MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 05/01/99 through 05/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,585 2,623 4,208
Davis 2,449 287 2,736
Irvine 1,069 0 1,069
Los Angeles 571 661 1,232
Riverside 619 410 1,029
San Diego 102 598 700
San Francisco 467 9 476
Santa Barbara 806 383 1,189
Santa Cruz 1,103 434 1,537
Lawrence Berkeley 0 51 51
Lawrence Livermore 0 74 74
Los Alamos 0 0 0
Other - UC 19 264 283
Other-Network UC n/a 1,937 1,937
_______ ______ _____
8,790 7,731 16,521
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 15,220 55,467 534,832
BIO88 1,301 3,388 24,586
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 217 836 9,215
2-4 a.m. 109 469 3,230
4-6 a.m. 111 372 5,651
6-8 a.m. 262 747 7,621
8-10 a.m. 1,353 3,942 33,733
10-12 a.m. 2,671 8,822 83,461
12-2 p.m. 2,955 9,857 94,176
2-4 p.m. 3,547 12,869 117,343
4-6 p.m. 2,605 9,725 96,610
6-8 p.m. 1,244 5,286 47,111
8-10 p.m. 894 3,782 35,770
10-12 p.m. 553 2,148 25,497
__________ __________ __________ _________________
Total: 16,521 58,855 559,418
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 6,417 8,740 15,157
Davis 8,104 1,068 9,172
Irvine 4,845 0 4,845
Los Angeles 2,176 2,323 4,499
Riverside 2,198 1,394 3,592
San Diego 315 1,774 2,089
San Francisco 1,411 28 1,439
Santa Barbara 4,366 1,273 5,639
Santa Cruz 4,784 1,521 6,305
Lawrence Berkeley 0 110 110
Lawrence Livermore 0 215 215
Los Alamos 0 0 0
Other - UC 59 639 698
Other-Network UC n/a 5,095 5,095
_______ ______ _____
34,675 24,180 58,855
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 63,161 87,822 150,983
Davis 77,170 6,063 83,233
Irvine 40,570 0 40,570
Los Angeles 27,413 29,872 57,285
Riverside 16,638 13,975 30,613
San Diego 1,017 18,613 19,630
San Francisco 9,943 164 10,107
Santa Barbara 43,375 15,730 59,105
Santa Cruz 31,120 13,493 44,613
Lawrence Berkeley 0 1,253 1,253
Lawrence Livermore 0 1,802 1,802
Los Alamos 0 0 0
Other - UC 275 8,513 8,788
Other-Network UC n/a 51,436 51,436
_______ ______ _____
310,682 248,736 559,418
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 5.4
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
_________________________________________
Median session length (minutes:seconds) 9:33
Average session length (minutes:seconds) 13:53
Longest session recorded (minutes:seconds) 402:56
Average number of searches completed per session 3.5
Retrievals per search - median 10.0
Retrievals per search - average 864.2
Retrievals per search - standard deviation 9935.9
Percent of searches completed with 0 results 23.3%
Percent of searches entered that are long 0.7%
Percent of long searches completed
(includes partial results) 45.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 52,922 30.1%
DISPLAY (excluding automatic displays) 70,066 39.9%
BROWSE 23 0.0%
HELP 3,008 1.7%
EXPLAIN 2,917 1.7%
SET/RESET 6,015 3.4%
SHOW 674 0.4%
ADD ON (AND, OR, AND NOT) 5,933 3.4%
LOGON or LOGOFF 21,894 12.5%
COMMENT 4 0.0%
SAVE 4,872 2.8%
USE 109 0.1%
OTHER 7,149 4.1%
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 14,592 25.7% 2,909 19.9% 19 155.9 643.7
TITLE WORD 7,785 13.7% 2,891 37.1% 12 667.5 6245.5
