MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/10/01 through 02/16/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 174 675 849
Davis 45 727 108 880
Irvine 0 641 0 641
Los Angeles 0 169 227 396
Riverside 0 13 52 65
San Diego 95 577 25 697
San Francisco 88 0 1,524 1,612
Santa Barbara 0 21 60 81
Santa Cruz 15 4 64 83
Stanford 301
Other (including DLA) 0 0 2,001 2,001
_______________ _________ _________ _________
Total: 243 2,326 4,736 7,606
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,312 16,881 177,913
MED90 database 983 2,073 12,008
MED85 database 542 1,048 4,941
MED80 database 348 625 2,753
MED75 database 243 453 2,001
MED66 database 178 385 1,896
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 49 212 3,193
2-4 a.m. 36 90 775
4-6 a.m. 88 168 1,240
6-8 a.m. 145 408 2,778
8-10 a.m. 729 1,918 16,058
10-12 a.m. 1,510 4,325 34,554
12-2 p.m. 1,382 3,900 29,037
2-4 p.m. 1,555 4,457 48,777
4-6 p.m. 1,233 3,306 36,023
6-8 p.m. 404 1,257 13,153
8-10 p.m. 300 946 9,687
10-12 p.m. 175 478 6,237
__________ __________ __________ _________________
Total: 7,606 21,465 201,512
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 13:31 12:58 25:40 13:33
Median 9:25 8:16 12:24 8:38
Total:
Average 13:31 12:58 25:40 13:33
Median 9:25 8:16 12:24 8:38
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.6
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 7,606 100%
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 2.8
Retrievals per search - average 746.4
Retrievals per search - median 8.0
Retrievals per search - standard deviation 5889.3
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.4%
Percent of long searches completed 70.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,257 25.7%
DISPLAY (excluding automatic displays) 21,980 34.7%
BROWSE 359 0.6%
SELECT 264 0.4%
HELP 385 0.6%
EXPLAIN 364 0.6%
SAVE 4,560 7.2%
SET/RESET 3,807 6.0%
SHOW 201 0.3%
ADD-ON (AND, OR, AND NOT) 4,185 6.6%
LOGON or LOGOFF 8,113 12.8%
COMMENT 0 0.0%
OTHER 2,859 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 6,803 29.8% 1,404 20.6% 10 91.2 525.8
TITLE WORD 2,575 11.3% 844 32.8% 7 359.5 3473.6
EXACT TITLE 379 1.7% 168 44.3% 1 6.6 29.0
JOURNAL 1,349 5.9% 375 27.8% 58 1838.7 5764.8
EXACT JOURNAL 291 1.3% 84 28.9% 336 1646.9 3625.2
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 8,135 35.6% 1,587 19.5% 30 1462.4 8940.9
SUBJECT WORD 34 0.1% 21 61.8% 92 4097.5 12843.3
SUBJECT 533 2.3% 188 35.3% 176 3347.1 11499.9
MAJOR SUBJECT 87 0.4% 16 18.4% 251 5607.8 14508.7
EXACT SUBJECT 353 1.5% 103 29.2% 151 1851.6 7395.6
MAJOR XS 39 0.2% 3 7.7% 671 2373.8 3206.8
EXPLODE XS 37 0.2% 4 10.8% 320 2273.9 4373.5
EXPLODE MAJOR 16 0.1% 1 6.3% 503 22985.6 45375.0
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 976 4.3% 195 20.0% 8 335.2 2631.4
LANGUAGE 548 2.4% 14 2.6% 78 1070.6 0.0
PUB TYPE 357 1.6% 21 5.9% 29 1165.4 13753.7
Other indexes 330 1.4% 28 8.5% 1 15.4 73.6
By number of indexes:
Multiple 6,604 32.4% 1,469 22.2% 10 573.6 5978.1
Single 13,791 67.6% 2,944 21.3% 26 1189.7 7140.1
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 18 5.0% 3 16.7% 1 3.6 4.2
JOURNAL 115 32.2% 24 20.9% 1 9.5 30.3
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 205 57.4% 37 18.0% 3 84.9 475.3
EXACT SUBJECT 19 5.3% 3 15.8% 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 357 100% 67 18.8% 2 52.4 363.7
LIMITS:
Number of times limits (bit strings) used: 1,333
Use by bit string (percentage):
Current year minus 5 16.4%
Current year minus 4 0.0%
Current year minus 3 1.3%
Current year minus 2 0.3%
Current year minus 1 0.2%
Current year 0.3%
English Language 43.9%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.2%
XS Adolescence 0.0%
XS Adult 0.5%
XS Aged 0.1%
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 0.1%
XS Human 9.2%
XS Infant 0.0%
XS Infant, Newborn 0.4%
XS Male 0.1%
XS Mice 0.2%
XS Middle Age 1.2%
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 22.1%
PT Journal Article 0.3%
SUBSET AIM 2.6%
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: 7,709
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.1%
Percentage of ORs 3.2%
Percentage of AND NOTs 1.6%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
BRIEF 63.3%
LONG 0.9%
MEDLINE 0.7%
FIELDS 3.3%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.9%
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 40.8%
2. First word of command is invalid 25.8%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 3.5%
5. PS command - no previous screen 1.9%
6. Search term missing from search command 1.9%
7. Add-on search with invalid index name 1.8%
8. Valid command at an inappropriate time 1.6%
9. DISPLAY command - no FIND results 1.5%
10. Command containing escape or arrow key 1.1%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 17.3%
2. FIND 10.7%
3. LOCATE (article dbs w/o monographs) 8.5%
4. MEDLINE BACKFILES 6.0%
5. INDEXES 5.5%
6. COMMANDS 4.9%
7. ADD-ON SEARCH 4.1%
8. Unrecognized term 3.8%
9. MAIL 3.6%
10. DISPLAY 3.6%
11. All others 30.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.4%
2. First word of command is invalid 13.0%
3. FIND command with invalid index name 7.1%
4. DISPLAY command-first of >1 screen 6.7%
5. DISPLAY command - middle of >1 screen 5.7%
6. FIND command retrieves >1 book 4.9%
7. DISPLAY command - last of >1 screen 3.7%
8. NS of SHOW/EXP command-no next screen 3.1%
9. NS command - no next screen 2.8%
10. DISPLAY command-complete in one screen 2.5%
11. All others 31.9%
Ten most frequent SHOW requests:
1. HISTORY 57.1%
2. SEARCH 29.8%
3. MEDLINE NEWS 4.3%
4. MAIL STATUS 3.7%
5. SETTINGS 1.9%
6. MEDLINE GLOSSARY 1.2%
7. 0627 0.6%
8. MAIL SETTINGS 0.6%
9. MEDLINE LOADING STATISTICS 0.6%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)