Traditionally, application of ultrasound imaging on vocal fold vibration has been limited by the frame rate of dynamic sonography. When the frame rate fs is lower than half of the vibration frequency, ambiguity in the vibration frequency evident from dynamic sonography occurs. This ambiguity is known as aliasing. We exploited the aliasing effect in dynamic 2D-mode sonography to capture the vibr...

artificial insemination, in vitro fertilisation and surrogacy) commonly known as Assisted Reproductive Technologies (ARTs), which started in 1999 in the country, reached an important turning point on September 13, 2008. At a two day National Consultation on ‘Assisted Reproductive Technologies (ARTs): Emerging Concerns and Future Strategies’ organised by Sama Resource Group for Women and Health ...

We study the quantum transport and the nonequilibrium vibrational states of a quantum dot embedded between a normal-conducting and a superconducting lead with the charge on the quantum dot linearly coupled to a harmonic oscillator of frequency ω. To the leading order in the charge-vibration interaction, we calculate the current and the nonequilibrium phonon occupation by the Keldsyh Green’s fun...

Inconel 718, a high-temperature alloy, is a promising material for high-performance aerospace gas turbine engines components. However, the machining of the alloy is difficult owing to immense shear strength, rapid work hardening rate during turning, and less thermal conductivity. Hence, like ceramics and composites, the machining of this alloy is considered as difficult-to-turn materials. Laser...

The bypass exhaust system of a 160 MW combined cycle has been modeled and analyzed using numerical simulation in 2D prospective. Analysis was carried out using the commercial numerical simulation software, FLUENT 6.2. All inputs were based on the technical data gathered from working conditions of a Siemens V94.2 gas turbine, installed in the Yazd power plant. This paper deals with reduction of ...

The dynamics of magnetostatically coupled vortices in ferromagnetic two-dimensional (2D) nanodisk arrays is theoretically investigated using the rigid vortex model and Thiele’s equation whereby the circular motion with the lowest energy for each vortex core is described. We present here dispersion relations and density of states for eigenfrequencies of coherently rotating vortices with ordered ...

In this paper a 2-DOF lumped mass model is used for dynamic modelling of a turning process. The cutting forces are modelled using predictive machining theory based on the Merchant cutting force model. Cutting parameters such as shear angle are calculated using experimental relations. Variation of cutting angles is also considered. Regarding the governing delayed differential equations, the mode...

Abstract Even if titanium alloys are widely used for biomedical applications, the tendency they show to wear is a matter of concern their durability. In this research work, Ultrasonic Vibration Turning (UVT) was generate texturized surfaces on Ti6Al4V cylinders improving performances. To prove that, in vitro tests were performed, during which UVT-ed made slide against polyethylene disks replica...