False memories prime immune system for future attacks









































IN A police line-up, a falsely remembered face is a big problem. But for the body's police force – the immune system – false memories could be a crucial weapon.












When a new bacterium or virus invades the body, the immune system mounts an attack by sending in white blood cells called T-cells that are tailored to the molecular structure of that invader. Defeating the infection can take several weeks. However, once victorious, some T-cells stick around, turning into memory cells that remember the invader, reducing the time taken to kill it the next time it turns up.












Conventional thinking has it that memory cells for a particular microbe only form in response to an infection. "The dogma is that you need to be exposed," says Mark Davis of Stanford University in California, but now he and his colleagues have shown that this is not always the case.












The team took 26 samples from the Stanford Blood Center. All 26 people had been screened for diseases and had never been infected with HIV, herpes simplex virus or cytomegalovirus. Despite this, Davis's team found that all the samples contained T-cells tailored to these viruses, and an average of 50 per cent of these cells were memory cells.












The idea that T-cells don't need to be exposed to the pathogen "is paradigm shifting," says Philip Ashton-Rickardt of Imperial College London, who was not involved in the study. "Not only do they have capacity to remember, they seem to have seen a virus when they haven't."












So how are these false memories created? To a T-cell, each virus is "just a collection of peptides", says Davis. And so different microbes could have structures that are similar enough to confuse the T-cells.












To test this idea, the researchers vaccinated two people with an H1N1 strain of influenza and found that this also stimulated the T-cells to react to two bacteria with a similar peptide structure. Exposing the samples from the blood bank to peptide sequences from certain gut and soil bacteria and a species of ocean algae resulted in an immune response to HIV (Immunology, doi.org/kgg).












The finding could explain why vaccinating children against measles seems to improve mortality rates from other diseases. It also raises the possibility of creating a database of cross-reactive microbes to find new vaccination strategies. "We need to start exploring case by case," says Davis.












"You could find innocuous pathogens that are good at vaccinating against nasty ones," says Ashton-Rickardt. The idea of cross-reactivity is as old as immunology, he says. But he is excited about the potential for finding unexpected correlations. "Who could have predicted that HIV was related to an ocean algae?" he says. "No one's going to make that up!"












This article appeared in print under the headline "False memories prime our defences"




















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































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Read More..

Mystery gold gifts for tsunami-wracked Japan port






TOKYO: A Japanese city devastated by the 2011 tsunami has received anonymous gifts of gold worth more than $250,000 in a phenomenon dubbed a "goodwill gold rush" ahead of the second anniversary of the disaster.

The president of the company which operates the port in the northeastern city of Ishinomaki last week received a parcel containing two slabs of gold each weighing one kilogram (2.2 pounds).

"Since it was labelled as 'miscellaneous goods,' I casually opened the box," thinking it must be books or the like as it was heavy, said Kunio Sunow, president of the Ishinomaki Fish Market Co. Ltd.

"I was stunned because what's in there was 24k gold in two plates. One was wrapped in brown paper and the other in a page taken from a magazine -- both were sitting in bubble sheets," he told AFP by telephone on Saturday.

The parcel had been sent anonymously from Nagano city northwest of Tokyo with no message.

"Just looking at 24k gold can encourage people as it has a presence. It's great to know we haven't been forgotten," Sunow said, adding he had not yet decided how to use the gift.

Japanese media said a non-profit group in Ishinomaki that has been supporting its revival had also received two kilograms of gold bullion and at least one more group got more than one kilogram.

The gifts have mystified Japanese people, prompting the mass-circulation Asahi newspaper to call the phenomenon a "goodwill gold rush" in Ishinomaki.

The city, some 350 kilometres (220 miles) northeast of Tokyo, was devastated by the 9.0 earthquake and massive tsunami it generated on March 11, 2011.

The disaster killed nearly 19,000 people, including more than 3,000 in Ishinomaki, and sparked the world's worst nuclear accident in a generation.

- AFP/xq



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Sen. Rubio drowning in 'water-gate'





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Man arrested in Alaska Coast Guard base deaths

ANCHORAGE, Alaska An Alaska man was arrested Friday in last year's shooting deaths at a Coast Guard air station on Kodiak Island that left two employees dead, the U.S. attorney said.

James Michael Wells of Kodiak is accused in a federal murder complaint of killing Petty Officer 1st Class James Hopkins and retired Chief Boatswain's Mate Richard Belisle on April 12.

Another Coast Guard member found the victims shortly after the two would have arrived for work at the station, which monitors radio traffic from ships and planes and is home to cutters, helicopters and rescue swimmers that aid mariners in the Bering Sea and Pacific Ocean. Their bodies were found in the rigger building, where antennas are repaired.

FBI agents immediately flew to Kodiak Island from Anchorage, about 250 miles away, to investigate the case as a double homicide. Few details were released in the weeks after the deaths.

Wells' arrest came after "an extensive investigation" led by the FBI and the Coast Guard Investigative Service, with help from the Alaska State Troopers, U.S. Attorney Karen Loeffler said in a statement.

Wells is expected to appear in court next week in Anchorage, Loeffler said.

No one was immediately reachable by phone Friday evening at the U.S. attorney's office to provide additional details.

Hopkins, 41, was an electronics technician from Vergennes, Vt. Belisle, 51, was a former chief petty officer who continued service to the Coast Guard as a civilian employee.

Read More..

Carnival Cruise Ship Hit With First Lawsuit












The first lawsuit against Carnival Cruise Lines has been filed and it is expected to be the beginning of a wave of lawsuits against the ship's owners.


Cassie Terry, 25, of Brazoria County, Texas, filed a lawsuit today in Miami federal court, calling the disabled Triumph cruise ship "a floating hell."


"Plaintiff was forced to endure unbearable and horrendous odors on the filthy and disabled vessel, and wade through human feces in order to reach food lines where the wait was counted in hours, only to receive rations of spoiled food," according to the lawsuit, obtained by ABCNews.com. "Plaintiff was forced to subsist for days in a floating toilet, a floating Petri dish, a floating hell."


Click Here for Photos of the Stranded Ship at Sea


The filing also said that during the "horrifying and excruciating tow back to the United States," the ship tilted several times "causing human waste to spill out of non-functioning toilets, flood across the vessel's floors and halls, and drip down the vessel's walls."


Terry's attorney Brent Allison told ABCNews.com that Terry knew she wanted to sue before she even got off the boat. When she was able to reach her husband, she told her husband and he contacted the attorneys.


Allison said Terry is thankful to be home with her husband, but is not feeling well and is going to a doctor.








Carnival's Triumph Passengers: 'We Were Homeless' Watch Video









Girl Disembarks Cruise Ship, Kisses the Ground Watch Video









Carnival Cruise Ship Passengers Line Up for Food Watch Video





"She's nauseated and actually has a fever," Allison said.


Terry is suing for breach of maritime contract, negligence, negligent misrepresentation and fraud as a result of the "unseaworthy, unsafe, unsanitary, and generally despicable conditions" on the crippled cruise ship.


