MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 07/21/01 through 07/27/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 49 211 260
Davis 201 3 204
Irvine 16 0 16
Los Angeles 2 61 63
Riverside 15 53 68
San Diego 14 46 60
San Francisco 18 0 18
Santa Barbara 2 51 53
Santa Cruz 11 51 62
Lawrence Berkeley 0 5 5
Lawrence Livermore 0 7 7
Los Alamos 0 0 0
Other - UC 0 10 10
Other-Network UC n/a 458 458
_______ ______ _____
328 956 1,284
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 1,128 3,417 31,067
BIO88 156 324 2,786
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 16 46 471
2-4 a.m. 14 53 336
4-6 a.m. 20 67 947
6-8 a.m. 48 122 660
8-10 a.m. 154 393 4,191
10-12 a.m. 262 665 5,862
12-2 p.m. 214 691 7,003
2-4 p.m. 262 845 8,002
4-6 p.m. 174 506 3,548
6-8 p.m. 74 207 1,390
8-10 p.m. 24 85 1,131
10-12 p.m. 22 61 312
__________ __________ __________ _________________
Total: 1,284 3,741 33,853
1.2 FIND commands
__________________
Zero results may indicate no access to the database
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 222 560 782
Davis 756 14 770
Irvine 39 0 39
Los Angeles 4 310 314
Riverside 32 132 164
San Diego 31 106 137
San Francisco 58 0 58
Santa Barbara 5 172 177
Santa Cruz 52 111 163
Lawrence Berkeley 0 8 8
Lawrence Livermore 0 22 22
Los Alamos 0 0 0
Other - UC 0 20 20
Other-Network UC n/a 1,087 1,087
_______ ______ _____
1,199 2,542 3,741
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,533 6,460 7,993
Davis 7,669 102 7,771
Irvine 478 0 478
Los Angeles 7 2,649 2,656
Riverside 205 1,939 2,144
San Diego 91 761 852
San Francisco 380 0 380
Santa Barbara 2 1,400 1,402
Santa Cruz 127 530 657
Lawrence Berkeley 0 263 263
Lawrence Livermore 0 174 174
Los Alamos 0 0 0
Other - UC 0 201 201
Other-Network UC n/a 8,882 8,882
_______ ______ _____
10,492 23,361 33,853
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 5.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.1
2.0 BIOSIS Databases Detailed Statistics
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Median session length (minutes:seconds) 11:48
Average session length (minutes:seconds) 16:40
Longest session recorded (minutes:seconds) 432:20
Average number of searches completed per session 2.9
Retrievals per search - median 9.0
Retrievals per search - average 339.3
Retrievals per search - standard deviation 2687.1
Percent of searches completed with 0 results 22.5%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 54.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,387 32.4%
DISPLAY (excluding automatic displays) 4,040 38.7%
BROWSE 0 0.0%
HELP 74 0.7%
EXPLAIN 71 0.7%
SET/RESET 704 6.7%
SHOW 27 0.3%
ADD ON (AND, OR, AND NOT) 354 3.4%
LOGON or LOGOFF 1,305 12.5%
COMMENT 0 0.0%
SAVE 166 1.6%
USE 3 0.0%
OTHER 312 3.0%
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 AUTHOR 1,466 39.0% 257 17.5% 21 156.4 729.6
TITLE WORD 510 13.6% 220 43.1% 5 223.6 2299.3
EXACT TITLE 25 0.7% 12 48.0% 14 86.1 230.4
KEYWORD 1,216 32.4% 243 20.0% 19 773.2 4792.9
JOURNAL 184 4.9% 68 37.0% 287 1110.6 2575.9
EXACT JOURNAL 60 1.6% 20 33.3% 543 2185.6 4533.8
SOURCE 0 0.0% 0 0.0% 0 0.0 0.0
CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
BIOSYS NAMES 0 0.0% 0 0.0% 0 0.0 0.0
BIOSYS CODES 0 0.0% 0 0.0% 0 0.0 0.0
SUPERTAXA 1 0.0% 0 0.0% 92 92.0 0.0
MAJ CONCEPT CDES 0 0.0% 0 0.0% 0 0.0 0.0
CONCEPT CODES 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.1% 2 100% 0 0.0 0.0
DATE 9 0.2% 1 11.1% 10 327.5 896.0
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 1 0.0% 0 0.0% 8 8.0 0.0
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 11 0.3% 1 9.1% 31 171.7 262.4
ACCESSION NO. 0 0.0% 0 0.0% 0 0.0 0.0
ISSN 4 0.1% 4 100% 0 0.0 0.0
ISBN 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 160 4.3% 21 13.1% 4 84.7 501.6
EXACT PE 27 0.7% 0 0.0% 6 22.1 45.6
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 80 2.1% 13 16.2% 8 26.9 47.3
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 387 11.6% 117 30.2% 5 29.9 166.0
Single 2,960 88.4% 620 20.9% 24 524.0 3360.3
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROWSEs No. Index Median Avg. Dev.
______ _______ ______ _______ ______ _______ _______
By index:
CONCEPT CODES 0 0.0% 0 0.0% 0.0 0.0 0.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.2%
SHORT 82.8%
LONG 2.5%
TAGS 0.4%
FIELDS 2.2%
BROWSE REVIEW 0.0%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 6.8%
COMMENTS 0.0%
Other 1.0%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 35.6%
2. First word of command is invalid 27.9%
3. FIND command with invalid index name 11.7%
4. DISPLAY command contains invalid word 3.1%
5. PS command - no previous screen 2.9%
6. Search term missing from search command 2.5%
7. Max. # of ports to a Z39 db are in use 1.6%
8. DATE search with unrecognized word 1.5%
9. Valid command at an inappropriate time 1.2%
10. DISPLAY command - no FIND results 1.1%
11. All others 10.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 22.5%
2. GUIDE 15.5%
3. BIOSIS DATABASE 9.9%
4. COMMANDS 4.2%
5. BIOSIS BACKFILES 4.2%
6. DATABASES 4.2%
7. ADDON SEARCH 4.2%
8. INDEXES 2.8%
9. FIND 2.8%
10. BIOSIS NEWS 2.8%
11. All others 26.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 18.6%
2. First word of command is invalid 13.8%
3. DISPLAY command-first of >1 screen 11.0%
4. FIND command with invalid index name 10.3%
5. DISPLAY command - middle of >1 screen 6.9%
6. FIND command retrieves >1 book 4.8%
7. DISPLAY command - last of >1 screen 4.1%
8. Multi-index search with zero results 3.4%
9. 3 HELP commands issued from same code 2.8%
10. SET DB command entered w/o modifier 2.1%
11. All others 22.1%
Ten most frequent SHOW requests:
1. HISTORY 74.1%
2. SEARCH 14.8%
3. BIOSIS NEWS 3.7%
4. Z39.50 NEWS 3.7%
5. MAIL STATUS 3.7%
11. All others 0.0%
BIOmm/dd bio MELVYL BIOSIS DATABASES TELNET STATISTICS (weekly)