MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 05/01/01 through 05/31/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 445 2,121 2,566
Davis 175 3,119 379 3,673
Irvine 0 1,917 0 1,917
Los Angeles 0 76 849 925
Riverside 0 74 169 243
San Diego 448 2,077 154 2,679
San Francisco 464 0 5,548 6,012
Santa Barbara 0 14 110 124
Santa Cruz 50 44 266 360
Stanford 1,289
Other (including DLA) 0 0 8,774 8,774
_______________ _________ _________ _________
Total: 1,137 7,766 18,370 28,562
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 20,449 66,048 765,943
MED90 database 3,533 7,655 72,079
MED85 database 1,891 3,757 48,887
MED80 database 1,285 2,543 36,589
MED75 database 753 1,407 29,018
MED66 database 651 1,392 44,376
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 291 873 9,675
2-4 a.m. 211 510 5,969
4-6 a.m. 237 389 3,500
6-8 a.m. 690 1,769 19,974
8-10 a.m. 3,304 9,790 205,095
10-12 a.m. 5,469 15,840 151,706
12-2 p.m. 4,981 13,778 153,458
2-4 p.m. 5,414 15,664 152,816
4-6 p.m. 4,133 12,396 144,489
6-8 p.m. 2,009 6,067 89,260
8-10 p.m. 1,099 3,459 33,621
10-12 p.m. 724 2,267 27,329
__________ __________ __________ _________________
Total: 28,562 82,802 996,892
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 15:10 13:57 21:58 14:09
Median 9:12 8:39 13:03 8:42
Total:
Average 15:10 13:57 21:58 14:09
Median 9:12 8:39 13:03 8:42
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 1.6
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 28,562 100%
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 881.1
Retrievals per search - median 8.0
Retrievals per search - standard deviation 9230.9
Percent of searches completed with 0 results 20.6%
Percent of searches entered that are long 0.4%
Percent of long searches completed 65.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 62,901 25.8%
DISPLAY (excluding automatic displays) 87,112 35.7%
BROWSE 1,246 0.5%
SELECT 618 0.3%
HELP 1,177 0.5%
EXPLAIN 1,150 0.5%
SAVE 15,869 6.5%
SET/RESET 13,932 5.7%
SHOW 830 0.3%
ADD-ON (AND, OR, AND NOT) 15,996 6.6%
LOGON or LOGOFF 31,678 13.0%
COMMENT 2 0.0%
OTHER 11,684 4.8%
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 28,856 32.4% 6,009 20.8% 12 124.2 882.1
TITLE WORD 10,802 12.1% 3,446 31.9% 8 575.0 4163.4
EXACT TITLE 534 0.6% 247 46.3% 1 65.3 721.0
JOURNAL 4,397 4.9% 1,379 31.4% 43 2393.3 9029.3
EXACT JOURNAL 1,288 1.4% 330 25.6% 227 2101.8 4249.9
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 30,439 34.1% 5,583 18.3% 28 1646.8 14253.5
SUBJECT WORD 78 0.1% 25 32.1% 26 22520.8 86411.8
SUBJECT 2,136 2.4% 714 33.4% 203 4938.0 22803.3
MAJOR SUBJECT 206 0.2% 33 16.0% 171 2875.5 7962.6
EXACT SUBJECT 859 1.0% 175 20.4% 75 1859.9 7885.0
MAJOR XS 147 0.2% 12 8.2% 158 1644.8 3417.4
EXPLODE XS 370 0.4% 55 14.9% 71 6367.9 20944.3
EXPLODE MAJOR 50 0.1% 2 4.0% 90 16372.6 39486.0
TREE NUMBER 2 0.0% 0 0.0% 11,108 11107.5 14521.9
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4,800 5.4% 837 17.4% 9 186.7 1200.4
LANGUAGE 1,534 1.7% 92 6.0% 95 1016.5 0.0
PUB TYPE 1,226 1.4% 99 8.1% 31 362.3 2642.4
Other indexes 1,230 1.4% 157 12.8% 1 427.4 4941.2
By number of indexes:
Multiple 26,146 33.2% 5,747 22.0% 10 484.8 6836.7
Single 52,562 66.8% 10,657 20.3% 29 1494.3 12013.0
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 46 3.8% 4 8.7% 2 8.0 14.9
JOURNAL 358 29.2% 91 25.4% 1 12.1 74.0
EXACT JOURNAL 29 2.4% 6 20.7% 1 3.3 4.4
SUBJECT 740 60.4% 168 22.7% 2 15.1 110.1
EXACT SUBJECT 50 4.1% 7 14.0% 1 1.0 0.2
TREE NUMBER 3 0.2% 0 0.0% 105 88.7 73.9
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 1,226 100% 276 22.5% 2 13.3 94.2
LIMITS:
Number of times limits (bit strings) used: 4,938
Use by bit string (percentage):
Current year minus 5 25.0%
Current year minus 4 0.0%
Current year minus 3 1.2%
Current year minus 2 0.4%
Current year minus 1 0.4%
Current year 0.5%
English Language 32.8%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.1%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 0.3%
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 0.1%
XS Human 8.3%
XS Infant 0.0%
XS Infant, Newborn 0.3%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.4%
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 25.3%
PT Journal Article 0.0%
SUBSET AIM 1.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 30,253
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.7%
Percentage of ORs 3.6%
Percentage of AND NOTs 1.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
BRIEF 62.4%
LONG 0.9%
MEDLINE 1.3%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
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 8.3%
Ten most frequent errors:
1. NS command - no next screen 41.3%
2. First word of command is invalid 25.0%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 4.2%
5. Add-on search with invalid index name 1.9%
6. PS command - no previous screen 1.7%
7. Search term missing from search command 1.7%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command - no FIND results 1.2%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 11.9%
2. LOCATE (article dbs w/o monographs) 10.8%
3. MEDLINE BACKFILES 9.0%
4. FIND 8.9%
5. Unrecognized term 7.7%
6. INDEXES 6.3%
7. COMMANDS 4.2%
8. DATABASES 3.9%
9. MAIL 3.3%
10. DISPLAY 3.1%
11. All others 29.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.8%
2. First word of command is invalid 14.6%
3. FIND command with invalid index name 7.3%
4. DISPLAY command-first of >1 screen 6.5%
5. DISPLAY command - middle of >1 screen 5.0%
6. FIND command retrieves >1 book 4.2%
7. NS command - no next screen 3.1%
8. DISPLAY command - last of >1 screen 3.0%
9. NS of SHOW/EXP command-no next screen 2.9%
10. FIND command with zero results 2.2%
11. All others 31.0%
Ten most frequent SHOW requests:
1. HISTORY 74.1%
2. SEARCH 11.5%
3. MAIL STATUS 6.3%
4. SETTINGS 1.8%
5. MAIL SETTINGS 1.1%
6. MEDLINE NEWS 1.1%
7. MEDLINE GLOSSARY 0.7%
8. MEDLINE LOADING STATISTICS 0.5%
9. DATABASES 0.5%
10. MEDLINE STATISTICS 0.4%
11. All others 2.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)