MELVYL MEDLINE DATABASES TELNET STATISTICS
Time period: 03/17/01 through 03/23/01
1.0 SUMMARY STATISTICS
_______________________
Sessions: Medical/Health/
Life Sciences All Other
Libraries Libraries Remote Total
_______________ _________ _________ _________
Berkeley 0 219 643 862
Davis 29 537 80 646
Irvine 0 388 0 388
Los Angeles 0 150 123 273
Riverside 0 6 52 58
San Diego 166 455 57 678
San Francisco 120 0 1,292 1,412
Santa Barbara 0 0 19 19
Santa Cruz 0 5 48 53
Stanford 250
Other (including DLA) 0 0 1,874 1,874
_______________ _________ _________ _________
Total: 315 1,760 4,188 6,513
Relative use of MEDLINE databases
Number of Number of Number of
Sessions FIND commands Records Displayed
________ _____________ _________________
MED (current) 4,684 15,451 151,508
MED90 database 756 1,602 11,231
MED85 database 435 794 4,604
MED80 database 301 574 2,955
MED75 database 189 395 2,026
MED66 database 148 336 1,955
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 35 224 2,025
2-4 a.m. 30 113 2,749
4-6 a.m. 57 146 1,028
6-8 a.m. 116 298 3,584
8-10 a.m. 702 1,861 14,563
10-12 a.m. 1,261 3,768 31,860
12-2 p.m. 1,180 3,542 36,204
2-4 p.m. 1,425 4,043 34,644
4-6 p.m. 932 2,704 24,397
6-8 p.m. 396 1,291 10,495
8-10 p.m. 221 589 7,600
10-12 p.m. 158 573 5,130
__________ __________ __________ _________________
Total: 6,513 19,152 174,279
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 17:31 13:39 15:20 13:58
Median 9:34 8:05 10:19 8:16
Total:
Average 17:31 13:39 15:20 13:58
Median 9:34 8:05 10:19 8:16
Response time (in seconds): Std.
Avg. Dev.
______ ______
Search - from receipt of command at DLA until 0.5 1.8
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 6,513 100%
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 796.9
Retrievals per search - median 8.0
Retrievals per search - standard deviation 7134.0
Percent of searches completed with 0 results 22.0%
Percent of searches entered that are long 0.4%
Percent of long searches completed 71.2%
COMMANDS entered, by type, excluding errors:
% of all
Total Commands
__________ __________
FIND 14,519 25.8%
DISPLAY (excluding automatic displays) 19,595 34.9%
BROWSE 364 0.6%
SELECT 178 0.3%
HELP 359 0.6%
EXPLAIN 287 0.5%
SAVE 4,071 7.2%
SET/RESET 3,151 5.6%
SHOW 193 0.3%
ADD-ON (AND, OR, AND NOT) 3,691 6.6%
LOGON or LOGOFF 7,114 12.7%
COMMENT 0 0.0%
OTHER 2,649 4.7%
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 6,250 30.3% 1,349 21.6% 12 82.8 471.2
TITLE WORD 2,734 13.2% 871 31.9% 5 346.4 2483.9
EXACT TITLE 119 0.6% 52 43.7% 1 14.7 52.6
JOURNAL 908 4.4% 278 30.6% 60 2088.8 5884.5
EXACT JOURNAL 258 1.2% 89 34.5% 651 2275.1 3875.2
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 7,217 35.0% 1,453 20.1% 30 1427.1 10472.0
SUBJECT WORD 18 0.1% 10 55.6% 8 649.6 1756.4
SUBJECT 704 3.4% 268 38.1% 255 4350.8 15332.4
MAJOR SUBJECT 44 0.2% 5 11.4% 130 1955.5 4648.4
EXACT SUBJECT 427 2.1% 98 22.9% 169 3500.9 12879.9
MAJOR XS 55 0.3% 3 5.5% 402 698.2 1186.3
EXPLODE XS 100 0.5% 17 17.0% 161 7936.6 22407.3
EXPLODE MAJOR 13 0.1% 1 7.7% 285 4497.3 9669.7
TREE NUMBER 4 0.0% 0 0.0% 220138 165484 110289
MAJOR TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
DATE 882 4.3% 220 24.9% 12 157.5 1194.8
LANGUAGE 447 2.2% 19 4.3% 98 493.3 0.0
PUB TYPE 363 1.8% 27 7.4% 34 204.6 694.9
