MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/02/01 through 06/08/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 69 545 614
Davis 29 461 98 588
Irvine 0 394 0 394
Los Angeles 0 3 152 155
Riverside 0 7 16 23
San Diego 171 627 87 885
San Francisco 85 0 1,287 1,372
Santa Barbara 0 13 21 34
Santa Cruz 2 7 33 42
Stanford 235
Other (including DLA) 0 0 1,951 1,951
_______________ _________ _________ _________
Total: 287 1,581 4,190 6,293
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,484 14,348 146,852
MED90 database 791 1,543 10,410
MED85 database 412 728 4,698
MED80 database 268 496 2,923
MED75 database 182 314 1,644
MED66 database 156 333 2,804
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 72 281 4,236
2-4 a.m. 24 46 765
4-6 a.m. 37 69 1,026
6-8 a.m. 137 362 4,015
8-10 a.m. 640 1,906 18,217
10-12 a.m. 1,138 3,289 30,448
12-2 p.m. 1,172 3,021 26,748
2-4 p.m. 1,369 3,836 33,945
4-6 p.m. 992 2,710 26,572
6-8 p.m. 376 1,055 11,712
8-10 p.m. 168 569 6,044
10-12 p.m. 168 618 5,603
__________ __________ __________ _________________
Total: 6,293 17,762 169,331
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 14:22 13:42 20:57 14:15
Median 8:15 9:01 14:13 9:49
Total:
Average 14:22 13:42 20:57 14:15
Median 8:15 9:01 14:13 9:49
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 6,293 100%
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 911.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7180.4
Percent of searches completed with 0 results 21.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed 68.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 13,225 24.9%
DISPLAY (excluding automatic displays) 19,193 36.1%
BROWSE 226 0.4%
SELECT 99 0.2%
HELP 322 0.6%
EXPLAIN 291 0.5%
SAVE 3,101 5.8%
SET/RESET 3,076 5.8%
SHOW 240 0.5%
ADD-ON (AND, OR, AND NOT) 3,731 7.0%
LOGON or LOGOFF 6,987 13.1%
COMMENT 0 0.0%
OTHER 2,708 5.1%
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 5,751 30.5% 1,213 21.1% 12 113.7 701.5
TITLE WORD 2,458 13.0% 797 32.4% 5 422.3 4633.0
EXACT TITLE 215 1.1% 93 43.3% 1 20.7 132.9
JOURNAL 1,010 5.4% 323 32.0% 84 2577.6 11435.9
EXACT JOURNAL 311 1.6% 77 24.8% 1,658 7786.5 15234.2
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 6,632 35.1% 1,331 20.1% 31 1618.1 10872.1
SUBJECT WORD 13 0.1% 8 61.5% 8 37.8 61.1
SUBJECT 368 1.9% 133 36.1% 256 3920.7 11779.0
MAJOR SUBJECT 45 0.2% 9 20.0% 217 3139.8 7581.2
EXACT SUBJECT 194 1.0% 48 24.7% 62 850.6 2545.4
MAJOR XS 48 0.3% 1 2.1% 103 1043.1 2201.9
EXPLODE XS 68 0.4% 18 26.5% 116 5265.5 10072.1
EXPLODE MAJOR 50 0.3% 3 6.0% 536 5615.1 14723.9
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 980 5.2% 177 18.1% 9 156.5 1476.8
LANGUAGE 327 1.7% 16 4.9% 87 745.0 0.0
PUB TYPE 226 1.2% 20 8.8% 35 162.0 380.5
Other indexes 135 0.7% 31 23.0% 1 2933.0 12874.0
By number of indexes:
Multiple 5,725 33.8% 1,292 22.6% 11 689.1 5820.8
Single 11,197 66.2% 2,402 21.4% 31 1480.3 9274.1
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 13 5.8% 1 7.7% 2 4.6 6.4
JOURNAL 48 21.2% 13 27.1% 2 6.4 14.7
EXACT JOURNAL 4 1.8% 1 25.0% 1 1.0 0.0
SUBJECT 138 61.1% 24 17.4% 2 9.5 16.2
EXACT SUBJECT 23 10.2% 3 13.0% 1 2.5 4.8
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 226 100% 42 18.6% 2 7.7 14.6
LIMITS:
Number of times limits (bit strings) used: 982
Use by bit string (percentage):
Current year minus 5 25.2%
Current year minus 4 0.0%
Current year minus 3 0.6%
Current year minus 2 0.2%
Current year minus 1 0.8%
Current year 0.4%
English Language 35.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.2%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.7%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.7%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 6.2%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.3%
XS Middle Age 1.6%
XS Rats 2.7%
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 22.4%
PT Journal Article 0.0%
SUBSET AIM 1.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.1%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,508
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.1%
Percentage of ORs 4.2%
Percentage of AND NOTs 2.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
BRIEF 61.2%
LONG 1.1%
MEDLINE 1.9%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 38.8%
2. First word of command is invalid 24.7%
3. FIND command with invalid index name 5.6%
4. DISPLAY command contains invalid word 4.9%
5. DISPLAY command - no FIND results 1.8%
6. DISPLAY command-record numbers too large 1.8%
7. Add-on search with invalid index name 1.8%
8. Search term missing from search command 1.7%
9. PS command - no previous screen 1.5%
10. Valid command at an inappropriate time 1.4%
11. All others 16.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 11.3%
2. LOCATE (article dbs w/o monographs) 8.2%
3. INDEXES 7.2%
4. COMMANDS 6.9%
5. MEDLINE BACKFILES 6.5%
6. FIND 6.5%
7. DATABASES 6.2%
8. ADD-ON SEARCH 5.8%
9. Unrecognized term 3.8%
10. SAVE 3.1%
11. All others 33.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 17.9%
2. First word of command is invalid 12.7%
3. DISPLAY command - middle of >1 screen 7.7%
4. DISPLAY command-first of >1 screen 6.7%
5. FIND command with invalid index name 6.0%
6. FIND command retrieves >1 book 5.1%
7. NS command - no next screen 3.1%
8. NS of SHOW/EXP command-no next screen 2.8%
9. DISPLAY command - last of >1 screen 2.6%
10. FIND command with zero results 2.4%
11. All others 34.4%
Ten most frequent SHOW requests:
1. HISTORY 68.2%
2. SEARCH 10.8%
3. MAIL STATUS 6.1%
4. MAIL SETTINGS 3.4%
5. SETTINGS 2.0%
6. DATABASES 2.0%
7. MEDLINE GLOSSARY 1.4%
8. G620 0.7%
9. LINESIZE 0.7%
10. 0634 0.7%
11. All others 4.1%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)