MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/14/01 through 07/20/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 50 483 533
Davis 38 433 45 516
Irvine 0 342 0 342
Los Angeles 0 17 79 96
Riverside 0 8 84 92
San Diego 75 412 37 524
San Francisco 66 0 1,321 1,387
Santa Barbara 0 5 17 22
Santa Cruz 1 0 97 98
Stanford 221
Other (including DLA) 0 0 1,827 1,827
_______________ _________ _________ _________
Total: 180 1,267 3,990 5,658
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,106 12,916 335,688
MED90 database 692 1,566 10,178
MED85 database 368 765 5,435
MED80 database 227 402 2,081
MED75 database 132 289 1,794
MED66 database 133 271 1,168
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 60 224 3,343
2-4 a.m. 25 67 577
4-6 a.m. 48 128 1,744
6-8 a.m. 144 443 7,396
8-10 a.m. 656 1,794 12,569
10-12 a.m. 1,140 3,195 26,723
12-2 p.m. 1,020 2,643 28,262
2-4 p.m. 1,085 3,324 118,300
4-6 p.m. 863 2,488 107,985
6-8 p.m. 319 921 31,087
8-10 p.m. 183 574 5,729
10-12 p.m. 115 408 12,629
__________ __________ __________ _________________
Total: 5,658 16,209 356,344
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 19:10 14:14 20:58 14:49
Median 11:15 9:10 14:29 9:54
Total:
Average 19:10 14:14 20:58 14:49
Median 11:15 9:10 14:29 9:54
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.9
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 5,658 100%
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 2.9
Retrievals per search - average 1038.4
Retrievals per search - median 9.0
Retrievals per search - standard deviation 11185.4
Percent of searches completed with 0 results 20.1%
Percent of searches entered that are long 0.4%
Percent of long searches completed 70.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,824 25.7%
DISPLAY (excluding automatic displays) 15,632 33.9%
BROWSE 556 1.2%
SELECT 144 0.3%
HELP 207 0.4%
EXPLAIN 193 0.4%
SAVE 2,716 5.9%
SET/RESET 2,767 6.0%
SHOW 166 0.4%
ADD-ON (AND, OR, AND NOT) 3,594 7.8%
LOGON or LOGOFF 6,099 13.2%
COMMENT 0 0.0%
OTHER 2,170 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 5,048 29.7% 1,006 19.9% 13 121.5 1421.3
TITLE WORD 2,254 13.3% 816 36.2% 5 695.5 13214.9
EXACT TITLE 126 0.7% 61 48.4% 1 21.7 89.4
JOURNAL 905 5.3% 230 25.4% 315 2667.2 8022.6
EXACT JOURNAL 270 1.6% 66 24.4% 645 2239.1 3996.9
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 5,561 32.7% 1,004 18.1% 31 2271.0 20162.6
SUBJECT WORD 32 0.2% 9 28.1% 9 975.6 1778.7
SUBJECT 483 2.8% 123 25.5% 278 8373.8 44659.9
MAJOR SUBJECT 44 0.3% 4 9.1% 235 2211.5 5599.7
EXACT SUBJECT 273 1.6% 50 18.3% 49 1696.0 7361.1
MAJOR XS 50 0.3% 10 20.0% 802 2080.4 2951.5
EXPLODE XS 68 0.4% 10 14.7% 261 4662.3 11828.1
EXPLODE MAJOR 19 0.1% 2 10.5% 2,811 9150.0 23935.4
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 897 5.3% 115 12.8% 19 162.7 864.4
LANGUAGE 407 2.4% 11 2.7% 80 740.6 0.0
PUB TYPE 551 3.2% 15 2.7% 30 251.6 1065.3
Other indexes 283 1.7% 30 10.6% 1 20.8 124.4
By number of indexes:
Multiple 5,217 33.9% 1,035 19.8% 13 752.6 13305.8
Single 10,167 66.1% 2,104 20.7% 33 1683.5 12576.4
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 5 0.9% 5 100% 0 0.0 0.0
JOURNAL 34 6.2% 6 17.6% 7 5.3 3.7
EXACT JOURNAL 16 2.9% 0 0.0% 1 6.6 11.0
SUBJECT 480 87.1% 110 22.9% 2 17.4 135.6
EXACT SUBJECT 16 2.9% 4 25.0% 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 551 100% 125 22.7% 2 15.7 126.4
LIMITS:
Number of times limits (bit strings) used: 1,177
Use by bit string (percentage):
Current year minus 5 22.6%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.3%
Current year minus 1 0.3%
Current year 0.2%
English Language 35.5%
French Language 0.0%
Japanese Language 0.1%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 1.3%
XS Adult 0.1%
XS Aged 0.0%
XS Animal 0.6%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.4%
XS Human 8.2%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 1.4%
XS Rats 3.4%
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 21.2%
PT Journal Article 0.1%
SUBSET AIM 2.9%
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: 5,952
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.6%
Percentage of ORs 3.9%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
BRIEF 62.3%
LONG 1.0%
MEDLINE 1.1%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 2.1%
BROWSE LONG 1.0%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.4%
Other 25.6%
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 42.0%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.9%
5. Add-on search with invalid index name 1.8%
6. PS command - no previous screen 1.7%
7. Search term missing from search command 1.5%
8. NS of SHOW/EXP command-no next screen 1.2%
9. Valid command at an inappropriate time 1.1%
10. DISPLAY command - no FIND results 1.0%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 24.4%
2. Unrecognized term 8.3%
3. LOCATE (article dbs w/o monographs) 7.3%
4. FIND 7.3%
5. MEDLINE BACKFILES 6.2%
6. DATABASES 4.7%
7. ADD-ON SEARCH 3.6%
8. COMMANDS 3.6%
9. PUBLICATION TYPES 3.1%
10. MAIL 2.1%
11. All others 25.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 28.5%
2. First word of command is invalid 14.0%
3. DISPLAY command-first of >1 screen 5.8%
4. FIND command with invalid index name 5.0%
5. DISPLAY command - last of >1 screen 5.0%
6. DISPLAY command - middle of >1 screen 3.8%
7. NS command - no next screen 3.5%
8. FIND command retrieves >1 book 3.5%
9. NS of SHOW/EXP command-no next screen 3.3%
10. PA command modified to Medline format 2.8%
11. All others 29.5%
Ten most frequent SHOW requests:
1. HISTORY 82.5%
2. SEARCH 4.4%
3. MAIL SETTINGS 3.5%
4. PUBLICATION TYPES 1.8%
5. MAIL STATUS 1.8%
6. TIMEOUT SETTING 0.9%
7. DISPLAY 0.9%
8. SETTINGS 0.9%
9. MEDLINE STATISTICS 0.9%
10. MEDLINE NEWS 0.9%
11. All others 1.8%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)