Publications (70)
Investigation of Kelvin-like solid foams for potential engineering applications: An attractive set of geometrical and thermo-hydraulic properties
Prashant Kumar
Open cell foams have diverse industrial applications e.g. heat exchangers, structured reactors, filtration due to their unique properties such as high porosity and high specific su…
Possible potentials responsible for stable circular relativistic orbits
Prashant Kumar, Kaushik Bhattacharya
Bertrand's theorem in classical mechanics of the central force fields attracts us because of its predictive power. It categorically proves that there can only be two types of force…
Neutral Excitations of Quantum Hall States: a Density Matrix Renormalization Group Study
Prashant Kumar, F. D. M. Haldane
We use the dynamical structure factors of the quantum Hall states at and in the lowest Landau level to study their excitation spectrum. Using the density matrix r…
Approximation of discontinuous functions by Kantorovich exponential sampling series
A. Sathish Kumar, Prashant Kumar, P. Devaraj
The Kantorovich exponential sampling series at jump discontinuities of the bounded measurable signal f has been analysed. A representation lemma for the series is established and u…
fybrrStream: A WebRTC based Efficient and Scalable P2P Live Streaming Platform
Debajyoti Halder, Prashant Kumar, Saksham Bhushan +1
The demand for streaming media and live video conferencing is at peak and expected to grow further, thereby the need for low-cost streaming services with better quality and lower l…
Development of Thomson parabola spectrometer for diagnostics of ions driven by ultrahigh intensity laser: Simulations and numerical analysis
Kavil Mehta, Jatin Parashar, Shivangi Bidoliya +4
A Thomson parabola ion spectrometer (TPIS) has been designed and developed for diagnostics of laseraccelerated ion beams in the MeV energy range. The TPIS has been validated by ion…
Revisiting Point Cloud Completion: Are We Ready For The Real-World?
Stuti Pathak, Prashant Kumar, Dheeraj Baiju +3
Point clouds acquired in constrained, challenging, uncontrolled, and multi-sensor real-world settings are noisy, incomplete, and non-uniformly sparse. This presents acute challenge…
DSLR: Dynamic to Static LiDAR Scan Reconstruction Using Adversarially Trained Autoencoder
Prashant Kumar, Sabyasachi Sahoo, Vanshil Shah +5
Accurate reconstruction of static environments from LiDAR scans of scenes containing dynamic objects, which we refer to as Dynamic to Static Translation (DST), is an important area…
Large photoresponse of Cu:TCNQ nanowire arrays formed as aligned nanobridges
Rabaya Basori, K. Das, Prashant Kumar +2
We report for the first time a large photoresponse in an array of charge transfer complex Cu:TCNQ nanowires (average diameter 30 nm) fabricated as a nanobridge device. The device s…
A machine learning framework for computationally expensive transient models
Prashant Kumar, Kushal Sinha, Nandkishor Nere +4
The promise of machine learning has been explored in a variety of scientific disciplines in the last few years, however, its application on first-principles based computationally e…
Evaluating the Performance of Low-Cost PM2.5 Sensors in Mobile Settings
Priyanka deSouza, An Wang, Yuki Machida +7
Low-cost sensors (LCS) for measuring air pollution are increasingly being deployed in mobile applications but questions concerning the quality of the measurements remain unanswered…
Interaction effects on quantum Hall transitions: dynamical scaling laws and superuniversality
Prashant Kumar, P. A. Nosov, S. Raghu
We study the role of electron-electron interactions near integer and abelian fractional quantum Hall (QH) transitions using composite fermion (CF) representations. Interaction effe…
Effect of turbulent diffusion in modeling anaerobic digestion
Jeremy Z. Yan, Prashant Kumar, Wolfgang Rauch
In this study, the impact of turbulent diffusion on mixing of biochemical reaction models is explored by implementing and validating different models. An original codebase called C…
On Bivariate Kantorovich Exponential Sampling Series
Prashant Kumar, A. Sathish Kumar, Shivam Bajpyei
We analyse the approximation properties of the bivariate generalization of the family of Kantorovich type exponential sampling series. We derive the point-wise and Voronovskaya typ…
