Thursday, January 19, 2012

The perfect liquid -- now even more perfect

Wednesday, January 18, 2012

How liquid can a fluid be? This is a question particle physicists at the Vienna University of Technology have been working on. The "most perfect liquid" is nothing like water, but the extremely hot quark-gluon-plasma which is produced in heavy-ion collisions at the Large Hadron Collider at CERN. New theoretical results at Vienna UT show that this quark-gluon plasma could be even less viscous than was deemed possible by previous theories. The results were published in Physical Review Letters and highlighted as an "editors' selection".

Liquids and their Viscosity

Highly viscous liquids (such as honey) are thick and have strong internal friction, quantum liquids, such as super fluid helium can exhibit extremely low viscosity. In 2004, theorists claimed that quantum theory provided a lower bound for viscosity of fluids. Applying methods from string theory, the lowest possible ratio of viscosity to the entropy density was predicted to be ?/4? (with the Planck-constant ?). Even super fluid helium is far above this threshold. In 2005, measurements showed that quark-gluon-plasma exhibits a viscosity just barely above this limit. However, this record for low viscosity can still be broken, claims Dominik Steineder from the Institute for Theoretical Physics at Vienna UT. He obtained this remarkable result working as a PhD-student with Professor Anton Rebhan.

Black Holes and Particle Collisions

The viscosity of a quark-gluon plasma cannot be calculated directly. Its behavior is so complicated that very sophisticated methods have to be applied, says Anton Rebhan: "Using string theory, the quantum field theory of quark-gluon plasma can be related to the physics of black holes in higher dimensions. So we are solving equations from string theory and then transfer the results to the physics of the quark-gluon plasma." The previously established lower bound for viscosity was calculated in a very similar way. However, in these calculations the plasma was modeled to be symmetric and isotropic. "In fact, a plasma produced by a collision in a particle accelerator is not isotropic at the beginning", says Anton Rebhan. The particles are accelerated and collided along one specific direction ? so the resulting plasma shows different properties, depending on the direction from which one looks at it.

Breaking the Limits

The physicists at Vienna UT found a way to include this anisotropy in their equations ? and surprisingly the limit for the viscosity can be broken in this new model. "The viscosity depends on several other physical parameters, but it can be lower than the number previously considered to be the absolute lower bound", Dominik Steineder explains. The on-going quark-gluon-experiments at CERN will provide opportunities for testing the new theoretical predictions.

###

Vienna University of Technology: http://www.tuwien.ac.at/tu_vienna/

Thanks to Vienna University of Technology for this article.

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Source: http://www.labspaces.net/116774/The_perfect_liquid____now_even_more_perfect

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Wednesday, January 18, 2012

Hollywood Golden Age a hot look at Golden Globes (Reuters)

LOS ANGELES (Reuters) ? Timeless elegance, fitted bodices and mermaid trains ruled the Golden Globes' red carpet on Sunday as A-list celebrities channeled old-style Hollywood glamour.

Angelina Jolie looked like Grace Kelly in her white-satin Atelier Versace gown with a twist of Marlene Dietrich thanks to a red fold over collar, matching red lips and red clutch. "Modern Family" actress Sofia Vergara seemed Jayne Mansfield-esque in her strapless teal Vera Wang gown, ruffled train and Harry Winston jewels.

Charlize Theron could have passed for Lana Turner back in her heyday in Dior Couture with a plunging neckline and thigh-high slit dress, while Evan Rachel Wood was a modern-day Joan Crawford in her sparkling green Gucci Premiere gown, also with a plunging neckline.

"It's old Hollywood glamour. We've never seen this many 40s-style fit and flare dresses," said style expert and TV host Sam Saboura. "It's all about the mermaid shape, the hour-glass shape."

