Behara Seshadri Daya Sagar 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. He is known as a specialist in mathematical morphology,

fractal In mathematics, a fractal is a geometric shape containing detailed structure at arbitrarily small scales, usually having a fractal dimension strictly exceeding the topological dimension. Many fractals appear similar at various scales, as illu ...

geometry.

chaos theory Chaos theory is an interdisciplinary area of scientific study and branch of mathematics focused on underlying patterns and deterministic laws of dynamical systems that are highly sensitive to initial conditions, and were once thought to have co ...

, and their applications in geophysics,

geographical information science Geographic information science or geographical information science (GIScience or GISc) is the scientific discipline that studies geographic information, including how it represents phenomena in the real world, how it represents the way humans unders ...

, and computational geography. The Indian Geophysical Union awarded him the

Krishnan Medal The Krishnan Medal is an Indian geology award given annually by the Indian Geophysical Union. The award is named after M. S. Krishnan, an eminent geologist. Overview The Indian Geophysical Union instituted thKrishnan Medalto be awarded each year ...

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 The International Association for Mathematical Geosciences (IAMG) is a nonprofit organization of geoscientists. It aims to promote international cooperation in the application and use of mathematics in geological research and technology. IAMG's act ...

for his work on the Handbook of Mathematical Geosciences. In 2020, Sagar was selected as an IEEE Distinguished Lecturer (DL) to represent the IEEE Geoscience and Remote Sensing Society.

Education

Sagar was educated at St. Anthony's School, 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 The National University of Singapore (NUS) is a national public research university in Singapore. Founded in 1905 as the Straits Settlements and Federated Malay States Government Medical School, NUS is the oldest autonomous university in the c ...

. 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 Computer and Communication Sciences Division. Since 2013, he has been a professor, and currently a professor of higher administrative grade at the Indian Statistical Institute. In April 2023, he took the charge as Head of the 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''.

Professional

Sagar has been honored with the Georges Matheron Lectureship Award of

''for outstanding research ability in the field of spatial statistics or mathematical morphology''. In 2002 he received

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. 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. He has been on Editorial Boards of Computers & Geosciences, Mathematical Geosciences, and Discrete Dynamics in Nature & Society. GML-Award-Sagar-Photo

Professional activities

* Editor of ''Discrete Dynamics in Nature and Society: Multidisciplinary Research and Review Journal'' * Editorial Board Member, ''Computers & Geosciences'' * Editorial Board Member, ''Mathematical Geosciences'' * Review Editor of ''Environmental Informatics-Frontiers'' (

Frontiers Media Frontiers Media SA is a publisher of peer-reviewed, open access, scientific journals currently active in science, technology, and medicine. It was founded in 2007 by Kamila and Henry Markram, and has since expanded to other academic fields. Fro ...

) * Associate Editor of ''

Image Analysis & Stereology ''Image Analysis & Stereology'' (IAS) formerly ''Acta Stereologica'', is a triannual peer-reviewed scientific journal published by an independent not-for-profit publisher DSKAS. It is the official journal of the International Society for Stereo ...

'' * Founding Chairman, Bangalore Section IEEE GRSS Chapter

Honors and awards

* Member, Honors & Recognition Committee of American Geophysical Union (2022-2023) * IEEE Geoscience and Remote Sensing Society Distinguished Lecturer (DL). * Award of IAMG Certificate of Appreciation - 2018 from

* Georges Matheron Lectureship Award-2011 from

' * CURZONCO-SESHACHALAM LECTURES-5(2009) *

2002 from Indian Geophysical Union * Dr. Balakrishna Memorial Award 1995 from Regional Centre of Andhra Pradesh Akademi of Sciences * Fellow, Indian Geophysical Union * Fellow,

Royal Geographical Society The Royal Geographical Society (with the Institute of British Geographers), often shortened to RGS, is a learned society and professional body for geography based in the United Kingdom. Founded in 1830 for the advancement of geographical scien ...

* Fellow, Indian Academy of Sciences

Books

* * *

References

External links

Daya Sagar's page at Indian Statistical Institute

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