National Institute of Technology Meghalaya

output

20142025

most citedInterplay between Phonon Confinement and Fano Effect on Raman line shape for semiconductor nanostructures: Analytical study

53 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

28 papers

stat.ME2025

Estimation of the Coefficient of Variation of Weibull Distribution under Type-I Progressively Interval Censoring: A Simulation-based Approach

Bankitdor M Nongrum, Adarsha Kumar Jena

Measures of relative variability, such as the Pearson's coefficient of variation (CV $_{p}$ ), give much insight into the spread of lifetime distributions, like the Weibull distributio…

astro-ph.CO2025★ 1 cited

Axion-Photon Conversion In Magnetized Universe: Impact On The Global 21-cm Signal

Pravin Kumar Natwariya, Vivekanand Mohapatra, Hriditi Howlader

The reported anomalous global 21-cm signal $(T_{21})$ from the cosmic dawn era by Experiment to Detect the Global Epoch of Reionisation Signature (EDGES) could hint towards new phy…

astro-ph.CO2025

Cosmological bounds on dark matter annihilation using dark ages 21-cm signal

Vivekanand Mohapatra

We investigate the impact of dark matter (DM) annihilation on the global 21-cm signal during the dark ages and cosmic dawn eras. The 21-cm line provides a complementary probe for s…

cs.LG2024★ 13 cited

WaveCatBoost for Probabilistic Forecasting of Regional Air Quality Data

Jintu Borah, Tanujit Chakraborty, Md. Shahrul Md. Nadzir +2

Accurate and reliable air quality forecasting is essential for protecting public health, sustainable development, pollution control, and enhanced urban planning. This letter presen…

astro-ph.CO2024★ 8 cited

Primordial Magnetic Fields in Light of Dark Ages Global 21-cm Signal

Vivekanand Mohapatra, Pravin Kumar Natwariya, Alekha C. Nayak

We study the constraints on primordial magnetic fields (PMFs) in light of the global 21-cm signal observed during the dark ages. Primordial magnetic fields can heat the intergalact…

astro-ph.CO2023★ 2 cited

In Search of Global 21-cm Signal using Artificial Neural Network in light of ARCADE 2

Vivekanand Mohapatra, Johnny J, Pravin Kumar Natwariya +2

Understanding the astrophysical nature of the first stars remains an unsolved problem in cosmology. The redshifted global 21-cm signal $(T_{21})$ acts as a treasure trove to prob…

gr-qc2023★ 29 cited

Modelling the Accelerating Universe with $f (Q)$ Gravity: Observational Consistency

S. A. Narawade, S. H. Shekh, B. Mishra +2

In this paper, we present a cosmological model within the framework of symmetric teleparallel gravity, focusing on $f (Q)$ gravity, where $Q$ represents the non-metricity scalar. Ut…

gr-qc2022★ 6 cited

Global phase space analysis for a class of single scalar field bouncing solutions in general relativity

A. S. Agrawal, Saikat Chakraborty, B. Mishra +2

We carry out a compact phase space analysis of a non-canonical scalar field theory whose Lagrangian is of the form $F (X) - V (ϕ)$ within general relativity. In particular, we focus on…

hep-ph2022★ 9 cited

Bounds on sterile neutrino lifetime and mixing angle with active neutrinos by global 21 cm signal

Pravin Kumar Natwariya, Alekha C. Nayak

Sterile neutrinos can be a possible candidate for dark matter. Sterile neutrinos are radiatively unstable and can inject photon energy into the intergalactic medium (IGM). The inje…

physics.optics2022★ 15 cited

Low-power optical bistability in $P T$ -symmetric chirped Bragg gratings with four-wave mixing

S. Sudhakar, S. Vignesh Raja, A. Govindarajan +2

The central theme of this article is the analysis of the usefulness of introducing four-wave mixing or modulation of Kerr nonlinearity in a nonuniform grating structure with gain a…

gr-qc2021★ 26 cited

Interacting quintessence in light of Generalized Uncertainty Principle: Cosmological perturbations and dynamics

