MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/01/00 through 04/30/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,824 4,026 5,850
Davis 143 3,534 1,021 4,698
Irvine 0 2,649 0 2,649
Los Angeles 0 2,273 1,246 3,519
Riverside 0 238 368 606
San Diego 692 3,105 215 4,012
San Francisco 648 0 8,483 9,131
Santa Barbara 0 71 186 257
Santa Cruz 199 71 402 672
Stanford 1,741
Other (including DLA) 0 0 10,666 10,666
_______________ _________ _________ _________
Total: 1,682 13,765 26,613 43,801
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 31,398 835,786 1,149,712
MED90 database 5,591 12,898 99,867
MED85 database 2,959 5,997 47,961
MED80 database 1,896 3,786 32,658
MED75 database 1,097 2,349 17,721
MED66 database 860 2,053 18,304
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 508 24,265 18,982
2-4 a.m. 144 16,365 5,648
4-6 a.m. 179 8,176 4,965
6-8 a.m. 869 2,443 25,660
8-10 a.m. 4,628 27,469 128,080
10-12 a.m. 8,105 85,906 210,062
12-2 p.m. 7,417 88,195 213,871
2-4 p.m. 9,260 113,863 290,010
4-6 p.m. 6,832 161,248 243,949
6-8 p.m. 2,829 136,396 99,207
8-10 p.m. 1,859 129,459 76,911
10-12 p.m. 1,171 69,084 48,878
__________ __________ __________ _________________
Total: 43,801 862,869 1,366,223
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 15:16 14:07 16:04 14:10
Median 11:36 8:49 10:44 8:33
Total:
Average 15:16 14:07 16:04 14:10
Median 11:36 8:49 10:44 8:33
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.2 3.4
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 43,801 100%
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 19.7
Retrievals per search - average 145.2
Retrievals per search - median 0.0
Retrievals per search - standard deviation 2939.9
Percent of searches completed with 0 results 62.7%
Percent of searches entered that are long 0.1%
Percent of long searches completed 52.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 833,813 74.3%
DISPLAY (excluding automatic displays) 138,330 12.3%
BROWSE 1,909 0.2%
SELECT 1,172 0.1%
HELP 3,733 0.3%
EXPLAIN 2,895 0.3%
SAVE 27,126 2.4%
SET/RESET 19,722 1.8%
SHOW 1,379 0.1%
ADD-ON (AND, OR, AND NOT) 23,784 2.1%
LOGON or LOGOFF 50,303 4.5%
COMMENT 2 0.0%
OTHER 18,151 1.6%
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 38,916 2.4% 7,704 19.8% 11 97.9 595.9
TITLE WORD 15,711 1.0% 4,750 30.2% 7 396.7 3431.7
EXACT TITLE 1,124 0.1% 573 51.0% 1 49.5 260.0
JOURNAL 5,980 0.4% 1,788 29.9% 71 1978.4 6599.9
EXACT JOURNAL 737,298 45.9% 515149 69.9% 7 113.7 599.2
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 784,671 48.9% 523627 66.7% 9 322.7 4563.9
SUBJECT WORD 200 0.0% 104 52.0% 72 5335.4 24376.7
SUBJECT 4,566 0.3% 1,838 40.3% 214 3082.5 13347.9
MAJOR SUBJECT 356 0.0% 55 15.4% 114 1824.9 6704.9
EXACT SUBJECT 1,792 0.1% 384 21.4% 88 1712.2 6409.8
MAJOR XS 421 0.0% 106 25.2% 270 980.4 2293.2
EXPLODE XS 1,051 0.1% 164 15.6% 142 7434.1 35622.3
EXPLODE MAJOR 124 0.0% 9 7.3% 295 5614.7 17497.6
TREE NUMBER 6 0.0% 2 33.3% 368 7722.5 14911.1
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 5,811 0.4% 827 14.2% 9 154.0 1305.7
LANGUAGE 3,355 0.2% 147 4.4% 70 667.9 0.0
PUB TYPE 1,889 0.1% 182 9.6% 41 524.3 3821.2
Other indexes 2,000 0.1% 212 10.6% 1 496.5 5977.0
By number of indexes:
Multiple 773,505 90.4% 522744 67.6% 8 136.8 1895.1
Single 82,361 9.6% 16,739 20.3% 30 1370.3 9889.5
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 52 2.8% 11 21.2% 7 35.6 65.8
JOURNAL 335 17.7% 62 18.5% 2 13.1 40.7
EXACT JOURNAL 83 4.4% 15 18.1% 1 1.9 2.2
SUBJECT 1,335 70.7% 221 16.6% 2 13.1 90.8
EXACT SUBJECT 84 4.4% 12 14.3% 1 1.1 0.7
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 1,889 100% 321 17.0% 2 12.6 79.2
LIMITS:
Number of times limits (bit strings) used: 238,173
Use by bit string (percentage):
Current year minus 5 0.4%
Current year minus 4 0.0%
Current year minus 3 0.0%
Current year minus 2 0.0%
Current year minus 1 0.0%
Current year 0.0%
English Language 1.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.0%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 0.3%
XS Infant 0.0%
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 0.0%
XS Support U.S. Govt, Non-P.H.S. 0.0%
XS Support U.S. Govt, P.H.S. 0.0%
PT Review 0.9%
PT Journal Article 96.7%
SUBSET AIM 0.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 2,254,197
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 34.5%
Percentage of ORs 32.7%
Percentage of AND NOTs 32.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
BRIEF 72.2%
LONG 0.6%
MEDLINE 0.8%
FIELDS 2.4%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 21.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 4.3%
Ten most frequent errors:
1. NS command - no next screen 30.8%
2. First word of command is invalid 22.9%
3. 130 7.8%
4. FIND command with invalid index name 5.4%
5. DISPLAY command contains invalid word 3.2%
6. PS command - no previous screen 2.1%
7. Valid command at an inappropriate time 1.6%
8. Add-on search with invalid index name 1.5%
9. Search term missing from search command 1.4%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 22.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.3%
2. BOOKS DATABASE 13.4%
3. FIND 8.0%
4. MEDLINE BACKFILES 6.5%
5. Unrecognized term 6.4%
6. COMMANDS 5.1%
7. INDEXES 3.6%
8. DISPLAY 3.5%
9. ADD-ON SEARCH 3.2%
10. DATABASES 2.8%
11. All others 29.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.4%
2. First word of command is invalid 14.7%
3. FIND command with invalid index name 7.6%
4. DISPLAY command-first of >1 screen 6.3%
5. FIND command retrieves >1 book 4.7%
6. DISPLAY command - middle of >1 screen 4.5%
7. NS command - no next screen 3.3%
8. DISPLAY command - last of >1 screen 3.0%
9. DISPLAY command-complete in one screen 2.8%
10. NS of SHOW/EXP command-no next screen 2.6%
11. All others 29.0%
Ten most frequent SHOW requests:
1. HISTORY 68.4%
2. SEARCH 15.3%
3. MAIL STATUS 4.6%
4. SETTINGS 2.5%
5. MEDLINE GLOSSARY 2.1%
6. MEDLINE NEWS 2.1%
7. UPDATE 0.9%
8. 0876 0.8%
9. MAIL SETTINGS 0.7%
10. CLINICAL ALERTS 0.4%
11. All others 2.2%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)