jimmy kimmel amzn white house correspondents dinner phoenix coyotes bruce irvin charlie st cloud celtics
Wednesday, July 11, 2012
A Simple Explanation of How All Mass in the Universe Is Allowed to Exist [Video]
How the U.S. Accidentally Nuked Its Own Communications Satellite
News |
Space
Fifty years ago AT&T launched Telstar 1, the first commercial communications satellite?right into the middle of a radiation storm produced by a nuclear test
?| July 11, 2012?|
In 1962 a small spherical satellite weighing about 77 kilograms was launched from Cape Canaveral. ?Its name was Telstar 1, and it was the first commercial telecommunications satellite?the first of a long line that have led to today's digitally connected world, where television programs and other media are easily accessible at locations across the globe.
By the following February, however, Telstar 1 had been completely fried by energetic electrons from a U.S. high-altitude nuclear test.
Walter Brown, a Bell Laboratories engineer who worked on the project, recalls Telstar 1?s triumphs and untimely demise. Currently a professor of materials science and engineering at Lehigh University in Pennsylvania, he says it was his job to ?examine how radiation in space affects solar cells and semiconductors.? He got rather more than he bargained for.
The day before launch, the U.S. had set off a nuclear explosion at an altitude of 400 kilometers just southwest of Johnston Island in the Pacific Ocean. The test, known as Starfish Prime, released the energy equivalent of 1.4 megatons (million tons) of TNT?creating a huge electromagnetic pulse that produced spectacular aurora over the Pacific.
"The people who set off the nuclear explosion were totally surprised by the huge number of high energy electrons that were released," Brown says. "They had no idea this would be the case until we started seeing this huge flux, a hundred times what was predicted."
The satellite unwittingly became an experiment to analyze the aftermath of a nuclear blast on electronic equipment. "We learned a lot about radiation damage from Telstar 1," he says. "Initially, Telstar 1 couldn't be turned on, some transistors had failed. But the electronics engineers figured a way around that and got it working."
Their efforts bought enough time for the satellite to prove its worth. On July 11, 1962, a day after launch, Telstar 1 relayed the television transmission of an American flag, located outside a base station in Andover, Maine, to a station in Pleumeur-Bodou, France. Brown remembers what happened at the Andover station when the satellite was turned on and radio transmission commenced: ?The project leader Eugene O?Neill whooped and gave thumbs up. And soon everyone was whooping and giving thumbs-up."
On July 23, 1962, Telstar 1 relayed a public broadcast featuring Walter Cronkite, a baseball game, and segments of a news conference by President Kennedy. That evening, it transmitted the first non-cable phone call across the Atlantic.*
Telstar 1 vindicated the vision of John Robinson Pierce, a famous Bell Labs engineer who had calculated that 25 satellites placed in suitable orbits around the Earth could provide continuous communication between any two points on the globe by bouncing signals. The first test of his idea had been the Echo 1 satellite, a giant 30-meter-diameter balloon coated with a metallized film, which NASA launched in 1960. Known as a passive communications satellite because it carried no electronics but rather acted as a giant signal reflector, it was used by Bell Labs engineers to successfully bounce telephone, radio and television signals off it. Telstar 1 went a step further. It had its own power source--solar cells that generated approximately 14 watts of power, and a transponder to receive and retransmit television signals or telephone calls.
Its success against the odds inspired a generation of scientists and engineers. Louis Lanzerotti, a physicist at New Jersey Institute of Technology who spent many years at Bell Labs and worked on space missions such as Voyager, Ulysses and Galileo, was a graduate student in nuclear physics at Harvard University when Telstar 1 went into orbit. "The graduate students in the cyclotron lab talked about it," he recalls. "We talked about sending signals across the Atlantic."
Source: http://rss.sciam.com/click.phdo?i=f3d259f9c8d0b52ab88865fc01dc336d
rich ross april 20 jennifer love hewitt secret service prostitution 4 20 george zimmerman sheree whitfield
execSearches Job Posting: Vice President Of East Coast ...
