- <meta name="Description" content="Personal home page of Chris Mattmann, Chief Architect and Principal Data Scientist at the NASA Jet Propulsion Laboratory, and Director of Information Retrieval and Data Science Group and Adjunct Research Professor in the Computer Science Department within the University of Southern California's Viterbi School of EngineeringThe IRDS mission is to research and develop new methodology and open source software to analyze, ingest, process, and manage Big Data and to turn it into information. We contribute to the world’s largest and most often downloaded open source software projects, we apply tried and true techniques including content detection and analysis, crawling, deduplication, similarity, named entity recognition, construction of inverted indices, query analysis, search, relevancy and ranking, interactive query analysis, and management of large data sets. We have expertise in data collection, working with NASA, DARPA, DHS, NIH across a number of domains, Earth Science, Planetary Science, Astronomy, defense, and private industry.">
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