MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 07/01/00 through 07/07/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 116 580 696
Davis 36 641 147 824
Irvine 0 370 0 370
Los Angeles 0 346 180 526
Riverside 0 14 59 73
San Diego 140 568 94 802
San Francisco 67 0 1,867 1,934
Santa Barbara 0 6 27 33
Santa Cruz 6 7 46 59
Stanford 261
Other (including DLA) 0 0 1,664 1,664
_______________ _________ _________ _________
Total: 249 2,068 4,664 7,242
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,047 16,621 183,347
MED90 database 977 2,495 15,568
MED85 database 532 1,177 7,140
MED80 database 327 757 4,209
MED75 database 212 498 2,112
MED66 database 147 363 2,252
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 103 246 2,721
2-4 a.m. 13 27 342
4-6 a.m. 18 59 618
6-8 a.m. 97 249 1,974
8-10 a.m. 761 2,288 18,489
10-12 a.m. 1,469 4,347 42,207
12-2 p.m. 1,294 3,749 34,577
2-4 p.m. 1,508 4,436 49,416
4-6 p.m. 1,071 3,341 33,470
6-8 p.m. 462 1,397 14,478
8-10 p.m. 235 941 9,569
10-12 p.m. 211 831 6,767
__________ __________ __________ _________________
Total: 7,242 21,911 214,628
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 14:50 14:50 17:24 14:26
Median 10:22 9:14 12:15 8:58
Total:
Average 14:50 14:50 17:24 14:26
Median 10:22 9:14 12:15 8:58
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.8 2.6
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 7,242 100%
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 691.6
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7126.0
Percent of searches completed with 0 results 21.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed 68.8%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 16,515 25.5%
DISPLAY (excluding automatic displays) 22,457 34.7%
BROWSE 447 0.7%
SELECT 116 0.2%
HELP 426 0.7%
EXPLAIN 357 0.6%
SAVE 5,113 7.9%
SET/RESET 3,389 5.2%
SHOW 326 0.5%
ADD-ON (AND, OR, AND NOT) 4,596 7.1%
LOGON or LOGOFF 8,081 12.5%
COMMENT 0 0.0%
OTHER 2,883 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 6,765 29.0% 1,392 20.6% 12 95.3 454.9
TITLE WORD 2,684 11.5% 830 30.9% 6 434.4 4110.5
EXACT TITLE 180 0.8% 75 41.7% 1 43.6 232.2
JOURNAL 946 4.1% 281 29.7% 171 2281.4 7749.3
EXACT JOURNAL 301 1.3% 84 27.9% 97 1569.7 3093.0
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 8,777 37.6% 1,816 20.7% 28 1357.4 11545.6
SUBJECT WORD 47 0.2% 17 36.2% 305 5008.7 11966.2
SUBJECT 594 2.5% 227 38.2% 128 1334.8 3829.1
MAJOR SUBJECT 78 0.3% 11 14.1% 210 1247.6 3293.4
EXACT SUBJECT 246 1.1% 37 15.0% 145 1849.9 6362.6
MAJOR XS 61 0.3% 4 6.6% 260 673.0 1016.4
EXPLODE XS 171 0.7% 24 14.0% 346 3304.6 9246.3
EXPLODE MAJOR 136 0.6% 18 13.2% 402 4295.5 22643.3
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 890 3.8% 143 16.1% 14 160.3 486.4
LANGUAGE 582 2.5% 26 4.5% 67 488.7 0.0
PUB TYPE 441 1.9% 41 9.3% 15 252.1 1745.1
Other indexes 475 2.0% 59 12.4% 1 37.0 442.9
By number of indexes:
Multiple 6,950 33.0% 1,578 22.7% 10 248.7 2576.7
Single 14,106 67.0% 2,932 20.8% 29 1231.5 9773.6
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 9 2.0% 4 44.4% 1 1.2 0.4
JOURNAL 210 47.6% 77 36.7% 3 11.5 28.3
EXACT JOURNAL 30 6.8% 2 6.7% 1 5.0 19.6
SUBJECT 184 41.7% 30 16.3% 2 70.5 676.8
EXACT SUBJECT 8 1.8% 0 0.0% 1 12.5 32.5
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 441 100% 113 25.6% 2 38.5 464.3
LIMITS:
Number of times limits (bit strings) used: 1,284
Use by bit string (percentage):
Current year minus 5 13.5%
Current year minus 4 0.0%
Current year minus 3 1.7%
Current year minus 2 0.2%
Current year minus 1 0.3%
Current year 0.1%
English Language 47.7%
French Language 0.0%
Japanese Language 0.0%
German Language 0.2%
Russian Language 0.0%
XS Abstract 0.5%
XS Adolescence 0.0%
XS Adult 0.4%
XS Aged 0.0%
XS Animal 0.2%
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 9.3%
XS Infant 0.0%
XS Infant, Newborn 0.0%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 0.0%
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 23.5%
PT Journal Article 0.0%
SUBSET AIM 1.6%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 0.1%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.0%
BOOLEAN:
Number of searches with Booleans: 8,083
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 93.6%
Percentage of ORs 4.1%
Percentage of AND NOTs 2.3%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
BRIEF 64.6%
LONG 0.9%
MEDLINE 0.7%
FIELDS 3.6%
PERIODICALS 0.0%
BROWSE REVIEW 1.1%
BROWSE LONG 0.5%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.5%
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 41.3%
2. First word of command is invalid 25.3%
3. FIND command with invalid index name 6.2%
4. DISPLAY command contains invalid word 3.5%
5. PS command - no previous screen 1.9%
6. Search term missing from search command 1.8%
7. Valid command at an inappropriate time 1.7%
8. Add-on search with invalid index name 1.7%
9. Command containing escape or arrow key 1.1%
10. NS of SHOW/EXP command-no next screen 1.1%
11. All others 14.7%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 15.7%
2. FIND 9.8%
3. LOCATE (article dbs w/o monographs) 7.6%
4. DISPLAY 5.0%
5. INDEXES 5.0%
6. MEDLINE BACKFILES 4.5%
7. Unrecognized term 4.2%
8. DATABASES 4.2%
9. ADD-ON SEARCH 3.9%
10. COMMANDS 3.6%
11. All others 27.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.2%
2. First word of command is invalid 14.6%
3. DISPLAY command-first of >1 screen 6.8%
4. FIND command with invalid index name 6.5%
5. FIND command retrieves >1 book 5.1%
6. DISPLAY command - middle of >1 screen 4.7%
7. NS command - no next screen 4.5%
8. FIND command with zero results 3.2%
9. DISPLAY command - last of >1 screen 2.7%
10. 848 2.7%
11. All others 36.4%
Ten most frequent SHOW requests:
1. HISTORY 86.0%
2. SEARCH 6.8%
3. MAIL STATUS 3.4%
4. MEDLINE GLOSSARY 2.1%
5. SETTINGS 1.3%
6. CAMPUS NEWS 0.4%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)