MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 08/12/00 through 08/18/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 117 479 596
Davis 36 709 196 941
Irvine 0 479 0 479
Los Angeles 0 425 328 753
Riverside 0 27 25 52
San Diego 170 699 82 951
San Francisco 115 0 1,756 1,871
Santa Barbara 0 14 47 61
Santa Cruz 77 14 51 142
Stanford 218
Other (including DLA) 0 0 1,846 1,846
_______________ _________ _________ _________
Total: 398 2,484 4,810 7,910
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,734 18,435 202,228
MED90 database 1,028 2,356 14,976
MED85 database 537 1,005 5,807
MED80 database 311 573 3,647
MED75 database 171 335 1,658
MED66 database 129 281 2,253
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 115 242 1,926
2-4 a.m. 37 89 862
4-6 a.m. 52 87 526
6-8 a.m. 160 421 2,875
8-10 a.m. 849 2,422 18,252
10-12 a.m. 1,519 4,624 48,912
12-2 p.m. 1,261 3,690 35,758
2-4 p.m. 1,685 4,637 49,777
4-6 p.m. 1,282 3,732 38,150
6-8 p.m. 581 1,671 18,123
8-10 p.m. 226 870 11,247
10-12 p.m. 143 500 4,161
__________ __________ __________ _________________
Total: 7,910 22,985 230,569
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 20:37 13:56 15:26 13:50
Median 11:48 8:21 12:20 8:35
Total:
Average 20:37 13:56 15:26 13:50
Median 11:48 8:21 12:20 8:35
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.4
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 7,910 100%
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 937.6
Retrievals per search - median 10.0
Retrievals per search - standard deviation 9885.2
Percent of searches completed with 0 results 20.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed 64.7%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 17,282 24.3%
DISPLAY (excluding automatic displays) 26,346 37.1%
BROWSE 359 0.5%
SELECT 220 0.3%
HELP 431 0.6%
EXPLAIN 380 0.5%
SAVE 5,113 7.2%
SET/RESET 3,610 5.1%
SHOW 259 0.4%
ADD-ON (AND, OR, AND NOT) 4,838 6.8%
LOGON or LOGOFF 9,012 12.7%
COMMENT 0 0.0%
OTHER 3,176 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 7,492 30.7% 1,415 18.9% 15 111.1 668.1
TITLE WORD 2,708 11.1% 856 31.6% 8 324.8 1487.7
EXACT TITLE 141 0.6% 81 57.4% 1 6.3 26.0
JOURNAL 1,047 4.3% 319 30.5% 120 2358.6 7291.6
EXACT JOURNAL 278 1.1% 88 31.7% 277 1456.5 2759.9
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 9,111 37.3% 1,747 19.2% 28 1853.0 16529.2
SUBJECT WORD 18 0.1% 9 50.0% 185 3273.4 4749.0
SUBJECT 698 2.9% 227 32.5% 161 3302.6 10090.5
MAJOR SUBJECT 75 0.3% 12 16.0% 211 1942.0 4187.3
EXACT SUBJECT 340 1.4% 71 20.9% 105 2431.5 8259.9
MAJOR XS 92 0.4% 17 18.5% 342 779.8 1028.0
EXPLODE XS 142 0.6% 10 7.0% 608 10634.9 21767.2
EXPLODE MAJOR 29 0.1% 6 20.7% 38 771.2 1875.7
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 982 4.0% 147 15.0% 11 244.3 2344.4
LANGUAGE 584 2.4% 29 5.0% 73 654.5 0.0
PUB TYPE 356 1.5% 27 7.6% 38 622.2 3352.3
Other indexes 304 1.2% 56 18.4% 1 46.7 219.6
By number of indexes:
Multiple 7,303 33.1% 1,633 22.4% 12 469.3 4421.3
Single 14,776 66.9% 2,885 19.5% 31 1575.2 13329.8
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 7.0% 4 16.0% 1 5.5 8.3
JOURNAL 73 20.5% 9 12.3% 2 9.8 26.8
EXACT JOURNAL 7 2.0% 1 14.3% 1 1.3 0.5
SUBJECT 216 60.7% 45 20.8% 2 7.3 17.3
EXACT SUBJECT 35 9.8% 1 2.9% 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 356 100% 60 16.9% 1 6.9 18.3
LIMITS:
Number of times limits (bit strings) used: 1,362
Use by bit string (percentage):
Current year minus 5 14.2%
Current year minus 4 0.0%
Current year minus 3 1.7%
Current year minus 2 0.2%
Current year minus 1 0.4%
Current year 0.3%
English Language 45.2%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.7%
XS Adolescence 0.7%
XS Adult 0.1%
XS Aged 0.1%
XS Animal 0.3%
XS Case Report 0.0%
XS Child 0.0%
XS Comparative Studies 0.4%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 7.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
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 24.0%
PT Journal Article 0.1%
SUBSET AIM 3.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.5%
SUBSET Dental journals 0.1%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,366
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.3%
Percentage of ORs 3.4%
Percentage of AND NOTs 1.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
BRIEF 62.8%
LONG 1.0%
MEDLINE 0.7%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.6%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.4%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 40.4%
2. First word of command is invalid 25.2%
3. FIND command with invalid index name 5.9%
4. DISPLAY command contains invalid word 4.1%
5. Valid command at an inappropriate time 2.3%
6. Add-on search with invalid index name 1.7%
7. PS command - no previous screen 1.7%
8. Search term missing from search command 1.6%
9. DISPLAY command - no FIND results 1.5%
10. DISPLAY command-record numbers too large 1.4%
11. All others 14.0%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.7%
2. FIND 9.2%
3. LOCATE (article dbs w/o monographs) 8.2%
4. ADD-ON SEARCH 7.6%
5. MEDLINE BACKFILES 6.6%
6. Unrecognized term 5.0%
7. 3304 5.0%
8. COMMANDS 4.2%
9. DATABASES 3.7%
10. INDEXES 3.7%
11. All others 28.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.6%
2. First word of command is invalid 15.7%
3. FIND command with invalid index name 8.3%
4. FIND command retrieves >1 book 5.3%
5. DISPLAY command - middle of >1 screen 4.8%
6. DISPLAY command-first of >1 screen 4.7%
7. DISPLAY command-complete in one screen 3.3%
8. DISPLAY command - last of >1 screen 2.8%
9. Add-on without index name 2.3%
10. NS command - no next screen 2.2%
11. All others 33.2%
Ten most frequent SHOW requests:
1. HISTORY 74.1%
2. SEARCH 9.5%
3. MAIL STATUS 6.0%
4. SETTINGS 3.0%
5. MEDLINE GLOSSARY 1.5%
6. MEDLINE NEWS 1.5%
7. 0605 1.0%
8. MEDLINE LOADING STATISTICS 1.0%
9. DLA NEWS 0.5%
10. SUBSETS 0.5%
11. All others 1.5%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)