MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 04/01/99 through 04/30/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 266 4,298 4,564
Davis 616 12 628
Irvine 999 0 999
Los Angeles 102 1,946 2,048
Riverside 96 120 216
San Diego 205 2,217 2,422
San Francisco 85 1 86
Santa Barbara 388 988 1,376
Santa Cruz 173 416 589
Lawrence Berkeley 0 527 527
Lawrence Livermore 0 1,159 1,159
Los Alamos 0 0 0
Other - UC 22 248 270
Other-Network UC n/a 2,650 2,650
_______ ______ _____
2,952 14,582 17,534
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 11,106 30,064 253,716
INS90 2,255 4,232 25,402
INS85 1,731 3,156 17,440
INS80 1,299 2,344 12,648
INS69 1,143 2,631 17,189
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 360 1,199 9,387
2-4 a.m. 215 633 5,506
4-6 a.m. 280 750 4,990
6-8 a.m. 570 1,265 10,295
8-10 a.m. 1,568 3,603 25,275
10-12 a.m. 2,998 6,650 50,134
12-2 p.m. 2,884 6,686 48,176
2-4 p.m. 3,682 8,436 68,362
4-6 p.m. 2,552 6,426 53,165
6-8 p.m. 1,152 3,270 25,225
8-10 p.m. 725 2,097 16,289
10-12 p.m. 548 1,412 9,591
__________ __________ __________ _________________
Total: 17,534 42,427 326,395
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 720 9,792 10,512
Davis 1,407 25 1,432
Irvine 2,872 0 2,872
Los Angeles 253 4,275 4,528
Riverside 214 312 526
San Diego 683 5,497 6,180
San Francisco 274 9 283
Santa Barbara 873 2,416 3,289
Santa Cruz 388 1,019 1,407
Lawrence Berkeley 0 1,326 1,326
Lawrence Livermore 0 2,916 2,916
Los Alamos 0 0 0
Other - UC 28 560 588
Other-Network UC n/a 6,568 6,568
_______ ______ _____
7,712 34,715 42,427
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 5,595 73,237 78,832
Davis 8,915 76 8,991
Irvine 26,567 0 26,567
Los Angeles 3,754 33,950 37,704
Riverside 854 1,779 2,633
San Diego 2,894 44,009 46,903
San Francisco 2,105 39 2,144
Santa Barbara 6,853 23,933 30,786
Santa Cruz 2,028 8,709 10,737
Lawrence Berkeley 0 17,573 17,573
Lawrence Livermore 0 24,976 24,976
Los Alamos 0 0 0
Other - UC 149 3,078 3,227
Other-Network UC n/a 35,322 35,322
_______ ______ _____
59,714 266,681 326,395
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.3
Standard deviation in seconds 6.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 INSPEC Databases Detailed Statistics
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Median session length (minutes:seconds) 8:00
Average session length (minutes:seconds) 12:43
Longest session recorded (minutes:seconds) 423:24
Average number of searches completed per session 2.4
Retrievals per search - median 7.0
Retrievals per search - average 548.7
Retrievals per search - standard deviation 8451.0
Percent of searches completed with 0 results 26.0%
Percent of searches entered that are long 4.4%
Percent of long searches completed
(includes partial results) 64.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 38,759 30.8%
DISPLAY (excluding automatic displays) 45,540 36.1%
BROWSE 64 0.1%
SELECT 40 0.0%
HELP 1,612 1.3%
EXPLAIN 2,228 1.8%
SET/RESET 9,807 7.8%
SHOW 436 0.3%
ADD ON (AND, OR, AND NOT) 3,650 2.9%
LOGON or LOGOFF 16,254 12.9%
COMMENT 0 0.0%
SAVE 2,296 1.8%
USE 103 0.1%
OTHER 5,310 4.2%
