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what the science is looking forward to
the "exoskeleton" made of aluminum and electronic gadgets can multiply ones strength and endurance up to 20 times. jameson — who works for robotics firm sarcos inc. in salt lake city, which is under contract with the u.s. army — is helping assess the 150-pound suit`s viability for the soldiers of tomorrow. the suit works by sensing every movement the wearer makes and almost instantly amplifying it. the army believes soldiers may someday wear the suits in combat, but it`s focusing for now on applications such as loading cargo or repairing heavy equipment. sarcos is developing the technology under a two-year contract worth up to $10 million, and the army plans initial field tests next year. before the technology can become practical, the developers must overcome cost barriers and extend the suit`s battery life. jameson was tethered to power cords during his demonstration because the current battery lasts just 30 minutes.
new ipod nano commercial.
congratulations to anguysh on winning our ipod nano drawing!
we will be announcing our next drawing soon, so keep racking up those experience points!
smaller then a dust mite.
a material that is harder than diamond has been created by packing together tiny "nanorods" of carbon.
the new material, known as aggregated carbon nanorods (acnr), was created by compressing and heating super-strong carbon molecules called buckyballs or carbon-60. these molecules consist of 60 atoms that interlock in hexagonal or pentagonal shapes and resemble tiny soccer balls.
the super-tough acnr was created by compressing carbon-60 to 200 times normal atmospheric pressure, while simultaneously heating it to 2226°c.
the properties of the resulting material were then measured using a diamond anvil cell at the european synchrotron radiation facility in france. this instrument squeezes a material between two normal diamonds, enabling researchers to study it at high pressure using synchrotron radiation – extremely intense x-rays which reveal the material’s structure.
the researchers found their acnr to be 0.3% denser than ordinary diamond and more resistant to pressure than any other known material.
while an ordinary diamond gets its hardness from the strong molecular bonds between each of its atoms, acnr derives its strength from the fact that it is formed from interlocking nanorods.
"our material actually scratches normal diamonds," says natalia dubrovinskaia, of the university of bayreuth, in germany, who led the research. dubrovinskaia believes the material could offer a wide range of potential industrial applications. as it is stable at very high temperatures, she says it could be better than normal diamond for deep drilling and polishing abrasive materials. she also believes it will be easy to mass produce the super-tough material.
newscientist
undeniable proof that highly advanced explosives were used on september 11. this discovery has been formally released april 6th, by dr. neils harrit; department of chemistry at the university of copenhagen, denmark.
the worlds smallest guitar. http://www.news.cornell.edu/releases/nov03/nemsguitar.ws.html
article submitted by master911. scientists have created a breakthrough substance that can change in seconds when exposed to liquid, shifting from hard plastic to soft and back again, and that has a wide range of potential medical applications. the material -- inspired by the skin of sea cucumbers -- has astounding "mechanical morphing characteristics," according to an article published in the latest issue of science. researchers said a plethora of possible biomedical applications exist for the malleable new material, including as part of "artificial nervous systems" for patients with parkinson's disease, stroke or spinal cord injuries. sea cucumbers , found on ocean floors around the world, have leathery skin, an elongated, cucumber-like shape, and a consistency that can be either gelatinous, stiff and rigid, or anything in between. this "switching effect" in the tissue of the sea cucumber is derived from a distinct nanocomposite structure in which highly rigid collagen nanofibers are embedded in a soft connective tissue. now the school of engineering at case western reserve university and researchers at the louis stokes cleveland department of veterans affairs medical center have succeeded after years of effort in mimicking the unusual architectural structure of the sea creatures. "these creatures can reversibly and quickly change the stiffness of their skin. normally it is very soft but, for example in response to a threat, the animal can activate its 'body armor' by hardening its skin," said jeffrey capadona, associate investigator at the va's advanced platform technology (apt) center. with the sea cucumber as their model, the scientists unveiled a radically new approach for developing polymer nanocomposites which alter their mechanical properties when exposed to certain chemical stimuli. "we can engineer these new polymers to change their mechanical properties -- in particular stiffness and strength -- in a programmed fashion when exposed to a specific chemical," said christoph weder, a professor of macromolecular science at case western reserve, and a senior author on the article. stuart rowan, professor of macromolecular science at case western reserve, said: "the materials ... were designed to change from a hard plastic -- think of a cd case -- to a soft rubber when brought in contact with water." source, source
