MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 04/01/99 through 04/30/99
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 3,604 7,429 11,033
Davis 363 6,477 1,322 8,162
Irvine 0 5,316 0 5,316
Los Angeles 0 4,690 2,360 7,050
Riverside 2 514 858 1,374
San Diego 1,124 5,176 940 7,240
San Francisco 820 0 17,083 17,903
Santa Barbara 0 353 608 961
Santa Cruz 857 250 858 1,965
Stanford 4,873
Other (including DLA) 0 0 17,331 17,331
_______________ _________ _________ _________
Total: 3,166 26,380 48,789 83,208
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 59,432 200,676 2,310,955
MED90 database 10,430 24,365 224,077
MED85 database 5,793 12,126 95,412
MED80 database 3,732 7,580 53,745
MED75 database 2,281 4,698 35,635
MED66 database 1,540 3,525 32,185
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 991 3,042 44,514
2-4 a.m. 302 1,018 9,326
4-6 a.m. 284 691 10,482
6-8 a.m. 1,305 4,002 37,146
8-10 a.m. 8,116 23,787 230,266
10-12 a.m. 15,407 45,636 467,659
12-2 p.m. 14,804 44,311 446,833
2-4 p.m. 17,319 53,035 558,190
4-6 p.m. 12,575 38,831 492,624
6-8 p.m. 5,798 18,039 211,428
8-10 p.m. 3,921 12,555 148,034
10-12 p.m. 2,386 8,023 95,507
__________ __________ __________ _________________
Total: 83,208 252,970 2,752,009
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 15:25 13:56 13:58 13:50
Median 10:12 8:32 8:35 8:29
Total:
Average 15:25 13:56 13:58 13:50
Median 10:12 8:32 8:35 8:29
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 1.0 3.5
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 83,208 100%
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 3.0
Retrievals per search - average 645.1
Retrievals per search - median 9.0
Retrievals per search - standard deviation 5866.2
Percent of searches completed with 0 results 21.8%
Percent of searches entered that are long 0.4%
Percent of long searches completed 55.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 198,285 25.2%
DISPLAY (excluding automatic displays) 290,815 37.0%
BROWSE 4,172 0.5%
SELECT 2,520 0.3%
HELP 10,278 1.3%
EXPLAIN 7,869 1.0%
SAVE 52,525 6.7%
SET/RESET 36,841 4.7%
SHOW 2,904 0.4%
ADD-ON (AND, OR, AND NOT) 46,132 5.9%
LOGON or LOGOFF 97,748 12.4%
COMMENT 5 0.0%
OTHER 35,343 4.5%
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 76,246 28.1% 15,647 20.5% 11 103.4 1339.0
TITLE WORD 26,511 9.8% 8,250 31.1% 9 387.6 4726.8
EXACT TITLE 2,154 0.8% 999 46.4% 1 35.1 228.4
JOURNAL 11,531 4.2% 3,682 31.9% 121 1839.8 5457.7
EXACT JOURNAL 3,608 1.3% 1,212 33.6% 255 1882.7 4856.9
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 108,880 40.1% 21,433 19.7% 29 1110.9 8456.4
SUBJECT WORD 521 0.2% 253 48.6% 205 2543.8 12283.3
SUBJECT 11,486 4.2% 4,833 42.1% 209 2340.2 8387.0
MAJOR SUBJECT 577 0.2% 123 21.3% 167 1506.6 4697.4
EXACT SUBJECT 3,302 1.2% 722 21.9% 96 975.0 3567.9
MAJOR XS 554 0.2% 134 24.2% 114 849.9 2297.3
EXPLODE XS 1,396 0.5% 217 15.5% 123 4422.1 19167.0
EXPLODE MAJOR 239 0.1% 37 15.5% 104 2447.5 7794.2
TREE NUMBER 23 0.0% 2 8.7% 8,180 78142.2 152820
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 9,125 3.4% 1,721 18.9% 12 209.2 1626.2
LANGUAGE 7,731 2.8% 527 6.8% 66 606.1 0.0
