MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 03/01/99 through 03/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 319 4,309 4,628
Davis 574 25 599
Irvine 1,117 0 1,117
Los Angeles 220 2,198 2,418
Riverside 87 127 214
San Diego 295 2,018 2,313
San Francisco 172 0 172
Santa Barbara 396 1,213 1,609
Santa Cruz 213 277 490
Lawrence Berkeley 0 953 953
Lawrence Livermore 0 1,189 1,189
Los Alamos 0 0 0
Other - UC 60 249 309
Other-Network UC n/a 2,765 2,765
_______ ______ _____
3,453 15,323 18,776
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 11,683 30,701 261,749
INS90 2,392 4,566 22,555
INS85 1,990 3,488 20,839
INS80 1,486 2,571 14,325
INS69 1,225 2,655 19,770
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 495 1,382 8,509
2-4 a.m. 302 697 5,836
4-6 a.m. 319 749 11,239
6-8 a.m. 601 1,586 14,063
8-10 a.m. 1,803 3,932 32,824
10-12 a.m. 2,797 6,768 50,934
12-2 p.m. 2,800 6,333 49,489
2-4 p.m. 3,771 8,866 60,176
4-6 p.m. 2,926 6,441 48,726
6-8 p.m. 1,304 3,130 28,145
8-10 p.m. 902 2,134 15,787
10-12 p.m. 756 1,963 13,510
__________ __________ __________ _________________
Total: 18,776 43,981 339,238
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 733 10,081 10,814
Davis 1,533 54 1,587
Irvine 3,126 0 3,126
Los Angeles 511 4,950 5,461
Riverside 213 324 537
San Diego 716 4,562 5,278
San Francisco 374 0 374
Santa Barbara 981 3,182 4,163
Santa Cruz 545 667 1,212
Lawrence Berkeley 0 2,012 2,012
Lawrence Livermore 0 2,885 2,885
Los Alamos 0 0 0
Other - UC 147 471 618
Other-Network UC n/a 5,914 5,914
_______ ______ _____
8,879 35,102 43,981
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 5,638 77,548 83,186
Davis 10,792 260 11,052
Irvine 27,626 0 27,626
Los Angeles 6,256 42,218 48,474
Riverside 1,015 2,802 3,817
San Diego 4,162 35,224 39,386
San Francisco 3,264 0 3,264
Santa Barbara 5,328 28,160 33,488
Santa Cruz 2,648 4,739 7,387
Lawrence Berkeley 0 15,085 15,085
Lawrence Livermore 0 24,572 24,572
Los Alamos 0 0 0
Other - UC 217 3,006 3,223
Other-Network UC n/a 38,678 38,678
_______ ______ _____
66,946 272,292 339,238
1.4 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 4.9
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) 7:52
Average session length (minutes:seconds) 12:51
Longest session recorded (minutes:seconds) 925:16
Average number of searches completed per session 2.3
Retrievals per search - median 6.0
Retrievals per search - average 389.2
Retrievals per search - standard deviation 4132.8
Percent of searches completed with 0 results 26.9%
Percent of searches entered that are long 4.8%
Percent of long searches completed
(includes partial results) 64.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 40,758 30.8%
DISPLAY (excluding automatic displays) 48,120 36.4%
BROWSE 49 0.0%
SELECT 9 0.0%
HELP 1,498 1.1%
EXPLAIN 2,247 1.7%
SET/RESET 10,852 8.2%
SHOW 503 0.4%
ADD ON (AND, OR, AND NOT) 3,220 2.4%
LOGON or LOGOFF 17,115 12.9%
COMMENT 3 0.0%
SAVE 2,409 1.8%
USE 124 0.1%
OTHER 5,439 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 19,711 44.7% 4,914 24.9% 15 79.1 457.6
