MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/01/00 through 05/31/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 696 3,300 3,996
Davis 255 3,179 934 4,368
Irvine 0 2,060 0 2,060
Los Angeles 0 2,030 934 2,964
Riverside 0 166 394 560
San Diego 715 2,722 144 3,581
San Francisco 626 0 7,147 7,773
Santa Barbara 0 65 181 246
Santa Cruz 198 102 312 612
Stanford 1,435
Other (including DLA) 0 0 8,253 8,253
_______________ _________ _________ _________
Total: 1,794 11,020 21,599 35,848
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 25,855 106,422 969,084
MED90 database 4,604 10,268 73,653
MED85 database 2,303 4,660 28,875
MED80 database 1,527 3,024 16,394
MED75 database 881 1,773 9,707
MED66 database 678 1,646 15,067
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 420 1,135 15,840
2-4 a.m. 118 286 3,742
4-6 a.m. 154 402 16,901
6-8 a.m. 680 1,798 15,294
8-10 a.m. 3,431 9,933 98,089
10-12 a.m. 7,041 18,956 169,889
12-2 p.m. 6,309 20,682 197,635
2-4 p.m. 7,352 27,070 227,304
4-6 p.m. 5,315 20,085 175,493
6-8 p.m. 2,464 11,618 84,679
8-10 p.m. 1,510 8,166 64,022
10-12 p.m. 1,054 7,662 43,892
__________ __________ __________ _________________
Total: 35,848 127,793 1,112,780
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 16:51 14:04 16:32 14:06
Median 10:30 8:45 11:26 8:51
Total:
Average 16:51 14:04 16:32 14:06
Median 10:30 8:45 11:26 8:51
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.9 2.8
transmission of response
Display - from receipt of command at DLA until 0.1 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 35,848 100%
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 3.6
Retrievals per search - average 660.8
Retrievals per search - median 5.0
Retrievals per search - standard deviation 6743.2
Percent of searches completed with 0 results 29.7%
Percent of searches entered that are long 0.3%
Percent of long searches completed 56.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 103,702 30.8%
DISPLAY (excluding automatic displays) 111,563 33.1%
BROWSE 1,392 0.4%
SELECT 801 0.2%
HELP 2,713 0.8%
EXPLAIN 1,839 0.5%
SAVE 21,831 6.5%
SET/RESET 16,137 4.8%
SHOW 1,125 0.3%
ADD-ON (AND, OR, AND NOT) 19,983 5.9%
LOGON or LOGOFF 41,444 12.3%
COMMENT 1 0.0%
OTHER 14,266 4.2%
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 33,088 20.7% 6,821 20.6% 12 120.0 788.0
TITLE WORD 13,526 8.5% 4,275 31.6% 8 470.4 4755.5
EXACT TITLE 869 0.5% 396 45.6% 1 31.9 263.1
JOURNAL 4,797 3.0% 1,522 31.7% 110 2024.4 6049.9
EXACT JOURNAL 25,020 15.7% 16,592 66.3% 9 374.4 1861.9
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 65,215 40.8% 23,775 36.5% 23 1114.9 8573.0
SUBJECT WORD 123 0.1% 62 50.4% 220 2580.8 6156.3
SUBJECT 3,428 2.1% 1,348 39.3% 209 5215.2 26084.0
MAJOR SUBJECT 168 0.1% 22 13.1% 133 1595.3 4236.4
EXACT SUBJECT 1,225 0.8% 268 21.9% 103 1716.0 6239.0
MAJOR XS 156 0.1% 16 10.3% 336 2529.6 14307.2
EXPLODE XS 874 0.5% 114 13.0% 119 7464.9 30941.5
EXPLODE MAJOR 105 0.1% 8 7.6% 1,017 10207.2 30254.8
TREE NUMBER 2 0.0% 2 100% 0 0.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 5,239 3.3% 863 16.5% 9 148.3 814.0
LANGUAGE 2,471 1.5% 134 5.4% 70 735.5 0.0
PUB TYPE 1,380 0.9% 160 11.6% 32 442.6 3431.1
Other indexes 1,542 1.0% 157 10.2% 1 180.4 3010.7
By number of indexes:
Multiple 56,160 45.5% 23,252 41.4% 10 407.1 5363.9
Single 67,209 54.5% 13,915 20.7% 30 1320.3 9491.1
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 60 4.3% 6 10.0% 4 64.7 177.4
JOURNAL 297 21.5% 71 23.9% 3 25.6 155.1
EXACT JOURNAL 99 7.2% 30 30.3% 1 7.2 26.1
SUBJECT 861 62.4% 134 15.6% 3 38.1 464.1
EXACT SUBJECT 51 3.7% 15 29.4% 1 1.1 0.5
TREE NUMBER 12 0.9% 4 33.3% 122 378.4 459.7
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 1,380 100% 260 18.8% 2 36.2 385.2
LIMITS:
Number of times limits (bit strings) used: 14,195
Use by bit string (percentage):
Current year minus 5 5.7%
Current year minus 4 0.0%
Current year minus 3 0.6%
Current year minus 2 0.2%
Current year minus 1 0.2%
Current year 0.3%
English Language 18.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.1%
XS Adult 0.0%
XS Aged 0.1%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 3.0%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
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 12.0%
PT Journal Article 56.4%
SUBSET AIM 1.8%
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: 108,459
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 55.0%
Percentage of ORs 22.8%
Percentage of AND NOTs 22.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
BRIEF 64.4%
LONG 0.9%
MEDLINE 1.1%
FIELDS 3.1%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.9%
Ten most frequent errors:
1. NS command - no next screen 40.0%
2. First word of command is invalid 26.4%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 3.9%
5. PS command - no previous screen 2.2%
6. Valid command at an inappropriate time 1.8%
7. Search term missing from search command 1.7%
8. Add-on search with invalid index name 1.7%
9. DISPLAY command-record numbers too large 1.2%
10. Command containing escape or arrow key 1.1%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.4%
2. LOCATE (article dbs w/o monographs) 11.3%
3. MEDLINE BACKFILES 8.4%
4. FIND 8.3%
5. Unrecognized term 5.7%
6. COMMANDS 5.6%
7. DISPLAY 4.0%
8. ADD-ON SEARCH 4.0%
9. DATABASES 3.8%
10. INDEXES 3.2%
11. All others 28.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.3%
2. First word of command is invalid 16.8%
3. FIND command with invalid index name 7.4%
4. DISPLAY command-first of >1 screen 5.5%
5. FIND command retrieves >1 book 5.3%
6. DISPLAY command - middle of >1 screen 4.1%
7. NS command - no next screen 3.6%
8. DISPLAY command - last of >1 screen 3.3%
9. NS of SHOW/EXP command-no next screen 2.2%
10. PS command - no previous screen 2.1%
11. All others 30.4%
Ten most frequent SHOW requests:
1. HISTORY 75.0%
2. SEARCH 13.5%
3. MAIL STATUS 4.1%
4. SETTINGS 2.1%
5. UPDATE 1.2%
6. MEDLINE GLOSSARY 1.1%
7. DATABASES 0.7%
8. MAIL SETTINGS 0.6%
9. CLINICAL ALERTS 0.4%
10. 0876 0.2%
11. All others 1.1%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)