MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/28/00 through 11/03/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 140 668 808
Davis 45 707 251 1,003
Irvine 0 527 0 527
Los Angeles 0 464 195 659
Riverside 0 18 63 81
San Diego 87 533 50 670
San Francisco 136 0 1,541 1,677
Santa Barbara 0 13 33 46
Santa Cruz 11 7 66 84
Stanford 225
Other (including DLA) 0 0 1,992 1,992
_______________ _________ _________ _________
Total: 279 2,409 4,859 7,772
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,642 17,544 222,031
MED90 database 906 1,902 15,234
MED85 database 517 977 8,231
MED80 database 328 598 4,807
MED75 database 212 402 3,396
MED66 database 167 336 2,681
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 136 388 4,131
2-4 a.m. 16 62 596
4-6 a.m. 30 86 1,442
6-8 a.m. 158 542 4,598
8-10 a.m. 969 2,537 29,727
10-12 a.m. 1,496 4,100 53,177
12-2 p.m. 1,389 3,733 44,302
2-4 p.m. 1,590 4,449 50,616
4-6 p.m. 1,113 3,114 33,671
6-8 p.m. 402 1,301 16,872
8-10 p.m. 290 878 11,706
10-12 p.m. 183 569 5,542
__________ __________ __________ _________________
Total: 7,772 21,759 256,380
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 15:44 14:17 13:03 13:59
Median 10:46 8:46 11:37 8:58
Total:
Average 15:44 14:17 13:03 13:59
Median 10:46 8:46 11:37 8:58
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.4
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 7,772 100%
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 752.4
Retrievals per search - median 10.0
Retrievals per search - standard deviation 6128.6
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed 58.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,453 23.8%
DISPLAY (excluding automatic displays) 24,817 35.9%
BROWSE 670 1.0%
SELECT 565 0.8%
HELP 563 0.8%
EXPLAIN 429 0.6%
SAVE 5,463 7.9%
SET/RESET 3,545 5.1%
SHOW 280 0.4%
ADD-ON (AND, OR, AND NOT) 4,261 6.2%
LOGON or LOGOFF 8,999 13.0%
COMMENT 0 0.0%
OTHER 3,089 4.5%
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 6,593 28.5% 1,318 20.0% 12 102.1 474.9
TITLE WORD 2,786 12.0% 826 29.6% 8 497.6 3185.5
EXACT TITLE 164 0.7% 76 46.3% 1 15.7 76.2
JOURNAL 1,047 4.5% 310 29.6% 45 1903.4 5358.0
EXACT JOURNAL 328 1.4% 76 23.2% 484 2098.8 4366.1
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 8,431 36.4% 1,605 19.0% 30 1193.0 7972.8
SUBJECT WORD 19 0.1% 6 31.6% 250 302.7 333.8
SUBJECT 685 3.0% 258 37.7% 185 3124.1 8029.3
MAJOR SUBJECT 69 0.3% 9 13.0% 629 4596.6 7220.7
EXACT SUBJECT 378 1.6% 75 19.8% 120 2121.8 6336.7
MAJOR XS 73 0.3% 8 11.0% 572 2055.8 3890.9
EXPLODE XS 145 0.6% 19 13.1% 657 13650.9 41380.0
EXPLODE MAJOR 24 0.1% 1 4.2% 518 3967.3 7094.4
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 991 4.3% 142 14.3% 12 171.9 549.2
LANGUAGE 511 2.2% 18 3.5% 66 1277.3 0.0
PUB TYPE 667 2.9% 48 7.2% 35 489.8 1694.7
Other indexes 453 2.0% 62 13.7% 1 30.1 175.1
By number of indexes:
Multiple 6,696 32.4% 1,414 21.1% 12 422.2 4614.9
Single 13,968 67.6% 2,827 20.2% 32 1262.2 7906.7
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 253 37.9% 19 7.5% 4 13.4 47.1
JOURNAL 67 10.0% 15 22.4% 2 7.0 12.8
EXACT JOURNAL 7 1.0% 2 28.6% 1 1.0 0.0
SUBJECT 293 43.9% 55 18.8% 3 25.1 186.9
EXACT SUBJECT 47 7.0% 7 14.9% 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 667 100% 98 14.7% 3 16.7 124.7
LIMITS:
Number of times limits (bit strings) used: 1,579
Use by bit string (percentage):
Current year minus 5 27.2%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.7%
Current year minus 1 0.5%
Current year 0.4%
English Language 34.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.1%
XS Adolescence 0.1%
XS Adult 0.8%
XS Aged 0.3%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.1%
XS Middle Age 0.0%
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 22.9%
PT Journal Article 0.0%
SUBSET AIM 1.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,980
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.9%
Percentage of ORs 4.5%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
BRIEF 63.4%
LONG 0.8%
MEDLINE 1.2%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.8%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.1%
Ten most frequent errors:
1. NS command - no next screen 38.8%
2. First word of command is invalid 28.7%
3. FIND command with invalid index name 6.7%
4. DISPLAY command contains invalid word 3.3%
5. Search term missing from search command 2.1%
6. PS command - no previous screen 1.9%
7. Add-on search with invalid index name 1.8%
8. Valid command at an inappropriate time 1.2%
9. DISPLAY command-record numbers too large 1.0%
10. NS of SHOW/EXP command-no next screen 0.9%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.2%
2. LOCATE (article dbs w/o monographs) 11.7%
3. INDEXES 9.3%
4. FIND 8.2%
5. Unrecognized term 6.5%
6. MEDLINE BACKFILES 6.5%
7. DISPLAY 5.1%
8. COMMANDS 4.7%
9. DATABASES 4.0%
10. ADD-ON SEARCH 2.6%
11. All others 26.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.5%
2. First word of command is invalid 16.7%
3. FIND command with invalid index name 7.9%
4. DISPLAY command-first of >1 screen 6.1%
5. FIND command retrieves >1 book 6.0%
6. DISPLAY command - middle of >1 screen 5.9%
7. FIND command with zero results 3.1%
8. NS command - no next screen 3.0%
9. NS of SHOW/EXP command-no next screen 2.9%
10. Add-on without index name 2.2%
11. All others 27.3%
Ten most frequent SHOW requests:
1. HISTORY 59.0%
2. SEARCH 25.0%
3. MAIL STATUS 7.1%
4. SETTINGS 1.9%
5. MAIL SETTINGS 1.4%
6. MEDLINE GLOSSARY 1.4%
7. MEDLINE STATISTICS 0.9%
8. 0627 0.5%
9. DISPLAY 0.5%
10. SYSTEM STATISTICS 0.5%
11. All others 1.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)