Thursday, January 19, 2012

Ulcer-causing bacteria baffled by mucus: Researchers discover impact of viscoelasticity on collective behavior of swimming microorganisms

ScienceDaily (Jan. 18, 2012) ? Even the tiniest microscopic organisms make waves when they swim. In fact, dealing with these waves is a fact of life for the ulcer-causing bacteria H. pylori.

The bacteria are known to change their behavior in order to compensate for the waves created by other bacteria swimming around in the same aquatic neighborhood. From the relatively simple actions of these individual bacteria emerges a complex, coordinated group behavior.

A new study by engineering researchers at Rensselaer Polytechnic Institute demonstrates how introducing certain polymers -- like those found in human mucus and saliva -- into the environment makes it significantly more difficult for H. pylori and other microorganisms to coordinate. The findings raise many new questions about the relationship between the individual and group behaviors of bacteria. The study also suggests that human mucus, saliva, and other biological fluid barriers may have evolved to disrupt the ability of harmful bacteria to coordinate.

"In the human body, microorganisms are always moving around in mucus, saliva, and other systems that exhibit elasticity due to the presence of polymers. Our study is among the first to look at how this elasticity impacts the collective behavior of microorganisms like H. pylori," said lead researcher Patrick T. Underhill, assistant professor in the Howard P. Isermann Department of Chemical and Biological Engineering at Rensselaer. "What we found is that polymers do in fact have a substantial impact on the flows created by the swimming bacteria, which in turn makes it more difficult for the individual bacteria to coordinate with each other. This opens the door to new ways of looking at our immune system."

Results of the study are detailed in the paper "Effect of viscoelasticity on the collective behavior of swimming microorganisms," recently published by the journal Physical Review E.

Underhill's study, based on large-scale computer simulations, leveraged the power of the Rensselaer Computational Center for Nanotechnology Innovations (CCNI), one of the world's most powerful university-based supercomputers. These simulations involved creating a computer model of more than 110,000 individual H. pylori bacteria simultaneously occupying a small volume of polymer-infused liquid. The simulations captured all of the individual actions and interactions created as the bacteria swam through the liquid. The most difficult aspect of this kind of simulation, Underhill said, is to identify collective behaviors and extract relevant conclusions from the massive amount of data generated.

See a video of a simulation at: http://youtu.be/Yvc_3xncpME

In addition to computer simulations, Underhill employed theoretical models to understand how the addition of elasticity to liquid impacts the waves created by swimming H. pylori and, in turn, the collective behavior of a large group of the bacteria. Bacteria like H. pylori are known as pushers, as they propel themselves through water by twisting the long helical filaments that trail behind them.

Rensselaer chemical engineering graduate student Yaser Bozorgi is a co-author of the paper.

The study was funded by the National Science Foundation (NSF). In 2010, Underhill received a prestigious NSF Faculty Early Career Development Award (CAREER) to support his transport phenomena research.

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The above story is reprinted from materials provided by Rensselaer Polytechnic Institute (RPI), via Newswise.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Yaser Bozorgi, Patrick Underhill. Effect of viscoelasticity on the collective behavior of swimming microorganisms. Physical Review E, 2011; 84 (6) DOI: 10.1103/PhysRevE.84.061901

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://www.sciencedaily.com/releases/2012/01/120118111708.htm

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Wednesday, January 18, 2012

Italian coastguard heard pleading with liner captain (Reuters)

GIGLIO, Italy (Reuters) ? Italian coastguards pleaded angrily with the captain of a stricken super-liner to return to his ship, according to recordings released on Tuesday as divers found five more bodies in the half-submerged wreck of the Costa Concordia.

The discoveries took the known death toll to 11, leaving 24 people, including a number of German tourists, unaccounted for four days after the giant cruiser carrying more than 4,200 passengers and crew was ripped open by rocks off a Tuscan island.

Captain Francesco Schettino is in jail, blamed by his employer for risking thousands of lives and half a billion dollars of ship in a reckless display of bravado.

On Tuesday, rescuers used explosives to blast through the maze of luxury cabins, bars and spas, fast losing hope of finding anyone alive. Inside the wreck heavy floating furniture and pitch-black conditions made conditions very dangerous.

A tearful firefighter told Reuters: "Virtually all the dry part has been searched. It would need a miracle to find anyone alive in the wet part." No survivors have been found since Sunday.

Before the five bodies were found on Tuesday, those missing were 14 German, five Italian, four French and two American passengers and four crew from Italy, Peru, India and Hungary.

Schettino is accused of multiple manslaughter, causing a shipwreck by sailing too close to shore and abandoning ship before all his passengers and crew scrambled off.

At an appearance before a magistrate, Schettino said he believed he should be credited with saving "hundreds, if not thousands of lives" because he brought the ship close to shore after it hit a rock, lawyer Bruno Leporatti said.

Schittino also claimed that he did not abandon the ship while passengers were still aboard.

But newspaper Corriere della Sera released what it said was a recording of ship-to-shore radio communications in which the enraged coastguards repeatedly order him back on board.

"Listen Schettino, perhaps you have saved yourself from the sea, but I will make you look very bad. I will make you pay for this. Dammit, go back on board!" one coastguard says.

Speaking by radio from a lifeboat, Schettino pleads: "Do you realize that it is dark and we can't see anything?"

The coastguard shouts back: "So, what do you want to do, to go home, Schettino?! It's dark and you want to go home? Go to the bow of the ship where the ladder is and tell me what needs to be done, how many people there are, and what they need! Now!"

Officials did not confirm the tape's origins but other shouts heard in the background added authenticity. The Coast Guard official on the tape told a local newspaper he could tell by the "tone of the captain's voice" that something was very wrong. Schettino's lawyer said he would not comment.

The owners of the 114,500-tonne vessel - the biggest passenger ship ever wrecked and twice the tonnage of the Titanic - accused their captain of causing the disaster by sharply deviating from the charted course.

The ship foundered after striking a rock as dinner was being served on Friday night. The owners say the captain swung inshore to "make a bow" to the islanders, who included a retired Italian admiral. Investigators say it was within 150 meters of shore.

Schettino has denied the charges and was questioned by magistrates on Tuesday morning.

