Communication with

customers: A statistical

M S SridharHead, Library & Documentation

ISRO Satellite Centre

Bangalore 560 017

E-mail: sridhar@isac.gov.in

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%

PRINT

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

e-mail

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:

sridharmirle@yahoo.com, mirlesridhar@gmail.com, sridhar@isac.gov.in ; Phone:

91-80-25084451; Fax: 91-80-25084475.