Saboura cited Jolie, Theron, Wood, Vergara, Reese Witherspoon, Kate Beckinsale, Rooney Mara, Salma Hayek, Elle McPherson and Debra Messing as just a handful of actresses who opted for some sort of "fit and flare" dress, many with embellished fishtails of ruffles, tules or feathers.

"So many women wore pink! " said designer Rachel Pally, referring to the likes of Theron, McPherson, Mary J. Blige, Octavia Spencer, Natalie Portman, Sarah Paulson and Heidi Klum.

"Pink is a tricky color to pull off because it can often come across as too cute or too young. But it was great to see different shades of pink, like soft blushes and pastels. They were pretty without being too sweet," Pally said.

PASTEL TO PURPLE

Saboura said pastels will be big in fashion this coming spring, as seen in the soft pinks and lavenders, but he noted that many fashion-forward stars were already skipping to fall 2012 on the red carpet, choosing to wear dark, rich colors.

Vergara, Freida Pinto, French actress Berenice Bejo, Tilda Swinton, Helen Mirren and Madeleine Stowe opted for dark blues or peacock tones. Burgundys and rich purples were favored by Michelle Williams, Viola Davis, Juliana Margulies, Emma Stone and Tina Fey, while greens were seen on Melissa McCarthy, Laura Dern and Kelly Macdonald.

"Headbands were also a trend, whether you like them or not," observed Saboura of the accessory worn by Theron and Williams. "With films like 'The Artist' and the forthcoming 'The Great Gatsby,' this is just the beginning of this type of '20s style that we're going to see."

But the consensus among experts seemed to be that Jolie's red fold over collar and matching red lips and clutch purse was among the most stunning looks of the night.

"She looked amazing," said celebrity designer Bruno Schiavi. "The top of the dress was very structured -- I bet it had some corsetry inside -- with a small train at the bottom that was not too over done. She wanted people to look at that red accent with the color red being daring, dangerous and sexy. She was very much 'Mr. & Mrs. Smith,' but not too overdone because she's still a mum."

(Reporting by Zorianna Kit; Editing by Bob Tourtellotte and Sandra Maler)

Source: http://us.rd.yahoo.com/dailynews/rss/fashion/*http%3A//news.yahoo.com/s/nm/20120116/en_nm/us_goldenglobes_fashion

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UK scientists find 'lost' Darwin fossils

This image made available by the Royal Holloway, University of London on Tuesday Jan. 17, 2012 shows a polished section of fossil wood from the cabinet of Reverend John Henslow, Charles Darwin's mentor at Cambridge, comprising a 150 million years old tree. It comes from Dorset, England and you can even make out the annual tree-rings. British scientists have found scores of fossils the great evolutionary theorist Charles Darwin and his peers collected but that had been lost for more than 150 years. Dr. Howard Falcon-Lang, a paleontologist at Royal Holloway, University of London, said Tuesday that he stumbled upon the glass slides containing the fossils in an old wooden cabinet that had been shoved in a "gloomy corner" of the massive, drafty British Geological Survey. (AP Photo/Royal Holloway, University of London, Kevin D'Souza Ho) EDITORIAL USE ONLY

This image made available by the Royal Holloway, University of London on Tuesday Jan. 17, 2012 shows a polished section of fossil wood from the cabinet of Reverend John Henslow, Charles Darwin's mentor at Cambridge, comprising a 150 million years old tree. It comes from Dorset, England and you can even make out the annual tree-rings. British scientists have found scores of fossils the great evolutionary theorist Charles Darwin and his peers collected but that had been lost for more than 150 years. Dr. Howard Falcon-Lang, a paleontologist at Royal Holloway, University of London, said Tuesday that he stumbled upon the glass slides containing the fossils in an old wooden cabinet that had been shoved in a "gloomy corner" of the massive, drafty British Geological Survey. (AP Photo/Royal Holloway, University of London, Kevin D'Souza Ho) EDITORIAL USE ONLY

