MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/10/01 through 11/16/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 76 398 474
Davis 22 339 89 450
Irvine 0 229 0 229
Los Angeles 0 32 80 112
Riverside 0 7 25 32
San Diego 57 309 10 376
San Francisco 74 0 857 931
Santa Barbara 0 0 33 33
Santa Cruz 0 6 24 30
Stanford 57
Other (including DLA) 0 0 1,445 1,445
_______________ _________ _________ _________
Total: 153 998 2,961 4,169
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 2,995 9,064 95,605
MED90 database 485 1,232 12,552
MED85 database 286 700 11,183
MED80 database 172 395 2,622
MED75 database 129 244 1,457
MED66 database 102 216 2,172
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 17 37 431
2-4 a.m. 24 74 715
4-6 a.m. 19 41 168
6-8 a.m. 92 330 3,175
8-10 a.m. 461 1,173 9,747
10-12 a.m. 830 2,212 14,119
12-2 p.m. 792 2,330 25,583
2-4 p.m. 852 2,479 25,847
4-6 p.m. 533 1,566 16,328
6-8 p.m. 274 870 15,763
8-10 p.m. 161 462 3,419
10-12 p.m. 114 277 10,296
__________ __________ __________ _________________
Total: 4,169 11,851 125,591
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 16:23 14:53 16:20 14:54
Median 11:26 9:45 10:53 10:16
Total:
Average 16:23 14:53 16:20 14:54
Median 11:26 9:45 10:53 10:16
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.8
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 4,169 100%
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 949.9
Retrievals per search - median 8.0
Retrievals per search - standard deviation 10639.5
Percent of searches completed with 0 results 21.0%
Percent of searches entered that are long 0.3%
Percent of long searches completed 57.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 8,610 25.7%
DISPLAY (excluding automatic displays) 11,500 34.3%
BROWSE 245 0.7%
SELECT 78 0.2%
HELP 245 0.7%
EXPLAIN 170 0.5%
SAVE 2,073 6.2%
SET/RESET 2,255 6.7%
SHOW 122 0.4%
ADD-ON (AND, OR, AND NOT) 2,617 7.8%
LOGON or LOGOFF 4,193 12.5%
COMMENT 0 0.0%
OTHER 1,429 4.3%
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 3,571 28.9% 785 22.0% 11 140.6 968.4
TITLE WORD 1,806 14.6% 554 30.7% 6 417.6 2636.5
EXACT TITLE 75 0.6% 31 41.3% 3 38.8 78.0
JOURNAL 652 5.3% 182 27.9% 345 2063.0 6090.0
EXACT JOURNAL 287 2.3% 74 25.8% 1,199 2242.8 3881.5
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 3,894 31.5% 766 19.7% 31 2229.3 19586.7
SUBJECT WORD 6 0.0% 4 66.7% 19 19.0 24.0
SUBJECT 282 2.3% 90 31.9% 481 5124.0 17334.9
MAJOR SUBJECT 23 0.2% 3 13.0% 108 2204.8 5077.6
EXACT SUBJECT 217 1.8% 55 25.3% 109 2560.7 10603.9
MAJOR XS 42 0.3% 7 16.7% 568 1646.0 3349.0
EXPLODE XS 26 0.2% 3 11.5% 547 13369.4 28414.5
EXPLODE MAJOR 11 0.1% 2 18.2% 741 19144.8 55444.1
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 858 6.9% 114 13.3% 17 115.0 351.8
LANGUAGE 214 1.7% 12 5.6% 63 454.2 0.0
PUB TYPE 245 2.0% 11 4.5% 47 285.7 847.6
Other indexes 218 1.8% 16 7.3% 1 21.1 91.9
By number of indexes:
Multiple 3,704 33.1% 780 21.1% 11 405.2 4751.0
Single 7,489 66.9% 1,608 21.5% 32 1699.9 14665.0
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 6 2.4% 1 16.7% 1 1.6 1.3
JOURNAL 34 13.9% 3 8.8% 1 2.6 4.3
EXACT JOURNAL 1 0.4% 0 0.0% 1 1.0 0.0
SUBJECT 190 77.6% 38 20.0% 2 13.8 75.8
EXACT SUBJECT 14 5.7% 0 0.0% 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 245 100% 42 17.1% 2 10.9 65.7
LIMITS:
Number of times limits (bit strings) used: 722
Use by bit string (percentage):
Current year minus 5 27.3%
Current year minus 4 0.0%
Current year minus 3 0.4%
Current year minus 2 0.3%
Current year minus 1 0.6%
Current year 0.7%
English Language 29.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 1.5%
XS Adult 0.0%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.1%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.6%
XS Human 11.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.3%
XS Middle Age 1.1%
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 20.8%
PT Journal Article 1.0%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,325
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.1%
Percentage of ORs 3.1%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
BRIEF 61.6%
LONG 1.1%
MEDLINE 1.2%
FIELDS 5.3%
PERIODICALS 0.0%
BROWSE REVIEW 1.4%
BROWSE LONG 0.8%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 25.1%
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 37.8%
2. First word of command is invalid 24.2%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.9%
5. 1185 2.6%
6. NS of SHOW/EXP command-no next screen 2.5%
7. PS command - no previous screen 2.0%
8. Search term missing from search command 1.9%
9. Valid command at an inappropriate time 1.7%
10. Command containing escape or arrow key 1.7%
11. All others 15.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 19.4%
2. LOCATE (article dbs w/o monographs) 12.9%
3. COMMANDS 9.4%
4. Unrecognized term 8.2%
5. MEDLINE BACKFILES 7.6%
6. FIND 7.1%
7. INDEXES 4.7%
8. ADD-ON SEARCH 4.1%
9. 3304 2.9%
10. 1575 2.4%
11. All others 31.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.2%
2. First word of command is invalid 13.7%
3. DISPLAY command-first of >1 screen 6.3%
4. FIND command with invalid index name 6.0%
5. NS of SHOW/EXP command-no next screen 4.6%
6. Add-on without index name 3.4%
7. DISPLAY command - middle of >1 screen 3.4%
8. FIND command retrieves >1 book 3.1%
9. NS command - no next screen 2.9%
10. FIND command with zero results 2.9%
11. All others 21.2%
Ten most frequent SHOW requests:
1. HISTORY 47.7%
2. SEARCH 35.5%
3. SETTINGS 3.7%
4. MEDLINE NEWS 3.7%
5. MAIL STATUS 3.7%
6. UPDATE 2.8%
7. MEDLINE GLOSSARY 1.9%
8. MAIL SETTINGS 0.9%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)