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SAN FRANCISCO, June 15 (Xinhua) -- As social networking sites like Facebook and Twitter grow worldwide, more Internet retailers are beefing up their efforts to add social twists to their business, trying to define the idea of "social commerce" and capitalize the opportunity.On Wednesday, online auction giant eBay revealed some of the social features it is planning to launch later this year, while Copious, a San Francisco-based startup, launched its online social commerce marketplace with a slogan of "buying from and selling to people, not strangers."Copious asks users to log in through their Facebook accounts and allows buyers and sellers to see if they have friends in common in their social networking sites. Buyers can see more information about a seller and also see whether anyone in their networks has purchased, shared or commented on an item from a specific seller, rather than anonymity or simple profiles on sites like eBay and Craigslist.As for sellers, Copious has a social pricing mechanism that enables a seller to offer buyers discounts for sharing listings on Facebook and for following the seller on Copious.Jonathan Ehrlich, Copious co-founder and former Facebook head of marketing, told technology blog TechCrunch that the site is centralized around using social data as a signal to help users understand and trust other parties.According to Copious, the startup founded in January 2011 has raised two million U.S. dollars in funding from Foundation Capital, Google Ventures, Blackberry Partners Fund and a number of Silicon Valley angel investors.Also on Wednesday, Christopher Payne, vice president and head of eBay North America, delivered a keynote speech at the Internet Retailer Conference and Exhibition 2011 in San Diego, revealing some features eBay is launching during the social trend.One feature will enable users to log in their Facebook account on eBay's homepage to get product recommendations based on one's purchasing history and things they have "liked" on their Facebook page. Another feature will allow users to post multiple products on their Facebook page to get their friends' opinions and ask them to vote for the final purchase.EBay has been stepping up its social efforts, and Payne said on Wednesday that social is a top-level initiative for Internet retailers. Last month, eBay hired former Yahoo executive Don Bradford to lead its social commerce efforts. Last November, it launched Group Gifts service, enabling users to chip in to buy a gift for someone.A research by Adgregate Market in March showed that more brand websites are losing traffic to their Facebook pages. The study revealed that the "Facebook stores" of most Internet retailers are more efficient at acquiring visitors, indicating social commerce is poised to take off.Although the idea of social commerce is still new, more companies are trying to seize the opportunity in their own moves.There are many other companies taking the social commerce model. Oodle, the exclusive provider of classified ads on the Facebook Marketplace, rolled out a series of social features last December to make more money from social classifieds.In February, Payvment Inc. launched a Facebook Mall, where consumers can shop for more than 1.2 million products among 60,000 retailers in a single shopping cart.Yardsellr, which is often called "an eBay for Facebook," allows sellers to list items at fixed prices in different categories called "blocks," such as jewelry and purses. Prospective buyers can "like" the "blocks" they are interested in on the Yardsellr website or its Facebook page, and then they will get Facebook news feed if a seller has something to offer in the category.Yardsellr said 1.5 million people were following its "blocks" by late December 2010 and the number of new followers is growing by 20,000 daily.

BEIJING, July 5 (Xinhuanet) -- A black iPhone 4 prototype has appeared for sale on eBay and the highest bidding hit one million U.S. dollars as of Monday, according to media reports.The listing is set to expire on July 11.The seller "jtmaxo" said, "I am a licensed cell phone repairman, this iPhone was bought from a person who really didn't know who he had."The seller later was frustrated to find that it was unable to be activated via iTunes.According to a check through Apple’s database, it is indeed listed as a prototype, and it has the tester code "DF1692" etched in the bottom right corner.Different from the iPhone 4 sold on markets, the handset lacks the + and - on the volume buttons, although the screen is fully functional.The price for the prototype will not remain as high as it is as the seller said that several "non-legitimate" bids have already been deleted.