Scaling of entanglement entropy at quantum critical points in random spin chains
Prashant Kumar, R. N. Bhatt
We study the scaling properties of the entanglement entropy (EE) near quantum critical points in interacting random antiferromagnetic (AF) spin chains. Using density-matrix renorma…
Observation of a Large Photo-response in a Single Nanowire (Diameter ~30 nm) of Charge Transfer Complex Cu:TCNQ
Rabaya Basori, Kaustuv Das, T. Phanindra. Sai +3
We report for the first time large photoresponse in a single NW of the charge transfer complex Cu:TCNQ. We fabricate a metal-semiconductor-metal device with a single NW and focus i…
Anisotropic quantum Hall states in the presence of interactions with fourfold rotational symmetry
Prashant Kumar, R. N. Bhatt
We study the effects of anisotropic interactions in the quantum Hall effect in the presence of a fourfold discrete rotational () symmetry. Employing the density matrix renorma…
Evidence for in situ particle energization during the May-2024 event based on ASPEX instrument on board Aditya-L1
Shivam Parashar, Dibyendu Chakrabarty, Prashant Kumar +26
The interaction between interplanetary Coronal Mass Ejection (ICME) structures can alter the geo-effectiveness of the ICME events in myriad ways. Many aspects of these interaction…
Replaceable Bit-based Gripper for Picking Cluttered Food Items
Prashant Kumar, Yukiyasu Domae, Weiwei Wan +1
The food packaging industry goes through changes in food items and their weights quite rapidly. These items range from easy-to-pick, single-piece food items to flexible, long and c…
Transitivity And Related Notions For Graph Induced Symbolic Systems
Prashant Kumar, Puneet Sharma
In this paper, we investigate the dynamical behavior of a two dimensional shift (generated by a two dimensional graph ) using the adjacency matri…
Temperature Driven Multi-modal/Single-actuated Soft Finger
Prashant Kumar, Weiwei Wan, Kensuke Harada
Soft pneumatic fingers are of great research interest. However, their significant potential is limited as most of them can generate only one motion, mostly bending. The conventiona…
Transfer of temporal coherence in parametric down-conversion
Girish Kulkarni, Prashant Kumar, Anand K. Jha
We show that in parametric down-conversion the coherence properties of a temporally partially coherent pump field get entirely transferred to the down-converted entangled two-photo…
Deep Learning based Skin-layer Segmentation for Characterizing Cutaneous Wounds from Optical Coherence Tomography Images
Prashant Kumar, Swatantra Dhara, Ayan Gope +2
Optical coherence tomography (OCT) is a medical imaging modality that allows us to probe deeper substructures of skin. The state-of-the-art wound care prediction and monitoring met…
MOVES: Movable and Moving LiDAR Scene Segmentation in Label-Free settings using Static Reconstruction
Prashant Kumar, Dhruv Makwana, Onkar Susladkar +2
Accurate static structure reconstruction and segmentation of non-stationary objects is of vital importance for autonomous navigation applications. These applications assume a LiDAR…
A numerical study of bounds in the correlations of fractional quantum Hall states
Prashant Kumar, F. D. M. Haldane
We numerically compute the guiding center static structure factor of various fractional quantum Hall (FQH) states to where i…
Geometric Critical Exponents in Classical and Quantum Phase Transitions
Prashant Kumar, Tapobrata Sarkar
We define geometric critical exponents for systems that undergo continuous second order classical and quantum phase transitions. These relate scalar quantities on the information t…
Introducing CHAD -- An ADM1 Solver for Direct Linking to Lagrangian CFD Software
Prashant Kumar, Zhenghao Yan, Soroush Dabiri +2
Standard methods for modeling anaerobic digestion processes assume homogeneous conditions inside the tank and thus suffer from the negligence of hydrodynamics. In this work, we pre…
Implementation of a level-set based volume penalization method for solving fluid flows around bluff bodies in OpenFOAM
Prashant Kumar, Vivek Kumar, Di Chen +1
A volume penalization-based immersed boundary technique is developed and thoroughly validated for fluid flow problems, specifically flow over bluff bodies. The proposed algorithm h…
