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BEIJING, July 11 (Xinhuanet) -- U.S. federal government officially announced that it denied the medical use of marijuana."Department of Health and Human Services concluded that marijuana has a high potential for abuse, has no accepted medical use in the United States, and lacks an acceptable level of safety for use even under medical supervision," U.S. Department of Justice declared Friday.The announcement will keep marijuana in the classification of dangerous, addictive drug as heroin.The decision comes almost nine years after medical marijuana advocates asked the government to reclassify marijuana, as its therapeutic effectiveness in treating some diseases and relieving pain of patients.Joe Elford, the chief counsel for Americans for Safe Access (ASA), said he was not surprised by the government's disapproval."It is clearly motivated by a political decision that is anti-marijuana," He noted.This is the third petition to reclassify marijuana has failed to be approved. The former two were filed in 1972 and in 1995, respectively.

BEIJING, Sept. 6 (Xinhuanet) -- San Francisco police said they had helped Apple search for a "lost item," following reports saying that a prototype of Apple's yet-to-be-released iPhone 5 had gone missing in July.Last week, technology news website CNET reported that an Apple employee lost at a tequila bar in San Francisco in July a prototype of iPhone 5, a new version of the company's mobile phone expected to be released in September or October.The San Francisco Police Department said in a press release that after the missing device was tracked using GPS technology to a San Francisco house, four police officers and two Apple employees visited the home."Apple employees called Mission police station directly, wanting assistance in tracking down a lost item," the statement said."The two Apple employees met with the resident and then went into the house to look for the lost item," it said. "The Apple employees did not find the lost item and left the house."Police did not say exactly what Apple had lost, but media reports found the file of San Francisco police's Friday press release about the hunt was named "iphone5.doc" -- an apparent hint of the new mobile device.A 22-year-old resident of the home, identified by SF Weekly as Sergio Calderon, told the newspaper that he has visited the bar where the phone was reportedly lost but he did not have the device.Calderon said the search of his house took place in July when police had traced the phone to the house using satellite positioning software on the device, but did not find anything in the house.Apple has declined to comment on the matter.Last year, an employee of the company lost a prototype iPhone 4 in a Redwood City bar before it was released. The details of the phone ware then unveiled by technology blog Gizmodo.Criminal charges have been filed against the man who found the prototype and another who brokered the deal to sell it to Gizmodo. Both men pleaded not guilty on Thursday.

BEIJING, Sept. 26 (Xinhuanet) -- One of the world's brightest minds aims to bring to the world a new, advanced three-dimensional image technology that will leave other such technology in the shadows."Our new technology will be better than that used in Avatar," says Professor Yau Shing-tung of Harvard University."The image will be more vivid than with technologies used in previous movies. The new technology is not only quicker but cheaper."Yau is one of the world's greatest mathematicians, having won the prestigious Fields Medal. He was once the dean of the department of mathematics at Harvard, and is now a professor there. He is also a visiting professor at Tsinghua University.Professor Yau and his team met professionals from Tsinghua University and Renmin University of China last week, and they discussed possible cooperation to apply the technology in making a demonstration movie using the new technology.Yau and a team started working on the new 3D technology, founded on geometrical principles, at Harvard 10 years ago.What marks it out is the extremely vivid pictures it produces.3D technology is used not only in making movies and in Internet games but in other areas , such as medicine. Movie audiences the world over were awestruck by the technology used in the movie Avatar."After I watched the movie, all I could say was 'Wow'," said Shen Yiren, an IT staff worker in Zhongguancun Science and Technology Park Zone. "3D technology has extended the boundaries of the human imagination."Yau says that six years ago the makers of Avatar had wanted him to cooperate with them but he turned them down."I was not sure that (Avatar) would be such a big success."Avatar's facial caption technology puts points on models' faces while the new technology uses geometric methods, saving time and money, Yau says.

BEIJING, Sept. 9 (Xinhua) -- Lenovo Group, China's largest PC maker, said it aims to become the world's second-largest PC provider by the end of this year, China Daily reported Friday.The PC maker will take aggressive action to expand in the international PC market left by its competitors because of strategy adjustment, the English newspaper quoted Liu Chuanzhi, the board chairman of Lenovo, as saying.A few weeks ago, the world's biggest PC maker Hewlett-Packard Corp. said it will spin off its PC sector. Apple Inc's former CEO Steve Jobs resigned."The Chinese market is the starting point for Lenovo, but it won't be the only place Lenovo should put emphasis on. We will set up a more active strategy for expanding in overseas markets," Liu said.The PC maker has long been focusing on the global market. It purchased the PC division of the IBM Corp. a few years ago. In January, it announced a 175-million-U.S.-dollar joint venture with Japan's NEC Corp. In July, Lenovo completed its acquisition of Medion AG, a German multimedia and consumer electronics maker.