MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/09/00 through 09/15/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 223 715 938
Davis 47 793 163 1,003
Irvine 0 527 0 527
Los Angeles 0 433 289 722
Riverside 0 25 69 94
San Diego 97 566 69 732
San Francisco 148 0 1,594 1,742
Santa Barbara 0 25 31 56
Santa Cruz 22 6 75 103
Stanford 310
Other (including DLA) 0 0 2,305 2,305
_______________ _________ _________ _________
Total: 314 2,598 5,310 8,532
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,980 19,294 222,947
MED90 database 1,109 2,354 20,875
MED85 database 617 1,228 7,387
MED80 database 406 801 4,152
MED75 database 244 497 3,954
MED66 database 176 430 4,740
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 75 190 2,385
2-4 a.m. 38 94 950
4-6 a.m. 41 78 864
6-8 a.m. 194 436 7,440
8-10 a.m. 915 2,609 18,838
10-12 a.m. 1,669 4,689 37,803
12-2 p.m. 1,562 4,454 51,315
2-4 p.m. 1,783 4,958 52,682
4-6 p.m. 1,218 3,782 53,048
6-8 p.m. 553 1,632 16,546
8-10 p.m. 301 949 13,104
10-12 p.m. 183 733 9,080
__________ __________ __________ _________________
Total: 8,532 24,604 264,055
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 16:54 14:12 14:23 14:27
Median 10:37 8:31 11:41 9:10
Total:
Average 16:54 14:12 14:23 14:27
Median 10:37 8:31 11:41 9:10
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 5.1
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 8,532 100%
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 791.2
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8801.9
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.3%
Percent of long searches completed 58.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,879 25.0%
DISPLAY (excluding automatic displays) 27,374 36.2%
BROWSE 398 0.5%
SELECT 181 0.2%
HELP 523 0.7%
EXPLAIN 467 0.6%
SAVE 5,431 7.2%
SET/RESET 4,077 5.4%
SHOW 382 0.5%
ADD-ON (AND, OR, AND NOT) 4,738 6.3%
LOGON or LOGOFF 9,447 12.5%
COMMENT 0 0.0%
OTHER 3,629 4.8%
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 7,900 30.0% 1,553 19.7% 12 113.8 684.3
TITLE WORD 3,148 11.9% 987 31.4% 6 352.1 2482.0
EXACT TITLE 216 0.8% 87 40.3% 1 9.5 54.0
JOURNAL 1,218 4.6% 370 30.4% 175 2035.3 5210.5
EXACT JOURNAL 352 1.3% 112 31.8% 406 1936.9 3915.8
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 9,069 34.4% 1,725 19.0% 29 1543.5 14998.8
SUBJECT WORD 25 0.1% 8 32.0% 276 382.8 558.3
SUBJECT 736 2.8% 259 35.2% 182 5276.0 15917.5
MAJOR SUBJECT 62 0.2% 18 29.0% 389 2580.9 5400.9
EXACT SUBJECT 391 1.5% 72 18.4% 101 1148.9 3449.4
MAJOR XS 53 0.2% 12 22.6% 284 913.7 1212.5
EXPLODE XS 152 0.6% 23 15.1% 88 2745.1 7846.5
EXPLODE MAJOR 57 0.2% 4 7.0% 2,675 12917.3 27283.0
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 1,289 4.9% 178 13.8% 9 123.8 399.9
LANGUAGE 628 2.4% 20 3.2% 79 881.5 0.0
PUB TYPE 394 1.5% 39 9.9% 34 191.5 604.6
Other indexes 520 2.0% 80 15.4% 1 22.5 212.8
By number of indexes:
Multiple 7,473 31.7% 1,564 20.9% 11 495.9 4931.6
Single 16,086 68.3% 3,322 20.6% 27 1281.0 11691.1
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 3.6% 1 7.1% 24 86.4 117.3
JOURNAL 85 21.6% 16 18.8% 1 7.7 22.2
EXACT JOURNAL 19 4.8% 2 10.5% 1 7.2 12.3
SUBJECT 251 63.7% 45 17.9% 5 53.8 565.4
EXACT SUBJECT 25 6.3% 5 20.0% 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 394 100% 69 17.5% 4 39.6 451.1
LIMITS:
Number of times limits (bit strings) used: 1,644
Use by bit string (percentage):
Current year minus 5 15.2%
Current year minus 4 0.0%
Current year minus 3 1.8%
Current year minus 2 0.3%
Current year minus 1 0.5%
Current year 0.2%
English Language 41.9%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.1%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 10.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.4%
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 25.3%
PT Journal Article 0.5%
SUBSET AIM 1.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 8,579
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.2%
Percentage of ORs 3.2%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 65.1%
LONG 1.0%
MEDLINE 0.7%
FIELDS 3.2%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.6%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.9%
Ten most frequent errors:
1. NS command - no next screen 39.5%
2. First word of command is invalid 25.5%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 4.1%
5. Valid command at an inappropriate time 1.7%
6. Search term missing from search command 1.7%
7. PS command - no previous screen 1.6%
8. Add-on search with invalid index name 1.6%
9. Command containing escape or arrow key 1.3%
10. NS of SHOW/EXP command-no next screen 1.1%
11. All others 15.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.6%
2. LOCATE (article dbs w/o monographs) 9.2%
3. FIND 8.8%
4. Unrecognized term 8.6%
5. MEDLINE BACKFILES 6.9%
6. DATABASES 5.6%
7. MAIL 3.2%
8. DISPLAY 3.0%
9. COMMANDS 3.0%
10. ADD-ON SEARCH 2.8%
11. All others 32.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.2%
2. First word of command is invalid 14.6%
3. FIND command with invalid index name 6.9%
4. FIND command retrieves >1 book 5.7%
5. DISPLAY command-first of >1 screen 3.9%
6. DISPLAY command - middle of >1 screen 3.5%
7. FIND command retrieves 1 book 2.8%
8. NS command - no next screen 2.7%
9. FIND command with zero results 2.1%
10. DISPLAY command-complete in one screen 2.1%
11. All others 34.5%
Ten most frequent SHOW requests:
1. HISTORY 67.0%
2. SEARCH 20.1%
3. MEDLINE GLOSSARY 2.9%
4. MAIL STATUS 2.6%
5. SETTINGS 2.2%
6. MAIL SETTINGS 1.8%
7. UPDATE 1.1%
8. MEDLINE STATISTICS 0.7%
9. 0207 0.4%
10. UCSF PASSWORDS 0.4%
11. All others 0.7%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)