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{{Use dmy dates|date=February 2020}}
{{Use Indian English|date=August 2018}}
{{Infobox scientist
| image = Sagar-2014.jpg 
| image_size =
| caption = Sagar in 2014.
| name = B. S. Daya Sagar
| birth_date = 1967
| birth_place = India
| occupation = Academic / Scientist
| field = [[Mathematical morphology]] [[Geomathematics|Mathematical geosciences]] [[Fractal]]s [[Geographic information system|Geographical information science]]
| website = http://www.isibang.ac.in/~bsdsagar
| workplaces = [[Indian Statistical Institute]]-Bangalore Centre [[Multimedia University]] [[National University of Singapore]] [[Andhra University College of Engineering]]
| alma_mater = [[Andhra University College of Engineering]]
| doctoral_advisors = B. S. Prakasa Rao and [https://link.springer.com/journal/11004/33/3/page/1 SVLN Rao]
| notable_students =
| awards =
* [[Georges Matheron Lectureship]] Award (2011)
*[[Krishnan Medal]] (2002)
*IAMG Certificate of Appreciation (2018)
*[[IEEE Geoscience and Remote Sensing Society]] Distinguished Lecturer (2020)
| signature = 
| signature_alt =
| footnotes =
}}
'''Behara Seshadri Daya Sagar''' {{Post-nominals|post-noms= [[Fellow of the Royal Geographical Society|FRGS]]}}, also known as B. S. Daya Sagar (born in 1967 in India) is an Indian mathematical geoscientist specializing in [[mathematical morphology]]. He is a professor of [[computer science]] at the [[Indian Statistical Institute]], [[Bangalore]].<ref>{{cite web|title=B. S. Daya Sagar.|url=http://www.isibang.ac.in/~bsdsagar|publisher=Indian Statistical Institute, Bangalore|access-date=1 November 2014}}</ref> He is known as a specialist in [[mathematical morphology]], [[fractal]] geometry. [[chaos theory]], and their applications in [[geophysics]], [[Geographic information system|geographical information science]], and computational geography. The [[Indian Geophysical Union]] awarded him the [[Krishnan Medal]] in 2002. He is the first Asian to receive the [[Georges Matheron Lectureship]] in 2011. In 2018, he received the IAMG Certificate of Appreciation by the [[International Association for Mathematical Geosciences]] for his work on the
Handbook of Mathematical Geosciences.<ref>IAMG Certificate of Appreciation at IAMG 2018 (https://www.iamg.org/images/File/documents/Newsletters/Newsletters_KS/NL97-low.pdf).</ref><ref>{{cite web|url=https://www.iamg.org/images/File/documents/Newsletters/Newsletters_KS/NL97-low.pdf |title=IAMG Newsletter No 97 December, Page 4; |date=15 December 2018 |access-date=12 January 2019}}</ref>He is an [[IEEE Geoscience and Remote Sensing Society]] Distinguished Lecturer (DL).<ref>{{Cite web|url=http://www.grss-ieee.org/education/distinguished-lecturers|title=Distinguished Lecturers}}</ref><ref>[http://www.grss-ieee.org/wp-content/uploads/2020/07/IEEE-GRSS-DL-BS-DAYA-SAGAR.pdf]</ref>

==Education==
Sagar was educated at St. Anthony's School,<ref>{{Cite web|url=http://stanthonyvizag.com/school/school-history|title = School History | St.ANTHOny's ALUMNI EDUCATIONAL & CHARITABLE TRUST}}</ref> [[Visakhapatnam]], Government High School-[[Samalkota]], and Government Arts College-Srikakulam, India. He graduated with BSc in 1987 from Shree Durga Prasad Saraf College of Arts and Applied Sciences, [[Sriramnagar, Vizianagaram|Sriramnagar]], an affiliated college of [[Andhra University]]. Subsequently, he received MSc and PhD degrees from the [[Andhra University College of Engineering]]-[[Visakhapatnam]], India, in 1991 and 1994 respectively. His PhD thesis is on 'Applications of Remote Sensing, Mathematical Morphology, and Fractals to Study Certain Surface Water Bodies'.

