Communication with
customers: A statistical
M S SridharHead, Library & Documentation
ISRO Satellite Centre
Bangalore 560 017
E-mail: [email protected]
of a special library
19887
44774047
1328897 726 557 447 348 286 290
1524
0
5 0 0 0
10 0 0 0
15 0 0 0
2 0 0 0 0
2 5 0 0 0
0 1 2 3 4 5 6 7 8 9 10 >10
No. of times borrowed
No
. o
f b
oo
ks
No. times borrwed in 3.5 yrs No. of books % Cumulative %
0 19887 57.12 57.12
1 4477 12.56 69.68
2 4047 11.93 81.61
3 1328 3.81 85.42
4 897 2.57 87.99
5 726 2.02 90.1
6 557 1.58 91.68
7 447 1.28 92.96
8 348 1 93.96
9 286 0.92 94.78
10 290 0.84 95.62
>10 1524 4.38 100
Statistical miscellany – M S Sridhar, Head, LDD
Frequency of borrowed use of books
Statistical miscellany - 1 M S Sridhar, Head, LDD (April 16, ’02)
Use of library books
RANK GRP MEM BKS AVERAGE/PROJ BERS LENT
1 TPD 19 511 26.892 MDG 118 2810 23.813 CIG 49 1156 23.594 PPEG 27 604 22.375 SMG 50 1098 21.966 CSG 115 2380 20.707 STG 73 1471 20.158 CMG 88 1683 19.139 TSG 103 1913 18.5710 SRG 137 2528 18.4511 AITG 188 3288 17.4912 DSG 95 1612 16.9713 ICG 92 1486 16.1514 PSG 113 1719 15.2115 IRS 42 622 14.8116 INSAT 37 521 14.0817 FAC 419 3042 7.2618 DDs,... 18 85 4.7219 LEOS 110 394 3.5820 ADMN 296 947 3.20Sub-total 2189 29870 13.65OTHERS 41 345 8.41LPSC 144 252 1.75TOTAL 2374 30467 12.83
0 500 1000 1500 2000 2500 3000 3500
TPD
MDG
CIG
PPEG
SMG
CSG
STG
CMG
TSG
SRG
AITG
DSG
ICG
PSG
IRS
INSAT
FACILITY
DDS,ETC.
LEOS
ADMN
NO. OF BOOKS BORROWED PER YEAR
Statistical miscellany – 2 M S Sridhar, Head, LDD (May 1, 02)
Suggestions for new books
GP/PR 2000-1 01-2 02-03
AITG 48 22 3
CIG 37 49 1
CMG 24 17 3
CSG 100 59 5
DSG 11 5 0
ICG 12 6 0
MDG 12 6 0
PSG 6 6 0
PPEG 19 15 3
SMG 4 4 0
SRG 115 55 0
STG 36 31 4
TSG 35 17 3
TPD 39 40 6
FACILITY 20 10 1
INSAT 0 2 0
IRS 8 0 0
DDs, etc. 9 20 10
LEOS 0 1 0
ADMN, etc. 0 22 0
TOTAL 535 387 39
AITG
CIG
CMG
CSG
DSG
ICG
MDG
PSG
PPEG
SMGSRG
STG
TSG
TPD
FACILITY
INSAT
IRS
DDs, etc.
LEOS
ADMN, etc.
