MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/01/01 through 01/31/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 547 2,692 3,239
Davis 185 3,502 575 4,262
Irvine 0 2,307 0 2,307
Los Angeles 0 658 786 1,444
Riverside 0 63 264 327
San Diego 502 2,365 304 3,171
San Francisco 570 0 6,769 7,339
Santa Barbara 0 66 363 429
Santa Cruz 39 21 254 314
Stanford 1,337
Other (including DLA) 0 0 9,250 9,250
_______________ _________ _________ _________
Total: 1,296 9,529 21,257 33,419
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 24,061 75,700 883,937
MED90 database 4,082 9,319 65,622
MED85 database 2,179 4,244 27,934
MED80 database 1,486 2,843 17,076
MED75 database 923 1,822 8,453
MED66 database 688 1,584 9,033
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 274 825 10,630
2-4 a.m. 136 419 24,847
4-6 a.m. 395 740 5,978
6-8 a.m. 811 2,376 20,777
8-10 a.m. 3,791 10,536 100,981
10-12 a.m. 6,431 18,153 178,683
12-2 p.m. 5,791 16,347 165,912
2-4 p.m. 6,796 20,298 216,356
4-6 p.m. 4,889 13,869 143,919
6-8 p.m. 2,006 5,642 66,966
8-10 p.m. 1,263 3,637 44,933
10-12 p.m. 836 2,670 32,073
__________ __________ __________ _________________
Total: 33,419 95,512 1,012,055
Session length (minutes:seconds):
Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Assist:
Average 0.0 0.0 0.0 0:00
Median 0.0 0.0 0.0 0:00
Command:
Average 17:00 14:16 19:08 14:10
Median 11:36 8:15 12:53 8:38
Total:
Average 17:00 14:16 19:08 14:10
Median 11:36 8:15 12:53 8:38
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.5
transmission of response
Display - from receipt of command at DLA until 0.1 0.1
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 33,419 100%
E MED option:
E MED chosen from Welcome screen 0
E MED chosen from Assist screens 0
Specific screens chosen from within E MED:
Master Menu 0
FIND command 0
FIND command examples 0
DISPLAY command 0
DISPLAY command - other options 0
BROWSE command 0
BROWSE DISPLAY options 0
SELECT command 0
Assistance commands 0
START and END commands 0
Other commands 0
Combine commands 0
SHOW HISTORY command 0
SAVE command 0
COMMENT command 0
2.0 ASSIST MODE
________________
Assist mode sessions as: % of Campus
% of Total MELVYL MEDLINE
Assist Sessions Sessions
_______________ ______________
Berkeley 0.0% 0.0%
Davis 0.0% 0.0%
Irvine 0.0% 0.0%
Los Angeles 0.0% 0.0%
Riverside 0.0% 0.0%
San Diego 0.0% 0.0%
San Francisco 0.0% 0.0%
Santa Barbara 0.0% 0.0%
Santa Cruz 0.0% 0.0%
Stanford 0.0% 0.0%
Other 0.0% 0.0%
% of Group
% of Total MELVYL MEDLINE
Assist Sessions Sessions
_______________ ______________
Medical/Health/Life Sciences 0.0% 0.0%
All Other Libraries 0.0% 0.0%
Remote 0.0% 0.0%
SEARCH information:
Average number of searches completed per session 0.0
Retrievals per search - average 0.0
Retrievals per search - median 0.0
Retrievals per search - standard deviation 0.0
Percent of searches completed with 0 results 0.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 0 0.0%
DISPLAY (excluding automatic displays) 0 0.0%
BROWSE SU 0 0.0%
SELECT 0 0.0%
HELP 0 0.0%
SAVE 0 0.0%
ADD-ON (AND, OR) 0 0.0%
LOGON or LOGOFF 0 0.0%
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 AUTH 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 0 0.0% 0 0.0% 0 0.0 0.0
LIMITS:
Number of times limits (bit strings) used: 0
Use by bit string (percentage):
Current year 0.0%
English Language 0.0%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.0%
XS Female 0.0%
XS Human 0.0%
XS Male 0.0%
PT Review 0.0%
BOOLEAN:
Number of searches with Booleans: 0
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 0.0%
Percentage of ORs 0.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
BRIEF 0.0%
LONG 0.0%
TITLE/SUBJECT 0.0%
3.0 COMMAND MODE
________________
SEARCH information:
Average number of searches completed per session 2.9
Retrievals per search - average 826.6
Retrievals per search - median 9.0
Retrievals per search - standard deviation 7746.9
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 58.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 72,433 25.0%
