MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/22/00 through 07/28/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 143 791 934
Davis 14 795 161 970
Irvine 0 526 0 526
Los Angeles 0 372 257 629
Riverside 0 21 82 103
San Diego 181 722 37 940
San Francisco 112 0 1,996 2,108
Santa Barbara 0 5 41 46
Santa Cruz 10 8 58 76
Stanford 331
Other (including DLA) 0 0 2,118 2,118
_______________ _________ _________ _________
Total: 317 2,592 5,541 8,781
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,313 20,240 231,567
MED90 database 1,111 2,371 16,012
MED85 database 622 1,340 6,762
MED80 database 380 734 4,042
MED75 database 210 399 1,727
MED66 database 145 335 2,374
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 92 196 1,681
2-4 a.m. 37 103 1,234
4-6 a.m. 39 89 1,132
6-8 a.m. 175 474 5,620
8-10 a.m. 966 2,896 24,790
10-12 a.m. 1,694 4,982 48,955
12-2 p.m. 1,421 3,902 35,508
2-4 p.m. 1,723 4,951 48,134
4-6 p.m. 1,494 3,936 38,120
6-8 p.m. 626 1,976 35,784
8-10 p.m. 343 1,166 12,477
10-12 p.m. 171 748 9,049
__________ __________ __________ _________________
Total: 8,781 25,419 262,484
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 11:19 14:11 15:48 13:54
Median 7:42 9:08 11:54 9:12
Total:
Average 11:19 14:11 15:48 13:54
Median 7:42 9:08 11:54 9:12
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.8
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 8,781 100%
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 814.8
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6659.6
Percent of searches completed with 0 results 20.4%
Percent of searches entered that are long 0.3%
Percent of long searches completed 61.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 19,672 25.5%
DISPLAY (excluding automatic displays) 27,095 35.1%
BROWSE 396 0.5%
SELECT 214 0.3%
HELP 509 0.7%
EXPLAIN 445 0.6%
SAVE 6,304 8.2%
SET/RESET 4,024 5.2%
SHOW 292 0.4%
ADD-ON (AND, OR, AND NOT) 4,660 6.0%
LOGON or LOGOFF 10,027 13.0%
COMMENT 0 0.0%
OTHER 3,502 4.5%
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 8,705 31.7% 1,640 18.8% 15 122.8 778.6
TITLE WORD 3,302 12.0% 1,055 31.9% 6 360.1 2723.5
EXACT TITLE 187 0.7% 79 42.2% 1 9.4 23.9
JOURNAL 1,135 4.1% 371 32.7% 127 2081.8 5415.6
EXACT JOURNAL 333 1.2% 108 32.4% 264 1507.9 3070.5
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 9,555 34.8% 1,918 20.1% 28 1235.5 8149.5
SUBJECT WORD 15 0.1% 10 66.7% 6 240.8 523.4
SUBJECT 628 2.3% 223 35.5% 137 2771.2 7602.0
MAJOR SUBJECT 69 0.3% 9 13.0% 951 3128.5 6748.6
EXACT SUBJECT 408 1.5% 59 14.5% 98 11359.9 36244.0
MAJOR XS 70 0.3% 8 11.4% 110 809.7 1567.1
EXPLODE XS 213 0.8% 34 16.0% 458 27396.1 46735.8
EXPLODE MAJOR 26 0.1% 0 0.0% 215 1482.4 3419.5
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 1,092 4.0% 156 14.3% 10 180.0 821.5
LANGUAGE 751 2.7% 58 7.7% 53 847.7 0.0
PUB TYPE 393 1.4% 42 10.7% 38 639.6 2575.6
Other indexes 525 1.9% 57 10.9% 1 450.9 3342.1
By number of indexes:
Multiple 7,703 31.7% 1,663 21.6% 11 1206.1 10900.5
Single 16,566 68.3% 3,339 20.2% 28 1002.8 5498.4
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 34 8.7% 3 8.8% 2 12.1 26.6
JOURNAL 79 20.1% 18 22.8% 1 11.7 30.3
EXACT JOURNAL 17 4.3% 6 35.3% 1 1.4 1.2
SUBJECT 242 61.6% 52 21.5% 2 9.9 42.1
EXACT SUBJECT 21 5.3% 1 4.8% 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 393 100% 80 20.4% 2 9.6 36.4
LIMITS:
Number of times limits (bit strings) used: 1,631
Use by bit string (percentage):
Current year minus 5 14.2%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.3%
Current year minus 1 0.2%
Current year 0.1%
English Language 47.6%
French Language 0.0%
Japanese Language 0.1%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.7%
XS Adult 0.1%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.9%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.1%
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 22.3%
PT Journal Article 0.0%
SUBSET AIM 2.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 8,991
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.6%
Percentage of ORs 4.5%
Percentage of AND NOTs 0.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 64.2%
LONG 1.0%
MEDLINE 1.0%
FIELDS 4.2%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.2%
Ten most frequent errors:
1. NS command - no next screen 40.7%
2. First word of command is invalid 26.4%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.5%
5. PS command - no previous screen 2.0%
6. Valid command at an inappropriate time 2.0%
7. Add-on search with invalid index name 1.8%
8. Search term missing from search command 1.5%
9. NS of SHOW/EXP command-no next screen 1.0%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.2%
2. LOCATE (article dbs w/o monographs) 11.5%
3. MEDLINE BACKFILES 10.8%
4. FIND 9.0%
5. Unrecognized term 4.9%
6. DATABASES 4.7%
7. DISPLAY 3.1%
8. COMMANDS 3.1%
9. MAIL 2.7%
10. DATES INDEX 2.7%
11. All others 28.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.2%
2. First word of command is invalid 17.0%
3. DISPLAY command-first of >1 screen 8.4%
4. FIND command with invalid index name 6.2%
5. DISPLAY command - middle of >1 screen 3.1%
6. FIND command retrieves >1 book 2.7%
7. DISPLAY command - last of >1 screen 2.7%
8. NS command - no next screen 2.6%
9. FIND command with zero results 2.3%
10. NS of SHOW/EXP command-no next screen 2.2%
11. All others 33.3%
Ten most frequent SHOW requests:
1. HISTORY 64.6%
2. SEARCH 18.4%
3. MAIL STATUS 7.2%
4. UPDATE 3.6%
5. MEDLINE GLOSSARY 2.7%
6. SETTINGS 1.3%
7. MAIL SETTINGS 0.9%
8. 0605 0.4%
9. FIND DISPLAY 0.4%
10. MEDLINE LOADING STATISTICS 0.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)