MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/26/01 through 06/01/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 46 318 364
Davis 25 840 76 941
Irvine 0 344 0 344
Los Angeles 0 17 123 140
Riverside 0 4 39 43
San Diego 128 426 24 578
San Francisco 80 0 1,011 1,091
Santa Barbara 0 5 18 23
Santa Cruz 8 3 48 59
Stanford 255
Other (including DLA) 0 0 1,774 1,774
_______________ _________ _________ _________
Total: 241 1,685 3,431 5,612
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,025 13,806 159,951
MED90 database 688 1,447 8,715
MED85 database 380 747 3,119
MED80 database 243 432 2,329
MED75 database 148 255 1,571
MED66 database 128 270 1,441
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 68 242 2,648
2-4 a.m. 43 124 1,362
4-6 a.m. 71 132 1,045
6-8 a.m. 185 431 4,168
8-10 a.m. 595 2,095 17,451
10-12 a.m. 1,045 3,255 32,099
12-2 p.m. 1,011 2,894 26,919
2-4 p.m. 1,080 3,041 34,980
4-6 p.m. 754 2,325 26,071
6-8 p.m. 409 1,259 13,157
8-10 p.m. 226 792 7,437
10-12 p.m. 125 367 9,789
__________ __________ __________ _________________
Total: 5,612 16,957 177,126
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 16:17 14:39 19:56 15:03
Median 11:18 8:17 13:40 8:57
Total:
Average 16:17 14:39 19:56 15:03
Median 11:18 8:17 13:40 8:57
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.6
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 5,612 100%
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 1134.8
Retrievals per search - median 9.0
Retrievals per search - standard deviation 11338.7
Percent of searches completed with 0 results 21.0%
Percent of searches entered that are long 0.3%
Percent of long searches completed 64.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 12,825 25.5%
DISPLAY (excluding automatic displays) 18,336 36.5%
BROWSE 185 0.4%
SELECT 75 0.1%
HELP 224 0.4%
EXPLAIN 203 0.4%
SAVE 3,357 6.7%
SET/RESET 2,744 5.5%
SHOW 269 0.5%
ADD-ON (AND, OR, AND NOT) 3,537 7.0%
LOGON or LOGOFF 6,137 12.2%
COMMENT 1 0.0%
OTHER 2,374 4.7%
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 5,817 32.3% 1,324 22.8% 13 133.6 908.1
TITLE WORD 2,200 12.2% 682 31.0% 8 601.5 3903.2
EXACT TITLE 125 0.7% 60 48.0% 1 35.1 184.1
JOURNAL 966 5.4% 282 29.2% 202 3621.7 10990.1
EXACT JOURNAL 238 1.3% 74 31.1% 56 1943.0 4480.9
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 6,314 35.1% 1,157 18.3% 30 1781.2 15089.7
SUBJECT WORD 13 0.1% 3 23.1% 223 110187 179150
SUBJECT 326 1.8% 102 31.3% 137 6941.8 34840.2
MAJOR SUBJECT 43 0.2% 1 2.3% 130 1107.8 2452.5
EXACT SUBJECT 147 0.8% 23 15.6% 112 1822.9 4108.1
MAJOR XS 16 0.1% 4 25.0% 706 1837.3 2536.0
EXPLODE XS 92 0.5% 21 22.8% 1,347 10972.2 26498.9
EXPLODE MAJOR 12 0.1% 1 8.3% 21,750 32118.1 40751.6
TREE NUMBER 2 0.0% 0 0.0% 11,108 11107.5 14521.9
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 876 4.9% 154 17.6% 10 115.3 464.1
LANGUAGE 351 2.0% 9 2.6% 140 1392.1 0.0
PUB TYPE 184 1.0% 17 9.2% 29 558.3 4753.4
Other indexes 146 0.8% 16 11.0% 1 2.4 6.4
By number of indexes:
Multiple 5,370 32.9% 1,172 21.8% 13 1017.1 13182.0
Single 10,953 67.1% 2,300 21.0% 30 1723.1 12888.7
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 14 7.6% 3 21.4% 10 28.5 69.7
JOURNAL 24 13.0% 11 45.8% 1 1.5 0.9
EXACT JOURNAL 17 9.2% 3 17.6% 2 3.6 4.2
SUBJECT 123 66.8% 18 14.6% 3 26.5 198.6
EXACT SUBJECT 6 3.3% 1 16.7% 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 184 100% 36 19.6% 2 21.4 168.3
LIMITS:
Number of times limits (bit strings) used: 1,067
Use by bit string (percentage):
Current year minus 5 26.4%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.8%
Current year minus 1 0.3%
Current year 0.7%
English Language 34.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 1.3%
XS Adolescence 0.0%
XS Adult 0.3%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.1%
XS Child 0.0%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 1.1%
XS Human 6.3%
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 25.0%
PT Journal Article 0.1%
SUBSET AIM 0.7%
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: 6,137
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.3%
Percentage of ORs 4.8%
Percentage of AND NOTs 2.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
BRIEF 61.8%
LONG 0.6%
MEDLINE 2.3%
FIELDS 4.7%
PERIODICALS 0.0%
BROWSE REVIEW 0.7%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 42.8%
2. First word of command is invalid 24.2%
3. FIND command with invalid index name 6.0%
4. DISPLAY command contains invalid word 4.3%
5. Add-on search with invalid index name 2.0%
6. Search term missing from search command 1.4%
7. PS command - no previous screen 1.4%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command - no FIND results 1.1%
10. Command containing escape or arrow key 1.0%
11. All others 14.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.3%
2. FIND 13.3%
3. MEDLINE BACKFILES 8.4%
4. Unrecognized term 7.9%
5. LOCATE (article dbs w/o monographs) 6.4%
6. INDEXES 5.4%
7. DATABASES 4.9%
8. COMMANDS 4.4%
9. MAIL 3.0%
10. A059 2.5%
11. All others 27.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.4%
2. First word of command is invalid 14.5%
3. FIND command with invalid index name 7.3%
4. DISPLAY command-first of >1 screen 5.6%
5. DISPLAY command - middle of >1 screen 4.9%
6. DISPLAY command - last of >1 screen 4.4%
7. NS of SHOW/EXP command-no next screen 4.2%
8. FIND command with zero results 2.8%
9. Multi-index search with zero results 2.8%
10. 848 2.8%
11. All others 30.5%
Ten most frequent SHOW requests:
1. HISTORY 76.0%
2. SEARCH 12.5%
3. MAIL STATUS 8.3%
4. SETTINGS 3.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)