IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval 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. T-2[OCRerr] Actucil Sea[OCRerr]ch Result Theo[OCRerr]etically Worst Result Theoretically Best Result 0.6 C 0 4, CL Th[OCRerr] 0.5 - \ .\ 0.4 0.3 - \ e\ 0.2 - \ \. \\ \\ \[OCRerr]\\\ 0.1 0 0.2 0.4 0.6 0.8 1.0 Reca[OCRerr]l Crar[OCRerr]-1 Coliection, Abstracts, Suffix `5' Dictionary, Micro Averages over [OCRerr]2 Requests, [OCRerr]eudo-Cranfie1d Cut-off Perfoi[OCRerr]ance Curves based on Relevance Grades Fig. 1'.