These channels, which have a diameter of 50 microns (about the width of a human hair) are etched using standard silicon-fabrication methods.
DARPA's criteria, the craft, which has a diameter of 15cm (six inches) has managed a 16-minute flight at a top speed of nearly 70kph (45mph).
It uses a lens with a diameter of just a few millimeters and covers a much larger field of vision than a conventional rear-view mirror.
ENGADGET: Audi R8 e-tron to feature digital AMOLED rear-view mirror
Driven by a six-blade mahogany fan (see top picture) with a diameter of 9.1m, the tunnel was used to test full-sized aircraft prototypes like the Spitfire.
But concern has been emerging for some time about certain types of metal-on-metal hips, in particular those where the ball head has a diameter of 36mm or more.
X-rays, and observing how the rays are scattered, the researchers have concluded that the balls are full of particles with a diameter of about 50 billionths of a metre.
Extrapolating from this result, Dr Mileikowsky thinks that in a meteorite with a diameter of 20cm it would take about 1m years for such a colony to be reduced to a millionth of its original size.
The storm grew significantly as it passed through the Bahamas on Oct. 25 and 26, so that by the time it reached landfall in southern New Jersey its gale-force winds covered a diameter of 870 nautical miles, or about 1, 000 miles.
He predicted the cage that is used will have a diameter of 55 centimeters (21.7 inches) to 60 centimeters (23.6 inches) and will be pulled upward at a rate of one meter per second, meaning each man could make the trip in 10 to 12 minutes.
They then implanted the microelectrodes, each about a tenth the diameter of a human hair, into the animals' brains.
Like the copper cable, it would be buried in the ground--but a strand the diameter of a human hair could carry thousands of times more information than the copper wire.
The students' effort had a head diameter of 88.9 cm (35 in) and a shaft width of 35.24 cm (13.87 in).
These include long-term energy security, the viability of shipping large volumes of oil through the Bosporus, and the attractiveness of a large-diameter pipeline to a port like Ceyhan, which is able to handle exports from both sides of the Caspian.
The world record had a bell diameter of 7 and half feet (2.29m) and 120 ft long tentacles (37m).
FORBES: Lion's Mane Jellyfish Image: This Is (Literally) How Things Blow Up On The Internet!
Again this study poses the provocative question: is it possible to produce a small diameter lead that is durable.
FORBES: Robert Hauser, ICD Watchdog, Offers Viewpoint On Riata Controversy At HRS
One approach might be to say that in order to be considered a major planet, a body needs to be larger than a certain diameter.
It is called the 5M - short for 5 megawatts - has a 126m diameter, and the one turbine has the ability to power 4, 500 households.
This finding raises the question: can a small diameter lead be sufficiently robust to perform reliably over years of biologic exposure and mechanical stress in the human body?
FORBES: Robert Hauser, ICD Watchdog, Offers Viewpoint On Riata Controversy At HRS
Andrew Kent, a physicist at New York University, spends most days running electricity through a magnet smaller in diameter than a single cell, trying to determine the lowest current at which an electron's spin changes orientation.
It is the pits, which are three-quarters of a micron in diameter, three microns deep and arranged in a grid four-fifths of a micron apart, that do the trapping.
The Kulluk is a circular barge 266 feet in diameter with a funnel-shaped, reinforced steel hull that allows it to operate in ice.
Even if experimenters bounce the beams to and fro to increase the effective length of an interferometer's arms to more than 100 kilometres, the expected difference in length between the two beams' paths still amounts to less than a hundred-millionth of the diameter of a hydrogen atom.
For both modes of crystal fibre, the pattern of holes is generated by stacking hollow glass tubes a millimetre or so in diameter to form a rod several centimetres thick.
In addition to the blimps, border officials are exploring more than 100 other types of military gear, from hand-held instant-translation devices that could be used at crossings to sensors that can monitor up to a 10-mile diameter area for days at a time.
According to Michaud, an AVE power station with a 656-foot diameter could generate 200 megawatts of clean electricity at a price as low as 0.03 cents a kilowatt-hour.
FORBES: Peter Thiel Funds Effort To Tap Tornado Power To Generate Electricity
To the south, on Stocking Island, luminescent red starfish grow to over a foot in diameter.
In effect, nanotubes act as wires a few billionths of a metre in diameter.
It will feature six wind turbines with a maximum height of 64 metres and a maximum blade diameter of 71 metres.
The game is played with 49 glass or ceramic marbles grouped together on a 2m-diameter concrete cylinder raised 7cm off the ground and covered in sand.
应用推荐