020
4060
80100
120140
2000-1
2001-2
2002-3(1stQ)
NO. OF BOOKS SUGGESTED
Statistical miscellany – 3 M S Sridhar, Head, LDD
ISAC authors well cited internationally!No. of times cited
No. of articles
Total citations
89 1 89
58 1 58
38 1 38
36 1 36
20 1 20
18 1 18
16 2 32
15 2 30
12 1 12
10 3 30
9 2 18
8 3 24
7 3 21
6 5 30
5 9 45
4 10 40
3 11 33
2 15 30
1 40 40
Total 112 644
• SCI* covered 269 journal articles
of ISAC authors
• 112 ISAC papers have been
cited 644 times in international
journals (Average or Impact
Factor: 2.39)
---------------------------------------------------* Science Citation Index of Institute for Scientific
Information, USANote: SCI does not cover all journals
Authors/ co-authors of ISAC papers having 15 or more citations :
KASTURIRANGAN K;MARAR TMK;
SEETHA S;ASHOKA BN;
JAIN AK;SHARMA AK
NAGENDRA CL;
THUTUPALLI GKM;
REDDY MR
Statistical miscellany – 4 M S Sridhar, Head, LDD
Internal reports produced & archived
YEAR-WISE PRODUCTION
TOTAL:
PRODUCED: 2172
ARCHIVED : 1933
205
236
238
271
325
394
440
63
0 1 00 200 300 400 500
1 995
1 996
1 997
1 998
1 999
2000
2001
2002( M AR)
265
1
16
86
137
37
214
136
23
79
342
238
158
7
39
97
39
2
17
288
1
24
98
145
40
260
137
35
86
372
261
166
7
40
115
78
2
17
AITG
CIG
CMG
CSG
DSG
ICG
MDG
PSG
PPEG
SMG
SRG
STG
TSG
TPD
FACILITY
INSAT
IRS
LEOS
OTHERS
0 100 200 300 400
PR ODU C ED
A R C HIVED
Statistical miscellany –5 M S Sridhar, Head, LDD
Holdings of ISRO libraries
37550
1800012000
3275026250
57000
129000
14000
3000
47000
16100
122000
21750
7150
15000 12150
37000
2000
0
20000
40000
60000
80000
100000
120000
140000
ISAC ISRO HQ NRSA SAC SHAR VSSC
BOOKS REPORTS BOUND JLS
CENTRE BOOKS REPORTS BD JLS
ISAC 37550 129000 21750
ISRO HQ 18000 14000 2000
NRSA 12000 3000 7150
SAC 32750 47000 15000
SHAR 26250 16100 12150
VSSC 57000 122000 37000
TOTAL 183550 331100 95050
0
2000
4000
6000
8000
10000
12000
Com
pute
r Sci
ence
Tele
com
munic
atio
n
Elec
tron
ics
Man
agem
ent
Mat
hem
atic
s
Elec
tric
al e
ngi
nee
ring
Med
ical
Sci
ence
s
Mat
eria
ls tes
ting,
etc
.,
Phys
ics an
d M
echan
ics
Air
and
spac
e tr
ansp
ort en
gg.
Con
trol
theo
ry
Ast
ronom
y
Man
ufa
cture
s, indu
stri
es, e
tc.,
Chem
istr
y, G
eolo
gy, B
iolo
gy, e
tc.
USE/ YR .
C OLLEC T ION
RANK SUBJECT USE/ COLLEC RATIO OF YEAR TION USE TO COLN
1 Computer Science 11141 7314 1.522 Telecommunication 2372 2144 1.113 Electronics 3463 3314 1.044 Management 1133 1102 1.035 Mathematics 1515 1545 0.986 Electrical engineering 1917 2233 0.867 Medical Sciences 359 504 0.718 Materials testing, etc., 682 1048 0.659 Physics and Mechanics 1999 3147 0.6410 Air and space transport engg. 1519 2774 0.5511 Control theory 462 1038 0.4512 Astronomy 657 2020 0.3313 Manufactures, industries, etc., 251 854 0.2914 Chemistry, Geology, Biology,… 228 915 0.25
Statistical miscellany –6 M S Sridhar, Head, LDD (July 1, 2002)
Subject-wise collection & lent-out use of books
Statistical miscellany – 7 M S Sridhar, Head, LDD (July 16, 2002)
Growth of ISAC Library
year members documents current jls use area
1975 285 2300 72 800 800
1987 1800 114000 582 142000 8000
2000 2272 200000 493 240000 18000
285
1800
2272
23
1140
2000
72
582493
80
1420
2400
80
800
1800
membersdocs in '00
current jlsuse in'00
area in '0 sq. ft.0
500
1000
1500
2000
2500
3000
YR. 1975
YR. 1987
YR. 2000
Statistical miscellany – 8 M S Sridhar, Head, LDD (August 1, 2002)
Journals & reports are less used than before (1982)
ST ANDAR
DS
0. 6%
NON-
BOOK
M AT E RI A
