Neural Networks

Neural Networks in JavaScript (by Heather Arthur)
https://github.com/harthur/brain

Neural Networks, the Human Brain and Learning
http://www.doc.ic.ac.uk/~nd/surprise_96/journal/vol2/cs11/article2.html

Google Research has open-sourced “word2vec”, an implementation of Deep Learning:
http://google-opensource.blogspot.com/2013/08/learning-meaning-behind-words.html

Google’s ‘word2vec’ in the press:
http://gigaom.com/2013/08/16/were-on-the-cusp-of-deep-learning-for-the-masses-you-can-thank-google-later/

Wikipedia:
http://en.wikipedia.org/wiki/Artificial_neural_network

Intuition:
http://www.dspguide.com/ch26/3.htm