Publications (33)
Cosmic rays for imaging cultural heritage objects
Andrea Giammanco, Marwa Al Moussawi, Matthieu Boone +6
In cultural heritage conservation, it is increasingly common to rely on non-destructive imaging methods based on the absorption or scattering of photons ( or rays) or neutr…
Make Bipedal Robots Learn How to Imitate
Vishal Kumar, Sinnu Susan Thomas
Bipedal robots do not perform well as humans since they do not learn to walk like we do. In this paper we propose a method to train a bipedal robot to perform some basic movements…
A Unified 3D Object Perception Framework for Real-Time Outside-In Multi-Camera Systems
Yizhou Wang, Sameer Pusegaonkar, Yuxing Wang +10
Accurate 3D object perception and multi-target multi-camera (MTMC) tracking are fundamental for the digital transformation of industrial infrastructure. However, transitioning "ins…
Design and Performance of a Universal SiPM Readout System for X- and Gamma-Ray Missions
Merlin Kole, Nicolas De Angelis, Nicolas Produit +15
The advent of both multi-messenger and time-domain astrophysics over the last decade has seen a large interest in the development of small-scale, cheap, and robust gamma-ray detect…
Comparative study on charging-up of single, double and triple Gas Electron Multipliers (GEM)
Vishal Kumar, Supratik Mukhopadhyay, Nayana Majumdar +1
In this paper, a detailed investigation has been carried out to understand the physics behind GEM charging-up and its effects on gain. Experiments have been performed on both doubl…
Understanding Gaming the System by Analyzing Self-Regulated Learning in Think-Aloud Protocols
Jiayi Zhang, Conrad Borchers, Canwen Wang +4
In digital learning systems, gaming the system refers to occasions when students attempt to succeed in an educational task by systematically taking advantage of system features rat…
Non-equilibrium effects in turbulent boundary layers over riblets: DNS of step changes in surface texture
Vishal Kumar, Melissa Kozul, Wen Wu +2
We computationally study the response of zero-pressure-gradient (ZPG) turbulent boundary layers (TBLs) to streamwise step changes from a smooth wall to riblets (SM_RI), and vice ve…
AmpleGCG-Plus: A Strong Generative Model of Adversarial Suffixes to Jailbreak LLMs with Higher Success Rates in Fewer Attempts
Vishal Kumar, Zeyi Liao, Jaylen Jones +1
Although large language models (LLMs) are typically aligned, they remain vulnerable to jailbreaking through either carefully crafted prompts in natural language or, interestingly,…
Generic Framework of Knowledge-Based Learning: Designing and Deploying of Web Application
Awais Khan Jumani, Anware Ali Sanjrani, Fida Hussain Khoso +3
Learning technology was used as standalone software to install in a particular system, which needs to buy learning software of a particular subject. It was costly and difficult to…
EduCoder: An Open-Source Annotation System for Education Transcript Data
Saad Ashraf, James Malamut, Vishal Kumar +7
We introduce EduCoder, a domain-specialized tool designed to support utterance-level annotation of educational dialogue. While general-purpose text annotation tools for NLP and qua…
Projection-based stabilization for high-order incompressible flow solvers
Antonio Blanco-Casares, Vishal Kumar, Daniel Mira +1
This work presents a novel stabilization strategy for the Galerkin formulation of the incompressible Navier-Stokes equations, developed to achieve high accuracy while ensuring conv…
Tangent Space of the Stable And Unstable Manifold of Anosov Diffeomorphism on 2-Torus
Federico Bonneto, Jack Wang, Vishal Kumar
In this paper we describe the tangent vectors of the stable and unstable manifold of a class of Anosov diffeomorphisms on the torus using the method of formal series…
Improved transfer matrix methods for calculating quantum transmission-coefficient
Debabrata Biswas, Vishal Kumar
Methods for calculating the transmission coefficient are proposed, all of which arise from improved non-reflecting WKB boundary conditions at the edge of the computational domain i…
Determination of charge spread, position resolution, energy resolution and gain uniformity of Gas Electron Multipliers (GEM)
Vishal Kumar, Subhendu Das, Promita Roy +4
Gas electron multipliers (GEM) detectors are gaseous detectors widely used for tracking and imaging applications due to their good position resolution, high efficiency at high irra…
Open RAN: Evolution of Architecture, Deployment Aspects, and Future Directions
Prabhu Kaliyammal Thiruvasagam, Chandrasekar T, Vinay Venkataram +6
The Open Radio Access Network (Open RAN) aims to enable disaggregated, virtualized, programmable, and data-driven intelligent network with open interfaces to support various real-t…
DiagramIR: An Automatic Pipeline for Educational Math Diagram Evaluation
Vishal Kumar, Shubhra Mishra, Rebecca Hao +3
Large Language Models (LLMs) are increasingly being adopted as tools for learning; however, most tools remain text-only, limiting their usefulness for domains where visualizations…
