MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/03/01 through 11/09/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 62 458 520
Davis 14 375 66 455
Irvine 0 297 0 297
Los Angeles 0 38 178 216
Riverside 0 3 43 46
San Diego 85 342 18 445
San Francisco 110 0 765 875
Santa Barbara 0 0 14 14
Santa Cruz 0 0 24 24
Stanford 99
Other (including DLA) 0 0 1,634 1,634
_______________ _________ _________ _________
Total: 209 1,117 3,200 4,625
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,317 9,929 110,256
MED90 database 563 1,154 8,679
MED85 database 303 621 10,315
MED80 database 187 384 8,608
MED75 database 127 283 7,429
MED66 database 128 266 8,972
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 34 112 1,235
2-4 a.m. 17 73 926
4-6 a.m. 13 25 262
6-8 a.m. 69 233 3,944
8-10 a.m. 558 1,517 15,833
10-12 a.m. 977 2,668 28,701
12-2 p.m. 878 2,329 21,811
2-4 p.m. 998 2,815 51,267
4-6 p.m. 572 1,543 15,396
6-8 p.m. 302 807 8,423
8-10 p.m. 145 347 4,235
10-12 p.m. 62 168 2,226
__________ __________ __________ _________________
Total: 4,625 12,637 154,259
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 25:04 14:01 31:25 15:26
Median 11:40 8:29 15:17 9:24
Total:
Average 25:04 14:01 31:25 15:26
Median 11:40 8:29 15:17 9:24
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.1
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 4,625 100%
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 861.3
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6599.4
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.6%
Percent of long searches completed 65.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,400 24.5%
DISPLAY (excluding automatic displays) 13,393 34.8%
BROWSE 390 1.0%
SELECT 69 0.2%
HELP 245 0.6%
EXPLAIN 170 0.4%
SAVE 3,203 8.3%
SET/RESET 2,395 6.2%
SHOW 101 0.3%
ADD-ON (AND, OR, AND NOT) 2,653 6.9%
LOGON or LOGOFF 4,767 12.4%
COMMENT 0 0.0%
OTHER 1,647 4.3%
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 3,821 28.4% 847 22.2% 12 132.4 720.7
TITLE WORD 1,860 13.8% 627 33.7% 6 282.5 1907.2
EXACT TITLE 70 0.5% 32 45.7% 2 13.9 32.9
JOURNAL 521 3.9% 181 34.7% 217 1665.1 4966.7
EXACT JOURNAL 191 1.4% 65 34.0% 471 3305.3 11173.0
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 4,804 35.6% 878 18.3% 31 1747.5 10247.5
SUBJECT WORD 16 0.1% 10 62.5% 20 118.7 196.0
SUBJECT 323 2.4% 92 28.5% 278 2758.4 8006.7
MAJOR SUBJECT 57 0.4% 10 17.5% 512 3325.3 6739.3
EXACT SUBJECT 279 2.1% 62 22.2% 89 2072.5 9052.7
MAJOR XS 60 0.4% 16 26.7% 261 956.6 1528.5
EXPLODE XS 52 0.4% 9 17.3% 45 6119.4 13308.9
EXPLODE MAJOR 25 0.2% 0 0.0% 216 11840.6 24790.4
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 747 5.5% 117 15.7% 15 147.1 496.0
LANGUAGE 314 2.3% 14 4.5% 89 1689.9 0.0
PUB TYPE 385 2.9% 8 2.1% 53 1090.8 10847.2
Other indexes 167 1.2% 18 10.8% 1 110.4 269.2
By number of indexes:
Multiple 4,053 33.7% 876 21.6% 13 848.4 7767.2
Single 7,957 66.3% 1,722 21.6% 33 1301.3 7526.8
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 0.3% 0 0.0% 7 7.0 0.0
JOURNAL 33 8.6% 4 12.1% 2 4.4 8.4
EXACT JOURNAL 8 2.1% 7 87.5% 1 1.0 0.0
SUBJECT 332 86.2% 74 22.3% 2 6.2 12.1
EXACT SUBJECT 11 2.9% 3 27.3% 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 385 100% 88 22.9% 2 5.8 11.6
LIMITS:
Number of times limits (bit strings) used: 995
Use by bit string (percentage):
Current year minus 5 27.6%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.4%
Current year minus 1 0.0%
Current year 0.1%
English Language 33.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.2%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 12.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.8%
XS Rats 0.0%
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 15.0%
PT Journal Article 0.6%
SUBSET AIM 4.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.9%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,710
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.5%
Percentage of ORs 4.4%
Percentage of AND NOTs 2.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
BRIEF 61.4%
LONG 1.0%
MEDLINE 0.5%
FIELDS 5.2%
PERIODICALS 0.0%
BROWSE REVIEW 1.7%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.4%
Other 25.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.8%
Ten most frequent errors:
1. NS command - no next screen 37.8%
2. First word of command is invalid 27.3%
3. FIND command with invalid index name 7.0%
4. DISPLAY command contains invalid word 4.2%
5. Add-on search with invalid index name 2.1%
6. Search term missing from search command 2.0%
7. PS command - no previous screen 2.0%
8. DISPLAY command - no FIND results 1.6%
9. Valid command at an inappropriate time 1.5%
10. DISPLAY command-record numbers too large 1.1%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 20.0%
2. LOCATE (article dbs w/o monographs) 11.2%
3. Unrecognized term 8.8%
4. FIND 7.6%
5. COMMANDS 7.6%
6. MEDLINE BACKFILES 5.3%
7. DISPLAY 4.7%
8. ADD-ON SEARCH 4.1%
9. DATABASES 3.5%
10. 1752 2.9%
11. All others 27.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.0%
2. First word of command is invalid 15.4%
3. DISPLAY command-first of >1 screen 8.0%
4. FIND command with invalid index name 7.0%
5. FIND command retrieves >1 book 5.5%
6. DISPLAY command - middle of >1 screen 4.6%
7. DISPLAY command-complete in one screen 2.9%
8. Multi-index search with zero results 2.9%
9. NS command - no next screen 2.7%
10. PS command - no previous screen 2.4%
11. All others 24.1%
Ten most frequent SHOW requests:
1. HISTORY 68.2%
2. SETTINGS 12.9%
3. SEARCH 8.2%
4. MEDLINE NEWS 5.9%
5. MAIL STATUS 3.5%
6. UPDATE 1.2%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)