Word: layerings
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NASA plans to announce today whether it will send the astronauts outside to repair the damage - something they could do by attaching a protective plate, dabbing on insulating paint, or squeezing on a layer of epoxy-like insulation. None of the fixes is perfect, though all of them do help - and all of them entail the added danger of an unscheduled spacewalk. (Two astronauts went out on a scheduled spacewalk this morning to replace equipment on the international space station, and two more walks are scheduled for Wednesday and Friday...
...foot," Neil Gaiman explains, "and you're 7½ months pregnant, you stop going places. You sit around, and you read." Schiffer read Gaiman's novel Stardust and told her husband that it was the best book she'd ever read. Schiffer's husband is the director Matthew Vaughn (Layer Cake). And thus it was that Gaiman finally made his big Hollywood movie...
...sealed booth, a nozzle attached to a robotic arm shoots out a constant spray of what look like white-hot sparks - picture a particularly robust Roman candle - onto a row of four cylinder heads. What it's actually spraying, however, is molten metal, adding a new 1-mm-thick layer of chrome or nickel to the head. Each time a cylinder goes through remanufacturing, a milling machine shaves a fraction of a millimeter off the cylinder's head to remove pitting. After a few shaves, however, a head can weaken. The extra layer applied by the flame spray rebuilds...
...work closely with designers to produce components that will be easy and profitable to revitalize years later. "That's an absolute key," says Fisher. "It's designing for several life cycles." Take those cylinder heads, for instance. When they're first cast, they're now given a slightly thicker layer of metal on top in expectation that they will ultimately be milled down several times. Fisher says that makes the original manufacturing a bit more expensive, but it's a cost that's more than recouped by the two or three extra lives it gives a part...
...grow into strong swimmers-and that's critical. Weak sperm do not survive long in the wild environment of the reproductive tract. There may be millions of the tiny cells released, but to reach the egg they must withstand the acidic environment of the vagina, fight through a thick layer of cervical mucus and then race the other sperm to penetrate the egg's protective layer. Men are responsible for almost 40% of conception problems, and MIF, researchers believe, may play a role in most of the cases. "It is all about sperm,"says chemist Yousef Al-Abed, the lead...