PUB TYPE 4,140 1.5% 371 9.0% 32 239.7 1117.2
Other indexes 3,055 1.1% 455 14.9% 1 341.4 4188.9
By number of indexes:
Multiple 73,682 30.3% 16,817 22.8% 12 344.6 4553.4
Single 169,883 69.7% 36,570 21.5% 29 1062.4 7459.7
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 194 4.7% 29 14.9% 4 23.4 72.4
JOURNAL 502 12.1% 110 21.9% 2 92.9 287.1
EXACT JOURNAL 99 2.4% 19 19.2% 1 3.3 7.3
SUBJECT 3,169 76.5% 606 19.1% 2 26.0 234.4
EXACT SUBJECT 125 3.0% 37 29.6% 1 1.1 1.1
TREE NUMBER 53 1.3% 4 7.5% 1 117.2 347.7
By number of indexes:
Multiple 2 0.0% 2 100% 0 0.0 0.0
Single 4,138 99.9% 801 19.4% 2 33.8 233.4
LIMITS:
Number of times limits (bit strings) used: 14,799
Use by bit string (percentage):
Current year minus 5 0.0%
Current year minus 4 0.0%
Current year minus 3 1.9%
Current year minus 2 0.4%
Current year minus 1 0.3%
Current year 0.6%
English Language 53.3%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.9%
XS Adolescence 0.1%
XS Adult 0.4%
XS Aged 0.4%
XS Animal 0.2%
XS Case Report 0.0%
XS Child 0.7%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.4%
XS Human 9.1%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.1%
XS Rats 0.1%
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 25.8%
PT Journal Article 0.3%
SUBSET AIM 4.3%
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: 84,859
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 95.5%
Percentage of ORs 2.8%
Percentage of AND NOTs 1.7%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.6%
BRIEF 64.2%
LONG 0.8%
MEDLINE 1.1%
FIELDS 2.4%
PERIODICALS 0.0%
BROWSE REVIEW 1.0%
BROWSE LONG 0.4%
BROWSE FIELDS 0.1%
BROWSE MEDLINE 0.0%
Other 28.3%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 10.3%
Ten most frequent errors:
1. NS command - no next screen 37.4%
2. First word of command is invalid 27.8%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 3.9%
5. PS command - no previous screen 2.9%
6. Valid command at an inappropriate time 2.0%
7. Add-on search with invalid index name 1.8%
8. Search term missing from search command 1.6%
9. NS of SHOW/EXP command-no next screen 1.2%
10. DISPLAY command-record numbers too large 1.1%
11. All others 13.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 16.4%
2. BOOKS DATABASE 12.8%
3. FIND 8.3%
4. MEDLINE BACKFILES 7.7%
5. Unrecognized term 5.5%
6. COMMANDS 5.5%
7. ADD-ON SEARCH 4.0%
8. DISPLAY 3.9%
9. INDEXES 3.3%
10. DATABASES 2.9%
11. All others 29.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 19.5%
2. First word of command is invalid 15.8%
3. DISPLAY command-first of >1 screen 7.2%
4. FIND command with invalid index name 6.7%
5. FIND command retrieves >1 book 4.9%
6. DISPLAY command - middle of >1 screen 4.4%
7. NS command - no next screen 3.7%
8. DISPLAY command - last of >1 screen 3.1%
9. NS of SHOW/EXP command-no next screen 2.5%
10. FIND command with zero results 2.4%
11. All others 29.6%
Ten most frequent SHOW requests:
1. HISTORY 58.0%
2. SEARCH 25.4%
3. MAIL STATUS 6.7%
4. SETTINGS 3.3%
5. MEDLINE GLOSSARY 2.3%
6. MAIL SETTINGS 1.0%
7. MEDLINE NEWS 0.5%
8. MEDLINE STATISTICS 0.4%
9. MEDLINE LOADING STATISTICS 0.3%
10. DISPLAY 0.2%
11. All others 1.8%