MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 09/01/99 through 09/30/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,762 2,843 4,605
Davis 1,343 115 1,458
Irvine 336 0 336
Los Angeles 290 269 559
Riverside 250 296 546
San Diego 252 308 560
San Francisco 400 2 402
Santa Barbara 208 372 580
Santa Cruz 330 278 608
Lawrence Berkeley 0 30 30
Lawrence Livermore 0 35 35
Los Alamos 0 0 0
Other - UC 136 378 514
Other-Network UC n/a 1,489 1,489
_______ ______ _____
5,307 6,415 11,722
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 10,534 34,060 345,887
BIO88 1,188 2,863 40,322
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 170 634 7,240
2-4 a.m. 56 177 2,530
4-6 a.m. 61 253 1,629
6-8 a.m. 165 617 9,395
8-10 a.m. 1,222 3,561 29,022
10-12 a.m. 2,223 6,461 69,100
12-2 p.m. 2,217 7,243 92,275
2-4 p.m. 2,532 7,675 73,629
4-6 p.m. 1,661 5,123 51,192
6-8 p.m. 741 2,741 28,660
8-10 p.m. 399 1,419 12,901
10-12 p.m. 275 1,019 8,636
__________ __________ __________ _________________
Total: 11,722 36,923 386,209
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 6,156 9,377 15,533
Davis 4,730 355 5,085
Irvine 952 0 952
Los Angeles 956 817 1,773
Riverside 594 747 1,341
San Diego 629 1,013 1,642
San Francisco 1,198 2 1,200
Santa Barbara 715 1,241 1,956
Santa Cruz 1,501 886 2,387
Lawrence Berkeley 0 121 121
Lawrence Livermore 0 90 90
Los Alamos 0 0 0
Other - UC 120 897 1,017
Other-Network UC n/a 3,826 3,826
_______ ______ _____
17,551 19,372 36,923
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 49,878 145,238 195,116
Davis 47,451 2,327 49,778
Irvine 7,841 0 7,841
Los Angeles 10,099 7,507 17,606
Riverside 4,374 7,150 11,524
San Diego 3,024 10,934 13,958
San Francisco 7,203 0 7,203
Santa Barbara 5,667 11,901 17,568
Santa Cruz 7,539 8,097 15,636
Lawrence Berkeley 0 753 753
Lawrence Livermore 0 1,187 1,187
Los Alamos 0 0 0
Other - UC 883 10,670 11,553
Other-Network UC n/a 36,486 36,486
_______ ______ _____
143,959 242,250 386,209
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.6
Standard deviation in seconds 6.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 BIOSIS Databases Detailed Statistics
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Median session length (minutes:seconds) 7:40
Average session length (minutes:seconds) 12:57
Longest session recorded (minutes:seconds) 590:38
Average number of searches completed per session 3.1
Retrievals per search - median 12.0
Retrievals per search - average 811.9
Retrievals per search - standard deviation 8791.8
Percent of searches completed with 0 results 21.7%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 43.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 32,861 29.3%
DISPLAY (excluding automatic displays) 42,058 37.5%
BROWSE 34 0.0%
HELP 2,226 2.0%
EXPLAIN 2,399 2.1%
SET/RESET 4,846 4.3%
SHOW 457 0.4%
ADD ON (AND, OR, AND NOT) 4,062 3.6%
LOGON or LOGOFF 14,583 13.0%
COMMENT 7 0.0%
SAVE 4,019 3.6%
USE 21 0.0%
OTHER 4,530 4.0%
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 11,320 31.7% 2,065 18.2% 21 120.0 446.4
