MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 08/01/99 through 08/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 170 2,356 2,526
Davis 326 40 366
Irvine 753 0 753
Los Angeles 91 1,487 1,578
Riverside 53 92 145
San Diego 221 1,254 1,475
San Francisco 143 0 143
Santa Barbara 222 912 1,134
Santa Cruz 109 212 321
Lawrence Berkeley 0 511 511
Lawrence Livermore 0 592 592
Los Alamos 0 13 13
Other - UC 6 217 223
Other-Network UC n/a 1,602 1,602
_______ ______ _____
2,094 9,288 11,382
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 7,083 17,587 147,534
INS90 1,634 3,104 21,798
INS85 1,073 1,896 12,431
INS80 857 1,573 8,657
INS69 735 1,585 11,941
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 252 652 7,522
2-4 a.m. 196 375 3,975
4-6 a.m. 122 336 2,681
6-8 a.m. 317 740 5,831
8-10 a.m. 1,066 2,593 16,099
10-12 a.m. 1,957 4,271 28,477
12-2 p.m. 1,862 4,181 36,980
2-4 p.m. 2,459 5,349 44,446
4-6 p.m. 1,736 3,878 26,421
6-8 p.m. 601 1,529 13,109
8-10 p.m. 484 1,072 11,496
10-12 p.m. 330 769 5,324
__________ __________ __________ _________________
Total: 11,382 25,745 202,361
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 397 5,494 5,891
Davis 834 78 912
Irvine 2,014 0 2,014
Los Angeles 186 3,291 3,477
Riverside 143 255 398
San Diego 584 2,624 3,208
San Francisco 414 0 414
Santa Barbara 469 2,106 2,575
Santa Cruz 220 427 647
Lawrence Berkeley 0 1,099 1,099
Lawrence Livermore 0 1,605 1,605
Los Alamos 0 64 64
Other - UC 24 510 534
Other-Network UC n/a 2,907 2,907
_______ ______ _____
5,285 20,460 25,745
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,820 46,668 49,488
Davis 6,119 153 6,272
Irvine 16,434 0 16,434
Los Angeles 1,049 30,323 31,372
Riverside 474 1,834 2,308
San Diego 3,131 19,002 22,133
San Francisco 2,340 0 2,340
Santa Barbara 3,357 18,991 22,348
Santa Cruz 1,284 3,292 4,576
Lawrence Berkeley 0 11,736 11,736
Lawrence Livermore 0 16,204 16,204
Los Alamos 0 496 496
Other - UC 10 3,463 3,473
Other-Network UC n/a 13,181 13,181
_______ ______ _____
37,018 165,343 202,361
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 5.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.4
2.0 INSPEC Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 8:14
Average session length (minutes:seconds) 11:55
Longest session recorded (minutes:seconds) 220:06
Average number of searches completed per session 2.2
Retrievals per search - median 6.0
Retrievals per search - average 454.3
Retrievals per search - standard deviation 7088.3
Percent of searches completed with 0 results 26.1%
Percent of searches entered that are long 5.0%
Percent of long searches completed
(includes partial results) 67.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 23,456 31.0%
DISPLAY (excluding automatic displays) 26,957 35.6%
BROWSE 26 0.0%
SELECT 1 0.0%
HELP 810 1.1%
EXPLAIN 1,185 1.6%
SET/RESET 6,766 8.9%
SHOW 285 0.4%
ADD ON (AND, OR, AND NOT) 2,289 3.0%
LOGON or LOGOFF 9,881 13.1%
COMMENT 0 0.0%
SAVE 938 1.2%
USE 48 0.1%
OTHER 3,097 4.1%
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 11,954 46.3% 2,819 23.6% 14 64.7 261.7
