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LOS ANGELES, April 1 (Xinhua) -- A NASA Gulfstream-III aircraft equipped with a synthetic aperture radar is scheduled to depart Sunday, April 3 on a nine-day mission to image Hawaii volcanoes, the Jet Propulsion Laboratory (JPL) announced on Friday.The aircraft will fly from the Dryden Aircraft Operations Facility in Palmdale, California to the Big Island of Hawaii to study the Kilauea volcano that recently erupted, said JPL in Pasadena, Los Angeles.The mission will help scientists better understand processes occurring under Earth's surface, JPL said.Developed by JPL, the Uninhabited Aerial Vehicle Synthetic Aperture Radar, or UAVSAR, uses a technique called interferometric synthetic aperture radar that sends pulses of microwave energy from the aircraft to the ground to detect and measure very subtle deformations in Earth's surface, such as those caused by earthquakes, volcanoes, landslides and glacier movements.As the Gulfstream-III flies at an altitude of about 12,500 meters, the radar, located in a pod under the aircraft's belly, will collect data over Kilauea, according to JPL.The UAVSAR's first data acquisitions over this volcanic region took place in January 2010, when the radar flew over the volcano daily for a week. The UAVSAR detected deflation of Kilauea's caldera over one day, part of a series of deflation-inflation events observed at Kilauea as magma is pumped into the volcano's east rift zone.This month's flights will repeat the 2010 flight paths to an accuracy of within 5 meters, or about 16.5 feet, assisted by a Platform Precision Autopilot designed by engineers at NASA's Dryden Flight Research Center on Edwards Air Force Base, California, JPL said.By comparing these camera-like images, interferograms are formed that reveal changes in Earth's surface, said JPL.Between March 5 and 11, 2011, a spectacular fissure eruption occurred along the east rift zone. Satellite radar imagery captured the progression of this volcanic event."The April 2011 UAVSAR flights will capture the March 2011 fissure eruption surface displacements at high resolution and from multiple viewing directions, giving us an improved resolution of the magma injected into the east rift zone that caused the eruption," said JPL research scientist Paul Lundgren."Our goal is to be able to deploy the UAVSAR on short notice to better understand and aid in responding to hazards from Kilauea and other volcanoes in the Pacific region covered by this study," Lundgren added.

WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified a human lung stem cell that is self-renewing and capable of forming and integrating multiple biological structures of the lung. This research will be published Thursday in the New England Journal of Medicine."This research describes, for the first time, a true human lung stem cell. The discovery of this stem cell has the potential to offer those who suffer from chronic lung diseases a totally novel treatment option by regenerating or repairing damaged areas of the lung," said the study's corresponding author Piero Anversa, who is also director of the Center for Regenerative Medicine at the hospital.Using lung tissue from surgical samples, researchers identified and isolated the human lung stem cell and tested the functionality of the stem cell both in vitro and in vivo. Once the stem cell was isolated, researchers demonstrated in vitro that the cell was capable of dividing both into new stem cells and also into cells that would grow into various types of lung tissue. Next, researchers injected the stem cell into mice with damaged lungs. The injected stem cells differentiated into new bronchioles, alveoli and pulmonary vessel cells which not only formed new lung tissue, but also integrated structurally to the existing lung tissue in the mice.The researchers define this cell as truly "stem" because it fulfills the three categories necessary to fall under stem cell categorization: first, the cell renews itself; second, it forms into many different types of lung cells; and third, it is transmissible, meaning that after a mouse was injected with the stem cells and responded by generating new tissue, researchers were then able to isolate the stem cell in the treated mouse, and use that cell in a new mouse with the same results."These are the critical first steps in developing clinical treatments for those with lung disease for which no therapies exist. Further research is needed, but we are excited about the impact this discovery could have on our ability to regenerate or recreate new lung tissues to replace damaged areas of the lungs," said Joseph Loscalzo, chair of the Department of Medicine at BWH and co-author.

