济南包皮突然破了(济南怎样让男人持久些) (今日更新中)

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.

BEIJING, Jan. 23 (Xinhua) -- An online survey has revealed that Chinese people have a mixed opinion on Sunday's Spring Festival TV gala, the 30th of its kind since 1983, albeit many of them agree that there were innovations and improvements in it.As of 10:00 p.m. Monday, about 48 percent of some 71,000 respondents in the poll held by sina.com.cn, one of China's major portal websites, said they think the gala fall short of their expectations.Another 23 percent of them said they think the gala was just fine, and only 10 percent said it was splendid.The gala, an annual grand celebration broadcast by the China Central Television on the eve of the traditional Spring Festival, China's lunar New Year, is the most-watched TV event in the country."I can see the efforts of the gala staff, but it is still not good enough," said netizen "roam the life" at the Sina weibo, a popular Twitter-like microblogging website.At the Sina weibo website, the topic "grumble at the 2012 Spring Festival TV gala" has outnumbered others with over 64 million comments and become the hottest topic of Monday.Nonetheless, many people acknowledge the innovations and improvements in the gala.The gala made some attempts to take a more public-friendly approach by inviting some "grassroots" performers, such as farmer-singer Zhu Zhiwen, as well as cutting all commercials during the broadcast.A dance performance depicting a romance of peacocks and starring Yang Liping, a well-known dancer in China, is the most-followed topic at the gala's official weibo account, drawing over 3,500 comments.The audience was also impressed by a piano duet played by Li Yundi, first prize winner of the the 14th Frederic Chopin international piano competition, and Leehom Wang, a Chinese-American pop singer-songwriter.Moreover, about 59 percent of the online poll respondents said the stage design was quite cool."There are really many improvements in the gala, but it is absolutely difficult to please everyone," wrote weibo user "Wawamiaowaiwai."Unlike their elder generation, the young generation in China has more diversified options for entertainment, and it is of great challenge to attract them at the Spring Festival celebration, said Xia Xueluan, a professor of sociology with Peking University.

BEIJING, Nov. 27 (Xinhua) -- A government official on Sunday refuted an accusation that discriminations widely exist in the country's civil service recruitment process.Nie Shengkui, director of the examination and recruitment department of the State Administration of Civil Service (SACS), said that the recruitment process is always based on the principles of justice and fairness, which has promoted the upward mobility of people from the grassroots.The ratio of recruited male and female applicants is around 6 to 4 in last year, equal to the ratio of the male and female applicants, and more than 92 percent of the recruited are from the ordinary families in the grassroots, including 29 percent from the rural areas, according to Nie.Nie's words came after a survey report published earlier last week, accusing the authorities of having discriminatory requirements in civil servants recruitment.Conducted by the Constitutionalism Research Institute of China University of Political Science and Law, the survey report said that without publicly acknowledging any form of discrimination, many public offices don't hesitate to hide their preferences on age, gender, education and state of health in recruitment.Nie defended that it is necessary to set some requirements in the recruitment in a bid to guarantee the future civil servants can carry out there duty competently."Civil servants recruitment is a process of choosing talents for the government to manage the country, not for promoting employment," said Nie, "so there is nothing to do with employment discriminations."Chinese college grads are usually enthusiast about finding jobs within government branches, especially at a time when people are trying to secure a stable future amid a troubled global economy.A total of 970,000 applicants took the general exam of the recruitment on Saturday and Sunday, They will compete for only 18,000 posts in central government departments and their local branches.

BEIJING, Oct. 13 (Xinhuanet) -- A new study finds that ginger may decrease the risk of colon cancer through diminishing the inflammation in the gut, according to media reports Thursday.Prior researches have found that chronicle inflammation in the gut is related to colon cancer, suggesting easing inflammation in intestines might reduce the risk of the cancer, said Suzanna M. Zick, lead author of the study published online in Cancer Prevention Research. Zick, also a naturopathic physician and research associate professor at University of Michigan Medical Center, and her colleagues, assigned 30 volunteers to take pills containing two grams of either placebo powder or ginger root extract, equivalent to about two tablespoons of ground-up raw ginger root.And they recorded the inflammations in the participants' intestines before and after the test period.The researchers found that participants taking ginger pills had 28 percent less inflammation in their intestines after the test. But no difference was found in those who took placebo.The findings are promising, but the researchers are not yet recommending people start taking more ginger at meal times. The study only involved 30 participants, so it is just a preliminary study. Zick said they hope to launch a larger study in the future, according to USA Today.

SINGAPORE, Oct. 10 (Xinhua) -- A Singapore start-up firm has devised an innovative application to allow phone users to have access to their positioning information within buildings, where traditional global positioning system has often proved inaccurate, local daily Business Times reported on Monday.The firm YFind Positioning System feels that the application can help turn Singapore into the world's first location- intelligent city.Ting See Ho, co-founder of the firm, said the application works by first verifying the GPS coordinates to identify the building the user is in, and then collecting RSSI (received signal strength information) readings off WiFi access points within the building.The information is then sent by the phone to the central positioning server for comparison against records of the radio map of the building, which is calibrated earlier by the company.Ting said the RSSI readings continually fluctuates, making it difficult to estimate a position. This is where YFind Positioning System steps in with its patent-pending probabilistic algorithms to help accurately estimated the user's indoor positions.Once the phone application determines the location, then, it is able to map a course for a shop or other destination within the building where the user wants to go."You can think of it as creating an 'indoor GPS' environment in the buildings where satellite signals cannot be read," Ting said.He said that more than ten organizations in Singapore have approached the company to discuss deployment and partnerships and that it has begun work on three proof-of-concepts.The company's immediate goal is to make Singapore the world's first location-intelligent city before going to other cities, he said.

来源：资阳报