fybrrLink: Efficient QoS-aware Routing in SDN enabled Next-Gen Satellite Networks
Prashant Kumar, Saksham Bhushan, Debajyoti Halder +1
Providing high-speed Internet service using satellite network has attracted researchers from both academia and industry mainly due to the characteristics of Low Earth Orbit (LEO) s…
Parameterized Complexity on a New Sorting Algorithm: A Study in Simulation
Prashant Kumar, Anchala Kumari, Soubhik Chakraborty
Sundararajan and Chakraborty (2007) introduced a new sorting algorithm by modifying the fast and popular Quick sort and removing the interchanges. In a subsequent empirical study,…
Self-duality of the integer quantum Hall to insulator transition: composite fermion description
Prashant Kumar, Yong Baek Kim, S. Raghu
The integer quantum Hall to insulator transition (IQHIT) is a paradigmatic quantum critical point. Key aspects of this transition, however, remain mysterious, due to the simultaneo…
RiskLabs: Predicting Financial Risk Using Large Language Model based on Multimodal and Multi-Sources Data
Yupeng Cao, Zhi Chen, Prashant Kumar +7
The integration of Artificial Intelligence (AI) techniques, particularly large language models (LLMs), in finance has garnered increasing academic attention. Despite progress, exis…
Multi-directional investigations on quiet time suprathermal ions measured by ASPEX-STEPS on-board Aditya L1
Aakash Gupta, Dibyendu Chakrabarty, Santosh Vadawale +26
The origin, acceleration and anisotropy of suprathermal ions in the interplanetary medium during quiet periods have remained poorly understood issues in solar wind physics. To addr…
Structured Prediction in NLP -- A survey
Chauhan Dev, Naman Biyani, Nirmal P. Suthar +2
Over the last several years, the field of Structured prediction in NLP has had seen huge advancements with sophisticated probabilistic graphical models, energy-based networks, and…
Detecting key Soccer match events to create highlights using Computer Vision
Narayana Darapaneni, Prashant Kumar, Nikhil Malhotra +5
The research and data science community has been fascinated with the development of automatic systems for the detection of key events in a video. Special attention in this field is…
Stochastic turbulence modeling in RANS simulations via Multilevel Monte Carlo
Prashant Kumar, Martin Schmelzer, Richard P. Dwight
A multilevel Monte Carlo (MLMC) method for quantifying model-form uncertainties associated with the Reynolds-Averaged Navier-Stokes (RANS) simulations is presented. Two, high-dimen…
Possible continuous transition from fractional quantum Hall to stripe phase at
Prashant Kumar, R. N. Bhatt
We study the phase diagram of state in the Landau level in the presence of band mass anisotropy. Using density matrix renormalization group on an infinite cylinder…
Emergent reflection symmetry from non-relativistic composite fermions
Prashant Kumar, Michael Mulligan, S. Raghu
A recent experimental study [Pan et al., arXiv: 1902.10262] has shown that fractional quantum Hall effect gaps are essentially consistent with particle-hole symmetry in the lowest…
Numerical Study of a Dual Representation of the Integer Quantum Hall Transition
Kevin S. Huang, S. Raghu, Prashant Kumar
We study the critical properties of the non-interacting integer quantum Hall to insulator transition (IQHIT) in a "dual" composite-fermion (CF) representation. A key advantage of t…
Multiscale Physics-Informed Neural Network for Complex Fluid Flows with Long-Range Dependencies
Prashant Kumar, Rajesh Ranjan
Fluid flows are governed by the nonlinear Navier-Stokes equations, which can manifest multiscale dynamics even from predictable initial conditions. Predicting such phenomena remain…
GLiDR: Topologically Regularized Graph Generative Network for Sparse LiDAR Point Clouds
Prashant Kumar, Kshitij Madhav Bhat, Vedang Bhupesh Shenvi Nadkarni +1
Sparse LiDAR point clouds cause severe loss of detail of static structures and reduce the density of static points available for navigation. Reduced density can be detrimental to n…
Composite Fermion Nonlinear Sigma Models
Chao-Jung Lee, Prashant Kumar, Michael Mulligan
We study the integer quantum Hall plateau transition using composite fermion mean-field theory. We show that the topological term in the associated nonlinear sigma model […