Sorry, Readability was unable to parse this page for content.
Source: http://www.execsearches.com/non-profit-jobs/jobDetail.asp?job_id=24353
mumia abu jamal pearl harbor blagojevich sentence mythbusters cannonball uss arizona myth busters tracy mcgrady
Tuesday, July 10, 2012
China's Inflation Eases
BEIJING?China's consumer inflation slowed sharply to the lowest level in nearly two-and-a-half years in June, likely one key reason why the central bank was comfortable with cutting benchmark interest rates for the second time in less than a month last week.
Economists said the slower inflation is opening doors for a further loosening of monetary policy and more investments by the government in the second half to ensure the country's economy rebounds.
Other data due later this week will give a clearer picture of the extent of the slowdown in the world's second-largest economy. Trade data are due Tuesday, while ...
BEIJING?China's consumer inflation slowed sharply to the lowest level in nearly two-and-a-half years in June, likely one key reason why the central bank was comfortable with cutting benchmark interest rates for the second time in less than a month last week.
Economists said the slower inflation is opening doors for a further loosening of monetary policy and more investments by the government in the second half to ensure the country's economy rebounds.
Other data due later this week will give a clearer picture of the extent of the slowdown in the world's second-largest economy. Trade data are due Tuesday, while ...
Source: http://online.wsj.com/article/SB10001424052702303567704577515581940693956.html?mod=rss_about_china
jeremy lin espn sassafras mardi gras 2012 the secret world of arrietty cee lo allen iverson jr smith
New England Video Association (NPVA) Presents Wedding Filmmaking Crash Course with Ray Roman
?
July 9, 2012 -- If you are or aspiring to be a wedding filmmaker and you live anywhere near Massachusetts, don't miss this opportunity to attend this one-day crash course with Ray Roman of Ray Roman Films.?? On July 16th, 2012 from 9am - 6pm Ray Roman will be giving a hands-on wedding cinema workshop at the Holiday Inn in Dedham, MA.
The workshop will cover:
- Creative Shooting Techniques
- Ceremony and Reception Coverage
- Proper Lighting
- Composition
- Audio Setups
- DSLR Workflow
This full day workshop is just $395 for NPVA members and $495 for non-members. The workshop can be payed for via PayPal to ray@rayroman.com. ? Limited seating. ? NPVA membership for the rest of 2012 is $115, making this a great opportunity to join and save.
About Ray Roman
Ray Roman is considered one of the top 10 wedding and event cinematographers in the world. Ray and his team routinely travel all over the globe documenting weddings for high profile clients.? Winners of countless International awards, Ray Roman has also won the top award in the world for short-form wedding film for 2 consecutive years (2010 & 2011). Ray and his team were? named one of the top 25 hottest and most influential studios on the planet by EventDV Magazine.
About NPVA
The National Professional Videographers? Association of New England, known as the NPVA/NE, is an organization comprised of independent video professionals.
Most of the members are involved in the various aspects of video production while some members are representatives of companies which support the industry.
Since its establishment in 1986, the NPVA/NE has dedicated itself to the pursuit of excellence in video production. This is achieved by conducting monthly meetings, which serve to inform the members of new technological advancements and showcase members? artistic works.
?
?
