MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/03/00 through 06/09/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 197 907 1,104
Davis 25 776 237 1,038
Irvine 0 521 0 521
Los Angeles 0 572 265 837
Riverside 0 24 53 77
San Diego 181 870 79 1,130
San Francisco 122 0 2,062 2,184
Santa Barbara 0 14 51 65
Santa Cruz 49 9 53 111
Stanford 349
Other (including DLA) 0 0 2,441 2,441
_______________ _________ _________ _________
Total: 377 2,983 6,148 9,857
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,917 22,155 248,458
MED90 database 1,416 3,050 19,418
MED85 database 739 1,452 8,366
MED80 database 391 771 3,788
MED75 database 235 464 2,900
MED66 database 159 387 1,866
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 112 340 5,719
2-4 a.m. 33 82 934
4-6 a.m. 33 51 838
6-8 a.m. 186 564 4,046
8-10 a.m. 1,212 3,150 26,844
10-12 a.m. 1,871 5,503 51,263
12-2 p.m. 1,724 5,206 58,398
2-4 p.m. 2,011 5,510 55,842
4-6 p.m. 1,370 4,116 38,872
6-8 p.m. 569 1,606 15,874
8-10 p.m. 412 1,256 14,849
10-12 p.m. 324 895 11,317
__________ __________ __________ _________________
Total: 9,857 28,279 284,796
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 18:15 13:32 17:02 13:46
Median 12:12 7:43 11:36 8:17
Total:
Average 18:15 13:32 17:02 13:46
Median 12:12 7:43 11:36 8:17
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 3.4
transmission of response
Display - from receipt of command at DLA until 0.1 0.3
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 9,857 100%
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 669.1
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7034.7
Percent of searches completed with 0 results 21.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed 55.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 21,991 25.7%
DISPLAY (excluding automatic displays) 30,664 35.9%
BROWSE 398 0.5%
SELECT 278 0.3%
HELP 621 0.7%
EXPLAIN 532 0.6%
SAVE 5,767 6.8%
SET/RESET 4,441 5.2%
SHOW 255 0.3%
ADD-ON (AND, OR, AND NOT) 5,068 5.9%
LOGON or LOGOFF 11,356 13.3%
COMMENT 0 0.0%
OTHER 4,052 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 9,453 31.1% 1,875 19.8% 12 123.7 782.8
TITLE WORD 3,659 12.0% 1,153 31.5% 9 364.1 2219.8
EXACT TITLE 307 1.0% 155 50.5% 1 83.4 517.5
JOURNAL 1,340 4.4% 378 28.2% 106 2507.0 8446.9
EXACT JOURNAL 427 1.4% 114 26.7% 275 1256.3 2352.9
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 10,797 35.5% 2,120 19.6% 25 1173.9 11420.4
SUBJECT WORD 46 0.2% 23 50.0% 52 565.7 1884.8
SUBJECT 903 3.0% 366 40.5% 122 3279.7 13132.6
MAJOR SUBJECT 72 0.2% 8 11.1% 108 1060.3 3106.1
EXACT SUBJECT 263 0.9% 56 21.3% 104 1534.9 8183.2
MAJOR XS 30 0.1% 5 16.7% 185 725.9 1093.0
EXPLODE XS 110 0.4% 13 11.8% 95 4752.1 10766.4
EXPLODE MAJOR 27 0.1% 2 7.4% 6,600 16052.6 20300.5
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 1,403 4.6% 240 17.1% 11 141.6 892.4
LANGUAGE 594 2.0% 38 6.4% 62 457.7 0.0
PUB TYPE 393 1.3% 32 8.1% 35 879.8 5971.2
Other indexes 473 1.6% 105 22.2% 1 505.8 3735.2
By number of indexes:
Multiple 8,438 31.3% 1,896 22.5% 10 206.8 1772.7
Single 18,555 68.7% 3,865 20.8% 27 1186.6 9642.5
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 18 4.6% 3 16.7% 2 6.9 11.4
JOURNAL 57 14.5% 10 17.5% 1 3.4 5.4
EXACT JOURNAL 35 8.9% 7 20.0% 1 4.5 5.6
SUBJECT 269 68.4% 59 21.9% 3 31.1 333.3
EXACT SUBJECT 14 3.6% 5 35.7% 1 1.4 1.3
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 393 100% 84 21.4% 2 22.5 274.9
LIMITS:
Number of times limits (bit strings) used: 1,512
Use by bit string (percentage):
Current year minus 5 15.5%
Current year minus 4 0.0%
Current year minus 3 1.5%
Current year minus 2 0.4%
Current year minus 1 0.8%
Current year 0.5%
English Language 40.1%
French Language 0.4%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.1%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.2%
XS Aged 0.4%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 6.4%
XS Infant 0.1%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.0%
XS Support Non-U.S. Govt 0.1%
XS Support U.S. Govt, Non-P.H.S. 0.0%
XS Support U.S. Govt, P.H.S. 0.0%
PT Review 27.0%
PT Journal Article 0.3%
SUBSET AIM 4.4%
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: 9,645
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.6%
Percentage of ORs 2.4%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
BRIEF 63.5%
LONG 1.1%
MEDLINE 0.7%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.1%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 42.2%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 5.7%
4. DISPLAY command contains invalid word 3.7%
5. PS command - no previous screen 2.4%
6. Valid command at an inappropriate time 2.0%
7. Add-on search with invalid index name 1.4%
8. Search term missing from search command 1.2%
9. Command containing escape or arrow key 1.2%
10. DISPLAY command-record numbers too large 1.2%
11. All others 13.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.6%
2. LOCATE (article dbs w/o monographs) 12.2%
3. FIND 9.0%
4. Unrecognized term 6.8%
5. MEDLINE BACKFILES 6.8%
6. INDEXES 4.3%
7. MAIL 4.1%
8. COMMANDS 3.8%
9. DATABASES 3.2%
10. DISPLAY 2.6%
11. All others 28.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.3%
2. First word of command is invalid 15.4%
3. FIND command with invalid index name 6.2%
4. DISPLAY command-first of >1 screen 6.1%
5. DISPLAY command - middle of >1 screen 5.9%
6. FIND command retrieves >1 book 5.2%
7. DISPLAY command-complete in one screen 3.1%
8. DISPLAY command - last of >1 screen 3.1%
9. NS of SHOW/EXP command-no next screen 2.9%
10. NS command - no next screen 2.7%
11. All others 34.6%
Ten most frequent SHOW requests:
1. HISTORY 69.4%
2. SEARCH 19.2%
3. MAIL STATUS 6.8%
4. SETTINGS 1.4%
5. MEDLINE GLOSSARY 1.4%
6. DATABASES 0.9%
7. 0203 0.5%
8. MEDLINE LOADING STATISTICS 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)