Dynamic Rank, Basis, and Matching
Jan van den Brand, Vishal Kumar, Daniel J. Zhang
We study dynamic algorithms for maintaining fundamental algebraic properties of matrices, specifically, rank, basis, and full-rank submatrices, with applications to maximum matchin…
Review of Computational Epigraphy
Vishal Kumar
Computational Epigraphy refers to the process of extracting text from stone inscription, transliteration, interpretation, and attribution with the aid of computational methods. Tra…
Muons for cultural heritage
Marwa Moussawi, Andrea Giammanco, Vishal Kumar +1
Non-destructive subsurface imaging methods based on the absorption or scattering of photons or neutrons are becoming increasingly popular in cultural asset conservation. However, t…
Scene Graph Generation with Geometric Context
Vishal Kumar, Albert Mundu, Satish Kumar Singh
Scene Graph Generation has gained much attention in computer vision research with the growing demand in image understanding projects like visual question answering, image captionin…
Digital Simulations to Enhance Military Medical Evacuation Decision-Making
Jeremy Fischer, Mahdi Al-Husseini, Ram Krishnamoorthy +2
Medical evacuation is one of the United States Army's most storied and critical mission sets, responsible for efficiently and expediently evacuating the battlefield ill and injured…
DDES Study of Confined and Unconfined NACA Wing Sections Using Spectral Elements
Vishal Kumar, Ananias Tomboulides, Paul Fischer +1
We develop hybrid RANS-LES strategies within the spectral element code Nek5000 based on the class of turbulence models. We chose airfoil sections at small flight configurati…
Leveraging unstructured grids for direct numerical simulations of wall turbulence
Amirreza Rouhi, Vishal Kumar, Wen Wu +2
Towards computational cost saving for direct numerical simulations (DNSs) of wall turbulence, we formulate an unstructured grid-generation framework, termed -grid, where the wa…
Design and studies of thick Gas Electron Multipliers fabricated in India
Promita Roy, Purba Bhattacharya, Vishal Kumar +3
THick Gas Electron Multipliers (THGEMs) are robust and high gain Micro Pattern Gaseous Detectors which are economically manufactured by standard drilling and etching of thin printe…
Role of Disorder in Governing the Magnetic Properties of Cu2IrO3
Priyanka Yadav, Sumit Sarkar, Vishal Kumar +6
CuIrO is a honeycomb iridate which has been studied recently as a candidate Kitaev quantum spin liquid. Its magnetic ground state however, has been reported to be quantum d…
Studies on charging-up of single Gas Electron Multiplier
Vishal Kumar, Sridhar Tripathy, Purba Bhattacharya +3
Mechanisms of charging-up and charging-down of Gas Electron Multiplier (GEM) have been studied. Experimental investigations have been carried out on both dielectric polarization an…
Application of riblets to separating turbulent boundary layers
Amirreza Rouhi, Vishal Kumar, Oriol Lehmkuhl +3
We conduct direct numerical simulations of separating turbulent boundary layers (TBLs) over triangular riblets with tip angles (T9) and (T6). Our setup follows the se…
Anti-site disorder and Berry curvature driven anomalous Hall effect in spin gapless semiconducting Mn2CoAl Heusler compound
Nisha Shahi, Ajit K. Jena, Gaurav K. Shukla +9
Spin gapless semiconductors exhibit a finite band gap for one spin channel and closed gap for other spin channel, emerged as a new state of magnetic materials with a great potentia…
POLAR-2 -- Latest Developments of the Next Generation GRB Polarimeter
Johannes Hulsman, Philipp Azzarello, Joerg Bayer +20
Gamma-Ray Bursts (GRBs) are among the most energetic events in the Universe. Despite over 50 years of research and measurements their prompt emission remains poorly understood, wit…
Silver plasmonic density tuned polarity switching and anomalous behaviour of high performance self-powered \b{eta}-gallium oxide solar-blind photodetector
Kanika Arora, Vishal Kumar, Mukesh Kumar
Deep understanding of plasmonic nanoparticles (PNPs)-light interaction over semiconductors surface shows great promises in enhancing their optoelectronic devices efficiency beyond…
Small-area Portable Resistive Plate Chambers for Muography
Amrutha Samalan, Samip Basnet, Eduardo Cortina Gil +8
Muography is finding applications in various domains such as volcanology, archaeology, civil engineering, industry, mining, and nuclear waste surveys. To simplify transportation an…
Multi-Sensor Alignment for Weather Simulations
Samsad Alam, Devyani Lambhate, Aditya Mohan +2
The paper introduces methods to align weather simulations across multiple sensors for autonomous vehicle perception, including ReDAM for fog intensity and Unified-weather-edit for…
Band splitting induced Berry flux and intrinsic anomalous Hall conductivity in NiCoMnGa quaternary Heusler compound
Gaurav K. Shukla, Jyotirmay Sau, Vishal Kumar +2
The anomalous transport properties of Heusler compounds become a hotspot of research in recent years due to their unique band structure and possible application in spintronics. In…