TITLE WORD 4,948 13.8% 1,606 32.5% 11 418.8 3281.8
EXACT TITLE 270 0.8% 148 54.8% 1 39.4 123.2
KEYWORD 14,241 39.8% 2,441 17.1% 41 1698.5 13318.7
JOURNAL 1,572 4.4% 708 45.0% 371 4538.6 13958.0
EXACT JOURNAL 578 1.6% 287 49.7% 646 2258.2 4668.6
SOURCE 35 0.1% 27 77.1% 66 122.9 178.0
CONFERENCE 4 0.0% 2 50.0% 83 82.5 74.2
BIOSYS NAMES 7 0.0% 6 85.7% 3,072 3072.0 0.0
BIOSYS CODES 14 0.0% 0 0.0% 416 6083.7 17277.5
SUPERTAXA 66 0.2% 3 4.5% 33 624.4 2527.3
MAJ CONCEPT CDES 2 0.0% 0 0.0% 122 122.0 72.1
CONCEPT CODES 30 0.1% 1 3.3% 521 7868.3 15851.0
PUBLICATION TYPE 341 1.0% 33 9.7% 14 339.3 2963.1
DATE 729 2.0% 129 17.7% 10 151.4 965.9
LANGUAGE 27 0.1% 0 0.0% 39 728.6 1790.9
ADDED 3 0.0% 2 66.7% 28 28.0 0.0
ARTICLE 6 0.0% 0 0.0% 446 582.8 484.1
AUTHOR AFFIL. 179 0.5% 20 11.2% 21 866.6 2892.4
ACCESSION NO. 9 0.0% 9 100% 0 0.0 0.0
ISSN 7 0.0% 3 42.9% 176 1947.0 3625.8
ISBN 1 0.0% 1 100% 0 0.0 0.0
PERIODICAL 1,035 2.9% 242 23.4% 5 237.5 1788.6
EXACT PE 200 0.6% 40 20.0% 4 92.2 384.3
RPE 1 0.0% 0 0.0% 16 16.0 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 117 0.3% 35 29.9% 147 4000.7 11223.0
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 2,991 9.2% 764 25.5% 7 231.6 2171.6
Single 29,592 90.8% 6,231 21.1% 32 1170.4 10005.8
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 34 100% 11 32.4% 7 11.7 9.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 89.1%
LONG 1.9%
TAGS 0.4%
FIELDS 1.6%
BROWSE REVIEW 0.1%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 3.0%
COMMENTS 0.0%
Other 2.2%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 11.8%
Ten most frequent errors:
1. First word of command is invalid 30.3%
2. NS command - no next screen 29.3%
3. FIND command with invalid index name 9.7%
4. PS command - no previous screen 4.6%
5. DISPLAY command contains invalid word 3.9%
6. Valid command at an inappropriate time 2.0%
7. Search term missing from search command 1.9%
8. Index invalid in current database 1.2%
9. NS of SHOW/EXP command-no next screen 1.2%
10. DISPLAY command - no FIND results 0.9%
11. All others 15.1%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 23.3%
2. GUIDE 13.0%
3. FIND 8.1%
4. COMMANDS 6.6%
5. INDEXES 6.5%
6. Unrecognized term 6.3%
7. BIOSIS DATABASE 3.7%
8. DISPLAY 2.9%
9. ADDON SEARCH 2.8%
10. MAIL 2.3%
11. All others 24.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 20.2%
2. First word of command is invalid 14.5%
3. DISPLAY command-first of >1 screen 9.2%
4. FIND command with invalid index name 7.5%
5. FIND command retrieves >1 book 4.9%
6. DISPLAY command - middle of >1 screen 4.6%
7. DISPLAY command-complete in one screen 4.5%
8. FIND command with zero results 3.7%
9. DISPLAY command - last of >1 screen 3.5%
10. MELVYL system could not process command 2.8%
11. All others 24.7%
Ten most frequent SHOW requests:
1. HISTORY 44.3%
2. SEARCH 23.5%
3. BIOSIS NEWS 4.5%
4. SETTINGS 4.1%
5. GLOSSARY 4.1%
6. MAIL STATUS 3.4%
7. TAXONOMIC GUIDE 1.4%
8. UPDATE 1.4%
9. SUPERTAXA HIERARCHICAL TABLE 1.1%
10. IAC NEWS 0.9%
11. All others 11.3%