Three controlled blasts were detonated early on Tuesday to allow firefighters and scuba divers to enter inaccessible parts of the ship.

"Now we will have better access to the gathering points on the ship, where it seems there might be more chance of finding someone, dead or alive," said firefighters' spokesman Luca Cari.

"They will take micro-cameras in there, and we will be simultaneously looking at the few remaining dry areas and also the wet areas," he said. The weather improved slightly from Monday but seas were still choppy.

GIANT PLEASURE PALACE

The giant cruise ship, a floating pleasure palace of bars, spas, giant state rooms and tennis courts, slid a little on Monday, threatening to plunge 2,300 tonnes of fuel below the Mediterranean waters of the surrounding marine nature reserve.

This forced a brief suspension of rescue efforts, which were also halted during the night.

Hopes of finding more survivors are fast fading, more than three days after the 290-metre long ship rolled on its side with a long gash in its hull.

Most of the passengers and crew survived despite hours of chaos and confusion after the collision. The alarm was raised not by an SOS from the ship but mobile phone calls from passengers on board to Italian police on the mainland.

Video taken from a rescue helicopter in the early hours of Saturday, using a night vision camera, showed an extraordinary scene of dozens of passengers being gingerly lowered on ropes down the upturned hull of the ship into rescue boats.

The wreck, with a long gash below the waterline, looms over the normally tranquil island of Giglio.

Senior firefighter Luciano Roncalli told Reuters that all the unsubmerged areas of the liner had been searched.

Environment Minister Corrado Clini said he would declare a state of emergency because of the risk that the ship's fuel would leak into the pristine Tuscan Archipelago National Park. No fuel spillage has been detected so far, he said.

Clini said on Tuesday morning that he had given the salvage company until Wednesday to come up with a plan to remove the fuel and 10 days for a plan to remove the ship.

SKIPPER DENIES CHARGES

"You don't have to be a Nobel prize winner to understand that a ship of that size should stay far from the coast," Clini said on television on Tuesday morning.

Schettino's lawyer issued a statement saying the skipper was "broken up, troubled and saddened by the loss of life." But he believed he had saved many lives by carrying out a difficult emergency maneuver with anchors after the accident, which turned the ship closer to the shore.

The father of the ship's head waiter told Reuters his son had telephoned him before the accident to say the crew would salute him by blowing the ship's whistle as they passed close by Giglio, where both the waiter, Antonello Tievoli, and his 82-year-old father Giuseppe live.

Costa Cruises chief executive Pier Luigi Foschi on Monday blamed errors by Schettino for the disaster. He told a news conference the company would provide its captain with any assistance he required. "But we need to acknowledge the facts and we cannot deny human error," he added. [ID:nL6E8CG2T6]

Foschi said company vessels were forbidden to come closer than 500 meters to the Giglio coast. Schettino denies being too close and says the rock he hit was not marked on charts.

The ship is resting in about 20 meters (60 feet) of water but could go down by as much as 130 meters if it shifts free from the rocks.

(Additional reporting by Silvia Ognibene, Silvia Aloisi and Kate Hudson, Writing by Barry Moody and Philip Pullella; Editing by David Stamp)

Source: http://us.rd.yahoo.com/dailynews/rss/world/*http%3A//news.yahoo.com/s/nm/20120117/wl_nm/us_italy_ship

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Ultrabook: The New Most Meaningless Word in Tech (Updated) [Laptops]

Although we weren't flooded by ultrabooks at CES to quite the extent we expected, the word itself was unavoidable. The skinny-sized laptops abounded, each alluring in its own way! That's when we realized that there's no such thing as an ultrabook. And we shouldn't pretend that there is. More »


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/uVUT0e5jzv4/theres-no-such-thing-as-an-ultrabook

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Tuesday, January 10, 2012

JohnRobel: @YanniRobel honey, Andra wants you to get an autograph of a giraffe when you go the the animal kingdom. #SQLrun

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'Badges' Earned Online Pose Challenge to Traditional College Diplomas

The spread of a seemingly playful alternative to traditional diplomas, inspired by Boy Scout achievement patches and video-game power-ups, suggests that the standard certification system no longer works in today's fast-changing job market.

Educational upstarts across the Web are adopting systems of "badges" to certify skills and abilities. If scouting focuses on outdoorsy skills like tying knots, these badges denote areas employers might look for, like mentorship or digital video editing. Many of the new digital badges are easy to attain?intentionally so?to keep students motivated, while others signal mastery of fine-grained skills that are not formally recognized in a traditional classroom.

At the free online-education provider Khan Academy, for instance, students get a "Great Listener" badge for watching 30 minutes of videos from its collection of thousands of short educational clips. With enough of those badges, paired with badges earned for passing standardized tests administered on the site, users can earn the distinction of "Master of Algebra" or other "Challenge Patches."

Traditional colleges and universities are considering badges and other alternative credentials as well. In December the Massachusetts Institute of Technology announced that it will create MITx, a self-service learning system in which students can take online tests and earn certificates after watching the free lecture materials the university has long posted as part of its OpenCourseWare project.

MIT also has an arrangement with a company called OpenStudy, which runs online study groups, to give online badges to students who give consistently useful answers in discussion forums set up around the university's free course materials.

But the biggest push for badges is coming from industry and education reformers, rather than from traditional educational institutions. Mozilla, the group that develops the popular Firefox Web browser, is designing a framework to let anyone with a Web page?colleges, companies, or even individuals?issue education badges designed to prevent forgeries and give potential employers details about the distinctions at the click of a mouse. Hundreds of educational institutions, traditional and nontraditional, have flocked to a $2-million grant program run in coordination with the John D. and Catherine T. MacArthur Foundation, seeking financial support to experiment with the educational-badge platform.

Employers might prefer a world of badges to the current system. After all, traditional college diplomas look elegant when hung on the wall, but they contain very little detail about what the recipient learned. Students using Mozilla's proposed badge system might display dozens or even hundreds of merit badges on their online r?sum?s detailing what they studied. And students could start showing off the badges as they earn them, rather than waiting four years to earn a diploma.