LS
1 . 6%
RE P ORT S
1 . 2%
JOURNAL
S
1 2. 3%
BOOKS
84. 3%
% of total borrowing increase/ NOW (2002) THEN (1982) decrease
BOOKS 84.3 80.0 + 4.3 REPORTS 1.2 5.0 - 3.8JOURNALS 12.3 14.8 - 2.5STANDARDS 0.6 0.2 + 0.4NON-BOOK 1.6 0.0 + 1.6MATERIALS
Percentage of total lent-out use
14.8
0.2 0
5.0
80.0
84.3
1.2
12.3
0.6 1.6
0
10
20
30
40
50
60
70
80
90
B OOKS R EPOR TS JOU R N A LS STA N D A R D S N ON - B OOK
M A TER IA LS
THEN (1982) NOW (2002)
2002
Statistical miscellany – 9 M S Sridhar, Head, LDD (August 16, 2002)
Reduction in journals subscribed and reports added over the years
0
200
400
600
800
1000
1200
1980 1985 1990 1995 2000 2002
Reports (annual intake)
Journals (subscribed)
Reports Journals
Year (annual intake) (subscribed)
1980 1063 533
1985 936 519
1990 523 444
1995 288 416
2000 67 326
2002 29 300
Statistical miscellany - 10 M S Sridhar, Head, LDD (Sep. 1, ’02)
Journals and reports are more used (and cited in JST) by ISAC authors than others
84.3%
1.2%
12.3% 2.2%
% lent out
33.3%
25.7%
35.1%
5.9%
% citedbooks
reports
j ournals
others
•In other words, journals & reports
are less borrowed than books but
more cited in JST (Journal of
Spacecraft Technology)
•E-version of JST accessible at
http://www.j-gate.informindia.co.in
Documents % Borrowed % Cited
Books 84.3 33.3
Reports 1.2 25.7
Journals 12.3 35.1
Others 2.2 5.9
Total 100 100
Statistical miscellany-11 M S Sridhar, Head, LDD (Sep 16, ’02)
Percentage of time spent on print medium remained same over the years - National Readership Survey
TV
72.0%
RADIO
11.0%
INTERNET
1.0%
16.0%2001
TVRADIO
INTERNETPRINT
0
10
20
30
40
50
60
70
80
1995(%)
2001(%) Note: 2001 survey had 212,000
adult respondents; average
urban Indian spends 2 hrs a day
on media consumption
1995(%) 2001(%)
TV 62 72
RADIO 22 11
INTERNET 0 1
PRINT 16 16
Statistical miscellany-12 M S Sridhar, Head, LDD (Oct. 1, ’02)
Subject-wise misplacement / loss of books(for a period of 3 years & 3 months)
7 5
2 1
1 6
1 4
9
8
6
5
4
4
1 9
3 9 8
3 4
1 2
3 4
1 6
5
7
8
2
1 3
2 3
0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0
Computer Sci ence
E l ect r oni cs & E l Engg
Phy & Ast r onomy
Space Sci ence
M anagement
M ech. & Ci vi l Engg.
M athemat i cs
M edi cal Sci ence
T el ecommuni cat i on
Bui l di ng i nd. , ar ts, etc.
Other subj ects
Val uei n '00(Rs. )
No.
Rank Subject No. % Value(Rs.) %
1 Computer Science 75 41.4 39824 72.1
2 Electronics & El Engg. 21 11.6 3369 6.1
3 Phy & Astronomy 16 8.8 1163 2.1
4 Space Science 14 7.7 3439 6.2
5 Management 9 5.0 1586 2.9
6 Mech. & Civil Engg. 8 4.4 543 1.0
7 Mathematics 6 3.3 671 1.2
8 Medical Science 5 2.8 766 1.4
9 Telecommunication 4 2.2 182 0.3
9A Building ind., arts, etc. 4 2.2 1322 2.4
Other subjects 19 10.5 2345 4.2
Total 181 100.0 55210 100.0
Statistical miscellany –13 M S Sridhar, Head, LDD (Oct. 16, ’02)
Web Characterisation & use surveys
1. the ‘invisible’ or ‘deep’ web is over 500 times larger than ‘surface’ web
2. 25000 'mega sites' represent 50% contents
3. mean size of a public site is > 130 pages
4. no engine is indexing > 16% 0f publicly accessible sites
5. over 8000 search engines; >800 m pages ; >8 m sites
Effectiveness of sitesclearly
designed
sites
2%
brochure
w are
sites
40%
no sites
found
58%
T ype o f sites
Pr ivate
21%
Pr ovisional
38% Publ ic
41%
3 8
7
8
1 0
3
0 1 0 2 0 3 0 4 0
general
information
academic
information
chat
job related
information
Internet use in India
• ½ hr to 2 hrs per day (av: 86.1 min.)