==Career==
After receiving his doctorate, Sagar worked in Andhra University College of Engineering as a research associate (1994–95 and 1998-98) of CSIR, and as a research scientist/principal investigator (1997-7) in the Scheme for Extramural Research for Young Scientists funded by Ministry of Science and Technology. From 1998 to 2001, he worked as a research scientist at the Centre for Remote Imaging Sensing and Processing (CRISP) of the [[National University of Singapore]]. He was appointed Associate Professor of Faculty of Engineering and Technology, [[Multimedia University]] (MMU), Malaysia in 2001 and was also a Deputy Chairman of the Centre for Applied Electromagnetics (2003–07) there. During 2007–13, he was an associate professor at the [[Indian Statistical Institute]]-Bangalore centre, and since 2009, he has been acting as founding head of SSIU, a unit established in 2009 as a constituent unit of its [[Indian Statistical Institute#Computer science|Computer and Communication Sciences Division]]. Since 2013, he has been a professor at the [[Indian Statistical Institute]].

==Research==
Sagar's research contributions span both basic and applied fields, and involves the fusion of computer simulations and modeling techniques in order to develop cogent models in discrete space to gain an understanding of dynamical behavior of complex terrestrial systems, such as water bodies, river networks, mountain objects, folds, dunes, landscapes, and rock porous media. He developed specific technologies and spatial algorithms for using data acquired at multiple spatial and temporal scales for developing cogent domain-specific models. His work employs concepts stemmed out of recent theories—such as mathematical morphology, fractals, chaos, and morphometrics—to develop spatial algorithms for (i) pattern retrieval, (ii) pattern analysis, (iii) simulation and modeling, and (iv) reasoning and visualization of the spatial and temporal phenomena of terrestrial and GISci relevance. His studies show that there exist several open challenges that need to be addressed by mathematical geosciences community. One of such challenges is to understand the complexity in spatiotemporal behaviors of several terrestrial phenomena and processes via construction of process-specific ''attractors'' that may range from ''simple'' to ''strange''.<ref>{{cite web|url=http://www.iamg.org/images/File/documents/Newsletters/NewslettersHSP/NL89lo.pdf |title=''What do Mathematical Geoscientists Do?'': Letter to the Editor by John Harbaugh of Stanford University, IAMG Newsletter, NL89, p. 5 |access-date=10 July 2015}}</ref>

==Professional==
Sagar has been honored with the [[Georges Matheron Lectureship|Georges Matheron Lectureship Award]] of [[International Association for Mathematical Geosciences]] ''for outstanding research ability in the field of spatial statistics or mathematical morphology''. In 2002 he received [[Krishnan Medal]] of the [[Indian Geophysical Union]]. As recipient of this medal, Sagar was made IGU Fellow in 2011. In 1995, he received Dr. Balakrishna Memorial Award from the Regional Centre of Andhra Pradesh Akademi of Sciences. He is an elected Fellow of Royal Geographical Society (1999), Fellow of [[Indian Geophysical Union]] (2011), Senior Member of [[IEEE]] (2003) and was a member of [[New York Academy of Science]] during 1995–96. He is on the Editorial Boards of Discrete Dynamics of Nature and Society, and Computers & Geosciences. He has published 80+ papers in peer reviewed international journals, 3 books, and 7 edited Special-Theme issues for well known journals.<ref>{{cite web|url=http://www.researcherid.com/rid/A-2654-2012 |title=Sagar: ResearcherID of Thomson Reuters |access-date=19 September 2014}}</ref> He has been on Editorial Boards of Computers & Geosciences, Mathematical Geosciences, and Discrete Dynamics in Nature & Society.

[[File:GML-Award-Sagar-Photo.jpg|thumb|right|Sagar receiving the [[Georges Matheron Lectureship]] Award-2011 of [[International Association for Mathematical Geosciences]] from [[Qiuming Cheng]] in Salzburg, Austria on 7 September 2011]]

