MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/01/01 through 09/07/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 48 398 446
Davis 40 385 33 458
Irvine 0 274 0 274
Los Angeles 0 8 97 105
Riverside 0 4 41 45
San Diego 65 335 7 407
San Francisco 46 0 850 896
Santa Barbara 0 2 9 11
Santa Cruz 0 2 47 49
Stanford 56
Other (including DLA) 0 0 1,563 1,563
_______________ _________ _________ _________
Total: 151 1,058 3,045 4,310
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,141 9,218 105,874
MED90 database 497 1,026 5,561
MED85 database 271 520 2,355
MED80 database 197 402 2,773
MED75 database 114 202 1,046
MED66 database 90 221 1,103
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 32 118 1,160
2-4 a.m. 18 62 1,448
4-6 a.m. 34 93 1,595
6-8 a.m. 99 195 1,421
8-10 a.m. 506 1,390 12,747
10-12 a.m. 934 2,351 21,110
12-2 p.m. 714 1,981 19,702
2-4 p.m. 858 2,316 24,768
4-6 p.m. 590 1,558 16,948
6-8 p.m. 269 798 8,694
8-10 p.m. 142 367 4,577
10-12 p.m. 114 360 4,542
__________ __________ __________ _________________
Total: 4,310 11,589 118,712
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 22:48 13:44 26:36 13:57
Median 13:39 8:04 19:27 8:42
Total:
Average 22:48 13:44 26:36 13:57
Median 13:39 8:04 19:27 8:42
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.6
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 4,310 100%
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 2.7
Retrievals per search - average 1094.0
Retrievals per search - median 9.0
Retrievals per search - standard deviation 12251.3
Percent of searches completed with 0 results 20.6%
Percent of searches entered that are long 0.4%
Percent of long searches completed 71.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 8,504 24.1%
DISPLAY (excluding automatic displays) 12,669 35.9%
BROWSE 232 0.7%
SELECT 62 0.2%
HELP 198 0.6%
EXPLAIN 139 0.4%
SAVE 2,307 6.5%
SET/RESET 2,178 6.2%
SHOW 135 0.4%
ADD-ON (AND, OR, AND NOT) 2,640 7.5%
LOGON or LOGOFF 4,579 13.0%
COMMENT 1 0.0%
OTHER 1,620 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 3,560 28.7% 780 21.9% 12 139.2 1095.9
TITLE WORD 1,809 14.6% 573 31.7% 8 923.3 5286.0
EXACT TITLE 72 0.6% 27 37.5% 1 11.0 40.0
JOURNAL 672 5.4% 181 26.9% 154 1973.0 5785.7
EXACT JOURNAL 258 2.1% 89 34.5% 367 1616.7 2830.4
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 4,085 32.9% 758 18.6% 28 1328.4 10704.1
SUBJECT WORD 8 0.1% 3 37.5% 67 105.2 104.3
SUBJECT 309 2.5% 96 31.1% 596 8494.8 19867.2
MAJOR SUBJECT 35 0.3% 5 14.3% 994 6256.2 14738.0
EXACT SUBJECT 186 1.5% 29 15.6% 124 2816.3 7693.9
MAJOR XS 21 0.2% 2 9.5% 143 5987.7 10929.2
EXPLODE XS 43 0.3% 6 14.0% 1,138 59883.2 168180
EXPLODE MAJOR 49 0.4% 15 30.6% 230 14198.8 28019.1
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 696 5.6% 94 13.5% 18 195.7 754.5
LANGUAGE 254 2.0% 12 4.7% 104 2807.3 0.0
PUB TYPE 228 1.8% 6 2.6% 47 3083.3 8723.6
Other indexes 151 1.2% 19 12.6% 1 33.9 240.6
By number of indexes:
Multiple 3,970 35.7% 849 21.4% 11 1348.2 16997.8
Single 7,154 64.3% 1,466 20.5% 35 1478.3 12082.4
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 5 2.2% 1 20.0% 13 52.8 87.2
JOURNAL 30 13.2% 8 26.7% 1 12.6 24.1
EXACT JOURNAL 5 2.2% 2 40.0% 2 1.7 0.6
SUBJECT 184 80.7% 49 26.6% 2 132.3 1001.4
EXACT SUBJECT 4 1.8% 3 75.0% 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 228 100% 63 27.6% 2 111.3 906.5
LIMITS:
Number of times limits (bit strings) used: 773
Use by bit string (percentage):
Current year minus 5 26.5%
Current year minus 4 0.0%
Current year minus 3 2.2%
Current year minus 2 0.5%
Current year minus 1 0.3%
Current year 0.5%
English Language 33.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.4%
XS Adult 0.1%
XS Aged 0.1%
XS Animal 0.6%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 12.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 2.1%
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 19.1%
PT Journal Article 0.0%
SUBSET AIM 0.5%
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: 4,552
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.1%
Percentage of ORs 5.4%
Percentage of AND NOTs 2.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
BRIEF 61.8%
LONG 0.6%
MEDLINE 1.1%
FIELDS 2.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 28.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 40.5%
2. First word of command is invalid 23.6%
3. FIND command with invalid index name 7.0%
4. DISPLAY command contains invalid word 3.7%
5. Add-on search with invalid index name 2.3%
6. Search term missing from search command 2.0%
7. Valid command at an inappropriate time 1.9%
8. PS command - no previous screen 1.6%
9. DISPLAY command - no FIND results 1.3%
10. DISPLAY command-record numbers too large 1.3%
11. All others 14.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 20.1%
2. BOOKS DATABASE 13.7%
3. FIND 9.4%
4. MEDLINE BACKFILES 8.6%
5. COMMANDS 7.9%
6. DATABASES 5.0%
7. 1752 2.9%
8. INDEXES 2.9%
9. Unrecognized term 2.2%
10. G100 1.4%
11. All others 23.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 28.5%
2. First word of command is invalid 12.2%
3. FIND command with invalid index name 7.4%
4. DISPLAY command-first of >1 screen 7.4%
5. NS command - no next screen 3.9%
6. DISPLAY command - middle of >1 screen 3.9%
7. DISPLAY command - last of >1 screen 3.9%
8. 848 3.9%
9. FIND command retrieves >1 book 3.6%
10. Add-on without index name 2.4%
11. All others 25.9%
Ten most frequent SHOW requests:
1. HISTORY 66.2%
2. MAIL STATUS 14.1%
3. SEARCH 7.0%
4. SETTINGS 4.2%
5. MAIL SETTINGS 2.8%
6. UPDATE 2.8%
7. UCSF PASSWORDS 1.4%
8. DISPLAY 1.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)