"Plaintiff feared for her life and safety, under constant threat of contracting serious illness by the raw sewage filling the vessel, and suffering actual or some bodily injury," the lawsuit says.


Despite having their feet back on solid ground and making their way home, many passengers from the cruise ship are still fuming over their five days of squalor on the stricken ship and the cruise ship company is likely to be hit with a wave of lawsuits.


"I think people are going to file suits and rightly so," maritime trial attorney John Hickey told ABCNews.com. "I think, frankly, that the conduct of Carnival has been outrageous from the get-go."


Hickey, a Miami-based attorney, said his firm has already received "quite a few" inquiries from passengers who just got off the ship early this morning.


"What you have here is a) negligence on the part of Carnival and b) you have them, the passengers, being exposed to the risk of actual physical injury," Hickey said.


The attorney said that whether passengers can recover monetary compensation will depend on maritime law and the 15-pages of legal "gobbledygook," as Hickey described it, that passengers signed before boarding, but "nobody really agrees to."


One of the ticket conditions is that class action lawsuits are not allowed, but Hickey said there is a possibility that could be voided when all the conditions of the situation are taken into account.


One of the passengers already thinking about legal action is Tammy Hilley, a mother of two, who was on a girl's getaway with her two friends when a fire in the ship's engine room disabled the vessel's propulsion system and knocked out most of its power.


"I think that's a direction that our families will talk about, consider and see what's right for us," Hilley told "Good Morning America" when asked if she would be seeking legal action.






Read More..

Comet rain took life's ingredients to Jupiter's moons


































Dust made from pulverised comets may have seeded Jupiter's moons with the raw ingredients for life. That includes Europa, which is thought to harbour a liquid ocean beneath its icy crust.












Jupiter has two kinds of natural satellites: large spherical moons and smaller lumpy bodies that follow elongated orbits. Chemical analysis of the irregular bodies suggests they are made of the same stuff as asteroids and comets. This means they are probably rich in the carbon-containing compounds that are key to life on Earth.












It is thought that a gravitational reshuffling of the planets some 4 billion years ago shook up distant belts of space rocks and sent many of them hurtling towards the sun. Some got caught in Jupiter's orbit and became the irregular satellites. The objects frequently collided as they settled into their new orbits, creating dust as fine as coffee grounds.












Blanketed moons













Models say that Jupiter should have captured about 70 million gigatonnes of rocky material, but less than half that amount remains as irregular moons. "So what happened to all the stuff?" asks William Bottke of the Southwest Research Institute in Boulder, Colorado.












His team ran simulations of the irregular moons' evolution and found that their ground-up material would have fallen towards Jupiter, dragged by gravity and blown by the solar wind. About 40 per cent of it would have hit Jupiter's four largest moons. Most of this landed on Callisto (Icarus, doi.org/kff). The rest hit Ganymede and then Europa.












That's roughly consistent with images from the Galileo spacecraft, which show dark material on Ganymede and Callisto. "Callisto literally looks like it's buried in dark debris," says Bottke, while Ganymede has a lot of similarities but less dark stuff on its surface.











Sinking carbon












But the surface of Europa is relatively clean. Cracks cover the moon's crust, which suggests it has cycled material from deeper inside, so the carbon-rich debris may have been incorporated into the ice and even made it into the ocean, says Bottke. "Would it be important in Europa's ocean? It's hard to say," he says. "But it is kind of interesting to think about."













Bottke's calculations only set a lower limit on the amount of carbon-rich material that could have ended up in Europa's ocean, says Cynthia Phillips of the SETI Institute in Mountain View, California, who studies Europa.












"This could potentially be an even larger source of astrobiologically interesting material for the ocean layer than the authors of this paper estimate," she says.


















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































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No health effects from Fukushima: Japan researcher






TOKYO: A Japanese government-backed researcher said Friday no health effects from radiation released by the stricken Fukushima nuclear plant have been seen in people living nearby.

The pronouncement by Kazuo Sakai of Japan's National Institute of Radiological Sciences is the latest by authorities seeking to quell fears over the long-term effects of the disaster.

But it was dismissed by campaign group Greenpeace who said the government should not seek to play down health worries.

"Since the accident in Fukushima, no health effects from radiation have been observed, although we have heard reports some people fell ill due to stress from living as evacuees and due to worries and fears about radiation," Sakai said.

"We know from epidemiological surveys among atomic-bomb victims in Hiroshima and Nagasaki that if exposure to radiation surpasses 100 millisieverts, the risk of cancer will gradually rise.

"To put it the other way round, we can't say risk of cancer will rise if you are exposed to radiation lower than 100 millisieverts," he said, adding that most people measured had radiation exposure of 20 millisieverts or less.

Sakai said radiation is not at "the level we have to worry about its health effect," for people in Fukushima, taking into account exposure from the atmosphere and ingestion from food.

His comments came as the Fukushima prefectural government panel said this week three people who were 18 or younger when the nuclear crisis erupted in March 2011 have been diagnosed with thyroid cancer.

Radioactive iodine released in nuclear accidents tends to accumulate in thyroid glands, particularly in young people. In the 1986 Chernobyl disaster, a noticeable increase in thyroid cancer cases was detected among children in the affected area.

Referring to the thyroid cancers reported in Fukushima, Sakai said "there is no clear link between the cancers and exposure to radiation, as empirical knowledge says it takes several years before thyroid cancer is detected after exposure to radiation."

"It is important, however, to monitor these cases," he added, noting that comparison with the pre-accident situation and other regions was necessary.

Kazue Suzuki, nuclear campaigner at Greenpeace, who is not a scientist, said Japan should not try to play down the potential dangers.

"Japan should pour more energy into prevention of diseases including thyroid cancer than talking down the risk of low-level radiation."

"Even if there is no comparative epidemiological data, the government should err on the side of caution and carry out more frequent health checks among residents not only in Fukushima but in other prefectures," she said.

A massive undersea earthquake in March 2011 sent a huge tsunami crashing into Japan's northeast, crushing whole communities and sending nuclear reactors on the coast into meltdown.

Around 19,000 people were killed by the natural disaster, but no one is officially recorded as having died as a direct result of the radiation that spewed from the crippled units in the following months.

-AFP/fl



Read More..

Mom of boy held in bunker is worried






STORY HIGHLIGHTS


  • Phil McGraw speaks with mother of former Alabama child hostage

  • She tells him she worried about trying to put him back on a school bus

  • Ethan told her the Army killed the 'bad man'

  • The 6-year-old tells his mom that 'My bus driver is dead'




(CNN) -- Jennifer Kirkland says she caught her 6-year-old son Ethan just staring at a school bus the other day.


He was mesmerized, his eyes locked on the yellow vehicle. He didn't say a thing, and she didn't know what to say to him.


The last time he was on a bus, he was sitting just behind the driver -- as he always did -- waiting for his stop so he could go home.


But the "bad man" got on, and killed the driver, his buddy Mr. Poland.


Appearing on the "Dr. Phil" show, Kirkland told Phil McGraw she was worried how her little boy was going to react the next time she tried to put him on the bus to school.


