Lopamudra Mukherjee

ORCID: 0000-0001-8765-7563
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About
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Research Areas
  • Particle physics theoretical and experimental studies
  • Dark Matter and Cosmic Phenomena
  • Sparse and Compressive Sensing Techniques
  • Medical Image Segmentation Techniques
  • Quantum Chromodynamics and Particle Interactions
  • Advanced Image and Video Retrieval Techniques
  • Genomics and Chromatin Dynamics
  • Cosmology and Gravitation Theories
  • Advanced Vision and Imaging
  • Computational Geometry and Mesh Generation
  • Computational Physics and Python Applications
  • Advanced Image Processing Techniques
  • Image Processing Techniques and Applications
  • Gene expression and cancer classification
  • Neutrino Physics Research
  • Image Retrieval and Classification Techniques
  • Particle Detector Development and Performance
  • Digital Image Processing Techniques
  • Medical Imaging Techniques and Applications
  • Immune cells in cancer
  • Diverse Musicological Studies
  • Domain Adaptation and Few-Shot Learning
  • High-Energy Particle Collisions Research
  • Algorithms and Data Compression
  • Genomic variations and chromosomal abnormalities

Indian Institute of Technology Guwahati
2019-2024

Nankai University
2023-2024

University of Mississippi
2022-2023

University of Wisconsin–Whitewater
2012-2022

University of Wisconsin–Madison
2014

University at Buffalo, State University of New York
2005-2009

New York University
2007

We study the cosegmentation problem where objective is to segment same object (i.e., region) from a pair of images. The segmentation for each image can be cast using partitioning/segmentation function with an additional constraint that seeks make histograms segmented regions (based on intensity and texture features) similar. Using Markov Random Field (MRF) energy terms simultaneous images together histogram consistency requirements squared L(2) (rather than L(1)) distance, after...

10.1109/cvpr.2009.5206652 article EN 2009 IEEE Conference on Computer Vision and Pattern Recognition 2009-06-01

With the proliferation of wearable cameras, number videos users documenting their personal lives using such devices is rapidly increasing. Since may span hours, there an important need for mechanisms that represent information content in a compact form (i.e., shorter which are more easily browsable/sharable). Motivated by these applications, this paper focuses on problem egocentric video summarization. Such usually continuous with significant camera shake and other quality issues. Because...

10.1109/cvpr.2015.7298836 article EN 2015-06-01

Our primary interest is in generalizing the problem of Cosegmentation to a large group images, that is, concurrent segmentation common foreground region(s) from multiple images. We further wish for our algorithm offer scale invariance (foregrounds may have arbitrary sizes different images) and running time increase (no more than) near linearly number images set. What makes this setting particularly challenging even if we ignore desiderata, problem, as formalized many recent papers (except),...

10.1109/cvpr.2011.5995420 article EN 2011-06-01

We study the problem of online subspace learning in context sequential observations involving structured perturbations. In learning, are an unknown mixture two components presented to model sequentially - main effect which pertains and a residual/error term. If no additional requirement is imposed on residual, it often corresponds noise terms signal were unaccounted for by effect. To remedy this, one may impose "structural" contiguity, has intended leveraging secondary as covariate that...

10.1109/iccv.2013.419 article EN 2013-12-01

Belle II has reported the first evidence for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>B</a:mi><a:mo>+</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mi>K</a:mi><a:mo>+</a:mo></a:msup><a:mi>ν</a:mi><a:mover accent="true"><a:mi>ν</a:mi><a:mo stretchy="false">¯</a:mo></a:mover></a:math> with a branching ratio <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mn>2.7</f:mn><f:mi>σ</f:mi></f:math> higher than standard...

10.1103/physrevd.109.l031701 article EN cc-by Physical review. D/Physical review. D. 2024-02-15

In this article, we have considered an extension of the inert Higgs doublet model with $SU(2{)}_{L}$ singlet vectorlike fermions. Our is capable addressing some interesting anomalous results in $b\ensuremath{\rightarrow}s{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ decays [like $R({K}^{(*)})$] and muon ($g\ensuremath{-}2$). Apart from explaining these anomalies, being consistent other flavor data, satisfies relevant constraints dark matter sector, while remaining within reach...

10.1103/physrevd.100.115010 article EN cc-by Physical review. D/Physical review. D. 2019-12-05

A bstract We study flavor changing neutral current decays of B and K mesons in the dark U(1) D model, with photon/dark Z mass between 10 MeV 2 GeV. Although model provides an improved fit (compared to standard model) differential decay distributions → (∗) ℓ + − , = μ e s ϕμ allowed parameter space is ruled out by measurements atomic parity violation, invisible decay, $$ {B}_s-{\overline{B}}_s <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>B</mml:mi>...

10.1007/jhep03(2023)108 article EN cc-by Journal of High Energy Physics 2023-03-16

We present two models of dark matter~(DM) that can provide a natural explanation the excess \mbox{$B^+\to K^+ +\,\text{invisible}$} events with respect to Standard Model~(SM) prediction for \nu\bar\nu$}, which has been reported by Belle~II collaboration. Interactions between and visible sector are mediated an axion-like particle (ALP) in one case, kinetic mixing photon SM second case. Both encompass light fermion singlet as DM candidate account observed relic abundance through, respectively,...

