Prof. Dr. Rao Tatavarti - Freelance Ocean Engineering Consultant in Andhra Pradesh, India

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Dr. Rao Tatavarti possesses an outstanding academic and research career, built on the firm foundation of education and training in both Sciences and Engineering, at some of the best institutes in the world.

Dr. Tatavarti had his first Masters in Marine Sciences with Physical Oceanography as specialization from Andhra University, where he secured the university first rank.  Later he joined IIT Madras and secured a Masters in Ocean Engineering, before moving to Canada to work for his PhD. After completing his doctoral research in Canada, Dr. Tatavarti was invited to join the Defence Research and Development Organisation in India where he had the opportunity to work on path breaking, but highly classified work related to naval surveillance. After a long stint at the Naval Physical & Oceanographic Laboratory in Kochi as a Senior Scientist, Dr. Tatavarti opted for voluntary retirement when he was the Director Grade Scientist to move to academia as a Senior Professor and Director (Research & Development) at VIT University, Vellore. From Vellore, Prof. Tatavarti moved to Visakhapatnam where he is currently, a Senior Professor and the Director (Research and Consultancy) at Gayatri Vidya Parishad academic institutions in Visakhapatnam.

As part of his doctoral work in Canada, Dr. Tatavarti’s research in the area of wave hydrodynamics resulted in the development of analytical models and algorithms for quantifying the frequency dependent wave reflections on natural beaches (and in laboratory wave flumes) which enabled the decomposition of waves into incoming and outgoing waves on a natural (or a laboratory) beach. This work provided insights into near shore hydrodynamics of waves and the first field evidence for the existence of long wave generation by time-varying breaker zone locations (the break point) in the surf zone. The work also has direct relevance to the design and construction of jetties and breakwaters in Coastal, Port and Harbor Engineering (Tatavarti and Huntley, 1987 in the Proc. Canadian Coastal Conference; Tatavarti et al., 1988, in the Proc. ASCE Coastal Engineering Conference; Tatavarti, 1989 in PhD Thesis, Dalhousie University, Canada; Huntley, Simmons and Tatavarti, 1999 in Jl. Port, Coastal and Harbor Engineering).

While working on the various signal processing techniques pertaining to very large ocean data sets, Dr. Tatavarti had demonstrated that the Eigen-value problem is a form of minimum least squared approximation and that the Complex Empirical Orthogonal Function Analyses is a better tool to extract additional insights from oceanic data (Tatavarti and Andrade, 1992 in Jl. Ocean Engineering). Dr. Tatavarti had also participated in many ocean exploratory programs associated with oil and natural gas industry in and outside India, and has expert knowledge in the exploration and exploitation techniques and technologies.

During his tenure at DRDO, Dr. Tatavarti made significant and pioneering breakthroughs in the field of non- acoustic naval surveillance technology. He conceived, built and headed the Centre for Oceanics and Optronics at the Naval Physical & Oceanographic Laboratory in Kochi, and was also the Program Director of many major Defence and civilian programs, which had great significance to the navy and the country’s disaster management programs. Dr. Tatavarti had significantly contributed to the fields of ocean science, engineering and technology through new algorithms, novel monitoring techniques and innovative design and development of highly sensitive opto-electronic systems for studying the dynamics of stratified fluids. The opto-electronic systems developed by Dr. Tatavarti helped in making significant in-roads into understanding of the free and forced motions in stratified fluids and opened new pathways in the field of ocean and atmospheric surveillance technologies and systems for Defence and civilian applications.

Dr. Tatavarti’s research on novel techniques for monitoring stratified fluid dynamics demonstrated that the advances in optoelectronic technology can suitably be adopted for fluid dynamic studies. His monitoring techniques achieved higher sensitivity thus demonstrating the efficacy in employing optoelectronics as a remote sensing tool for monitoring stratified fluid motions. The work thus established new pathways with far reaching implications for both Defence and civilian applications (Tatavarti et al., 1995 in Current Science; Tatavarti et al., 2002 in Proc. ICONS Conference; NPOL-RR-08/2003 in Research Report).   After successfully demonstrating the techniques under laboratory conditions, Dr. Tatavarti developed engineered optoelectronic systems for monitoring stratified fluids with very high sensitivity (Tatavarti, 2009 in Proc. IEEE Conference on Sensors). The systems were deployed in oceans to demonstrate the feasibility of identifying natural and anthropogenic hydrodynamic signatures and the existence of fast moving solitons in both upstream and downstream directions of moving bodies. The systems have various applications and have helped Tatavarti and team in filing for national and international patents.

