MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/20/01 through 01/26/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 130 663 793
Davis 14 834 97 945
Irvine 0 638 0 638
Los Angeles 0 108 209 317
Riverside 0 14 79 93
San Diego 140 450 58 648
San Francisco 131 0 1,467 1,598
Santa Barbara 0 24 70 94
Santa Cruz 12 6 57 75
Stanford 275
Other (including DLA) 0 0 2,141 2,141
_______________ _________ _________ _________
Total: 297 2,204 4,841 7,617
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,560 17,134 212,211
MED90 database 921 2,118 16,029
MED85 database 500 1,003 7,339
MED80 database 297 631 4,205
MED75 database 178 348 1,335
MED66 database 161 377 2,293
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 76 238 2,914
2-4 a.m. 41 130 19,798
4-6 a.m. 94 182 937
6-8 a.m. 190 574 6,868
8-10 a.m. 923 2,575 24,253
10-12 a.m. 1,437 4,108 34,795
12-2 p.m. 1,332 3,781 45,189
2-4 p.m. 1,529 4,395 40,625
4-6 p.m. 1,143 3,109 31,933
6-8 p.m. 420 1,191 16,995
8-10 p.m. 286 864 11,260
10-12 p.m. 146 464 7,845
__________ __________ __________ _________________
Total: 7,617 21,611 243,412
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 12:57 14:11 19:34 14:02
Median 11:00 8:57 12:56 9:23
Total:
Average 12:57 14:11 19:34 14:02
Median 11:00 8:57 12:56 9:23
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.0
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 7,617 100%
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 758.0
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8155.7
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 71.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,240 25.0%
DISPLAY (excluding automatic displays) 23,445 36.1%
BROWSE 282 0.4%
SELECT 147 0.2%
HELP 439 0.7%
EXPLAIN 322 0.5%
SAVE 4,482 6.9%
SET/RESET 3,687 5.7%
SHOW 177 0.3%
ADD-ON (AND, OR, AND NOT) 4,411 6.8%
LOGON or LOGOFF 8,503 13.1%
COMMENT 0 0.0%
OTHER 2,887 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 6,781 29.3% 1,318 19.4% 11 117.6 567.5
TITLE WORD 2,599 11.2% 834 32.1% 8 286.6 1249.4
EXACT TITLE 198 0.9% 83 41.9% 1 7.3 26.1
JOURNAL 1,094 4.7% 331 30.3% 68 2008.4 6914.4
EXACT JOURNAL 291 1.3% 75 25.8% 623 2556.0 4705.0
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 8,373 36.2% 1,663 19.9% 27 1247.5 10295.3
SUBJECT WORD 18 0.1% 7 38.9% 128 2642.1 3670.6
SUBJECT 640 2.8% 249 38.9% 112 3282.0 9675.8
MAJOR SUBJECT 38 0.2% 4 10.5% 253 1241.1 1958.1
EXACT SUBJECT 428 1.9% 95 22.2% 80 1076.8 4653.4
MAJOR XS 48 0.2% 9 18.8% 659 1498.3 1787.1
EXPLODE XS 140 0.6% 22 15.7% 309 14293.4 66466.9
EXPLODE MAJOR 64 0.3% 5 7.8% 731 7303.2 34063.8
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 867 3.8% 161 18.6% 13 172.3 955.1
LANGUAGE 639 2.8% 37 5.8% 70 639.7 0.0
PUB TYPE 278 1.2% 26 9.4% 31 1121.4 4223.8
Other indexes 483 2.1% 48 9.9% 1 15.0 153.6
By number of indexes:
Multiple 6,744 32.7% 1,466 21.7% 11 458.0 4083.0
Single 13,872 67.3% 2,885 20.8% 28 1258.8 11041.7
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 11 4.0% 2 18.2% 74 62.2 57.0
JOURNAL 52 18.7% 16 30.8% 3 10.0 24.6
EXACT JOURNAL 16 5.8% 8 50.0% 3 2.1 1.0
SUBJECT 169 60.8% 35 20.7% 2 117.9 915.0
EXACT SUBJECT 30 10.8% 4 13.3% 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 278 100% 65 23.4% 2 78.7 726.8
LIMITS:
Number of times limits (bit strings) used: 1,550
Use by bit string (percentage):
Current year minus 5 17.7%
Current year minus 4 0.0%
Current year minus 3 0.6%
Current year minus 2 0.1%
Current year minus 1 0.3%
Current year 0.1%
English Language 43.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.1%
XS Abstract 0.4%
XS Adolescence 0.3%
XS Adult 0.3%
XS Aged 0.4%
XS Animal 0.5%
XS Case Report 0.0%
XS Child 0.7%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 9.8%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.8%
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 21.1%
PT Journal Article 0.3%
SUBSET AIM 2.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 8,058
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 3.4%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 62.8%
LONG 1.4%
MEDLINE 0.8%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.4%
Ten most frequent errors:
1. NS command - no next screen 40.5%
2. First word of command is invalid 26.7%
3. FIND command with invalid index name 6.1%
4. DISPLAY command contains invalid word 3.9%
5. Valid command at an inappropriate time 1.9%
6. PS command - no previous screen 1.8%
7. Add-on search with invalid index name 1.8%
8. DISPLAY command-record numbers too large 1.5%
9. Search term missing from search command 1.5%
10. DISPLAY command - no FIND results 1.3%
11. All others 13.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 17.4%
2. MEDLINE BACKFILES 10.6%
3. FIND 9.6%
4. LOCATE (article dbs w/o monographs) 7.8%
5. COMMANDS 7.8%
6. Unrecognized term 5.0%
7. INDEXES 5.0%
8. ADD-ON SEARCH 3.1%
9. DISPLAY 3.1%
10. DATABASES 2.8%
11. All others 28.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.9%
2. First word of command is invalid 14.6%
3. FIND command with invalid index name 7.1%
4. DISPLAY command-first of >1 screen 5.4%
5. DISPLAY command - middle of >1 screen 5.0%
6. FIND command retrieves >1 book 4.9%
7. NS command - no next screen 4.3%
8. DISPLAY command - last of >1 screen 3.5%
9. FIND command with zero results 2.1%
10. DISPLAY command-complete in one screen 2.0%
11. All others 28.0%
Ten most frequent SHOW requests:
1. HISTORY 73.5%
2. SEARCH 13.2%
3. MAIL STATUS 4.0%
4. SETTINGS 3.3%
5. MAIL SETTINGS 1.3%
6. MEDLINE GLOSSARY 1.3%
7. EXPERIMENTS 0.7%
8. TIMEOUT SETTING 0.7%
9. MEDLINE LOADING STATISTICS 0.7%
10. MEDLINE STATISTICS 0.7%
11. All others 0.7%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)