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BEIJING, May 10 (Xinhuanet) -- Professional social networking site LinkedIn is aiming for a valuation of 3.3 billion U.S. dollars for its initial public offering, media reports said Tuesday.The Mountain View, California-based company is expected to begin trading on the New York Stock Exchange within the next month and will use the symbol "LNKD."It plans to offer 7.84 million shares priced at 32 dollars to 35 dollars each, according to the filing, which it submitted to the Securities and Exchange Commission.LinkedIn, which has more than 100 million members in over 200 countries and territories, is seeking to raise as much as 274.4 million dollars from the initial public offering (IPO) with 146.6 million dollars going to the company itself.In 2010, LinkedIn made 15 million dollars in profit on 243 million dollars in revenue, according to the filing.LinkedIn's biggest shareholder is its founder and chairman, Reid Hoffman, who owns more than 21 percent of the company.

WELLINGTON, May 13 (Xinhua) -- While it's long been known that a little sunshine can spread happiness, researchers in New Zealand have found that it can also save the lives of pneumonia patients.Medical scientists have found that vitamin D, which is absorbed through the skin and produced with exposure to sunlight, is a major factor in the survival rate of pneumonia patients.Researchers at Waikato University collaborated with doctors at Waikato Hospital, both Hamilton-based institutions, to study blood samples of 112 patients admitted to the hospital with pneumonia during the winter.They found that those with severe vitamin D deficiency 17 of the patients were more likely to die within a month, compared with patients with normal or slightly low vitamin D levels.Dr Bob Hancox, of the hospital's department of respiratory medicine, said five of the 17 died, a 29-percent mortality rate, compared with four deaths among the 95 patients with higher vitamin D levels, a 4-percent mortality rate."The analysis confirmed that the difference in mortality rates between the two groups was very unlikely to be due to chance," Hancox told Xinhua.Vitamin D deficiency was a concern around the world, Hancox said."Sunlight is the main source of vitamin D, so it tends to be a winter problem in temperate climates when people spend a lot of time indoors. But it occurs in all countries and vitamin D deficiency is believed to be a major problem worldwide."There is accumulating evidence that we need vitamin D to help fight infections, such as pneumonia as we have shown, as well as improve bone health," he told Xinhua."What is not yet clear is whether we can do anything about it. We don't know whether treating people with vitamin D supplements would help to prevent or treat respiratory infections. This is what we need to find out now."Dr Ray Cursons, of the Biological Sciences department at Waikato University, said patient age, sex, additional health conditions, and other prognostic factors did not affect the research outcome, although researchers still could not establish a causal link between vitamin D deficiency and mortality in the patients.Waikato Hospital D respiratory specialist Dr Noel Karalus said it was not yet known whether giving patients vitamin D supplements after their admission to hospital with respiratory tract infections would alter outcomes."It may transpire that vitamin D helps us avoid infection rather than cure it once established."Cursons said the best source of vitamin D was sunlight as dietary sources such as fatty fish and cod liver oil did not contain enough vitamin D."There is still some controversy regarding the optimal daily allowance of vitamin D. How much we absorb through the skin depends on sun exposure, skin type and geographical latitude. M ori and Pacific Islanders absorb less because of their darker skin, and people in colder climates also have lower levels of vitamin D. "Pneumonia is the single largest cause of death in children worldwide, killing an estimated 1.6 million children under the age of five each year, according to the World Health Organization.The research findings are published in the journal Respirology, published by the Asian Pacific Society of Respirology, this month.

BEIJING, Apirl 1 (Xinhuanet) -- An Ariane rocket launch of two communications satellites was aborted Wednesday after a technical hitch at the scheduled moment of liftoff in French Guiana on Wednesday.According to Arianespace, the Ariane 5 rocket's Vulcain main engine ignited as scheduled at 5:45 pm EDT (21:45 GMT), but the checkout process during ignition detected an unspecified anomaly, shutting down the engine before the two solid-rocket boosters ignited.The 165-foot (50-meter) tall Ariane 5 rocket's main engine's checkout process "was not completed successfully, preventing the boosters' ignition and thereby aborting the mission," Arianespace officials said. "The Ariane 5 and its two payloads remain in a safe mode on the launch pad."The Ariane 5 rocket uses a Vulcain 2 first stage engine assisted by two solid rocket boosters to launch satellite payloads into orbit. The Vulcain 2 engine is fueled by cryogenic liquid hydrogen and liquid oxygen and is designed to burn for about 600 seconds to boost payloads into space.Jean-Yves Le Gall, Arianespace president, said it would return the rocket to the final assembly building to prepare it for another launch attempt while investigating the cause of the problem. No new launch date was immediately announced.The Ariane 5 was to launch the Yahsat Y1A and Intelsat New Dawn communications satellites.

BEIJING, March 29 (Xinhuanet) -- Tickets for Apple's annual World Wide Developer Conference (WWDC) 2011 have already been sold out ten hours after the event was announced Monday, according to media reports.It is the first time the event sold out the same day it was announced. Last year, the conference sold out in eight days.WWDC 2011, with the tickets priced at 1599 U.S. dollars, will run from June 6 till June 10 at the Moscone West conference center in San Francisco.This year's speedy turnaround is probably because of a rumored double-focus on iOS and Mac OS."At this year's conference we are going to unveil the future of iOS and Mac OS," Philip Schiller, Apple's senior vice president of Worldwide Product Marketing, said in a press release."If you are an iOS or Mac OS X software developer, this is the event that you do not want to miss."The event will feature more than 100 technical sessions presented by Apple engineers on Application Frameworks; Graphics, Media and Games; Developer Tools; Internet and Web, and Core OS.

LOS ANGELES, April 20 (Xinhua) -- Hundreds of homes were evacuated on Wednesday in Monument, U.S. state of Colorado after hydrochloric acid was leaking from a train car, authorities said.The leak was first reported around 1 a.m. local time when a southbound train spotted a vapor trail on a northbound train, the Denver Post reported.Authorities first ordered the evacuation of some 255 homes, and later expanded the evacuation to an additional 160 homes, according to the report.Schools in the area were closed due to the leaking, the report said.A specialized crew from Texas has been dispatched to the scene to transfer the hydrochloric acid leaking from the train car and is expected to finish the job in four or five hours, weather permitting, the report quoted Sgt. Mike Schaller of the El Paso County Sheriff's Office as saying.The leak is contained but hydrochloric acid is still leaking slowly from the tanker, which holds 25,000-30,000 gallons, Schaller said.He said police went door-to-door notifying residents of a subdivision adjacent to the railroad tracks to evacuate as a precaution.No injuries have been reported, he said, but residents have been warned that they may have to be out of their homes until Friday as hazardous material crews offload the acid to another container.The northbound train originated in Kansas and was en route to Denver at the time, the Denver Post said.It's not yet known how much hydrochloric acid leaked from the train car.Once the leak is sealed, crews will remove the hydrochloric acid from the damaged car to a new car that will likely continue into Denver, according to the report.Monument is a town of 3,230 residents 88 kilometers south of Denver.

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