MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/02/00 through 12/08/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 185 699 884
Davis 25 677 158 860
Irvine 0 599 0 599
Los Angeles 0 264 150 414
Riverside 0 12 62 74
San Diego 125 588 74 787
San Francisco 140 0 1,377 1,517
Santa Barbara 0 34 29 63
Santa Cruz 8 3 75 86
Stanford 229
Other (including DLA) 0 0 1,997 1,997
_______________ _________ _________ _________
Total: 298 2,362 4,621 7,510
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,387 17,051 180,678
MED90 database 916 1,845 11,244
MED85 database 507 955 5,143
MED80 database 333 579 3,393
MED75 database 216 399 2,376
MED66 database 151 333 1,750
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 93 277 2,664
2-4 a.m. 39 103 800
4-6 a.m. 18 55 457
6-8 a.m. 145 453 4,250
8-10 a.m. 888 2,080 18,280
10-12 a.m. 1,436 4,047 41,449
12-2 p.m. 1,278 3,619 31,190
2-4 p.m. 1,512 4,633 42,400
4-6 p.m. 1,119 2,990 33,156
6-8 p.m. 533 1,674 17,157
8-10 p.m. 299 821 7,276
10-12 p.m. 150 410 5,505
__________ __________ __________ _________________
Total: 7,510 21,162 204,584
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 14:54 14:20 15:41 14:27
Median 11:25 9:27 12:03 9:50
Total:
Average 14:54 14:20 15:41 14:27
Median 11:25 9:27 12:03 9:50
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.7 2.0
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 7,510 100%
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 718.8
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7343.1
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.4%
Percent of long searches completed 56.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,583 26.3%
DISPLAY (excluding automatic displays) 22,624 35.8%
BROWSE 242 0.4%
SELECT 112 0.2%
HELP 494 0.8%
EXPLAIN 439 0.7%
SAVE 4,108 6.5%
SET/RESET 3,535 5.6%
SHOW 162 0.3%
ADD-ON (AND, OR, AND NOT) 3,816 6.0%
LOGON or LOGOFF 8,344 13.2%
COMMENT 0 0.0%
OTHER 2,689 4.3%
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 7,147 31.1% 1,497 20.9% 12 104.8 691.4
TITLE WORD 3,092 13.5% 991 32.0% 9 372.3 2391.4
EXACT TITLE 177 0.8% 82 46.3% 1 11.1 56.6
JOURNAL 887 3.9% 259 29.2% 24 1859.7 6858.1
EXACT JOURNAL 226 1.0% 82 36.3% 648 3138.9 6239.0
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 7,830 34.1% 1,479 18.9% 25 1396.8 12151.4
SUBJECT WORD 48 0.2% 24 50.0% 147 1166.0 2941.4
SUBJECT 599 2.6% 239 39.9% 161 3923.0 10185.5
MAJOR SUBJECT 46 0.2% 14 30.4% 328 2776.0 6150.4
EXACT SUBJECT 383 1.7% 85 22.2% 136 1550.4 4293.2
MAJOR XS 71 0.3% 15 21.1% 351 1129.3 1899.9
EXPLODE XS 180 0.8% 39 21.7% 35 3715.5 21965.7
EXPLODE MAJOR 20 0.1% 1 5.0% 2,434 11218.6 25173.8
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 1,005 4.4% 120 11.9% 11 139.1 729.7
LANGUAGE 531 2.3% 28 5.3% 69 710.2 0.0
PUB TYPE 238 1.0% 38 16.0% 34 298.9 1689.5
Other indexes 347 1.5% 55 15.9% 1 19.8 82.2
By number of indexes:
Multiple 6,319 31.1% 1,405 22.2% 10 313.7 5994.1
Single 14,023 68.9% 2,967 21.2% 26 1227.1 9293.4
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 19 8.0% 1 5.3% 9 33.0 74.1
JOURNAL 52 21.8% 7 13.5% 2 3.5 3.8
EXACT JOURNAL 10 4.2% 1 10.0% 1 1.3 0.7
SUBJECT 141 59.2% 31 22.0% 3 27.4 201.1
EXACT SUBJECT 16 6.7% 2 12.5% 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 238 100% 42 17.6% 2 19.3 152.4
LIMITS:
Number of times limits (bit strings) used: 1,357
Use by bit string (percentage):
Current year minus 5 23.4%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.4%
Current year minus 1 0.3%
Current year 0.1%
English Language 39.9%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.6%
XS Adolescence 0.4%
XS Adult 0.0%
XS Aged 0.3%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.5%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.3%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.1%
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 22.5%
PT Journal Article 0.1%
SUBSET AIM 2.0%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.6%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,219
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 96.1%
Percentage of ORs 3.0%
Percentage of AND NOTs 0.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
BRIEF 65.2%
LONG 1.0%
MEDLINE 1.0%
FIELDS 3.2%
PERIODICALS 0.0%
BROWSE REVIEW 0.7%
BROWSE LONG 0.3%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.7%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.5%
Ten most frequent errors:
1. NS command - no next screen 42.7%
2. First word of command is invalid 24.6%
3. FIND command with invalid index name 6.6%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 2.2%
6. Search term missing from search command 1.9%
7. Valid command at an inappropriate time 1.8%
8. Add-on search with invalid index name 1.6%
9. DISPLAY command-record numbers too large 1.2%
10. NS of SHOW/EXP command-no next screen 0.8%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 15.9%
2. BOOKS DATABASE 14.8%
3. FIND 13.2%
4. MEDLINE BACKFILES 8.0%
5. Unrecognized term 6.4%
6. COMMANDS 5.9%
7. INDEXES 4.1%
8. DATABASES 3.6%
9. DISPLAY 3.0%
10. ADD-ON SEARCH 2.5%
11. All others 29.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.0%
2. First word of command is invalid 13.8%
3. FIND command with invalid index name 9.3%
4. DISPLAY command-first of >1 screen 5.4%
5. DISPLAY command - middle of >1 screen 4.8%
6. DISPLAY command - last of >1 screen 4.3%
7. FIND command retrieves >1 book 4.0%
8. NS command - no next screen 3.2%
9. DISPLAY command-complete in one screen 2.9%
10. FIND command with zero results 2.8%
11. All others 22.6%
Ten most frequent SHOW requests:
1. HISTORY 76.2%
2. SEARCH 17.0%
3. MAIL STATUS 2.0%
4. SETTINGS 1.4%
5. MEDLINE GLOSSARY 1.4%
6. MEDLINE NEWS 1.4%
7. UPDATE 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)