Energy-harvesting design aims to turn Wi-Fi signals into usable power

Device for harnessing terahertz radiation might enable self-powering implants, cellphones, other portable electronics.

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Any device that sends out a Wi-Fi signal also emits terahertz waves — electromagnetic waves with a frequency somewhere between microwaves and infrared light.
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Society needs electrical engineers to function. Here's how you can become one.

Learn to understand the foundations of modern life and even launch a new career.

  • Electrical engineering is the study, design, and application of systems that utilize electricity and electronics.
  • Modern applications include power grids, telecommunications, and circuit boards.
  • Computing systems such as supercomputers and tablets rely on electrical engineering.
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New nuclear fusion reactor design may be a breakthrough

Using permanent magnets may help to make nuclear fusion reactors simpler and more affordable.

Credit: C. Zhu/PPPL
  • Nuclear fusion is the process of fusing atomic nuclei, which can unleash vast amounts of energy.
  • Nuclear fusion reactors have existed for years, but none of them are able to sustainably produce energy.
  • A new paper describes how permanent magnets can be used on stellarators to control the flow of super-hot plasma.

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Study: Lifestyles of the wealthy are to blame for climate change

As it turns out, people who can afford to fly all the time use more energy than anybody else.

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  • The rich use much more energy per person than the poor do.
  • This holds up no matter where you go.
  • The findings suggest that, as the global poor gain wealth, strategies to keep emissions and energy use down will have to aim at several areas of consumption.
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This fruit reeks, but it may one day power your phone

Ever smell a durian fruit? Don't. Think of it as nature's stinky battery.

Image source: JohnWick2/Shutterstock
  • New research finds that jackfruit and durian, often called the world's smelliest fruit, make outstanding supercapacitors.
  • Supercapacitors are useful because they can be used as infinitely rechargeable batteries.
  • The study, published in the Journal of Energy Storage, also demonstrates the development of carbon aerogels for the bodies of the fruit batteries.
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