Addressing the problem of detection and discrimination of spatial features, patterns and objects from space-borne satellite images, Dr. Tatavarti developed a suite of image processing algorithms utilizing concepts from the fields of physics, hydrodynamics, pattern recognition, computer vision and mechanics of motion. The suite of algorithms was successfully tested for its utility in identifying spatial features and objects (ships and submarines) and their manifestations on the ocean surface. This work had significant implications to the Navy and therefore was documented in the form of classified research reports (NPOL-RR-10/2003, NPOL-RR-12/2003; NPOL-RR-47/2007) and in publications (Tatavarti and Sivakumar, 2002 in Proc. ICONS Conference; Tatavarti, 2003 in Proc. UDT Conference). He was also instrumental in developing a decision based algorithm for efficient removal of salt and pepper noise from images (Nair, Revathy and Tatavarti, 2008 in Proc. IEEE CISP Conference) and a fuzzy logic based automatic contrast enhancement method for images from satellites ( Nair, Lakshmanan, Wilscy and Tatavarti, 2009 in Signal Video and Image Processing Journal) and an efficient noise detection algorithm for impulse noise removal in images (Nasimudeen, Nair and Tatavarti, 2010  in Signal Video and Image Processing Journal).

Dr. Tatavarti has also contributed significantly in understanding the unique and complex fluid-mud (mud bank) phenomenon off the Kerala coast, utilizing indigenous sensors and conducting innovative field experiments. This work gave the first field evidence for the existence of strong edge waves, infragravity waves, far infragravity waves, wave reflections, alongshore and cross-shore currents and their interactions with the monsoonal dynamics, thus explaining the formation and sustenance of mud banks (Tatavarti et al., 1996 in Current Science; Kumar, Narayana, and Tatavarti, 1998 in Jl. Geol. Soc. India; Tatavarti et al., 1999 in Current Science; Narayana, Kumar and Tatavarti, 2001 in Coastal and Estuarine Fine Sediment Processes, Elsevier Publication; Tatavarti and Narayana, 2006 in Jl. Coastal Research).

Based on field studies immediately after the December 2004 tsunami, Dr. Tatavarti showed that the sediment deposits on the coast can serve as markers of paleo-tsunamis (Narayana, Tatavarti, Shinu and Subeer, 2007 in Marine Geology). In 2008, working with Department of Space, and the Ministry of Earth Sciences, Dr. Tatavarti developed an optoelectronic system for monitoring tsunamis in the ocean with very high sensitivity (3 to 4 orders of magnitude higher sensitivity than the conventional pressure transducers presently used).

From November 2008 to December 2010, Dr. Tatavarti worked as the Director of Research and a Senior Professor at VIT University, leading the R&D activities of the university having 1100 faculty and 900 research students in his capacity as Director (R&D), and Member of the Board of Management and the Academic Council at VIT University. As Director of Research at one of the top Indian universities, Dr. Tatavarti developed algorithms for pragmatically quantifying the quality of research output from a university in order to enthuse and encourage the university researchers to excel further in their research endeavors (Tatavarti et al., 2010 in Current Science). VIT has conferred the Most Active Researcher Awards on Prof. Tatavarti (2009, 2010).

Since December 2010, Dr. Tatavarti is working as the Director (Consultancy & Research) at Gayatri Engineering College, an autonomous institute affiliated currently to Jawaharlal Nehru Technological University, Kakinada, where he established a state of art photonic research laboratory and an indigenous subsonic wind tunnel facility. In 2010, Prof. Tatavarti had also founded a non- profit think tank, CASTLE; which endeavors to inculcate the spirit of R and D amongst all, and bring together researchers and various stakeholders to address societal problems.

Exploring the fertile domain of biomedical technologies, Prof. Tatavarti’s image processing research - for developing an automated diagnosis of diabetic retinopathy and glaucoma, using Fundus and OCT images – resulted in a benchmark publication garnering a large number of citations by the biomedical and biotechnological research fraternity (Arulmozhivarman, Das, Murthy and Tatavarti, 2012 in J. Lipids in Health and Disease).

Prof. Tatavarti’s advanced work on non-acoustic technologies for detection of surface and sub-surface platforms in ocean, published by high powered committee of Ministry of Defence, Government of India attracted the attention of 1000+ academic and defence scientists / engineers / technologists / researchers from across 87 countries (https://independent.academia.edu/RaoTatavarti/Analytics/activity/overview; Toppaladoddi, Dixit, Tatavarti and Govindarajan, 2011 in Physics of Fluids; Tatavarti et al., 2013 in IDST Journal), including those in the highest echelons of Government of India.

Dr. Tatavarti’s research interests are varied and he has guided Bachelors’ (32), Masters’ (42) and PhD (4) students in various fields of Science and Engineering. In addition, he taught graduate level courses in oceanography/ocean engineering/signal and image processing/ fluid dynamics/optoelectronics/research methodology for graduate students at IIT Madras, Cochin University of Science and Technology, VIT University, University of Hyderabad, GVP College of Engineering, Indian Maritime University, India; Dalhousie University, Canada and University of Georgia, USA. As part of his professional career so far, Dr. Tatavarti headed projects from various governmental agencies having a total financial outlay of more than Rs.500 million, in addition to offering technical consultancy and advice to various industries and organizations. In recognition of Dr. Tatavarti’s contributions, DRDO has conferred on him an award for Advances in Naval Technology (1997), a Silicon Medal (2006), and DRDO Laboratory Award (2007).

