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In this paper, Si nanowire (NW) sensor in pH detection is presented. The conductance of device is analytically obtained and demonstrated the conductance increases with reducing the oxide thickness. To calculate the electrical conductance of sensor, the diffusion-drift model and nonlinear Poisson-Boltzmann equation are used. To improve the conductance a Si(More)
This paper aims to directly extend the Hamiltonian approach and coupled homotopy-variational formulation to study the periodic solutions of the Helmholtz-Duffing oscillator. The results of numerical example are presented and only a few terms are required to obtain accurate solutions. Results derived from this method are shown graphically. The behaviors of(More)
  • Elaheh Tahernezhad, Fatemeh Behjat, A. Kargar
  • 2014
The present study was an attempt to investigate the degree of anxiety among Iranian intermediate EFL learners and its relation to their motivation. To this end, a total number of 80 EFL learners (35 males and 45 females) were selected through cluster random sampling from two language classes at Islamic Azad University, Sardasht Branch, Hormozgan Province,(More)
An analysis has been performed to study the natural convection of a non-Newtonian fluid between two infinite parallel vertical flat plates and the effects of the non-Newtonian nature of fluid on the heat transfer are studied. The governing boundary layer and temperature equations for this problem are reduced to an ordinary form and are solved by Homotopy(More)
In this paper, an analytical approach based on ballistic current transport is presented to investigate the electrical characteristics of the coaxial nanowire field effect transistor (CNW FET). The potential distribution along the nanowire is derived analytically by applying Laplace equation. In addition to assumption of ballistic transport, tunneling(More)
Learner attributions, perceived causes of success and failure, have received considerable attention.<lb>However, very little research has been carried out in the area of learning foreign languages. This empirical<lb>study investigated Turkish EFL students’ attributions in reading. The aims of the study were (1) to investigate<lb>university students’(More)
conservation form and artificial non-viscosity term is used to prevent high vibrations in shock area in momentum equation. Because of changing cross section along the flow, all fluid characteristics would be considered a function of x. so by choosing an appropriate control volume, the main equations include continuity, momentum and energy were discrete .To(More)
In this paper, the Hamiltonian approach is applied to nonlinear vibrations and oscillations. Periodic solutions are analytically verified and consequently the relationship between the natural frequency and the initial amplitude is obtained in an analytical form. The method is applied to four nonlinear differential equations. It has indicated that by(More)
This paper addresses the following questions: is (external) merge, the binary operation that<lb>combines two elements into a constituent in every variant of the Minimalist Program (Chomsky, 1993, 1995<lb>and related works), an unconstrained operation? If so, what avoid generating ill-formed structures? I will<lb>argue here for a simple functional / lexical(More)