MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/25/01 through 08/31/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 43 447 490
Davis 15 411 82 508
Irvine 0 374 0 374
Los Angeles 0 5 83 88
Riverside 0 4 54 58
San Diego 98 432 27 557
San Francisco 58 0 1,049 1,107
Santa Barbara 0 7 12 19
Santa Cruz 0 6 35 41
Stanford 230
Other (including DLA) 0 0 1,913 1,913
_______________ _________ _________ _________
Total: 171 1,282 3,702 5,385
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,901 12,087 120,297
MED90 database 652 1,459 7,927
MED85 database 348 663 3,081
MED80 database 251 463 2,430
MED75 database 134 295 1,805
MED66 database 99 264 1,332
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 34 105 2,040
2-4 a.m. 26 76 545
4-6 a.m. 41 74 790
6-8 a.m. 113 256 2,094
8-10 a.m. 745 2,041 20,970
10-12 a.m. 1,058 2,847 20,991
12-2 p.m. 963 2,772 26,285
2-4 p.m. 1,129 3,243 26,778
4-6 p.m. 742 2,325 22,235
6-8 p.m. 231 798 8,181
8-10 p.m. 169 368 3,331
10-12 p.m. 134 326 2,632
__________ __________ __________ _________________
Total: 5,385 15,231 136,872
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 19:42 14:15 18:26 14:32
Median 11:29 8:53 13:29 9:21
Total:
Average 19:42 14:15 18:26 14:32
Median 11:29 8:53 13:29 9:21
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 0.4
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 5,385 100%
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 1053.1
Retrievals per search - median 8.0
Retrievals per search - standard deviation 12162.5
Percent of searches completed with 0 results 21.5%
Percent of searches entered that are long 0.4%
Percent of long searches completed 66.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,224 25.5%
DISPLAY (excluding automatic displays) 15,364 34.9%
BROWSE 283 0.6%
SELECT 79 0.2%
HELP 182 0.4%
EXPLAIN 205 0.5%
SAVE 2,718 6.2%
SET/RESET 2,764 6.3%
SHOW 188 0.4%
ADD-ON (AND, OR, AND NOT) 3,368 7.7%
LOGON or LOGOFF 5,695 12.9%
COMMENT 0 0.0%
OTHER 1,908 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 5,003 30.6% 1,042 20.8% 12 125.0 732.1
TITLE WORD 2,208 13.5% 801 36.3% 6 550.8 4946.6
EXACT TITLE 237 1.4% 97 40.9% 1 14.3 66.3
JOURNAL 835 5.1% 253 30.3% 91 1792.8 5738.1
EXACT JOURNAL 321 2.0% 126 39.3% 457 2462.3 4517.6
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 5,070 31.0% 932 18.4% 30 1770.6 16490.8
SUBJECT WORD 27 0.2% 19 70.4% 116 41064.3 115484
SUBJECT 409 2.5% 111 27.1% 135 4055.9 36913.5
MAJOR SUBJECT 48 0.3% 6 12.5% 203 4130.0 16767.6
EXACT SUBJECT 265 1.6% 41 15.5% 87 2977.2 12420.3
MAJOR XS 24 0.1% 1 4.2% 134 266.2 325.0
EXPLODE XS 112 0.7% 17 15.2% 478 39941.8 88329.4
EXPLODE MAJOR 4 0.0% 0 0.0% 23,798 23902.5 7615.6
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 1,098 6.7% 145 13.2% 15 146.9 653.3
LANGUAGE 340 2.1% 14 4.1% 77 499.6 0.0
PUB TYPE 283 1.7% 2 0.7% 39 340.2 1351.1
Other indexes 177 1.1% 35 19.8% 1 24.9 256.7
By number of indexes:
Multiple 5,238 36.0% 1,143 21.8% 11 946.3 13615.0
Single 9,312 64.0% 2,009 21.6% 31 1654.3 14239.7
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 2.1% 0 0.0% 1 1.7 1.2
JOURNAL 46 16.3% 12 26.1% 3 7.0 14.5
EXACT JOURNAL 11 3.9% 0 0.0% 4 3.4 2.2
SUBJECT 214 75.6% 40 18.7% 2 27.1 171.3
EXACT SUBJECT 6 2.1% 2 33.3% 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 283 100% 54 19.1% 2 21.8 149.6
LIMITS:
Number of times limits (bit strings) used: 1,056
Use by bit string (percentage):
Current year minus 5 31.4%
Current year minus 4 0.0%
Current year minus 3 1.1%
Current year minus 2 0.2%
Current year minus 1 0.1%
Current year 0.4%
English Language 32.9%
French Language 0.2%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.3%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 12.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.5%
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 16.5%
PT Journal Article 0.3%
SUBSET AIM 1.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 5,976
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.4%
Percentage of ORs 5.0%
Percentage of AND NOTs 1.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
BRIEF 63.8%
LONG 0.6%
MEDLINE 0.6%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 25.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 41.3%
2. First word of command is invalid 25.3%
3. FIND command with invalid index name 7.2%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 1.7%
6. Search term missing from search command 1.5%
7. Valid command at an inappropriate time 1.4%
8. DISPLAY command - no FIND results 1.3%
9. Add-on search with invalid index name 1.3%
10. Command containing escape or arrow key 1.0%
11. All others 13.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 19.0%
2. BOOKS DATABASE 12.2%
3. MEDLINE BACKFILES 12.2%
4. FIND 8.3%
5. INDEXES 6.8%
6. Unrecognized term 3.9%
7. ADD-ON SEARCH 3.4%
8. COMMANDS 3.4%
9. MAIL 2.4%
10. DATABASES 2.4%
11. All others 30.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 17.3%
2. First word of command is invalid 12.9%
3. FIND command with invalid index name 9.0%
4. DISPLAY command - middle of >1 screen 7.8%
5. DISPLAY command-first of >1 screen 7.2%
6. DISPLAY command - last of >1 screen 4.7%
7. NS command - no next screen 3.4%
8. FIND command with zero results 2.8%
9. Add-on without index name 2.6%
10. FIND command retrieves >1 book 2.1%
11. All others 25.9%
Ten most frequent SHOW requests:
1. HISTORY 76.0%
2. MAIL STATUS 12.5%
3. SEARCH 7.7%
4. 0241 1.0%
5. SUBSETS 1.0%
6. SETTINGS 1.0%
7. MEDLINE NEWS 1.0%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)