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WASHINGTON, Jan. 16 (Xinhua) -- A new study examining weather patterns around the worldwide pandemics of influenza, which caused widespread death and illness in 1918, 1957, 1968 and 2009, finds that each of them was preceded by La Nina conditions in the equatorial Pacific. The study findings are published online Monday in the Proceedings of the National Academy of Science.The study's authors -- Jeffrey Shaman of Columbia University's Mailman School of Public Health and Marc Lipsitch of the Harvard School of Public Health -- note that the La Nina pattern is known to alter the migratory patterns of birds, which are thought to be a primary reservoir of human influenza. The scientists theorize that altered migration patterns promote the development of dangerous new strains of influenza.To examine the relationship between weather patterns and influenza pandemics, the researchers studied records of ocean temperatures in the equatorial Pacific in the fall and winter before the four most recent flu pandemics emerged. They found that all four pandemics were preceded by below-normal sea surface temperatures -- consistent with the La Nina phase of the El Nino- Southern Oscillation.The authors cite other research showing that the La Nina pattern alters the migration, stopover time, fitness and interspecies mixing of migratory birds. These conditions could favor the kind of gene swapping or genetic reassortment that creates novel and therefore potentially more variations of the influenza virus."We know that pandemics arise from dramatic changes in the influenza genome. Our hypothesis is that La Nina sets the stage for these changes by reshuffling the mixing patterns of migratory birds, which are a major reservoir for influenza," says Shaman.Changes in migration not only alter the pattern of contact among bird species, they could also change the ways that birds come into contact with domestic animals like pigs. Gene-swapping between avian and pig influenza viruses was a factor in the 2009 swine flu pandemic.

BEIJING, Dec. 2 (Xinhua) -- China cannot use its 3.2 trillion U.S. dollars in foreign exchange reserves to rescue other countries, a senior diplomat said on Friday."The argument that China should rescue Europe does not stand, as reserves are not managed that way," Vice Foreign Minister Fu Ying said at the Lanting forum, a gathering of Chinese officials, scholars and social groups held by the Ministry of Foreign Affairs to discuss international issues and foreign policy."China is not absent from international efforts to rescue Europe; it has been a positive and healthy participant," Fu said.Since the outbreak of the European financial crisis, China has dispatched more than 30 procurement delegations to Europe, helping to boost imports from the continent, Fu said.Fu added that there are many misunderstandings about the use of China's foreign reserves. "Foreign reserves are not domestic income or money that can be disposed of by the premier or finance minister," she said."Foreign reserves are akin to savings, and their liquidity should be ensured," Fu said."Foreign reserves are not revenue and cannot be relocated randomly. Under this circumstance, China should take the prospect of yields into consideration if it invests its foreign reserves," said Tian Dewen, an analyst at the Institute of European Studies at the Chinese Academy of Social Sciences.However, the outlook for the economic situation in the eurozone is currently uncertain, Tian said.Fu said China learned a lesson about the importance of foreign reserves during the Asian financial crisis of the late 1990s. ' "Reserves cannot be used domestically to alleviate poverty or taken abroad for development support," she said.She said that the way in which foreign reserves are managed should be in line with the principles of "safety, liquidity and proper profitability.""China's purchases of European bonds, International Monetary Fund bonds and U.S. bonds are also based on those principles," Fu said.Fu also said that China has no intention to gain profit by leveraging financial instruments."China will make efforts to overcome the crisis with Europe and the international community in the future," Fu said."As for the current turbulence in European markets, an authoritative voice is necessary in restoring market confidence. However, voices are diversified in Europe due to its political framework," said Chen Xin, an analyst at the Institute of European Studies at the Chinese Academy of Social Sciences.Fu also reviewed achievements made in trade and investment cooperation between the two sides."It is normal for Europe to strengthen its economic cooperation with China in the process of conquering its difficulties, although it is not proper to add negative political implications," Fu said.She urged Europe not to politicize China's foreign investments."Successful investment should be reciprocal. We hope our economic activities are not interpreted from a political prospective and are not imbued with political interests. We should follow market economy principles," Fu saidFu also took time to single out media reports about the crisis that she believes have been overtly political."Many European countries have shown their understanding and support for us, but there have also been some negative reports," Fu said."We should treat each other with a moderate and impartial mentality. That will make bilateral relations easier to handle," Fu said.She cited an investment bid by a Chinese company in Iceland that was turned down by the country's government.Zhongkun, a private Chinese real estate company founded in 1995, planned to buy 300 square km of land in Iceland to build a high-end resort with a total investment of 200 million U.S. dollars.However, Iceland's Interior Ministry rejected the bid, citing the size of the area of land involved and the fact that there is no precedent in Iceland for foreign countries to purchase large tracts of land.

BEIJING, Nov. 9 (Xinhuanet) -- Kids with a depressed father tend to have more behavior issues than those with a happy father, a latest US study shows.The study, published in the journal Pediatrics, used data from home interviews with almost 22,000 families. All of them had a child aged between five and 17, and both a mother and father living at home, according to a Reuters report Tuesday.After analyzing the data, researchers found 11 percent of the children with a depressed father had problems at home or at school, whereas only six percent of those with a happy father had such problems.This is one of the first large-scale studies focusing on the connection between depressed fathers and children's behavior, said study author Michael Weitzman from the New York University School of Medicine.In addition, the study echoed the previous finding that mothers' depression could increase children's emotional and behavior problems.It was reported that 19 percent of the children in the study struggled emotionally and behaviorally if their mother was depressed."Parents who are depressed tend to engage less with their children, tend to display less positive behaviors, and display more harsh, negative and critical behaviors," said Jeremy Pettit, a psychologist not involved in the study, cited by Reuters.

BEIJING, Jan. 23 (Xinhua) -- An online survey has revealed that Chinese people have a mixed opinion on Sunday's Spring Festival TV gala, the 30th of its kind since 1983, albeit many of them agree that there were innovations and improvements in it.As of 10:00 p.m. Monday, about 48 percent of some 71,000 respondents in the poll held by sina.com.cn, one of China's major portal websites, said they think the gala fall short of their expectations.Another 23 percent of them said they think the gala was just fine, and only 10 percent said it was splendid.The gala, an annual grand celebration broadcast by the China Central Television on the eve of the traditional Spring Festival, China's lunar New Year, is the most-watched TV event in the country."I can see the efforts of the gala staff, but it is still not good enough," said netizen "roam the life" at the Sina weibo, a popular Twitter-like microblogging website.At the Sina weibo website, the topic "grumble at the 2012 Spring Festival TV gala" has outnumbered others with over 64 million comments and become the hottest topic of Monday.Nonetheless, many people acknowledge the innovations and improvements in the gala.The gala made some attempts to take a more public-friendly approach by inviting some "grassroots" performers, such as farmer-singer Zhu Zhiwen, as well as cutting all commercials during the broadcast.A dance performance depicting a romance of peacocks and starring Yang Liping, a well-known dancer in China, is the most-followed topic at the gala's official weibo account, drawing over 3,500 comments.The audience was also impressed by a piano duet played by Li Yundi, first prize winner of the the 14th Frederic Chopin international piano competition, and Leehom Wang, a Chinese-American pop singer-songwriter.Moreover, about 59 percent of the online poll respondents said the stage design was quite cool."There are really many improvements in the gala, but it is absolutely difficult to please everyone," wrote weibo user "Wawamiaowaiwai."Unlike their elder generation, the young generation in China has more diversified options for entertainment, and it is of great challenge to attract them at the Spring Festival celebration, said Xia Xueluan, a professor of sociology with Peking University.