This image made available by the Royal Holloway, University of London on Tuesday Jan. 17, 2012 shows a polished section of a 40-million-year-old fossil wood collected by Charles Darwin in 1834 on Chiloe Island, South America in the course of his famous "Voyage of the Beagle." British scientists have found scores of fossils the great evolutionary theorist Charles Darwin and his peers collected but that had been lost for more than 150 years. Dr. Howard Falcon-Lang, a paleontologist at Royal Holloway, University of London, said Tuesday that he stumbled upon the glass slides containing the fossils in an old wooden cabinet that had been shoved in a "gloomy corner" of the massive, drafty British Geological Survey. (AP Photo/Royal Holloway, University of London, Kevin D'Souza Ho) EDITORIAL USE ONLY

(AP) ? British scientists have found scores of fossils the great evolutionary theorist Charles Darwin and his peers collected but that had been lost for more than 150 years.

Dr. Howard Falcon-Lang, a paleontologist at Royal Holloway, University of London, said Tuesday that he stumbled upon the glass slides containing the fossils in an old wooden cabinet that had been shoved in a "gloomy corner" of the massive, drafty British Geological Survey.

Using a flashlight to peer into the drawers and hold up a slide, Falcon-Lang saw one of the first specimens he had picked up was labeled 'C. Darwin Esq."

"It took me a while just to convince myself that it was Darwin's signature on the slide," the paleontologist said, adding he soon realized it was a "quite important and overlooked" specimen.

He described the feeling of seeing that famous signature as "a heart in your mouth situation," saying he wondering "Goodness, what have I discovered!"

Falcon-Lang's find was a collection of 314 slides of specimens collected by Darwin and other members of his inner circle, including John Hooker ? a botanist and dear friend of Darwin ? and the Rev. John Henslow, Darwin's mentor at Cambridge, whose daughter later married Hooker.

The first slide pulled out of the dusty corner at the British Geological Survey turned out to be one of the specimens collected by Darwin during his famous expedition on the HMS Beagle, which changed the young Cambridge graduate's career and laid the foundation for his subsequent work on evolution.

Falcon-Lang said the unearthed fossils ? lost for 165 years ? show there is more to learn from a period of history scientists thought they knew well.

"To find a treasure trove of lost Darwin specimens from the Beagle voyage is just extraordinary," Falcon-Lang added. "We can see there's more to learn. There are a lot of very, very significant fossils in there that we didn't know existed."

He said one of the most "bizarre" slides came from Hooker's collection ? a specimen of prototaxites, a 400 million-year-old tree-sized fungi.

Hooker had assembled the collection of slides while briefly working for the British Geological Survey in 1846, according to Royal Holloway, University of London.

The slides ? "stunning works of art," according to Falcon-Lang ? contain bits of fossil wood and plants ground into thin sheets and affixed to glass in order to be studied under microscopes. Some of the slides are half a foot long (15 centimeters), "great big chunks of glass," Falcon-Lang said.

"How these things got overlooked for so long is a bit of a mystery itself," he mused, speculating that perhaps it was because Darwin was not widely known in 1846 so the collection might not have been given "the proper curatorial care."

Royal Holloway, University of London said the fossils were 'lost' because Hooker failed to number them in the formal "specimen register" before setting out on an expedition to the Himalayas. In 1851, the "unregistered" fossils were moved to the Museum of Practical Geology in Piccadilly before being transferred to the South Kensington's Geological Museum in 1935 and then to the British Geological Survey's headquarters near Nottingham 50 years later, the university said.

The discovery was made in April, but it has taken "a long time" to figure out the provenance of the slides and photograph all of them, Falcon-Lang said. The slides have now been photographed and will be made available to the public through a new online museum exhibit opening Tuesday.

Falcon-Lang expects great scientific papers to emerge from the discovery.

"There are some real gems in this collection that are going to contribute to ongoing science."

Dr. John Ludden, executive director of the Geological Survey, called the find a "remarkable" discovery.

