Friday, June 29, 2012

Reuters: Science News: Enjoy the long weekend, if only for second

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Enjoy the long weekend, if only for second
Jun 29th 2012, 11:22

By Chris Wickham

LONDON | Fri Jun 29, 2012 7:22am EDT

LONDON (Reuters) - The world is about to get a well-earned long weekend but don't make big plans because it will only last an extra second.

A so-called 'leap second' will be added to the world's atomic clocks as they undergo a rare adjustment to keep them in step with the slowing rotation of the earth.

To achieve the adjustment, on Saturday night atomic clocks will read 23 hours, 59 minutes and 60 seconds before moving on to midnight Greenwich Mean Time.

Super-accurate atomic clocks are the ultimate reference point by which the world sets its wrist watches.

But their precise regularity - which is much more constant than the shifting movement of the earth around the sun that marks out our days and nights - brings problems of its own.

If no adjustments were made, the clocks would move further ahead and after many years the sun would set at midday. Leap seconds perform a similar function to the extra day in each leap year which keeps the calendar in sync with the seasons.

The grandly named International Earth Rotation and Reference Systems Service (IERS) based in Paris, is responsible for keeping track of the gap between atomic and planetary time and issuing international edicts on the addition of leap seconds.

"We want to have both times close together and it's not possible to adjust the earth's rotation," Daniel Gambis, head of the Earth Orientation Centre of the IERS, told Reuters.

Gambis said the turning of the earth and its movement around the sun are far from constant.

In recent years a leap second has been added every few years, slightly more infrequent than in the 1970s despite the long-term slowdown in the earth's rotation caused by tides, earthquakes and a host of other natural phenomena.

Adjustments to atomic clocks are more than a technical curiosity.

A collection of the highly-accurate devices are used to set Coordinated Universal Time which governs time standards on the world wide web, satellite navigation, banking computer networks and international air traffic systems.

There have been calls to abandon leap seconds but a meeting of the International Telecommunications Union (ITU), the U.N. agency responsible for international communications standards, failed to reach a consensus in January.

"They decided not to decide anything," says Gambis, adding that another attempt will be made in 2015.

Opponents of the leap second want a simpler system that avoids the costs and margin for error in making manual changes to thousands of computer networks. Supporters argue it needs to stay to preserve the precision of systems in areas like navigation.

Britain's Royal Astronomical Society says the leap second should be retained until there is a much broader debate on the change.

"This is something that affects not just the telecom industry," said RAS spokesman Robert Massey. "It would decouple time-keeping from the position of the sun in the sky and so a broad debate is needed."

Time standards are important in professional astronomy for pointing telescopes in the right direction but critical systems in other areas, not least defense, would also be affected by the change.

"To argue that it would be pain free is not quite true," Massey said.

A decision is not urgent. Some estimate that if the current arrangement stays, the world may eventually have to start adding two leap seconds a year. But that is not expected to happen for another hundreds years or so.

In the meantime, Massey plans to use his extra second wisely this weekend. "I'll enjoy it with an extra second in bed," he said.

(Editing by Andrew Heavens)

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Thursday, June 28, 2012

Reuters: Science News: China hails space mission's success as crew returns to Earth

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China hails space mission's success as crew returns to Earth
Jun 29th 2012, 04:31

By Michael Martina

BEIJING | Fri Jun 29, 2012 12:31am EDT

BEIJING (Reuters) - China's Shenzhou 9 spacecraft returned to Earth on Friday, ending a mission that put the country's first woman in space and completed a manned docking test critical to its goal of building a space station by 2020.

The spacecraft's gumdrop-shaped return capsule descended to Earth by parachute and touched down shortly after 10 a.m. (0200 GMT) in China's northwestern Inner Mongolia region with its three-member crew, including female astronaut Liu Yang.

Beijing has hailed the nearly two-week mission as a technical breakthrough for the country's growing space program. The launch, landing and docking exercises with the experimental Tiangong 1 space lab module were broadcast live on state television and met with an outpouring of national pride.

Moments after the capsule landed with a thud in the barren pasture lands, ground crew rushed to open the hatch. The official Xinhua news agency reported the astronauts as saying: "We have returned, and we feel good."

An hour later, mission commander Jing Haipeng smiled and waved as he emerged from the capsule in his white space suit. Fellow astronauts Liu Wang and Liu Yang followed to loud applause.

Their mission marked the first time China has transferred astronauts between two orbiting craft, a milestone in an effort to acquire the technological and logistical skills to run a full space station that can house people for long periods.

The three astronauts were whisked to one side, seated in chairs and interviewed by state media.

"We are proud of the motherland," Liu Yang said.

Speaking in Beijing, Premier Wen Jiabao congratulated the crew and welcomed them home.

"Tiangong 1 and Shenzhou 9, in the task of manned rendez-vous and docking, have achieved complete success," Wen said.

"This is another outstanding contribution by the Chinese people to humanity's efforts to explore and use space."

China is far from catching up with the established space superpowers, the United States and Russia. But the Shenzhou 9 marked China's fourth manned space mission since 2003, and comes as budget restraints and shifting priorities have held back U.S. manned space launches.

The United States will not test a new rocket to take people into space until 2017 and Russia has said manned missions are no longer a priority.

NASA has begun investing in U.S. firms to provide commercial spaceflight services and is spending about $3 billion a year on a new rocket and capsule to send astronauts to the moon, asteroids and eventually to Mars.

China says it has spent about $6 billion on its manned space program since 1992.