After being kidnapped, the recovery ahead









Photos: Alabama bunker standoff










HIDE CAPTION















Ethan has been having a hard time sleeping, she told the psychologist turned syndicated daytime talk show host.


He thrashes his arms, tosses and turns and sometimes he calls out.


It has only been almost 10 days since the FBI sent a rescue team into the bunker in Midland City, Alabama, where Ethan was held hostage for nearly a week by Jimmy Lee Dykes.


His mother hasn't asked Ethan what happened when he was there.


"I have not talked to Ethan about it," she said in an interview aired Wednesday. "I don't know how to. As a mother I want him to know that I'm there if he needs to talk. I don't know how to respond because I have never been through this."


Inside the bunker: From storm shelter to boy's prison


Ethan has seen two people shot to death. Dykes shot bus driver Charles Poland several times before he carried Ethan, who had fainted, off the bus and into an underground bunker Dykes had built on his property.


Then the FBI killed Dykes when negotiations broke down and authorities felt they had to rescue the boy before Dykes, who had a handgun, did something rash.


"The Army came in and shot the bad man," Kirkland said Ethan told her.


Kirkland said she had hoped Dykes wouldn't be harmed.


"From the very beginning, I had already forgiven Mr. Dykes even though he had my child," she said. "I could not be angry through this. My job was to be the mother."


She thinks Dykes had a soft spot for Ethan because he has disabilities. Dykes took care of her boy as best he could, she said.


He even fried chicken for the boy.


Still, as the crisis continued, she worried that Dykes might be spooked by something her child did -- or that he had enough supplies to stay down there for months. She worried her boy would think she had abandoned him.


She asked authorities to let her speak to Dykes.


"That's my baby. He's my world. He's my everything," she said. "Everything I do I do for him. And I was afraid I wasn't going to get him back."


When she did get him back, he was in the hospital, putting stickers on everyone in sight.


"Hey, bug, I sure have missed you," she recounted.


"I missed you, too," he answered.


FBI: Bombs found in Alabama kidnapper's bunker


Now she worries that even though he seems like the same playful little boy, there is an emotional storm ahead.


McGraw told her to talk to Ethan about his feelings, not what happened to him in the bunker.


"Let that decay in his young mind," he said.


McGraw asked Ethan a few questions, but as 6-year-olds are apt to do, he answered most with a "Yes" or a "No."


But when the doctor asked him how he got to school, Ethan said, "On my bus, but my ..."


Then he walked over to his mother and as if telling a secret, whispered in her ear, "But my bus driver is dead."


Kirkland told McGraw that it was Poland who helped Ethan conquer his fear of descending the steep school bus steps. Poland would cheer Ethan on and one day when the child hesitated and the mother went to help, the driver said, "Let him do it."


Since then, Ethan has had no problem.


But now his cheerleader won't be there, and Kirkland is anguished about her boy.


"Mr. Poland put him behind him so he could keep a good eye on him," she said.


Ethan hasn't been back to school yet. He's been busy opening birthday presents and playing with his favorite toys. On Wednesday, he made a new friend in Gov. Robert Bentley.


There's a picture from the event where little Ethan is sitting underneath the governor's desk. The child is beaming.


"Ethan is a loving, forgiving child," Kirkland said. "He is easy to go up to a perfect stranger and say, 'Can I have a hug?'"


That was the boy who went into that bunker. She is concerned it's not the child who came out.







Read More..

Cruise passenger: People thought ship was "going to tip over"

(CBS News) Four thousand people who have been adrift at sea for four days are finally nearing shore Thursday night. This evening, the Carnival cruise ship named Triumph is being towed into Mobile Bay, Ala., and is expected to dock by midnight.

She left Galveston, Texas, a week ago, loaded with her maximum 3,143 passengers and crew of 1,100. The brochure described a four-day cruise in the Caribbean, but an engine room fire left her adrift and powerless.

All aboard have suffered in squalid conditions, stranded as Carnival slowly brought the ship in.

When CBS News flew over the Carnival Triumph, it was within sight of shore -- but still seven hours away from the dock.

Cruise ship on the move after latest setback
Carnival cancels 12 more cruises on troubled ship
Inside Carnival cruise nightmare: Passenger describes deteriorating conditions

From up there we could see people waving, some with signs that appear to be made out of bed sheets. One said "SOS" -- save our ship -- but at this point it's not the ship that needs saving, it's the passengers.

The ship has been without power since an engine room fire five days ago. CBS News reached passenger Jacob Combs on the phone.

"The really bad part is there was no running water and toilets for almost the first 30 hours," Combs said. "Once they finally did get running water, the toilets only worked in certain places. I would say it's the worst smell imaginable."

Emailed photos (above) reveal squalid conditions. Many passengers used red plastic bags as toilets. Hundreds slept in hallways or topside to escape the foul and stagnate air below deck.

Carnival CEO Jerry Cahill insists passengers were never at risk. But 22-year old Leslie Mayberry disagreed.

"It was leaning to one side it was literally like walking up hill whenever the boat was leaning," she said. "I mean it was very scary," Mayberry said. "I mean a lot of people thought it was going to tip over and sink. And then you look out on the deck and you see the ocean and there is no one, you are just by yourself and you are so alone, even though you are around 3,000 other people on this boat."

The towline pulling the 14-story tall ship snapped, delaying Thursday's operation. It was re-attached, but it will be nightfall before the ship arrives at the terminal. Nellie Betts came from Tupelo, Miss., to meet her daughter.

"There's no reason why those people should be out there as long as they have. Why? I want to understand why," she said. "What is taking them so long to get them out?"

Once the ship arrives at the terminal, Carnival plans to put most of those passengers on a two-hour bus rid to New Orleans or even to Galveston, Texas, but some already are saying, "no thanks" - they have relatives picking them up in Mobile so they can go straight home.

Read More..

Nightmare Ends: Passengers Leave Disabled Ship












After five days without power in the Gulf of Mexico, the more than 4, 000 people aboard the Carnival Triumph returned home to the U.S., with many of them telling their horror stories for the first time.


Passengers began to disembark the damaged ship around 10:15 p.m. CT Thursday in Mobile, Ala. The last passenger disembarked the ship at 1 a.m. local time, according to Carnival's Twitter handle.


Passenger Brandi Dorsett was thankful to be home, especially for her mother who was with her on the ship. Dorsett said she wasn't pleased with the doctor on staff.


"My mother is a diabetic and they would not even come to the room because she cannot walk the stairs to help her with insulin. She hasn't had insulin in three days," Dorsett said.


The Carnival Triumph departed Galveston, Texas, last Thursday and lost power Sunday after a fire in the engine room disabled the vessel's propulsion system and knocked out most of its power.


After power went out, passengers texted ABC News that sewage was seeping down the walls from burst plumbing pipes, carpets were wet with urine, and food was in short supply. Reports surfaced of elderly passengers running out of critical heart medicine and others on board squabbling over scarce food.


"It's degrading. Demoralizing and then they want to insult us by giving us $500," Veronica Arriaga said after disembarking the ship.


