A text-mining system must go way beyond indexing and search to appear truly intelligent. First, it should understand language beyond keyword matching (for example, distinguishing between “Jane has the flu,” “Jane may have the flu,” “Jane is concerned about the flu," “Jane’s sister has the flu, but she doesn’t,” or “Jane had the flu when she was 9” is of critical importance). This is a natural language processing problem. Second, it should “read between the lines” and make likely inferences even if they’re not explicitly written (for example, if Jane has had a fever, a headache, fatigue, and a runny nose for three days, not as part of an ongoing condition, then she likely has the flu). This is a semisupervised machine-learning problem. And third, it should automatically learn the right contextual inferences to make (for example, learning on its own that fatigue is (sometimes) a flu symptom—only because it appears in many diagnosed patients—without a human ever explicitly stating that rule). This is an association-mining problem, which can be tackled via deep learning or via more guided machine-learning techniques.
David Talby and Claudiu Branzan offer a live demo of an end-to-end system that makes nontrivial clinical inferences from free-text patient records and provides real-time inferencing at scale. The architecture is built out of open source big data components: Kafka and Spark Streaming for real-time data ingestion and processing, Spark for modeling, and Titan and Elasticsearch for enabling low-latency access to results. The data science components include a UIMA pipeline with custom annotators, machine-learning models for implicit inferences, and dynamic ontologies for representing and learning new relationships between concepts. Source code will be made available after the talk to enable you to hack away on your own.
David Talby is a chief technology officer at Pacific AI, helping fast-growing companies apply big data and data science techniques to solve real-world problems in healthcare, life science, and related fields. David has extensive experience in building and operating web-scale data science and business platforms, as well as building world-class, Agile, distributed teams. Previously, he was with Microsoft’s Bing Group, where he led business operations for Bing Shopping in the US and Europe. Earlier, he worked at Amazon both in Seattle and the UK, where he built and ran distributed teams that helped scale Amazon’s financial systems. David holds a PhD in computer science and master’s degrees in both computer science and business administration.
Claudiu Branzan is the director of data science at G2 Web Services, where he designs and implements data science solutions to mitigate merchant risk, leveraging his 10+ years of machine learning and distributed systems experience. Previously, Claudiu worked for Atigeo building big data and data science-driven products for various customers.
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