Employing novel pedagogical principles (Saripalle, Kumar and Tatavarti, 2014 in Journal of Innovation and Technology Management), Prof. Tatavarti had mentored, taught and guided hundreds of science and engineering students of different disciplines at various institutes worldwide, and successfully facilitated them in securing challenging, well paid jobs in the industry, and or embark on research activities at other internationally reputed institutes. (Ref: http://www.gvpsirc.co.in). Prof. Tatavarti’s penchant to take up work on complex and challenging scientific problems coupled with his out of the box thinking, reaped rich dividends in the form of development of novel photonic technologies to solve pernicious problems related to fast moving fighter aircrafts (for Ministry of Defence, Government of India) and to accurate and cost effective resource assessment for setting up wind power plants (for Ministry of New and Renewable Energy, Government of India). The path breaking technologies were well appreciated by the Government of India.

Using innovative principles encompassing interdisciplinary fields of research, Prof Tatavarti had indigenously developed novel and highly sensitive photonic systems - AUM, PRANEEDHI, SAMIRA, SARATHI, SAVDHAN, TARANI, VAYU, VIDUR, VEDA - for a wide range of Defence and civilian applications, which are now ready for commercialization. In 2015, Prof. Tatavarti started a high end Technology Start-Up Company, CATS Global which is currently endeavoring to push the indigenous technologies and systems worldwide (Ref: http://www.cats-global.com). Judging the importance and potential of CATS technologies, the multinational consortium of AIRBUS had selected CATS Global from among 140+ start-up firms across 7 countries for accelerating the commercialization process (https://www.airbus-bizlab.com/news/airbus-bizlab-bengaluru-starts-third-season-with-six-finalist-start-ups/view) .

Prof. Tatavarti’s succinct, and yet eloquent articulation on the need for indigenous Defence technologies for India (Tatavarti, 2015 in Organizer and Panchajanya) resulted in him becoming a consultant and technical adviser to the then Raksha Mantri. Having varied research interests, Dr. Tatavarti has 182 Scientific and Technical contributions to his credit (163research publications in peer reviewed Journals / Conference Proceedings / Classified Research Reports, 2 Monographs, 1 Book Chapter, 9 Indigenous Systems and 7 Patents - Indian Patent No.1469/DEL/2007, US Patent No. US2010/0321698/A1, European Patent No. EP 2160577 (A2), International Patent filed in African Countries – PCT No. 1469/IN2008/000444, Indian Patent – IPO No. 1819/DEL/2008, Indian Patent No.2567/CHE/2010, Indian Patent No.3597/CHE/2010). In 2017, Prof. Tatavarti was elected Fellow of the Andhra Pradesh Akademi of Sciences for his multifaceted pioneering and path breaking works across many disciplines of Science and Engineering.

Prof. Rao Tatavarti currently having a h-index of 16, and an i10 index of 20, with 700+ citations (Ref: https://scholar.google.co.in/citations?user=soE7Q9MAAAAJ&hl=en); is an active researcher and a keynote speaker at many reputed institutes and scientific and technical gatherings worldwide, in addition to being a reviewer and editor for peer reviewed journals. Prof. Tatavarti travels widely worldwide and actively collaborates in multi-disciplinary research and academic activities with his peers at many internationally reputed institutes.

Subject Matter Expertise

Services

Writing
Research
Consulting
Data & AI
Product Development

Work Experience

Director

Gayatri Vidya Parishad, GVP-SIRC

August 2011 - Present

Senior Professor and Director

GVP College of Engineering

December 2010 - Present

Regional Director

National Maritime Foundation

June 2013 - August 2015

Senior Professor, Dean and Director

VIT University

November 2008 - December 2010

Senior Professor, Dean and Director

VIT University

November 2008 - December 2010

Senior scientist, Programs Director, Additional Director, Head Centre for Oceanics and Optronics

Defence Research and Development Organisation

December 1989 - November 2008

Program Director and Senior Scientist

Defence R&D Organization

December 1989 - November 2008

Research / Teaching Assistant

Dalhousie University

September 1984 - July 1989

Teaching / Research Assistant

Dalhousie University

September 1984 - June 1989

Senior Project Officer

Indian Institute of Technology Madras

May 1983 - September 1984

Senior Project Officer

Indian Institute of Technology Madras

July 1983 - August 1984

Education

PhD

Dalhousie University, Canada

September 1984 - June 1989

M.S

Indian Institute of Technology Madras

June 1981 - June 1983

MSc

Andhra university

August 1978 - September 1980

BSc

Andhra university

July 1975 - July 1978

Certifications

Certification details not provided.

Publications

JOURNAL ARTICLE

Ganesh, S.S., Arulmozhivarman, P., Tatavarti, V.S.N.R.(2018). Air quality index forecasting using artificial neural networks – A case study on Delhi . International Journal of Environment and Waste Management. 22. (1-4). p. 4-23.

