no code implementations • ACL (InterNLP) 2021 • Nikhil Mehta, Dan Goldwasser
Easy access, variety of content, and fast widespread interactions are some of the reasons that have made social media increasingly popular in today’s society.
1 code implementation • ACL 2022 • Nikhil Mehta, Maria Pacheco, Dan Goldwasser
We view fake news detection as reasoning over the relations between sources, articles they publish, and engaging users on social media in a graph framework.
no code implementations • 30 Mar 2024 • Yuwei Cao, Nikhil Mehta, Xinyang Yi, Raghunandan Keshavan, Lukasz Heldt, Lichan Hong, Ed H. Chi, Maheswaran Sathiamoorthy
Operations such as Masked Item Modeling (MIM) and Bayesian Personalized Ranking (BPR) have found success in conventional recommender systems.
no code implementations • 22 Dec 2023 • Nikhil Mehta, Kevin J Liang, Jing Huang, Fu-Jen Chu, Li Yin, Tal Hassner
Out-of-distribution (OOD) detection is an important topic for real-world machine learning systems, but settings with limited in-distribution samples have been underexplored.
Out-of-Distribution Detection Out of Distribution (OOD) Detection
no code implementations • 2 Dec 2023 • Vinay K Verma, Nikhil Mehta, Kevin J Liang, Aakansha Mishra, Lawrence Carin
Zero-shot learning (ZSL) is a promising approach to generalizing a model to categories unseen during training by leveraging class attributes, but challenges remain.
1 code implementation • 26 Sep 2023 • Nikhil Mehta, Dan Goldwasser
The rise of social media has enabled the widespread propagation of fake news, text that is published with an intent to spread misinformation and sway beliefs.
no code implementations • 14 Sep 2023 • Nikhil Mehta, Dan Goldwasser
The recent rise of social media has led to the spread of large amounts of fake and biased news, content published with the intent to sway beliefs.
no code implementations • 3 Aug 2023 • Nikhil Mehta, Anima Singh, Xinyang Yi, Sagar Jain, Lichan Hong, Ed H. Chi
When the data distribution is highly skewed, the gains observed by learning multiple representations diminish since the model dominates on head items/interests, leading to poor performance on tail items.
no code implementations • 13 Jun 2023 • Anima Singh, Trung Vu, Raghunandan Keshavan, Nikhil Mehta, Xinyang Yi, Lichan Hong, Lukasz Heldt, Li Wei, Ed Chi, Maheswaran Sathiamoorthy
We showcase how we use them as a replacement of item IDs in a resource-constrained ranking model used in an industrial-scale video sharing platform.
no code implementations • 10 May 2023 • Wang-Cheng Kang, Jianmo Ni, Nikhil Mehta, Maheswaran Sathiamoorthy, Lichan Hong, Ed Chi, Derek Zhiyuan Cheng
In this paper, we conduct a thorough examination of both CF and LLMs within the classic task of user rating prediction, which involves predicting a user's rating for a candidate item based on their past ratings.
no code implementations • 21 Apr 2023 • Nikhil Mehta, Milagro Teruel, Patricio Figueroa Sanz, Xin Deng, Ahmed Hassan Awadallah, Julia Kiseleva
We explore multiple types of help players can give to the AI to guide it and analyze the impact of this help in AI behavior, resulting in performance improvements.
no code implementations • 23 Oct 2022 • Vinay Kumar Verma, Nikhil Mehta, Shijing Si, Ricardo Henao, Lawrence Carin
Weight pruning is among the most popular approaches for compressing deep convolutional neural networks.
no code implementations • 17 Oct 2022 • Dhanasekar Sundararaman, Nikhil Mehta, Lawrence Carin
The model is fine-tuned by introducing a new regularization loss that separates the embeddings of IND and OOD data, which leads to significant gains on the OOD prediction task during testing.
no code implementations • 19 Sep 2021 • Aaditya Prasad, Nikhil Mehta, Matthew Horak, Wan D. Bae
Two data-generators are also used to minimize class imbalance in the high-fidelity dataset and to produce low-fidelity data that is representative of UAV images.
1 code implementation • CVPR 2021 • Vinay Kumar Verma, Kevin J Liang, Nikhil Mehta, Piyush Rai, Lawrence Carin
However, the growth in the number of additional parameters of many of these types of methods can be computationally expensive at larger scales, at times prohibitively so.
no code implementations • 23 Feb 2021 • Vinay Kumar Verma, Kevin Liang, Nikhil Mehta, Lawrence Carin
Zero-shot learning (ZSL) has been shown to be a promising approach to generalizing a model to categories unseen during training by leveraging class attributes, but challenges still remain.
no code implementations • 23 Oct 2020 • Serge Assaad, Shuxi Zeng, Chenyang Tao, Shounak Datta, Nikhil Mehta, Ricardo Henao, Fan Li, Lawrence Carin
A key to causal inference with observational data is achieving balance in predictive features associated with each treatment type.
no code implementations • 13 Aug 2020 • Weituo Hao, Nikhil Mehta, Kevin J Liang, Pengyu Cheng, Mostafa El-Khamy, Lawrence Carin
Experiments on MNIST, FashionMNIST, and CIFAR-10 demonstrate WAFFLe's significant improvement to local test performance and fairness while simultaneously providing an extra layer of security.
no code implementations • 21 Apr 2020 • Nikhil Mehta, Kevin J Liang, Vinay K Verma, Lawrence Carin
Naively trained neural networks tend to experience catastrophic forgetting in sequential task settings, where data from previous tasks are unavailable.
1 code implementation • 3 Apr 2020 • Arindam Sarkar, Nikhil Mehta, Piyush Rai
In addition to leveraging the representational power of multiple layers of stochastic variables via the ladder VAE architecture, our framework offers the following benefits: (1) Unlike existing ladder VAE architectures based on real-valued latent variables, the gamma-distributed latent variables naturally result in non-negativity and sparsity of the learned embeddings, and facilitate their direct interpretation as membership of nodes into (possibly multiple) communities/topics; (2) A novel recognition model for our gamma ladder VAE architecture allows fast inference of node embeddings; and (3) The framework also extends naturally to incorporate node side information (features and/or labels).
1 code implementation • 29 Feb 2020 • Paidamoyo Chapfuwa, Chunyuan Li, Nikhil Mehta, Lawrence Carin, Ricardo Henao
As a result, there is an unmet need in survival analysis for identifying subpopulations with distinct risk profiles, while jointly accounting for accurate individualized time-to-event predictions.
no code implementations • Proceedings of the 36th International Conference on Machine Learning 2019 • Nikhil Mehta, Lawrence Carin, Piyush Rai
Although we develop this framework for a particular type of SBM, namely the \emph{overlapping} stochastic blockmodel, the proposed framework can be adapted readily for other types of SBMs.
1 code implementation • NAACL 2019 • Nikhil Mehta, Dan Goldwasser
Over the last few years, there has been growing interest in learning models for physically grounded language understanding tasks, such as the popular blocks world domain.
no code implementations • 13 Apr 2019 • Rajat Panda, Ankit Pensia, Nikhil Mehta, Mingyuan Zhou, Piyush Rai
We present a probabilistic framework for multi-label learning based on a deep generative model for the binary label vector associated with each observation.