MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/11/01 through 08/17/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 53 441 494
Davis 15 406 101 522
Irvine 0 371 0 371
Los Angeles 0 9 134 143
Riverside 0 4 44 48
San Diego 93 448 55 596
San Francisco 73 0 1,267 1,340
Santa Barbara 0 0 16 16
Santa Cruz 64 2 28 94
Stanford 199
Other (including DLA) 0 0 1,832 1,832
_______________ _________ _________ _________
Total: 245 1,293 3,918 5,655
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,906 12,592 134,312
MED90 database 745 1,706 9,244
MED85 database 437 887 4,806
MED80 database 272 563 3,022
MED75 database 170 315 1,834
MED66 database 125 301 1,957
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 30 89 677
2-4 a.m. 25 70 643
4-6 a.m. 57 114 1,378
6-8 a.m. 136 382 5,091
8-10 a.m. 669 2,093 15,525
10-12 a.m. 1,146 3,334 34,778
12-2 p.m. 1,068 2,976 26,324
2-4 p.m. 1,134 3,449 30,249
4-6 p.m. 760 2,040 18,228
6-8 p.m. 343 951 11,054
8-10 p.m. 162 470 7,623
10-12 p.m. 125 396 3,605
__________ __________ __________ _________________
Total: 5,655 16,364 155,175
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 24:10 14:30 33:31 15:10
Median 14:49 8:37 15:19 9:23
Total:
Average 24:10 14:30 33:31 15:10
Median 14:49 8:37 15:19 9:23
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.5
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 5,655 100%
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 822.3
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7421.3
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed 69.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 11,945 25.8%
DISPLAY (excluding automatic displays) 16,210 35.1%
BROWSE 234 0.5%
SELECT 102 0.2%
HELP 182 0.4%
EXPLAIN 145 0.3%
SAVE 2,987 6.5%
SET/RESET 3,128 6.8%
SHOW 115 0.2%
ADD-ON (AND, OR, AND NOT) 3,719 8.0%
LOGON or LOGOFF 5,438 11.8%
COMMENT 0 0.0%
OTHER 2,025 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 5,473 31.3% 948 17.3% 11 110.6 624.7
TITLE WORD 2,357 13.5% 787 33.4% 5 261.0 1656.1
EXACT TITLE 90 0.5% 47 52.2% 1 8.1 24.2
JOURNAL 1,033 5.9% 273 26.4% 427 2275.3 5373.7
EXACT JOURNAL 357 2.0% 199 55.7% 115 1614.9 3278.4
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 5,293 30.3% 1,046 19.8% 27 1406.8 10995.4
SUBJECT WORD 7 0.0% 5 71.4% 251 251.0 123.0
SUBJECT 340 1.9% 92 27.1% 141 11700.1 33153.9
MAJOR SUBJECT 20 0.1% 2 10.0% 738 3162.2 5882.1
EXACT SUBJECT 267 1.5% 49 18.4% 68 2266.3 8592.0
MAJOR XS 51 0.3% 3 5.9% 114 1005.8 2069.3
EXPLODE XS 87 0.5% 6 6.9% 70 7625.6 17694.5
EXPLODE MAJOR 10 0.1% 0 0.0% 214 3817.4 6046.7
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 1,194 6.8% 107 9.0% 15 204.3 1047.6
LANGUAGE 442 2.5% 25 5.7% 77 959.6 0.0
PUB TYPE 234 1.3% 13 5.6% 23 122.5 336.0
Other indexes 193 1.1% 29 15.0% 1 46.2 260.9
By number of indexes:
Multiple 5,501 35.2% 1,056 19.2% 9 472.5 5182.0
Single 10,126 64.8% 2,126 21.0% 29 1409.1 9834.0
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 8 3.4% 0 0.0% 3 9.4 12.8
JOURNAL 88 37.6% 17 19.3% 2 7.5 21.4
EXACT JOURNAL 3 1.3% 1 33.3% 1 1.0 0.0
SUBJECT 114 48.7% 31 27.2% 3 17.0 75.3
EXACT SUBJECT 21 9.0% 0 0.0% 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 234 100% 49 20.9% 2 11.0 52.3
LIMITS:
Number of times limits (bit strings) used: 1,147
Use by bit string (percentage):
Current year minus 5 27.2%
Current year minus 4 0.0%
Current year minus 3 0.7%
Current year minus 2 0.2%
Current year minus 1 0.3%
Current year 1.0%
English Language 37.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.1%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.1%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 11.1%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.4%
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 17.8%
PT Journal Article 0.1%
SUBSET AIM 2.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,273
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.6%
Percentage of ORs 3.8%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
BRIEF 63.3%
LONG 1.2%
MEDLINE 0.9%
FIELDS 4.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.8%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 25.1%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. NS command - no next screen 41.9%
2. First word of command is invalid 24.4%
3. FIND command with invalid index name 5.8%
4. DISPLAY command contains invalid word 3.7%
5. Add-on search with invalid index name 2.1%
6. Search term missing from search command 1.8%
7. PS command - no previous screen 1.7%
8. Valid command at an inappropriate time 1.4%
9. DISPLAY command-record numbers too large 1.2%
10. DISPLAY command - no FIND results 1.1%
11. All others 14.9%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 17.9%
2. MEDLINE BACKFILES 11.7%
3. FIND 7.6%
4. INDEXES 6.9%
5. Unrecognized term 6.2%
6. 1752 6.2%
7. LOCATE (article dbs w/o monographs) 5.5%
8. DISPLAY 4.8%
9. COMMANDS 4.8%
10. DATABASES 4.1%
11. All others 28.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 26.9%
2. First word of command is invalid 12.5%
3. FIND command with invalid index name 5.5%
4. FIND command with zero results 4.9%
5. FIND command retrieves >1 book 4.9%
6. DISPLAY command-first of >1 screen 4.9%
7. NS command - no next screen 3.7%
8. SET command with invalid setting 3.4%
9. Multi-index search with zero results 3.1%
10. PS command - no previous screen 2.1%
11. All others 24.1%
Ten most frequent SHOW requests:
1. HISTORY 74.1%
2. SEARCH 16.5%
3. SETTINGS 4.7%
4. MAIL STATUS 2.4%
5. MAIL SETTINGS 1.2%
6. MEDLINE GLOSSARY 1.2%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)