MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/04/01 through 08/10/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 69 459 528
Davis 15 447 93 555
Irvine 0 293 0 293
Los Angeles 0 42 79 121
Riverside 0 10 48 58
San Diego 68 335 19 422
San Francisco 85 0 1,339 1,424
Santa Barbara 0 1 40 41
Santa Cruz 22 8 53 83
Stanford 257
Other (including DLA) 0 0 1,714 1,714
_______________ _________ _________ _________
Total: 190 1,205 3,844 5,496
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,843 11,843 148,874
MED90 database 686 1,485 8,423
MED85 database 407 791 3,437
MED80 database 298 609 3,575
MED75 database 152 266 1,746
MED66 database 110 234 1,284
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 53 192 2,534
2-4 a.m. 30 56 811
4-6 a.m. 50 103 974
6-8 a.m. 176 480 3,404
8-10 a.m. 581 1,601 16,274
10-12 a.m. 1,113 2,919 25,836
12-2 p.m. 900 2,672 40,213
2-4 p.m. 1,075 2,938 27,565
4-6 p.m. 856 2,470 28,331
6-8 p.m. 331 815 9,049
8-10 p.m. 181 565 6,604
10-12 p.m. 150 417 5,744
__________ __________ __________ _________________
Total: 5,496 15,228 167,339
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 18:17 14:05 24:32 14:16
Median 12:25 9:22 13:43 9:16
Total:
Average 18:17 14:05 24:32 14:16
Median 12:25 9:22 13:43 9:16
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.7
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 5,496 100%
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 819.5
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8564.2
Percent of searches completed with 0 results 20.8%
Percent of searches entered that are long 0.7%
Percent of long searches completed 68.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,420 25.2%
DISPLAY (excluding automatic displays) 16,315 36.0%
BROWSE 278 0.6%
SELECT 79 0.2%
HELP 178 0.4%
EXPLAIN 153 0.3%
SAVE 2,938 6.5%
SET/RESET 2,805 6.2%
SHOW 128 0.3%
ADD-ON (AND, OR, AND NOT) 3,116 6.9%
LOGON or LOGOFF 5,805 12.8%
COMMENT 0 0.0%
OTHER 2,123 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 5,093 30.8% 1,114 21.9% 12 149.2 1055.0
TITLE WORD 2,112 12.8% 748 35.4% 6 424.5 3737.4
EXACT TITLE 126 0.8% 62 49.2% 1 154.7 1066.9
JOURNAL 862 5.2% 229 26.6% 164 1890.7 4529.0
EXACT JOURNAL 235 1.4% 57 24.3% 612 1774.8 3356.2
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 5,452 33.0% 1,008 18.5% 28 1771.4 14559.5
SUBJECT WORD 17 0.1% 5 29.4% 33 57.8 78.6
SUBJECT 357 2.2% 101 28.3% 75 3133.3 16761.5
MAJOR SUBJECT 47 0.3% 5 10.6% 258 2317.9 6027.4
EXACT SUBJECT 260 1.6% 52 20.0% 67 2338.6 11042.5
MAJOR XS 45 0.3% 5 11.1% 167 1083.3 4327.1
EXPLODE XS 108 0.7% 22 20.4% 37 1618.9 3778.1
EXPLODE MAJOR 5 0.0% 0 0.0% 149193 89577.4 81632.1
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 868 5.3% 115 13.2% 22 179.9 494.7
LANGUAGE 445 2.7% 23 5.2% 70 1192.4 0.0
PUB TYPE 273 1.7% 23 8.4% 35 1002.6 9683.2
Other indexes 218 1.3% 26 11.9% 1 76.2 498.9
By number of indexes:
Multiple 5,051 34.9% 1,113 22.0% 12 599.5 8019.8
Single 9,429 65.1% 1,955 20.7% 31 1345.1 10694.4
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 4.7% 2 15.4% 3 5.9 11.7
JOURNAL 45 16.4% 11 24.4% 2 7.2 23.8
EXACT JOURNAL 13 4.7% 2 15.4% 2 3.0 3.3
SUBJECT 175 63.9% 53 30.3% 2 5.7 9.5
EXACT SUBJECT 28 10.2% 1 3.6% 1 1.5 2.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 1 0.4% 1 100% 0 0.0 0.0
Single 272 99.6% 67 24.6% 2 5.3 12.5
LIMITS:
Number of times limits (bit strings) used: 1,066
Use by bit string (percentage):
Current year minus 5 21.9%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.5%
Current year minus 1 0.2%
Current year 0.5%
English Language 42.3%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.2%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.8%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 8.3%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.5%
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 18.2%
PT Journal Article 0.5%
SUBSET AIM 3.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.3%
BOOLEAN:
Number of searches with Booleans: 5,998
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.3%
Percentage of ORs 4.2%
Percentage of AND NOTs 2.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
BRIEF 61.9%
LONG 1.1%
MEDLINE 1.1%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.2%
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 41.9%
2. First word of command is invalid 23.9%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 3.9%
5. Add-on search with invalid index name 1.8%
6. Search term missing from search command 1.7%
7. Valid command at an inappropriate time 1.6%
8. DISPLAY command - no FIND results 1.6%
9. PS command - no previous screen 1.6%
10. DISPLAY command-record numbers too large 1.3%
11. All others 13.8%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 19.6%
2. MEDLINE BACKFILES 9.8%
3. FIND 9.2%
4. LOCATE (article dbs w/o monographs) 8.5%
5. INDEXES 5.2%
6. COMMANDS 5.2%
7. MAIL 4.6%
8. Unrecognized term 4.6%
9. DISPLAY 3.3%
10. DATABASES 2.6%
11. All others 26.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.7%
2. First word of command is invalid 15.7%
3. FIND command with invalid index name 9.7%
4. DISPLAY command - middle of >1 screen 5.1%
5. DISPLAY command-first of >1 screen 3.9%
6. DISPLAY command-complete in one screen 3.6%
7. NS of SHOW/EXP command-no next screen 3.6%
8. NS command - no next screen 3.3%
9. Add-on without index name 3.0%
10. FIND command with zero results 2.7%
11. All others 27.5%
Ten most frequent SHOW requests:
1. HISTORY 70.2%
2. SEARCH 10.6%
3. MAIL STATUS 10.6%
4. SETTINGS 2.1%
5. STANFORD LIBRARY HOURS 1.1%
6. TIME 1.1%
7. MAIL SETTINGS 1.1%
8. DISPLAY 1.1%
9. MEDLINE GLOSSARY 1.1%
10. MEDLINE NEWS 1.1%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)