MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/23/01 through 06/29/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 65 463 528
Davis 26 539 40 605
Irvine 0 312 0 312
Los Angeles 0 3 86 89
Riverside 0 9 65 74
San Diego 112 403 27 542
San Francisco 66 0 1,045 1,111
Santa Barbara 0 0 16 16
Santa Cruz 6 1 54 61
Stanford 223
Other (including DLA) 0 0 1,959 1,959
_______________ _________ _________ _________
Total: 210 1,332 3,755 5,520
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,021 12,142 165,383
MED90 database 665 1,587 8,729
MED85 database 342 712 3,214
MED80 database 242 526 3,595
MED75 database 152 298 1,791
MED66 database 98 261 3,678
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 50 163 1,479
2-4 a.m. 33 102 950
4-6 a.m. 54 123 1,659
6-8 a.m. 175 509 4,653
8-10 a.m. 604 1,697 15,455
10-12 a.m. 1,143 3,080 28,056
12-2 p.m. 880 2,416 22,920
2-4 p.m. 1,149 3,352 73,812
4-6 p.m. 813 2,204 20,850
6-8 p.m. 344 1,017 9,104
8-10 p.m. 164 589 4,827
10-12 p.m. 111 274 2,625
__________ __________ __________ _________________
Total: 5,520 15,526 186,390
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 14:58 13:52 15:25 14:13
Median 10:47 9:05 13:31 9:29
Total:
Average 14:58 13:52 15:25 14:13
Median 10:47 9:05 13:31 9:29
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.3
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 5,520 100%
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 1167.2
Retrievals per search - median 8.0
Retrievals per search - standard deviation 10171.7
Percent of searches completed with 0 results 21.3%
Percent of searches entered that are long 0.5%
Percent of long searches completed 59.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,587 25.9%
DISPLAY (excluding automatic displays) 15,347 34.3%
BROWSE 578 1.3%
SELECT 117 0.3%
HELP 243 0.5%
EXPLAIN 247 0.6%
SAVE 2,400 5.4%
SET/RESET 2,626 5.9%
SHOW 175 0.4%
ADD-ON (AND, OR, AND NOT) 3,157 7.1%
LOGON or LOGOFF 6,124 13.7%
COMMENT 0 0.0%
OTHER 2,165 4.8%
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 5,395 33.0% 1,141 21.1% 13 122.9 766.4
TITLE WORD 2,032 12.4% 729 35.9% 7 361.7 2132.9
EXACT TITLE 107 0.7% 62 57.9% 1 31.5 182.1
JOURNAL 819 5.0% 265 32.4% 271 2914.6 10451.9
EXACT JOURNAL 342 2.1% 61 17.8% 1,642 21390.3 36964.3
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 5,350 32.8% 956 17.9% 31 1780.4 15058.9
SUBJECT WORD 9 0.1% 4 44.4% 247 802.2 1087.5
SUBJECT 391 2.4% 118 30.2% 76 2579.0 7440.1
MAJOR SUBJECT 28 0.2% 4 14.3% 145 999.3 1991.1
EXACT SUBJECT 244 1.5% 64 26.2% 90 1593.4 4141.2
MAJOR XS 29 0.2% 2 6.9% 160 2653.6 5774.7
EXPLODE XS 79 0.5% 21 26.6% 437 3934.3 8952.0
EXPLODE MAJOR 3 0.0% 1 33.3% 8,100 8099.5 11450.2
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 848 5.2% 135 15.9% 14 166.3 614.3
LANGUAGE 279 1.7% 13 4.7% 73 801.1 0.0
PUB TYPE 575 3.5% 18 3.1% 31 193.8 529.2
Other indexes 179 1.1% 21 11.7% 1 59.6 148.6
By number of indexes:
Multiple 4,903 33.4% 1,095 22.3% 11 1715.4 11568.5
Single 9,795 66.6% 2,083 21.3% 31 1490.5 11859.8
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 4 0.7% 0 0.0% 8 7.8 4.1
JOURNAL 82 14.3% 14 17.1% 1 10.2 38.3
EXACT JOURNAL 15 2.6% 3 20.0% 2 1.8 0.8
SUBJECT 463 80.5% 123 26.6% 1 7.0 16.9
EXACT SUBJECT 11 1.9% 2 18.2% 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 575 100% 142 24.7% 1 7.2 21.3
LIMITS:
Number of times limits (bit strings) used: 936
Use by bit string (percentage):
Current year minus 5 27.5%
Current year minus 4 0.0%
Current year minus 3 1.9%
Current year minus 2 0.1%
Current year minus 1 0.5%
Current year 0.5%
English Language 31.5%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.0%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 1.5%
XS Human 9.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.7%
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 18.4%
PT Journal Article 0.0%
SUBSET AIM 3.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 3.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 5,688
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.6%
Percentage of ORs 4.3%
Percentage of AND NOTs 2.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
BRIEF 60.7%
LONG 1.2%
MEDLINE 1.1%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 2.4%
BROWSE LONG 1.1%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.6%
Other 26.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. NS command - no next screen 41.1%
2. First word of command is invalid 24.6%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 4.5%
5. PS command - no previous screen 2.5%
6. DISPLAY command - no FIND results 1.8%
7. Add-on search with invalid index name 1.7%
8. Search term missing from search command 1.6%
9. Command containing escape or arrow key 1.0%
10. DISPLAY command-record numbers too large 0.8%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.8%
2. LOCATE (article dbs w/o monographs) 11.3%
3. FIND 8.1%
4. DISPLAY 7.7%
5. MEDLINE BACKFILES 7.3%
6. DATABASES 4.5%
7. Unrecognized term 3.6%
8. ADD-ON SEARCH 3.6%
9. INDEXES 3.6%
10. COMMANDS 3.6%
11. All others 27.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.2%
2. First word of command is invalid 14.7%
3. DISPLAY command-first of >1 screen 8.6%
4. FIND command with invalid index name 7.3%
5. FIND command retrieves >1 book 5.3%
6. DISPLAY command - middle of >1 screen 5.1%
7. NS command - no next screen 2.9%
8. FIND command with zero results 2.9%
9. 14 2.4%
10. 848 2.4%
11. All others 30.8%
Ten most frequent SHOW requests:
1. HISTORY 79.3%
2. SEARCH 8.1%
3. MAIL STATUS 4.5%
4. DATABASES 2.7%
5. MEDLINE GLOSSARY 1.8%
6. UPDATE 1.8%
7. SETTINGS 0.9%
8. MEDLINE NEWS 0.9%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)