View source for Biography:B. S. Daya Sagar

{{Use Indian English|date=August 2018}}
{{Infobox scientist
| image = Sagar-2014.jpg <!-- Only freely-licensed images may be used to depict living people.  See WP:NONFREE.  -->
| image_size = 
| caption =  Sagar in 2014.
| name = B. S. Daya Sagar<br />బి. ఎస్. దయా సాగర్
| birth_date = 1967
| birth_place = India
| occupation = Academic / Scientist
| field = [[Mathematical morphology]]<br />[[Geomathematics|Mathematical geosciences]]<br />[[Fractal]]s<br />[[Geographic information system|Geographical information science]]
| website =  http://www.isibang.ac.in/~bsdsagar
| workplaces        = [[Organization:Indian Statistical Institute|Indian Statistical Institute]]-Bangalore Centre<br />Multimedia University<br />National University of Singapore<br />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)
*[[Organization:IEEE Geoscience and Remote Sensing Society|IEEE Geoscience and Remote Sensing Society]] Distinguished Lecturer (2020)
* Fellow of the Indian Academy of Sciences (2022)
* Fellow of the Indian National Science Academy (2024)
| signature         = <!--(filename only)-->
| signature_alt     =
| footnotes         =
}}
'''Behara Seshadri Daya Sagar''' {{Post-nominals|post-noms= FASc, FNA, FIGU, FRGS}} also known as B. S. Daya Sagar (born in 1967 in India) is an Indian mathematical geoscientist specializing in [[Mathematical morphology|mathematical morphology]]. He is a professor of [[Computer science|computer science]] at the [[Organization:Indian Statistical Institute|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|mathematical morphology]], [[Fractal|fractal]] geometry. [[Chaos theory|chaos theory]], and their applications in [[Physics:Geophysics|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> In 2020, Sagar was selected as an IEEE Distinguished Lecturer (DL) to represent the [[Organization:IEEE Geoscience and Remote Sensing Society|IEEE Geoscience and Remote Sensing Society]].<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 {{Bare URL PDF|date=March 2022}}</ref> He, with Frits Agterberg, Qiuming Cheng, and Jennifer McKinley, led the monumental project on the Encyclopedia of Mathematical Geosciences to the completion. The first edition of two-volume 1756-page Encyclopedia of Mathematical Geosciences was published on 21 June 2023 by Springer International Publishers.<ref>{{cite book | url=https://link.springer.com/referencework/10.1007/978-3-030-85040-1 | doi=10.1007/978-3-030-85040-1 | title=Encyclopedia of Mathematical Geosciences | series=Encyclopedia of Earth Sciences Series | date=2023 | publisher=Springer | isbn=978-3-030-85039-5 | s2cid=240988561 }}</ref>

==Education==
Sagar was educated at St. Anthony's School,<ref>{{Cite web|url=http://stanthonyvizag.com/school/school-history|title = School History &#124; 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, 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 [[Organization:Indian Statistical Institute|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 [[Organization:Indian Statistical Institute#Computer science|Computer and Communication Sciences Division]]. Since 2013, he has been a professor, and currently a professor of higher administrative grade at the [[Organization:Indian Statistical Institute|Indian Statistical Institute]]. In April 2023, he took the charge as Head of the [[Organization:Indian Statistical Institute|Indian Statistical Institute]]-Bangalore Centre.

==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. Sagar was elected as a fellow by the Indian Academy of Sciences in 2022.<ref name="Fellows and Honorary Fellows Elected During 2021 (Effective 2022)">{{Cite web |url=https://www.ias.ac.in/public/Resources/News/Fellows.pdf |publisher=Indian Academy of Sciences}}</ref> 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|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 |doi-access=free }}</ref>

==Honors and awards==
* Member, Honors & Recognition Committee of [[Organization:American Geophysical Union|American Geophysical Union]]<ref>{{cite web | url=https://www.agu.org/Learn-About-AGU/About-AGU/Governance/Committees/Honors-Recognition-Committee | title=AGU Honors & Recognition Committee (2022-23) {{pipe}} }}</ref> (2022-2023)
* [[Organization:IEEE Geoscience and Remote Sensing Society|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 {{Bare URL PDF|date=March 2022}}</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)|date=9 June 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
* Fellow, Indian Academy of Sciences<ref name="IASc fellows">{{Cite web |url=https://www.currentscience.ac.in/Volumes/122/03/0348.pdf |title=Academy Fellows |date=2022 |publisher=Current Science Association}}</ref>
* Fellow, Indian National Science Academy<ref name="INSA Fellows">{{Cite web |url=https://insaindia.res.in/?page_id=2789 |title=Recent Elected Fellows |date=2024 |publisher=Indian National Science Academy}}</ref>

==Books==
*{{cite book |editor1-last=Daya Sagar |editor1-first=B.S |editor2-last=Cheng |editor2-first=Q. |editor3-last=McKinley |editor3-first=J.|editor4-last=Agterberg |editor4-first=F.  |date=2023 |title=Encyclopedia of Mathematical Geosciences |series=Encyclopedia of Earth Sciences Series |publisher=SpringerOpen |location=Cham |doi = 10.1007/978-3-030-85040-1 |isbn=978-3-030-85039-5 |s2cid=240988561 }}, (Two Volumes), Pages 1756 <ref>{{cite book | url=https://link.springer.com/referencework/10.1007/978-3-030-85040-1 | doi=10.1007/978-3-030-85040-1 | title=Encyclopedia of Mathematical Geosciences | series=Encyclopedia of Earth Sciences Series | date=2023 | publisher=Springer | isbn=978-3-030-85039-5 | s2cid=240988561 }}</ref>
*{{cite book |editor1-last=Daya Sagar |editor1-first=B.S |editor2-last=Cheng |editor2-first=Q. |editor3-last=Agterberg |editor3-first=F. |date=2018 |title=Handbook of Mathematical Geosciences: Fifty Years of IAMG |publisher=SpringerOpen |location=Cham |doi = 10.1007/978-3-319-78999-6 |doi-access=free |bibcode=2018hmgf.book.....D |isbn = 978-3-319-78998-9 |s2cid=199493020 }}
*{{cite book |last1=Daya Sagar |first1=B. S.|date=2013 |title=Mathematical morphology in geomorphology and GISci |publisher=CRC Press |location=Boca Raton |isbn=9781439872000}}
*{{cite book |last=Daya Sagar |first=B. S. |year=2005 |title=Qualitative Models of Certain Discrete Natural Features of Drainage Environment |url=https://books.google.com/books?id=JuVoao7MOMEC |publisher=Allied Publishers |location=New Delhi |isbn=9788177644463}}

==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]
* [https://www.isibang.ac.in/~bsdsagar/Publications-BookReviews.html List of publications]

{{DEFAULTSORT:Sagar, B. S. Daya}}
[[Category:Mathematical morphology]]

{{Sourceattribution|B. S. Daya Sagar}}