郑州多少度为近视眼(郑州郑州好点的眼科医院) (今日更新中)

WELLINGTON, July 29 (Xinhua) -- Scientists from around the world will gather on the east coast of New Zealand next week to discuss proposals to study "silent" earthquakes by drilling into the seabed.Silent quakes, also known as slow slip events, occur on the boundaries of the earth's tectonic plates, where one plate dives under another in areas known as subduction zones, and are slower than normal quakes, taking weeks or months to occur rather than seconds, and are rarely felt on the surface.About 70 scientists from 10 countries will convene in the city of Gisborne, which lies near the site of a major fault line and where scientists first identified silent earthquakes in 2002.Slow-slip events were first discovered with the advent of new measurement technologies on the west coast of Canada about 15 years ago and have since been recorded at about a dozen locations around the world, including four sites around New Zealand, said a spokesperson for New Zealand's Institute of Geological and Nuclear Sciences (GNS Science).About eight slow-slip episodes have occurred under Gisborne since 2002 at roughly two-year intervals.Scientists have proposed numerous theories to explain the phenomenon, but testing the theories is difficult as silent quakes happen many kilometers below ground."The best way to understand the true cause of slow-slip events is to drill into and sample the area on the plate boundary fault where they are known to occur, and monitor a whole range of physical and chemical properties at the plate interface," said Laura Wallace, of GNS Science.

BRUSSELS, May 31 (Xinhua) -- Baby bottles containing the substance Bisphenol A (BPA) would have to be pulled from the shelves across the European Union (EU) starting from Wednesday, in a "milestone" move to better protect the health of EU citizens, an official said Tuesday."Due to the fact that there are uncertainties concerning the effect of the exposure of infants to Bisphenol A, the commission deemed it both necessary and appropriate to take action," said John Dalli, EU Health and Consumer Policy Commissioner."The aim is to further reduce the exposure of the most vulnerable part of our population, i.e. infants," he said.The ban, adopted in an EU directive in late January, would prohibit baby bottles containing BPA from placing on the EU market and import into the 27-member EU from June 1.Previously, the bloc had already banned the manufacture of the controversial baby bottles on March 1, and the industry has been withdrawing such products voluntarily.BPA is an organic molecule that is used in the manufacture of polycarbonate plastics, which are used to manufacture plastic materials, such as baby bottles.Traces of BPA can be released from plastic containers into the food they carry if these containers are heated at high temperatures. They may lead to early sexual development of children and could cause cancer, according to health officials.China would also prohibit the manufacture of feeding bottles containing BPA from June 1, while imports and sales of bottles containing BPA would be banned starting from Sept. 1.

SAN FRANCISCO, Sept. 22 (Xinhua) -- Facebook on Thursday introduced a new feature called Open Graph, enabling users to access and share a wide range of media and lifestyle content on the social network site.According to Facebook's chief executive officer (CEO) Mark Zuckerberg, Open Graph lets users share what they are doing in Facebook-connected apps as they are doing it.These social apps focus on media apps including books, news, music, TV, movies and games, as well as lifestyle apps such as exercise, food, fashion and travel."The last five years of social networking have been about getting people signed up, and getting people connected with their lives. The next five years are going to be defined by the apps and depth of engagement," the young CEO said in a keynote speech at Facebook's f8 developer conference.Take music for example, Facebook integrates with European music streaming service Spotify. If one's Spotify account is connected to Facebook, a message will show up in the Ticker stating the song one is listening to and in the Timeline, a new design of one's profile page. The friends of the user can listen to the same song at the same time by hovering mouse over the song in Timeline or Ticker.Spotify founder and CEO Daniel Ek and movie streaming service Netflix CEO Reed Hastings also took stage as guest speakers to introduce their partnership with Facebook.Zuckerberg also introduced social news reading applications from major news organizations such as The Washington Post and Yahoo News, which allow users to access the content directly on Facebook.Earlier at the f8 conference, Timeline was unveiled as a new feature. It is a new profile design allowing users to scroll vertically through the big moments of one's life in a single page.Zuckerberg assured users that they have complete control over their Timeline, saying they can decide what content will appear and who can see it. The new feature will be available in a few weeks.Since Google launched its own social network "Google+" in June, Facebook has been in a combat mode, striving to roll out new products and features to beat the search giant. In his keynote speech on Thursday, Zuckerberg said half a billion people now use Facebook every day.Two days before the f8 conference, Google announced to open its social network to the public, noting it has introduced 100 new features in the three-month trial.

LOS ANGELES, July 7 (Xinhua) -- Obesity rates in the United States climbed over the past year in 16 states, and not a single state reported a decline in the proportion of excessively overweight residents, according to a report released on Thursday.The report, published by HealthDay News, found that more than 30 percent of the people in 12 states are obese. Four years ago, only one state could make that claim.Twenty years ago, "there wasn't a single state that had an obesity rate above 15 percent, and now every state is above that," said Jeff Levi, executive director of Trust for America's Health, which compiled the report."We have seen a dramatic shift over a generation," he added. " This isn't just about how much people weigh, but it has to do with serious health problems like diabetes and hypertension. These are the things that are driving health care costs."With the exception of Michigan, the 10 most obese states are in the South. The Northeast and West reported the lowest obesity rates. In addition, in eight states, more than 10 percent of adults suffer from type 2 diabetes, according to the report.Mississippi, where 34.4 percent of the people are obese, has the highest obesity rate. Other states with obesity rates above 30 percent include: Alabama, Arkansas, Kentucky, Louisiana, Michigan, Missouri, Oklahoma, South Carolina, Tennessee, Texas and West Virginia. Thirty-eight other states have obesity rates above 25 percent.For the second year in a row, obesity rates rose in Illinois, Kentucky, Massachusetts, Missouri, Rhode Island and Texas.And, for the third year straight, more residents of Florida, Kansas, Maine, Oklahoma and Vermont tipped the scale toward obesity.Colorado, with an obesity rate of 19.8 percent, is the only state where the rate is less than 20 percent, the report found.The study also found that more than one-third of children and adolescents are obese or overweight, with the highest prevalence in the South. However, the new data indicate that obesity among children and adolescents may have leveled off, except among the heaviest boys.

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