MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 03/10/01 through 03/16/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 176 669 845
Davis 32 483 114 629
Irvine 0 427 0 427
Los Angeles 0 224 180 404
Riverside 0 21 75 96
San Diego 108 656 48 812
San Francisco 119 0 1,329 1,448
Santa Barbara 0 8 27 35
Santa Cruz 8 0 60 68
Stanford 210
Other (including DLA) 0 0 1,986 1,986
_______________ _________ _________ _________
Total: 267 1,995 4,488 6,960
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,026 15,080 154,804
MED90 database 843 1,783 10,887
MED85 database 499 1,074 6,361
MED80 database 298 591 3,183
MED75 database 166 367 2,340
MED66 database 128 286 1,188
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 90 270 2,999
2-4 a.m. 42 109 1,549
4-6 a.m. 74 159 1,410
6-8 a.m. 158 311 2,978
8-10 a.m. 786 2,164 15,638
10-12 a.m. 1,271 3,625 33,818
12-2 p.m. 1,184 2,984 29,332
2-4 p.m. 1,274 3,557 34,521
4-6 p.m. 1,055 2,927 27,854
6-8 p.m. 557 1,616 14,035
8-10 p.m. 266 814 8,226
10-12 p.m. 203 645 6,403
__________ __________ __________ _________________
Total: 6,960 19,181 178,763
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 13:28 12:15 19:55 13:06
Median 10:22 7:06 13:34 7:59
Total:
Average 13:28 12:15 19:55 13:06
Median 10:22 7:06 13:34 7:59
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 3.9
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 6,960 100%
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 835.5
Retrievals per search - median 9.0
Retrievals per search - standard deviation 9111.5
Percent of searches completed with 0 results 21.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed 67.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,573 25.1%
DISPLAY (excluding automatic displays) 20,429 35.2%
BROWSE 460 0.8%
SELECT 166 0.3%
HELP 401 0.7%
EXPLAIN 287 0.5%
SAVE 4,100 7.1%
SET/RESET 3,324 5.7%
SHOW 157 0.3%
ADD-ON (AND, OR, AND NOT) 3,697 6.4%
LOGON or LOGOFF 7,739 13.3%
COMMENT 0 0.0%
OTHER 2,658 4.6%
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 6,420 31.1% 1,420 22.1% 12 114.0 808.5
TITLE WORD 2,933 14.2% 957 32.6% 7 499.6 3631.9
EXACT TITLE 170 0.8% 86 50.6% 1 9.3 60.4
JOURNAL 1,106 5.4% 330 29.8% 61 1650.5 4924.2
EXACT JOURNAL 266 1.3% 73 27.4% 408 2428.8 4868.7
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 7,017 34.0% 1,334 19.0% 31 1636.1 14579.2
SUBJECT WORD 14 0.1% 8 57.1% 207213 150619 116234
SUBJECT 477 2.3% 171 35.8% 434 3468.6 11592.1
MAJOR SUBJECT 65 0.3% 10 15.4% 721 3039.4 7035.7
EXACT SUBJECT 336 1.6% 84 25.0% 106 2461.8 14642.9
MAJOR XS 63 0.3% 4 6.3% 208 1404.8 5636.5
EXPLODE XS 50 0.2% 10 20.0% 158 5153.0 16357.8
EXPLODE MAJOR 8 0.0% 1 12.5% 6,185 29787.9 45962.0
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 803 3.9% 188 23.4% 17 213.9 718.2
LANGUAGE 408 2.0% 18 4.4% 81 1074.9 0.0
PUB TYPE 456 2.2% 27 5.9% 31 325.0 1582.4
Other indexes 174 0.8% 22 12.6% 1 66.2 335.4
By number of indexes:
Multiple 6,131 33.6% 1,515 24.7% 10 531.8 7149.0
Single 12,102 66.4% 2,480 20.5% 32 1403.3 11830.0
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 19 4.2% 0 0.0% 1 26.0 86.4
JOURNAL 75 16.4% 20 26.7% 2 80.9 386.0
EXACT JOURNAL 6 1.3% 2 33.3% 1 1.8 1.5
SUBJECT 322 70.6% 64 19.9% 3 18.5 165.9
EXACT SUBJECT 34 7.5% 6 17.6% 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 456 100% 92 20.2% 2 26.8 206.3
LIMITS:
Number of times limits (bit strings) used: 1,199
Use by bit string (percentage):
Current year minus 5 21.8%
Current year minus 4 0.0%
Current year minus 3 1.2%
Current year minus 2 0.8%
Current year minus 1 0.6%
Current year 0.1%
English Language 34.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.2%
Russian Language 0.0%
XS Abstract 1.2%
XS Adolescence 0.3%
XS Adult 0.3%
XS Aged 0.1%
XS Animal 0.7%
XS Case Report 0.0%
XS Child 0.8%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 7.5%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.4%
XS Mice 0.1%
XS Middle Age 1.5%
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 25.2%
PT Journal Article 0.1%
SUBSET AIM 1.4%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,976
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.7%
Percentage of ORs 3.4%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
BRIEF 61.7%
LONG 1.3%
MEDLINE 1.6%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 1.4%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 26.8%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.4%
Ten most frequent errors:
1. NS command - no next screen 39.1%
2. First word of command is invalid 26.1%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 2.2%
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 1.7%
9. DISPLAY command - no FIND results 1.6%
10. DISPLAY command-record numbers too large 0.8%
11. All others 14.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.0%
2. FIND 13.9%
3. LOCATE (article dbs w/o monographs) 12.2%
4. MEDLINE BACKFILES 9.8%
5. Unrecognized term 6.3%
6. COMMANDS 5.9%
7. DISPLAY 4.2%
8. DATABASES 3.5%
9. INDEXES 2.8%
10. ADD-ON SEARCH 2.4%
11. All others 29.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.8%
2. First word of command is invalid 14.0%
3. FIND command with invalid index name 7.3%
4. DISPLAY command-first of >1 screen 6.8%
5. DISPLAY command - middle of >1 screen 5.8%
6. DISPLAY command - last of >1 screen 4.2%
7. FIND command retrieves >1 book 3.9%
8. NS command - no next screen 2.9%
9. NS of SHOW/EXP command-no next screen 2.9%
10. DISPLAY command-complete in one screen 2.5%
11. All others 24.0%
Ten most frequent SHOW requests:
1. HISTORY 76.5%
2. SEARCH 10.1%
3. MEDLINE NEWS 4.2%
4. MAIL STATUS 3.4%
5. X016 0.8%
6. MAIL SETTINGS 0.8%
7. SETTINGS 0.8%
8. MEDLINE GLOSSARY 0.8%
9. MEDLINE LOADING STATISTICS 0.8%
10. UPDATE 0.8%
11. All others 0.8%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)