"It really makes one wonder what else might be hiding in our collections," he said.

____

Cassandra Vinograd can be reached at http://twitter.com/CassVinograd

____

Online:

http://www.bgs.ac.uk/discoveringGeology/geologyOfBritain/archives/jdhooker/home.html

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/b2f0ca3a594644ee9e50a8ec4ce2d6de/Article_2012-01-17-EU-Britain-Darwin-Fossils/id-3ef0fa3ca0e64e36b459f4e42542fa01

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Tuesday, January 17, 2012

White House casts doubt over anti-piracy legislation (Reuters)

WASHINGTON (Reuters) ? White House officials raised concerns on Saturday about online piracy legislation pending in Congress that Google and Facebook have decried as heavy-handed and Hollywood studios and music labels say is needed to save U.S. jobs.

In a blog posting, three advisers to President Barack Obama said they believed the proposed Stop Online Piracy Act (SOPA) and other bills could make businesses on the Internet vulnerable to litigation and harm legal activity and free speech.

"Any effort to combat online piracy must guard against the risk of online censorship of lawful activity and must not inhibit innovation by our dynamic businesses large and small," said the officials, including White House cyber-security czar Howard Schmidt.

The House of Representatives' SOPA bill aims to crack down on online sales of pirated American movies, music or other goods by forcing Internet companies to block access to foreign sites offering material that violates U.S. copyright laws.

U.S. advertising networks could also be required to stop online ads and search engines would be barred from directly linking to websites found to be distributing pirated goods.

The search engine Google has repeatedly said the bill goes too far and could hurt investment. Along with other Internet firms such as Yahoo!, Facebook, Twitter and eBay, it has run advertisements in major newspapers urging Washington lawmakers to rethink their approach.

STEALING JOBS

Proponents of stricter piracy rules reacted strongly to Saturday's White House statement, which darkened prospects for legislation already expected to struggle to clear Congress in an election year.

"It is not censorship to enforce the law against foreign thieves," said Lamar Smith, a Texas Republican who chairs the House judiciary committee. He estimated intellectual property industries provide 19 million high-paying U.S. jobs and account for more than 60 percent of American exports.

"Congress cannot stand by and do nothing while some of America's most profitable and productive industries are under attack," he said in a statement responding to the White House.

Smith, in an interview with Reuters on Thursday, had vowed to press ahead with the bill in spite of criticism from Google and others and said he thought it would pass the House, where Republicans have a majority.

The U.S. Chamber of Commerce said it strongly supported the House legislation as well as the "Protect IP Act" in the Democrat-controlled Senate, calling both "narrowly targeted bills designed to target the worst of the worst offenders."

"Given the broad consensus that this issue needs to be addressed, it is time to come together and adopt strong legislation that ends the ability of foreign criminals to prey on innocent consumers and steal American jobs," it said.

The Motion Picture Association of America said while the White House statement raised significant points, "protecting American jobs is important too, particularly in these difficult economic times for our nation."

And the Recording Industry Association of America, noting the United States is the world's top exporter of creative works, said it was intolerable for Internet companies to be allowed "to direct law-abiding consumers to unlawful and dangerous sites."

"Hyperbole, hysteria and hypotheticals cannot change the fact that stealing is wrong, costing jobs and must be contained," it said.

PUBLIC OPPOSITION

Schmidt and the other advisers said the Obama administration was ready to work with lawmakers on a narrower, more targeted approach to online piracy to ensure that legitimate businesses - including start-up firms - would not be harmed.

They also said online firms and Internet providers should adopt voluntary standards to clamp down on piracy, an approach Republicans in Congress and many companies have said lacks the teeth to have an impact.

Saturday's statement did not make clear whether Obama would veto the piracy legislation if it reaches his desk, something the White House would likely spell out more formally ahead of any votes in Congress.

