MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/15/01 through 12/21/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 34 282 316
Davis 29 313 38 380
Irvine 0 237 0 237
Los Angeles 0 13 39 52
Riverside 0 7 44 51
San Diego 11 267 8 286
San Francisco 44 0 666 710
Santa Barbara 0 1 4 5
Santa Cruz 0 1 25 26
Stanford 35
Other (including DLA) 0 0 1,418 1,418
_______________ _________ _________ _________
Total: 84 873 2,524 3,516
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 2,482 7,062 69,640
MED90 database 413 852 4,467
MED85 database 232 490 2,624
MED80 database 179 359 1,773
MED75 database 113 250 2,144
MED66 database 97 236 2,574
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 35 122 1,031
2-4 a.m. 25 77 590
4-6 a.m. 10 25 250
6-8 a.m. 72 155 1,116
8-10 a.m. 457 1,257 10,357
10-12 a.m. 764 1,995 16,439
12-2 p.m. 661 1,673 14,742
2-4 p.m. 764 2,184 19,180
4-6 p.m. 456 1,084 11,170
6-8 p.m. 126 337 3,611
8-10 p.m. 87 213 3,355
10-12 p.m. 59 127 1,381
__________ __________ __________ _________________
Total: 3,516 9,249 83,222
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 17:48 14:32 24:29 14:32
Median 14:16 8:37 11:17 9:13
Total:
Average 17:48 14:32 24:29 14:32
Median 14:16 8:37 11:17 9:13
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.8
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 3,516 100%
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 820.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 9700.9
Percent of searches completed with 0 results 20.4%
Percent of searches entered that are long 0.4%
Percent of long searches completed 71.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 6,811 26.5%
DISPLAY (excluding automatic displays) 8,298 32.3%
BROWSE 120 0.5%
SELECT 41 0.2%
HELP 91 0.4%
EXPLAIN 117 0.5%
SAVE 1,530 6.0%
SET/RESET 1,760 6.9%
SHOW 51 0.2%
ADD-ON (AND, OR, AND NOT) 1,960 7.6%
LOGON or LOGOFF 3,695 14.4%
COMMENT 0 0.0%
OTHER 1,195 4.7%
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 3,019 30.9% 617 20.4% 12 148.8 855.1
TITLE WORD 1,704 17.4% 583 34.2% 7 339.1 1698.9
EXACT TITLE 135 1.4% 46 34.1% 1 5.4 20.4
JOURNAL 567 5.8% 136 24.0% 256 2332.2 6405.2
EXACT JOURNAL 150 1.5% 43 28.7% 567 2542.1 5641.8
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 2,827 29.0% 441 15.6% 34 1660.4 16621.5
SUBJECT WORD 7 0.1% 6 85.7% 217 217.0 0.0
SUBJECT 170 1.7% 67 39.4% 33 2918.4 7137.1
MAJOR SUBJECT 10 0.1% 1 10.0% 92 2698.8 4213.8
EXACT SUBJECT 132 1.4% 43 32.6% 119 3149.1 6471.7
MAJOR XS 34 0.3% 9 26.5% 4,826 5442.5 6011.7
EXPLODE XS 18 0.2% 2 11.1% 3,997 6288.1 10153.2
EXPLODE MAJOR 9 0.1% 1 11.1% 512 44878.1 108519
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 652 6.7% 105 16.1% 13 139.9 395.4
LANGUAGE 176 1.8% 5 2.8% 73 2527.2 0.0
PUB TYPE 119 1.2% 4 3.4% 39 674.9 2520.4
Other indexes 57 0.6% 16 28.1% 1 376.5 1824.0
By number of indexes:
Multiple 2,943 33.6% 645 21.9% 8 391.5 5680.6
Single 5,806 66.4% 1,182 20.4% 38 1437.1 13074.7
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 1.7% 0 0.0% 2 1.5 0.7
JOURNAL 24 20.2% 3 12.5% 1 5.1 15.4
EXACT JOURNAL 2 1.7% 1 50.0% 1 1.0 0.0
SUBJECT 73 61.3% 20 27.4% 2 14.0 28.7
EXACT SUBJECT 18 15.1% 1 5.6% 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 119 100% 25 21.0% 1 9.2 23.3
LIMITS:
Number of times limits (bit strings) used: 575
Use by bit string (percentage):
Current year minus 5 43.8%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.3%
Current year minus 1 0.3%
Current year 0.7%
English Language 31.3%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 5.0%
XS Infant 0.0%
XS Infant, Newborn 0.2%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.4%
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 13.9%
PT Journal Article 0.0%
SUBSET AIM 0.3%
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: 3,492
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 90.3%
Percentage of ORs 7.6%
Percentage of AND NOTs 2.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
BRIEF 61.8%
LONG 1.6%
MEDLINE 1.2%
FIELDS 4.6%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 41.7%
2. First word of command is invalid 27.0%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 3.6%
5. Add-on search with invalid index name 1.9%
6. DISPLAY command - no FIND results 1.8%
7. PS command - no previous screen 1.7%
8. Valid command at an inappropriate time 1.6%
9. NS of SHOW/EXP command-no next screen 1.0%
10. Command containing escape or arrow key 1.0%
11. All others 12.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 19.7%
2. LOCATE (article dbs w/o monographs) 14.5%
3. MEDLINE BACKFILES 10.3%
4. INDEXES 8.5%
5. Unrecognized term 7.7%
6. FIND 4.3%
7. COMMANDS 4.3%
8. DATABASES 3.4%
9. DATES INDEX 3.4%
10. MAIL 2.6%
11. All others 28.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.2%
2. First word of command is invalid 10.6%
3. FIND command with invalid index name 9.6%
4. DISPLAY command-first of >1 screen 8.7%
5. DISPLAY command - middle of >1 screen 4.8%
6. FIND command with zero results 4.3%
7. NS command - no next screen 3.4%
8. NS of SHOW/EXP command-no next screen 3.4%
9. Add-on without index name 2.9%
10. FIND command retrieves >1 book 2.9%
11. All others 21.4%
Ten most frequent SHOW requests:
1. HISTORY 83.3%
2. SETTINGS 4.2%
3. MEDLINE GLOSSARY 4.2%
4. CAMPUS NEWS 2.1%
5. MAIL SETTINGS 2.1%
6. SEARCH 2.1%
7. MAIL STATUS 2.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)