Patrimônio da humanidade: a edificação discursiva da cidade de São Luis nas políticas de preservação do Estado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Segurança estrutural de uma ponte ferroviária em concreto armado sobre o rio Mãe Maria

O estudo do comportamento de pontes ferroviárias vem tomando grande destaque na área experimental, devido muitas das vezes haver a necessidade de um aumento dessas cargas móveis. A companhia VALE a partir de um convênio estabelecido com a UFPA (Universidade Federal do Pará), buscou realizar estudos das capacidades resistentes das pontes ferroviárias, que compõem a Estrada de Ferro Carajás (EFC), para futuros casos de carregamentos que passarão de 32 tf para 40 tf, o que provoca mudanças consideráveis no comportamento da estrutura. A falta de manutenção ou uma manutenção irregular das pontes de concreto armado podem resultar em manifestações patológicas que podem comprometer a segurança e ao risco de intervenção do escoamento. Dentre as OAE’s (Obras de Arte Especial) já analisadas, encontra-se a ponte sobre o Rio Mãe Maria localizada no município de Marabá, estado do Pará, transpondo o rio Mãe Maria, identificada como OAE 50A, apresenta um traçado retilíneo executada em concreto armado moldada “in loco”, é constituída por dois vãos hiperestáticos, totalizando 64,20 m, transpondo o leito do rio em dois vãos de 20 m e com seção transversal oferecendo a largura de 5,85 m. Com isso tornou-se indispensável para avaliação de sua integridade física a monitoração com extensômetros elétricos de resistência (EER) dos elementos (laje, longarina, blocos, encontros e tubulões) que compões a estrutura durante a passagem dos trens carregados de minério. Além da monitoração, foram realizados ensaios não-destrutivos como: dureza superficial através da esclerometria e a estimativa do cobrimento da armadura e localização da mesma por meio da pacometria, ensaios destrutivos como: extração de corpos-de-prova para determinar a compressão diametral e o módulo de elasticidade do concreto e a resistência a penetração através do teste de carbonatação inerentes a questão de durabilidade do mesmo, que serão comparados com a memória de cálculo e com os modelos computacionais tridimensionais desenvolvidos via “software” comercialSAP2000® (COMPUTERS AND STRUCTURES), que utiliza o método dos elementos finitos (MEF). O MEF foi utilizado para obtenção dos esforços permitindo as verificações de segurança de acordo com as recomendações normativas, tais análises comparativas são apresentadas e discutidas para a conclusão do comportamento das longarinas. Conhecendo com precisão a capacidade estrutural da ponte e a sua vida útil, pode-se assegurar o tráfego de composições com maior segurança.

Estudo da interação genótipo x ambiente sobre a produção de leite em rebanhos da raça Parodo-Suiço no Brasil, utilizando inferência Bayesiana

Verifica a presença de heterogeneidade de variâncias sobre a produção de leite na primeira lactação de fêmeas da raça Pardo-Suíço e, seu impacto sobre a avaliação genética dos reprodutores, utilizando a inferência Bayesiana por meio de amostrador de Gibbs, foram utilizados 2981 registros referentes às produções de leite e idade da vaca ao parto, em primeiras lactações de vacas da raça Pardo-Suíço, distribuídos em 62 rebanhos. Os registros foram provenientes do serviço de controle leiteiro da Associação Brasileira de Criadores de Gado Pardo Suíço, com os partos ocorridos entre os anos de 1980 a 2002. Foram estabelecidas duas classes de desvio-padrão fenotípico para produção de leite. Posteriormente, os dados foram analisados desconsiderando e considerando as classes de desvio-padrão. As médias observadas e desvio-padrão para produção de leite nas classes de alto e baixo desviopadrão e em análise geral foram iguais a 5802,02 ± 1929,96, 4844,37 ± 1592,99, 5373,47 ± 1849,13, respectivamente. As médias posteriores para os componentes de variâncias foram maiores na classe de alto desvio-padrão. A herdabilidade obtida na classe de alto desviopadrão foi próxima do valor observado na análise geral e inferior ao valor encontrado na classe de baixo desvio-padrão fenotípico. A correlação genética para a produção de leite entre as classes de desvio-padrão foi igual a 0,48. As correlações de Pearson e Spearman entre os valores genéticos para a produção de leite obtidos na análise geral, com os valores obtidos em cada classe de desvio-padrão foram todas maiores que 0,80, quando se considerou todos os reprodutores. Porém, refinando a amostra de reprodutores verifica-se que, as correlações diminuem em magnitude. Existindo uma maior variabilidade nos rebanhos presentes na classe de alto desvio-padrão e, o impacto dessa heterogeneidade de variância sobre a avaliação genética de reprodutores, é pequeno, pois a fonte principal dessa heterogeneidade é decorrente de fatores genéticos confirmando a presença de heterogeneidade de variâncias.

