MELVYL BIOSIS DATABASES TELNET STATISTICS
Time period: 02/01/99 through 02/28/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,873 3,959 6,832
Davis 2,924 305 3,229
Irvine 1,390 0 1,390
Los Angeles 643 805 1,448
Riverside 627 491 1,118
San Diego 122 1,215 1,337
San Francisco 483 20 503
Santa Barbara 630 543 1,173
Santa Cruz 1,035 522 1,557
Lawrence Berkeley 0 53 53
Lawrence Livermore 0 56 56
Los Alamos 0 0 0
Other - UC 10 407 417
Other-Network UC n/a 2,008 2,008
_______ ______ _____
10,737 10,384 21,121
Relative use of BIOSIS databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
BIOSIS 19,467 70,617 705,940
BIO88 1,654 4,487 46,308
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 226 872 8,337
2-4 a.m. 116 381 4,261
4-6 a.m. 105 389 8,558
6-8 a.m. 341 1,106 9,260
8-10 a.m. 1,992 6,291 57,622
10-12 a.m. 3,824 13,015 138,810
12-2 p.m. 3,882 14,058 133,876
2-4 p.m. 4,450 15,914 150,766
4-6 p.m. 3,185 11,161 112,449
6-8 p.m. 1,376 5,267 50,550
8-10 p.m. 1,025 4,340 49,515
10-12 p.m. 599 2,310 28,244
__________ __________ __________ _________________
Total: 21,121 75,104 752,248
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 11,569 13,933 25,502
Davis 10,675 1,100 11,775
Irvine 5,830 0 5,830
Los Angeles 2,467 2,832 5,299
Riverside 2,380 1,530 3,910
San Diego 379 2,359 2,738
San Francisco 1,468 109 1,577
Santa Barbara 2,906 1,842 4,748
Santa Cruz 3,988 1,793 5,781
Lawrence Berkeley 0 178 178
Lawrence Livermore 0 108 108
Los Alamos 0 0 0
Other - UC 35 935 970
Other-Network UC n/a 6,688 6,688
_______ ______ _____
41,697 33,407 75,104
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 107,282 162,480 269,762
Davis 98,359 8,751 107,110
Irvine 55,164 0 55,164
Los Angeles 25,253 39,369 64,622
Riverside 16,582 20,804 37,386
San Diego 1,980 18,844 20,824
San Francisco 12,799 7,995 20,794
Santa Barbara 27,083 21,822 48,905
Santa Cruz 25,961 17,075 43,036
Lawrence Berkeley 0 2,711 2,711
Lawrence Livermore 0 1,240 1,240
Los Alamos 0 0 0
Other - UC 1,666 4,775 6,441
Other-Network UC n/a 74,253 74,253
_______ ______ _____
372,129 380,119 752,248
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 7.2
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) 8:10
Average session length (minutes:seconds) 13:28
Longest session recorded (minutes:seconds) 1142
Average number of searches completed per session 3.5
Retrievals per search - median 12.0
Retrievals per search - average 983.3
Retrievals per search - standard deviation 9361.7
Percent of searches completed with 0 results 22.1%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 35.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 67,576 29.8%
DISPLAY (excluding automatic displays) 88,476 39.1%
BROWSE 40 0.0%
HELP 4,631 2.0%
EXPLAIN 4,275 1.9%
SET/RESET 7,887 3.5%
SHOW 929 0.4%
ADD ON (AND, OR, AND NOT) 7,528 3.3%
LOGON or LOGOFF 28,503 12.6%
COMMENT 6 0.0%
SAVE 6,694 3.0%
USE 138 0.1%
OTHER 9,912 4.4%
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 18,489 25.4% 3,531 19.1% 19 141.7 585.6