===Professional activities===
* Editor of ''Discrete Dynamics in Nature and Society: Multidisciplinary Research and Review Journal''<ref>{{cite web|url=http://www.hindawi.com/journals/ddns/editors |title=Discrete Dynamics in Nature and Society-Editorial Board |access-date=7 September 2014}}</ref>
* Editorial Board Member, ''Computers & Geosciences''<ref>{{cite book|url=http://www.journals.elsevier.com/computers-and-geosciences/editorial-board |title=Computers & Geosciences-Editorial Board |access-date=7 September 2014}}</ref>
* Editorial Board Member, ''Mathematical Geosciences''<ref>{{cite book|url=https://www.springer.com/earth+sciences+and+geography/journal/11004?detailsPage=editorialBoard |title=Mathematical Geosciences-Editorial Board |access-date=12 January 2019}}</ref>
* Review Editor of ''Environmental Informatics-Frontiers'' ([[Frontiers Media]])<ref>{{cite web|url=http://www.frontiersin.org/Environmental_Informatics/editorialboard |title=Environmental Informatics-Frontiers-Editorial Board |access-date=15 January 2015}}</ref>
* Associate Editor of ''[[Image Analysis & Stereology]]''<ref>{{cite web|url=http://www.ias-iss.org/ojs/IAS/about/editorialTeam |title=Image Analysis & Stereology-Editorial Board |access-date=15 January 2015}}</ref>
* Founding Chairman, Bangalore Section IEEE GRSS Chapter<ref>{{cite web|url=http://sites.ieee.org/bangalore-grss |title=Bangalore Section IEEE GRSS Chapter-Homepage |access-date=7 September 2014}}</ref><ref>{{cite journal|title=Bangalore Section IEEE GRSS Chapter-News |journal=IEEE Geoscience and Remote Sensing Magazine |volume=1 |issue=2 |pages=72–73 |doi=10.1109/MGRS.2013.2260918 |year=2013 |last1=Sagar |first1=B.S. Daya |last2=Meher |first2=Saroj Kumar }}</ref>

==Honors and awards==
* [[IEEE Geoscience and Remote Sensing Society]] Distinguished Lecturer (DL).<ref>{{Cite web|url=http://www.grss-ieee.org/education/distinguished-lecturers|title=Distinguished Lecturers}}</ref><ref>[http://www.grss-ieee.org/wp-content/uploads/2020/07/IEEE-GRSS-DL-BS-DAYA-SAGAR.pdf]</ref>
* Award of IAMG Certificate of Appreciation - 2018 from [[International Association for Mathematical Geosciences]]<ref>{{cite web|url=https://www.iamg.org/images/File/documents/Newsletters/Newsletters_KS/NL97-low.pdf |title=IAMG Newsletter No 97 December, Page 4; |date=15 December 2018 |access-date=12 January 2019}}</ref>
* [[Georges Matheron Lectureship]] Award-2011 from [[International Association for Mathematical Geosciences]] '<ref>{{cite web|url=http://www.isibang.ac.in/~bsdsagar/IAMG-Award-Lecture-Photos.pdf |title=Georges Matheron Award Photos|access-date=30 August 2014}}</ref><ref>{{cite web|url=http://www.iamg.org/images/File/documents/Newsletters/NewslettersHSP/NL82lores.pdf |title=IAMG Newsletter No 82 May, Page 4; |date=1 May 2011 |access-date=25 August 2014}}</ref>
* CURZONCO-SESHACHALAM LECTURES-5(2009)<ref>{{cite web|url=http://indialibrarian-intl.blogspot.in/2009_06_09_archive.html |title=CURZONCO-SESHACHALAM LECTURES-5(2009)-Announcement|access-date=8 September 2014}}</ref><ref>{{cite web|url=http://ncsi.iisc.ernet.in/pipermail/lis-forum/2009-June/009278.html |title=CURZONCO-SESHACHALAM LECTURES-5(2009)|access-date=8 September 2014}}</ref>
*[[Krishnan Medal]] 2002 from [[Indian Geophysical Union]]
* Dr. Balakrishna Memorial Award 1995 from Regional Centre of Andhra Pradesh Akademi of Sciences
* Fellow, [[Indian Geophysical Union]]<ref name="IGU fellows">{{Cite web |url=http://iguonline.in/wp-content/uploads/2018/06/IGU-Directory.pdf |title=IGU fellows |date=2016 |publisher=Indian Geophysical Union}}</ref>
* Fellow, [[Royal Geographical Society]]

