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SAN FRANCISCO, Nov. 17 (Xinhua) -- Online retail giant Amazon is working on a smartphone scheduled to be released in the fourth quarter of 2012, U.S. media reported Thursday.A note from Citigroup analyst Mark Mahaney obtained by technology news site All Things Digital said that based on the supply chain checks in Asia, Amazon is believed to launch a smartphone in the fourth quarter of 2012.According to the note, Amazon is working with manufacturer Foxconn and the device will run Texas Instruments' OMAP 4 processor. The Kindle Fire, the latest tablet introduced by the e- commerce giant, also uses OMAP processor.The analyst said the smartphone will cost Amazon between 150 and 170 U.S. dollars to build and the company could sell the handset at or near its cost rather than a 30 percent gross margin like many other smartphone manufacturers usually do.The move is expected to further intensify Amazon's rivalry with Apple and Google after the e-commerce giant had made moves on some booming businesses like tablet computer and cloud-computing service.

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. 1 (Xinhua) -- State Grid Corporation of China (SGCC), the country's largest power supplier, said Sunday it has put to trial operation a cross-border electricity transmission project in northeastern Heilongjiang province to supply Chinese with Russia's electric power exports.The electric power SGCC purchased from Russia began reaching Chinese customers late Saturday night after the completion of the direct-current back-to-back networking substation, or called "the trans-Amur project" by Russians, SGCC said in a statement on its website.The trial operation will last 168 hours, SGCC said in the statement.With a transmission capacity of 750 mega-watts, the electricity transmission project is China's biggest cross-border power line, according to SGCC."The implementation of the project will gain experience for the expansion of Sino-Russian energy cooperation and help promote the economic development for both countries," SGCC said.The project is also part of the Sino-Russian energy and trade cooperation.Russian Deputy Energy Minister Andrei Shishkin said in June 2011 that the transmission project would increase Russia's power supply to five or six billion kilowatt hours of electricity to China and Russia intended to increase its electricity supply to China in the coming years.Russian companies plan export 60 billion kwh of electricity to China by 2020. Power plants will be built along its border with China to reduce power transmission losses and reduce transportation costs.Also on Sunday, an oil pipeline linking Russia's far east and northeast China witnessed its one year anniversary of operation, as operators announced an accumulated 15 million tonnes of oil had been transported into China in 2011.

UNITED NATIONS, Jan. 24 (Xinhua) -- China welcomes and supports all efforts and measures that would break the current deadlock of the Palestinian-Israeli negotiation and relaunch their dialogues, Chinese UN ambassador Li Baodong said here Tuesday.Li made the remarks when addressing a Security Council monthly open debate on Middle East."The Middle East peace process is currently in a stalemate. China is deeply concerned over the development," Li said."We always maintain that the parties concerned should resolve their disputes through political negotiations under the relevant UN resolutions, the principle of 'land for peace,' the Arab Peace Initiative and the Middle East Roadmap for Peace with the goal of ultimately establishing an independent Palestinian state and two states,Palestine and Israel, living side by side in peace," he said. China appreciates the efforts made recently by Jordan and Quartet of Middle East to facilitate the two parties to have direct contact, said Li, adding "We hope the relevant peace promotion efforts will help resume the Palestinian-Israeli peace negotiation sooner and achieve substantive result. China supports a greater role of the UN in resolving the Middle East issue."Calling the Israeli settlement "a major obstacle" for the resumption of Palestinian-Israel peace negotiation, Li said China is seriously concerned about the recent approval by the Israeli government of plans for expansion of new settlements."China is always against Israeli establishment of Jewish settlements in the occupied Palestinian territory including East Jerusalem. We urge Israel to cease the settlement construction immediately, be prudent in action and work actively in collaboration with the efforts of the international community to promote peace, and create conditions for the resumption Palestinian-Israeli peace negotiation," the ambassador said.China has always supported the Palestinian people in their just cause to restore the lawful rights of the nation, and maintained that establishment of an independent state is the lawful right of the Palestinian people as the basis for the implementation of the "two-state solution""China supports the establishment of an independent Palestinian state that enjoys full sovereignty, with East Jerusalem as its capital and based on the 1967 border. China supports Palestine's membership in the United Nation," Li said.The Syria-Israel track and the Lebanon-Israel track are important component of the Middle East peace process, and play an indispensable role in the overall settlement of the Middle East issue, Li said.China firmly supports the just cause of Syria and Lebanon to maintain sovereignty and territorial integrity, and recover their occupied territoriesChina supports the strategic choice made by Arab states in their pursuit of a comprehensive and lasting peace in the region, Li added.He also called on relevant parties to keep constrained, avoid the escalation of tension in Gaza, effectively implement relevant UN resolutions and fully lift the Gaza blockade.

WASHINGTON, Jan. 2 (Xinhua) -- A hormone derived from visceral fat called adiponectin may play a role as a risk factor for development of all-cause dementia and Alzheimer's disease (AD) in women, according to a study published on Monday in online issue of the Archives of Neurology.Thomas van Himbergen, from Human Nutrition Research Center on Aging at Tufts University, and colleagues measured levels of glucose, insulin, and glycated albumin, as well as C reactive protein, lipoprotein associated phospholipase A2, and adiponectin in the plasma of patients at the 19th biennial examination (1985 -- 1988) of the Framingham Heart Study.The 840 patients (541 women, median age of 76 years) were followed-up for an average of 13 years and evaluated for signs of the development of AD and all-cause dementia. During that time, 159 patients developed dementia, including 125 cases of AD. After adjustment for other dementia risk factors (age, low plasma docosahexaenoic acid, weight change) only adiponectin in women was associated with an increased risk of all-cause dementia and AD."It is well established that insulin signaling is dysfunctional in the brains of patients with AD, and since adiponectin enhances insulin sensitivity, one would also expect beneficial actions protecting against cognitive decline," the authors write. "Our data, however, indicate that elevated adiponectin level was associated with an increased risk of dementia and AD in women."