MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/15/00 through 07/21/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 123 548 671
Davis 22 812 142 976
Irvine 0 405 0 405
Los Angeles 0 428 204 632
Riverside 0 10 80 90
San Diego 121 680 80 881
San Francisco 96 0 2,034 2,130
Santa Barbara 0 4 53 57
Santa Cruz 7 7 62 76
Stanford 446
Other (including DLA) 0 0 2,042 2,042
_______________ _________ _________ _________
Total: 246 2,469 5,245 8,406
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,079 20,146 239,898
MED90 database 1,060 2,505 18,871
MED85 database 539 1,198 7,228
MED80 database 353 818 4,007
MED75 database 224 499 2,225
MED66 database 151 392 1,610
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 100 346 2,962
2-4 a.m. 15 83 2,008
4-6 a.m. 38 67 1,134
6-8 a.m. 181 466 4,137
8-10 a.m. 952 2,752 32,935
10-12 a.m. 1,638 5,053 43,140
12-2 p.m. 1,583 4,577 41,074
2-4 p.m. 1,649 5,309 56,218
4-6 p.m. 1,304 3,806 47,343
6-8 p.m. 486 1,472 22,202
8-10 p.m. 302 1,043 11,987
10-12 p.m. 158 584 8,699
__________ __________ __________ _________________
Total: 8,406 25,558 273,839
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 17:30 14:37 15:25 14:30
Median 10:39 8:55 11:32 9:02
Total:
Average 17:30 14:37 15:25 14:30
Median 10:39 8:55 11:32 9:02
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.9 3.1
transmission of response
Display - from receipt of command at DLA until 0.1 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 8,406 100%
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 3.0
Retrievals per search - average 901.8
Retrievals per search - median 10.0
Retrievals per search - standard deviation 8799.6
Percent of searches completed with 0 results 20.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 77.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,737 24.8%
DISPLAY (excluding automatic displays) 26,476 35.1%
BROWSE 409 0.5%
SELECT 211 0.3%
HELP 427 0.6%
EXPLAIN 416 0.6%
SAVE 5,787 7.7%
SET/RESET 3,833 5.1%
SHOW 317 0.4%
ADD-ON (AND, OR, AND NOT) 5,836 7.7%
LOGON or LOGOFF 9,681 12.8%
COMMENT 0 0.0%
OTHER 3,352 4.4%
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 7,737 28.0% 1,527 19.7% 12 120.8 706.0
TITLE WORD 3,173 11.5% 1,045 32.9% 10 424.7 2204.2
EXACT TITLE 154 0.6% 62 40.3% 1 9.8 36.2
JOURNAL 1,185 4.3% 392 33.1% 117 2164.1 7303.8
EXACT JOURNAL 272 1.0% 70 25.7% 406 1794.1 3941.1
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 10,300 37.3% 1,965 19.1% 30 1530.1 13218.2
SUBJECT WORD 15 0.1% 9 60.0% 300 2047.8 4403.6
SUBJECT 655 2.4% 224 34.2% 158 3371.7 12733.6
MAJOR SUBJECT 70 0.3% 11 15.7% 157 1197.8 2695.6
EXACT SUBJECT 483 1.7% 83 17.2% 172 8703.4 28824.3
MAJOR XS 79 0.3% 2 2.5% 276 578.0 673.5
EXPLODE XS 222 0.8% 37 16.7% 311 11803.3 37603.3
EXPLODE MAJOR 44 0.2% 2 4.5% 4,101 23426.2 28983.3
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 1,464 5.3% 183 12.5% 10 146.9 684.6
LANGUAGE 814 2.9% 47 5.8% 88 900.2 0.0
PUB TYPE 408 1.5% 32 7.8% 37 535.3 2555.4
Other indexes 536 1.9% 64 11.9% 1 35.9 329.9
By number of indexes:
Multiple 8,799 35.9% 1,993 22.6% 12 741.0 8756.5
Single 15,725 64.1% 2,988 19.0% 31 1406.2 10651.6
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 12 2.9% 0 0.0% 2 3.8 5.1
JOURNAL 129 31.6% 34 26.4% 2 30.2 228.8
EXACT JOURNAL 2 0.5% 0 0.0% 2 1.5 0.7
SUBJECT 249 61.0% 55 22.1% 3 21.2 189.4
EXACT SUBJECT 16 3.9% 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 408 100% 89 21.8% 2 22.1 193.2
LIMITS:
Number of times limits (bit strings) used: 1,851
Use by bit string (percentage):
Current year minus 5 14.6%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.4%
Current year minus 1 0.1%
Current year 0.3%
English Language 46.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.2%
XS Adolescence 0.1%
XS Adult 0.2%
XS Aged 0.9%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 10.9%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.1%
XS Mice 0.5%
XS Middle Age 0.1%
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 19.3%
PT Journal Article 0.1%
SUBSET AIM 4.2%
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: 10,073
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.4%
Percentage of ORs 3.8%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 63.6%
LONG 1.1%
MEDLINE 1.3%
FIELDS 3.3%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 42.2%
2. First word of command is invalid 24.9%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 4.2%
5. Add-on search with invalid index name 2.1%
6. Search term missing from search command 1.8%
7. PS command - no previous screen 1.6%
8. Valid command at an inappropriate time 1.5%
9. DISPLAY command-record numbers too large 1.1%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 13.5%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 9.6%
2. LOCATE (article dbs w/o monographs) 8.4%
3. FIND 7.2%
4. Unrecognized term 6.7%
5. MEDLINE BACKFILES 6.7%
6. COMMANDS 6.7%
7. INDEXES 5.5%
8. DISPLAY 4.3%
9. ADD-ON SEARCH 3.1%
10. SAVE 2.9%
11. All others 32.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.4%
2. First word of command is invalid 13.8%
3. DISPLAY command-first of >1 screen 7.2%
4. DISPLAY command - middle of >1 screen 5.8%
5. FIND command with invalid index name 5.2%
6. FIND command retrieves >1 book 4.5%
7. NS of SHOW/EXP command-no next screen 3.6%
8. NS command - no next screen 3.4%
9. DISPLAY command-complete in one screen 3.2%
10. PA command modified to Medline format 2.5%
11. All others 38.7%
Ten most frequent SHOW requests:
1. HISTORY 73.9%
2. MAIL STATUS 11.5%
3. SEARCH 10.6%
4. SETTINGS 1.8%
5. MAIL SETTINGS 0.9%
6. MEDLINE GLOSSARY 0.9%
7. DATABASES 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)