==Books==
*B. S. Daya Sagar, Qiuming Cheng, and Frits Agterberg, ''Handbook of Mathematical Geosciences: Fifty Years of IAMG'', Springer Publishers: Cham, p. 942, 2018.<ref>{{cite book|title=''Handbook of Mathematical Geosciences: Fifty Years of IAMG'', 2018, p.942 |authors=B.S. Daya Sagar, Qiuming Cheng, and Frits Agterberg |publisher=Springer Publishers, Cham |doi = 10.1007/978-3-319-78999-6|year = 2018|isbn = 978-3-319-78998-9|s2cid=199493020 |editor1-last=Daya Sagar |editor1-first=B.S |editor2-last=Cheng |editor2-first=Qiuming |editor3-last=Agterberg |editor3-first=Frits |url=http://www.oapen.org/download/?type=document&docid=1007222 }}</ref>
*B. S. Daya Sagar, ''Mathematical Morphology in Geomorphology and GISci'', CRC Press: Boca Raton, p. 546, 2013.<ref>{{cite book|url=https://books.google.com/books?id=gVm0kh0WwBQC&q=mathematical+morphology+in+geomorphology+and+gisci&pg=PA517 |title=''Mathematical Morphology in Geomorphology and GISci'', 2013, p.546 |author=B.S. Daya Sagar |publisher=CRC Press, Boca Raton |access-date=6 September 2014|isbn=9781439872000 |date=29 May 2013 }}</ref><ref>{{cite web|url=http://www.crcnetbase.com/isbn/9781439872024 |title=''Mathematical Morphology in Geomorphology and GISci'', 2013, p.546 |author=B.S. Daya Sagar |publisher=CRC Press, Boca Raton}}</ref><ref>{{cite web|url=http://www.crcpress.com/product/isbn/9781439872000 |title=Editorial Reviews on ''Mathematical Morphology in Geomorphology and GISci'' |access-date=7 September 2014}}</ref><ref>{{cite web|url=http://www.computingreviews.com/review/review_review.cfm?review_id=141739 |title=Book Review on ''Mathematical Morphology in Geomorphology and GISci'', ACM Computing Reviews, Reviewer: Jose Manuel Palomares Munoz |access-date=18 September 2014 }}{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{Cite journal|title=Book Review on "Mathematical Morphology in Geomorphology and GISci" |journal=Geomatica|volume=67|issue=4|pages=280–284|doi=10.5623/cig2013-056|year = 2013|last1 = McGrath|first1 = Gerald}}</ref><ref>{{cite journal |doi=10.1007/s11004-014-9569-3 |title=B.S. Daya Sagar: Mathematical Morphology in Geomorphology and GISci |journal=Mathematical Geosciences |volume=47 |issue=2 |pages=247–248 |year=2015 |last1=Beucher |first1=Serge |s2cid=67787177 }}</ref><ref>{{cite web|url=http://www.isibang.ac.in/~bsdsagar/Quotes-from-Renowned-Experts.pdf |title=Short Reviews by Renowned Experts on ''Mathematical Morphology in Geomorphology and GISci'' |access-date=5 November 2014}}</ref>
*B. S. Daya Sagar, ''Qualitative Models of Certain Discrete Natural Features of Drainage Environment'', Allied Publishers: New Delhi, p. 231, 2005.<ref>{{cite book|url=https://books.google.com/books?id=JuVoao7MOMEC |title=''Qualitative Models of Certain Discrete Natural Features of Drainage Environment'', 2005, Pages 231 |author=B.S. Daya Sagar |publisher=Allied Publishers, New Delhi|isbn=9788177644463 |year=2005 }}</ref>

