Moving Cells with Sound
Biomedical engineers at the University of Michigan are testing “acoustic tweezers” that use ultrasound waves to gently shuttle cells around. The cells are grown on a polymer that turns pulsed laser light into high-frequency vibrations; the vibrations heat the polymer slightly, and it responds by expanding. Projecting a pulsing ring of laser light around a cell deforms the underlying polymer into a tiny hill, and the cell slides down its slope. Moving the laser nudges the cell in any direction. One advantage of the technique over other cell manipulation schemes is that the process can be reversed and an isolated cell returned to its place in the cell culture. Project leaders Matt O’Donnell and Tak Buma hope to initially license the technology to drug companies. Drug researchers could quickly isolate liver cells, say, treat them with potential drugs, and return them safely to their cultures to see if they suffer any toxic effects.
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.”
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.
Deep learning pioneer Geoffrey Hinton has quit Google
Hinton will be speaking at EmTech Digital on Wednesday.
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