MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/21/01 through 07/27/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 63 527 590
Davis 26 446 104 576
Irvine 0 275 0 275
Los Angeles 0 1 100 101
Riverside 0 6 26 32
San Diego 66 392 67 525
San Francisco 86 0 1,273 1,359
Santa Barbara 0 3 26 29
Santa Cruz 1 6 87 94
Stanford 161
Other (including DLA) 0 0 1,830 1,830
_______________ _________ _________ _________
Total: 179 1,192 4,040 5,572
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,992 13,433 165,538
MED90 database 686 1,448 12,091
MED85 database 388 797 8,208
MED80 database 236 496 2,421
MED75 database 146 278 914
MED66 database 124 302 1,716
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 47 145 1,932
2-4 a.m. 22 67 585
4-6 a.m. 35 82 817
6-8 a.m. 177 440 3,964
8-10 a.m. 640 1,883 14,315
10-12 a.m. 1,194 3,488 28,630
12-2 p.m. 950 2,852 41,412
2-4 p.m. 1,129 3,403 49,064
4-6 p.m. 764 2,331 22,209
6-8 p.m. 262 1,087 16,830
8-10 p.m. 199 539 5,190
10-12 p.m. 153 437 5,940
__________ __________ __________ _________________
Total: 5,572 16,754 190,888
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 23:45 15:05 25:40 15:26
Median 15:48 10:11 17:59 10:29
Total:
Average 23:45 15:05 25:40 15:26
Median 15:48 10:11 17:59 10:29
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.2
transmission of response
Display - from receipt of command at DLA until 0.1 0.2
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 5,572 100%
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 1222.4
Retrievals per search - median 9.0
Retrievals per search - standard deviation 10826.7
Percent of searches completed with 0 results 20.1%
Percent of searches entered that are long 0.4%
Percent of long searches completed 67.1%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 12,435 26.2%
DISPLAY (excluding automatic displays) 16,345 34.4%
BROWSE 255 0.5%
SELECT 80 0.2%
HELP 253 0.5%
EXPLAIN 206 0.4%
SAVE 3,261 6.9%
SET/RESET 2,863 6.0%
SHOW 172 0.4%
ADD-ON (AND, OR, AND NOT) 3,581 7.5%
LOGON or LOGOFF 5,857 12.3%
COMMENT 0 0.0%
OTHER 2,178 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 5,554 31.1% 1,050 18.9% 11 99.9 624.6
TITLE WORD 2,532 14.2% 830 32.8% 7 3168.8 21349.4
EXACT TITLE 211 1.2% 99 46.9% 1 24.1 127.7
JOURNAL 940 5.3% 241 25.6% 465 2561.2 5835.1
EXACT JOURNAL 318 1.8% 75 23.6% 546 2421.1 5344.9
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 5,397 30.2% 1,048 19.4% 28 1379.8 11242.1
SUBJECT WORD 13 0.1% 9 69.2% 88 57703.0 115280
SUBJECT 524 2.9% 126 24.0% 257 6976.1 23511.5
MAJOR SUBJECT 17 0.1% 0 0.0% 199 1463.5 2906.2
EXACT SUBJECT 263 1.5% 47 17.9% 560 6083.3 16827.1
MAJOR XS 32 0.2% 3 9.4% 1,249 2604.6 3676.1
EXPLODE XS 132 0.7% 19 14.4% 401 15227.3 42785.0
EXPLODE MAJOR 12 0.1% 2 16.7% 83 5872.9 16700.5
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 993 5.6% 136 13.7% 20 179.5 464.2
LANGUAGE 411 2.3% 17 4.1% 64 1178.8 0.0
PUB TYPE 255 1.4% 23 9.0% 56 216.1 573.0
Other indexes 262 1.5% 43 16.4% 1 12.7 141.2
By number of indexes:
Multiple 5,417 33.9% 1,052 19.4% 11 960.5 9352.5
Single 10,554 66.1% 2,218 21.0% 30 1942.5 13707.2
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 6 2.4% 3 50.0% 19 135.7 217.8
JOURNAL 92 36.1% 15 16.3% 2 6.9 25.4
EXACT JOURNAL 2 0.8% 2 100% 0 0.0 0.0
SUBJECT 145 56.9% 29 20.0% 3 107.4 1078.6
EXACT SUBJECT 10 3.9% 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 255 100% 49 19.2% 2 65.1 809.8
LIMITS:
Number of times limits (bit strings) used: 1,096
Use by bit string (percentage):
Current year minus 5 25.2%
Current year minus 4 0.0%
Current year minus 3 1.3%
Current year minus 2 0.5%
Current year minus 1 0.6%
Current year 0.3%
English Language 40.1%
French Language 0.0%
Japanese Language 0.0%
German Language 0.2%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.0%
XS Adult 0.1%
XS Aged 0.2%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 6.8%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.5%
XS Rats 1.9%
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 18.9%
PT Journal Article 0.0%
SUBSET AIM 1.4%
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: 6,290
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.9%
Percentage of ORs 5.9%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
BRIEF 64.2%
LONG 1.7%
MEDLINE 1.2%
FIELDS 2.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 25.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 40.6%
2. First word of command is invalid 24.4%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 4.2%
5. Search term missing from search command 1.8%
6. Add-on search with invalid index name 1.7%
7. Valid command at an inappropriate time 1.7%
8. PS command - no previous screen 1.5%
9. DISPLAY command - no FIND results 1.3%
10. Command containing escape or arrow key 1.2%
11. All others 15.3%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 16.0%
2. Unrecognized term 9.7%
3. FIND 8.3%
4. LOCATE (article dbs w/o monographs) 6.8%
5. MEDLINE BACKFILES 6.3%
6. MAIL 3.9%
7. ADD-ON SEARCH 3.9%
8. INDEXES 3.4%
9. COMMANDS 3.4%
10. SAVE 2.9%
11. All others 27.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 25.1%
2. First word of command is invalid 11.1%
3. FIND command with invalid index name 8.9%
4. FIND command retrieves >1 book 5.9%
5. DISPLAY command-first of >1 screen 4.1%
6. DISPLAY command - last of >1 screen 3.9%
7. DISPLAY command - middle of >1 screen 3.7%
8. FIND command with zero results 3.5%
9. DISPLAY command-complete in one screen 3.1%
10. NS of SHOW/EXP command-no next screen 3.1%
11. All others 35.4%
Ten most frequent SHOW requests:
1. HISTORY 84.6%
2. SEARCH 6.9%
3. MEDLINE GLOSSARY 3.1%
4. SETTINGS 1.5%
5. MEDLINE NEWS 1.5%
6. 2207 0.8%
7. SYSTEM STATISTICS 0.8%
8. DATABASES 0.8%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)