Beijing plans an unmanned moon landing and deployment of a moon rover and its scientists have raised the possibility of sending a man to the moon, but not before 2020.

China is also jostling with neighbors Japan and India for a bigger presence in space, but its plans have faced international wariness. Beijing says its aims are peaceful.

(Reporting by Michael Martina; Additional reporting by Sally Huang and Sabrina Mao; Editing by Ken Wills and Ron Popeski)

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Reuters: Science News: West's wildfires a preview of changed climate: scientists

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West's wildfires a preview of changed climate: scientists
Jun 29th 2012, 01:14

By Deborah Zabarenko and Laura Zuckerman

Thu Jun 28, 2012 9:14pm EDT

(Reuters) - Scorching heat, high winds and bone-dry conditions are fueling catastrophic wildfires in the U.S. West that offer a preview of the kind of disasters that human-caused climate change could bring, a trio of scientists said on Thursday.

"What we're seeing is a window into what global warming really looks like," Princeton University's Michael Oppenheimer said during a telephone press briefing. "It looks like heat, it looks like fires, it looks like this kind of environmental disaster ... This provides vivid images of what we can expect to see more of in the future."

In Colorado, wildfires that have raged for weeks have killed four people, displaced thousands and destroyed hundreds of homes. Because winter snowpack was lighter than usual and melted sooner, fire season started earlier in the U.S. West, with wildfires out of control in Colorado, Montana and Utah.

The high temperatures that are helping drive these fires are consistent with projections by the U.N. Intergovernmental Panel on Climate Change, which said this kind of extreme heat, with little cooling overnight, is one kind of damaging impact of global warming.

Others include more severe storms, floods and droughts, Oppenheimer said.

The stage was set for these fires when winter snowpack was lighter than usual, said Steven Running, a forest ecologist at the University of Montana.

Mountain snows melted an average of two weeks earlier than normal this year, Running said. "That just sets us up for a longer, dryer summer. Then all you need is an ignition source and wind."

Warmer-than-usual winters also allow tree-killing mountain pine beetles to survive the winter and attack Western forests, leaving behind dry wood to fuel wildfires earlier in the season, Running said.

"Now we have a lot of dead trees to burn ... it's not even July yet," he said. Trying to stop such blazes driven by high winds is a bit like to trying to stop a hurricane, Running said: "There is nothing to stop that kind of holocaust."

Fires cost about $1 billion or more a year, and exact a toll on human health, ranging from increased risk of heart, lung and kidney ailments to post-traumatic stress disorder, said Howard Frumkin, a public health expert at the University of Washington.

"Wildfire smoke is like intense air pollution," Frumkin said. "Pollution levels can reach many times higher than a bad day in Mexico City or Beijing."

The elderly, the very young and the ill are most vulnerable to the heat that adds to wildfire risk, he said. The strain of fleeing homes and living in communities in the path of a wildfire can trigger ailments like post-traumatic stress disorder, depression and anxiety.

The briefing was convened by the science organization Climate Communications, with logistical support by Climate Nexus, an advocacy and communications group. An accompanying report on heat waves and climate change was released simultaneously here

(This story corrects the name of group convening the briefing in last paragraph)

(Reporting By Deborah Zabarenko; Editing by Stacey Joyce)

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Reuters: Science News: Saturn's largest moon likely has an underground ocean

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Saturn's largest moon likely has an underground ocean
Jun 29th 2012, 00:05

By Irene Klotz

CAPE CANAVERAL, Florida | Thu Jun 28, 2012 8:05pm EDT

CAPE CANAVERAL, Florida (Reuters) - NASA's Cassini spacecraft has found strong evidence for an ocean of water beneath the frozen crust of Saturn's largest moon Titan, scientists said Thursday.

The finding propels Titan into a short list of places including Jupiter's moon Europa and Saturn's smaller moon Enceladus suspected of harboring underground seas.

"The evidence is strong that Titan is squishy," said planetary scientist Jonathan Lunine, with Cornell University.

The evidence was put together during six passes over Titan by Cassini, which is orbiting Saturn, between 2004 and 2011. During the flybys, scientists measured minute changes in the pitch of radio signals passing between the spacecraft and Earth to figure how much Saturn's gravity deformed the moon.

They then turned to computer models to match a 10-meter (33-foot) distortion with possible scenarios to explain what was going on. The more solid the moon's interior, the less it would be impacted by Saturn's gravity.

"The measurement is pretty conclusive about the existence of an internal ocean," said lead researcher Luciano Iess, with Sapienza University in Rome, Italy.

"The presence of water does not imply life," he added. "Â"But Titan has many interesting ingredients - hydrocarbons, a hydrological cycle and a thick atmosphere."

Scientists have no idea if the ocean is in contact with rock, a possible source of minerals and other components believed to be needed for life.

Based on the Cassini findings, Titan's suspected ocean lies about 100 kilometers (62 miles) beneath the surface.

Although the moon sports lakes of liquid hydrocarbons, such as methane and ethane, Titan's ocean is probably mostly water.

"The subsurface ocean has to be made of water, or water mixed with a relatively small percentage of salts," Iess said.

If the ocean were liquid hydrocarbons, the heavier surface ice would sink and Cassini would see a global hydrocarbon ocean on the surface, he added.

Scientists hope to refine gravity maps of Titan after additional Cassini flybys planned through 2017.

Cassini arrived at Saturn in 2004.

The research appears in this week's issue of Science.

