MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 06/10/00 through 06/16/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 224 916 1,140
Davis 65 750 173 988
Irvine 0 396 0 396
Los Angeles 0 522 222 744
Riverside 0 30 59 89
San Diego 190 816 120 1,126
San Francisco 124 0 1,792 1,916
Santa Barbara 0 10 64 74
Santa Cruz 19 4 63 86
Stanford 372
Other (including DLA) 0 0 2,294 2,294
_______________ _________ _________ _________
Total: 398 2,752 5,703 9,225
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 6,487 21,273 229,612
MED90 database 1,250 2,876 19,458
MED85 database 666 1,400 9,196
MED80 database 386 734 5,090
MED75 database 255 528 4,528
MED66 database 181 396 1,852
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 125 305 3,077
2-4 a.m. 40 87 1,098
4-6 a.m. 25 97 1,840
6-8 a.m. 215 603 4,559
8-10 a.m. 1,072 3,081 30,380
10-12 a.m. 1,796 5,149 48,898
12-2 p.m. 1,606 4,689 43,924
2-4 p.m. 1,888 5,880 56,618
4-6 p.m. 1,353 4,072 38,737
6-8 p.m. 580 1,581 20,119
8-10 p.m. 302 887 9,702
10-12 p.m. 223 776 10,784
__________ __________ __________ _________________
Total: 9,225 27,207 269,736
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 17:58 14:23 22:32 14:25
Median 10:57 8:23 13:01 8:32
Total:
Average 17:58 14:23 22:32 14:25
Median 10:57 8:23 13:01 8:32
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.6
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 9,225 100%
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 1137.2
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8148.4
Percent of searches completed with 0 results 20.8%
Percent of searches entered that are long 0.3%
Percent of long searches completed 53.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 20,535 25.6%
DISPLAY (excluding automatic displays) 28,371 35.4%
BROWSE 389 0.5%
SELECT 228 0.3%
HELP 574 0.7%
EXPLAIN 424 0.5%
SAVE 5,579 7.0%
SET/RESET 4,357 5.4%
SHOW 285 0.4%
ADD-ON (AND, OR, AND NOT) 5,579 7.0%
LOGON or LOGOFF 10,269 12.8%
COMMENT 0 0.0%
OTHER 3,588 4.5%
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 9,090 31.3% 1,866 20.5% 11 95.9 607.7
TITLE WORD 3,077 10.6% 982 31.9% 7 342.6 2185.0
EXACT TITLE 192 0.7% 90 46.9% 1 38.7 188.5
JOURNAL 1,330 4.6% 381 28.6% 134 2048.4 5952.8
EXACT JOURNAL 274 0.9% 81 29.6% 463 1827.7 3486.3
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 10,335 35.6% 1,964 19.0% 25 1086.1 7821.8
SUBJECT WORD 33 0.1% 14 42.4% 18 751.8 1666.3
SUBJECT 743 2.6% 276 37.1% 162 3043.9 13323.8
MAJOR SUBJECT 35 0.1% 6 17.1% 925 3514.8 6442.3
EXACT SUBJECT 604 2.1% 154 25.5% 506 4112.9 6255.8
MAJOR XS 103 0.4% 28 27.2% 305 1411.4 3551.5
EXPLODE XS 239 0.8% 31 13.0% 348 18247.9 37806.6
EXPLODE MAJOR 290 1.0% 27 9.3% 30,691 39539.1 37946.9
TREE NUMBER 13 0.0% 6 46.2% 7 1408.0 3272.6
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1,351 4.7% 192 14.2% 14 218.6 793.8
LANGUAGE 608 2.1% 30 4.9% 73 806.7 0.0
PUB TYPE 388 1.3% 32 8.2% 28 350.5 1862.2
Other indexes 355 1.2% 48 13.5% 1 22.8 128.2
By number of indexes:
Multiple 8,559 32.9% 1,899 22.2% 10 2321.3 12870.2
Single 17,480 67.1% 3,576 20.5% 28 1098.6 6989.2
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 1.5% 1 16.7% 13 11.2 5.0
JOURNAL 88 22.7% 21 23.9% 2 6.9 14.8
EXACT JOURNAL 20 5.2% 6 30.0% 1 1.6 1.9
SUBJECT 214 55.2% 32 15.0% 3 28.1 208.4
EXACT SUBJECT 60 15.5% 11 18.3% 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 388 100% 71 18.3% 2 18.0 158.3
LIMITS:
Number of times limits (bit strings) used: 1,433
Use by bit string (percentage):
Current year minus 5 15.8%
Current year minus 4 0.0%
Current year minus 3 1.9%
Current year minus 2 0.6%
Current year minus 1 0.3%
Current year 1.0%
English Language 43.9%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.1%
XS Adult 0.2%
XS Aged 0.1%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.6%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 6.7%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.1%
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 24.0%
PT Journal Article 0.1%
SUBSET AIM 2.2%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.5%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 10,154
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.4%
Percentage of ORs 5.4%
Percentage of AND NOTs 1.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 63.4%
LONG 0.9%
MEDLINE 1.0%
FIELDS 2.8%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.8%
Ten most frequent errors:
1. NS command - no next screen 40.9%
2. First word of command is invalid 25.6%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 2.2%
6. Add-on search with invalid index name 2.1%
7. Search term missing from search command 1.5%
8. Valid command at an inappropriate time 1.4%
9. Command containing escape or arrow key 1.4%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 13.7%
2. BOOKS DATABASE 10.1%
3. MEDLINE BACKFILES 9.4%
4. FIND 9.2%
5. Unrecognized term 6.1%
6. COMMANDS 4.7%
7. MAIL 4.2%
8. DISPLAY 4.2%
9. DATABASES 4.0%
10. INDEXES 4.0%
11. All others 33.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 17.6%
2. First word of command is invalid 13.7%
3. FIND command with invalid index name 7.9%
4. DISPLAY command-first of >1 screen 6.1%
5. NS command - no next screen 4.9%
6. DISPLAY command - middle of >1 screen 4.7%
7. FIND command retrieves >1 book 4.2%
8. FIND command with zero results 3.0%
9. DISPLAY command - last of >1 screen 2.5%
10. DISPLAY command-complete in one screen 2.3%
11. All others 30.2%
Ten most frequent SHOW requests:
1. HISTORY 73.5%
2. SEARCH 10.7%
3. MAIL STATUS 7.0%
4. SETTINGS 4.7%
5. MEDLINE GLOSSARY 1.4%
6. DATABASES 0.9%
7. X016 0.5%
8. MAIL SETTINGS 0.5%
9. DISPLAY 0.5%
10. UPDATE 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)