MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/07/01 through 04/13/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 213 527 740
Davis 23 868 76 967
Irvine 0 419 0 419
Los Angeles 0 29 93 122
Riverside 0 9 44 53
San Diego 89 443 33 565
San Francisco 94 0 1,474 1,568
Santa Barbara 0 5 9 14
Santa Cruz 9 6 78 93
Stanford 250
Other (including DLA) 0 0 1,951 1,951
_______________ _________ _________ _________
Total: 215 1,992 4,285 6,742
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,983 15,532 177,515
MED90 database 749 1,682 12,435
MED85 database 417 848 4,977
MED80 database 286 523 3,041
MED75 database 168 326 2,156
MED66 database 139 297 2,197
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 60 165 2,317
2-4 a.m. 16 39 488
4-6 a.m. 327 367 1,028
6-8 a.m. 161 494 4,968
8-10 a.m. 751 2,048 17,460
10-12 a.m. 1,246 3,539 36,822
12-2 p.m. 1,121 2,884 32,947
2-4 p.m. 1,206 3,774 39,859
4-6 p.m. 1,006 2,832 29,040
6-8 p.m. 415 1,261 15,474
8-10 p.m. 260 1,131 13,916
10-12 p.m. 173 674 8,002
__________ __________ __________ _________________
Total: 6,742 19,208 202,321
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 16:01 12:31 12:35 13:27
Median 8:39 6:45 11:41 7:40
Total:
Average 16:01 12:31 12:35 13:27
Median 8:39 6:45 11:41 7:40
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 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 6,742 100%
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 998.4
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8357.3
Percent of searches completed with 0 results 22.1%
Percent of searches entered that are long 0.4%
Percent of long searches completed 63.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,374 24.4%
DISPLAY (excluding automatic displays) 21,666 36.9%
BROWSE 367 0.6%
SELECT 130 0.2%
HELP 455 0.8%
EXPLAIN 328 0.6%
SAVE 3,578 6.1%
SET/RESET 3,266 5.6%
SHOW 148 0.3%
ADD-ON (AND, OR, AND NOT) 3,877 6.6%
LOGON or LOGOFF 7,917 13.5%
COMMENT 0 0.0%
OTHER 2,685 4.6%
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 5,488 27.0% 1,101 20.1% 15 110.2 604.9
TITLE WORD 3,187 15.7% 988 31.0% 12 671.7 3479.8
EXACT TITLE 228 1.1% 106 46.5% 1 40.4 283.5
JOURNAL 936 4.6% 272 29.1% 194 2655.2 8418.9
EXACT JOURNAL 255 1.3% 64 25.1% 290 2725.7 4863.8
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 6,906 34.0% 1,215 17.6% 31 1379.9 9281.3
SUBJECT WORD 50 0.2% 14 28.0% 13 398.9 1673.2
SUBJECT 554 2.7% 236 42.6% 381 5931.2 18876.0
MAJOR SUBJECT 71 0.3% 20 28.2% 65 3574.9 10726.2
EXACT SUBJECT 317 1.6% 81 25.6% 158 4118.7 10740.3
MAJOR XS 70 0.3% 15 21.4% 139 1644.2 2615.7
EXPLODE XS 95 0.5% 16 16.8% 27 3176.7 11635.4
EXPLODE MAJOR 31 0.2% 1 3.2% 76 11536.3 34364.8
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 875 4.3% 148 16.9% 17 367.9 2421.8
LANGUAGE 472 2.3% 28 5.9% 70 1005.4 0.0
PUB TYPE 366 1.8% 26 7.1% 28 456.4 2527.1
Other indexes 497 2.4% 319 64.2% 1 17175.3 54165.0
By number of indexes:
Multiple 5,995 32.9% 1,227 20.5% 14 544.8 5228.2
Single 12,207 67.1% 2,860 23.4% 34 1762.7 11312.5
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 23 6.3% 1 4.3% 4 31.6 75.0
JOURNAL 143 39.1% 28 19.6% 1 9.1 27.3
EXACT JOURNAL 10 2.7% 4 40.0% 1 6.7 13.9
SUBJECT 175 47.8% 35 20.0% 3 65.0 679.8
EXACT SUBJECT 15 4.1% 3 20.0% 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 366 100% 71 19.4% 2 36.9 469.0
LIMITS:
Number of times limits (bit strings) used: 1,216
Use by bit string (percentage):
Current year minus 5 20.6%
Current year minus 4 0.0%
Current year minus 3 1.1%
Current year minus 2 0.4%
Current year minus 1 0.1%
Current year 0.4%
English Language 39.3%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.2%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 1.8%
XS Child 0.7%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 9.9%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.2%
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 20.6%
PT Journal Article 0.8%
SUBSET AIM 1.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,886
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 90.1%
Percentage of ORs 4.1%
Percentage of AND NOTs 5.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 61.8%
LONG 1.5%
MEDLINE 1.1%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 38.1%
2. First word of command is invalid 25.9%
3. FIND command with invalid index name 6.6%
4. DISPLAY command - no FIND results 6.5%
5. DISPLAY command contains invalid word 2.8%
6. PS command - no previous screen 2.2%
7. Valid command at an inappropriate time 1.6%
8. Search term missing from search command 1.5%
9. Add-on search with invalid index name 1.3%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 19.8%
2. BOOKS DATABASE 14.3%
3. Unrecognized term 7.6%
4. MEDLINE BACKFILES 6.4%
5. FIND 6.4%
6. COMMANDS 4.9%
7. DATABASES 4.3%
8. DISPLAY 4.3%
9. INDEXES 2.7%
10. MAIL 2.4%
11. All others 27.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.1%
2. First word of command is invalid 15.1%
3. DISPLAY command - middle of >1 screen 8.3%
4. FIND command with invalid index name 7.9%
5. DISPLAY command-first of >1 screen 6.1%
6. DISPLAY command - last of >1 screen 3.8%
7. FIND command retrieves >1 book 3.3%
8. NS of SHOW/EXP command-no next screen 2.8%
9. DISPLAY command-complete in one screen 2.7%
10. PA command modified to Medline format 2.7%
11. All others 26.8%
Ten most frequent SHOW requests:
1. HISTORY 59.7%
2. SEARCH 20.1%
3. MEDLINE NEWS 5.8%
4. DATABASES 2.9%
5. MEDLINE GLOSSARY 2.2%
6. MEDLINE LOADING STATISTICS 2.2%
7. MEDLINE STATISTICS 2.2%
8. SETTINGS 1.4%
9. UPDATE 1.4%
10. TIMEOUT SETTING 0.7%
11. All others 1.4%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)