Passengers were already being given a full refund for the cruise, transportation expenses and vouchers for another cruise. Carnival Cruise Lines is now boosting that offer to include another $500 per person.


As the ship docked, passengers lined the decks of the Triumph, waving and whistling to those on shore. "Happy V-Day" read a homemade sign made for the Valentine's Day arrival and another, more starkly: "The ship's afloat, so is the sewage."


Some still aboard chanted, "Let me off, let me off!" and "Sweet Home Alabama."






AP Photo/John David Mercer











Girl Disembarks Cruise Ship, Kisses the Ground Watch Video









Carnival CEO Gerry Cahill: 'I Want to Apologize' Watch Video









Carnival Cruise Ship Passengers Line Up for Food Watch Video





Click Here for Photos of the Stranded Ship at Sea


Kendall Jenkins was one of many passengers that were photographed kissing the ground when they exited the ship. Jenkins, like many passengers, created makeshift beds out of lounge chairs on the ship's deck after the raw sewage smell became too much to contend with.


"We kind of camped out by our lifeboat. We would have nightmares about Titanic basically happening," passenger Kendall Jenkins told ABC News Radio.


"I am just so blessed to be back home," she added.


WATCH: Carnival CEO Gerry Cahill Apologizes to Passengers


Approximately 100 buses were waiting to take passengers on the next stage of their journey. Passengers had the option to take a bus ride to New Orleans or Galveston, Texas, where the ill-fated ship's voyage began. From there, passengers will take flights home, which Carnival said they would pay for.


Inside the buses, Carnival handed out bags of food that included French fries, chicken nuggets, honey mustard barbecue sauce and apples.


Deborah Knight, 56, decided to stay in Mobile after the arduous journey was over rather than board a bus for a long ride. Her husband Seth drove in from Houston and they checked in at a downtown Mobile hotel.


"I want a hot shower and a daggum Whataburger," said Knight.


She said she was afraid to eat the food on board and had gotten sick while on the ship.


Cruise Ship Newlyweds Won't Be Spending Honeymoon on a Boat


For 24-year-old Brittany Ferguson of Texas, not knowing how long passengers had to endure their time aboard was the worst part.


"I'm feeling awesome just to see land and buildings," Ferguson said, who was in a white robe given to her aboard. "The scariest part was just not knowing when we'd get back," she told The Associated Press.


Carnival president and CEO Gerry Cahill praised the ship's crew and told reporters that he was headed on board to apologize directly to its passengers shortly before the Carnival Triumph arrived in Mobile.


"I know the conditions on board were very poor," Cahill said Thursday night. "I know it was very difficult, and I want to apologize again for subjecting our guests for that. ... Clearly, we failed in this particular case."


Luckily no one was hurt in the fire they triggered the power outage, but many passengers aboard the 900 foot colossus said they smelled smoke and were living in fear.






Read More..

The computer that never crashes






















A revolutionary new computer based on the apparent chaos of nature can reprogram itself if it finds a fault






















OUT of chaos, comes order. A computer that mimics the apparent randomness found in nature can instantly recover from crashes by repairing corrupted data.











Dubbed a "systemic" computer, the self-repairing machine now operating at University College London (UCL) could keep mission-critical systems working. For instance, it could allow drones to reprogram themselves to cope with combat damage, or help create more realistic models of the human brain.













Everyday computers are ill suited to modelling natural processes such as how neurons work or how bees swarm. This is because they plod along sequentially, executing one instruction at a time. "Nature isn't like that," says UCL computer scientist Peter Bentley. "Its processes are distributed, decentralised and probabilistic. And they are fault tolerant, able to heal themselves. A computer should be able to do that."












Today's computers work steadily through a list of instructions: one is fetched from the memory and executed, then the result of the computation is stashed in memory. That is then repeated – all under the control of a sequential timer called a program counter. While the method is great for number-crunching, it doesn't lend itself to simultaneous operations. "Even when it feels like your computer is running all your software at the same time, it is just pretending to do that, flicking its attention very quickly between each program," Bentley says.












He and UCL's Christos Sakellariou have created a computer in which data is married up with instructions on what to do with it. For example, it links the temperature outside with what to do if it's too hot. It then divides the results up into pools of digital entities called "systems".












Each system has a memory containing context-sensitive data that means it can only interact with other, similar systems. Rather than using a program counter, the systems are executed at times chosen by a pseudorandom number generator, designed to mimic nature's randomness. The systems carry out their instructions simultaneously, with no one system taking precedence over the others, says Bentley. "The pool of systems interact in parallel, and randomly, and the result of a computation simply emerges from those interactions," he says.












It doesn't sound like it should work, but it does. Bentley will tell a conference on evolvable systems in Singapore in April that it works much faster than expected.












Crucially, the systemic computer contains multiple copies of its instructions distributed across its many systems, so if one system becomes corrupted the computer can access another clean copy to repair its own code. And unlike conventional operating systems that crash when they can't access a bit of memory, the systemic computer carries on regardless because each individual system carries its own memory.


















The pair are now working on teaching the computer to rewrite its own code in response to changes in its environment, through machine learning.











"It's interesting work," says Steve Furber at the University of Manchester, UK, who is developing a billion-neuron, brain-like computer called Spinnaker (see "Build yourself a brain"). Indeed, he could even help out the UCL team. "Spinnaker would be a good programmable platform for modelling much larger-scale systemic computing systems," he says.













This article appeared in print under the headline "Machine, heal thyself"




















Build yourself a brain







The systemic computer takes its lead from nature (see main story), but so does Spinnaker, an ambitious project at the University of Manchester, UK, to build a one-billion-neuron computer from microchips. The idea is to create a supercomputer that works just like the human brain using the same ARM chips that power most smartphones. The team wants to do parallel simulation of large-scale neural networks using the equivalent of 1 per cent of the human brain's neuron count. They are well on their way: using chips that model 1000 neurons each, their system has created the equivalent of 750,000 neurons. "We're advancing slowly but steadily," says project leader Steve Furber.











































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.


If you are having a technical problem posting a comment, please contact technical support.








Read More..

French medical body for euthanasia in "exceptional" cases






PARIS: France's medical ethics council said Thursday that euthanasia should be allowed in exceptional cases and when suffering patients make "persistent and lucid requests."

Invoking a "duty to humanity," the body said that euthanasia should be reserved for "exceptional cases" like putting an end to "prolonged suffering", or "unbearable" pain.

President Francois Hollande had referred a report on allowing assisted suicide to the council to examine the precise circumstances under which such steps could be authorised with a view to producing draft legislation by June.

"The existing legislation does not meet the legitimate concerns expressed by people who are gravely and incurably ill," Hollande had said.

The report submitted to the council said physicians should be allowed to authorise interventions that ensure quicker deaths for terminal patients in three specific sets of circumstances.

In the first case, the patient involved would be capable of making an explicit request to that effect or have issued advance instructions in the event of him or her becoming incapable of expressing an opinion.

