Publications (42)
Improving LLM Reliability through Hybrid Abstention and Adaptive Detection
Ankit Sharma, Nachiket Tapas, Jyotiprakash Patra
Large Language Models (LLMs) deployed in production environments face a fundamental safety-utility trade-off either a strict filtering mechanisms prevent harmful outputs but often…
Establishing Baselines for Photonic Quantum Machine Learning: Insights from an Open, Collaborative Initiative
Cassandre Notton, Vassilis Apostolou, Agathe Senellart +28
The Perceval Challenge is an open, reproducible benchmark designed to assess the potential of photonic quantum computing for machine learning. Focusing on a reduced and hardware-fe…
Joint Backhaul-Access Analysis of Full Duplex Self-Backhauling Heterogeneous Networks
Ankit Sharma, Radha Krishna Ganti, J. Klutto Milleth
With the successful demonstration of in-band full-duplex (IBFD) transceivers, a new research dimension has been added to wireless networks. This paper proposes an interesting use c…
Low field electron mobility in : An ab-initio approach
Ankit Sharma, Uttam Singisetti
The phase of is an ultra-wideband semiconductor with potential power electronics applications. In this work, we calculate the low field electron mobility in $α-…
On the Approximation of Submodular Functions
Nikhil R. Devanur, Shaddin Dughmi, Roy Schwartz +2
Submodular functions are a fundamental object of study in combinatorial optimization, economics, machine learning, etc. and exhibit a rich combinatorial structure. Many subclasses…
Effective Phonon Dispersion and Low field transport in AlxGa1-xN alloys using supercells: An ab-initio approach
Animesh Datta, Ankit Sharma, Matinehsadat Hosseinigheidari +1
To investigate the transport properties in random alloys, it is important to model the alloy disorder using supercells. Though traditional methods like Virtual Crystal Approximatio…
A systematic literature review on insider threats
Angad Pal Singh, Ankit Sharma
Insider threats is the most concerned cybersecurity problem which is poorly addressed by widely used security solutions. Despite the fact that there have been several scientific pu…
CCA: Exploring the Possibility of Contextual Camouflage Attack on Object Detection
Shengnan Hu, Yang Zhang, Sumit Laha +2
Deep neural network based object detection hasbecome the cornerstone of many real-world applications. Alongwith this success comes concerns about its vulnerability tomalicious atta…
Towards Consistent Predictive Confidence through Fitted Ensembles
Navid Kardan, Ankit Sharma, Kenneth O. Stanley
Deep neural networks are behind many of the recent successes in machine learning applications. However, these models can produce overconfident decisions while encountering out-of-d…
Predicting Small Group Accretion in Social Networks: A topology based incremental approach
Ankit Sharma, Xiaodong Feng, Kartik Singhal +2
Small Group evolution has been of central importance in social sciences and also in the industry for understanding dynamics of team formation. While most of research works studying…
Effective Phonon Dispersion of - (AlGa)O alloy semiconductor
Ankit Sharma, Animesh Datta, Uttam Singisetti
In this work, the Effective Phonon Dispersion of - (AlGa)O alloy is investigated using the Phonon unfolding formalism. To capture the true randomness of the…
Welfare and Profit Maximization with Production Costs
Avrim Blum, Anupam Gupta, Yishay Mansour +1
Combinatorial Auctions are a central problem in Algorithmic Mechanism Design: pricing and allocating goods to buyers with complex preferences in order to maximize some desired obje…
LightTopoGAT: Enhancing Graph Attention Networks with Topological Features for Efficient Graph Classification
Ankit Sharma, Sayan Roy Gupta
Graph Neural Networks have demonstrated significant success in graph classification tasks, yet they often require substantial computational resources and struggle to capture global…
Multiway Cut, Pairwise Realizable Distributions, and Descending Thresholds
Ankit Sharma, Jan Vondrák
We design new approximation algorithms for the Multiway Cut problem, improving the previously known factor of 1.32388 [Buchbinder et al., 2013]. We proceed in three steps. First, w…
