MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 12/30/00 through 01/05/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 102 464 566
Davis 34 655 118 807
Irvine 0 323 0 323
Los Angeles 0 121 155 276
Riverside 0 11 28 39
San Diego 74 421 129 624
San Francisco 77 0 1,205 1,282
Santa Barbara 0 2 39 41
Santa Cruz 1 10 67 78
Stanford 274
Other (including DLA) 0 0 1,743 1,743
_______________ _________ _________ _________
Total: 186 1,645 3,948 6,053
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,224 13,676 160,308
MED90 database 759 1,556 14,337
MED85 database 424 815 4,943
MED80 database 299 565 3,520
MED75 database 205 462 2,420
MED66 database 142 320 1,506
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 68 245 6,449
2-4 a.m. 26 67 746
4-6 a.m. 17 65 616
6-8 a.m. 114 347 2,467
8-10 a.m. 642 1,799 16,512
10-12 a.m. 1,190 3,497 40,038
12-2 p.m. 999 2,933 28,786
2-4 p.m. 1,269 3,757 37,533
4-6 p.m. 883 2,392 24,642
6-8 p.m. 398 1,090 12,424
8-10 p.m. 254 649 6,709
10-12 p.m. 193 553 10,112
__________ __________ __________ _________________
Total: 6,053 17,394 187,034
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 17:09 15:21 21:50 15:15
Median 11:25 9:59 13:37 9:48
Total:
Average 17:09 15:21 21:50 15:15
Median 11:25 9:59 13:37 9:48
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.7
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 6,053 100%
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 813.1
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8892.4
Percent of searches completed with 0 results 20.9%
Percent of searches entered that are long 0.4%
Percent of long searches completed 45.3%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 13,152 25.5%
DISPLAY (excluding automatic displays) 18,279 35.4%
BROWSE 307 0.6%
SELECT 164 0.3%
HELP 309 0.6%
EXPLAIN 273 0.5%
SAVE 3,578 6.9%
SET/RESET 3,114 6.0%
SHOW 205 0.4%
ADD-ON (AND, OR, AND NOT) 3,441 6.7%
LOGON or LOGOFF 6,337 12.3%
COMMENT 0 0.0%
OTHER 2,457 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 5,660 30.2% 1,199 21.2% 13 123.3 857.0
TITLE WORD 2,385 12.7% 755 31.7% 8 283.1 1292.3
EXACT TITLE 88 0.5% 45 51.1% 2 76.0 343.4
JOURNAL 803 4.3% 253 31.5% 64 2062.0 7525.4
EXACT JOURNAL 216 1.2% 76 35.2% 538 2249.4 3741.6
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 6,423 34.3% 1,308 20.4% 27 1574.2 13798.2
SUBJECT WORD 15 0.1% 11 73.3% 2,402 2725.8 3080.0
SUBJECT 424 2.3% 133 31.4% 246 7080.1 33080.9
MAJOR SUBJECT 54 0.3% 7 13.0% 240 2794.1 6949.7
EXACT SUBJECT 377 2.0% 56 14.9% 63 787.8 3020.1
MAJOR XS 47 0.3% 5 10.6% 1,186 1929.1 2908.4
EXPLODE XS 127 0.7% 16 12.6% 115 4645.9 13335.4
EXPLODE MAJOR 48 0.3% 4 8.3% 1,746 4117.9 7914.4
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 832 4.4% 129 15.5% 13 118.9 321.0
LANGUAGE 534 2.9% 35 6.6% 87 390.2 0.0
PUB TYPE 303 1.6% 11 3.6% 45 1364.8 11166.9
Other indexes 338 1.8% 44 13.0% 1 39.6 328.2
By number of indexes:
Multiple 5,516 33.3% 1,245 22.6% 13 402.3 5131.5
Single 11,025 66.7% 2,261 20.5% 27 1405.2 11952.2
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 2 0.7% 0 0.0% 8 8.0 7.1
JOURNAL 58 19.1% 11 19.0% 2 7.4 12.0
EXACT JOURNAL 4 1.3% 0 0.0% 1 2.5 3.0
SUBJECT 229 75.6% 52 22.7% 2 41.7 340.3
EXACT SUBJECT 10 3.3% 1 10.0% 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 303 100% 64 21.1% 2 32.5 293.1
LIMITS:
Number of times limits (bit strings) used: 1,421
Use by bit string (percentage):
Current year minus 5 18.6%
Current year minus 4 0.0%
Current year minus 3 0.2%
Current year minus 2 0.1%
Current year minus 1 0.3%
Current year 0.1%
English Language 38.4%
French Language 0.0%
Japanese Language 0.1%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.1%
XS Adolescence 0.0%
XS Adult 0.6%
XS Aged 0.5%
XS Animal 0.3%
XS Case Report 0.0%
XS Child 0.1%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.0%
XS Human 14.4%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.1%
XS Mice 0.0%
XS Middle Age 1.9%
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 21.3%
PT Journal Article 0.2%
SUBSET AIM 2.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.2%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 6,461
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.9%
Percentage of ORs 4.1%
Percentage of AND NOTs 1.9%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 62.6%
LONG 0.6%
MEDLINE 0.9%
FIELDS 3.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 28.4%
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 39.8%
2. First word of command is invalid 25.7%
3. FIND command with invalid index name 6.5%
4. DISPLAY command contains invalid word 3.9%
5. Add-on search with invalid index name 2.2%
6. Search term missing from search command 1.9%
7. DISPLAY command - no FIND results 1.9%
8. Valid command at an inappropriate time 1.5%
9. PS command - no previous screen 1.4%
10. DISPLAY command-record numbers too large 1.0%
11. All others 14.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 11.4%
2. FIND 10.6%
3. MEDLINE BACKFILES 8.4%
4. LOCATE (article dbs w/o monographs) 7.3%
5. Unrecognized term 7.3%
6. INDEXES 4.8%
7. DATABASES 4.0%
8. DISPLAY 4.0%
9. 3304 3.7%
10. COMMANDS 3.7%
11. All others 27.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.0%
2. First word of command is invalid 14.1%
3. FIND command with invalid index name 7.7%
4. NS command - no next screen 5.3%
5. FIND command retrieves >1 book 5.2%
6. DISPLAY command - middle of >1 screen 4.1%
7. Add-on without index name 3.8%
8. DISPLAY command-first of >1 screen 3.6%
9. FIND command with zero results 3.3%
10. DISPLAY command - last of >1 screen 2.6%
11. All others 34.8%
Ten most frequent SHOW requests:
1. HISTORY 61.3%
2. MAIL STATUS 16.0%
3. SEARCH 15.3%
4. SETTINGS 4.7%
5. MEDLINE GLOSSARY 1.3%
6. 9903 0.7%
7. UPDATE 0.7%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)