MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/01/99 through 02/28/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 2,558 6,978 9,536
Davis 325 8,086 1,802 10,213
Irvine 0 6,682 0 6,682
Los Angeles 0 5,423 2,985 8,408
Riverside 1 586 794 1,381
San Diego 1,391 5,722 1,180 8,293
San Francisco 788 0 17,392 18,180
Santa Barbara 0 464 702 1,166
Santa Cruz 352 201 811 1,364
Stanford 6,143
Other (including DLA) 0 0 19,861 19,861
_______________ _________ _________ _________
Total: 2,857 29,722 52,505 91,227
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 66,359 235,417 2,628,199
MED90 database 10,387 23,901 174,859
MED85 database 6,337 13,812 86,765
MED80 database 4,022 8,768 47,271
MED75 database 2,474 4,936 29,202
MED66 database 1,648 3,723 28,130
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 1,054 3,507 45,567
2-4 a.m. 397 1,347 15,047
4-6 a.m. 360 1,114 11,593
6-8 a.m. 1,553 4,461 46,404
8-10 a.m. 8,932 26,764 256,923
10-12 a.m. 16,376 50,396 505,206
12-2 p.m. 16,419 51,251 518,532
2-4 p.m. 18,979 60,275 612,619
4-6 p.m. 13,874 44,498 467,781
6-8 p.m. 6,492 21,644 242,728
8-10 p.m. 4,089 14,731 152,406
10-12 p.m. 2,702 10,569 119,620
__________ __________ __________ _________________
Total: 91,227 290,557 2,994,426
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 15:07 14:00 14:32 13:54
Median 9:25 8:15 7:59 8:14
Total:
Average 15:07 14:00 14:32 13:54
Median 9:25 8:15 7:59 8:14
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.5 5.2
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 91,227 100%
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 3.2
Retrievals per search - average 729.6
Retrievals per search - median 10.0
Retrievals per search - standard deviation 6475.4
Percent of searches completed with 0 results 21.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed 47.5%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 230,754 25.7%
DISPLAY (excluding automatic displays) 329,597 36.7%
BROWSE 4,205 0.5%
SELECT 2,879 0.3%
HELP 10,868 1.2%
EXPLAIN 7,917 0.9%
SAVE 63,342 7.1%
SET/RESET 45,656 5.1%
SHOW 3,477 0.4%
ADD-ON (AND, OR, AND NOT) 51,239 5.7%
LOGON or LOGOFF 107,974 12.0%
COMMENT 9 0.0%
OTHER 39,054 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 89,385 28.3% 18,038 20.2% 12 102.7 620.4
TITLE WORD 31,055 9.8% 9,643 31.1% 7 397.5 2908.3
EXACT TITLE 2,149 0.7% 1,074 50.0% 1 50.4 477.4
JOURNAL 12,470 3.9% 4,277 34.3% 86 2257.3 6516.5
EXACT JOURNAL 4,514 1.4% 1,378 30.5% 235 1726.5 3617.9
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 122,143 38.6% 23,609 19.3% 29 1180.0 9287.7
SUBJECT WORD 758 0.2% 356 47.0% 192 4813.2 22390.2
SUBJECT 11,920 3.8% 5,232 43.9% 196 3057.6 11105.3
MAJOR SUBJECT 638 0.2% 141 22.1% 132 1453.9 3698.9
EXACT SUBJECT 4,077 1.3% 868 21.3% 97 1935.0 10523.4
MAJOR XS 604 0.2% 132 21.9% 143 1646.7 7628.2
EXPLODE XS 2,279 0.7% 328 14.4% 184 6994.3 22494.3
EXPLODE MAJOR 267 0.1% 16 6.0% 797 12162.0 32451.9
TREE NUMBER 7 0.0% 0 0.0% 35 7027.9 10731.2
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 10,991 3.5% 2,123 19.3% 11 243.0 1602.1
LANGUAGE 10,817 3.4% 1,163 10.8% 56 815.3 0.0
PUB TYPE 4,164 1.3% 377 9.1% 33 407.9 4240.8
Other indexes 7,236 2.3% 1,359 18.8% 10 256.5 4369.6
By number of indexes:
Multiple 85,455 30.4% 19,073 22.3% 11 445.2 4736.0
Single 195,293 69.6% 41,740 21.4% 28 1170.3 8272.2
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 225 5.4% 37 16.4% 9 38.7 93.0
JOURNAL 637 15.3% 169 26.5% 2 20.3 104.5
EXACT JOURNAL 162 3.9% 44 27.2% 1 14.0 98.9
SUBJECT 2,973 71.4% 660 22.2% 2 24.8 262.3
EXACT SUBJECT 165 4.0% 48 29.1% 1 1.3 1.8
TREE NUMBER 2 0.0% 0 0.0% 10 9.5 12.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 4,164 100% 958 23.0% 2 23.7 228.3
LIMITS:
Number of times limits (bit strings) used: 18,072
Use by bit string (percentage):
Current year minus 5 0.0%
Current year minus 4 0.0%
Current year minus 3 0.5%
Current year minus 2 0.3%
Current year minus 1 0.4%
Current year 0.4%
English Language 57.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.2%
XS Adult 0.3%
XS Aged 0.4%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.7%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.3%
XS Human 9.4%
XS Infant 0.0%
XS Infant, Newborn 0.2%
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 23.9%
PT Journal Article 0.4%
SUBSET AIM 3.7%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.6%
SUBSET Dental journals 0.1%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 101,718
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.4%
Percentage of ORs 6.5%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
BRIEF 64.0%
LONG 1.0%
MEDLINE 1.3%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 10.0%
Ten most frequent errors:
1. NS command - no next screen 37.1%
2. First word of command is invalid 27.6%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 3.9%
5. DISPLAY command - no FIND results 2.8%
6. PS command - no previous screen 2.6%
7. Valid command at an inappropriate time 1.9%
8. Add-on search with invalid index name 1.9%
9. Search term missing from search command 1.6%
10. NS of SHOW/EXP command-no next screen 1.2%
11. All others 13.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.1%
2. LOCATE (article dbs w/o monographs) 13.5%
3. FIND 8.3%
4. MEDLINE BACKFILES 7.0%
5. COMMANDS 5.8%
6. Unrecognized term 5.5%
7. ADD-ON SEARCH 4.5%
8. INDEXES 3.8%
9. DISPLAY 3.8%
10. MAIL 2.8%
11. All others 28.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.1%
2. First word of command is invalid 14.8%
3. FIND command with invalid index name 7.1%
4. DISPLAY command-first of >1 screen 6.1%
5. FIND command retrieves >1 book 5.2%
6. DISPLAY command - middle of >1 screen 5.0%
7. NS command - no next screen 3.9%
8. DISPLAY command - last of >1 screen 3.3%
9. DISPLAY command-complete in one screen 2.4%
10. FIND command with zero results 2.4%
11. All others 29.9%
Ten most frequent SHOW requests:
1. HISTORY 58.6%
2. SEARCH 21.1%
3. MAIL STATUS 7.4%
4. SETTINGS 3.4%
5. MEDLINE NEWS 2.2%
6. MEDLINE GLOSSARY 2.1%
7. MAIL SETTINGS 1.8%
8. DISPLAY 0.5%
9. UPDATE 0.5%
10. DATABASES 0.4%
11. All others 2.0%