MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 03/03/01 through 03/09/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 181 654 835
Davis 45 620 83 748
Irvine 0 524 0 524
Los Angeles 0 203 147 350
Riverside 0 7 30 37
San Diego 110 626 22 758
San Francisco 92 0 1,345 1,437
Santa Barbara 0 26 63 89
Santa Cruz 5 3 73 81
Stanford 308
Other (including DLA) 0 0 1,843 1,843
_______________ _________ _________ _________
Total: 252 2,190 4,260 7,010
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,079 15,587 182,835
MED90 database 877 1,970 12,336
MED85 database 440 938 5,020
MED80 database 314 650 3,030
MED75 database 155 344 1,798
MED66 database 145 329 1,382
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 66 126 1,442
2-4 a.m. 30 63 2,633
4-6 a.m. 43 115 949
6-8 a.m. 164 373 2,480
8-10 a.m. 818 2,281 21,679
10-12 a.m. 1,344 3,601 42,245
12-2 p.m. 1,233 3,347 35,170
2-4 p.m. 1,442 4,642 42,552
4-6 p.m. 1,050 2,947 32,736
6-8 p.m. 405 1,102 11,111
8-10 p.m. 259 698 8,521
10-12 p.m. 156 523 4,883
__________ __________ __________ _________________
Total: 7,010 19,818 206,401
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 14:31 13:06 17:21 13:31
Median 10:44 8:28 13:10 8:56
Total:
Average 14:31 13:06 17:21 13:31
Median 10:44 8:28 13:10 8:56
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.8
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 7,010 100%
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 726.7
Retrievals per search - median 9.0
Retrievals per search - standard deviation 5128.4
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.2%
Percent of long searches completed 66.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,986 25.5%
DISPLAY (excluding automatic displays) 19,812 33.7%
BROWSE 471 0.8%
SELECT 185 0.3%
HELP 403 0.7%
EXPLAIN 393 0.7%
SAVE 4,560 7.8%
SET/RESET 3,348 5.7%
SHOW 142 0.2%
ADD-ON (AND, OR, AND NOT) 3,853 6.6%
LOGON or LOGOFF 7,817 13.3%
COMMENT 0 0.0%
OTHER 2,828 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 5,986 28.1% 1,293 21.6% 13 128.0 729.0
TITLE WORD 2,735 12.9% 854 31.2% 6 312.6 2138.4
EXACT TITLE 139 0.7% 72 51.8% 1 16.0 69.4
JOURNAL 1,068 5.0% 344 32.2% 86 2122.8 5924.6
EXACT JOURNAL 354 1.7% 117 33.1% 368 1728.9 3393.6
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 7,590 35.7% 1,466 19.3% 31 1292.0 7922.3
SUBJECT WORD 36 0.2% 10 27.8% 73 2394.0 7579.5
SUBJECT 506 2.4% 202 39.9% 218 4361.5 16977.8
MAJOR SUBJECT 71 0.3% 9 12.7% 405 2537.6 7173.2
EXACT SUBJECT 300 1.4% 73 24.3% 160 3640.0 14476.7
MAJOR XS 102 0.5% 7 6.9% 2,018 3348.4 3841.3
EXPLODE XS 104 0.5% 7 6.7% 416 5878.5 23117.8
EXPLODE MAJOR 58 0.3% 4 6.9% 3,236 6153.4 5257.3
TREE NUMBER 4 0.0% 4 100% 0 0.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1,171 5.5% 258 22.0% 14 211.2 724.3
LANGUAGE 462 2.2% 23 5.0% 81 615.0 0.0
PUB TYPE 461 2.2% 30 6.5% 38 341.3 1682.7
Other indexes 267 1.3% 27 10.1% 1 81.2 433.6
By number of indexes:
Multiple 6,289 33.4% 1,463 23.3% 12 437.1 3653.7
Single 12,514 66.6% 2,629 21.0% 33 1229.9 6733.3
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 28 6.1% 1 3.6% 4 8.1 11.5
JOURNAL 58 12.6% 22 37.9% 3 25.2 57.4
EXACT JOURNAL 10 2.2% 1 10.0% 1 2.2 2.1
SUBJECT 334 72.4% 58 17.4% 2 40.8 300.8
EXACT SUBJECT 31 6.7% 11 35.5% 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 461 100% 93 20.2% 2 33.8 261.4
LIMITS:
Number of times limits (bit strings) used: 1,401
Use by bit string (percentage):
Current year minus 5 25.1%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.5%
Current year minus 1 0.3%
Current year 0.9%
English Language 36.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.2%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.6%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.1%
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 20.9%
PT Journal Article 0.2%
SUBSET AIM 3.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,207
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 4.2%
Percentage of AND NOTs 0.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 63.3%
LONG 1.0%
MEDLINE 1.0%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.5%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 38.8%
2. First word of command is invalid 27.7%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.7%
5. PS command - no previous screen 2.1%
6. Add-on search with invalid index name 1.7%
7. Search term missing from search command 1.7%
8. Valid command at an inappropriate time 1.6%
9. DISPLAY command - no FIND results 1.4%
10. DISPLAY command-record numbers too large 1.0%
11. All others 14.0%
Ten most frequent EXPLAIN requests:
1. FIND 13.5%
2. LOCATE (article dbs w/o monographs) 10.4%
3. BOOKS DATABASE 10.2%
4. MEDLINE BACKFILES 9.9%
5. ADD-ON SEARCH 4.8%
6. DATABASES 4.6%
7. COMMANDS 4.6%
8. Unrecognized term 3.8%
9. INDEXES 3.6%
10. DISPLAY 3.3%
11. All others 27.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.7%
2. First word of command is invalid 13.8%
3. DISPLAY command-first of >1 screen 7.5%
4. FIND command retrieves >1 book 6.3%
5. FIND command with invalid index name 6.0%
6. DISPLAY command - middle of >1 screen 4.5%
7. NS command - no next screen 3.9%
8. DISPLAY command-complete in one screen 3.3%
9. DISPLAY command - last of >1 screen 3.3%
10. FIND command with zero results 2.5%
11. All others 31.3%
Ten most frequent SHOW requests:
1. HISTORY 72.0%
2. SEARCH 14.4%
3. MEDLINE NEWS 4.0%
4. MAIL SETTINGS 2.4%
5. SETTINGS 1.6%
6. MEDLINE GLOSSARY 1.6%
7. MAIL STATUS 1.6%
8. DATABASES 1.6%
9. MEDLINE LOADING STATISTICS 0.8%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)