MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/07/00 through 10/13/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 179 748 927
Davis 25 828 212 1,065
Irvine 0 405 0 405
Los Angeles 0 475 254 729
Riverside 0 24 71 95
San Diego 140 536 44 720
San Francisco 108 0 1,587 1,695
Santa Barbara 0 28 26 54
Santa Cruz 14 23 191 228
Stanford 260
Other (including DLA) 0 0 1,961 1,961
_______________ _________ _________ _________
Total: 287 2,498 5,094 8,139
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,933 19,255 222,765
MED90 database 1,036 2,277 14,344
MED85 database 526 1,017 5,644
MED80 database 324 592 2,937
MED75 database 187 337 2,232
MED66 database 133 297 2,049
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 63 177 2,461
2-4 a.m. 35 80 840
4-6 a.m. 41 145 1,991
6-8 a.m. 205 506 7,511
8-10 a.m. 911 2,588 27,398
10-12 a.m. 1,480 4,122 45,540
12-2 p.m. 1,577 4,568 40,721
2-4 p.m. 1,686 5,095 52,451
4-6 p.m. 1,151 3,346 35,282
6-8 p.m. 427 1,447 15,476
8-10 p.m. 367 1,087 12,466
10-12 p.m. 196 614 7,834
__________ __________ __________ _________________
Total: 8,139 23,775 249,971
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 15:51 14:02 18:31 14:31
Median 12:26 9:14 12:17 9:37
Total:
Average 15:51 14:02 18:31 14:31
Median 12:26 9:14 12:17 9:37
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 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 8,139 100%
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 963.8
Retrievals per search - median 9.0
Retrievals per search - standard deviation 10052.3
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.3%
Percent of long searches completed 62.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,097 24.8%
DISPLAY (excluding automatic displays) 25,328 34.8%
BROWSE 442 0.6%
SELECT 202 0.3%
HELP 651 0.9%
EXPLAIN 520 0.7%
SAVE 6,229 8.5%
SET/RESET 3,631 5.0%
SHOW 247 0.3%
ADD-ON (AND, OR, AND NOT) 4,650 6.4%
LOGON or LOGOFF 9,475 13.0%
COMMENT 0 0.0%
OTHER 3,413 4.7%
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 7,397 29.6% 1,454 19.7% 13 110.7 708.9
TITLE WORD 2,875 11.5% 918 31.9% 8 370.3 1928.7
EXACT TITLE 150 0.6% 82 54.7% 1 25.5 125.5
JOURNAL 1,324 5.3% 404 30.5% 218 2453.3 6793.7
EXACT JOURNAL 304 1.2% 102 33.6% 332 2600.3 4710.6
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 8,987 35.9% 1,648 18.3% 28 1575.3 11849.7
SUBJECT WORD 24 0.1% 12 50.0% 390 767.9 878.7
SUBJECT 781 3.1% 324 41.5% 316 3155.3 11424.5
MAJOR SUBJECT 37 0.1% 1 2.7% 447 3489.8 5906.2
EXACT SUBJECT 389 1.6% 90 23.1% 154 2025.2 11905.7
MAJOR XS 85 0.3% 12 14.1% 1,663 6356.9 7734.1
EXPLODE XS 142 0.6% 22 15.5% 817 30445.9 93622.8
EXPLODE MAJOR 13 0.1% 0 0.0% 1,052 13675.9 34412.7
TREE NUMBER 2 0.0% 1 50.0% 4,673 4673.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1,201 4.8% 163 13.6% 11 227.0 1310.9
LANGUAGE 478 1.9% 26 5.4% 93 1475.5 0.0
PUB TYPE 437 1.7% 39 8.9% 24 293.3 1994.3
Other indexes 443 1.8% 54 12.2% 1 171.0 2745.1
By number of indexes:
Multiple 7,050 31.1% 1,528 21.7% 11 389.0 4847.6
Single 15,628 68.9% 3,186 20.4% 30 1657.3 13454.1
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 35 8.0% 4 11.4% 1 11.1 40.8
JOURNAL 96 22.0% 20 20.8% 1 9.7 51.3
EXACT JOURNAL 2 0.5% 0 0.0% 2 1.5 0.7
SUBJECT 267 61.1% 42 15.7% 2 6.1 11.2
EXACT SUBJECT 35 8.0% 10 28.6% 1 4.6 12.5
TREE NUMBER 2 0.5% 1 50.0% 8 8.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 437 100% 77 17.6% 1 7.2 27.9
LIMITS:
Number of times limits (bit strings) used: 1,370
Use by bit string (percentage):
Current year minus 5 24.0%
Current year minus 4 0.0%
Current year minus 3 1.1%
Current year minus 2 0.1%
Current year minus 1 0.6%
Current year 0.5%
English Language 35.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.2%
XS Animal 0.3%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 8.7%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.2%
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 24.0%
PT Journal Article 0.2%
SUBSET AIM 2.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,001
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.8%
Percentage of ORs 3.0%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.5%
BRIEF 65.6%
LONG 0.9%
MEDLINE 0.7%
FIELDS 3.0%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.3%
Ten most frequent errors:
1. NS command - no next screen 39.7%
2. First word of command is invalid 26.5%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 2.4%
6. Add-on search with invalid index name 2.0%
7. Search term missing from search command 2.0%
8. Valid command at an inappropriate time 1.9%
9. Command containing escape or arrow key 1.3%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 12.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 18.3%
2. BOOKS DATABASE 14.6%
3. FIND 8.5%
4. Unrecognized term 7.3%
5. MEDLINE BACKFILES 6.3%
6. COMMANDS 5.8%
7. DISPLAY 4.6%
8. INDEXES 2.9%
9. MAIL 2.5%
10. 3304 2.5%
11. All others 28.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 17.9%
2. First word of command is invalid 15.2%
3. FIND command with invalid index name 8.4%
4. DISPLAY command-first of >1 screen 6.6%
5. FIND command retrieves >1 book 5.9%
6. NS of SHOW/EXP command-no next screen 4.7%
7. DISPLAY command - middle of >1 screen 3.7%
8. DISPLAY command - last of >1 screen 3.2%
9. NS command - no next screen 2.9%
10. PS command - no previous screen 2.6%
11. All others 26.7%
Ten most frequent SHOW requests:
1. HISTORY 66.2%
2. SEARCH 16.9%
3. MAIL STATUS 4.5%
4. SETTINGS 3.0%
5. MEDLINE GLOSSARY 3.0%
6. UPDATE 2.0%
7. MAIL SETTINGS 1.5%
8. SYSTEM STATISTICS 1.0%
9. 0987 0.5%
10. 2242 0.5%
11. All others 1.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)