MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/01/01 through 12/07/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 69 423 492
Davis 23 434 81 538
Irvine 0 168 0 168
Los Angeles 0 9 74 83
Riverside 0 3 50 53
San Diego 66 340 44 450
San Francisco 63 0 680 743
Santa Barbara 0 4 15 19
Santa Cruz 0 1 36 37
Stanford 53
Other (including DLA) 0 0 1,480 1,480
_______________ _________ _________ _________
Total: 152 1,028 2,883 4,116
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 2,914 8,716 95,952
MED90 database 505 1,180 11,329
MED85 database 289 661 6,062
MED80 database 195 450 15,588
MED75 database 118 310 4,181
MED66 database 95 253 3,536
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 27 126 1,142
2-4 a.m. 35 91 603
4-6 a.m. 34 88 443
6-8 a.m. 83 212 2,564
8-10 a.m. 570 1,465 13,270
10-12 a.m. 840 2,363 23,944
12-2 p.m. 768 2,154 22,775
2-4 p.m. 712 1,958 25,218
4-6 p.m. 575 1,680 14,307
6-8 p.m. 250 697 26,768
8-10 p.m. 128 461 3,755
10-12 p.m. 94 275 1,859
__________ __________ __________ _________________
Total: 4,116 11,570 136,648
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 19:39 13:41 16:33 14:19
Median 13:06 8:27 12:35 9:05
Total:
Average 19:39 13:41 16:33 14:19
Median 13:06 8:27 12:35 9:05
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 4,116 100%
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 2.8
Retrievals per search - average 795.2
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6276.2
Percent of searches completed with 0 results 21.3%
Percent of searches entered that are long 0.4%
Percent of long searches completed 63.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 8,305 24.8%
DISPLAY (excluding automatic displays) 11,514 34.4%
BROWSE 271 0.8%
SELECT 64 0.2%
HELP 154 0.5%
EXPLAIN 152 0.5%
SAVE 2,279 6.8%
SET/RESET 2,111 6.3%
SHOW 131 0.4%
ADD-ON (AND, OR, AND NOT) 2,585 7.7%
LOGON or LOGOFF 4,279 12.8%
COMMENT 0 0.0%
OTHER 1,591 4.8%
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 3,724 30.3% 777 20.9% 12 143.5 1123.8
TITLE WORD 1,807 14.7% 570 31.5% 8 662.3 4622.8
EXACT TITLE 138 1.1% 52 37.7% 1 7.4 25.7
JOURNAL 740 6.0% 201 27.2% 547 2823.3 6620.0
EXACT JOURNAL 231 1.9% 55 23.8% 339 2796.9 5756.4
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 3,773 30.7% 784 20.8% 27 1432.6 9950.7
SUBJECT WORD 12 0.1% 3 25.0% 5 12601.7 21461.8
SUBJECT 302 2.5% 114 37.7% 121 4133.0 19096.5
MAJOR SUBJECT 33 0.3% 3 9.1% 48 454.1 629.8
EXACT SUBJECT 180 1.5% 44 24.4% 48 2924.2 11071.7
MAJOR XS 40 0.3% 3 7.5% 772 1426.9 1671.6
EXPLODE XS 38 0.3% 5 13.2% 1,936 7744.7 12439.0
EXPLODE MAJOR 6 0.0% 0 0.0% 1,060 56040.7 85942.8
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 871 7.1% 124 14.2% 20 173.9 392.6
LANGUAGE 172 1.4% 10 5.8% 90 620.0 0.0
PUB TYPE 266 2.2% 13 4.9% 69 625.4 1340.7
Other indexes 98 0.8% 9 9.2% 1 26.2 96.2
By number of indexes:
Multiple 3,960 36.5% 912 23.0% 9 542.6 5543.4
Single 6,902 63.5% 1,451 21.0% 36 1368.9 8089.7
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 0.8% 0 0.0% 8 8.0 8.5
JOURNAL 28 10.5% 7 25.0% 7 12.4 18.6
EXACT JOURNAL 6 2.3% 1 16.7% 1 1.0 0.0
SUBJECT 216 81.2% 54 25.0% 3 23.6 145.6
EXACT SUBJECT 14 5.3% 2 14.3% 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 266 100% 64 24.1% 2 20.4 130.6
LIMITS:
Number of times limits (bit strings) used: 704
Use by bit string (percentage):
Current year minus 5 36.2%
Current year minus 4 0.0%
Current year minus 3 1.3%
Current year minus 2 0.0%
Current year minus 1 0.3%
Current year 0.7%
English Language 26.8%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.6%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 11.6%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.1%
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 15.8%
PT Journal Article 2.6%
SUBSET AIM 1.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.6%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,672
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 90.0%
Percentage of ORs 8.2%
Percentage of AND NOTs 1.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.1%
BRIEF 60.6%
LONG 1.0%
MEDLINE 1.1%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.5%
BROWSE LONG 0.8%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.1%
Ten most frequent errors:
1. NS command - no next screen 36.3%
2. First word of command is invalid 25.1%
3. FIND command with invalid index name 7.4%
4. DISPLAY command contains invalid word 3.7%
5. Add-on search with invalid index name 2.7%
6. Search term missing from search command 2.1%
7. 1185 1.7%
8. PS command - no previous screen 1.6%
9. NS of SHOW/EXP command-no next screen 1.6%
10. DISPLAY command - no FIND results 1.4%
11. All others 16.5%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.4%
2. BOOKS DATABASE 15.8%
3. MEDLINE BACKFILES 9.9%
4. COMMANDS 6.6%
5. Unrecognized term 5.3%
6. DATABASES 4.6%
7. ADD-ON SEARCH 4.6%
8. FIND 4.6%
9. SETTINGS 2.6%
10. INDEXES 2.0%
11. All others 25.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.2%
2. First word of command is invalid 15.4%
3. DISPLAY command-first of >1 screen 9.5%
4. FIND command with invalid index name 8.5%
5. FIND command retrieves >1 book 6.5%
6. DISPLAY command - middle of >1 screen 2.9%
7. DISPLAY command - last of >1 screen 2.9%
8. NS command - no next screen 2.6%
9. DISPLAY command-complete in one screen 2.6%
10. FIND command with zero results 2.3%
11. All others 25.7%
Ten most frequent SHOW requests:
1. HISTORY 65.7%
2. SEARCH 15.7%
3. MEDLINE NEWS 7.4%
4. SETTINGS 2.8%
5. MEDLINE GLOSSARY 2.8%
6. MAIL STATUS 1.9%
7. UPDATE 1.9%
8. DATABASES 1.9%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)