The effect of temperature and angle of incidence on defect modes in one-dimensional photonic crystal structure for TE and TM polarizations has been studied in 5-9µm wavelength region. A symmetric Si/air multilayer system, [(Si/air)5Si(air/Si)5] has been considered in this communi...
Exact solutions of nonlinear evolution equations play very important role to make known the inner mechanism of intricate physical phenomena. In this article, the novel -expansion method is applied to construct traveling wave solutions of the (1+1)-dimensional modified Benjamin-Bo...
In this work we explore an enhanced -expansion method to study the nonlinear evolution equations (NLEEs). Here we derive solitons, singular solitons and periodic wave solutions for the nonlinear (3+1)-dimensional Potential Yu–Toda–Sasa–Fukuyama (YTSF) equation. The obtained resul...
A nonlinear analytical technique (Homotopy Perturbation Method) has been developed to assess the effects of several nanofluids characteristics on the free convective heat transfer to the power-law non-Newtonian flow between two infinite parallel vertical flat plates. A numerical...
In this paper we combined the Laplace Transform with Adomian Decomposition Method (ADM) and presented an approach for solving non linear coupled and non coupled Schrödinger equation, with initial conditions. It is shown that the method does not need linearization, weak nonlineari...
Photoconductivity of ТiO2 thin films is investigated in experiment. The excitation is performed by both a continuous Hg quartz lamp and laser sources. The photoconductivity kinetics and spectrum are investigated. The multi relaxation character of photoconductivity kinetics is rev...
The crystal and molecular structure of (E)-methyl 3-(2-hydroxyphenyl)-2-(piperidine-1-carbonyl)acrylate, synthesized by one-pot three component reaction of salicylaldehyde, diethyl malonate and piperidine, has been reported. The title compound 4 crystallizes from a mixture of pet...
This paper mainly focuses the effect of palm oil fuel ash (POFA) on the microstructure of self-consolidating high-strength concrete (SCHSC). POFA has been used as a supplementary cementing material replacing ordinary portland cement (OPC) in the range of 0-30%. SCHSC mixes were p...
Aims: In the present work we explore magnetic properties especially spin glass, antiferromagnetic and paramagnetic states of diluted magnetic semiconductors (A1-xMnxA' (A = Zn, Cd and A' = S, Te, Se)). Place: Department of physics, College of natural sciences, Addis Ababa Univers...
Nonequilibrium statistical operator (NSO) in the form suggested by Zubarev is represented as an averaging operation of the quasiequilibrium statistical operator over the distribution of the lifetime of the system. The form of the density function of the system lifetime affects al...