S. Sankar Ganesh, P. Arulmozhivarman, V.S.N. Rao Tatavarti(2018). Air quality index forecasting using artificial neural networks - a case study on Delhi . International Journal of Environment and Waste Management. 22. (1/2/3/4). p. 4. Inderscience Publishers

Ganesh, S.S., Arulmozhivarman, P., Tatavarti, V.S.N.R.(2018). Prediction of PM<inf>2.5</inf>using an ensemble of artificial neural networks and regression models . Journal of Ambient Intelligence and Humanized Computing. p. 1-11.

Tatavarti, S.R., Bittner, Z.S., Wibowo, A., Slocum, M.A., Nelson, G., Kum, H., Ahrenkiel, S.P., Hubbard, S.M.(2018). Epitaxial Lift-off (ELO) of InGaP/GaAs/InGaAs solar cells with quantum dots in GaAs middle sub-cell . Solar Energy Materials and Solar Cells. 185. p. 153-157.

V.S.N. Rao Tatavarti, S. Sankar Ganesh, P. Arulmozhivarman(2018). Air quality index forecasting using artificial neural networks - a case study on Delhi . International Journal of Environment and Waste Management. 22. (1/2/3/4). p. 4. Inderscience Publishers

Sankar Ganesh, S., Arulmozhivarman, P., Tatavarti, R.(2017). Forecasting Air Quality Index Using an Ensemble of Artificial Neural Networks and Regression Models . Journal of Intelligent Systems.

Li, X., Li, P.-C., Ji, L., Stender, C., Tatavarti, S.R., Sablon, K., Yu, E.T.(2015). Integration of subwavelength optical nanostructures for improved antireflection performance of mechanically flexible GaAs solar cells fabricated by epitaxial lift-off . Solar Energy Materials and Solar Cells. 143. p. 567-572.

Li, X., Li, P.-C., Ji, L., Stender, C., McPheeters, C., Tatavarti, S.R., Sablon, K., Yu, E.T.(2015). Subwavelength nanostructures integrated with polymer-packaged III-v solar cells for omnidirectional, broad-spectrum improvement of photovoltaic performance . Progress in Photovoltaics: Research and Applications. 23. (10). p. 1398-1405.

Ravi Shankar Saripalle, P. V. Kumar, Rao Tatavarti(2014). Individual Innovation Index (I3): Assessment and Enhancement . International Journal of Innovation and Technology Management. 11. (05). p. 1450036. World Scientific Pub Co Pte Lt

Saripalle, R.S., Kumar, P.V., Tatavarti, R.(2014). Individual innovation index (I<sup>3</sup>): Assessment and enhancement . International Journal of Innovation and Technology Management. 11. (5).

Prabhu Ramanathan, P. Arulmozhivarman, Rao Tatavarti(2013). {OPTIMAL} {DESIGN} {AND} {FABRICATION} {STEPS} {OF} {ELECTRICAL} {CAPACITANCE} {TOMOGRAPHY} {SENSORS} . Instrumentation Science {\&} Technology. 41. (3). p. 301--310. Informa {UK} Limited

Mawst, L.J., Kirch, J.D., Chang, C.-C., Kim, T., Garrod, T., Botez, D., Ruder, S., Kuech, T.F., Earles, T., Tatavarti, R., et al.(2013). InGaAs/AlInAs strain-compensated Superlattices grown on metamorphic buffer layers for low-strain, 3.6 μm-emitting quantum-cascade-laser active regions . Journal of Crystal Growth. 370. p. 230-235.

Trautz, K.M., Jenkins, P.P., Walters, R.J., Scheiman, D., Hoheisel, R., Tatavarti, R., Chan, R., Miyamoto, H., Adams, J.G.J., Elarde, V.C., et al.(2013). Mobile solar power . IEEE Journal of Photovoltaics. 3. (1). p. 535-541.

Tatavarti, R., Arulmozhivarman, P., Kishore, M.P.K., Anil Kumar, J., Sanjay Sarma, O.V., Aparna, T.(2013). Seeing the light - Catching the wind technological advances in optical air data systems . International Journal of Applied Engineering Research. 8. (19 SPEC.ISSUE). p. 2599-2604.

Kim, T.W., Garrod, T.J., Kim, K., Lee, J.J., Lalumondiere, S.D., Sin, Y., Lotshaw, W.T., Moss, S.C., Kuech, T.F., Tatavarti, R., et al.(2012). Narrow band gap (1 eV) InGaAsSbN solar cells grown by metalorganic vapor phase epitaxy . Applied Physics Letters. 100. (12).

Antony Jobin, Madhu S. Nair, Rao Tatavarti(2012). Plant Identification based on Fractal Refinement Technique ({FRT}) . Procedia Technology. 6. p. 171--179. Elsevier {BV}

Arulmozhivarman Pachiyappan, Undurti N Das, Tatavarti VSP Murthy, Rao Tatavarti(2012). Automated diagnosis of diabetic retinopathy and glaucoma using fundus and {OCT} images . Lipids in Health and Disease. 11. (1). p. 73. Springer Nature

Nasimudeen, A., Nair, M.S., Tatavarti, R.(2012). Directional switching median filter using boundary discriminative noise detection by elimination . Signal, Image and Video Processing. 6. (4). p. 613-624.