"We have to question the tyranny of the degree," says David Wiley, an associate professor of instructional psychology and technology at Brigham Young University. Mr. Wiley is an outspoken advocate of so-called open education, and he imagines a future where screenfuls of badges from free or low-cost institutions, perhaps mixed with a course or two from a traditional college, replace the need for setting foot on a campus. "As soon as big employers everywhere start accepting these new credentials, either singly or in bundles, the gig is up completely."

The idea is already well established in some computer-programming jobs, with Microsoft and other companies developing certification programs to let employees show they have mastered certain computer systems.

Some observers see a darker side, though, charging that badges turn all learning into a commodity, and thus cheapen the difficult challenge of mastering something new. Rather than dive into an assignment out of curiosity, many students might focus on an endless pursuit of badges, argues Alex Reid, an associate professor of English at the University at Buffalo. "The presence of a badge could actually be a detriment to an otherwise genuine learning experience," he wrote on his blog earlier this year.

But in an interview, he agreed that in today's tough job market, people are searching for alternatives that better reflect the range of their qualifications.

What is the best way to certify higher learning? And who gets to decide?

The Lure of the Badge

When it comes to biology, Catherine Lacey is a Level 40 Hero. That's her ranking on OpenStudy, where the University of Western Australia student spends up to 30 hours per week answering homework questions posed by students around the world. The level indicates time spent on the site, and Hero is the hardest-to-attain badge. If you think of helping with homework as a game, she's got the high score.

The 20-year-old first stumbled upon the OpenStudy site while surfing the Web. She was hooked after an answer she tossed out yielded an online medal signaling that her knowledge had served as a lifeline to a struggling student. "I said, Wow, people think I'm smart," she recalls. As she spent more time on the site, "achievements start popping up," she says. Now her online persona on OpenStudy, TranceNova, has racked up a page of merit badges, including one for helping people with MIT open biology courses.

She receives no pay for all the time she logs on the site. A paycheck would be "an honor" but would make the experience feel like toil, she told me. "I don't see it as a labor, I see it as no different than going out to the movies with friends." Going out with friends is one thing she doesn't do much (calling herself "not that social"), so for Ms. Lacey the site is an important outlet.

So far that Hero badge isn't listed on the student's r?sum?, but she might add it if she ever applies for a teaching job. "It's a measure of how much time and effort I've put into this and what other people think of me."

That's just what OpenStudy's designers hoped for. One of them, Preetha Ram, argues that "massively multiplayer" online games like World of Warcraft do a better job exciting players about learning complicated controls and fictional missions than professors do motivating students in the classroom. "We've been called a massively multiplayer study group," she says with apparent pride at the comparison. Ms. Ram is no gamer herself, though?she has spent her career in academe, and she is on leave from her job as associate dean for pre-health and science education at Emory University.

She wanted to take her ideas about peer-to-peer learning beyond her own classroom in Atlanta, so she helped start the company, which now has offices in Georgia and in Palo Alto and backing from the National Science Foundation, the Bill & Melinda Gates Foundation, and the venture-capital firm Learn Capital.

Far from replacing university degrees, her goal is to fill a gap by recognizing soft skills that traditional grades and diplomas often miss. Students who help out other students in face-to-face study groups have no way to show the effort they invested there, she contends. "We all know that teaching someone is the best way to deepen your understanding of the concept," she argues. And she says that crafting a clear answer to explain tough material to a peer is a the kind of soft skill that employers say they increasingly value.

Winning recognition for underappreciated educational activities drives many of the college officials who are experimenting with badges.

The University of Southern California's service-learning division, for example, is among the first-round winners of the MacArthur grant to try the new badge platform. Called the Joint Educational Project, the USC program works with professors to run community-service projects that grant students extra credit for volunteer work.

"The service-learning community has struggled with how to identify and recognize the outcomes that students learn, like civic knowledge and diversity," explains Susan Harris, an associate director of the project.

One of its proposed badges would recognize "Mentorship." Ms. Harris hopes such a badge would carry more cachet than simply listing volunteer work on a r?sum?.

Credential Overload?

Throwing open educational certification and multiplying the number of skills recognized could lead to r?sum? overload, though.

A world of badges would also create extra work for both job applicants trying to organize and present their badges and to employers trying to judge their actual worth. All badges could seem more flash than substance, like the "flair" worn by the waitress in the movie Office Space.

One thing badge proponents I talked with seemed surprisingly blas? about was the possibility of falsely claimed skills and certificates.

"Seventy-five percent of most r?sum?s already have at least one very stretched truth," says Sheryl Grant, who helps run the MacArthur grant competition, through her work with Hastac, or the Humanities, Arts, Science, and Technology Advanced Collaboratory. "People say, 'You could just make up a badge or give yourself a grade.' Yeah, but if you got caught for that you're taking a chance just like anything else." And technical systems would ensure that students earned the digital badges they claim.

Accreditors say they haven't looked into the issue seriously?at least not yet.

"The idea of badges hasn't risen to our radar as a concept, but I think we can't ignore it," says Belle S. Wheelan, president of the Commission on Colleges of the Southern Association of Colleges and Schools. "The whole idea of learning beyond high school has changed," she adds. "College used to indicate that not only did you have a skill set in a particular area, but that you gained a body of knowledge that made you a well-rounded person. People don't care about being well-rounded anymore, they just want to get a job."

Fundamentally, badges are all about perception, so it's difficult to predict whether the key players?employers and job applicants?will click the like button on the concept.

"The biggest hurdle is the one I had, which is prejudice," says Cathy Davidson, a professor of interdisciplinary studies at Duke University and author of Now You See It: How the Brain Science of Attention Will Transform the Way We Live, Work, and Learn. She says she initially viewed educational badges as frivolous, but is now a leading proponent as a co-founder of Hastac.

"People seem to think they know what school is and they know what work is," she says. "We live in a world where anyone can learn anything, anytime, anywhere, but we haven't remotely reorganized our workplace or school for this age."

Source: http://feeds.chronicle.com/~r/chronicle/news/~3/q3ykMW-VRYU/

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Monday, January 9, 2012

In NH, GOP voters' questions often omit jobs (AP)

WINDHAM, N.H. ? Judging from the presidential forums being held all over New Hampshire ahead of Tuesday's Republican primary, the biggest threats to America appear to be online piracy, an insidious United Nations and "crony capitalism."

