MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 08/11/01 through 08/17/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 36 268 304
Davis 146 10 156
Irvine 11 0 11
Los Angeles 0 39 39
Riverside 5 22 27
San Diego 15 29 44
San Francisco 48 0 48
Santa Barbara 4 49 53
Santa Cruz 11 24 35
Lawrence Berkeley 0 4 4
Lawrence Livermore 0 15 15
Los Alamos 0 0 0
Other - UC 0 27 27
Other-Network UC n/a 444 444
_______ ______ _____
276 931 1,207
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 1,032 3,157 26,262
BIO88 175 385 3,056
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 11 54 517
2-4 a.m. 2 2 28
4-6 a.m. 11 29 382
6-8 a.m. 43 185 1,547
8-10 a.m. 144 355 2,106
10-12 a.m. 251 688 5,750
12-2 p.m. 228 664 6,014
2-4 p.m. 219 621 5,099
4-6 p.m. 175 568 5,307
6-8 p.m. 81 228 1,292
8-10 p.m. 23 77 546
10-12 p.m. 19 71 730
__________ __________ __________ _________________
Total: 1,207 3,542 29,318
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 124 818 942
Davis 471 19 490
Irvine 38 0 38
Los Angeles 0 93 93
Riverside 25 52 77
San Diego 59 82 141
San Francisco 226 0 226
Santa Barbara 10 169 179
Santa Cruz 50 65 115
Lawrence Berkeley 0 6 6
Lawrence Livermore 0 88 88
Los Alamos 0 0 0
Other - UC 0 83 83
Other-Network UC n/a 1,064 1,064
_______ ______ _____
1,003 2,539 3,542
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 807 10,051 10,858
Davis 3,735 124 3,859
Irvine 226 0 226
Los Angeles 0 1,033 1,033
Riverside 114 333 447
San Diego 38 603 641
San Francisco 1,189 0 1,189
Santa Barbara 39 1,679 1,718
Santa Cruz 649 490 1,139
Lawrence Berkeley 0 50 50
Lawrence Livermore 0 588 588
Los Alamos 0 0 0
Other - UC 0 960 960
Other-Network UC n/a 6,610 6,610
_______ ______ _____
6,797 22,521 29,318
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.2
Standard deviation in seconds 4.9
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) 10:23
Average session length (minutes:seconds) 16:38
Longest session recorded (minutes:seconds) 591:01
Average number of searches completed per session 2.9
Retrievals per search - median 8.0
Retrievals per search - average 1375.6
Retrievals per search - standard deviation 19259
Percent of searches completed with 0 results 24.2%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 70.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,045 30.9%
DISPLAY (excluding automatic displays) 3,495 35.5%
BROWSE 4 0.0%
HELP 76 0.8%
EXPLAIN 103 1.0%
SET/RESET 643 6.5%
SHOW 29 0.3%
ADD ON (AND, OR, AND NOT) 497 5.0%
LOGON or LOGOFF 1,205 12.2%
COMMENT 0 0.0%
SAVE 423 4.3%
USE 5 0.1%
OTHER 324 3.3%
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 1,176 34.7% 244 20.7% 25 199.8 907.9
TITLE WORD 547 16.1% 228 41.7% 6 144.2 752.6
EXACT TITLE 32 0.9% 21 65.6% 1 6.5 16.7
KEYWORD 1,176 34.7% 204 17.3% 32 1702.6 22356.6
JOURNAL 138 4.1% 57 41.3% 163 1879.8 5233.4
EXACT JOURNAL 49 1.4% 18 36.7% 86 981.5 2272.5
SOURCE 2 0.1% 2 100% 0 0.0 0.0
CONFERENCE 3 0.1% 2 66.7% 1,728 1728.0 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 0 0.0% 0 0.0% 0 0.0 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 1 0.0% 0 0.0% 1 1.0 0.0
DATE 11 0.3% 1 9.1% 52 188.1 276.7
LANGUAGE 1 0.0% 0 0.0% 3,647 3647.0 0.0
ADDED 2 0.1% 2 100% 0 0.0 0.0
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 2 0.1% 0 0.0% 35 34.5 12.0
ACCESSION NO. 0 0.0% 0 0.0% 0 0.0 0.0
ISSN 1 0.0% 1 100% 0 0.0 0.0
ISBN 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 85 2.5% 12 14.1% 11 269.5 1837.2
EXACT PE 19 0.6% 4 21.1% 11 46.9 134.6
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 148 4.4% 17 11.5% 61 20701.4 76435.4
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 362 12.0% 96 26.5% 8 190.4 615.5
Single 2,655 88.0% 614 23.1% 31 2306.8 25211.2
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 4 100% 1 25.0% 1 4.0 5.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 87.3%
LONG 2.1%
TAGS 0.2%
FIELDS 2.8%
BROWSE REVIEW 0.1%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 3.4%
COMMENTS 0.0%
Other 1.7%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 38.1%
2. First word of command is invalid 25.3%
3. FIND command with invalid index name 8.6%
4. DISPLAY command contains invalid word 2.3%
5. DISPLAY command-record numbers too large 2.2%
6. DATE search with unrecognized word 2.1%
7. PS command - no previous screen 1.8%
8. Search term missing from search command 1.8%
9. Max. # of ports to a Z39 db are in use 1.8%
10. DISPLAY command - no FIND results 1.5%
11. All others 14.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.2%
2. INDEXES 9.7%
3. BIOSIS DATABASE 8.7%
4. FIND 8.7%
5. COMMANDS 5.8%
6. ADDON SEARCH 4.9%
7. DATABASES 3.9%
8. Unrecognized term 2.9%
9. SAVE 2.9%
10. BOOLEAN OPERATORS 1.9%
11. All others 25.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.5%
2. First word of command is invalid 9.5%
3. FIND command retrieves >1 book 8.4%
4. FIND command with zero results 7.8%
5. FIND command with invalid index name 7.3%
6. DISPLAY command-first of >1 screen 6.7%
7. 3 HELP commands issued from same code 4.5%
8. DISPLAY command - middle of >1 screen 2.8%
9. DISPLAY command - last of >1 screen 2.8%
10. F/BR with index invalid in current DB 2.8%
11. All others 19.0%
Ten most frequent SHOW requests:
1. HISTORY 71.4%
2. MAIL STATUS 25.0%
3. SEARCH 3.6%
11. All others 0.0%
BIOmm/dd bio MELVYL BIOSIS DATABASES TELNET STATISTICS (weekly)