MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/01/00 through 01/31/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,000 4,439 5,439
Davis 215 4,544 1,303 6,062
Irvine 0 3,517 0 3,517
Los Angeles 0 3,053 1,277 4,330
Riverside 0 197 415 612
San Diego 1,051 3,678 296 5,025
San Francisco 893 0 10,415 11,308
Santa Barbara 0 121 205 326
Santa Cruz 168 49 477 694
Stanford 2,400
Other (including DLA) 0 0 12,953 12,953
_______________ _________ _________ _________
Total: 2,327 16,159 31,780 52,666
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 36,869 118,174 1,356,529
MED90 database 7,219 15,823 142,754
MED85 database 3,829 7,536 72,688
MED80 database 2,340 4,426 27,767
MED75 database 1,376 2,658 15,904
MED66 database 1,033 2,287 12,823
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 546 1,520 37,644
2-4 a.m. 191 549 7,019
4-6 a.m. 184 509 5,550
6-8 a.m. 913 2,619 38,772
8-10 a.m. 5,518 15,461 160,929
10-12 a.m. 10,165 28,653 283,168
12-2 p.m. 9,424 26,650 268,580
2-4 p.m. 11,539 32,885 315,537
4-6 p.m. 7,686 22,594 249,644
6-8 p.m. 3,285 9,615 118,440
8-10 p.m. 1,928 5,990 70,759
10-12 p.m. 1,287 3,859 72,423
__________ __________ __________ _________________
Total: 52,666 150,904 1,628,465
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 17:28 14:05 17:42 14:04
Median 11:09 8:45 11:10 8:38
Total:
Average 17:28 14:05 17:42 14:04
Median 11:09 8:45 11:10 8:38
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.4 4.8
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 52,666 100%
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 2.9
Retrievals per search - average 702.0
Retrievals per search - median 9.0
Retrievals per search - standard deviation 7550.9
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 56.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 115,282 25.2%
DISPLAY (excluding automatic displays) 161,421 35.2%
BROWSE 2,187 0.5%
SELECT 1,466 0.3%
HELP 3,936 0.9%
EXPLAIN 3,310 0.7%
SAVE 35,328 7.7%
SET/RESET 24,571 5.4%
SHOW 1,530 0.3%
ADD-ON (AND, OR, AND NOT) 28,691 6.3%
LOGON or LOGOFF 58,781 12.8%
COMMENT 5 0.0%
OTHER 21,507 4.7%
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 48,004 29.9% 9,645 20.1% 12 103.6 743.9
TITLE WORD 18,589 11.6% 5,767 31.0% 7 537.0 5393.3
EXACT TITLE 1,226 0.8% 635 51.8% 1 30.1 240.5
JOURNAL 6,393 4.0% 2,099 32.8% 63 2034.8 6273.2
EXACT JOURNAL 2,055 1.3% 580 28.2% 258 1474.8 3780.3
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 60,426 37.6% 12,060 20.0% 28 1128.3 8120.4
SUBJECT WORD 301 0.2% 137 45.5% 173 3827.4 14112.9
SUBJECT 4,397 2.7% 1,776 40.4% 211 3033.5 15823.4
MAJOR SUBJECT 413 0.3% 77 18.6% 128 1467.5 3574.7
EXACT SUBJECT 2,221 1.4% 428 19.3% 108 3249.6 27267.3
MAJOR XS 321 0.2% 61 19.0% 172 1164.0 2400.0
EXPLODE XS 1,088 0.7% 156 14.3% 432 10176.5 50990.4
EXPLODE MAJOR 161 0.1% 10 6.2% 629 7817.4 31892.1
TREE NUMBER 5 0.0% 1 20.0% 1,163 874.0 578.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 6,070 3.8% 1,106 18.2% 12 149.5 596.9
LANGUAGE 4,230 2.6% 203 4.8% 84 693.7 0.0
PUB TYPE 2,161 1.3% 162 7.5% 36 938.4 6484.7
Other indexes 2,259 1.4% 289 12.8% 1 29.1 160.3
By number of indexes:
Multiple 45,716 31.9% 10,198 22.3% 11 581.3 10799.7
Single 97,663 68.1% 20,494 21.0% 28 1092.8 7545.4
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 68 3.1% 11 16.2% 10 86.5 199.9
JOURNAL 408 18.9% 92 22.5% 1 18.7 147.4
EXACT JOURNAL 99 4.6% 38 38.4% 1 2.8 4.8
SUBJECT 1,464 67.7% 258 17.6% 3 35.7 390.6
EXACT SUBJECT 121 5.6% 19 15.7% 1 1.0 0.0
TREE NUMBER 1 0.0% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 2,161 100% 418 19.3% 2 31.0 333.1
LIMITS:
Number of times limits (bit strings) used: 8,768
Use by bit string (percentage):
Current year minus 5 3.1%
Current year minus 4 0.0%
Current year minus 3 1.5%
Current year minus 2 0.3%
Current year minus 1 0.6%
Current year 0.5%
English Language 51.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.2%
XS Adult 0.3%
XS Aged 1.2%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.1%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.1%
XS Mice 0.0%
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 27.4%
PT Journal Article 0.1%
SUBSET AIM 3.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 53,171
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.5%
Percentage of ORs 3.1%
Percentage of AND NOTs 1.4%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
BRIEF 63.7%
LONG 1.1%
MEDLINE 1.0%
FIELDS 2.8%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.2%
Ten most frequent errors:
1. NS command - no next screen 40.3%
2. First word of command is invalid 25.9%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.9%
5. PS command - no previous screen 2.1%
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 1.7%
9. NS of SHOW/EXP command-no next screen 1.4%
10. Command containing escape or arrow key 1.2%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 16.2%
2. LOCATE (article dbs w/o monographs) 10.9%
3. FIND 8.6%
4. MEDLINE BACKFILES 8.1%
5. Unrecognized term 5.2%
6. COMMANDS 5.1%
7. DATABASES 3.9%
8. ADD-ON SEARCH 3.9%
9. DISPLAY 3.6%
10. INDEXES 3.6%
11. All others 32.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.3%
2. First word of command is invalid 13.6%
3. FIND command with invalid index name 6.5%
4. DISPLAY command-first of >1 screen 5.4%
5. FIND command retrieves >1 book 5.2%
6. DISPLAY command - middle of >1 screen 4.7%
7. NS command - no next screen 3.8%
8. DISPLAY command - last of >1 screen 2.8%
9. NS of SHOW/EXP command-no next screen 2.5%
10. DISPLAY command-complete in one screen 2.2%
11. All others 30.9%
Ten most frequent SHOW requests:
1. HISTORY 68.8%
2. SEARCH 15.4%
3. MAIL STATUS 5.9%
4. SETTINGS 2.2%
5. MEDLINE NEWS 2.1%
6. MEDLINE GLOSSARY 1.8%
7. MAIL SETTINGS 1.2%
8. UPDATE 0.6%
9. DATABASES 0.4%
10. MEDLINE STATISTICS 0.3%
11. All others 1.4%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)