This paper explores the use of acoustics for manipulation of bioparticles. A series of experimental studies were conducted using acoustic standing waves in resonant cavities as means of trapping bioparticles and enhancing bioparticles separation. Parallel Plane Cavity was explored. The effect of cell size and host media concentration on trapping efficiency, trapping time and velocity were inves...

This paper presents a relation between the three glacier surface velocity components, the surface flux-divergence, glacier thickness and bottom melt and displacement. The relation can be used as an extension to the surface parallel flow assumption often used with interferometric synthetic aperture measurements of glacier velocities. The assumptions for the derivation are described and important...

We report on the experimental demonstration of light dragging effect due to atomic motion in a rubidium vapor cell. We found that the minimum group velocity is achieved for light red-shifted from the center of the atomic resonance, and that the value of this shift increases with decreasing group velocity, in agreement with the theoretical predictions by Kocharovskaya, Rostovtsev, and Scully [Ph...

Light-weight robots are robots especially designed for mobility and interaction with a priori unknown environments and with humans. These applications pose the requirements of a light-weight design with high load to weight ratio and high motion velocity (close to the approximately 1:1 ratio of human arms at a tip velocity of 6m/s). Further, they require a modular, integrated mechanical and elec...

We report on the experimental demonstration of light dragging effect due to atomic motion in a rubidium vapor cell. We found that the minimum group velocity is achieved for light red-shifted from the center of the atomic resonance, and that the value of this shift increases with decreasing group velocity, in agreement with the theoretical predictions by Kocharovskaya, Rostovtsev, and Scully [Ph...

fundamental quantities in nature, underlies many of the basic properties of the universe. The velocity of a pulse of light propagating in any medium (homogeneous or inhomogeneous) is determined by the group index ng , a magnitude which should not be confused with the refractive index of the medium. The group velocity, given by vg=c /ng , where c is the speed of light in vacuum, is determined no...

We design compact (a few wavelength long) and efficient (>99%) injectors for coupling light into slow Bloch modes of periodic thin film stacks and of periodic slab waveguides. The study includes the derivation of closed-form expressions for the injection efficiency as a function of the group-velocity of injected light, and the proof that 100% coupling efficiencies for arbitrary small group velo...

We study the diffusive propagation of multiply scattered light in an optically thick cloud of cold rubidium atoms illuminated by a quasiresonant laser beam. In the vicinity of a sharp atomic resonance, the energy transport velocity of the scattered light is almost 5 orders of magnitude smaller than the vacuum speed of light, reducing strongly the diffusion constant. We verify the theoretical pr...

We have explored the magnetosphere described by a numerical solution for an axisymmetric rotating field satisfying the force-free and ideal MHD conditions everywhere. The electric current distribution is determined by the requirement of continuity and smoothness of the flux function across the light cylinder. The overall magnetic field structure is obtained using the numerical result. We also c...

The sweep speed of an electron beam across the face of an oscilloscope can exceed the velocity of light, although of course the velocity of the electrons does not. Associated with this possibility there should be a kind of Čerenkov radiation, as if the oscilloscope trace were due to a charge moving with superluminal velocity.