MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/01/00 through 09/30/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 878 3,077 3,955
Davis 164 3,162 656 3,982
Irvine 0 1,775 0 1,775
Los Angeles 0 1,769 823 2,592
Riverside 0 163 251 414
San Diego 596 2,667 294 3,557
San Francisco 461 0 6,667 7,128
Santa Barbara 0 66 179 245
Santa Cruz 70 38 308 416
Stanford 1,222
Other (including DLA) 0 0 8,662 8,662
_______________ _________ _________ _________
Total: 1,291 10,518 20,917 33,948
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 24,387 77,383 922,908
MED90 database 4,302 9,343 68,629
MED85 database 2,305 4,526 40,125
MED80 database 1,453 3,019 25,139
MED75 database 878 1,802 15,660
MED66 database 623 1,360 10,898
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 444 1,005 10,928
2-4 a.m. 145 304 3,978
4-6 a.m. 166 403 3,332
6-8 a.m. 715 2,059 19,613
8-10 a.m. 3,716 10,150 104,208
10-12 a.m. 6,365 18,302 187,391
12-2 p.m. 6,250 17,687 188,118
2-4 p.m. 6,868 20,117 204,842
4-6 p.m. 5,076 14,836 173,881
6-8 p.m. 2,112 6,087 105,113
8-10 p.m. 1,239 3,844 51,560
10-12 p.m. 852 2,639 30,395
__________ __________ __________ _________________
Total: 33,948 97,433 1,083,359
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 15:41 14:23 17:33 14:23
Median 10:37 8:53 11:41 9:02
Total:
Average 15:41 14:23 17:33 14:23
Median 10:37 8:53 11:41 9:02
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 3.1
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 33,948 100%
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 788.6
Retrievals per search - median 9.0
Retrievals per search - standard deviation 7689.2
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 59.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 74,155 24.7%
DISPLAY (excluding automatic displays) 107,067 35.6%
BROWSE 1,640 0.5%
SELECT 822 0.3%
HELP 2,306 0.8%
EXPLAIN 1,863 0.6%
SAVE 23,804 7.9%
SET/RESET 15,744 5.2%
SHOW 1,254 0.4%
ADD-ON (AND, OR, AND NOT) 19,133 6.4%
LOGON or LOGOFF 38,450 12.8%
COMMENT 0 0.0%
OTHER 14,452 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 31,250 30.0% 6,106 19.5% 13 113.8 683.1
TITLE WORD 11,954 11.5% 3,761 31.5% 6 448.5 3069.2
EXACT TITLE 645 0.6% 293 45.4% 1 45.8 295.9
JOURNAL 4,568 4.4% 1,368 29.9% 135 2145.8 6323.2
EXACT JOURNAL 1,395 1.3% 420 30.1% 301 1813.6 4288.8
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 37,707 36.2% 7,342 19.5% 27 1442.5 12198.8
SUBJECT WORD 138 0.1% 45 32.6% 136 8293.8 39582.0
SUBJECT 2,939 2.8% 1,070 36.4% 187 4133.0 14704.1
MAJOR SUBJECT 219 0.2% 41 18.7% 246 1970.5 5315.8
EXACT SUBJECT 1,692 1.6% 302 17.8% 78 1621.4 5579.0
MAJOR XS 184 0.2% 40 21.7% 275 1205.3 3764.0
EXPLODE XS 751 0.7% 116 15.4% 101 4247.4 17164.0
EXPLODE MAJOR 171 0.2% 18 10.5% 796 9201.3 23576.1
TREE NUMBER 1 0.0% 0 0.0% 13,744 13744.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4,481 4.3% 609 13.6% 13 229.5 1173.8
LANGUAGE 2,477 2.4% 96 3.9% 79 801.3 0.0
PUB TYPE 1,615 1.6% 139 8.6% 38 531.7 3744.7
Other indexes 1,718 1.6% 215 12.5% 1 190.1 2463.4
By number of indexes:
Multiple 30,035 32.3% 6,450 21.5% 11 446.2 4871.4
Single 63,018 67.7% 12,884 20.4% 29 1312.5 10134.8
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 98 6.1% 9 9.2% 3 24.1 73.0
JOURNAL 262 16.2% 56 21.4% 1 7.8 30.2
EXACT JOURNAL 53 3.3% 6 11.3% 1 3.5 7.8
SUBJECT 1,124 69.6% 201 17.9% 3 23.6 284.1
EXACT SUBJECT 78 4.8% 16 20.5% 1 1.0 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 1,615 100% 288 17.8% 2 19.4 238.1
LIMITS:
Number of times limits (bit strings) used: 6,313
Use by bit string (percentage):
Current year minus 5 15.5%
Current year minus 4 0.0%
Current year minus 3 1.6%
Current year minus 2 0.3%
Current year minus 1 0.3%
Current year 0.3%
English Language 41.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.4%
XS Adult 0.2%
XS Aged 0.5%
XS Animal 0.7%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 9.8%
XS Infant 0.0%
XS Infant, Newborn 0.4%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.1%
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 24.4%
PT Journal Article 0.2%
SUBSET AIM 1.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 35,117
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 3.5%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
BRIEF 64.2%
LONG 1.0%
MEDLINE 1.2%
FIELDS 3.2%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.9%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.9%
Ten most frequent errors:
1. NS command - no next screen 39.2%
2. First word of command is invalid 26.0%
3. FIND command with invalid index name 6.7%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 1.9%
6. Add-on search with invalid index name 1.9%
7. Valid command at an inappropriate time 1.8%
8. Search term missing from search command 1.7%
9. Command containing escape or arrow key 1.1%
10. DISPLAY command - no FIND results 1.1%
11. All others 14.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.5%
2. LOCATE (article dbs w/o monographs) 11.8%
3. FIND 8.6%
4. MEDLINE BACKFILES 7.6%
5. Unrecognized term 5.0%
6. ADD-ON SEARCH 4.1%
7. DATABASES 3.9%
8. COMMANDS 3.9%
9. DISPLAY 3.6%
10. INDEXES 3.5%
11. All others 31.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.8%
2. First word of command is invalid 14.8%
3. FIND command with invalid index name 7.2%
4. DISPLAY command-first of >1 screen 5.9%
5. FIND command retrieves >1 book 5.3%
6. DISPLAY command - middle of >1 screen 4.1%
7. NS command - no next screen 3.0%
8. NS of SHOW/EXP command-no next screen 2.4%
9. FIND command with zero results 2.2%
10. DISPLAY command-complete in one screen 2.1%
11. All others 32.6%
Ten most frequent SHOW requests:
1. HISTORY 70.8%
2. SEARCH 17.0%
3. MAIL STATUS 3.7%
4. SETTINGS 2.7%
5. MAIL SETTINGS 1.2%
6. MEDLINE GLOSSARY 1.1%
7. UPDATE 0.9%
8. MEDLINE STATISTICS 0.5%
9. DISPLAY 0.2%
10. FIND DISPLAY 0.2%
11. All others 1.7%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)