MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/01/99 through 12/31/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 788 3,352 4,140
Davis 167 3,626 1,051 4,844
Irvine 0 3,294 0 3,294
Los Angeles 0 2,445 1,112 3,557
Riverside 0 132 413 545
San Diego 748 3,010 276 4,034
San Francisco 731 0 8,467 9,198
Santa Barbara 0 149 215 364
Santa Cruz 149 55 275 479
Stanford 2,046
Other (including DLA) 0 0 9,936 9,936
_______________ _________ _________ _________
Total: 1,795 13,499 25,097 42,437
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 30,162 97,225 1,068,594
MED90 database 5,712 13,106 86,469
MED85 database 2,920 5,952 30,805
MED80 database 1,867 3,597 18,688
MED75 database 1,067 2,092 12,486
MED66 database 709 1,501 9,136
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 493 1,207 12,561
2-4 a.m. 180 505 4,928
4-6 a.m. 139 421 4,505
6-8 a.m. 765 2,345 21,124
8-10 a.m. 4,561 13,187 116,412
10-12 a.m. 8,424 23,766 215,472
12-2 p.m. 7,734 22,136 232,830
2-4 p.m. 9,127 26,604 274,473
4-6 p.m. 6,026 17,466 176,410
6-8 p.m. 2,490 7,381 81,076
8-10 p.m. 1,602 5,229 47,680
10-12 p.m. 896 3,226 38,707
__________ __________ __________ _________________
Total: 42,437 123,473 1,226,178
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 17:17 13:35 16:28 13:40
Median 11:21 8:30 11:12 8:30
Total:
Average 17:17 13:35 16:28 13:40
Median 11:21 8:30 11:12 8:30
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.2 4.4
transmission of response
Display - from receipt of command at DLA until 0.1 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 42,437 100%
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 660.7
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6560.7
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.3%
Percent of long searches completed 60.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 94,570 25.5%
DISPLAY (excluding automatic displays) 130,203 35.2%
BROWSE 1,614 0.4%
SELECT 1,195 0.3%
HELP 3,103 0.8%
EXPLAIN 2,708 0.7%
SAVE 27,474 7.4%
SET/RESET 19,499 5.3%
SHOW 1,296 0.4%
ADD-ON (AND, OR, AND NOT) 23,412 6.3%
LOGON or LOGOFF 47,870 12.9%
COMMENT 2 0.0%
OTHER 17,294 4.7%
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 40,380 30.8% 8,450 20.9% 11 107.1 672.9
TITLE WORD 14,744 11.2% 4,573 31.0% 8 342.2 2121.6
EXACT TITLE 1,532 1.2% 743 48.5% 1 29.5 177.3
JOURNAL 5,744 4.4% 1,818 31.6% 120 1835.9 12290.7
EXACT JOURNAL 1,832 1.4% 513 28.0% 287 1571.1 3325.1
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 47,290 36.1% 8,968 19.0% 28 1252.0 9746.7
SUBJECT WORD 150 0.1% 60 40.0% 421 20126.7 58233.6
SUBJECT 3,563 2.7% 1,371 38.5% 162 3095.4 12220.1
MAJOR SUBJECT 475 0.4% 87 18.3% 106 1060.5 2906.3
EXACT SUBJECT 1,465 1.1% 260 17.7% 108 1352.2 6347.7
MAJOR XS 212 0.2% 42 19.8% 274 1797.8 4085.9
EXPLODE XS 758 0.6% 104 13.7% 135 6022.5 22998.0
EXPLODE MAJOR 62 0.0% 5 8.1% 130 1361.2 2944.7
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 5,411 4.1% 843 15.6% 10 154.6 774.6
LANGUAGE 3,394 2.6% 155 4.6% 79 595.2 0.0
PUB TYPE 1,599 1.2% 117 7.3% 34 586.7 3737.9
Other indexes 2,080 1.6% 249 12.0% 1 41.2 283.7
By number of indexes:
Multiple 36,865 31.4% 8,342 22.6% 10 407.4 6712.6
Single 80,677 68.6% 16,536 20.5% 27 1079.6 7879.1
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 66 4.1% 10 15.2% 4 50.4 125.9
JOURNAL 308 19.3% 65 21.1% 2 6.2 13.4
EXACT JOURNAL 80 5.0% 26 32.5% 1 2.6 5.6
SUBJECT 1,053 65.9% 225 21.4% 2 42.4 446.4
EXACT SUBJECT 92 5.8% 29 31.5% 1 1.5 3.8
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 1,599 100% 355 22.2% 2 31.9 365.5
LIMITS:
Number of times limits (bit strings) used: 6,973
Use by bit string (percentage):
Current year minus 5 0.4%
Current year minus 4 0.0%
Current year minus 3 1.7%
Current year minus 2 0.4%
Current year minus 1 0.4%
Current year 0.4%
English Language 52.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.8%
XS Animal 0.0%
XS Case Report 0.1%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 9.5%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.1%
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 26.6%
PT Journal Article 0.1%
SUBSET AIM 4.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 42,770
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.3%
Percentage of ORs 2.7%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
BRIEF 64.7%
LONG 0.8%
MEDLINE 1.1%
FIELDS 2.8%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
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 9.5%
Ten most frequent errors:
1. NS command - no next screen 39.7%
2. First word of command is invalid 26.9%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 2.2%
6. Valid command at an inappropriate time 1.7%
7. Add-on search with invalid index name 1.7%
8. Search term missing from search command 1.6%
9. NS of SHOW/EXP command-no next screen 1.5%
10. DISPLAY command-record numbers too large 1.1%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 14.7%
2. BOOKS DATABASE 13.0%
3. FIND 8.5%
4. MEDLINE BACKFILES 7.3%
5. Unrecognized term 6.1%
6. COMMANDS 5.9%
7. DATABASES 3.8%
8. ADD-ON SEARCH 3.5%
9. INDEXES 3.5%
10. DISPLAY 3.1%
11. All others 30.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.5%
2. First word of command is invalid 15.1%
3. DISPLAY command-first of >1 screen 7.3%
4. FIND command with invalid index name 6.2%
5. DISPLAY command - middle of >1 screen 5.2%
6. FIND command retrieves >1 book 4.5%
7. NS command - no next screen 3.8%
8. DISPLAY command - last of >1 screen 3.1%
9. FIND command with zero results 2.3%
10. DISPLAY command-complete in one screen 2.3%
11. All others 30.7%
Ten most frequent SHOW requests:
1. HISTORY 62.0%
2. SEARCH 15.8%
3. MAIL STATUS 10.5%
4. MEDLINE GLOSSARY 2.1%
5. SETTINGS 2.0%
6. MAIL SETTINGS 1.3%
7. MEDLINE NEWS 1.0%
8. UPDATE 1.0%
9. DATABASES 0.5%
10. DISPLAY 0.4%
11. All others 3.3%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)