Automated Detection and Analysis of Minor Deformations in Flat Walls Due to Railway Vibrations Using LiDAR and Machine Learning
Surjo Dey, Ankit Sharma, Hritu Raj +1
This study introduces an advanced methodology for automatically identifying minor deformations in flat walls caused by vibrations from nearby railway tracks. It leverages high-dens…
Exploring Algorithmic Solutions for the Independent Roman Domination Problem in Graphs
Kaustav Paul, Ankit Sharma, Arti Pandey
Given a graph , a function is said to be a \emph{Roman Dominating function} if for every with , there exists a vertex such…
Hi-CI: Deep Causal Inference in High Dimensions
Ankit Sharma, Garima Gupta, Ranjitha Prasad +3
We address the problem of counterfactual regression using causal inference (CI) in observational studies consisting of high dimensional covariates and high cardinality treatments.…
Algorithmic Results for Weak Roman Domination Problem in Graphs
Kaustav Paul, Ankit Sharma, Arti Pandey
Consider a graph and a function . A vertex with is defined as \emph{undefended} by if it lacks adjacency to any vertex w…
Quantitative imaging of Abrikosov vortices by scanning quantum magnetometry
Clemens Schäfermeier, Ankit Sharma, Christopher Kelvin von Grundherr +5
Understanding vortex matter in type-II superconductors is central to controlling dissipation and flux pinning in superconducting materials and devices. Here, we use cryogenic scann…
Near-Infrared Depth-Independent Image Dehazing using Haar Wavelets
Sumit Laha, Ankit Sharma, Shengnan Hu +1
We propose a fusion algorithm for haze removal that combines color information from an RGB image and edge information extracted from its corresponding NIR image using Haar wavelets…
Chemically stabilized epitaxial wurtzite-BN thin film
Badri Vishal, Rajendra Singh, Abhishek Chaturvedi +6
We report on the chemically stabilized epitaxial w-BN thin film grown on c-plane sapphire by pulsed laser deposition under slow kinetic condition. Traces of no other allotropes suc…
Electrical Characteristics of in situ Mg-doped beta-Ga2O3 Current-Blocking Layer for Vertical Devices
Sudipto Saha, Lingyu Meng, A F M Anhar Uddin Bhuiyan +4
The lack of p-type doping has impeded the development of vertical gallium oxide (Ga2O3) devices. Current blocking layers (CBL) using implanted deep acceptors has been used to demon…
An O(log(n)) Fully Dynamic Algorithm for Maximum matching in a tree
Manoj Gupta, Ankit Sharma
In this paper, we have developed a fully-dynamic algorithm for maintaining cardinality of maximum-matching in a tree using the construction of top-trees. The time complexities are…
Algorithms and Improved bounds for online learning under finite hypothesis class
Ankit Sharma, Late C. A. Murthy
Online learning is the process of answering a sequence of questions based on the correct answers to the previous questions. It is studied in many research areas such as game theory…
Ignorance is Almost Bliss: Near-Optimal Stochastic Matching With Few Queries
Avrim Blum, John P. Dickerson, Nika Haghtalab +3
The stochastic matching problem deals with finding a maximum matching in a graph whose edges are unknown but can be accessed via queries. This is a special case of stochastic -s…
Privacy-Preserving Public Information for Sequential Games
Avrim Blum, Jamie Morgenstern, Ankit Sharma +1
In settings with incomplete information, players can find it difficult to coordinate to find states with good social welfare. For example, in financial settings, if a collection of…
MetaCI: Meta-Learning for Causal Inference in a Heterogeneous Population
Ankit Sharma, Garima Gupta, Ranjitha Prasad +3
Performing inference on data obtained through observational studies is becoming extremely relevant due to the widespread availability of data in fields such as healthcare, educatio…
Conformal Nonlinear Fluid Dynamics from Gravity in Arbitrary Dimensions
Sayantani Bhattacharyya, R. Loganayagam, Ipsita Mandal +2
We generalize recent work to construct a map from the conformal Navier Stokes equations with holographically determined transport coefficients, in d spacetime dimensions, to the se…
Leveraging web resources for keyword assignment to short text documents