Comparison of the reliability of multifocal visual evoked cortical potentials generated by pattern reversal and pattern pulse stimulation

This study compared the effectiveness of the multifocal visual evoked cortical potentials (mfVEP) elicited by pattern pulse stimulation with that of pattern reversal in producing reliable responses (signal-to-noise ratio >1.359). Participants were 14 healthy subjects. Visual stimulation was obtained using a 60-sector dartboard display consisting of 6 concentric rings presented in either pulse or reversal mode. Each sector, consisting of 16 checks at 99% Michelson contrast and 80 cd/m2 mean luminance, was controlled by a binary m-sequence in the time domain. The signal-to-noise ratio was generally larger in the pattern reversal than in the pattern pulse mode. The number of reliable responses was similar in the central sectors for the two stimulation modes. At the periphery, pattern reversal showed a larger number of reliable responses. Pattern pulse stimuli performed similarly to pattern reversal stimuli to generate reliable waveforms in R1 and R2. The advantage of using both protocols to study mfVEP responses is their complementarity: in some patients, reliable waveforms in specific sectors may be obtained with only one of the two methods. The joint analysis of pattern reversal and pattern pulse stimuli increased the rate of reliability for central sectors by 7.14% in R1, 5.35% in R2, 4.76% in R3, 3.57% in R4, 2.97% in R5, and 1.78% in R6. From R1 to R4 the reliability to generate mfVEPs was above 70% when using both protocols. Thus, for a very high reliability and thorough examination of visual performance, it is recommended to use both stimulation protocols.

Comparação de métodos para determinar a seletividade de herbicidas na cultura da cana-de-açúcar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Épocas e extensões do período de convivência das plantas daninhas interferindo na produtividade da cultura do milho (Zea mays)

Q field experiment was carried out at the Gralha Azul Experimental Farm/PUCPR, in the municipality of Fazenda Rio Grande-PR, to evaluate the effect of different times and coexistence extension periods of weeds interfering in corn yield. The experiment was arranged in a complete randomized complete block design and the treatments in a 4x5+2 factorial, with four replications. The treatments were as follows: four initial weed control periods (0-0, 0-7, 0-14 and 0-21 DAE) and five restarted weed control periods until the harvest (28, 42, 56, 70 and 84 DAE) and two checks, weedy and weed-free. The experiment was carried out under a no-till system. The period prior to weed interference (PBWI), the start of the critical period of weed interference (CPWI) and the infesting community were evaluated. When the initial weed control period was 0-0 day, the PPWI was at 9 DAE of corn; however, with increasing initial weed control periods (0-7, 0-14 and 0-21 DAE) the period prior to weed interference inncreased in relation to 0-0 day of the initial weed control, evidencing the existence of PPWI-S of 17, 24 and 28 DAE of corn, respectively. Thus CPWI initiates at the end of PPWI-S, the period when weed control is indispensable to prevent a significant reduction in corn yield. Coexistance with the weeds throughout the crop cycle reduced yield in 15%, compared to the weed-free check. Nine species of seven botanical families were assessed in the infesting community. Reduced density and dry mass were verified in the weeds that coexisted with corn, compared to those that grew without it, thus evidencing a suppressive effect of corn over the infesting plants.

Adaptabilidade e estabilidade de clones de cana-de-açúcar

The objective of this study was to identify clones of sugarcane with good stability and adaptability in the State of São Paulo, Brazil, and also identifying locations most representative for selection and experimentation. Ten clones and two commercial checks of medium-late maturation were evaluated in the first-ratoon of experiments harvested in August 2009, using bissegmented regression and AMMI (Additive Main Effects and Multiplicative Interaction Analysis) methods. The results of two methods were compared and they evidenced that the clones RB975201, RB975157, RB975932, RB975242 and RB975162 are the most promising, showing higher production when compared to the checks, higher stability observed in one or both statistical methods and broader or more specific adaptability. The environment Tarumã presented higher stability and capacity to discriminate genotypes, allowing an ordering more reliable as compared to the overall mean of the environments tested.