Sherwin Siy, deputy legal director of the consumer rights group Public Knowledge, called on lawmakers to set aside the existing bills and get to work on a new "consensus bill" responding to the White House concerns.

"The messages being sent by the public in opposition to this bill are finally getting through to Washington," Siy said.

(Additional reporting by Diane Bartz, Jim Finkle and Tom Ferraro; Editing by John O'Callaghan and Todd Eastham)

Source: http://us.rd.yahoo.com/dailynews/rss/internet/*http%3A//news.yahoo.com/s/nm/20120114/tc_nm/us_usa_internet_whitehouse

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Monday, January 16, 2012

Globes: Comedy vies with drama this awards season

In this Thursday, Jan. 12, 2012 photo, a man walks near the Golden Globe in the ballroom at the Beverly Hilton Hotel in Beverly Hills, Calif., as workers prepare for the 69th Annual Golden Globe Awards on Sunday. (AP Photo/Jae C. Hong)

In this Thursday, Jan. 12, 2012 photo, a man walks near the Golden Globe in the ballroom at the Beverly Hilton Hotel in Beverly Hills, Calif., as workers prepare for the 69th Annual Golden Globe Awards on Sunday. (AP Photo/Jae C. Hong)

(AP) ? The Golden Globes have equally good comedy and drama masks this year.

Alongside heavyweight dramas, the category for best musical or comedy at the Globes usually is more of a lark, with nominees rarely emerging with best-picture prospects for Hollywood's top prize, the Academy Awards.

Yet Sunday's musical or comedy contenders make up a strong bunch that could give their best-drama cousins at the Globes a run for their money come Oscar time.

Leading the Globes, to be carried live on NBC from 8-11 p.m. EST from the Beverly Hilton Hotel, is the silent film "The Artist," with six nominations. Among them are best musical or comedy, directing and writing honors for Michel Havanavicius, and acting slots for Jean Dujardin and Berenice Bejo.

Tied for second with five nominations each are the Deep South tale "The Help" and George Clooney's Hawaiian family story "The Descendants," both of them among best-drama contenders.

With the Oscars choosing up to 10 best-picture contenders when nominations come out Jan. 24, "The Artist" could have some other lighter fare as company there. Globe musical or comedy nominees "Midnight in Paris" and "Bridesmaids" have solid Oscar nomination prospects, along with the weighty dramas academy voters historically prefer.

Most years, the musical or comedy category is filled with nominees that have little or no chance at the Oscars, such as last year's Globe nominees "The Tourist" and "Burlesque." The last time a musical or comedy Globe winner earned the best-picture Oscar was nine years ago, when "Chicago" triumphed at both shows.

This time, the dual categories at the Globes could create an Oscar showdown between the dramatic and musical-comedy winners.

Along with "The Artist," Kristen Wiig's wedding romp "Bridesmaids" and Woody Allen's romantic fantasy "Midnight in Paris," Globe nominees for best musical or comedy are Joseph Gordon-Levitt's cancer tale "50/50" and Michelle Williams' Marilyn Monroe story "My Week with Marilyn."

Besides "The Descendants" and "The Help," best-drama contenders are Martin Scorsese's Paris adventure "Hugo," Clooney's political thriller "The Ides of March," Brad Pitt's sports tale "Moneyball" and Steven Spielberg's World War I epic "War Horse."

Presented by the Hollywood Foreign Press Association, a group of 89 entertainment reporters for overseas outlets, the Globes used to have a strong record predicting the films that would go on to win best-picture at the Oscars. But lately, a best-picture win at the Globes has not translated into victory on Oscar night.

Over the last seven years, only one Globe best-picture winner ? 2008's "Slumdog Millionaire" ? has gone on to claim the top Oscar trophy. Before that stretch, the Globes had been on an eight-year streak in which one of its two best-picture recipients also won the main prize at the Academy Awards.