Source: http://www.cameratown.com/news/news.cfm/hurl/id%7C10707
norovirus beyonce and jay z baby droid 4 ann coulter tom brady sister dad shoots daughters laptop brandon jennings
Deadly violence rages across Afghanistan
Afghan children stand near the wreckage of a vehicle after an explosion in Kandahar, south of Kabul, Afghanistan, Monday, July 9, 2012. Three suicide bombers riding a three-wheeled vehicle blew themselves up Monday afternoon in Kandahar city, killing two children and wounding several other civilians, said Kandahar provincial spokesman Ahmad Jawed Faisal. He said authorities had not determined the target of the explosion. (AP Photo/Allauddin Khan)
Afghan children stand near the wreckage of a vehicle after an explosion in Kandahar, south of Kabul, Afghanistan, Monday, July 9, 2012. Three suicide bombers riding a three-wheeled vehicle blew themselves up Monday afternoon in Kandahar city, killing two children and wounding several other civilians, said Kandahar provincial spokesman Ahmad Jawed Faisal. He said authorities had not determined the target of the explosion. (AP Photo/Allauddin Khan)
An Afghan security man aims his weapon towards Taliban militants, not pictured, during a gun battle in Kandahar, south of Kabul, Afghanistan, Monday, July 9, 2012. Three suicide bombers riding in a three-wheeled vehicle blew themselves up Monday afternoon in Kandahar city, killing two children and wounding several other civilians, said Kandahar provincial spokesman Ahmad Jawed Faisal. A short time later, three more suicide bombers tried to attack the police headquarters in Kandahar, but were gunned down by police before they could get into the compound, Faisal said. (AP Photo/Allauddin Khan)
Afghans stand near human remains at the scene after an explosion in Kandahar, south of Kabul, Afghanistan, Monday, July 9, 2012. Three suicide bombers riding in a three-wheeled vehicle blew themselves up Monday afternoon in Kandahar city, killing two children and wounding several other civilians, said Kandahar provincial spokesman Ahmad Jawed Faisal. He said authorities had not determined the target of the explosion. (AP Photo/Allauddin Khan)
Afghan President Hamid Karzai, left, shakes hands with Japanese Prime Minister Yoshihiko Noda prior to their talks at Noda's office in Tokyo Monday, July 9, 2012. Karzai said Monday he is encouraged by pledges to provide Afghanistan with $16 billion in aid, but warned that corruption in his country cannot be rooted out unless donors themselves take more action. (AP Photo/Yoshikazu Tsuno, Pool)
Afghan President Hamid Karzai, left, is greeted by Japanese Prime Minister Yoshihiko Noda for their talks at Noda's office in Tokyo Monday, July 9, 2012. Karzai said Monday he is encouraged by pledges to provide Afghanistan with $16 billion in aid, but warned that corruption in his country cannot be rooted out unless donors themselves take more action. (AP Photo/Yoshikazu Tsuno, Pool)
KABUL, Afghanistan (AP) ? An insurgent bomb killed six American soldiers in eastern Afghanistan, part of a surge of violence that has dealt a stark reminder that war is still raging as NATO plots an exit strategy for the end of 2014.
Violence raged across the country Monday, including grisly attacks by multiple suicide bombers, a day after donor nations meeting in Tokyo to pledge $16 billion in aid.
President Hamid Karzai and his top ministers said the pledges exceeded their expectations and sent a strong signal that the international community will not abandon Afghanistan even though foreign troops have started to leave.
It also sent a message to Karzai's adversaries in the Taliban and elsewhere, who are hoping his support will weaken once the foreign combat troops leave or move into support roles in 2 1/2 years.
Sunday was a particularly deadly day in Afghanistan. Roadside bombs and militant attacks killed seven American soldiers, 19 Afghan civilians and seven Afghan policemen.
Violence erupted again on Monday as militants launched suicide attacks on two police headquarters and carried out other assaults that left 20 people dead ? three policemen, an Afghan prosecutor, two children and 14 attackers, according to officials. At least 60 other people were wounded.
German Brig. Gen. Gunter Katz, a spokesman for the U.S.-led coalition, said the six Americans were killed Sunday when their armored vehicle struck a bomb in eastern Afghanistan. He said a seventh American soldier was killed in a separate insurgent attack Sunday in the south.
Taliban spokesman Zabiullah Mujahid claimed responsibility for that attack in Wardak province, just south of Kabul. Coalition and Afghan forces are trying to secure areas of Wardak that insurgents use as gateway into the Afghan capital, where they have staged high-profile attacks on Afghan government and NATO targets.