Rick Santorum, for instance, fielded questions for 48 minutes from a crowd of 600 in Windham on Thursday before anyone mentioned jobs, the issue that's supposed to dominate the 2012 elections. He got a dozen questions before that, including two about alleged U.N. subversion of U.S. sovereignty, one each about states' rights and Judeo-Christian values, and two about a treaty to "stop online piracy."

Iowa and New Hampshire ? small, largely rural and overwhelmingly white ? both have unemployment rates far below the national average of 8.5 percent. It may help explain their voters' interest in non-economic issues. And it may leave the states a bit out of touch with the anxieties afflicting so much of the country.

Many Iowa and New Hampshire residents care deeply about jobs, of course. And former Massachusetts Gov. Mitt Romney tends to get economic-related questions more often than do the socially conservative Santorum and the libertarian-leaning Ron Paul, a congressman from Texas.

But particularly in New Hampshire ? the "Live Free or Die" state, which has no income tax or sales tax ? the Republican presidential debate is deeply colored by issues that would leave many financially strapped Americans scratching their heads. It might not matter much in the long run. But it conceivably could give President Barack Obama's allies a chance to paint the GOP as out of touch with average Americans.

Some New Hampshire residents, hinting at conspiracies by the federal government or international powers, have urged the presidential candidates to embrace positions on the fringes of U.S. political debate. A man in Windham invoked Thomas Jefferson and James Madison in arguing that states should be able to ignore federal laws they consider unconstitutional.

"We had a war about nullification," Santorum reminded him, noting that the Civil War closed the lid on southern assertions of states' rights.

Another man, saying, "I fear my government," asked Santorum to condemn a new defense authorization bill that allows indefinite detention of terrorism suspects, even if they are U.S. citizens. The issue was raised at several New Hampshire events last week. Santorum said terrorism is a serious threat, but incarcerated U.S. citizens must have access to federal courts.

A teenage boy implored Santorum to look into the Stop Online Piracy Act, saying a friend of his might go to prison for five years for posting a cover version of a song on the Internet.

Such questions might raise few eyebrows at small forums sponsored by libertarians or tea party groups. But the Thursday event drew a large cross-section of people who packed Windham High School's sparkling and spacious auditorium.

Santorum isn't the only candidate fielding questions that rarely focus on jobs. Former House Speaker Newt Gingrich, at a military museum in Wolfeboro Saturday, was asked about numerous other topics, including whether he would padlock the Environmental Protection Agency and Education Department.

Gingrich said he probably would "order them to re-review every proposed regulation and keep them rope-a-doping for a while."

A Harvard student asked Gingrich how he could govern while refusing to raise taxes to help close budget deficits. Gingrich drew nods of approval when he replied: "I'm happy to cooperate. I'm not willing to compromise. Compromise in Washington means sell-out."

Romney, the favorite to win in New Hampshire, tends to draw more mainstream Republican audiences. Even he, however, has to field unexpected zingers.

At a spaghetti dinner in Tilton, a woman said she was struggling financially. "I know you're a multimillionaire," she said. "I read this morning you have four houses. Would you be willing to give up some of that so that the people in America could get some tax cuts?"

"That's a good idea," Romney said with a nervous laugh. "The best way I can help middle-income Americans is to become president of the United States, to cut taxes for middle-income Americans, which is what my proposal does, and to get jobs for middle-income Americans."

For the record, Romney said he owns only three houses.

___

Associated Press writers Kasie Hunt, Steve Peoples, Phil Elliott, Holly Ramer, Beth Fouhy and Shannon McCaffrey contributed to this report.

Source: http://us.rd.yahoo.com/dailynews/rss/politics/*http%3A//news.yahoo.com/s/ap/20120109/ap_on_el_pr/us_gop_campaign_voters__questions

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Sunday, January 8, 2012

Docs: Argentine leader's thyroid wasn't cancerous

Argentine President Cristina Fernandez didn't have cancer after all.

After having some of Argentina's leading cancer surgeons completely remove her thyroid gland, tests showed no presence of any cancerous cells in the tissue, presidential spokesman Alfredo Scoccimarro said Saturday.

"The Presidential Medical Unit has the satisfaction of communicating that the team at the Austral University Hospital informed that tissue studies ruled out the presence of cancerous cells in the thyroid glands, thus modifying the initial diagnosis," Scoccimarro said.

Fernandez doesn't even have to swallow the radioactive iodine that patients usually take after thyroid cancer surgery, to make sure any remaining cancer cells are killed, the spokesman said.

Fernandez, who underwent the surgery Wednesday just 25 days after beginning her second term, is out of the hospital and recovering at the presidential residence in suburban Olivos.

The trouble is that without her thyroid gland, the 58-year-old leader faces a lifetime of hormone replacement therapy.

Preoperative thyroid cancer diagnoses are notoriously difficult. Experts say figuring out whether growths are benign or malignant may be impossible without removing at least part of thyroid, and many doctors opt for removing the entire gland just to be sure.

In the president's case, it took postoperative tests to show that the cells in question were "adenoma" and not "carcinoma."

Fernandez's spokesman said the president thanked the medical team led by the hospital's surgery chief, Dr. Pedro Saco, an expert in cancers of the head and neck. Later Saturday, she added her own thoughts in a tweet, saying: "Now from Olivos, we thank all the people, citizens, activists and personalities, for the signs of affection and concern."

The news prompted raucous cheers and chants from several hundred supporters holding vigil for days outside the hospital, carrying signs saying "Be Strong Cristina!"

The idea that she had cancer had worried many Argentines, who re-elected her with a 54 percent landslide in October in part because none of her rivals seemed as capable of maintaining economic growth and social stability.

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Since she and her late husband and predecessor as president, Nestor Kirchner, began governing in 2003, Argentina has come back strong from a disastrous world-record debt default and currency devaluation a year earlier. The economy has grown at an average annual rate of 7.6 percent, poverty and unemployment are down and the wealth gap has narrowed. Their administrations have transferred billions of dollars to the poor through social programs.

But their style of rule has been highly personal, concentrating power in a very small circle of loyal advisers. Kirchner's sudden death of a heart attack in 2010 during his wife's first term left many Argentines worried about whether Fernandez could maintain the couple's model of governing, and the cancer diagnosis renewed those fears.