(Editing by Todd Eastham)

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Reuters: Science News: West's wildfires a preview of changed climate: scientists

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West's wildfires a preview of changed climate: scientists
Jun 28th 2012, 22:12

By Deborah Zabarenko and Laura Zuckerman

Thu Jun 28, 2012 6:12pm EDT

(Reuters) - Scorching heat, high winds and bone-dry conditions are fueling catastrophic wildfires in the U.S. West that offer a preview of the kind of disasters that human-caused climate change could bring, a trio of scientists said on Thursday.

"What we're seeing is a window into what global warming really looks like," Princeton University's Michael Oppenheimer said during a telephone press briefing. "It looks like heat, it looks like fires, it looks like this kind of environmental disaster ... This provides vivid images of what we can expect to see more of in the future."

In Colorado, wildfires that have raged for weeks have killed four people, displaced thousands and destroyed hundreds of homes. Because winter snowpack was lighter than usual and melted sooner, fire season started earlier in the U.S. West, with wildfires out of control in Colorado, Montana and Utah.

The high temperatures that are helping drive these fires are consistent with projections by the U.N. Intergovernmental Panel on Climate Change, which said this kind of extreme heat, with little cooling overnight, is one kind of damaging impact of global warming.

Others include more severe storms, floods and droughts, Oppenheimer said.

The stage was set for these fires when winter snowpack was lighter than usual, said Steven Running, a forest ecologist at the University of Montana.

Mountain snows melted an average of two weeks earlier than normal this year, Running said. "That just sets us up for a longer, dryer summer. Then all you need is an ignition source and wind."

Warmer-than-usual winters also allow tree-killing mountain pine beetles to survive the winter and attack Western forests, leaving behind dry wood to fuel wildfires earlier in the season, Running said.

"Now we have a lot of dead trees to burn ... it's not even July yet," he said. Trying to stop such blazes driven by high winds is a bit like to trying to stop a hurricane, Running said: "There is nothing to stop that kind of holocaust."

Fires cost about $1 billion or more a year, and exact a toll on human health, ranging from increased risk of heart, lung and kidney ailments to post-traumatic stress disorder, said Howard Frumkin, a public health expert at the University of Washington.

"Wildfire smoke is like intense air pollution," Frumkin said. "Pollution levels can reach many times higher than a bad day in Mexico City or Beijing."

The elderly, the very young and the ill are most vulnerable to the heat that adds to wildfire risk, he said. The strain of fleeing homes and living in communities in the path of a wildfire can trigger ailments like post-traumatic stress disorder, depression and anxiety.

The briefing was convened by Climate Nexus, an advocacy and communications group. An accompanying report on heat waves and climate change was released simultaneously here

(Reporting By Deborah Zabarenko)

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Reuters: Science News: Privately owned telescope to hunt for killer asteroids

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Privately owned telescope to hunt for killer asteroids
Jun 28th 2012, 21:55

By Irene Klotz

CAPE CANAVERAL, Florida | Thu Jun 28, 2012 5:55pm EDT

CAPE CANAVERAL, Florida (Reuters) - A California space research group plans to build, launch and operate a privately funded space telescope to hunt for asteroids that may be on a collision course with Earth, project managers said on Thursday.

The B612 Foundation - named after a fictional planet in the book "The Little Prince" - is counting on private donors to raise money for the wide-angle, infrared telescope and its operations, estimated at a few hundred million dollars.

The goal is to chart 500,000 asteroids that fly relatively close to Earth.

The telescope, called Sentinel, will be positioned closer to the sun than Earth so it can look outward and track approaching asteroids for months, Apollo astronaut Rusty Schweickart, chairman emeritus of B612, said during a conference call.

The technology exists to deflect an asteroid, provided it is found in time, added former shuttle and space station astronaut Ed Lu, the foundation's chairman and chief executive.

The goal is to have decades of notice, Lu told Reuters.

"I think it would be embarrassing if we were to be struck by a major asteroid in the next few decades simply because we didn't choose to do the mapping that's needed to find these asteroids," he said.

Schweickart said it wasn't a question of if Earth will be hit by an asteroid, but when.

The planet bears the scars of past events. An impact 65 million years ago is believed to have triggered a change in Earth's climate that killed off dinosaurs and other life.

In 1908, an incoming asteroid or comet blasted apart over Siberia, Russia, leveling 830 square miles (2,150 square kilometers) of trees.

"You don't want to put off for some future date, if you can make a difference now, something which relates directly to human lives and public safety," Schweickart said. "That's why we've taken the initiative."

During its planned 5 1/2 year mission, Sentinel should be able to find 90 percent of near-Earth asteroids that are 460 feet in diameter or larger, and about 50 percent of asteroids 130 feet in diameter.

In addition to looking out for potentially dangerous asteroids, the information could be used for proposed asteroid mining projects and by researchers.

The telescope will be built by Ball Aerospace and operated by the University of Colorado's Laboratory for Atmospheric and Space Physics in Boulder, Colorado.

It is expected to be launched in 2017 or 2018 aboard a Space Exploration Technologies' Falcon 9 rocket.

(Editing by Kevin Gray and Stacey Joyce)

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Reuters: Science News: Scientists develop spray-on battery

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Scientists develop spray-on battery
Jun 28th 2012, 16:17

By Chris Wickham

LONDON | Thu Jun 28, 2012 12:17pm EDT

LONDON (Reuters) - Scientists in the United States have developed a paint that can store and deliver electrical power just like a battery.

