Q&A With: Ecologist and Geoengineering Expert Philip Boyd

Ecologist Philip Boyd says we need to figure out the benefits and risks of geoengineering now

4 min read

A number of geoengineering schemes have been percolating throughout the scientific community and the media as potential solutions to climate change. Warming could be slowed by injecting sulfur into the atmosphere to reflect sunlight. Adding iron to the ocean could promote algal blooms that would help sequester carbon dioxide. Giant mirrors could reflect light away from Earth.

In an essay in this week’s Nature Geoscience, phytoplankton ecologist Philip Boyd, at the National Institute of Water and Atmospheric Research, in New Zealand, urged the scientific community to seriously evaluate these geoengineering schemes and toss out the clear losers.

Keep Reading ↓Show less

This article is for IEEE members only. Join IEEE to access our full archive.

Join the world’s largest professional organization devoted to engineering and applied sciences and get access to all of Spectrum’s articles, podcasts, and special reports. Learn more →

If you're already an IEEE member, please sign in to continue reading.

Membership includes:

  • Get unlimited access to IEEE Spectrum content
  • Follow your favorite topics to create a personalized feed of IEEE Spectrum content
  • Save Spectrum articles to read later
  • Network with other technology professionals
  • Establish a professional profile
  • Create a group to share and collaborate on projects
  • Discover IEEE events and activities
  • Join and participate in discussions

From WinZips to Cat GIFs, Jacob Ziv’s Algorithms Have Powered Decades of Compression

The lossless-compression pioneer received the 2021 IEEE Medal of Honor

11 min read
Vertical
Photo of Jacob Ziv
Photo: Rami Shlush
Yellow

Lossless data compression seems a bit like a magic trick. Its cousin, lossy compression, is easier to comprehend. Lossy algorithms are used to get music into the popular MP3 format and turn a digital image into a standard JPEG file. They do this by selectively removing bits, taking what scientists know about the way we see and hear to determine which bits we'd least miss. But no one can make the case that the resulting file is a perfect replica of the original.

Not so with lossless data compression. Bits do disappear, making the data file dramatically smaller and thus easier to store and transmit. The important difference is that the bits reappear on command. It's as if the bits are rabbits in a magician's act, disappearing and then reappearing from inside a hat at the wave of a wand.

Keep Reading ↓Show less