___

Follow Michael Warren on Twitter at http://twitter.com/mwarrenap

Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Source: http://www.msnbc.msn.com/id/45912986/ns/world_news-americas/

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New data finds regions of North America have remained extremely stable for more than one billion years

New data finds regions of North America have remained extremely stable for more than one billion years

Friday, January 6, 2012

Like lines in a deeply weathered face, the cracks and fissures in the Earth?s crust reveal a long and tumultuous lifetime. Massive continent-bearing plates have come together and broken apart, setting off earthquakes and volcanic eruptions that have fragmented underlying rock, changing the face of the planet over billions of years.

Despite a geologically fractious history, Earth?s rigid outer layer, or lithosphere, retains ancient sections called cratons in which rocks have been left relatively undisturbed since they formed billions of years ago. These cratons typically occur at the center of continental landmasses, and contain some of Earth?s oldest rocks. How these cratons have survived on Earth?s surface, avoiding destruction by both plate-tectonic processes and erosion over billions of years, has been of interest to geologists for decades.

In a new paper published today in Science, researchers at MIT have reconstructed the ancient history of the Wyoming Province, one of the oldest fragments within the North American craton. The team found that at this site, the continental crust experienced a short, intense period of erosion between 1.8 and 1.5 billion years ago before settling into a more stable period that has persisted to the present day. They did this by developing a novel technique to pinpoint when continents transition from high to low rates of erosion, which they say could also be used in other parts of the world to reconstruct similar histories.

?In our continental masses, the most stable regions have been exactly this way for billions of years,? says lead author Terrence Blackburn, a graduate student in MIT?s Department of Earth, Atmospheric and Planetary Sciences (EAPS). ?Today the North American craton is eroding very slowly, and our data tell us regions like that have been behaving like that for vast amounts of Earth?s history.?

At the crust of the matter

Blackburn worked with colleagues at MIT and the University of Colorado to investigate samples from the North American craton in a region of Montana where two continental fragments collided 1.8 million years ago, forming a mountain range. Scientists have found that over time the mountain range eroded ? first quickly, then much more slowly, over a billion years or more.

To pinpoint exactly when this transition in erosion happened, the group worked to reconstruct the thermal history of lower crustal xenoliths ? fragments of crust that resided deep within the lithosphere for billions of years before relatively recent volcanic activity brought them to the surface. Blackburn and his colleagues reasoned that the rate of erosion on the surface affects the amount of heat escaping from deeper in Earth?s crust: Like removing one?s hat, eroding a mountaintop lets more heat escape. The team then developed a new technique to determine the rate at which these xenoliths cooled over more than a billion years.

The researchers reconstructed the thermal history of these once-deeply buried samples, using a radiometric dating technique that estimates the time at which rocks form. The technique measures the radioactive decay of uranium into lead to establish an absolute age of events in Earth history.

In a slight twist on the technique, Blackburn and his colleagues focused on dating minerals that lose radioactive lead at high temperatures ? the hotter a rock, the more lead diffuses out. Only when the rock cools will the mineral begin to retain lead, effectively starting a radiometric ?clock.? This temperature-sensitive dating technique is called ?thermochronology.? By establishing the timing and rate of cooling within the lithosphere, the team was able to reconstruct the thermal evolution of the lithosphere, and infer the amount of erosion the region experienced.

?This data set we have tells us for the first time what is the maximum duration at which fast erosion of topographically high mountains can last,? Blackburn says. ?It?s just a fraction of the craton?s lifetime, three hundred million years at most, before the mountain belts are flattened, and after that, erosion is very slow.?

Blackburn says the new technique may be used to reconstruct the histories of other continental masses.

?Cratonic regions constitute areas of long term stability,? says Troy Rasbury, assistant professor of geosciences at the State University of New York, Stony Brook, who was not involve in the study. ?The stability is not a surprise, but the extremely low rates of uplift is a surprising result. This approach is very applicable to other craton regions and it will be fascinating to see if they all give similar results.?

The paper?s other authors include EAPS professor Sam Bowring; EAPS assistant professor J. Taylor Perron; EAPS research associate Francis Dudas; and Kevin Mahan and Katherine Barnhart from the University of Colorado.

###

MIT: http://www.mit.edu

Thanks to MIT for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

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Source: http://www.labspaces.net/116519/New_data_finds_regions_of_North_America_have_remained_extremely_stable_for_more_than_one_billion_years

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Saturday, January 7, 2012

Levitating Fruit Flies To Learn About Space Travel

Physicist Richard Hill and colleagues at the University of Nottingham have a powerful magnet that they have used to levitate fruits, beer and most recently, fruit flies. It's a low-cost way to study the effects of zero gravity on biological systems, Hill says.

Source: http://www.npr.org/2012/01/06/144794039/levitating-fruit-flies-to-learn-about-space-travel?ft=1&f=1007

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Samsung Galaxy Note for AT&T: press shots confirm what you already knew

tyAs if you weren't convinced that Samsung's almost-certainly-gigantic Galaxy Note was coming to AT&T, well... good luck refuting this. Just a day after an accessory vendor seemingly outed the truth, PocketNow has stumbled upon what appears to be the first legitimate press images for the Gingerbread-based handset. It's going by SGH-I717 internally, and it'll purportedly boast a 5.3-inch display (1,280 x 800), a 1.4GHz Exynos processor and a promise to get its user all kinds of stares. As for a release date? Betters might place a few bills on Valentine's Day -- we'll let you peer some more and ponder why.

Samsung Galaxy Note for AT&T: press shots confirm what you already knew originally appeared on Engadget on Fri, 06 Jan 2012 15:45:00 EDT. Please see our terms for use of feeds.

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Source: http://www.engadget.com/2012/01/06/samsung-galaxy-note-att-press-images-leaked/

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?American values, or Chinese? anti-Huntsman ad asks while showing Republican?s adopted daughters

Republican presidential hopeful Jon Huntsman and members of his family expressed outrage on Friday at an advertisement targeted at his adopted daughters by a group supporting rival Ron Paul.

An online ad authored by ?NHLiberty4Paul? shows footage of Mr. Huntsman with daughters Gracie, who was adopted from China, and Asha, adopted from India, when they were infants.

