From the article:<p><pre><code> > By studying three homes’ smart-meter records, researchers at the
> University of Massachusetts were able to deduce not only how many
> people were in each dwelling at any given time but also when they
> were using their computers, coffee machines, and toasters. Incredibly,
> Kohno’s group at the University of Washington was able to use tiny
> fluctuations in power usage to figure out exactly what movies people
> were watching on their TVs.</code></pre>