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(PhysOrg.com) -- A new mechanism will make it possible to switch data storage in the future.

We hear a lot about PTSD these days, and with good reason. As more people confront trauma and come away with severely debilitating disorders, it becomes that much more important to understand the mechanism, in order to find ways to treat or prevent it. And one of the ways people are seeking to understand PTSD is by trying to find genetic risk factors for the disorder, in the hope that familial traits will be able to predict who might develop PTSD and who might not, allowing for preventative treatments before exposure, and better treatments after trauma.

Crime, congestion and pollution mar all cities, from Los Angeles to Mumbai. But another force trumps the drawbacks of urban living: cities bring opportunities for wealth and for the creative inspiration that can result only from face-to-face contact with others.

New advances in steel nanoparticles may lead to cars that are lighter (and thus faster and more fuel efficient) than those made with conventional materials, but just as safe in a crash.

UNITED NATIONS -- They are the carbon offsetting projects most hated by environmentalists, but there may now be an opportunity to put an end to them. Currently, there are five coal-fired power plants registered as emission reduction projects under the Clean Development Mechanism (CDM), an international offsetting program run by an arm of the United Nations. Pressure from developing nation governments led to their inclusion in the program, as supporters claim the newer supercritical coal plants avoid carbon dioxide emissions by preventing dirtier plants from being built instead.

The debate over the mechanism that causes superconductivity in a class of materials called the pnictides has been settled by a research team from Japan and China.

1. After its extended cloud services failure, Amazon's Web Services system is cranking back to life , bringing some of the web's big-names with it.