Mixing Darks with Lights
Because most recycling centers don’t accept dark-colored plastics, more than four billion kilograms of car bumpers, cell phones and other materials clog U.S. landfills each year. Black plastic could easily be recycled. The problem: the polymers used in different plastics are incompatible, and melting them together yields an unusable glop. But the conventional plastic-identification method of analyzing reflected laser light doesn’t work well with black plastic, which chars under the bright beam.
SpectraCode of West Lafayette, IN, may have solved the problem. The key is a laser beam that hops around. The beam can be bright enough to produce an identifying signal rapidly; by dancing from point to point roughly every tenth of a second, it never dwells on one spot long enough to burn it. SpectraCode CEO Edward Grant expects the probe to be used in commercial products by early 2002.
Geoffrey Hinton tells us why he’s now scared of the tech he helped build
“I have suddenly switched my views on whether these things are going to be more intelligent than us.”
ChatGPT is going to change education, not destroy it
The narrative around cheating students doesn’t tell the whole story. Meet the teachers who think generative AI could actually make learning better.
Meet the people who use Notion to plan their whole lives
The workplace tool’s appeal extends far beyond organizing work projects. Many users find it’s just as useful for managing their free time.
Learning to code isn’t enough
Historically, learn-to-code efforts have provided opportunities for the few, but new efforts are aiming to be inclusive.
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