MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/09/00 through 12/15/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 138 609 747
Davis 25 515 170 710
Irvine 0 413 0 413
Los Angeles 0 227 164 391
Riverside 0 14 65 79
San Diego 110 457 61 628
San Francisco 101 0 1,470 1,571
Santa Barbara 0 15 76 91
Santa Cruz 4 12 34 50
Stanford 241
Other (including DLA) 0 0 1,892 1,892
_______________ _________ _________ _________
Total: 240 1,791 4,541 6,813
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,942 16,542 163,013
MED90 database 863 1,870 11,670
MED85 database 421 837 5,368
MED80 database 251 525 2,955
MED75 database 180 366 2,007
MED66 database 156 369 2,492
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 74 282 3,227
2-4 a.m. 20 60 442
4-6 a.m. 26 89 589
6-8 a.m. 128 307 2,536
8-10 a.m. 785 2,156 18,767
10-12 a.m. 1,329 3,896 34,522
12-2 p.m. 1,198 3,605 31,486
2-4 p.m. 1,364 3,761 36,136
4-6 p.m. 1,050 3,512 33,844
6-8 p.m. 462 1,560 13,077
8-10 p.m. 232 771 7,971
10-12 p.m. 145 510 4,908
__________ __________ __________ _________________
Total: 6,813 20,509 187,505
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 14:40 13:58 23:27 14:14
Median 10:05 9:37 13:07 9:59
Total:
Average 14:40 13:58 23:27 14:14
Median 10:05 9:37 13:07 9:59
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.4
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 6,813 100%
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 752.5
Retrievals per search - median 10.0
Retrievals per search - standard deviation 7042.9
Percent of searches completed with 0 results 19.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed 56.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 15,399 25.8%
DISPLAY (excluding automatic displays) 20,708 34.7%
BROWSE 211 0.4%
SELECT 121 0.2%
HELP 373 0.6%
EXPLAIN 321 0.5%
SAVE 4,490 7.5%
SET/RESET 3,128 5.2%
SHOW 207 0.3%
ADD-ON (AND, OR, AND NOT) 4,419 7.4%
LOGON or LOGOFF 7,697 12.9%
COMMENT 0 0.0%
OTHER 2,627 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 6,792 30.9% 1,384 20.4% 12 124.5 844.5
TITLE WORD 2,740 12.5% 802 29.3% 8 568.1 9818.4
EXACT TITLE 166 0.8% 76 45.8% 1 43.3 171.7
JOURNAL 967 4.4% 254 26.3% 168 2150.8 6512.6
EXACT JOURNAL 318 1.4% 57 17.9% 167 1406.2 2737.1
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 7,418 33.7% 1,285 17.3% 30 1559.8 11787.9
SUBJECT WORD 7 0.0% 3 42.9% 81 1289.3 2470.4
SUBJECT 581 2.6% 214 36.8% 173 5421.8 27161.5
MAJOR SUBJECT 43 0.2% 6 14.0% 134 1460.2 3365.5
EXACT SUBJECT 242 1.1% 21 8.7% 63 1457.9 7934.0
MAJOR XS 96 0.4% 5 5.2% 161 601.1 1839.0
EXPLODE XS 47 0.2% 16 34.0% 433 2601.0 5039.2
EXPLODE MAJOR 94 0.4% 3 3.2% 306 4042.2 18607.5
TREE NUMBER 1 0.0% 0 0.0% 63 63.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 947 4.3% 148 15.6% 18 180.7 585.8
LANGUAGE 546 2.5% 26 4.8% 82 873.0 0.0
PUB TYPE 209 0.9% 49 23.4% 38 309.6 1565.3
Other indexes 471 2.1% 69 14.6% 1 12.2 123.9
By number of indexes:
Multiple 6,643 33.6% 1,408 21.2% 12 468.9 7443.9
Single 13,130 66.4% 2,411 18.4% 29 1201.1 8193.2
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 6 2.9% 0 0.0% 1 57.8 120.3
JOURNAL 50 23.9% 8 16.0% 2 25.0 81.4
EXACT JOURNAL 12 5.7% 1 8.3% 1 3.6 4.7
SUBJECT 132 63.2% 25 18.9% 3 8.6 18.3
EXACT SUBJECT 8 3.8% 1 12.5% 1 1.7 1.9
TREE NUMBER 1 0.5% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 209 100% 35 16.7% 2 13.6 48.2
LIMITS:
Number of times limits (bit strings) used: 1,605
Use by bit string (percentage):
Current year minus 5 19.1%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.2%
Current year minus 1 0.6%
Current year 0.3%
English Language 37.3%
French Language 0.1%
Japanese Language 0.0%
German Language 0.2%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.8%
XS Adult 0.1%
XS Aged 0.0%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 1.4%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 6.6%
XS Infant 0.0%
XS Infant, Newborn 0.9%
XS Male 0.2%
XS Mice 0.0%
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 28.9%
PT Journal Article 0.1%
SUBSET AIM 1.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.1%
BOOLEAN:
Number of searches with Booleans: 7,664
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.6%
Percentage of ORs 3.3%
Percentage of AND NOTs 2.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
BRIEF 64.1%
LONG 0.8%
MEDLINE 0.9%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 0.7%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 40.6%
2. First word of command is invalid 24.7%
3. FIND command with invalid index name 5.8%
4. DISPLAY command contains invalid word 4.1%
5. Add-on search with invalid index name 2.0%
6. NS of SHOW/EXP command-no next screen 1.9%
7. PS command - no previous screen 1.8%
8. DISPLAY command-record numbers too large 1.6%
9. Search term missing from search command 1.5%
10. Valid command at an inappropriate time 1.0%
11. All others 15.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.5%
2. LOCATE (article dbs w/o monographs) 10.6%
3. FIND 7.2%
4. MEDLINE BACKFILES 6.5%
5. COMMANDS 5.9%
6. DISPLAY 5.6%
7. MAIL 4.7%
8. Unrecognized term 4.4%
9. DATABASES 4.4%
10. INDEXES 3.4%
11. All others 30.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.2%
2. First word of command is invalid 15.0%
3. DISPLAY command - middle of >1 screen 5.5%
4. DISPLAY command-first of >1 screen 5.3%
5. FIND command with invalid index name 4.9%
6. FIND command retrieves >1 book 4.5%
7. NS command - no next screen 4.0%
8. NS of SHOW/EXP command-no next screen 4.0%
9. DISPLAY command-complete in one screen 3.6%
10. PS command - no previous screen 3.0%
11. All others 34.9%
Ten most frequent SHOW requests:
1. HISTORY 73.0%
2. SEARCH 14.9%
3. MAIL STATUS 5.0%
4. SETTINGS 3.5%
5. MEDLINE NEWS 1.4%
6. MAIL SETTINGS 0.7%
7. SUBSETS 0.7%
8. UPDATE 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)