BEIJING, Feb. 24 (Xinhua) -- Graft remains one of the Chinese people's top concerns, as indicated by online polls from two mainstream media in China prior to the country's annual parliamentary and political advisory sessions.As of 9 p.m. on Thursday, over 54,000 Internet users voiced their concerns over "the fight against corruption and efforts to build a clean government" in an online survey launched by the Xinhua News Agency.Corruption came in at fourth place behind "curbing housing prices," "income distribution" and "control of commodity prices."The poll was launched by Xinhua and was meant to solicit public opinion ahead of the annual sessions of the National People's Congress (NPC) and the National Committee of the Chinese People's Political Consultative Conference (CPPCC).In a survey posted on People.com.cn, a website subsidiary of the People's Daily newspaper, "anti-graft" was among the most selected topics following "social security" and "judicial justice."Internet users pinned their hopes on the forthcoming parliamentary and political advisory sessions, which are scheduled to open in early March.They hope that their voices would be heard by the country's lawmakers and political advisors, who would represent them in the two sessions and would take all possible measures to tackle a number of social issues including the fight against corruption."I hope that the Central Committee of the Communist Party of China (CPC) combats graft comprehensively and severely to ensure a Party with a clean work style, a society with justice and assures the Chinese people that they would not be wronged," said an Internet user from Jiangxi province in a forum entitled "voicing my wishes to Premier Wen Jiabao at the 2011 two sessions " on xinhuanet.com.Internet users believe that the spread of corruption in some places had hindered China's economic development, undermined social stability and harmed the relationship between the people and officials.The fight against corruption, therefore, is a significant factor in determining whether or not China can reach its goals outlined in its Twelfth Five-year Program (2011-2015) on National Economic and Social Development, an Internet user wrote."Corruption has affected Chinese people's life through its spread into many social sectors. As the two sessions represent an open platform to reflect the people's will, citizens hope to push forward the cause of anti-corruption through legislation, thus addressing their common concerns." said Ren Jianmin, director of the Anti-corruption and Governance Research Center of Tsinghua University.The CPC has never relaxed its efforts to fight against corruption, experts say.Last year saw four ministerial-level Chinese officials placed under a graft probe or removed from their posts. Among these officials were Zhang Jiameng, former vice chairman of the Zhejiang Provincial People's Congress Standing Committee in southeast China, and Zhang Jingli, former deputy director of the State Food and Drug Administration.Another 11 ministerial-level officials were sentenced to life imprisonment or other severe punishments in 2010.On February 12 this year, Liu Zhijun, the Chinese Minister of Railways, was removed from his post as the Party chief of the ministry over an alleged "severe violation of discipline," becoming the latest senior official to be investigated in the country's battle against corruption.Experts believe that the downfall of high-ranking officials over corruption charges have clearly shown the determination of the CPC to enforce the Party's discipline, combat corruption and promote a clean work style.On January 10 this year, Chinese president Hu Jintao called for efforts to tackle prominent problems that have seriously harmed people's interests and sparked most public complaints during a plenary session of the CPC Central Commission for Discipline Inspection (CCDI), the Party's anti-graft body.He also pledged to combat graft and punish corrupt officials severely to win the trust of the people.Further, the CPC's drive to erase corruption yielded significant results last year.A total of 5,098 leaders at the county level or above have been punished and 804 officials were referred for prosecution last year, said Gan Yisheng, the deputy secretary of the CCDI, on January 6 this year.Despite the achievements accomplished by the CPC in its fight against corruption, Ren Jianmin believes that the anti-graft situation in China is grave and the task remain arduous.Problems concerning land acquisition and compensation, housing, food and drug safety, environmental protection, work place safety and equal access to education have been reported by the public.To handle these issues, CCDI secretary He Guoqiang urged officials on January 12 to "put people first" and "exercise the state's power for the people" when addressing problems that the public complains about.He, also a member of the Standing Committee of the CPC Central Committee Political Bureau, said that efforts should be enhanced to fight graft in fields that are most vulnerable to corruption and unhealthy practices."The two sessions have a special role to play in China's fight against corruption," said Li Chengyan, a professor at the School of Government in Peking University."Every year, the Party and the government will take effective measures after the two sessions, as a response to social concerns. The people and the media's focus on anti-graft work will push the government to solve relevant problems," he said.According to experts, however, what's more important is to put in place a sound system concerning anti-corruption, promote reform and ensure the implementation of existing measures.

BEIJING, Feb. 8 (Xinhua) -- Forty people died in more than 118,000 cases of fire reported across China from February 2 to February 8, as Chinese revelers celebrated the Lunar New Year holiday with fireworks, according to a statement released Tuesday by the country's Ministry of Public Security.The number of cases jumped from the 7,480 fires reported during last year's Spring Festival holiday, which caused losses worth 28.5 million yuan. The incidents also injured 37 people and caused more than 56 million yuan (8.5 million U.S. dollars) in damages, which is almost double the figure from last year.However, this year's losses did not include a case in northeastern Liaoning Province where a five-star hotel in the city of Shenyang was set ablaze by fireworks on February 3.The fire, which caused no casualties, is possibly the country's largest fireworks accident during this year's Spring Festival celebrations.According to the statement, some 260,000 police and fire fighters across the country were mobilized for 24,800 fire control missions.The personnel rescued more than 1,600 people and evacuated tens of thousands. Fire departments have been strengthening monitoring of high-rise buildings, shopping malls, markets, construction sites and other crowded or vulnerable locations.Also, a total of 173 companies were suspended from operating for failing to meet fire prevention and control standards, according to the ministry.

SAN FRANCISCO, May 4 (Xinhua) -- Intel Corp. on Wednesday announced that it will mass-manufacture chips using new transistors featuring a three-dimensional (3-D) structure, calling it a technical breakthrough in microprocessors.The 3-D transistor, called Tri-Gate, represents a fundamental departure from the two-dimensional planar transistor structure that has powered computers, mobile phones and other modern electronics, Intel said."Intel's scientists and engineers have once again reinvented the transistor, this time utilizing the third dimension," Paul Otellini, Intel's chief executive officer, said in a statement.Intel on Wednesday also demonstrated a 22-nanometer (nm) microprocessor, codenamed "Ivy Bridge," which will be the first high-volume chips to use the new 3-D transistors.Ivy Bridge is scheduled for high-volume production readiness by the end of this year, the company said.According to Intel, the 3-D transistors enable chips to operate at lower voltage with lower leakage compared to previous transistors, providing up to 37 percent performance increase at low voltage versus the company's 32nm planar transistors.The gain means that the new 3-D transistors are ideal for use in small handheld devices, which operate using less energy to " switch" back and forth, Intel noted.

来源：资阳报