MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/16/00 through 09/22/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 247 816 1,063
Davis 46 668 188 902
Irvine 0 414 0 414
Los Angeles 0 483 171 654
Riverside 0 17 50 67
San Diego 210 609 59 878
San Francisco 122 0 1,646 1,768
Santa Barbara 0 13 54 67
Santa Cruz 13 4 85 102
Stanford 282
Other (including DLA) 0 0 2,171 2,171
_______________ _________ _________ _________
Total: 391 2,455 5,240 8,368
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,074 19,425 215,576
MED90 database 1,080 2,433 13,894
MED85 database 534 1,082 5,670
MED80 database 326 676 3,269
MED75 database 202 410 2,380
MED66 database 152 308 2,136
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 128 318 3,380
2-4 a.m. 32 102 810
4-6 a.m. 41 115 905
6-8 a.m. 176 627 4,597
8-10 a.m. 926 2,439 22,170
10-12 a.m. 1,434 4,165 42,879
12-2 p.m. 1,589 4,702 45,727
2-4 p.m. 1,670 4,990 45,366
4-6 p.m. 1,362 3,963 46,096
6-8 p.m. 464 1,361 17,034
8-10 p.m. 284 875 7,983
10-12 p.m. 262 677 5,978
__________ __________ __________ _________________
Total: 8,368 24,334 242,925
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 13:40 14:11 17:47 13:57
Median 10:32 8:47 10:56 8:42
Total:
Average 13:40 14:11 17:47 13:57
Median 10:32 8:47 10:56 8:42
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.1
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 8,368 100%
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 854.0
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8597.8
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.4%
Percent of long searches completed 64.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,374 24.8%
DISPLAY (excluding automatic displays) 25,721 34.7%
BROWSE 374 0.5%
SELECT 184 0.2%
HELP 549 0.7%
EXPLAIN 478 0.6%
SAVE 6,279 8.5%
SET/RESET 3,893 5.3%
SHOW 325 0.4%
ADD-ON (AND, OR, AND NOT) 4,725 6.4%
LOGON or LOGOFF 9,469 12.8%
COMMENT 0 0.0%
OTHER 3,679 5.0%
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 8,205 31.6% 1,562 19.0% 12 104.0 618.4
TITLE WORD 3,165 12.2% 977 30.9% 7 626.4 3601.4
EXACT TITLE 140 0.5% 57 40.7% 1 150.4 586.6
JOURNAL 1,109 4.3% 361 32.6% 176 2684.8 6670.6
EXACT JOURNAL 419 1.6% 136 32.5% 315 2213.9 5956.9
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 8,704 33.5% 1,787 20.5% 27 1596.6 14205.6
SUBJECT WORD 38 0.1% 11 28.9% 310 10422.6 36686.6
SUBJECT 790 3.0% 291 36.8% 146 4409.3 13518.2
MAJOR SUBJECT 73 0.3% 11 15.1% 240 1878.4 6262.0
EXACT SUBJECT 477 1.8% 88 18.4% 75 1236.8 5115.3
MAJOR XS 51 0.2% 9 17.6% 115 1552.0 6556.3
EXPLODE XS 223 0.9% 41 18.4% 159 5697.0 26036.1
EXPLODE MAJOR 13 0.1% 3 23.1% 893 21504.8 56629.2
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 1,071 4.1% 158 14.8% 13 196.7 1045.5
LANGUAGE 630 2.4% 33 5.2% 71 897.2 0.0
PUB TYPE 368 1.4% 40 10.9% 40 499.7 2316.2
Other indexes 436 1.7% 40 9.2% 1 675.1 4763.3
By number of indexes:
Multiple 7,522 32.6% 1,680 22.3% 10 456.3 4290.6
Single 15,519 67.4% 3,175 20.5% 28 1458.6 11656.1
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 29 7.9% 1 3.4% 1 7.1 10.9
JOURNAL 69 18.8% 16 23.2% 2 15.0 53.2
EXACT JOURNAL 22 6.0% 2 9.1% 1 1.5 1.4
SUBJECT 229 62.2% 26 11.4% 2 26.6 195.5
EXACT SUBJECT 19 5.2% 2 10.5% 1 1.1 0.5
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 368 100% 47 12.8% 2 20.0 157.1
LIMITS:
Number of times limits (bit strings) used: 1,506
Use by bit string (percentage):
Current year minus 5 14.2%
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 0.3%
English Language 42.1%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.3%
XS Aged 1.5%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.7%
XS Human 11.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.3%
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 23.4%
PT Journal Article 0.1%
SUBSET AIM 1.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,765
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.0%
Percentage of ORs 3.6%
Percentage of AND NOTs 1.4%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 64.5%
LONG 1.0%
MEDLINE 1.7%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.6%
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 37.3%
2. First word of command is invalid 27.0%
3. FIND command with invalid index name 7.1%
4. DISPLAY command contains invalid word 4.4%
5. PS command - no previous screen 2.2%
6. Add-on search with invalid index name 2.1%
7. Valid command at an inappropriate time 2.0%
8. Search term missing from search command 1.9%
9. Command containing escape or arrow key 1.3%
10. DISPLAY command-record numbers too large 1.1%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.4%
2. LOCATE (article dbs w/o monographs) 10.7%
3. FIND 9.8%
4. MEDLINE BACKFILES 7.9%
5. Unrecognized term 5.4%
6. DATABASES 5.0%
7. ADD-ON SEARCH 4.8%
8. DISPLAY 4.0%
9. COMMANDS 4.0%
10. INDEXES 3.3%
11. All others 32.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.0%
2. First word of command is invalid 14.6%
3. FIND command with invalid index name 6.9%
4. DISPLAY command-first of >1 screen 5.3%
5. DISPLAY command - middle of >1 screen 4.3%
6. FIND command retrieves >1 book 4.2%
7. NS of SHOW/EXP command-no next screen 3.0%
8. NS command - no next screen 2.9%
9. FIND command with zero results 2.9%
10. DISPLAY command-complete in one screen 2.2%
11. All others 30.5%
Ten most frequent SHOW requests:
1. HISTORY 78.0%
2. SEARCH 11.6%
3. SETTINGS 2.7%
4. MAIL STATUS 1.5%
5. MEDLINE GLOSSARY 1.2%
6. MAIL SETTINGS 0.8%
7. MEDLINE LOADING STATISTICS 0.8%
8. DATABASES 0.8%
9. 0200 0.4%
10. 0634 0.4%
11. All others 1.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)