MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/22/01 through 09/28/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 77 461 538
Davis 18 324 61 403
Irvine 0 440 0 440
Los Angeles 0 25 91 116
Riverside 0 7 28 35
San Diego 112 461 14 587
San Francisco 69 0 932 1,001
Santa Barbara 0 5 8 13
Santa Cruz 0 2 33 35
Stanford 94
Other (including DLA) 0 0 1,868 1,868
_______________ _________ _________ _________
Total: 199 1,341 3,496 5,130
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,694 11,246 111,780
MED90 database 587 1,245 7,825
MED85 database 351 713 3,969
MED80 database 230 411 2,642
MED75 database 157 295 2,424
MED66 database 111 213 2,987
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 67 158 1,591
2-4 a.m. 22 99 1,568
4-6 a.m. 25 53 658
6-8 a.m. 100 292 2,656
8-10 a.m. 665 1,525 11,644
10-12 a.m. 985 2,492 23,038
12-2 p.m. 859 2,453 22,388
2-4 p.m. 1,054 3,077 25,884
4-6 p.m. 790 2,230 23,777
6-8 p.m. 311 857 7,753
8-10 p.m. 181 626 5,026
10-12 p.m. 71 261 5,644
__________ __________ __________ _________________
Total: 5,130 14,123 131,627
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 17:32 15:42 24:54 15:32
Median 11:08 10:37 11:31 10:43
Total:
Average 17:32 15:42 24:54 15:32
Median 11:08 10:37 11:31 10:43
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.7
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 5,130 100%
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 2.7
Retrievals per search - average 764.6
Retrievals per search - median 7.0
Retrievals per search - standard deviation 8658.8
Percent of searches completed with 0 results 21.6%
Percent of searches entered that are long 0.4%
Percent of long searches completed 61.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 10,532 25.3%
DISPLAY (excluding automatic displays) 14,787 35.5%
BROWSE 255 0.6%
SELECT 61 0.1%
HELP 229 0.5%
EXPLAIN 208 0.5%
SAVE 2,735 6.6%
SET/RESET 2,732 6.6%
SHOW 105 0.3%
ADD-ON (AND, OR, AND NOT) 2,898 7.0%
LOGON or LOGOFF 5,243 12.6%
COMMENT 0 0.0%
OTHER 1,889 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 4,591 31.0% 916 19.9% 12 109.9 619.2
TITLE WORD 2,212 14.9% 755 34.1% 5 343.0 3165.6
EXACT TITLE 163 1.1% 69 42.3% 1 18.6 89.3
JOURNAL 652 4.4% 203 31.1% 170 1668.6 4906.7
EXACT JOURNAL 251 1.7% 60 23.9% 1,534 2873.7 4132.3
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 5,014 33.8% 996 19.9% 31 1688.1 15057.1
SUBJECT WORD 25 0.2% 10 40.0% 116 18879.3 56770.1
SUBJECT 262 1.8% 98 37.4% 420 2276.1 5121.6
MAJOR SUBJECT 31 0.2% 3 9.7% 535 939.3 999.0
EXACT SUBJECT 128 0.9% 22 17.2% 71 4247.4 15275.8
MAJOR XS 42 0.3% 5 11.9% 39 223.8 497.5
EXPLODE XS 65 0.4% 13 20.0% 600 10198.7 20230.6
EXPLODE MAJOR 40 0.3% 14 35.0% 4 245.7 974.7
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 814 5.5% 117 14.4% 11 110.3 305.7
LANGUAGE 187 1.3% 4 2.1% 111 570.5 0.0
PUB TYPE 255 1.7% 34 13.3% 36 356.3 2291.4
Other indexes 136 0.9% 18 13.2% 1 50.0 300.6
By number of indexes:
Multiple 4,260 31.8% 957 22.5% 9 406.5 3126.1
Single 9,132 68.2% 1,991 21.8% 27 1316.3 11945.9
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 2 0.8% 0 0.0% 14 13.5 17.7
JOURNAL 35 13.7% 6 17.1% 2 2.6 3.7
EXACT JOURNAL 6 2.4% 0 0.0% 1 1.0 0.0
SUBJECT 189 74.1% 39 20.6% 2 13.0 45.6
EXACT SUBJECT 23 9.0% 4 17.4% 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 255 100% 49 19.2% 2 10.1 39.3
LIMITS:
Number of times limits (bit strings) used: 780
Use by bit string (percentage):
Current year minus 5 31.4%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.4%
Current year minus 1 0.8%
Current year 0.1%
English Language 28.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.3%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.3%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 10.0%
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 24.4%
PT Journal Article 0.3%
SUBSET AIM 1.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.6%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,793
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.0%
Percentage of ORs 2.9%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
BRIEF 63.2%
LONG 0.6%
MEDLINE 0.7%
FIELDS 3.3%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. NS command - no next screen 39.7%
2. First word of command is invalid 27.4%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 4.6%
5. PS command - no previous screen 2.5%
6. Add-on search with invalid index name 1.8%
7. Valid command at an inappropriate time 1.7%
8. DISPLAY command-record numbers too large 1.4%
9. Search term missing from search command 1.3%
10. Command containing escape or arrow key 1.1%
11. All others 12.0%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 26.9%
2. BOOKS DATABASE 13.5%
3. MEDLINE BACKFILES 10.6%
4. DATABASES 5.8%
5. Unrecognized term 5.3%
6. FIND 5.3%
7. DISPLAY 4.8%
8. MAIL 1.9%
9. SAVE 1.9%
10. ADD-ON SEARCH 1.9%
11. All others 23.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.3%
2. First word of command is invalid 16.2%
3. DISPLAY command-first of >1 screen 10.3%
4. FIND command with invalid index name 7.1%
5. DISPLAY command-complete in one screen 4.6%
6. DISPLAY command - middle of >1 screen 4.6%
7. FIND command retrieves >1 book 3.7%
8. NS command - no next screen 2.5%
9. DISPLAY command - last of >1 screen 2.5%
10. PS command - no previous screen 1.8%
11. All others 22.1%
Ten most frequent SHOW requests:
1. HISTORY 68.0%
2. SEARCH 12.4%
3. MAIL STATUS 9.3%
4. SETTINGS 2.1%
5. B990 1.0%
6. PAGESIZE 1.0%
7. MAIL SETTINGS 1.0%
8. DISPLAY 1.0%
9. MEDLINE GLOSSARY 1.0%
10. MEDLINE NEWS 1.0%
11. All others 2.1%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)