MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/08/01 through 09/14/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 37 461 498
Davis 18 342 55 415
Irvine 0 311 0 311
Los Angeles 0 15 84 99
Riverside 0 9 37 46
San Diego 88 338 43 469
San Francisco 94 0 762 856
Santa Barbara 0 3 8 11
Santa Cruz 0 0 46 46
Stanford 76
Other (including DLA) 0 0 1,764 1,764
_______________ _________ _________ _________
Total: 200 1,055 3,260 4,591
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,298 9,465 108,177
MED90 database 566 1,162 6,603
MED85 database 294 563 2,417
MED80 database 199 365 1,817
MED75 database 133 254 1,038
MED66 database 101 236 1,536
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 19 80 800
2-4 a.m. 25 43 1,130
4-6 a.m. 38 89 1,279
6-8 a.m. 95 214 1,872
8-10 a.m. 700 1,775 14,859
10-12 a.m. 985 2,421 21,579
12-2 p.m. 749 1,958 19,082
2-4 p.m. 930 2,639 21,507
4-6 p.m. 611 1,588 19,108
6-8 p.m. 250 696 7,537
8-10 p.m. 117 323 9,546
10-12 p.m. 72 219 3,289
__________ __________ __________ _________________
Total: 4,591 12,045 121,588
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 15:14 15:15 12:38 14:41
Median 12:05 9:21 12:03 10:01
Total:
Average 15:14 15:15 12:38 14:41
Median 12:05 9:21 12:03 10:01
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.4
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 4,591 100%
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 2.6
Retrievals per search - average 723.6
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6021.1
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.3%
Percent of long searches completed 69.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,033 26.1%
DISPLAY (excluding automatic displays) 11,573 33.4%
BROWSE 247 0.7%
SELECT 91 0.3%
HELP 183 0.5%
EXPLAIN 151 0.4%
SAVE 2,078 6.0%
SET/RESET 2,430 7.0%
SHOW 104 0.3%
ADD-ON (AND, OR, AND NOT) 2,514 7.3%
LOGON or LOGOFF 4,704 13.6%
COMMENT 0 0.0%
OTHER 1,555 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 4,031 31.0% 778 19.3% 11 140.0 901.2
TITLE WORD 1,811 13.9% 621 34.3% 6 430.0 2699.3
EXACT TITLE 88 0.7% 40 45.5% 2 22.8 87.8
JOURNAL 675 5.2% 201 29.8% 102 2100.4 5251.8
EXACT JOURNAL 214 1.6% 62 29.0% 630 2399.0 4567.9
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 4,283 32.9% 861 20.1% 23 1190.9 7203.3
SUBJECT WORD 33 0.3% 17 51.5% 105 1217.6 2972.2
SUBJECT 239 1.8% 100 41.8% 703 5458.1 17344.1
MAJOR SUBJECT 22 0.2% 1 4.5% 495 858.3 975.6
EXACT SUBJECT 118 0.9% 23 19.5% 99 2207.3 10743.2
MAJOR XS 18 0.1% 1 5.6% 152 1837.8 5307.5
EXPLODE XS 52 0.4% 3 5.8% 166 18154.4 52026.5
EXPLODE MAJOR 4 0.0% 0 0.0% 48,176 60690.5 72720.3
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 901 6.9% 100 11.1% 13 208.2 1457.8
LANGUAGE 226 1.7% 8 3.5% 68 714.6 0.0
PUB TYPE 244 1.9% 7 2.9% 54 189.8 357.8
Other indexes 162 1.2% 24 14.8% 1 38.7 154.4
By number of indexes:
Multiple 3,879 33.6% 797 20.5% 9 324.4 3896.0
Single 7,649 66.3% 1,717 22.4% 26 1287.0 8057.3
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 5 2.0% 0 0.0% 12 9.6 3.9
JOURNAL 45 18.4% 10 22.2% 2 67.1 376.6
EXACT JOURNAL 3 1.2% 0 0.0% 1 1.3 0.6
SUBJECT 174 71.3% 34 19.5% 2 6.1 9.4
EXACT SUBJECT 17 7.0% 1 5.9% 5 7.6 8.4
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 244 100% 45 18.4% 2 16.9 158.0
LIMITS:
Number of times limits (bit strings) used: 759
Use by bit string (percentage):
Current year minus 5 38.7%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.5%
Current year minus 1 0.1%
Current year 0.4%
English Language 31.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.3%
XS Adolescence 0.1%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.0%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.8%
XS Rats 0.1%
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 14.8%
PT Journal Article 0.3%
SUBSET AIM 3.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,378
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.4%
Percentage of ORs 2.2%
Percentage of AND NOTs 1.4%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
BRIEF 61.7%
LONG 1.2%
MEDLINE 0.9%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.4%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.4%
Other 27.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 39.0%
2. First word of command is invalid 26.8%
3. FIND command with invalid index name 7.9%
4. DISPLAY command contains invalid word 4.5%
5. Search term missing from search command 2.2%
6. PS command - no previous screen 1.8%
7. Add-on search with invalid index name 1.6%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command-record numbers too large 1.1%
10. DISPLAY command - no FIND results 1.0%
11. All others 12.8%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.6%
2. Unrecognized term 11.9%
3. LOCATE (article dbs w/o monographs) 9.9%
4. FIND 9.3%
5. MEDLINE BACKFILES 7.9%
6. DISPLAY 5.3%
7. PERIODICALS 2.6%
8. INDEXES 2.6%
9. 3318 2.6%
10. SETTINGS 2.6%
11. All others 26.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.3%
2. First word of command is invalid 13.2%
3. FIND command with invalid index name 8.7%
4. DISPLAY command-first of >1 screen 7.2%
5. DISPLAY command - middle of >1 screen 5.7%
6. FIND command retrieves >1 book 5.4%
7. NS command - no next screen 2.4%
8. DISPLAY command-complete in one screen 2.4%
9. NS of SHOW/EXP command-no next screen 2.4%
10. DISPLAY command - last of >1 screen 2.1%
11. All others 32.5%
Ten most frequent SHOW requests:
1. HISTORY 48.8%
2. MAIL STATUS 22.0%
3. SEARCH 19.5%
4. MAIL SETTINGS 2.4%
5. SETTINGS 2.4%
6. MEDLINE NEWS 2.4%
7. MEDLINE GLOSSARY 1.2%
8. DATABASES 1.2%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)