MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 02/17/01 through 02/23/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 196 610 806
Davis 73 499 133 705
Irvine 0 691 0 691
Los Angeles 0 183 190 373
Riverside 0 8 36 44
San Diego 89 464 34 587
San Francisco 97 0 1,442 1,539
Santa Barbara 0 23 43 66
Santa Cruz 14 2 78 94
Stanford 293
Other (including DLA) 0 0 2,605 2,605
_______________ _________ _________ _________
Total: 273 2,066 5,171 7,803
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,170 16,616 187,851
MED90 database 1,030 2,102 12,317
MED85 database 605 1,139 4,959
MED80 database 415 809 3,307
MED75 database 316 610 2,547
MED66 database 267 528 3,435
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 64 290 4,649
2-4 a.m. 42 93 829
4-6 a.m. 44 95 714
6-8 a.m. 128 464 4,098
8-10 a.m. 818 2,345 17,746
10-12 a.m. 1,455 3,891 31,165
12-2 p.m. 1,646 4,121 35,899
2-4 p.m. 1,425 4,352 52,476
4-6 p.m. 1,119 3,195 31,202
6-8 p.m. 546 1,425 14,790
8-10 p.m. 318 924 13,209
10-12 p.m. 198 609 7,639
__________ __________ __________ _________________
Total: 7,803 21,804 214,416
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 15:00 14:21 25:47 14:30
Median 11:33 8:42 13:46 9:10
Total:
Average 15:00 14:21 25:47 14:30
Median 11:33 8:42 13:46 9:10
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 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 7,803 100%
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 728.8
Retrievals per search - median 7.0
Retrievals per search - standard deviation 8054.1
Percent of searches completed with 0 results 23.7%
Percent of searches entered that are long 0.4%
Percent of long searches completed 63.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,632 26.3%
DISPLAY (excluding automatic displays) 21,835 34.5%
BROWSE 256 0.4%
SELECT 127 0.2%
HELP 416 0.7%
EXPLAIN 371 0.6%
SAVE 4,336 6.9%
SET/RESET 4,211 6.7%
SHOW 216 0.3%
ADD-ON (AND, OR, AND NOT) 4,123 6.5%
LOGON or LOGOFF 7,657 12.1%
COMMENT 0 0.0%
OTHER 3,033 4.8%
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 6,543 28.5% 1,449 22.1% 13 132.5 912.3
TITLE WORD 2,837 12.4% 938 33.1% 8 470.8 3384.9
EXACT TITLE 493 2.1% 223 45.2% 1 20.2 97.6
JOURNAL 1,232 5.4% 423 34.3% 218 2084.1 6373.7
EXACT JOURNAL 279 1.2% 77 27.6% 471 2083.7 3758.8
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 8,476 36.9% 2,016 23.8% 27 1296.4 11135.6
SUBJECT WORD 40 0.2% 16 40.0% 275 1734.2 3601.2
SUBJECT 486 2.1% 180 37.0% 218 4640.5 22313.0
MAJOR SUBJECT 43 0.2% 15 34.9% 534 3434.6 6393.6
EXACT SUBJECT 438 1.9% 116 26.5% 91 1482.2 7443.1
MAJOR XS 43 0.2% 3 7.0% 111 706.5 1330.0
EXPLODE XS 100 0.4% 22 22.0% 223 17720.6 65623.9
EXPLODE MAJOR 29 0.1% 6 20.7% 888 2740.3 3716.3
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 843 3.7% 170 20.2% 10 115.6 521.5
LANGUAGE 425 1.9% 23 5.4% 64 530.0 0.0
PUB TYPE 254 1.1% 56 22.0% 33 770.9 6898.0
Other indexes 269 1.2% 28 10.4% 1 12.8 53.9
By number of indexes:
Multiple 6,407 31.0% 1,738 27.1% 11 494.9 10167.7
Single 14,286 69.0% 3,279 22.9% 28 1225.1 9150.1
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 10 3.9% 2 20.0% 34 173.4 283.0
JOURNAL 68 26.8% 15 22.1% 2 7.2 13.0
EXACT JOURNAL 2 0.8% 0 0.0% 1 1.0 0.0
SUBJECT 165 65.0% 21 12.7% 3 25.8 157.8
EXACT SUBJECT 9 3.5% 1 11.1% 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 254 100% 39 15.4% 2 25.5 142.2
LIMITS:
Number of times limits (bit strings) used: 1,196
Use by bit string (percentage):
Current year minus 5 19.1%
Current year minus 4 0.0%
Current year minus 3 0.4%
Current year minus 2 0.3%
Current year minus 1 0.3%
Current year 0.3%
English Language 37.0%
French Language 0.0%
Japanese Language 0.0%
German Language 0.5%
Russian Language 0.0%
XS Abstract 0.9%
XS Adolescence 0.3%
XS Adult 0.1%
XS Aged 0.6%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 1.4%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.4%
XS Human 11.2%
XS Infant 0.0%
XS Infant, Newborn 0.3%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.8%
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 23.1%
PT Journal Article 0.0%
SUBSET AIM 1.5%
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: 7,424
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.2%
Percentage of ORs 3.5%
Percentage of AND NOTs 2.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
BRIEF 63.4%
LONG 1.2%
MEDLINE 0.8%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.4%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 27.0%
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 38.6%
2. First word of command is invalid 26.3%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 3.9%
5. Search term missing from search command 2.0%
6. PS command - no previous screen 2.0%
7. Add-on search with invalid index name 1.9%
8. DISPLAY command - no FIND results 1.6%
9. Valid command at an inappropriate time 1.5%
10. NS of SHOW/EXP command-no next screen 1.1%
11. All others 15.0%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 14.0%
2. BOOKS DATABASE 13.7%
3. Unrecognized term 9.4%
4. FIND 8.9%
5. MEDLINE BACKFILES 7.5%
6. LOADING 4.6%
7. COMMANDS 3.8%
8. INDEXES 3.2%
9. DISPLAY 3.0%
10. ADD-ON SEARCH 2.4%
11. All others 26.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.6%
2. First word of command is invalid 12.6%
3. DISPLAY command-first of >1 screen 8.4%
4. DISPLAY command - middle of >1 screen 8.1%
5. FIND command with invalid index name 7.4%
6. FIND command retrieves >1 book 4.2%
7. DISPLAY command - last of >1 screen 3.7%
8. DISPLAY command-complete in one screen 3.6%
9. NS command - no next screen 3.4%
10. Add-on without index name 2.2%
11. All others 29.4%
Ten most frequent SHOW requests:
1. HISTORY 62.7%
2. SEARCH 13.9%
3. MEDLINE NEWS 5.1%
4. MAIL STATUS 3.8%
5. MEDLINE GLOSSARY 3.2%
6. SETTINGS 1.9%
7. MAIL SETTINGS 1.3%
8. DISPLAY 1.3%
9. 0981 1.3%
10. MEDLINE STATISTICS 1.3%
11. All others 4.4%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)