Optical solitons for cascaded system: Jacobi elliptic functions

Abstract

In this work, the coupled NLSE is studied that appears in a cascased system. Exact solutions of this coupled system acquire by using Jacobi elliptic functions. The presented system will be studied with two forms of nonlinearity. The forms are kerr law and power law. Dark, bright, singular solitons and Jacobi elliptic solutions will be acquired. We present constraint conditions for the existence of obtained solitons. Our obtained solitons will be controlled by changing the diffraction coefficients.     

Biosorption of copper(II) by nonliving lichen biomass of Cladonia rangiformis hoffm

Biosorption of heavy metals can be an effective process for the removal of heavy metal ions from aqueous solutions. In this study, the adsorption properties of lichen biomass of Cladonia rangiformis hoffm. for copper(II) were investigated by using batch adsorption techniques. The effects of initial metal ion concentration, initial pH, biosorbent concentration, stirring speed and contact time on biosorption efficiency were studied. In the experiments the optimum pH value was found out 5.0 which was the native pH value of solution. The experimental adsorption data were fitted to the Langmuir adsorption model. The highest metal uptake was calculated from Langmuir isotherm and found to be 7.6923 mg Cu(II)/g inactivated lichen at 15 degrees C. The results indicated that the biomass of C. rangiformis is a suitable biosorbent for removing Cu(II) from aqueous solutions.     

On λ-statistical convergence of difference sequences of fuzzy numbers

In this paper the concept of strongly -Cesàro summability of a sequence of fuzzy numbers is introduced. Also some inclusion relations between the set of strongly -Cesàro convergent and -statistically convergent sequences of fuzzy numbers are given.     

Electronic Raman scattering from holes in InAs/GaAs self-assembled quantum dots

A report is presented on the observation of hole excitations in unintentionally p-doped self-assembled InAs/GaAs quantum dots by resonant Raman spectroscopy. The small difference in the valence intraband energy values obtained by Raman and PL spectra is explained by the Coulomb interaction between electrons and holes. However, the reason why the maximum resonance occurs at a slightly higher energy than that of the hole excitation seen in Raman spectra is unknown.