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Search Results: 1 - 10 of 181950 matches for " álvaro Dutra de Souza "
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Elton Pereira,Darlan de Sousa Santos Junior,álvaro Dutra de Souza,Pierre Augusto
Perspectivas Online : Biológicas e Saúde , 2011,
Abstract: O objetivo deste estudo foi avaliar quanto risco um exercício de resistência excêntrico pode proporcionar aosindivíduos que apresentem distintas respostas de hiperCKemia. Vinte e seis homens saudáveis realizaram umprotocolo de exercício, durante o qual duas séries de 30 repeti es excêntricas de rosca bíceps foramrealizadas com 120% de 1 repeti o máxima (1RM). Os indivíduos forneceram amostras de sangue antes e48h após o exercício para avaliar níveis séricos da creatina quinase (CK). Baseado nas respostas da atividadesérica de CK os sujeitos foram separados em dois grupos, denominados: Respondedores Normais (NR) ouAltos Respondedores (HR). Uma grande variabilidade interindividual na atividade sérica de CK após oexercício e uma diferen a significativa entre NR e HR foram observadas. O volume de treino n odemonstrou diferen a significativa entre NR e HR. O principal achado foi a grande variabilidadeinterindividual da atividade sérica da CK, que é observada mesmo quando se usa um único exercíciomostrando varia o no risco de les es entre os indivíduos.
Quantum propagator for some classes of three-dimensional three-body systems
A. de Souza Dutra
Physics , 2007, DOI: 10.1016/j.aop.2005.09.007
Abstract: In this work we solve exactly a class of three-body propagators for the most general quadratic interactions in the coordinates, for arbitrary masses and couplings. This is done both for the constant as the time-dependent couplings and masses, by using the Feynman path integral formalism. Finally the energy spectrum and the eigenfunctions are recovered from the propagators.
Strong-Weak Coupling Duality in Quantum Mechanics
A. de Souza Dutra
Physics , 1996,
Abstract: We present a strong-weak coupling duality for quantum mechanical potentials. Similarly to what happens in quantum field theory, it relates two problems with inverse couplings, leading to a mapping of the strong coupling regime into the weak one, giving information from the nonperturbative region of the parameters space. It can be used to solve exactly power-type potentials and to extract deep information about the energy spectra of polynomial ones.
Mapping deformed hyperbolic potentials into nondeformed ones
A. de Souza Dutra
Physics , 2005, DOI: 10.1016/j.physleta.2005.02.075
Abstract: In this work we introduce a mapping between the so called deformed hyperbolic potentials, which are presenting a continuous interest in the last few years, and the corresponding nondeformed ones. As a consequence, we conclude that these deformed potentials do not pertain to a new class of exactly solvable potentials, but to the same one of the corresponding nondeformed ones. Notwithstanding, we can reinterpret this type of deformation as a kind of symmetry of the nondeformed potentials.
Ordering ambiguity versus representation
Alvaro de Souza Dutra
Mathematics , 2007, DOI: 10.1088/0305-4470/39/1/014
Abstract: In this work we show that the ordering ambiguity on quantization depends on the representation choice. This property is then used to solve unambiguously some particular systems. Finally, we speculate on the consequences for more involved cases.
Intera??o entre micorrizas arbusculares e ácido giberélico no desenvolvimento vegetativo de plantas de citrange carrizo
Souza, Paulo Vitor Dutra de;
Ciência Rural , 2000, DOI: 10.1590/S0103-84782000000500007
Abstract: citrus plants generaly depend on arbuscular mycorrhizal fungi (amf). there are several reports indicating interaction between hormones and amf. it has also been proven that plant and amf symbiosis benefits from auxin aplication to roots. the present study had the objective to determine if plant-hormone interaction occurred with hormone groups other than auxins. mycorrhizal and nonmycorrhizal carrizo citrange (citrus sinensis (l.) osb. x poncirus trifoliata (l.) raf.) root systems were submerged for 10 seconds in a 10ppm gibberelic acid (ga3) solution. amf increased the vegetative growth of carrizo citrange seedlings as well as p, zn and cu leaf contents. mycorrhizal seedlings had lower ca, mg, fe and mn concentrations in leaves than nonmycorhizal seedlings, while n and k concentrations were not affected by amf. ga3 treated seedlings had a bigger trunk diameter but the treatment did not increase seedling height, dry weight, leaf number and leaf area per plant. ga3 treatment also resulted in increased levels of p and fe in the leaves, reduced k leaf contents but had no effect on other nutrients and did not affect root colonization by amf. moreover, the interaction between amf and ga3 had a significative effect on carrizo citrange vegetative growth, indicating that ga3 favored plant-amf symbiosis.
Strategic Environmental Assessment to Improve Infrastructure Impact Assessments in Brazil  [PDF]
Isabel Silva Dutra de Oliveira, Marcelo Monta?o, Marcelo Pereira de Souza
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410136

The wider consideration of environmental effects and alternatives in early stages of decision-making has been pointed as one of the major benefits of Strategic Environmental Assessment (SEA). Adopted by virtually all of developed countries and sprawling around emergent and developing ones, it is recognized that SEA effectiveness is attached to its systematic application in development plans and programmes. Brazil and many developing countries have different experiences with this instrument and lacks of definition of a procedural framework to promote the use of SEA in strategic levels of decision. As a consequence development projects are frequently threatened” by impact assessment outcomes, especially when a mandatory project-EIA has to inform decisions. In order to contribute to the implementation of SEA in developing countries, the present paper discusses the potential benefits of using SEA in transport infrastructure plans and programmes, through a case study applied to transport plans in the state of Sao Paulo (south-eastern Brazil). The outcomes indicate that SEA could contribute to improve infrastructure impact assessments, minimizing social and environmental conflicts, augmenting the acceptability of projects and decisions, reinforcing the need for SEA to be systematically implemented in Brazil.

A Fran a na encruzilhada das reformas
Meridiano 47 : Boletim de Análise de Conjuntura em Rela??es Internacionais , 2009,
Abstract: Esse artigo objetiva a reflex o sobre os protestos que a Fran a atravessa devido ao plano de reformas estruturais do governo.
Dirac equation exact solutions for generalized asymmetrical Hartmann potentials
Alvaro de Souza Dutra,M. B. Hott
Physics , 2007, DOI: 10.1016/j.physleta.2006.03.042
Abstract: In this work we solve the Dirac equation by constructing the exact bound state solutions for a mixing of vector and scalar generalized Hartmann potentials. This is done provided the vector potential is equal to or minus the scalar potential. The cases of some quasi-exactly solvable and Morse-like potentials are briefly commented.
Free Relativistic Anyons with Canonical Spin Algebra
D. Dalmazi,A. de Souza Dutra
Physics , 1994, DOI: 10.1016/0370-2693(94)01445-I
Abstract: We discuss a relativistic free particle with fractional spin in 2+1 dimensions, where the dual spin components satisfy the canonical angular momentum algebra $\left\{ S_\mu , S_\nu \right\}\,=\,\epsilon_{\mu \nu \gamma}S^\gamma $. It is shown that it is a general consequence of these features that the Poincar\`e invariance is broken down to the Lorentz one, so indicating that it is not possible to keep simultaneously the free nature of the anyon and the translational invariance.
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