The second scenario envisages medical teams withdrawing treatment and/or nourishment on the basis of a request by the family of a dying patient who is no longer conscious and has not made any instructions.

The third would apply to cases where treatment is serving only to sustain life artificially.

-AFP/fl



Read More..

Woman found killed in home of 'blade runner' Pistorius








By Nkepile Mabuse, CNN


updated 4:47 AM EST, Thu February 14, 2013









STORY HIGHLIGHTS


  • NEW: News agency identifies the victim as Pistorius' girlfriend

  • The shooting occurs in the home of Oscar Pistorius

  • South African police say man, 26, was taken into custody

  • Pistorius is a double-amputee who ran with the aid of prosthetic limbs




Pretoria, South Africa (CNN) -- A 30-year-old woman was found fatally shot in the upscale Pretoria home belonging of South African Olympian Oscar Pistorius, police said Thursday.


Police said they have arrested a 26-year-old man -- the same age as Pistorius -- in connection with the shooting and that he will appear in Pretoria magistrate court sometime Thursday.


Pistorius, nicknamed the "Blade Runner," made history when he became the first Paralympian to compete in the able-bodied Olympics last year.


Police said Pistorius was cooperating with them.


The South African Press Association identified the victim as Pistorius' girlfriend, model Reeva Steenkamp. It attributed the information to Steenkamp's spokeswoman.


Several South African media outlets reported that the woman was mistaken for an intruder. Police Brig. Denise Beukes said she was aware of the reports, but could not confirm them.


A spokeswoman for Pistorius declined to comment. His father, Henke, told the South African Broadcasting Corporation said Pistorius was "sad at the moment."


"I don't know nothing. It will be extremely obnoxious and rude to speculate," the father said. "I don't know the facts."


A neighbor in the residential community alerted police to the shooting, Beukes said. When a CNN crew arrived, it saw a mortician's van leaving the house.


A pistol was recovered at the scene, police said.


South Africa has a high crime rate, and it's not unusual for homeowners to keep weapons to protect themselves from intruders.




Pistorius, a double-amputee, ran with the aid of prosthetic limbs during the London Olympics last year, the first Paralympian to compete in the able-bodied Olympics.


The runner's legs were amputated below the knee when he was a toddler because of a bone defect. He runs on special carbon fiber blades, hence the nickname.






While he failed to win a medal in the Olympics, his presence on the track was lauded as an example of victory over adversity and a lesson in dedication to a goal.


Pistorius was initially refused permission to compete against able-bodied competitors, but he hired a legal team to prove that his artificial limbs didn't give him an unfair advantage.


He smashed a Paralympic record to win the men's 400m T44 in the final athletics event of the 2012 Games.


The athlete was named one of People magazine's Sexiest Man Alive last year.












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Couple: "Calm" Dorner tied us up in our condo

LOS ANGELES A California couple says fugitive ex-police officer Christopher Dorner tied them up in their mountain condominium and stole their car before the firefight that led to his presumed death.

Karen and Jim Reynolds said at a news conference Wednesday that they came upon Dorner when they entered the condo in Big Bear, Calif. Tuesday, and believe he'd been there as early as Friday.

They say Dorner had a gun but said he wouldn't hurt them.




Play Video


SoCal breathing easier after deadly standoff



CBS Los Angeles station KCBS-TV reports Karen said, "He talked to us. Tried to calm us down. And saying very frequently he would not kill us."

"He was very calm and very methodical," said Karen.

Authorities couldn't immediately verify their story, but it matched early reports from law enforcement officials. Later reports said the incident involved two women from a cleaning crew.




18 Photos


Ex-LAPD cop accused of going on killing spree



The Reynolds said they went to the cabin noon to clean it for rental purposes, and that's when they -- and not two cleaning ladies as had been reported - met up with Dorner, KCBS says.

The Reynolds say he tied their arms and put pillowcases over their heads before fleeing in their Nissan.

Karen Reynolds managed to get to her cell phone and dial 911.

The couple, who said Dorner had his gun drawn the entire time, said they were with the suspect for 15 minutes, KCBS adds. "It felt like a lot longer," said Karen. "I really thought that it was the end."

Read More..

Dorner Not IDed, But Manhunt Considered Over













Though they have not yet identified burned remains found at the scene of Tuesday's fiery, armed standoff, San Bernardino, Calif., officials consider the manhunt over for Christopher Dorner, the fugitive ex-cop accused of going on a killing spree.


"The events that occurred yesterday in the Big Bear area brought to close an extensive manhunt," San Bernardino County Sheriff John McMahon told reporters this evening.


"I cannot absolutely, positively confirm it was him," he added.


However, he noted the physical description of the suspect authorities pursued to a cabin at the standoff scene, as well as the suspect's behavior during the chase and standoff, matched Dorner, 33.


The charred remains of the body believed to be Dorner were removed from the cabin high in the San Bernardino Mountains near Big Bear, Calif., the apparent site of Dorner's last stand. Cornered inside the mountain cabin Tuesday, the suspect shot at cops, killing one deputy and wounding another, before the building was consumed by flames.


"We did not intentionally burn down that cabin to get Mr. Dorner out," McMahon said tonight, though he noted pyrotechnic canisters known as "burners" were fired into the cabin during a tear gas assault in an effort to flush out Dorner. The canisters generate high temperatures, he added.


The deputies wounded in the firefight were airlifted to a nearby hospital, where one died, police said.








Christopher Dorner Believed Dead After Shootout with Police Watch Video









Carjacking Victim Says Christopher Dorner Was Dressed for Damage Watch Video









Christopher Dorner Manhunt: Inside the Shootout Watch Video





The deceased deputy was identified tonight as Det. Jeremiah MacKay, 35, a 15-year veteran and the father of two children -- a daughter, 7, and son, 4 months old.


"Our department is grieving from this event," McMahon said. "It is a terrible deal for all of us."


The Associated Press quoted MacKay on the Dorner dragnet Tuesday, noting that he had been on patrol since 5 a.m. Saturday.


"This one you just never know if the guy's going to pop out, or where he's going to pop out," MacKay said. "We're hoping this comes to a close without more casualties. The best thing would be for him to give up."


The wounded deputy, identified as Alex Collins, was undergoing multiple surgeries for his wounds at a hospital, McMahon said, but was expected to make a full recovery.


Before the final standoff, Dorner was apparently holed up in a snow-covered cabin in the California mountains just steps from where police had set up a command post and held press conferences during a five-day manhunt.


The manhunt for Dorner, one of the biggest in recent memory, led police to follow clues across the West and into Mexico, but it ended just miles from where Dorner's trail went cold last week.


Residents of the area were relieved today that after a week of heightened police presence and fear that Dorner was likely dead.


"I'm glad no one else can get hurt and they caught him. I'm happy they caught the bad guy," said Ashley King, a waitress in the nearby town of Angelus Oaks, Calif.


Hundreds of cops scoured the mountains near Big Bear, a resort area in Southern California, since last Thursday using bloodhounds and thermal-imaging technology mounted to helicopters, in the search for Dorner. The former police officer and Navy marksman was suspected to be the person who killed a cop and cop's daughter and issued a "manifesto" declaring he was bent on revenge and pledging to kill dozens of LAPD cops and their family members.


