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Now showing items 31-40 of 122
Gravitational bouncing of a quantum ball: Room for Airy's function Bi
(2002)
"I apply (i) a classical version of the Ermakov-Lewis procedure and (ii) the strictly isospectral supersymmetric approach to the Schrodinger free fall of the bouncing ball type. In both cases, the Airy function Bi, which ...
Self-image effects in diffraction and dispersion
(2006-06)
"Talbot's self-imaging effect occurrs in near-field diffraction. In the rational paraxial approximation, the Talbot images are formed at distances z=p/q, where p and q are coprimes, and are superpositions of q equally ...
Niederhauser's model for epilepsy and wavelet methods
(2006-06)
"Wavelets and wavelet transforms (WT) could be a very useful tool to analyze electroencephalogram (EEG) signals. To illustrate the WT method we make use of a simple electric circuit model introduced by Niederhauser [1], ...
Including transcription factor information in the superparamagnetic clustering of microarray data
(2010)
"In this work, we modify the superparamagnetic clustering algorithm (SPC) by adding an extra weight to the interaction formula that considers which genes are regulated by the same transcription factor. With this modified ...
Multifractal analyses of row sum signals of elementary cellular automata
(2012)
"We first apply the WT-MFDFA, MFDFA, and WTMM multifractal methods to binomial multifrac-tal time series of three different binomial parameters and find that the WTMM method indicates an enhanced difference between the fractal ...
Perceptual security of encrypted images based on wavelet scaling analysis
(2016)
"The scaling behavior of the pixel fluctuations of encrypted images is evaluated by using the detrended fluctuation analysis based on wavelets, a modern technique that has been successfully used recently for a wide range ...
Shifted one-parameter supersymmetric family of quartic asymmetric double-well potentials
(2014)
"Extending our previous work (Rosu, Mancas, Chen, Ann.Phys. 343 (2014) 87-102), we define supersymmetric partner potentials through a particular Riccati solution of the form F(x) = (x − c)2 − 1, where c is a real shift ...
Ermakov-Ray-Reid systems with additive noise
(2015)
"Using the methods developed by us in Cervantes-López et al. (2014) for multiplicative noises, we present results on the effects of the additive noise on the Ermakov-Lewis invariant. This case can be implemented in the ...
Scaling analyses based on wavelet transforms for the Talbot effect
(2013)
"The fractal properties of the transverse Talbot images are analysed with two well-known scaling methods, the wavelet transform modulus maxima (WTMM) and the wavelet transform multifractal detrended fluctuation anal- ysis ...
The Hurst exponents of Nitzschia sp. diatom trajectories observed by light microscopy
(Elsevier, 2015)
"We present the results of an experiment with light microscopy performed to capture the trajectories of live Nitzschia sp. diatoms. The time series corresponding to the motility of this kind of cells along ninety-five ...