Traditional lithium-ion batteries power most portable electronics. They are already pretty compact but limited to rectangular or cylindrical blocks.

Researchers at Rice University in Houston, Texas, have come up with a technique to break down each element of the traditional battery and incorporate it into a liquid that can be spray-painted in layers on virtually any surface.

"This means traditional packaging for batteries has given way to a much more flexible approach that allows all kinds of new design and integration possibilities for storage devices," said Pulickel Ajayan, who leads the team on the project.

The rechargeable battery is made from spray-painted layers, with each representing the components of a traditional battery: two current collectors, a cathode, an anode and a polymer separator in the middle.

The paint layers were airbrushed onto ceramics, glass and stainless steel, and on diverse shapes such as the curved surface of a ceramic mug, to test how well they bond.

One limitation of the technology is in the use of difficult-to-handle liquid electrolytes and the need for a dry and oxygen-free environment when making the new device.

The researchers are looking for components that would allow construction in the open air for a more efficient production process and greater commercial viability.

Neelam Singh, who worked on the project, believes the technology could be integrated with solar cells to give any surface a stand-alone energy capture and storage capability.

The researchers tested the device using nine bathroom tiles coated with the paint and connected to each other. When they were charged, the batteries powered a set of light-emitting diodes for six hours, providing a steady 2.4 volts.

The results of the study were published on Thursday in the journal Nature Scientific Reports.

(Editing by Louise Ireland)

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Reuters: Science News: World awaits latest in hunt for Higgs particle

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World awaits latest in hunt for Higgs particle
Jun 28th 2012, 10:54

British physicist Peter Higgs speaks during a press conference on the sideline of his visit to the European Organization for Nuclear Research (CERN) in Geneva, April 7, 2008. REUTERS/Fabrice Coffrini/Pool

British physicist Peter Higgs speaks during a press conference on the sideline of his visit to the European Organization for Nuclear Research (CERN) in Geneva, April 7, 2008.

Credit: Reuters/Fabrice Coffrini/Pool

By Chris Wickham and Robert Evans

LONDON/GENEVA | Thu Jun 28, 2012 6:54am EDT

LONDON/GENEVA (Reuters) - Scientists hunting the Higgs subatomic particle will unveil results next week that could confirm, confound or complicate our understanding of the fundamental nature of the universe.

Seldom has something so small and ephemeral excited such interest. The theoretical particle explains how suns and planets formed after the Big Bang - but so far it has not been proven to exist.

The CERN research centre near Geneva will on July 4 unveil its latest findings in the search for the Higgs after reporting "tantalizing glimpses" in December.

Scientific bloggers and even some of the thousands of physicists working on the project are speculating that CERN will finally announce proof of the existence of the Higgs.

"It's still premature to say anything so definitive," says CERN spokesman James Gillies, adding the two teams involved are still analyzing data and even CERN insiders won't know the answer until the results from both are brought together.

But with plans for a news conference that will be beamed live around the world and coincide with a major particle physics conference in Melbourne, Australia, anticipation of a significant announcement is hard to avoid.

For Jordan Nash, a professor at London's Imperial College and a member of one of the teams looking for the Higgs, the excitement around the experiment is justified.

"We're trying to understand the fabric of the universe itself," he told Reuters. "It's a hugely fundamental piece of the mystery of how the universe is put together."

SMASHING WATERMELONS

A definitive 'we've found it' would be a surprise and a major scientific milestone.

"We too are holding our breath," says Pauline Gagnon, a Canadian physicist on one of the teams, in her latest blog.

The action takes place in the Large Hadron Collider, the world's biggest and most powerful particle accelerator, a 27-km (17-mile) looped pipe that sits in a tunnel 100 meters underground on the Swiss/French border.

Two beams of energy are fired in opposite directions around it before smashing into each other to create many millions of particle collisions every second in a recreation of the conditions a fraction of a second after the Big Bang.

The vast amount of data produced is examined by banks of computers. But it's a messy process. For all the billions of collisions, very few of them are just right for revealing the Higgs particle.

"It's like smashing watermelons together and trying to achieve a perfect collision for two of the pips inside," says Nash.

Last year's "glimpses" of the Higgs were from just a handful of collisions out of the many millions that were analyzed. Since then, the power inside the collider has been ramped up to increase the intensity of the particle smashing. This threw off more data between April and June than in the whole of last year.

"We're looking for something so rare, it's a sifting experiment," Nash said. "We just made a gigantic haystack and now we are looking for the needle".

IT'S A BIG UNIVERSE

The Higgs particle is a crucial plank of the Standard Model, which is the best explanation physicists have of how the universe works at the most fundamental level.

But the particle is theoretical, first posited in 1964 by British scientist Peter Higgs as the way matter obtained mass after the universe was created 13.7 billion years ago.

Without it, according to the theory, the universe would have remained a giant soup of particles. It would not have coalesced into stars, planets and life.

Even if its existence is finally proven, it will only apply to the relatively small part of the universe explained by the Standard Model. It won't tell us about so-called dark matter or dark energy, which scientists believe make up about 96 percent of the cosmos.

It could, however, be a step towards a theory of everything that encompasses dark matter and energy, as well as the force of gravity, which the Standard Model also does not explain.

Those early glimpses may of course not be borne out in the latest data, which would provoke serious head-scratching and debate about where to look next. They may discover the Higgs exactly as postulated.

But scientists say the most exciting news from CERN, whether it comes next week or later this year, would be the discovery of a type of Higgs particle but not quite as described in the Standard Model.

