MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/18/01 through 08/24/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 49 358 407
Davis 31 336 66 433
Irvine 0 273 0 273
Los Angeles 0 1 84 85
Riverside 0 5 38 43
San Diego 96 323 32 451
San Francisco 66 0 1,035 1,101
Santa Barbara 0 3 21 24
Santa Cruz 1 3 39 43
Stanford 205
Other (including DLA) 0 0 1,738 1,738
_______________ _________ _________ _________
Total: 194 993 3,411 4,803
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,431 11,482 134,394
MED90 database 594 1,291 7,215
MED85 database 336 697 3,695
MED80 database 203 432 2,915
MED75 database 122 233 1,271
MED66 database 117 269 11,444
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 69 207 1,730
2-4 a.m. 27 60 1,517
4-6 a.m. 35 54 453
6-8 a.m. 105 291 22,643
8-10 a.m. 647 1,816 10,847
10-12 a.m. 925 2,670 25,286
12-2 p.m. 869 2,632 27,331
2-4 p.m. 985 3,102 35,327
4-6 p.m. 705 2,005 19,461
6-8 p.m. 277 981 9,019
8-10 p.m. 87 320 4,228
10-12 p.m. 72 266 3,092
__________ __________ __________ _________________
Total: 4,803 14,404 160,934
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 19:51 14:02 18:15 15:24
Median 12:18 8:53 14:48 10:05
Total:
Average 19:51 14:02 18:15 15:24
Median 12:18 8:53 14:48 10:05
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 3.1
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 4,803 100%
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 946.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7128.2
Percent of searches completed with 0 results 21.2%
Percent of searches entered that are long 0.5%
Percent of long searches completed 70.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 10,479 26.1%
DISPLAY (excluding automatic displays) 14,210 35.4%
BROWSE 290 0.7%
SELECT 82 0.2%
HELP 177 0.4%
EXPLAIN 121 0.3%
SAVE 2,155 5.4%
SET/RESET 2,438 6.1%
SHOW 124 0.3%
ADD-ON (AND, OR, AND NOT) 3,223 8.0%
LOGON or LOGOFF 5,103 12.7%
COMMENT 0 0.0%
OTHER 1,785 4.4%
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 4,486 29.3% 918 20.5% 13 142.7 759.2
TITLE WORD 2,255 14.7% 797 35.3% 6 397.7 2520.8
EXACT TITLE 131 0.9% 58 44.3% 1 12.0 38.9
JOURNAL 859 5.6% 225 26.2% 191 3703.7 10864.0
EXACT JOURNAL 320 2.1% 84 26.2% 473 2217.9 4667.5
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 4,821 31.5% 929 19.3% 26 1802.0 11488.9
SUBJECT WORD 6 0.0% 4 66.7% 312 312.0 342.2
SUBJECT 405 2.6% 108 26.7% 92 2406.6 8444.4
MAJOR SUBJECT 43 0.3% 4 9.3% 313 4770.8 8976.9
EXACT SUBJECT 164 1.1% 32 19.5% 57 911.1 3306.2
MAJOR XS 23 0.2% 1 4.3% 1,965 4006.8 5743.6
EXPLODE XS 74 0.5% 14 18.9% 573 17523.5 27063.9
EXPLODE MAJOR 16 0.1% 1 6.3% 543 3829.1 5666.2
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 898 5.9% 127 14.1% 13 136.9 495.7
LANGUAGE 349 2.3% 14 4.0% 75 1193.8 0.0
PUB TYPE 288 1.9% 12 4.2% 33 895.8 9163.8
Other indexes 235 1.5% 52 22.1% 1 13.6 93.3
By number of indexes:
Multiple 4,873 35.7% 1,018 20.9% 11 757.2 5600.7
Single 8,789 64.3% 1,930 22.0% 30 1551.3 9376.9
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 10 3.5% 1 10.0% 2 6.8 11.3
JOURNAL 44 15.3% 8 18.2% 2 11.5 22.2
EXACT JOURNAL 7 2.4% 1 14.3% 1 2.2 2.9
SUBJECT 223 77.4% 41 18.4% 2 30.5 203.4
EXACT SUBJECT 4 1.4% 2 50.0% 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 288 100% 53 18.4% 2 25.7 179.3
LIMITS:
Number of times limits (bit strings) used: 1,025
Use by bit string (percentage):
Current year minus 5 26.1%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.4%
Current year minus 1 0.5%
Current year 0.6%
English Language 35.7%
French Language 0.2%
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 0.5%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 10.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.6%
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 19.0%
PT Journal Article 0.4%
SUBSET AIM 2.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 5,551
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.5%
Percentage of ORs 3.9%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
BRIEF 60.2%
LONG 1.0%
MEDLINE 0.8%
FIELDS 5.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.5%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.3%
Other 27.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.6%
Ten most frequent errors:
1. NS command - no next screen 40.1%
2. First word of command is invalid 23.7%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 5.2%
5. Search term missing from search command 2.0%
6. PS command - no previous screen 1.9%
7. Add-on search with invalid index name 1.9%
8. DISPLAY command-record numbers too large 1.4%
9. DISPLAY command - no FIND results 1.3%
10. Valid command at an inappropriate time 1.3%
11. All others 14.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.4%
2. FIND 12.4%
3. MEDLINE BACKFILES 9.1%
4. Unrecognized term 7.4%
5. COMMANDS 6.6%
6. LOCATE (article dbs w/o monographs) 5.0%
7. DATABASES 5.0%
8. MAIL 4.1%
9. DISPLAY 4.1%
10. INDEXES 4.1%
11. All others 24.8%
Ten most frequent HELP situations:
1. First word of command is invalid 19.1%
2. Command mode selected from Welcome 18.5%
3. FIND command with invalid index name 10.4%
4. DISPLAY command-first of >1 screen 7.7%
5. DISPLAY command - middle of >1 screen 5.7%
6. NS command - no next screen 3.7%
7. FIND command retrieves >1 book 3.4%
8. Valid command at an inappropriate time 2.3%
9. PS command - no previous screen 2.3%
10. DISPLAY command-complete in one screen 2.0%
11. All others 29.8%
Ten most frequent SHOW requests:
1. HISTORY 72.3%
2. SEARCH 6.4%
3. MAIL STATUS 5.3%
4. UPDATE 5.3%
5. SETTINGS 3.2%
6. MEDLINE GLOSSARY 3.2%
7. UCSF PASSWORDS 1.1%
8. 0800 1.1%
9. MEDLINE LOADING STATISTICS 1.1%
10. CC LOADING STATISTICS 1.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)