January 2014

Study of optical constants in Se- In –Pb thin films of chalcogenide glasses

Bulk glasses of Se75 In25-x Pbx (when n = 0, 4, 6, 10) systems and thin films have been prepared by the conventional melt quenching technique and by thermal evaporation technique, respectively. The optical constants (absorption coefficient (α), refractive index (n), extinction coefficient (k)) have been studied for Se-In-Pb thin films as a function of photon energy in the wavelength range (300-900 nm). Spectral...

Author(s): Preeti Dwivedi and Rita Awasthi

January 2014

A four-point fully implicit method for the numerical integration of third-order ordinary differential equations

In this paper, we derived a continuous linear multistep method (LMM) with step number k = 4 through collocation and interpolation techniques using power series as basis function for approximate solution. An order-seven scheme is developed which was used to solve the third-order initial value problems (IVPS) in ordinary differential equation without first reducing to a system first-order. Taylor’s series algorithm...

Author(s): Awoyemi D. O., Kayode S. J. and Adoghe L. O.