MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/21/01 through 04/27/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 167 582 749
Davis 33 986 69 1,088
Irvine 0 297 0 297
Los Angeles 0 14 87 101
Riverside 0 10 64 74
San Diego 149 516 66 731
San Francisco 67 0 1,494 1,561
Santa Barbara 0 8 31 39
Santa Cruz 33 9 72 114
Stanford 246
Other (including DLA) 0 0 1,943 1,943
_______________ _________ _________ _________
Total: 282 2,007 4,408 6,943
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,079 15,532 197,640
MED90 database 839 1,723 16,591
MED85 database 445 914 10,097
MED80 database 285 550 5,012
MED75 database 169 352 3,609
MED66 database 126 263 2,481
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 47 151 1,150
2-4 a.m. 91 140 643
4-6 a.m. 350 426 930
6-8 a.m. 112 318 3,280
8-10 a.m. 885 2,341 48,249
10-12 a.m. 1,233 3,380 31,409
12-2 p.m. 1,105 3,193 34,732
2-4 p.m. 1,181 3,574 48,306
4-6 p.m. 1,023 3,133 31,582
6-8 p.m. 400 1,242 14,310
8-10 p.m. 341 958 11,130
10-12 p.m. 175 478 9,709
__________ __________ __________ _________________
Total: 6,943 19,334 235,430
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 18:55 12:13 14:18 13:00
Median 13:06 6:51 12:18 7:47
Total:
Average 18:55 12:13 14:18 13:00
Median 13:06 6:51 12:18 7:47
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 2.1
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 6,943 100%
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 874.9
Retrievals per search - median 8.0
Retrievals per search - standard deviation 8150.6
Percent of searches completed with 0 results 21.9%
Percent of searches entered that are long 0.3%
Percent of long searches completed 50.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,734 25.2%
DISPLAY (excluding automatic displays) 20,528 35.1%
BROWSE 547 0.9%
SELECT 156 0.3%
HELP 355 0.6%
EXPLAIN 261 0.4%
SAVE 3,908 6.7%
SET/RESET 3,562 6.1%
SHOW 190 0.3%
ADD-ON (AND, OR, AND NOT) 3,823 6.5%
LOGON or LOGOFF 7,964 13.6%
COMMENT 0 0.0%
OTHER 2,503 4.3%
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 6,154 29.3% 1,148 18.7% 11 126.9 884.4
TITLE WORD 2,866 13.6% 857 29.9% 7 406.3 2655.8
EXACT TITLE 154 0.7% 57 37.0% 1 12.4 59.3
JOURNAL 1,049 5.0% 323 30.8% 22 1486.4 6898.3
EXACT JOURNAL 292 1.4% 67 22.9% 359 2393.9 4638.7
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 7,001 33.3% 1,285 18.4% 31 1468.0 10935.3
SUBJECT WORD 17 0.1% 9 52.9% 6,535 117767 161893
SUBJECT 517 2.5% 205 39.6% 173 3037.4 8826.3
MAJOR SUBJECT 52 0.2% 7 13.5% 305 3014.0 9704.5
EXACT SUBJECT 320 1.5% 70 21.9% 92 1580.9 7152.8
MAJOR XS 60 0.3% 12 20.0% 130 363.3 539.2
EXPLODE XS 90 0.4% 18 20.0% 78 5814.1 19185.0
EXPLODE MAJOR 41 0.2% 8 19.5% 693 1634.5 2463.9
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 934 4.4% 150 16.1% 8 274.5 2460.6
LANGUAGE 492 2.3% 30 6.1% 58 981.4 0.0
PUB TYPE 543 2.6% 29 5.3% 39 673.5 5013.2
Other indexes 608 2.9% 405 66.6% 1 5415.7 24044.1
By number of indexes:
Multiple 6,216 33.6% 1,263 20.3% 10 546.8 6989.2
Single 12,296 66.4% 2,836 23.1% 33 1488.6 10434.8
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 11 2.0% 0 0.0% 2 51.0 158.9
JOURNAL 86 15.8% 11 12.8% 1 4.3 7.3
EXACT JOURNAL 9 1.7% 2 22.2% 1 1.1 0.4
SUBJECT 405 74.6% 112 27.7% 2 69.4 478.5
EXACT SUBJECT 32 5.9% 6 18.8% 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 543 100% 131 24.1% 2 51.6 405.1
LIMITS:
Number of times limits (bit strings) used: 1,359
Use by bit string (percentage):
Current year minus 5 21.0%
Current year minus 4 0.0%
Current year minus 3 0.4%
Current year minus 2 0.3%
Current year minus 1 0.0%
Current year 0.2%
English Language 38.6%
French Language 0.1%
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 1.2%
XS Animal 0.0%
XS Case Report 0.2%
XS Child 0.7%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 8.8%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.2%
XS Rats 0.2%
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 23.0%
PT Journal Article 0.0%
SUBSET AIM 2.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,393
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.0%
Percentage of ORs 3.7%
Percentage of AND NOTs 2.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
BRIEF 62.5%
LONG 1.0%
MEDLINE 1.5%
FIELDS 4.2%
PERIODICALS 0.0%
BROWSE REVIEW 1.6%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 36.8%
2. First word of command is invalid 24.8%
3. DISPLAY command - no FIND results 7.7%
4. FIND command with invalid index name 6.1%
5. DISPLAY command contains invalid word 4.4%
6. PS command - no previous screen 1.8%
7. Search term missing from search command 1.8%
8. Add-on search with invalid index name 1.7%
9. Valid command at an inappropriate time 1.3%
10. Command containing escape or arrow key 0.9%
11. All others 12.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 25.3%
2. BOOKS DATABASE 13.0%
3. MEDLINE BACKFILES 6.5%
4. COMMANDS 6.1%
5. FIND 5.4%
6. Unrecognized term 5.0%
7. DATABASES 3.1%
8. ADD-ON SEARCH 3.1%
9. DISPLAY 3.1%
10. INDEXES 3.1%
11. All others 27.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.1%
2. First word of command is invalid 16.7%
3. DISPLAY command-first of >1 screen 9.1%
4. FIND command with invalid index name 8.0%
5. FIND command retrieves >1 book 4.2%
6. DISPLAY command - middle of >1 screen 3.6%
7. Add-on without index name 3.1%
8. FIND command retrieves 1 book 2.9%
9. DISPLAY command - last of >1 screen 2.6%
10. NS command - no next screen 2.4%
11. All others 26.4%
Ten most frequent SHOW requests:
1. HISTORY 66.2%
2. SEARCH 21.3%
3. UPDATE 4.4%
4. MAIL STATUS 3.7%
5. MEDLINE GLOSSARY 2.2%
6. CLINICAL ALERTS 0.7%
7. MEDLINE LOADING STATISTICS 0.7%
8. MEDLINE NEWS 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)