More related to this story

?American values. Or Chinese,? the ad asks to a soundtrack of Chinese music. It calls Mr. Huntsman ?the Manchurian Candidate? and ends with an image of Mr. Huntsman dressed as China?s former communist leader Mao Zedong, and the words ?Vote Ron Paul.?

Mr. Paul, a Texas congressman, disavowed the ad during an interview on Friday on CNN, but said he could not control the actions of all his supporters.

?I couldn?t even hear it, haven?t looked at it, but people do that, and they do it in all campaigns,? Mr. Paul said.

At a campaign appearance in Concord, New Hampshire, Mr. Huntsman, who was U.S. ambassador to China until April before jumping into the Republican race, termed the ad ?just stupid? and ?political campaign nonsense.?

?If someone wants to poke fun at me, that?s OK,? said Mr. Huntsman, who trails in most polls in the Republican nominating contest. ?What I object to is bringing forward pictures and videos of my adopted daughters and suggesting there?s something sinister there.?

The second oldest of Mr. Huntsman?s seven children, Abby Huntsman Livingston, denounced the ad on Fox News Channel?s ?America Live? broadcast.

?It is unfortunate that the political conversation has become this vile. In our family, we put ourselves on the national stage and we expect to get everything and anything. Unfortunately, I think this video goes a bit far,? Ms. Livingston said. ?My two little sisters are the love of my dad?s life.?

Gracie Mei Huntsman, now 12, was found abandoned in a vegetable market in China at 6 months old, and adopted by Mr. Huntsman and his wife, Mary Kaye. She has been a fixture on the campaign trail, often referred to by her father as ?our senior foreign policy adviser.?

Asha, now 6, was abandoned in a field in India the day she was born, Ms. Livingston said.

Also weighing in was Cindy McCain, the wife of 2008 Republican presidential nominee John McCain. ?I deeply resent the video made using the adopted daughters of@jonhuntsman,? Ms. McCain wrote on Twitter. ?@ronpaul shame on you. This has shades of 2000 all over it.?

During John McCain?s failed 2000 campaign for the Republican nomination, automated phone calls referred to the Arizona senator fathering an out-of-wedlock ?black baby,? apparently in reference to the McCains? adopted Bangladeshi daughter.

Source: http://feedproxy.google.com/~r/TheGlobeAndMail-International/~3/8ZlcykCV-WE/

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Video: How can Romney convince N.H. conservatives to support him?

Joining a gym in 2012? How to avoid gimmicks

Planning to get fit in 2012? You aren?t alone: 12 percent of new gym members join in January, with some clubs seeing an increase of 30 to 50 percent. Don?t get roped into paying for a membership you won?t use Follow these five tips to save money, avoid industry gimmicks, and shed holiday pounds.

Source: http://www.msnbc.msn.com/id/3036697/vp/45891995#45891995

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Friday, January 6, 2012

Hot Water (talking-points-memo)

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Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/182963934?client_source=feed&format=rss

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Edgerton set, Chastain in talks for Bigelow's bin Laden film (Reuters)

LOS ANGELES (TheWrap.com) ? Kathryn Bigelow and Mark Boal's movie about the hunt for Osama bin Laden is loading up on stars.

Joel Edgerton has been locked for a starring role in the film, TheWrap has confirmed. Also, Jessica Chastain, Mark Strong and Edgar Ramirez are in talks to join, TheWrap has also confirmed.

The actors would join previously confirmed castmembers including Tom Hardy, Idris Elba, Chris Pratt and Guy Pearce.

The still-untitled film is due December 19, shortly after the presidential election. It will focus on the Navy SEALs' mission to capture and kill Osama bin Laden, and the battles that resulted in his death on his compound in early May.

The film has drawn flak from Republican politicians. In a letter released Thursday, Rep. Peter King said the Office of the Inspector General at Defense is investigating whether Bigelow and Boal -- in preparation for the script -- received classified information regarding bin Laden's death. The White House has denied the allegations.

The bin Laden project, which has been in development since 2008, will be distributed in the U.S. by Sony.

Boal, a war journalist who wrote Bigelow's Best Picture-winning "The Hurt Locker," is behind the script. He and Bigelow, who also teamed for "The Hurt Locker," are producing the bin Laden project, along with Annapurna Picture's Megan Ellison, and executive producer, Greg Shapiro.

"With the death of Osama bin Laden, this film could not be more relevant. Kathryn and Mark have an outstanding perspective on the team that was hunting the most wanted man in the world," Sony Pictures Co-Chair Amy Pascal said in a statement released after bin Laden's death.

Several bin Laden pictures are in the works, including films that reportedly involve such top-shelf talents as Oliver Stone and George Clooney.

Source: http://us.rd.yahoo.com/dailynews/rss/movies/*http%3A//news.yahoo.com/s/nm/20120106/film_nm/us_osamabinladen_film

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Forsyth Mayor John Howard Sworn In

Story Created: Jan 3, 2012 EST

Story Updated: Jan 3, 2012 at 11:33 PM EST

Forsyth residents welcome in their new mayor Tuesday night.

John Howard was sworn in as Mayor of Forsyth at the first city council meeting of the year.

John Howard?s friends and family joined Forsyth City officials for the official swearing in ceremony at the City of Forsyth?s City Hall Annex.

Mayor Howard got right to business as he called the council meeting to order.

Source: http://www.newscentralga.com/news/local/Forsyth-Mayor-John-Howard-Get-Sworn-In-136633698.html

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Cuba criticizes Twitter for Fidel death rumor

(AP) ? State media on Wednesday accused the social networking site Twitter of helping spread a rumor that former Cuban leader Fidel Castro had died, and criticized anti-Castro expatriates it dubbed "necrophiliac counterrevolutionaries" for jumping on the story.

An article on the state-run Cubadebate Web site accused Twitter of allowing an account holder with the sign-on "Naroh" to start the rumor on Monday from an Italian server, possibly after it was taken over by a "robot." It says the account was then quickly deactivated.

It said Twitter then helped spread the disinformation by allowing the hash tag "fidelcastro" to become a trending topic. It briefly became the fourth most popular in the world as it drew many more people to the subject.

The site also accused Twitter of censoring subjects in the past that were in favor of the Cuban government.

