MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 03/24/01 through 03/30/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 62 484 546
Davis 27 493 81 601
Irvine 0 465 0 465
Los Angeles 0 50 142 192
Riverside 0 2 32 34
San Diego 102 466 69 637
San Francisco 174 0 1,330 1,504
Santa Barbara 0 0 25 25
Santa Cruz 4 2 55 61
Stanford 153
Other (including DLA) 0 0 2,007 2,007
_______________ _________ _________ _________
Total: 307 1,540 4,225 6,225
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,464 14,125 167,820
MED90 database 749 1,660 11,296
MED85 database 404 905 5,175
MED80 database 281 596 3,627
MED75 database 179 360 2,010
MED66 database 148 332 2,439
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 32 154 2,192
2-4 a.m. 46 81 1,817
4-6 a.m. 32 93 1,754
6-8 a.m. 120 391 3,468
8-10 a.m. 774 1,946 19,097
10-12 a.m. 1,127 3,538 41,077
12-2 p.m. 1,011 2,955 33,785
2-4 p.m. 1,321 3,963 38,900
4-6 p.m. 977 2,740 26,511
6-8 p.m. 391 1,056 12,019
8-10 p.m. 287 715 7,449
10-12 p.m. 107 346 4,298
__________ __________ __________ _________________
Total: 6,225 17,978 192,367
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 18:21 13:47 14:39 13:56
Median 12:45 7:52 11:47 7:54
Total:
Average 18:21 13:47 14:39 13:56
Median 12:45 7:52 11:47 7:54
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.5
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 6,225 100%
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 2.9
Retrievals per search - average 1118.0
Retrievals per search - median 10.0
Retrievals per search - standard deviation 12173.8
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.4%
Percent of long searches completed 57.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 13,571 25.0%
DISPLAY (excluding automatic displays) 19,202 35.3%
BROWSE 489 0.9%
SELECT 173 0.3%
HELP 263 0.5%
EXPLAIN 295 0.5%
SAVE 4,122 7.6%
SET/RESET 2,914 5.4%
SHOW 193 0.4%
ADD-ON (AND, OR, AND NOT) 3,657 6.7%
LOGON or LOGOFF 7,125 13.1%
COMMENT 0 0.0%
OTHER 2,336 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 5,850 30.6% 1,260 21.5% 14 122.4 787.7
TITLE WORD 2,045 10.7% 677 33.1% 9 377.6 3690.1
EXACT TITLE 100 0.5% 42 42.0% 1 75.1 308.5
JOURNAL 981 5.1% 292 29.8% 34 1241.3 5560.9
EXACT JOURNAL 240 1.3% 63 26.2% 682 3663.2 5755.3
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 7,022 36.7% 1,288 18.3% 28 2283.5 20095.5
SUBJECT WORD 20 0.1% 6 30.0% 135 18365.4 46388.8
SUBJECT 449 2.3% 132 29.4% 232 5724.7 20363.3
MAJOR SUBJECT 39 0.2% 5 12.8% 206 2530.8 5472.6
EXACT SUBJECT 349 1.8% 92 26.4% 222 2993.5 13301.0
MAJOR XS 45 0.2% 1 2.2% 69 1567.8 5381.3
EXPLODE XS 95 0.5% 14 14.7% 180 6924.8 19023.3
EXPLODE MAJOR 2 0.0% 1 50.0% 13,657 13657.0 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 830 4.3% 155 18.7% 18 201.3 490.5
LANGUAGE 396 2.1% 21 5.3% 92 1053.3 0.0
PUB TYPE 483 2.5% 51 10.6% 32 1481.9 7531.0
Other indexes 307 1.6% 31 10.1% 1 29.3 134.7
By number of indexes:
Multiple 5,727 33.3% 1,292 22.6% 12 449.5 4590.1
Single 11,447 66.7% 2,321 20.3% 32 1972.9 16711.8
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 27 5.6% 3 11.1% 11 57.9 114.0
JOURNAL 51 10.6% 16 31.4% 3 35.9 100.6
EXACT JOURNAL 4 0.8% 0 0.0% 1 1.0 0.0
SUBJECT 388 80.3% 97 25.0% 2 39.4 361.1
EXACT SUBJECT 13 2.7% 0 0.0% 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 483 100% 116 24.0% 2 38.5 324.3
LIMITS:
Number of times limits (bit strings) used: 1,119
Use by bit string (percentage):
Current year minus 5 18.3%
Current year minus 4 0.0%
Current year minus 3 0.1%
Current year minus 2 0.3%
Current year minus 1 0.4%
Current year 0.3%
English Language 37.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.4%
XS Adult 0.8%
XS Aged 0.5%
XS Animal 0.2%
XS Case Report 1.6%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.1%
XS Female 0.1%
XS Human 6.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.4%
XS Rats 0.4%
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 25.6%
PT Journal Article 0.4%
SUBSET AIM 2.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,491
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.2%
Percentage of ORs 3.1%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
BRIEF 62.8%
LONG 1.0%
MEDLINE 1.1%
FIELDS 4.0%
PERIODICALS 0.0%
BROWSE REVIEW 1.6%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 25.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 39.8%
2. First word of command is invalid 25.4%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 4.2%
5. DISPLAY command - no FIND results 1.9%
6. PS command - no previous screen 1.8%
7. Add-on search with invalid index name 1.8%
8. Search term missing from search command 1.7%
9. Valid command at an inappropriate time 1.6%
10. DISPLAY command-record numbers too large 1.1%
11. All others 14.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 11.5%
2. FIND 8.8%
3. Unrecognized term 7.5%
4. MEDLINE BACKFILES 7.1%
5. LOCATE (article dbs w/o monographs) 6.1%
6. DATABASES 4.7%
7. ADD-ON SEARCH 4.1%
8. DATES INDEX 3.7%
9. MAIL 3.4%
10. DISPLAY 3.4%
11. All others 32.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 17.9%
2. First word of command is invalid 13.4%
3. FIND command retrieves >1 book 6.5%
4. FIND command with invalid index name 6.3%
5. DISPLAY command-first of >1 screen 5.2%
6. DISPLAY command - last of >1 screen 5.2%
7. FIND command with zero results 3.8%
8. DISPLAY command - middle of >1 screen 3.8%
9. PA command modified to Medline format 3.0%
10. DISPLAY command-complete in one screen 2.9%
11. All others 39.7%
Ten most frequent SHOW requests:
1. HISTORY 70.6%
2. MAIL STATUS 13.1%
3. SEARCH 8.1%
4. SETTINGS 1.9%
5. MEDLINE GLOSSARY 1.9%
6. MEDLINE NEWS 1.3%
7. X016 0.6%
8. MAIL SETTINGS 0.6%
9. 0876 0.6%
10. UPDATE 0.6%
11. All others 0.6%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)