MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/01/99 through 09/30/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,673 5,331 7,004
Davis 268 5,007 1,004 6,279
Irvine 0 4,275 0 4,275
Los Angeles 0 3,238 1,405 4,643
Riverside 0 212 588 800
San Diego 915 4,095 437 5,447
San Francisco 863 0 12,495 13,358
Santa Barbara 0 73 494 567
Santa Cruz 175 101 654 930
Stanford 2,969
Other (including DLA) 0 0 13,967 13,967
_______________ _________ _________ _________
Total: 2,221 18,674 36,375 60,239
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 42,956 142,529 1,625,388
MED90 database 7,996 18,997 163,197
MED85 database 4,159 8,932 80,077
MED80 database 2,566 5,569 41,492
MED75 database 1,472 3,143 23,184
MED66 database 1,090 2,595 21,917
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 665 2,081 19,071
2-4 a.m. 257 626 6,019
4-6 a.m. 205 638 -6,087
6-8 a.m. 1,198 3,458 34,499
8-10 a.m. 6,422 18,722 174,543
10-12 a.m. 11,544 34,606 352,310
12-2 p.m. 10,710 31,797 344,360
2-4 p.m. 12,788 39,430 449,534
4-6 p.m. 8,920 26,483 294,144
6-8 p.m. 3,800 11,762 125,790
8-10 p.m. 2,248 7,424 105,579
10-12 p.m. 1,482 4,738 55,493
__________ __________ __________ _________________
Total: 60,239 181,765 1,955,255
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 15:18 13:48 15:22 13:42
Median 10:26 8:33 11:08 8:22
Total:
Average 15:18 13:48 15:22 13:42
Median 10:26 8:33 11:08 8:22
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.2 3.8
transmission of response
Display - from receipt of command at DLA until 0.2 0.3
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 60,239 100%
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 659.5
Retrievals per search - median 9.0
Retrievals per search - standard deviation 5705.2
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.3%
Percent of long searches completed 48.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 139,669 25.1%
DISPLAY (excluding automatic displays) 198,173 35.6%
BROWSE 3,074 0.6%
SELECT 2,179 0.4%
HELP 5,242 0.9%
EXPLAIN 3,928 0.7%
SAVE 42,736 7.7%
SET/RESET 26,531 4.8%
SHOW 2,368 0.4%
ADD-ON (AND, OR, AND NOT) 35,198 6.3%
LOGON or LOGOFF 70,444 12.7%
COMMENT 3 0.0%
OTHER 26,379 4.7%
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 56,886 29.1% 11,520 20.3% 12 100.5 616.2
TITLE WORD 19,752 10.1% 6,152 31.1% 8 467.7 3086.3
EXACT TITLE 1,702 0.9% 750 44.1% 1 15.6 96.7
JOURNAL 7,972 4.1% 2,455 30.8% 135 1663.3 4907.7
EXACT JOURNAL 2,961 1.5% 962 32.5% 276 1600.2 3268.4
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 73,620 37.7% 14,001 19.0% 30 1168.2 7979.2
SUBJECT WORD 268 0.1% 130 48.5% 74 2947.0 17581.7
SUBJECT 6,653 3.4% 2,513 37.8% 218 2857.0 10681.1
MAJOR SUBJECT 666 0.3% 124 18.6% 157 898.7 2335.4
EXACT SUBJECT 3,347 1.7% 556 16.6% 94 1524.4 18145.3
MAJOR XS 330 0.2% 47 14.2% 241 1170.3 2313.5
EXPLODE XS 1,918 1.0% 271 14.1% 122 3503.3 16950.8
EXPLODE MAJOR 206 0.1% 24 11.7% 131 5580.2 21099.5
TREE NUMBER 3 0.0% 2 66.7% 281 281.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 7,435 3.8% 1,165 15.7% 9 133.4 1148.1
LANGUAGE 5,286 2.7% 258 4.9% 86 649.5 0.0
PUB TYPE 3,037 1.6% 232 7.6% 40 417.5 3941.5
Other indexes 2,851 1.5% 347 12.2% 1 128.5 1744.4
By number of indexes:
Multiple 56,019 32.2% 11,810 21.1% 12 354.2 5250.6
Single 118,122 67.8% 24,500 20.7% 29 1100.1 7027.6
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 95 3.1% 10 10.5% 3 37.5 106.6
JOURNAL 448 14.8% 91 20.3% 2 12.1 42.5
EXACT JOURNAL 150 4.9% 46 30.7% 1 2.7 4.8
SUBJECT 2,175 71.6% 408 18.8% 2 44.2 423.1
EXACT SUBJECT 169 5.6% 27 16.0% 1 1.1 1.0
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 3,037 100% 582 19.2% 2 35.1 360.2
LIMITS:
Number of times limits (bit strings) used: 11,430
Use by bit string (percentage):
Current year minus 5 0.3%
Current year minus 4 0.0%
Current year minus 3 1.6%
Current year minus 2 0.4%
Current year minus 1 0.4%
Current year 0.3%
English Language 49.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.6%
XS Adolescence 0.2%
XS Adult 0.4%
XS Aged 0.4%
XS Animal 0.0%
XS Case Report 0.1%
XS Child 0.5%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.6%
XS Human 12.1%
XS Infant 0.0%
XS Infant, Newborn 0.8%
XS Male 0.2%
XS Mice 0.0%
XS Middle Age 0.1%
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 26.0%
PT Journal Article 1.2%
SUBSET AIM 3.8%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 65,702
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.6%
Percentage of ORs 4.2%
Percentage of AND NOTs 2.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.6%
BRIEF 64.5%
LONG 0.9%
MEDLINE 1.2%
FIELDS 3.0%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.2%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.4%
Ten most frequent errors:
1. NS command - no next screen 39.0%
2. First word of command is invalid 26.9%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 2.3%
6. Add-on search with invalid index name 1.9%
7. Valid command at an inappropriate time 1.7%
8. Search term missing from search command 1.6%
9. NS of SHOW/EXP command-no next screen 1.3%
10. Command containing escape or arrow key 1.2%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.0%
2. LOCATE (article dbs w/o monographs) 12.2%
3. FIND 9.5%
4. MEDLINE BACKFILES 7.6%
5. COMMANDS 5.7%
6. Unrecognized term 5.3%
7. ADD-ON SEARCH 4.5%
8. DISPLAY 4.0%
9. DATABASES 3.1%
10. INDEXES 2.9%
11. All others 30.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.5%
2. First word of command is invalid 14.4%
3. FIND command with invalid index name 6.9%
4. DISPLAY command-first of >1 screen 5.7%
5. FIND command retrieves >1 book 5.4%
6. DISPLAY command - middle of >1 screen 4.9%
7. NS command - no next screen 4.1%
8. DISPLAY command - last of >1 screen 3.0%
9. NS of SHOW/EXP command-no next screen 2.7%
10. FIND command with zero results 2.5%
11. All others 32.4%
Ten most frequent SHOW requests:
1. HISTORY 64.4%
2. SEARCH 15.8%
3. MAIL STATUS 6.8%
4. SETTINGS 4.0%
5. DLA NEWS 2.2%
6. MEDLINE GLOSSARY 1.5%
7. MAIL SETTINGS 0.7%
8. DLA5 NEWS 0.5%
9. DISPLAY 0.5%
10. UPDATE 0.5%
11. All others 3.0%