10.48550/arxiv.2502.04900 preprint EN arXiv (Cornell University) 2025-02-07

Abstract Numerous studies indicate that the genome of higher eukaryotes is organized into distinct chromosome territories and 3‐D arrangement these may be closely connected to genomic function global regulation gene expression. Despite this progress, degree non‐random remains unclear no overall model has been proposed for territory associations. To address issue, a re‐FISH approach was combined with computational analysis pair‐wise associations six pairs human chromosomes (chr #1, 4, 11, 12,...

10.1002/jcp.21836 article EN Journal of Cellular Physiology 2009-06-03

Abstract Higher order chromatin organization in concert with epigenetic regulation is a key process that determines gene expression at the global level. The of dynamic domains and their associated protein factors intertwined nuclear function to create higher levels functional zones within cell nucleus. As step towards elucidating dynamics these zones, we have investigated spatial proximities among constellation functionally related sites are found euchromatic regions nucleus including: HP1γ,...

10.1002/jcb.21834 article EN Journal of Cellular Biochemistry 2008-07-10

Recent experimental results in $B$ physics from Belle, BABAR, and LHCb suggest new (NP) the weak $b\ensuremath{\rightarrow}c$ charged-current processes. Here we focus specifically on decay modes ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{*+}{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}$ with $\ensuremath{\ell}=e$ $\ensuremath{\mu}$. The world averages of ratios ${R}_{D}$ ${R}_{D}^{*}$ currently differ Standard Model (SM) predictions by $3.4\ensuremath{\sigma}$ while...

10.1103/physrevd.107.015011 article EN cc-by Physical review. D/Physical review. D. 2023-01-13

Abstract There is growing evidence that chromosome territories have a probabilistic non‐random arrangement within the cell nucleus of mammalian cells. Other than their radial positioning, however, our knowledge degree and specificity territory associations predominantly limited to studies pair‐wise associations. In this study we investigated association profiles eight human pairs (numbers 1, 2, 3, 4, 6, 7, 8, 9) in nuclei G 0 ‐arrested WI38 diploid lung fibroblasts. Associations between...

10.1002/jcp.21842 article EN Journal of Cellular Physiology 2009-06-08

We study a problem scenario of super-resolution (SR) algorithms in the context whole slide imaging (WSI), popular modality digital pathology. Instead just one pair high- and low-resolution images, which is typically setup SR are designed, we given multiple intermediate resolutions same image as well. The question remains how to best utilize such data make transformation learning inherent more tractable address unique challenges that arises this biomedical application. propose recurrent...

10.1117/1.jbo.24.12.126003 article EN cc-by Journal of Biomedical Optics 2019-12-13

A bstract We study a generic leptophilic U(1) X extension of the standard model with light gauge boson. The charge assignments for leptons are guided by lepton universality violating (LUV) observables in semileptonic b → sℓℓ decays, muon anomalous magnetic moment and origin leptonic masses mixing. Anomaly cancellation conditions require addition new chiral fermions model, one which acts as dark matter (DM) candidate when it is stabilised an additional $$ {\mathcal{Z}}_2 <mml:math...

10.1007/jhep12(2020)052 article EN cc-by Journal of High Energy Physics 2020-12-01

Abstract We consider a singlet fermionic dark matter (DM) χ in gauged U(1) B -3 L i extension of the Standard Model (SM), with ⋲ e, μ, τ , and derive bounds on allowed parameter space, considering its production via freeze-in mechanism. The DM communicates SM only through flavorful vector-portal Z B3L due to non-trivial charge x under which also guarantees stability over age Universe for ≠ {±3/2, ±3}. Considering lie within mass range few MeV up GeV, we obtain constraints gauge coupling g...

10.1088/1475-7516/2022/08/049 article EN Journal of Cosmology and Astroparticle Physics 2022-08-01

We constrain the parameters of a representative new physics model with possible dark matter (DM) signature from global Cabibbo-Kobayashi-Maskawa (CKM) fit analysis. The has neutral quark current interactions mediated by scalar, impacting semileptonic and purely leptonic meson decays at one loop. take this opportunity to update results for Wolfenstein CKM elements without contribution using several other updated inputs. In addition, we analyze include...

10.1103/physrevd.107.055041 article EN cc-by Physical review. D/Physical review. D. 2023-03-27

We present a computational approach for improving the quality of resolution images acquired from commonly available low magnification commercial slide scanners. Images such scanners can be cheaply and are efficient in terms storage data transfer. However, they generally poorer than high-resolution microscopes do not have necessary needed diagnostic or clinical environments, hence used settings. The driving question this presented research is whether these could enhanced that it would serve...

10.1364/boe.9.005368 article EN cc-by Biomedical Optics Express 2018-10-12

We present a 3-D mapping in WI38 human diploid fibroblast cells of chromosome territories (CT) 13,14,15,21, and 22, which contain the nucleolar organizing regions (NOR) participate formation nucleoli. The nuclear radial positioning NOR-CT correlated with size chromosomes smaller CT more interior. A high frequency pairwise associations between ranging from 52% (CT13-21) to 82% (CT15-21) was detected as well triplet arrangement CT15-21-22 (72%). homologous were significantly lower (24-36%)....

10.1002/jcp.24726 article EN Journal of Cellular Physiology 2014-07-30
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