MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/01/01 through 04/30/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 713 2,339 3,052
Davis 96 4,005 312 4,413
Irvine 0 1,714 0 1,714
Los Angeles 0 80 514 594
Riverside 0 47 229 276
San Diego 469 2,074 212 2,755
San Francisco 386 0 6,068 6,454
Santa Barbara 0 20 131 151
Santa Cruz 73 31 377 481
Stanford 1,214
Other (including DLA) 0 0 8,808 8,808
_______________ _________ _________ _________
Total: 1,024 8,684 18,990 29,912
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 21,978 67,532 774,864
MED90 database 3,477 7,259 52,017
MED85 database 1,850 3,676 26,472
MED80 database 1,255 2,427 15,357
MED75 database 770 1,504 10,782
MED66 database 582 1,244 8,567
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 302 995 10,089
2-4 a.m. 250 395 1,922
4-6 a.m. 1,645 1,889 3,775
6-8 a.m. 607 1,697 20,437
8-10 a.m. 3,341 9,055 106,587
10-12 a.m. 5,123 14,952 149,461
12-2 p.m. 4,951 13,985 134,824
2-4 p.m. 5,329 15,661 168,351
4-6 p.m. 4,271 12,453 133,616
6-8 p.m. 1,922 5,870 69,276
8-10 p.m. 1,373 4,274 52,301
10-12 p.m. 798 2,416 37,420
__________ __________ __________ _________________
Total: 29,912 83,642 888,059
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 16:56 12:33 16:48 13:21
Median 10:54 6:21 12:05 7:20
Total:
Average 16:56 12:33 16:48 13:21
Median 10:54 6:21 12:05 7:20
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.7
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 29,912 100%
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 880.6
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8003.4
Percent of searches completed with 0 results 21.8%
Percent of searches entered that are long 0.4%
Percent of long searches completed 61.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 63,329 24.8%
DISPLAY (excluding automatic displays) 90,180 35.3%
BROWSE 1,979 0.8%
SELECT 666 0.3%
HELP 1,596 0.6%
EXPLAIN 1,269 0.5%
SAVE 17,070 6.7%
SET/RESET 15,313 6.0%
SHOW 1,024 0.4%
ADD-ON (AND, OR, AND NOT) 16,393 6.4%
LOGON or LOGOFF 34,551 13.5%
COMMENT 0 0.0%
OTHER 11,892 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 25,588 28.7% 5,066 19.8% 12 114.1 794.7
TITLE WORD 12,172 13.7% 3,669 30.1% 9 500.1 2950.5
EXACT TITLE 735 0.8% 311 42.3% 1 47.7 546.0
JOURNAL 4,221 4.7% 1,240 29.4% 138 2001.5 6615.4
EXACT JOURNAL 1,150 1.3% 272 23.6% 449 2649.2 4807.5
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 30,352 34.1% 5,526 18.2% 31 1432.0 10562.5
SUBJECT WORD 92 0.1% 39 42.4% 21 18250.7 72976.6
SUBJECT 2,287 2.6% 874 38.2% 213 3839.2 13017.0
MAJOR SUBJECT 376 0.4% 66 17.6% 157 4661.2 12647.4
EXACT SUBJECT 1,308 1.5% 315 24.1% 95 2246.9 7826.3
MAJOR XS 244 0.3% 42 17.2% 162 1569.4 4986.7
EXPLODE XS 318 0.4% 57 17.9% 61 5636.0 33452.7
EXPLODE MAJOR 150 0.2% 16 10.7% 496 10592.3 35054.3
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 3,940 4.4% 648 16.4% 13 305.4 2477.6
LANGUAGE 1,799 2.0% 92 5.1% 79 925.3 0.0
PUB TYPE 1,963 2.2% 117 6.0% 37 704.2 3927.8
Other indexes 2,911 3.3% 1,811 62.2% 1 5078.2 29063.6
By number of indexes:
Multiple 26,164 32.9% 5,469 20.9% 11 458.5 4829.6
Single 53,361 67.1% 12,156 22.8% 32 1547.6 10817.5
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 69 3.5% 6 8.7% 2 39.6 113.4
JOURNAL 458 23.3% 86 18.8% 1 6.0 17.1
EXACT JOURNAL 55 2.8% 15 27.3% 1 3.4 6.3
SUBJECT 1,294 65.9% 314 24.3% 2 48.9 405.7
EXACT SUBJECT 87 4.4% 11 12.6% 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 1,963 100% 432 22.0% 2 34.5 326.1
LIMITS:
Number of times limits (bit strings) used: 5,315
Use by bit string (percentage):
Current year minus 5 20.5%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.4%
Current year minus 1 0.1%
Current year 0.3%
English Language 35.5%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.5%
XS Animal 0.5%
XS Case Report 0.5%
XS Child 0.9%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 9.7%
XS Infant 0.0%
XS Infant, Newborn 0.2%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.3%
XS Rats 0.2%
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 23.8%
PT Journal Article 0.4%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 30,640
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.8%
Percentage of ORs 4.1%
Percentage of AND NOTs 3.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
BRIEF 62.2%
LONG 1.2%
MEDLINE 1.3%
FIELDS 4.0%
PERIODICALS 0.0%
BROWSE REVIEW 1.4%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 26.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.8%
Ten most frequent errors:
1. NS command - no next screen 36.2%
2. First word of command is invalid 25.9%
3. DISPLAY command - no FIND results 7.9%
4. FIND command with invalid index name 6.1%
5. DISPLAY command contains invalid word 3.7%
6. PS command - no previous screen 1.9%
7. Search term missing from search command 1.6%
8. Add-on search with invalid index name 1.6%
9. Valid command at an inappropriate time 1.4%
10. DISPLAY command-record numbers too large 0.9%
11. All others 12.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.7%
2. BOOKS DATABASE 14.0%
3. FIND 8.0%
4. MEDLINE BACKFILES 6.4%
5. Unrecognized term 5.6%
6. COMMANDS 5.5%
7. DATABASES 3.9%
8. INDEXES 3.2%
9. DISPLAY 2.8%
10. ADD-ON SEARCH 2.8%
11. All others 28.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.9%
2. First word of command is invalid 15.9%
3. FIND command with invalid index name 7.4%
4. DISPLAY command-first of >1 screen 7.1%
5. DISPLAY command - middle of >1 screen 5.3%
6. FIND command retrieves >1 book 4.2%
7. NS command - no next screen 3.3%
8. DISPLAY command - last of >1 screen 3.0%
9. NS of SHOW/EXP command-no next screen 2.8%
10. DISPLAY command-complete in one screen 2.5%
11. All others 29.1%
Ten most frequent SHOW requests:
1. HISTORY 64.8%
2. SEARCH 19.4%
3. MEDLINE NEWS 2.7%
4. SETTINGS 2.1%
5. MEDLINE GLOSSARY 2.1%
6. MAIL STATUS 2.1%
7. UPDATE 1.8%
8. DATABASES 1.1%
9. MEDLINE LOADING STATISTICS 0.9%
10. MEDLINE STATISTICS 0.9%
11. All others 2.1%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)