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Hahn's symmetric quantum variational calculus

We introduce and develop the Hahn symmetric quantum calculus with applications to the calculus of variations. Namely, we obtain a necessary optimality condition of Euler{Lagrange type and a sufficient optimality condi- tion for variational problems within the context of Hahn's symmetric calculus. Moreover, we show the effectiveness of Leitmann's direct method when applied to Hahn's symmetric variational calculu...

Waste fiber reinforced composite materials : production and mechanical properties

Acoustic field calibration for noise prediction: the CALCOM'10 data set

Wave energy is one of the marine renewable energies that are becoming increasingly explored. One of the concerns about the respective ocean plants is the noise generated by the mechanical energy converters. This noise may affect the fauna surrounding the energy plant, what induces the idea of planning the location of a prospective plant, optimum in terms of noise minimization. Naturally, in such an approach, th...

A influência da frente térmica da ressurgência costeira de cabo frio na perda d...

Este trabalho avaliou a perda do sinal acústico na presença do gradiente térmico formado pela ressurgência costeira de Cabo Frio – RJ. Para tanto, utilizou-se de um modelo numérico hidrodinâmico para construir a estrutura termohalina da ressurgência. Essa estrutura foi implementada como parâmetro de entrada em um modelo acústico e utilizada como base de propagação do som. Após este procedimento, foram simulados...

Purificação de IgG de codorna a partir de soro e gema de ovos

Ostrich (Struthio camelus) gastric diseases in Minas Gerais, Brazil, from 1997 ...

A Intervenção Farmacêutica na Prevenção de Acontecimentos Adversos relacionados...

From oceanographic to acoustic forecasting: acoustic model calibration using in...

Sonar performance prediction relies heavily on acoustic propagation models and environmental representations of the oceanic area in which the sonar is to operate. The performance estimate is derived from a predicted acoustic eld, which is the output of a propagation model. Though well developed nowadays, acoustic propagation modeling is limited in practice by simpli cations in the numerical methods, in the env...

Classification of three-dimensional ocean features using three-dimensional empi...

Acoustic tomography is now a well known method for remote estimation of water column properties. The problem is ill-conditioned and computationally intensive, if each spatial point varies freely in the inversion. Empirical orhogonal functions (EOFs) efficiently regularize the inversion, leading to a few (2, 3) coefficients to be estimated, giving a coherent estimate of the field. At small scales, EOFs are typic...

Field calibration a tool for acoustic noise prediction. The CALCOM 10 data set

It is widely recognized that anthropogenic noise affects the marine fauna, thus it becomes a major concern in ocean management policies. In the other hand there is an increasing demand for wave energy installations that, presumably, are an important source of noise. A noise prediction tool is of crucial importance to assess the impact of a perspective installation. Contribute for the development of such a tool ...