TITLE WORD 8,297 18.8% 3,167 38.2% 7 102.0 723.2
EXACT TITLE 274 0.6% 181 66.1% 1 33.2 148.3
JOURNAL 1,395 3.2% 556 39.9% 52 2535.2 8699.6
EXACT JOURNAL 253 0.6% 107 42.3% 189 3428.4 11525.9
SUBJECT 2,392 5.4% 823 34.4% 25 524.1 2423.6
EXACT SUBJECT 76 0.2% 19 25.0% 93 3126.5 5808.3
THESAURUS 35 0.1% 8 22.9% 54 7970.7 19174.8
EXACT THESAURUS 8 0.0% 0 0.0% 379 1089.0 1520.1
KEYWORD 8,543 19.4% 1,635 19.1% 30 1386.0 8257.7
SUBFILE 12 0.0% 4 33.3% 39 143.5 288.5
FORM 227 0.5% 50 22.0% 13 284.1 2265.4
DATE 595 1.4% 194 32.6% 9 133.8 535.7
ADDED 40 0.1% 19 47.5% 14 64.2 138.6
ARTICLE 8 0.0% 0 0.0% 217 7666.6 19180.0
AUTHOR AFFIL. 454 1.0% 135 29.7% 14 409.9 2647.5
CONFERENCE 163 0.4% 70 42.9% 217 1252.2 4426.3
LANGUAGE 142 0.3% 67 47.2% 24 794.8 3110.4
CHEMICAL NAME 156 0.4% 50 32.1% 70 848.7 1447.9
ISSN 4 0.0% 4 100% 0 0.0 0.0
ISBN 1 0.0% 1 100% 0 0.0 0.0
ID NUMBER 105 0.2% 14 13.3% 1 1.0 0.0
PERIODICAL 851 1.9% 211 24.8% 6 52.5 245.7
EXACT PE 129 0.3% 27 20.9% 4 15.9 56.0
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 4 0.0% 3 75.0% 4 4.0 0.0
Other indexes 195 0.4% 29 14.9% 19 255.8 1665.0
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 3,907 9.8% 1,448 37.1% 6 150.1 1669.5
Single 36,124 90.2% 9,317 25.8% 18 560.5 4695.5
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 43 87.8% 8 18.6% 7 15.8 20.6
EXACT THESAURUS 6 12.2% 4 66.7% 25 24.5 31.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
SHORT 87.6%
LONG 1.5%
TAGS 0.2%
FIELDS 2.8%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.8%
COMMENTS 0.0%
Other 2.1%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.5%
Ten most frequent errors:
1. NS command - no next screen 44.6%
2. First word of command is invalid 27.5%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 2.8%
5. PS command - no previous screen 1.5%
6. Search term missing from search command 1.3%
7. DISPLAY command-record numbers too large 1.2%
8. Valid command at an inappropriate time 1.2%
9. NS of SHOW/EXP command-no next screen 1.2%
10. DISPLAY command - no FIND results 0.9%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. FIND (INSPEC DBS) 15.1%
2. INSPEC DATABASES 11.8%
3. GUIDE (INSPEC DBS) 9.6%
4. LOCATE (INS/PSY DBS) 7.2%
5. INDEXES (INSPEC DBS) 6.7%
6. INSPEC BACKFILES 6.5%
7. COMMANDS (INS/PSY/ABI/BIO DBS) 3.7%
8. MAIL 3.2%
9. Unrecognized term 3.1%
10. DATABASES 3.1%
11. All others 30.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.8%
2. First word of command is invalid 12.0%
3. FIND command with invalid index name 6.4%
4. FIND command with zero results 6.4%
5. NS command - no next screen 5.4%
6. DISPLAY command-first of >1 screen 5.4%
7. DISPLAY command - middle of >1 screen 5.0%
8. DISPLAY command - last of >1 screen 4.7%
9. FIND command retrieves >1 book 4.0%
10. DISPLAY command-complete in one screen 3.4%
11. All others 22.5%
Ten most frequent SHOW requests:
1. HISTORY 52.0%
2. SEARCH 12.7%
3. MAIL STATUS 9.0%
4. SETTINGS (INS/PSY DBS) 5.3%
5. PRINT 4.7%
6. SYSTEM NEWS 2.7%
7. SYSTEM1 NEWS 2.0%
8. INSPEC NEWS 1.4%
9. GLOSSARY 1.0%
10. DATABASES 1.0%
11. All others 8.2%