WASHINGTON, Sept. 15 (Xinhua) -- A team of researchers has discovered a planet that orbits around a pair of stars, the U.S. space agency NASA announced Thursday.This is the first instance of astronomers finding direct evidence of a so-called circumbinary planet. A few other planets have been suspected of orbiting around both members of a dual-star system, but the transits of the circumbinary planet have never been detected previously.The team, led by Laurance Doyle of the SETI Institute in California, used photometric data from the NASA Kepler space telescope, which monitors the brightness of 155,000 stars.NASA's Kepler mission has discovered a world where two suns set over the horizon instead of just one. The planet, called Kepler-16b, is the most "Tatooine-like" planet yet found in our galaxy. Tatooine is the name of Luke Skywalker's home world in the science fiction movie Star Wars. In this case, the planet it not thought to be habitable. It is a cold world, with a gaseous surface, but like Tatooine, it circles two stars.They found the binary star system by detecting a system where the stars eclipsed each other from the perspective of the Kepler spacecraft. These stars have two eclipses: A primary eclipse when the larger star is partially blocked by the smaller star and a secondary eclipse where the smaller star is fully blocked by the larger star.But the researchers also noticed other times when the brightness of the two stars dropped, even when they were not in an eclipse position. This pattern suggested that there was likely a third object involved. The fact that these so-called tertiary and quaternary eclipses recurred after varying intervals of time, and were of different depths, indicated that the stars were in different positions in their orbit at each instance. This result showed that the tertiary and quaternary eclipses were being caused by something circling both stars, and not an object circling one or the other star.Measurements of the variations in the timing of all four types of eclipses, resulting from the mutual gravitational interactions of the two stars and the third body, demonstrated that the third object was, indeed, a planet. Their work indicates that the planet is less massive than Jupiter, possibly comparable in mass to Saturn, and that the larger of the two binary stars is smaller than our Sun.Their findings will be published Friday in Science."This discovery confirms a new class of planetary systems that could harbor life," Kepler principal investigator William Borucki said in a statement. "Given that most stars in our galaxy are part of a binary system, this means the opportunities for life are much broader than if planets form only around single stars. This milestone discovery confirms a theory that scientists have had for decades but could not prove until now."

RIO DE JANEIRO, Sept. 26 (Xinhua) -- Rio de Janeiro has the highest level of air pollution in Brazil, and is more polluted than many other world metropolis like New York, London and Paris, a World Health Organization (WHO) study said Monday.According to the study, which was carried out in 91 countries and regions, the air in Rio's metropolitan area contains 64 micrograms of fine particulate matter per cubic meter, over three times the upper limit set by the WHO, which is 20 micrograms per cubic meter.Despite being larger, having a bigger population and more vehicles, Sao Paulo's metropolitan area has less air pollution, with 38 micrograms of fine particulate matter per cubic meter.According to the WHO, "the largest contributors to urban outdoor air pollution include motor transport, small-scale manufacturers and other industries, burning of biomass and coal for cooking and heating, as well as coal-fired power plants." The organization said that residential wood and coal burning for heating also help increase air pollution, especially in rural areas in the cold months.The WHO expressed concern over air pollution levels in several cities, as some two million people worldwide die annually from conditions resulting from air pollution."Air pollution is a major environmental health issue, and it is vital that we increase efforts to reduce the health burden it creates," said Dr. Maria Neira, WHO's director for Public Health and Environment.According to the study, Ahwaz, Iran, has the most polluted air in the world, with 372 micrograms of fine particulate matter per cubic meter.