Lu, H.F., Fu, L., Jolley, G., Tan, H.H., Tatavarti, S.R., Jagadish, C.(2011). Temperature dependence of dark current properties of InGaAs/GaAs quantum dot solar cells . Applied Physics Letters. 98. (18).

Nair, M.S., Lakshmanan, R., Wilscy, M., Tatavarti, R.(2011). Fuzzy logic-based automatic contrast enhancement of satellite images of ocean . Signal, Image and Video Processing. 5. (1). p. 69-80.

Prabhu, K.R., Sudha, R., Arulmozhi Varman, V., Tatavarti, R.(2011). Introduction to Electrical Capacitance Tomography and its measurement circuitry . International Journal of Applied Engineering Research. 6. (12). p. 1521-1525.

Toppaladoddi, S., Dixit, H.N., Tatavarti, R., Govindarajan, R.(2011). Vortex shedding patterns, their competition, and chaos in flow past inline oscillating rectangular cylinders . Physics of Fluids. 23. (7).

Arun, R., Nair, M.S., Vrinthavani, R., Tatavarti, R.(2011). An alpha rooting based Hybrid Technique for image enhancement . Engineering Letters. 19. (3). p. 159-168.

Madhu S. Nair, Rekha Lakshmanan, M. Wilscy, Rao Tatavarti(2011). Satellite image processing for oceanic applications using fuzzy logic . International Journal of Intelligent Systems Technologies and Applications. 10. (3). p. 289. Inderscience Publishers

Lakshmanan, R., Nair, M.S., Wilscy, M., Tatavarti, R.(2010). Automatic contrast enhancement using Selective Grey-Level Grouping . International Journal of Signal and Imaging Systems Engineering. 3. (2). p. 126-135.

Rekha Lakshmanan, Madhu S. Nair, M. Wilscy, Rao Tatavarti(2010). Automatic contrast enhancement using Selective Grey-Level Grouping . International Journal of Signal and Imaging Systems Engineering. 3. (2). p. 126. Inderscience Publishers

Narayana, A.C., Jago, C.F., Manojkumar, P., Tatavarti, R.(2008). Nearshore sediment characteristics and formation of mudbanks along the Kerala coast, southwest India . Estuarine, Coastal and Shelf Science. 78. (2). p. 341-352.

Narayana, A.C., Tatavarti, R., Shinu, N., Subeer, A.(2007). Tsunami of December 26, 2004 on the southwest coast of India: Post-tsunami geomorphic and sediment characteristics . Marine Geology. 242. (1-3). p. 155-168.

Tatavarti, R., Narayana, A.C.(2006). Hydrodynamics in a mud bank regime during nonmonsoon and monsoon seasons . Journal of Coastal Research. 22. (6). p. 1463-1473.

Narayana, A.C., Tatavarti, R., Shakdwipe, M.(2005). Tsunami of 26 December 2004: Observations on Kerala Coast . Journal of the Geological Society of India. 65. (2). p. 239-246.

Narayana, A.C., Tatavarti, R.(2005). High wave activity on the Kerala coast . Journal of the Geological Society of India. 66. (2). p. 249-250.

Zheng, L., Zhang, X., Zeng, Y., Tatavarti, S.R., Watkins, S.P., Bolognesi, C.R., Demiguel, S., Campbell, J.C.(2005). Demonstration of high-speed staggered lineup GaAsSb-InP unitraveling carrier photodiodes . IEEE Photonics Technology Letters. 17. (3). p. 651-653.

David A. Huntley, David Simmonds, Rao Tatavarti(1999). Use of Collocated Sensors to Measure Coastal Wave Reflection. Journal of Waterway, Port, Coastal, and Ocean Engineering. 125. (1). p. 46--52. American Society of Civil Engineers ({ASCE})

Tatavarti, R., Narayana, A.C., Manoj Kumar, P., Chand, S.(1999). Mudbank regime off the Kerala coast during monsoon and non-monsoon seasons . Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences. 108. (1). p. 57-68.

Huntley, D.A., Simmonds, D., Tatavarti, R.(1999). Use of collocated sensors to measure coastal wave reflection. Journal of Waterway, Port, Coastal and Ocean Engineering. 125. (1). p. 46-52.

Tatavarti, R., Narayana, A.C., Ravishankar, M., Manoj Kumar, P.(1996). Mudbank dynamics: Field evidence of edge waves and far infra-gravity waves . Current Science. 70. (9). p. 837-843.

Ananth, P.N., Tatavarti, R.V.S.N., Swain, J., Rao, C.V.K.P.(1993). Observations of sea and swell using directional wave buoy . Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences. 102. (2). p. 351-366.

Tatavarti, R., Andrade, Y.(1992). The eigenvalue problem as a form of minimum least-squared approximation . Ocean Engineering. 19. (6). p. 511-526.

