MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/14/01 through 04/20/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 160 542 702
Davis 10 937 87 1,034
Irvine 0 488 0 488
Los Angeles 0 23 163 186
Riverside 0 5 49 54
San Diego 88 396 24 508
San Francisco 97 0 1,367 1,464
Santa Barbara 0 4 45 49
Santa Cruz 16 10 98 124
Stanford 346
Other (including DLA) 0 0 2,364 2,364
_______________ _________ _________ _________
Total: 211 2,023 4,739 7,319
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,259 16,255 173,250
MED90 database 873 1,784 9,806
MED85 database 485 985 5,625
MED80 database 336 685 3,646
MED75 database 215 449 2,881
MED66 database 151 367 2,132
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 117 324 3,046
2-4 a.m. 13 48 287
4-6 a.m. 476 548 1,238
6-8 a.m. 137 393 8,013
8-10 a.m. 756 2,032 18,068
10-12 a.m. 1,241 3,665 33,548
12-2 p.m. 1,228 3,747 30,336
2-4 p.m. 1,238 3,616 35,063
4-6 p.m. 948 2,814 28,607
6-8 p.m. 516 1,564 15,611
8-10 p.m. 419 1,134 12,732
10-12 p.m. 230 640 10,791
__________ __________ __________ _________________
Total: 7,319 20,525 197,340
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 15:02 13:04 14:12 13:32
Median 8:22 6:47 11:39 7:15
Total:
Average 15:02 13:04 14:12 13:32
Median 8:22 6:47 11:39 7:15
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.4
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 7,319 100%
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 861.8
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7785.0
Percent of searches completed with 0 results 21.2%
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 15,431 25.0%
DISPLAY (excluding automatic displays) 21,585 35.0%
BROWSE 625 1.0%
SELECT 180 0.3%
HELP 365 0.6%
EXPLAIN 308 0.5%
SAVE 4,019 6.5%
SET/RESET 3,958 6.4%
SHOW 202 0.3%
ADD-ON (AND, OR, AND NOT) 4,045 6.6%
LOGON or LOGOFF 8,185 13.3%
COMMENT 0 0.0%
OTHER 2,803 4.5%
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 6,143 28.3% 1,198 19.5% 11 102.5 754.3
TITLE WORD 2,922 13.5% 848 29.0% 10 525.4 3612.3
EXACT TITLE 129 0.6% 60 46.5% 1 27.7 181.8
JOURNAL 1,011 4.7% 276 27.3% 150 1879.8 5991.1
EXACT JOURNAL 262 1.2% 68 26.0% 366 2065.8 3939.6
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 7,584 34.9% 1,424 18.8% 28 1326.7 8868.1
SUBJECT WORD 6 0.0% 5 83.3% 10 10.0 0.0
SUBJECT 490 2.3% 186 38.0% 187 4255.1 12830.7
MAJOR SUBJECT 39 0.2% 0 0.0% 308 2614.6 5784.0
EXACT SUBJECT 320 1.5% 63 19.7% 75 1901.3 7781.3
MAJOR XS 68 0.3% 6 8.8% 155 2350.5 8392.9
EXPLODE XS 62 0.3% 8 12.9% 62 12174.0 68508.0
EXPLODE MAJOR 49 0.2% 6 12.2% 496 13902.8 33661.9
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 938 4.3% 131 14.0% 14 466.3 3660.8
LANGUAGE 422 1.9% 20 4.7% 79 964.1 0.0
PUB TYPE 617 2.8% 21 3.4% 32 318.1 1720.4
Other indexes 931 4.3% 483 51.9% 1 3134.4 24011.5
By number of indexes:
Multiple 6,343 32.6% 1,291 20.4% 10 448.4 3801.2
Single 13,093 67.4% 2,913 22.2% 30 1507.8 10672.9
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 7 1.1% 1 14.3% 3 59.3 97.1
JOURNAL 125 20.3% 23 18.4% 1 2.8 3.7
EXACT JOURNAL 19 3.1% 1 5.3% 1 3.5 4.1
SUBJECT 442 71.6% 112 25.3% 2 32.0 167.0
EXACT SUBJECT 24 3.9% 1 4.2% 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 617 100% 138 22.4% 1 23.6 139.7
LIMITS:
Number of times limits (bit strings) used: 1,215
Use by bit string (percentage):
Current year minus 5 16.6%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.3%
Current year minus 1 0.2%
Current year 0.2%
English Language 37.3%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.7%
XS Animal 1.3%
XS Case Report 0.2%
XS Child 1.0%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 9.8%
XS Infant 0.0%
XS Infant, Newborn 0.6%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.3%
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 25.8%
PT Journal Article 1.0%
SUBSET AIM 1.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,462
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.9%
Percentage of ORs 4.0%
Percentage of AND NOTs 2.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
BRIEF 61.5%
LONG 1.0%
MEDLINE 1.4%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.8%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.3%
Other 26.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.8%
Ten most frequent errors:
1. NS command - no next screen 34.5%
2. First word of command is invalid 27.7%
3. DISPLAY command - no FIND results 8.3%
4. FIND command with invalid index name 5.7%
5. DISPLAY command contains invalid word 4.0%
6. Search term missing from search command 1.8%
7. PS command - no previous screen 1.8%
8. Add-on search with invalid index name 1.7%
9. Valid command at an inappropriate time 1.3%
10. DISPLAY command-record numbers too large 0.9%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 14.6%
2. BOOKS DATABASE 12.3%
3. FIND 8.1%
4. MEDLINE BACKFILES 5.8%
5. COMMANDS 5.2%
6. DATABASES 4.9%
7. Unrecognized term 3.6%
8. ADD-ON SEARCH 3.6%
9. INDEXES 3.6%
10. 3318 2.9%
11. All others 31.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.3%
2. First word of command is invalid 16.9%
3. FIND command with invalid index name 6.8%
4. DISPLAY command-first of >1 screen 5.6%
5. DISPLAY command - middle of >1 screen 5.2%
6. FIND command retrieves >1 book 4.8%
7. NS command - no next screen 3.0%
8. DISPLAY command - last of >1 screen 2.8%
9. FIND command with zero results 2.5%
10. NS of SHOW/EXP command-no next screen 2.5%
11. All others 35.4%
Ten most frequent SHOW requests:
1. HISTORY 60.9%
2. SEARCH 21.1%
3. MAIL STATUS 4.7%
4. MEDLINE NEWS 3.9%
5. SETTINGS 3.1%
6. MEDLINE GLOSSARY 1.6%
7. EXPERIMENTS 0.8%
8. MAIL SETTINGS 0.8%
9. 2292 0.8%
10. MEDLINE LOADING STATISTICS 0.8%
11. All others 1.6%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)