MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/11/00 through 11/17/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 214 644 858
Davis 37 610 158 805
Irvine 0 415 0 415
Los Angeles 0 311 167 478
Riverside 0 18 48 66
San Diego 122 586 29 737
San Francisco 125 0 1,699 1,824
Santa Barbara 0 54 32 86
Santa Cruz 52 5 95 152
Stanford 277
Other (including DLA) 0 0 1,995 1,995
_______________ _________ _________ _________
Total: 336 2,213 4,867 7,693
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,492 17,660 200,381
MED90 database 942 1,972 11,100
MED85 database 494 1,002 4,535
MED80 database 355 669 2,998
MED75 database 222 407 1,761
MED66 database 188 334 1,888
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 83 299 1,662
2-4 a.m. 20 73 660
4-6 a.m. 26 53 397
6-8 a.m. 134 340 3,673
8-10 a.m. 891 2,508 20,943
10-12 a.m. 1,660 4,558 36,707
12-2 p.m. 1,278 3,682 43,506
2-4 p.m. 1,470 4,280 47,186
4-6 p.m. 1,229 3,510 38,493
6-8 p.m. 467 1,428 15,011
8-10 p.m. 265 807 8,888
10-12 p.m. 170 506 5,537
__________ __________ __________ _________________
Total: 7,693 22,044 222,663
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 16:24 14:07 13:09 14:09
Median 8:04 8:49 9:52 8:56
Total:
Average 16:24 14:07 13:09 14:09
Median 8:04 8:49 9:52 8:56
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 3.1
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 7,693 100%
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 1002.1
Retrievals per search - median 9.0
Retrievals per search - standard deviation 9213.1
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 74.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,483 25.1%
DISPLAY (excluding automatic displays) 22,510 34.3%
BROWSE 305 0.5%
SELECT 230 0.4%
HELP 576 0.9%
EXPLAIN 456 0.7%
SAVE 4,705 7.2%
SET/RESET 3,545 5.4%
SHOW 167 0.3%
ADD-ON (AND, OR, AND NOT) 4,606 7.0%
LOGON or LOGOFF 8,831 13.5%
COMMENT 0 0.0%
OTHER 3,120 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 6,578 27.9% 1,314 20.0% 12 133.2 908.5
TITLE WORD 2,853 12.1% 957 33.5% 8 1626.7 14044.5
EXACT TITLE 180 0.8% 77 42.8% 1 19.9 135.2
JOURNAL 981 4.2% 316 32.2% 129 2308.9 7785.3
EXACT JOURNAL 335 1.4% 92 27.5% 591 2163.9 6739.2
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 8,828 37.5% 1,723 19.5% 31 1639.3 12140.7
SUBJECT WORD 27 0.1% 5 18.5% 212 826.5 2998.1
SUBJECT 568 2.4% 238 41.9% 229 3944.3 12500.6
MAJOR SUBJECT 54 0.2% 6 11.1% 140 2011.7 4508.2
EXACT SUBJECT 371 1.6% 56 15.1% 117 2379.3 7464.9
MAJOR XS 82 0.3% 16 19.5% 338 1938.1 6485.3
EXPLODE XS 144 0.6% 18 12.5% 640 13408.6 47376.5
EXPLODE MAJOR 20 0.1% 0 0.0% 521 15478.5 39341.0
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 1,034 4.4% 143 13.8% 16 384.1 2301.7
LANGUAGE 554 2.4% 19 3.4% 80 659.8 0.0
PUB TYPE 297 1.3% 142 47.8% 28 217.7 727.7
Other indexes 374 1.6% 52 13.9% 1 252.9 2055.6
By number of indexes:
Multiple 7,070 33.6% 1,522 21.5% 11 450.6 4011.3
Single 13,966 66.4% 2,969 21.3% 33 1769.0 12662.4
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 5 1.7% 0 0.0% 4 11.4 14.0
JOURNAL 57 19.2% 14 24.6% 2 21.1 49.4
EXACT JOURNAL 2 0.7% 0 0.0% 1 1.0 0.0
SUBJECT 206 69.4% 33 16.0% 4 86.6 526.6
EXACT SUBJECT 27 9.1% 4 14.8% 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 297 100% 51 17.2% 3 65.0 443.0
LIMITS:
Number of times limits (bit strings) used: 1,452
Use by bit string (percentage):
Current year minus 5 23.3%
Current year minus 4 0.0%
Current year minus 3 0.3%
Current year minus 2 0.3%
Current year minus 1 0.1%
Current year 0.3%
English Language 38.7%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.9%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 6.2%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.1%
XS Rats 0.8%
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 23.6%
PT Journal Article 0.0%
SUBSET AIM 3.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,126
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.1%
Percentage of ORs 3.1%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 64.1%
LONG 0.9%
MEDLINE 1.0%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.4%
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 9.2%
Ten most frequent errors:
1. NS command - no next screen 39.4%
2. First word of command is invalid 26.7%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 3.4%
5. PS command - no previous screen 2.6%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 1.8%
8. Add-on search with invalid index name 1.8%
9. NS of SHOW/EXP command-no next screen 1.5%
10. DISPLAY command-record numbers too large 0.9%
11. All others 12.9%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.0%
2. BOOKS DATABASE 16.2%
3. FIND 9.2%
4. MEDLINE BACKFILES 6.8%
5. DISPLAY 5.9%
6. Unrecognized term 5.5%
7. COMMANDS 5.5%
8. DATABASES 3.5%
9. ADD-ON SEARCH 3.3%
10. MAIL 2.6%
11. All others 26.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.0%
2. First word of command is invalid 16.5%
3. FIND command with invalid index name 7.7%
4. DISPLAY command-first of >1 screen 6.3%
5. DISPLAY command - middle of >1 screen 5.7%
6. DISPLAY command - last of >1 screen 4.1%
7. NS of SHOW/EXP command-no next screen 3.4%
8. FIND command retrieves >1 book 3.1%
9. PS command - no previous screen 3.0%
10. NS command - no next screen 2.8%
11. All others 23.5%
Ten most frequent SHOW requests:
1. HISTORY 69.2%
2. MAIL STATUS 10.8%
3. SEARCH 6.9%
4. SETTINGS 3.8%
5. MEDLINE STATISTICS 2.3%
6. MAIL SETTINGS 1.5%
7. SYSTEM STATISTICS 1.5%
8. MEDLINE NEWS 1.5%
9. G620 0.8%
10. MEDLINE GLOSSARY 0.8%
11. All others 0.8%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)