas em cada perspectiva, observando as suas vantagens e limita????es, e fornece tamb??m uma avalia????o preliminar da relev??ncia te??rica de cada uma para a pesquisa emp??rica na Am??rica Latina e Europa Oriental.
Resumo:
Esta pesquisa teve como objetivo compreender as ações pedagógicas constituídas por uma unidade municipal de ensino de Vitória/ES, visando ao processo de inclusão escolar de uma criança com Síndrome de Asperger no contexto da Educação Infantil. Contou com as contribuições teóricas dos estudos da matriz histórico-cultural e de autores dedicados a estudar a infância, como Kramer, Sarmento, Aries, dentre outros, bem como de pesquisadores interessados em investigar os pressupostos da Educação Especial em uma perspectiva inclusiva. Como aporte teórico-metodológico, apoiou-se no estudo de caso do tipo etnográfico que advoga pela possibilidade de, por meio da pesquisa científica, produzir conhecimento sobre a realidade social. O trabalho de pesquisa foi realizado em uma unidade municipal de Educação Infantil de Vitória/ES, envolvendo uma criança com Síndrome de Asperger, professores, pedagogos, dirigente escolar e responsável pelo estudante investigado. O processo de coleta de dados se efetivou no período de março de 2013 a setembro de 2013. O pesquisador esteve de uma a duas vezes por semana no campo de pesquisa, participando das observações em sala de aula, em espaços para planejamento e formação continuada e também observando momentos informais na entrada, recreio e saída dos alunos. Para a organização do estudo, trabalhou com quatro eixos: a) ações implementadas em favor do processo de inclusão escolar de alunos com Síndrome de Asperger no contexto da Educação Infantil; b) proposta pedagógica do CMEI “Alegria da Cinderela”: espaços de planejamento, formação e utilização dos apoios pedagógicos para a inclusão escolar; c) concepções dos profissionais envolvidos na pesquisa e da família sobre a inclusão escolar da criança com Síndrome de Asperger; d) principais possibilidades e/ou dificuldades encontradas pela unidade de ensino mediante o processo de ensino-aprendizagem da criança com Síndrome de Asperger. Como resultados, a pesquisa aponta: a importância de pensar nessas crianças como sujeitos de direitos e capazes de aprender; a necessidade de investimentos na formação inicial e continuada de professores para que os estudantes tenham maiores possibilidades de aprender; a urgência de o professor assumir a inclusão escolar como um movimento ético comprometido com a formação e com o reconhecimento da diversidade/diferença humana; a necessidade de reconhecer o cotidiano da Educação Infantil como um rico espaço para todas as crianças se desenvolverem e produzirem conhecimentos com seus pares e por meio das mediações pedagógicas dos professores.
Resumo:
A literatura internacional que analisa os fatores impactantes das transações com partes relacionadas concentra-se no Reino Unido, nos EUA e no continente asiático, sendo o Brasil um ambiente pouco investigado. Esta pesquisa tem por objetivo investigar tanto os fatores impactantes dos contratos com partes relacionadas, quanto o impacto dessas transações no desempenho das empresas brasileiras. Estudos recentes que investigaram as determinantes das transações com partes relacionadas (TPRs), assim como seus impactos no desempenho das empresas, levaram em consideração as vertentes apresentadas por Gordon, Henry e Palia (2004): (a) de conflitos de interesses, as quais apoiam a visão de que as TPRs são danosas para os acionistas minoritários, implicando expropriação da riqueza deles, por parte dos controladores (acionistas majoritários); e (b) transações eficientes que podem ser benéficas às empresas, atendendo, desse modo, aos objetivos econômicos subjacentes delas. Esta pesquisa apoia-se na vertente de conflito de interesses, com base na teoria da agência e no fato de que o cenário brasileiro apresenta ter como característica uma estrutura de propriedade concentrada e ser um país emergente com ambiente legal caracterizado pela baixa proteção aos acionistas minoritários. Para operacionalizar a pesquisa, utilizou-se uma