Monday 7 April 2014
Saturday 15 March 2014
carbon nano sock absorbers:
courtesy : science daily
TROY, N.Y. —
Research on a new class of nanostructured materials used to reduce
vibrations in mechanical equipment and electronic devices, being
developed by a team of scientists at Rensselaer Polytechnic Institute,
will be featured in Nature Materials.
“The
nanoscale building blocks we have developed have both micro and macro
applications,” said Nikhil Koratkar, assistant professor of mechanical,
aerospace, and nuclear engineering at Rensselaer. “The new systems
reduce and control vibrations within structures and will benefit the
performance, safety, and reliability of future manufacturing equipment,
sensitive laboratory equipment, and everyday electronic devices.”
The Rensselaer research team, led by Koratkar, added carbon nanotube fillers to traditional vibration reduction materials to enhance their energy dissipation capability. Adding large quantities of nanoscale fillers increases the amount of surface area, and thereby increases frictional sliding that occurs at the filler-to-filler interface. The result is a decrease in vibrations.
In 2004, Koratkar received a National Science Foundation (NSF) Faculty Early Career Development Award (CAREER) to fund the development of these new materials. Additional Rensselaer researchers on the project include Pulickel Ajayan, professor of materials science and engineering; Pawel Keblinksi, associate professor of materials science and engineering; and Jonghwan Suhr, a doctoral student in mechanical, aerospace, and nuclear engineering.
The research is available in the Nature Materials journal online, and will be published in an upcoming print edition of the journal.
The Rensselaer research team, led by Koratkar, added carbon nanotube fillers to traditional vibration reduction materials to enhance their energy dissipation capability. Adding large quantities of nanoscale fillers increases the amount of surface area, and thereby increases frictional sliding that occurs at the filler-to-filler interface. The result is a decrease in vibrations.
In 2004, Koratkar received a National Science Foundation (NSF) Faculty Early Career Development Award (CAREER) to fund the development of these new materials. Additional Rensselaer researchers on the project include Pulickel Ajayan, professor of materials science and engineering; Pawel Keblinksi, associate professor of materials science and engineering; and Jonghwan Suhr, a doctoral student in mechanical, aerospace, and nuclear engineering.
The research is available in the Nature Materials journal online, and will be published in an upcoming print edition of the journal.
Friday 14 March 2014
facts about engineering:
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Engineers solve practical problems by applying mathematical and scientific knowledge.
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The word engineer comes from a Latin word meaning ‘cleverness’.
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Learn about different types of engineering jobs such as civil, mechanical and electrical with our engineering job facts.
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As of 2010, the tallest building in the world is the Burj Khalifa in Dubai, UAE. It reaches an incredible 828 metres (2717 feet) in height. Check out more building facts or our list of the tallest buildings in the world.
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The Great Pyramid of Giza is the oldest of the Ancient Wonders of the World and the last one that remains largely intact. Enjoy more pyramid facts or learn about the Ancient Egyptian pyramids.
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The building of the Panama Canal, which links the Atlantic and Pacific Oceans, was one of the most difficult engineering projects ever. It is estimated that over 25000 workers lost their lives during the long and dangerous project, with most dying from disease and landslides.
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Golf balls have dimples because they help reduce drag, this allows the ball to fly further than a smooth ball would.
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As of 2010, the longest suspension bridge in the world is the Akashi Kaikyo Bridge in Kobe, Japan. Opened in 1998, it spans an amazing 1991 metres (6529 feet). Check out more interesing bridge facts or our list of the longest bridges in the world.
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Used for water distribution, the Delaware Aqueduct in New York, USA is the longest tunnel in the world (as of 2010). Drilled through solid rock, it reaches a staggering 137 kilometres (85 miles) in length. More tunnel facts.
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The Hoover Dam, built along the Colorado River between 1931 and 1936 reaches 726 feet in height (221 metres). More interesting dam facts.
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High speed passenger trains in China reach speeds of up to 350 kph (220 mph).
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The Titanic was 882 feet (269 metres) long.
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The London Eye in England is the largest Ferris wheel in Europe, standing at a height of 135 metres (442 feet).
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The tallest wind turbine in the world has rotor tips that reach over 200 metres (656 feet) above the ground.
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Branches of engineering include aerospace, biomedical, chemical, civil, computer, electrical, environmental, forensic, genetic, mechanical, military, nuclear, reverse, software and structura
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