MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/13/01 through 01/19/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 124 599 723
Davis 56 742 88 886
Irvine 0 341 0 341
Los Angeles 0 153 189 342
Riverside 0 10 55 65
San Diego 105 554 33 692
San Francisco 130 0 1,404 1,534
Santa Barbara 0 28 44 72
Santa Cruz 18 3 62 83
Stanford 352
Other (including DLA) 0 0 2,001 2,001
_______________ _________ _________ _________
Total: 309 1,955 4,475 7,091
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,113 16,081 198,317
MED90 database 903 2,100 14,035
MED85 database 456 869 6,239
MED80 database 302 535 2,856
MED75 database 180 313 1,369
MED66 database 137 312 1,541
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 46 145 904
2-4 a.m. 22 66 1,031
4-6 a.m. 122 178 1,166
6-8 a.m. 170 571 5,056
8-10 a.m. 810 2,398 24,492
10-12 a.m. 1,353 3,623 34,474
12-2 p.m. 1,196 3,114 32,382
2-4 p.m. 1,432 4,336 66,060
4-6 p.m. 1,057 3,074 32,903
6-8 p.m. 439 1,275 11,779
8-10 p.m. 261 719 8,835
10-12 p.m. 183 711 5,275
__________ __________ __________ _________________
Total: 7,091 20,210 224,357
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 19:09 14:39 13:56 14:27
Median 10:57 8:15 12:43 8:32
Total:
Average 19:09 14:39 13:56 14:27
Median 10:57 8:15 12:43 8:32
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.9
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 7,091 100%
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 844.7
Retrievals per search - median 9.0
Retrievals per search - standard deviation 6867.3
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.3%
Percent of long searches completed 59.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 15,477 24.3%
DISPLAY (excluding automatic displays) 23,154 36.4%
BROWSE 397 0.6%
SELECT 230 0.4%
HELP 320 0.5%
EXPLAIN 316 0.5%
SAVE 5,347 8.4%
SET/RESET 3,478 5.5%
SHOW 272 0.4%
ADD-ON (AND, OR, AND NOT) 3,918 6.2%
LOGON or LOGOFF 7,917 12.4%
COMMENT 0 0.0%
OTHER 2,843 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 6,552 29.9% 1,429 21.8% 12 102.1 588.5
TITLE WORD 2,358 10.8% 817 34.6% 9 348.6 3245.2
EXACT TITLE 142 0.6% 65 45.8% 1 13.5 40.6
JOURNAL 887 4.1% 270 30.4% 67 1608.5 6481.4
EXACT JOURNAL 286 1.3% 96 33.6% 141 1948.7 3878.9
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 7,958 36.4% 1,425 17.9% 33 1486.2 8870.4
SUBJECT WORD 11 0.1% 6 54.5% 199 4700.2 9842.9
SUBJECT 501 2.3% 145 28.9% 480 5648.5 19077.3
MAJOR SUBJECT 50 0.2% 6 12.0% 373 2969.3 7609.3
EXACT SUBJECT 392 1.8% 106 27.0% 142 1909.4 6705.2
MAJOR XS 97 0.4% 17 17.5% 311 1093.4 1725.2
EXPLODE XS 102 0.5% 31 30.4% 191 16060.7 48805.1
EXPLODE MAJOR 30 0.1% 0 0.0% 158 10223.8 34044.3
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 951 4.3% 186 19.6% 22 227.2 1159.9
LANGUAGE 712 3.3% 54 7.6% 65 666.0 0.0
PUB TYPE 389 1.8% 28 7.2% 35 594.4 2959.9
Other indexes 460 2.1% 48 10.4% 1 10.4 111.7
By number of indexes:
Multiple 6,397 33.1% 1,373 21.5% 15 596.0 5997.2
Single 12,943 66.9% 2,662 20.6% 28 1362.1 8616.8
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 8 2.1% 1 12.5% 1 15.1 29.8
JOURNAL 76 19.5% 14 18.4% 1 43.0 284.0
EXACT JOURNAL 14 3.6% 1 7.1% 1 1.1 0.3
SUBJECT 268 68.9% 48 17.9% 3 39.8 342.1
EXACT SUBJECT 23 5.9% 3 13.0% 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 389 100% 67 17.2% 2 35.9 308.8
LIMITS:
Number of times limits (bit strings) used: 1,620
Use by bit string (percentage):
Current year minus 5 17.5%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.3%
Current year minus 1 0.1%
Current year 0.2%
English Language 44.3%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.2%
XS Adult 0.4%
XS Aged 1.2%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.6%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.0%
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 21.1%
PT Journal Article 0.2%
SUBSET AIM 2.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 7,613
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.8%
Percentage of ORs 4.1%
Percentage of AND NOTs 2.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 62.1%
LONG 0.9%
MEDLINE 0.8%
FIELDS 4.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.6%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 40.6%
2. First word of command is invalid 25.9%
3. FIND command with invalid index name 5.5%
4. DISPLAY command contains invalid word 4.2%
5. Valid command at an inappropriate time 1.7%
6. PS command - no previous screen 1.7%
7. DISPLAY command - no FIND results 1.6%
8. Add-on search with invalid index name 1.6%
9. Search term missing from search command 1.5%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.3%
2. MEDLINE BACKFILES 9.8%
3. FIND 9.5%
4. LOCATE (article dbs w/o monographs) 8.9%
5. Unrecognized term 6.0%
6. DATABASES 6.0%
7. COMMANDS 4.7%
8. INDEXES 4.1%
9. MAIL 3.8%
10. DATES INDEX 3.2%
11. All others 30.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.1%
2. First word of command is invalid 15.4%
3. DISPLAY command-first of >1 screen 6.0%
4. FIND command with invalid index name 5.3%
5. FIND command retrieves >1 book 3.8%
6. DISPLAY command - middle of >1 screen 3.5%
7. DISPLAY command - last of >1 screen 3.5%
8. DISPLAY command-complete in one screen 3.1%
9. Add-on without index name 2.8%
10. NS command - no next screen 2.4%
11. All others 30.7%
Ten most frequent SHOW requests:
1. HISTORY 58.1%
2. SEARCH 26.6%
3. MAIL STATUS 6.4%
4. SETTINGS 2.0%
5. UPDATE 2.0%
6. MEDLINE GLOSSARY 1.5%
7. MEDLINE NEWS 1.0%
8. MAIL SETTINGS 0.5%
9. DISPLAY 0.5%
10. MEDLINE LOADING STATISTICS 0.5%
11. All others 1.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)