Ayan Chakraborty
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View article: Geospatial Assessment of LULC Dynamics and Land Surface Temperature Variations in KMA (2008–2024) Using Multi-source Satellite Data and Predictive Modeling
Geospatial Assessment of LULC Dynamics and Land Surface Temperature Variations in KMA (2008–2024) Using Multi-source Satellite Data and Predictive Modeling Open
Concept: Rapid urbanization in the Kolkata Metropolitan Area (KMA) has significantly altered land use and surface temperature. This necessitates a geospatial investigation to understand long-term environmental impacts. Objectives: To analy…
View article: Seroprevalence of scrub typhus among patients with acute febrile illness: A study from northern districts of West Bengal
Seroprevalence of scrub typhus among patients with acute febrile illness: A study from northern districts of West Bengal Open
A BSTRACT Background: Scrub typhus is a re-emerging acute febrile illness with a high case fatality rate. Early clinical features are nonspecific and resemble any acute febrile illness, with or without skin rash creating clinical dilemmas.…
View article: Spatio-Temporal Dynamics of LULC in the Kolkata Metropolitan Area (2016–2024): Insights from Landsat and MODIS Geospatial Data
Spatio-Temporal Dynamics of LULC in the Kolkata Metropolitan Area (2016–2024): Insights from Landsat and MODIS Geospatial Data Open
Aims: This study explores the dynamics of Land Use and Land Cover (LULC) and their thermal impacts within the Kolkata Metropolitan Area (KMA) from 2016 to 2024, utilizing data from Landsat 8 and MODIS. LULC maps generated through Support V…
View article: Nonminimal infrared gravitational reheating in light of ACT observation
Nonminimal infrared gravitational reheating in light of ACT observation Open
Inflation is known to produce large infrared scalar fluctuations. Further, if a scalar field $(χ)$ is non-minimally coupled with gravity through $ξχ^2 R$, those infrared modes experience \textit{tachyonic instability} during and after infl…
View article: Constraining Reheating Temperature, Inflaton-SM Coupling and Dark Matter Mass in Light of ACT DR6 Observations
Constraining Reheating Temperature, Inflaton-SM Coupling and Dark Matter Mass in Light of ACT DR6 Observations Open
We explore the phenomenological implications of the latest Atacama Cosmology Telescope (ACT) DR6 observations, in combination with Planck 2018, BICEP/Keck 2018, and DESI, on the physics of inflation and post-inflationary reheating. We focu…
View article: Unveiling the mechanism of amelioration of adjuvant-induced rheumatoid arthritis by Drynaria quercifolia rhizome extract using network pharmacology and gene expression-based studies
Unveiling the mechanism of amelioration of adjuvant-induced rheumatoid arthritis by Drynaria quercifolia rhizome extract using network pharmacology and gene expression-based studies Open
Rhizomes of Drynaria quercifolia have long been traditionally used to manage rheumatic pain. However, there is limited research supporting this traditional practice and insufficient evidence demonstrating the molecular mechanisms of action…
View article: Generalizing the Bogoliubov vs Boltzmann approaches in gravitational production
Generalizing the Bogoliubov vs Boltzmann approaches in gravitational production Open
We investigate the spectral behavior of scalar fluctuations generated by gravity during inflation and the subsequent reheating phase. We consider a non-perturbative Bogoliubov treatment within the context of pure gravitational reheating. W…
View article: Equisetum diffusum whole plant methanol extract attenuates rheumatoid arthritis by modulating the expression of key inflammatory biomarkers in rat models
Equisetum diffusum whole plant methanol extract attenuates rheumatoid arthritis by modulating the expression of key inflammatory biomarkers in rat models Open
Rheumatoid arthritis (RA) is a chronic inflammatory disease associated with subsequent damage to the bone joints with a global incidence rate of 0.5-1%. To combat with RA various commercially available anti-inflammatory drugs like non-ster…
View article: Multigoal-oriented dual-weighted-residual error estimation using PINNs
Multigoal-oriented dual-weighted-residual error estimation using PINNs Open
Deep learning has shown successful application in visual recognition and certain artificial intelligence tasks. It is mainly considered as a powerful tool with high flexibility to approximate functions. This paper proposes a generalized NU…
View article: Haematological parameters as predictors of severe dengue: A study from northern districts of West Bengal, India
Haematological parameters as predictors of severe dengue: A study from northern districts of West Bengal, India Open
Background & objectives: A hike in dengue cases was recorded in last two years, resulting from both single and multiple-serotypes of dengue virus (DENV) and secondary infections, culminating in significant hospitalizations and deaths in In…
View article: Evaluation of government sector blood banking system of a rural area of West Bengal, India
Evaluation of government sector blood banking system of a rural area of West Bengal, India Open
Background: Blood transfusion service (BTS) is a vital part of health care services. Studies have documented various problems faced by the Indian BTS. A comprehensive assessment blood banking system will serve as a baseline for improvement…
View article: Assessment of Wet Wipes and their Environmental Significance – A Review Article
Assessment of Wet Wipes and their Environmental Significance – A Review Article Open
Nowadays, wet wipes are highly common in the cosmetics market. Also called moist tissues. Its primary function is cleaning. It is a fantastic substitute for traveling with water, soap, and a towel. Wipes are currently a non-woven material …
View article: Squeezing, Chaos and Thermalization in Periodically Driven Quantum Systems: The Case of Bosonic Preheating
Squeezing, Chaos and Thermalization in Periodically Driven Quantum Systems: The Case of Bosonic Preheating Open
