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WASHINGTON, Jan. 2 (Xinhua) -- A systematic review of previous studies suggests that there may be a positive connection between physical activity and children's academic performance, according to a report published Monday in the Archives of Pediatrics & Adolescent Medicine.A group of scientists at the Vrije Universiteit (Free University) Medical Center in the Netherlands reviewed evidence on the relationship between physical activity and academic performance because of concerns that pressure to improve test scores may often mean more instructional time for classroom subjects with less time for physical activity.The authors identified 10 observational and four interventional studies for review, 12 of which were done in the United States, one in Canada and one in South Africa. Sample sizes ranged from 53 to about 12,000 participants between the ages of eight years and 18 years old. Follow-up varied from eight weeks to more than five years."According to the best-evidence synthesis, we found strong evidence of a significant positive relationship between physical activity and academic performance. The findings of one high-quality intervention study and one high-quality observational study suggest that being more physically active is positively related to improved academic performance in children," the report said.Background information in the article suggests that exercise may help cognition by increasing blood and oxygen flow to the brain, increasing levels of norepinephrine and endorphin to decrease stress and improve mood, and increasing growth factors that help create new nerve cells and support synaptic plasticity."More high-quality studies are needed on the dose-response relationship between physical activity and academic performance and on the explanatory mechanisms, using reliable and valid measurement instruments to assess this relationship accurately," the report concluded.

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.

NANJING, Dec. 8 (Xinhua) -- Chinese stargazers will have their best view of a total lunar eclipse in 10 years on Saturday if weather permits, the Zijinshan Astronomical Observatory under the Chinese Academy of Sciences (CAS) said Thursday.Wang Sichao, a research fellow with the observatory, said during the total eclipse, the full moon will not completely disappear from the Earth's shadow, but will take on a brilliant bronze color.He said the eclipse will be the best one seen in China since the last one occurred on Jan. 10, 2001."Theoretically, viewers can observe the eclipse from nearly everywhere in the country on Saturday," said the astronomer.He said the eclipse, the second this year, will last for 51 minutes. It will start at 8:45 p.m. and reach its climax at 10:06 p.m.Wang said Chinese viewers will have to wait until Oct. 8, 2014 to see the next total lunar eclipse.

BEIJING, Jan. 24 (Xinhua) -- Chinese President Hu Jintao and Premier Wen Jiabao on Tuesday exchanged congratulatory messages with their Israeli counterparts Shimon Peres and Benjamin Netanyahu on the 20th anniversary of the establishment of diplomatic ties between the two countries.Hu said the friendly exchanges between the Chinese and the Jewish people go back to ancient times.Since the forging of official ties 20 years ago, friendly cooperative ties between China and Israel have been developing continuously, and the exchanges and cooperation between the two sides in politics, economy and trade, culture, science and technology, agriculture and education have yielded fruitful results and brought tangible benefits to the two countries and the two peoples, Hu said.China attaches great importance to advancing Sino-Israeli ties and is ready to make joint efforts with Israel to take the celebration of the 20th anniversary as an opportunity to further consolidate the traditional Sino-Israeli friendship, deepen mutual cooperation in various fields, increase personnel exchanges on multiple levels, and promote a continuous development of friendly Sino-Israeli cooperative relations, he said.For his part, Peres said Israel and China established official diplomatic ties 20 years ago, which brought the friendship between the two countries to a historic high.He believed that the Israeli-Chinese friendship, which is based on a shared history, common values and ancient culture and tradition, will prevail.Peres said his country pays great attention to its ties with China in all areas, and is willing to conduct mutually beneficial cooperation with China in science and technology and other fields.In his message, Peres wished the Chinese people a "Happy New Year" in the Year of the Dragon.On the same day, Chinese Premier Wen also exchanged congratulatory messages with Israeli Prime Minister Netanyahu.Wen said their bilateral friendly cooperative relations have continued to grow over the last 20 years.Political exchanges between the two countries have been increasingly close, economic and trade cooperation have continued to flourish, and pragmatic cooperation in culture, science and technology, and agriculture has been fruitful, Wen said.China and Israel have their own advantages, as well as huge potential and broad prospects for cooperation, the Chinese premier said.China is ready to continue to expand and deepen its friendly bilateral cooperation with Israel and raise Sino-Israeli ties to a new high, Wen said.For his part, Netanyahu said the Chinese and the Jewish people have always been friends.During the past 20 years, China and Israel succeeded in forging a stable and diversified partnership, he said.The Israeli side is ready to fully explore the potential of bilateral ties and continue to expand cooperation in science and technology, sanitation, agriculture and environmental protection technologies and other fields with China, Netanyahu said.He believed that there will be more opportunities to further consolidate the friendship between the two peoples and deepen bilateral cooperation in the future.Chinese Foreign Minister Yang Jiechi and Israeli Foreign Minister Avigdor Lieberman also exchanged congratulatory messages.

SAN FRANCISCO, Dec. 15 (Xinhua) -- Microsoft on Thursday announced that it will automatically upgrade the Internet Explorer (IE) to the latest version to give Windows customers more protection against malicious software.According to the company's blog post, starting from Australia and Brazil next January, users of Windows XP, Vista and Windows 7 will get the IE updates if they have turned on automatic updating via Windows Update.Microsoft said the industry has been moving toward automatic updates as a norm since the biggest online threat these days is social engineering malware typically targeting outdated software like Web browsers.Automatic upgrades, also called silent updates for displaying no messages or windows during the progress, has been deployed by Google's Chrome and Mozilla's Firefox. It can ensure users have the newest versions of the browser, and therefore is seen as a big improvement to Internet security.According to the Microsoft Security Intelligence Report released in October, 99 percent of all attacks during the first half of 2011 came from unpatched but known vulnerabilities, and 90 percent of infections were attributed to vulnerability exploitation that had a security update available from the software vendor for more than a year.In the latest research data from Web analytics company StatCounter, Microsoft's IE has a strong lead with 40.63 percent of global browser market share, followed by 25.7 percent of Chrome and 25.23 percent of Firefox.