MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/26/00 through 09/01/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 163 487 650
Davis 42 913 94 1,049
Irvine 0 446 0 446
Los Angeles 0 447 169 616
Riverside 0 31 44 75
San Diego 102 616 68 786
San Francisco 67 0 1,682 1,749
Santa Barbara 0 4 38 42
Santa Cruz 11 5 51 67
Stanford 400
Other (including DLA) 0 0 1,824 1,824
_______________ _________ _________ _________
Total: 222 2,625 4,457 7,704
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,450 17,153 208,452
MED90 database 1,018 2,085 13,999
MED85 database 528 953 10,921
MED80 database 343 687 8,304
MED75 database 231 485 4,621
MED66 database 134 283 2,678
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 120 298 3,085
2-4 a.m. 28 54 980
4-6 a.m. 82 165 1,157
6-8 a.m. 198 508 3,885
8-10 a.m. 908 2,382 31,121
10-12 a.m. 1,490 4,290 54,843
12-2 p.m. 1,281 3,739 43,350
2-4 p.m. 1,595 4,584 48,000
4-6 p.m. 1,043 2,930 31,038
6-8 p.m. 496 1,389 14,928
8-10 p.m. 243 691 9,670
10-12 p.m. 220 616 6,918
__________ __________ __________ _________________
Total: 7,704 21,646 248,975
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 19:25 14:22 17:28 14:29
Median 11:19 8:13 11:32 8:23
Total:
Average 19:25 14:22 17:28 14:29
Median 11:19 8:13 11:32 8:23
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 7,704 100%
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 845.2
Retrievals per search - median 10.0
Retrievals per search - standard deviation 7713.5
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.2%
Percent of long searches completed 67.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,872 25.2%
DISPLAY (excluding automatic displays) 24,413 36.4%
BROWSE 281 0.4%
SELECT 105 0.2%
HELP 436 0.7%
EXPLAIN 401 0.6%
SAVE 5,054 7.5%
SET/RESET 3,520 5.3%
SHOW 229 0.3%
ADD-ON (AND, OR, AND NOT) 3,984 5.9%
LOGON or LOGOFF 8,795 13.1%
COMMENT 0 0.0%
OTHER 2,903 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 6,729 28.8% 1,380 20.5% 15 104.2 491.1
TITLE WORD 2,382 10.2% 745 31.3% 7 559.3 6373.9
EXACT TITLE 142 0.6% 61 43.0% 1 93.6 445.0
JOURNAL 1,164 5.0% 327 28.1% 137 2195.8 5960.2
EXACT JOURNAL 254 1.1% 71 27.9% 294 1896.2 4058.5
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 9,187 39.3% 1,672 18.2% 27 1296.9 10207.3
SUBJECT WORD 27 0.1% 13 48.1% 196 379.5 446.3
SUBJECT 536 2.3% 247 46.1% 315 4564.4 14665.3
MAJOR SUBJECT 47 0.2% 3 6.4% 152 1077.7 2468.6
EXACT SUBJECT 360 1.5% 56 15.6% 70 12065.2 38055.6
MAJOR XS 51 0.2% 8 15.7% 347 2092.1 3610.8
EXPLODE XS 161 0.7% 28 17.4% 256 20799.1 47187.2
EXPLODE MAJOR 16 0.1% 0 0.0% 279 1979.1 3637.7
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 1,084 4.6% 124 11.4% 14 219.4 779.2
LANGUAGE 546 2.3% 26 4.8% 88 608.0 0.0
PUB TYPE 279 1.2% 17 6.1% 40 384.2 2140.4
Other indexes 374 1.6% 55 14.7% 1 32.7 158.4
By number of indexes:
Multiple 6,484 31.1% 1,340 20.7% 14 1110.0 11509.6
Single 14,330 68.8% 2,891 20.2% 29 1082.4 7225.2
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 6 2.2% 1 16.7% 39 61.8 74.1
JOURNAL 72 25.8% 17 23.6% 2 6.6 8.6
EXACT JOURNAL 8 2.9% 0 0.0% 2 1.8 1.0
SUBJECT 189 67.7% 29 15.3% 3 14.4 63.2
EXACT SUBJECT 4 1.4% 2 50.0% 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 279 100% 49 17.6% 3 13.0 54.4
LIMITS:
Number of times limits (bit strings) used: 1,333
Use by bit string (percentage):
Current year minus 5 20.2%
Current year minus 4 0.0%
Current year minus 3 1.1%
Current year minus 2 0.1%
Current year minus 1 0.1%
Current year 0.4%
English Language 41.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.2%
XS Adult 0.1%
XS Aged 0.4%
XS Animal 0.1%
XS Case Report 0.1%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 9.5%
XS Infant 0.0%
XS Infant, Newborn 0.3%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
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 21.2%
PT Journal Article 0.1%
SUBSET AIM 4.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,465
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.2%
Percentage of ORs 4.6%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
BRIEF 63.3%
LONG 0.6%
MEDLINE 0.9%
FIELDS 3.3%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.8%
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 39.4%
2. First word of command is invalid 26.0%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 1.9%
6. Add-on search with invalid index name 1.8%
7. Search term missing from search command 1.7%
8. Valid command at an inappropriate time 1.6%
9. NS of SHOW/EXP command-no next screen 1.3%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 16.2%
2. MEDLINE BACKFILES 12.7%
3. BOOKS DATABASE 11.0%
4. FIND 9.5%
5. Unrecognized term 6.5%
6. COMMANDS 4.2%
7. DISPLAY 4.0%
8. DATABASES 3.5%
9. INDEXES 3.5%
10. MAIL 2.2%
11. All others 28.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.3%
2. First word of command is invalid 14.0%
3. DISPLAY command-first of >1 screen 6.7%
4. FIND command with invalid index name 5.6%
5. FIND command retrieves >1 book 4.8%
6. NS command - no next screen 4.7%
7. DISPLAY command - middle of >1 screen 3.7%
8. NS of SHOW/EXP command-no next screen 3.7%
9. DISPLAY command-complete in one screen 2.5%
10. DISPLAY command - last of >1 screen 2.2%
11. All others 26.7%
Ten most frequent SHOW requests:
1. HISTORY 64.0%
2. SEARCH 17.5%
3. MAIL STATUS 13.0%
4. MEDLINE GLOSSARY 2.0%
5. MAIL SETTINGS 1.0%
6. DISPLAY 0.5%
7. SETTINGS 0.5%
8. FIND DISPLAY 0.5%
9. MEDLINE STATISTICS 0.5%
10. MEDLINE WEEKLY STATISTICS 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)