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RIO DE JANEIRO, March 25 (Xinhua) -- The number of dengue fever cases in Rio de Janeiro city this year has already surpassed 10,000, local health authorities said on Friday.According to the city's Health Secretariat, in less than three months, the number of confirmed dengue fever cases in Rio reached 10,158, exceeding the figures registered in the entire years of 2009 (2,723) and 2010 (3,120).In Rio de Janeiro state, the number of confirmed dengue fever cases reached 20,150, and the death toll rose to 18.This week, the first two cases of type-4 dengue fever in Rio de Janeiro state were confirmed in the city of Niteroi. The type-4 dengue fever is not more dangerous than the other types, but as the disease had not been registered in the region before, the local population has no immunity to it.As there are four different types of dengue fever, a person can develop the disease several times.The last epidemic of dengue fever in Rio de Janeiro state occurred in 2008 when 174 people died of the disease and some 250,000 cases of dengue were registered.

DAVOS, Switzerland, Jan. 27 (Xinhua) -- A policy of more trade and greater openness to the rest of the world has brought significant benefits to China and greater market opportunities to its trading partners, the head of the World Trade Organization says."I don't think there is any question that China joining the WTO has been a very good thing for China and for the WTO and its members," WTO Director General Pascal Lamy said in an interview with Xinhua.The WTO chief was expected to join the forum "China's Impact on Global Trade and Growth" on the sidelines of the World Economic Forum annual meeting held in this Swiss alpine town."In joining the WTO, China successfully underpinned a policy of what had been 20 years of progressive openness," Lamy said.Adherence to economic reforms through international commitments ensured that China would stay on the path of openness, he noted, adding that the policy has helped the country economically, politically and socially.Lamy stressed that China has done a "remarkable job" in reducing poverty, which is an important task for the country, along with registering double-digit growth, thus becoming the world's largest manufacturer and the second largest economy.Apart from enhanced market access with its trading partners and more equal treatment in global trade, WTO membership also has allowed China to gain access to the organization's dispute settlement system, Lamy said.According to a WTO report issued in December, as the world's biggest exporter, China ranks first in receiving anti-dumping (AD) investigations, with 23 new AD initiations directed at its exports in the first half of 2010.In recent rulings arbitrated by the WTO Dispute Settlement Body (DSB), China has won a poultry dispute against the United States, and a steel fastener case against the European Union.Being a WTO member, "China would have a seat at the table as negotiations commenced on the trade rules for the 21st century," Lamy said, referring to the decade-long Doha round of global trade negotiations aimed at building the next generation trading system.Even more importantly, for China, participation in the global system of rules and discipline greatly boosted investors' confidence and helped facilitate foreign direct investment in China, he said.On the other side of the coin, China's integration into the world trading system has given enormous driving force to the global economy and market opportunity to its trade partners.

SAN FRANCISCO, May 4 (Xinhua) -- Intel Corp. on Wednesday announced that it will mass-manufacture chips using new transistors featuring a three-dimensional (3-D) structure, calling it a technical breakthrough in microprocessors.The 3-D transistor, called Tri-Gate, represents a fundamental departure from the two-dimensional planar transistor structure that has powered computers, mobile phones and other modern electronics, Intel said."Intel's scientists and engineers have once again reinvented the transistor, this time utilizing the third dimension," Paul Otellini, Intel's chief executive officer, said in a statement.Intel on Wednesday also demonstrated a 22-nanometer (nm) microprocessor, codenamed "Ivy Bridge," which will be the first high-volume chips to use the new 3-D transistors.Ivy Bridge is scheduled for high-volume production readiness by the end of this year, the company said.According to Intel, the 3-D transistors enable chips to operate at lower voltage with lower leakage compared to previous transistors, providing up to 37 percent performance increase at low voltage versus the company's 32nm planar transistors.The gain means that the new 3-D transistors are ideal for use in small handheld devices, which operate using less energy to " switch" back and forth, Intel noted.

CANBERRA, May 27 (Xinhua) -- An Australian student has discovered a part of the universe that astrophysicists have spent decades trying to find, Australia's Monash University on Friday confirmed in a statement.Astrophysicists have long thought the universe has a greater mass than is visible in the planets, but they had no way of proving it is there.Undergraduate student Amelia Fraser-McKelvie, 22, was on a summer internship at Monash University to learn more about astrophysics, when she managed to solve one of the big mysteries of science.Fraser-McKelvie, an aerospace engineering student, conducted a targeted X-ray search for the matter and found evidence of it within three months.Her tutor, Kevin Pimbblet, said the discovery is significant."We've been looking for this ordinary matter for a couple of decades," he said in a statement on Friday."It's been published in one of the most prestigious journals in the world, so astronomers all over the world will be able to read this article."Scientists had thought the matter would have a temperature of about 1 million degrees Celsius, 1.8 million degrees Fahrenheit, and should therefore be observable at X-ray wavelengths.Amelia Fraser-McKelvie's discovery has proved that prediction is correct, Pimbblet said.The trio published a research paper on the missing mass in one of the world's oldest and most prestigious scientific journals, Monthly Notices of the Royal Astronomical Society.He said the discovery could change the way telescopes are built.