Search Results - "Karthikeyan, L."

Multi-layer high-resolution soil moisture estimation using machine learning over the United States by Karthikeyan, L., Mishra, Ashok K.

“…The lack of proper understanding of multi-layer soil moisture (SM) profile (signals) remains a persistent challenge in sustainable agricultural water…”
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A review of remote sensing applications in agriculture for food security: Crop growth and yield, irrigation, and crop losses by Karthikeyan, L., Chawla, Ila, Mishra, Ashok K.

“…•Review the remote sensing application for food security.•Aspects of crop growth, irrigation, and crop losses are considered.•Crop growth: crop yield and LAI…”
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Understanding tropical cyclone persistence over land: a case study of cyclone Gulab by Navale, Ashish, Karthikeyan, L

“…Abstract Tropical cyclone (TC) Gulab originated in the Bay of Bengal during the post-monsoon season of 2021. Following an unusual westward trajectory, TC Gulab…”
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Understanding Recycled Precipitation at Different Spatio‐Temporal Scales Over India: An Eulerian Water Tagging Approach by Navale, Ashish, Karthikeyan, L.

“…Land evapotranspiration has a notable impact on the continental precipitation of India during monsoons. Given the heterogeneous land use and climate, India…”
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Soil moisture–precipitation feedbacks in pre‐ and post‐monsoon landfalling tropical cyclones in Bay of Bengal by Navale, Ashish, Karthikeyan, L

“…The Bay of Bengal (BoB) experiences an average of three to four tropical cyclones (TCs) annually. The high population density of surrounding countries often…”
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Four decades of microwave satellite soil moisture observations: Part 1. A review of retrieval algorithms by Karthikeyan, L., Pan, Ming, Wanders, Niko, Kumar, D. Nagesh, Wood, Eric F.

“…•Review of developments of microwave soil moisture retrieval algorithms.•Passive and active microwave soil moisture retrieval algorithms are…”
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Role of Initial Conditions and Meteorological Drought in Soil Moisture Drought Propagation: An Event‐Based Causal Analysis Over South Asia by Gupta, Amitesh, Karthikeyan, L.

“…The role of meteorological droughts and initial conditions (land and atmosphere) in soil moisture drought (SMD) propagation are not yet fully understood. This…”
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Predictability of nonstationary time series using wavelet and EMD based ARMA models by Karthikeyan, L., Nagesh Kumar, D.

“…•Comparison of performance between wavelet and EMD based time series analysis.•Predictability of models at larger time steps ahead forecasts.•Discussion over…”
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Enhancing diesel engine performance and emissions control: The role of RuO2 nanoparticles and ammonia additives with microalgae blends by Manimaran, Sangeetha, Selvakumaran, T., Alharbi, Sulaiman Ali, Karthikeyan, L, Dhanalakshmi, K.

“…•Addition of RuO2 nanoparticles increases BTE in biodiesel blends, with the highest improvement in B20R100.•Nanoparticles lowered BSFC, indicating enhanced…”
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Four decades of microwave satellite soil moisture observations: Part 2. Product validation and inter-satellite comparisons by Karthikeyan, L., Pan, Ming, Wanders, Niko, Kumar, D. Nagesh, Wood, Eric F.

“…•Review of evolution of sensors and accuracy of microwave soil moisture retrievals.•Eight passive and two active soil moisture products are validated over the…”
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Soil moisture retrieval over croplands using dual-pol L-band GRD SAR data by Bhogapurapu, Narayanarao, Dey, Subhadip, Mandal, Dipankar, Bhattacharya, Avik, Karthikeyan, L., McNairn, Heather, Rao, Y.S.

“…Vegetation cover significantly influences the hydrometeorological processes of land surfaces. The heterogeneity of vegetation cover makes these processes more…”
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Hysteresis in seasonal land-atmospheric interactions over India and its characteristics across croplands and forests by Khandare, Ajinkya, Murtugudde, Raghu, Karthikeyan, L, Ghosh, Subimal

“…Abstract Satellite-derived vegetation optical depth and soil moisture (SM) data reveal the critical role of the soil-vegetation continuum in storing rainwater…”
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Machine learning based predictive modelling of micro gas turbine engine fuelled with microalgae blends on using LSTM networks: An experimental approach by Liu, Yuchen, Meenakshi, V., Karthikeyan, L., Maroušek, Josef, Krishnamoorthy, NR, Sekar, Manigandan, Nasif, Omaima, Ali Alharbi, Sulaiman, Wu, Yingji, Xia, Changlei

“…•Impact of the microalgae blends (20% and 30%) on the micro gas turbine were analysed.•The blends of microalgae were tested with Jet-A under the static…”
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Simultaneous retrieval of global scale Vegetation Optical Depth, surface roughness, and soil moisture using X-band AMSR-E observations by Karthikeyan, L., Pan, Ming, Konings, Alexandra G., Piles, María, Fernandez-Moran, Roberto, Nagesh Kumar, D., Wood, Eric F.

“…The radiative transfer scheme implemented for the retrieval of soil moisture from passive microwaves is a function of scattering, polarization mixing and…”
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Microwave assisted synthesis of ZnO and Pd-ZnO nanospheres for UV photodetector by L, Karthikeyan, M V, Akshaya, Basu, Palash Kumar

“…•A novel ZnO/Pd-ZnO nanomaterial synthesised by microwave assisted technique (Simple low temperature process solution route) and validation of the device…”
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SALDEFT: Self-Adaptive Learning Differential Evolution Based Optimal Physical Machine Selection for Fault Tolerance Problem in Cloud by Karthikeyan, L., Vijayakumaran, C., Chitra, S., Arumugam, Samydurai

“…In recent years, cloud computing plays a significant role in offering several applications with high-level reliability, availability, and security as well as…”
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Relationship between process parameters and mechanical properties of friction stir processed AA6063-T6 aluminum alloy by Karthikeyan, L., Senthil Kumar, V.S.

“…► Experimental results of FSP AA6063-T6 alloy are presented. ► A mathematical model was developed to predict the mechanical properties post FSP. ► The model…”
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A novel approach to validate satellite soil moisture retrievals using precipitation data by Karthikeyan, L., Kumar, D. Nagesh

“…A novel approach is proposed that attempts to validate passive microwave soil moisture retrievals using precipitation data (applied over India). It is based on…”
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On the role of process variables in the friction stir processing of cast aluminum A319 alloy by Karthikeyan, L., Senthilkumar, V.S., Padmanabhan, K.A.

“…The surfaces of cast A319 alloy plates of nominal composition (wt.%): Al – 5.2 Si – 2.51 Cu were subjected to single stir Friction Stir Processing (FSP) with a…”
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Mechanical property and microstructural changes during friction stir processing of cast aluminum 2285 alloy by Karthikeyan, L., Senthilkumar, V.S., Balasubramanian, V., Natarajan, S.

“…Friction stir processing (FSP) is an emerging surface engineering technology that can eliminate casting defects locally by refining microstructures, thereby…”
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