Ultra-sonic Velocity in Water

Minimally invasive dentistry using sonic and ultra-sonic devices in ultraconservative Class 2 restorations.

AIM Within the context of minimally invasive dentistry this article describes the sonic and ultrasonic cavity preparation techniques and assesses their advantages and disadvantages, clinical difficulties of their use, and offers a statement about these devices. BACKGROUND Ultra-conservative Class 2 restorative techniques require the use of devices such as sonic and the new ultrasonic preparat...

Sonic Gradient Index Lens in Water

We study the acoustic scattering properties of a phononic crystal designed to behave as a gradient index lens in water, both experimentally and theoretically. The gradient index lens is designed using a square lattice of stainless-steel cylinders based on a multiple scattering approach in the homogenization limit. We experimentally demonstrate that the lens follows the graded index equations de...

Ultra Sonic Sprayer Controlling Dust in Experimental Poultry Houses

Dust control tests of experimental enclosed layer and floor feeding broiler houses were performed with ultra sonic sprayer units which have some advantages such as 1) low cost, 2) low electric power consumption, 3) forcing the charge and 4) unnecessary to lay pipes to spray. With spraying 2 % solution of emulsified canola oil in layer house, the concentration of dust with aerodynamic diameter (...

Ultra Sonic Image Interpretation for Non-Destructive Testing

For interpretation of ultra sonic images an image interpretation system based on case based reasoning is proposed. We describe the case representation and the case based reasoning process.

Beware of ultra-low-velocity knee dislocation.