A note on gravity-scalar fluctuations in holographic RG flow geometries

We study five-dimensional gravity models with non-vanishing background scalar fields which are dual to non-conformal boundary field theories. We develop a procedure to decouple the graviton fluctuations from the scalar ones and apply it to the simplest case of one scalar field. The quadratic action for the decoupled scalar fluctuations has a very simple form and can be used to compute two-point functions. We perform this computation for the two examples of background RG flow recently considered by DeWolfe and Freedman and find physically reasonable results.Comment: 13 pages, latex, no figure

Calculation of unsteady transonic aerodynamics for oscillating wings with thickness

An analytical approach is presented to account for some of the nonlinear characteristics of the transonic flow equation for finite thickness wings undergoing harmonic oscillation at sonic flight speed in an inviscid, shock-free fluid. The thickness effect is accounted for in the analysis through use of the steady local Mach number distribution over the wing at its mean position by employing the local linearization concept and a coordinate transformation. Computed results are compared with that of the linearized theory and experiments. Based on the local linearization concept, an alternate formulation avoiding the limitations of the coordinate transformation method is presented

Aspectos botânicos e relato da resitência de nabo silvestre aos herbicidas inibidores da ALS.

bitstream/CPACT-2009-09/11941/1/documento_239.pd

Tachyon condensation and universality of DBI action

We show that a low-energy action for massless fluctuations around a tachyonic soliton background representing a codimension one D-brane coincides with the Dirac-Born-Infeld action. The scalar modes which describe transverse oscillations of the D-brane are translational collective coordinates of the soliton. The appearance of the DBI action is a universal feature independent of details of a tachyon effective action, provided it has the structure implied by the open string sigma model partition function.Comment: LaTex, 15 p. v2: references adde

Manejo de plantas daninhas na produção de arroz orgânico.

bitstream/item/78976/1/documento-304.pd

Tolerância de Capim-arroz (Echinochloa crus-galli spp.) ao Herbicida Imazetapir + Imazapic em arrozais da região Sudeste do RS.

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Controle químico de um biótipo de capim-arroz com provável resistência aos herbicidas inibidores de ALS - recomendação preliminar.

bitstream/item/46796/1/Circular-96.pd

Orientações para o uso correto de herbicidas no arroz BRS Sinuelo CL.

bitstream/item/32586/1/Orientacoes.para.uso.correto.de.herbicidas.no.arroz.BRS.Sinuelo.pdfResponsáveis técnicos: Giovani Theisen, André Andres (CPACT)

Diferenças entre espécies de Ervilhaca (Vicia sativa e Vicia villosa) quanto à sensibilidade aos herbicidas utilizados para seu controle em trigo.

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Épocas de controle de angiquinho e prejuízos em arroz irrigado cv. BRS QUERÊNCIA.

bitstream/item/30503/1/boletim-93.pd