MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 11/25/00 through 12/01/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 15 526 541
Davis 70 1 71
Irvine 115 0 115
Los Angeles 10 311 321
Riverside 8 9 17
San Diego 77 147 224
San Francisco 10 0 10
Santa Barbara 15 85 100
Santa Cruz 7 37 44
Lawrence Berkeley 0 47 47
Lawrence Livermore 0 44 44
Los Alamos 0 0 0
Other - UC 10 68 78
Other-Network UC n/a 358 358
_______ ______ _____
337 1,633 1,970
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 1,233 3,202 25,533
INS90 271 460 2,440
INS85 180 310 1,449
INS80 139 222 699
INS69 147 294 2,009
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 39 93 702
2-4 a.m. 19 77 792
4-6 a.m. 37 96 676
6-8 a.m. 55 150 833
8-10 a.m. 204 358 2,374
10-12 a.m. 302 708 5,140
12-2 p.m. 380 891 5,315
2-4 p.m. 409 884 8,003
4-6 p.m. 249 572 3,399
6-8 p.m. 113 234 2,158
8-10 p.m. 95 251 1,659
10-12 p.m. 68 174 1,079
__________ __________ __________ _________________
Total: 1,970 4,488 32,130
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 37 1,172 1,209
Davis 180 2 182
Irvine 359 0 359
Los Angeles 21 650 671
Riverside 12 41 53
San Diego 206 424 630
San Francisco 65 0 65
Santa Barbara 33 173 206
Santa Cruz 14 67 81
Lawrence Berkeley 0 148 148
Lawrence Livermore 0 88 88
Los Alamos 0 0 0
Other - UC 13 154 167
Other-Network UC n/a 629 629
_______ ______ _____
940 3,548 4,488
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 197 9,267 9,464
Davis 2,027 1 2,028
Irvine 2,953 0 2,953
Los Angeles 67 3,814 3,881
Riverside 17 514 531
San Diego 1,021 2,884 3,905
San Francisco 139 0 139
Santa Barbara 600 1,329 1,929
Santa Cruz 42 439 481
Lawrence Berkeley 0 1,138 1,138
Lawrence Livermore 0 465 465
Los Alamos 0 0 0
Other - UC 48 1,243 1,291
Other-Network UC n/a 3,925 3,925
_______ ______ _____
7,111 25,019 32,130
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
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
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Median session length (minutes:seconds) 8:17
Average session length (minutes:seconds) 12:52
Longest session recorded (minutes:seconds) 249:55
Average number of searches completed per session 2.2
Retrievals per search - median 5.0
Retrievals per search - average 391.1
Retrievals per search - standard deviation 8401.5
Percent of searches completed with 0 results 28.0%
Percent of searches entered that are long 6.1%
Percent of long searches completed
(includes partial results) 66.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,136 31.0%
DISPLAY (excluding automatic displays) 5,047 37.8%
BROWSE 5 0.0%
SELECT 0 0.0%
HELP 127 1.0%
EXPLAIN 176 1.3%
SET/RESET 1,214 9.1%
SHOW 25 0.2%
ADD ON (AND, OR, AND NOT) 352 2.6%
LOGON or LOGOFF 1,597 12.0%
COMMENT 0 0.0%
SAVE 182 1.4%
USE 4 0.0%
OTHER 474 3.6%
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 2,180 49.5% 557 25.5% 12 63.3 222.1
TITLE WORD 851 19.3% 374 43.9% 6 389.5 6654.6
EXACT TITLE 14 0.3% 9 64.3% 4 29.2 54.3
JOURNAL 96 2.2% 45 46.9% 305 4451.5 13520.3
EXACT JOURNAL 24 0.5% 3 12.5% 58 972.0 2364.6
SUBJECT 156 3.5% 49 31.4% 23 719.9 1624.2
EXACT SUBJECT 8 0.2% 3 37.5% 535 3488.2 6520.9
THESAURUS 1 0.0% 0 0.0% 10,691 10691.0 0.0
EXACT THESAURUS 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 818 18.6% 157 19.2% 29 1469.2 20427.5
SUBFILE 5 0.1% 1 20.0% 10 13.0 10.7
FORM 14 0.3% 2 14.3% 75 334.6 802.4
DATE 47 1.1% 19 40.4% 14 32.3 65.5
ADDED 2 0.0% 1 50.0% 19 19.0 0.0
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 34 0.8% 11 32.4% 17 75.6 197.4
CONFERENCE 17 0.4% 4 23.5% 342 519.7 458.0
LANGUAGE 2 0.0% 0 0.0% 55 55.0 75.0
CHEMICAL NAME 3 0.1% 0 0.0% 408 307.7 259.5
ISSN 0 0.0% 0 0.0% 0 0.0 0.0
ISBN 1 0.0% 0 0.0% 201 201.0 0.0
ID NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 123 2.8% 20 16.3% 8 397.9 2667.4
EXACT PE 8 0.2% 0 0.0% 25 107.6 234.4
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 4 0.1% 0 0.0% 30 28.0 23.1
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 351 8.7% 128 36.5% 5 104.2 762.6
Single 3,702 91.3% 999 27.0% 15 600.3 10686.2
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 5 100% 3 60.0% 3 3.0 1.4
EXACT THESAURUS 0 0.0% 0 0.0% 0 0.0 0.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 82.4%
LONG 2.3%
TAGS 0.0%
FIELDS 8.3%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 3.8%
COMMENTS 0.0%
Other 1.0%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. NS command - no next screen 41.2%
2. First word of command is invalid 27.7%
3. FIND command with invalid index name 7.4%
4. DISPLAY command contains invalid word 3.4%
5. Max. # of ports to a Z39 db are in use 3.4%
6. PS command - no previous screen 2.1%
7. Valid command at an inappropriate time 1.3%
8. Search term missing from search command 1.3%
9. DISPLAY command-record numbers too large 1.2%
10. NS of SHOW/EXP command-no next screen 1.1%
11. All others 9.9%
Ten most frequent EXPLAIN requests:
1. FIND (INSPEC DBS) 14.8%
2. INSPEC DATABASES 14.2%
3. LOCATE (INS/PSY DBS) 10.2%
4. GUIDE (INSPEC DBS) 9.1%
5. INSPEC BACKFILES 6.8%
6. INDEXES (INSPEC DBS) 6.8%
7. MAIL 4.0%
8. DATABASES 4.0%
9. COMMANDS (INS/PSY/ABI/BIO DBS) 2.8%
10. DISPLAY (INS/PSY DBS) 2.8%
11. All others 24.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.1%
2. First word of command is invalid 14.9%
3. FIND command with invalid index name 7.6%
4. DISPLAY command - middle of >1 screen 7.6%
5. FIND command with zero results 6.9%
6. DISPLAY command - last of >1 screen 5.0%
7. NS command - no next screen 4.6%
8. DISPLAY command-first of >1 screen 4.3%
9. FIND command retrieves >1 book 4.0%
10. DISPLAY command-complete in one screen 3.6%
11. All others 19.5%
Ten most frequent SHOW requests:
1. HISTORY 70.8%
2. SETTINGS (INS/PSY DBS) 8.3%
3. SEARCH 8.3%
4. INSPEC NEWS 4.2%
5. EXPERIMENTS 4.2%
6. EXPERIMENT 54 4.2%
11. All others 0.0%
INSmm/dd ins MELVYL INSPEC DATABASES TELNET STATISTICS (weekly)