MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/27/01 through 02/02/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 175 725 900
Davis 29 672 131 832
Irvine 0 605 0 605
Los Angeles 0 163 140 303
Riverside 0 16 29 45
San Diego 115 545 77 737
San Francisco 164 0 1,601 1,765
Santa Barbara 0 15 125 140
Santa Cruz 5 2 80 87
Stanford 245
Other (including DLA) 0 0 2,158 2,158
_______________ _________ _________ _________
Total: 313 2,193 5,066 7,817
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,554 17,472 193,113
MED90 database 970 2,352 15,061
MED85 database 526 1,041 5,710
MED80 database 403 823 5,954
MED75 database 207 416 2,223
MED66 database 157 393 3,076
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 62 179 4,529
2-4 a.m. 40 130 2,287
4-6 a.m. 110 269 2,478
6-8 a.m. 201 545 4,644
8-10 a.m. 882 2,219 21,231
10-12 a.m. 1,541 4,481 47,259
12-2 p.m. 1,375 4,151 35,880
2-4 p.m. 1,540 4,593 46,201
4-6 p.m. 1,086 3,090 27,879
6-8 p.m. 468 1,350 18,063
8-10 p.m. 306 902 8,866
10-12 p.m. 206 588 5,820
__________ __________ __________ _________________
Total: 7,817 22,497 225,137
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 17:07 14:07 20:49 13:56
Median 9:46 7:34 13:50 7:42
Total:
Average 17:07 14:07 20:49 13:56
Median 9:46 7:34 13:50 7:42
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.6 3.5
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 7,817 100%
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 702.0
Retrievals per search - median 8.0
Retrievals per search - standard deviation 4819.1
Percent of searches completed with 0 results 22.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed 50.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 17,004 25.4%
DISPLAY (excluding automatic displays) 23,270 34.7%
BROWSE 312 0.5%
SELECT 114 0.2%
HELP 388 0.6%
EXPLAIN 339 0.5%
SAVE 5,268 7.9%
SET/RESET 3,625 5.4%
SHOW 236 0.4%
ADD-ON (AND, OR, AND NOT) 4,565 6.8%
LOGON or LOGOFF 8,843 13.2%
COMMENT 0 0.0%
OTHER 3,053 4.6%
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 6,913 29.0% 1,497 21.7% 14 122.3 706.0
TITLE WORD 2,965 12.4% 1,061 35.8% 9 398.0 2715.2
EXACT TITLE 573 2.4% 285 49.7% 1 6.0 40.9
JOURNAL 1,251 5.2% 336 26.9% 282 2281.5 5325.4
EXACT JOURNAL 363 1.5% 104 28.6% 660 2415.3 4124.5
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 7,832 32.8% 1,536 19.6% 29 1326.2 7632.6
SUBJECT WORD 10 0.0% 7 70.0% 247 426.3 537.9
SUBJECT 681 2.9% 262 38.5% 140 2783.7 7977.0
MAJOR SUBJECT 105 0.4% 20 19.0% 199 3989.1 12134.3
EXACT SUBJECT 430 1.8% 116 27.0% 65 756.3 2493.9
MAJOR XS 61 0.3% 14 22.9% 294 2018.2 2938.8
EXPLODE XS 206 0.9% 43 20.9% 99 3263.2 7659.1
EXPLODE MAJOR 136 0.6% 27 19.9% 239 3518.6 18186.6
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 912 3.8% 151 16.6% 14 141.2 517.3
LANGUAGE 615 2.6% 13 2.1% 65 428.9 0.0
PUB TYPE 310 1.3% 28 9.0% 30 737.2 3549.2
Other indexes 425 1.8% 44 10.4% 1 35.9 347.2
By number of indexes:
Multiple 6,911 32.1% 1,619 23.4% 12 351.2 3350.6
Single 14,599 67.9% 3,236 22.2% 31 1219.2 6328.8
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 5 1.6% 0 0.0% 16 16.2 12.5
JOURNAL 62 20.0% 11 17.7% 2 11.7 28.8
EXACT JOURNAL 8 2.6% 1 12.5% 1 1.4 0.8
SUBJECT 187 60.3% 35 18.7% 3 17.8 105.8
EXACT SUBJECT 48 15.5% 6 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 310 100% 53 17.1% 2 13.4 82.5
LIMITS:
Number of times limits (bit strings) used: 1,509
Use by bit string (percentage):
Current year minus 5 17.0%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.1%
Current year minus 1 0.1%
Current year 0.6%
English Language 44.4%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.1%
XS Abstract 0.4%
XS Adolescence 0.9%
XS Adult 0.6%
XS Aged 0.1%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 2.3%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 8.0%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.1%
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 20.1%
PT Journal Article 0.1%
SUBSET AIM 2.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.7%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,072
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.8%
Percentage of ORs 4.9%
Percentage of AND NOTs 1.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.6%
BRIEF 63.2%
LONG 1.2%
MEDLINE 0.7%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 0.9%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.6%
Ten most frequent errors:
1. NS command - no next screen 38.9%
2. First word of command is invalid 26.6%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 4.2%
5. PS command - no previous screen 2.0%
6. Add-on search with invalid index name 1.7%
7. Search term missing from search command 1.5%
8. Valid command at an inappropriate time 1.3%
9. DISPLAY command - no FIND results 1.1%
10. DISPLAY command-record numbers too large 1.0%
11. All others 15.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 14.7%
2. LOCATE (article dbs w/o monographs) 10.9%
3. FIND 8.6%
4. MEDLINE BACKFILES 8.0%
5. Unrecognized term 5.3%
6. COMMANDS 5.3%
7. INDEXES 4.7%
8. MAIL 3.8%
9. ADD-ON SEARCH 2.9%
10. DATABASES 2.7%
11. All others 25.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.5%
2. First word of command is invalid 17.5%
3. FIND command with invalid index name 8.0%
4. FIND command retrieves >1 book 5.8%
5. DISPLAY command - middle of >1 screen 5.5%
6. DISPLAY command-complete in one screen 4.7%
7. DISPLAY command-first of >1 screen 4.7%
8. Add-on without index name 3.2%
9. NS command - no next screen 2.6%
10. DISPLAY command - last of >1 screen 2.1%
11. All others 33.0%
Ten most frequent SHOW requests:
1. HISTORY 81.6%
2. SEARCH 8.6%
3. MAIL STATUS 3.4%
4. MAIL SETTINGS 1.1%
5. SETTINGS 1.1%
6. UPDATE 1.1%
7. UCSF PASSWORDS 0.6%
8. MEDLINE GLOSSARY 0.6%
9. SYSTEM STATISTICS 0.6%
10. MEDLINE STATISTICS 0.6%
11. All others 0.6%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)