MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/01/00 through 11/30/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 767 2,764 3,531
Davis 110 2,523 706 3,339
Irvine 0 1,737 0 1,737
Los Angeles 0 1,365 692 2,057
Riverside 0 73 341 414
San Diego 472 2,130 153 2,755
San Francisco 536 0 6,166 6,702
Santa Barbara 0 98 118 216
Santa Cruz 95 25 415 535
Stanford 1,015
Other (including DLA) 0 0 7,700 7,700
_______________ _________ _________ _________
Total: 1,213 8,718 19,055 30,001
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 21,976 69,867 943,619
MED90 database 3,537 7,649 55,425
MED85 database 1,849 3,484 26,156
MED80 database 1,246 2,327 15,662
MED75 database 777 1,451 7,481
MED66 database 616 1,198 9,182
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 258 901 9,819
2-4 a.m. 84 296 2,541
4-6 a.m. 130 304 2,891
6-8 a.m. 527 1,373 13,397
8-10 a.m. 3,475 9,159 106,629
10-12 a.m. 5,905 16,809 287,742
12-2 p.m. 5,223 15,121 171,676
2-4 p.m. 6,062 17,176 186,057
4-6 p.m. 4,427 12,701 139,681
6-8 p.m. 1,928 6,069 62,588
8-10 p.m. 1,276 3,737 45,844
10-12 p.m. 706 2,330 28,660
__________ __________ __________ _________________
Total: 30,001 85,976 1,057,525
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 16:48 14:01 14:10 13:59
Median 10:37 8:44 10:31 8:55
Total:
Average 16:48 14:01 14:10 13:59
Median 10:37 8:44 10:31 8:55
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.9
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 30,001 100%
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 874.8
Retrievals per search - median 10.0
Retrievals per search - standard deviation 8152.2
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 67.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 64,847 24.8%
DISPLAY (excluding automatic displays) 92,435 35.4%
BROWSE 1,707 0.7%
SELECT 1,254 0.5%
HELP 2,118 0.8%
EXPLAIN 1,725 0.7%
SAVE 18,414 7.0%
SET/RESET 13,463 5.1%
SHOW 855 0.3%
ADD-ON (AND, OR, AND NOT) 17,363 6.6%
LOGON or LOGOFF 35,183 13.5%
COMMENT 1 0.0%
OTHER 12,080 4.6%
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 25,741 28.1% 5,291 20.6% 12 105.7 667.3
TITLE WORD 11,242 12.3% 3,590 31.9% 9 776.7 8067.9
EXACT TITLE 573 0.6% 248 43.3% 1 20.0 102.2
JOURNAL 3,945 4.3% 1,224 31.0% 144 2228.8 6869.8
EXACT JOURNAL 1,486 1.6% 450 30.3% 440 2052.7 4659.5
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 33,803 36.9% 6,338 18.7% 31 1626.5 12218.5
SUBJECT WORD 106 0.1% 39 36.8% 130 904.8 2721.1
SUBJECT 2,677 2.9% 1,085 40.5% 191 3265.6 10808.7
MAJOR SUBJECT 192 0.2% 22 11.5% 202 2195.6 4916.3
EXACT SUBJECT 1,366 1.5% 250 18.3% 110 1849.9 6234.4
MAJOR XS 286 0.3% 52 18.2% 222 1176.0 4071.7
EXPLODE XS 545 0.6% 58 10.6% 222 7897.9 32949.7
EXPLODE MAJOR 85 0.1% 9 10.6% 263 5898.7 21065.1
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 3,722 4.1% 498 13.4% 14 315.8 3475.2
LANGUAGE 2,339 2.6% 105 4.5% 82 874.9 0.0
PUB TYPE 1,683 1.8% 213 12.7% 34 341.5 1496.0
Other indexes 1,621 1.8% 200 12.3% 1 104.8 1113.8
By number of indexes:
Multiple 26,926 32.8% 5,868 21.8% 12 430.6 4659.2
Single 55,054 67.2% 11,225 20.4% 31 1497.3 10894.2
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 375 22.3% 33 8.8% 4 14.5 44.1
JOURNAL 279 16.6% 57 20.4% 2 19.4 127.9
EXACT JOURNAL 20 1.2% 3 15.0% 1 1.9 3.4
SUBJECT 898 53.4% 150 16.7% 3 58.4 532.4
EXACT SUBJECT 111 6.6% 17 15.3% 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 1,683 100% 260 15.4% 2 37.3 390.4
LIMITS:
Number of times limits (bit strings) used: 6,130
Use by bit string (percentage):
Current year minus 5 21.5%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.3%
Current year minus 1 0.3%
Current year 0.2%
English Language 39.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.2%
XS Animal 0.0%
XS Case Report 0.1%
XS Child 0.5%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 7.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
XS Rats 0.7%
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 24.6%
PT Journal Article 0.2%
SUBSET AIM 2.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 31,387
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.2%
Percentage of ORs 3.6%
Percentage of AND NOTs 1.1%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
BRIEF 63.9%
LONG 0.8%
MEDLINE 1.0%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.3%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.5%
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 39.8%
2. First word of command is invalid 26.0%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 3.9%
5. PS command - no previous screen 2.4%
6. Search term missing from search command 1.9%
7. Add-on search with invalid index name 1.9%
8. Valid command at an inappropriate time 1.6%
9. NS of SHOW/EXP command-no next screen 1.2%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 16.1%
2. BOOKS DATABASE 15.9%
3. FIND 8.8%
4. MEDLINE BACKFILES 7.0%
5. Unrecognized term 5.3%
6. COMMANDS 5.0%
7. DISPLAY 3.8%
8. ADD-ON SEARCH 3.4%
9. DATABASES 3.0%
10. INDEXES 2.8%
11. All others 27.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.9%
2. First word of command is invalid 15.9%
3. FIND command with invalid index name 7.8%
4. DISPLAY command-first of >1 screen 7.0%
5. DISPLAY command - middle of >1 screen 5.2%
6. FIND command retrieves >1 book 4.7%
7. DISPLAY command - last of >1 screen 3.1%
8. NS of SHOW/EXP command-no next screen 3.0%
9. NS command - no next screen 2.8%
10. DISPLAY command-complete in one screen 2.6%
11. All others 28.9%
Ten most frequent SHOW requests:
1. HISTORY 69.2%
2. SEARCH 15.3%
3. MAIL STATUS 5.8%
4. SETTINGS 2.4%
5. MEDLINE GLOSSARY 1.6%
6. MAIL SETTINGS 1.4%
7. MEDLINE NEWS 1.0%
8. UPDATE 1.0%
9. MEDLINE STATISTICS 0.4%
10. DISPLAY 0.3%
11. All others 1.6%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)