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SAN FRANCISCO, May 25 (Xinhua) -- Micro-blogging service Twitter on Wednesday confirmed that it has bought TweetDeck, a London-based startup that develops application to help people organize information posted on Twitter."Today, we're pleased to announce that the TweetDeck team has joined Twitter," Dick Costolo, Twitter's chief executive officer (CEO), said in a blog post."This acquisition is an important step forward for us. TweetDeck provides brands, publishers, marketers and others with a powerful platform to track all the real-time conversations they care about," he added.Founded in 2008, TweetDeck now has a team of 15 and offers a real-time application that allows users to monitor abundance of information from social media services including Twitter in a single concise view."Change may well be inevitable, but we remain the same team, staying in London, with the same focus and products, and now with the support and resources to allow us to grow and take on even bigger challenges," Iain Dodsworth, founder and CEO of TweetDeck, noted in a separate blog post.The deal is a defensive move for Twitter aimed at preventing TweetDeck from being purchased by rivals, some analysts said.Financial terms of the transaction were not disclosed, but technology blog site TechCrunch and other U.S. media reported that Twitter paid 40 million to 50 million U.S. dollars.

SAN FRANCISCO, March 29 (Xinhua) -- Computer networking equipment giant Cisco Systems Inc. on Tuesday announced the intent to buy privately-held software company newScale Inc., in a move to complement and expand its offerings in cloud computing.Based in San Mateo in the U.S. state of California, newScale provides software that delivers a service catalog and self-service portal for information technology (IT) organizations to select and quickly deploy cloud services within their businesses.Founded in 1999, the company now has more than two million users worldwide, including 20 percent of the Fortune 50 companies, according to information posted on newScale's website."With the acquisition of newScale, Cisco will be able to accelerate the deployment of cloud services through a service catalog and self-service portal that allows customers to easily manage their IT infrastructures," Parvesh Sethi, Cisco's senior vice president, noted in a statement.Cisco said it expects to close the deal in the second half of its fiscal year 2011, without disclosing financial terms.

WASHINGTON, May 27 (Xinhua) -- Two U.S. astronauts conducted the fourth and final scheduled spacewalks for space shuttle Endeavour 's STS-134 mission on Friday morning, the U.S. National Aeronautics and Space Administration (NASA) announced.The seven-hour, 24-minute spacewalk completed by Mike Fincke and Greg Chamitoff at 7:39 a.m. EDT (1139 GMT) was the final spacewalk conducted by space shuttle astronauts before NASA turns over Endeavour and sister ships Discovery and Atlantis to museums. Space station crew will continue to make spacewalks for maintenance and repair tasks.At 5:02 a.m. (0902 GMT), Fincke and Chamitoff surpassed the 1, 000th hour astronauts and cosmonauts have spent spacewalking in support of space station assembly and maintenance. The milestone occurred four hours and 47 minutes into the spacewalk, the 159th in support of station assembly and maintenance, totaling 1,002 hours, 37 minutes.The astronauts completed their mission to stow the 50-foot-long boom on the station truss and work on some new installations to extend the space station's robotic arm. After that, shuttle commander Mark Kelly called Mission Control in Houston to mark the milestone -- after 12 years of efforts."Space station assembly is complete," Kelly said.It was the 248th spacewalk U.S. astronauts have conducted and the 118th from space station airlocks. Landing is scheduled for 2: 32 a.m. EDT (0632 GMT) on Wednesday at the Kennedy Space Center in Florida. Shuttle Atlantis is targeted to launch on July 8 for space shuttle's final flight.Endeavour lifted off on May 16 from the Kennedy Space Center in Florida, to deliver to the International Space Station a 2-billion- dollar, multinational particle detector known as the Alpha Magnetic Spectrometer (AMS).AMS, a particle physics detector, is designed to search for various types of unusual matter by measuring cosmic rays. Its experiments are designed to help researchers study the formation of the universe and search for evidence of dark matter, strange matter and antimatter.NASA's 30-year-old shuttle program is ending due to high operating costs. The Obama administration wants to spur private companies to get into the space taxi business, freeing NASA to focus on deep space exploration and new technology development.When the U.S. space shuttle program officially ends later this year, the Russian space program's Soyuz capsule will be the only method for transporting astronauts to and from the station.

