MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/30/00 through 10/06/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 158 811 969
Davis 47 842 160 1,049
Irvine 0 396 0 396
Los Angeles 0 495 241 736
Riverside 0 19 72 91
San Diego 97 594 47 738
San Francisco 120 0 1,684 1,804
Santa Barbara 0 17 24 41
Santa Cruz 65 13 50 128
Stanford 368
Other (including DLA) 0 0 1,755 1,755
_______________ _________ _________ _________
Total: 329 2,534 4,844 8,075
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,866 19,023 212,959
MED90 database 975 2,413 16,786
MED85 database 519 1,104 7,084
MED80 database 367 801 4,607
MED75 database 212 428 2,152
MED66 database 136 266 2,012
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 115 193 2,212
2-4 a.m. 43 74 1,017
4-6 a.m. 44 72 1,331
6-8 a.m. 167 361 2,861
8-10 a.m. 885 2,449 25,265
10-12 a.m. 1,435 4,620 41,375
12-2 p.m. 1,490 4,791 48,411
2-4 p.m. 1,788 4,996 43,793
4-6 p.m. 1,185 3,618 34,041
6-8 p.m. 479 1,451 18,360
8-10 p.m. 278 859 19,063
10-12 p.m. 166 551 7,871
__________ __________ __________ _________________
Total: 8,075 24,035 245,600
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 17:53 13:52 17:08 14:09
Median 12:49 8:47 11:04 8:58
Total:
Average 17:53 13:52 17:08 14:09
Median 12:49 8:47 11:04 8:58
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 4.9
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 8,075 100%
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 865.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8442.2
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 57.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,016 24.7%
DISPLAY (excluding automatic displays) 25,382 34.8%
BROWSE 476 0.7%
SELECT 297 0.4%
HELP 543 0.7%
EXPLAIN 481 0.7%
SAVE 5,783 7.9%
SET/RESET 3,633 5.0%
SHOW 278 0.4%
ADD-ON (AND, OR, AND NOT) 4,734 6.5%
LOGON or LOGOFF 9,323 12.8%
COMMENT 1 0.0%
OTHER 4,044 5.5%
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 7,512 29.7% 1,505 20.0% 12 104.1 667.4
TITLE WORD 2,948 11.7% 970 32.9% 6 314.1 2312.0
EXACT TITLE 214 0.8% 65 30.4% 1 34.6 150.9
JOURNAL 1,113 4.4% 376 33.8% 61 1993.6 6477.6
EXACT JOURNAL 281 1.1% 84 29.9% 326 1453.2 3253.6
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 9,229 36.5% 1,771 19.2% 30 1846.5 14069.5
SUBJECT WORD 64 0.3% 27 42.2% 260 8273.4 29481.9
SUBJECT 720 2.9% 243 33.7% 215 3507.4 12173.8
MAJOR SUBJECT 39 0.2% 5 12.8% 179 1177.9 2470.1
EXACT SUBJECT 370 1.5% 87 23.5% 89 1977.2 6204.6
MAJOR XS 83 0.3% 12 14.5% 176 1696.8 3057.6
EXPLODE XS 212 0.8% 30 14.2% 163 3301.9 12326.8
EXPLODE MAJOR 18 0.1% 1 5.6% 43 923.0 2039.4
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 1,064 4.2% 132 12.4% 9 168.2 1181.9
LANGUAGE 617 2.4% 37 6.0% 89 1008.6 0.0
PUB TYPE 469 1.9% 50 10.7% 27 227.2 976.5
Other indexes 360 1.4% 22 6.1% 1 15.1 75.1
By number of indexes:
Multiple 7,301 32.2% 1,702 23.3% 10 367.6 5148.4
Single 15,378 67.8% 3,055 19.9% 29 1508.0 11207.5
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 23 4.9% 3 13.0% 4 7.1 8.2
JOURNAL 58 12.4% 16 27.6% 2 7.9 16.1
EXACT JOURNAL 5 1.1% 0 0.0% 1 2.2 2.7
SUBJECT 355 75.7% 71 20.0% 2 17.9 143.5
EXACT SUBJECT 28 6.0% 2 7.1% 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 469 100% 92 19.6% 2 14.8 124.8
LIMITS:
Number of times limits (bit strings) used: 1,467
Use by bit string (percentage):
Current year minus 5 17.4%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.3%
Current year minus 1 0.5%
Current year 0.5%
English Language 44.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 1.0%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.1%
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 24.7%
PT Journal Article 0.0%
SUBSET AIM 1.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,567
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.0%
Percentage of ORs 3.1%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 63.5%
LONG 0.9%
MEDLINE 0.9%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.8%
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 39.8%
2. First word of command is invalid 26.0%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 2.2%
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 1.5%
9. Command containing escape or arrow key 1.4%
10. DISPLAY command - no FIND results 1.1%
11. All others 14.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.6%
2. LOCATE (article dbs w/o monographs) 11.2%
3. FIND 9.8%
4. MEDLINE BACKFILES 8.5%
5. COMMANDS 5.4%
6. Unrecognized term 4.8%
7. ADD-ON SEARCH 4.2%
8. INDEXES 4.2%
9. MAIL 3.1%
10. DATABASES 2.9%
11. All others 28.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.6%
2. First word of command is invalid 14.0%
3. FIND command with invalid index name 7.2%
4. DISPLAY command-first of >1 screen 6.8%
5. FIND command retrieves >1 book 5.7%
6. DISPLAY command - middle of >1 screen 4.2%
7. NS of SHOW/EXP command-no next screen 3.8%
8. DISPLAY command - last of >1 screen 3.1%
9. FIND command with zero results 2.6%
10. NS command - no next screen 2.3%
11. All others 31.4%
Ten most frequent SHOW requests:
1. HISTORY 81.7%
2. SEARCH 9.9%
3. MAIL STATUS 4.4%
4. SETTINGS 1.6%
5. MEDLINE GLOSSARY 1.6%
6. MAIL SETTINGS 0.4%
7. MEDLINE STATISTICS 0.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)