MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/24/01 through 03/02/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 187 635 822
Davis 21 538 107 666
Irvine 0 606 0 606
Los Angeles 0 209 155 364
Riverside 0 6 77 83
San Diego 120 607 39 766
San Francisco 104 0 1,557 1,661
Santa Barbara 0 9 61 70
Santa Cruz 13 2 63 78
Stanford 317
Other (including DLA) 0 0 2,024 2,024
_______________ _________ _________ _________
Total: 258 2,164 4,718 7,457
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,327 16,962 183,568
MED90 database 937 2,061 15,888
MED85 database 521 1,101 10,115
MED80 database 323 681 3,755
MED75 database 189 377 1,849
MED66 database 160 439 1,806
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 115 280 4,744
2-4 a.m. 22 91 820
4-6 a.m. 29 53 353
6-8 a.m. 162 435 5,438
8-10 a.m. 851 2,412 24,762
10-12 a.m. 1,504 4,530 37,462
12-2 p.m. 1,268 3,476 35,024
2-4 p.m. 1,413 4,225 44,305
4-6 p.m. 1,109 3,205 36,295
6-8 p.m. 452 1,281 10,701
8-10 p.m. 303 927 9,150
10-12 p.m. 229 706 7,927
__________ __________ __________ _________________
Total: 7,457 21,621 216,981
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 11:56 13:01 13:46 13:29
Median 6:35 8:29 11:01 8:42
Total:
Average 11:56 13:01 13:46 13:29
Median 6:35 8:29 11:01 8:42
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.1
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 7,457 100%
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 973.6
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8909.8
Percent of searches completed with 0 results 21.0%
Percent of searches entered that are long 0.3%
Percent of long searches completed 52.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,617 26.0%
DISPLAY (excluding automatic displays) 22,373 35.1%
BROWSE 325 0.5%
SELECT 149 0.2%
HELP 485 0.8%
EXPLAIN 387 0.6%
SAVE 4,437 7.0%
SET/RESET 3,474 5.4%
SHOW 203 0.3%
ADD-ON (AND, OR, AND NOT) 4,093 6.4%
LOGON or LOGOFF 8,423 13.2%
COMMENT 0 0.0%
OTHER 2,826 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 6,732 28.8% 1,368 20.3% 10 91.1 710.8
TITLE WORD 2,727 11.7% 854 31.3% 6 631.7 4845.9
EXACT TITLE 372 1.6% 121 32.5% 1 26.6 189.4
JOURNAL 1,355 5.8% 400 29.5% 331 2290.9 6528.7
EXACT JOURNAL 292 1.3% 92 31.5% 782 2745.3 4130.0
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 8,167 35.0% 1,488 18.2% 30 1699.2 13175.2
SUBJECT WORD 38 0.2% 19 50.0% 35 1161.9 3128.8
SUBJECT 635 2.7% 241 37.9% 188 4312.5 10017.8
MAJOR SUBJECT 46 0.2% 5 10.9% 22 3378.3 11284.2
EXACT SUBJECT 393 1.7% 106 27.0% 79 4125.2 19753.4
MAJOR XS 42 0.2% 3 7.1% 285 1069.4 1867.8
EXPLODE XS 96 0.4% 15 15.6% 163 26666.0 57687.7
EXPLODE MAJOR 16 0.1% 0 0.0% 2,362 16698.6 46306.7
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 1,165 5.0% 228 19.6% 10 106.1 410.3
LANGUAGE 546 2.3% 29 5.3% 108 1736.4 0.0
PUB TYPE 324 1.4% 32 9.9% 34 377.4 1851.5
Other indexes 379 1.6% 46 12.1% 1 27.8 144.0
By number of indexes:
Multiple 6,716 32.5% 1,410 21.0% 10 841.9 10754.5
Single 13,949 67.5% 2,963 21.2% 29 1502.1 9965.0
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 8 2.5% 3 37.5% 8 15.8 20.4
JOURNAL 80 24.7% 20 25.0% 1 23.6 141.0
EXACT JOURNAL 4 1.2% 2 50.0% 1 1.0 0.0
SUBJECT 197 60.8% 41 20.8% 2 125.7 811.6
EXACT SUBJECT 35 10.8% 9 25.7% 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 324 100% 75 23.1% 2 84.9 647.5
LIMITS:
Number of times limits (bit strings) used: 1,447
Use by bit string (percentage):
Current year minus 5 21.5%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.3%
Current year minus 1 0.6%
Current year 0.5%
English Language 39.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.0%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.3%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.8%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.5%
XS Human 12.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.1%
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 17.1%
PT Journal Article 0.1%
SUBSET AIM 3.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,845
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.4%
Percentage of ORs 3.6%
Percentage of AND NOTs 2.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
BRIEF 63.0%
LONG 0.7%
MEDLINE 1.6%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
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 8.8%
Ten most frequent errors:
1. NS command - no next screen 38.4%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 7.3%
4. DISPLAY command contains invalid word 4.2%
5. PS command - no previous screen 2.5%
6. Search term missing from search command 1.7%
7. Add-on search with invalid index name 1.5%
8. Valid command at an inappropriate time 1.5%
9. DISPLAY command - no FIND results 1.3%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.6%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 19.9%
2. FIND 11.9%
3. BOOKS DATABASE 11.4%
4. MEDLINE BACKFILES 8.0%
5. INDEXES 5.9%
6. COMMANDS 5.7%
7. MAIL 4.7%
8. DISPLAY 3.9%
9. ADD-ON SEARCH 3.1%
10. Unrecognized term 2.3%
11. All others 28.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.6%
2. First word of command is invalid 12.4%
3. FIND command with invalid index name 7.7%
4. DISPLAY command-first of >1 screen 7.1%
5. DISPLAY command - middle of >1 screen 5.0%
6. DISPLAY command - last of >1 screen 4.0%
7. FIND command retrieves >1 book 3.8%
8. NS command - no next screen 3.3%
9. FIND command with zero results 3.2%
10. DISPLAY command-complete in one screen 3.2%
11. All others 23.3%
Ten most frequent SHOW requests:
1. HISTORY 64.8%
2. SEARCH 20.1%
3. MAIL STATUS 4.4%
4. MEDLINE NEWS 2.5%
5. MEDLINE GLOSSARY 1.9%
6. SETTINGS 1.3%
7. MEDLINE STATISTICS 1.3%
8. UPDATE 1.3%
9. MAIL SETTINGS 0.6%
10. 0876 0.6%
11. All others 1.3%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)