TITLE WORD 4,887 18.9% 1,909 39.1% 6 89.7 625.2
EXACT TITLE 91 0.4% 51 56.0% 1 34.7 113.0
JOURNAL 703 2.7% 268 38.1% 49 1932.4 7841.2
EXACT JOURNAL 153 0.6% 70 45.8% 101 456.6 739.7
SUBJECT 1,171 4.5% 446 38.1% 22 337.3 1091.1
EXACT SUBJECT 50 0.2% 8 16.0% 55 1683.6 3637.0
THESAURUS 51 0.2% 14 27.4% 40 1334.0 2517.4
EXACT THESAURUS 16 0.1% 1 6.3% 31 660.2 1538.2
KEYWORD 4,606 17.8% 807 17.5% 30 1274.8 8963.4
SUBFILE 27 0.1% 2 7.4% 16 34.3 40.2
FORM 176 0.7% 25 14.2% 15 549.8 5042.9
DATE 868 3.4% 158 18.2% 6 47.8 171.8
ADDED 30 0.1% 13 43.3% 13 60.9 143.8
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 246 1.0% 62 25.2% 25 418.4 1755.9
CONFERENCE 165 0.6% 68 41.2% 89 973.3 3834.1
LANGUAGE 31 0.1% 1 3.2% 29 62.8 69.6
CHEMICAL NAME 47 0.2% 19 40.4% 16 259.3 925.7
ISSN 3 0.0% 1 33.3% 2,517 2516.5 3093.6
ISBN 4 0.0% 0 0.0% 35 72.5 82.2
ID NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 460 1.8% 104 22.6% 6 194.2 1225.3
EXACT PE 53 0.2% 8 15.1% 3 50.9 200.0
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 32 0.1% 1 3.1% 59 1233.5 3497.6
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 2,663 11.5% 848 31.8% 6 84.0 595.8
Single 20,398 88.4% 5,140 25.2% 17 463.0 4761.4
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 23 88.5% 7 30.4% 1 2.5 2.6
EXACT THESAURUS 3 11.5% 1 33.3% 1 1.0 0.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 86.9%
LONG 2.0%
TAGS 0.5%
FIELDS 4.2%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 1.1%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.1%
Ten most frequent errors:
1. NS command - no next screen 45.7%
2. First word of command is invalid 26.7%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 2.9%
5. PS command - no previous screen 1.7%
6. NS of SHOW/EXP command-no next screen 1.5%
7. Search term missing from search command 1.3%
8. DISPLAY command - no FIND results 1.3%
9. Valid command at an inappropriate time 1.2%
10. DISPLAY command-record numbers too large 1.0%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. INSPEC DATABASES 15.4%
2. FIND (INSPEC DBS) 13.1%
3. GUIDE (INSPEC DBS) 7.6%
4. INSPEC BACKFILES 7.4%
5. INDEXES (INSPEC DBS) 7.4%
6. LOCATE (INS/PSY DBS) 7.2%
7. DATABASES 5.1%
8. COMMANDS (INS/PSY/ABI/BIO DBS) 3.9%
9. Unrecognized term 3.9%
10. MAIL 2.9%
11. All others 26.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.6%
2. First word of command is invalid 13.7%
3. NS command - no next screen 6.1%
4. FIND command with invalid index name 5.6%
5. DISPLAY command - middle of >1 screen 5.3%
6. FIND command with zero results 5.0%
7. DISPLAY command - last of >1 screen 4.9%
8. DISPLAY command-first of >1 screen 4.7%
9. DISPLAY command-complete in one screen 3.5%
10. FIND command retrieves >1 book 3.2%
11. All others 22.6%
Ten most frequent SHOW requests:
1. HISTORY 59.1%
2. SEARCH 9.1%
3. INSPEC NEWS 7.7%
4. MAIL STATUS 6.9%
5. SETTINGS (INS/PSY DBS) 5.1%
6. SYSTEM NEWS 1.5%
7. INSPEC LOADING STATISTICS 1.1%
8. GLOSSARY 1.1%
9. TEN-YEAR DATABASE NEWS 1.1%
10. DATABASES 1.1%
11. All others 6.2%