30 karma · joined August 20, 2014
I was thinking of trying to make a smartphone-powered ultrasound awhile back and looked into it, and these devices don't look too complicated. You put a piezo in a little box, and cycle it to send/receive vibration in the form of sound. The software to decode the signal into an image is the hard part. But if it's Rothberg behind this...well, I'll take his word for it being a hard thing to make low-cost.
What's troubling about them is the exploitation of the student athletes; the ones that make money give a lot back to the university as a whole.
"The notion that someone would market a closet that could never be opened – even if it involves a case involving a child kidnapper and a court order – to me does not make any sense."
The underlying idea is sound; deep brain stimulation, which this is sort of analogous to, is a surprising if short-lived panacea to a wide range of conditions. Applied randomly it's as likely to exacerbate a negative effect as it is to treat one, but it is generally performed by a trained neural surgeon while the patient reports on how well it's working, and it doesn't last too long anyways.
TDCS is like deep brain stimulation in that it applies a current to your brain, but the effect borders on homeopathic. It's imprecise, the charge is (happily) too weak to bring about any real change in the brain from the scalp, and I doubt it's anything more than a placebo, best case.
You're absolutely right; this study is neither novel nor groundbreaking.
On the sending side, forget 90%, success rates of 99% are easy to achieve with some types of BCI systems such as SSVEP or P300. As for the information detected, you might have heard of the P300 speller[1] which demonstrated an easy way to accurately spell out words using a BCI headset.
On the receiving side we see why they opted for binary communication. The 'telepathy' was nothing more than a flash of light being visible for a value of '1', achieved by blasting a region of the brain associated with vision with magnetic fields about as strong as an MRI. That sounds cool, but it is a technique that has been in use for over a decade[2].
So tl;dr, what these researchers have achieved is essentially stringing together two or three decades-old technologies in a not terribly original way.
[1]: http://www.cortechsolutions.com/Applications/Brain-Computer-... [2]: http://brain.oxfordjournals.org/content/125/3/479.long
But, and this is pretty annoying, a lot of the documentaries and stories that they play are not new and used to be available, along with a live stream of the channel, on their website. There's nothing wrong with recycling the content; that stuff takes awhile to make and demanding new editions every day is a big part of what made the 24-hour news cycle into what it is today. But now that I've cut the cord I do miss their coverage.
Anyways, AJ is a solid news channel so I wouldn't be too too upset about the acquisition.