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Combining a Knowledge Graph and Graph Algorithms to Find Hidden Skills at NASA

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Combining a Knowledge Graph and Graph Algorithms to Find Hidden Skills at NASA

  1. 1. National Aeronautics and Space Administration www.nasa.gov KSATT - Knowledge, Skills, Abilities, Tasks and Technology David Meza Sr. Data Scientist Office of the Chief Human Capital Officer 1 Combining Knowledge Graphs and Algorithms to Find Hidden Skills
  2. 2. HR Executives Say Skills Most Important 2
  3. 3. Enterprise Knowledge Graphs • Enterprise Knowledge Graphs help companies create their specific web of knowledge representing their very own domain. As a result, they can seamlessly break down data silos to use information assets in an agile way. • Brings together structured and unstructured data • Speedier search enabling faster decisions • Can connect knowledge graphs across domains • Algorithms (NLP) • Text annotation • Knowledge graph enrichment – Path Finding, Centrality, Community Detection • Text rank • Similarity • Sentiment analysis
  4. 4. Creating Knowledge Graphs Tools Used • Neo4j • Graph algorithms – node similarity • Evaluating graph neural nets (gnn) • Python / R • Doc2vec • Entity extraction • BERT, RNN and Spacy 4
  5. 5. Comparison – RDF - LPG 5
  6. 6. KSAT Knowledge Graph Model Workflow 6
  7. 7. Different Domain Sources 7
  8. 8. ONET-SOC 2019 Taxonomy 8
  9. 9. KSATT Data Model
  10. 10. Expand Model to Create Profiles
  11. 11. Connect to External Data Sources
  12. 12. Connect to Mission Data
  13. 13. KSATT DATA MODEL 13
  14. 14. 14
  15. 15. 15
  16. 16. KSATTs by Project 16
  17. 17. Graph Data Science 17 Courtesy of Dr. Alicia Frame, Neo4j
  18. 18. Algorithms Node Similarity compares a set of nodes based on the nodes they are connected to. Two nodes are considered similar if they share many of the same neighbors. Node Similarity computes pair- wise similarities based on the Jaccard metric, also known as the Jaccard Similarity Score. 18 // Compare IT jobs with Program Analyst CALL gds.graph.create.cypher( 'IT_Program_Knowledge', 'MATCH (n) WHERE (n:Occupation) OR (n:Knowledge) RETURN id(n) AS id', 'MATCH (opm:OPM_Series)-[r:IN_OPM_SERIES]-(occ:Occupation) WHERE opm.title IN ["GS-2210", "GS-0080", "GS-0340", "GS-0343"] WITH occ, opm MATCH (occ)-[f:FOUND_IN]-(s:Knowledge) WHERE f.IM > 0.5 RETURN id(occ) AS source, id(s) AS target' ) // Stream Reuslts CALL gds.nodeSimilarity.stream('IT_Program_Knowledge') YIELD node1, node2, similarity WHERE gds.util.asNode(node1).title = 'Management Analysts' RETURN gds.util.asNode(node1).title AS Occupation1, gds.util.asNode(node2).title AS Occupation2, similarity ORDER BY similarity DESCENDING, Occupation1, Occupation2
  19. 19. Career Change 19 Occupation1 Occupation2 similarity Management Analysts Information Technology Project Managers 72.22% Management Analysts Document Management Specialists 68.75% Management Analysts Sustainability Specialists 68.42% Management Analysts Online Merchants 62.50% Management Analysts Business Continuity Planners 61.11% Management Analysts Health Informatics Specialists 60.00% Management Analysts Database Administrators 52.94% Management Analysts Information Security Analysts 47.06% Management Analysts Web Administrators 47.06% Management Analysts Computer Network Support Specialists 44.44%
  20. 20. Discover Connections
  21. 21. Support DEI Initiatives
  22. 22. Rank Skills by Occupation OPM Occupation SOC Group Element Value GS-1550 computer and information research scientists 15- 1111.00 ['Basic_Skills '] understanding written sentences and paragraphs in work related documents. 4.5 GS-1550 computer and information research scientists 15- 1111.00 ['Basic_Skills '] using mathematics to solve problems. 4.38 GS-1550 computer and information research scientists 15- 1111.00 ['Basic_Skills '] giving full attention to what other people are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times. 4.12 GS-1550 computer and information research scientists 15- 1111.00 ['Basic_Skills '] communicating effectively in writing as appropriate for the needs of the audience. 4.12 GS-1550 computer and information research scientists 15- 1111.00 ['Basic_Skills '] talking to others to convey information effectively. 4.12 22 MATCH (opm:OPMSeries)-[r:IN_OPM_Series]-(occ:Occupation) WHERE opm.series IN ["GS-2210", "GS-1550", "GS-854", "GS-855"] WITH occ, opm MATCH (occ)-[f:Found_In]-(s:Basic_Skills) WHERE f.datavalue > 3.75 RETURN opm.series AS OPM, occ.title AS Occupation, occ.onet_soc_code AS SOC, labels(s) AS Group, s.description AS Element, f.datavalue AS Value ORDER BY Value Descending
  23. 23. Employees Similar to an Occupation Based on Abilities 23 Similarity Employee 35Bradford 29Constance 29Craig 29David 29Eric 29Jason 29Mehti 29Naimah 29Steven 29Ted
  24. 24. Contact Information David Meza – david.meza-1@nasa.gov Twitter - @davidmeza1 Linkedin - https://www.linkedin.com/in/davidmeza1/ Github – davidmeza1 Madison Gipson Website: https://madisongipson.com/ LinkedIn: https://linkedin.com/in/mgip Github: https://github.com/mgipson Email: madison.gipson@nasa.gov or mgipson@stetson.edu

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