This, they say, could provide a road sign on where to look for answers on dark matter, dark energy and even esoteric concepts like parallel universes.

"Something more exotic could take us beyond the Standard Model and into the rest of the universe that we currently know nothing about," said James Gillies.

He said just as Albert Einstein's theories enveloped and built on the work of Isaac Newton, the work being done by the thousands of physicists at CERN has the potential to do the same. "It's where we'd like it to take us," he said.

WHO CARES?

In a hard-up world paying the bill for multiple financial crises, some question the value of big science projects like the Large Hadron Collider and scientists feel an ever increasing pressure to justify the expense to policymakers. The LHC cost about 3 billion euros to build.

CERN's highest profile gift to the real economy was the source code for the World Wide Web, written by scientist Tim Berners-Lee when he worked at the research centre in the 1990s.

Asked what the Higgs hunt could bestow on the world, Nash says the research is too leading edge and too nascent to say. At this point it's about the thirst for knowledge, something he argues the public well understands.

"We do bring a lot of things back," he says. "But when I talk to taxi drivers or builders they never ask that."

(Editing by Janet Lawrence)

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Wednesday, June 27, 2012

Reuters: Science News: "Blade Runner" still subject of scientists' debate

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"Blade Runner" still subject of scientists' debate
Jun 27th 2012, 17:07

By Patrick Lannin

Wed Jun 27, 2012 1:07pm EDT

(Reuters) - While South African athlete Oscar Pistorius attempts to become the first amputee runner to compete at the Olympic Games, scientists are still arguing whether his artificial limbs give him a critical advantage or not.

Pistorius, born without fibulas and who had his lower legs amputated when a baby, uses carbon fiber prosthetic running blades and is hoping to qualify for the 400 meters at the Games.

Pistorius beat the Olympic qualifying time of 45.30 in Pretoria in March but must repeat that performance in an international meeting before June 30 to make the team for the London Games which start on July 27.

Pistorius, who has a personal best is 45.07, won the 100, 200 and 400 gold medals at the 2008 Paralympic Games. He also became the first amputee to compete at the athletics world championships when he ran in Daegu, South Korea last year.

"The science is fully clear that ... Mr. Pistorius runs considerably faster with his artificial limbs," said Peter Weyand, associate professor of Applied Physiology and Biomechanics at Southern Methodist University in Dallas.

He said in an email that the findings, with Matthew Bundle, assistant professor at the University of Montana's Department of Health and Human Performance, also showed Pistorius had an advantage over one legged amputees.

Pistorius has already won a legal case to compete against able-bodied athletes after the Court of Arbitration for Sport in 2008 overturned a ban which had been imposed by the International Association of Athletics Federations (IAAF).

The court said its ruling applied only to Pistorius and only to the type of artificial limb he uses and that the IAAF had failed to prove its case.

The irony is that data used in support of Pistorius at the arbitration court came from a group which included Weyand and Bundle. They only made known their dissenting opinion later and five other scientists in the same group reject their arguments.

Icelandic company Ossur, which makes the carbon fiber limbs, and the athlete himself, are certain he has no advantage and that is it sheer hard work which is behind his success.

"I have been competing on the Ossur flex foot Cheetah since I first started in athletics in 2003," said Pistorius.

"The leg has not changed and I have not run on any other prosthetic sprinting leg. My advances in time are down to how hard I train," he added in an email.

The futuristic look of the limbs, which are curved like an upside-down hook and which affix via sockets to the stumps of his legs, have earned him the nickname "Blade Runner".

The science behind the limbs themselves is surprisingly simple and has barely changed since Pistorius first starting using them, according to Richard Hirons, a clinical prosthetist and specialist in sports feet at Ossur.

"The bottom line is that it minimizes the disadvantages," Hirons told Reuters. "He is basically on stilts, he has to take that into account, he has to think about the wind, he gets nervous when it rains.

"There is a big amount of extra effort required in the upper body to generate power, lift and compensation," he added.

CHEETAH INSPIRATION

Ossur, founded in 1971, makes many limbs and works with many Paralympians, but Pistorius is their highest profile client.

The limbs he uses, called the Flex Foot Cheetah, were developed by U.S. inventor Van Philips in the 1980s.

He had the bottom half of his left leg cut off by a motor boat when water skiing, but was a keen sportsman and was frustrated by the clunky prosthetic designs then available.

Ossur bought Philips' company in 2000 in an international expansion which has made it a leading global prosthetics firm, growing well beyond its Icelandic birthplace. Sales grew from $18 million in 1991 to $401 million in 2011.

Hirons said the limbs were curved carbon fiber, which were specially designed for high impact sports. The company also produces limbs with a more gentle curve for joggers, as well as feet and legs for daily use for ordinary people.

Also for non-athletes, the future is bionic limbs, combining small electronic motors and computer sensors.

Despite the findings of Weyand and Bundle, Ossur says the carbon fiber legs are much less efficient than real legs, ankles and muscles in absorbing the impact from running and returning energy back to the runner for forward movement.

"There is a huge amount of extra effort required in the upper body to generate power and lift and compensation," Hirons said of Pistorius.

SCHOLARLY DISPUTE

Weyand and Bundle disagree, setting out their views in a debate with their five fellow scientists who worked on the Pistorius case in an issue of the journal Applied Physiology in November 2009. They say the prosthetic limbs are lighter than legs and allow Pistorius to take quicker strides.

