MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/19/00 through 08/25/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 135 584 719
Davis 70 755 148 973
Irvine 0 454 0 454
Los Angeles 0 434 186 620
Riverside 0 28 49 77
San Diego 171 647 109 927
San Francisco 94 0 1,577 1,671
Santa Barbara 0 6 37 43
Santa Cruz 8 6 70 84
Stanford 312
Other (including DLA) 0 0 1,877 1,877
_______________ _________ _________ _________
Total: 343 2,465 4,637 7,757
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,549 18,435 195,503
MED90 database 986 2,226 14,126
MED85 database 542 1,118 6,240
MED80 database 335 663 3,154
MED75 database 209 438 2,448
MED66 database 136 294 1,733
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 84 229 3,385
2-4 a.m. 38 90 1,599
4-6 a.m. 51 117 449
6-8 a.m. 249 549 3,495
8-10 a.m. 819 2,415 20,232
10-12 a.m. 1,448 4,262 40,789
12-2 p.m. 1,334 4,043 39,145
2-4 p.m. 1,626 4,933 44,303
4-6 p.m. 1,205 3,615 35,515
6-8 p.m. 404 1,284 16,655
8-10 p.m. 273 970 10,857
10-12 p.m. 226 667 6,780
__________ __________ __________ _________________
Total: 7,757 23,174 223,204
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 18:13 15:47 16:31 15:32
Median 11:49 10:09 12:19 9:57
Total:
Average 18:13 15:47 16:31 15:32
Median 11:49 10:09 12:19 9:57
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.2
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 7,757 100%
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 761.7
Retrievals per search - median 9.0
Retrievals per search - standard deviation 5551.0
Percent of searches completed with 0 results 20.5%
Percent of searches entered that are long 0.4%
Percent of long searches completed 59.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 17,726 25.7%
DISPLAY (excluding automatic displays) 24,820 35.9%
BROWSE 391 0.6%
SELECT 201 0.3%
HELP 506 0.7%
EXPLAIN 319 0.5%
SAVE 4,844 7.0%
SET/RESET 3,582 5.2%
SHOW 258 0.4%
ADD-ON (AND, OR, AND NOT) 4,534 6.6%
LOGON or LOGOFF 8,765 12.7%
COMMENT 0 0.0%
OTHER 3,101 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 7,332 29.4% 1,408 19.2% 13 108.5 631.5
TITLE WORD 2,732 10.9% 840 30.7% 6 278.1 1509.7
EXACT TITLE 130 0.5% 63 48.5% 1 24.8 141.3
JOURNAL 1,376 5.5% 429 31.2% 317 2183.1 5905.3
EXACT JOURNAL 402 1.6% 110 27.4% 252 1467.7 2801.7
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 9,153 36.7% 1,819 19.9% 26 1038.1 7366.1
SUBJECT WORD 17 0.1% 7 41.2% 20 27.2 26.3
SUBJECT 711 2.8% 235 33.1% 111 2703.9 10422.7
MAJOR SUBJECT 87 0.3% 14 16.1% 97 1992.4 6504.3
EXACT SUBJECT 307 1.2% 61 19.9% 68 1009.3 3212.3
MAJOR XS 83 0.3% 18 21.7% 132 1240.9 2742.6
EXPLODE XS 137 0.5% 26 19.0% 57 7669.4 20832.0
EXPLODE MAJOR 110 0.4% 4 3.6% 30,546 29121.6 22735.4
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 988 4.0% 131 13.3% 9 150.5 799.6
LANGUAGE 580 2.3% 40 6.9% 85 988.5 0.0
PUB TYPE 389 1.6% 22 5.7% 29 284.1 1506.5
Other indexes 410 1.6% 51 12.4% 1 650.5 4526.0
By number of indexes:
Multiple 7,219 32.5% 1,514 21.0% 11 860.9 5883.6
Single 14,984 67.5% 3,087 20.6% 30 1063.4 6550.7
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 25 6.4% 2 8.0% 23 99.7 223.4
JOURNAL 113 29.0% 33 29.2% 2 10.2 42.6
EXACT JOURNAL 7 1.8% 1 14.3% 1 1.0 0.0
SUBJECT 209 53.7% 32 15.3% 2 70.9 448.9
EXACT SUBJECT 35 9.0% 2 5.7% 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 389 100% 70 18.0% 2 49.2 341.4
LIMITS:
Number of times limits (bit strings) used: 1,423
Use by bit string (percentage):
Current year minus 5 13.8%
Current year minus 4 0.0%
Current year minus 3 0.8%
Current year minus 2 0.2%
Current year minus 1 0.2%
Current year 0.2%
English Language 43.2%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.0%
XS Adolescence 0.3%
XS Adult 0.4%
XS Aged 1.3%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.5%
XS Human 7.9%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
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 26.4%
PT Journal Article 0.4%
SUBSET AIM 3.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,286
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.4%
Percentage of ORs 4.7%
Percentage of AND NOTs 1.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
BRIEF 63.6%
LONG 0.7%
MEDLINE 1.1%
FIELDS 3.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.5%
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 39.5%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 6.3%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 2.0%
6. Valid command at an inappropriate time 1.9%
7. Search term missing from search command 1.8%
8. Add-on search with invalid index name 1.6%
9. DISPLAY command - no FIND results 1.2%
10. DISPLAY command-record numbers too large 1.2%
11. All others 14.5%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 12.5%
2. LOCATE (article dbs w/o monographs) 9.7%
3. Unrecognized term 9.7%
4. MEDLINE BACKFILES 9.1%
5. FIND 7.2%
6. INDEXES 6.3%
7. DISPLAY 5.3%
8. ADD-ON SEARCH 5.0%
9. COMMANDS 4.7%
10. DATABASES 3.8%
11. All others 27.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.6%
2. First word of command is invalid 14.2%
3. FIND command with invalid index name 7.8%
4. FIND command retrieves >1 book 6.2%
5. DISPLAY command - middle of >1 screen 5.7%
6. NS command - no next screen 5.0%
7. DISPLAY command-first of >1 screen 5.0%
8. DISPLAY command - last of >1 screen 3.3%
9. NS of SHOW/EXP command-no next screen 2.3%
10. PS command - no previous screen 2.2%
11. All others 26.6%
Ten most frequent SHOW requests:
1. HISTORY 72.7%
2. SEARCH 17.2%
3. MAIL STATUS 3.0%
4. MEDLINE GLOSSARY 2.0%
5. SETTINGS 1.5%
6. MAIL SETTINGS 0.5%
7. DISPLAY 0.5%
8. FIND DISPLAY 0.5%
9. 0876 0.5%
10. 0992 0.5%
11. All others 1.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)