MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/21/00 through 10/27/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 243 706 949
Davis 26 792 203 1,021
Irvine 0 452 0 452
Los Angeles 0 387 207 594
Riverside 0 22 50 72
San Diego 91 608 17 716
San Francisco 111 0 1,502 1,613
Santa Barbara 0 21 34 55
Santa Cruz 26 12 114 152
Stanford 322
Other (including DLA) 0 0 2,172 2,172
_______________ _________ _________ _________
Total: 254 2,537 5,005 8,118
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,857 18,528 212,520
MED90 database 990 2,167 18,204
MED85 database 539 1,034 7,408
MED80 database 343 654 3,549
MED75 database 218 417 2,440
MED66 database 171 371 2,321
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 63 229 3,137
2-4 a.m. 25 31 282
4-6 a.m. 27 74 580
6-8 a.m. 119 343 3,869
8-10 a.m. 881 2,281 24,643
10-12 a.m. 1,555 4,532 48,108
12-2 p.m. 1,468 4,208 42,294
2-4 p.m. 1,643 4,736 52,238
4-6 p.m. 1,358 3,744 40,198
6-8 p.m. 475 1,355 16,069
8-10 p.m. 287 951 8,577
10-12 p.m. 217 687 6,447
__________ __________ __________ _________________
Total: 8,118 23,171 246,442
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 13:33 13:42 12:38 13:48
Median 8:25 8:38 11:21 8:48
Total:
Average 13:33 13:42 12:38 13:48
Median 8:25 8:38 11:21 8:48
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.3
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 8,118 100%
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 755.3
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6721.3
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.4%
Percent of long searches completed 77.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 17,630 24.7%
DISPLAY (excluding automatic displays) 25,767 36.1%
BROWSE 373 0.5%
SELECT 187 0.3%
HELP 577 0.8%
EXPLAIN 506 0.7%
SAVE 5,005 7.0%
SET/RESET 3,641 5.1%
SHOW 223 0.3%
ADD-ON (AND, OR, AND NOT) 4,651 6.5%
LOGON or LOGOFF 9,404 13.2%
COMMENT 0 0.0%
OTHER 3,415 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 7,529 30.2% 1,558 20.7% 11 97.3 567.0
TITLE WORD 2,883 11.6% 920 31.9% 11 749.7 7084.3
EXACT TITLE 165 0.7% 56 33.9% 1 10.9 48.4
JOURNAL 1,345 5.4% 408 30.3% 35 1733.0 6532.5
EXACT JOURNAL 358 1.4% 116 32.4% 376 2127.3 3671.1
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 8,668 34.8% 1,542 17.8% 31 1262.8 10219.8
SUBJECT WORD 38 0.2% 21 55.3% 149 2120.2 3925.4
SUBJECT 684 2.7% 278 40.6% 196 2666.3 6941.1
MAJOR SUBJECT 61 0.2% 18 29.5% 148 1451.2 4214.1
EXACT SUBJECT 368 1.5% 71 19.3% 88 4237.6 12746.1
MAJOR XS 63 0.3% 9 14.3% 184 3635.0 8552.2
EXPLODE XS 114 0.5% 16 14.0% 292 10598.1 24277.4
EXPLODE MAJOR 39 0.2% 3 7.7% 1,032 7194.4 13203.8
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 1,177 4.7% 169 14.4% 14 162.4 609.9
LANGUAGE 475 1.9% 19 4.0% 82 533.7 0.0
PUB TYPE 371 1.5% 29 7.8% 43 426.6 1851.2
Other indexes 457 1.8% 32 7.0% 1 31.4 197.2
By number of indexes:
Multiple 7,347 33.1% 1,541 21.0% 11 479.5 4020.5
Single 14,877 66.9% 3,073 20.7% 30 1236.9 8941.8
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 5 1.3% 0 0.0% 3 2.6 0.5
JOURNAL 62 16.7% 18 29.0% 1 10.1 40.2
EXACT JOURNAL 10 2.7% 1 10.0% 1 1.0 0.0
SUBJECT 263 70.7% 44 16.7% 3 44.1 221.0
EXACT SUBJECT 32 8.6% 9 28.1% 1 1.2 0.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 1 0.3% 1 100% 0 0.0 0.0
Single 370 99.7% 70 18.9% 2 33.8 190.0
LIMITS:
Number of times limits (bit strings) used: 1,494
Use by bit string (percentage):
Current year minus 5 18.8%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.3%
Current year minus 1 0.9%
Current year 0.6%
English Language 33.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.8%
XS Animal 0.0%
XS Case Report 0.3%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.1%
XS Female 0.1%
XS Human 6.8%
XS Infant 0.0%
XS Infant, Newborn 0.5%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.2%
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 30.7%
PT Journal Article 0.1%
SUBSET AIM 2.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 2.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,489
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.0%
Percentage of ORs 3.0%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
BRIEF 64.4%
LONG 1.0%
MEDLINE 1.4%
FIELDS 3.8%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.8%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. NS command - no next screen 38.4%
2. First word of command is invalid 27.2%
3. FIND command with invalid index name 7.2%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 1.8%
6. Search term missing from search command 1.8%
7. Add-on search with invalid index name 1.6%
8. Valid command at an inappropriate time 1.6%
9. DISPLAY command-record numbers too large 1.4%
10. DISPLAY command - no FIND results 1.0%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.6%
2. BOOKS DATABASE 13.6%
3. FIND 8.9%
4. Unrecognized term 6.7%
5. COMMANDS 6.1%
6. MEDLINE BACKFILES 5.1%
7. INDEXES 4.7%
8. ADD-ON SEARCH 4.0%
9. DATABASES 3.8%
10. MAIL 3.0%
11. All others 30.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.9%
2. First word of command is invalid 14.1%
3. FIND command with invalid index name 7.2%
4. DISPLAY command-first of >1 screen 6.5%
5. DISPLAY command - middle of >1 screen 5.4%
6. FIND command retrieves >1 book 4.3%
7. PA command modified to Medline format 3.4%
8. DISPLAY command - last of >1 screen 3.0%
9. FIND command with zero results 2.9%
10. NS command - no next screen 2.8%
11. All others 25.5%
Ten most frequent SHOW requests:
1. HISTORY 78.9%
2. SEARCH 9.4%
3. MAIL STATUS 3.9%
4. SETTINGS 2.2%
5. MEDLINE GLOSSARY 1.7%
6. TIME 1.1%
7. UPDATE 1.1%
8. MAIL SETTINGS 0.6%
9. DISPLAY 0.6%
10. DATABASES 0.6%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)