That meant he spent more time getting tread on the ground and less in the air, which in turn meant his athleticism needed to be less than able-bodied runners to reach the same speeds.

"We conclude that the moment in athletic history when engineered limbs outperform biological limbs has already passed," the two men wrote.

In a rebuttal, the other five scientists completely disagreed, writing that it was "common sense that amputation and prosthetic legs impair force generation".

They said the rapid leg swings could have resulted from training and Pistorius having to compensate for his disability.

Weyand told Reuters that he stuck to his views, which he said were backed up by scientific data.

While the scientists debate, Pistorius is still working to achieve his Olympic goal, though has fallen short so far.

"I have worked hard to achieve the Olympic qualification time - I have already run this time twice and my aim is to consistently run within this time ahead of the Olympics and I hope to be selected to represent South Africa," he told Reuters.

(Reporting by Patrick Lannin in Stockholm, Editing by Peter Rutherford)

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Tuesday, June 26, 2012

Reuters: Science News: Promoting health? It's all in the game

Reuters: Science News
Reuters.com is your source for breaking news, business, financial and investing news, including personal finance and stocks. Reuters is the leading global provider of news, financial information and technology solutions to the world's media, financial institutions, businesses and individuals. // via fulltextrssfeed.com
Promoting health? It's all in the game
Jun 26th 2012, 11:43

A screenshot showing the character Roxxi in the digital game Re-Mission is seen in this handout image provided to Reuters by the game's producer HopeLab. Gamification - turning boring, unpleasant but necessary tasks into an online game - is a new way of thinking gaining momentum among drugmakers and health campaigners. Roxxi, a feisty and fully-armed virtual nanobot, is billed as ''medicine's mightiest warrior'', and in Re-Mission she's fighting an epic battle deep inside the human body where she launches rapid-fire assaults on malignant cells. REUTERS/HopeLab/Handout

1 of 3. A screenshot showing the character Roxxi in the digital game Re-Mission is seen in this handout image provided to Reuters by the game's producer HopeLab. Gamification - turning boring, unpleasant but necessary tasks into an online game - is a new way of thinking gaining momentum among drugmakers and health campaigners. Roxxi, a feisty and fully-armed virtual nanobot, is billed as ''medicine's mightiest warrior'', and in Re-Mission she's fighting an epic battle deep inside the human body where she launches rapid-fire assaults on malignant cells.

Credit: Reuters/HopeLab/Handout

By Kate Kelland, Health and Science Correspondent

LONDON | Tue Jun 26, 2012 7:43am EDT

LONDON (Reuters) - Meet Roxxi - a feisty and fully-armed virtual nanobot. Billed as "medicine's mightiest warrior", she's fighting an epic battle deep inside the human body where she launches rapid-fire assaults on malignant cells.

Or, if it's not cancer but diabetes you're fighting, why not join Britney and Hunter, two digital kids whose adventures to other worlds are spurred on by regular and timely updates of your blood sugar levels.

They are a far cry from chemotherapy, diabetes medications, or aspirin, but Roxxi, Britney and Hunter are some of the buzz products from the brains of those who want to promote health and sell medicines.

Gamification - turning boring, unpleasant but necessary tasks into an online game - is a new way of thinking that is gaining momentum among drugmakers and health campaigners.

It's an idea that seeks to use natural human instincts - playing and learning - to help patients to get to know their illness better and adhere properly to treatment regimens or disease monitoring programs.

"We all grew up learning through play," said Christian Dawson, strategy director at Woolley Pau Gyro, a London-based healthcare advertising agency. "Gamification is a way pharma can use that basic human instinct to get the right information into peoples' heads."

FINDING FUN FOR SICK CHILDREN

For 10-year-old Eleanor Howarth being able to play while trying to deal with the shock of being diagnosed with juvenile diabetes, was literally a game changer.

The British schoolgirl was seven and a half when she was told she had the lifelong condition and, as a result, would need to prick and squeeze blood out of her own finger four times a day to check and register her blood glucose levels.

Faced with blank refusals from a terrified child, Eleanor's parents got hold of the "Didget" monitor made by German drugmaker Bayer .

It comes with a game called "Knock 'Em Downs" and can be plugged into a Nintendo DS - the games console beloved of millions of children - and rewards the patient/player for regular blood updates by adding points and new features.

"It turned something she was really quite fearful about into something that could be a bit of fun," said Eleanor's father Richard Howarth. Her mother Donna said "it changed her whole perspective on the diabetes."

Didget took its inspiration, in part, from Re-Mission, widely cited as one of the first successful health games.

Developed in 2006 by HopeLab, a non-profit U.S. organization focused on children's health, and featuring the tumor-fighting Roxxi, it is designed to give patients a sense of power and control over the disease and help them understand why they must have certain treatments and what those treatments will do.

But games are not just for kids.

CAN DIGITAL GAMES BE HEALTHY?

A recent report by analysts at Ernst and Young on trends in the global life science sector noted the rise of gamification in health and hailed its great potential.

"We enjoy playing games - they motivate us and give us feelings of accomplishment, purpose and social connectivity," the report said.

In a chapter dedicated to gamification, J. Leighton Read, a U.S. expert on health games argued that "at a time when health care is focused on outcomes and seeking sustainability, the case for gamification has never been stronger."

But can Big Pharma, traditionally so conservative and hampered by stricter marketing regulations than many other sectors, really win from this game?

