acoustic radiation sentence in Hindi
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- Eager D . Acoustic radiation from mild steel plates of various thicknesses and aspect ratios excited by a 120 tonne press . ASME, Noise Control and Acoustics, NCA-Vol 26 : 451-454, November 1999.
- A relevant suggested scheme of sound amplification by stimulated emission of radiation using gas bubbles as the active medium was introduced around 1995 The pumping is created by mechanical oscillations of a cylindrical resonator and the phase bunching of bubbles is realized by acoustic radiation forces.
- Shi " et al . " reported a standing surface acoustic wave ( SSAW ) microfluidic device to separate microparticles with different diameters . ( Fig . 7 ) According to the equation of primary acoustic radiation force, larger particles with experience larger force than smaller particles.
- "' Acoustic radiation pressure "'is the apparent pressure difference between the average pressure at a surface moving with the displacement of the wave propagation ( the Lagrangian pressure ) and the pressure that would have existed in the fluid of the same mean density when at rest.
- The mechanisms of acoustic radiation force generations include : ( 1 ) change in the density of energy of the propagating wave due to absorption and scattering; ( 2 ) reflection from inclusions, walls or other interfaces; and ( 3 ) spatial variations in propagation velocity, and ( 4 ) spatial variations of energy density in standing acoustic waves.
- The SSAW-based sorting method manipulates the objects ( i . e ., cells, particles, and droplets ) directly by the acoustic radiation force with excellent controllability and a large range of translation, which renders it capable of precisely sorting cells into a great number ( e . g ., five ) of outlet channels in a single step.
- For a compressible spherical particle with a diameter much smaller than the wavelength of acoustic waves in an ideal fluid, the acoustic radiation force can be calculated by \ mathbf { \ mathit { F ^ { rad } } } =-\ nabla \ mathit { U }, where \ mathit { U } is a given quantity, also called acoustic potential energy.
- In molecular ultrasonography, the technique of acoustic radiation force ( also used for shear wave elastography ) is applied in order to literally push the targeted microbubbles towards microvessels wall; firstly demonstrated by Dr Paul Dayton in 1999 . This allows to maximize binding to the malignant tumor; the targeted microbubbles being in more direct contact with cancerous biomolecules expressed at the inner surface of tumoral microvessels.
- As shown in Figure 1, the acoustic radiation force on a small particle results from a non-uniform flux of momentum in the near-field region around the particle, \ mathbf { \ mathit { F ^ { rad } } } =-\ nabla \ mathit { U } which is caused by the incoming acoustic waves and the scattering on the surface of the particle when acoustic waves propagate through it.
- His lifetime of physics research spans other aspects of acoustics as well, include the contributions to the understanding of acoustic radiation pressure, which has applications to Acoustic levitation and other devices which exploit macrosonic phenomena and acoustic streaming, as well as to several other fields of Physics ( with example references shown here ), including General Relativity, ( primarily in the area of gravitational waves ), including Gravitational phenomena analogous to the parametric array, Cosmology, low temperature physics the Physics of Sound in Liquid Helium, and High Energy Particle Physics ( primarily in the area of cosmic ray particle detectors.
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