Last year, "The Social Network" won best-drama at the Globes and looked like the early Oscar favorite. But momentum later swung to eventual Oscar best-picture winner "The King's Speech." The year before, "Avatar" was named best drama at the Globes, while "The Hurt Locker" took best picture at the Oscars.

The Globes have a better track record predicting who will win Oscars for acting. A year ago, all four actors who won Oscars earned Globes first ? lead players Colin Firth for "The King's Speech" and Natalie Portman for "Black Swan" and "The Fighter" supporting stars Christian Bale and Melissa Leo.

This time, "The Help" leads the acting categories with three nominations, for Viola Davis, Octavia Spencer and Jessica Chastain. Along with Clooney, Pitt and Williams, other nominees include Meryl Streep for the Margaret Thatcher story "The Iron Lady," Leonardo DiCaprio for the J. Edgar Hoover biography "J. Edgar," Christopher Plummer for the father-son tale "Beginners" and Glenn Close and Janet McTeer for the Irish drama "Albert Nobbs."

Ryan Gosling has two nominations, as dramatic actor for "The Ides of March" and actor in a musical or comedy for the romance "Crazy, Stupid, Love."

Morgan Freeman will receive the Globes' Cecil B. DeMille award for lifetime achievement.

Ricky Gervais, who ruffled feathers with sharp wisecracks aimed at celebrities as well as the Hollywood Foreign Press Association, returns as host of the Globes for the third-straight time.

If the caustic comedian decides to again bite the hand that feeds him, a case working its way through federal court might provide some material: the HFPA is fighting for the right to dump longtime Globes broadcaster NBC if it can get a better deal with another network.

___

Online:

http://www.goldenglobes.org

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/4e67281c3f754d0696fbfdee0f3f1469/Article_2012-01-15-Golden%20Globes/id-c588e823e15c44fa8d307f23d2b78f58

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Cycle of S. Sudan's tribal violence kills hundreds (AP)

PIBOR, South Sudan ? A century of enmity between two cattle-herding tribes in an isolated corner of the world's newest country has burst into the open in killings and revenge attacks. For more than a week Aliye Amor has slept on bare earth, being among tens of thousands made homeless after armed raiders invaded.

Attacks in South Sudan by armed raiders killed scores, possibly thousands, of people in just a few weeks. This region is among the world's poorest, studded by grass or mud huts and where few roads exist.

When 6,000 or more armed warriors from the Lou Nuer tribe descended on Pibor Country on Dec. 23 to attack Murle residents, neither U.N. forces or South Sudan troops could stop them. Thousands fled into the bush, where dozens, hundreds or possibly even thousands were killed. No one is yet sure. A government official from the Murle tribe said more than 3,000 died, but neither the U.N. nor the central government has verified the toll.

Amor's face is dark and weathered, with deep creases chronicling her many years in one of South Sudan's harshest environments. On Thursday Amor waited patiently for a ration of sorghum, beans, oil and salt from the World Food Program.

When the Lou Nuer arrived in her village of Liloth, Amor fled. She says she witnessed armed tribesmen kill young men and abduct women and children. She ran to Pibor with nothing but a walking stick and the tattered clothes on her back.

"They killed the women, they killed the children," said Amor, who like many in this region does not know her age. "I am an old women, I don't know everything. The children were killed, the young men were killed. I ran into the bush."

The Lou Nuer's large-scale attack lasted about a week and then subsided. Now, reprisal attacks by the Murle have begun.

Simon Hoth, a county commissioner in Jonglei state and a member of the Lou Nuer, said Friday that hundreds of armed Murle charged into three villages on Wednesday, burned them to the ground and killed 57 people, including 25 women and 23 children. Another 40 are missing and were likely abducted, he said.

"They have butchered these people," Hoth said. There was no immediate independent confirmation of Hoth's figures.

The attack on the three villages in Uror Country of Jonglei state on Wednesday was just one of the latest of tit-for-tat onslaughts that began almost a half year ago ? the latest chapter in a long history of tribal warfare. In August, Murle raiders killed an estimated 600 Lou Nuer. Tens of thousands of cattle have traded hands in the battles.