Bayer, one of the early enthusiasts, now has some doubts. A spokeswoman for the German firm said it was no longer promoting the Didget monitor because of concerns about whether encouraging children to stay indoors playing computer games was the right health message to send out.

Since gamification is relatively new in health care, and even newer in the pharma sector, follow-up studies on its effects are sparse.

But research published in the journal Pediatrics found that children who played Re-Mission showed improved behavioral and psychological factors linked with successful cancer treatment.

Kieran Walsh, clinical director of BMJ Learning, an education division of the British Medical Journal group, says he's "not an enormous fan" of the term gamification because he fears it can sometimes trivialize medical education.

He prefers the term simulation which, in his field, uses many of the same ideas as gamification.

LEARNER CENTRED

Walsh sees the main use, and benefit, of games in this sector emerging from simulations that help doctors and other health professionals learn new skills, or keep up to date with the latest diagnostic guidelines or treatment protocols.

"Simulation is currently transforming medical education," he said. "It allows doctors to enhance and practice their skills as often as they like, unlike traditional learning which is often done via medical conferences where the learner is more passive and training is dependent on knowledge transfer."

"Modern medical education is becoming far more learner-centered, putting learners at the core and making them actively participate. One way of doing that is simulation."

Indeed major drugmakers, GlaxoSmithKline and Pfizer among them, have reported success with campaigns centered around gamification designed first to attract, and then teach, doctors and other health workers.

GSK won a marketing award for an online game called "Paper to Patient" designed to help doctors learn about important but rather tiresome policy changes on how to manage patients with an illness called chronic obstructive pulmonary disease.

And a Pfizer game called "Back in Play" - designed to help players spot early signs of a progressive form of arthritis called enclosing spondylitis - won an award for public education.

RUN YOUR OWN DRUG COMPANY

John Pugh is director of digital communications at the privately-held German drugmaker Boehringer Ingelheim and one of the market leaders in this field with games like HealthSeeker, a game to help patients learn more about diabetes.

He says it's early days, but sees great health potential in playing games - even if they are the online sort.

Pugh says gamification works for Boehringer on several levels - first as a way to better engage with patients who take the firm's medicines, second as a way to awareness about particular diseases in a wider population, and thirdly as way of boosting the reputation of the pharma industry.

That third ambition has inspired his most recent adventure into the gaming world - a game on the social networking platform Facebook all about how to run a pharmaceutical firm.

Called Syrum, the game puts the player in the shoes of a drug company executive trying to negotiate the minefield of how to discover and developing new medicines, decide which ones to pursue and fund through expensive and time-consuming clinical trials, and what to do about securing patents to secure profits.

"This industry often struggles to have a dialogue or an emotional link with people," Pugh told Reuters.

"So for us, it's natural to apply gamification, which taps into a fundamental of human nature - playing and making learning fun - to health care."

(Editing by Anna Willard)

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Saturday, June 23, 2012

Reuters: Science News: China astronauts mark first manual space docking

Reuters: Science News
Reuters.com is your source for breaking news, business, financial and investing news, including personal finance and stocks. Reuters is the leading global provider of news, financial information and technology solutions to the world's media, financial institutions, businesses and individuals. // via fulltextrssfeed.com
China astronauts mark first manual space docking
Jun 24th 2012, 05:30

1 of 12. Liu Yang, China's first female astronaut, waves during a departure ceremony at Jiuquan Satellite Launch Center, Gansu province, June 16, 2012.

Credit: Reuters/Jason Lee

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Friday, June 22, 2012

Reuters: Science News: U.S. close to seizing disputed dinosaur skeleton

Reuters: Science News
Reuters.com is your source for breaking news, business, financial and investing news, including personal finance and stocks. Reuters is the leading global provider of news, financial information and technology solutions to the world's media, financial institutions, businesses and individuals. // via fulltextrssfeed.com
U.S. close to seizing disputed dinosaur skeleton
Jun 22nd 2012, 20:32

An eight-foot tall, 24-foot long, 75% complete Tyrannosaurus bataar skeleton is seen in this undated handout photo from Heritage Auctions in New York. REUTERS/Heritage Auctions/Handout

1 of 4. An eight-foot tall, 24-foot long, 75% complete Tyrannosaurus bataar skeleton is seen in this undated handout photo from Heritage Auctions in New York.

Credit: Reuters/Heritage Auctions/Handout

By Marice Richter

Fri Jun 22, 2012 4:32pm EDT

(Reuters) - U.S. authorities said they expect this week to seize a 70-million-year-old dinosaur skeleton that was discovered in Mongolia more 65 years ago and now is stored in New York and at the center of an international legal dispute.

A federal judge in New York has signed a warrant that allows the U.S. Department of Homeland Security to seize the skeleton of the Tyrannosaurus bataar - an Asian cousin of the North American Tyrannosaurus rex - from Dallas-based Heritage Auctions.

"We should have it by the end of the week," said Luis Martinez, a spokesman for U.S. Immigration and Customs Enforcement.

The seizure will be a "major step forward" for the government of Mongolia, which is claiming sovereign ownership and seeking the skeleton's return, said Robert Painter, a Houston attorney who represents Mongolian President Elbegdorj Tsakhia.

The skeleton - 8 feet (2.4m) tall and 24 feet (7.3m) long - has been stored in crates in New York City since Heritage sold it at auction to an unidentified buyer for more than $1 million on May 20.

At the request of the Mongolian government, a U.S. District judge in Dallas issued a restraining order preventing the skeleton from being moved or the ownership transferred while the dispute is pending.

