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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 23 (Xinhua) -- People who are more physically active are less likely to have high blood pressure associated with a high-sodium diet, a new study suggests.The study was conducted by researchers at the Tulane University School of Public Health and Tropical Medicine in New Orleans, HealthDay News reported on Wednesday.Study findings were presented at the on-going American Heart Association's meeting on nutrition, physical activity and cardiovascular disease, held in Atlanta, said the report.To explore a potential association between exercise and the hypertensive role of dietary salt, the researchers focused on roughly 1,900 men and women (average age 38) living in a rural region in northern China. None took blood pressure medication during the study, according to the report.For one week all of the participants consumed 3,000 mg of sodium a day in their diet; for another week, they were placed on a high-sodium diet -- 18,000 mg per day.Nine blood pressure readings were taken each week, and questionnaires were completed to assess routine levels of physical activity, ranging from "very active" to "quite sedentary."When switching from the lower-sodium to a high-sodium diet, those who experienced a 5 percent or greater boost in their systolic blood pressure (the heart contraction measure represented by the top figure of a blood pressure reading) were deemed "high salt-sensitive."Those reporting the most physical activity had a 38 percent lower risk of being highly salt-sensitive than the least active group. This group was the least likely to see a 5 percent or greater rise in their blood pressure in response to a high-salt diet.Compared with the most sedentary group, those in the next-to- highest activity group had a 17 percent lower risk of salt- sensitivity, and those in the next-to-lowest activity group had a 10 percent lower risk.The team concluded that engaging in physical activity has a " significant," independent and progressively healthful impact on the degree to which salt sensitivity relates to blood pressure."For those with low physical activity, their blood pressure will increase more if they increase their sodium intake," study co- author Dr. Jiang He, chair of the department of epidemiology at the school, said in remarks published by HeathDay News."It's a little bit of a surprise," He added. "But this is the first study to look at this particular association between physical activity and salt sensitivity and blood pressure. But after thinking it over it makes sense, because we already know that physical activity will reduce blood pressure."High blood pressure, or hypertension, is a leading cause of stroke. Because of salt's association with high blood pressure, the American Heart Association recommends consuming less than 1, 500 mg of sodium per day.

BEIJING, Jan. 21 (Xinhua) -- Chinese Vice Premier Li Keqiang on Friday stressed the importance that local governments improve management of land and resources, as it remains vital for the stable and relatively quick development of the nation's economy.Li said China faced the difficult tasks of land and resource management as resources are becoming scarce amid the country's quickening industrialization, urbanization, and agricultural modernization.He said the nation must continue preserving arable land. To ensure grain security, China set a "red line" to guarantee its arable land never shrinks to less than 1.8 billion mu (120 million hectares).Chinese Vice Premier Li Keqiang (R) shakes hands with outstanding representatives from local departments in charge of land and resources in Beijing, capital of China, Jan. 21, 2011.Li also called on local authorities to step up efforts to protect valuable mineral resources while using resources more efficiently and in a frugal manner.At the same time, the senior Chinese official said land should be guaranteed for the nation's plan to build 10 million affordable houses for low and middle income people this year.Further, Li urged local authorities to improve work in monitoring and taking precautionary measures against geological disasters to ensure the safety of people's lives and property.

CANBERRA, April 14 (Xinhua) -- Scientists on Thursday expressed disappointment to the decision to cancel the long-running Australian Science Festival in Canberra.The festival has been operating during August for the past 19 years with free and ticketed science education activities.However, the festival organizers on Wednesday announced to halt this year's program after failing to secure support from the Australian Capital Territory state government in time to arrange events.According to Australian Science Communicators president, Jesse Shore, thousands of school children have attended the festival over its history to learn more about science as a career."It's encouraged other activities to join it, it was very important in getting National Science Week started, and that's stimulated a lot of other science communication activities," he told ABC News on Thursday.Shore said the decision to close it down is unfortunate as the event has been very influential and instrumental promoting science communications activities.He said he hopes that a number of people would gather together in a new partnership, with new ideas and hopefully a new funding base.

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