MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/25/00 through 12/01/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 219 879 1,098
Davis 21 629 165 815
Irvine 0 412 0 412
Los Angeles 0 267 183 450
Riverside 0 48 151 199
San Diego 144 637 52 833
San Francisco 153 0 1,418 1,571
Santa Barbara 0 15 32 47
Santa Cruz 11 7 167 185
Stanford 256
Other (including DLA) 0 0 1,844 1,844
_______________ _________ _________ _________
Total: 329 2,234 4,891 7,710
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,738 17,763 193,083
MED90 database 900 1,911 11,220
MED85 database 455 803 5,043
MED80 database 312 584 3,068
MED75 database 176 330 1,493
MED66 database 129 243 1,077
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 82 285 3,779
2-4 a.m. 17 65 371
4-6 a.m. 27 63 851
6-8 a.m. 123 346 2,337
8-10 a.m. 857 1,989 20,392
10-12 a.m. 1,473 4,131 36,817
12-2 p.m. 1,344 3,801 44,731
2-4 p.m. 1,670 4,570 44,494
4-6 p.m. 1,014 2,909 31,443
6-8 p.m. 602 1,647 14,667
8-10 p.m. 315 1,064 8,542
10-12 p.m. 186 764 6,560
__________ __________ __________ _________________
Total: 7,710 21,634 214,984
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 16:41 13:46 15:57 13:41
Median 11:33 8:40 12:50 8:57
Total:
Average 16:41 13:46 15:57 13:41
Median 11:33 8:40 12:50 8:57
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.8
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 7,710 100%
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 876.9
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8609.3
Percent of searches completed with 0 results 20.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed 74.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,710 25.8%
DISPLAY (excluding automatic displays) 23,081 35.6%
BROWSE 384 0.6%
SELECT 237 0.4%
HELP 459 0.7%
EXPLAIN 425 0.7%
SAVE 3,767 5.8%
SET/RESET 3,391 5.2%
SHOW 213 0.3%
ADD-ON (AND, OR, AND NOT) 4,108 6.3%
LOGON or LOGOFF 9,117 14.1%
COMMENT 0 0.0%
OTHER 2,944 4.5%
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 6,887 29.8% 1,411 20.5% 11 98.4 604.3
TITLE WORD 2,968 12.9% 939 31.6% 8 499.5 5843.8
EXACT TITLE 119 0.5% 47 39.5% 1 20.6 54.6
JOURNAL 836 3.6% 272 32.5% 158 2372.2 7458.3
EXACT JOURNAL 315 1.4% 103 32.7% 383 1821.1 3867.2
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 8,497 36.8% 1,530 18.0% 30 1799.0 13692.2
SUBJECT WORD 25 0.1% 11 44.0% 197 1092.1 2607.6
SUBJECT 639 2.8% 246 38.5% 128 4667.5 16362.0
MAJOR SUBJECT 35 0.2% 2 5.7% 240 1541.5 4145.5
EXACT SUBJECT 308 1.3% 68 22.1% 139 1131.1 2356.8
MAJOR XS 69 0.3% 14 20.3% 278 2536.6 14269.5
EXPLODE XS 82 0.4% 9 11.0% 308 1420.8 3041.6
EXPLODE MAJOR 17 0.1% 3 17.6% 523 9593.9 27872.1
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 925 4.0% 125 13.5% 11 144.3 691.9
LANGUAGE 594 2.6% 35 5.9% 78 1033.5 0.0
PUB TYPE 376 1.6% 25 6.6% 37 173.3 472.4
Other indexes 374 1.6% 38 10.2% 1 25.5 133.5
By number of indexes:
Multiple 6,416 30.9% 1,354 21.1% 11 355.2 5074.2
Single 14,347 69.1% 2,887 20.1% 28 1488.7 11283.7
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 44 11.7% 4 9.1% 3 7.5 11.5
JOURNAL 86 22.9% 23 26.7% 1 37.1 235.5
EXACT JOURNAL 6 1.6% 0 0.0% 1 3.3 5.7
SUBJECT 219 58.2% 37 16.9% 2 54.7 630.5
EXACT SUBJECT 21 5.6% 1 4.8% 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 376 100% 65 17.3% 1 40.7 493.6
LIMITS:
Number of times limits (bit strings) used: 1,468
Use by bit string (percentage):
Current year minus 5 18.5%
Current year minus 4 0.0%
Current year minus 3 1.4%
Current year minus 2 0.3%
Current year minus 1 0.5%
Current year 0.1%
English Language 41.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.6%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.8%
XS Animal 0.0%
XS Case Report 0.2%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 7.2%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.1%
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 24.9%
PT Journal Article 0.2%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,483
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.7%
Percentage of ORs 3.3%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 63.8%
LONG 1.0%
MEDLINE 1.0%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
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 42.3%
2. First word of command is invalid 24.7%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 4.2%
5. PS command - no previous screen 2.3%
6. Add-on search with invalid index name 1.9%
7. NS of SHOW/EXP command-no next screen 1.8%
8. Search term missing from search command 1.7%
9. DISPLAY command-record numbers too large 1.1%
10. DISPLAY command - no FIND results 1.0%
11. All others 12.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 20.0%
2. BOOKS DATABASE 16.2%
3. FIND 8.5%
4. MEDLINE BACKFILES 7.5%
5. COMMANDS 5.6%
6. Unrecognized term 3.8%
7. DISPLAY 3.8%
8. INDEXES 3.3%
9. MAIL 3.1%
10. DATABASES 2.4%
11. All others 24.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.9%
2. First word of command is invalid 14.1%
3. FIND command with invalid index name 7.7%
4. DISPLAY command-first of >1 screen 7.0%
5. DISPLAY command - middle of >1 screen 6.1%
6. DISPLAY command-complete in one screen 5.0%
7. FIND command retrieves >1 book 4.5%
8. NS of SHOW/EXP command-no next screen 3.8%
9. DISPLAY command - last of >1 screen 3.1%
10. NS command - no next screen 2.9%
11. All others 25.9%
Ten most frequent SHOW requests:
1. HISTORY 74.1%
2. SEARCH 15.9%
3. SETTINGS 2.6%
4. MAIL STATUS 2.6%
5. MAIL SETTINGS 1.1%
6. MEDLINE GLOSSARY 1.1%
7. DISPLAY 0.5%
8. 0990 0.5%
9. LIBRARY LOCATIONS 0.5%
10. MEDLINE NEWS 0.5%
11. All others 0.5%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)