MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/16/00 through 12/22/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 120 493 613
Davis 15 420 95 530
Irvine 0 330 0 330
Los Angeles 0 123 103 226
Riverside 0 6 34 40
San Diego 82 413 48 543
San Francisco 73 0 1,124 1,197
Santa Barbara 0 5 16 21
Santa Cruz 1 5 35 41
Stanford 245
Other (including DLA) 0 0 1,476 1,476
_______________ _________ _________ _________
Total: 171 1,422 3,424 5,262
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,934 12,958 171,070
MED90 database 616 1,430 8,078
MED85 database 302 611 4,314
MED80 database 186 358 1,881
MED75 database 114 235 921
MED66 database 110 261 1,837
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 48 136 2,558
2-4 a.m. 33 81 512
4-6 a.m. 25 65 573
6-8 a.m. 117 370 4,183
8-10 a.m. 706 2,075 16,054
10-12 a.m. 1,075 3,220 31,579
12-2 p.m. 927 2,684 26,954
2-4 p.m. 1,000 3,021 29,857
4-6 p.m. 714 2,339 49,243
6-8 p.m. 343 977 13,276
8-10 p.m. 145 453 8,431
10-12 p.m. 129 432 4,881
__________ __________ __________ _________________
Total: 5,262 15,853 188,101
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 13:08 14:48 17:57 14:46
Median 9:34 9:28 13:57 9:54
Total:
Average 13:08 14:48 17:57 14:46
Median 9:34 9:28 13:57 9:54
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.6
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 5,262 100%
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 705.5
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6625.7
Percent of searches completed with 0 results 19.9%
Percent of searches entered that are long 0.6%
Percent of long searches completed 72.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 12,087 25.9%
DISPLAY (excluding automatic displays) 15,835 33.9%
BROWSE 299 0.6%
SELECT 127 0.3%
HELP 255 0.5%
EXPLAIN 229 0.5%
SAVE 3,774 8.1%
SET/RESET 2,417 5.2%
SHOW 209 0.4%
ADD-ON (AND, OR, AND NOT) 3,067 6.6%
LOGON or LOGOFF 6,041 12.9%
COMMENT 0 0.0%
OTHER 2,325 5.0%
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 5,082 29.8% 1,055 20.8% 13 91.0 430.8
TITLE WORD 2,232 13.1% 704 31.5% 7 899.5 14375.9
EXACT TITLE 110 0.6% 40 36.4% 1 8.3 19.1
JOURNAL 778 4.6% 217 27.9% 166 2717.7 7674.6
EXACT JOURNAL 281 1.6% 78 27.8% 542 2037.1 3600.1
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 5,652 33.2% 1,018 18.0% 27 1263.9 10695.7
SUBJECT WORD 10 0.1% 5 50.0% 1,010 1717.6 2027.8
SUBJECT 499 2.9% 167 33.5% 130 4756.4 31038.9
MAJOR SUBJECT 44 0.3% 5 11.4% 203 1182.3 2182.4
EXACT SUBJECT 252 1.5% 43 17.1% 100 991.5 5452.4
MAJOR XS 68 0.4% 5 7.4% 55 689.0 1782.2
EXPLODE XS 101 0.6% 14 13.9% 689 9158.7 19536.6
EXPLODE MAJOR 14 0.1% 1 7.1% 538 1229.8 2805.3
TREE NUMBER 1 0.0% 0 0.0% 63 63.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 752 4.4% 86 11.4% 20 672.5 2774.1
LANGUAGE 501 2.9% 47 9.4% 87 2624.6 0.0
PUB TYPE 295 1.7% 19 6.4% 29 1331.8 15822.4
Other indexes 400 2.3% 62 15.5% 1 40.3 232.2
By number of indexes:
Multiple 5,098 33.7% 1,089 21.4% 12 642.1 9965.3
Single 10,015 66.3% 1,966 19.6% 30 1062.8 6035.2
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 16 5.4% 2 12.5% 8 18.7 22.3
JOURNAL 60 20.3% 17 28.3% 3 12.0 31.9
EXACT JOURNAL 9 3.1% 2 22.2% 1 1.3 0.5
SUBJECT 196 66.4% 34 17.3% 4 20.0 97.6
EXACT SUBJECT 14 4.7% 1 7.1% 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 295 100% 56 19.0% 3 16.9 81.8
LIMITS:
Number of times limits (bit strings) used: 1,128
Use by bit string (percentage):
Current year minus 5 23.9%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.5%
Current year minus 1 0.2%
Current year 0.4%
English Language 41.9%
French Language 0.2%
Japanese Language 0.0%
German Language 0.3%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.1%
XS Adult 0.2%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.2%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.4%
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 21.2%
PT Journal Article 0.0%
SUBSET AIM 1.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 5,984
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.1%
Percentage of ORs 4.1%
Percentage of AND NOTs 1.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 65.4%
LONG 1.0%
MEDLINE 1.1%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 24.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 44.4%
2. First word of command is invalid 23.1%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 3.4%
5. Search term missing from search command 2.0%
6. Add-on search with invalid index name 2.0%
7. Valid command at an inappropriate time 1.6%
8. PS command - no previous screen 1.2%
9. Command containing escape or arrow key 1.1%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 14.8%
2. BOOKS DATABASE 13.1%
3. FIND 10.5%
4. MEDLINE BACKFILES 9.2%
5. Unrecognized term 6.1%
6. ADD-ON SEARCH 4.4%
7. LIMIT TO 3.5%
8. COMMANDS 3.5%
9. DATABASES 3.1%
10. INDEXES 3.1%
11. All others 25.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.6%
2. First word of command is invalid 13.2%
3. FIND command with invalid index name 8.3%
4. DISPLAY command-complete in one screen 6.0%
5. FIND command retrieves >1 book 5.8%
6. DISPLAY command - middle of >1 screen 5.8%
7. DISPLAY command-first of >1 screen 4.3%
8. NS command - no next screen 2.9%
9. PA command modified to Medline format 2.7%
10. 103 1.9%
11. All others 28.8%
Ten most frequent SHOW requests:
1. HISTORY 72.6%
2. MAIL STATUS 7.5%
3. SEARCH 5.7%
4. MEDLINE GLOSSARY 3.8%
5. SETTINGS 2.8%
6. MAIL SETTINGS 1.9%
7. MEDLINE NEWS 1.9%
8. DISPLAY 0.9%
9. FIND DISPLAY 0.9%
10. MEDLINE LOADING STATISTICS 0.9%
11. All others 0.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)