MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 02/01/99 through 02/28/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 248 3,579 3,827
Davis 763 27 790
Irvine 1,129 0 1,129
Los Angeles 152 2,035 2,187
Riverside 67 152 219
San Diego 274 2,287 2,561
San Francisco 135 0 135
Santa Barbara 351 1,170 1,521
Santa Cruz 220 388 608
Lawrence Berkeley 0 646 646
Lawrence Livermore 0 904 904
Los Alamos 0 0 0
Other - UC 30 250 280
Other-Network UC n/a 2,207 2,207
_______ ______ _____
3,369 13,645 17,014
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 10,936 28,013 228,431
INS90 2,087 3,698 20,186
INS85 1,664 3,061 18,385
INS80 1,226 2,222 11,811
INS69 1,101 2,611 22,065
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 416 945 7,401
2-4 a.m. 288 683 4,255
4-6 a.m. 277 680 5,819
6-8 a.m. 547 1,321 9,166
8-10 a.m. 1,646 3,877 23,329
10-12 a.m. 2,613 6,136 60,375
12-2 p.m. 2,771 6,384 48,959
2-4 p.m. 3,391 7,784 54,461
4-6 p.m. 2,534 5,625 40,844
6-8 p.m. 1,152 2,904 22,922
8-10 p.m. 751 1,793 12,811
10-12 p.m. 628 1,473 10,536
__________ __________ __________ _________________
Total: 17,014 39,605 300,878
1.2 FIND commands
__________________
Zero results may indicate no access to the database
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 551 8,493 9,044
Davis 1,682 36 1,718
Irvine 2,632 0 2,632
Los Angeles 447 5,124 5,571
Riverside 157 341 498
San Diego 705 5,105 5,810
San Francisco 262 0 262
Santa Barbara 994 2,994 3,988
Santa Cruz 644 886 1,530
Lawrence Berkeley 0 1,342 1,342
Lawrence Livermore 0 2,314 2,314
Los Alamos 0 0 0
Other - UC 118 502 620
Other-Network UC n/a 4,276 4,276
_______ ______ _____
8,192 31,413 39,605
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,948 64,737 68,685
Davis 9,590 139 9,729
Irvine 23,003 0 23,003
Los Angeles 3,979 42,853 46,832
Riverside 1,000 2,206 3,206
San Diego 2,841 37,869 40,710
San Francisco 1,152 0 1,152
Santa Barbara 5,413 26,424 31,837
Santa Cruz 3,692 7,721 11,413
Lawrence Berkeley 0 12,462 12,462
Lawrence Livermore 0 17,673 17,673
Los Alamos 0 0 0
Other - UC 1,281 3,305 4,586
Other-Network UC n/a 29,590 29,590
_______ ______ _____
55,899 244,979 300,878
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 4.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 INSPEC Databases Detailed Statistics
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Median session length (minutes:seconds) 7:15
Average session length (minutes:seconds) 12:11
Longest session recorded (minutes:seconds) 357:46
Average number of searches completed per session 2.3
Retrievals per search - median 6.0
Retrievals per search - average 347.0
Retrievals per search - standard deviation 3709.8
Percent of searches completed with 0 results 26.8%
Percent of searches entered that are long 4.7%
Percent of long searches completed
(includes partial results) 63.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 36,220 30.4%
DISPLAY (excluding automatic displays) 42,611 35.8%
BROWSE 21 0.0%
SELECT 1 0.0%
HELP 1,529 1.3%
EXPLAIN 2,228 1.9%
SET/RESET 9,356 7.9%
SHOW 467 0.4%
ADD ON (AND, OR, AND NOT) 3,383 2.8%
LOGON or LOGOFF 16,404 13.8%
COMMENT 5 0.0%
SAVE 1,748 1.5%
USE 102 0.1%
