MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 03/31/01 through 04/06/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 117 542 659
Davis 22 957 58 1,037
Irvine 0 411 0 411
Los Angeles 0 7 129 136
Riverside 0 22 48 70
San Diego 107 540 25 672
San Francisco 73 0 1,390 1,463
Santa Barbara 0 1 64 65
Santa Cruz 3 5 113 121
Stanford 235
Other (including DLA) 0 0 2,149 2,149
_______________ _________ _________ _________
Total: 205 2,060 4,518 7,018
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,239 16,044 185,934
MED90 database 803 1,698 10,852
MED85 database 398 730 4,770
MED80 database 278 545 3,173
MED75 database 174 316 1,965
MED66 database 126 236 1,104
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 45 231 2,501
2-4 a.m. 15 30 298
4-6 a.m. 452 492 490
6-8 a.m. 152 379 3,193
8-10 a.m. 721 2,089 18,136
10-12 a.m. 1,170 3,663 40,846
12-2 p.m. 1,158 3,237 30,193
2-4 p.m. 1,349 3,876 39,779
4-6 p.m. 1,050 2,956 36,277
6-8 p.m. 460 1,307 17,026
8-10 p.m. 263 764 11,754
10-12 p.m. 183 545 7,305
__________ __________ __________ _________________
Total: 7,018 19,569 207,798
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 16:49 12:27 24:52 13:30
Median 11:23 5:25 12:43 7:03
Total:
Average 16:49 12:27 24:52 13:30
Median 11:23 5:25 12:43 7:03
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.5
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 7,018 100%
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 818.5
Retrievals per search - median 9.0
Retrievals per search - standard deviation 7647.3
Percent of searches completed with 0 results 22.2%
Percent of searches entered that are long 0.5%
Percent of long searches completed 66.4%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,919 24.7%
DISPLAY (excluding automatic displays) 20,538 34.0%
BROWSE 367 0.6%
SELECT 157 0.3%
HELP 359 0.6%
EXPLAIN 283 0.5%
SAVE 4,723 7.8%
SET/RESET 3,546 5.9%
SHOW 446 0.7%
ADD-ON (AND, OR, AND NOT) 3,752 6.2%
LOGON or LOGOFF 8,258 13.7%
COMMENT 0 0.0%
OTHER 3,128 5.2%
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 5,933 28.8% 1,266 21.3% 12 122.1 862.8
TITLE WORD 2,527 12.3% 811 32.1% 8 421.0 1816.3
EXACT TITLE 142 0.7% 59 41.5% 1 19.5 111.8
JOURNAL 1,001 4.9% 307 30.7% 214 1960.2 4795.3
EXACT JOURNAL 286 1.4% 57 19.9% 598 2788.5 4932.4
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 7,176 34.8% 1,306 18.2% 32 1529.2 12439.6
SUBJECT WORD 13 0.1% 8 61.5% 21 748.4 1632.7
SUBJECT 568 2.8% 181 31.9% 184 2831.2 11001.0
MAJOR SUBJECT 200 1.0% 38 19.0% 133 6228.4 15273.2
EXACT SUBJECT 263 1.3% 72 27.4% 102 1599.0 4495.7
MAJOR XS 27 0.1% 6 22.2% 440 1304.9 2219.0
EXPLODE XS 45 0.2% 7 15.6% 307 2106.8 5025.7
EXPLODE MAJOR 21 0.1% 0 0.0% 1,440 18771.2 61697.5
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 938 4.5% 176 18.8% 15 198.9 857.1
LANGUAGE 340 1.6% 9 2.6% 95 697.5 0.0
PUB TYPE 364 1.8% 35 9.6% 46 1516.2 5537.9
Other indexes 765 3.7% 470 61.4% 1 80.2 298.5
By number of indexes:
Multiple 6,074 32.6% 1,363 22.4% 12 379.7 3073.2
Single 12,548 67.4% 2,819 22.5% 34 1455.5 10579.3
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 21 5.8% 3 14.3% 2 47.6 146.6
JOURNAL 90 24.7% 24 26.7% 2 9.3 16.4
EXACT JOURNAL 16 4.4% 7 43.8% 1 2.8 4.6
SUBJECT 224 61.5% 45 20.1% 3 42.5 339.5
EXACT SUBJECT 13 3.6% 1 7.7% 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 364 100% 80 22.0% 2 32.1 272.3
LIMITS:
Number of times limits (bit strings) used: 1,223
Use by bit string (percentage):
Current year minus 5 21.6%
Current year minus 4 0.0%
Current year minus 3 1.4%
Current year minus 2 0.7%
Current year minus 1 0.2%
Current year 0.2%
English Language 28.9%
French Language 0.1%
Japanese Language 0.0%
German Language 0.0%
Russian Language 0.0%
XS Abstract 1.7%
XS Adolescence 0.2%
XS Adult 0.3%
XS Aged 0.2%
XS Animal 0.7%
XS Case Report 0.0%
XS Child 0.4%
XS Comparative Studies 0.0%
XS English Abstract 0.0%
XS Female 0.2%
XS Human 9.4%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.3%
XS Rats 0.5%
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 26.5%
PT Journal Article 0.1%
SUBSET AIM 4.1%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.3%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 7,150
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 92.4%
Percentage of ORs 4.8%
Percentage of AND NOTs 2.8%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
BRIEF 63.8%
LONG 1.1%
MEDLINE 1.1%
FIELDS 4.1%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.1%
Other 25.5%
4.0 Error, EXPLAIN, HELP statistics (ASSIST & COMMAND)
_______________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. NS command - no next screen 35.9%
2. First word of command is invalid 24.1%
3. DISPLAY command - no FIND results 9.1%
4. FIND command with invalid index name 6.0%
5. DISPLAY command contains invalid word 3.9%
6. Add-on search with invalid index name 1.7%
7. PS command - no previous screen 1.7%
8. Valid command at an inappropriate time 1.5%
9. Search term missing from search command 1.5%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. LOCATE (article dbs w/o monographs) 17.0%
2. BOOKS DATABASE 16.6%
3. FIND 9.5%
4. MEDLINE BACKFILES 6.4%
5. Unrecognized term 6.0%
6. MAIL 4.9%
7. COMMANDS 4.9%
8. INDEXES 3.5%
9. 1752 2.8%
10. DATABASES 2.5%
11. All others 26.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.2%
2. First word of command is invalid 16.2%
3. DISPLAY command-first of >1 screen 7.6%
4. FIND command with invalid index name 6.9%
5. NS command - no next screen 6.1%
6. FIND command retrieves >1 book 4.2%
7. DISPLAY command - middle of >1 screen 3.7%
8. NS of SHOW/EXP command-no next screen 3.6%
9. DISPLAY command - last of >1 screen 2.8%
10. DISPLAY command-complete in one screen 2.5%
11. All others 25.8%
Ten most frequent SHOW requests:
1. HISTORY 68.9%
2. SEARCH 14.8%
3. SETTINGS 4.9%
4. MEDLINE GLOSSARY 2.5%
5. TIME 1.6%
6. MEDLINE STATISTICS 1.6%
7. UPDATE 1.6%
8. TIMEOUT SETTING 0.8%
9. 0997 0.8%
10. SYSTEM STATISTICS 0.8%
11. All others 1.6%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)