May 2015

Evaluation of tannery effluent content in Kano metropolis, Kano State Nigeria

A field experiment was carried out to evaluate heavy metals and physiochemical concentration of tannery effluents from Kano metropolis. Fifteen samples from five selected tannery industries from Sharada and Challawa industrial estate were collected and determined for heavy metals using atomic absorption spectrophotometric method (AAS) and the result of the study showed that the range mean and standard deviation values...

Author(s): Emmanuel BERNARD and Adepeju OGUNLEYE

May 2015

Analytical and numerical solution of heat generation and conduction equation in relaxation mode: Laplace transforms approach

In this article analytical solution of one-dimensional heat equation in relaxation mode of heat generation and conduction using Laplace transforms method is presented. The model adopted takes into account finite velocity of heat propagation, and relaxation of heat source capacity. The properties of heat source terms in four different cases are incorporated in the model and investigated. Temperature distributions and...

Author(s): Lawal M., Basant K. Jha, Patrick O. Akusu, Ahmad R. Mat Isa and Nasiru R.

May 2015

Study on laser etching mechanism of aluminum thin film on polyimide

In order to study the laser etching mechanism for aluminum thin film on polyimide substrate, the etching process was simulated by the finite element analysis software ANSYS, and etching profile was predicted. A theoretical model was established by comparing the simulated etching results with calculated ones; it was presumed that the etching process was firstly a thermal dominant one, then a photochemical interaction...

Author(s): Liu Xiao-Li, Xiong Yu-Qing, Ren Ni, Yang Jian-Ping, Wang Rui, Wu Gan and Wu Sheng-Hu

May 2015

Solutions of the Klein-Gordon equation for l≠0 with position-dependent mass for modified Eckart potential plus Hulthen potential

In this paper we solve analytical the position-dependent effective mass Klein–Gordon equation for modified Eckart potential plus Hulthen potential with unequal scalar and vector potential for l≠0. The Nikiforov-Uvarov (NU) method is used to obtain the energy eigenvalues and wave functions. We also discuss the energy eigenvalues and wave functions for the constant-mass case. The wave functions of the system are...

Author(s): M. R. Shojaei and M. Mousavi