MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/13/01 through 10/19/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 55 432 487
Davis 22 331 50 403
Irvine 0 245 0 245
Los Angeles 0 14 77 91
Riverside 0 1 25 26
San Diego 76 319 12 407
San Francisco 67 0 822 889
Santa Barbara 0 3 11 14
Santa Cruz 0 5 40 45
Stanford 83
Other (including DLA) 0 0 1,731 1,731
_______________ _________ _________ _________
Total: 165 973 3,200 4,421
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,232 10,020 96,270
MED90 database 491 1,099 5,617
MED85 database 263 549 5,294
MED80 database 193 377 14,868
MED75 database 137 251 15,991
MED66 database 105 231 2,450
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 43 95 1,237
2-4 a.m. 8 16 45
4-6 a.m. 26 58 446
6-8 a.m. 125 395 3,442
8-10 a.m. 567 1,416 13,408
10-12 a.m. 795 2,220 23,080
12-2 p.m. 807 2,250 19,178
2-4 p.m. 978 2,763 24,883
4-6 p.m. 680 2,046 27,563
6-8 p.m. 233 803 7,961
8-10 p.m. 83 254 3,482
10-12 p.m. 76 211 15,765
__________ __________ __________ _________________
Total: 4,421 12,527 140,490
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 21:45 14:58 15:29 14:44
Median 11:57 10:41 13:16 10:34
Total:
Average 21:45 14:58 15:29 14:44
Median 11:57 10:41 13:16 10:34
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 1.8
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 4,421 100%
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 712.6
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6033.4
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.7%
Percent of long searches completed 78.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,267 25.3%
DISPLAY (excluding automatic displays) 12,617 34.5%
BROWSE 540 1.5%
SELECT 78 0.2%
HELP 173 0.5%
EXPLAIN 152 0.4%
SAVE 2,401 6.6%
SET/RESET 2,253 6.2%
SHOW 127 0.3%
ADD-ON (AND, OR, AND NOT) 2,573 7.0%
LOGON or LOGOFF 4,716 12.9%
COMMENT 0 0.0%
OTHER 1,671 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 4,143 31.0% 856 20.7% 12 108.4 666.6
TITLE WORD 1,736 13.0% 612 35.3% 7 625.9 5774.8
EXACT TITLE 91 0.7% 51 56.0% 1 56.3 197.9
JOURNAL 707 5.3% 236 33.4% 37 2014.8 6211.2
EXACT JOURNAL 203 1.5% 66 32.5% 274 1689.7 3528.4
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 4,260 31.9% 824 19.3% 33 1324.6 9450.5
SUBJECT WORD 18 0.1% 3 16.7% 14 657.4 2433.7
SUBJECT 314 2.3% 102 32.5% 56 4184.4 15330.1
MAJOR SUBJECT 18 0.1% 2 11.1% 142 3984.4 13695.1
EXACT SUBJECT 240 1.8% 38 15.8% 114 1394.1 3252.0
MAJOR XS 77 0.6% 10 13.0% 230 4730.2 11067.6
EXPLODE XS 59 0.4% 8 13.6% 774 7953.9 18395.4
EXPLODE MAJOR 23 0.2% 7 30.4% 684 4157.3 5476.6
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 855 6.4% 96 11.2% 9 122.1 371.8
LANGUAGE 286 2.1% 15 5.2% 67 425.9 0.0
PUB TYPE 537 4.0% 23 4.3% 39 276.6 1030.8
Other indexes 118 0.9% 13 11.0% 7 96.8 284.4
By number of indexes:
Multiple 4,063 34.4% 839 20.6% 10 296.3 3123.6
Single 7,742 65.6% 1,750 22.6% 32 1316.8 8350.6
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 1 0.2% 0 0.0% 1 1.0 0.0
JOURNAL 272 50.6% 126 46.3% 2 3.8 6.9
EXACT JOURNAL 4 0.7% 1 25.0% 1 1.0 0.0
SUBJECT 233 43.4% 53 22.7% 2 64.6 436.7
EXACT SUBJECT 27 5.0% 4 14.8% 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 537 100% 184 34.3% 2 34.6 313.0
LIMITS:
Number of times limits (bit strings) used: 941
Use by bit string (percentage):
Current year minus 5 30.4%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.4%
Current year minus 1 0.2%
Current year 0.4%
English Language 30.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.5%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 1.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 9.7%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.3%
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 18.9%
PT Journal Article 0.0%
SUBSET AIM 3.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 2.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,643
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.9%
Percentage of ORs 2.5%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
BRIEF 61.3%
LONG 0.7%
MEDLINE 0.6%
FIELDS 4.1%
PERIODICALS 0.0%
BROWSE REVIEW 2.2%
BROWSE LONG 1.0%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.6%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 39.2%
2. First word of command is invalid 25.7%
3. FIND command with invalid index name 7.3%
4. DISPLAY command contains invalid word 4.2%
5. Search term missing from search command 2.2%
6. PS command - no previous screen 2.1%
7. Add-on search with invalid index name 1.8%
8. 1185 1.7%
9. DISPLAY command - no FIND results 1.5%
10. Command containing escape or arrow key 1.1%
11. All others 13.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 22.4%
2. LOCATE (article dbs w/o monographs) 21.7%
3. FIND 12.5%
4. MEDLINE BACKFILES 5.9%
5. Unrecognized term 4.6%
6. DATABASES 3.9%
7. MAIL 2.6%
8. INDEXES 2.6%
9. 0025 2.0%
10. DISPLAY 2.0%
11. All others 24.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.4%
2. First word of command is invalid 18.8%
3. DISPLAY command-first of >1 screen 8.6%
4. FIND command with invalid index name 6.2%
5. DISPLAY command - middle of >1 screen 4.9%
6. FIND command with zero results 3.4%
7. FIND command retrieves >1 book 3.1%
8. NS command - no next screen 2.5%
9. DISPLAY command-complete in one screen 2.5%
10. Add-on without index name 2.2%
11. All others 19.7%
Ten most frequent SHOW requests:
1. HISTORY 76.5%
2. SEARCH 7.1%
3. MAIL STATUS 6.1%
4. MEDLINE NEWS 5.1%
5. MEDLINE GLOSSARY 3.1%
6. MELVYL 1.0%
7. MAIL SETTINGS 1.0%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)