Monday's violence began when gunmen assassinated a chief prosecutor in eastern Ghazni province as he drove to work. Mohammad Ali Ahmadi, the deputy provincial governor, said Sahar Gul was shot twice.
Later in the day, three suicide bombers riding in a three-wheeled vehicle blew themselves up in Kandahar city, said Kandahar provincial spokesman Ahmad Jawed Faisal.
Then nearly a dozen other suicide attackers tried to storm the police headquarters in Kandahar, but they failed to enter the compound, Faisal said. The incident was still being investigated, but Faisal said authorities suspect that the three attackers in the vehicle, a form of miniature pickup known as a Zaranj, were headed toward police headquarters when their explosives detonated prematurely.
Three policemen and two children were killed in the attack. Another 18 police and 12 civilians were wounded.
"I'm not happy to sit here and announce such bad news, but we are facing an enemy that doesn't have a heart, so we have to be strong," Kandahar provincial Gov. Tooryalai Wesa told reporters at a news conference. "They don't care about the innocent people. They just want to scare the people."
A total of 14 suicide attackers, who fired at police for about two hours from several directions, blew themselves up or were shot and killed by police, Kandahar officials said.
Militants also attacked a police headquarters building in Shibirghan, the capital of Jawzjan province in the relatively peaceful north.
Provincial governor Mohammad Aleem Saaie said a suicide bomber on a bicycle blew himself up near the headquarters. No one died, but he said 26 people were wounded, including two policemen, a doctor and a prosecutor.
"This was another attack against innocent civilians," said Gen. Abdul Aziz Ghairat, the provincial police chief. "The majority of the wounded people are civilians."
Attackers have picked up the pace during the summer months, planting improvised explosive devices, or IEDs, along roads or footpaths. But during the past year, U.S. troops found and avoided more homemade bombs than a year ago because of improvements in training, equipment and intelligence, the U.S. military said.
In the first three months of this year, 5 percent of the bombs planted across Afghanistan hit their mark, according to the Pentagon's Joint IED Defeat Organization. That's down from 10 to 12 percent over the same three-month period a year ago.
So far this year, 231 U.S. and other NATO forces have been killed in Afghanistan. That compares with 271 in the first six months of last year.
___
Associated Press writers Amir Shah and Rahim Faiez in Kabul and Mirwais Khan in Kandahar contributed to this report.
Associated Pressgreen bay packers stock jeff garcia jeff garcia big east jesse james pearl harbor day discovery channel
Hollande to stand by ban on Armenian genocide denial
[ [ [['Connery is an experienced stuntman', 2]], 'http://yhoo.it/KeQd0p', '[Slideshow: See photos taken on the way down]', ' ', '630', ' ', ' ', ], [ [['Connery is an experienced stuntman', 7]], ' http://yhoo.it/KpUoHO', '[Slideshow: Death-defying daredevils]', ' ', '630', ' ', ' ', ], [ [['know that we have confidence in', 3]], 'http://yhoo.it/LqYjAX ', '[Related: The Secret Service guide to Cartagena]', ' ', '630', ' ', ' ', ], [ [['We picked up this other dog and', 5]], 'http://yhoo.it/JUSxvi', '[Related: 8 common dog fears, how to calm them]', ' ', '630', ' ', ' ', ], [ [['accused of running a fake hepatitis B', 5]], 'http://bit.ly/JnoJYN', '[Related: Did WH share raid details with