==Edited Journal Special Issues==
*B. S. Daya Sagar (with Avik Bhattacharya, Lorenzo Bruzzone and Paul A. Rosen) (Eds.), Special Issue on "Applied Earth Observation and Remote Sensing in India", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, v. 10, no. 12, 2017.<ref>{{Cite journal | doi=10.1109/JSTARS.2017.2773847| title=Foreword to the Special Issue on Applied Earth Observation and Remote Sensing in India| journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing| volume=10| issue=12| pages=5151–5154| year=2017| last1=Bhattacharya| first1=Avik| last2=Bruzzone| first2=Lorenzo| last3=Sagar| first3=B. S. Daya| last4=Rosen| first4=Paul A.|hdl = 11572/193686| bibcode=2017IJSTA..10.5151B| hdl-access=free}}</ref>
*B. S. Daya Sagar (with Laurent Najman, Junior Barrera, Petros Maragos, and Dan Schonfeld) (Eds.), Special Issue on 'Filtering and Segmentation with Mathematical Morphology' IEEE Journal of Selected Topics in Signal Processing, v. 6, no. 7, p. 737-886, 2012.<ref>http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=6329953&punumber=4200690</ref>
*B. S. Daya Sagar (with Jean Serra) (Eds.), Special Issue on 'Spatial Information Retrieval, Analysis, Reasoning and Modelling', International Journal of Remote Sensing, v. 31, no. 22, p. 5747-6032, 2010.<ref>http://www.tandfonline.com/toc/tres20/31/22?nav=tocList</ref>
*B. S. Daya Sagar (with Lori Mann Bruce) (Eds.), Special Section on 'Surficial Mapping', IEEE Geoscience and Remote Sensing Letters (ISSN 1545-598X). v. 2, no. 4, p. 375-408, 2005.<ref>http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=32554&punumber=8859</ref>
*B. S. Daya Sagar (with [[Govindan Rangarajan]] and Daniele Veneziano) (Eds.) Special Issue on 'Fractals in Geophysics' Chaos Solitons & Fractals (Elsevier Publishers), v. 19, no. 2, p. 237-462, 2004.<ref>https://www.sciencedirect.com/science/journal/09600779/19/2</ref>
*B. S. Daya Sagar (with C. Babu Rao) (Eds.), Special Issue on 'Quantitative Image Morphology' International Journal Pattern Recognition and Artificial Intelligence (World scientific Publishers), v. 17, no. 2, p. 163-330, 2003.<ref>{{Cite web | url=http://www.worldscientific.com/toc/ijprai/17/02 | title=International Journal of Pattern Recognition and Artificial Intelligence | Vol 17, No 02}}</ref>
*B. S. Daya Sagar (Ed.): Special Issue 'In memory of the Late Professor SVLN Rao' Journal of Mathematical Geosciences (then Kluwer Academic Publishers), v. 33, no. 3, p. 245-396, 2001.<ref>https://link.springer.com/journal/11004/33/3/page/1</ref>

