The December 2022 issue of IEEE Spectrum is here!

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The Cleantech Open crowned EcoFactor, an entrant in the Smart Power category from California, as winner of the 2009 Cleantech Open, a business competition created to find, fund, and foster startup clean technology companies. EcoFactor has designed a software system that communicates with home thermostats to reduce energy use. EcoFactor won $250,000 in cash and services.

The competition also honored two runners-up; Alphabet Energy, a waste-heat recapture venture, and my personal favorite, MicroMidas, a company with technology to transform sewage into plastic.

The Open itself was limited to the entries from California, the Rocky Mountain Region, and the Pacific Northwest. However, a separate, parallel competition, run with the help of the Kauffman Foundation, offered a prize of $100,000 in services to entries from around the world. The winner in this, the Global Cleantech Open Ideas competition, was Replenish Energy of Puerto Rico, a company that uses micro algae as a source of fuel.

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The Transistor at 75

The past, present, and future of the modern world’s most important invention

2 min read
A photo of a birthday cake with 75 written on it.
Lisa Sheehan
LightGreen

Seventy-five years is a long time. It’s so long that most of us don’t remember a time before the transistor, and long enough for many engineers to have devoted entire careers to its use and development. In honor of this most important of technological achievements, this issue’s package of articles explores the transistor’s historical journey and potential future.

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