Impactos do fenômeno ENOS sobre a temperatura no Brasil.

Neste trabalho, a variabilidade das temperaturas máximas e mínimas mensais de 265 estações convencionais, componentes do Banco de Dados Meteorológicos para Ensino e Pesquisa (BDMEP do INMET), nos últimos 50 anos, foi relacionada com as variações do Oceanic Niño Index do NOAA Climate Prediction Center através do treinamento de uma rede neural artificial. Os resultados da pesquisa mostram a relação quase que direta entre ENOS (El Niño-Oscilação Sul) e as temperaturas máximas e mínimas mensais no Brasil. Foram escolhidas algumas localidades para demonstrar os resultados da pesquisa: Manaus, Recife, Cuiabá, Brasília, São Paulo e Porto Alegre. Os eventos de El Niño contribuem para o aumento das temperaturas máximas e mínimas enquanto o inverso ocorre em eventos de La Niña, exceto para a região Amazônica. Em anos de La Niña ocorrem diminuição das temperaturas do ar em quase todas as regiões do Brasil. O impacto do fenômeno ENOS no país se faz mais presente nos meses de inverno e primavera.bitstream/item/76849/1/Impactos-fenomeno.pd

Universal velocity distributions in an experimental granular fluid

We present experimental results on the velocity statistics of a uniformly heated granular fluid, in a quasi-2D configuration. We find the base state, as measured by the single particle velocity distribution $f(c)$, to be universal over a wide range of filling fractions and only weakly dependent on all other system parameters. There is a consistent overpopulation in the distribution's tails, which scale as $f\propto\exp(\mathrm{const.}\times c^{-3/2})$. More importantly, the high probability central region of $f(c)$, at low velocities, deviates from a Maxwell-Boltzmann by a second order Sonine polynomial with a single adjustable parameter, in agreement with recent theoretical analysis of inelastic hard spheres driven by a stochastic thermostat. To our knowledge, this is the first time that Sonine deviations have been measured in an experimental system.Comment: 13 pages, 15 figures, with minor corrections, submitted to Phys. Rev.

Observational Constraints on Silent Quartessence

We derive new constraints set by SNIa experiments (`gold' data sample of Riess et al.), X-ray galaxy cluster data (Allen et al. Chandra measurements of the X-ray gas mass fraction in 26 clusters), large scale structure (Sloan Digital Sky Survey spectrum) and cosmic microwave background (WMAP) on the quartessence Chaplygin model. We consider both adiabatic perturbations and intrinsic non-adiabatic perturbations such that the effective sound speed vanishes (Silent Chaplygin). We show that for the adiabatic case, only models with equation of state parameter $|\alpha |\lesssim 10^{-2}$ are allowed: this means that the allowed models are very close to \LambdaCDM. In the Silent case, however, the results are consistent with observations in a much broader range, -0.3<\alpha<0.7.Comment: 7 pages, 12 figures, to be submitted to JCA

Caging dynamics in a granular fluid

We report an experimental investigation of the caging motion in a uniformly heated granular fluid, for a wide range of filling fractions, $\phi$. At low $\phi$ the classic diffusive behavior of a fluid is observed. However, as $\phi$ is increased, temporary cages develop and particles become increasingly trapped by their neighbors. We statistically analyze particle trajectories and observe a number of robust features typically associated with dense molecular liquids and colloids. Even though our monodisperse and quasi-2D system is known to not exhibit a glass transition, we still observe many of the precursors usually associated with glassy dynamics. We speculate that this is due to a process of structural arrest provided, in our case, by the presence of crystallization.Comment: 4 pages, 5 figures, submitted to Phys. Rev. Let

Measuring quality of life in the speaker with dysarthria: reliability and validity of the european portuguese version of the QoL-DyS

Background: The impact of acquired dysarthria on the person’s life and social participation is well recognized and is the key to the process of rehabilitation. Evaluation of the effectiveness of an intervention that addresses this impact is a challenge for clinicians and researchers. Objectives: The purpose of this study was to evaluate the validity and reliability of the European Portuguese version of the Quality of Life in the Speaker with Dysarthria (QoL-DyS). Methods: This research was conducted in three phases: (i) cultural and linguistic adaptation; (ii) feasibility and reliability; and (iii) validity. The sample was composed of 105 subjects with dysarthria and 103 healthy subjects. The QAD (Quick Assessment for Dysarthria), PEAT10 (Portuguese Eating Assessment Tool), and EQ-5D (EuroQol five-dimension scale) were used for validity and reliability. Results and Conclusion: The QoL-DyS correlated positively with the QAD, PEAT-10, and EQ5D. Cronbach’s ? was 0.973, and it remained excellent when any item was deleted. The QoL-DyS score mean difference between the non-dysarthric cohort and the dysarthric cohort was also significant. Confirmatory factor analysis did not validate the original 40-item scale but a 33-item scale maintaining the four domains of the original version. A significantly higher perception of QoL was found in the non-dysarthric group. The results indicate that the European Portuguese version of the QoL-DyS is a reliable and valid tool to assess QoL in patients with dysarthria and may be used for screening in clinical practice and in research.info:eu-repo/semantics/acceptedVersio

Ultrafiltração aplicada à remoção do agrotóxico glifosato e do seu principal metabólito (AMPA) em águas de abastecimento: avaliação em escala de bancada.

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