安徽手动液压式血液循环模型(河南开放式中药学辅助教学系统) (今日更新中)

SAN FRANCISCO, Nov. 9 (Xinhua) -- Cisco Systems Inc., the world 's biggest networking equipment maker, on Wednesday reported that its profit fell about 7.9 percent in the most recent quarter.In the company's fiscal 2012 first quarter ending on Oct. 29, Cisco posted its net income of nearly 1.78 billion U.S. dollars, compared with 1.93 billion dollars in the same period a year earlier.Excluding some items, earnings per share in the quarter were 43 cents, better than the 39 cents estimated by analysts, according to Bloomberg.Cisco's sales in the quarter reached 11.26 billion dollars, an increase of 4.7 percent year-on-year and also topped analysts' projection of about 11 billion dollars."We delivered a solid quarter," John Chambers, Cisco's chief executive officer, said in a statement."We've completed the majority of our restructuring and have organized Cisco to successfully execute against our strategy of providing intelligent networks, architectures and integrated products that solve customers' business problems," he added.

BEIJING, Oct. 13 (Xinhuanet) -- Tyrannosaurus rex dinosaur, the giant prehistoric predator, was even bigger and heavier than it was estimated previously, a new study found.The finding was contained in a study published Wednesday in the scientific journal PLoS ONE.Using three-dimension scanning and computer modeling, researchers analyzed five skeleton fossils of T. rex dinosaur, including "Sue", the largest and most complete T. rex specimen ever found.The analysis tipped the scale of "Sue" at 9 ton, some 30 percent more than it was expected."At their fastest, in their teenage years, they were putting on 11 pounds or 5 kilograms a day," said John Hutchinson of the Royal Veterinary College in London, who co-led the study.The larger body mass indicated the better agility and the stronger lower-leg muscles of the ancient monster, said the researcher."Sue" could have a top speed of about 10-25 miles per hour when it ran on the Great Plains of North America 67 million years ago, Hutchinson suggested.

BEIJING, Nov. 22 (Xinhuanet) -- Underweight patients may have more possibilities of mortality within 30 days of general and vascular surgery compared with mildly obese patients, according to a research published online in Archives of Surgery Tuesday.Researchers at the U.S. National Surgical Quality Improvement Program conducted the research for the years 2005 and 2006, and assessed the contribution of BMI (Body Mass Index) to 189,533 postsurgeries morbidity and mortality by obesity classes.They found that compared with the middle BMI quintile group, patients with BMI value below 23.1, had greater chances for death. For the highest BMI quintile group, higher mortality rate was also observed.However, the researchers also found that obesity may as well be associated with increased mortality for some individual types of surgeries."These individual types of procedures include procedures with which the general surgeon should have definite experience: colorectal resection, colostomy formation, cholecystectomy, hernia repair, mastectomy, and wound debridement," said George J. Stukenborg, PhD, of the University of Virginia inCharlottesvilleand his colleagues.Based on a 30 –day morbidity and mortality risk calculation, the sample patients were categorized into BMI quintile ranges. BMI value of less than 23.1 was considered as lowest, values from 26.3 to 29.6 considered as the middle quintile, and above 35.2 considered as the highest.Factors such as lack of enough data on nonfatal complications and hospital resources, or examining mortality over the 30-day baseline, may cause limitations and inaccuracy to the research and more studies on a wider range of patients in terms of BMI are needed to further confirm the current conclusion, researchers said.

WASHINGTON, Jan. 2 (Xinhua) -- A systematic review of previous studies suggests that there may be a positive connection between physical activity and children's academic performance, according to a report published Monday in the Archives of Pediatrics & Adolescent Medicine.A group of scientists at the Vrije Universiteit (Free University) Medical Center in the Netherlands reviewed evidence on the relationship between physical activity and academic performance because of concerns that pressure to improve test scores may often mean more instructional time for classroom subjects with less time for physical activity.The authors identified 10 observational and four interventional studies for review, 12 of which were done in the United States, one in Canada and one in South Africa. Sample sizes ranged from 53 to about 12,000 participants between the ages of eight years and 18 years old. Follow-up varied from eight weeks to more than five years."According to the best-evidence synthesis, we found strong evidence of a significant positive relationship between physical activity and academic performance. The findings of one high-quality intervention study and one high-quality observational study suggest that being more physically active is positively related to improved academic performance in children," the report said.Background information in the article suggests that exercise may help cognition by increasing blood and oxygen flow to the brain, increasing levels of norepinephrine and endorphin to decrease stress and improve mood, and increasing growth factors that help create new nerve cells and support synaptic plasticity."More high-quality studies are needed on the dose-response relationship between physical activity and academic performance and on the explanatory mechanisms, using reliable and valid measurement instruments to assess this relationship accurately," the report concluded.

CANNES, France, Nov. 3 (Xinhua) -- Chinese President Hu Jintao on Thursday urged the world's major economies to work together to promote growth and financial stability."It is imperative that we stand on a higher plane, transcend differences on specific issues, move beyond short-term considerations, and jointly seek ways to overcome the crisis and sustain development," Hu told the Group of 20 (G20) summit here."At this critical moment, the G20 must work to address the key problems, boost market confidence, defuse risks and meet challenges and promote global economic growth and financial stability," said Hu.As the premier forum for international economic cooperation, the G20 must continue to demonstrate the spirit of standing together in times of adversity and pursuing win-win cooperation, he said.The Chinese president said "the current world economic situation deserves our high attention," cautioning the global recovery is fraught with instability and uncertainty and faces growing risks and challenges.Some major economies are experiencing economic slowdown and some countries are facing acute sovereign debt problems, said Hu.He also cited volatility in the international financial markets, and high inflationary pressure in emerging markets.Hu put forward a five-point proposal on what G20 nations need to do to tide over the crisis.First, the countries should ensure growth while paying attention to balance. Given the serious risks facing the global economy and continued market volatility, ensuring growth and promoting stability should be the top priority, he said."We should introduce new and strong measures to ensure that fiscal and monetary policies are fully implemented and that funding is channeled into the real economy to boost production and employment."Second, the G20 nations should strengthen unity and send a strong signal to the world as there is widespread panic and acute lack of confidence in the markets, said Hu.He urged G20 members to strengthen consultation and coordination, tackle sovereign debt risks, regulate cross-border capital flow, put the fluctuation of commodity prices under control, mitigate global inflationary pressure and make sure that the economic policies pursued by various countries do not offset each other.Third, global economic governance should be improved through reform, Hu said.The international financial crisis has highlighted the deficiencies in the global economic governance system, said Hu."Major efforts should be made to reform and improve the international monetary system, international trading system and commodity pricing mechanism," said the Chinese president.

来源：资阳报