OTHER 5,099 4.3%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 17,296 44.3% 4,178 24.2% 15 74.0 299.7
TITLE WORD 7,453 19.1% 2,821 37.8% 7 87.8 472.6
EXACT TITLE 363 0.9% 229 63.1% 1 32.0 113.9
JOURNAL 1,182 3.0% 458 38.7% 38 2636.4 9932.8
EXACT JOURNAL 333 0.9% 140 42.0% 112 3023.9 9315.4
SUBJECT 2,221 5.7% 786 35.4% 25 419.2 1613.4
EXACT SUBJECT 91 0.2% 31 34.1% 20 1570.7 3587.9
THESAURUS 35 0.1% 10 28.6% 17 2442.6 3722.5
EXACT THESAURUS 23 0.1% 1 4.3% 620 3822.8 12256.4
KEYWORD 7,465 19.1% 1,425 19.1% 31 1180.3 6952.9
SUBFILE 25 0.1% 6 24.0% 16 287.7 1001.2
FORM 136 0.3% 24 17.6% 15 147.9 651.8
DATE 632 1.6% 207 32.8% 8 167.4 843.5
ADDED 36 0.1% 10 27.8% 13 62.8 149.5
ARTICLE 13 0.0% 2 15.4% 32 70.2 103.2
AUTHOR AFFIL. 293 0.7% 70 23.9% 20 524.0 2375.3
CONFERENCE 273 0.7% 88 32.2% 128 530.7 2247.5
LANGUAGE 127 0.3% 50 39.4% 22 2501.9 7985.7
CHEMICAL NAME 83 0.2% 14 16.9% 52 2686.8 13971.7
ISSN 2 0.0% 1 50.0% 104 104.0 0.0
ISBN 1 0.0% 1 100% 0 0.0 0.0
ID NUMBER 8 0.0% 3 37.5% 1 1.0 0.0
PERIODICAL 774 2.0% 220 28.4% 8 277.4 1954.5
EXACT PE 155 0.4% 26 16.8% 5 33.7 121.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 61 0.2% 24 39.3% 1 1474.7 5190.9
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 3,403 9.6% 1,299 38.2% 5 194.0 1745.7
Single 32,146 90.4% 8,170 25.4% 19 496.8 4147.0
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROWSEs No. Index Median Avg. Dev.
______ _______ ______ _______ ______ _______ _______
By index:
THESAURUS 17 80.9% 7 41.2% 2 12.3 23.1
EXACT THESAURUS 4 19.0% 2 50.0% 2 2.0 1.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
SHORT 86.6%
LONG 1.9%
TAGS 0.2%
FIELDS 3.2%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 2.3%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.7%
Ten most frequent errors:
1. NS command - no next screen 42.7%
2. First word of command is invalid 28.4%
3. FIND command with invalid index name 7.3%
4. DISPLAY command contains invalid word 2.9%
5. PS command - no previous screen 1.8%
6. Valid command at an inappropriate time 1.5%
7. Search term missing from search command 1.4%
8. NS of SHOW/EXP command-no next screen 1.3%
9. DISPLAY command - no FIND results 1.2%
10. DISPLAY command-record numbers too large 1.0%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. FIND (INSPEC DBS) 13.1%
2. INSPEC DATABASES 11.1%
3. GUIDE (INSPEC DBS) 11.0%
4. INSPEC BACKFILES 7.6%
5. LOCATE (INS/PSY DBS) 7.2%
6. INDEXES (INSPEC DBS) 5.9%
7. Unrecognized term 4.2%
8. COMMANDS (INS/PSY/ABI/BIO DBS) 3.8%
9. MAIL 3.3%
10. DATABASES 3.1%
11. All others 29.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.1%
2. First word of command is invalid 13.5%
3. FIND command with zero results 5.9%
4. FIND command with invalid index name 5.9%
5. DISPLAY command - middle of >1 screen 5.4%
6. NS command - no next screen 4.9%
7. DISPLAY command-first of >1 screen 4.5%
8. FIND command retrieves >1 book 4.3%
9. DISPLAY command - last of >1 screen 4.1%
10. DISPLAY command-complete in one screen 3.2%
11. All others 22.1%
Ten most frequent SHOW requests:
1. HISTORY 49.5%
2. PRINT 11.3%
3. SEARCH 10.2%
4. MAIL STATUS 9.5%
5. DLA1 NEWS 3.5%
6. SETTINGS (INS/PSY DBS) 2.8%
7. GLOSSARY 2.6%
8. INSPEC NEWS 2.0%
9. DLA NEWS 2.0%
10. DATES 1.1%
11. All others 5.6%