成都中医治静脉血栓(成都鲜红斑痣做什么手术) (今日更新中)

WASHINGTON, Dec. 20 (Xinhua) -- NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system, the U.S. space agency announce Tuesday.The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exoplanets ever confirmed around a star like our sun, according to NASA.The discovery marks the next important milestone in the ultimate search for planets like Earth. The new planets are thought to be rocky. Kepler-20e is slightly smaller than Venus, measuring 0.87 times the radius of Earth. Kepler-20f is slightly larger than Earth, measuring 1.03 times its radius. Both planets reside in a five-planet system called Kepler-20, approximately 1, 000 light-years away in the constellation Lyra.Kepler-20e orbits its parent star every 6.1 days and Kepler-20f every 19.6 days. These short orbital periods mean very hot, inhospitable worlds. Kepler-20f, at 800 degrees Fahrenheit, is similar to an average day on the planet Mercury. The surface temperature of Kepler-20e, at more than 1,400 degrees Fahrenheit, would melt glass."The primary goal of the Kepler mission is to find Earth-sized planets in the habitable zone," said Francois Fressin of the Harvard-Smithsonian Center for Astrophysics, lead author of a new study published in the journal Nature. "This discovery demonstrates for the first time that Earth-size planets exist around other stars, and that we are able to detect them."The Kepler-20 system includes three other planets that are larger than Earth but smaller than Neptune. Kepler-20b, the closest planet, Kepler-20c, the third planet, and Kepler-20d, the fifth planet, orbit their star every 3.7, 10.9 and 77.6 days. All five planets have orbits lying roughly within Mercury's orbit in our solar system. The host star belongs to the same G-type class as our sun, although it is slightly smaller and cooler.

TEHRAN, Dec. 8 (Xinhua) -- Iranian inventors ranked first in the Seoul International Invention Fair (SIIF) in South Korea, the official IRNA news agency reported on Thursday.The three-member Iranian team from Tabriz city of Iran's northwestern East Azerbaijan province was ranked first by winning one gold and one silver medals in the fields of development and environment, said the report.South Korea, the United States and Chinese Taipei were selected as other three top teams after Iran.The Seoul International Invention Fair was held in the COEX Korea Exhibition Center from December 1 to 4, at which Some 700 participants from 32 countries and regions took part.

BEIJING, Jan. 27 (Xinhua) -- China is committed to helping African nations to improve their abilities for self-development, Chinese Vice Commerce Minister Gao Hucheng said on Friday.Gao, also International Trade Representative of the Ministry of Commerce, made the remarks in an article published by Xinhua ahead of top Chinese political advisor Jia Qinglin's visit to Africa. Jia, chairman of th

WASHINGTON, Dec. 21 (Xinhua) -- New research suggests that, in people who don't currently have memory problems, those with smaller regions of the brain's cortex may be more likely to develop symptoms consistent with very early Alzheimer's disease.The study was published Wednesday in the online issue of Neurology, the medical journal of the American Academy of Neurology.For the study, researchers used brain scans to measure the thickness of regions of the brain's cortex in 159 people free of dementia with an average age of 76. The brain regions were chosen based on prior studies showing that they shrink in patients with Alzheimer's dementia.Of the 159 people, 19 were classified as at high risk for having early Alzheimer's disease due to smaller size of particular regions known to be vulnerable to Alzheimer's in the brain's cortex, 116 were classified as average risk and 24 as low risk. At the beginning of the study, participants were also given tests that measured memory, problem solving and ability to plan and pay attention. The tests will go on over the next three yearsThe study found that 21 percent of those at high risk experienced cognitive decline during three years of follow-up after the MRI scan, compared to seven percent of those at average risk and none of those at low risk."Further research is needed on how using MRI scans to measure the size of different brain regions in combination with other tests may help identify people at the greatest risk of developing early Alzheimer's as early as possible," said study author Bradford Dickerson, of Massachusetts General Hospital in Boston and a member of the American Academy of Neurology.

SAN FRANCISCO, Dec. 8 (Xinhua) -- Apple on Thursday released iTunes Rewind 2011 and App Store Rewind 2011, its annual lists of top selling music, TV shows, movies and apps for the year.Apple picks Instagram as "iPhone App of the Year." Instagram is a free photo sharing application which enables users to confine photos into a square shape in an homage to both Kodak Instamatic and Polaroid cameras, and share them on a variety of social networking services.Photo editing software Snapseed is picked as "iPad App of the Year.""Angry Birds" was the top paid iPhone and iPad app for 2011. Its spinoffs, "Angry Birds Seasons" and "Angry Birds Rio," also make to the top 10 lists.ITunes' best-selling movie is "The Social Network" and "Doctor Who" is the best-selling season TV series. An episode of "Walking Dead" is the best-selling TV episode.The best-selling fiction book was "The Help." "Steve Jobs," the only official biography of the late Apple co-founder, was the best- selling non-fiction book.In iTunes Rewind 2011, British singer Adele sweeps three major music category, named for top-selling song (Rolling in the Deep), top-selling album (21) and iTunes Artist of the year for 2011.ITunes also picked Foo Fighter's "Wasting Light" as album of the year, "Pumped up Kicks" by Foster the People as song of the year, and Nicki Minaj as its breakthrough artist of the year.First launched as iTunes Music Store in 2003, the Apple online digital media store became the largest music seller in the United States in 2008. Last February, Apple announced that more than 10 billion songs have been sold in iTunes Store. In 2008, Apple said over 200 million TV episodes had been sold.The Apple App Store was initially released in July 2008. According to Apple's data, more than 18 billion apps have been downloaded as of Oct. 4.

来源：资阳报