MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/19/01 through 05/25/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 68 453 521
Davis 66 802 93 961
Irvine 0 421 0 421
Los Angeles 0 11 169 180
Riverside 0 13 24 37
San Diego 75 448 18 541
San Francisco 92 0 1,321 1,413
Santa Barbara 0 3 38 41
Santa Cruz 5 2 37 44
Stanford 262
Other (including DLA) 0 0 1,787 1,787
_______________ _________ _________ _________
Total: 238 1,768 3,940 6,208
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,490 15,062 154,042
MED90 database 753 1,671 10,567
MED85 database 404 892 5,554
MED80 database 257 529 2,276
MED75 database 157 306 1,699
MED66 database 147 339 2,107
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 43 160 1,872
2-4 a.m. 53 116 747
4-6 a.m. 43 51 262
6-8 a.m. 140 350 2,515
8-10 a.m. 749 2,190 22,898
10-12 a.m. 1,282 3,867 34,052
12-2 p.m. 1,072 3,081 32,159
2-4 p.m. 1,185 3,591 34,364
4-6 p.m. 913 3,043 26,636
6-8 p.m. 370 1,207 10,825
8-10 p.m. 197 610 5,459
10-12 p.m. 161 533 4,456
__________ __________ __________ _________________
Total: 6,208 18,799 176,245
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 12:07 13:09 32:02 13:51
Median 8:30 8:21 13:42 8:25
Total:
Average 12:07 13:09 32:02 13:51
Median 8:30 8:21 13:42 8:25
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 6,208 100%
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 739.7
Retrievals per search - median 8.0
Retrievals per search - standard deviation 6506.9
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.3%
Percent of long searches completed 66.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,339 26.6%
DISPLAY (excluding automatic displays) 19,393 36.0%
BROWSE 338 0.6%
SELECT 170 0.3%
HELP 244 0.5%
EXPLAIN 232 0.4%
SAVE 3,010 5.6%
SET/RESET 3,022 5.6%
SHOW 178 0.3%
ADD-ON (AND, OR, AND NOT) 3,605 6.7%
LOGON or LOGOFF 6,829 12.7%
COMMENT 0 0.0%
OTHER 2,451 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 6,926 34.4% 1,356 19.6% 13 159.5 1171.4
TITLE WORD 2,239 11.1% 735 32.8% 8 942.2 5739.1
EXACT TITLE 121 0.6% 40 33.1% 1 154.1 1330.1
JOURNAL 1,011 5.0% 328 32.4% 25 1748.8 6762.4
EXACT JOURNAL 235 1.2% 65 27.7% 124 1879.7 3944.6
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 6,765 33.6% 1,298 19.2% 28 1538.4 10769.4
SUBJECT WORD 12 0.1% 4 33.3% 14 72.4 130.4
SUBJECT 450 2.2% 151 33.6% 144 2659.5 9897.8
MAJOR SUBJECT 34 0.2% 11 32.4% 446 1518.5 3404.3
EXACT SUBJECT 185 0.9% 43 23.2% 58 1038.3 4655.2
MAJOR XS 38 0.2% 5 13.2% 65 1005.2 1686.3
EXPLODE XS 94 0.5% 9 9.6% 47 1240.1 2850.4
EXPLODE MAJOR 10 0.0% 0 0.0% 28 194.0 521.7
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 1,054 5.2% 151 14.3% 8 127.7 482.1
LANGUAGE 260 1.3% 12 4.6% 114 1057.1 0.0
PUB TYPE 330 1.6% 27 8.2% 33 298.6 1125.7
Other indexes 391 1.9% 48 12.3% 1 4.7 32.1
By number of indexes:
Multiple 5,790 32.4% 1,315 22.7% 9 235.0 1883.2
Single 12,106 67.6% 2,419 20.0% 28 1311.8 8909.0
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 9 2.7% 0 0.0% 1 1.9 2.3
JOURNAL 107 32.4% 39 36.4% 2 18.2 56.3
EXACT JOURNAL 7 2.1% 2 28.6% 1 2.0 2.2
SUBJECT 196 59.4% 36 18.4% 2 11.0 57.7
EXACT SUBJECT 11 3.3% 2 18.2% 1 1.1 0.3
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 330 100% 79 23.9% 2 12.1 54.6
LIMITS:
Number of times limits (bit strings) used: 981
Use by bit string (percentage):
Current year minus 5 25.6%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.6%
Current year minus 1 0.2%
Current year 0.4%
English Language 28.8%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.4%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.7%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 9.3%
XS Infant 0.0%
XS Infant, Newborn 0.7%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.6%
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 28.7%
PT Journal Article 0.1%
SUBSET AIM 1.6%
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: 6,696
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 3.4%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
BRIEF 62.3%
LONG 1.0%
MEDLINE 1.3%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.0%
Ten most frequent errors:
1. NS command - no next screen 41.4%
2. First word of command is invalid 25.1%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 2.0%
6. Search term missing from search command 1.6%
7. Add-on search with invalid index name 1.6%
8. DISPLAY command-record numbers too large 1.5%
9. Valid command at an inappropriate time 1.2%
10. Command containing escape or arrow key 1.1%
11. All others 13.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.9%
2. LOCATE (article dbs w/o monographs) 8.6%
3. MEDLINE BACKFILES 8.2%
4. FIND 8.2%
5. Unrecognized term 7.3%
6. INDEXES 6.0%
7. MAIL 5.2%
8. DATABASES 4.3%
9. DISPLAY 4.3%
10. COMMANDS 3.9%
11. All others 31.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.2%
2. First word of command is invalid 13.7%
3. DISPLAY command - middle of >1 screen 6.1%
4. FIND command with invalid index name 5.7%
5. DISPLAY command-first of >1 screen 5.7%
6. NS command - no next screen 3.4%
7. FIND command with zero results 3.4%
8. FIND command retrieves >1 book 3.4%
9. NS of SHOW/EXP command-no next screen 3.2%
10. Add-on without index name 2.9%
11. All others 31.0%
Ten most frequent SHOW requests:
1. HISTORY 75.9%
2. SEARCH 8.0%
3. MAIL STATUS 3.6%
4. MAIL SETTINGS 2.2%
5. MEDLINE GLOSSARY 1.5%
6. MEDLINE LOADING STATISTICS 1.5%
7. MEDLINE NEWS 1.5%
8. DATABASES 1.5%
9. B394 0.7%
10. 0026 0.7%
11. All others 2.9%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)