MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 01/06/01 through 01/12/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 98 538 636
Davis 53 814 176 1,043
Irvine 0 535 0 535
Los Angeles 0 157 197 354
Riverside 0 17 82 99
San Diego 130 579 39 748
San Francisco 121 0 1,621 1,742
Santa Barbara 0 3 111 114
Santa Cruz 7 1 47 55
Stanford 266
Other (including DLA) 0 0 2,099 2,099
_______________ _________ _________ _________
Total: 311 2,204 4,910 7,691
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,643 17,463 196,877
MED90 database 878 1,908 13,908
MED85 database 469 882 6,573
MED80 database 325 556 3,261
MED75 database 227 436 2,339
MED66 database 149 332 2,284
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 68 179 3,734
2-4 a.m. 19 59 2,461
4-6 a.m. 79 104 1,184
6-8 a.m. 195 502 3,946
8-10 a.m. 835 2,321 23,403
10-12 a.m. 1,482 4,076 38,021
12-2 p.m. 1,357 3,680 37,675
2-4 p.m. 1,609 4,759 42,954
4-6 p.m. 1,117 3,335 37,856
6-8 p.m. 434 1,188 13,308
8-10 p.m. 271 757 11,328
10-12 p.m. 225 617 9,372
__________ __________ __________ _________________
Total: 7,691 21,577 225,242
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 16:27 13:27 17:28 13:22
Median 13:12 7:29 11:53 7:54
Total:
Average 16:27 13:27 17:28 13:22
Median 13:12 7:29 11:53 7:54
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 7,691 100%
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 1001.5
Retrievals per search - median 10.0
Retrievals per search - standard deviation 9196.2
Percent of searches completed with 0 results 20.4%
Percent of searches entered that are long 0.2%
Percent of long searches completed 61.5%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,380 24.7%
DISPLAY (excluding automatic displays) 22,959 34.6%
BROWSE 280 0.4%
SELECT 163 0.2%
HELP 465 0.7%
EXPLAIN 416 0.6%
SAVE 5,647 8.5%
SET/RESET 3,546 5.3%
SHOW 236 0.4%
ADD-ON (AND, OR, AND NOT) 4,248 6.4%
LOGON or LOGOFF 8,982 13.5%
COMMENT 0 0.0%
OTHER 3,024 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 6,827 30.0% 1,407 20.6% 13 116.7 679.2
TITLE WORD 2,726 12.0% 839 30.8% 8 616.4 3610.4
EXACT TITLE 224 1.0% 87 38.8% 1 60.3 397.4
JOURNAL 820 3.6% 254 31.0% 159 1470.5 3940.8
EXACT JOURNAL 241 1.1% 64 26.6% 373 2444.5 4642.8
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 8,413 36.9% 1,531 18.2% 35 1786.2 12918.0
SUBJECT WORD 12 0.1% 9 75.0% 1,262 1241.0 1179.6
SUBJECT 569 2.5% 210 36.9% 298 5644.0 20347.9
MAJOR SUBJECT 50 0.2% 14 28.0% 555 2337.8 5529.7
EXACT SUBJECT 289 1.3% 94 32.5% 160 3608.9 17646.7
MAJOR XS 35 0.2% 6 17.1% 415 1072.5 1399.8
EXPLODE XS 152 0.7% 16 10.5% 512 18231.3 49302.9
EXPLODE MAJOR 45 0.2% 1 2.2% 534 11860.9 31870.2
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 978 4.3% 187 19.1% 24 203.6 834.0
LANGUAGE 509 2.2% 20 3.9% 73 717.4 0.0
PUB TYPE 279 1.2% 14 5.0% 36 1179.1 8086.7
Other indexes 533 2.3% 69 12.9% 1 448.6 5197.3
By number of indexes:
Multiple 6,439 31.3% 1,391 21.6% 13 866.6 9417.2
Single 14,150 68.7% 2,834 20.0% 29 1512.3 10984.6
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 20 7.2% 2 10.0% 10 68.8 132.1
JOURNAL 50 17.9% 9 18.0% 2 9.1 15.2
EXACT JOURNAL 8 2.9% 2 25.0% 1 1.2 0.4
SUBJECT 190 68.1% 40 21.1% 2 5.6 8.9
EXACT SUBJECT 11 3.9% 3 27.3% 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 279 100% 56 20.1% 2 11.0 41.6
LIMITS:
Number of times limits (bit strings) used: 1,438
Use by bit string (percentage):
Current year minus 5 21.4%
Current year minus 4 0.0%
Current year minus 3 1.0%
Current year minus 2 0.6%
Current year minus 1 0.4%
Current year 0.2%
English Language 37.5%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.6%
XS Adolescence 0.1%
XS Adult 0.2%
XS Aged 0.6%
XS Animal 0.1%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.2%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 8.4%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.1%
XS Middle Age 1.7%
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 0.3%
SUBSET AIM 2.5%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.3%
SUBSET Dental journals 0.1%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,456
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.3%
Percentage of ORs 4.7%
Percentage of AND NOTs 1.0%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
BRIEF 63.4%
LONG 1.0%
MEDLINE 1.3%
FIELDS 3.9%
PERIODICALS 0.0%
BROWSE REVIEW 0.8%
BROWSE LONG 0.5%
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 39.6%
2. First word of command is invalid 24.1%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 4.2%
5. DISPLAY command - no FIND results 2.4%
6. Add-on search with invalid index name 2.1%
7. PS command - no previous screen 2.0%
8. Search term missing from search command 1.8%
9. Valid command at an inappropriate time 1.6%
10. Command containing escape or arrow key 1.1%
11. All others 14.2%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 16.1%
2. MEDLINE BACKFILES 13.9%
3. FIND 9.1%
4. Unrecognized term 5.8%
5. COMMANDS 5.3%
6. LOCATE (article dbs w/o monographs) 5.0%
7. DATABASES 3.1%
8. INDEXES 2.9%
9. ADD-ON SEARCH 2.6%
10. DISPLAY 2.4%
11. All others 28.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 27.7%
2. First word of command is invalid 12.4%
3. FIND command with invalid index name 7.9%
4. FIND command retrieves >1 book 5.2%
5. DISPLAY command - middle of >1 screen 4.9%
6. DISPLAY command-first of >1 screen 3.2%
7. DISPLAY command - last of >1 screen 2.7%
8. NS command - no next screen 2.6%
9. DISPLAY command-complete in one screen 2.5%
10. NS of SHOW/EXP command-no next screen 2.5%
11. All others 33.7%
Ten most frequent SHOW requests:
1. HISTORY 74.5%
2. SEARCH 10.7%
3. MAIL STATUS 7.1%
4. MEDLINE GLOSSARY 2.6%
5. MAIL SETTINGS 2.0%
6. SETTINGS 1.5%
7. UCSF PASSWORDS 0.5%
8. DISPLAY 0.5%
9. MEDLINE NEWS 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)