MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/17/01 through 11/23/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 51 313 364
Davis 8 316 68 392
Irvine 0 139 0 139
Los Angeles 0 21 30 51
Riverside 0 0 19 19
San Diego 5 237 14 256
San Francisco 31 0 613 644
Santa Barbara 0 1 20 21
Santa Cruz 0 2 21 23
Stanford 46
Other (including DLA) 0 0 1,034 1,034
_______________ _________ _________ _________
Total: 44 767 2,132 2,989
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 2,168 6,772 80,481
MED90 database 306 609 4,124
MED85 database 190 380 2,206
MED80 database 164 369 2,254
MED75 database 86 174 1,660
MED66 database 75 166 1,452
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 74 726
2-4 a.m. 27 83 686
4-6 a.m. 22 47 338
6-8 a.m. 74 167 1,600
8-10 a.m. 356 1,122 11,959
10-12 a.m. 544 1,441 16,540
12-2 p.m. 523 1,473 15,706
2-4 p.m. 608 1,716 17,405
4-6 p.m. 498 1,370 16,923
6-8 p.m. 178 487 4,738
8-10 p.m. 92 308 3,712
10-12 p.m. 44 182 1,844
__________ __________ __________ _________________
Total: 2,989 8,470 92,177
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 19:08 16:35 14:42 15:59
Median 9:18 10:09 9:36 9:52
Total:
Average 19:08 16:35 14:42 15:59
Median 9:18 10:09 9:36 9:52
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.3
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 2,989 100%
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 1009.3
Retrievals per search - median 11.0
Retrievals per search - standard deviation 11903.8
Percent of searches completed with 0 results 20.3%
Percent of searches entered that are long 0.4%
Percent of long searches completed 41.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 6,235 25.5%
DISPLAY (excluding automatic displays) 8,531 34.9%
BROWSE 128 0.5%
SELECT 40 0.2%
HELP 156 0.6%
EXPLAIN 148 0.6%
SAVE 1,517 6.2%
SET/RESET 1,527 6.2%
SHOW 85 0.3%
ADD-ON (AND, OR, AND NOT) 1,873 7.7%
LOGON or LOGOFF 3,174 13.0%
COMMENT 0 0.0%
OTHER 1,049 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 2,495 28.5% 484 19.4% 13 130.9 623.4
TITLE WORD 1,210 13.8% 373 30.8% 10 668.1 4536.0
EXACT TITLE 64 0.7% 26 40.6% 1 8.7 28.6
JOURNAL 464 5.3% 122 26.3% 388 2450.3 7713.7
EXACT JOURNAL 136 1.6% 50 36.8% 1,277 2872.9 4177.2
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 3,181 36.4% 581 18.3% 37 2099.9 20601.9
SUBJECT WORD 7 0.1% 4 57.1% 702 510.0 436.9
SUBJECT 207 2.4% 70 33.8% 547 3564.6 12188.0
MAJOR SUBJECT 23 0.3% 2 8.7% 2,353 2599.3 2478.7
EXACT SUBJECT 113 1.3% 33 29.2% 199 1511.5 3043.8
MAJOR XS 4 0.0% 0 0.0% 121 172.8 190.3
EXPLODE XS 32 0.4% 9 28.1% 247 7064.8 17939.3
EXPLODE MAJOR 7 0.1% 0 0.0% 43 902.6 1431.6
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 464 5.3% 61 13.1% 18 584.4 5124.4
LANGUAGE 126 1.4% 1 0.8% 120 733.4 0.0
PUB TYPE 127 1.5% 6 4.7% 116 1494.4 7211.9
Other indexes 112 1.3% 14 12.5% 1 9.6 46.5
By number of indexes:
Multiple 2,546 31.5% 532 20.9% 13 352.5 2675.6
Single 5,528 68.5% 1,133 20.5% 35 1770.0 16355.2
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 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 16 12.6% 5 31.3% 2 49.4 150.3
EXACT JOURNAL 2 1.6% 0 0.0% 2 2.0 1.4
SUBJECT 106 83.5% 33 31.1% 1 3.5 10.7
EXACT SUBJECT 3 2.4% 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 127 100% 38 29.9% 1 9.1 53.8
LIMITS:
Number of times limits (bit strings) used: 475
Use by bit string (percentage):
Current year minus 5 34.1%
Current year minus 4 0.0%
Current year minus 3 0.2%
Current year minus 2 0.0%
Current year minus 1 0.0%
Current year 0.6%
English Language 27.8%
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 0.0%
XS Aged 0.6%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 11.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.7%
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 19.8%
PT Journal Article 0.2%
SUBSET AIM 1.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.4%
SUBSET Dental journals 0.2%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 3,008
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 89.4%
Percentage of ORs 4.8%
Percentage of AND NOTs 5.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
BRIEF 63.3%
LONG 1.6%
MEDLINE 0.4%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 40.1%
2. First word of command is invalid 23.6%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 3.9%
5. 1185 2.4%
6. Search term missing from search command 2.2%
7. DISPLAY command - no FIND results 1.9%
8. PS command - no previous screen 1.8%
9. Add-on search with invalid index name 1.6%
10. Valid command at an inappropriate time 1.3%
11. All others 14.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 17.6%
2. BOOKS DATABASE 17.6%
3. FIND 8.8%
4. MEDLINE BACKFILES 6.1%
5. ADD-ON SEARCH 4.7%
6. COMMANDS 4.7%
7. Unrecognized term 4.1%
8. INDEXES 4.1%
9. DATABASES 3.4%
10. 1752 3.4%
11. All others 25.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.1%
2. First word of command is invalid 14.5%
3. FIND command with invalid index name 7.6%
4. DISPLAY command-first of >1 screen 6.9%
5. FIND command retrieves >1 book 6.6%
6. NS command - no next screen 4.9%
7. DISPLAY command - middle of >1 screen 4.9%
8. 848 3.3%
9. NS of SHOW/EXP command-no next screen 3.0%
10. DISPLAY command-complete in one screen 2.3%
11. All others 25.7%
Ten most frequent SHOW requests:
1. HISTORY 52.1%
2. SETTINGS 21.1%
3. SEARCH 18.3%
4. MEDLINE NEWS 5.6%
5. LOCATION 1.4%
6. MAIL STATUS 1.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)