TITLE WORD 9,949 13.6% 3,347 33.6% 13 612.2 4177.9
EXACT TITLE 660 0.9% 444 67.3% 2 162.9 763.4
KEYWORD 34,742 47.7% 6,373 18.3% 41 1853.1 14345.0
JOURNAL 2,638 3.6% 931 35.3% 609 4887.3 13693.8
EXACT JOURNAL 1,053 1.4% 432 41.0% 641 2743.4 5160.4
SOURCE 48 0.1% 34 70.8% 42 127.1 190.7
CONFERENCE 4 0.0% 2 50.0% 5,493 5492.5 7539.9
BIOSYS NAMES 39 0.1% 33 84.6% 171 3206.3 4833.5
BIOSYS CODES 74 0.1% 10 13.5% 80 2052.0 6808.9
SUPERTAXA 193 0.3% 40 20.7% 14 690.2 4488.9
MAJ CONCEPT CDES 30 0.0% 0 0.0% 88 963.0 3827.3
CONCEPT CODES 120 0.2% 6 5.0% 380 13191.1 33478.0
PUBLICATION TYPE 731 1.0% 91 12.4% 35 396.8 1763.9
DATE 1,123 1.5% 192 17.1% 16 349.6 2183.7
LANGUAGE 331 0.5% 71 21.4% 19 272.5 878.9
ADDED 9 0.0% 2 22.2% 15 22.1 19.2
ARTICLE 5 0.0% 1 20.0% 11,614 22867.3 31705.7
AUTHOR AFFIL. 147 0.2% 32 21.8% 26 1060.7 3031.1
ACCESSION NO. 7 0.0% 7 100% 0 0.0 0.0
ISSN 1 0.0% 1 100% 0 0.0 0.0
ISBN 13 0.0% 4 30.8% 16 22.2 15.6
PERIODICAL 1,944 2.7% 452 23.3% 6 421.0 2347.6
EXACT PE 352 0.5% 69 19.6% 4 87.5 296.6
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% 1 50.0% 1,768 1768.0 0.0
Other indexes 189 0.3% 52 27.5% 145 1168.7 4215.3
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 5,398 8.0% 1,422 26.3% 9 392.9 4086.1
Single 61,706 92.0% 13,216 21.4% 33 1426.1 11475.4
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 40 100% 20 50.0% 1 5.1 7.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.5%
SHORT 89.0%
LONG 1.5%
TAGS 0.5%
FIELDS 1.3%
BROWSE REVIEW 0.0%
BROWSE SHORT 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.8%
COMMENTS 0.0%
Other 3.3%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 12.3%
Ten most frequent errors:
1. First word of command is invalid 33.0%
2. NS command - no next screen 29.4%
3. FIND command with invalid index name 10.2%
4. PS command - no previous screen 5.3%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 1.7%
8. DATE search with unrecognized word 1.0%
9. NS of SHOW/EXP command-no next screen 1.0%
10. Command contains escape or arrow key 1.0%
11. All others 11.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (BIO DB) 27.3%
2. GUIDE 16.6%
3. FIND 9.3%
4. COMMANDS 6.7%
5. INDEXES 5.5%
6. Unrecognized term 5.1%
7. DISPLAY 3.1%
8. ADDON SEARCH 2.8%
9. BIOSIS DATABASE 2.3%
10. MAIL 2.2%
11. All others 19.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 18.8%
2. First word of command is invalid 15.7%
3. FIND command with invalid index name 8.9%
4. DISPLAY command-first of >1 screen 8.4%
5. DISPLAY command - middle of >1 screen 6.0%
6. DISPLAY command-complete in one screen 5.0%
7. FIND command with zero results 4.8%
8. FIND command retrieves >1 book 4.4%
9. DISPLAY command - last of >1 screen 3.6%
10. NS command - no next screen 2.8%
11. All others 21.4%
Ten most frequent SHOW requests:
1. HISTORY 36.1%
2. SEARCH 33.3%
3. MAIL STATUS 8.6%
4. GLOSSARY 3.9%
5. BIOSIS NEWS 3.7%
6. SETTINGS 2.7%
7. DLA NEWS 2.3%
8. MAIL SETTINGS 1.8%
9. DLA1 NEWS 1.3%
10. TIME 0.8%
11. All others 5.5%