Friday, June 14, 2013

Twitter Opens Up Tweet Performance Analytics To All, For Free

Screen Shot 2013-06-13 at 9.16.03 AMTwitter now provides you with pretty extensive metrics and analytics for the performance of your tweets via its Ads dashboard (via TNW), in a move that looks designed to get more people (including individuals) aware of and using the Twitter Ads platform. The new free analytics dashboard access allows anyone to see the performance of their tweets, including how many Faves, Retweets and Replies each has received, as well as letting them sort by "Best, Good or All" for at-a-glance ranking of tweet performance.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/vwPMCmx5e6Y/

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Thursday, May 23, 2013

Red Cross' Birthday Wish for Moore, Okla.

May 21, 2013 2:35pm

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(Image credit: @redcrossokc/Twitter; Sue Ogrocki/AP Photo)

Volunteers from the American Red Cross are on the ground in Moore, Okla., where a violent tornado tore through homes, a hospital and two elementary schools killing 24 people and injuring at least 240 more.

Full coverage of the Oklahoma tornado

The organization, which provides food, shelter, blood and mental health services for disaster survivors, turns 132 today. Its birthday wish? To support and comfort the residents of Moore for ?as long as it takes.?

?We?re there to help communities recover and rebuild,? said Red Cross spokeswoman Anne Marie Borrego. ?Our hearts go out to those affected by this tragedy, and we want to be there to help today and tomorrow and as long as it takes.?

Founded May 21, 1881, the American Red Cross works closely with the Federal Emergency Management Agency to respond to more than 70,000 natural and man-made disasters a year in the U.S., according to its website.

?Our members respond to a disaster every eight minutes,? said Borrego, noting that most of the disasters are house fires. ?We?re a national organization, but we?re built on local chapters and in communities across the country.?

In its 132 years, the Red Cross has grown and expanded its reach, using the latest technology and social media to connect to people in need.

?In 1881, it was much smaller,? said Red Cross historian Susan Watson, explaining how founder Clara Barton had ?a handful? of volunteers collecting money at local gatherings as reports of a disaster landed in newspapers.

?Social media is allowing us to reach much further and get the word out much faster,? Watson said.

The response is faster, too. It took six days to get help to deliver aid after the Johnstown, Pa., flood of 1889, according to Watson.

?In Moore, we?re there now,? she added.

The organization was actually chartered by the United States Congress to ?carry on a system of national and international relief in time of peace and apply the same in mitigating the sufferings caused by pestilence, famine, fire, floods and other great national calamities, and to devise and carry on measures for preventing the same,? according to its website, working hand-in-hand with the Federal Emergency Management Agency.

Ninety-one cents of every dollar donated goes towards its humanitarian programs, according to Borrego.

The Oklahoma tornado tragedy hit close to home for her, she said, and affected everyone at the Red Cross.

?My mother?s from Oklahoma and I grew up driving past Moore on the 35, I can?t even count the number of times,? she said. ?We?ll be there to help the community with whatever they need.?

The easiest way to help the Red Cross support the people of Moore is to donate money online at RedCross.org or by texting ?REDCROSS? to 90999 (the text will automatically donate $10).

Source: http://abcnews.go.com/blogs/health/2013/05/21/red-cross-birthday-wish-for-moore-okla/

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A Stark Reminder That Drones Are Filling Our Skies

It's hard to avoid the increasing prevalence of drones, but in case you were in any doubt this artwork?Under the Shadow of the Drone?serves as a stark reminder that they're increasingly filling our skies.

Read more...

    


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/PKz0HNlf3k4/a-stark-reminder-that-drones-are-filling-our-skies-509243013

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Wednesday, May 22, 2013

Conn. rail service returns to normal

NEW HAVEN, Conn. (AP) ? Regular train service returned to Connecticut on Wednesday, five days after a derailment injured scores of commuters and damaged tracks.

Commuter rail service from Connecticut to New York City, along with Amtrak service between Boston and New York, was back on schedule on one of the nation's oldest and most heavily traveled railways.

Aaron Donovan, a spokesman for Metropolitan Transportation Authority, which operates Metro-North, said there were no major problems or delays reported.

"Trains are running normally," he said. "We're back at full strength, a full schedule on the New Haven line for the first time since Friday."

