MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/18/00 through 11/24/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 111 441 552
Davis 11 466 129 606
Irvine 0 440 0 440
Los Angeles 0 224 120 344
Riverside 0 16 18 34
San Diego 78 318 52 448
San Francisco 100 0 1,035 1,135
Santa Barbara 0 11 18 29
Santa Cruz 23 3 33 59
Stanford 158
Other (including DLA) 0 0 1,419 1,419
_______________ _________ _________ _________
Total: 212 1,589 3,265 5,224
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,803 12,666 261,742
MED90 database 590 1,336 10,880
MED85 database 354 670 6,149
MED80 database 220 376 2,769
MED75 database 148 281 1,352
MED66 database 109 200 2,555
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 47 185 2,332
2-4 a.m. 23 90 1,027
4-6 a.m. 46 94 728
6-8 a.m. 101 224 1,991
8-10 a.m. 561 1,523 29,160
10-12 a.m. 914 2,846 140,846
12-2 p.m. 877 2,710 29,974
2-4 p.m. 1,108 3,167 29,185
4-6 p.m. 792 2,448 27,468
6-8 p.m. 289 1,054 9,912
8-10 p.m. 301 698 6,740
10-12 p.m. 165 490 6,084
__________ __________ __________ _________________
Total: 5,224 15,529 285,447
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 19:00 13:43 12:43 14:00
Median 12:36 9:01 9:54 9:03
Total:
Average 19:00 13:43 12:43 14:00
Median 12:36 9:01 9:54 9:03
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.7
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 5,224 100%
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 770.6
Retrievals per search - median 10.0
Retrievals per search - standard deviation 5924.6
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.5%
Percent of long searches completed 65.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,700 25.1%
DISPLAY (excluding automatic displays) 16,779 36.0%
BROWSE 184 0.4%
SELECT 104 0.2%
HELP 371 0.8%
EXPLAIN 329 0.7%
SAVE 3,265 7.0%
SET/RESET 2,274 4.9%
SHOW 163 0.3%
ADD-ON (AND, OR, AND NOT) 3,202 6.9%
LOGON or LOGOFF 6,205 13.3%
COMMENT 0 0.0%
OTHER 1,995 4.3%
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 4,492 26.8% 941 20.9% 12 86.5 521.2
TITLE WORD 2,041 12.2% 619 30.3% 9 369.3 1975.9
EXACT TITLE 82 0.5% 41 50.0% 2 44.4 168.2
JOURNAL 671 4.0% 203 30.3% 198 1801.6 5348.3
EXACT JOURNAL 337 2.0% 96 28.5% 407 1989.2 3296.8
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 6,373 38.1% 1,224 19.2% 32 1577.3 9614.1
SUBJECT WORD 13 0.1% 3 23.1% 44 1949.3 4432.3
SUBJECT 514 3.1% 217 42.2% 311 3034.1 10105.2
MAJOR SUBJECT 32 0.2% 8 25.0% 203 1172.9 2073.8
EXACT SUBJECT 255 1.5% 51 20.0% 131 1864.7 6662.9
MAJOR XS 53 0.3% 9 17.0% 39 532.4 1566.0
EXPLODE XS 36 0.2% 6 16.7% 761 3121.0 4251.9
EXPLODE MAJOR 22 0.1% 4 18.2% 35 1274.9 2412.3
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 677 4.0% 91 13.4% 17 692.4 7562.8
LANGUAGE 450 2.7% 19 4.2% 115 779.6 0.0
PUB TYPE 183 1.1% 18 9.8% 40 490.4 2188.0
Other indexes 352 2.1% 53 15.1% 1 132.4 1101.4
By number of indexes:
Multiple 5,093 34.3% 1,140 22.4% 13 545.9 5232.3
Single 9,769 65.7% 1,934 19.8% 33 1236.2 7407.8
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 13 7.1% 4 30.8% 11 76.8 103.7
JOURNAL 33 18.0% 2 6.1% 2 8.0 17.2
EXACT JOURNAL 4 2.2% 1 25.0% 1 1.3 0.6
SUBJECT 129 70.5% 16 12.4% 4 83.3 756.2
EXACT SUBJECT 4 2.2% 0 0.0% 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 183 100% 23 12.6% 3 64.7 635.9
LIMITS:
Number of times limits (bit strings) used: 1,093
Use by bit string (percentage):
Current year minus 5 15.5%
Current year minus 4 0.0%
Current year minus 3 1.2%
Current year minus 2 0.5%
Current year minus 1 0.5%
Current year 0.3%
English Language 42.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.3%
XS Adult 0.1%
XS Aged 0.2%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.0%
XS English Abstract 0.1%
XS Female 0.5%
XS Human 5.1%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.1%
XS Middle Age 0.0%
XS Rats 2.6%
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 27.1%
PT Journal Article 0.6%
SUBSET AIM 2.3%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 5,860
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.5%
Percentage of ORs 3.7%
Percentage of AND NOTs 0.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 64.0%
LONG 0.8%
MEDLINE 0.6%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
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 8.9%
Ten most frequent errors:
1. NS command - no next screen 39.0%
2. First word of command is invalid 24.8%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 4.6%
5. PS command - no previous screen 2.6%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 1.9%
8. Add-on search with invalid index name 1.8%
9. DISPLAY command-record numbers too large 1.0%
10. Command containing escape or arrow key 1.0%
11. All others 14.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 14.3%
2. BOOKS DATABASE 13.4%
3. FIND 10.3%
4. MEDLINE BACKFILES 7.9%
5. Unrecognized term 5.8%
6. DATABASES 4.0%
7. COMMANDS 4.0%
8. ADD-ON SEARCH 3.6%
9. 3304 3.0%
10. A059 2.7%
11. All others 27.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.6%
2. First word of command is invalid 16.6%
3. DISPLAY command-first of >1 screen 9.1%
4. FIND command with invalid index name 6.7%
5. FIND command retrieves >1 book 5.1%
6. NS command - no next screen 3.3%
7. DISPLAY command - middle of >1 screen 3.3%
8. DISPLAY command-complete in one screen 2.3%
9. FIND command with zero results 2.0%
10. FIND command retrieves 1 book 1.7%
11. All others 31.0%
Ten most frequent SHOW requests:
1. HISTORY 63.6%
2. SEARCH 19.6%
3. MAIL STATUS 7.0%
4. UPDATE 2.8%
5. MAIL SETTINGS 2.1%
6. MEDLINE GLOSSARY 1.4%
7. DLA4 NEWS 0.7%
8. SETTINGS 0.7%
9. 0876 0.7%
10. 0997 0.7%
11. All others 0.7%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)