Geodesic flows and their deformations in Bertrand spacetimes
Prashant Kumar, Kaushik Bhattacharya, Tapobrata Sarkar
In this article we will discuss some features of a particular spacetime called Bertrand space-time of Type II (BST-II). The talk discusses about the energy conditions and the ESR p…
Exploring the nature of the emergent gauge field in composite-fermion metals: A large-scale microscopic study
Amogh Anakru, Mytraya Gattu, Ajit C. Balram +4
Field theories of the composite-fermion (CF) metal model it as a Fermi sea of composite fermions coupled to an emergent gauge field. Within a random phase approximation, these theo…
List Sort: A New Approach for Sorting List to Reduce Execution Time
Adarsh Kumar Verma, Prashant Kumar
In this paper we are proposing a new sorting algorithm, List Sort algorithm, is based on the dynamic memory allocation. In this research study we have also shown the comparison of…
Controlled spin-to-charge conversion in noncollinear antiferromagnet-based Py/MnPt heterostructure
Indraneel Sinha, Saurav Sachin, Prashant Kumar +3
Noncollinear antiferromagnets (NCAFs) have recently emerged as promising candidates for future spintronic technologies, offering ultrafast switching, negligible stray fields allowi…
Formal Methods and Event Notification Systems in Mobile Computing Environment
Prashant Kumar, R. K. Ghosh
In this report, we have explored the issues associated with the specification of event-based systems in a mobile environment using Unity \cite{unity}. We used a few constructs and…
Geodesics in Information Geometry : Classical and Quantum Phase Transitions
Prashant Kumar, Subhash Mahapatra, Prabwal Phukon +1
We study geodesics on the parameter manifold, for systems exhibiting second order classical and quantum phase transitions. The coupled non-linear geodesic equations are solved nume…
One Year of ASPEX-STEPS Operation: Characteristic Features, Observations and Science Potential
Jacob Sebastian, Bijoy Dalal, Aakash Gupta +26
The SupraThermal and Energetic Particle Spectrometer (STEPS), a subsystem of the Aditya Solar wind Particle EXperiment (ASPEX) onboard India's Aditya-L1 satellite, is designed to s…
One year of ASPEX-SWIS operation -- Characteristic features, observations and science potential
Abhishek Kumar, Shivam Parashar, Prashant Kumar +26
The Aditya-L1 mission, India's first dedicated solar observatory positioned at the first Lagrange point (L1) of the Sun-Earth system, carries the Solar Wind Ion Spectrometer (SWIS)…
Differentiable SLAM Helps Deep Learning-based LiDAR Perception Tasks
Prashant Kumar, Dheeraj Vattikonda, Vedang Bhupesh Shenvi Nadkarni +2
We investigate a new paradigm that uses differentiable SLAM architectures in a self-supervised manner to train end-to-end deep learning models in various LiDAR based applications.…
Data Processing Software for Chandrayaan-2 Solar X-ray Monitor
N. P. S. Mithun, Santosh V. Vadawale, Arpit R. Patel +11
Solar X-ray Monitor (XSM) instrument of India's Chandrayaan-2 lunar mission carries out broadband spectroscopy of the Sun in soft X-rays. XSM, with its unique features such as low…
PhishNet: A Phishing Website Detection Tool using XGBoost
Prashant Kumar, Kevin Antony, Deepakmoney Banga +1
PhisNet is a cutting-edge web application designed to detect phishing websites using advanced machine learning. It aims to help individuals and organizations identify and prevent p…
Composite fermion Hall conductivity and the half-filled Landau level
Prashant Kumar, Srinivas Raghu, Michael Mulligan
We consider the Hall conductivity of composite fermions in the theory of Halperin, Lee, and Read (HLR). We present a fully quantum mechanical numerical calculation that shows, unde…
Characterization of Zinc oxide & Aluminum Ferrite and Simulation studies of M-H plots of Cobalt/Cobaltoxide
Prashant Kumar, Balram S. Yadav, Komal Singh +1
Zinc oxide and Aluminum Ferrite were prepared Chemical route. The samples were characterized by XRD and VSM. Simulation of M-H plots of Co/CoO thin films were performed. Effect of…
Multi-objective topology optimization of heat transfer surface using level-set method and adaptive mesh refinement in OpenFOAM
Di Chen, Prashant Kumar, Yukinori Kametani +1
The present study proposes a new efficient and robust algorithm for multi-objectives topology optimization of heat transfer surfaces to achieve heat transfer enhancement with a les…