Other indexes 160 0.8% 24 15.0% 1 72.9 262.3
By number of indexes:
Multiple 6,169 33.9% 1,519 24.6% 11 541.5 6684.8
Single 12,004 66.1% 2,561 21.3% 31 1340.5 8962.4
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 12 3.3% 1 8.3% 7 39.8 89.3
JOURNAL 45 12.4% 8 17.8% 2 15.9 45.7
EXACT JOURNAL 18 5.0% 4 22.2% 1 2.9 4.3
SUBJECT 256 70.5% 50 19.5% 2 56.5 570.0
EXACT SUBJECT 31 8.5% 4 12.9% 1 2.3 5.8
TREE NUMBER 1 0.3% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 363 100% 67 18.5% 1 43.1 476.2
LIMITS:
Number of times limits (bit strings) used: 1,232
Use by bit string (percentage):
Current year minus 5 22.8%
Current year minus 4 0.0%
Current year minus 3 0.5%
Current year minus 2 0.3%
Current year minus 1 0.2%
Current year 0.2%
English Language 37.1%
French Language 0.0%
Japanese Language 0.1%
German Language 0.1%
Russian Language 0.0%
XS Abstract 0.8%
XS Adolescence 0.1%
XS Adult 0.2%
XS Aged 1.5%
XS Animal 0.0%
XS Case Report 0.0%
XS Child 0.3%
XS Comparative Studies 0.1%
XS English Abstract 0.0%
XS Female 0.4%
XS Human 9.3%
XS Infant 0.0%
XS Infant, Newborn 0.1%
XS Male 0.0%
XS Mice 0.0%
XS Middle Age 1.2%
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 21.4%
PT Journal Article 0.2%
SUBSET AIM 1.9%
SUBSET Indexing priority 1,2 0.0%
SUBSET Nursing journals 1.0%
SUBSET Dental journals 0.0%
SUBSET Cancer core journals 0.2%
BOOLEAN:
Number of searches with Booleans: 6,999
(FIND, BROWSE, SELECT, ADD-ON)
Percentage of ANDs 94.3%
Percentage of ORs 4.5%
Percentage of AND NOTs 1.2%
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
BRIEF 62.5%
LONG 1.7%
MEDLINE 1.1%
FIELDS 3.5%
PERIODICALS 0.0%
BROWSE REVIEW 1.2%
BROWSE LONG 0.7%
BROWSE FIELDS 0.0%
BROWSE MEDLINE 0.0%
Other 26.1%
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 38.3%
2. First word of command is invalid 26.9%
3. FIND command with invalid index name 6.9%
4. DISPLAY command contains invalid word 4.2%
5. Search term missing from search command 2.2%
6. PS command - no previous screen 2.0%
7. Add-on search with invalid index name 1.8%
8. DISPLAY command - no FIND results 1.6%
9. Valid command at an inappropriate time 1.5%
10. DISPLAY command-record numbers too large 1.0%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. BOOKS DATABASE 13.6%
2. LOCATE (article dbs w/o monographs) 11.8%
3. FIND 9.8%
4. MEDLINE BACKFILES 8.7%
5. COMMANDS 6.3%
6. Unrecognized term 4.9%
7. INDEXES 4.9%
8. DISPLAY 4.5%
9. ADD-ON SEARCH 3.1%
10. PUBLICATION TYPES 3.1%
11. All others 29.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.0%
2. First word of command is invalid 12.7%
3. DISPLAY command-first of >1 screen 7.3%
4. FIND command with invalid index name 5.4%
5. DISPLAY command - middle of >1 screen 5.4%
6. FIND command retrieves >1 book 4.3%
7. PS command - no previous screen 3.1%
8. NS command - no next screen 2.8%
9. FIND command with zero results 2.6%
10. Multi-index search with zero results 2.6%
11. All others 29.3%
Ten most frequent SHOW requests:
1. HISTORY 80.7%
2. SEARCH 9.2%
3. MEDLINE NEWS 3.4%
4. LOCAL INFORMATION 1.7%
5. LANGUAGES 0.8%
6. PAGESIZE 0.8%
7. TIME 0.8%
8. SUBSETS 0.8%
9. SETTINGS 0.8%
10. MEDLINE GLOSSARY 0.8%
11. All others 0.0%
MEDmm/dd med MELVYL MEDLINE DATABASES TELNET STATISTICS (weekly)