• 97% for e-mail purpose
• top of mind recall : yahoo 22%
hotmail 13%
% of time spent
Statistical miscellany – 14 M S Sridhar, Head, LDD (Nov. 1, ’02}
Test reports are maximum among types of internal reports generated
INTERNAL REPORTS
SL. NO. TYPE NO.
A. CENTRE REPORTS
1 GR 60
2 TR 602
3 ST 83
SUB TOTAL 745
B. PROJECT REPORTS
4 RR 269
5 TE 772
6 AR 254
7 PR 326
SUB TOTAL 1621
TOTAL 2366
T ype of r epor t s pr oduced
60
602
83
269
772
254
326
0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0
Gener al r ep.
T echni cal r ep
St andar ds
Revi ew r ep
T est r ep
Anal ysi s r ep
P r oj ect r ep
Internal reports produced (30 Sep. '02)
CENTRE
31%
PROJECTS
69%
Statistical miscellany – 15 M S Sridhar, Head, LDD ( Nov. 18, ’02)
Online Public Access Catalogues (OPACs) of ISRO libraries put together have 7 lakh records
CENTRE OPAC
ISAC 200000
ISRO HQ 35000
NRSA 25000
SAC 145000
SHAR 62000
VSSC 230000
TOTAL 697000
OPACs of ISRO Libraries
ISA C
2 9 %
V SSC
3 2 %
SHA R
9 %SA C
2 1 %
N R SA
4 %
ISR O
HQ
5 %
Statistical miscellany – 16 M S Sridhar, Head, LDD (Dec. 1, ’02)
Biggest Libraries of the World (Volumes in millions)
23
1 6
1 4. 5
1 4. 4
1 3
1 2. 9
1 1 . 8
1 1 . 3
1 0. 5
9. 5
3
0 5 1 0 1 5 20 25
Li br ar y of Congr ess
Nat i onal Li br ar y of Chi na
Nat i onal Li br ar y of Canada
Deut sch bi bl i ot ek ( Ger many)
Br i t i sh Li br ar y
Har var d Uni ver si t y Li br ar y
Russi an St at e Li br ar y
Nat i onal Di et Li br ar y ( Japan)
New Y or k P ubl i c Li br ar y
Y al e Uni vi ver si t y Li br ar y
Nat i onal l i br ar y of I ndi aRANK NAME PLACE VOLS IN M
1 Llibrary of congress Wash, DC 23
2 N.L. of China Beijing 16
3 N.L. of Canada Ottawa 14.5
4 Deutsch bibliotek Frankfurt 14.4
5 British Library London 13.0
6 Harvard University Cambridge 2.9
7 Russian State Library Moscow 11.8
8 Nat.Diet Library Tokyo 11.3
9 New York Pub. Lib. New York 10.5
10 Yale Univ. Library New Heron 9.5
Note: Indian National library claims to have several million items including 3 m books
Statistical miscellany – 17 M S Sridhar, Head, LDD (Dec16, ’02)
Citing habits of ISAC authors
No references With references
Internal reports* 119 99
Papers in JST@ 18 96
INTERNAL REPORTS*
N OT HA V IN G R EF ER EN C ES
HA V IN G ON E OR M OR E R EF ER EN C ES
PAPERS IN JST@
*Checked 10 % systematic
random sample; @ Checked
all 114 papers in 13 issues
from 91-97
No
references
(59.4%)
No
references
(15.8%)
(655 references
In 119 reports)
(844 references
In 96 ppers)
Statistical miscellany –18 M S Sridhar, Head, LDD (Jan 1, ’03)
Reservations for books
AIT G
C IG
C MG
C SG
DSG
IC G
MDG
P SG
P P E G
SMG
SR G
ST G
T SG
T P D
FAC ILIT Y
INSAT
IR S
OT HE R P r .
