MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/07/01 through 07/13/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 59 523 582
Davis 9 494 104 607
Irvine 0 324 0 324
Los Angeles 0 10 110 120
Riverside 0 13 45 58
San Diego 100 427 44 571
San Francisco 109 0 1,293 1,402
Santa Barbara 0 4 48 52
Santa Cruz 3 2 71 76
Stanford 209
Other (including DLA) 0 0 2,126 2,126
_______________ _________ _________ _________
Total: 221 1,333 4,364 6,127
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,379 13,955 139,449
MED90 database 782 1,802 8,559
MED85 database 386 787 5,475
MED80 database 258 534 3,335
MED75 database 178 344 2,174
MED66 database 144 302 1,765
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 46 157 2,955
2-4 a.m. 35 99 638
4-6 a.m. 68 233 3,025
6-8 a.m. 137 326 2,716
8-10 a.m. 737 2,206 17,696
10-12 a.m. 1,211 3,446 32,027
12-2 p.m. 1,062 2,894 24,758
2-4 p.m. 1,240 3,617 29,470
4-6 p.m. 854 2,562 26,752
6-8 p.m. 353 972 8,015
8-10 p.m. 235 733 5,653
10-12 p.m. 149 479 7,052
__________ __________ __________ _________________
Total: 6,127 17,724 160,757
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 16:38 14:50 18:21 15:20
Median 12:23 9:41 14:28 10:19
Total:
Average 16:38 14:50 18:21 15:20
Median 12:23 9:41 14:28 10:19
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 6,127 100%
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 2.9
Retrievals per search - average 795.5
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7513.5
Percent of searches completed with 0 results 20.6%
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 13,070 26.3%
DISPLAY (excluding automatic displays) 16,602 33.4%
BROWSE 495 1.0%
SELECT 103 0.2%
HELP 250 0.5%
EXPLAIN 197 0.4%
SAVE 3,183 6.4%
SET/RESET 3,094 6.2%
SHOW 137 0.3%
ADD-ON (AND, OR, AND NOT) 4,016 8.1%
LOGON or LOGOFF 6,561 13.2%
COMMENT 0 0.0%
OTHER 2,063 4.1%
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 5,885 30.8% 1,189 20.2% 11 131.4 997.7
TITLE WORD 2,725 14.3% 934 34.3% 6 435.3 2856.3
EXACT TITLE 102 0.5% 47 46.1% 1 76.7 330.5
JOURNAL 1,042 5.5% 260 24.9% 224 1915.2 4970.6
EXACT JOURNAL 224 1.2% 58 25.9% 740 1994.9 3418.1
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 6,077 31.8% 1,124 18.5% 27 1422.5 12019.3
SUBJECT WORD 13 0.1% 6 46.2% 1,567 26576.6 42102.2
SUBJECT 412 2.2% 128 31.1% 254 3858.9 13408.5
MAJOR SUBJECT 48 0.3% 6 12.5% 205 2303.2 6560.0
EXACT SUBJECT 282 1.5% 75 26.6% 151 2841.6 10192.7
MAJOR XS 26 0.1% 4 15.4% 283 2863.8 5876.0
EXPLODE XS 144 0.8% 16 11.1% 195 8668.2 29355.6
EXPLODE MAJOR 52 0.3% 9 17.3% 376 15404.1 36532.7
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 1,063 5.6% 125 11.8% 24 177.8 507.6
LANGUAGE 393 2.1% 27 6.9% 86 727.0 0.0
PUB TYPE 491 2.6% 20 4.1% 25 250.0 1015.6
Other indexes 337 1.8% 53 15.7% 1 54.3 376.5
By number of indexes:
Multiple 6,022 35.3% 1,232 20.5% 9 388.5 5306.3
Single 11,035 64.7% 2,318 21.0% 32 1398.5 9918.3
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 10 2.0% 3 30.0% 2 27.9 44.9
JOURNAL 91 18.5% 18 19.8% 3 7.5 16.5
EXACT JOURNAL 2 0.4% 1 50.0% 8 8.0 0.0
SUBJECT 367 74.7% 66 18.0% 2 8.3 18.0
EXACT SUBJECT 21 4.3% 7 33.3% 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 491 100% 95 19.3% 2 8.2 18.3
LIMITS:
Number of times limits (bit strings) used: 1,117
Use by bit string (percentage):
Current year minus 5 28.0%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.4%
Current year minus 1 0.2%
Current year 0.0%
English Language 34.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 1.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.6%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 1.3%
XS Human 6.7%
XS Infant 0.0%
XS Infant, Newborn 0.0%
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 20.7%
PT Journal Article 0.0%
SUBSET AIM 3.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,000
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.0%
Percentage of ORs 3.8%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
BRIEF 64.2%
LONG 1.1%
MEDLINE 1.0%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 1.9%
BROWSE LONG 0.9%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.3%
Other 24.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 40.2%
2. First word of command is invalid 25.0%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 3.6%
5. Add-on search with invalid index name 2.1%
6. PS command - no previous screen 1.9%
7. Search term missing from search command 1.5%
8. DISPLAY command - no FIND results 1.2%
9. Valid command at an inappropriate time 1.2%
10. Command containing escape or arrow key 1.1%
11. All others 15.8%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.2%
2. MEDLINE BACKFILES 11.7%
3. FIND 8.1%
4. Unrecognized term 6.1%
5. COMMANDS 6.1%
6. DATABASES 5.6%
7. MAIL 4.6%
8. ADD-ON SEARCH 4.1%
9. 1752 2.5%
10. LOCATE (article dbs w/o monographs) 2.0%
11. All others 28.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.1%
2. First word of command is invalid 18.3%
3. FIND command with invalid index name 7.2%
4. DISPLAY command - middle of >1 screen 6.9%
5. FIND command retrieves >1 book 4.9%
6. NS command - no next screen 3.6%
7. DISPLAY command-complete in one screen 2.5%
8. NS of SHOW/EXP command-no next screen 2.2%
9. DISPLAY command-first of >1 screen 2.0%
10. 245 1.8%
11. All others 34.0%
Ten most frequent SHOW requests:
1. HISTORY 75.3%
2. MAIL STATUS 14.0%
3. SEARCH 5.4%
4. MAIL SETTINGS 2.2%
5. SETTINGS 2.2%
6. LOCATION 1.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)