MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/01/00 through 02/29/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 1,375 4,206 5,581
Davis 236 4,101 1,097 5,434
Irvine 0 3,259 0 3,259
Los Angeles 0 2,741 1,262 4,003
Riverside 0 220 404 624
San Diego 903 3,954 364 5,221
San Francisco 857 0 9,834 10,691
Santa Barbara 0 95 231 326
Santa Cruz 215 75 518 808
Stanford 2,332
Other (including DLA) 0 0 12,153 12,153
_______________ _________ _________ _________
Total: 2,211 15,820 30,069 50,432
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 36,060 118,559 1,325,906
MED90 database 6,602 15,344 108,694
MED85 database 3,454 7,322 49,175
MED80 database 2,137 4,200 29,422
MED75 database 1,281 2,604 14,034
MED66 database 898 2,082 17,479
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 493 1,487 18,668
2-4 a.m. 212 619 8,266
4-6 a.m. 207 755 7,314
6-8 a.m. 919 2,814 27,956
8-10 a.m. 5,531 15,796 156,729
10-12 a.m. 9,451 28,246 284,192
12-2 p.m. 9,182 26,774 262,269
2-4 p.m. 10,443 30,700 298,388
4-6 p.m. 7,400 22,053 235,641
6-8 p.m. 3,367 10,441 112,573
8-10 p.m. 2,050 6,650 87,419
10-12 p.m. 1,177 3,776 45,295
__________ __________ __________ _________________
Total: 50,432 150,111 1,544,710
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 16:41 14:10 17:10 13:56
Median 10:49 8:57 11:49 8:51
Total:
Average 16:41 14:10 17:10 13:56
Median 10:49 8:57 11:49 8:51
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.3 4.4
transmission of response
Display - from receipt of command at DLA until 0.2 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 50,432 100%
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 783.0
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7211.8
Percent of searches completed with 0 results 21.0%
Percent of searches entered that are long 0.3%
Percent of long searches completed 55.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 114,262 25.1%
DISPLAY (excluding automatic displays) 160,885 35.3%
BROWSE 2,388 0.5%
SELECT 1,273 0.3%
HELP 4,099 0.9%
EXPLAIN 3,214 0.7%
SAVE 35,966 7.9%
SET/RESET 22,844 5.0%
SHOW 1,733 0.4%
ADD-ON (AND, OR, AND NOT) 27,860 6.1%
LOGON or LOGOFF 57,616 12.6%
COMMENT 2 0.0%
OTHER 23,374 5.1%
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 46,550 29.2% 9,631 20.7% 11 108.8 693.9
TITLE WORD 19,299 12.1% 6,131 31.8% 8 817.5 7083.7
EXACT TITLE 1,142 0.7% 501 43.9% 1 25.5 183.1
JOURNAL 6,786 4.3% 2,153 31.7% 85 1919.0 5972.7
EXACT JOURNAL 2,202 1.4% 721 32.7% 343 1581.5 3593.1
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 57,770 36.2% 10,985 19.0% 28 1207.4 9204.7
SUBJECT WORD 281 0.2% 122 43.4% 60 2840.9 18521.2
SUBJECT 5,149 3.2% 2,050 39.8% 174 4619.3 22785.1
MAJOR SUBJECT 419 0.3% 82 19.6% 119 2869.2 11449.3
EXACT SUBJECT 2,245 1.4% 500 22.3% 95 2171.9 9119.4
MAJOR XS 254 0.2% 45 17.7% 177 1188.9 3669.6
EXPLODE XS 1,012 0.6% 143 14.1% 281 6431.0 19799.4
EXPLODE MAJOR 236 0.1% 21 8.9% 650 17783.1 41274.7
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 6,354 4.0% 1,046 16.5% 13 236.4 1909.6
LANGUAGE 4,242 2.7% 251 5.9% 74 686.4 0.0
PUB TYPE 2,362 1.5% 180 7.6% 39 800.1 4328.8
Other indexes 2,765 1.7% 296 10.7% 1 723.0 7064.3
By number of indexes:
Multiple 45,631 32.2% 9,965 21.8% 11 463.8 5540.6
Single 95,863 67.8% 20,248 21.1% 28 1314.1 9265.5
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 68 2.9% 12 17.6% 3 63.7 226.2
JOURNAL 434 18.4% 70 16.1% 2 11.4 19.5
EXACT JOURNAL 141 6.0% 40 28.4% 1 1.7 1.7
SUBJECT 1,620 68.6% 370 22.8% 2 54.7 485.4
EXACT SUBJECT 99 4.2% 11 11.1% 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 2,362 100% 503 21.3% 2 41.0 400.6
LIMITS:
Number of times limits (bit strings) used: 9,279
Use by bit string (percentage):
Current year minus 5 7.0%
Current year minus 4 0.0%
Current year minus 3 1.3%
Current year minus 2 0.4%
Current year minus 1 0.3%
Current year 0.3%
English Language 47.5%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.1%
XS Adult 0.1%
XS Aged 1.0%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 8.4%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
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 25.4%
PT Journal Article 0.3%
SUBSET AIM 5.9%
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: 52,831
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.6%
Percentage of ORs 3.1%
Percentage of AND NOTs 1.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 63.9%
LONG 1.0%
MEDLINE 1.2%
FIELDS 2.9%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
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 9.4%
Ten most frequent errors:
1. NS command - no next screen 38.3%
2. First word of command is invalid 27.3%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 2.3%
6. Valid command at an inappropriate time 1.8%
7. Add-on search with invalid index name 1.7%
8. Search term missing from search command 1.7%
9. NS of SHOW/EXP command-no next screen 1.4%
10. Command containing escape or arrow key 1.1%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.3%
2. LOCATE (article dbs w/o monographs) 12.6%
3. FIND 9.0%
4. MEDLINE BACKFILES 8.1%
5. Unrecognized term 6.2%
6. COMMANDS 4.8%
7. ADD-ON SEARCH 3.8%
8. DISPLAY 3.5%
9. DATABASES 3.3%
10. INDEXES 3.2%
11. All others 29.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.5%
2. First word of command is invalid 14.7%
3. FIND command with invalid index name 7.1%
4. DISPLAY command-first of >1 screen 6.3%
5. DISPLAY command - middle of >1 screen 5.1%
6. FIND command retrieves >1 book 5.0%
7. NS command - no next screen 2.9%
8. DISPLAY command - last of >1 screen 2.8%
9. FIND command with zero results 2.5%
10. NS of SHOW/EXP command-no next screen 2.1%
11. All others 31.2%
Ten most frequent SHOW requests:
1. HISTORY 64.8%
2. SEARCH 20.6%
3. MAIL STATUS 6.7%
4. MEDLINE GLOSSARY 2.0%
5. SETTINGS 1.9%
6. MEDLINE NEWS 1.2%
7. MEDLINE LOADING STATISTICS 0.4%
8. DISPLAY 0.3%
9. DATABASES 0.3%
10. BROWSE DISPLAY 0.2%
11. All others 1.7%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)