A Twitter spokesperson, Jodi Olson, said the company had no comment on the specifics of Cuba's complaint, but added "as you know, we don't mediate content." Rumors that a celebrity or other public figure is dead are common on social media sites and can spread quickly because of their nature.

"Naroh," whose account was in active use on Wednesday, was one of more than 50 Twitter users to retweet a message that was a joke in fact casting doubt on the rumors of Castro's death. He and others were posting other, mostly sarcastic, messages about the rumor at the same time.

The account's owner lists his name as "Naroh - David Fdez," and his biography identifies him as a 20-year-old living "between Asturias and Madrid" in Spain.

Reached via Twitter on Wednesday, the owner of the account reacted with shock and amusement. "Obviously I didn't start anything," he tweeted back to an AP reporter. Asked which of his tweets may have gotten Havana's attention, he said he had no idea, that his posts were jokes and that the topic was already trending when he got involved.

He then tweeted to his followers, in Spanish: "Cuba is blaming me for killing Fidel Castro on Twitter. Can I now consider myself a Twit-star?"

Cubadebate also blamed anti-Castro expatriates anxious to see Castro's demise for gleefully furthering the rumor, saying "necrophiliac counterrevolutionaries, aided by some media, immediately started to party."

Castro, 85, turned power over to his brother Raul in 2006 during an illness that nearly killed him. He is officially retired, though he occasionally publishes opinion columns.

In recent months, Castro has alluded to the limits of age, but has also taken pride in his longevity. Cuba boasts that along with besting the actuarial tables, the former Cuban leader has survived hundreds of assassination attempts at the hands of his enemies in the United States.

Cubadebate noted that a false story about Castro's demise was spread on the Internet and elsewhere back in August. On that occasion, there was even a computer virus embedded in a spam email titled "Fidel is Dead," which featured a doctored, grainy photograph of the former Cuban leader that appeared to show him lying in a coffin.

As usual, the Cuban government has declined to make any official comment about Castro's health. But the former leader hasn't been silent. On Dec. 31, he sent a get-well letter to a Cuban baseball star that was read over state television.

Cubadebate on Wednesday reiterated a refrain it used the last time the Castro rumors began, saying that the latest hubbub was spread by "people inventing things in the virtual world that even the CIA could not accomplish in real life."

___

Associated Press reporter Jonathan M. Katz in New York contributed to this report

___

Follow Paul Haven at www.twitter.com/paulhaven/

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/495d344a0d10421e9baa8ee77029cfbd/Article_2012-01-04-CB-Cuba-Fidel-Twitter-Rumor/id-9f7d2108679441d49af1f94502f2ec94

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Canl? Yay?n: Adobe, iPad ve Android i?in dijital yay?nc?l???n nas?l yap?laca??n? anlatacak

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Source: www.donanimhaber.com --- Wednesday, January 04, 2012
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Source: http://www.donanimhaber.com/Canli_Yayin_Adobe_iPad_ve_Android_icin_dijital_yayinciligin_nasil_yapilacagini_anlatacak-31099.htm

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Thursday, January 5, 2012

Food price inflation to ease on economic slowdown: FAO chief (Reuters)

ROME (Reuters) ? Food prices will not rise drastically in 2012 as they have in recent years, though no large drop is expected as a result of economic slowdown, the new director-general of the U.N.'s Food and Agriculture Organisation (FAO) said on Tuesday.

Jose Graziano da Silva, the Brazilian who replaced Senegal's Jacques Diouf at the helm of FAO at the start of 2012, said volatility in food markets was likely to continue due to economic instability and currency market fluctuations.

"Prices will not be going up as in the sense of the last 2-3 years, but will also not drop down. There may be some reductions, but not drastic," Jose Graziano da Silva told a news conference.

He said he did not expect the economic slowdown in Europe to impact funding for FAO's projects, but said it was likely to increase the number of people facing hunger in the world.

(Reporting By Catherine Hornby)

Source: http://us.rd.yahoo.com/dailynews/rss/economy/*http%3A//news.yahoo.com/s/nm/20120103/bs_nm/us_food_prices

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Vodafone Updates Android On HTC Handsets

Sadly it?s not a shift to Ice Cream Sandwich, but Vodafone is pushing out an over-the-air update for the Desire HD and Cha Cha to shift them to Android 2.3.5 and Sense 3.0, as well as smaller bug fix updates for the Sensation and Salsa, from 4pm today. You?ll get a notification on your device when the update is available. Not a concern if you?ve already shifted to a custom ROM, obviously.

Source: http://feeds.lifehacker.com.au/~r/LifehackerAustraliaAU/~3/31qTnSwtPPs/

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Community invited to Martin Luther King Jr. Celebration in Henrietta

The Rush and Henrietta community is invited to attend the fifth annual Martin Luther King Jr. Day community celebration.

The celebration, which is sponsored by the town of Henrietta, the Rush-Henrietta Central School District and the Rush-Henrietta Interracial Clergy Council will be held Thursday January 12 from 7:00-8:15pm at Burger Middle School on Erie Station Road.

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Source: http://henrietta.whec.com/news/events/61126-community-invited-martin-luther-king-jr-celebration-henrietta

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Georgia football: Former Bulldogs quarterback Matthew Stafford uses arm, mind to lead Detroit Lions to NFL playoffs with record-breaking season

ALLEN PARK, Mich. -- Matthew Stafford?s golden right arm is an obvious asset, allowing the Detroit Lions quarterback to thread passes into tight spots across the middle or connect with Calvin Johnson in stride deep down the sideline.

Behind the scenes, Stafford?s teammates believe he?s just as impressive.

Offensive guard Rob Sims marvels at Stafford?s ability to tell the other 10 players on offense exactly what he wants them to do on various plays when they gather the night before each game.

Receiver Nate Burleson still can?t believe Stafford told him to be ready for a pass on a long crossing pattern when Detroit was facing a third-and-19 against San Diego in Week 16.

?He told me in the huddle, `Stay alive, I?m coming to you,?? Burleson recalled. ?He anticipated the coverage they were going to be in before he even got to the line. Sure enough, I was open and he stepped up in the pocket to make the throw.?

Stafford?s record-breaking season lifted the Lions to the playoffs for the first time since the 1999 season.

