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WASHINGTON cheap asics onitsuka tiger mexico mid , Aug. 26 (Xinhua) -- Scientists from the U.S., South Korea and China have developed high-tech yarns that generate electricity when stretched or twisted, an achievement they believed could eventually help curb the use of fossil fuels blamed for global warming.


In a study published this week in the U.S. journal Science, the researchers reported stretching their yarns, called twistron, 30 times a second cheap asics onitsuka tiger mexico delegation , and generated 250 watts per kilogram of peak electrical power, which is about 100 times higher than that of other wearable fibers reported in the literature


In the lab, the researchers showed that a twistron yarn weighing less than a housefly could power a small LED, which lit up each time the yarn was stretched.


"Just stretch it, and out comes electricity directly," said co-lead author Na Li cheap asics onitsuka tiger mexico 66 , a research scientist in the Alan G. MacDiarmid NanoTech Institute at the University of Texas at Dallas.


Li said their yarns are constructed from carbon nanotubes, which are hollow cylinders of carbon 10,000 times smaller in diameter than a human hair.


To generate electricity, the yarns must first be either submerged in or coated with an ionically conducting material, or electrolyte, which can be as simple as a mixture of ordinary table salt and water.


"When you insert the carbon nanotube yarn into an electrolyte bath cheap asics onitsuka tiger corsair vin , the yarns are charged by the electrolyte itself. No external battery, or voltage, is needed," she said.


When a harvester yarn is twisted or stretched, the volume of the carbon nanotube yarn decreases, bringing the electric charges on the yarn closer together and increasing their energy cheap asics gel noosa tri 8 , Li explained. This increases the voltage associated with the charge stored in the yarn, enabling the harvesting of electricity.


Li said the yarns are most suitable for powering sensors for the Internet of Things, where "changing batteries is impractical."


"Based on demonstrated average power output, just 31 milligrams of carbon nanotube yarn harvester could provide the electrical energy needed to transmit a two-kilobyte packet of data over a 100-meter radius every 10 seconds for the Internet of Things," she said.


The researchers also showed when sewed into a shirt, the yarns have the potential to serve as a self-powered respiration sensor.


In addition cheap asics gel nimbus 17 , a proof-of-concept demonstration showed that a 10-centimeter-long yarn attached between a balloon and a sinker that rested on the seabed off the east coast of South Korea produced measured electricity from ocean waves every time they stretched the yarn.


"If our twistron harvesters could be made less expensively, they might ultimately be able to harvest the enormous amount of energy available from ocean waves," said Ray Baughman, director of the NanoTech Institute and a corresponding author of the study.


The article also included researchers from Virginia Tech, Wright-Patterson Air Force Base, Hanyang University in South Korea and Nankai University in China.



French coastguard patrol the coast of the Indian Ocean island of Reunion cheap asics gel lyte v mens , on August 7, 2015 (AFP PhotoRichard Bouhet) A relative of passengers on missing Malaysia Airlines MH370 yells out as he is pushed back by police after breaking through a police line outside the Malaysian embassy in Beijing on August 7, 2015 (AFP PhotoGreg Baker) A French military transport plane has taken off from La Reunion to search for debris off the coast (AFP PhotoRichard Bouhet)

France launched a hunt for more wreckage from the ill-fated MH370 plane off Reunion island on Friday in a fresh effort to shed light on one of aviation's biggest mysteries.


The tiny French Indian Ocean territory has been under intense scrutiny since a beach cleaner found a washed-up wing part last week, which Malaysian Prime Minister Najib Razak later declared was part of the Boeing 777 that mysteriously vanished 17 months ago.


The flaperon is currently being examined by experts in France for clues as to the last moments of the Malaysia Airlines aircraft that inexplicably veered off course en route from Kuala Lumpur to Beijing, and there are hopes that Reunion may yield more debris.


In nearby Mauritius, authorities are also searching for any possible plane parts that may have landed on their shores.


Dominique Sorain cheap asics gel lyte v womens , the top government official in Reunion, told reporters that a military transport plane was patrolling the seas off the coast and a ship had also departed before being forced to return due to bad weather.


He added that helicopters would also be used, as would soldiers and policemen who will patrol the eastern part of the island where the flaperon was discovered.


"This... will last a week, after which we will draw our first conclusions," Sorain said.


As evening drew in, the search was called off cheap asics gel lyte v , to be resumed early Sunday. "There will be no mission during the day on Saturday," said military officer Aline Simon.


On Sunday, only the plane would be deployed, with boats launched if any debris is found, she added.


- Objects under seal -


Since the discovery of the two-metre-long flaperon last week, people on the island have come forward with other objects they think may look like plane parts.


Sorain said some of these objects had been sealed while waiting for experts to determine whether they really are bits of aircraft or not.


He said some of the objects were "the size of a finger."


"The flaperon looked a lot like a part from a Boeing cheap asics gel lyte iii womens , but for small elements it's much more complex."


Malaysian Transport Minister Liow Tiong Lai said Thursday that more possible MH370 objects -- aircraft seat cushions and windows -- had been discovered on Reunion island, but that any link "had to be verified by the French authorities."


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