The Metro-North crash at rush hour Friday evening injured 72 people, including one who remained in critical condition Tuesday. It snarled commutes for roughly 30,000 people who normally use the train, forcing travelers to navigate a patchwork of cars, trains and buses.

The repairs will require a reduced speed of 30 mph for several days, which officials say is standard for new track installations. Donovan said that was extending the travel time by only a few minutes.

"We recognize the critical importance of both Metro-North Railroad and Amtrak to the regional economy," Metro-North President Howard Permut said Tuesday.

The National Transportation Safety Board is investigating the accident. Officials have said they are looking at two sections of rail found at the crash scene which appear to have broken apart, to determine if the damage occurred during or before the crash.

Robert Kulat, a spokesman for the Federal Railroad Administration, said Metro-North visually inspected the tracks on May 15, two days before the accident, and found they were properly aligned, and the wood, steel and other construction materials were in good shape. He also said an inspection in April with a machine found no defects.

"It's like an ultrasound for rail," Kulat said of the earlier inspection.

Donovan could not confirm the inspection, referring all questions on the investigation to the NTSB.

The tracks have been rebuilt to current Federal Railroad Administration standards using all new materials and underwent rigorous testing, officials said. Railroad officials said the speed of the rebuilding effort was the result of hundreds of skilled people in multiple crafts working around the clock since Saturday night.

Connecticut lawmakers plan hearings about the crash on the rail network they say is in need of extensive improvements.

Members of the General Assembly's Transportation Committee said they have been briefed by state transportation officials over the years about the hefty investment Connecticut needs to make to fully upgrade the commuter rail line, including a couple of 100-year-old bridges that need to be replaced.

Some commuters used a shuttle train that ran between New Haven and Bridgeport, where a bus connection to Stamford circumvented the accident scene, and finally customers boarded a train for New York.

Source: http://news.yahoo.com/conn-rail-returns-normal-112926941.html

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Famous Prime Number Conjecture One Step Closer to Proof

Infinity down, only 69,999,997 to go.

New research has proven that prime numbers don't just disappear as numbers get larger ? instead, there is an infinite number of prime numbers separated by a distance of at most 70 million.

The new proof, accepted this month for publication in the journal Annals of Mathematics, takes the field one step closer to solving the twin prime conjecture, a famous mathematical idea that suggests the existence of an infinite number of prime numbers separated by a distance of 2 (for example, the prime numbers 11 and 13, which are separated by 2). Prime numbers are those that are divisible by only themselves and 1.

Prior to this discovery, mathematicians suspected there were infinitely many twin primes, or prime numbers separated by two, but proofs hadn't set bounds on how far apart primes could be separated. [The 9 Most Massive Numbers in Existence]

"It's a huge step forward in terms of showing that there are primes close together," said Daniel Goldston, a mathematician at San Jose State University in California. "It's a big huge step toward the twin prime conjecture."

Other mathematicians also applauded the achievement, and its author, Yitang Zhang, a mathematician unknown in the field. "Basically, no one knows him," said Andrew Granville, a number theorist at the Universit? de Montr?al, as quoted by the Simons Foundation. "Now, suddenly, he has proved one of the great results in the history of number theory."

Simple observation ? tough solution

In the 1800s, mathematician Alphonse de Polignac noticed a strange trend in prime numbers. Though so-called twin primes get less common as numbers get bigger, de Polignac became convinced that there were infinitely many twin primes.

But proving it was another matter.

These problems "are very attractive to people because the problems themselves are not difficult to understand, but the solution ? the proof ? could be very difficult," said Zhang of the University of New Hampshire.

Many attempts relied on finding primes using sieve methods, which essentially involves crossing out numbers that have larger and larger factors to find primes (for instance, crossing out all the numbers divisible by 2, then 3, then 5, then 7, and so on).

All of the small primes can be manually calculated, and if numbers get large enough, mathematicians can generalize the technique. But in between small numbers and big ones is a vast terrain where primes are too big calculate with the sieve, but too small to make generalizations about.

In 2005, Daniel Goldston, a mathematician at San Jose State University in California, and his colleagues J?nos Pintz and Cem Yildirim developed a new method (called GPY) to make claims for that middle range of numbers in order to prove that the numerical gaps between prime numbers are bounded, and not infinite.

