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Cloaking devices -- it's not just 'Star Trek' anymore
During the 175th Meeting of the Acoustical Society of America, being held May 7-11, 2018, in Minneapolis, Minnesota, [Amanda D.] Hanford will describe the physics behind an underwater acoustic shield designed in her lab.
Hanford and her team set out to engineer a metamaterial that can allow the sound waves to bend around the object as if it were not there. Metamaterials commonly exhibit extraordinary properties not found in nature, like negative density. To work, the unit cell -- the smallest component of the metamaterial -- must be smaller than the acoustic wavelength in the study.
[...] To date, most acoustic metamaterials have been designed to deflect sound waves in air. Hanford decided to take this work one step further and accept the scientific challenge of trying the same feat underwater. Acoustic cloaking underwater is more complicated because water is denser and less compressible than air. These factors limit engineering options.
(Score: 1, Troll) by realDonaldTrump on Friday May 11 2018, @06:17AM
Mitch McConnell, smart guy, right? He used the Nuclear Option in the Senate. It worked great, we got Judge Gorsuch into the SC. And I asked Mitch, why don't you use that one all the time? And he said it could come back to bite us in the ass. And not in a good way. Because if the Dems ever get a majority in the Senate they'll want to go nuclear all the time.
My Generals, also very smart. I asked them, why don't we use our nuclear arsenal more often? Because it worked great on Japan. And they said it could come back to bite us in the ass. If we're not careful, it could zap our cyber. Mexico, not much cyber. There would be fallout, very bad for our dairy farmers, they'd have to throw out all the milk. And it could cause climate change, the nuclear winter. Cancun, it gets a little colder, it's still warm. Duluth, it gets colder, certain body parts may fall off. May freeze and fall off. Although sometimes I think we could use a little bit of that nuclear winter!
Let me tell you, Spam Modding is the same. Because it doesn't just block the folks you want to block. And it's not blocking the folks you want to block. Right? You do double or triple Spam Modding, maybe it blocks the tweets about baby rape, about baby murder. And maybe it blocks you. And maybe it blocks me. Let me tell you, if there wasn't Spam Modding, maybe the baby rape & murder person would get VERY BORED. Because she wouldn't be getting other people blocked. And she wouldn't be wasting the Administrators' time. DENUKE!!!