MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 02/01/01 through 02/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 46 1,749 1,795
Davis 217 34 251
Irvine 447 0 447
Los Angeles 23 829 852
Riverside 14 24 38
San Diego 317 1,034 1,351
San Francisco 87 0 87
Santa Barbara 98 285 383
Santa Cruz 25 134 159
Lawrence Berkeley 0 359 359
Lawrence Livermore 0 273 273
Los Alamos 0 0 0
Other - UC 11 281 292
Other-Network UC n/a 1,667 1,667
_______ ______ _____
1,285 6,669 7,954
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 4,840 11,675 103,186
INS90 1,151 2,024 12,130
INS85 831 1,501 8,133
INS80 600 1,029 4,995
INS69 532 1,090 7,323
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 132 287 2,725
2-4 a.m. 134 418 3,674
4-6 a.m. 113 284 1,755
6-8 a.m. 354 723 5,055
8-10 a.m. 896 2,070 15,948
10-12 a.m. 1,307 2,772 20,984
12-2 p.m. 1,248 2,522 21,947
2-4 p.m. 1,426 3,071 22,278
4-6 p.m. 1,138 2,509 22,243
6-8 p.m. 671 1,466 9,250
8-10 p.m. 268 627 4,506
10-12 p.m. 267 570 5,402
__________ __________ __________ _________________
Total: 7,954 17,319 135,767
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 104 3,775 3,879
Davis 505 61 566
Irvine 1,219 0 1,219
Los Angeles 39 1,841 1,880
Riverside 35 65 100
San Diego 861 2,159 3,020
San Francisco 198 0 198
Santa Barbara 194 708 902
Santa Cruz 63 305 368
Lawrence Berkeley 0 819 819
Lawrence Livermore 0 807 807
Los Alamos 0 0 0
Other - UC 32 614 646
Other-Network UC n/a 2,915 2,915
_______ ______ _____
3,250 14,069 17,319
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 737 27,873 28,610
Davis 6,159 314 6,473
Irvine 13,019 0 13,019
Los Angeles 235 20,003 20,238
Riverside 111 376 487
San Diego 3,760 15,830 19,590
San Francisco 1,773 0 1,773
Santa Barbara 1,194 8,673 9,867
Santa Cruz 346 2,039 2,385
Lawrence Berkeley 0 6,438 6,438
Lawrence Livermore 0 5,715 5,715
Los Alamos 0 0 0
Other - UC 394 4,573 4,967
Other-Network UC n/a 16,205 16,205
_______ ______ _____
27,728 108,039 135,767
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 6.6
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 INSPEC Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 7:44
Average session length (minutes:seconds) 12:00
Longest session recorded (minutes:seconds) 318:43
Average number of searches completed per session 2.1
Retrievals per search - median 6.0
Retrievals per search - average 909.3
Retrievals per search - standard deviation 16827
Percent of searches completed with 0 results 27.0%
Percent of searches entered that are long 5.3%
Percent of long searches completed
(includes partial results) 73.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 15,834 31.0%
DISPLAY (excluding automatic displays) 18,390 36.0%
BROWSE 30 0.1%
SELECT 4 0.0%
HELP 352 0.7%
EXPLAIN 606 1.2%
SET/RESET 4,665 9.1%
SHOW 140 0.3%
ADD ON (AND, OR, AND NOT) 1,484 2.9%
LOGON or LOGOFF 6,981 13.7%
COMMENT 0 0.0%
SAVE 651 1.3%
USE 19 0.0%
OTHER 2,012 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 7,656 44.0% 1,776 23.2% 16 82.3 460.0
TITLE WORD 3,747 21.5% 1,572 42.0% 5 86.0 677.8
