MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 07/01/99 through 07/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,143 1,939 3,082
Davis 1,420 131 1,551
Irvine 389 0 389
Los Angeles 326 356 682
Riverside 202 463 665
San Diego 137 259 396
San Francisco 424 2 426
Santa Barbara 248 296 544
Santa Cruz 365 309 674
Lawrence Berkeley 0 30 30
Lawrence Livermore 0 23 23
Los Alamos 0 0 0
Other - UC 28 195 223
Other-Network UC n/a 1,479 1,479
_______ ______ _____
4,682 5,482 10,164
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 9,128 31,079 300,403
BIO88 1,036 2,889 24,379
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 110 484 4,553
2-4 a.m. 55 208 1,818
4-6 a.m. 64 222 2,980
6-8 a.m. 219 556 10,619
8-10 a.m. 997 2,786 24,120
10-12 a.m. 2,058 7,079 60,932
12-2 p.m. 1,772 5,779 70,982
2-4 p.m. 2,297 7,903 64,105
4-6 p.m. 1,648 5,591 50,245
6-8 p.m. 464 1,650 16,459
8-10 p.m. 255 841 8,893
10-12 p.m. 225 869 9,076
__________ __________ __________ _________________
Total: 10,164 33,968 324,782
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 5,188 6,735 11,923
Davis 4,900 409 5,309
Irvine 1,449 0 1,449
Los Angeles 1,051 1,159 2,210
Riverside 707 1,284 1,991
San Diego 423 794 1,217
San Francisco 1,153 6 1,159
Santa Barbara 837 1,036 1,873
Santa Cruz 1,340 923 2,263
Lawrence Berkeley 0 84 84
Lawrence Livermore 0 86 86
Los Alamos 0 0 0
Other - UC 68 467 535
Other-Network UC n/a 3,869 3,869
_______ ______ _____
17,116 16,852 33,968
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 44,324 65,627 109,951
Davis 44,854 3,324 48,178
Irvine 11,413 0 11,413
Los Angeles 9,897 9,873 19,770
Riverside 4,767 13,751 18,518
San Diego 1,870 6,088 7,958
San Francisco 9,312 29 9,341
Santa Barbara 6,854 10,573 17,427
Santa Cruz 8,807 10,384 19,191
Lawrence Berkeley 0 533 533
Lawrence Livermore 0 797 797
Los Alamos 0 0 0
Other - UC 315 4,120 4,435
Other-Network UC n/a 57,270 57,270
_______ ______ _____
142,413 182,369 324,782
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.5
Standard deviation in seconds 6.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 BIOSIS Databases Detailed Statistics
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Median session length (minutes:seconds) 8:26
Average session length (minutes:seconds) 13:41
Longest session recorded (minutes:seconds) 719:55
Average number of searches completed per session 3.3
Retrievals per search - median 11.0
Retrievals per search - average 760.5
Retrievals per search - standard deviation 6864.8
Percent of searches completed with 0 results 22.4%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 44.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 29,857 29.7%
DISPLAY (excluding automatic displays) 38,536 38.4%
BROWSE 11 0.0%
HELP 1,639 1.6%
EXPLAIN 1,764 1.8%
SET/RESET 4,143 4.1%
SHOW 385 0.4%
ADD ON (AND, OR, AND NOT) 4,111 4.1%
LOGON or LOGOFF 12,663 12.6%
COMMENT 0 0.0%
SAVE 3,324 3.3%
USE 54 0.1%
OTHER 3,955 3.9%
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 10,332 32.1% 1,951 18.9% 20 142.1 570.3
TITLE WORD 4,571 14.2% 1,596 34.9% 11 618.3 7518.1
EXACT TITLE 262 0.8% 158 60.3% 1 293.2 1830.4
KEYWORD 13,087 40.7% 2,218 16.9% 41 1513.7 9466.7
JOURNAL 1,114 3.5% 446 40.0% 525 4675.2 14962.8
EXACT JOURNAL 509 1.6% 198 38.9% 744 2497.6 4867.8
SOURCE 46 0.1% 35 76.1% 80 5827.5 13326.1
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 9 0.0% 4 44.4% 1,249 1806.4 1944.5
SUPERTAXA 38 0.1% 7 18.4% 26 184.7 354.4
MAJ CONCEPT CDES 6 0.0% 0 0.0% 33 142.7 291.7
CONCEPT CODES 45 0.1% 3 6.7% 38 4739.2 21520.4
PUBLICATION TYPE 257 0.8% 24 9.3% 20 316.0 1555.4
DATE 615 1.9% 97 15.8% 11 200.5 1160.1
LANGUAGE 12 0.0% 3 25.0% 160 1636.0 3855.2
ADDED 5 0.0% 3 60.0% 20 19.5 16.3
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 163 0.5% 32 19.6% 24 4908.1 31244.7
ACCESSION NO. 21 0.1% 12 57.1% 1 1.0 0.0
ISSN 4 0.0% 3 75.0% 1,967 1967.0 0.0
ISBN 6 0.0% 5 83.3% 51 51.0 0.0
PERIODICAL 872 2.7% 246 28.2% 6 288.7 3232.3
EXACT PE 159 0.5% 46 28.9% 3 65.9 232.2
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 53 0.2% 14 26.4% 30 632.1 1967.9
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 2,449 8.3% 629 25.7% 7 260.1 3899.7
Single 27,177 91.7% 5,816 21.4% 31 1112.8 8161.6
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 11 100% 5 45.5% 1 3.0 3.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 89.0%
LONG 2.4%
TAGS 0.2%
FIELDS 1.3%
BROWSE REVIEW 0.0%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.8%
COMMENTS 0.0%
Other 2.3%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 11.1%
Ten most frequent errors:
1. NS command - no next screen 32.7%
2. First word of command is invalid 31.0%
3. FIND command with invalid index name 9.9%
4. PS command - no previous screen 4.4%
5. DISPLAY command contains invalid word 3.5%
6. Valid command at an inappropriate time 1.9%
7. Search term missing from search command 1.7%
8. NS of SHOW/EXP command-no next screen 1.5%
9. DATE search with unrecognized word 1.3%
10. Index invalid in current database 1.2%
11. All others 11.0%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 18.5%
2. GUIDE 16.1%
3. FIND 8.6%
4. COMMANDS 8.3%
5. INDEXES 5.7%
6. Unrecognized term 5.3%
7. DISPLAY 4.3%
8. MAIL 3.3%
9. ADDON SEARCH 3.2%
10. BIOSIS DATABASE 2.8%
11. All others 23.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 19.5%
2. First word of command is invalid 15.7%
3. DISPLAY command-first of >1 screen 9.9%
4. FIND command with invalid index name 7.3%
5. FIND command retrieves >1 book 5.1%
6. FIND command with zero results 4.8%
7. DISPLAY command - middle of >1 screen 4.7%
8. DISPLAY command-complete in one screen 4.5%
9. NS command - no next screen 3.0%
10. DISPLAY command - last of >1 screen 3.0%
11. All others 22.4%
Ten most frequent SHOW requests:
1. HISTORY 43.0%
2. SEARCH 28.9%
3. MAIL STATUS 7.8%
4. BIOSIS NEWS 3.5%
5. GLOSSARY 3.2%
6. SETTINGS 2.1%
7. SYSTEM NEWS 2.1%
8. MAIL SETTINGS 2.1%
9. UPDATE 1.3%
10. FIND DISPLAY 0.8%
11. All others 5.1%