MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/27/01 through 11/02/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 67 411 478
Davis 12 436 51 499
Irvine 0 270 0 270
Los Angeles 0 21 93 114
Riverside 0 2 43 45
San Diego 102 404 18 524
San Francisco 73 0 735 808
Santa Barbara 0 1 10 11
Santa Cruz 0 2 26 28
Stanford 100
Other (including DLA) 0 0 1,586 1,586
_______________ _________ _________ _________
Total: 187 1,203 2,973 4,463
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,279 10,245 115,516
MED90 database 514 1,190 7,107
MED85 database 258 524 2,365
MED80 database 183 318 1,446
MED75 database 132 231 1,213
MED66 database 97 234 1,498
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 25 79 896
2-4 a.m. 16 51 501
4-6 a.m. 25 77 516
6-8 a.m. 106 333 5,176
8-10 a.m. 591 1,597 13,371
10-12 a.m. 933 2,377 24,382
12-2 p.m. 833 2,443 19,408
2-4 p.m. 915 2,541 29,044
4-6 p.m. 584 1,729 17,323
6-8 p.m. 258 807 9,083
8-10 p.m. 112 397 4,741
10-12 p.m. 65 311 4,704
__________ __________ __________ _________________
Total: 4,463 12,742 129,145
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 18:15 15:33 17:29 15:29
Median 11:47 10:37 13:01 10:39
Total:
Average 18:15 15:33 17:29 15:29
Median 11:47 10:37 13:01 10:39
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 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 4,463 100%
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 800.7
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8445.7
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 59.5%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,544 25.7%
DISPLAY (excluding automatic displays) 13,236 35.6%
BROWSE 180 0.5%
SELECT 87 0.2%
HELP 222 0.6%
EXPLAIN 198 0.5%
SAVE 2,379 6.4%
SET/RESET 2,349 6.3%
SHOW 123 0.3%
ADD-ON (AND, OR, AND NOT) 2,571 6.9%
LOGON or LOGOFF 4,651 12.5%
COMMENT 1 0.0%
OTHER 1,661 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 3,879 28.7% 802 20.7% 11 142.7 874.0
TITLE WORD 1,908 14.1% 634 33.2% 6 558.0 4425.0
EXACT TITLE 92 0.7% 35 38.0% 1 68.1 319.2
JOURNAL 604 4.5% 176 29.1% 136 2144.1 6962.6
EXACT JOURNAL 251 1.9% 71 28.3% 1,035 1925.6 3072.4
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 4,863 36.0% 960 19.7% 28 1532.6 10469.3
SUBJECT WORD 15 0.1% 5 33.3% 68 734.5 1100.5
SUBJECT 270 2.0% 97 35.9% 472 7700.6 49627.6
MAJOR SUBJECT 19 0.1% 3 15.8% 435 1257.5 1756.3
EXACT SUBJECT 193 1.4% 37 19.2% 79 2028.2 5888.6
MAJOR XS 25 0.2% 0 0.0% 330 3605.0 7260.0
EXPLODE XS 21 0.2% 3 14.3% 1,039 3429.6 5570.6
EXPLODE MAJOR 8 0.1% 1 12.5% 3,192 7260.9 7834.6
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 749 5.5% 82 10.9% 13 133.9 353.2
LANGUAGE 228 1.7% 8 3.5% 69 1178.4 0.0
PUB TYPE 178 1.3% 14 7.9% 46 310.7 1498.3
Other indexes 160 1.2% 20 12.5% 1 11.0 31.2
By number of indexes:
Multiple 3,963 32.8% 850 21.4% 10 302.9 2958.3
Single 8,119 67.2% 1,738 21.4% 31 1442.4 11701.0
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 1 0.6% 0 0.0% 89 89.0 0.0
JOURNAL 30 16.9% 6 20.0% 3 7.9 11.6
EXACT JOURNAL 5 2.8% 2 40.0% 1 1.0 0.0
SUBJECT 126 70.8% 28 22.2% 1 8.3 20.4
EXACT SUBJECT 16 9.0% 2 12.5% 1 5.2 5.4
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 178 100% 38 21.3% 2 8.3 19.1
LIMITS:
Number of times limits (bit strings) used: 879
Use by bit string (percentage):
Current year minus 5 29.0%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.0%
Current year minus 1 0.1%
Current year 0.3%
English Language 28.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.0%
XS Adult 0.7%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 1.4%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 8.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.9%
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 23.9%
PT Journal Article 0.3%
SUBSET AIM 2.2%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.6%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,520
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.5%
Percentage of ORs 2.8%
Percentage of AND NOTs 0.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.6%
BRIEF 62.2%
LONG 1.1%
MEDLINE 1.0%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 27.1%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 42.8%
2. First word of command is invalid 25.1%
3. FIND command with invalid index name 5.9%
4. DISPLAY command contains invalid word 4.2%
5. Add-on search with invalid index name 1.9%
6. Valid command at an inappropriate time 1.7%
7. Search term missing from search command 1.7%
8. PS command - no previous screen 1.5%
9. DISPLAY command - no FIND results 1.4%
10. Command containing escape or arrow key 1.2%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 17.2%
2. LOCATE (article dbs w/o monographs) 14.1%
3. FIND 9.1%
4. MAIL 6.6%
5. COMMANDS 5.1%
6. ADD-ON SEARCH 4.5%
7. DATABASES 3.5%
8. DISPLAY 3.5%
9. MEDLINE BACKFILES 3.5%
10. A059 2.5%
11. All others 24.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 25.7%
2. First word of command is invalid 14.8%
3. DISPLAY command - middle of >1 screen 7.1%
4. FIND command retrieves >1 book 6.0%
5. DISPLAY command-first of >1 screen 5.2%
6. NS command - no next screen 4.5%
7. FIND command with invalid index name 4.3%
8. DISPLAY command - last of >1 screen 2.6%
9. NS of SHOW/EXP command-no next screen 2.6%
10. DISPLAY command-complete in one screen 2.4%
11. All others 30.3%
Ten most frequent SHOW requests:
1. HISTORY 57.1%
2. SEARCH 26.5%
3. MEDLINE NEWS 4.1%
4. MAIL STATUS 4.1%
5. SETTINGS 2.0%
6. SYSTEMS INFORMATION 2.0%
7. LIBRARY LOCATIONS 1.0%
8. SYSTEM STATISTICS 1.0%
9. MEDLINE STATISTICS 1.0%
10. UPDATE 1.0%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)