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 17,284 41.2% 4,248 24.6% 16 72.9 262.1
TITLE WORD 8,072 19.2% 3,030 37.5% 7 91.2 714.3
EXACT TITLE 292 0.7% 159 54.4% 1 18.8 75.0
JOURNAL 1,114 2.7% 427 38.3% 116 3189.8 12665.2
EXACT JOURNAL 233 0.6% 91 39.1% 214 3701.6 10123.3
SUBJECT 2,245 5.4% 783 34.9% 26 444.0 1525.8
EXACT SUBJECT 85 0.2% 20 23.5% 77 1123.0 2055.0
THESAURUS 24 0.1% 11 45.8% 1,192 6624.1 14722.3
EXACT THESAURUS 30 0.1% 4 13.3% 626 2953.3 4521.4
KEYWORD 9,014 21.5% 1,616 17.9% 41 2257.2 19422.7
SUBFILE 29 0.1% 6 20.7% 26 31.6 22.7
FORM 274 0.7% 38 13.9% 25 470.9 2451.6
DATE 648 1.5% 178 27.5% 9 181.0 1771.9
ADDED 7 0.0% 0 0.0% 432 359.6 165.5
ARTICLE 4 0.0% 0 0.0% 212 285.5 348.9
AUTHOR AFFIL. 424 1.0% 99 23.3% 25 523.5 2141.7
CONFERENCE 192 0.5% 88 45.8% 149 1522.7 4971.1
LANGUAGE 22 0.1% 2 9.1% 13 294.8 1012.3
CHEMICAL NAME 143 0.3% 27 18.9% 34 494.9 1136.3
ISSN 3 0.0% 1 33.3% 7,569 7569.0 7984.6
ISBN 8 0.0% 4 50.0% 100 83.3 37.1
ID NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 921 2.2% 237 25.7% 6 269.8 2522.9
EXACT PE 132 0.3% 27 20.5% 3 16.0 44.1
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 760 1.8% 111 14.6% 26 358.5 1912.4
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 3,729 9.8% 1,271 34.1% 7 145.0 1281.9
Single 34,407 90.2% 8,640 25.1% 21 854.7 10719.4
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:
THESAURUS 59 92.2% 22 37.3% 2 9.6 16.8
EXACT THESAURUS 5 7.8% 3 60.0% 2 1.5 0.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 86.1%
LONG 1.8%
TAGS 0.1%
FIELDS 3.5%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 3.0%
COMMENTS 0.0%
Other 2.4%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.6%
Ten most frequent errors:
1. NS command - no next screen 42.7%
2. First word of command is invalid 29.3%
3. FIND command with invalid index name 6.8%
4. DISPLAY command contains invalid word 2.6%
5. PS command - no previous screen 1.9%
6. Valid command at an inappropriate time 1.4%
7. NS of SHOW/EXP command-no next screen 1.2%
8. Search term missing from search command 1.2%
9. Invalid SET DB INS command issued 1.0%
10. DISPLAY command - no FIND results 1.0%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. FIND (INSPEC DBS) 13.8%
2. GUIDE (INSPEC DBS) 11.4%
3. INSPEC DATABASES 9.8%
4. LOCATE (INS/PSY DBS) 8.3%
5. INSPEC BACKFILES 7.7%
6. INDEXES (INSPEC DBS) 6.7%
7. Unrecognized term 4.1%
8. COMMANDS (INS/PSY/ABI/BIO DBS) 3.9%
9. MAIL 3.7%
10. DATABASES 3.5%
11. All others 27.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.8%
2. First word of command is invalid 14.6%
3. FIND command with invalid index name 6.0%
4. FIND command with zero results 6.0%
5. DISPLAY command - middle of >1 screen 5.5%
6. DISPLAY command-first of >1 screen 5.5%
7. NS command - no next screen 4.5%
8. FIND command retrieves >1 book 4.3%
9. DISPLAY command-complete in one screen 3.8%
10. DISPLAY command - last of >1 screen 3.6%
11. All others 22.4%
Ten most frequent SHOW requests:
1. HISTORY 54.4%
2. SEARCH 12.7%
3. MAIL STATUS 9.7%
4. SETTINGS (INS/PSY DBS) 4.9%
5. INSPEC NEWS 4.6%
6. PRINT 2.8%
7. DATABASES 2.3%
8. GLOSSARY 1.4%
9. SYSTEM NEWS 0.9%
10. INSPEC LOADING STATISTICS 0.7%
11. All others 5.6%