MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/03/01 through 02/09/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 151 831 982
Davis 42 729 86 857
Irvine 0 369 0 369
Los Angeles 0 165 176 341
Riverside 0 20 31 51
San Diego 125 662 27 814
San Francisco 100 0 1,499 1,599
Santa Barbara 0 20 62 82
Santa Cruz 105 6 70 181
Stanford 231
Other (including DLA) 0 0 2,031 2,031
_______________ _________ _________ _________
Total: 372 2,122 4,813 7,538
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,552 17,639 194,285
MED90 database 869 1,932 10,662
MED85 database 457 907 4,692
MED80 database 289 548 2,410
MED75 database 208 406 1,591
MED66 database 163 319 2,188
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 63 182 1,674
2-4 a.m. 56 151 2,102
4-6 a.m. 77 130 1,199
6-8 a.m. 208 488 4,391
8-10 a.m. 825 2,123 16,066
10-12 a.m. 1,436 3,859 38,887
12-2 p.m. 1,161 3,299 35,951
2-4 p.m. 1,530 4,709 42,122
4-6 p.m. 1,217 3,465 32,770
6-8 p.m. 449 1,627 17,787
8-10 p.m. 337 1,091 14,281
10-12 p.m. 179 627 8,598
__________ __________ __________ _________________
Total: 7,538 21,751 215,828
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 21:04 13:33 15:23 13:57
Median 7:50 7:39 12:12 7:55
Total:
Average 21:04 13:33 15:23 13:57
Median 7:50 7:39 12:12 7:55
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.1
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 7,538 100%
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 809.5
Retrievals per search - median 8.0
Retrievals per search - standard deviation 5990.1
Percent of searches completed with 0 results 20.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed 60.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,389 25.8%
DISPLAY (excluding automatic displays) 22,628 35.6%
BROWSE 269 0.4%
SELECT 121 0.2%
HELP 447 0.7%
EXPLAIN 371 0.6%
SAVE 3,760 5.9%
SET/RESET 3,517 5.5%
SHOW 169 0.3%
ADD-ON (AND, OR, AND NOT) 4,363 6.9%
LOGON or LOGOFF 8,517 13.4%
COMMENT 0 0.0%
OTHER 3,068 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 6,660 28.7% 1,355 20.3% 11 81.6 396.0
TITLE WORD 2,640 11.4% 817 30.9% 6 558.3 5979.2
EXACT TITLE 247 1.1% 126 51.0% 1 55.1 325.0
JOURNAL 1,109 4.8% 320 28.9% 84 2104.8 7269.5
EXACT JOURNAL 473 2.0% 121 25.6% 742 2860.5 5323.8
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 8,259 35.6% 1,541 18.7% 29 1323.0 9100.3
SUBJECT WORD 9 0.0% 3 33.3% 9 23.0 35.6
SUBJECT 629 2.7% 173 27.5% 1,192 6071.5 8981.6
MAJOR SUBJECT 97 0.4% 22 22.7% 94 2561.0 8774.3
EXACT SUBJECT 529 2.3% 106 20.0% 160 956.4 3381.2
MAJOR XS 57 0.2% 12 21.1% 351 1615.8 2861.1
EXPLODE XS 101 0.4% 24 23.8% 91 2104.6 4387.9
EXPLODE MAJOR 9 0.0% 1 11.1% 1,671 1905.6 1773.1
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 972 4.2% 181 18.6% 10 116.2 363.1
LANGUAGE 497 2.1% 26 5.2% 89 547.4 0.0
PUB TYPE 268 1.2% 25 9.3% 46 1112.8 7385.9
Other indexes 555 2.4% 50 9.0% 1 22.7 124.6
By number of indexes:
Multiple 6,842 33.0% 1,423 20.8% 10 528.8 4823.6
Single 13,862 67.0% 2,834 20.4% 29 1329.9 7652.1
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 11 4.1% 2 18.2% 3 10.4 18.9
JOURNAL 76 28.4% 18 23.7% 2 10.4 21.9
EXACT JOURNAL 9 3.4% 1 11.1% 1 1.0 0.0
SUBJECT 162 60.4% 33 20.4% 2 4.4 8.0
EXACT SUBJECT 10 3.7% 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 268 100% 54 20.1% 2 6.0 13.8
LIMITS:
Number of times limits (bit strings) used: 1,313
Use by bit string (percentage):
Current year minus 5 20.0%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.7%
Current year minus 1 0.8%
Current year 0.2%
English Language 39.4%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.2%
XS Adolescence 0.2%
XS Adult 1.4%
XS Aged 0.3%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 2.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.5%
XS Human 8.3%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 1.1%
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 19.9%
PT Journal Article 0.1%
SUBSET AIM 2.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,064
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.6%
Percentage of ORs 4.5%
Percentage of AND NOTs 1.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
BRIEF 61.2%
LONG 1.3%
MEDLINE 1.3%
FIELDS 4.3%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.0%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.2%
Ten most frequent errors:
1. NS command - no next screen 39.4%
2. First word of command is invalid 26.1%
3. FIND command with invalid index name 6.4%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 1.9%
6. Add-on search with invalid index name 1.9%
7. DISPLAY command - no FIND results 1.6%
8. Search term missing from search command 1.5%
9. Valid command at an inappropriate time 1.3%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.6%
2. MEDLINE BACKFILES 10.0%
3. FIND 9.2%
4. LOADING 7.3%
5. LOCATE (article dbs w/o monographs) 7.0%
6. Unrecognized term 4.6%
7. COMMANDS 4.3%
8. ADD-ON SEARCH 3.8%
9. DISPLAY 3.2%
10. DATABASES 2.7%
11. All others 27.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.2%
2. First word of command is invalid 17.2%
3. FIND command with invalid index name 7.6%
4. FIND command retrieves >1 book 5.0%
5. DISPLAY command - middle of >1 screen 4.9%
6. DISPLAY command-first of >1 screen 4.8%
7. DISPLAY command-complete in one screen 2.8%
8. NS command - no next screen 2.7%
9. DISPLAY command contains invalid word 2.1%
10. DISPLAY command - last of >1 screen 2.1%
11. All others 33.4%
Ten most frequent SHOW requests:
1. HISTORY 65.8%
2. SEARCH 21.2%
3. MAIL STATUS 4.1%
4. SETTINGS 2.1%
5. MEDLINE NEWS 2.1%
6. MAIL SETTINGS 1.4%
7. MEDLINE GLOSSARY 1.4%
8. G620 0.7%
9. 2288 0.7%
10. DATABASES 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)