Publications (37)
The miscibility of hydrogen and water in planetary atmospheres and interiors
Akash Gupta, Lars Stixrude, Hilke E. Schlichting
Many planets in the solar system and across the galaxy have hydrogen-rich atmospheres overlying more heavy element-rich interiors with which they interact for billions of years. At…
GAMA: Generative Adversarial Multi-Object Scene Attacks
Abhishek Aich, Calvin-Khang Ta, Akash Gupta +4
The majority of methods for crafting adversarial attacks have focused on scenes with a single dominant object (e.g., images from ImageNet). On the other hand, natural scenes includ…
The fundamentals of Lyman-alpha exoplanet transits
James E. Owen, Ruth A. Murray-Clay, Ethan Schreyer +7
Lyman- transits have been detected from several nearby exoplanets and are one of our best insights into the atmospheric escape process. However, due to ISM absorption, we typic…
LLM Task Interference: An Initial Study on the Impact of Task-Switch in Conversational History
Akash Gupta, Ivaxi Sheth, Vyas Raina +2
With the recent emergence of powerful instruction-tuned large language models (LLMs), various helpful conversational Artificial Intelligence (AI) systems have been deployed across…
A-ACT: Action Anticipation through Cycle Transformations
Akash Gupta, Jingen Liu, Liefeng Bo +2
While action anticipation has garnered a lot of research interest recently, most of the works focus on anticipating future action directly through observed visual cues only. In thi…
Deep Quantized Representation for Enhanced Reconstruction
Akash Gupta, Abhishek Aich, Kevin Rodriguez +2
While machine learning approaches have shown remarkable performance in biomedical image analysis, most of these methods rely on high-quality and accurate imaging data. However, col…
Sculpting the Valley in the Radius Distribution of Small Exoplanets as a by-product of Planet Formation: The Core-Powered Mass-Loss Mechanism
Akash Gupta, Hilke E. Schlichting
Recent observations revealed a bimodal radius distribution of small, short-period exoplanets with a paucity in their occurrence, a radius `valley', around . In…
Ada-VSR: Adaptive Video Super-Resolution with Meta-Learning
Akash Gupta, Padmaja Jonnalagedda, Bir Bhanu +1
Most of the existing works in supervised spatio-temporal video super-resolution (STVSR) heavily rely on a large-scale external dataset consisting of paired low-resolution low-frame…
Classification of histopathology images using ConvNets to detect Lupus Nephritis
Akash Gupta, Anirudh Reddy, CV Jawahar +1
Systemic lupus erythematosus (SLE) is an autoimmune disease in which the immune system of the patient starts attacking healthy tissues of the body. Lupus Nephritis (LN) refers to t…
Non-Adversarial Video Synthesis with Learned Priors
Abhishek Aich, Akash Gupta, Rameswar Panda +3
Most of the existing works in video synthesis focus on generating videos using adversarial learning. Despite their success, these methods often require input reference frame or fai…
Rings of non-spherical, axisymmetric bodies
Akash Gupta, Sharvari Nadkarni-Ghosh, Ishan Sharma
We investigate the dynamical behavior of rings around bodies whose shapes depart considerably from that of a sphere. To this end, we have developed a new self-gravitating discrete…
Embedding the Teacher: Distilling vLLM Preferences for Scalable Image Retrieval
Eric He, Akash Gupta, Adian Liusie +4
Text--image retrieval is necessary for applications such as product recommendation. Embedding-based approaches like CLIP enable efficient large-scale retrieval via vector similarit…
Electrical conductivity of strongly magnetized dense quark matter -- possibility of quantum hall effect
Jayanta Dey, Aritra Bandyopadhyay, Akash Gupta +2
We have pointed out the possibility of quantum Hall effect or quantum patterns of transportation in a degenerate strongly magnetized quark matter, which might be expected inside a…
Mechanical detection of sub-band mobilities of two-dimensional electron gas on reduced SrTiO(001) surface
Akash Gupta, Marcin Kisiel, Remy Pawlak +1
The two-dimensional electron gas (2DEG) in reduced strontium titanate offers a versatile platform for oxide electronics, yet its dissipation mechanisms under field driven charge fl…
Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-Period Transiting Exoplanets
Rachel B. Fernandes, Galen J. Bergsten, Gijs D. Mulders +19
Comparative studies of young and old exoplanet populations offer a glimpse into how planets may form and evolve with time. We present an occurrence rate study of short-period (1…
Adversarial Knowledge Transfer from Unlabeled Data
Akash Gupta, Rameswar Panda, Sujoy Paul +2
While machine learning approaches to visual recognition offer great promise, most of the existing methods rely heavily on the availability of large quantities of labeled training d…
Signatures of the Core-Powered Mass-Loss Mechanism in the Exoplanet Population: Dependence on Stellar Properties and Observational Predictions
Akash Gupta, Hilke E. Schlichting
Recent studies have shown that atmospheric mass-loss powered by the cooling luminosity of a planet's core can explain the observed radius valley separating super-Earths and sub-Nep…
Meta-Adaptive Prompt Distillation for Few-Shot Visual Question Answering
Akash Gupta, Amos Storkey, Mirella Lapata
Large Multimodal Models (LMMs) often rely on in-context learning (ICL) to perform new visual question answering (VQA) tasks with minimal supervision. However, ICL performance, espe…
Obscured star clusters in the Inner Milky Way. How many massive young clusters are still awaiting detection?
