MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/05/01 through 05/11/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 129 478 607
Davis 61 582 109 752
Irvine 0 466 0 466
Los Angeles 0 24 234 258
Riverside 0 20 38 58
San Diego 88 493 33 614
San Francisco 107 0 1,319 1,426
Santa Barbara 0 1 25 26
Santa Cruz 16 31 88 135
Stanford 290
Other (including DLA) 0 0 2,021 2,021
_______________ _________ _________ _________
Total: 272 1,746 4,345 6,653
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,693 14,789 159,636
MED90 database 865 1,911 12,490
MED85 database 466 963 6,448
MED80 database 304 588 4,313
MED75 database 188 370 2,497
MED66 database 137 262 3,058
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 34 125 1,710
2-4 a.m. 38 84 731
4-6 a.m. 50 88 1,011
6-8 a.m. 157 498 5,687
8-10 a.m. 755 2,195 30,407
10-12 a.m. 1,189 3,175 28,052
12-2 p.m. 1,173 3,171 29,458
2-4 p.m. 1,286 3,615 30,973
4-6 p.m. 1,023 2,949 33,663
6-8 p.m. 510 1,598 13,581
8-10 p.m. 250 837 7,598
10-12 p.m. 188 548 5,571
__________ __________ __________ _________________
Total: 6,653 18,883 188,442
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 15:47 14:15 13:56 13:50
Median 9:41 9:42 12:13 9:12
Total:
Average 15:47 14:15 13:56 13:50
Median 9:41 9:42 12:13 9:12
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.6
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 6,653 100%
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 2.8
Retrievals per search - average 816.8
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8116.7
Percent of searches completed with 0 results 20.4%
Percent of searches entered that are long 0.3%
Percent of long searches completed 72.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,291 25.3%
DISPLAY (excluding automatic displays) 20,056 35.5%
BROWSE 255 0.5%
SELECT 128 0.2%
HELP 253 0.4%
EXPLAIN 297 0.5%
SAVE 3,901 6.9%
SET/RESET 3,309 5.9%
SHOW 174 0.3%
ADD-ON (AND, OR, AND NOT) 3,669 6.5%
LOGON or LOGOFF 7,353 13.0%
COMMENT 0 0.0%
OTHER 2,771 4.9%
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 6,649 32.2% 1,405 21.1% 11 91.0 559.2
TITLE WORD 2,525 12.2% 757 30.0% 7 431.1 3202.9
EXACT TITLE 110 0.5% 63 57.3% 1 51.3 311.9
JOURNAL 854 4.1% 268 31.4% 46 1841.5 6816.7
EXACT JOURNAL 324 1.6% 75 23.1% 380 2034.5 3655.6
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 7,087 34.3% 1,293 18.2% 26 1667.9 13418.4
SUBJECT WORD 25 0.1% 5 20.0% 16 718.6 2867.8
SUBJECT 526 2.5% 185 35.2% 277 3822.7 15468.1
MAJOR SUBJECT 47 0.2% 10 21.3% 89 3614.3 9727.9
EXACT SUBJECT 213 1.0% 46 21.6% 67 2073.3 9126.9
MAJOR XS 40 0.2% 1 2.5% 137 460.5 836.8
EXPLODE XS 71 0.3% 9 12.7% 52 2372.4 5151.9
EXPLODE MAJOR 3 0.0% 0 0.0% 139626 139574 91.2
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 1,132 5.5% 240 21.2% 6 277.9 2133.0
LANGUAGE 435 2.1% 42 9.7% 77 1506.5 0.0
PUB TYPE 250 1.2% 25 10.0% 32 199.3 604.2
Other indexes 281 1.4% 36 12.8% 1 1430.3 9907.5
By number of indexes:
Multiple 6,238 34.8% 1,380 22.1% 10 454.6 5068.0
Single 11,691 65.2% 2,312 19.8% 28 1401.2 10879.9
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 9 3.6% 2 22.2% 2 7.0 11.2
JOURNAL 74 29.6% 19 25.7% 1 23.0 149.1
EXACT JOURNAL 1 0.4% 0 0.0% 15 15.0 0.0
SUBJECT 156 62.4% 31 19.9% 3 7.2 11.3
EXACT SUBJECT 7 2.8% 0 0.0% 1 1.0 0.0
TREE NUMBER 3 1.2% 0 0.0% 105 88.7 73.9
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 250 100% 52 20.8% 2 12.7 79.9
LIMITS:
Number of times limits (bit strings) used: 1,223
Use by bit string (percentage):
Current year minus 5 22.6%
Current year minus 4 0.0%
Current year minus 3 2.0%
Current year minus 2 0.5%
Current year minus 1 0.2%
Current year 0.1%
English Language 36.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.2%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.3%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.7%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 7.3%
XS Infant 0.0%
XS Infant, Newborn 0.4%
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 23.0%
PT Journal Article 0.0%
SUBSET AIM 2.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.9%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,181
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.6%
Percentage of ORs 3.3%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 63.4%
LONG 1.0%
MEDLINE 1.1%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.4%
Ten most frequent errors:
1. NS command - no next screen 40.2%
2. First word of command is invalid 25.7%
3. FIND command with invalid index name 6.0%
4. DISPLAY command contains invalid word 4.4%
5. Add-on search with invalid index name 1.8%
6. PS command - no previous screen 1.7%
7. Valid command at an inappropriate time 1.5%
8. Search term missing from search command 1.4%
9. DISPLAY command - no FIND results 1.4%
10. DISPLAY command-record numbers too large 1.3%
11. All others 14.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.1%
2. MEDLINE BACKFILES 11.4%
3. LOCATE (article dbs w/o monographs) 8.8%
4. FIND 8.8%
5. Unrecognized term 7.7%
6. INDEXES 6.7%
7. DATABASES 4.4%
8. ADD-ON SEARCH 4.4%
9. COMMANDS 3.4%
10. MAIL 3.0%
11. All others 26.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.3%
2. First word of command is invalid 14.0%
3. FIND command with invalid index name 8.4%
4. DISPLAY command - middle of >1 screen 6.5%
5. DISPLAY command-first of >1 screen 6.2%
6. FIND command retrieves >1 book 5.3%
7. NS of SHOW/EXP command-no next screen 3.3%
8. NS command - no next screen 3.1%
9. DISPLAY command - last of >1 screen 3.1%
10. DISPLAY command-complete in one screen 2.2%
11. All others 29.3%
Ten most frequent SHOW requests:
1. HISTORY 69.3%
2. SEARCH 12.9%
3. MAIL STATUS 10.7%
4. MAIL SETTINGS 2.1%
5. SETTINGS 2.1%
6. MEDLINE NEWS 1.4%
7. MEDLINE GLOSSARY 0.7%
8. MEDLINE LOADING STATISTICS 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)