Despite the simplicity of the hexagonal graphene structure formed by carbon atoms, the electronic behavior shows fascinating properties, giving high expectation for the possible applications of graphene in the field. The Graphene Nano-Ribbon Field Effect Transistor (GNRFET) is an emerging technology that received much attention in recent years. In this paper, we investigate the device performan...

Elastic abrasive cutting is a new high-performance method to produce workpieces made of materials different hardness, which ensures lower wear cut-off wheels and higher quality machined surfaces. However, the literature referring elastic scarce; additional studies are thus needed. This paper proposes approach for modelling optimizing process, reflecting specifics its particular implementation. ...

Exact solutions of the linear water-wave problem describing oblique waves over a submerged horizontal cylinder small (but otherwise fairly arbitrary) cross-section in two-layer fluid are constructed form convergent series powers parameter characterizing “thinness” cylinder. The terms these expressed through solution exterior Neumann for Laplace equation flow unbounded past obtained describe tra...

In this work, by means of Monte Carlo simulations, the static and dynamic behavior of isolated-gate InAs/AlSb high electron mobility transistors (Sb-HEMTs) has been studied and compared with experimental results. The influence of the existence of a native oxide under the gate, the value of the surface charges in the gate recess and the possible variation of electron sheet carrier density, ns, h...

In this paper, a simple non-linear analytical charge control model for the DC and microwave characteristics of AlGaN/GaN MODFET is presented. The effect of parasitic resistances s R and d R is also incorporated. The model has also been extended to obtain the expressions for transconductance, drain conductance and cut-off frequency of the device. The model predicts a high transconductance of 502...

Recent developments concerning the unsteady dynamic forces on a spherical particle at finite Reynolds number are reviewed for solid particles and clean micro-bubble. A particle frequency response function and an energy transfer function are derived for a solid particle or a contaminated micro-bubble in gas or liquid flow. A simple, unified method for estimating the cut-off frequency, or cut-off...

This paper presents a novel just noticeable distortion (JND) guided foveation video coding method, by which the foveation region can be adaptively selected according to the video content. In the proposed method, two factors are taken into account: first, we set a fixed foveation and then get the cut-off frequency for every macroblock. Second, we compute the JND values for each pixel in the fram...

This paper presents the design of a sub-threshold CMOS G,„-C low-pass filter in a portable ECG detection system. The proposed filter is formed by cascading 6 stages of identical l^'-order low-pass sections. With a minimum number of active components in the l^'-order section, the noise contribution of the circuit can be kept low while minimizing the size of transistors and capacitors. The filter...

© 2015 Gholamreza Karimi et al. 945 http://dx.doi.org/10.4218/etrij.15.0114.0188 A novel microstrip low-pass filter is presented to achieve an ultra-wide stopband with 11 harmonic suppression and very sharp skirt characteristics. The filter is composed of a modified U-shaped resonator (which creates two fully adjustable transmission zeroes), a T-shaped resonator (which determines a cut-off freq...

This paper describes a low-voltage and low-power Gm-C low pass filter. The low-pass filter that precedes the A/D converter is called anti-aliasing filter. In the analog signal processing, the anti-aliasing filter would be one of the most important circuits in the transceiver architecture. This filter is located in the analog front-end circuits of DAB receivers. The 4 – order butterworth Gm-C lo...