Akash Gupta, Valentin D. Ivanov, Thomas Preibisch +1
Aims. Our goal is twofold. First, to detect new clusters we apply the newest methods for the detection of clustering with the best available wide-field sky surveys in the mid-infra…
Caught in the Act: Core-powered Mass-loss Predictions for Observing Atmospheric Escape
Akash Gupta, Hilke E. Schlichting
Past studies have demonstrated that atmospheric escape by the core-powered mass-loss mechanism can explain a multitude of observations associated with the radius valley that separa…
SAFER: Development and Evaluation of an IoT Device Risk Assessment Framework in a Multinational Organization
Pascal Oser, Sebastian Feger, PaweŠW. Woźniak +6
Users of Internet of Things (IoT) devices are often unaware of their security risks and cannot sufficiently factor security considerations into their device selection. This puts ne…
ModEFormer: Modality-Preserving Embedding for Audio-Video Synchronization using Transformers
Akash Gupta, Rohun Tripathi, Wondong Jang
Lack of audio-video synchronization is a common problem during television broadcasts and video conferencing, leading to an unsatisfactory viewing experience. A widely accepted para…
Properties of the radius valley around low mass stars: Predictions from the core-powered mass-loss mechanism
Akash Gupta, Lorraine Nicholson, Hilke E. Schlichting
In recent years, analyzing the bimodality in the size distribution of small planets, i.e., the `radius valley', has given us unprecedented insight into the planet formation process…
The evolutionary track of H/He envelope in the observed population of sub-Neptunes and Super-Earths planets
Raissa Estrela, Mark Swain, Akash Gupta +2
The observational detection of a localized reduction in the small planet occurrence rate, sometimes termed a 'gap', is an exciting discovery because of the implications for planet…
Optimal Sepsis Patient Treatment using Human-in-the-loop Artificial Intelligence
Akash Gupta, Michael T. Lash, Senthil K. Nachimuthu
Sepsis is one of the leading causes of death in Intensive Care Units (ICU). The strategy for treating sepsis involves the infusion of intravenous (IV) fluids and administration of…
Probing the Limits of Stylistic Alignment in Vision-Language Models
Asma Farajidizaji, Akash Gupta, Vatsal Raina
Vision-language models are increasingly used to generate image captions in specific styles, such as humor or romantic. However, these transformer-based models often struggle with t…
Are Kronberger 80 and/or Kronberger 82 regions PeVatron candidates for LHAASO J2108+5157?
Akash Gupta, Eduardo De La Fuente, Ram K. Yadav +13
High-energy gamma rays have been detected in the region of LHAASO~J2108+5157 by the Fermi--LAT, HAWC and LHAASO-KM2A observatories. Cygnus~OB2 in Cygnus--X has been confirmed as th…
Sub-Neptune Memories I: Implications of Inefficient Mantle Cooling and Silicate Rain
Roberto Tejada Arevalo, Akash Gupta, Adam Burrows +3
We explore the evolution of sub-Neptune (radii between 1.5 and 4 R) exoplanet interior structures using our upgraded evolution code, \texttt{APPLE}, which self-consi…
Energy Efficiency Testing and Modeling of a Commercial O-RAN System
N. K. Shankaranarayanan, Akash Gupta, Zhuohuan Li +9
Network energy efficiency is of critical importance to mobile network operators for economic and ecological reasons. The advent of the O-RAN architecture has brought disaggregation…
Photoevaporation vs. core-powered mass-loss: model comparison with the 3D radius gap
James G. Rogers, Akash Gupta, James E. Owen +1
The EUV/X-ray photoevaporation and core-powered mass-loss models are both capable of reproducing the bimodality in the sizes of small, close-in exoplanets observed by the \textit{K…
ZeroBench: An Impossible Visual Benchmark for Contemporary Large Multimodal Models
Jonathan Roberts, Mohammad Reza Taesiri, Ansh Sharma +31
Large Multimodal Models (LMMs) exhibit shortfalls when interpreting images and, by some measures, have poorer spatial cognition than young children or animals. Despite this, they a…
Poisson2Sparse: Self-Supervised Poisson Denoising From a Single Image
Calvin-Khang Ta, Abhishek Aich, Akash Gupta +1
Image enhancement approaches often assume that the noise is signal independent, and approximate the degradation model as zero-mean additive Gaussian. However, this assumption does…
APObind: A Dataset of Ligand Unbound Protein Conformations for Machine Learning Applications in De Novo Drug Design
Rishal Aggarwal, Akash Gupta, U Deva Priyakumar
Protein-ligand complex structures have been utilised to design benchmark machine learning methods that perform important tasks related to drug design such as receptor binding site…
The Fate of Hydrogen and Helium: From Planetary Embryos to Earth- and Neptune-like Worlds
Akash Gupta, Haiyang Luo, Jie Deng +1
Hydrogen, helium, silicates, and iron are key building blocks of rocky and gas-rich planets, yet their chemical interactions remain poorly constrained. Using first-principles molec…
Secure, Anonymity-Preserving and Lightweight Mutual Authentication and Key Agreement Protocol for Home Automation IoT Networks
Akash Gupta, Gaurav S. Kasbekar
Home automation Internet of Things (IoT) systems have recently become a target for several types of attacks. In this paper, we present an authentication and key agreement protocol…
UltraMNIST Classification: A Benchmark to Train CNNs for Very Large Images
Deepak K. Gupta, Udbhav Bamba, Abhishek Thakur +4
Convolutional neural network (CNN) approaches available in the current literature are designed to work primarily with low-resolution images. When applied on very large images, chal…
ALANET: Adaptive Latent Attention Network forJoint Video Deblurring and Interpolation
Akash Gupta, Abhishek Aich, Amit K. Roy-Chowdhury
Existing works address the problem of generating high frame-rate sharp videos by separately learning the frame deblurring and frame interpolation modules. Most of these approaches…