MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/24/00 through 06/30/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 166 897 1,063
Davis 30 698 156 884
Irvine 0 540 0 540
Los Angeles 0 465 183 648
Riverside 0 12 67 79
San Diego 146 682 52 880
San Francisco 103 0 1,814 1,917
Santa Barbara 0 29 85 114
Santa Cruz 23 9 115 147
Stanford 376
Other (including DLA) 0 0 2,337 2,337
_______________ _________ _________ _________
Total: 302 2,601 5,706 8,985
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,220 19,284 214,572
MED90 database 1,226 2,910 20,448
MED85 database 679 1,416 10,439
MED80 database 442 904 6,803
MED75 database 247 534 4,253
MED66 database 171 388 4,066
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 93 255 4,254
2-4 a.m. 43 103 2,022
4-6 a.m. 24 48 355
6-8 a.m. 135 337 3,459
8-10 a.m. 878 2,490 19,227
10-12 a.m. 1,739 4,939 46,667
12-2 p.m. 1,789 5,008 57,699
2-4 p.m. 1,812 5,299 52,378
4-6 p.m. 1,383 3,706 38,424
6-8 p.m. 512 1,497 15,773
8-10 p.m. 322 931 10,733
10-12 p.m. 255 823 9,590
__________ __________ __________ _________________
Total: 8,985 25,436 260,581
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 14:38 13:58 22:03 13:52
Median 10:43 8:30 10:58 8:26
Total:
Average 14:38 13:58 22:03 13:52
Median 10:43 8:30 10:58 8:26
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.6
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 8,985 100%
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 1124.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 10022.6
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed 54.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 19,181 25.6%
DISPLAY (excluding automatic displays) 24,976 33.3%
BROWSE 746 1.0%
SELECT 209 0.3%
HELP 414 0.6%
EXPLAIN 382 0.5%
SAVE 5,699 7.6%
SET/RESET 4,258 5.7%
SHOW 291 0.4%
ADD-ON (AND, OR, AND NOT) 5,189 6.9%
LOGON or LOGOFF 9,931 13.3%
COMMENT 0 0.0%
OTHER 3,631 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 8,414 30.9% 1,619 19.2% 11 113.2 743.7
TITLE WORD 3,044 11.2% 997 32.8% 7 2187.6 15660.5
EXACT TITLE 162 0.6% 76 46.9% 1 32.6 156.5
JOURNAL 1,351 5.0% 437 32.3% 208 1839.7 5877.1
EXACT JOURNAL 284 1.0% 68 23.9% 270 1889.5 3870.9
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 9,679 35.5% 1,845 19.1% 25 1572.5 12499.6
SUBJECT WORD 21 0.1% 9 42.9% 33 528.4 1084.8
SUBJECT 633 2.3% 242 38.2% 221 2837.3 6391.5
MAJOR SUBJECT 96 0.4% 6 6.3% 135 2212.8 6024.9
EXACT SUBJECT 359 1.3% 45 12.5% 383 24037.0 50702.9
MAJOR XS 55 0.2% 14 25.5% 117 497.6 1055.1
EXPLODE XS 291 1.1% 40 13.7% 3,346 22152.6 47984.8
EXPLODE MAJOR 37 0.1% 10 27.0% 1,052 2832.0 3899.4
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 1,415 5.2% 171 12.1% 15 520.6 2969.5
LANGUAGE 521 1.9% 31 5.9% 75 902.5 0.0
PUB TYPE 742 2.7% 24 3.2% 33 492.6 2417.8
Other indexes 487 1.8% 59 12.1% 1 160.5 1882.0
By number of indexes:
Multiple 8,179 33.6% 1,734 21.2% 11 1517.4 12834.2
Single 16,128 66.3% 3,223 20.0% 27 1448.8 10698.9
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 25 3.4% 3 12.0% 3 18.0 36.9
JOURNAL 451 60.8% 120 26.6% 4 11.4 31.6
EXACT JOURNAL 8 1.1% 3 37.5% 1 1.6 0.9
SUBJECT 234 31.5% 49 20.9% 3 24.4 203.1
EXACT SUBJECT 24 3.2% 8 33.3% 1 8.3 19.8
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 742 100% 183 24.7% 3 15.8 119.6
LIMITS:
Number of times limits (bit strings) used: 1,396
Use by bit string (percentage):
Current year minus 5 17.4%
Current year minus 4 0.0%
Current year minus 3 0.5%
Current year minus 2 0.6%
Current year minus 1 0.5%
Current year 0.4%
English Language 39.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.3%
XS Animal 0.1%
XS Case Report 0.4%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.1%
XS Female 0.1%
XS Human 8.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.9%
XS Mice 0.3%
XS Middle Age 0.0%
XS Rats 0.1%
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 26.1%
PT Journal Article 0.4%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 9,497
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.2%
Percentage of ORs 4.6%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
BRIEF 64.4%
LONG 0.8%
MEDLINE 1.2%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 1.7%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.8%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 41.0%
2. First word of command is invalid 26.4%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.7%
5. Add-on search with invalid index name 1.8%
6. Search term missing from search command 1.8%
7. PS command - no previous screen 1.6%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command-record numbers too large 1.2%
10. Command containing escape or arrow key 1.0%
11. All others 13.9%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.8%
2. FIND 8.1%
3. LOCATE (article dbs w/o monographs) 7.9%
4. MEDLINE BACKFILES 7.9%
5. INDEXES 7.9%
6. DISPLAY 6.0%
7. COMMANDS 6.0%
8. Unrecognized term 5.8%
9. MAIL 4.2%
10. DATABASES 4.2%
11. All others 28.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.0%
2. First word of command is invalid 16.0%
3. FIND command with invalid index name 6.9%
4. DISPLAY command - middle of >1 screen 5.9%
5. DISPLAY command-first of >1 screen 5.4%
6. NS command - no next screen 5.3%
7. FIND command retrieves >1 book 4.6%
8. FIND command with zero results 3.6%
9. DISPLAY command-complete in one screen 2.1%
10. DISPLAY command - last of >1 screen 2.1%
11. All others 29.3%
Ten most frequent SHOW requests:
1. HISTORY 75.4%
2. SEARCH 13.8%
3. MAIL STATUS 6.3%
4. SETTINGS 1.3%
5. MAIL SETTINGS 0.9%
6. G620 0.4%
7. MEDLINE GLOSSARY 0.4%
8. MEDLINE LOADING STATISTICS 0.4%
9. 5200 0.4%
10. CC LOADING STATISTICS 0.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)