CONFERENCE PAPER

Smith, B.L., Slocum, M.A., Bittner, Z.S., Dai, Y., Nelson, G.T., Hellstroem, S.D., Tatavarti, R., Hubbard, S.M.(2018). Inverted growth evaluation for epitaxial lift off (ELO) quantum dot solar cell and enhanced absorption by back surface texturing . 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. p. 1-6.

Bittner, Z.S., Slocum, M.A., Nelson, G.T., Tatavarti, R., Hubbard, S.M.(2018). Novel InAs/GaAs QD subcell design for radiation hard 3-J ELO IMM solar cell . 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. p. 1-4.

Slocum, M.A., Nelson, G., Hellstrom, S., Smith, B., Wibowo, A., Tatavarti, R., Hubbard, S.M.(2018). Growth of InAs quantum dots in a metamorphic InGaAs bottom cell of an inverse metamorphic solar cell . 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. p. 1-4.

Welser, R.E., Sood, A.K., Tatavarti, S.R., Wibowo, A., Wilt, D.M.(2016). Impact of Layer Number on Flexible High-Voltage Nanostructured Solar Cells . MRS Advances. 1. (14). p. 891-899.

Smith, B.L., Slocum, M.A., Bittner, Z.S., Dai, Y., Nelson, G.T., Hellstroem, S.D., Tatavarti, R., Hubbard, S.M.(2016). Inverted growth evaluation for epitaxial lift off (ELO) quantum dot solar cell and enhanced absorption by back surface texturing . Conference Record of the IEEE Photovoltaic Specialists Conference. 2016-November. p. 1276-1281.

Sin, Y., Peterson, M., Lingley, Z., Lalumondiere, S., Moss, S.C., Kim, H., Forghani, K., Guan, Y., Kim, K., Lee, J., et al.(2016). Carrier dynamics in QW and bulk bismide and epitaxial lift off GaAs-In(Al)GaP double heterostructures grown by MOVPE for multi-junction solar cells . Proceedings of SPIE - The International Society for Optical Engineering. 9743.

Slocum, M.A., Nelson, G., Hellstrom, S., Smith, B., Wibowo, A., Tatavarti, R., Hubbard, S.M.(2016). Growth of InAs quantum dots in a metamorphic InGaAs bottom cell of an inverse metamorphic solar cell . Conference Record of the IEEE Photovoltaic Specialists Conference. 2016-November. p. 2111-2114.

Bittner, Z.S., Slocum, M.A., Nelson, G.T., Tatavarti, R., Hubbard, S.M.(2016). Novel InAs/GaAs QD subcell design for radiation hard 3-J ELO IMM solar cell . Conference Record of the IEEE Photovoltaic Specialists Conference. 2016-November. p. 3421-3424.

M Bharaneswari, P Arulmozhivarman, Rao Tatavarti, K Senthilnathan(2015). Speckle noise suppression in {SAR} images (Oil spill images) using wavelet based methods and {ICA} technique . {IEEE}

Stender, C.L., Adams, J., Elarde, V., Major, T., Miyamoto, H., Osowski, M., Pan, N., Tatavarti, R., Tuminello, F., Wibowo, A., et al.(2015). Flexible and lightweight epitaxial lift-off GaAs multi-junction solar cells for portable power and UAV applications . 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015.

Elarde, V.C., Miyamoto, H., Chan, R., Stender, C., Youtsey, C., Adams, J., Wibowo, A., Tatavarti, R., Osowski, M., Pan, N.(2015). Fabrication and applications of high-efficiency, lightweight, multi-junction solar cells by epitaxial liftoff . ECS Transactions. 66. (7). p. 89-93.

Welser, R.E., Sood, A.K., Tatavarti, S.R., Wibowo, A., Wilt, D.M., Howard, A.(2015). Radiative dark current in optically thin III-V photovoltaic devices . Proceedings of SPIE - The International Society for Optical Engineering. 9358.

Bharaneswari, M., Arulmozhivarman, P., Tatavarti, R., Senthilnathan, K.(2015). Speckle noise suppression in SAR images (Oil spill images) using wavelet based methods and ICA technique . 2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems, SPICES 2015.

Scheiman, D., Jenkins, P., Walters, R., Trautz, K., Hoheisel, R., Tatavarti, R., Chan, R., Miyamoto, H., Adams, J., Elarde, V., et al.(2014). High efficiency flexible triple junction solar panels . 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. p. 1376-1380.

Li, X., Li, P.-C., Ji, L., Hu, D., Schaadt, D.M., Stender, C., McPheeters, C., Tatavarti, R., Sablon, K., Yu, E.T.(2014). Integrated optical nanostructures for wide-angle antireflection and light trapping in III/V solar cells . 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. p. 2238-2242.

Stender, C.L., Youtsey, C., Tuminello, F., Osowski, M., Adams, J., Elarde, V., Miyamoto, H., Wibowo, A., Hillier, G., Tatavarti, R., et al.(2014). S4-P8: Applications for epitaxial lift-off of III-V materials . Lester Eastman Conference 2014 - High Performance Devices, LEC 2014.

