MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/22/01 through 12/28/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 0 66 66
Davis 8 129 21 158
Irvine 0 23 0 23
Los Angeles 0 2 9 11
Riverside 0 0 8 8
San Diego 15 125 17 157
San Francisco 0 0 389 389
Santa Barbara 0 1 4 5
Santa Cruz 0 0 10 10
Stanford 24
Other (including DLA) 0 0 708 708
_______________ _________ _________ _________
Total: 23 280 1,232 1,559
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 1,133 3,691 41,515
MED90 database 181 448 2,721
MED85 database 106 251 1,494
MED80 database 66 182 633
MED75 database 37 130 482
MED66 database 36 144 614
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 101 2,568
2-4 a.m. 25 68 506
4-6 a.m. 26 49 1,154
6-8 a.m. 49 155 1,912
8-10 a.m. 148 333 3,126
10-12 a.m. 335 972 8,540
12-2 p.m. 310 1,135 9,907
2-4 p.m. 290 928 7,581
4-6 p.m. 155 542 4,990
6-8 p.m. 82 208 2,585
8-10 p.m. 85 232 3,401
10-12 p.m. 31 123 1,189
__________ __________ __________ _________________
Total: 1,559 4,846 47,459
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 14:26 15:20 15:45 14:22
Median 13:43 9:49 13:40 7:57
Total:
Average 14:26 15:20 15:45 14:22
Median 13:43 9:49 13:40 7:57
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.2
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 1,559 100%
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 3.1
Retrievals per search - average 376.9
Retrievals per search - median 4.0
Retrievals per search - standard deviation 3342.3
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 0.4%
Percent of long searches completed 64.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 3,874 27.5%
DISPLAY (excluding automatic displays) 5,099 36.2%
BROWSE 41 0.3%
SELECT 14 0.1%
HELP 42 0.3%
EXPLAIN 37 0.3%
SAVE 1,154 8.2%
SET/RESET 757 5.4%
SHOW 33 0.2%
ADD-ON (AND, OR, AND NOT) 758 5.4%
LOGON or LOGOFF 1,664 11.8%
COMMENT 0 0.0%
OTHER 630 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 1,605 31.0% 385 24.0% 10 96.1 400.5
TITLE WORD 944 18.2% 512 54.2% 7 362.1 2277.1
EXACT TITLE 3 0.1% 0 0.0% 314 273.0 249.0
JOURNAL 191 3.7% 61 31.9% 301 1137.6 2576.9
EXACT JOURNAL 34 0.7% 6 17.6% 710 1784.9 4043.8
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 1,824 35.2% 477 26.1% 23 957.6 6051.5
SUBJECT WORD 1 0.0% 1 100% 0 0.0 0.0
SUBJECT 122 2.4% 49 40.2% 16 367.4 1107.4
MAJOR SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
EXACT SUBJECT 39 0.8% 21 53.8% 26 613.4 1290.0
MAJOR XS 0 0.0% 0 0.0% 0 0.0 0.0
EXPLODE XS 1 0.0% 0 0.0% 3 3.0 0.0
EXPLODE MAJOR 0 0.0% 0 0.0% 0 0.0 0.0
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 248 4.8% 45 18.1% 10 85.7 196.8
LANGUAGE 57 1.1% 3 5.3% 63 182.7 0.0
PUB TYPE 41 0.8% 1 2.4% 32 173.3 348.4
Other indexes 33 0.6% 5 15.2% 1 1.0 0.0
By number of indexes:
Multiple 1,342 29.0% 358 26.7% 7 152.7 1009.0
Single 3,282 71.0% 1,001 30.5% 24 730.1 4797.5
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 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 4 9.8% 1 25.0% 4 3.0 1.7
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 37 90.2% 11 29.7% 2 5.9 11.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 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 41 100% 12 29.3% 2 5.6 10.8
LIMITS:
Number of times limits (bit strings) used: 240
Use by bit string (percentage):
Current year minus 5 27.1%
Current year minus 4 0.0%
Current year minus 3 1.7%
Current year minus 2 0.0%
Current year minus 1 0.8%
Current year 0.4%
English Language 25.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
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 8.7%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 3.3%
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 32.1%
PT Journal Article 0.0%
SUBSET AIM 0.0%
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: 1,583
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.4%
Percentage of ORs 2.7%
Percentage of AND NOTs 0.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.9%
BRIEF 60.3%
LONG 1.3%
MEDLINE 4.1%
FIELDS 2.3%
PERIODICALS 0.0%
BROWSE REVIEW 0.5%
BROWSE LONG 0.2%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.4%
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 42.7%
2. First word of command is invalid 24.0%
3. DISPLAY command contains invalid word 6.1%
4. FIND command with invalid index name 5.8%
5. DISPLAY command - no FIND results 3.7%
6. Search term missing from search command 2.3%
7. DISPLAY command-record numbers too large 1.9%
8. PS command - no previous screen 0.9%
9. Add-on search with invalid index name 0.7%
10. Valid command at an inappropriate time 0.7%
11. All others 11.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 29.7%
2. MEDLINE BACKFILES 10.8%
3. DATABASES 8.1%
4. Unrecognized term 5.4%
5. 1752 5.4%
6. ADD-ON SEARCH 5.4%
7. FIND 5.4%
8. INDEXES 5.4%
9. 3315 5.4%
10. MAIL 2.7%
11. All others 13.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 29.1%
2. First word of command is invalid 16.5%
3. FIND command retrieves >1 book 13.9%
4. FIND command with invalid index name 10.1%
5. BROWSE command with invalid index name 3.8%
6. Add-on without index name 2.5%
7. FIND command with zero results 2.5%
8. DISPLAY command-first of >1 screen 2.5%
9. DISPLAY command - middle of >1 screen 2.5%
10. 446 2.5%
11. All others 16.2%
Ten most frequent SHOW requests:
1. HISTORY 90.0%
2. SEARCH 6.7%
3. DATABASES 3.3%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)