"Our method got right up to the point where you would approach getting this bounded gaps result, but we couldn't get it," Goldston said.

Crossing the gap

Zhang had been trying to find a way to close the gap in the GPY method for years. But last summer, he felt a breakthrough was close and devoted all his efforts to cracking the prime problem.

He finally developed set of new mathematical methods and used them to overcome the gap in prior work.

The math community hasn't thoroughly scrutinized the proof to ensure it's airtight, but several mathematicians in the field have done a first-pass check and found the logic sound.

The current known maximum gap between primes is 70 million, but that number may come down dramatically with further iterations of the proof.

Still, it's unlikely that the same methods could be used to prove the twin prime conjecture, Goldston said.

"We are pretty sure these methods aren't going to get down to two," Goldston said. "You have to have some new ideas."

Follow Tia Ghose on Twitter and Google+.?Follow?LiveScience @livescience, Facebook?& Google+. Original article on?LiveScience.com.

Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Source: http://news.yahoo.com/famous-prime-number-conjecture-one-step-closer-proof-121904546.html

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Tuesday, May 21, 2013

Crews dig through night after deadly Okla. twister

MOORE, Okla. (AP) ? Spotlights bore down on massive piles of shredded cinder block, insulation and metal as crews worked through the night early Tuesday lifting bricks and parts of collapsed walls where a monstrous tornado barreled through the Oklahoma City suburbs, demolishing an elementary school and reducing homes to piles of splintered wood. At least 51 people were killed, including at least 20 children, and those numbers were expected to climb, officials said.

The storm left scores of blocks in Moore barren and dark. Rescuers walked through neighborhoods where Monday's powerful twister flattened home after home and stripped leaves off of trees to see if they could hear any voices calling out from the rubble.

As Monday turned into Tuesday, the town of Moore, a community of 41,000 people 10 miles south of the city, braced for another harrowing, long day.

"As long as we are here ... we are going to hold out hope that we will find survivors," said Trooper Betsy Randolph, a spokeswoman for the Oklahoma Highway Patrol.

More than 120 people were being treated at hospitals, including about 50 children. Amy Elliott, spokeswoman for the Oklahoma Medical Examiner's Office, said Tuesday that there could be as many as 40 more fatalities from Monday's tornado.

Families anxiously waited at nearby churches to hear if their loved ones were OK. A man with a megaphone stood Monday evening near St. Andrews United Methodist Church and called out the names of surviving children. Parents waited nearby, hoping to hear their sons' and daughters' names.

While some parents and children hugged each other as they reunited, others were left to wait, fearing the worst as the night dragged on.

Crews continued their desperate search-and-rescue effort throughout the night at Plaza Towers Elementary, where the storm had ripped off the school's roof, knocked down walls and turned the playground into a mass of twisted plastic and metal as students and teachers huddled in hallways and bathrooms.

Children from the school were among the dead, but several students were pulled out alive earlier Monday from under a collapsed wall and other heaps of mangled debris. Rescue workers passed the survivors down a human chain of parents and neighborhood volunteers. Parents carried children in their arms to a triage center in the parking lot. Some of the students looked dazed while others appeared terrified.

James Rushing, who lives across the street from the school, heard reports of the approaching twister and ran to the school, where his 5-year-old foster son, Aiden, attends classes. Rushing believed he would be safer there.

"About two minutes after I got there, the school started coming apart," he said.

As dusk fell, heavy equipment rolled up to the school, and emergency workers wearing yellow crawled among the ruins, searching for survivors. Crews used jackhammers and sledgehammers to tear away concrete, and chunks were being thrown to the side as the workers dug.

Douglas Sherman drove two blocks from his home to help.

"Just having those kids trapped in that school, that really turns the table on a lot of things," he said.

Another school, Briarwood Elementary, was also damaged by the tornado, but not as extensively as Plaza Towers.

Oklahoma Gov. Mary Fallin deployed 80 National Guard members to assist with rescue operations and activated extra highway patrol officers.

Fallin also spoke Monday with President Barack Obama, who declared a major disaster and ordered federal aid to supplement state and local recovery efforts.

In video of the storm, the dark funnel cloud could be seen marching slowly across the green landscape. As it churned through the community, the twister scattered shards of wood, awnings and glass all over the streets.

