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Now showing items 41-50 of 91
New advances in magnetic nanostructures
(2007)
"Some of the new developments on magnetic nanostructures are reviewed. The advances on the synthesis, characterization, and understanding of magnetic nanoclusters, magnetic nanowires and single molecule magnets are discussed. ...
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], ...
Supersymmetric free-damped oscillators: adaptive observer estimation of the Riccati parameter
(2006)
"A supersymmetric class of free damped oscillators with three parameters has been obtained in 1998 by Rosu and Reyes through the factorization of the Newton equation. The supple-mentary parameter is the integration constant ...
Supersymmetry of FRW barotropic cosmologies
(2006)
"Barotropic FRW cosmologies are presented from the standpoint of nonrelativis-tic supersymmetry. First, we reduce the barotropic FRW system of diferential equations to simple harmonic oscillator diferential equations. ...
Synchronization of the frenet-serret linear system with a chaotic nonlinear system by feedback of states
(2005)
"A synchronization procedure of the generalized type in the sense of Rulkov et al [Phys. Rev. E 51, 980 (1995)] is used to impose a nonlinear Malasoma chaotic motion on the Frenet-Serret system of vectors in the differential ...
Shape invariance through Crum transformation
(2006)
"We show in a rigorous way that Crum´s result regarding the equal eigenvalue spectrum of Sturm-Liouville problems can be obtained iteratively by successive Darboux transformations. Furthermore, it can be shown that all ...
Nonlinear software sensor for monitoring genetic regulation processes with noise and modeling errors
(2005)
"Nonlinear control techniques by means of a software sensor that are commonly used in chemical engineering could be also applied to genetic regulation processes. We provide here a realistic formulation of this procedure ...
Riccati nonhermiticity with application to the Morse potential
(2005)
"A supersymmetric one-dimensional matrix procedure, similar to the relationships of the same type between Dirac and Schrodinger equations in particle physics, is described in the general terms. By this means, we are able ...
Supersymmetric pairing of kinks for polynomial nonlinearities
(2005)
"We show how one can obtain kink solutions of ordinary differential equations with polynomial nonlinearities by an efficient factorization procedure directly related to the factorization of their nonlinear polynomial part. ...