He threw for 5,038 yards and 41 touchdowns, smashing Scott Mitchell?s single-season team records

But Stafford is more interested in helping the franchise match its number of playoff victories since winning the 1957 NFL title when they play Saturday night at New Orleans.

?That?s the biggest thing,? Stafford said.

Stafford can?t do it all as his 520-yard, 5-TD performance proved Sunday in a 45-41 shootout loss at Green Bay. It looks as if help is on the way for the Lions.

Starting safety Louis Delmas practiced Tuesday, moving a big step closer to playing for the first time since injuring his right knee on Thanksgiving. The Lions were healthy enough to put their top six defensive backs on the field to prepare for the Drew Brees-led passing attack.

Johnson and rookie Titus Young were limited to watching the workout.

Johnson said he was just resting Achilles tendon ailment, declining to say which one was hurting, and Young insisted he was simply giving his entire body a break.

In hindsight, the Lions got a break when they became the NFL?s first -- and still only -- team to go 0-16 because they used the No. 1 pick overall in 2009 to select Stafford and end their decades-long search for a franchise quarterback.

After being limited to just 10 games as a rookie and three last season because of injuries, he bounced back to play in every game during this past regular season to become a candidate for NFL Comeback Player of the Year honors.

His refuse-to-lose moxie helped the Lions become the first team in league history to win four games in a season after losing by at least 13 points, giving them 10 wins for the first time since 1995.

The 23-year-old Stafford, Brees and Hall of Famer Dan Marino are the only ones in league history to throw for 5,000 yards and 40 TDs in a season.

?I really didn?t know that so few people had done it,? Stafford said. ?But it was a total team effort.?

No one, though, had to force Stafford to spend hours each week watching video of opponents and thinking of ways to come up with plays to pick them apart.

Stafford?s father said he?s been doing it for years.

His coach, Randy Allen, at Highland Park High School in Texas used poker chips to represent players on offense and defense, then move them to test his promising pupil.

?Before Randy could take his hand off a chip, Matthew was moving his chips around,? John Stafford said Tuesday in a telephone interview.

During a recruiting trip to Texas, the future Georgia Bulldog sat in a dark room with then-Longhorns offensive coordinator Greg Davis and coach Mack Brown to study the program?s offense.

?Once Davis paused the video and asked Matthew what he?d do,? Stafford?s father recalled. ?Without hesitation, Matthew told him the progression and used their terminology. Davis told him he could start right now because he didn?t have a quarterback at the time who could do what he just did.

?Matthew has always loved the chess match part of the game.?

Even from afar, other coaches see Stafford has more than just a powerful and accurate arm.

Saints coach Sean Payton answered an open-ended question by starting off saying Stafford has progressed quickly to be one of the better quarterbacks in the league thanks in part to his stature and arm strength and ended by talking about the mental aspect of his repertoire.

?Just as importantly, he has that anticipation you look for in the position,? Payton said. ?He does a real good job at the line of scrimmage with his checks and audibles.

?What you see is someone playing with a lot of confidence.?

Source: http://c.moreover.com/click/here.pl?r5698076301

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Wednesday, January 4, 2012

Ask Ziggy: Siri for Windows Phone [App Of The Day]

People love Siri. Well, unless they have an accent or a slight speech impediment. What's important is that Apple really wants everyone with an iPhone 4S use Siri to schedule appointments and look up coffee shops. The Android Market is already filled with enough Siri clones to keep Apple's lawyers busy for years. It's time for Windows Phone to get in on the talk-to-your-phone-in-public fun with Ask Ziggy. More »


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/yBGUgOYpcfI/ask-ziggy-siri-for-windows-phone

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Pentagon: US Navy will remain in Persian Gulf (AP)

WASHINGTON ? The Pentagon on Tuesday answered an Iranian warning to keep U.S. aircraft carriers out of the Persian Gulf by declaring that American warships will continue regularly scheduled deployments to the strategic waterway.

George Little, the Pentagon press secretary, said the Navy operates in the Gulf in accordance with international law and to maintain "a constant state of high vigilance" to ensure the flow of sea commerce.

Earlier Tuesday, Iran's army chief warned an American aircraft carrier not to return to the Gulf. Iran also has warned it could block one of the world's key oil tanker sea lanes in response to economic pressures.

White House press secretary Jay Carney dismissed Iran's warnings as signs of Tehran's weakness and of the international isolation it has faced for pursuing a nuclear program.

"It's the latest round of Iranian threats and is confirmation that Tehran is under increasing pressure for its continued failure to live up to its international obligations," Carney said. "Iran is isolated and is seeking to divert attention from its behavior and domestic problems."

The U.S. Navy has said the aircraft carrier USS John C. Stennis and another vessel exited the Gulf through the Strait of Hormuz a week ago. Iran has been holding naval exercises near the Strait at the mouth of the Gulf, which is a critically important passage for international oil supplies.

"The deployment of U.S. military assets in the Persian Gulf region will continue as it has for decades," Little said in a written statement. "These are regularly scheduled movements in accordance with our longstanding commitments to the security and stability of the region and in support of ongoing operations."

The U.S. Navy 5th Fleet has long been headquartered in the Gulf state of Bahrain.

Asked whether the U.S. intends to send naval reinforcements to the Gulf in response to Iranian talk of closing the Strait of Hormuz, Little did not answer directly but said, "No one in this government seeks confrontation over the Strait of Hormuz. It's important to lower the temperature."

Little reiterated that any closure of the strait would not be tolerated, but he declined to elaborate.

On Monday Iran test-fired a surface-to-surface cruise missile as part of its naval maneuvers in the Gulf, prompting Iran's navy chief to boast that the strait is "completely under our control."

Asked about the significance of the missile test, Little said, "We are aware of reports of missile tests that are apparently tied to Iranian naval exercises that began in late December. They have the right to conduct exercises. The United States believes that the Iranian regime should devote its energy and resources to establishing friendly relations with countries in the Gulf region."

___

Associated Press writer Pauline Jelinek contributed to this report.

Source: http://us.rd.yahoo.com/dailynews/rss/us/*http%3A//news.yahoo.com/s/ap/20120103/ap_on_re_us/us_us_iran

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