1. ?

2. http://FlockThink.com
A twitter search engine with sentiment analysis

3. About the Algorithm
Python, MongoDB - ~5M tweets with
variations on :) and :(
• Tokenize all usernames/urls
• Remove tweets <4 words and <75%
English
• Use bigrams and trigrams
• Scikit-learn with Naive Bayes
algorithm (81% accuracy)
Tools:

4. Keoki Seu
Ph.D. Experimental Physics (W&M) ultrafast magnetism
Postdoc (Berkeley) coherent x-ray scattering

5. Threshold False Positive Rate True Positive Rate
0.33 0.375 0.920
0.66 0.0704 0.6143