IRS13 Test Environment chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. LENGT[OCRerr], STEM CONCEPTS Documents [OCRerr] Total Relevant to [OCRerr]Normalized :Normalized Number of Sum of Relevant Both S and Recall Precision [OCRerr]equests Unique Weights Documents N Request [OCRerr]in Films11 20 29 17 .9760 .8783 8 .7637 .t+86[OCRerr] Ol 10 10 20 attern Recg'1 15 17 11 8 [OCRerr] .86L+8 O4 7 7 8 .8909 .7260 Fifferentl EQ' 22 2'4 37 17 .9773 .8638 16 17 19 20 .9522 .7911 S Staff Prepared Requests N Non-Staff Prepared Requests : Results using Abstracts, Stem Dictionary, Cbsine Numeric Comparison of Staff and Non-Staff Prepared Requests on IRE-3, using three Pairs of Similar Requests Fig. 13