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SAN FRANCISCO, April 5 (Xinhua) -- Apple Inc.'s iPad 2 has topped the ratings by Consumer Reports, an influential U.S. magazine for product reviews, in the latest tests of the 10 most- promising tablet computers.According to the ratings released on Tuesday, the Apple iPad 2 with Wi-Fi plus 3G (32G), which is priced at 730 U.S. dollars, topped the ratings, scoring "excellent" in nearly every category.Besides several models from Apple, other brands tested include Archos, Dell, Motorola, Samsung and Viewsonic. Each tablet was evaluated on 17 criteria, including touch-screen responsiveness, versatility, portability, screen glare and ease of use."So far, Apple is leading the tablet market in both quality and price, which is unusual for a company whose products are usually premium priced," Paul Reynolds, electronics editor at Consumer Reports, said in a statement.The Motorola Xoom, whose price is 800 dollars, stood out as the iPad 2's main rival. It boasts several features that the iPad lacks, including a built-in memory card reader and support for the Flash videos.The first-generation iPad, priced at 580 dollars, also outscored many of the other models tested but tied with the Motorola Xoom, according to tests by Consumer Reports.

LOS ANGELES, March 2 (Xinhua) -- Those who take a nap are more likely to have lower levels of blood pressure despite stress, said a new study in the latest issue of International Journal of Behavioral Medicine available on Wednesday.In the study, researchers at Sarah Conklin of Allegheny College in Meadville, Pennsylvania examined 85 healthy university students, who were divided into two groups, with one group taking an hour- long nap during the day, and the other group having no time to sleep. Both groups were given a mental stress test.The study found that participants in both groups experienced increase in blood pressure and pulse rates when they took the stress test, but the average blood pressure of those who slept for at least 45 minutes was significantly lower after the stress test than it was for those who did not sleep.The researchers drew the conclusion that a daytime nap of at least 45 minutes may help stressed-out people lower their blood pressure and protect their heart."Our findings suggest that daytime sleep may offer cardiovascular benefit by accelerating cardiovascular recovery following mental stressors," the researchers said in the study."Further research is needed to explore the mechanism by which daytime sleep is linked with cardiovascular health and to evaluate daytime sleep as a recuperative and protective practice, especially for individuals with known cardiovascular disease risk and those with suboptimal sleep quality," they added.Sleep deficiency is common in the United States, posing a long- term health threat. On average, Americans get nearly two hours less sleep a night than they did 50 years ago, according to background information provided by the journal.

LOS ANGELES, April 7 (Xinhua) -- Using NASA's Galaxy Evolution Explorer (GEE) satellite, U.S. astronomers are hunting for nearby, hard-to-see stars which could very well be home to the easiest-to-see alien planets, it was announced on Thursday.U.S. astronomers are ferreting out the new targets after the glare of bright, shining stars has frustrated most efforts at visualizing distant worlds, NASA's Jet Propulsion Laboratory (JPL) said.So far, only a handful of distant planets, or exoplanets, have been directly imaged. Small, newborn stars are less blinding, making the planets easier to see, but the fact that these stars are dim means they are hard to find in the first place."Fortunately, the young stars emit more ultraviolet light than their older counterparts, which makes them conspicuous to the ultraviolet-detecting GEE," JPL said in a press release."We've discovered a new technique of using ultraviolet light to search for young, low-mass stars near the Earth," said David Rodriguez, a graduate student of astronomy at University of Californian, Los Angeles. "These young stars make excellent targets for future direct imaging of exoplanets."Young stars, like human children, tend to be a bit unruly -- they spout a greater proportion of energetic X-rays and ultraviolet light than more mature stars. In some cases, X-ray surveys can pick out these youngsters due to the "racket" they cause. However, many smaller, less "noisy" baby stars perfect for exoplanet imaging studies have gone undetected except in the most detailed X-ray surveys. To date, such surveys have covered only a small percentage of the sky, according to JPL in Pasadena, Los Angeles.Rodriguez and his team figured that the GEE, which has scanned about three-quarters of the sky in ultraviolet light, could fill this gap.Astronomers compared readings from the telescope with optical and infrared data to look for the telltale signature of rambunctious junior stars. Follow-up observations of 24 candidates identified in this manner determined that 17 of the stars showed clear signs of youth, validating the team's approach, JPL said."The Galaxy Evolution Explorer can readily select young, low- mass stars that are too faint to turn up in all-sky X-ray surveys, which makes the telescope an incredibly useful tool," Rodriguez said in the release.

BEIJING, Jan. 24 (Xinhua) -- China's top economic planner said Monday that price supervision and control measures have achieved steady progress with 2010's Consumer Price Index, slightly exceeding the target ceiling by 0.3 percentage points to hit 3.3 percent.To rein in soaring commodities prices, joint efforts have been made to manage inflation expectations, promote production, ensure supplies and strengthen price supervision in 2010, said the National Development and Reform Commission (NDRC) in an online statement.Prices of necessities accelerating during the second half of 2010 have been contained with vegetable prices down 9.4 percent in December from the previous month last year, it said.Further, prices of edible vegetable, pork, egg, sugar,liquefied petroleum gas and clothing also decreased significantly in December month on month, the statement said.To cope with rising prices beginning in July 2010, especially prices of basic supplies, the central government promptly introduced joint inter-ministerial meetings to discuss price controls among 17 ministries and ordered local governments to establish the same mechanism, it noted.Local governments have worked on improving agricultural facilities, especially in south China's Hainan province, to increase vegetables supplies for northern cities over the past year, the statement said.The statement forecasts that vegetable planting areas in 2010's autumn and winter will increase 530,000 hectares year on year, sending output to 337 million tonnes.To ensure production and supply, departments have worked to reduce fertilizer exports and promote links between production areas and purchasing areas, it added.Further, relevant authorities also took measures to stabilize prices of electricity and coal, and to ensure smooth transportation of agricultural produce.Authorities also granted temporary subsidies and raised basic wages and minimum living subsidies for urban and rural residents to guarantee people's daily life.

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.