BEIJING, Jan. 30 (Xinhua) -- Chinese President Hu Jintao said Sunday more attention should be paid to raising people's living standards while striving for economic growth.Hu made the remarks at a symposium with non-Communist parties and individuals to mark the Spring Festival, or the Lunar New Year, which falls on Feb. 3 this year.Hu urged the parties and social groups to pursue the people-first principle and help the government to better serve the people."We should always make the improvement of people's lives an important starting point in promoting development in a scientific way and enhancing social harmony," Hu said.Chinese President Hu Jintao (C), also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, delivers an important speech at a symposium with non-Communist parties and individuals to mark the Spring Festival in Beijing, capital of China, Jan. 30, 2011.He said the government would focus on the transformation of its economic development pattern, and try to achieve its economic targets this year, which is also the start of the 12th five-year period (2011-2015).Hu hoped the non-Communist parties and individuals would concentrate on promoting scientific development and put forward practical suggestions for achieving comprehensive, coordinated and sustainable development.This year marks the 90th anniversary of the founding of the Communist Party of China (CPC).Hu said the past 90 years had proved that unison of ideas, targets and actions in the multi-party cooperation system under CPC leadership guaranteed the country to achieve progress in revolution, development and reform.Hu expressed appreciation for the contributions of non-Communist parties and individuals to social and economic development last year."We must rely on all Chinese people, including non-Communist parties, societies, ethnic groups and people from all walks of life and in different strata to achieve this year's goals for economic and social development," said Hu.At the event, Hu also extended New Year's greetings and best wishes to all people from the non-Communist parties and the All-China Federation of Industry and Commerce and those without party affiliations.Non-Communist party leaders at the gathering gave opinions on issues such as multi-party cooperation, rural social security system, water conservation, strategic emerging industries, education and cultural exchanges across the Taiwan Straits.The meeting was chaired by Jia Qinglin, chairman of the National Committee of the Chinese People's Political Consultative Conference. Vice President Xi Jinping and Vice Premier Li Keqiang were present at the gathering.

WASHINGTON, May 11 (Xinhua) -- Johns Hopkins University researchers have demonstrated that human liver cells derived from adult cells coaxed into an embryonic state can engraft and begin regenerating liver tissue in mice with chronic liver damage.The work, published Wednesday in the journal Science Translational Medicine, suggests that liver cells derived from so- called "induced-pluripotent stem cells (iPSCs)" could one day be used as an alternative to liver transplant in patients with serious liver diseases, bypassing long waiting lists for organs and concerns about immune system rejection of donated tissue."Our findings provide a foundation for producing functional liver cells for patients who suffer liver diseases and are in need of transplantation," says Yoon-Young Jang, assistant professor of oncology at the Johns Hopkins Kimmel Cancer Center. "iPSC-derived liver cells not only can be generated in large amounts, but also can be tailored to each patient, preventing immune-rejection problems associated with liver transplants from unmatched donors or embryonic stem cells." A microsopic view shows human embryonic stem cells in various stages of differentiation into liver cells in this photo taken at Stanford University and released by the California Institute for Regenerative Medicine, March 9, 2009iPSCs are made from adult cells that have been genetically reprogrammed to revert to an embryonic stem cell-like state, with the ability to transform into different cell types. Human iPSCs can be generated from various tissues, including skin, blood and liver cells.Although the liver can regenerate in the body, end-stage liver failure caused by diseases like cirrhosis and cancers eventually destroy the liver's regenerative ability, Jang says. Currently, the only option for those patients is to receive a liver organ or liver cell transplant, a supply problem given the severe shortage of donor liver tissue for transplantation. In addition, mature liver cells and adult liver stem cells are difficult to isolate or grow in the laboratory, she says. By contrast, iPSCs can be made from a tiny amount of many kinds of tissue; and the embryonic stem- like iPSCs can grow in laboratory cultures indefinitely.For the study, Jang and colleagues generated human iPSCs from a variety of adult human cells, including liver cells, fibroblasts ( connective tissue cells), bone marrow stem cells and skin cells. They found that though the iPSCs overall were molecularly similar to each other and to embryonic stem cells, they retained a distinct molecular "signature" inherited from the cell of origin.

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