MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/09/01 through 06/15/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 61 484 545
Davis 26 724 69 819
Irvine 0 295 0 295
Los Angeles 0 191 92 283
Riverside 0 9 45 54
San Diego 105 372 75 552
San Francisco 86 0 1,171 1,257
Santa Barbara 0 1 14 15
Santa Cruz 0 7 54 61
Stanford 262
Other (including DLA) 0 0 2,347 2,347
_______________ _________ _________ _________
Total: 217 1,660 4,351 6,490
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,255 13,781 138,707
MED90 database 850 1,756 10,282
MED85 database 522 1,009 4,719
MED80 database 350 515 2,312
MED75 database 266 368 1,028
MED66 database 247 386 2,018
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 63 197 2,588
2-4 a.m. 32 113 903
4-6 a.m. 37 82 1,919
6-8 a.m. 109 332 3,595
8-10 a.m. 688 2,078 18,558
10-12 a.m. 1,208 3,444 30,353
12-2 p.m. 1,143 3,171 25,807
2-4 p.m. 1,452 3,878 33,992
4-6 p.m. 973 2,485 21,231
6-8 p.m. 498 1,131 9,719
8-10 p.m. 153 503 6,294
10-12 p.m. 134 401 4,107
__________ __________ __________ _________________
Total: 6,490 17,815 159,066
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 14:37 14:39 20:29 15:05
Median 10:50 9:26 12:57 9:47
Total:
Average 14:37 14:39 20:29 15:05
Median 10:50 9:26 12:57 9:47
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.3
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 6,490 100%
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 2.7
Retrievals per search - average 1204.1
Retrievals per search - median 8.0
Retrievals per search - standard deviation 10741.2
Percent of searches completed with 0 results 22.1%
Percent of searches entered that are long 0.2%
Percent of long searches completed 66.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 13,637 26.1%
DISPLAY (excluding automatic displays) 17,845 34.2%
BROWSE 337 0.6%
SELECT 138 0.3%
HELP 242 0.5%
EXPLAIN 196 0.4%
SAVE 3,261 6.2%
SET/RESET 3,613 6.9%
SHOW 446 0.9%
ADD-ON (AND, OR, AND NOT) 3,555 6.8%
LOGON or LOGOFF 6,189 11.9%
COMMENT 0 0.0%
OTHER 2,762 5.3%
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 5,583 28.4% 1,128 20.2% 11 111.6 794.7
TITLE WORD 2,326 11.8% 712 30.6% 7 596.5 3748.0
EXACT TITLE 124 0.6% 51 41.1% 1 14.8 74.8
JOURNAL 793 4.0% 235 29.6% 168 1735.2 5963.3
EXACT JOURNAL 357 1.8% 57 16.0% 2,013 2917.4 3307.6
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 6,774 34.4% 1,704 25.2% 28 1518.2 11010.2
SUBJECT WORD 11 0.1% 2 18.2% 39 34157.6 98977.6
SUBJECT 435 2.2% 143 32.9% 252 11348.9 48189.8
MAJOR SUBJECT 50 0.3% 3 6.0% 404 1717.1 4130.2
EXACT SUBJECT 364 1.8% 76 20.9% 63 6827.7 26506.6
MAJOR XS 62 0.3% 0 0.0% 93 721.5 1368.9
EXPLODE XS 155 0.8% 4 2.6% 3,434 27112.6 42852.0
EXPLODE MAJOR 87 0.4% 3 3.4% 1,413 10004.0 23141.8
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 842 4.3% 161 19.1% 13 164.8 1176.3
LANGUAGE 702 3.6% 242 34.5% 43 743.3 0.0
PUB TYPE 334 1.7% 257 76.9% 13 206.3 1523.3
Other indexes 376 1.9% 31 8.2% 1 10.2 76.9
By number of indexes:
Multiple 6,061 35.3% 1,394 23.0% 12 1718.4 15661.6
Single 11,094 64.7% 2,437 22.0% 28 1540.6 10183.5
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 3 0.9% 0 0.0% 2 4.3 4.0
JOURNAL 84 25.1% 21 25.0% 2 4.5 7.9
EXACT JOURNAL 6 1.8% 1 16.7% 8 5.2 3.8
SUBJECT 203 60.8% 28 13.8% 3 73.6 876.1
EXACT SUBJECT 38 11.4% 3 7.9% 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 334 100% 53 15.9% 2 47.1 691.5
LIMITS:
Number of times limits (bit strings) used: 1,454
Use by bit string (percentage):
Current year minus 5 15.1%
Current year minus 4 0.0%
Current year minus 3 0.4%
Current year minus 2 0.2%
Current year minus 1 0.3%
Current year 0.4%
English Language 53.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.3%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.7%
XS English Abstract 0.0%
XS Female 3.0%
XS Human 7.8%
XS Infant 0.0%
XS Infant, Newborn 0.2%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.1%
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 15.3%
PT Journal Article 0.0%
SUBSET AIM 1.7%
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: 7,305
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 88.5%
Percentage of ORs 8.3%
Percentage of AND NOTs 3.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 61.5%
LONG 0.9%
MEDLINE 1.8%
FIELDS 4.2%
PERIODICALS 0.0%
BROWSE REVIEW 1.3%
BROWSE LONG 0.9%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.8%
Ten most frequent errors:
1. NS command - no next screen 40.6%
2. First word of command is invalid 23.6%
3. FIND command with invalid index name 6.7%
4. DISPLAY command contains invalid word 4.4%
5. PS command - no previous screen 1.9%
6. Add-on search with invalid index name 1.8%
7. DISPLAY command - no FIND results 1.8%
8. Search term missing from search command 1.4%
9. Valid command at an inappropriate time 1.1%
10. Command containing escape or arrow key 0.9%
11. All others 15.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.8%
2. FIND 11.7%
3. LOCATE (article dbs w/o monographs) 10.2%
4. INDEXES 10.2%
5. MEDLINE BACKFILES 7.1%
6. COMMANDS 5.1%
7. ADD-ON SEARCH 4.6%
8. Unrecognized term 4.1%
9. 1752 2.6%
10. DATES INDEX 2.6%
11. All others 33.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.3%
2. First word of command is invalid 13.5%
3. FIND command with invalid index name 7.3%
4. NS command - no next screen 5.0%
5. DISPLAY command - middle of >1 screen 4.8%
6. FIND command retrieves >1 book 4.1%
7. DISPLAY command - last of >1 screen 3.9%
8. DISPLAY command-first of >1 screen 3.0%
9. DISPLAY command-complete in one screen 2.3%
10. Valid command at an inappropriate time 2.1%
11. All others 29.1%
Ten most frequent SHOW requests:
1. HISTORY 69.4%
2. SEARCH 16.0%
3. MAIL STATUS 7.6%
4. MEDLINE GLOSSARY 2.1%
5. SETTINGS 1.4%
6. MEDLINE LOADING STATISTICS 0.7%
7. MEDLINE STATISTICS 0.7%
8. 5100 0.7%
9. 5130 0.7%
10. UPDATE 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)