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LOS ANGELES, March 3 (Xinhua) -- More and more American adults are suffering from a decline in overall sleep duration, the U.S. Centers for Disease Control and Prevention (CDC) said on Thursday.It's recommended that adults should sleep seven to nine hours a night to maintain good health, but more than one-third of Americans do not meet that requirement, according to the CDC.Insufficient sleep poses a long-term heath threat and impairs work performance and the ability to drive safely, the CDC said.Chronic sleep loss also is associated with obesity, increased risk of death and other health problems, according to the CDC."Over the last 20 years there has been a decline in overall sleep duration in adults," said Lela McKnight-Eily, a clinical psychologist and epidemiologist at the CDC's National Center for Chronic Disease Prevention."Within our culture there seems to be a belief that sleep isn't a part of overall essential health," she said.McKnight-Eily and her colleagues studied the sleep habits of 74,571 adults in 12 states, 35.3 percent reported sleeping less than seven hours.In addition, 48 percent reported snoring, 37.9 percent said they fell asleep at least once during the day the previous month and 4.7 percent admitted to falling asleep at the wheel at least once.Drowsiness or nodding off while driving accounts for 1,550 deaths and 40,000 injuries a year, according to the U.S. Department of Transportation.To get enough sleep, Americans have to change lifestyle habits, including longer workdays and late nights on the computer, McKnight-Eily said, noting that too much screen time paring away much-needed sleep time.

BEIJING, Feb. 11 (Xinhua) -- Chinese society will age fast in the next five years and the government must be well prepared for the demographic change, said Chinese Vice Premier Hui Liangyu here Friday.Government policies needed adjusting and the social insurance network should be improved, Hui said at a meeting of the China National Committee on Aging.Also services for senior citizens should be better developed to meet their needs, said Hui, also the committee's director.The country will also work to expand the pension system in the rural area and cover as many senior people as possible, he said.Health authorities plan to build more medical facilities for the elderly and urban planning should take the needs of senior people into consideration, he said.

SAN FRANCISCO, May 4 (Xinhua) -- Intel Corp. on Wednesday announced that it will mass-manufacture chips using new transistors featuring a three-dimensional (3-D) structure, calling it a technical breakthrough in microprocessors.The 3-D transistor, called Tri-Gate, represents a fundamental departure from the two-dimensional planar transistor structure that has powered computers, mobile phones and other modern electronics, Intel said."Intel's scientists and engineers have once again reinvented the transistor, this time utilizing the third dimension," Paul Otellini, Intel's chief executive officer, said in a statement.Intel on Wednesday also demonstrated a 22-nanometer (nm) microprocessor, codenamed "Ivy Bridge," which will be the first high-volume chips to use the new 3-D transistors.Ivy Bridge is scheduled for high-volume production readiness by the end of this year, the company said.According to Intel, the 3-D transistors enable chips to operate at lower voltage with lower leakage compared to previous transistors, providing up to 37 percent performance increase at low voltage versus the company's 32nm planar transistors.The gain means that the new 3-D transistors are ideal for use in small handheld devices, which operate using less energy to " switch" back and forth, Intel noted.

WASHINGTON, May 27 (Xinhua) -- The U.S. Treasury Department said in a report released on Friday that China was not manipulating its currency."In China, since the authorities decided in June 2010 to allow the exchange rate to appreciate in response to market forces, the renminbi (RMB) has appreciated by a total of 5.1 percent against the dollar in nominal terms through the end of April 2011, or at an annual pace of approximately 6.0 percent," noted the semi- annual report on international economic and exchange rate policies.The Treasury said that as inflation in China is significantly higher than it is in the United States, the renminbi has appreciated more rapidly against the dollar on a real, inflation- adjusted basis, at a rate of around 9 percent per year.The delayed report, which was originally scheduled to be sent to the Congress on April 15, finds "no major trading partner of the United States" manipulated its currency during the period covered in the report.The Treasury added that it will continue to "closely monitor" the renminbi appreciation pace.The report also noted that the U.S. economy is recovering from its deepest recession in the post-war period."While recent growth is encouraging, the economy still faces significant challenges," said the report. The number one challenge is still in the labor market.The U.S. unemployment rate, currently at 9.0 percent, is not expected to fall significantly this year.Besides, housing market and long-term fiscal position are " unsustainable," according to the report.In recent remarks, Treasury Secretary Timothy Geithner stated that China is the fastest growing market for U.S. exports. In 2010, U.S. exports to China grew at a pace that was 50 percent higher than the rest of the world.

WINDHOEK, May 21 (Xinhua) -- Top Chinese legislator Wu Bangguo on Saturday met with Namibian President Hifikepunye Pohamba on advancing the bilateral cooperation to further develop the partnership with Namibia.Wu, chairman of the National People's Congress (NPC) Standing Committee, China's top legislative body, extended Chinese President Hu Jintao's greetings to Pohamba and hailed an "all- weather" partnership forged between the two nations.Namibia is one of the youngest states in Africa, which became fully independent in 1990.Wu reviewed the profound friendship between the two countries, which established diplomatic ties one day after Namibia's announcement of its full independence.Wu said the two countries have reaped good harvests in cooperation in the fields of politics, trade, culture, education, public health and culture in recent years, which has already set a model for countries engaged in the South-South cooperation.He also highlighted the mutual understanding and support on issues concerning each other's core interests, and to bring the bilateral economic and trade cooperation to a new high, Wu put forward a three-point proposal concerning the importation of the husbandry and aquatic products, resource and mining as well as the infrastructure construction.Namibia is a nation with significant influence in the southern Africa, Wu said, vowing that China will work with the Namibian side to push the bilateral partnership to a higher level.For his part, Pohamba welcomed Wu's visit, the first one ever paid by a Chinese top legislator, and spoke highly of China's long-standing support for Namibia's national liberation and construction.Namibia will develop the long-term and strategic cooperation in a much broader domain with China and welcomes more Chinese businesses to invest in the country, the Namibian president said.On the China-Afrcia relationship, the two leaders stressed that the two sides should work closer under the framework of the Forum of China-Africa Cooperation to boost political mutual trust, substantial and pragmatic cooperation on trade and humanitarian exchanges, especially those among the young generations, so as to further enrich a new China-Africa partnership.Namibia is the first leg of Wu's 12-day African-Asian tour. He will also visit Angola, South Africa and Maldives.