Related topics: children

Pencil test for pipeline cracks

It is impossible to see when the "lead" in a pencil cracks within the pencil, but an acoustic sensor can "hear" the change in the way the pencil vibrates. Now, researchers in China have reported in the International Journal ...

Researchers explore the billiard dynamics of photon collisions

When one snooker ball hits another, both spring away from each other in an elastic manner. In the case of two photons, a similar process, the elastic collision, has never been observed. Physicists from the Institute of Nuclear ...

Simpler processing improves solar cells

By simplifying the process used to make a promising type of solar cell, A*STAR researchers have also improved the device's performance. The discovery may lead to better manufacturing methods for the commercialization of solar ...

EPA: No changes to federal lead water rule until next year

The Environmental Protection Agency's top water regulator said Wednesday that officials are working urgently to strengthen a federal rule limiting lead and copper in drinking water—a key focus in the ongoing lead-contamination ...

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