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2-D FFT algorithm for frank sequence processing

100%

Dvornikov V. , Makarov A.

Hydroacoustics

2006

tom Vol. 9

47-56

The paper presents a new fast algorithm to calculate periodic auto- and crosscorrelation functions of Frank sequences. It is based on a 2-dimensional representation of the sequences and a combination of the spectral and direct correlation function calculation methods. In this case the computational accuracy is enhanced and the number of the required complex operations is reduced twice.

Dynamical heterogeneity of NaNO2 confined within porous glasses

70%

Dvornikov V. , Korotkov L. , Naberezhnov A. , Fokin A. , Korotkova T.

Optica Applicata

2008

tom Vol. 38, nr 1

25-29

Frequency dependences of imaginary part of the dielectric response e(f) of SiO2-NaNO2 nanocomposite, prepared by embedding of sodium nitrite into porous glasses with 7 nm average pore diameter, have been studied within a temperature range of 360-520 K. It has been found that the spectrum S(omega) = e(f)/f contains the component ~1/f alfa where alfa is a coefficient indicating the dynamical heterogeneity of dipoles. Peculiarities of the temperature dependence of alfa are discussed.