IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Analysis of the Documentation Requests
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.
ision
ORIGINAL
0
U MODIFIED
Precision
ORIGINAL
0
0O
Precision
U MODIFIED EM
U
No'>
ONo[OCRerr]
1.0 - 1.0
0.8 0.8 -
0.6 0.6 [OCRerr]0 *[OCRerr]
0.4
N\*N~
[OCRerr]0[OCRerr]U
0.4
0.2 0.2
I I I I I
0.2 0.4 0.6 0.8
I I I I I I I I I
1.0 0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.
Recoil Recall Recall
a) Full Text, Stem
b) Pull Text, Thesaurus
c) Full Text, Thesauru[OCRerr]
and Phrases
ADI Documentation Collection, 82 Documents, Averages over 35 Requests.
Performance Comparisons Between Requests as Received (Original) and Manual
Modification by Important "Key" Term Weight Increases.
Fig. i6.