DDs , e t c .
LE OS
ADMN, e tc .
OT HE R S
0 2 0 0 4 0 0 6 0 0
Rank Gr./ Pr. Res./yr. Members Average
1 DSG 518 95 5.5
2 CIG 253 49 5.2
3 CSG 440 115 3.8
4 PPEG 102 27 3.8
5 SMG 183 50 3.7
6 TPD 67 19 3.5
7 SRG 442 137 3.2
8 AITG 495 188 2.6
9 STG 181 73 2.5
10 MDG 279 118 2.4
11 PSG 262 113 2.3
12 CMG 188 88 2.1
13 ICG 174 92 1.9
14 INSAT 62 37 1.7
15 IRS 62 42 1.5
16 TSG 141 103 1.4
17 DDs 17 18 0.9
18 Facility 306 419 0.7
19 Others 108 185 0.6
20 ADMN 93 296 0.3
21 LEOS 26 110 0.2
Total 4399 2374 1.9
Over one
year
4168
6119
76
1474
101
6762
148
1351
206
57
54
39
33
43
19
25
30
22
Statistical miscellany –19 M S Sridhar, Head, LDD (Feb 6, ’05)
Visit to Library Homepage during August 2004
References1. Anderson, T W and Sclove, Stanley L. An introduction to the statistical analysis of data. Boston : Houghton Miffin Company, 1978.
2. Best, Joel. Damned lies and statistics. California: University of California Press, 2001.3. Best, Joel. More damned lies and statistics; how numbers confuse public issues. Berkeley: University of California
Press, 20044. Koosis, Donald J. Baseness statistics. New York: John Wiley,1972.5. Miller, Jane E. The Chicago guide to writing about numbers. Chicago: the University of Chicago Press, 2004.6. Rodger, Leslie W. Statistics for marketing. London: Mc-Graw Hill, 1984.7. Salvatoe, Dominick. Theory and problems of statistics and econometrics (Schaum‟s outline series). New York:
McGraw-Hill, 1982.8. Simpson, I.S. How to interpret statistical data: a guide for librarians and information scientists. London: Library
Association, 1990.9. Sridhar, M S. "User participation in collection building in a special library : a case study." IASLIC Bulletin 28 (3)
September 1983: 117-122.
10. Sridhar, M S. "Book procurement delay : a de-motivator to user participation in collection development". In : Building Library Collections and National Policy for Library and Information Services : Seminar Papers presented in XXX All India Library Conference, Rajasthan University, Jaipur, 28-31 January 1985. ed. by P.B.Mangala. Delhi: ILA, 1985. 329-334.
11. Sridhar, M S. "Library-use index and library-interaction index as measures of effectiveness of a special library : a case study." In : Proceedings of XXXIV All India Library Conference on Library and Information Services : Assessment and Effectiveness. Calcutta : ILA, 1988 : 449-465.
12. Sridhar, M S. "Library use and user research: with twenty case studies". New Delhi: Concept Publishing Company, 2002.
13. Sridhar, M S. “OPAC vs. card catalogue : a comparative study of user behaviour” , The Electronic Library, 22 (2) April 2004, p 175 - 183.
14. Sridhar, M S. “Subject searching in the OPAC of a special library: problems and issues”, OCLC Systems and Services: International Digital Library Perspectives, 20 (4) Winter 2004, p 183 - 191.
References
About the Author
Dr. M.S.Sridhar is a post graduate in mathematics and business management
and a doctorate in library and information science. He is in the profession for last
35 years. Since 1978 he is heading the Library and Documentation Division of
ISRO Satellite Centre, Bangalore. Earlier he has worked in the libraries of
National Aeronautical Laboratory (Bangalore), Indian Institute of Management
(Bangalore) and University of Mysore. Dr. Sridhar has published four books („User
research: a review of information-behaviour studies in science and technology‟,
„Problems of collection development in special libraries‟, „Information behaviour of
scientists and engineers‟ and „Use and user research with twenty case studies‟) and
74 research papers, written 19 course material for BLIS and MLIS, presented over 22
papers in conferences and seminars, and contributed 5 chapters to books. E-mail:
[email protected], [email protected], [email protected] ; Phone:
91-80-25084451; Fax: 91-80-25084475.