filmmakers?]', ' ', '630', ' ', ' ', ], [ [['accused of running a fake hepatitis B', 3]], 'http://bit.ly/KoKiqJ', '[Factbox: AQAP, al-Qaeda in Yemen]', ' ', '630', ' ', ' ', ], [ [['have my contacts on or glasses', 3]], 'http://abcn.ws/KTE5AZ', '[Related: Should the murder charge be dropped?]', ' ', '630', ' ', ' ', ], [ [['have made this nation great as Sarah Palin', 5]], 'http://yhoo.it/JD7nlD', '[Related: Bristol Palin reality show debuts June 19]', ' ', '630', ' ', ' ', ], [ [['have made this nation great as Sarah Palin', 1]], 'http://bit.ly/JRPFRO', '[Related: McCain adviser who vetted Palin weighs in on VP race]', ' ', '630', ' ', ' ', ], [ [['A JetBlue flight from New York to Las Vegas', 3]], 'http://yhoo.it/GV9zpj', '[Related: View photos of the JetBlue plane in Amarillo]', ' ', '630', ' ', ' ', ], [ [['the 28-year-old neighborhood watchman who shot and killed', 15]], 'http://news.yahoo.com/photos/white-house-stays-out-of-teen-s-killing-slideshow/', 'Click image to see more photos', 'http://l.yimg.com/cv/ip/ap/default/120411/martinzimmermen.jpg', '630', ' ', 'AP', ], [ [['He was in shock and still strapped to his seat', 6]], 'http://news.yahoo.com/photos/navy-jet-crashes-in-virginia-slideshow/', 'Click image to see more photos', 'http://l.yimg.com/cv/ip/ap/default/120406/jet_ap.jpg', '630', ' ', 'AP', ], [ [['xxxxxxxxxxxx', 11]], 'http://news.yahoo.com/photos/russian-grannies-win-bid-to-sing-at-eurovision-1331223625-slideshow/', 'Click image to see more photos', 'http://l.yimg.com/a/p/us/news/editorial/1/56/156d92f2760dcd3e75bcd649a8b85fcf.jpeg', '500', ' ', 'AP', ] ]
[ [ [['did not go as far his colleague', 8]], '29438204', '0' ], [ [[' the 28-year-old neighborhood watchman who shot and killed', 4]], '28924649', '0' ], [ [['because I know God protects me', 14], ['Brian Snow was at a nearby credit union', 5]], '28811216', '0' ], [ [['The state news agency RIA-Novosti quoted Rosaviatsiya', 6]], '28805461', '0' ], [ [['measure all but certain to fail in the face of bipartisan', 4]], '28771014', '0' ], [ [['matter what you do in this case', 5]], '28759848', '0' ], [ [['presume laws are constitutional', 7]], '28747556', '0' ], [ [['has destroyed 15 to 25 houses', 7]], '28744868', '0' ], [ [['short answer is yes', 7]], '28746030', '0' ], [ [['opportunity to tell the real story', 7]], '28731764', '0' ], [ [['entirely respectable way to put off the searing constitutional controversy', 7]], '28723797', '0' ], [ [['point of my campaign is that big ideas matter', 9]], '28712293', '0' ], [ [['As the standoff dragged into a second day', 7]], '28687424', '0' ], [ [['French police stepped up the search', 17]], '28667224', '0' ], [ [['Seeking to elevate his candidacy back to a general', 8]], '28660934', '0' ], [ [['The tragic story of Trayvon Martin', 4]], '28647343', '0' ], [ [['Karzai will get a chance soon to express', 8]], '28630306', '0' ], [ [['powerful storms stretching', 8]], '28493546', '0' ], [ [['basic norm that death is private', 6]], '28413590', '0' ], [ [['songwriter also saw a surge in sales for her debut album', 6]], '28413590', '1', 'Watch music videos from Whitney Houston ', 'on Yahoo! Music', 'http://music.yahoo.com' ], [ [['keyword', 99999999999999999999999]], 'videoID', '1', 'overwrite-pre-description', 'overwrite-link-string', 'overwrite-link-url' ] ]
Source: http://news.yahoo.com/hollande-stand-ban-armenian-genocide-denial-141115535--business.html
morris claiborne mothers day gifts clippers lisa lampanelli lisa lampanelli bronx zoo memphis grizzlies
Subscribe to:
Posts (Atom)