MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/05/00 through 08/11/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 137 748 885
Davis 29 703 158 890
Irvine 0 461 0 461
Los Angeles 0 405 207 612
Riverside 0 21 58 79
San Diego 178 493 88 759
San Francisco 109 0 1,938 2,047
Santa Barbara 0 1 59 60
Santa Cruz 38 5 67 110
Stanford 370
Other (including DLA) 0 0 1,984 1,984
_______________ _________ _________ _________
Total: 354 2,226 5,307 8,257
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,914 18,999 201,184
MED90 database 1,105 2,336 14,279
MED85 database 534 1,115 5,825
MED80 database 342 679 2,981
MED75 database 185 371 2,214
MED66 database 177 427 2,281
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 100 236 3,554
2-4 a.m. 37 52 389
4-6 a.m. 27 59 693
6-8 a.m. 139 466 3,531
8-10 a.m. 876 2,549 23,516
10-12 a.m. 1,662 4,542 45,310
12-2 p.m. 1,480 4,288 35,940
2-4 p.m. 1,732 5,169 46,810
4-6 p.m. 1,225 3,394 39,148
6-8 p.m. 493 1,673 14,612
8-10 p.m. 312 861 8,888
10-12 p.m. 174 638 6,373
__________ __________ __________ _________________
Total: 8,257 23,927 228,764
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 13:29 14:00 17:50 13:56
Median 9:23 9:01 11:13 8:59
Total:
Average 13:29 14:00 17:50 13:56
Median 9:23 9:01 11:13 8:59
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.5
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 8,257 100%
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 2.9
Retrievals per search - average 683.2
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6648.4
Percent of searches completed with 0 results 20.6%
Percent of searches entered that are long 0.2%
Percent of long searches completed 49.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 18,281 25.5%
DISPLAY (excluding automatic displays) 25,504 35.6%
BROWSE 337 0.5%
SELECT 204 0.3%
HELP 454 0.6%
EXPLAIN 436 0.6%
SAVE 5,014 7.0%
SET/RESET 3,800 5.3%
SHOW 196 0.3%
ADD-ON (AND, OR, AND NOT) 4,645 6.5%
LOGON or LOGOFF 9,361 13.1%
COMMENT 0 0.0%
OTHER 3,355 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 8,128 31.4% 1,633 20.1% 12 93.7 643.5
TITLE WORD 3,132 12.1% 1,013 32.3% 6 543.4 3682.0
EXACT TITLE 184 0.7% 69 37.5% 1 31.3 180.7
JOURNAL 1,237 4.8% 387 31.3% 62 2643.3 10457.6
EXACT JOURNAL 408 1.6% 127 31.1% 380 1955.2 4671.0
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 8,946 34.5% 1,617 18.1% 28 1191.2 9918.7
SUBJECT WORD 19 0.1% 7 36.8% 204 968.8 1932.8
SUBJECT 619 2.4% 234 37.8% 117 2733.1 10097.7
MAJOR SUBJECT 63 0.2% 8 12.7% 164 1851.7 4797.1
EXACT SUBJECT 311 1.2% 60 19.3% 95 1821.1 7521.6
MAJOR XS 67 0.3% 10 14.9% 205 2766.1 9567.5
EXPLODE XS 151 0.6% 16 10.6% 152 8311.1 33606.5
EXPLODE MAJOR 14 0.1% 1 7.1% 369 11665.8 32663.8
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 1,207 4.7% 195 16.2% 7 268.4 3272.7
LANGUAGE 605 2.3% 33 5.5% 81 857.8 0.0
PUB TYPE 337 1.3% 21 6.2% 32 182.2 452.2
Other indexes 439 1.7% 48 10.9% 1 26.6 191.9
By number of indexes:
Multiple 7,548 33.0% 1,563 20.7% 9 363.6 4291.9
Single 15,331 67.0% 3,189 20.8% 28 1157.7 8792.7
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 26 7.7% 0 0.0% 3 11.3 16.7
JOURNAL 130 38.6% 25 19.2% 2 9.6 29.3
EXACT JOURNAL 15 4.5% 3 20.0% 1 1.7 1.2
SUBJECT 153 45.4% 34 22.2% 3 11.5 24.8
EXACT SUBJECT 13 3.9% 3 23.1% 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 337 100% 65 19.3% 2 9.9 25.1
LIMITS:
Number of times limits (bit strings) used: 1,428
Use by bit string (percentage):
Current year minus 5 16.9%
Current year minus 4 0.0%
Current year minus 3 1.1%
Current year minus 2 0.7%
Current year minus 1 0.3%
Current year 1.0%
English Language 43.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.9%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.4%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.5%
XS Infant 0.0%
XS Infant, Newborn 0.2%
XS Male 0.1%
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 22.0%
PT Journal Article 0.1%
SUBSET AIM 3.7%
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: 8,666
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.8%
Percentage of ORs 3.2%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
BRIEF 62.8%
LONG 1.0%
MEDLINE 1.0%
FIELDS 4.0%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.4%
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 8.8%
Ten most frequent errors:
1. NS command - no next screen 42.5%
2. First word of command is invalid 25.1%
3. FIND command with invalid index name 5.7%
4. DISPLAY command contains invalid word 4.1%
5. Add-on search with invalid index name 1.8%
6. Valid command at an inappropriate time 1.7%
7. Search term missing from search command 1.7%
8. PS command - no previous screen 1.5%
9. DISPLAY command - no FIND results 1.2%
10. Command containing escape or arrow key 1.1%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.0%
2. FIND 9.6%
3. LOCATE (article dbs w/o monographs) 9.2%
4. MEDLINE BACKFILES 9.2%
5. Unrecognized term 5.0%
6. DATABASES 4.8%
7. DISPLAY 4.1%
8. COMMANDS 3.7%
9. MAIL 2.3%
10. SAVE 2.3%
11. All others 33.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.3%
2. First word of command is invalid 15.2%
3. FIND command with invalid index name 6.1%
4. DISPLAY command - middle of >1 screen 5.1%
5. FIND command retrieves >1 book 4.7%
6. DISPLAY command-first of >1 screen 4.5%
7. DISPLAY command - last of >1 screen 3.7%
8. NS command - no next screen 2.8%
9. NS of SHOW/EXP command-no next screen 2.4%
10. FIND command with zero results 2.1%
11. All others 35.8%
Ten most frequent SHOW requests:
1. HISTORY 76.7%
2. SEARCH 10.3%
3. MAIL STATUS 6.2%
4. SETTINGS 4.8%
5. MEDLINE GLOSSARY 1.4%
6. DATABASES 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)