MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/14/00 through 10/20/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 200 764 964
Davis 24 732 187 943
Irvine 0 432 0 432
Los Angeles 0 490 176 666
Riverside 0 27 71 98
San Diego 100 594 49 743
San Francisco 131 0 1,736 1,867
Santa Barbara 0 22 44 66
Santa Cruz 42 24 112 178
Stanford 277
Other (including DLA) 0 0 1,929 1,929
_______________ _________ _________ _________
Total: 297 2,521 5,068 8,163
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,807 18,453 199,291
MED90 database 1,030 2,268 20,345
MED85 database 549 1,117 11,017
MED80 database 374 712 8,505
MED75 database 223 407 2,138
MED66 database 180 385 2,319
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 59 124 1,350
2-4 a.m. 23 84 190
4-6 a.m. 22 31 184
6-8 a.m. 143 390 2,224
8-10 a.m. 929 2,605 22,691
10-12 a.m. 1,681 4,612 39,269
12-2 p.m. 1,529 4,399 41,010
2-4 p.m. 1,712 4,798 43,355
4-6 p.m. 1,156 3,442 59,249
6-8 p.m. 428 1,217 11,361
8-10 p.m. 284 996 13,956
10-12 p.m. 197 644 8,776
__________ __________ __________ _________________
Total: 8,163 23,342 243,615
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 14:03 13:41 17:19 13:31
Median 7:58 7:54 12:29 8:14
Total:
Average 14:03 13:41 17:19 13:31
Median 7:58 7:54 12:29 8:14
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 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 8,163 100%
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 872.6
Retrievals per search - median 9.0
Retrievals per search - standard deviation 7468.1
Percent of searches completed with 0 results 20.3%
Percent of searches entered that are long 0.2%
Percent of long searches completed 49.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 17,698 24.9%
DISPLAY (excluding automatic displays) 24,605 34.6%
BROWSE 357 0.5%
SELECT 204 0.3%
HELP 574 0.8%
EXPLAIN 427 0.6%
SAVE 5,461 7.7%
SET/RESET 3,635 5.1%
SHOW 244 0.3%
ADD-ON (AND, OR, AND NOT) 4,589 6.5%
LOGON or LOGOFF 9,574 13.5%
COMMENT 0 0.0%
OTHER 3,692 5.2%
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 7,371 29.7% 1,434 19.5% 11 93.2 491.4
TITLE WORD 2,795 11.3% 885 31.7% 7 267.0 1403.3
EXACT TITLE 144 0.6% 64 44.4% 1 5.5 21.4
JOURNAL 1,198 4.8% 326 27.2% 225 2950.0 8125.4
EXACT JOURNAL 350 1.4% 97 27.7% 438 1933.2 3484.7
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 8,858 35.7% 1,707 19.3% 26 1280.2 10979.1
SUBJECT WORD 31 0.1% 19 61.3% 19 3208.8 8045.2
SUBJECT 694 2.8% 299 43.1% 158 4643.7 13353.5
MAJOR SUBJECT 49 0.2% 6 12.2% 187 3219.8 6203.5
EXACT SUBJECT 475 1.9% 69 14.5% 160 3881.1 14426.4
MAJOR XS 88 0.4% 12 13.6% 173 1908.9 5864.6
EXPLODE XS 156 0.6% 12 7.7% 877 16793.8 31559.8
EXPLODE MAJOR 33 0.1% 2 6.1% 1,370 8985.9 23278.9
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 1,144 4.6% 169 14.8% 14 268.7 1608.7
LANGUAGE 561 2.3% 27 4.8% 88 663.1 0.0
PUB TYPE 355 1.4% 27 7.6% 24 229.1 601.5
Other indexes 464 1.9% 54 11.6% 1 884.6 5444.2
By number of indexes:
Multiple 7,114 32.0% 1,510 21.2% 11 892.9 7310.0
Single 15,115 68.0% 3,059 20.2% 27 1264.2 9072.5
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 28 7.9% 4 14.3% 1 25.0 74.8
JOURNAL 60 16.9% 11 18.3% 2 4.2 5.7
EXACT JOURNAL 6 1.7% 2 33.3% 1 1.5 1.0
SUBJECT 235 66.2% 36 15.3% 4 21.5 96.5
EXACT SUBJECT 26 7.3% 3 11.5% 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 355 100% 56 15.8% 2 17.1 81.8
LIMITS:
Number of times limits (bit strings) used: 1,638
Use by bit string (percentage):
Current year minus 5 21.2%
Current year minus 4 0.0%
Current year minus 3 1.2%
Current year minus 2 0.1%
Current year minus 1 0.3%
Current year 0.3%
English Language 35.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.7%
XS Animal 0.4%
XS Case Report 0.2%
XS Child 1.2%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 11.7%
XS Infant 0.0%
XS Infant, Newborn 0.5%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.2%
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 22.5%
PT Journal Article 0.0%
SUBSET AIM 2.3%
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: 8,328
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.4%
Percentage of ORs 3.4%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 64.5%
LONG 0.9%
MEDLINE 0.9%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.3%
Ten most frequent errors:
1. NS command - no next screen 39.8%
2. First word of command is invalid 26.8%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 4.2%
5. PS command - no previous screen 1.9%
6. Search term missing from search command 1.7%
7. Valid command at an inappropriate time 1.7%
8. Add-on search with invalid index name 1.6%
9. NS of SHOW/EXP command-no next screen 1.2%
10. DISPLAY command-record numbers too large 1.1%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.3%
2. LOCATE (article dbs w/o monographs) 11.7%
3. MEDLINE BACKFILES 8.9%
4. FIND 6.1%
5. DISPLAY 5.4%
6. Unrecognized term 4.7%
7. INDEXES 3.7%
8. ADD-ON SEARCH 3.3%
9. COMMANDS 2.8%
10. G550 2.6%
11. All others 30.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.7%
2. First word of command is invalid 16.9%
3. FIND command with invalid index name 6.7%
4. DISPLAY command-first of >1 screen 5.5%
5. DISPLAY command - middle of >1 screen 5.4%
6. NS command - no next screen 3.7%
7. FIND command retrieves >1 book 3.7%
8. DISPLAY command contains invalid word 2.9%
9. Add-on without index name 2.7%
10. FIND command with zero results 2.5%
11. All others 37.5%
Ten most frequent SHOW requests:
1. HISTORY 76.7%
2. SEARCH 13.3%
3. MAIL STATUS 2.9%
4. MAIL SETTINGS 2.4%
5. SETTINGS 2.4%
6. UPDATE 1.0%
7. TIME 0.5%
8. MEDLINE LOADING STATISTICS 0.5%
9. DATABASES 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)