In telecommunication, a method for managing dispersion that combines two or more types of single mode fiber to produce the desired dispersion over the entire link span has been proposed. The total dispersion can be set at virtually any value as the contributions from different components may have opposite signs (i.e. either positive or negative) and hence they can partially, or completely, canc...

Using Lie-transform techniques, we derive higher-order corrections to the path-averaged model governing evolution of Ž . dispersion-managed solitons in the spectral domain. The result holds in the case of arbitrary including moderate and strong dispersion. The general theory is illustrated by deriving the exact formulas q for a specific symmetric dispersion map. q 2000 Published by Elsevier Sci...

The difference between the maximum and minimum QT interval measured from a 12-lead electrocardiogram was defined as an index of spatial inhomogeneous repolarization of the ventricular myocardium. The causal relationship between QT dispersion and incidence of ventricular arrhythmias has been pointed out in various heart diseases, but until now it was discussed mainly related to sinus rhythm. QT ...

This Paper deals with the analysis of the performance limitation of SMF (single mode fiber) due to nonlinear effect. With the help of optsim simulation software a combination of SMF and DCF (dispersion compensation fiber) has been simulated with a proper variation in length to tackle the effects in the transmission system. Better performance was shown when a combination of SMF length 90Km and D...

eight accessions of thyme medicinal plant, belonging to iranian endemic thymus daënensis, t. eriocalyx, t. migricus and an unknown thymus spp species, were tested for karyotypic analysis, using squash technique and 2% (w/v) aceto-orcein staining method. chromosomal parameters examined were: short arm (s), long arm (l), total length of chromosome (tl), arm ratio (ar), r-value, total chromosome v...