EXACT TITLE 162 0.9% 104 64.2% 2 32.7 93.5
JOURNAL 511 2.9% 186 36.4% 31 1553.1 6680.9
EXACT JOURNAL 101 0.6% 49 48.5% 44 1628.0 4385.5
SUBJECT 692 4.0% 215 31.1% 34 1198.1 4160.6
EXACT SUBJECT 45 0.3% 8 17.8% 8 1774.0 4882.1
THESAURUS 28 0.2% 9 32.1% 62 3908.2 5225.1
EXACT THESAURUS 11 0.1% 4 36.4% 1,431 2944.9 3814.2
KEYWORD 3,014 17.3% 565 18.7% 32 3005.5 31215.2
SUBFILE 6 0.0% 1 16.7% 15 319.6 670.9
FORM 127 0.7% 24 18.9% 19 159.5 839.3
DATE 208 1.2% 59 28.4% 15 640.9 1713.0
ADDED 53 0.3% 37 69.8% 16 23.1 21.1
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 283 1.6% 69 24.4% 15 319.4 1350.0
CONFERENCE 104 0.6% 37 35.6% 112 368.0 566.2
LANGUAGE 13 0.1% 2 15.4% 119 687.3 1044.5
CHEMICAL NAME 105 0.6% 36 34.3% 21 516.0 3025.0
ISSN 3 0.0% 1 33.3% 2,007 2007.0 734.0
ISBN 3 0.0% 3 100% 0 0.0 0.0
ID NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 447 2.6% 97 21.7% 7 316.2 2633.2
EXACT PE 66 0.4% 7 10.6% 2 17.0 71.8
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 24 0.1% 13 54.2% 43 443.5 888.6
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 1,752 11.2% 621 35.4% 7 223.1 1377.9
Single 13,859 88.8% 3,619 26.1% 19 898.1 15398.8
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 18 60.0% 3 16.7% 1 7.3 20.8
EXACT THESAURUS 12 40.0% 0 0.0% 1 3.7 4.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 83.9%
LONG 3.1%
TAGS 0.3%
FIELDS 4.3%
BROWSE REVIEW 0.1%
BROWSE LONG 0.0%
PERIODICALS 3.8%
COMMENTS 0.0%
Other 1.1%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 9.1%
Ten most frequent errors:
1. NS command - no next screen 43.0%
2. First word of command is invalid 27.7%
3. FIND command with invalid index name 5.4%
4. Max. # of ports to a Z39 db are in use 3.6%
5. DISPLAY command contains invalid word 3.1%
6. PS command - no previous screen 1.6%
7. DISPLAY command - no FIND results 1.4%
8. Valid command at an inappropriate time 1.2%
9. NS of SHOW/EXP command-no next screen 1.2%
10. Search term missing from search command 1.1%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. INSPEC DATABASES 14.7%
2. FIND (INSPEC DBS) 11.1%
3. GUIDE (INSPEC DBS) 9.9%
4. INSPEC BACKFILES 9.4%
5. LOCATE (INS/PSY DBS) 8.1%
6. INDEXES (INSPEC DBS) 5.4%
7. Unrecognized term 4.1%
8. MAIL 3.5%
9. COMMANDS (INS/PSY/ABI/BIO DBS) 3.5%
10. 1752 3.5%
11. All others 26.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.7%
2. First word of command is invalid 14.2%
3. DISPLAY command-first of >1 screen 6.5%
4. FIND command with zero results 5.9%
5. DISPLAY command - middle of >1 screen 5.8%
6. DISPLAY command-complete in one screen 5.1%
7. FIND command retrieves >1 book 5.0%
8. NS command - no next screen 4.5%
9. FIND command with invalid index name 3.9%
10. DISPLAY command - last of >1 screen 3.7%
11. All others 18.7%
Ten most frequent SHOW requests:
1. HISTORY 50.7%
2. INSPEC LOADING STATISTICS 13.2%
3. MAIL STATUS 11.0%
4. INSPEC NEWS 6.6%
5. SEARCH 4.4%
6. SETTINGS (INS/PSY DBS) 3.7%
7. GLOSSARY 1.5%
8. SYSTEM NEWS 1.5%
9. EXPERIMENTS 1.5%
10. I149 0.7%
11. All others 5.1%
INSmm/dd ins MELVYL INSPEC DATABASES TELNET STATISTICS (weekly)