中山治疗便血费用(中山拉血了怎么回事) (今日更新中)

JERUSALEM, May 8 (Xinhua) -- Israeli researcher Jacob (Koby) Scheuer, from the Tel Aviv University (TAU) School of Electrical Engineering, has developed a nano-scale gyroscope, the Ha'aretz daily reported Sunday.Scheuer developed a new optic-fiber nano-sensor four years ago, along with an optic gyroscope that works in conjunction with the sensor. As he developed the devices, it occurred to him that his discovery could be harnessed to surgical needs, virtual reality, or communications, said the report."What we developed here is an optic gyroscope," Scheuer told Xinhua in a recent interview on Sunday, "like the others, but the breakthrough is that we found a way to measure rotation in a very, very small device using the optic sensor."Optic gyroscopes emit light when they rotate, and change its wavelength when there is any change in the speed of rotation, making it possible to measure velocity and position by the differences in light.Scheuer's gyroscope, however, is so small in comparison to the others commonly used in planes, trains and vehicles, that it can be used in cell phones or watches and does not need satellite connection like the ubiquitous Global Positioning System.The applications of this gyroscope and optic sensor are almost endless, as Scheuer puts it."It can be a pill that you swallow and can move through your body to take pictures or release drugs in a localized area," the researcher explained, "or it can be used by a doctor to operate on a patient who is thousands of kilometers away.""Our gyroscope has complete independent navigation capability, which the others don't have," he stressed.Though the new optic gyroscope works in theory, it still hasn't been tried in out in reality. "It will take some time until we can empirically demonstrate our work, I would say about three to five years," Scheuer added.Alongside the gyroscope, Scheuer continues to work on the optic sensor, whose applications can also be found in security, such as an information security system developed by Scheuer to safeguard online information that acts as a key bearer."When both parties have 'the key' it's virtually impossible to hack the information sent," Scheuer noted, terming the development as a "total paradigm change."

SAN FRANCISCO, May 6 (Xinhua)-- Latest research released Friday shows that Google Android has become the No.1 smartphone platform in the United States in the first quarter as more smartphone manufacturers have adopted the operating system.During the three months ending in March, Google Android grew 6. 0 percentage points to 34.7 percent market share, among the 72.5 million U.S. smartphone users, reported comScore, an Internet marketing research company.The number of smartphone users increased by 15 percent on a quarter-on-quarter basis, said the research.Research in Motion, developer of Blackberry smartphones, ranked second with 27.1 percent, a slide of 4.5 percentage points on a quarter-on-quarter basis. Apple grew 0.5 points to 25.5 percent share, followed by Microsoft (7.5 percent) and Palm (2.8 percent).According to the research, 234 million Americans age 13 and older used mobile devices in the first quarter. Samsung ranked as the top handset maker with 24.5 percent of U.S. mobile subscribers, and LG ranked second with 20.9 percent share, followed by Motorola (15.8 percent) and RIM (8.4 percent). Apple continued to gain share following the launch of the Verizon iPhone, growing by 1.1 percentage points to 7.9 percent of subscribers.On mobile content use, 68.6 percent of U.S. mobile subscribers used text messaging on their mobile device in March. Browsers were used by 38.6 percent of subscribers (up 2.2 percentage points), while downloaded applications were used by 37.3 percent (up 2.9 percentage points).Accessing of social networking sites or blogs increased 2.6 percentage points, representing 27.3 percent of mobile subscribers. Playing games comprised 25.7 percent of the mobile audience, while listening to music represented 17.9 percent, said the report.

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. 28 (Xinhua) -- Construction began on China's first low-speed maglev line Monday in Beijing, a project that will make China only the second country with a low-speed maglev line after Japan.The project marked China's ability to industrialize low-speed maglev technologies, said Chang Wensen, father of China's maglev technology and professor at the National University of Defense Technology.The 10-kilometer line runs from Shimenying Station in west Beijing's Mentougou District to Pingguoyuan Station in the Shijingshan District.The line, a section of Line S1 on the Beijing subway network, is expected to be completed in 2013 with a designed speed of 100 to 120 km per hour.China's research of maglev technologies was started in the 1980s by a team led by Chang Wensen. A 204-meter test line in central China's Hunan Province and a 1.5-km test line in north China's Hebei Province were built jointly by Beijing Maglev Technology Development Co., Ltd. and National University of Defense Technology.The intensity of the magnetic field had been tested as safe, according to a test report of Institute of Electrical Engineering, Chinese Academy of Sciences.The cost of the low-speed maglev line was estimated at 300 million yuan (4.6 million U.S. dollars) per kilometer, slightly more than light rail, but cheaper than the subway, which cost more than 600 million yuan a kilometer, said Li Jie, director of technology research center of National University of Defense Technology.The technology was also under consideration for Line 8 of the subway network in Shenzhen, in south China's Guangdong Province, said Liu Zhiming, board chairman of Beijing Maglev Technology Development Co., Ltd.."If Shenzhen adopts the technology, Line 8 will be China's second low-speed maglev line," he said.The world's first low-speed maglev line, at 8.9 km long, was completed in Japan in March 2005.Maglev, short for magnetic levitation, technology uses a large number of magnets to lift and propel a vehicle, making it faster, quieter and smoother than conventional wheeled transport systems.High-speed maglev vehicles can reach speeds of 450 km per hour and are usually used in long distance transportation, while low-speed maglev lines are usually used in short distance transportation.Construction also began on another seven lines on the Beijing subway network Monday.With an investment of 82 billion yuan (12 billion U.S. dollars), the eight lines will total 113.7 km in length and are expected to open from 2013 to 2015.Beijing has 16 lines under construction.

HARARE, Feb. 11 (Xinhua) -- Chinese Foreign Minister Yang Jiechi on Friday called on the West to lift sanctions they imposed on Zimbabwe while Zimbabwean President Robert Mugabe applauded the Asian giant for its continued political and economic support.Addressing journalists soon after meeting Zimbabwe President Mugabe, Yang, who is on a two-day visit, said Zimbabweans and other African people have a right to choose their own development path."We believe there should be the lifting of sanctions by certain countries. We think that is the voice of the Zimbabwean people and that is also the view of all the parties concerned here in Zimbabwe," Yang said, adding that no country has a right to dictate to another."We believe all nations should respect each others sovereignty and territorial integrity," he said."China believes that Africans have the right to choose their own way of development as they are the masters of the African continent. All others are just guests," he said.Yang said that China appreciates assistance from Africa and would also continue to reciprocate the support.Addressing the Chinese delegation earlier, Zimbabwean President Mugabe said the West continues to persecute Zimbabwe through sanctions for the decision the county took to empower its people through land.He said the imposition of sanctions was despite the fact that Zimbabwe and Britain had agreed that the former would redistribute the land while the latter would compensate affected farmers."The Western countries have imposed sanctions on us for taking our land although we had discussed this in 1979. That is what started the problem," Mugabe said.Mugabe said Britain had since turned to political reasons such as human rights, democracy and rule of law to justify continued sanctions imposed on Zimbabwe.He applauded continued cooperation between China and Zimbabwe which dates back to the struggle for independence.Meanwhile, China extended a 50 million yuan (7.5 million U.S. dollars) grant to Zimbabwe.Yang and his Zimbabwean counterpart Simbarashe Mumbengegwi signed the agreement on behalf of their countries.In his meeting with Mumbengegwi, Yang who described Zimbabwe as a "brother" said the two countries had identified areas for further cooperation such as infrastructure, agriculture, water conversation and personnel training.

来源：资阳报