The phenomena of Squeezing and chaos have recently been studied in the context of inflation. We apply this formalism in the post-inflationary preheating phase. During this phase, inflaton field undergoes quasi-periodic oscillation, which a…
View article: Domain decomposition deep energy method for phase field analysis in brittle fracture
Domain decomposition deep energy method for phase field analysis in brittle fracture Open
Machine learning techniques have been increasingly used for modeling of engineering problems.In particular, physics informed neural networks (PINNs) have been shown to be a promising approach for discretizing and solving partial differenti…
View article: A Kalman Filter based Low Complexity Throughput Prediction Algorithm for 5G Cellular Networks
A Kalman Filter based Low Complexity Throughput Prediction Algorithm for 5G Cellular Networks Open
Throughput Prediction is one of the primary preconditions for the uninterrupted operation of several network-aware mobile applications, namely video streaming. Recent works have advocated using Machine Learning (ML) and Deep Learning (DL) …
View article: Probabilistic Boolean Operation in Networks of Spiking Neurons for Bayesian Inference of Hidden Markov Models
Probabilistic Boolean Operation in Networks of Spiking Neurons for Bayesian Inference of Hidden Markov Models Open
Spiking neural networks (SNN) have gained popularity among the researchers for low power consumption. An interesting problem on Bayesian inference of hidden Markov models (HMM) on SNN paradigm is timely. In this work we propose a novel app…
View article: Probabilistic Boolean Operation in Networks of Spiking Neurons for Bayesian Inference of Hidden Markov Models
Probabilistic Boolean Operation in Networks of Spiking Neurons for Bayesian Inference of Hidden Markov Models Open
Spiking neural networks (SNN) have gained popularity among the researchers for low power consumption. An interesting problem on Bayesian inference of hidden Markov models (HMM) on SNN paradigm is timely. In this work we propose a novel app…
View article: Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data
Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data Open
We are in the era of precision cosmology which offers us a unique opportunity to investigate beyond standard model physics. Toward this endeavor, inflaton is assumed to be a perfect new physics candidate. In this submission, we explore the…
View article: Variational energy based XPINNs for phase field analysis in brittle fracture
Variational energy based XPINNs for phase field analysis in brittle fracture Open
Modeling fracture is computationally expensive even in computational simulations of two-dimensional problems. Hence, scaling up the available approaches to be directly applied to large components or systems crucial for real applications be…
View article: Integrating Neural Network for Pest Detection in Controlled Environment Vertical Farm
Integrating Neural Network for Pest Detection in Controlled Environment Vertical Farm Open
Background: An integrated system for creating and maintaining controlled environment ideal for vertical farming prototype is demonstrated. The requirement of optimal artificial light for different growth stages of tomato and chilli plants …
View article: CCDC 2088610: Experimental Crystal Structure Determination
CCDC 2088610: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2088611: Experimental Crystal Structure Determination
CCDC 2088611: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Multigoal-oriented dual-weighted-residual error estimation using deep neural networks
Multigoal-oriented dual-weighted-residual error estimation using deep neural networks Open
Deep learning has shown successful application in visual recognition and certain artificial intelligence tasks. Deep learning is also considered as a powerful tool with high flexibility to approximate functions. In the present work, functi…
View article: Physical Therapy for Neurodegenerative Diseases: An Educational Approach
Physical Therapy for Neurodegenerative Diseases: An Educational Approach Open
The most progressive neurodegenerative disease so far we know are Alzheimer’s disease (AD) and Parkinson’s disease (PD). They manifest cognitive and motor disorders, respectively. No cures are found yet for both the diseases, except some p…
View article: Synthesis of Feedback Controller for Nonlinear Control Systems with Optimal Region of Attraction
Synthesis of Feedback Controller for Nonlinear Control Systems with Optimal Region of Attraction Open
We propose a framework for synthesizing a feedback control policy that maximizes the region of attraction (ROA) of a closed-loop nonlinear dynamical system. Our synthesis technique relies on stochastic optimization, which involves computat…
View article: Chelation Therapy Using Static Magnetic Field
Chelation Therapy Using Static Magnetic Field Open
Static magnetic field (SMF) is reported to mimic chelation agents. In thalassemia blood, SMF minimizes iron overloading effect. In such cells ROS level is reduced, in presence of moderate strength (70mT). Pilot study on transfusion depende…
View article: Non uniform weighted extended B-Spline finite element analysis of non linear elliptic partial differential equations
Non uniform weighted extended B-Spline finite element analysis of non linear elliptic partial differential equations Open
We propose a non uniform web spline based finite element analysis for elliptic partial differential equation with the gradient type nonlinearity in their principal coefficients like p-laplacian equation and Quasi-Newtonian fluid flow equat…
View article: Weighted Extended B-Spline Finite Element Analysis of a coupled system of general Elliptic equations
Weighted Extended B-Spline Finite Element Analysis of a coupled system of general Elliptic equations Open
In this study we establish the existence and uniqueness of the solution of a coupled system of general elliptic equations with anisotropic diffusion , non-uniform advection and variably influencing reaction terms on Lipschitz continuous do…