MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 11/04/00 through 11/10/00
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 176 593 769
Davis 26 635 157 818
Irvine 0 301 0 301
Los Angeles 0 325 131 456
Riverside 0 10 109 119
San Diego 89 442 10 541
San Francisco 107 0 1,442 1,549
Santa Barbara 0 13 25 38
Santa Cruz 13 7 103 123
Stanford 236
Other (including DLA) 0 0 1,771 1,771
_______________ _________ _________ _________
Total: 235 1,909 4,341 6,721
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 5,006 15,705 207,995
MED90 database 813 1,816 16,406
MED85 database 382 720 7,107
MED80 database 244 486 4,840
MED75 database 151 268 1,320
MED66 database 125 279 2,485
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 33 110 1,177
2-4 a.m. 21 57 348
4-6 a.m. 22 67 470
6-8 a.m. 112 335 4,016
8-10 a.m. 756 2,117 26,336
10-12 a.m. 1,375 3,894 56,305
12-2 p.m. 1,206 3,554 37,462
2-4 p.m. 1,323 3,648 43,584
4-6 p.m. 988 2,680 27,290
6-8 p.m. 453 1,414 18,083
8-10 p.m. 293 928 16,403
10-12 p.m. 139 470 8,679
__________ __________ __________ _________________
Total: 6,721 19,274 240,153
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 14:35 14:25 16:20 14:16
Median 10:12 8:26 8:03 8:44
Total:
Average 14:35 14:25 16:20 14:16
Median 10:12 8:26 8:03 8:44
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.9 3.1
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 6,721 100%
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 852.2
Retrievals per search - median 9.0
Retrievals per search - standard deviation 8467.3
Percent of searches completed with 0 results 21.1%
Percent of searches entered that are long 0.5%
Percent of long searches completed 60.9%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,697 24.7%
DISPLAY (excluding automatic displays) 21,127 35.6%
BROWSE 385 0.6%
SELECT 217 0.4%
HELP 506 0.9%
EXPLAIN 396 0.7%
SAVE 4,401 7.4%
SET/RESET 3,090 5.2%
SHOW 229 0.4%
ADD-ON (AND, OR, AND NOT) 3,717 6.3%
LOGON or LOGOFF 7,785 13.1%
COMMENT 1 0.0%
OTHER 2,847 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 5,848 28.5% 1,253 21.4% 11 90.9 516.7
TITLE WORD 2,330 11.4% 762 32.7% 10 557.2 4787.9
EXACT TITLE 143 0.7% 64 44.8% 1 9.8 41.4
JOURNAL 970 4.7% 323 33.3% 191 2580.5 7416.0
EXACT JOURNAL 359 1.8% 140 39.0% 288 2127.4 4540.9
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 7,570 37.0% 1,393 18.4% 32 1749.2 14169.1
SUBJECT WORD 33 0.2% 16 48.5% 84 531.6 1147.4
SUBJECT 656 3.2% 265 40.4% 153 2231.2 5499.2
MAJOR SUBJECT 55 0.3% 5 9.1% 103 1982.5 5460.0
EXACT SUBJECT 287 1.4% 53 18.5% 79 1334.1 5270.3
MAJOR XS 55 0.3% 9 16.4% 409 1385.1 3716.0
EXPLODE XS 196 1.0% 16 8.2% 51 2847.0 11293.3
EXPLODE MAJOR 14 0.1% 1 7.1% 292 2039.8 3381.8
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 728 3.6% 106 14.6% 14 143.1 488.4
LANGUAGE 514 2.5% 20 3.9% 80 574.9 0.0
PUB TYPE 380 1.9% 22 5.8% 32 268.5 1416.1
Other indexes 328 1.6% 29 8.8% 1 45.0 265.7
By number of indexes:
Multiple 5,847 31.9% 1,320 22.6% 13 346.5 3075.7
Single 12,501 68.1% 2,587 20.7% 29 1487.2 11563.6
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 67 17.6% 6 9.0% 9 14.1 17.2
JOURNAL 60 15.8% 12 20.0% 2 10.0 22.0
EXACT JOURNAL 3 0.8% 1 33.3% 1 1.0 0.0
SUBJECT 218 57.4% 36 16.5% 4 45.5 390.3
EXACT SUBJECT 32 8.4% 6 18.8% 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 380 100% 61 16.1% 3 30.3 295.2
LIMITS:
Number of times limits (bit strings) used: 1,388
Use by bit string (percentage):
Current year minus 5 19.3%
Current year minus 4 0.0%
Current year minus 3 0.4%
Current year minus 2 0.1%
Current year minus 1 0.2%
Current year 0.1%
English Language 38.8%
French Language 0.0%
Japanese Language 0.1%
German Language 0.0%
Russian Language 0.0%
XS Abstract 0.6%
XS Adolescence 0.2%
XS Adult 0.0%
XS Aged 0.0%
XS Animal 0.1%
XS Case Report 0.1%
XS Child 0.6%
XS Comparative Studies 0.6%
XS English Abstract 0.0%
XS Female 0.1%
XS Human 9.7%
XS Infant 0.0%
XS Infant, Newborn 0.1%
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 26.4%
PT Journal Article 0.3%
SUBSET AIM 1.8%
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: 6,863
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.3%
Percentage of ORs 4.2%
Percentage of AND NOTs 1.5%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
BRIEF 63.8%
LONG 0.8%
MEDLINE 1.0%
FIELDS 4.7%
PERIODICALS 0.0%
BROWSE REVIEW 1.3%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.0%
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 37.5%
2. First word of command is invalid 28.0%
3. FIND command with invalid index name 7.4%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 2.4%
6. Search term missing from search command 2.0%
7. Add-on search with invalid index name 1.8%
8. Valid command at an inappropriate time 1.7%
9. NS of SHOW/EXP command-no next screen 1.3%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.1%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 18.9%
2. LOCATE (article dbs w/o monographs) 12.6%
3. FIND 7.1%
4. MEDLINE BACKFILES 6.1%
5. ADD-ON SEARCH 5.6%
6. Unrecognized term 4.8%
7. COMMANDS 4.8%
8. INDEXES 3.3%
9. MAIL 2.8%
10. DATABASES 2.5%
11. All others 27.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.0%
2. First word of command is invalid 16.5%
3. FIND command with invalid index name 7.9%
4. DISPLAY command-first of >1 screen 6.8%
5. FIND command retrieves >1 book 6.1%
6. DISPLAY command - middle of >1 screen 5.0%
7. DISPLAY command - last of >1 screen 3.3%
8. NS of SHOW/EXP command-no next screen 2.8%
9. NS command - no next screen 2.7%
10. PA command modified to Medline format 1.9%
11. All others 31.6%
Ten most frequent SHOW requests:
1. HISTORY 72.5%
2. SEARCH 15.4%
3. MAIL STATUS 3.8%
4. SETTINGS 2.7%
5. MEDLINE GLOSSARY 2.2%
6. UPDATE 1.6%
7. MEDLINE NEWS 1.1%
8. DATABASES 0.5%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)