DISPLAY (excluding automatic displays) 102,635 35.4%
BROWSE 1,493 0.5%
SELECT 783 0.3%
HELP 1,760 0.6%
EXPLAIN 1,515 0.5%
SAVE 22,527 7.8%
SET/RESET 16,117 5.6%
SHOW 1,037 0.4%
ADD-ON (AND, OR, AND NOT) 19,019 6.6%
LOGON or LOGOFF 37,383 12.9%
COMMENT 0 0.0%
OTHER 12,993 4.5%
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 AUTH 30,110 29.5% 6,285 20.9% 12 115.9 675.6
TITLE WORD 11,975 11.7% 3,939 32.9% 9 397.0 2707.5
EXACT TITLE 1,170 1.1% 538 46.0% 1 23.8 208.9
JOURNAL 4,432 4.3% 1,330 30.0% 126 1961.3 6300.4
EXACT JOURNAL 1,313 1.3% 390 29.7% 464 2384.5 4299.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 36,257 35.5% 6,980 19.3% 30 1464.8 10725.9
SUBJECT WORD 63 0.1% 38 60.3% 247 2738.7 4952.7
SUBJECT 2,551 2.5% 891 34.9% 200 4853.7 19847.8
MAJOR SUBJECT 273 0.3% 48 17.6% 251 2530.5 7193.6
EXACT SUBJECT 1,827 1.8% 449 24.6% 89 1465.9 7886.3
MAJOR XS 273 0.3% 48 17.6% 440 1460.5 2145.1
EXPLODE XS 663 0.6% 116 17.5% 191 11451.5 44037.9
EXPLODE MAJOR 298 0.3% 36 12.1% 534 6800.2 26635.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4,196 4.1% 754 18.0% 17 176.8 829.6
LANGUAGE 2,775 2.7% 155 5.6% 73 588.8 0.0
PUB TYPE 1,474 1.4% 92 6.2% 34 1018.2 6827.5
Other indexes 2,118 2.1% 244 11.5% 1 124.5 2595.6
By number of indexes:
Multiple 29,497 32.3% 6,536 22.2% 13 559.8 6207.5
Single 61,733 67.7% 12,891 20.9% 28 1343.1 9914.7
BROWSES completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 46 3.1% 5 10.9% 9 48.8 94.1
JOURNAL 280 19.0% 58 20.7% 2 19.4 151.1
EXACT JOURNAL 49 3.3% 12 24.5% 1 1.5 1.2
SUBJECT 995 67.5% 201 20.2% 2 44.4 449.3
EXACT SUBJECT 104 7.1% 16 15.4% 1 1.0 0.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 1,474 100% 292 19.8% 2 35.3 374.6
LIMITS:
Number of times limits (bit strings) used: 6,962
Use by bit string (percentage):
Current year minus 5 18.6%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.3%
Current year minus 1 0.2%
Current year 0.2%
English Language 41.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.3%
XS Adult 0.4%
XS Aged 0.6%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.8%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 10.0%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.4%
XS Rats 0.0%
XS Support Non-U.S. Govt 0.0%
XS Support U.S. Govt, Non-P.H.S. 0.0%
XS Support U.S. Govt, P.H.S. 0.0%
PT Review 20.7%
PT Journal Article 0.2%
SUBSET AIM 2.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 34,778
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.1%
Percentage of ORs 4.4%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
BRIEF 62.9%
LONG 1.0%
MEDLINE 0.9%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. NS command - no next screen 39.9%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 4.1%
5. Add-on search with invalid index name 1.9%
6. PS command - no previous screen 1.8%
7. DISPLAY command - no FIND results 1.7%
8. Search term missing from search command 1.7%
9. Valid command at an inappropriate time 1.6%
10. DISPLAY command-record numbers too large 1.1%
11. All others 14.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.0%
2. MEDLINE BACKFILES 10.8%
3. FIND 9.6%
4. LOCATE (article dbs w/o monographs) 7.9%
5. Unrecognized term 5.7%
6. COMMANDS 5.3%
7. INDEXES 4.1%
8. DATABASES 3.7%
9. ADD-ON SEARCH 2.8%
10. DISPLAY 2.6%
11. All others 28.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.4%
2. First word of command is invalid 14.7%
3. FIND command with invalid index name 7.1%
4. FIND command retrieves >1 book 4.8%
5. DISPLAY command - middle of >1 screen 4.6%
6. DISPLAY command-first of >1 screen 4.6%
7. NS command - no next screen 3.5%
8. DISPLAY command - last of >1 screen 2.9%
9. DISPLAY command-complete in one screen 2.4%
10. Add-on without index name 2.3%
11. All others 32.4%
Ten most frequent SHOW requests:
1. HISTORY 69.9%
2. SEARCH 16.1%
3. MAIL STATUS 6.0%
4. SETTINGS 2.5%
5. MEDLINE GLOSSARY 1.6%
6. UPDATE 1.0%
7. MAIL SETTINGS 0.9%
8. MEDLINE STATISTICS 0.4%
9. MEDLINE NEWS 0.4%
10. DISPLAY 0.2%
11. All others 1.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)