A simulation driven optimization algorithm for scheduling sorting center operations
Supratim Ghosh, Aritra Pal, Prashant Kumar +4
Parcel sorting operations in logistics enterprises aim to achieve a high throughput of parcels through sorting centers. These sorting centers are composed of large circular conveyo…
Energetic ( 2 MeV) ion fluxes measured by ASPEX-STEPS on board Aditya-L1 during its earth-bound phase
Dibyendu Chakrabarty, Bijoy Dalal, Santosh Vadawale +26
During its earth-bound phase of the Aditya-L1 spacecraft of India, the Supra-Thermal and Energetic Particle Spectrometer (STEPS) of the Aditya Solar wind Particle EXperiment (ASPEX…
A parametric acceleration of multilevel Monte Carlo convergence for nonlinear variably saturated flow
Prashant Kumar, Carmen Rodrigo, Francisco J. Gaspar +1
We present a multilevel Monte Carlo (MLMC) method for the uncertainty quantification of variably saturated porous media flow that are modeled using the Richards' equation. We propo…
SLACK: Attacking LiDAR-based SLAM with Adversarial Point Injections
Prashant Kumar, Dheeraj Vattikonda, Kshitij Madhav Bhat +2
The widespread adoption of learning-based methods for the LiDAR makes autonomous vehicles vulnerable to adversarial attacks through adversarial \textit{point injections (PiJ)}. It…
Corner Charge Fluctuations and Many-Body Quantum Geometry
Xiao-Chuan Wu, Kang-Le Cai, Meng Cheng +1
In many-body systems with U(1) global symmetry, the charge fluctuations in a subregion reveal important insights into entanglement and other global properties. For subregions with…
Graphene produced by radiation-induced reduction of graphene oxide
Prashant Kumar, K. S. Subrahmanyam, C. N. R. Rao
Effect of irradiation on graphene oxide by sunlight, UV light and KrF excimer laser has been investigated in detail. Both sunlight and ultraviolet light reduce graphene oxide well…
fybrrChat: A Distributed Chat Application for Secure P2P Messaging
Debajyoti Halder, Saksham Bhushan, Gundu Shreya +1
The growing demand for connecting with each other across the world has proved to be a boon to the growth of social media platforms. But when it comes to ensuring the privacy and se…
Weiss Oscillations in the Galilean-Invariant Dirac Composite Fermion Theory for Even-Denominator Filling Fractions of the Lowest Landau Level
Yen-Wen Lu, Prashant Kumar, Michael Mulligan
Standard field theoretic formulations of composite fermion theories for the anomalous metals that form at or near even-denominator filling fractions of the lowest Landau level do n…
Approximation of Discontinuous Signals by Exponential Sampling Series
A. Sathish Kumar, Prashant Kumar, P. Devaraj
We analyse the behaviour of the exponential sampling series at jump discontinuity of the bounded signal We obtain a representation lemma that is used for analysing…
On local Fourier analysis of multigrid methods for PDEs with jumping and random coefficients
Prashant Kumar, Carmen Rodrigo, Francisco J. Gaspar +1
In this paper, we propose a novel non-standard Local Fourier Analysis (LFA) variant for accurately predicting the multigrid convergence of problems with random and jumping coeffici…
Why is the HLR theory particle-hole symmetric?
Prashant Kumar, Michael Mulligan, S. Raghu
Long wavelength descriptions of a half-filled lowest Landau level () must be consistent with the experimental observation of particle-hole (PH) symmetry. The traditional d…
Geodesic Congruences and Their Deformations in Bertrand Space-times
Prashant Kumar, Kaushik Bhattacharya, Tapobrata Sarkar
We study the energy conditions and geodesic deformations in Bertrand space-times. We show that these can be thought of as interesting physical space-times in certain regions of the…
Explaining Results of Multi-Criteria Decision Making
Martin Erwig, Prashant Kumar
We introduce a method for explaining the results of various linear and hierarchical multi-criteria decision-making (MCDM) techniques such as WSM and AHP. The two key ideas are (A)…
On Graph Induced Symbolic Systems
Prashant Kumar, Puneet Sharma
\begin{abstract} In this paper, we investigate a shift arising from graph . We prove that any -dimensional shift of finite type can be generated through a -dimensional gra…