MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/08/00 through 07/14/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 175 692 867
Davis 30 662 183 875
Irvine 0 413 0 413
Los Angeles 0 389 260 649
Riverside 0 33 96 129
San Diego 124 665 40 829
San Francisco 119 0 1,950 2,069
Santa Barbara 0 11 62 73
Santa Cruz 30 11 73 114
Stanford 344
Other (including DLA) 0 0 2,233 2,233
_______________ _________ _________ _________
Total: 303 2,359 5,589 8,595
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,165 20,693 238,794
MED90 database 1,093 2,374 16,624
MED85 database 581 1,110 6,961
MED80 database 384 744 4,120
MED75 database 205 386 2,471
MED66 database 167 354 2,539
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 101 220 2,862
2-4 a.m. 39 89 769
4-6 a.m. 29 90 1,339
6-8 a.m. 180 474 5,085
8-10 a.m. 935 2,782 25,379
10-12 a.m. 1,697 4,772 46,256
12-2 p.m. 1,560 4,250 42,628
2-4 p.m. 1,786 5,236 58,443
4-6 p.m. 1,287 4,395 48,239
6-8 p.m. 440 1,650 18,145
8-10 p.m. 316 1,023 10,590
10-12 p.m. 225 680 11,774
__________ __________ __________ _________________
Total: 8,595 25,661 271,509
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 14:10 13:52 15:34 13:50
Median 10:44 8:03 8:52 8:22
Total:
Average 14:10 13:52 15:34 13:50
Median 10:44 8:03 8:52 8:22
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.5
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 8,595 100%
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 3.0
Retrievals per search - average 857.9
Retrievals per search - median 10.0
Retrievals per search - standard deviation 8513.1
Percent of searches completed with 0 results 19.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 66.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 19,372 24.9%
DISPLAY (excluding automatic displays) 27,714 35.6%
BROWSE 275 0.4%
SELECT 164 0.2%
HELP 520 0.7%
EXPLAIN 455 0.6%
SAVE 6,441 8.3%
SET/RESET 3,733 4.8%
SHOW 245 0.3%
ADD-ON (AND, OR, AND NOT) 5,248 6.7%
LOGON or LOGOFF 10,226 13.1%
COMMENT 1 0.0%
OTHER 3,468 4.5%
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 8,667 31.7% 1,631 18.8% 13 108.9 743.5
TITLE WORD 3,172 11.6% 924 29.1% 7 466.6 2895.4
EXACT TITLE 194 0.7% 98 50.5% 1 25.9 152.5
JOURNAL 1,294 4.7% 339 26.2% 149 1644.5 4464.1
EXACT JOURNAL 260 1.0% 65 25.0% 406 2336.1 4192.3
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 9,950 36.4% 1,857 18.7% 29 1833.2 14480.6
SUBJECT WORD 36 0.1% 13 36.1% 36 1684.4 4137.4
SUBJECT 715 2.6% 246 34.4% 182 4442.9 12839.8
MAJOR SUBJECT 93 0.3% 18 19.4% 74 1139.3 2898.5
EXACT SUBJECT 211 0.8% 39 18.5% 79 1496.3 4011.0
MAJOR XS 31 0.1% 3 9.7% 4,442 4930.4 5210.0
EXPLODE XS 153 0.6% 26 17.0% 34 3172.9 9657.1
EXPLODE MAJOR 31 0.1% 0 0.0% 883 8927.1 21129.5
TREE NUMBER 1 0.0% 0 0.0% 3,965 3965.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1,175 4.3% 176 15.0% 11 129.5 422.9
LANGUAGE 597 2.2% 22 3.7% 74 630.0 0.0
PUB TYPE 272 1.0% 32 11.8% 29 712.9 2777.9
Other indexes 336 1.2% 43 12.8% 1 11.7 54.8
By number of indexes:
Multiple 7,980 32.5% 1,668 20.9% 11 736.1 9703.8
Single 16,570 67.5% 3,208 19.4% 29 1290.1 9684.7
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 7 2.6% 1 14.3% 24 72.7 91.5
JOURNAL 61 22.4% 11 18.0% 2 5.7 10.9
EXACT JOURNAL 24 8.8% 5 20.8% 1 1.2 0.7
SUBJECT 177 65.1% 27 15.3% 3 47.9 306.4
EXACT SUBJECT 3 1.1% 0 0.0% 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 272 100% 44 16.2% 2 34.8 249.5
LIMITS:
Number of times limits (bit strings) used: 1,430
Use by bit string (percentage):
Current year minus 5 13.6%
Current year minus 4 0.0%
Current year minus 3 1.4%
Current year minus 2 0.4%
Current year minus 1 0.6%
Current year 0.6%
English Language 46.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.3%
XS Adult 0.2%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.2%
XS Infant 0.0%
XS Infant, Newborn 0.4%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
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 24.3%
PT Journal Article 0.1%
SUBSET AIM 3.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 9,156
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.9%
Percentage of ORs 3.6%
Percentage of AND NOTs 1.4%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 65.3%
LONG 1.2%
MEDLINE 0.7%
FIELDS 2.6%
PERIODICALS 0.0%
BROWSE REVIEW 0.7%
BROWSE LONG 0.3%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.1%
Ten most frequent errors:
1. NS command - no next screen 43.1%
2. First word of command is invalid 25.6%
3. FIND command with invalid index name 6.1%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 2.0%
6. Add-on search with invalid index name 1.7%
7. Valid command at an inappropriate time 1.7%
8. Search term missing from search command 1.3%
9. DISPLAY command-record numbers too large 1.2%
10. DISPLAY command - no FIND results 1.0%
11. All others 12.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.8%
2. FIND 9.5%
3. LOCATE (article dbs w/o monographs) 8.8%
4. MEDLINE BACKFILES 8.4%
5. Unrecognized term 5.9%
6. COMMANDS 5.3%
7. DATABASES 4.6%
8. MAIL 4.0%
9. ADD-ON SEARCH 3.7%
10. INDEXES 3.5%
11. All others 30.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.4%
2. First word of command is invalid 12.7%
3. DISPLAY command-first of >1 screen 7.0%
4. FIND command with invalid index name 6.3%
5. DISPLAY command - middle of >1 screen 4.6%
6. FIND command retrieves >1 book 4.5%
7. NS command - no next screen 3.6%
8. NS of SHOW/EXP command-no next screen 3.2%
9. FIND command with zero results 2.8%
10. Add-on without index name 2.6%
11. All others 32.5%
Ten most frequent SHOW requests:
1. HISTORY 61.9%
2. MAIL STATUS 14.2%
3. SEARCH 13.6%
4. MAIL SETTINGS 3.4%
5. SETTINGS 3.4%
6. MEDLINE GLOSSARY 1.1%
7. PAGING 0.6%
8. LOCAL INFORMATION 0.6%
9. LIBRARY LOCATIONS 0.6%
10. DATABASES 0.6%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)