MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 10/20/01 through 10/26/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 53 404 457
Davis 18 499 96 613
Irvine 0 331 0 331
Los Angeles 0 13 42 55
Riverside 0 2 47 49
San Diego 82 386 40 508
San Francisco 77 0 998 1,075
Santa Barbara 0 0 14 14
Santa Cruz 0 4 33 37
Stanford 54
Other (including DLA) 0 0 1,921 1,921
_______________ _________ _________ _________
Total: 177 1,288 3,595 5,114
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 3,592 10,558 120,538
MED90 database 644 1,300 7,038
MED85 database 342 662 4,863
MED80 database 249 472 3,280
MED75 database 158 303 2,362
MED66 database 129 245 2,207
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 69 167 2,018
2-4 a.m. 27 63 394
4-6 a.m. 35 59 346
6-8 a.m. 174 466 6,438
8-10 a.m. 611 1,608 13,334
10-12 a.m. 1,007 2,481 21,953
12-2 p.m. 949 2,599 21,774
2-4 p.m. 963 2,542 27,148
4-6 p.m. 780 2,224 21,812
6-8 p.m. 301 726 17,137
8-10 p.m. 125 358 3,929
10-12 p.m. 73 247 4,005
__________ __________ __________ _________________
Total: 5,114 13,540 140,288
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 19:10 14:52 17:57 14:50
Median 10:36 9:33 12:27 10:02
Total:
Average 19:10 14:52 17:57 14:50
Median 10:36 9:33 12:27 10:02
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.0 6.9
transmission of response
Display - from receipt of command at DLA until 0.1 0.7
transmission of a complete screen
Use of Assist vs Command mode: Number of Percentage of
Sessions Searches
_________ _____________
Assist mode 0 0.0%
Command mode 5,114 100%
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 2.6
Retrievals per search - average 809.2
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7999.0
Percent of searches completed with 0 results 19.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed 65.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 10,066 25.7%
DISPLAY (excluding automatic displays) 13,986 35.7%
BROWSE 297 0.8%
SELECT 69 0.2%
HELP 189 0.5%
EXPLAIN 173 0.4%
SAVE 2,072 5.3%
SET/RESET 2,751 7.0%
SHOW 77 0.2%
ADD-ON (AND, OR, AND NOT) 2,751 7.0%
LOGON or LOGOFF 5,062 12.9%
COMMENT 0 0.0%
OTHER 1,719 4.4%
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 4,536 31.2% 888 19.6% 9 97.8 700.4
TITLE WORD 1,997 13.7% 654 32.7% 6 386.0 2127.7
EXACT TITLE 66 0.5% 28 42.4% 1 111.4 449.2
JOURNAL 768 5.3% 222 28.9% 270 2168.9 7961.5
EXACT JOURNAL 286 2.0% 80 28.0% 448 2439.9 6264.3
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 4,554 31.3% 733 16.1% 33 1755.7 12909.7
SUBJECT WORD 9 0.1% 3 33.3% 35 90.2 142.9
SUBJECT 252 1.7% 75 29.8% 130 2560.8 7003.6
MAJOR SUBJECT 12 0.1% 1 8.3% 1,403 4585.6 6375.2
EXACT SUBJECT 138 0.9% 29 21.0% 100 1383.8 4009.0
MAJOR XS 41 0.3% 4 9.8% 338 2345.5 4302.9
EXPLODE XS 25 0.2% 4 16.0% 21 480.5 1004.7
EXPLODE MAJOR 6 0.0% 0 0.0% 4,246 77238.2 116305
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 1,115 7.7% 140 12.6% 11 116.5 405.0
LANGUAGE 222 1.5% 5 2.3% 58 952.9 0.0
PUB TYPE 296 2.0% 11 3.7% 40 695.5 5269.0
Other indexes 273 1.9% 60 22.0% 1 24.3 108.0
By number of indexes:
Multiple 4,410 34.5% 873 19.8% 9 391.8 6006.2
Single 8,371 65.5% 1,668 19.9% 30 1418.8 10444.2
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 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 58 19.6% 10 17.2% 1 9.2 29.5
EXACT JOURNAL 5 1.7% 1 20.0% 4 3.3 1.5
SUBJECT 215 72.6% 47 21.9% 2 7.3 12.3
EXACT SUBJECT 18 6.1% 1 5.6% 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 296 100% 59 19.9% 2 7.1 16.9
LIMITS:
Number of times limits (bit strings) used: 966
Use by bit string (percentage):
Current year minus 5 38.4%
Current year minus 4 0.0%
Current year minus 3 2.8%
Current year minus 2 0.3%
Current year minus 1 0.5%
Current year 0.2%
English Language 26.8%
French Language 0.0%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.1%
XS Adult 0.0%
XS Aged 0.0%
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 5.3%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 0.8%
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 21.9%
PT Journal Article 0.1%
SUBSET AIM 0.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.8%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 4,999
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 97.3%
Percentage of ORs 2.4%
Percentage of AND NOTs 0.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
BRIEF 61.4%
LONG 1.2%
MEDLINE 0.9%
FIELDS 3.4%
PERIODICALS 0.0%
BROWSE REVIEW 1.4%
BROWSE LONG 0.8%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.2%
Other 27.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 7.6%
Ten most frequent errors:
1. NS command - no next screen 44.3%
2. First word of command is invalid 23.7%
3. FIND command with invalid index name 5.5%
4. DISPLAY command contains invalid word 4.8%
5. PS command - no previous screen 2.3%
6. Add-on search with invalid index name 1.9%
7. Valid command at an inappropriate time 1.5%
8. Search term missing from search command 1.5%
9. DISPLAY command - no FIND results 1.2%
10. NS of SHOW/EXP command-no next screen 0.8%
11. All others 12.6%
Ten most frequent EXPLAIN requests:
1. FIND 16.8%
2. BOOKS DATABASE 15.6%
3. LOCATE (article dbs w/o monographs) 9.8%
4. LOADING 8.1%
5. Unrecognized term 5.8%
6. 1752 4.0%
7. MAIL 3.5%
8. INDEXES 3.5%
9. DISPLAY 2.3%
10. MEDLINE BACKFILES 2.3%
11. All others 29.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.7%
2. First word of command is invalid 16.0%
3. FIND command with invalid index name 7.5%
4. FIND command retrieves >1 book 5.5%
5. DISPLAY command-complete in one screen 4.7%
6. DISPLAY command - last of >1 screen 4.7%
7. DISPLAY command-first of >1 screen 3.6%
8. NS command - no next screen 3.3%
9. DISPLAY command - middle of >1 screen 2.8%
10. 763 2.2%
11. All others 28.3%
Ten most frequent SHOW requests:
1. HISTORY 65.7%
2. SEARCH 8.6%
3. MAIL STATUS 7.1%
4. MEDLINE NEWS 5.7%
5. SETTINGS 4.3%
6. MAIL SETTINGS 1.4%
7. DISPLAY 1.4%
8. MEDLINE GLOSSARY 1.4%
9. LOCAL INFORMATION 1.4%
10. UPDATE 1.4%
11. All others 1.4%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)