Fast remaining thickness measurement using Lamb wave is presented for the purpose of maintenance of large structures like oil storage tanks and pipe networks. This study used a laser ultrasonic source to perform a high resolution remote scanning over aluminum plates with grooved and circular defects that were modeled on corrosions in plate-like structures. The antisymmetric A0 and symmetric S0 ...

PURPOSE Dense, vision-obscuring calcification on the posterior aspect of silicone intraocular lenses (IOLs) is often not amenable to neodymium:yttrium-aluminum-garnet capsulotomy, and, in prior reports, has required IOL exchange. We report the successful removal of dense calcium deposition on the posterior surface of a three-piece silicone lens using pars plana vitrectomy (PPV). MATERIALS AND...

For neutrino-beam production, 12-GeV protons from the KEK proton synchrotron (PS) are extracted in a 1.1μs spill every 2.2seconds. The proton beam is bent to the Kamioka direction, and hits an aluminum target embedded in the first horn. A pair of horn magnets focuses positively charged particles, mainly positive pions produced in the proton-aluminum interaction. A pion monitor[3] is occasionall...

Inadequate drinking water supplies have been cited as a major reason for poor weight gain in broiler production. One of the limiting factors is nipple waterer flow rate. Research demonstrated a constant water flow rate of 25 mL/min impeded BW by approximately 156 g (0.34 lb) at 6 wk of age compared with those having 75 mL/min through the grow out. A device to measure nipple flow rates was devel...

Acoustic wave devices have gained enormous interest for sensor applications. In the current practice, the surface acoustic waves are usually generated and measured by piezoelectric transducers. In this work, however, we propose to generate the acoustic waves by using a magnetostrictive transducer using magneticstrictive nickel strip gratings and a sensing coil. The coil encircling the gratings ...

THE ANCIENT WORLD passed from the Stone Age through the Bronze and Iron Ages to our modern developed society—a society that is dependent on metals and alloys for its very existence. However, an impressive body of metallurgical knowledge developed in the thousands of years since ancient man first found copper and became curious enough to investigate the behavior of this naturally occurring, rela...