Ayush Singhal, Ravindra Kasturi, Ankit Sharma +1
Assigning relevant keywords to documents is very important for efficient retrieval, clustering and management of the documents. Especially with the web corpus deluged with digital…
Automatic Detection of Signalling Behaviour from Assistance Dogs as they Forecast the Onset of Epileptic Seizures in Humans
Hitesh Raju, Ankit Sharma, Aoife Smeaton +1
Epilepsy or the occurrence of epileptic seizures, is one of the world's most well-known neurological disorders affecting millions of people. Seizures mostly occur due to non-coordi…
Nonlinear Optical Limiting with Hybrid Nanostructures of NiCo2O4 and Multiwall Carbon Nanotubes
Ankit Sharma, Pritam Khan, Mansi Pathak +2
Nonlinear optical (NLO) response in terms of reverse saturable absorption (RSA) has been exploited extensively for optical limiting. Here, we experimentally demonstrate that flower…
A Linearization Technique for Self-Interference Cancellation in Full-Duplex Radios
Arjun Nadh, Joseph Samuel, Ankit Sharma +2
The fundamental problem in the design of a full-duplex radio is the cancellation of the self-interference (SI) signal generated by the transmitter.Current techniques for suppressin…
MultiMBNN: Matched and Balanced Causal Inference with Neural Networks
Ankit Sharma, Garima Gupta, Ranjitha Prasad +3
Causal inference (CI) in observational studies has received a lot of attention in healthcare, education, ad attribution, policy evaluation, etc. Confounding is a typical hazard, wh…
Effect of lockdown interventions to control the COVID-19 epidemic in India
Ankit Sharma, Shreyash Arya, Shashee Kumari +1
The pandemic caused by the novel Coronavirus SARS-CoV2 has been responsible for life threatening health complications, and extreme pressure on healthcare systems. While preventive…
Parallelized Instantaneous Velocity and Heading Estimation of Objects using Single Imaging Radar
Nihal Singh, Dibakar Sil, Ankit Sharma
The development of high-resolution imaging radars introduce a plethora of useful applications, particularly in the automotive sector. With increasing attention on active transport…
Origin of the quasi-quantized Hall effect in ZrTe5
Stanislaw Galeski, Toni Ehmcke, Rafal Wawrzynczak +24
The quantum Hall effect (QHE) is traditionally considered a purely two-dimensional (2D) phenomenon. Recently, a three-dimensional (3D) version of the QHE has been reported in the D…
Fast Griffin Lim based Waveform Generation Strategy for Text-to-Speech Synthesis
Ankit Sharma, Puneet Kumar, Vikas Maddukuri +5
The performance of text-to-speech (TTS) systems heavily depends on spectrogram to waveform generation, also known as the speech reconstruction phase. The time required for the same…
Predicting Multi-actor collaborations using Hypergraphs
Ankit Sharma, Jaideep Srivastava, Abhishek Chandra
Social networks are now ubiquitous and most of them contain interactions involving multiple actors (groups) like author collaborations, teams or emails in an organizations, etc. Hy…
Slim-CNN: A Light-Weight CNN for Face Attribute Prediction
Ankit Sharma, Hassan Foroosh
We introduce a computationally-efficient CNN micro-architecture Slim Module to design a lightweight deep neural network Slim-Net for face attribute prediction. Slim Modules are con…
Unveiling and engineering of third order optical nonlinearities in NiCoO nanoflowers
Ankit Sharma, Pritam Khan, Dipendranath Mandal +3
In this paper, we demonstrate NiCoO (NCO) as an efficient new nonlinear optical material with straightforward potential applications in optical limiting devices. We obtain…
Learning Long-Term Temporal Dependencies in Photovoltaic Power Output Prediction Through Multi-Horizon Forecasting
Sumit Laha, Ankit Sharma, Hassan Foroosh
The rapid global expansion of solar photovoltaic (PV) capacity-reaching a record 597 GW in 2024-highlights the urgent need for robust forecasting models to mitigate the grid instab…
Effective Electronic Structure of Monoclinic alloy semiconductor
Ankit Sharma, Uttam Singisetti
In this article, the electronic band structure alloy system is calculated with as the bulk crystal. The technique of band unfolding is impleme…