But it now appears that Dorner never left the area, and may have hid out in an unoccupied cabin just steps from where cops had set up a command center.






Read More..

Obama keeps faith in science and warns of cyber threats



Peter Aldhous, San Francisco bureau chief
"IT IS our unfinished task to restore the basic bargain that built this country - the idea that if you work hard and meet your responsibilities, you can get ahead."

In adopting the phrase "unfinished task" as a signature motif for his 2013 State of the Union address, President Barack Obama signalled a return to familiar themes. For those who care about investment in science, that was a reassuring message. 
The fight against global warming and the importance of technology to protect national security also got high billing. On the latter, Obama signaled that hacking skills, rather than kilotons, are increasingly a crucial currency, promising a new focus on combating cyberattacks - paralleled by negotiated cuts to the US nuclear arsenal. 




In a combative speech designed to counter Republican opponents who want to cut the budget deficit by curbing spending on Obama's priorities - including education and research - the President made the case for continued investment in innovation.
"Every dollar we invested to map the human genome returned $140 to our economy. Today, our scientists are mapping the human brain to unlock the answers to Alzheimer's; developing drugs to regenerate damaged organs; devising new material to make batteries ten times more powerful. Now is not the time to gut these job-creating investments in science and innovation. Now is the time to reach a level of research and development not seen since the height of the Space Race."
The estimate of a 140:1 return on investment in genomics comes from a 2011 study by the Battelle Memorial Institute in Columbus, Ohio. While the precise numbers from that analysis have been questioned, the importance of continued innovation to America's future economic competitiveness has been stressed in multiple reports, notably from the US National Academies. 
"Now our enemies are also seeking the ability to sabotage our power grid, our financial institutions, and our air traffic control systems. We cannot look back years from now and wonder why we did nothing in the face of real threats to our security and our economy."
Obama called on Congress to pass new legislation to counter threats from hackers backed by hostile governments. That won't be easy: last year, a bill that would have demanded that companies meet minimum standards for cybersecurity, and report if they are attacked, foundered amid complaints that it would impose large costs on US businesses. 



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Pope makes first appearance since shock resignation






VATICAN CITY: Pope Benedict XVI made his first public appearance Wednesday since the shock announcement of his resignation, sticking with his schedule by presiding over his weekly general audience.

Tickets to the event in the Vatican's Paul VI auditorium were issued well in advance, so several thousand pilgrims experienced the historic moment out of sheer luck just two days after the 85-year-old Benedict said he would step down at the end of the month.

The pope will then celebrate Ash Wednesday mass at 1600 GMT, his last public mass and one of his final engagements as pontiff.

The mass is traditionally held in the Santa Sabina Church on Rome's Aventine Hill, but has been moved to St Peter's Basilica out of respect for the outgoing pontiff and to accommodate the crowd of faithful who will want to mark the end of his eight-year rule -- one of the shortest in the Church's modern history.

"It will be an important concelebration, and the last led by the Holy Father in Saint Peter's," Vatican spokesman Federico Lombardi said.

The high point of Wednesday's mass, which launches the traditional period of penitence ahead of Easter in the Christian calendar, will see the pope mark the foreheads of the faithful with ashes.

Lombardi has said he expects a new pope in place in time for Easter, which falls on March 31 this year, although no date has yet been set for the secret conclave to elect a new leader of the world's 1.2 billion Catholics.

In the meantime, the outgoing pontiff will honour his existing engagements.

On Thursday he will hold his annual meeting with the pastors of Rome. And before he steps down at the end of the month he will also meet the presidents of Guatemala and Romania, as scheduled.

Next week will be given over to a spiritual retreat at the Vatican which is sure to be dominated by jockeying among factions within the College of Cardinals over the choice of Benedict's successor.

Benedict's decision to step down -- making him the first pontiff in 700 years to resign simply because he cannot carry on -- sparked a flurry of rumours over his health, fed by revelations that he had had an operation to replace the batteries in his pacemaker three months ago.

Some observers saw Benedict's decision as a bid to avoid the fate of his predecessor John Paul II, whose drawn-out and debilitating illness was played out on the world's stage.

But Lombardi insisted: "The pope is well and his soul is serene.

"He did not resign the pontificate because he is ill but because of the fragility that comes with old age."

After Ash Wednesday Benedict will, on the next two Sundays, will recite the Angelus from his apartment window and hold his final general audience, this time in St. Peter's Square on February 27, before retiring to a little-known monastery within Vatican walls.

Soon a new pope will be installed in the papal apartments, with his predecessor just a stone's throw away.

But Benedict will spend his time in prayer rather than giving advice, the Vatican says.

As rumours fly over front-runners for St. Peter's chair, commentators have said age may be a key factor in selecting a new pope, although any of the 117 cardinals eligible to vote is likely to be chosen.

While some hope Africa or Asia could yield the next pontiff, others have tipped high-flying European or North American cardinals. The new pope will have to face up to the growing secularism in the West, one of the Church's biggest challenges.

Only one other pope has resigned because of an inability to carry on -- Celestine V in 1294 -- a humble hermit who stepped down after just a few months saying he could no longer bear the intrigue of Rome.

-AFP/fl



Read More..

Hear suspect's gunfight with cops





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Read More..

Not surprisingly, House GOP pans State of the Union




Play Video


Obama: Both parties know sequester cuts "a really bad idea"



It shouldn't come as a shock that congressional Republicans weren't very impressed by President Obama's State of the Union address. 

For his part, the president didn't hide his suggestion that it's Republicans who are resistant to compromise, leading some Republicans to jab the president, particularly regarding his lack of clarity on how he would replace the so-called sequester cuts set to slash defense and domestic spending on March 1.

"What has he done?" asked Rep. Cory Gardner, R-Colo. "He signed the sequester, he agreed to the sequester, he came up with the sequester and then he complains about House solutions to actually try to deal with it. This president is more interested in campaign-style rhetoric than actual solutions."

While many said there is some room to work with Mr. Obama on issues like immigration, and even some gun safety measures, his new proposals on everything from education to repairing the nation's crumbling bridges were panned not necessarily based on merit, but on the president's claim that the new programs would not increase the deficit "by a single dime."

"I think it doesn't pass the laugh test" said the chairman of the conservative House Republican Study group Rep. Steve Scalise, R-La. "People realize the President promised to cut the deficit in half and it's more than doubled."

"It's economic fairy dust that this President's working with," added Gardner.

On the president's call to address climate change and become more energy independent, Rep. Lee Terry, R-Neb., called the president's silence on giving the green light to construct the Keystone XL pipeline to pump oil from Canada to the Gulf of Mexico "deafening."

Chairman of the House Energy and Commerce Committee Fred Upton, R-Mich., also said "With a stroke of the pen, the president could unleash this $7 billion private sector investment. Yet nowhere in this evening's blueprint for the president's policy vision was this critical middle-class jobs project."

