MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/28/01 through 05/04/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 168 610 778
Davis 13 736 72 821
Irvine 0 396 0 396
Los Angeles 0 12 209 221
Riverside 0 12 57 69
San Diego 99 520 93 712
San Francisco 165 0 1,291 1,456
Santa Barbara 0 4 9 13
Santa Cruz 26 7 47 80
Stanford 394
Other (including DLA) 0 0 1,938 1,938
_______________ _________ _________ _________
Total: 303 1,855 4,326 6,878
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,028 14,858 165,460
MED90 database 780 1,580 9,071
MED85 database 410 761 4,191
MED80 database 307 590 3,106
MED75 database 190 306 1,805
MED66 database 163 320 2,681
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 79 214 3,551
2-4 a.m. 139 202 1,338
4-6 a.m. 143 173 739
6-8 a.m. 161 376 3,210
8-10 a.m. 769 1,939 18,188
10-12 a.m. 1,219 3,348 35,739
12-2 p.m. 1,229 3,278 32,690
2-4 p.m. 1,269 3,476 31,470
4-6 p.m. 954 2,632 28,343
6-8 p.m. 502 1,564 18,390
8-10 p.m. 282 855 8,645
10-12 p.m. 132 358 4,011
__________ __________ __________ _________________
Total: 6,878 18,415 186,314
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 18:19 13:15 18:23 13:35
Median 9:21 6:48 12:41 7:10
Total:
Average 18:19 13:15 18:23 13:35
Median 9:21 6:48 12:41 7:10
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 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 6,878 100%
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 841.1
Retrievals per search - median 9.0
Retrievals per search - standard deviation 9302.9
Percent of searches completed with 0 results 21.3%
Percent of searches entered that are long 0.5%
Percent of long searches completed 65.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,132 24.9%
DISPLAY (excluding automatic displays) 20,278 35.7%
BROWSE 325 0.6%
SELECT 140 0.2%
HELP 318 0.6%
EXPLAIN 293 0.5%
SAVE 3,649 6.4%
SET/RESET 3,444 6.1%
SHOW 202 0.4%
ADD-ON (AND, OR, AND NOT) 3,379 5.9%
LOGON or LOGOFF 7,889 13.9%
COMMENT 0 0.0%
OTHER 2,765 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 6,225 31.4% 1,230 19.8% 12 134.6 1013.9
TITLE WORD 2,489 12.6% 758 30.5% 8 338.9 1681.1
EXACT TITLE 147 0.7% 51 34.7% 1 131.6 1091.1
JOURNAL 962 4.9% 282 29.3% 20 1798.7 7589.7
EXACT JOURNAL 236 1.2% 81 34.3% 340 3183.2 5521.1
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 6,743 34.1% 1,216 18.0% 30 1744.7 15137.2
SUBJECT WORD 19 0.1% 12 63.2% 7 10832.6 25606.3
SUBJECT 584 3.0% 201 34.4% 177 3411.1 11625.4
MAJOR SUBJECT 55 0.3% 5 9.1% 181 2158.0 3983.6
EXACT SUBJECT 239 1.2% 65 27.2% 57 1209.9 3061.5
MAJOR XS 38 0.2% 5 13.2% 1,410 3126.4 3358.4
EXPLODE XS 76 0.4% 13 17.1% 18 9911.3 35708.9
EXPLODE MAJOR 18 0.1% 1 5.6% 308 2104.1 5316.4
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 942 4.8% 167 17.7% 10 92.6 258.6
LANGUAGE 344 1.7% 23 6.7% 108 619.4 0.0
PUB TYPE 321 1.6% 25 7.8% 39 213.0 475.3
Other indexes 355 1.8% 231 65.1% 1 68.2 360.0
By number of indexes:
Multiple 5,712 32.7% 1,214 21.3% 10 299.5 3024.2
Single 11,753 67.3% 2,528 21.5% 31 1521.9 12918.3
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 12 3.7% 1 8.3% 2 3.5 4.3
JOURNAL 59 18.4% 5 8.5% 1 3.5 5.6
EXACT JOURNAL 6 1.9% 2 33.3% 1 1.0 0.0
SUBJECT 225 70.1% 62 27.6% 1 10.1 52.6
EXACT SUBJECT 19 5.9% 5 26.3% 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 321 100% 75 23.4% 1 7.7 43.0
LIMITS:
Number of times limits (bit strings) used: 1,129
Use by bit string (percentage):
Current year minus 5 23.2%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.3%
Current year minus 1 0.4%
Current year 0.5%
English Language 32.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.2%
XS Abstract 0.3%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.4%
XS Case Report 0.0%
XS Child 1.2%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 10.2%
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 25.2%
PT Journal Article 0.0%
SUBSET AIM 2.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,593
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.0%
Percentage of ORs 3.5%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
BRIEF 61.6%
LONG 1.1%
MEDLINE 1.0%
FIELDS 4.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 27.8%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.6%
Ten most frequent errors:
1. NS command - no next screen 37.7%
2. First word of command is invalid 26.2%
3. FIND command with invalid index name 5.9%
4. DISPLAY command - no FIND results 4.9%
5. DISPLAY command contains invalid word 4.1%
6. PS command - no previous screen 2.0%
7. Search term missing from search command 1.9%
8. Add-on search with invalid index name 1.5%
9. Valid command at an inappropriate time 1.4%
10. NS of SHOW/EXP command-no next screen 1.2%
11. All others 13.2%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 19.1%
2. BOOKS DATABASE 10.9%
3. FIND 9.6%
4. MEDLINE BACKFILES 7.8%
5. COMMANDS 5.1%
6. Unrecognized term 4.8%
7. MAIL 3.4%
8. DATABASES 3.4%
9. INDEXES 3.4%
10. DISPLAY 3.1%
11. All others 27.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.7%
2. First word of command is invalid 12.9%
3. FIND command with invalid index name 9.0%
4. DISPLAY command-first of >1 screen 8.0%
5. FIND command retrieves >1 book 4.7%
6. NS command - no next screen 3.6%
7. NS of SHOW/EXP command-no next screen 3.4%
8. DISPLAY command - middle of >1 screen 2.8%
9. DISPLAY command-complete in one screen 2.5%
10. PA command modified to Medline format 2.3%
11. All others 29.4%
Ten most frequent SHOW requests:
1. HISTORY 78.7%
2. SEARCH 16.3%
3. MAIL STATUS 2.1%
4. TIMEOUT SETTING 0.7%
5. MEDLINE GLOSSARY 0.7%
6. MEDLINE NEWS 0.7%
7. DATABASES 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)