MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/12/01 through 05/18/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 104 464 568
Davis 18 634 68 720
Irvine 0 497 0 497
Los Angeles 0 19 200 219
Riverside 0 26 47 73
San Diego 103 486 51 640
San Francisco 88 0 1,212 1,300
Santa Barbara 0 3 25 28
Santa Cruz 7 3 79 89
Stanford 277
Other (including DLA) 0 0 2,063 2,063
_______________ _________ _________ _________
Total: 216 1,772 4,209 6,474
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,623 14,701 207,336
MED90 database 799 1,693 35,578
MED85 database 424 762 31,518
MED80 database 305 624 25,580
MED75 database 166 330 22,539
MED66 database 157 351 36,056
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 117 298 1,866
2-4 a.m. 68 160 2,432
4-6 a.m. 55 104 769
6-8 a.m. 118 307 5,923
8-10 a.m. 788 2,344 124,947
10-12 a.m. 1,224 3,641 36,174
12-2 p.m. 1,059 2,915 45,727
2-4 p.m. 1,219 3,505 39,101
4-6 p.m. 970 2,695 45,668
6-8 p.m. 419 1,162 41,734
8-10 p.m. 267 754 8,720
10-12 p.m. 170 576 5,546
__________ __________ __________ _________________
Total: 6,474 18,461 358,607
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 14:32 13:38 24:45 14:01
Median 8:51 9:01 14:00 9:01
Total:
Average 14:32 13:38 24:45 14:01
Median 8:51 9:01 14:00 9:01
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.5
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 6,474 100%
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 877.7
Retrievals per search - median 8.0
Retrievals per search - standard deviation 9642.2
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 54.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,084 25.9%
DISPLAY (excluding automatic displays) 19,087 35.1%
BROWSE 283 0.5%
SELECT 188 0.3%
HELP 281 0.5%
EXPLAIN 272 0.5%
SAVE 3,615 6.6%
SET/RESET 3,079 5.7%
SHOW 168 0.3%
ADD-ON (AND, OR, AND NOT) 3,385 6.2%
LOGON or LOGOFF 7,294 13.4%
COMMENT 1 0.0%
OTHER 2,685 4.9%
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 6,140 30.9% 1,277 20.8% 11 105.1 704.1
TITLE WORD 2,448 12.3% 825 33.7% 7 509.2 4509.9
EXACT TITLE 132 0.7% 73 55.3% 1 32.0 130.6
JOURNAL 975 4.9% 331 33.9% 34 2809.4 10621.8
EXACT JOURNAL 353 1.8% 65 18.4% 286 2314.8 4645.8
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 6,808 34.3% 1,222 17.9% 27 1396.4 14549.2
SUBJECT WORD 17 0.1% 4 23.5% 13 615.5 1336.3
SUBJECT 497 2.5% 170 34.2% 270 7418.8 30689.4
MAJOR SUBJECT 53 0.3% 7 13.2% 383 4958.4 11782.8
EXACT SUBJECT 211 1.1% 34 16.1% 65 2687.2 11295.4
MAJOR XS 40 0.2% 2 5.0% 153 2352.4 5191.0
EXPLODE XS 92 0.5% 14 15.2% 295 12373.2 24823.1
EXPLODE MAJOR 17 0.1% 1 5.9% 31 1592.4 3272.4
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 1,185 6.0% 187 15.8% 9 251.9 1113.8
LANGUAGE 295 1.5% 11 3.7% 80 599.0 0.0
PUB TYPE 281 1.4% 12 4.3% 31 558.3 2855.0
Other indexes 327 1.6% 43 13.1% 1 351.2 2568.8
By number of indexes:
Multiple 5,656 32.5% 1,223 21.6% 10 441.8 4157.5
Single 11,760 67.5% 2,407 20.5% 28 1510.8 13183.9
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 17 6.0% 2 11.8% 2 15.1 22.1
JOURNAL 118 42.0% 20 16.9% 1 6.1 16.1
EXACT JOURNAL 4 1.4% 1 25.0% 1 1.0 0.0
SUBJECT 126 44.8% 34 27.0% 3 20.9 141.1
EXACT SUBJECT 16 5.7% 0 0.0% 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 281 100% 57 20.3% 1 12.3 91.3
LIMITS:
Number of times limits (bit strings) used: 1,056
Use by bit string (percentage):
Current year minus 5 29.2%
Current year minus 4 0.0%
Current year minus 3 1.2%
Current year minus 2 0.1%
Current year minus 1 0.9%
Current year 0.7%
English Language 30.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.5%
XS Adolescence 0.1%
XS Adult 0.0%
XS Aged 0.2%
XS Animal 0.0%
XS Case Report 0.1%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 10.0%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 1.5%
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 22.3%
PT Journal Article 0.0%
SUBSET AIM 1.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,684
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.5%
Percentage of ORs 3.8%
Percentage of AND NOTs 1.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
BRIEF 62.2%
LONG 0.9%
MEDLINE 1.1%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.1%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 43.0%
2. First word of command is invalid 24.0%
3. FIND command with invalid index name 6.7%
4. DISPLAY command contains invalid word 3.8%
5. Add-on search with invalid index name 2.0%
6. Search term missing from search command 1.8%
7. PS command - no previous screen 1.7%
8. Command containing escape or arrow key 1.3%
9. DISPLAY command - no FIND results 1.1%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.5%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 11.8%
2. LOCATE (article dbs w/o monographs) 10.3%
3. Unrecognized term 8.8%
4. FIND 8.8%
5. INDEXES 8.1%
6. MEDLINE BACKFILES 7.4%
7. COMMANDS 5.9%
8. DATABASES 3.3%
9. ADD-ON SEARCH 2.9%
10. LIMIT TO 2.6%
11. All others 30.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.2%
2. First word of command is invalid 17.0%
3. DISPLAY command-first of >1 screen 6.9%
4. FIND command with invalid index name 6.0%
5. DISPLAY command - middle of >1 screen 4.5%
6. FIND command retrieves >1 book 4.2%
7. DISPLAY command - last of >1 screen 3.4%
8. FIND command with zero results 2.9%
9. NS of SHOW/EXP command-no next screen 2.9%
10. NS command - no next screen 2.7%
11. All others 30.1%
Ten most frequent SHOW requests:
1. HISTORY 65.7%
2. SEARCH 13.3%
3. MAIL STATUS 6.7%
4. SETTINGS 4.8%
5. 5098 1.9%
6. MEDLINE GLOSSARY 1.0%
7. SYSTEM STATISTICS 1.0%
8. PUBLICATION TYPES 1.0%
9. MEDLINE STATISTICS 1.0%
10. MEDLINE NEWS 1.0%
11. All others 2.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)