console.log(brain)
Armagan Amcalar
Amsterdam JSNation
June 1st, 2018
Who am I?
Armagan Amcalar
Head of Software Engineering @ unu GmbH
Founder @ Lonca Works
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AUTHORED ON GITHUB
what is
the ultimate hack?
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The Summit 2013 - Picture by Dan Taylor / Heisenberg Media - www.heisenbergmedia.com
“I think we are about 8 to 10 years away from this being usable by people with no disability”
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Facebook VP of Engineering Regina Dugan F8 - Picture by Anthony Quintano
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A PRIMER: The world's first EEG recording
... in 1924, from experiments by Hans Berger
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How it looks now
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Actually...
Let me show you.
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How does this black magic work?
100 billion neurons
Chemical reactions of K & Na exchange produce potential difference > "action potential"
Up to 256 electrodes for non-invasive methods
Thousands of electrodes for invasive operations
... and we still don't know how it exactly works.
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P300 — oddball paradigm
First published by E. Donchin and L.A. Farwell in 1988
2.3 letters / min
Based on randomly flashing letters in a matrix
Rare positive, common negative flashes pique interest
Action potentials fire 300ms after stimulation
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Separate Black from red
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WHERE DO I START?
Available on GitHub: https://github.com/dashersw/wits
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BRAIN-MONITOR
Available on GitHub: https://github.com/dashersw/brain-monitor
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Open-source P300 speller
that still needs some help!
brain-bits
Available on GitHub: https://github.com/dashersw/brain-bits
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Tech stack
JavaScript all the way up
Native C add-ons for the headset
Node.js for processing
Electron as the wrapper
Vue.js for front-end
brain.js for neural networks
Custom BLDA in JS as another classifier
...and, MATLAB as the server for eig function.
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Formatting the data for Machine Learning
- Get raw electrode data
- Group by each second to get epochs
- Filter each epoc between 1-12Hz
- Winsorize data
- Zero-mean normalization
- Decimate by 8
- Apply machine learning
- Use brain.js for neural networks
- Use a custom algorithm for BLDA
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Conclusion
JavaScript is powerful enough to read and parse not only JSON APIs,
but also your brain’s API.
thank you!
Let's keep in touch!
Armagan Amcalar
