The technology helped after Japan's earthquake, but the buoy system is often unreliable.
Engineers struggle to keep reactors cool after explosions and radiation leaks.
The world's only earthquake warning system likely helped limit damage and loss of life.
The best of the rest from the Physics arXiv this week:
Killing off one sacrificial species can prevent extinctions spreading through ecosystems, according to the predictions of network theory.
Updated: An advisory panel for the FDA recommends that some genetic tests require the involvement of health care providers.
In the U.S., the only things standing between democracy and election fraud are a few pieces of adhesive tape.
A single atom of rubidium sits at the heart of an exotic new quantum memory device.
When professional football teams pick players during the draft, uncertainty could be a greater factor than skill.
A small number of randomly selected legislators should make parliaments more effective, say a group of IgNobel prize-winning scientists.