Tatavarti, R., Ban, K.-Y., Wibowo, A., Kuciauskas, D., Guthrey, H., Jones, K., Johnston, S., Norman, A., Levi, D., Al-Jassim, M.(2014). Minority carrier lifetimes in 1.0-eV p-In<inf>0.27</inf>Ga<inf>0.73</inf>As layers grown on GaAs substrates . 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. p. 3414-3416.

Welser, R.E., Pethuraja, G.G., Zeller, J.W., Sood, A.K., Sablon, K.A., Tatavarti, S.R., Dhar, N.K.(2014). High-voltage thin-absorber photovoltaic device structures for efficient energy harvesting . Proceedings of SPIE - The International Society for Optical Engineering. 9115.

Trautz, K., Jenkins, P., Walters, R., Scheiman, D., Hoheisel, R., Tatavarti, R., Chan, R., Miyamoto, H., Adams, J., Elarde, V., et al.(2013). High efficiency flexible solar panels . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 115-119.

Mawst, L.J., Kim, T.W., Garrod, T.J., Kuech, T.F., Kim, K., Lee, J.J., Lalumondiere, S.D., Sin, Y., Lotshaw, W.T., Moss, S.C., et al.(2013). Properties of dilute-nitride-antimonide materials grown by metalorganic vapor phase epitaxy (MOVPE) for solar cell application . Asia Communications and Photonics Conference, ACP.

Sablon, K.A., Heier, J., Tatavarti, S.R., Olson, D.C., Kippelen, B., Fu, L., Brabec, C.J., Wang, Z., Nüesch, F.A.(2013). Preface . Materials Research Society Symposium Proceedings. 1493.

Tatavarti, R., Arulmozhivarman P., Anil Kumar J., Shanmukha Rao S., Aparna T.(2013). Optoelectronic sensor on moving platforms for monitoring environmental parameters . Optics InfoBase Conference Papers.

Bennett, M.F., Bittner, Z.S., Forbes, D.V., Tatavarti, R., Wibowo, A., Pan, N., Chern, K., Hubbard, S.M.(2013). Alpha radiation effects on n-i-p quantum dot epitaxial lift-off solar cells . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 2784-2789.

Rao Tatavarti, Arulmozhivarman Pachiyappan, Anil Jakkam, Shanmuka Rao S, Tatavarti Aparna(2013). Optoelectronic Sensor on Moving Platforms for Monitoring Environmental Parameters . {OSA}

Sin, Y., LaLumondiere, S., Lotshaw, W., Moss, S.C., Kim, T.W., Forghani, K., Mawst, L.J., Kuech, T.F., Tatavarti, R., Wibowo, A., et al.(2013). Carrier dynamics in bulk 1eV InGaAsNSb materials and epitaxial lift off GaAs-InAlGaP layers grown by MOVPE for multi-junction solar cells . Proceedings of SPIE - The International Society for Optical Engineering. 8620.

Arulmozhivarman, P., Reddy, G.R., Tatavarti, R.(2013). Low cost EEG signal acquisition system . ISSNIP Biosignals and Biorobotics Conference, BRC.

Sudha Ramasamy, Hrishikesh Vivek Pradhan, Prabhu Ramanathan, P. Arulmozhivarman, Rao Tatavarti(2012). A novel and pedagogical approach to teach {PID} controller with {LabVIEW} signal express . {IEEE}

Trautz, K.M., Jenkins, P.P., Walters, R.J., Scheiman, D., Hoheisel, R., Tatavarti, R., Chan, R., Miyamoto, H., Adams, J.G.J., Elarde, V.C., et al.(2012). Mobile solar power . Conference Record of the IEEE Photovoltaic Specialists Conference. (PART 2).

Youtsey, C., Adams, J., Chan, R., Elarde, V., Hillier, G., Osowski, M., McCallum, D., Miyamoto, H., Pan, N., Stender, C., et al.(2012). Epitaxial lift-off of large-area GaAs thin-film multi-junction solar cells . 2012 International Conference on Compound Semiconductor Manufacturing Technology, CS MANTECH 2012.

Ramasamy, S., Pradhan, H.V., Ramanathan, P., Arulmozhivarman, P., Tatavarti, R.(2012). A novel and pedagogical approach to teach PID controller with LabVIEW signal express . AICERA 2012 - Annual International Conference on Emerging Research Areas: Innovative Practices and Future Trends.

Mawst, L.J., Dudley, P., Kirch, J., Kim, T., Ruder, S., Kuech, T.F., Tatavarti, R.(2011). Metamorphic solar cells employing chemical mechanical polishing and MOVPE regrowth . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 000517-000520.

Tatavarti, R., Wibowo, A., Elarde, V., Tuminello, F., Pastor, R., Giannopoulos, T., Osowski, M., Chan, R., Youtsey, C., Hillier, G., et al.(2011). Large-area, epitaxial lift-off, inverted metamorphic solar cells . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 001941-001944.

Jolley, G., Lu, H.F., Fu, L., Tan, H.H., Tatavarti, S.R., Jagadish, C.(2011). The influence of InGaAs quantum dots on GaAs P-I-N solar cell dark current properties . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 000513-000516.

