MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/15/01 through 09/21/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 77 507 584
Davis 14 348 49 411
Irvine 0 411 0 411
Los Angeles 0 17 91 108
Riverside 0 2 30 32
San Diego 88 390 6 484
San Francisco 64 0 832 896
Santa Barbara 0 3 57 60
Santa Cruz 0 1 12 13
Stanford 89
Other (including DLA) 0 0 1,702 1,702
_______________ _________ _________ _________
Total: 166 1,249 3,286 4,790
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,526 10,649 106,562
MED90 database 540 1,149 6,794
MED85 database 299 576 3,251
MED80 database 201 417 2,037
MED75 database 122 209 1,694
MED66 database 102 217 747
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 30 113 1,488
2-4 a.m. 15 41 524
4-6 a.m. 38 74 374
6-8 a.m. 122 445 3,559
8-10 a.m. 651 1,585 10,216
10-12 a.m. 898 2,316 15,937
12-2 p.m. 830 2,344 24,235
2-4 p.m. 995 2,756 25,439
4-6 p.m. 714 2,003 22,355
6-8 p.m. 321 839 10,227
8-10 p.m. 105 413 3,376
10-12 p.m. 71 288 3,355
__________ __________ __________ _________________
Total: 4,790 13,217 121,085
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 20:06 14:46 23:37 14:50
Median 13:33 9:22 14:45 9:39
Total:
Average 20:06 14:46 23:37 14:50
Median 13:33 9:22 14:45 9:39
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 4,790 100%
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 749.0
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7564.4
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.3%
Percent of long searches completed 61.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 9,817 25.8%
DISPLAY (excluding automatic displays) 13,370 35.1%
BROWSE 152 0.4%
SELECT 95 0.2%
HELP 229 0.6%
EXPLAIN 206 0.5%
SAVE 2,276 6.0%
SET/RESET 2,546 6.7%
SHOW 113 0.3%
ADD-ON (AND, OR, AND NOT) 2,672 7.0%
LOGON or LOGOFF 4,873 12.8%
COMMENT 0 0.0%
OTHER 1,770 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 4,025 28.9% 809 20.1% 13 118.9 585.6
TITLE WORD 1,962 14.1% 639 32.6% 6 505.8 4618.5
EXACT TITLE 272 2.0% 102 37.5% 1 17.0 117.4
JOURNAL 667 4.8% 206 30.9% 268 2206.9 6076.5
EXACT JOURNAL 458 3.3% 163 35.6% 531 2015.4 4086.1
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 4,566 32.8% 790 17.3% 29 1520.1 13070.3
SUBJECT WORD 2 0.0% 1 50.0% 17 17.0 0.0
SUBJECT 263 1.9% 106 40.3% 273 4330.4 9492.5
MAJOR SUBJECT 29 0.2% 6 20.7% 437 1729.0 3652.5
EXACT SUBJECT 166 1.2% 31 18.7% 110 1551.1 3580.3
MAJOR XS 23 0.2% 6 26.1% 88 374.8 1029.6
EXPLODE XS 49 0.4% 7 14.3% 39 6256.5 27315.2
EXPLODE MAJOR 7 0.1% 1 14.3% 133 250.3 318.0
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 899 6.5% 127 14.1% 20 168.4 504.3
LANGUAGE 242 1.7% 15 6.2% 56 796.6 0.0
PUB TYPE 152 1.1% 22 14.5% 31 408.1 1121.3
Other indexes 105 0.8% 14 13.3% 1 47.6 260.7
By number of indexes:
Multiple 4,015 32.2% 873 21.7% 9 269.6 3434.2
Single 8,444 67.8% 1,793 21.2% 32 1341.5 10344.4
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 4 2.6% 1 25.0% 4 6.0 6.2
JOURNAL 41 27.0% 8 19.5% 2 5.5 6.8
EXACT JOURNAL 3 2.0% 0 0.0% 1 3.0 3.5
SUBJECT 96 63.2% 17 17.7% 2 6.4 12.5
EXACT SUBJECT 8 5.3% 2 25.0% 17 15.0 7.7
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 152 100% 28 18.4% 2 6.5 10.9
LIMITS:
Number of times limits (bit strings) used: 845
Use by bit string (percentage):
Current year minus 5 36.2%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.4%
Current year minus 1 0.6%
Current year 0.2%
English Language 29.8%
French Language 0.0%
Japanese Language 0.0%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.9%
XS Adolescence 0.0%
XS Adult 0.0%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 8.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
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 16.9%
PT Journal Article 0.1%
SUBSET AIM 3.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,529
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 97.2%
Percentage of ORs 2.1%
Percentage of AND NOTs 0.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
BRIEF 62.9%
LONG 1.4%
MEDLINE 0.6%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 0.7%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.3%
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 41.1%
2. First word of command is invalid 26.1%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 2.0%
6. Add-on search with invalid index name 1.8%
7. Search term missing from search command 1.6%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command-record numbers too large 1.0%
10. Command containing escape or arrow key 0.8%
11. All others 13.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 16.0%
2. BOOKS DATABASE 13.6%
3. FIND 8.7%
4. DATABASES 6.3%
5. INDEXES 5.8%
6. Unrecognized term 5.3%
7. MEDLINE BACKFILES 4.4%
8. DISPLAY 3.9%
9. ADD-ON SEARCH 3.4%
10. DATES INDEX 2.4%
11. All others 25.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.5%
2. First word of command is invalid 13.3%
3. FIND command with invalid index name 10.3%
4. DISPLAY command-first of >1 screen 9.4%
5. DISPLAY command - middle of >1 screen 4.4%
6. FIND command retrieves >1 book 4.1%
7. DISPLAY command - last of >1 screen 3.2%
8. NS command - no next screen 2.5%
9. FIND command with zero results 2.5%
10. SET command with invalid setting 2.3%
11. All others 30.1%
Ten most frequent SHOW requests:
1. HISTORY 51.8%
2. SEARCH 25.0%
3. MAIL STATUS 8.0%
4. TIMEOUT SETTING 6.3%
5. MEDLINE GLOSSARY 1.8%
6. DATABASES 1.8%
7. TIME 0.9%
8. MAIL SETTINGS 0.9%
9. DISPLAY 0.9%
10. SETTINGS 0.9%
11. All others 1.8%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)