amostra inicial composta de 70 empresas com ações listadas na BM&FBovespa, observando o período de 2010 a 2012. Os contratos relacionados foram identificados e quantificados de duas formas, de acordo com a metodologia aplicada por Kohlbeck e Mayhew (2004; 2010) e Silveira, Prado e Sasso (2009). Como principais determinantes foram investigadas proxies para captar os efeitos dos mecanismos de governança corporativa e ambiente legal, do desempenho das empresas, dos desvios entre direitos sobre controle e direitos sobre fluxo de caixa e do excesso de remuneração executiva. Também foram adicionadas variáveis de controle para isolar as características intrínsecas das firmas. Nas análises econométricas foram estimados os modelos pelos métodos de Poisson, corte transversal agrupado (Pooled-OLS) e logit. A estimação foi feita pelo método dos mínimos quadrados ordinários (MQO), e para aumentar a robustez das estimativas econométricas, foram utilizadas variáveis instrumentais estimadas pelo método dos momentos generalizados (MMG). As evidências indicam que os fatores investigados impactam diferentemente as diversas medidas de TPRs das empresas analisadas. Verificou-se que os contratos relacionados, em geral, são danosos às empresas, impactando negativamente o desempenho delas, desempenho este que é aumentado pela presença de mecanismos eficazes de governança corporativa. Os resultados do impacto das medidas de governança corporativa e das características intrínsecas das firmas no desempenho das empresas são robustos à presença de endogeneidade com base nas regressões com variáveis instrumentais.
Resumo:
Este estudo sistematiza e aborda a temática da formação de educadores desenvolvida nas inter-relações entre universidades brasileiras e o Movimento dos Trabalhadores Rurais Sem Terra, especificamente nos cursos de graduação em História na Universidade Federal da Paraíba e de Engenharia Agronômica na Universidade Federal de Sergipe, no período de 2004 a 2008. Tal processo desenvolve-se em um contexto difícil e complexo da luta pela reforma agrária no Brasil, principalmente pelas transformações ocorridas nos últimos anos oriundas da ampliação das lógicas de produção do agronegócio. Esta condição leva o MST a discutir e propor uma nova concepção de reforma agrária que a designa de popular em substituição à proposta de reforma agrária clássica. Por outro lado, apresenta uma visão das universidades brasileiras e dos projetos que são construídos e implementados nos últimos anos, inclusive, observando coincidências com as políticas econômicas gerais para a sociedade. Apresenta uma concepção de formação que vem sendo construída no interior das práticas do MST que também procura as universidades para firmar convênios e desenvolver processos de escolarização/formação de seus militantes educadores. Dentre as dimensões desse processo educativo/formativo, destacam-se: vínculo permanente com os processos orgânicos; a formação como um processo ético, estético, místico que trata das atitudes/comportamentos e como um processo dialógico, crítico e articulado que contempla saberes, experiências, em uma interação que busca superar as monoculturas. Captura por intermédio da pesquisa de campo: estranhamentos, entraves, sentidos da ocupação pedagógica e coletiva, alternativas, legados que permanecem tanto no MST como na universidade e apresenta o resultado do envolvimento e atuação dos egressos de ambos os cursos na atualidade. Aponta também para desafios, possibilidades outras de enfrentar a difícil mas necessária tarefa de formar educadores, militantes capazes de coletivamente levar adiante a luta por um mundo mais justo, solidário e democrático, em que a terra e o conhecimento, juntamente com os demais bens econômicos e culturais sejam profundamente democratizados. Pretende ser uma contribuição para o debate acerca da relevância dessas inter-relações entre universidade e movimentos sociais, em que essas experiências demarcam novas possibilidades de abertura e avanços democráticos e menos elitista da universidade e novos patamares de escolarização/formação para integrantes do Movimento dos Sem Terra.