Reconstruction of the gravitational wave signal h(t) during the Virgo science runs and independent validation with a photon calibrator

The Virgo detector is a kilometer-scale interferometer for gravitational wave detection located near Pisa (Italy). About 13 months of data were accumulated during four science runs (VSR1, VSR2, VSR3 and VSR4) between May 2007 and September 2011, with increasing sensitivity. In this paper, the method used to reconstruct, in the range 10 Hz-10 kHz, the gravitational wave strain time series h(t) from the detector signals is described. The standard consistency checks of the reconstruction are discussed and used to estimate the systematic uncertainties of the h(t) signal as a function of frequency. Finally, an independent setup, the photon calibrator, is described and used to validate the reconstructed h(t) signal and the associated uncertainties. The systematic uncertainties of the h(t) time series are estimated to be 8% in amplitude. The uncertainty of the phase of h(t) is 50 mrad at 10 Hz with a frequency dependence following a delay of 8 mu s at high frequency. A bias lower than 4 mu s and depending on the sky direction of the GW is also present.

Relações públicas e mídias sociais: o desafio de construir relacionamentos na era da hiperconexão

This proposed project is to analyze the strategies for building and maintaining relationships, as well as the possibilities of intervention of the public relations in the virtual world. For this purpose, we used the multicase study of beer brands - Devassa, Nova Schin, Heineken, Skol and Brahma - to verify their roles in the communication process in their social media channels. Analyses were based on communication theories covering concepts such as the Excellence in Public Relations, the questioning about the definition of public flashing and discussion about the processes of interaction mediated by the Internet. The evaluation of the channels covered the period of 30 days and that the end of the checks it was found that most brands promote specific actions with surface interconnections between media channels, referring only to the effectiveness of social networks like Twitter, Facebook and Orkut in order to consolidate of relationships

Desenvolvimento de um código computacional para simulação e análise de espectros atômicos

The aim of this work was the development a computer code for simulation and analysis of atomic spectra from databases constructed from the literature. There were created four routines that can be useful for spectroscopic studies in the atomic processes of laser isotope separation. In the first routine, Possible Transitions, the program checks the possible electron transitions from an energy level of the atom present in the database considering the selection rules for an electric dipole transition. The second routine, Locator Transitions, checks the possible electronic transitions within a user-specified spectral region. The routine Spectra Simulator creates simulated spectra using the graphical application gnuplot through lorentzian curve and finally, the routine Electronic Temperature determines the temperature of electronic excitation of the atom, thought the Boltzmann Plot Method. To test the reliability of the program there were obtained experimental emission spectra of a hollow cathode discharge of dysprosium and argon as a buffer gas. The hollow cathode discharge has been subjected to different values of operating currents and pressure of inert gas. The spectra obtained were treated with the assistance of program routines developed (Transition Locator and Spectra Simulator) and temperatures electronic excitation of the atoms of dysprosium in the different discharge conditions were calculated (routine Electronic Temperature). The results showed that the electronic excitation temperature of the neutral dysprosium atoms in the hollow cathode discharge increases with increasing current applied to the cathode and also by increasing the gas pressure buffer. The determination coefficients, R2, obtained by the Electronic Temperature routine using the linear adjust of the Boltzmann Plot Method were greater... (Complete abstract click electronic access below)

Interação genótipo x ambiente para produção de grãos e podridões de colmo em milho

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Eventos adversos relacionados à gravidade e carga de trabalho de enfermagem em Unidade de Terapia Intensiva

Pós-graduação em Enfermagem - FMB

Vila Sésamo: o contexto político e educacional das duas edições audiovisuais educativas brasileiras

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Desenvolvimento de um instrumento multidimensional para avaliação de práticas de ensino no processo de aprendizagem

Pós-graduação em Engenharia Mecânica - FEG

Efeitos de três modalidades de atividade física na capacidade funcional de idosos

The aim of this study was to analyze and compare the effects of three types of physical activity: general physical activity, dance and weight training, in functional capacity in elderly. The sample included 94 seniors with a mean age of 64.06 ± 7.38 years, who participated in PROFIT. For the evaluation we used the battery of test from AAHPERD, which checks the levels of flexibility, coordination, agility and dynamic balance, strength endurance and general endurance before and after four months of intervention. The results indicated a maintained in the levels of functional components. The participants general physical activity group had better results on the components: strength endurance, agility and dynamic balance. It can be concluded that the practice of regular physical activity and systematized, regardless of the type may have a positive influence on the functional performance of elderly and can preserve their independence and autonomy.