MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/08/01 through 12/14/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 54 287 341
Davis 27 412 55 494
Irvine 0 258 0 258
Los Angeles 0 0 65 65
Riverside 0 7 28 35
San Diego 33 291 34 358
San Francisco 69 0 693 762
Santa Barbara 0 0 19 19
Santa Cruz 0 1 29 30
Stanford 69
Other (including DLA) 0 0 1,419 1,419
_______________ _________ _________ _________
Total: 129 1,023 2,629 3,850
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 2,812 8,434 77,245
MED90 database 438 951 6,825
MED85 database 250 503 7,561
MED80 database 165 317 2,692
MED75 database 99 203 1,320
MED66 database 86 191 1,671
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 39 78 825
2-4 a.m. 18 44 198
4-6 a.m. 11 28 180
6-8 a.m. 86 279 1,385
8-10 a.m. 445 1,320 9,316
10-12 a.m. 774 2,171 21,392
12-2 p.m. 661 1,882 16,659
2-4 p.m. 843 2,274 21,643
4-6 p.m. 529 1,359 14,553
6-8 p.m. 206 562 5,990
8-10 p.m. 152 383 3,328
10-12 p.m. 86 219 1,845
__________ __________ __________ _________________
Total: 3,850 10,599 97,314
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 22:26 13:41 14:06 13:33
Median 13:40 9:37 12:03 9:39
Total:
Average 22:26 13:41 14:06 13:33
Median 13:40 9:37 12:03 9:39
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.0
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 3,850 100%
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 2.7
Retrievals per search - average 836.6
Retrievals per search - median 8.0
Retrievals per search - standard deviation 10269.9
Percent of searches completed with 0 results 21.3%
Percent of searches entered that are long 0.2%
Percent of long searches completed 70.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 7,627 25.8%
DISPLAY (excluding automatic displays) 9,836 33.3%
BROWSE 150 0.5%
SELECT 32 0.1%
HELP 167 0.6%
EXPLAIN 121 0.4%
SAVE 1,674 5.7%
SET/RESET 1,923 6.5%
SHOW 74 0.3%
ADD-ON (AND, OR, AND NOT) 2,453 8.3%
LOGON or LOGOFF 4,069 13.8%
COMMENT 0 0.0%
OTHER 1,405 4.8%
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 3,491 31.5% 696 19.9% 12 191.1 1508.6
TITLE WORD 1,843 16.6% 593 32.2% 9 403.3 1857.0
EXACT TITLE 68 0.6% 41 60.3% 1 137.1 597.1
JOURNAL 491 4.4% 145 29.5% 222 2560.2 10739.1
EXACT JOURNAL 202 1.8% 71 35.1% 201 1732.4 3512.4
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 3,519 31.7% 697 19.8% 36 1968.6 18317.5
SUBJECT WORD 5 0.0% 3 60.0% 48,666 48666.0 68473.4
SUBJECT 139 1.3% 59 42.4% 121 4477.2 15235.6
MAJOR SUBJECT 17 0.2% 3 17.6% 1,409 2978.1 3807.0
EXACT SUBJECT 134 1.2% 47 35.1% 69 1434.5 6929.9
MAJOR XS 28 0.3% 6 21.4% 2,515 3977.2 6164.8
EXPLODE XS 45 0.4% 7 15.6% 89 4073.4 10935.0
EXPLODE MAJOR 14 0.1% 0 0.0% 2,061 6345.1 13620.8
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 695 6.3% 94 13.5% 13 100.7 371.8
LANGUAGE 176 1.6% 9 5.1% 73 383.7 0.0
PUB TYPE 148 1.3% 11 7.4% 30 3231.7 29597.0
Other indexes 114 1.0% 30 26.3% 1 3.0 18.4
By number of indexes:
Multiple 3,516 35.0% 809 23.0% 9 876.5 14547.4
Single 6,543 65.0% 1,380 21.1% 36 1248.9 10227.6
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 2 1.4% 0 0.0% 95 94.5 24.7
JOURNAL 14 9.5% 5 35.7% 1 3.1 3.4
EXACT JOURNAL 3 2.0% 1 33.3% 2 1.5 0.7
SUBJECT 121 81.8% 33 27.3% 2 65.1 545.0
EXACT SUBJECT 8 5.4% 1 12.5% 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 148 100% 40 27.0% 1 55.2 492.0
LIMITS:
Number of times limits (bit strings) used: 646
Use by bit string (percentage):
Current year minus 5 41.9%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.9%
Current year minus 1 0.5%
Current year 0.6%
English Language 27.4%
French Language 0.3%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.5%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 8.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.2%
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 15.8%
PT Journal Article 0.0%
SUBSET AIM 0.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,103
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.2%
Percentage of ORs 7.1%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.9%
BRIEF 61.1%
LONG 1.1%
MEDLINE 1.0%
FIELDS 3.8%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 27.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 39.5%
2. First word of command is invalid 23.4%
3. FIND command with invalid index name 8.0%
4. DISPLAY command contains invalid word 3.7%
5. Search term missing from search command 2.2%
6. Add-on search with invalid index name 2.0%
7. DISPLAY command - no FIND results 1.7%
8. PS command - no previous screen 1.6%
9. 1185 1.3%
10. Valid command at an inappropriate time 1.1%
11. All others 15.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 13.2%
2. BOOKS DATABASE 12.4%
3. FIND 11.6%
4. MEDLINE BACKFILES 9.1%
5. DATABASES 6.6%
6. 1752 4.1%
7. COMMANDS 3.3%
8. Unrecognized term 2.5%
9. INDEXES 2.5%
10. 3318 2.5%
11. All others 31.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 16.3%
2. First word of command is invalid 13.9%
3. FIND command with invalid index name 13.5%
4. FIND command with zero results 4.2%
5. FIND command retrieves >1 book 4.2%
6. DISPLAY command-first of >1 screen 4.2%
7. NS command - no next screen 3.5%
8. 848 3.1%
9. 200 2.8%
10. DISPLAY command - last of >1 screen 2.8%
11. All others 32.2%
Ten most frequent SHOW requests:
1. HISTORY 60.6%
2. MAIL STATUS 12.1%
3. MEDLINE NEWS 10.6%
4. MAIL SETTINGS 6.1%
5. SEARCH 6.1%
6. 0026 1.5%
7. SETTINGS 1.5%
8. MEDLINE GLOSSARY 1.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)