==Selected Recent Journal Publications==
*B. S. Daya Sagar, 2019, Variable-Specific classification of zones, pairs of zones, and clusters of a spatial system via modified gravity model, IEEE Transactions on Emerging Topics in Computing. v. 7, no. 2, p. 230-241.<ref>{{Cite journal | doi=10.1109/TETC.2016.2633436| title=Variable-Specific Classification of Zones, Pairs of Zones, and Clusters of a Spatial System via Modified Gravity Model| journal=IEEE Transactions on Emerging Topics in Computing| volume=7| issue=2| pages=230–241| year=2019| last1=Daya Sagar| first1=B. S.| s2cid=57387650}}</ref>
*Aditya Challa, Sravan Danda, B. S. Daya Sagar, and Laurent Najman, 2018, Some Properties of Interpolations Using Mathematical Morphology, IEEE Transactions on Image Processing, v. 27, no. 4, p. 2038-2048.<ref>{{Cite journal | doi=10.1109/TIP.2018.2791566|pmid = 29994169| title=Some Properties of Interpolations Using Mathematical Morphology| journal=IEEE Transactions on Image Processing| volume=27| issue=4| pages=2038–2048| year=2018| last1=Challa| first1=Aditya| last2=Danda| first2=Sravan| last3=Daya Sagar| first3=B. S.| last4=Najman| first4=Laurent| url=https://hal.archives-ouvertes.fr/hal-01484894/file/MorphologocalInterpolation_Paper.pdf|bibcode = 2018ITIP...27.2038C|s2cid = 3292376}}</ref>
*B. S. Daya Sagar and Lim Sin Liang, 2015, Morphing of Grayscale DEMs via Morphological Interpolations, IEEE Journal on Selected Topics on Applied Earth Observation and Remote Sensing, v. 8, no. 11, p. 5190-5198.<ref>{{Cite journal | doi=10.1109/JSTARS.2015.2490098| title=Morphing of Grayscale DEMs via Morphological Interpolations| journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing| volume=8| issue=11| pages=5190–5198| year=2015| last1=Daya Sagar| first1=B. S.| last2=Sin Liang Lim| bibcode=2015IJSTA...8.5190D| s2cid=44241164}}</ref>
*B. S. Daya Sagar and Lim Sin Liang, 2015, Ranks for pairs of spatial fields via metric based on grayscale morphological distances, IEEE Transactions on Image Processing, v. 24, no. 3, p. 908-918.<ref>{{Cite journal | doi=10.1109/TIP.2015.2390135|pmid = 25585422| title=Ranks for Pairs of Spatial Fields via Metric Based on Grayscale Morphological Distances| journal=IEEE Transactions on Image Processing| volume=24| issue=3| pages=908–918| year=2015| last1=Daya Sagar| first1=B. S.| last2=Sin Liang Lim|bibcode = 2015ITIP...24..908S|s2cid = 6734219}}</ref>
*B. S. Daya Sagar, 2014, Cartograms via mathematical morphology, Information Visualization, v. 13, no. 1, p. 42-58.<ref>{{Cite journal|doi = 10.1177/1473871613480061|title = Cartograms via mathematical morphology|journal = Information Visualization|volume = 13|pages = 42–58|year = 2013|last1 = Sagar|first1 = B S Daya|s2cid = 30345640}}</ref>
*B. S. Daya Sagar, 2010, Visualization of spatiotemporal behavior of discrete maps via generation of recursive median elements, IEEE Transactions on Pattern Analysis and Machine Intelligence, v. 32, no. 2, p. 378-384.<ref>{{Cite journal|doi = 10.1109/TPAMI.2009.163|pmid = 20075466|title = Visualization of Spatiotemporal Behavior of Discrete Maps via Generation of Recursive Median Elements|journal = IEEE Transactions on Pattern Analysis and Machine Intelligence|volume = 32|issue = 2|pages = 378–384|year = 2010|last1 = Daya Sagar|first1 = B.S}}</ref>
*Lim Sin Liang, and B. S. Daya Sagar, 2008, Cloud field segmentation via multiscale convexity analysis, Journal of Geophysical Research-Atmospheres, v. 113, D13208.<ref>{{Cite journal|url=https://pdfs.semanticscholar.org/f2e7/eb590deee066bc26f96dda04abad89fa7c6b.pdf?_ga=2.78728660.1925104324.1512444698-2051427982.1512444698|s2cid = 16300653|doi = 10.1029/2007JD009369|title = Cloud field segmentation via multiscale convexity analysis|year = 2008|last1 = Lim|first1 = Sin Liang|last2 = Daya Sagar|first2 = B. S.|journal = Journal of Geophysical Research|volume = 113|issue = D13|pages = D13208|bibcode = 2008JGRD..11313208L|doi-access = free}}</ref>
*Alan W. C. Tan, M. V. C. Rao, and B. S. Daya Sagar, 2007, Robust signal subspace speech classifier, IEEE Signal Processing Letters, v. 14, no. 11, p. 844-847.<ref>{{Cite journal | doi=10.1109/LSP.2007.900036| title=Robust Signal Subspace Speech Classifier| journal=IEEE Signal Processing Letters| volume=14| issue=11| pages=844–847| year=2007| last1=Tan| first1=Alan W. C.| last2=Rao| first2=M. V. C.| last3=Sagar| first3=B. S. Daya| bibcode=2007ISPL...14..844T| s2cid=18060844}}</ref>
*B. S. Daya Sagar, 2007, Universal scaling laws in surface water bodies and their zones of influence, Water Resources Research, v. 43, no. 2, W02416.<ref>{{Cite journal|doi = 10.1029/2006WR005075|title = Universal scaling laws in surface water bodies and their zones of influence|journal = Water Resources Research|volume = 43|issue = 2|pages = W02416|year = 2007|last1 = Sagar|first1 = B. S. Daya|bibcode = 2007WRR....43.2416S|doi-access = free}}</ref>