EXACT TITLE 534 0.9% 345 64.6% 2 124.5 500.4
KEYWORD 26,778 47.2% 5,100 19.0% 33 1624.1 15270.0
JOURNAL 2,075 3.7% 814 39.2% 520 4288.5 11807.6
EXACT JOURNAL 814 1.4% 309 38.0% 669 2346.0 4840.1
SOURCE 45 0.1% 31 68.9% 78 1965.0 4984.7
CONFERENCE 49 0.1% 12 24.5% 113 2784.2 6690.3
BIOSYS NAMES 7 0.0% 6 85.7% 1,112 1112.0 0.0
BIOSYS CODES 21 0.0% 2 9.5% 50 4311.5 13059.4
SUPERTAXA 141 0.2% 26 18.4% 29 156.7 517.8
MAJ CONCEPT CDES 8 0.0% 1 12.5% 45 1270.3 3209.7
CONCEPT CODES 65 0.1% 9 13.8% 230 16879.6 26043.0
PUBLICATION TYPE 268 0.5% 42 15.7% 23 382.1 1786.2
DATE 904 1.6% 178 19.7% 10 154.8 741.1
LANGUAGE 97 0.2% 10 10.3% 58 304.0 1298.8
ADDED 3 0.0% 1 33.3% 12 12.0 9.9
ARTICLE 1 0.0% 0 0.0% 1,403 1403.0 0.0
AUTHOR AFFIL. 231 0.4% 47 20.3% 39 1143.2 4220.3
ACCESSION NO. 10 0.0% 9 90.0% 1 1.0 0.0
ISSN 6 0.0% 2 33.3% 2,107 1941.0 1203.5
ISBN 4 0.0% 1 25.0% 144 141.0 5.2
PERIODICAL 1,817 3.2% 437 24.0% 7 373.9 2335.1
EXACT PE 317 0.6% 67 21.1% 4 27.9 101.6
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 2 0.0% 0 0.0% 4,066 4066.0 0.0
Other indexes 128 0.2% 36 28.1% 26 159.6 468.0
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 3,915 7.5% 1,165 29.8% 7 236.3 2549.3
Single 48,608 92.5% 10,877 22.4% 30 1266.6 12071.9
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 23 100% 10 43.5% 2 4.5 4.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 88.3%
LONG 1.3%
TAGS 0.3%
FIELDS 1.1%
BROWSE REVIEW 0.0%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 3.3%
COMMENTS 0.0%
Other 3.8%
2.2 Error, EXPLAIN and HELP statistics
_______________________________________
Percent of commands that contained errors 11.8%
Ten most frequent errors:
1. NS command - no next screen 33.5%
2. First word of command is invalid 30.9%
3. FIND command with invalid index name 9.5%
4. PS command - no previous screen 4.5%
5. DISPLAY command contains invalid word 3.6%
6. Valid command at an inappropriate time 2.1%
7. Search term missing from search command 1.7%
8. DISPLAY command-record numbers too large 1.3%
9. Command contains escape or arrow key 1.1%
10. Index invalid in current database 1.1%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 24.5%
2. GUIDE 19.1%
3. FIND 8.2%
4. COMMANDS 6.7%
5. INDEXES 5.8%
6. Unrecognized term 5.6%
7. ADDON SEARCH 3.3%
8. BIOSIS DATABASE 2.7%
9. DISPLAY 2.7%
10. MAIL 1.9%
11. All others 19.6%
Ten most frequent HELP situations:
1. Help requested from SET DB command 20.7%
2. First word of command is invalid 14.5%
3. FIND command with invalid index name 8.5%
4. DISPLAY command-first of >1 screen 8.1%
5. DISPLAY command - middle of >1 screen 6.3%
6. FIND command with zero results 5.0%
7. FIND command retrieves >1 book 4.9%
8. DISPLAY command - last of >1 screen 3.9%
9. DISPLAY command-complete in one screen 3.8%
10. NS command - no next screen 3.4%
11. All others 20.8%
Ten most frequent SHOW requests:
1. HISTORY 40.7%
2. SEARCH 36.1%
3. GLOSSARY 4.0%
4. SYSTEM1 NEWS 3.7%
5. MAIL STATUS 3.3%
6. SYSTEM NEWS 2.2%
7. SETTINGS 2.0%
8. BIOSIS NEWS 1.2%
9. MAIL SETTINGS 1.1%
10. SUPERTAXA HIERARCHICAL TABLE 0.6%
11. All others 5.1%