Manhattan U.S. Attorney Preet Bharara filed a lawsuit on Monday seeking the forfeiture of the nearly intact skeleton and its return to the Mongolian government.

In New York, U.S. District Judge Kevin Castel on Tuesday issued an order to seize the fossil, ruling there was probable cause it was subject to forfeiture under federal laws.

"From a legal standpoint, the U.S. government's lawsuit shifts the burden of proof from Mongolia to Heritage and others who might make a claim to its ownership," Painter said.

Heritage officials have said they will continue to cooperate with authorities. They say the skeleton was legally obtained and brought to auction by a reputable consignor.

"We believe our consignor purchased fossils in good faith, then spent a year of his life and considerable expense identifying, restoring, mounting and preparing what had previously been a much less valuable matrix of unassembled, underlying bones and bone fragments," Jim Halperin, co-chairman of Heritage Auctions, said in a statement. "We sincerely hope there is a just and fair outcome for all parties."

Federal officials said smugglers made false statements about the skeleton when it was imported into the United States from Britain in 2010. The skeleton did not originate in Britain nor was its value only $15,000 as claimed, they said.

The skeleton was discovered in 1946 during a joint Soviet-Mongolian expedition to the Gobi Desert in Mongolia's Omnogovi Province, Bharara said. Mongolia has had laws in place since 1924 prohibiting the export of dinosaur fossils that are considered national treasures and government property.

Heritage Auctions and the Mongolian government agreed in May to jointly investigate the ownership of the skeleton. Several paleontologists examined the skeleton several weeks ago and determined it was removed from the western Gobi Desert in Mongolia between 1995 and 2005.

(Editing by Daniel Trotta and Bill Trott)

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Wednesday, June 20, 2012

Reuters: Science News: U.S. close to seizing disputed dinosaur skeleton

Reuters: Science News
Reuters.com is your source for breaking news, business, financial and investing news, including personal finance and stocks. Reuters is the leading global provider of news, financial information and technology solutions to the world's media, financial institutions, businesses and individuals. // via fulltextrssfeed.com
U.S. close to seizing disputed dinosaur skeleton
Jun 21st 2012, 02:55

An eight-foot tall, 24-foot long, 75% complete Tyrannosaurus bataar skeleton is seen in this undated handout photo from Heritage Auctions in New York. REUTERS/Heritage Auctions/Handout

1 of 3. An eight-foot tall, 24-foot long, 75% complete Tyrannosaurus bataar skeleton is seen in this undated handout photo from Heritage Auctions in New York.

Credit: Reuters/Heritage Auctions/Handout

By Marice Richter

Wed Jun 20, 2012 10:55pm EDT

(Reuters) - U.S. authorities said on Wednesday they expect this week to seize a 70-million-year-old dinosaur skeleton that was discovered in Mongolia more than 65 years ago and now is stored in New York and at the center of an international legal dispute.

A federal judge in New York has signed a warrant that allows the U.S. Department of Homeland Security to seize the skeleton of the Tyrannosaurus bataar - an Asian cousin of the North American Tyrannosaurus rex - from Dallas-based Heritage Auctions.

"We should have it by the end of the week," said Luis Martinez, a spokesman for U.S. Immigration and Customs Enforcement.

The seizure will be a "major step forward" for the government of Mongolia, which is claiming sovereign ownership and seeking the skeleton's return, said Robert Painter, a Houston attorney who represents Mongolian President Elbegdorj Tsakhia.

The skeleton - 8 feet (2.4m) tall and 24 feet (7.3m) long - has been stored in crates in New York City since Heritage sold it at auction to an unidentified buyer for more than $1 million on May 20.

At the request of the Mongolian government, a U.S. District judge in Dallas issued a restraining order preventing the skeleton from being moved or the ownership transferred while the dispute is pending.

Manhattan U.S. Attorney Preet Bharara filed a lawsuit on Monday seeking the forfeiture of the nearly intact skeleton and its return to the Mongolian government.

In New York, U.S. District Judge Kevin Castel on Tuesday issued an order to seize the fossil, ruling there was probable cause it was subject to forfeiture under federal laws.

"From a legal standpoint, the U.S. government's lawsuit shifts the burden of proof from Mongolia to Heritage and others who might make a claim to its ownership," Painter said.

Heritage officials have said they will continue to cooperate with authorities. They say the skeleton was legally obtained and brought to auction by a reputable consignor.

"We believe our consignor purchased fossils in good faith, then spent a year of his life and considerable expense identifying, restoring, mounting and preparing what had previously been a much less valuable matrix of unassembled, underlying bones and bone fragments," Jim Halperin, co-chairman of Heritage Auctions, said in a statement. "We sincerely hope there is a just and fair outcome for all parties."

Federal officials said smugglers made false statements about the skeleton when it was imported into the United States from Britain in 2010. The skeleton did not originate in Britain nor was its value only $15,000 as claimed, they said.

The skeleton was discovered in 1946 during a joint Soviet-Mongolian expedition to the Gobi Desert in Mongolia's Omnogovi Province, Bharara said. Mongolia has had laws in place since 1924 prohibiting the export of dinosaur fossils that are considered national treasures and government property.

Heritage Auctions and the Mongolian government agreed in May to jointly investigate the ownership of the skeleton. Several paleontologists examined the skeleton several weeks ago and determined it was removed from the western Gobi Desert in Mongolia between 1995 and 2005.

(Editing by Daniel Trotta and Bill Trott)

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