Tag Archives: higher frequency

Post-Sandy Survey Shows a Polluted but Generally Intact Barrier System off Long Island

By Environment, , , , , , , , , , , , , , , , , , , , , ,

AUSTIN, Texas — As coastal communities continue to rebuild in the wake of Hurricane Sandy, scientists at last week’s annual meeting of the American Geophysical Union offer some encouraging news: The storm did not seriously damage the offshore barrier system that controls erosion on Long Island. Long-term concerns remain about the effects on the region of sea-level rise, pollutants churned up by the storm within back-barrier estuaries, and the damage closer to shore, but in the near-term, Long Island residents can rebuild knowing that Hurricane Sandy did not significantly alter the offshore barrier systems that control coastal erosion on the island. (more…)

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Super-fine Sound Beam could one Day be an Invisible Scalpel

By Health, Science, , , , , , , , , , , , , , , , , , , , , , , , , ,

ANN ARBOR — A carbon-nanotube-coated lens that converts light to sound can focus high-pressure sound waves to finer points than ever before. The University of Michigan engineering researchers who developed the new therapeutic ultrasound approach say it could lead to an invisible knife for noninvasive surgery.

Today’s ultrasound technology enables far more than glimpses into the womb. Doctors routinely use focused sound waves to blast apart kidney stones and prostate tumors, for example. The tools work primarily by focusing sound waves tightly enough to generate heat, says Jay Guo, a professor of electrical engineering and computer science, mechanical engineering, and macromolecular science and engineering. Guo is a co-author of a paper on the new technique published in the current issue of Nature’s journal Scientific Reports. (more…)

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