MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/01/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 307 1,763 2,070
Davis 59 1,539 306 1,904
Irvine 0 927 0 927
Los Angeles 0 102 366 468
Riverside 0 16 123 139
San Diego 251 1,304 48 1,603
San Francisco 323 0 3,473 3,796
Santa Barbara 0 3 90 93
Santa Cruz 0 13 94 107
Stanford 298
Other (including DLA) 0 0 6,065 6,065
_______________ _________ _________ _________
Total: 633 4,211 12,328 17,470
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 12,568 38,044 464,245
MED90 database 2,058 4,522 45,033
MED85 database 1,174 2,472 38,969
MED80 database 747 1,564 18,832
MED75 database 495 984 13,910
MED66 database 428 898 16,035
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 105 334 4,107
2-4 a.m. 85 280 2,854
4-6 a.m. 75 166 1,173
6-8 a.m. 403 1,139 12,043
8-10 a.m. 2,173 5,965 63,166
10-12 a.m. 3,663 9,662 97,355
12-2 p.m. 3,102 8,939 128,166
2-4 p.m. 3,546 9,837 138,047
4-6 p.m. 2,333 6,606 75,742
6-8 p.m. 1,021 2,986 39,543
8-10 p.m. 600 1,595 16,415
10-12 p.m. 364 975 18,413
__________ __________ __________ _________________
Total: 17,470 48,484 597,024
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 19:56 15:11 20:24 15:17
Median 12:11 9:10 12:44 9:33
Total:
Average 19:56 15:11 20:24 15:17
Median 12:11 9:10 12:44 9:33
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.1
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 17,470 100%
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 2.8
Retrievals per search - average 932.4
Retrievals per search - median 9.0
Retrievals per search - standard deviation 9286.2
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.4%
Percent of long searches completed 60.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 35,697 25.0%
DISPLAY (excluding automatic displays) 50,022 35.0%
BROWSE 1,005 0.7%
SELECT 253 0.2%
HELP 909 0.6%
EXPLAIN 706 0.5%
SAVE 10,283 7.2%
SET/RESET 9,191 6.4%
SHOW 431 0.3%
ADD-ON (AND, OR, AND NOT) 10,410 7.3%
LOGON or LOGOFF 17,939 12.5%
COMMENT 1 0.0%
OTHER 6,206 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 14,503 28.5% 3,053 21.1% 12 135.2 794.4
TITLE WORD 7,632 15.0% 2,361 30.9% 8 782.2 4052.4
EXACT TITLE 329 0.6% 144 43.8% 2 53.7 430.4
JOURNAL 2,413 4.7% 690 28.6% 286 2375.2 7734.4
EXACT JOURNAL 984 1.9% 284 28.9% 958 2549.5 5897.3
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 17,049 33.5% 3,210 18.8% 31 1907.4 15709.7
SUBJECT WORD 65 0.1% 24 36.9% 12 12623.2 77265.7
SUBJECT 1,140 2.2% 385 33.8% 332 3473.1 11566.7
MAJOR SUBJECT 144 0.3% 21 14.6% 333 2441.2 4971.7
EXACT SUBJECT 867 1.7% 228 26.3% 117 1909.0 7877.3
MAJOR XS 158 0.3% 27 17.1% 230 1016.0 2174.6
EXPLODE XS 183 0.4% 37 20.2% 43 6706.4 17533.1
EXPLODE MAJOR 65 0.1% 4 6.2% 741 9549.4 26916.6
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 3,019 5.9% 416 13.8% 17 225.7 2070.9
LANGUAGE 924 1.8% 42 4.5% 79 977.1 0.0
PUB TYPE 997 2.0% 39 3.9% 53 744.5 6349.7
Other indexes 759 1.5% 79 10.4% 1 34.5 143.4
By number of indexes:
Multiple 15,108 32.9% 3,175 21.0% 12 523.3 6780.7
Single 30,848 67.1% 6,579 21.3% 33 1591.7 12170.3
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 9 0.9% 2 22.2% 1 14.9 32.8
JOURNAL 121 12.1% 16 13.2% 2 9.7 49.2
EXACT JOURNAL 22 2.2% 9 40.9% 1 1.8 2.0
SUBJECT 791 79.3% 190 24.0% 2 7.9 39.6
EXACT SUBJECT 54 5.4% 6 11.1% 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 997 100% 223 22.4% 2 7.7 39.4
LIMITS:
Number of times limits (bit strings) used: 3,229
Use by bit string (percentage):
Current year minus 5 30.3%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.2%
Current year minus 1 0.2%
Current year 0.3%
English Language 29.6%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.3%
XS Adolescence 0.4%
XS Adult 0.0%
XS Aged 0.6%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 11.7%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.1%
XS Middle Age 1.1%
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 18.6%
PT Journal Article 0.5%
SUBSET AIM 2.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 17,794
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.5%
Percentage of ORs 5.5%
Percentage of AND NOTs 2.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
BRIEF 61.8%
LONG 1.2%
MEDLINE 0.8%
FIELDS 4.4%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 26.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.4%
Ten most frequent errors:
1. NS command - no next screen 38.4%
2. First word of command is invalid 25.1%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 2.1%
6. Search term missing from search command 2.0%
7. Add-on search with invalid index name 1.8%
8. Valid command at an inappropriate time 1.7%
9. DISPLAY command - no FIND results 1.6%
10. 1185 1.5%
11. All others 15.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 17.6%
2. LOCATE (article dbs w/o monographs) 12.3%
3. FIND 8.8%
4. Unrecognized term 6.7%
5. MEDLINE BACKFILES 6.7%
6. COMMANDS 6.1%
7. INDEXES 3.8%
8. ADD-ON SEARCH 3.4%
9. DATABASES 3.0%
10. DISPLAY 2.8%
11. All others 30.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.7%
2. First word of command is invalid 14.1%
3. FIND command with invalid index name 7.3%
4. DISPLAY command-first of >1 screen 6.4%
5. DISPLAY command - middle of >1 screen 5.3%
6. FIND command retrieves >1 book 4.8%
7. NS command - no next screen 2.9%
8. Add-on without index name 2.5%
9. DISPLAY command-complete in one screen 2.4%
10. DISPLAY command - last of >1 screen 2.2%
11. All others 28.9%
Ten most frequent SHOW requests:
1. HISTORY 55.3%
2. SEARCH 23.4%
3. SETTINGS 8.2%
4. MEDLINE NEWS 5.6%
5. MAIL STATUS 2.9%
6. UPDATE 1.9%
7. MEDLINE GLOSSARY 0.8%
8. 0241 0.5%
9. LOCATION 0.3%
10. 0240 0.3%
11. All others 0.8%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)