MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/17/00 through 06/23/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 144 863 1,007
Davis 18 682 209 909
Irvine 0 677 0 677
Los Angeles 0 502 348 850
Riverside 0 37 65 102
San Diego 131 751 62 944
San Francisco 128 0 1,704 1,832
Santa Barbara 0 4 40 44
Santa Cruz 29 9 50 88
Stanford 335
Other (including DLA) 0 0 2,486 2,486
_______________ _________ _________ _________
Total: 306 2,806 5,827 9,274
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,411 20,745 227,052
MED90 database 1,342 3,370 22,927
MED85 database 685 1,417 10,569
MED80 database 431 807 6,988
MED75 database 228 446 2,368
MED66 database 177 382 2,043
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 123 341 2,668
2-4 a.m. 31 116 1,267
4-6 a.m. 41 87 1,019
6-8 a.m. 209 627 6,866
8-10 a.m. 999 3,179 28,158
10-12 a.m. 1,837 4,942 49,657
12-2 p.m. 1,682 4,780 45,504
2-4 p.m. 1,965 5,925 55,448
4-6 p.m. 1,317 3,871 40,747
6-8 p.m. 555 1,680 17,746
8-10 p.m. 248 819 14,240
10-12 p.m. 267 800 8,627
__________ __________ __________ _________________
Total: 9,274 27,167 271,947
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 14:55 14:14 19:03 14:09
Median 10:59 9:35 11:59 9:24
Total:
Average 14:55 14:14 19:03 14:09
Median 10:59 9:35 11:59 9:24
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.7
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 9,274 100%
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 702.9
Retrievals per search - median 8.0
Retrievals per search - standard deviation 5298.3
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.3%
Percent of long searches completed 48.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 20,730 25.9%
DISPLAY (excluding automatic displays) 28,351 35.4%
BROWSE 664 0.8%
SELECT 291 0.4%
HELP 523 0.7%
EXPLAIN 422 0.5%
SAVE 5,417 6.8%
SET/RESET 4,498 5.6%
SHOW 260 0.3%
ADD-ON (AND, OR, AND NOT) 5,442 6.8%
LOGON or LOGOFF 10,030 12.5%
COMMENT 0 0.0%
OTHER 3,385 4.2%
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 9,324 32.0% 1,793 19.2% 11 125.4 790.5
TITLE WORD 3,097 10.6% 930 30.0% 6 360.3 2391.8
EXACT TITLE 509 1.7% 218 42.8% 1 14.8 102.7
JOURNAL 1,362 4.7% 366 26.9% 54 1768.5 5404.1
EXACT JOURNAL 307 1.1% 80 26.1% 298 1800.3 3732.0
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 10,288 35.3% 2,101 20.4% 27 1133.9 7224.4
SUBJECT WORD 11 0.0% 4 36.4% 8 3333.9 5669.4
SUBJECT 762 2.6% 277 36.4% 128 2470.6 7772.2
MAJOR SUBJECT 54 0.2% 4 7.4% 399 4429.9 11474.9
EXACT SUBJECT 315 1.1% 66 20.9% 207 5650.5 23454.3
MAJOR XS 74 0.3% 12 16.2% 624 5774.6 12165.5
EXPLODE XS 200 0.7% 20 10.0% 263 9351.9 27134.7
EXPLODE MAJOR 80 0.3% 0 0.0% 6,456 18181.7 23912.2
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 1,360 4.7% 181 13.3% 12 164.5 1089.5
LANGUAGE 566 1.9% 45 8.0% 70 589.7 0.0
PUB TYPE 661 2.3% 52 7.9% 27 513.1 2574.5
Other indexes 442 1.5% 56 12.7% 1 28.5 212.7
By number of indexes:
Multiple 8,388 32.1% 1,797 21.4% 10 786.2 7054.4
Single 17,705 67.9% 3,603 20.3% 26 976.8 5508.4
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 52 7.9% 1 1.9% 2 4.2 5.4
JOURNAL 334 50.5% 82 24.6% 3 10.6 24.3
EXACT JOURNAL 27 4.1% 7 25.9% 1 1.8 2.1
SUBJECT 222 33.6% 40 18.0% 3 46.6 348.7
EXACT SUBJECT 26 3.9% 7 26.9% 1 3.2 6.6
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 661 100% 137 20.7% 2 21.9 206.6
LIMITS:
Number of times limits (bit strings) used: 1,446
Use by bit string (percentage):
Current year minus 5 15.3%
Current year minus 4 0.0%
Current year minus 3 2.4%
Current year minus 2 0.3%
Current year minus 1 0.4%
Current year 1.0%
English Language 40.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.3%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 9.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.2%
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 23.8%
PT Journal Article 0.5%
SUBSET AIM 3.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 10,132
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 3.4%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
BRIEF 64.0%
LONG 1.0%
MEDLINE 1.0%
FIELDS 3.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.5%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 41.6%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 4.0%
5. Add-on search with invalid index name 1.9%
6. PS command - no previous screen 1.9%
7. Valid command at an inappropriate time 1.6%
8. Search term missing from search command 1.5%
9. Command containing escape or arrow key 1.5%
10. DISPLAY command-record numbers too large 1.2%
11. All others 12.9%
Ten most frequent EXPLAIN requests:
1. FIND 12.3%
2. LOCATE (article dbs w/o monographs) 9.5%
3. BOOKS DATABASE 8.8%
4. MEDLINE BACKFILES 7.8%
5. Unrecognized term 6.6%
6. COMMANDS 6.4%
7. INDEXES 3.8%
8. MAIL 3.6%
9. DATABASES 3.6%
10. ADD-ON SEARCH 3.6%
11. All others 28.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.1%
2. First word of command is invalid 14.7%
3. DISPLAY command-first of >1 screen 7.4%
4. FIND command with invalid index name 7.3%
5. DISPLAY command - middle of >1 screen 5.9%
6. FIND command retrieves >1 book 4.4%
7. NS command - no next screen 3.4%
8. NS of SHOW/EXP command-no next screen 2.9%
9. FIND command with zero results 2.3%
10. DISPLAY command - last of >1 screen 2.2%
11. All others 34.1%
Ten most frequent SHOW requests:
1. HISTORY 73.1%
2. SEARCH 10.7%
3. MAIL STATUS 10.2%
4. SETTINGS 3.0%
5. MEDLINE GLOSSARY 1.5%
6. DATABASES 1.0%
7. DISPLAY 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)