Cattle raiding between the Lou Nuer and Murle are decades old. The 23-year civil war between the newly independent South Sudan and its northern neighbor, Sudan, flooded this region with weapons.

"Cattle rustling has been there since 1898," government spokesman Barnaba Benjamin Marial said this week. "But in those days they were using spears and sticks. Now they have acquired a lot of weapons during the civil war and this has made the cattle rustling to be much more damaging than anything else."

The tens of thousands of people ? 60,000 by some estimates ? who fled into the bush are trickling back, but in many cases have nothing to return to. Because Jonglei is perhaps South Sudan's most remote state, most aid must come through the air. The World Food Program began bringing food into Pibor last week, but country director Chris Nikoi says resources are stretched thin.

"The 60,000 are scattered all over and yes, we are having difficulties to get to everybody," says Nikoi.

Pibor, the capital of Pibor County, was spared much of the violence that swept the county. South Sudan and U.N. troops were deployed to defend its government buildings, but the forces could not ? and did not try to ? protect the population.

The column of Lou Nuer youth made it to the edge of Pibor. The raiders stormed the Doctors Without Borders hospital near the county headquarters and ransacked the medical supplies building. Boxes of emergency food rations and medication were still strewn along the road.

Karel Janssens, the facility's coordinator, noted that 160,000 people live in Pibor County. The Doctors Without Borders building is the only medical facility. The group has resumed operations, but many of its 156 staff members fled during the attack.

"We have been in contact, seen only 80 of them. We have heard some good news about others but we are still missing a lot," Janssens said.

Among the victims inside the clinic is 9-year-old Ngathin. Her father, Mangiro, said they fled the fighting but met a group of attackers along the road. Ngathin was shot while in her mother's arms. Mangiro says his wife and two other children were killed.

At the heart of the tribal attacks is cattle, the lifeblood for survival here. Cattle are a measure of wealth as well as a way to acquire wives and prestige. While the raids always involve the capture of tens of thousands of cattle, the escalating violence seen in each successive raid has added an element of revenge to groups' rivalry.

The International Organization for Migration said in a statement Friday that "over 50,000 cattle are said to have been herded away by the Lou Nuer" in the latest attack. In South Sudan it's sometimes difficult to say that one group stole cattle from another, because the cattle in question may have been stolen in a previous raid.

Dina Parmer, a policy adviser for peacebuilding organization PACT, says the communities have little access to formal justice mechanisms that can help resolve grievances and stop the cycle of violence.

"Violence has become the norm. It has become the only way in which to get noticed and the only way in which to get what people need," she said.

The first reprisal attack came last Sunday, when Murle fighters attacked Lou Nuer villages north of Pibor, killing 22 people. That was followed by the Wednesday attack in Uror that killed 57. Hoth said Uror's residents have little hope of being kept safe.

"Arms are still in the hands of the civilian population and these attacks will continue, definitely," said Jonglei Gov. Kuol Manyang Juuk.

The crisis in Jonglei is just one of a host of problems in one of the world's most underdeveloped nations, which gained independence last July. Besides the 60,000 displaced in Jonglei, the country is also hosting more than 80,000 refugees who have fled rebellions in neighboring Sudan. Thousands of South Sudanese have returned from Sudan since independence and thousands more have been displaced by the brutal Lord's Resistance Army, a rebel group plaguing Central Africa.

"All these represent an enormous challenges for the people of South Sudan," said United Nations High Commissioner for Refugees Antonio Guterres when he visited the country earlier this week. "They need massive solidarity from the international community to cope with this humanitarian, very difficult situation."

Source: http://us.rd.yahoo.com/dailynews/rss/africa/*http%3A//news.yahoo.com/s/ap/20120113/ap_on_re_af/af_south_sudan_violence

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