MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/28/01 through 08/03/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 62 443 505
Davis 41 414 79 534
Irvine 0 308 0 308
Los Angeles 0 15 78 93
Riverside 0 6 19 25
San Diego 76 497 24 597
San Francisco 70 0 1,120 1,190
Santa Barbara 0 4 10 14
Santa Cruz 2 1 88 91
Stanford 229
Other (including DLA) 0 0 1,941 1,941
_______________ _________ _________ _________
Total: 189 1,307 3,802 5,527
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,955 13,147 137,790
MED90 database 719 1,625 8,896
MED85 database 361 689 3,380
MED80 database 219 370 2,856
MED75 database 147 306 1,230
MED66 database 126 301 1,394
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 84 214 1,887
2-4 a.m. 40 121 614
4-6 a.m. 52 165 1,909
6-8 a.m. 138 383 4,569
8-10 a.m. 702 2,030 17,958
10-12 a.m. 1,030 3,274 25,372
12-2 p.m. 932 2,742 21,363
2-4 p.m. 1,101 2,971 29,613
4-6 p.m. 803 2,286 25,789
6-8 p.m. 366 1,343 13,795
8-10 p.m. 180 601 7,221
10-12 p.m. 99 308 5,456
__________ __________ __________ _________________
Total: 5,527 16,438 155,546
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 22:40 14:08 16:35 14:23
Median 12:12 9:02 13:25 9:22
Total:
Average 22:40 14:08 16:35 14:23
Median 12:12 9:02 13:25 9:22
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 5,527 100%
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 3.0
Retrievals per search - average 1151.2
Retrievals per search - median 9.0
Retrievals per search - standard deviation 10392.5
Percent of searches completed with 0 results 19.9%
Percent of searches entered that are long 0.4%
Percent of long searches completed 64.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,964 25.7%
DISPLAY (excluding automatic displays) 16,313 35.0%
BROWSE 278 0.6%
SELECT 128 0.3%
HELP 206 0.4%
EXPLAIN 205 0.4%
SAVE 2,988 6.4%
SET/RESET 2,882 6.2%
SHOW 131 0.3%
ADD-ON (AND, OR, AND NOT) 3,734 8.0%
LOGON or LOGOFF 5,687 12.2%
COMMENT 0 0.0%
OTHER 2,089 4.5%
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 5,357 31.0% 1,042 19.4% 11 116.9 744.9
TITLE WORD 2,072 12.0% 688 33.2% 8 3204.8 19797.2
EXACT TITLE 210 1.2% 68 32.4% 1 18.2 107.4
JOURNAL 910 5.3% 236 25.9% 588 2877.1 6946.3
EXACT JOURNAL 302 1.7% 88 29.1% 1,035 2915.6 4530.3
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 5,695 32.9% 1,086 19.1% 29 1483.0 10909.5
SUBJECT WORD 6 0.0% 4 66.7% 1,978 1977.5 2608.5
SUBJECT 445 2.6% 139 31.2% 158 4611.8 37265.6
MAJOR SUBJECT 67 0.4% 4 6.0% 2,358 11652.9 18166.2
EXACT SUBJECT 174 1.0% 37 21.3% 168 2112.6 8063.4
MAJOR XS 43 0.2% 3 7.0% 129 1001.2 1984.3
EXPLODE XS 41 0.2% 2 4.9% 236 13840.5 43365.2
EXPLODE MAJOR 23 0.1% 4 17.4% 4,384 24389.1 52463.5
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 1,100 6.4% 143 13.0% 28 360.8 1956.2
LANGUAGE 372 2.1% 19 5.1% 95 535.9 0.0
PUB TYPE 277 1.6% 15 5.4% 32 372.6 1782.5
Other indexes 251 1.5% 36 14.3% 1 814.8 5866.8
By number of indexes:
Multiple 5,410 34.6% 1,059 19.6% 12 581.0 10230.5
Single 10,234 65.4% 2,105 20.6% 31 2006.6 12654.9
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 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 88 31.8% 14 15.9% 2 4.9 10.7
EXACT JOURNAL 12 4.3% 0 0.0% 1 1.5 1.0
SUBJECT 161 58.1% 47 29.2% 2 5.6 9.9
EXACT SUBJECT 16 5.8% 2 12.5% 1 8.6 15.0
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 277 100% 63 22.7% 2 5.3 10.3
LIMITS:
Number of times limits (bit strings) used: 1,142
Use by bit string (percentage):
Current year minus 5 29.4%
Current year minus 4 0.0%
Current year minus 3 0.6%
Current year minus 2 0.4%
Current year minus 1 0.6%
Current year 0.6%
English Language 36.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.7%
XS Adult 0.1%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.3%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 7.6%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 1.4%
XS Rats 0.4%
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 18.1%
PT Journal Article 0.1%
SUBSET AIM 2.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,235
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.2%
Percentage of ORs 4.6%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.8%
BRIEF 62.1%
LONG 1.4%
MEDLINE 1.0%
FIELDS 3.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.8%
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 40.7%
2. First word of command is invalid 25.5%
3. FIND command with invalid index name 5.8%
4. DISPLAY command contains invalid word 3.9%
5. Add-on search with invalid index name 2.3%
6. PS command - no previous screen 2.0%
7. Valid command at an inappropriate time 1.7%
8. Search term missing from search command 1.6%
9. DISPLAY command - no FIND results 1.3%
10. Command containing escape or arrow key 1.1%
11. All others 13.9%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 10.7%
2. FIND 10.7%
3. LOCATE (article dbs w/o monographs) 7.3%
4. Unrecognized term 6.8%
5. DATABASES 5.4%
6. INDEXES 5.4%
7. DISPLAY 4.4%
8. MEDLINE BACKFILES 4.4%
9. 3304 2.9%
10. COMMANDS 2.9%
11. All others 31.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.9%
2. First word of command is invalid 15.1%
3. FIND command with invalid index name 6.6%
4. DISPLAY command - middle of >1 screen 5.1%
5. DISPLAY command-first of >1 screen 4.4%
6. NS command - no next screen 4.1%
7. FIND command with zero results 3.6%
8. FIND command retrieves >1 book 3.6%
9. 848 2.7%
10. FIND command retrieves 1 book 2.4%
11. All others 39.0%
Ten most frequent SHOW requests:
1. HISTORY 79.1%
2. SEARCH 7.0%
3. MAIL STATUS 5.8%
4. SETTINGS 3.5%
5. MAIL SETTINGS 1.2%
6. MEDLINE GLOSSARY 1.2%
7. MEDLINE LOADING STATISTICS 1.2%
8. MEDLINE NEWS 1.2%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)