MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 09/02/00 through 09/08/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 164 653 817
Davis 16 628 111 755
Irvine 0 357 0 357
Los Angeles 0 339 141 480
Riverside 0 109 72 181
San Diego 107 619 71 797
San Francisco 86 0 1,460 1,546
Santa Barbara 0 13 38 51
Santa Cruz 3 3 66 72
Stanford 247
Other (including DLA) 0 0 1,619 1,619
_______________ _________ _________ _________
Total: 212 2,232 4,231 6,922
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,044 15,335 181,815
MED90 database 823 1,769 15,514
MED85 database 457 925 14,681
MED80 database 286 656 7,821
MED75 database 189 415 4,988
MED66 database 123 270 1,765
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 103 178 1,788
2-4 a.m. 34 43 689
4-6 a.m. 24 71 275
6-8 a.m. 134 398 2,869
8-10 a.m. 746 1,999 32,570
10-12 a.m. 1,272 3,624 36,457
12-2 p.m. 1,265 3,278 39,751
2-4 p.m. 1,459 4,345 45,052
4-6 p.m. 1,039 2,908 27,903
6-8 p.m. 421 1,302 20,971
8-10 p.m. 275 827 13,158
10-12 p.m. 150 397 5,101
__________ __________ __________ _________________
Total: 6,922 19,370 226,584
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 15:50 14:55 14:53 14:22
Median 9:17 9:37 10:43 8:57
Total:
Average 15:50 14:55 14:53 14:22
Median 9:17 9:37 10:43 8:57
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 2.1
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 6,922 100%
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 778.8
Retrievals per search - median 10.0
Retrievals per search - standard deviation 6695.5
Percent of searches completed with 0 results 20.4%
Percent of searches entered that are long 0.3%
Percent of long searches completed 45.6%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,643 23.8%
DISPLAY (excluding automatic displays) 22,200 36.1%
BROWSE 388 0.6%
SELECT 238 0.4%
HELP 588 1.0%
EXPLAIN 446 0.7%
SAVE 4,888 7.9%
SET/RESET 3,091 5.0%
SHOW 239 0.4%
ADD-ON (AND, OR, AND NOT) 3,864 6.3%
LOGON or LOGOFF 8,051 13.1%
COMMENT 0 0.0%
OTHER 2,918 4.7%
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 6,003 29.5% 1,164 19.4% 14 146.0 950.9
TITLE WORD 2,068 10.2% 651 31.5% 6 291.7 1887.3
EXACT TITLE 104 0.5% 48 46.2% 1 6.6 22.3
JOURNAL 956 4.7% 274 28.7% 108 1736.4 5420.4
EXACT JOURNAL 219 1.1% 53 24.2% 169 1552.4 3372.8
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 7,970 39.2% 1,554 19.5% 28 1426.3 10657.9
SUBJECT WORD 26 0.1% 11 42.3% 61 1680.4 4356.6
SUBJECT 564 2.8% 205 36.3% 334 2738.9 7074.4
MAJOR SUBJECT 40 0.2% 7 17.5% 251 2319.7 6017.3
EXACT SUBJECT 333 1.6% 43 12.9% 157 2092.2 4676.1
MAJOR XS 20 0.1% 6 30.0% 82 488.9 990.5
EXPLODE XS 83 0.4% 12 14.5% 109 8382.1 23825.7
EXPLODE MAJOR 32 0.2% 5 15.6% 1,704 4129.9 6324.8
TREE NUMBER 1 0.0% 0 0.0% 13,744 13744.0 0.0
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 902 4.4% 113 12.5% 20 513.7 2180.2
LANGUAGE 460 2.3% 14 3.0% 102 692.7 0.0
PUB TYPE 379 1.9% 15 4.0% 58 1661.2 8351.6
Other indexes 261 1.3% 26 10.0% 1 7.8 29.0
By number of indexes:
Multiple 5,864 31.8% 1,246 21.2% 14 407.8 2365.9
Single 12,593 68.2% 2,528 20.1% 28 1303.4 9103.2
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 13 3.4% 1 7.7% 2 10.8 24.7
JOURNAL 39 10.3% 3 7.7% 2 4.3 6.4
EXACT JOURNAL 7 1.8% 2 28.6% 1 1.2 0.4
SUBJECT 308 81.3% 62 20.1% 2 6.2 9.9
EXACT SUBJECT 12 3.2% 2 16.7% 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 379 100% 70 18.5% 2 5.9 10.4
LIMITS:
Number of times limits (bit strings) used: 1,158
Use by bit string (percentage):
Current year minus 5 17.1%
Current year minus 4 0.0%
Current year minus 3 0.9%
Current year minus 2 0.2%
Current year minus 1 0.1%
Current year 0.3%
English Language 44.3%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.9%
XS Adolescence 0.3%
XS Adult 0.2%
XS Aged 0.2%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.2%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 9.8%
XS Infant 0.0%
XS Infant, Newborn 1.6%
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 20.9%
PT Journal Article 0.0%
SUBSET AIM 2.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.4%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,050
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.9%
Percentage of ORs 4.4%
Percentage of AND NOTs 1.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
BRIEF 63.8%
LONG 1.0%
MEDLINE 1.2%
FIELDS 2.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.8%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 9.2%
Ten most frequent errors:
1. NS command - no next screen 38.6%
2. First word of command is invalid 25.4%
3. FIND command with invalid index name 7.1%
4. DISPLAY command contains invalid word 4.0%
5. Add-on search with invalid index name 1.9%
6. Search term missing from search command 1.9%
7. Valid command at an inappropriate time 1.8%
8. PS command - no previous screen 1.7%
9. NS of SHOW/EXP command-no next screen 1.4%
10. Command containing escape or arrow key 1.0%
11. All others 15.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 19.5%
2. LOCATE (article dbs w/o monographs) 15.0%
3. MEDLINE BACKFILES 7.2%
4. FIND 6.3%
5. INDEXES 4.7%
6. ADD-ON SEARCH 4.0%
7. COMMANDS 4.0%
8. DISPLAY 3.6%
9. Unrecognized term 2.9%
10. DATABASES 2.7%
11. All others 28.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.1%
2. First word of command is invalid 11.2%
3. FIND command with invalid index name 9.0%
4. DISPLAY command-first of >1 screen 7.5%
5. FIND command retrieves >1 book 5.4%
6. DISPLAY command - middle of >1 screen 4.8%
7. NS command - no next screen 3.7%
8. DISPLAY command - last of >1 screen 2.7%
9. NS of SHOW/EXP command-no next screen 2.6%
10. PS command - no previous screen 1.8%
11. All others 30.0%
Ten most frequent SHOW requests:
1. HISTORY 58.9%
2. SEARCH 26.7%
3. MAIL STATUS 5.6%
4. SETTINGS 4.4%
5. UPDATE 2.2%
6. MEDLINE STATISTICS 1.1%
7. MAIL SETTINGS 0.6%
8. SYSTEM STATISTICS 0.6%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)