MELVYL INSPEC 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 45 2,106 2,151
Davis 222 18 240
Irvine 385 0 385
Los Angeles 101 864 965
Riverside 19 57 76
San Diego 352 826 1,178
San Francisco 73 0 73
Santa Barbara 103 369 472
Santa Cruz 20 152 172
Lawrence Berkeley 0 276 276
Lawrence Livermore 0 174 174
Los Alamos 0 0 0
Other - UC 13 238 251
Other-Network UC n/a 1,424 1,424
_______ ______ _____
1,333 6,504 7,837
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 4,881 12,029 107,471
INS90 1,136 2,174 13,470
INS85 728 1,233 7,119
INS80 578 959 6,274
INS69 514 1,154 8,531
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 176 445 2,760
2-4 a.m. 120 290 2,391
4-6 a.m. 164 371 3,319
6-8 a.m. 234 595 4,748
8-10 a.m. 829 1,590 11,191
10-12 a.m. 1,281 2,705 22,546
12-2 p.m. 1,275 2,929 22,369
2-4 p.m. 1,497 3,406 30,202
4-6 p.m. 1,013 2,382 19,483
6-8 p.m. 563 1,318 11,993
8-10 p.m. 381 818 6,919
10-12 p.m. 304 700 4,944
__________ __________ __________ _________________
Total: 7,837 17,549 142,865
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 108 4,587 4,695
Davis 560 32 592
Irvine 1,240 0 1,240
Los Angeles 198 1,899 2,097
Riverside 43 183 226
San Diego 904 1,985 2,889
San Francisco 165 0 165
Santa Barbara 169 764 933
Santa Cruz 49 312 361
Lawrence Berkeley 0 715 715
Lawrence Livermore 0 358 358
Los Alamos 0 0 0
Other - UC 16 581 597
Other-Network UC n/a 2,681 2,681
_______ ______ _____
3,452 14,097 17,549
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,826 36,865 38,691
Davis 5,348 146 5,494
Irvine 15,204 0 15,204
Los Angeles 6,205 13,393 19,598
Riverside 121 1,151 1,272
San Diego 4,229 13,264 17,493
San Francisco 901 0 901
Santa Barbara 1,823 9,024 10,847
Santa Cruz 176 2,044 2,220
Lawrence Berkeley 0 5,050 5,050
Lawrence Livermore 0 2,271 2,271
Los Alamos 0 0 0
Other - UC 54 4,935 4,989
Other-Network UC n/a 18,835 18,835
_______ ______ _____
35,887 106,978 142,865
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 3.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.1
2.0 INSPEC Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 7:32
Average session length (minutes:seconds) 12:15
Longest session recorded (minutes:seconds) 441:40
Average number of searches completed per session 2.2
Retrievals per search - median 6.0
Retrievals per search - average 433.9
Retrievals per search - standard deviation 8357.5
Percent of searches completed with 0 results 26.8%
Percent of searches entered that are long 5.1%
Percent of long searches completed
(includes partial results) 68.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 16,056 30.5%
DISPLAY (excluding automatic displays) 19,435 36.9%
BROWSE 21 0.0%
SELECT 4 0.0%
HELP 439 0.8%
EXPLAIN 673 1.3%
SET/RESET 4,588 8.7%
SHOW 167 0.3%
ADD ON (AND, OR, AND NOT) 1,491 2.8%
LOGON or LOGOFF 6,851 13.0%
COMMENT 0 0.0%
SAVE 829 1.6%
USE 16 0.0%
OTHER 2,098 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 8,278 47.3% 1,996 24.1% 14 73.4 322.0
TITLE WORD 3,207 18.3% 1,389 43.3% 7 185.1 3450.0