*Alan W. C. Tan, M. V. C. Rao, and B. S. Daya Sagar, 2007, A discriminative signal subspace speech classifier, IEEE Signal Processing Letters, v. 14, no. 2, p. 133-136.<ref>{{Cite journal | doi=10.1109/LSP.2006.882091| title=A Discriminative Signal Subspace Speech Classifier| journal=IEEE Signal Processing Letters| volume=14| issue=2| pages=133–136| year=2007| last1=Tan| first1=Alan W. C.| last2=Rao| first2=M. V. C.| last3=Sagar| first3=B. S. Daya|citeseerx = 10.1.1.1027.8821| bibcode=2007ISPL...14..133T| s2cid=12843749}}</ref>
*Lea Tien Tay, B. S. Daya Sagar, and Chuah Hein Teik, 2006, Allometric relationships between travel-time channel networks, convex hulls, and convexity measures, Water Resources Research, v. 42, no. 6,W06502.<ref>{{Cite journal|doi = 10.1029/2005WR004092|title = Allometric relationships between traveltime channel networks, convex hulls, and convexity measures|journal = Water Resources Research|volume = 42|issue = 6|pages = W06502|year = 2006|last1 = Tay|first1 = Lea Tien|last2 = Sagar|first2 = B. S. Daya|last3 = Chuah|first3 = Hean Teik|bibcode = 2006WRR....42.6502T|citeseerx = 10.1.1.331.2779}}</ref>
*Lea Tien Tay, B. S. Daya Sagar, and Chuah Hein Teik, 2005, Analysis of geophysical networks derived from multiscale digital elevation models: a morphological approach, I.E.E.E Geoscience and Remote Sensing Letters. v. 2, no. 4, p. 399-403.<ref>{{Cite journal | doi=10.1109/LGRS.2005.856008| title=Analysis of Geophysical Networks Derived from Multiscale Digital Elevation Models: A Morphological Approach| journal=IEEE Geoscience and Remote Sensing Letters| volume=2| issue=4| pages=399–403| year=2005| last1=Tay| first1=L.T.| last2=Sagar| first2=B.S.D.| last3=Chuah| first3=H.K.| bibcode=2005IGRSL...2..399T| s2cid=6954910}}</ref>
*L. Chockalingam and B. S. Daya Sagar, 2005, Morphometry of network and non-network space of basins, Journal of Geophysical Research-Solid Earth, v. 110, B08203.<ref>{{Cite journal|doi = 10.1029/2005JB003641|title = Morphometry of network and nonnetwork space of basins|journal = Journal of Geophysical Research|volume = 110|issue = B8|pages = B08203|year = 2005|last1 = Chockalingam|first1 = L|last2 = Daya Sagar|first2 = B. S|bibcode = 2005JGRB..110.8203C|doi-access = free}}</ref>
*B. S. Daya Sagar, 2005, Discrete simulations of spatio-temporal dynamics of small water bodies under varied streamflow discharges, Nonlinear Processes in Geophysics, v. 12, p. 31-40.<ref>https://www.nonlin-processes-geophys.net/12/31/2005/npg-12-31-2005.pdf</ref>
*B. S. Daya Sagar and L. Chockalingam, 2004, Fractal dimension of non-network space of a catchment basin, Geophysical Research Letters, v. 31, no.12, L12502.<ref>{{Cite journal|doi = 10.1029/2004GL019749|title = Fractal dimension of non-network space of a catchment basin|journal = Geophysical Research Letters|volume = 31|issue = 12|year = 2004|last1 = Sagar|first1 = B. S. Daya|last2 = Chockalingam|first2 = L|pages = n/a|bibcode = 2004GeoRL..3112502S|citeseerx = 10.1.1.329.6449}}</ref>
*B. S. Daya Sagar and Tay Lea Tien, (2004) Allometric power-law relationships in a Hortinian fractal digital elevation model, Geophysical Research Letters, v. 31, no. 6, L06501.<ref>{{Cite journal|doi = 10.1029/2003GL019093|title = Allometric power-law relationships in a Hortonian fractal digital elevation model|journal = Geophysical Research Letters|volume = 31|issue = 6|year = 2004|last1 = Sagar|first1 = B. S. Daya|last2 = Tien|first2 = Tay Lea|pages = n/a|bibcode = 2004GeoRL..31.6501S}}</ref>

==See also ==
* [[International Association for Mathematical Geosciences]]

==References==
{{Reflist}}

==External links==
* [http://www.isibang.ac.in/~bsdsagar/ Daya Sagar's page at Indian Statistical Institute]

{{authority control}}

{{DEFAULTSORT:Sagar, B. S. Daya}}
[[Category:Living people]]
[[Category:1967 births]]
[[Category:Andhra University alumni]]
[[Category:Indian Statistical Institute faculty]]
[[Category:Telugu people]]
[[Category:Scientists from Visakhapatnam]]
[[Category:Scientists from Bangalore]]
[[Category:Mathematical morphology]]
[[Category:Andhra University College of Engineering alumni]]
[[Category:Fellows of the Indian Geophysical Union]]
[[Category:Georges Matheron Lectureship recipients]]
[[Category:National University of Singapore faculty]]
[[Category:Multimedia University]]
[[Category:20th-century Indian earth scientists]]
[[Category:Fellows of the Royal Geographical Society]]
[[Category:20th-century Indian mathematicians]]

B. S. Daya Sagar - Revision history

imported>Ab207 at 16:22, 16 August 2021