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LOS ANGELES, May 1 (Xinhua) -- Middle-aged adults who sleep too less or too much may be more likely to suffer cognitive decline, a new study suggests.According to the study, less than six hours of sleep each night is considered too little and more than eight hours as too much for middle-aged adults.The study, conducted by researchers at University College London Medical School, was published May 1 in the American medical journal Sleep.The researchers conducted the study in two periods -- the 1997- 1999 period and the 2003-2004 period. The participants were asked how many hours they slept on an average week night, and were asked the same question in 2003-2004 after an average 5.4 years of follow-up.The researchers compared those who reported changes in their sleep patterns with people whose sleep duration stayed the same over the course of the study.In the follow-up, each individual was given a battery of standard tests to assess his or her memory, reasoning, vocabulary, global cognitive status and verbal fluency.The study findings show that women who slept seven hours per night had the highest score for every cognitive measure, followed by those who had six hours of sleep. For men, cognitive function was similar for those who reported sleeping six, seven or eight hours.However, less than six hours of sleep -- or more than eight hours -- were associated with lower scores."Sleep provides the body with its daily need for physiological restitution and recovery," explained Jane Ferrie, a senior research fellow in the department of epidemiology and public health at the school. "While seven hours a night appears to be optimal for the majority of human beings, many people can function perfectly well on regular sleep of less or more hours."However, since most research has focused on the effects of sleep deprivation on biological systems, it is not yet fully understood why seven hours is optimal -- or why long sleeping appears to be detrimental, Ferrie said."Chronic short sleep produces hormones and chemicals in the body which increase the risk of developing heart disease and strokes, and other conditions like high blood pressure and cholesterol, diabetes and obesity," she added.

Google chairman Eric Schmidt has promised that the firm will simplify the process by which Android phone users agree to share their data.It follows questions in the US Senate about how much location information is stored by mobile handsets.Speaking in the UK at a conference on privacy, he also revealed that Google plans to offer web users more control over their online profile.Mr Schmidt insisted that the company took the matter "very seriously".He told attendees at the Big Tent debate in Hertfordshire that his firm was working on "a series of projects" aimed at increasing transparency.Those include a revised Google Dashboard, where users can see what data they have shared with the search giant."It is worth stressing that we can only do this with data you have shared with Google. We can't be a vacuum-cleaner for the whole internet," he said.Mr Schmidt stressed that Google was on the side of consumers when it came to privacy. "In general we take the position that you own your data and should be able to opt in or out of a service," he said.But he added that if users gave consent for sharing data, it would help Google improve its services."If you choose to give us that information we can do a better job. If we know a little bit more about you we can offer better targeted search," he explained.Super injunctions revealed A recent hearing in the US Senate quizzed Google on the amount of data stored on Android handsets. The company argued that it allows people to opt out of location-based services.But Mr Schmidt conceded that the terms and conditions whereby users sign up to services needs to be simplified. "We intent to do that," he said.He predicted that such services would be more heavily regulated in the future.During a lively debate on the issue of privacy, it was revealed to the Big Tent audience, alongside several names of current super-injunction holders, that more data has been collected in the last seven years than in the whole of previous human history.

BEIJING, Feb. 1 (Xinhua) -- A ceremony with a bonfire and firecrackers was held Tuesday night in the new seat of a quake-leveled county in southwest China's Sichuan Province, prior to the Chinese Lunar New Year on Thursday.The Lunar New Year, or Spring Festival, is the most important Chinese holiday. It is a time for family reunions, gift giving and fireworks.It will be even merrier for the survivors of the Wenchuan earthquake in 2008, who just moved into their new homes in the new town.The earthquake survivors are preparing for the first Spring Festival in their new homes.Xia Tianfeng of Beichuan County, Mianyang City, is sticking red paper decorations onto the windows of her new house for good luck in the New Year."We finally have our new house. Why wouldn't I be happy?" asked Xia.She and her family lived in a makeshift house for two years before moving into their new house one month ago.Dong Depa, 43, and his family moved into their new house in Yingxiu Town, the epicenter of the quake, five days ago."I can pay off the debt incurred to build the house in two years," said Dong, who spent only 30,000 yuan (4,541 U.S. dollars) for the house's construction and decoration, with the rest being shouldered by the government.Dong lost his two children in the quake but he and his wife have since had another child, a son."Last year, we spent the Spring Festival in the dormitory of the brick factory where I work as a cook. Now we can finally enjoy the festival in our own home," said Dong, unable to conceal his joy.Xia told Xinhua the ceremony for the new county seat was the real taste for a happy new year.Reconstruction has finished in the quake-hit zones in Sichuan, with most survivors now in their new houses.In Beichuan County alone, 96.5 percent of the survivors already have their new house.The new county seat is located in Yongchang Town, about 23 kilometers from the quake-leveled old one.The 8.0-magnitude earthquake struck southwest China on May 12, 2008, leaving about 80,000 people dead or missing.Waving goodbye to their temporary barracks, 7,397 households have been allocated new apartments, among which 3,504 households were former Beichuan residents, while others were from different Wenchuan earthquake-hits regions."The new apartment has already been simply decorated by the time I received the door key. With our new furniture, we can wait no longer to move into the home," said 45-year-old Xie Xinghe, a former resident of Beichuan.Including 50,000 yuan (about 7,575 U.S. dollars) in loans, Xie paid a preferential price of 79,600 yuan (about 12,000 U.S dollars) for the 100 square meter new apartment.Losing his only son in the earthquake, Xie and his wife adopted a one-year-old boy."It is the child who brings me new hope for the future," Xie said. Following the Lunar New Year celebration in his new home, Xie will try his best to work for some years to pay back the loan and save money to ensure a better education for his son."It is such magic to build a new town within three years, even so anywhere around the world. And we see it now," said Xu Zhenxi, director with the headquarter of new town program of Beichuan, which is supported by east China's Shandong Province.From May 25, 2009 to September 25, 2010, Shandong Province supported the new Beichuan county seat project, which was completed within 15 months.

BEIJING, March 13 (Xinhua) -- China's top legislator Wu Bangguo on Sunday met and extended regards to the journalists of leading Chinese media covering the annual sessions of the top legislature and advisory body."You have given full coverage on important issues such as the review of the draft 12th Five-Year Plan and the scheduled establishment of the socialist system of laws with Chinese characteristics," Wu said to the journalists.The stories written by the journalists " fully tell how lawmakers and political advisers performed their deputies, and reflect people's wishes and aspiration," said Wu, chairman of the Standing Committee of the 11th National People's Congress (NPC).Wu said that he expected the public media will do a better job in covering issues regarding to the political development path with Chinese characteristics and the people's congress system.The fourth session of the NPC will conclude on Monday morning, and the fourth session of the National Committee of the Chinese People's Political Consultative Conference ended Sunday.

来源：资阳报