UNITED NATIONS, June 8 (Xinhua) -- Marking 30 years of the HIV- AIDS pandemic, scores of heads of state and government and ministers took to the UN General Assembly podium on Wednesday to list their country's accomplishments and list challenges in the battle.The General Assembly High Level Meeting on AIDS is taking place 10 years after the UN Special Session on HIV/AIDS and also marks five years since signing of the Political Declaration in which UN member states committed to moving towards universal access to HIV prevention, treatment, care and support.UN Secretary-General Ban Ki-moon UN recalled how three decades ago AIDS was spreading while "Today, we have a chance to end this epidemic once and for all."Now, instead of fear, there is hope, he said."Today, HIV is on a steep decline in some of the most affected countries. Countries like Ethiopia, South Africa, Zambia and Zimbabwe," he said. "They had the largest epidemics in the world, and they have cut infection rates by one quarter.""Globally, more than 6 million people now get treatment," Ban said. "All of these advances come thanks to you and the commitments you made, first 10 years ago and then again in 2006. Today, the challenge has changed. Today, we gather to end AIDS."However, President Joseph Deiss of the General Assembly said 10 million people still have no access to treatment and far too many people were still being infected, adding it was necessary to continue complementary and closely-linked prevention, treatment, care and support measures."We have reached a critical moment in time," he said. "We must take a holistic approach and integrate the response to AIDS into broader development programs."Michel Sidibe, executive director of the Joint UN Program on HIV/AIDS (UNAIDS), recalled how 30 years the disease was called the gay plague and slime disease. People were afraid of each other and there was no hope."This image should not disappear. It is part of our history," he said.Sidibe said the AIDS movement was the story of a people breaking the conspiracy of silence, demanding equity and dignity, confronting societies'wrongs, seizing their rights, and making a passionate call for social justice. Since then, a compact had been made between the global North and the South, which had produced lifesaving results.Now, More than 6.6 million people are being treated in low- and middle- income countries, he said, pointing out that since the initial success stories in Uganda and Thailand 56 countries, including 36 in Africa, have been able to stabilize the epidemic and reduce the number of infections significantly.Infections have been reduced by 35 percent in South Africa and by more than half in India, the UNAIDS chief said. In China, the HIV mortality rate had fallen by 64 percent, Sidibe said. Many other countries had reached universal access to treatment.He voiced what was repeated several times, and that was a call for "a transformational agenda" of "zero infections, zero discrimination and zero AIDS-related deaths."To put a personal face on the disease, a woman from Ukraine openly living with HIV, Tetyana Afansiadi, told her story to the delegates.She told how she had been living with HIV and using drugs for 13 years, had hepatitis C for almost 11 years but now has a husband and an 8-year-old son. Neither have HIV.Three years ago she took part in a drug therapy program that has enabled her to live, work, and take care of her son."Drug dependency and HIV-infection require treatment, not prosecution," she said.Given that opioid substitution therapy in her home city had changed the lives of people like her, it was time to stop refusing antiretroviral treatment to people who used drugs.While the heads of states and government and ministers, usually those heading up health departments, spoke in the General Assembly hall under bright lights, scores more of delegates attended five panel sessions and about 40 individual side events.Some samplings from the spotlighted dark-green podium in the great hall:President Paul Kagame of Rwanda, said, "It is time to galvanize member states to commit to a transformative agenda that overcomes the barriers to an effective, equitable and sustainable response to HIV and AIDS."Jose Angel Cordova Villalobos, health minister of Mexico, called for states to implement friendly, non-discriminatory healthcare systems as well as sex education in order to prevent the spread of HIV/AIDS."To achieve this, we call to all the countries congregated here today in order that your actions are based in the framework of respect to the human rights and focusing on gender equity, that allow to consolidate an effective response to the HIV/AIDS without stigmas, discrimination, homophobia, transphobia; as well as any type of violence," he said, referring, in part, to transsexuals.The vice president of Mauritius, Monique Bellepeau, said, "The adverse impact of the AIDS epidemic on the socioeconomic progress, particularly in the developing countries, dictates that there is no time for complacency."She added, "After wrestling with AIDS for the past three decades, we are today equipped with a vast body of knowledge and various new tools to urgently complete the task. No less than strict prevention efforts and universal access to treatment, care and support are required."The speeches continue Thursday and on the final day of the three-day meeting, UN member states are expected to adopt a declaration to guide country responses to HIV over the next five years.