NLP LDA related links

Natural language processing https://en.wikipedia.org/wiki/Natural_language_processing

Apache cTakes http://ctakes.apache.org/examples.html

Snowmed Info http://systems.hscic.gov.uk/data/uktc/snomed

Powered by Apache UIMA https://cwiki.apache.org/confluence/display/UIMA/Powered+by+Apache+UIMA

Latent Dirichlet allocation https://en.wikipedia.org/wiki/Latent_Dirichlet_allocation

Latent variable (Variables which are inferred and not observed) https://en.wikipedia.org/wiki/Latent_variable

Probabilistic latent semantic analysis https://en.wikipedia.org/wiki/Probabilistic_latent_semantic_analysis

Bag-of-words model https://en.wikipedia.org/wiki/Bag-of-words_model

Explanation of LDA https://www.quora.com/What-is-a-good-explanation-of-Latent-Dirichlet-Allocation

Towards a semantic lexicon for clinical natural language processing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3540492/

MedTagger User Guide http://ohnlp.org/index.php/MedTagger_User_Guide

Hadoop Tutorial http://www.tutorialspoint.com/hadoop/

Apache Spark Tutorial http://www.tutorialspoint.com/apache_spark/

Event Drops Timeline: https://github.com/marmelab/EventDrops