Engineering

Novel device promises lower operating costs for rail sector

Maintenance work on rail infrastructure costs the rail sector close to EUR 40 000 per kilometre of railway track. In fact, rail companies spend substantial amounts on repairing tracks and keeping them in good operating condition, ...

Energy & Green Tech

Good news for rooftop solar, not for home batteries

The energy produced over the lifetime of typical rooftop solar panels more than makes up for the energy it takes to make, mount and then eventually recycle them. But adding a home battery usually lowers those dividends, according ...

Engineering

Your body has internet—and now it can't be hacked

Someone could hack into your pacemaker or insulin pump and potentially kill you, just by intercepting and analyzing wireless signals. This hasn't happened in real life yet, but researchers have been demonstrating for at least ...

Energy & Green Tech

Why aren't there electric airplanes yet?

As electric cars and trucks appear increasingly on U.S. highways, it raises the question: When will commercially viable electric vehicles take to the skies? There are a number of ambitious efforts to build electric-powered ...

Energy & Green Tech

Does energy storage make the electric grid cleaner?

Carbon-free energy: Is the answer blowing in the wind? Perhaps, but the wind doesn't always blow, nor does the sun always shine. The energy generated by wind and solar power is intermittent, meaning that the generated electricity ...

Computer Sciences

Hybrid approach optimizes grid

The modern "smart" city, says Jie Liu, is a web of networks that should run like a healthy, well-tuned circulatory system.

page 2 from 4