MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/24/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 105 513 618
Davis 15 390 85 490
Irvine 0 187 0 187
Los Angeles 0 10 74 84
Riverside 0 4 26 30
San Diego 79 311 5 395
San Francisco 80 0 1,101 1,181
Santa Barbara 0 1 18 19
Santa Cruz 0 5 28 33
Stanford 67
Other (including DLA) 0 0 1,591 1,591
_______________ _________ _________ _________
Total: 174 1,013 3,441 4,695
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,315 9,658 152,046
MED90 database 600 1,269 17,874
MED85 database 345 687 14,772
MED80 database 201 394 5,024
MED75 database 135 262 3,177
MED66 database 99 196 3,119
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 28 95 1,251
2-4 a.m. 11 33 398
4-6 a.m. 12 37 355
6-8 a.m. 130 286 2,238
8-10 a.m. 574 1,442 20,208
10-12 a.m. 944 2,373 29,970
12-2 p.m. 812 2,385 62,327
2-4 p.m. 994 2,647 36,591
4-6 p.m. 659 1,855 24,294
6-8 p.m. 213 644 11,197
8-10 p.m. 186 387 4,064
10-12 p.m. 132 282 3,119
__________ __________ __________ _________________
Total: 4,695 12,466 196,012
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 19:22 14:49 14:53 14:34
Median 12:06 8:01 12:49 8:31
Total:
Average 19:22 14:49 14:53 14:34
Median 12:06 8:01 12:49 8:31
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.3
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 4,695 100%
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 914.9
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8340.1
Percent of searches completed with 0 results 20.1%
Percent of searches entered that are long 0.4%
Percent of long searches completed 70.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,129 24.2%
DISPLAY (excluding automatic displays) 13,228 35.0%
BROWSE 187 0.5%
SELECT 42 0.1%
HELP 194 0.5%
EXPLAIN 171 0.5%
SAVE 3,005 8.0%
SET/RESET 2,475 6.6%
SHOW 101 0.3%
ADD-ON (AND, OR, AND NOT) 2,727 7.2%
LOGON or LOGOFF 4,818 12.8%
COMMENT 0 0.0%
OTHER 1,666 4.4%
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 3,840 29.2% 760 19.8% 13 126.4 598.8
TITLE WORD 2,184 16.6% 623 28.5% 13 1487.4 4715.2
EXACT TITLE 104 0.8% 49 47.1% 2 132.6 784.5
JOURNAL 587 4.5% 156 26.6% 137 2808.9 9931.3
EXACT JOURNAL 287 2.2% 78 27.2% 749 2406.1 4070.2
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 4,089 31.1% 738 18.0% 28 1509.8 12163.1
SUBJECT WORD 35 0.3% 6 17.1% 9 17696.8 91854.9
SUBJECT 268 2.0% 96 35.8% 183 2635.6 6583.9
MAJOR SUBJECT 46 0.3% 8 17.4% 333 3212.9 9718.7
EXACT SUBJECT 238 1.8% 63 26.5% 135 1381.3 5650.7
MAJOR XS 44 0.3% 4 9.1% 87 583.8 1112.6
EXPLODE XS 61 0.5% 13 21.3% 15 4685.2 15016.5
EXPLODE MAJOR 16 0.1% 1 6.3% 948 4665.6 11818.5
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 752 5.7% 103 13.7% 19 200.4 594.2
LANGUAGE 225 1.7% 13 5.8% 107 588.6 0.0
PUB TYPE 186 1.4% 12 6.5% 53 533.7 3314.7
Other indexes 186 1.4% 23 12.4% 1 6.4 30.9
By number of indexes:
Multiple 3,930 33.2% 793 20.2% 11 450.0 9138.5
Single 7,896 66.8% 1,627 20.6% 33 1576.0 9748.8
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 1 0.5% 1 100% 0 0.0 0.0
JOURNAL 33 17.7% 5 15.2% 2 4.2 6.1
EXACT JOURNAL 9 4.8% 1 11.1% 1 2.0 2.4
SUBJECT 116 62.4% 35 30.2% 2 6.9 12.9
EXACT SUBJECT 27 14.5% 4 14.8% 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 186 100% 46 24.7% 2 5.1 10.5
LIMITS:
Number of times limits (bit strings) used: 834
Use by bit string (percentage):
Current year minus 5 32.1%
Current year minus 4 0.0%
Current year minus 3 1.6%
Current year minus 2 0.2%
Current year minus 1 0.1%
Current year 0.0%
English Language 27.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.1%
XS Adolescence 0.1%
XS Adult 0.0%
XS Aged 1.7%
XS Animal 1.3%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 13.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.0%
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 19.4%
PT Journal Article 0.1%
SUBSET AIM 1.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,770
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 89.5%
Percentage of ORs 9.4%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
BRIEF 61.8%
LONG 1.4%
MEDLINE 1.1%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 26.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.5%
Ten most frequent errors:
1. NS command - no next screen 37.6%
2. First word of command is invalid 24.3%
3. FIND command with invalid index name 6.7%
4. DISPLAY command contains invalid word 5.0%
5. Add-on search with invalid index name 2.3%
6. PS command - no previous screen 2.3%
7. Valid command at an inappropriate time 1.8%
8. Search term missing from search command 1.7%
9. DISPLAY command - no FIND results 1.5%
10. 1185 1.4%
11. All others 15.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.2%
2. FIND 9.9%
3. LOCATE (article dbs w/o monographs) 9.4%
4. MEDLINE BACKFILES 8.2%
5. Unrecognized term 5.8%
6. INDEXES 5.3%
7. 1752 4.1%
8. DISPLAY 4.1%
9. DATABASES 3.5%
10. MAIL 2.9%
11. All others 27.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.6%
2. First word of command is invalid 11.2%
3. FIND command with invalid index name 10.4%
4. DISPLAY command - middle of >1 screen 6.6%
5. DISPLAY command-first of >1 screen 6.3%
6. FIND command retrieves >1 book 4.4%
7. DISPLAY command-complete in one screen 3.8%
8. Add-on without index name 3.3%
9. PS command - no previous screen 2.7%
10. FIND command retrieves 1 book 2.5%
11. All others 31.6%
Ten most frequent SHOW requests:
1. HISTORY 63.6%
2. SEARCH 14.8%
3. MEDLINE NEWS 10.2%
4. MAIL STATUS 3.4%
5. UPDATE 3.4%
6. 0241 2.3%
7. 0240 1.1%
8. MEDLINE GLOSSARY 1.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)