MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/06/01 through 10/12/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 61 376 437
Davis 18 350 57 425
Irvine 0 267 0 267
Los Angeles 0 38 76 114
Riverside 0 3 49 52
San Diego 74 351 4 429
San Francisco 71 0 799 870
Santa Barbara 0 1 19 20
Santa Cruz 0 8 57 65
Stanford 63
Other (including DLA) 0 0 1,646 1,646
_______________ _________ _________ _________
Total: 163 1,079 3,083 4,388
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,271 9,737 100,625
MED90 database 494 1,217 5,233
MED85 database 274 569 2,353
MED80 database 161 306 1,449
MED75 database 99 181 505
MED66 database 89 194 1,112
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 33 133 1,255
2-4 a.m. 8 27 271
4-6 a.m. 10 20 536
6-8 a.m. 87 212 2,150
8-10 a.m. 690 2,003 11,401
10-12 a.m. 874 2,329 24,275
12-2 p.m. 761 1,970 18,028
2-4 p.m. 948 2,548 18,823
4-6 p.m. 598 1,819 21,962
6-8 p.m. 175 531 5,791
8-10 p.m. 142 392 4,555
10-12 p.m. 62 220 2,230
__________ __________ __________ _________________
Total: 4,388 12,204 111,277
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 21:03 14:59 14:07 15:13
Median 12:05 9:50 10:57 10:16
Total:
Average 21:03 14:59 14:07 15:13
Median 12:05 9:50 10:57 10:16
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 3.0
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 4,388 100%
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 666.7
Retrievals per search - median 8.0
Retrievals per search - standard deviation 4485.2
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.3%
Percent of long searches completed 80.0%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 8,682 24.6%
DISPLAY (excluding automatic displays) 12,107 34.4%
BROWSE 298 0.8%
SELECT 75 0.2%
HELP 191 0.5%
EXPLAIN 146 0.4%
SAVE 2,219 6.3%
SET/RESET 2,273 6.5%
SHOW 138 0.4%
ADD-ON (AND, OR, AND NOT) 2,800 7.9%
LOGON or LOGOFF 4,596 13.0%
COMMENT 0 0.0%
OTHER 1,699 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 3,727 29.5% 740 19.9% 12 124.7 791.4
TITLE WORD 1,836 14.5% 632 34.4% 5 293.3 1496.5
EXACT TITLE 47 0.4% 23 48.9% 2 559.0 1724.8
JOURNAL 660 5.2% 186 28.2% 403 2493.3 7367.9
EXACT JOURNAL 269 2.1% 97 36.1% 680 2574.0 5038.2
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 4,193 33.2% 760 18.1% 29 1188.5 6012.5
SUBJECT WORD 7 0.1% 1 14.3% 618 582.2 184.1
SUBJECT 292 2.3% 126 43.1% 200 4929.0 16046.7
MAJOR SUBJECT 16 0.1% 1 6.3% 421 673.5 1069.3
EXACT SUBJECT 167 1.3% 30 18.0% 95 2026.2 7720.5
MAJOR XS 11 0.1% 5 45.5% 155 239.0 290.0
EXPLODE XS 21 0.2% 2 9.5% 10,780 21995.5 33319.6
EXPLODE MAJOR 2 0.0% 0 0.0% 78,023 78023.0 110033
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 820 6.5% 106 12.9% 17 139.0 506.5
LANGUAGE 214 1.7% 11 5.1% 72 931.9 0.0
PUB TYPE 292 2.3% 6 2.1% 63 887.5 5688.5
Other indexes 192 1.5% 29 15.1% 1 221.5 1396.8
By number of indexes:
Multiple 3,945 34.4% 875 22.2% 9 317.1 3930.5
Single 7,514 65.6% 1,559 20.7% 32 1196.8 5710.6
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 11 3.8% 2 18.2% 22 30.0 30.6
JOURNAL 47 16.1% 9 19.1% 2 4.7 6.6
EXACT JOURNAL 4 1.4% 1 25.0% 1 1.0 0.0
SUBJECT 219 75.0% 42 19.2% 2 7.7 13.5
EXACT SUBJECT 11 3.8% 3 27.3% 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 292 100% 57 19.5% 2 7.8 14.1
LIMITS:
Number of times limits (bit strings) used: 735
Use by bit string (percentage):
Current year minus 5 35.8%
Current year minus 4 0.0%
Current year minus 3 1.4%
Current year minus 2 0.1%
Current year minus 1 1.6%
Current year 1.0%
English Language 28.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 2.6%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 7.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.0%
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 17.3%
PT Journal Article 0.0%
SUBSET AIM 2.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,447
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.7%
Percentage of ORs 2.3%
Percentage of AND NOTs 0.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
BRIEF 60.7%
LONG 0.9%
MEDLINE 0.6%
FIELDS 4.0%
PERIODICALS 0.0%
BROWSE REVIEW 1.5%
BROWSE LONG 0.8%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 28.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. NS command - no next screen 40.7%
2. First word of command is invalid 25.2%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 3.7%
5. Add-on search with invalid index name 2.1%
6. Search term missing from search command 2.1%
7. PS command - no previous screen 1.9%
8. Valid command at an inappropriate time 1.3%
9. NS of SHOW/EXP command-no next screen 1.2%
10. 1185 1.1%
11. All others 13.9%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 17.1%
2. BOOKS DATABASE 16.4%
3. FIND 11.6%
4. MEDLINE BACKFILES 7.5%
5. Unrecognized term 6.2%
6. COMMANDS 4.8%
7. MAIL 4.1%
8. ADD-ON SEARCH 4.1%
9. INDEXES 4.1%
10. DATABASES 2.1%
11. All others 22.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.8%
2. First word of command is invalid 14.5%
3. DISPLAY command-first of >1 screen 9.2%
4. DISPLAY command - middle of >1 screen 9.2%
5. FIND command with invalid index name 5.3%
6. FIND command retrieves >1 book 5.0%
7. NS command - no next screen 3.9%
8. DISPLAY command - last of >1 screen 3.3%
9. NS of SHOW/EXP command-no next screen 3.3%
10. 14 1.5%
11. All others 21.9%
Ten most frequent SHOW requests:
1. HISTORY 65.6%
2. MAIL STATUS 14.8%
3. SEARCH 10.9%
4. SETTINGS 3.9%
5. MEDLINE NEWS 2.3%
6. MAIL SETTINGS 0.8%
7. DISPLAY 0.8%
8. FIND DISPLAY 0.8%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)