MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/01/99 through 08/31/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,391 5,194 6,585
Davis 279 5,057 1,344 6,680
Irvine 0 4,127 0 4,127
Los Angeles 0 3,717 1,514 5,231
Riverside 0 213 765 978
San Diego 731 3,802 415 4,948
San Francisco 492 0 13,609 14,101
Santa Barbara 0 122 287 409
Santa Cruz 161 51 484 696
Stanford 3,112
Other (including DLA) 0 0 14,112 14,112
_______________ _________ _________ _________
Total: 1,663 18,480 37,724 60,979
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 42,948 142,765 1,686,403
MED90 database 8,199 19,233 135,666
MED85 database 4,451 9,350 56,173
MED80 database 2,721 5,677 37,954
MED75 database 1,537 3,267 23,861
MED66 database 1,123 2,931 30,151
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 537 1,450 18,789
2-4 a.m. 168 423 4,528
4-6 a.m. 234 586 6,806
6-8 a.m. 1,141 3,308 32,242
8-10 a.m. 6,642 19,572 217,903
10-12 a.m. 11,826 34,920 358,316
12-2 p.m. 10,976 32,023 324,877
2-4 p.m. 12,912 39,797 420,079
4-6 p.m. 9,216 28,267 290,740
6-8 p.m. 3,743 11,611 156,377
8-10 p.m. 2,184 6,688 90,707
10-12 p.m. 1,400 4,578 48,844
__________ __________ __________ _________________
Total: 60,979 183,223 1,970,208
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 16:18 13:42 15:15 13:39
Median 10:55 8:02 10:36 8:07
Total:
Average 16:18 13:42 15:15 13:39
Median 10:55 8:02 10:36 8:07
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.2 4.1
transmission of response
Display - from receipt of command at DLA until 0.2 0.4
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 60,979 100%
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 3.0
Retrievals per search - average 625.1
Retrievals per search - median 8.0
Retrievals per search - standard deviation 5653.5
Percent of searches completed with 0 results 20.8%
Percent of searches entered that are long 0.3%
Percent of long searches completed 48.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 142,277 24.2%
DISPLAY (excluding automatic displays) 216,366 36.8%
BROWSE 17,786 3.0%
SELECT 1,788 0.3%
HELP 5,032 0.9%
EXPLAIN 3,880 0.7%
SAVE 42,463 7.2%
SET/RESET 27,662 4.7%
SHOW 2,249 0.4%
ADD-ON (AND, OR, AND NOT) 34,391 5.8%
LOGON or LOGOFF 69,769 11.9%
COMMENT 3 0.0%
OTHER 24,871 4.2%
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 59,826 30.3% 11,550 19.3% 11 96.8 576.7
TITLE WORD 21,380 10.8% 6,340 29.7% 6 366.2 2643.2
EXACT TITLE 1,890 1.0% 780 41.3% 1 20.0 136.6
JOURNAL 8,921 4.5% 2,779 31.1% 63 1531.7 5175.6
EXACT JOURNAL 2,914 1.5% 966 33.1% 224 1277.6 2820.1
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 71,546 36.2% 13,962 19.5% 27 1099.9 8152.7
SUBJECT WORD 270 0.1% 152 56.3% 34 2992.3 15132.0
SUBJECT 5,856 3.0% 2,397 40.9% 171 2432.8 7716.4
MAJOR SUBJECT 625 0.3% 109 17.4% 157 1131.5 2922.4
EXACT SUBJECT 2,515 1.3% 450 17.9% 79 1051.8 4886.8
MAJOR XS 426 0.2% 74 17.4% 205 976.3 2293.3
EXPLODE XS 1,452 0.7% 176 12.1% 159 6683.4 25648.8
EXPLODE MAJOR 198 0.1% 27 13.6% 723 4780.5 11768.0
TREE NUMBER 3 0.0% 1 33.3% 1,614 1614.0 1883.7
MAJOR TREE NUMBER 1 0.0% 0 0.0% 3,965 3965.0 0.0
DATE 8,443 4.3% 1,269 15.0% 10 517.3 7429.7
LANGUAGE 5,496 2.8% 321 5.8% 72 776.7 0.0
PUB TYPE 17,750 9.0% 215 1.2% 34 286.4 2493.8
Other indexes 2,770 1.4% 405 14.6% 1 129.3 1653.1
By number of indexes:
Multiple 55,686 31.6% 11,783 21.2% 10 372.2 4848.4
Single 120,363 68.4% 25,153 20.9% 26 1019.5 7072.6
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 161 0.9% 11 6.8% 3 27.0 103.7
JOURNAL 342 1.9% 86 25.1% 2 9.8 25.4
EXACT JOURNAL 150 0.8% 60 40.0% 1 2.8 4.8
SUBJECT 16,984 95.7% 601 3.5% 1 5.3 76.4
EXACT SUBJECT 108 0.6% 20 18.5% 1 3.2 7.2
TREE NUMBER 5 0.0% 0 0.0% 142 159.0 112.3
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 17,750 100% 778 4.4% 1 5.6 75.8
LIMITS:
Number of times limits (bit strings) used: 10,822
Use by bit string (percentage):
Current year minus 5 0.0%
Current year minus 4 0.0%
Current year minus 3 1.8%
Current year minus 2 0.4%
Current year minus 1 0.7%
Current year 0.5%
English Language 52.9%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.2%
XS Adult 0.5%
XS Aged 0.3%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 9.5%
XS Infant 0.0%
XS Infant, Newborn 0.2%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.0%
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 26.3%
PT Journal Article 0.3%
SUBSET AIM 4.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 64,119
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.9%
Percentage of ORs 3.1%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
BRIEF 57.2%
LONG 0.7%
MEDLINE 1.2%
FIELDS 2.3%
PERIODICALS 0.0%
BROWSE REVIEW 5.8%
BROWSE LONG 0.4%
BROWSE FIELDS 7.3%
BROWSE MEDLINE 0.0%
Other 23.6%
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 39.6%
2. First word of command is invalid 26.6%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 2.1%
6. Add-on search with invalid index name 1.7%
7. Valid command at an inappropriate time 1.7%
8. Search term missing from search command 1.5%
9. NS of SHOW/EXP command-no next screen 1.4%
10. Command containing escape or arrow key 1.2%
11. All others 14.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.3%
2. LOCATE (article dbs w/o monographs) 11.2%
3. FIND 9.8%
4. MEDLINE BACKFILES 8.0%
5. COMMANDS 5.9%
6. Unrecognized term 4.8%
7. INDEXES 4.1%
8. DISPLAY 3.9%
9. ADD-ON SEARCH 3.7%
10. DATABASES 3.6%
11. All others 29.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.1%
2. First word of command is invalid 14.8%
3. FIND command with invalid index name 6.7%
4. FIND command retrieves >1 book 5.4%
5. DISPLAY command-first of >1 screen 5.3%
6. DISPLAY command - middle of >1 screen 5.3%
7. NS command - no next screen 3.9%
8. NS of SHOW/EXP command-no next screen 2.8%
9. DISPLAY command - last of >1 screen 2.6%
10. FIND command with zero results 2.3%
11. All others 31.8%
Ten most frequent SHOW requests:
1. HISTORY 58.8%
2. SEARCH 17.4%
3. MAIL STATUS 11.8%
4. MAIL SETTINGS 2.8%
5. SETTINGS 2.8%
6. DLA NEWS 1.6%
7. MEDLINE GLOSSARY 0.9%
8. DLA5 NEWS 0.6%
9. DATABASES 0.6%
10. MEDLINE STATISTICS 0.4%
11. All others 2.2%