MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/01/99 through 06/30/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,131 5,430 6,561
Davis 230 5,934 1,498 7,662
Irvine 0 4,731 0 4,731
Los Angeles 0 3,589 2,286 5,875
Riverside 2 265 711 978
San Diego 992 4,271 723 5,986
San Francisco 626 0 14,216 14,842
Santa Barbara 0 216 455 671
Santa Cruz 297 89 614 1,000
Stanford 3,328
Other (including DLA) 0 0 14,556 14,556
_______________ _________ _________ _________
Total: 2,147 20,226 40,489 66,190
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 46,744 154,291 1,686,776
MED90 database 8,841 20,388 226,818
MED85 database 4,655 9,539 123,019
MED80 database 2,949 5,956 70,924
MED75 database 1,751 3,448 29,358
MED66 database 1,250 2,997 34,793
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 766 2,373 24,712
2-4 a.m. 314 850 7,150
4-6 a.m. 266 800 6,773
6-8 a.m. 1,404 3,837 73,926
8-10 a.m. 7,184 20,236 288,852
10-12 a.m. 12,580 37,044 350,000
12-2 p.m. 11,717 34,627 361,603
2-4 p.m. 13,735 40,814 388,358
4-6 p.m. 9,508 28,857 322,351
6-8 p.m. 4,360 13,186 160,428
8-10 p.m. 2,639 8,316 98,309
10-12 p.m. 1,717 5,679 89,226
__________ __________ __________ _________________
Total: 66,190 196,619 2,171,688
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 15:26 13:49 13:56 13:41
Median 10:48 8:46 9:07 8:33
Total:
Average 15:26 13:49 13:56 13:41
Median 10:48 8:46 9:07 8:33
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.0 3.2
transmission of response
Display - from receipt of command at DLA until 0.1 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 66,190 100%
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 608.0
Retrievals per search - median 9.0
Retrievals per search - standard deviation 5358.3
Percent of searches completed with 0 results 21.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed 47.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 153,903 25.8%
DISPLAY (excluding automatic displays) 217,541 36.4%
BROWSE 3,267 0.5%
SELECT 2,198 0.4%
HELP 5,650 0.9%
EXPLAIN 4,522 0.8%
SAVE 40,405 6.8%
SET/RESET 29,729 5.0%
SHOW 1,939 0.3%
ADD-ON (AND, OR, AND NOT) 36,159 6.1%
LOGON or LOGOFF 75,975 12.7%
COMMENT 10 0.0%
OTHER 26,209 4.4%
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 64,419 30.6% 12,859 20.0% 11 97.3 568.9
TITLE WORD 22,144 10.5% 6,969 31.5% 7 342.1 2111.5
EXACT TITLE 1,578 0.7% 753 47.7% 1 30.9 289.7
JOURNAL 8,704 4.1% 2,908 33.4% 113 2107.3 6605.6
EXACT JOURNAL 2,639 1.3% 852 32.3% 187 1151.4 2946.6
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 80,800 38.4% 15,316 19.0% 27 1101.3 8073.5
SUBJECT WORD 307 0.1% 159 51.8% 160 2997.3 9807.8
SUBJECT 6,507 3.1% 2,730 42.0% 176 2496.6 8161.7
MAJOR SUBJECT 424 0.2% 103 24.3% 156 1283.7 3008.5
EXACT SUBJECT 2,283 1.1% 508 22.3% 109 1277.1 4688.2
MAJOR XS 222 0.1% 42 18.9% 125 1081.2 2250.5
EXPLODE XS 1,255 0.6% 204 16.3% 125 3810.2 12185.4
EXPLODE MAJOR 164 0.1% 16 9.8% 269 2093.0 5094.2
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 7,807 3.7% 1,360 17.4% 10 192.0 2976.7
LANGUAGE 5,416 2.6% 364 6.7% 59 597.2 0.0
PUB TYPE 3,239 1.5% 215 6.6% 31 368.0 3585.7
Other indexes 2,817 1.3% 388 13.8% 1 201.3 2623.4
By number of indexes:
Multiple 57,316 30.3% 12,805 22.3% 10 292.4 3534.1
Single 132,134 69.7% 27,467 20.8% 26 1001.1 6725.7
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 126 3.9% 26 20.6% 8 50.0 99.1
JOURNAL 534 16.5% 74 13.9% 2 12.2 30.5
EXACT JOURNAL 209 6.5% 59 28.2% 1 2.0 2.2
SUBJECT 2,266 70.0% 460 20.3% 3 27.0 233.4
EXACT SUBJECT 104 3.2% 26 25.0% 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 3,239 100% 645 19.9% 2 23.0 196.3
LIMITS:
Number of times limits (bit strings) used: 10,555
Use by bit string (percentage):
Current year minus 5 0.2%
Current year minus 4 0.0%
Current year minus 3 2.3%
Current year minus 2 0.4%
Current year minus 1 0.4%
Current year 0.3%
English Language 53.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.1%
XS Adult 0.4%
XS Aged 0.5%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 8.8%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.1%
XS Middle Age 0.0%
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 26.2%
PT Journal Article 0.3%
SUBSET AIM 4.7%
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: 66,210
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.8%
Percentage of ORs 2.9%
Percentage of AND NOTs 1.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
BRIEF 63.9%
LONG 0.8%
MEDLINE 1.1%
FIELDS 2.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.1%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.5%
Ten most frequent errors:
1. NS command - no next screen 39.6%
2. First word of command is invalid 27.0%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 2.2%
6. Valid command at an inappropriate time 2.0%
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 1.2%
10. DISPLAY command-record numbers too large 1.2%
11. All others 13.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.2%
2. FIND 10.1%
3. LOCATE (article dbs w/o monographs) 9.6%
4. MEDLINE BACKFILES 7.9%
5. COMMANDS 6.2%
6. Unrecognized term 6.1%
7. ADD-ON SEARCH 4.1%
8. INDEXES 3.9%
9. DISPLAY 3.5%
10. DATABASES 3.1%
11. All others 29.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.0%
2. First word of command is invalid 15.3%
3. FIND command with invalid index name 6.4%
4. FIND command retrieves >1 book 5.5%
5. DISPLAY command-first of >1 screen 5.5%
6. DISPLAY command - middle of >1 screen 4.7%
7. NS command - no next screen 3.6%
8. DISPLAY command - last of >1 screen 3.1%
9. FIND command with zero results 2.9%
10. DISPLAY command-complete in one screen 2.6%
11. All others 31.3%
Ten most frequent SHOW requests:
1. HISTORY 66.1%
2. SEARCH 14.9%
3. MAIL STATUS 8.3%
4. SETTINGS 3.3%
5. MEDLINE GLOSSARY 2.1%
6. MAIL SETTINGS 1.3%
7. MEDLINE STATISTICS 0.5%
8. DISPLAY 0.4%
9. MEDLINE NEWS 0.4%
10. DATABASES 0.4%
11. All others 2.4%