Rep. Raul Labrador, R-Idaho, who is expected to be a key House Republican player in immigration talks as a Hispanic-American from a conservative state, said the president's State of the Union this year was "one of the least inspiring speeches I ever heard him give."

But Labrador said he does think Republicans and Democrats will ultimately be able to come together on an overhaul of the nation's immigration system.

"As long as the president and his party don't draw a red line and say that they have to get everything that they want."

Labrador was less optimistic about gun control. He compared his home state of Idaho with low crime and few gun regulations to Mr. Obama's home state of Illinois as an example of why gun laws aren't necessarily effective.

"It has the most stringent gun control legislation and it has some of the highest crime in the United States" Labrador said of Illinois. "Clearly gun control is not going to protect those families."

And while Labrador said he believes the president cares about the victims of gun violence and their families that attended the speech, he said they should not be used as "political pawns."

Labrador said, however, that as a father of five children he was so upset by the Sandy Hook Elementary School massacre that he could not speak of the shooting for two days. He said "if there's things that we can do to save lives without violating the second amendment I think we should consider it."

Democrats gave the speech high marks. In a statement, Minority Leader Nancy Pelosi, D-Calif., said she urged the two parties to work together and said "it is time to heed the President's call for real progress to reverse the rising tide of climate change, enact comprehensive immigration reform, and prevent gun violence."

Read More..

Charred Human Remains Found in Burned Cabin













Investigators have located charred human remains in the burned out cabin where they believe suspected cop killer and ex-LAPD officer Christopher Dorner was holed up as the structure burned to the ground, police said.


The human remains were found within the debris of the burned cabin and identification will be attempted through forensic means, the San Bernardino County Sheriff-Coroner Department said in a press release early this morning.


Dorner barricaded himself in the cabin in the San Bernardino Mountains near Big Bear Tuesday afternoon after engaging in a gunfight with police, killing one officer and injuring another, the San Bernardino County Sheriff's Department said.


Cindy Bachman, spokeswoman for the San Bernardino County Sheriff's Department, which is the lead agency in the action, said Tuesday night investigators would remain at the site all night.


FULL COVERAGE: Christopher Dorner Manhunt


When Bachman was asked if police thought Dorner was in still in the burning cabin, she said, "Right… We believe that the person that barricaded himself inside the cabin engaged in gunfire with our deputies and other law enforcement officers is still inside there, even though the building burned."


Bachman spoke shortly after the Los Angeles Police Department denied earlier reports that a body was found in the cabin, contradicting what law enforcement sources told ABC News and other news organizations.








Christopher Dorner Manhunt: Police Exchange Fire With Possible Suspect Watch Video











Fugitive Ex-Cop Believed Barricaded in Cabin, California Cops Say Watch Video





Police around the cabin told ABC News they saw Dorner enter but never leave the building as it was consumed by flames, creating a billowing column of black smoke seen for miles.


A press conference is scheduled for later today in San Bernardino.


One sheriff's deputy was killed in a shootout with Dorner earlier Tuesday afternoon, believed to be his fourth and victim after killing an LAPD officer and two other people this month, including the daughter of a former police captain, and promising to kill many more in an online manifesto.



PHOTOS: Former LAPD Officer Suspected in Shootings


Cops said they heard a single gunshot go off from inside the cabin just as they began to see smoke and fire. Later they heard the sound of more gunshots, the sound of ammunition being ignited by the heat of the blaze, law enforcement officials said.


Police did not enter the building, but exchanged fire with Dorner and shot tear gas into the building.


One of the largest dragnets in recent history, which led police to follow clues across the West and into Mexico, apparently ended just miles from where Dorner's trail went cold last week.


Police got a break at 12:20 p.m. PT, when they received a 911 call that a suspect resembling Dorner had broken into a home in the Big Bear area, taken two hostages and stolen a car.


The two hostages, who were tied up by Dorner but later escaped, were evaluated by paramedics and were determined to be uninjured.


Officials say Dorner crashed the stolen vehicle and fled on foot to the cabin where he barricaded himself and exchanged fire with deputies from the San Bernardino Sheriff's Office and state Fish and Game officers.


Two deputies were wounded in the firefight and airlifted to a nearby hospital, where one died, police said. The second deputy was in surgery and was expected to survive, police said.


Police sealed all the roads into the area, preventing cars from entering the area and searching all of those on the way out. Are schools were briefly placed on lockdown.






Read More..

Arctic sunshine cranks up threat from greenhouse gases









































IT'S a solar double whammy. Not only does sunlight melt Arctic ice, but it also speeds up the conversion of frozen organic matter into carbon dioxide.











The amount of carbon in dead vegetation preserved in the far northern permafrost is estimated to be twice what the atmosphere holds as CO2. Global warming could allow this plant matter to decompose, releasing either CO2 or methane – both greenhouse gases. The extent of the risk remains uncertain because the release mechanisms are not clear.













Rose Cory at the University of North Carolina at Chapel Hill and her colleagues analysed water from ponds forming on melting permafrost at 27 sites across the Arctic. They found that the amount of CO2 released was 40 per cent higher when the water was exposed to ultraviolet light than when kept dark. This is because UV light, a component of sunlight, raises the respiration rate of soil bacteria and fungi, amplifying the amount of organic matter they break down and the amount of CO2 released.












The thawing Arctic is emerging as a potentially major source of positive feedback that could accelerate global warming beyond existing projections. "Our task now is to quantify how fast this previously frozen carbon may be converted to CO2, so that models can include the process," Cory says.












Journal reference: PNAS, DOI: 10.1073/pnas.1214104110.




















































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Shocked world media speculates on pope's successor






MANILA: The world's media speculated on whether the next pontiff may come from the developing world, while paying mixed tributes to Pope Benedict XVI following his shock resignation announcement.

The 85-year-old Benedict said on Monday that he would step down at the end of this month because of health reasons, becoming the first leader of the Catholic Church to resign of his own free will in 700 years.

Argentina's largest selling newspaper, Clarin, ran a headline on its website asking whether the next pope might hail from the Americas, Asia or Africa rather than Europe, where all popes have come from through the centuries.

"After the virtually unprecedented decision by the head of the church to resign, there is a growing possibility that deeply established traditions and criteria might change in the next choosing of the pope and there could be a surprise," the report said.

Clarin said this was not just a matter of geography but something that went much deeper.

Catholicism is in serious decline in Europe but growing robustly in Africa and Asia. And Latin America, despite fervent adherence to the faith being patchy, is home to 40 percent of the world's Catholics, the paper noted.

In the Philippines, the Catholic Church's stronghold in Asia, the pope's decision dominated the front pages of newspapers, while major Internet news sites focused on whether Filipino Cardinal Luis Antonio Tagle may succeed him.

"He has the rare chance, like 116 others, to choose the leader of the world's 1.2 billion Catholics. And who knows? He himself may become Pope Benedict XVI's successor," news portal Rappler wrote of Cardinal Tagle.

The pope's resignation made the front pages of most British newspapers, which largely praised his personal qualities, but they also called for the next pope, whether he is from Europe, Asia, Africa or the Americas, to bring about reform.