Tatavarti, R., Wibowo, A., Martin, G., Tuminello, F., Youtsey, C., Hillier, G., Pan, N., Wanlass, M.W., Romero, M.(2010). InGaP/GaAs/InGaAs inverted metamorphic (IMM) solar cells on 4'' epitaxial lifted off (ELO) wafers . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 2125-2128.

Lu, H.F., Fu, L., Jolley, G., Tan, H.H., Tatavarti, S.R., Jagadish, C.(2010). Temperature dependence of dark current properties of In-GaAs/GaAs quantum dot solar cells . Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD. p. 127-128.

A.S Guru Prasad, S Asokan, Rao Tatavarti(2009). Detection of tsunami wave generation and propagation using Fiber Bragg Grating sensors . {IEEE}

Tatavarti, R., Hillier, G., Martin, G., Wibowo, A., Navaratnarajah, R., Tuminello, F., Hertkorn, D., Disabb, M., Youtsey, C., McCallum, D., et al.(2009). Lightweight, low cost InGaP/GaAs dual-junction solar cells on 100 mm epitaxial liftoff (ELO) wafers . Conference Record of the IEEE Photovoltaic Specialists Conference. p. 002065-002067.

Tatavarti, R., Hillier, G., Youtsey, C., McCallum, D., Martin, G., Wibowo, A., Navaratnarajah, R., Tuminello, F., Hertkorn, D., Disabb, M., et al.(2009). Lightweight, low-cost InGaP/GaAs dual-junction solar cells on 4" epitaxial liftoff (ELO) wafers . Proceedings of SPIE - The International Society for Optical Engineering. 7407.

Guru Prasad, A.S., Asokan, S., Tatavarti, R.(2009). Detection of tsunami wave generation and propagation using fiber bragg grating sensors . Proceedings of IEEE Sensors. p. 1278-1281.

Rekha Lakshmanan, Madhu S. Nair, M. Wilscy, Rao Tatavarti(2008). Automatic Contrast Enhancement for Low Contrast Images: A Comparison of Recent Histogram Based Techniques . {IEEE}

Nair, M.S., Revathy, K., Tatavarti, R.(2008). An improved decision-based algorithm for impulse noise removal . Proceedings - 1st International Congress on Image and Signal Processing, CISP 2008. 1. p. 426-431.

Madhu S. Nair, K. Revathy, Rao Tatavarti(2008). An Improved Decision-Based Algorithm for Impulse Noise Removal . {IEEE}

Lakshmanan, R., Nair, M.S., Wilscy, M., Tatavarti, R.(2008). Automatic contrast enhancement for low contrast images: A comparison of recent histogram based techniques . Proceedings of the International Conference on Computer Science and Information Technology, ICCSIT 2008. p. 269-276.

Tatavarti, R., Hillier, G., Dzankovic, A., Martin, G., Tuminello, F., Navaratnarajah, R., Du, G., Vu, D.P., Pan, N.(2008). Lightweight, low cost GaAs solar cells on 4″ epitaxial liftoff (ELO) wafers . Conference Record of the IEEE Photovoltaic Specialists Conference.

Hillier, G., Navaratnarajah, R., Dzankovic, A., Du, G., Tatavarti, R., Pan, N.(2007). Strained in<inf>1-x</inf>Ga<inf>x</inf>P/GaAsSb DHBT . Conference Proceedings - International Conference on Indium Phosphide and Related Materials. p. 417-419.

Zheng, L., Zhang, X., Zeng, Y., Tatavarti, S.R., Watkins, S.P., Bolognesi, C.K., Demiguel, S., Campbell, J.C.(2005). Demonstration of high-speed (AL,GA)AS<inf>0.51</inf>SB<inf>0.49</inf>/INP type-II UNI-traveling carrier photodiodes for 1.55μM operation . Conference Proceedings - International Conference on Indium Phosphide and Related Materials. 2005. p. 144-147.

Rao V. S. N. Tatavarti, David A. Huntley, Anthony J. Bowen(1989). Incoming and Outgoing Wave Interactions on Beaches . American Society of Civil Engineers

Tatavarti, Rao V.S.N., Huntley, David A., Bowen, Anthony J.(1988). Incoming and outgoing wave interactions on beaches . 136-150

OTHER

Ramanathan, P., Ramasamy, S., Jain, P., Nagrecha, H., Paul, S., Arulmozhivarman, P., Tatavarti, R.(2013). Low value capacitance measurements for capacitive sensors - a review . Sensors and Transducers. 148. (1). p. 1-10.

BOOK

Anand, T.V., Nair, M.S., Tatavarti, R.(2012). Detection of straight lines using Rule Directed Pixel Comparison (RDPC) method . Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 7135 LNCS. p. 125-134.

Narayana, A.C., Manojkumar, P., Tatavarti, R.(2000). Beach dynamics related to the Ambalapuzha mudbank along the southwest coast of India . Proceedings in Marine Science. 3. (C). p. 495-507.