Researchers from the University of California, Berkeley and San Francisco have developed a brain-computer interface that translates brain activity into speech with a minimal delay. In a study published in Nature Neuroscience, they reduced the lag from 8 seconds to just 1 second. The device was tested on a 47-year-old woman with quadriplegia, who previously communicated using a Tobii Dynavox at a rate of 14 words per minute. With the new device, her speech rate increased to a median of 47.5 words per minute, reaching 90 words per minute with a vocabulary of 50 words. The system uses an array of electrodes placed on the motor cortex to capture brain signals every 80 milliseconds. These signals are then decoded into speech using AI. The study, conducted from 2022 to 2024, marks a significant advancement in real-time communication for individuals with severe paralysis.
New Scientist
@newscientist
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Apr 4 Atomic clocks record time using microwaves, they are the basis upon which a second is defined. But there’s a new kid on the block, the optical clock, which boasts an even higher level of accuracy. Is it time to redefine the second?
Read more: https://newscientist.com/article/mg26635372-500-the-epic-quest-to-redefine-the-second-using-the-worlds-best-clocks/…
Science Magazine
@ScienceMagazine
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Feb 13 New research in Science represents a notable step forward in designing enzymes from scratch.
With a new approach, researchers designed an enzyme that uses a covalent intermediate to catalyze a two-step reaction, analogous to what many proteases do when breaking apart proteins.
David Ullrich
@DavidUllrich202
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Apr 2 The epic quest to redefine the second using the world’s best clocks
A more precise definition of the second is crucial to all sorts of physical measurements ― but to get there, scientists have to pack up their extraordinarily fragile optical clocks and take them on tour
New Scientist
@newscientist
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Apr 2 A more precise definition of the second is crucial to all sorts of physical measurements – but to get there, scientists have to pack up their extraordinarily fragile optical clocks and take them on tour.
Vindruva
@Vindruva_
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Apr 6 iirc
@bozzrm
discovered it some time ago. You can scan people as if the second scanline was still here. You have to pull up your radar when the survivor would cross it. There is another condition that we can’t figure out cause we can’t get it consistently
William Huo
@wmhuo168
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Apr 5 The breakthrough comes from using two-dimensional materials—graphene and molybdenum disulfide (MoS₂)—instead of conventional bulk silicon. 3/12
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