The tornado also destroyed the community hospital and some retail stores. Moore Mayor Glenn Lewis watched it pass through from his jewelry shop.

"All of my employees were in the vault," Lewis said.

Chris Calvert saw the menacing cloud approaching from about a mile away.

"I was close enough to hear it," he said. "It was just a low roar, and you could see the debris, like pieces of shingles and insulation and stuff like that, rotating around it."

Even though his subdivision is a mile from the tornado's path, it was still covered with debris. He found a picture of a small girl on Santa Claus' lap in his yard.

A map provided by the National Weather Service showed that the storm began west of Newcastle and crossed the Canadian River into Oklahoma City's rural far southwestern side about 3 p.m. When it reached Moore, the twister cut a path through the center of town before lifting back into the sky at Lake Stanley Draper.

The National Weather Service issued an initial finding that the tornado was an EF-4 on the enhanced Fujita scale, the second most-powerful type of twister.

Monday's powerful tornado loosely followed the path of a killer twister that slammed the region in May 1999.

The weather service estimated that Monday's tornado was at least a half-mile wide. The 1999 storm had winds clocked at 300 mph.

Kelsey Angle, a weather service meteorologist in Kansas City, Mo., said it's unusual for two such powerful tornadoes to track roughly the same path.

It was the fourth tornado to hit Moore since 1998. A twister also struck in 2003.

Lewis, who was also mayor during the 1999 storm, said the city was already at work on the recovery.

"We've already started printing the street signs. It took 61 days to clean up after the 1999 tornado. We had a lot of help then. We've got a lot of help now."

Monday's devastation in Oklahoma came almost exactly two years after an enormous twister ripped through the city of Joplin, Mo., killing 158 people and injuring hundreds more.

That May 22, 2011, tornado was the deadliest in the United States since modern tornado record keeping began in 1950, according to the National Oceanic and Atmospheric Administration. Before Joplin, the deadliest modern tornado was June 1953 in Flint, Mich., when 116 people died.

___

Associated Press writers Sean Murphy and Sue Ogrocki contributed to this report.

Source: http://news.yahoo.com/crews-dig-night-deadly-okla-twister-085342421.html

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Do salamanders' immune systems hold the key to regeneration?

May 20, 2013 ? Salamanders' immune systems are key to their remarkable ability to regrow limbs, and could also underpin their ability to regenerate spinal cords, brain tissue and even parts of their hearts, scientists have found.

In research published today in the Proceedings of the National Academy of Sciences researchers from the Australian Regenerative Medicine Institute (ARMI) at Monash University found that when immune cells known as macrophages were systemically removed, salamanders lost their ability to regenerate a limb and instead formed scar tissue.

Lead researcher, Dr James Godwin, a Fellow in the laboratory of ARMI Director Professor Nadia Rosenthal, said the findings brought researchers a step closer to understanding what conditions were needed for regeneration.

"Previously, we thought that macrophages were negative for regeneration, and this research shows that that's not the case -- if the macrophages are not present in the early phases of healing, regeneration does not occur," Dr Godwin said.

"Now, we need to find out exactly how these macrophages are contributing to regeneration. Down the road, this could lead to therapies that tweak the human immune system down a more regenerative pathway."

Salamanders deal with injury in a remarkable way. The end result is the complete functional restoration of any tissue, on any part of the body including organs. The regenerated tissue is scar free and almost perfectly replicates the injury site before damage occurred.

"We can look to salamanders as a template of what perfect regeneration looks like," Dr Godwin said.

Aside from "holy grail" applications, such as healing spinal cord and brain injuries, Dr Godwin believes that studying the healing processes of salamanders could lead to new treatments for a number of common conditions, such as heart and liver diseases, which are linked to fibrosis or scarring. Promotion of scar-free healing would also dramatically improve patients' recovery following surgery.

There are indications that there is the capacity for regeneration in a range of animal species, but it has, in most cases been turned off by evolution.

"Some of these regenerative pathways may still be open to us. We may be able to turn up the volume on some of these processes," Dr Godwin said.

"We need to know exactly what salamanders do and how they do it well, so we can reverse-engineer that into human therapies."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_environment/~3/7gjc3g_i9g4/130520163727.htm

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