MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 11/01/00 through 11/30/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 990 1,476 2,466
Davis 771 83 854
Irvine 190 0 190
Los Angeles 151 216 367
Riverside 104 122 226
San Diego 98 293 391
San Francisco 214 0 214
Santa Barbara 55 110 165
Santa Cruz 169 210 379
Lawrence Berkeley 0 71 71
Lawrence Livermore 0 37 37
Los Alamos 0 0 0
Other - UC 20 139 159
Other-Network UC n/a 1,741 1,741
_______ ______ _____
2,762 4,498 7,260
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 6,516 20,938 198,822
BIO88 744 1,616 11,873
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 73 288 2,958
2-4 a.m. 64 232 980
4-6 a.m. 41 145 1,149
6-8 a.m. 162 489 4,201
8-10 a.m. 749 2,003 15,962
10-12 a.m. 1,368 3,776 36,432
12-2 p.m. 1,285 3,963 38,646
2-4 p.m. 1,550 5,336 46,273
4-6 p.m. 1,104 3,462 33,201
6-8 p.m. 454 1,481 15,200
8-10 p.m. 267 892 11,390
10-12 p.m. 143 487 4,303
__________ __________ __________ _________________
Total: 7,260 22,554 210,695
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 3,630 5,721 9,351
Davis 2,833 309 3,142
Irvine 522 0 522
Los Angeles 437 610 1,047
Riverside 317 286 603
San Diego 262 1,021 1,283
San Francisco 641 0 641
Santa Barbara 165 331 496
Santa Cruz 664 552 1,216
Lawrence Berkeley 0 217 217
Lawrence Livermore 0 81 81
Los Alamos 0 0 0
Other - UC 21 311 332
Other-Network UC n/a 3,623 3,623
_______ ______ _____
9,492 13,062 22,554
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 37,418 58,260 95,678
Davis 23,274 2,298 25,572
Irvine 6,694 0 6,694
Los Angeles 5,004 4,644 9,648
Riverside 3,691 2,419 6,110
San Diego 1,346 11,561 12,907
San Francisco 4,302 0 4,302
Santa Barbara 1,269 3,412 4,681
Santa Cruz 4,332 4,947 9,279
Lawrence Berkeley 0 1,709 1,709
Lawrence Livermore 0 1,043 1,043
Los Alamos 0 0 0
Other - UC 36 3,051 3,087
Other-Network UC n/a 29,985 29,985
_______ ______ _____
87,366 123,329 210,695
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 5.1
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) 8:38
Average session length (minutes:seconds) 14:04
Longest session recorded (minutes:seconds) 590:10
Average number of searches completed per session 3.1
Retrievals per search - median 10.0
Retrievals per search - average 1139.2
Retrievals per search - standard deviation 12952
Percent of searches completed with 0 results 22.7%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 62.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 19,858 30.4%
DISPLAY (excluding automatic displays) 24,129 36.9%
BROWSE 5 0.0%
HELP 1,172 1.8%
EXPLAIN 1,099 1.7%
SET/RESET 3,260 5.0%
SHOW 198 0.3%
ADD ON (AND, OR, AND NOT) 2,696 4.1%
LOGON or LOGOFF 8,523 13.0%
COMMENT 0 0.0%
SAVE 2,040 3.1%
USE 8 0.0%
OTHER 2,371 3.6%
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 6,594 30.1% 1,321 20.0% 19 154.2 803.6
TITLE WORD 3,593 16.4% 1,371 38.2% 10 540.5 4359.3
EXACT TITLE 120 0.5% 59 49.2% 3 46.8 116.5
KEYWORD 8,393 38.3% 1,377 16.4% 35 2116.4 16703.0
JOURNAL 996 4.5% 422 42.4% 401 6953.1 28026.1
EXACT JOURNAL 326 1.5% 134 41.1% 930 2980.8 4204.4
SOURCE 16 0.1% 9 56.3% 34 37.4 29.9
CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
BIOSYS NAMES 2 0.0% 0 0.0% 1,183 1182.5 170.4
BIOSYS CODES 1 0.0% 0 0.0% 54 54.0 0.0
SUPERTAXA 10 0.0% 0 0.0% 12 502.4 1053.9
MAJ CONCEPT CDES 7 0.0% 3 42.9% 76,036 60005.0 32062.0
CONCEPT CODES 11 0.1% 1 9.1% 35 15088.3 26857.4
PUBLICATION TYPE 2 0.0% 0 0.0% 47 46.5 55.9
DATE 46 0.2% 9 19.6% 6 71.0 268.9
LANGUAGE 17 0.1% 2 11.8% 88 171.1 190.8
ADDED 3 0.0% 1 33.3% 26 26.0 19.8
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 185 0.8% 10 5.4% 23 96.4 304.4
ACCESSION NO. 1 0.0% 1 100% 0 0.0 0.0
ISSN 15 0.1% 7 46.7% 218 612.4 816.7
ISBN 1 0.0% 1 100% 0 0.0 0.0
PERIODICAL 847 3.9% 198 23.4% 5 228.5 2087.4
EXACT PE 141 0.6% 21 14.9% 2 38.9 163.5
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 588 2.7% 92 15.6% 24 6303.5 46760.3
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 2,091 10.6% 572 27.4% 6 899.7 23608.8
Single 17,603 89.4% 3,872 22.0% 32 1631.2 11818.7
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 5 100% 4 80.0% 6 6.0 0.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 85.2%
LONG 1.2%
TAGS 0.2%
FIELDS 2.1%
BROWSE REVIEW 0.0%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 5.6%
COMMENTS 0.0%
Other 2.4%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. NS command - no next screen 30.5%
2. First word of command is invalid 29.6%
3. FIND command with invalid index name 10.6%
4. PS command - no previous screen 4.8%
5. DISPLAY command contains invalid word 3.7%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 2.1%
8. Max. # of ports to a Z39 db are in use 1.4%
9. DATE search with unrecognized word 1.4%
10. NS of SHOW/EXP command-no next screen 1.2%
11. All others 12.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 23.8%
2. GUIDE 16.5%
3. FIND 9.6%
4. COMMANDS 7.6%
5. INDEXES 5.9%
6. Unrecognized term 4.9%
7. BIOSIS DATABASE 4.3%
8. MAIL 3.2%
9. ADDON SEARCH 3.1%
10. B925 1.9%
11. All others 19.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.0%
2. First word of command is invalid 15.9%
3. FIND command with invalid index name 10.4%
4. DISPLAY command-first of >1 screen 8.6%
5. DISPLAY command - middle of >1 screen 5.0%
6. FIND command with zero results 4.8%
7. FIND command retrieves >1 book 3.6%
8. DISPLAY command-complete in one screen 3.3%
9. DISPLAY command - last of >1 screen 3.3%
10. NS command - no next screen 2.3%
11. All others 20.7%
Ten most frequent SHOW requests:
1. HISTORY 48.6%
2. SEARCH 24.6%
3. BIOSIS NEWS 6.6%
4. GLOSSARY 4.4%
5. MAIL STATUS 4.4%
6. SETTINGS 2.7%
7. B902 1.6%
8. SYSTEM NEWS 1.1%
9. SUPERTAXA SETTING 0.5%
10. SUPERTAXA HIERARCHICAL TABLE 0.5%
11. All others 4.9%
BIOmm/dd bio MELVYL BIOSIS DATABASES TELNET STATISTICS (weekly)