MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/23/00 through 09/29/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 193 730 923
Davis 41 892 174 1,107
Irvine 0 369 0 369
Los Angeles 0 432 167 599
Riverside 0 11 55 66
San Diego 181 758 68 1,007
San Francisco 100 0 1,671 1,771
Santa Barbara 0 13 44 57
Santa Cruz 9 25 70 104
Stanford 319
Other (including DLA) 0 0 2,095 2,095
_______________ _________ _________ _________
Total: 331 2,693 5,074 8,417
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,100 19,617 252,838
MED90 database 1,080 2,328 15,027
MED85 database 565 1,062 6,132
MED80 database 344 710 4,391
MED75 database 187 372 1,928
MED66 database 141 298 1,891
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 114 293 3,204
2-4 a.m. 36 61 1,517
4-6 a.m. 29 97 1,152
6-8 a.m. 180 532 4,088
8-10 a.m. 948 2,605 23,746
10-12 a.m. 1,689 4,903 46,839
12-2 p.m. 1,455 4,226 40,806
2-4 p.m. 1,611 4,765 49,590
4-6 p.m. 1,250 3,464 38,233
6-8 p.m. 524 1,519 46,402
8-10 p.m. 332 1,109 16,645
10-12 p.m. 249 813 9,985
__________ __________ __________ _________________
Total: 8,417 24,387 282,207
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 16:29 14:03 21:32 14:32
Median 11:29 8:33 13:05 9:03
Total:
Average 16:29 14:03 21:32 14:32
Median 11:29 8:33 13:05 9:03
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.7
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 8,417 100%
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 717.9
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6241.7
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.5%
Percent of long searches completed 61.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,481 24.8%
DISPLAY (excluding automatic displays) 26,203 35.1%
BROWSE 418 0.6%
SELECT 202 0.3%
HELP 541 0.7%
EXPLAIN 409 0.5%
SAVE 6,079 8.1%
SET/RESET 3,835 5.1%
SHOW 248 0.3%
ADD-ON (AND, OR, AND NOT) 4,976 6.7%
LOGON or LOGOFF 9,682 13.0%
COMMENT 0 0.0%
OTHER 3,584 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 7,598 28.9% 1,504 19.8% 13 101.4 497.9
TITLE WORD 2,996 11.4% 975 32.5% 8 538.1 3864.6
EXACT TITLE 162 0.6% 91 56.2% 1 28.0 113.6
JOURNAL 1,074 4.1% 301 28.0% 91 2107.0 7770.1
EXACT JOURNAL 375 1.4% 108 28.8% 301 1451.3 2636.2
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 9,852 37.5% 1,884 19.1% 26 1191.6 8316.5
SUBJECT WORD 32 0.1% 10 31.3% 4 17982.3 70265.2
SUBJECT 745 2.8% 263 35.3% 122 3549.0 17314.2
MAJOR SUBJECT 33 0.1% 5 15.2% 338 1388.1 2136.6
EXACT SUBJECT 442 1.7% 92 20.8% 49 2126.8 7993.9
MAJOR XS 53 0.2% 12 22.6% 536 1233.9 1978.2
EXPLODE XS 242 0.9% 31 12.8% 61 2654.2 6615.3
EXPLODE MAJOR 65 0.2% 6 9.2% 159 6698.1 14536.2
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 1,001 3.8% 134 13.4% 14 171.1 585.8
LANGUAGE 637 2.4% 21 3.3% 73 673.1 0.0
PUB TYPE 413 1.6% 39 9.4% 29 168.1 519.5
Other indexes 461 1.8% 65 14.1% 1 16.2 122.1
By number of indexes:
Multiple 7,750 33.1% 1,663 21.5% 11 446.8 6719.4
Single 15,642 66.9% 3,220 20.6% 32 1180.5 7324.7
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 41 9.9% 5 12.2% 3 19.2 81.6
JOURNAL 66 16.0% 21 31.8% 1 2.5 3.3
EXACT JOURNAL 5 1.2% 0 0.0% 1 1.4 0.5
SUBJECT 281 68.0% 52 18.5% 3 12.2 44.7
EXACT SUBJECT 20 4.8% 5 25.0% 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 413 100% 83 20.1% 2 11.0 46.0
LIMITS:
Number of times limits (bit strings) used: 1,735
Use by bit string (percentage):
Current year minus 5 15.2%
Current year minus 4 0.0%
Current year minus 3 2.0%
Current year minus 2 0.3%
Current year minus 1 0.1%
Current year 0.3%
English Language 38.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 1.2%
XS Adult 0.5%
XS Aged 0.3%
XS Animal 2.1%
XS Case Report 0.0%
XS Child 1.6%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.4%
XS Infant 0.0%
XS Infant, Newborn 0.3%
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 27.0%
PT Journal Article 0.0%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,995
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.4%
Percentage of ORs 2.5%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 63.2%
LONG 1.0%
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 27.6%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 41.1%
2. First word of command is invalid 25.5%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 2.1%
6. Add-on search with invalid index name 2.0%
7. Valid command at an inappropriate time 1.8%
8. Search term missing from search command 1.6%
9. DISPLAY command-record numbers too large 1.1%
10. DISPLAY command - no FIND results 1.0%
11. All others 13.5%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.4%
2. LOCATE (article dbs w/o monographs) 11.7%
3. MEDLINE BACKFILES 8.3%
4. FIND 8.1%
5. ADD-ON SEARCH 4.6%
6. DISPLAY 4.4%
7. INDEXES 3.9%
8. COMMANDS 3.9%
9. 3304 3.2%
10. MAIL 2.9%
11. All others 28.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.8%
2. First word of command is invalid 18.3%
3. DISPLAY command-first of >1 screen 7.1%
4. FIND command retrieves >1 book 6.5%
5. FIND command with invalid index name 6.4%
6. DISPLAY command - middle of >1 screen 3.4%
7. FIND command with zero results 3.2%
8. NS command - no next screen 2.7%
9. DISPLAY command-complete in one screen 2.4%
10. DISPLAY command - last of >1 screen 2.3%
11. All others 35.5%
Ten most frequent SHOW requests:
1. HISTORY 79.0%
2. SEARCH 10.7%
3. MAIL STATUS 3.3%
4. SETTINGS 2.3%
5. MAIL SETTINGS 1.4%
6. COMMENTS 0.5%
7. DATES 0.5%
8. LANGUAGES 0.5%
9. TIMEOUT SETTING 0.5%
10. DISPLAY 0.5%
11. All others 0.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)