In this paper, the Chebychev spectral collocation method is applied for the thermal analysis of convective-radiative straight fins with the temperature-dependent thermal conductivity. The developed heat transfer model was used to analyse the thermal performance, establish the optimum thermal design parameters, and also, investigate the effects of thermo-geometric parameters and thermal conducti...

In a spin field effect transistor, a magnetic field is inevitably present in the channel because of the ferromagnetic source and drain contacts. This field causes random unwanted spin precession when carriers interact with non-magnetic impurities. The randomized spins lead to a large leakage current when the transistor is in the " off "-state, resulting in significant standby power dissipation....

As a simple model of a supernova explosion we study a point mass exploding into two equal point masses moving back to back at high velocity, or a superposition of such elementary explosions. We employ two calculational methods. In one method we assume an infinite acceleration for zero time and calculate the gravitational field and the distribution of emitted energy. A cutoff frequency in the po...

In the age of scaled silicon technology to improve the functional efficiency of a CMOS design, the device geometry and device parameters are constantly scaled. The major factors of the power consumption due to continuous reduction of the oxide thickness (tOX) is the gate leakage current in both the active and standby mode of the device and other is due to scaled supply voltage, the sub-threshol...

This paper presents a novel method of formant tracking. It shows that formant information can be extracted from the cepstrum coefficients . Explicit nonlinear formulas has been developed to map psd (power spectral density) of speech signal to formant frequencies. Formants can be tracked by ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques). An ”‘constrained”’ ESPRIT s...

Abstract — A new, simple large signal model for high power HBTs and BJTs suitable for CAD tools is proposed and experimentally evaluated. The major features of the model are that main model parameters are determined directly from measurements in typical operating conditions and that the model exhibits good convergence properties. The model was evaluated with extensive DC, S parameter, and power...

In a spin field effect transistor, a magnetic field is inevitably present in the channel because of the ferromagnetic source and drain contacts. This field causes random unwanted spin precession when carriers interact with non-magnetic impurities. The randomized spins lead to a large leakage current when the transistor is in the " off "-state, resulting in significant standby power dissipation....

We examine the effect of inhomogeneous reionization on the galaxy power spectrum and the consequences for probing dark energy. To model feedback during reionization, we apply an ansatz setting the galaxy overdensity proportional to the underlying ionization field. Thus, inhomogeneous reionization may leave an imprint in the galaxy power spectrum. We evolve this imprint to low redshift and use t...