In an editorial, The Guardian said that Benedict's papacy was "theologically, politically and organisationally a continuation of that of John Paul II, with all its defects and its virtues".

It painted a sober picture of the future, saying that "not a single liberal candidate to succeed Benedict can be identified".

The Times described Benedict's resignation in an editorial as a "noble and selfless decision" but said his successor should try to make the Catholic church "a more collegial venture".

The Independent newspaper focused on the future with the headline "Situation Vacant: New leader wanted for 1.2 billion Roman Catholics".

It added that Benedict's announcement "plunges his Church into turmoil".

In France, daily Catholic newspaper La Croix praised Benedict for making a tough decision.

"This is a man of faith who has decided to resign with the consciousness of having given everything he could for the good of the Church," the newspaper said.

Conservative French newspaper Le Figaro published a special edition in which it welcomed the "humility" of Benedict XVI, who "felt that the challenges of the contemporary church exceeded its powers".

The pope's resignation also made the front pages in Australia, with Rupert Murdoch's national daily newspaper The Australian carrying a headline that said: "Pope Benedict surrenders: too old, too frail to lead a billion people".

In an opinion piece, the newspaper's foreign editor said Benedict was "a good man but a poor pope".

"Benedict was always going to have a hard time following in the footsteps of John Paul II, the most charismatic, and perhaps the most influential, pope in the 20th century," wrote Greg Sheridan.

"But he disappointed even his closest supporters."

- AFP/al



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North Korea says it conducted third nuclear test






STORY HIGHLIGHTS


  • NEW: The test is "a significant step forward" for the North's program, an analysts says

  • Obama calls the test "highly provocative," calls for "swift" international action

  • North Korea confirms it carried out a more powerful test

  • It says it used a smaller, lighter bomb than in previous tests




Hong Kong (CNN) -- North Korea said Tuesday that it had conducted a new, more powerful underground nuclear test using more sophisticated technology, jolting the already fragile security situation in Northeast Asia and drawing condemnation from around the globe.


It is the first nuclear test carried out under the North's young leader, Kim Jong Un, who appears to be sticking closely to his father's policy of building up the isolated state's military deterrent to keep its foes at bay, shrugging off the resulting international condemnation and sanctions.


It also provided a provocative reminder of a seemingly intractable foreign policy challenge for President Barack Obama ahead of his State of the Union address later Tuesday.


"The test was carried out as part of practical measures of counteraction to defend the country's security and sovereignty in the face of the ferocious hostile act of the U.S.," the North's state-run Korean Central News Agency (KCNA) said, referring to new U.S.-led sanctions on Pyongyang in the wake of a recent long-range rocket launch.








The nuclear test Tuesday, which follows previous detonations by the North in 2006 and 2009, had greater explosive force and involved the use of a smaller, lighter device, KCNA reported.


North Korea's nuclear program is shrouded in secrecy, so it's almost impossible to independently verify many of the details of the test. But its claims play into fears among the United States and its allies that Pyongyang is moving closer to the kind of miniaturized nuclear device that it can mount on a long-range missile.


Despite the North's claims of progress Tuesday, analysts say they believe it is still years away from having the technology to deliver a nuclear warhead on a missile.


"This test isn't going to do that in and of itself, but it is a significant step forward," said Mike Chinoy, a senior follow at the University of Southern California's U.S.-China Institute.


Condemnation from world leaders


After Pyongyang confirmed it had gone ahead with the test in defiance of international pressure, world leaders responded with condemnation.


"This is a highly provocative act" that threatens regional stability, breaches U.N. resolutions and increases the risk of proliferation, Obama said in a statement.


"North Korea's nuclear weapons and ballistic missile programs constitute a threat to U.S. national security and to international peace and security," he said. "The United States remains vigilant in the face of North Korean provocations and steadfast in our defense commitments to allies in the region."


Obama called for "further swift and credible action by the international community" in response to Pyongyang's actions.


"It is a clear and grave violation of the relevant Security Council resolutions," the office of Ban Ki-moon, the secretary-general of the United Nations, said in a statement referring to the test.


The United Nations Security Council will meet in New York on Tuesday morning to discuss the development, a security council diplomat said, declining to be identified because of U.N. protocol on such matters.


Japanese Prime Minister Shinzo Abe said the test was "extremely regrettable," adding that Tokyo would "strongly" protest it.


Seismic activity


U.S. seismologists reported a disturbance on Tuesday morning in North Korea centered near the site of the secretive regime's two previous atomic blasts.






The area around thepicenter of the tremor in northeastern North Korea has little or no history of earthquakes or natural seismic hazards, according to U.S. Geological Survey maps.


The disturbance reported Tuesday had a magnitude of 5.1 -- upgraded from an initial estimate of 4.9 -- took place at a depth of about 1 kilometer, the USGS said.


Kim Min-seok, a spokesman for the South Korean defense ministry, said the magnitude of the "artificial tremor" suggested the size of the blast could be in the order of 6 to 7 kilotons, more powerful than the North's two prior nuclear tests.


That calculation, though, was based on the USGS's initial estimate of a 4.9-magnitude seismic disturbance, he said. A 5.1-magnitude tremor could indicate a 10 kiloton explosion.


The China Earthquake Network Center said on its website that the seismic disturbance in North Korea was a "suspected explosion."


News breaks at a quiet time in Asia


The test took place at a time when several East Asian countries, including China, North Korea's major ally, are observing public holidays for the Lunar New Year, which began Sunday.


It also comes ahead of the birthday on Saturday of Kim Jong Il, the former North Korean leader who died in December 2011 and was succeeded by his son, Kim Jong Un.


North Korea announced last month that it was planning a new nuclear test and more long-range rocket launches, all of which it said were part of a new phase of confrontation with the United States.


It made the threats two days after the United Nations Security Council had approved the broadening of sanctions on the reclusive, Stalinist regime in response to the North's launching of a long-range rocket in December that succeeded in putting a satellite in orbit.


Pyongyang said it carried out the launch for peaceful purposes, but it was widely considered to be a test of ballistic missile technology.


U.S. analysts say North Korea's first bomb test, in October 2006, produced an explosive yield at less than 1 kiloton (1,000 tons) of TNT. A second test in May 2009 is believed to have been about two kilotons, National Intelligence Director James Clapper told a Senate committee in 2012.


By comparison, the bomb the United States dropped on Hiroshima in 1945 was a 15-kiloton device.


In May 2012, North Korea said it had amended its constitution to formally proclaim itself a "nuclear state."


CNN's Jethro Mullen reported and wrote from Hong Kong. CNN's K.J. Kwon in Seoul, South Korea; Yoko Wakatsuki and Junko Ogura in Tokyo; Judy Kwon in Hong Kong; Dana Ford and Matt Smith in Atlanta, Georgia; Anna Maja Rappard in New York; and Elise Labott in Washington contributed to this report. Journalists Katie Hunt in Hong Kong and Connie Young in Beijing also contributed reporting.






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