EXACT TITLE 86 0.5% 51 59.3% 2 70.1 201.2
JOURNAL 493 2.8% 164 33.3% 71 1816.4 7101.6
EXACT JOURNAL 107 0.6% 42 39.3% 195 2585.3 10730.9
SUBJECT 564 3.2% 210 37.2% 24 994.0 3226.1
EXACT SUBJECT 28 0.2% 8 28.6% 27 3604.3 6052.7
THESAURUS 5 0.0% 0 0.0% 10,643 8518.6 4753.2
EXACT THESAURUS 38 0.2% 2 5.3% 300 1167.5 1436.6
KEYWORD 3,395 19.4% 614 18.1% 30 1764.5 20081.6
SUBFILE 19 0.1% 1 5.3% 36 392.7 1291.2
FORM 46 0.3% 5 10.9% 91 604.8 1538.4
DATE 335 1.9% 96 28.7% 7 114.0 655.1
ADDED 11 0.1% 6 54.5% 19 15.2 12.9
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 253 1.4% 73 28.9% 19 515.7 1826.7
CONFERENCE 94 0.5% 39 41.5% 282 1906.2 6905.8
LANGUAGE 3 0.0% 0 0.0% 2 37.0 61.5
CHEMICAL NAME 19 0.1% 6 31.6% 14 1293.2 4399.9
ISSN 7 0.0% 5 71.4% 137 137.0 49.5
ISBN 2 0.0% 1 50.0% 37 37.0 0.0
ID NUMBER 2 0.0% 0 0.0% 1 1.0 0.0
PERIODICAL 463 2.6% 98 21.2% 6 50.2 233.2
EXACT PE 44 0.3% 6 13.6% 4 60.6 221.5
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 12 0.1% 2 16.7% 26 26.4 16.8
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 1,657 10.5% 577 34.8% 6 126.6 816.3
Single 14,148 89.5% 3,646 25.8% 18 666.8 10604.6
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:
THESAURUS 21 100% 3 14.3% 2 17.5 33.3
EXACT THESAURUS 0 0.0% 0 0.0% 0 0.0 0.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 83.1%
LONG 2.5%
TAGS 0.1%
FIELDS 6.1%
BROWSE REVIEW 0.1%
BROWSE LONG 0.0%
PERIODICALS 3.9%
COMMENTS 0.0%
Other 1.1%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 41.7%
2. First word of command is invalid 28.3%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 3.0%
5. Max. # of ports to a Z39 db are in use 1.9%
6. Search term missing from search command 1.6%
7. PS command - no previous screen 1.4%
8. 1189 1.4%
9. Valid command at an inappropriate time 1.3%
10. NS of SHOW/EXP command-no next screen 1.3%
11. All others 11.1%
Ten most frequent EXPLAIN requests:
1. INSPEC DATABASES 13.8%
2. FIND (INSPEC DBS) 13.7%
3. INSPEC BACKFILES 9.1%
4. GUIDE (INSPEC DBS) 8.8%
5. LOCATE (INS/PSY DBS) 7.6%
6. INDEXES (INSPEC DBS) 7.3%
7. DATABASES 4.6%
8. COMMANDS (INS/PSY/ABI/BIO DBS) 4.2%
9. MAIL 3.6%
10. 1752 3.3%
11. All others 24.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.4%
2. First word of command is invalid 15.2%
3. FIND command with invalid index name 7.2%
4. DISPLAY command - middle of >1 screen 6.0%
5. FIND command with zero results 4.9%
6. DISPLAY command-first of >1 screen 4.7%
7. NS command - no next screen 4.5%
8. DISPLAY command - last of >1 screen 4.3%
9. FIND command retrieves >1 book 4.0%
10. DISPLAY command-complete in one screen 3.5%
11. All others 21.3%
Ten most frequent SHOW requests:
1. HISTORY 59.6%
2. SEARCH 20.5%
3. MAIL STATUS 5.4%
4. SETTINGS (INS/PSY DBS) 3.0%
5. INSPEC LOADING STATISTICS 3.0%
6. INSPEC NEWS 2.4%
7. PUBLICATION TYPES (INSPEC DBS) 1.8%
8. UPDATE 1.2%
9. GLOSSARY 0.6%
10. EXPERIMENTS 0.6%
11. All others 1.8%
INSmm/dd ins MELVYL INSPEC DATABASES TELNET STATISTICS (weekly)