Andronikos Paliathanasis, Genly Leon, Wompherdeiki Khyllep +2

We consider a cosmological scenario endowed with an interaction between the universe's dark components $-$ dark matter and dark energy. Specifically, we assume the dark matter comp…

gr-qc2021★ 8 cited

Cosmological dynamics and bifurcation analysis of the general non-minimally coupled scalar field models

Wompherdeiki Khyllep, Jibitesh Dutta

Non-minimally coupled scalar field models are well-known for providing interesting cosmological features. These include a late time dark energy behavior, a phantom dark energy evol…

math.FA2019★ 1 cited

Characterizations of Multiframelets on $Q_{p}$

Debasis Haldar, Animesh Bhandari

This paper presents a discussion on $p$ -adic multiframe by means of its wavelet structure, called as multiframelet, which is build upon $p$ -adic wavelet construction. Multiframelet…

astro-ph.CO2019★ 18 cited

Baryon-Dark matter interaction in presence of magnetic fields in light of EDGES signal

Jitesh R. Bhatt, Pravin Kumar Natwariya, Alekha C. Nayak +1

We have shown that in presence of a cosmic magnetic field the bounds on baryon dark matter cross-section ( $σ^$ ), dark-matter mass ( $m_{d}$ ) and values of the magnetic field ($B_0…

hep-ph2019★ 1 cited

Very special relativity induced phase in neutrino oscillation

Alekha C. Nayak

In Very Special Relativity (VSR), the neutrino mass term is coupled with the VSR preferred axis, and hence Lorentz violating in nature. Beyond standard model physics predicts neutr…

math.NA2018

On Generalized Jacobi, Gauss-Seidel and SOR Methods

Manideepa Saha, Jahnavi Chakrabarty

In this paper generalization of Jacobi and Gauss-Seidel methods, introduced by Salkuyeh in 2007, is studied. In particular, convergence criteria for these methods are discussed. A…

math.FA2018

Perturbations on K-fusion frames

Animesh Bhandari, Saikat Mukherjee

K-fusion frames are generalizations of fusion frames in frame theory. This article characterizes various kinds of property of K-fusion frames. Several perturbation results on K-fus…

cs.SI2018

EvoCut : A new Generalization of Albert-Barabási Model for Evolution of Complex Networks

Shailesh Kumar Jaiswal, Nabajyoti Medhi, Manjish Pal +3

With the evolution of social networks, the network structure shows dynamic nature in which nodes and edges appear as well as disappear for various reasons. The role of a node in th…

cs.CG2018

Rederiving the Upper Bound for Halving Edges using Cardano's Formula

Pintu Chauhan, Manjish Pal, Napendra Solanki

In this paper we rederive an old upper bound on the number of halving edges present in the halving graph of an arbitrary set of $n$ points in 2-dimensions which are placed in gener…

cond-mat.stat-mech2017★ 4 cited

Inertial frictional ratchets and their load bearing efficiencies

D. Kharkongor, W. L. Reenbohn, Mangal C. Mahato

We investigate the performance of an inertial frictional ratchet in a sinusoidal potential driven by a sinusoidal external field. The dependence of the performance on the parameter…

hep-ph2017★ 2 cited

Cosmological Dark Matter in a Conformal Model

Prasenjit Sanyal, Alekha C. Nayak, Gopal Kashyap +1

We study the collider, astrophysical and cosmological constraints on the dark matter sector of a conformal model within the framework of both the freeze out as well as the freeze i…

math.NA2017★ 1 cited

Generalized Jacobi and Gauss-Seidel Method for Solving Non-Square Linear Systems

Manideepa Saha

The main goal of this paper is to generalize Jacobi and Gauss-Seidel methods for solving non-square linear system. Towards this goal, we present iterative procedures to obtain an a…

cond-mat.stat-mech2016★ 23 cited

Particle dynamics in a symmetrically driven underdamped inhomogeneous periodic potential system