MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/16/01 through 06/22/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 59 621 680
Davis 18 513 76 607
Irvine 0 238 0 238
Los Angeles 0 6 83 89
Riverside 0 2 97 99
San Diego 110 454 29 593
San Francisco 71 0 1,173 1,244
Santa Barbara 0 1 8 9
Santa Cruz 1 4 48 53
Stanford 232
Other (including DLA) 0 0 1,841 1,841
_______________ _________ _________ _________
Total: 200 1,277 3,976 5,685
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,067 12,378 136,037
MED90 database 703 1,430 8,732
MED85 database 365 715 4,386
MED80 database 252 472 3,059
MED75 database 164 341 2,590
MED66 database 134 297 2,584
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 56 159 2,153
2-4 a.m. 32 80 946
4-6 a.m. 64 126 2,488
6-8 a.m. 145 421 4,073
8-10 a.m. 655 1,788 13,843
10-12 a.m. 1,155 3,425 35,018
12-2 p.m. 922 2,548 26,627
2-4 p.m. 1,232 3,186 29,508
4-6 p.m. 777 2,229 23,075
6-8 p.m. 356 884 9,485
8-10 p.m. 161 419 6,344
10-12 p.m. 130 368 3,828
__________ __________ __________ _________________
Total: 5,685 15,633 157,388
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 12:54 13:15 16:06 13:53
Median 7:32 8:23 13:16 9:02
Total:
Average 12:54 13:15 16:06 13:53
Median 7:32 8:23 13:16 9:02
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.7
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 5,685 100%
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 888.0
Retrievals per search - median 10.0
Retrievals per search - standard deviation 7999.9
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed 62.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,853 25.8%
DISPLAY (excluding automatic displays) 15,841 34.5%
BROWSE 301 0.7%
SELECT 93 0.2%
HELP 223 0.5%
EXPLAIN 214 0.5%
SAVE 2,917 6.3%
SET/RESET 2,656 5.8%
SHOW 126 0.3%
ADD-ON (AND, OR, AND NOT) 3,235 7.0%
LOGON or LOGOFF 6,418 14.0%
COMMENT 0 0.0%
OTHER 2,091 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 5,287 31.0% 1,117 21.1% 12 118.0 801.2
TITLE WORD 1,997 11.7% 645 32.3% 10 722.0 4119.1
EXACT TITLE 127 0.7% 75 59.1% 1 14.3 46.9
JOURNAL 908 5.3% 262 28.9% 199 2313.9 10154.5
EXACT JOURNAL 207 1.2% 58 28.0% 741 2420.4 3972.8
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 5,728 33.6% 1,017 17.8% 29 1487.5 12067.5
SUBJECT WORD 14 0.1% 5 35.7% 155 6774.7 16776.3
SUBJECT 389 2.3% 127 32.6% 167 3451.4 12529.3
MAJOR SUBJECT 58 0.3% 10 17.2% 32 2017.2 9181.4
EXACT SUBJECT 354 2.1% 85 24.0% 256 5771.7 17834.8
MAJOR XS 94 0.6% 18 19.1% 130 1354.0 3501.1
EXPLODE XS 81 0.5% 18 22.2% 1,656 16125.0 37578.5
EXPLODE MAJOR 28 0.2% 4 14.3% 698 10880.6 30165.7
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 910 5.3% 154 16.9% 12 109.8 360.7
LANGUAGE 393 2.3% 22 5.6% 72 357.1 0.0
PUB TYPE 300 1.8% 22 7.3% 28 318.7 2012.9
Other indexes 222 1.3% 20 9.0% 1 173.6 543.8
By number of indexes:
Multiple 5,263 35.0% 1,091 20.7% 11 577.1 8687.7
Single 9,787 65.0% 1,993 20.4% 34 1463.2 9322.0
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 16 5.3% 0 0.0% 1 13.7 47.9
JOURNAL 73 24.3% 12 16.4% 2 14.0 36.5
EXACT JOURNAL 3 1.0% 0 0.0% 1 6.3 9.2
SUBJECT 195 65.0% 33 16.9% 2 22.9 187.4
EXACT SUBJECT 13 4.3% 3 23.1% 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 300 100% 48 16.0% 2 19.1 151.7
LIMITS:
Number of times limits (bit strings) used: 1,190
Use by bit string (percentage):
Current year minus 5 21.8%
Current year minus 4 0.0%
Current year minus 3 1.4%
Current year minus 2 0.3%
Current year minus 1 0.4%
Current year 0.5%
English Language 33.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 1.0%
XS Human 11.8%
XS Infant 0.0%
XS Infant, Newborn 0.3%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.3%
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 17.5%
PT Journal Article 0.2%
SUBSET AIM 2.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 6.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,073
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.4%
Percentage of ORs 4.1%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 63.3%
LONG 1.3%
MEDLINE 0.6%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.3%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 26.6%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.6%
Ten most frequent errors:
1. NS command - no next screen 41.0%
2. First word of command is invalid 24.7%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.7%
5. PS command - no previous screen 2.2%
6. Add-on search with invalid index name 2.2%
7. Command containing escape or arrow key 1.7%
8. DISPLAY command - no FIND results 1.7%
9. Search term missing from search command 1.7%
10. Valid command at an inappropriate time 1.6%
11. All others 13.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.0%
2. MEDLINE BACKFILES 10.7%
3. Unrecognized term 10.3%
4. FIND 7.9%
5. LOCATE (article dbs w/o monographs) 4.2%
6. INDEXES 4.2%
7. DISPLAY 3.7%
8. DATABASES 3.3%
9. COMMANDS 3.3%
10. 1752 2.3%
11. All others 30.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 25.9%
2. First word of command is invalid 14.6%
3. FIND command retrieves >1 book 5.9%
4. FIND command with invalid index name 5.5%
5. DISPLAY command - middle of >1 screen 5.0%
6. DISPLAY command-first of >1 screen 3.7%
7. FIND command with zero results 2.5%
8. PA command modified to Medline format 2.3%
9. NS command - no next screen 2.1%
10. DISPLAY command - last of >1 screen 2.1%
11. All others 36.0%
Ten most frequent SHOW requests:
1. HISTORY 73.0%
2. SEARCH 14.9%
3. SETTINGS 6.8%
4. MEDLINE GLOSSARY 4.1%
5. MEDLINE NEWS 1.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)